Populate TLS <= 1.2 handshake source files
This commit moves generic/client/server handshake handling
code from ssl_tls.c, ssl_cli.c and ssl_srv.c to the newly
created files ssl_12_gen.c, ssl_12_cli.c and ssl_12_srv.c.
No functional changes have been made. Changes are confined to
moving, reordering, and commenting the code for ease of reading.
diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index 1a70677..1b359e6 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -1102,4 +1102,8 @@
void mbedtls_ssl_flight_free( mbedtls_ssl_flight_item *flight );
#endif /* MBEDTLS_SSL_PROTO_DTLS */
+#if defined(MBEDTLS_X509_CRT_PARSE_C)
+void mbedtls_ssl_clear_peer_cert( mbedtls_ssl_session *session );
+#endif /* MBEDTLS_X509_CRT_PARSE_C */
+
#endif /* ssl_internal.h */
diff --git a/library/ssl_12_cli.c b/library/ssl_12_cli.c
index 0f6a26b..627ba1b 100644
--- a/library/ssl_12_cli.c
+++ b/library/ssl_12_cli.c
@@ -1,5 +1,6 @@
/*
- * SSLv3/TLSv1 client-side functions
+ * Client-specific handshake reading/writing functions
+ * for TLS versions <= 1.2.
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
@@ -56,43 +57,163 @@
#include "mbedtls/platform_util.h"
#endif
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-static int ssl_conf_has_static_psk( mbedtls_ssl_config const *conf )
+/* Forward declarations for state-specific handshake functions. */
+static int ssl_write_client_hello( mbedtls_ssl_context *ssl );
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+static int ssl_parse_hello_verify_request( mbedtls_ssl_context *ssl );
+#endif /* MBEDTLS_SSL_PROTO_DTLS */
+static int ssl_parse_server_hello( mbedtls_ssl_context *ssl );
+static int ssl_parse_server_key_exchange( mbedtls_ssl_context *ssl );
+static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl );
+static int ssl_parse_server_hello_done( mbedtls_ssl_context *ssl );
+static int ssl_write_client_key_exchange( mbedtls_ssl_context *ssl );
+static int ssl_write_certificate_verify( mbedtls_ssl_context *ssl );
+#if defined(MBEDTLS_SSL_SESSION_TICKETS)
+static int ssl_parse_new_session_ticket( mbedtls_ssl_context *ssl );
+#endif /* MBEDTLS_SSL_SESSION_TICKETS */
+
+/*
+ * Client-side handshake state machine
+ *
+ * This function performs a single step in a client-side TLS <= 1.2 handshake.
+ */
+int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl )
{
- if( conf->psk_identity == NULL ||
- conf->psk_identity_len == 0 )
+ int ret = 0;
+
+ if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL )
+ return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "client state: %d", ssl->state ) );
+
+ if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
+ return( ret );
+
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+ if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
+ ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
{
- return( 0 );
+ if( ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
+ return( ret );
}
+#endif /* MBEDTLS_SSL_PROTO_DTLS */
- if( conf->psk != NULL && conf->psk_len != 0 )
- return( 1 );
+ /* Change state now, so that it is right in mbedtls_ssl_read_record(), used
+ * by DTLS for dropping out-of-sequence ChangeCipherSpec records */
+#if defined(MBEDTLS_SSL_SESSION_TICKETS)
+ if( ssl->state == MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC &&
+ ssl->handshake->new_session_ticket != 0 )
+ {
+ ssl->state = MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET;
+ }
+#endif
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- if( conf->psk_opaque != 0 )
- return( 1 );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
+ switch( ssl->state )
+ {
+ case MBEDTLS_SSL_HELLO_REQUEST:
+ ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
+ break;
- return( 0 );
+ /*
+ * ==> ClientHello
+ */
+ case MBEDTLS_SSL_CLIENT_HELLO:
+ ret = ssl_write_client_hello( ssl );
+ break;
+
+ /*
+ * <== ServerHello
+ * Certificate
+ * ( ServerKeyExchange )
+ * ( CertificateRequest )
+ * ServerHelloDone
+ */
+ case MBEDTLS_SSL_SERVER_HELLO:
+ ret = ssl_parse_server_hello( ssl );
+ break;
+
+ case MBEDTLS_SSL_SERVER_CERTIFICATE:
+ ret = mbedtls_ssl_parse_certificate( ssl );
+ break;
+
+ case MBEDTLS_SSL_SERVER_KEY_EXCHANGE:
+ ret = ssl_parse_server_key_exchange( ssl );
+ break;
+
+ case MBEDTLS_SSL_CERTIFICATE_REQUEST:
+ ret = ssl_parse_certificate_request( ssl );
+ break;
+
+ case MBEDTLS_SSL_SERVER_HELLO_DONE:
+ ret = ssl_parse_server_hello_done( ssl );
+ break;
+
+ /*
+ * ==> ( Certificate/Alert )
+ * ClientKeyExchange
+ * ( CertificateVerify )
+ * ChangeCipherSpec
+ * Finished
+ */
+ case MBEDTLS_SSL_CLIENT_CERTIFICATE:
+ ret = mbedtls_ssl_write_certificate( ssl );
+ break;
+
+ case MBEDTLS_SSL_CLIENT_KEY_EXCHANGE:
+ ret = ssl_write_client_key_exchange( ssl );
+ break;
+
+ case MBEDTLS_SSL_CERTIFICATE_VERIFY:
+ ret = ssl_write_certificate_verify( ssl );
+ break;
+
+ case MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC:
+ ret = mbedtls_ssl_write_change_cipher_spec( ssl );
+ break;
+
+ case MBEDTLS_SSL_CLIENT_FINISHED:
+ ret = mbedtls_ssl_write_finished( ssl );
+ break;
+
+ /*
+ * <== ( NewSessionTicket )
+ * ChangeCipherSpec
+ * Finished
+ */
+#if defined(MBEDTLS_SSL_SESSION_TICKETS)
+ case MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET:
+ ret = ssl_parse_new_session_ticket( ssl );
+ break;
+#endif
+
+ case MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC:
+ ret = mbedtls_ssl_parse_change_cipher_spec( ssl );
+ break;
+
+ case MBEDTLS_SSL_SERVER_FINISHED:
+ ret = mbedtls_ssl_parse_finished( ssl );
+ break;
+
+ case MBEDTLS_SSL_FLUSH_BUFFERS:
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
+ ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
+ break;
+
+ case MBEDTLS_SSL_HANDSHAKE_WRAPUP:
+ mbedtls_ssl_handshake_wrapup( ssl );
+ break;
+
+ default:
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
+ return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+ }
+
+ return( ret );
}
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-static int ssl_conf_has_static_raw_psk( mbedtls_ssl_config const *conf )
-{
- if( conf->psk_identity == NULL ||
- conf->psk_identity_len == 0 )
- {
- return( 0 );
- }
-
- if( conf->psk != NULL && conf->psk_len != 0 )
- return( 1 );
-
- return( 0 );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
+/*
+ * ClientHello/ServerHello extension functions.
+ */
#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
static void ssl_write_hostname_ext( mbedtls_ssl_context *ssl,
@@ -395,6 +516,48 @@
*olen = 6;
}
+
+static int ssl_parse_supported_point_formats_ext( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ size_t list_size;
+ const unsigned char *p;
+
+ if( len == 0 || (size_t)( buf[0] + 1 ) != len )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+ list_size = buf[0];
+
+ p = buf + 1;
+ while( list_size > 0 )
+ {
+ if( p[0] == MBEDTLS_ECP_PF_UNCOMPRESSED ||
+ p[0] == MBEDTLS_ECP_PF_COMPRESSED )
+ {
+#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
+ ssl->handshake->ecdh_ctx.point_format = p[0];
+#endif
+#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
+ ssl->handshake->ecjpake_ctx.point_format = p[0];
+#endif
+ MBEDTLS_SSL_DEBUG_MSG( 4, ( "point format selected: %d", p[0] ) );
+ return( 0 );
+ }
+
+ list_size--;
+ p++;
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "no point format in common" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+}
#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
@@ -474,6 +637,36 @@
*olen = kkpp_len + 4;
}
+
+static int ssl_parse_ecjpake_kkpp( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+
+ if( ssl->handshake->ciphersuite_info->key_exchange !=
+ MBEDTLS_KEY_EXCHANGE_ECJPAKE )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip ecjpake kkpp extension" ) );
+ return( 0 );
+ }
+
+ /* If we got here, we no longer need our cached extension */
+ mbedtls_free( ssl->handshake->ecjpake_cache );
+ ssl->handshake->ecjpake_cache = NULL;
+ ssl->handshake->ecjpake_cache_len = 0;
+
+ if( ( ret = mbedtls_ecjpake_read_round_one( &ssl->handshake->ecjpake_ctx,
+ buf, len ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_one", ret );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( ret );
+ }
+
+ return( 0 );
+}
#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
@@ -522,6 +715,60 @@
*olen = ssl->own_cid_len + 5;
}
+
+static int ssl_parse_cid_ext( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ size_t peer_cid_len;
+
+ if( /* CID extension only makes sense in DTLS */
+ ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ||
+ /* The server must only send the CID extension if we have offered it. */
+ ssl->negotiate_cid == MBEDTLS_SSL_CID_DISABLED )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension unexpected" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ if( len == 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension invalid" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ peer_cid_len = *buf++;
+ len--;
+
+ if( peer_cid_len > MBEDTLS_SSL_CID_OUT_LEN_MAX )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension invalid" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ if( len != peer_cid_len )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension invalid" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ ssl->handshake->cid_in_use = MBEDTLS_SSL_CID_ENABLED;
+ ssl->handshake->peer_cid_len = (uint8_t) peer_cid_len;
+ memcpy( ssl->handshake->peer_cid, buf, peer_cid_len );
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "Use of CID extension negotiated" ) );
+ MBEDTLS_SSL_DEBUG_BUF( 3, "Server CID", buf, peer_cid_len );
+
+ return( 0 );
+}
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
@@ -556,6 +803,27 @@
*olen = 5;
}
+
+static int ssl_parse_max_fragment_length_ext( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ /*
+ * server should use the extension only if we did,
+ * and if so the server's value should match ours (and len is always 1)
+ */
+ if( ssl->conf->mfl_code == MBEDTLS_SSL_MAX_FRAG_LEN_NONE ||
+ len != 1 ||
+ buf[0] != ssl->conf->mfl_code )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching max fragment length extension" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ return( 0 );
+}
#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
@@ -588,6 +856,26 @@
*olen = 4;
}
+
+static int ssl_parse_truncated_hmac_ext( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ if( ssl->conf->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED ||
+ len != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching truncated HMAC extension" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ ((void) buf);
+
+ ssl->session_negotiate->trunc_hmac = MBEDTLS_SSL_TRUNC_HMAC_ENABLED;
+
+ return( 0 );
+}
#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
@@ -622,6 +910,27 @@
*olen = 4;
}
+
+static int ssl_parse_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ if( ssl->conf->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED ||
+ ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
+ len != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching encrypt-then-MAC extension" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ ((void) buf);
+
+ ssl->session_negotiate->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
+
+ return( 0 );
+}
#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
@@ -656,6 +965,27 @@
*olen = 4;
}
+
+static int ssl_parse_extended_ms_ext( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ if( ssl->conf->extended_ms == MBEDTLS_SSL_EXTENDED_MS_DISABLED ||
+ ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
+ len != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching extended master secret extension" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ ((void) buf);
+
+ ssl->handshake->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
+
+ return( 0 );
+}
#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
@@ -700,6 +1030,26 @@
*olen += tlen;
}
+
+static int ssl_parse_session_ticket_ext( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ if( ssl->conf->session_tickets == MBEDTLS_SSL_SESSION_TICKETS_DISABLED ||
+ len != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching session ticket extension" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ ((void) buf);
+
+ ssl->handshake->new_session_ticket = 1;
+
+ return( 0 );
+}
#endif /* MBEDTLS_SSL_SESSION_TICKETS */
#if defined(MBEDTLS_SSL_ALPN)
@@ -760,102 +1110,162 @@
buf[2] = (unsigned char)( ( ( *olen - 4 ) >> 8 ) & 0xFF );
buf[3] = (unsigned char)( ( ( *olen - 4 ) ) & 0xFF );
}
-#endif /* MBEDTLS_SSL_ALPN */
-/*
- * Generate random bytes for ClientHello
- */
-static int ssl_generate_random( mbedtls_ssl_context *ssl )
+static int ssl_parse_alpn_ext( mbedtls_ssl_context *ssl,
+ const unsigned char *buf, size_t len )
{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char *p = ssl->handshake->randbytes;
-#if defined(MBEDTLS_HAVE_TIME)
- mbedtls_time_t t;
-#endif
+ size_t list_len, name_len;
+ const char **p;
+
+ /* If we didn't send it, the server shouldn't send it */
+ if( ssl->conf->alpn_list == NULL )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching ALPN extension" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
/*
- * When responding to a verify request, MUST reuse random (RFC 6347 4.2.1)
+ * opaque ProtocolName<1..2^8-1>;
+ *
+ * struct {
+ * ProtocolName protocol_name_list<2..2^16-1>
+ * } ProtocolNameList;
+ *
+ * the "ProtocolNameList" MUST contain exactly one "ProtocolName"
*/
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ssl->handshake->verify_cookie != NULL )
+
+ /* Min length is 2 (list_len) + 1 (name_len) + 1 (name) */
+ if( len < 4 )
+ {
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ list_len = ( buf[0] << 8 ) | buf[1];
+ if( list_len != len - 2 )
+ {
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ name_len = buf[2];
+ if( name_len != list_len - 1 )
+ {
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ /* Check that the server chosen protocol was in our list and save it */
+ for( p = ssl->conf->alpn_list; *p != NULL; p++ )
+ {
+ if( name_len == strlen( *p ) &&
+ memcmp( buf + 3, *p, name_len ) == 0 )
+ {
+ ssl->alpn_chosen = *p;
+ return( 0 );
+ }
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "ALPN extension: no matching protocol" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+}
+#endif /* MBEDTLS_SSL_ALPN */
+
+static int ssl_parse_renegotiation_info( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+#if defined(MBEDTLS_SSL_RENEGOTIATION)
+ if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
+ {
+ /* Check verify-data in constant-time. The length OTOH is no secret */
+ if( len != 1 + ssl->verify_data_len * 2 ||
+ buf[0] != ssl->verify_data_len * 2 ||
+ mbedtls_ssl_safer_memcmp( buf + 1,
+ ssl->own_verify_data, ssl->verify_data_len ) != 0 ||
+ mbedtls_ssl_safer_memcmp( buf + 1 + ssl->verify_data_len,
+ ssl->peer_verify_data, ssl->verify_data_len ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+ }
+ else
+#endif /* MBEDTLS_SSL_RENEGOTIATION */
+ {
+ if( len != 1 || buf[0] != 0x00 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ }
+
+ ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
+ }
+
+ return( 0 );
+}
+
+/*
+ * Uncategorized helpers
+ */
+
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
+static int ssl_conf_has_static_psk( mbedtls_ssl_config const *conf )
+{
+ if( conf->psk_identity == NULL ||
+ conf->psk_identity_len == 0 )
{
return( 0 );
}
-#endif
-#if defined(MBEDTLS_HAVE_TIME)
- t = mbedtls_time( NULL );
- *p++ = (unsigned char)( t >> 24 );
- *p++ = (unsigned char)( t >> 16 );
- *p++ = (unsigned char)( t >> 8 );
- *p++ = (unsigned char)( t );
+ if( conf->psk != NULL && conf->psk_len != 0 )
+ return( 1 );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, current time: %lu", t ) );
-#else
- if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 4 ) ) != 0 )
- return( ret );
-
- p += 4;
-#endif /* MBEDTLS_HAVE_TIME */
-
- if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 28 ) ) != 0 )
- return( ret );
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+ if( conf->psk_opaque != 0 )
+ return( 1 );
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
return( 0 );
}
-/**
- * \brief Validate cipher suite against config in SSL context.
- *
- * \param suite_info cipher suite to validate
- * \param ssl SSL context
- * \param min_minor_ver Minimal minor version to accept a cipher suite
- * \param max_minor_ver Maximal minor version to accept a cipher suite
- *
- * \return 0 if valid, else 1
- */
-static int ssl_validate_ciphersuite( const mbedtls_ssl_ciphersuite_t * suite_info,
- const mbedtls_ssl_context * ssl,
- int min_minor_ver, int max_minor_ver )
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+static int ssl_conf_has_static_raw_psk( mbedtls_ssl_config const *conf )
{
- (void) ssl;
- if( suite_info == NULL )
- return( 1 );
-
- if( suite_info->min_minor_ver > max_minor_ver ||
- suite_info->max_minor_ver < min_minor_ver )
- return( 1 );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ( suite_info->flags & MBEDTLS_CIPHERSUITE_NODTLS ) )
- return( 1 );
-#endif
-
-#if defined(MBEDTLS_ARC4_C)
- if( ssl->conf->arc4_disabled == MBEDTLS_SSL_ARC4_DISABLED &&
- suite_info->cipher == MBEDTLS_CIPHER_ARC4_128 )
- return( 1 );
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( suite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE &&
- mbedtls_ecjpake_check( &ssl->handshake->ecjpake_ctx ) != 0 )
- return( 1 );
-#endif
-
- /* Don't suggest PSK-based ciphersuite if no PSK is available. */
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
- if( mbedtls_ssl_ciphersuite_uses_psk( suite_info ) &&
- ssl_conf_has_static_psk( ssl->conf ) == 0 )
+ if( conf->psk_identity == NULL ||
+ conf->psk_identity_len == 0 )
{
- return( 1 );
+ return( 0 );
}
+
+ if( conf->psk != NULL && conf->psk_len != 0 )
+ return( 1 );
+
+ return( 0 );
+}
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
- return( 0 );
-}
+/*
+ * CLIENT HANDSHAKE STATE: Outgoing ClientHello
+ */
+
+static int ssl_validate_ciphersuite( const mbedtls_ssl_ciphersuite_t * suite_info,
+ const mbedtls_ssl_context * ssl,
+ int min_minor_ver, int max_minor_ver );
+
+static int ssl_generate_random( mbedtls_ssl_context *ssl );
static int ssl_write_client_hello( mbedtls_ssl_context *ssl )
{
@@ -1213,358 +1623,104 @@
return( 0 );
}
-static int ssl_parse_renegotiation_info( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- /* Check verify-data in constant-time. The length OTOH is no secret */
- if( len != 1 + ssl->verify_data_len * 2 ||
- buf[0] != ssl->verify_data_len * 2 ||
- mbedtls_ssl_safer_memcmp( buf + 1,
- ssl->own_verify_data, ssl->verify_data_len ) != 0 ||
- mbedtls_ssl_safer_memcmp( buf + 1 + ssl->verify_data_len,
- ssl->peer_verify_data, ssl->verify_data_len ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- }
- else
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
- {
- if( len != 1 || buf[0] != 0x00 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
- }
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-static int ssl_parse_max_fragment_length_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- /*
- * server should use the extension only if we did,
- * and if so the server's value should match ours (and len is always 1)
- */
- if( ssl->conf->mfl_code == MBEDTLS_SSL_MAX_FRAG_LEN_NONE ||
- len != 1 ||
- buf[0] != ssl->conf->mfl_code )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching max fragment length extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-static int ssl_parse_truncated_hmac_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->conf->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED ||
- len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching truncated HMAC extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->session_negotiate->trunc_hmac = MBEDTLS_SSL_TRUNC_HMAC_ENABLED;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-static int ssl_parse_cid_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- size_t peer_cid_len;
-
- if( /* CID extension only makes sense in DTLS */
- ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ||
- /* The server must only send the CID extension if we have offered it. */
- ssl->negotiate_cid == MBEDTLS_SSL_CID_DISABLED )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension unexpected" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- if( len == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension invalid" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- peer_cid_len = *buf++;
- len--;
-
- if( peer_cid_len > MBEDTLS_SSL_CID_OUT_LEN_MAX )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension invalid" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- if( len != peer_cid_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension invalid" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ssl->handshake->cid_in_use = MBEDTLS_SSL_CID_ENABLED;
- ssl->handshake->peer_cid_len = (uint8_t) peer_cid_len;
- memcpy( ssl->handshake->peer_cid, buf, peer_cid_len );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Use of CID extension negotiated" ) );
- MBEDTLS_SSL_DEBUG_BUF( 3, "Server CID", buf, peer_cid_len );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-static int ssl_parse_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->conf->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED ||
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
- len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching encrypt-then-MAC extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->session_negotiate->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
-static int ssl_parse_extended_ms_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->conf->extended_ms == MBEDTLS_SSL_EXTENDED_MS_DISABLED ||
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
- len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching extended master secret extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->handshake->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-static int ssl_parse_session_ticket_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->conf->session_tickets == MBEDTLS_SSL_SESSION_TICKETS_DISABLED ||
- len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching session ticket extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->handshake->new_session_ticket = 1;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static int ssl_parse_supported_point_formats_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- size_t list_size;
- const unsigned char *p;
-
- if( len == 0 || (size_t)( buf[0] + 1 ) != len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- list_size = buf[0];
-
- p = buf + 1;
- while( list_size > 0 )
- {
- if( p[0] == MBEDTLS_ECP_PF_UNCOMPRESSED ||
- p[0] == MBEDTLS_ECP_PF_COMPRESSED )
- {
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
- ssl->handshake->ecdh_ctx.point_format = p[0];
-#endif
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- ssl->handshake->ecjpake_ctx.point_format = p[0];
-#endif
- MBEDTLS_SSL_DEBUG_MSG( 4, ( "point format selected: %d", p[0] ) );
- return( 0 );
- }
-
- list_size--;
- p++;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "no point format in common" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
-}
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
- MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static int ssl_parse_ecjpake_kkpp( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
+/*
+ * Generate random bytes for ClientHello
+ */
+static int ssl_generate_random( mbedtls_ssl_context *ssl )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ unsigned char *p = ssl->handshake->randbytes;
+#if defined(MBEDTLS_HAVE_TIME)
+ mbedtls_time_t t;
+#endif
- if( ssl->handshake->ciphersuite_info->key_exchange !=
- MBEDTLS_KEY_EXCHANGE_ECJPAKE )
+ /*
+ * When responding to a verify request, MUST reuse random (RFC 6347 4.2.1)
+ */
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+ if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
+ ssl->handshake->verify_cookie != NULL )
{
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip ecjpake kkpp extension" ) );
return( 0 );
}
+#endif
- /* If we got here, we no longer need our cached extension */
- mbedtls_free( ssl->handshake->ecjpake_cache );
- ssl->handshake->ecjpake_cache = NULL;
- ssl->handshake->ecjpake_cache_len = 0;
+#if defined(MBEDTLS_HAVE_TIME)
+ t = mbedtls_time( NULL );
+ *p++ = (unsigned char)( t >> 24 );
+ *p++ = (unsigned char)( t >> 16 );
+ *p++ = (unsigned char)( t >> 8 );
+ *p++ = (unsigned char)( t );
- if( ( ret = mbedtls_ecjpake_read_round_one( &ssl->handshake->ecjpake_ctx,
- buf, len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_one", ret );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, current time: %lu", t ) );
+#else
+ if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 4 ) ) != 0 )
return( ret );
- }
+
+ p += 4;
+#endif /* MBEDTLS_HAVE_TIME */
+
+ if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 28 ) ) != 0 )
+ return( ret );
return( 0 );
}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-#if defined(MBEDTLS_SSL_ALPN)
-static int ssl_parse_alpn_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf, size_t len )
+/**
+ * \brief Validate cipher suite against config in SSL context.
+ *
+ * \param suite_info cipher suite to validate
+ * \param ssl SSL context
+ * \param min_minor_ver Minimal minor version to accept a cipher suite
+ * \param max_minor_ver Maximal minor version to accept a cipher suite
+ *
+ * \return 0 if valid, else 1
+ */
+static int ssl_validate_ciphersuite( const mbedtls_ssl_ciphersuite_t * suite_info,
+ const mbedtls_ssl_context * ssl,
+ int min_minor_ver, int max_minor_ver )
{
- size_t list_len, name_len;
- const char **p;
+ (void) ssl;
+ if( suite_info == NULL )
+ return( 1 );
- /* If we didn't send it, the server shouldn't send it */
- if( ssl->conf->alpn_list == NULL )
+ if( suite_info->min_minor_ver > max_minor_ver ||
+ suite_info->max_minor_ver < min_minor_ver )
+ return( 1 );
+
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+ if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
+ ( suite_info->flags & MBEDTLS_CIPHERSUITE_NODTLS ) )
+ return( 1 );
+#endif
+
+#if defined(MBEDTLS_ARC4_C)
+ if( ssl->conf->arc4_disabled == MBEDTLS_SSL_ARC4_DISABLED &&
+ suite_info->cipher == MBEDTLS_CIPHER_ARC4_128 )
+ return( 1 );
+#endif
+
+#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
+ if( suite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE &&
+ mbedtls_ecjpake_check( &ssl->handshake->ecjpake_ctx ) != 0 )
+ return( 1 );
+#endif
+
+ /* Don't suggest PSK-based ciphersuite if no PSK is available. */
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
+ if( mbedtls_ssl_ciphersuite_uses_psk( suite_info ) &&
+ ssl_conf_has_static_psk( ssl->conf ) == 0 )
{
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching ALPN extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ return( 1 );
}
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
- /*
- * opaque ProtocolName<1..2^8-1>;
- *
- * struct {
- * ProtocolName protocol_name_list<2..2^16-1>
- * } ProtocolNameList;
- *
- * the "ProtocolNameList" MUST contain exactly one "ProtocolName"
- */
-
- /* Min length is 2 (list_len) + 1 (name_len) + 1 (name) */
- if( len < 4 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- list_len = ( buf[0] << 8 ) | buf[1];
- if( list_len != len - 2 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- name_len = buf[2];
- if( name_len != list_len - 1 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- /* Check that the server chosen protocol was in our list and save it */
- for( p = ssl->conf->alpn_list; *p != NULL; p++ )
- {
- if( name_len == strlen( *p ) &&
- memcmp( buf + 3, *p, name_len ) == 0 )
- {
- ssl->alpn_chosen = *p;
- return( 0 );
- }
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "ALPN extension: no matching protocol" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
+ return( 0 );
}
-#endif /* MBEDTLS_SSL_ALPN */
+
+/*
+ * CLIENT HANDSHAKE STATE: Incoming `HelloVerifyRequest`
+ */
/*
* Parse HelloVerifyRequest. Only called after verifying the HS type.
@@ -1641,6 +1797,10 @@
}
#endif /* MBEDTLS_SSL_PROTO_DTLS */
+/*
+ * CLIENT HANDSHAKE STATE: Incoming `ServerHello`
+ */
+
static int ssl_parse_server_hello( mbedtls_ssl_context *ssl )
{
int ret, i;
@@ -2154,319 +2314,23 @@
return( 0 );
}
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
-static int ssl_parse_server_dh_params( mbedtls_ssl_context *ssl, unsigned char **p,
- unsigned char *end )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
-
- /*
- * Ephemeral DH parameters:
- *
- * struct {
- * opaque dh_p<1..2^16-1>;
- * opaque dh_g<1..2^16-1>;
- * opaque dh_Ys<1..2^16-1>;
- * } ServerDHParams;
- */
- if( ( ret = mbedtls_dhm_read_params( &ssl->handshake->dhm_ctx, p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 2, ( "mbedtls_dhm_read_params" ), ret );
- return( ret );
- }
-
- if( ssl->handshake->dhm_ctx.len * 8 < ssl->conf->dhm_min_bitlen )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "DHM prime too short: %d < %d",
- ssl->handshake->dhm_ctx.len * 8,
- ssl->conf->dhm_min_bitlen ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: P ", &ssl->handshake->dhm_ctx.P );
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: G ", &ssl->handshake->dhm_ctx.G );
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: GY", &ssl->handshake->dhm_ctx.GY );
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
-static int ssl_check_server_ecdh_params( const mbedtls_ssl_context *ssl )
-{
- const mbedtls_ecp_curve_info *curve_info;
- mbedtls_ecp_group_id grp_id;
-#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
- grp_id = ssl->handshake->ecdh_ctx.grp.id;
-#else
- grp_id = ssl->handshake->ecdh_ctx.grp_id;
-#endif
-
- curve_info = mbedtls_ecp_curve_info_from_grp_id( grp_id );
- if( curve_info == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "ECDH curve: %s", curve_info->name ) );
-
-#if defined(MBEDTLS_ECP_C)
- if( mbedtls_ssl_check_curve( ssl, grp_id ) != 0 )
-#else
- if( ssl->handshake->ecdh_ctx.grp.nbits < 163 ||
- ssl->handshake->ecdh_ctx.grp.nbits > 521 )
-#endif
- return( -1 );
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_QP );
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO) && \
- ( defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) )
-static int ssl_parse_server_ecdh_params_psa( mbedtls_ssl_context *ssl,
- unsigned char **p,
- unsigned char *end )
-{
- uint16_t tls_id;
- size_t ecdh_bits = 0;
- uint8_t ecpoint_len;
- mbedtls_ssl_handshake_params *handshake = ssl->handshake;
-
- /*
- * Parse ECC group
- */
-
- if( end - *p < 4 )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
-
- /* First byte is curve_type; only named_curve is handled */
- if( *(*p)++ != MBEDTLS_ECP_TLS_NAMED_CURVE )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
-
- /* Next two bytes are the namedcurve value */
- tls_id = *(*p)++;
- tls_id <<= 8;
- tls_id |= *(*p)++;
-
- /* Convert EC group to PSA key type. */
- if( ( handshake->ecdh_psa_type =
- mbedtls_psa_parse_tls_ecc_group( tls_id, &ecdh_bits ) ) == 0 )
- {
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- if( ecdh_bits > 0xffff )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- handshake->ecdh_bits = (uint16_t) ecdh_bits;
-
- /*
- * Put peer's ECDH public key in the format understood by PSA.
- */
-
- ecpoint_len = *(*p)++;
- if( (size_t)( end - *p ) < ecpoint_len )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
-
- if( mbedtls_psa_tls_ecpoint_to_psa_ec(
- *p, ecpoint_len,
- handshake->ecdh_psa_peerkey,
- sizeof( handshake->ecdh_psa_peerkey ),
- &handshake->ecdh_psa_peerkey_len ) != 0 )
- {
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
-
- *p += ecpoint_len;
- return( 0 );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO &&
- ( MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ) */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
-static int ssl_parse_server_ecdh_params( mbedtls_ssl_context *ssl,
- unsigned char **p,
- unsigned char *end )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
-
- /*
- * Ephemeral ECDH parameters:
- *
- * struct {
- * ECParameters curve_params;
- * ECPoint public;
- * } ServerECDHParams;
- */
- if( ( ret = mbedtls_ecdh_read_params( &ssl->handshake->ecdh_ctx,
- (const unsigned char **) p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_read_params" ), ret );
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS )
- ret = MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS;
-#endif
- return( ret );
- }
-
- if( ssl_check_server_ecdh_params( ssl ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message (ECDHE curve)" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-static int ssl_parse_server_psk_hint( mbedtls_ssl_context *ssl,
- unsigned char **p,
- unsigned char *end )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
- size_t len;
- ((void) ssl);
-
- /*
- * PSK parameters:
- *
- * opaque psk_identity_hint<0..2^16-1>;
- */
- if( end - (*p) < 2 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
- "(psk_identity_hint length)" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- len = (*p)[0] << 8 | (*p)[1];
- *p += 2;
-
- if( end - (*p) < (int) len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
- "(psk_identity_hint length)" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- /*
- * Note: we currently ignore the PKS identity hint, as we only allow one
- * PSK to be provisionned on the client. This could be changed later if
- * someone needs that feature.
- */
- *p += len;
- ret = 0;
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
/*
- * Generate a pre-master secret and encrypt it with the server's RSA key
+ * CLIENT HANDSHAKE STATE: Incoming `Certificate`
+ *
+ * This is shared with the server-side and implemented in ssl_12_gen.c.
*/
-static int ssl_write_encrypted_pms( mbedtls_ssl_context *ssl,
- size_t offset, size_t *olen,
- size_t pms_offset )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t len_bytes = ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ? 0 : 2;
- unsigned char *p = ssl->handshake->premaster + pms_offset;
- mbedtls_pk_context * peer_pk;
- if( offset + len_bytes > MBEDTLS_SSL_OUT_CONTENT_LEN )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small for encrypted pms" ) );
- return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
- }
+/*
+ * CLIENT HANDSHAKE STATE: Incoming `ServerKeyExchange`
+ */
- /*
- * Generate (part of) the pre-master as
- * struct {
- * ProtocolVersion client_version;
- * opaque random[46];
- * } PreMasterSecret;
- */
- mbedtls_ssl_write_version( ssl->conf->max_major_ver, ssl->conf->max_minor_ver,
- ssl->conf->transport, p );
+/* Some forward declarations for the parsing function. */
- if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p + 2, 46 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "f_rng", ret );
- return( ret );
- }
-
- ssl->handshake->pmslen = 48;
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- peer_pk = &ssl->handshake->peer_pubkey;
-#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( ssl->session_negotiate->peer_cert == NULL )
- {
- /* Should never happen */
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
- peer_pk = &ssl->session_negotiate->peer_cert->pk;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- /*
- * Now write it out, encrypted
- */
- if( ! mbedtls_pk_can_do( peer_pk, MBEDTLS_PK_RSA ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate key type mismatch" ) );
- return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
- }
-
- if( ( ret = mbedtls_pk_encrypt( peer_pk,
- p, ssl->handshake->pmslen,
- ssl->out_msg + offset + len_bytes, olen,
- MBEDTLS_SSL_OUT_CONTENT_LEN - offset - len_bytes,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_rsa_pkcs1_encrypt", ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( len_bytes == 2 )
- {
- ssl->out_msg[offset+0] = (unsigned char)( *olen >> 8 );
- ssl->out_msg[offset+1] = (unsigned char)( *olen );
- *olen += 2;
- }
-#endif
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- /* We don't need the peer's public key anymore. Free it. */
- mbedtls_pk_free( peer_pk );
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
+static int ssl_get_ecdh_params_from_cert( mbedtls_ssl_context *ssl );
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
+ MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
@@ -2476,113 +2340,55 @@
unsigned char **p,
unsigned char *end,
mbedtls_md_type_t *md_alg,
- mbedtls_pk_type_t *pk_alg )
-{
- ((void) ssl);
- *md_alg = MBEDTLS_MD_NONE;
- *pk_alg = MBEDTLS_PK_NONE;
-
- /* Only in TLS 1.2 */
- if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- return( 0 );
- }
-
- if( (*p) + 2 > end )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
-
- /*
- * Get hash algorithm
- */
- if( ( *md_alg = mbedtls_ssl_md_alg_from_hash( (*p)[0] ) ) == MBEDTLS_MD_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Server used unsupported "
- "HashAlgorithm %d", *(p)[0] ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- /*
- * Get signature algorithm
- */
- if( ( *pk_alg = mbedtls_ssl_pk_alg_from_sig( (*p)[1] ) ) == MBEDTLS_PK_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used unsupported "
- "SignatureAlgorithm %d", (*p)[1] ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- /*
- * Check if the hash is acceptable
- */
- if( mbedtls_ssl_check_sig_hash( ssl, *md_alg ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used HashAlgorithm %d that was not offered",
- *(p)[0] ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "Server used SignatureAlgorithm %d", (*p)[1] ) );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "Server used HashAlgorithm %d", (*p)[0] ) );
- *p += 2;
-
- return( 0 );
-}
+ mbedtls_pk_type_t *pk_alg );
#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
+static int ssl_parse_server_psk_hint( mbedtls_ssl_context *ssl,
+ unsigned char **p,
+ unsigned char *end );
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
+static int ssl_parse_server_ecdh_params( mbedtls_ssl_context *ssl,
+ unsigned char **p,
+ unsigned char *end );
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO) && \
+ ( defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) )
+static int ssl_parse_server_ecdh_params_psa( mbedtls_ssl_context *ssl,
+ unsigned char **p,
+ unsigned char *end );
+#endif /* MBEDTLS_USE_PSA_CRYPTO &&
+ ( MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ) */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
+static int ssl_parse_server_dh_params( mbedtls_ssl_context *ssl, unsigned char **p,
+ unsigned char *end );
+#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
-static int ssl_get_ecdh_params_from_cert( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- const mbedtls_ecp_keypair *peer_key;
- mbedtls_pk_context * peer_pk;
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- peer_pk = &ssl->handshake->peer_pubkey;
-#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( ssl->session_negotiate->peer_cert == NULL )
- {
- /* Should never happen */
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
- peer_pk = &ssl->session_negotiate->peer_cert->pk;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- if( ! mbedtls_pk_can_do( peer_pk, MBEDTLS_PK_ECKEY ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server key not ECDH capable" ) );
- return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
- }
-
- peer_key = mbedtls_pk_ec( *peer_pk );
-
- if( ( ret = mbedtls_ecdh_get_params( &ssl->handshake->ecdh_ctx, peer_key,
- MBEDTLS_ECDH_THEIRS ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_get_params" ), ret );
- return( ret );
- }
-
- if( ssl_check_server_ecdh_params( ssl ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server certificate (ECDH curve)" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
- }
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- /* We don't need the peer's public key anymore. Free it,
- * so that more RAM is available for upcoming expensive
- * operations like ECDHE. */
- mbedtls_pk_free( peer_pk );
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
+static int ssl_check_server_ecdh_params( const mbedtls_ssl_context *ssl );
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
static int ssl_parse_server_key_exchange( mbedtls_ssl_context *ssl )
@@ -2955,6 +2761,353 @@
return( 0 );
}
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
+static int ssl_parse_server_dh_params( mbedtls_ssl_context *ssl, unsigned char **p,
+ unsigned char *end )
+{
+ int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
+
+ /*
+ * Ephemeral DH parameters:
+ *
+ * struct {
+ * opaque dh_p<1..2^16-1>;
+ * opaque dh_g<1..2^16-1>;
+ * opaque dh_Ys<1..2^16-1>;
+ * } ServerDHParams;
+ */
+ if( ( ret = mbedtls_dhm_read_params( &ssl->handshake->dhm_ctx, p, end ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 2, ( "mbedtls_dhm_read_params" ), ret );
+ return( ret );
+ }
+
+ if( ssl->handshake->dhm_ctx.len * 8 < ssl->conf->dhm_min_bitlen )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "DHM prime too short: %d < %d",
+ ssl->handshake->dhm_ctx.len * 8,
+ ssl->conf->dhm_min_bitlen ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
+
+ MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: P ", &ssl->handshake->dhm_ctx.P );
+ MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: G ", &ssl->handshake->dhm_ctx.G );
+ MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: GY", &ssl->handshake->dhm_ctx.GY );
+
+ return( ret );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
+static int ssl_check_server_ecdh_params( const mbedtls_ssl_context *ssl )
+{
+ const mbedtls_ecp_curve_info *curve_info;
+ mbedtls_ecp_group_id grp_id;
+#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
+ grp_id = ssl->handshake->ecdh_ctx.grp.id;
+#else
+ grp_id = ssl->handshake->ecdh_ctx.grp_id;
+#endif
+
+ curve_info = mbedtls_ecp_curve_info_from_grp_id( grp_id );
+ if( curve_info == NULL )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "ECDH curve: %s", curve_info->name ) );
+
+#if defined(MBEDTLS_ECP_C)
+ if( mbedtls_ssl_check_curve( ssl, grp_id ) != 0 )
+#else
+ if( ssl->handshake->ecdh_ctx.grp.nbits < 163 ||
+ ssl->handshake->ecdh_ctx.grp.nbits > 521 )
+#endif
+ return( -1 );
+
+ MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
+ MBEDTLS_DEBUG_ECDH_QP );
+
+ return( 0 );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO) && \
+ ( defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) )
+static int ssl_parse_server_ecdh_params_psa( mbedtls_ssl_context *ssl,
+ unsigned char **p,
+ unsigned char *end )
+{
+ uint16_t tls_id;
+ size_t ecdh_bits = 0;
+ uint8_t ecpoint_len;
+ mbedtls_ssl_handshake_params *handshake = ssl->handshake;
+
+ /*
+ * Parse ECC group
+ */
+
+ if( end - *p < 4 )
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+
+ /* First byte is curve_type; only named_curve is handled */
+ if( *(*p)++ != MBEDTLS_ECP_TLS_NAMED_CURVE )
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+
+ /* Next two bytes are the namedcurve value */
+ tls_id = *(*p)++;
+ tls_id <<= 8;
+ tls_id |= *(*p)++;
+
+ /* Convert EC group to PSA key type. */
+ if( ( handshake->ecdh_psa_type =
+ mbedtls_psa_parse_tls_ecc_group( tls_id, &ecdh_bits ) ) == 0 )
+ {
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
+ if( ecdh_bits > 0xffff )
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ handshake->ecdh_bits = (uint16_t) ecdh_bits;
+
+ /*
+ * Put peer's ECDH public key in the format understood by PSA.
+ */
+
+ ecpoint_len = *(*p)++;
+ if( (size_t)( end - *p ) < ecpoint_len )
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+
+ if( mbedtls_psa_tls_ecpoint_to_psa_ec(
+ *p, ecpoint_len,
+ handshake->ecdh_psa_peerkey,
+ sizeof( handshake->ecdh_psa_peerkey ),
+ &handshake->ecdh_psa_peerkey_len ) != 0 )
+ {
+ return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
+ }
+
+ *p += ecpoint_len;
+ return( 0 );
+}
+#endif /* MBEDTLS_USE_PSA_CRYPTO &&
+ ( MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ) */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
+static int ssl_parse_server_ecdh_params( mbedtls_ssl_context *ssl,
+ unsigned char **p,
+ unsigned char *end )
+{
+ int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
+
+ /*
+ * Ephemeral ECDH parameters:
+ *
+ * struct {
+ * ECParameters curve_params;
+ * ECPoint public;
+ * } ServerECDHParams;
+ */
+ if( ( ret = mbedtls_ecdh_read_params( &ssl->handshake->ecdh_ctx,
+ (const unsigned char **) p, end ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_read_params" ), ret );
+#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
+ if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS )
+ ret = MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS;
+#endif
+ return( ret );
+ }
+
+ if( ssl_check_server_ecdh_params( ssl ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message (ECDHE curve)" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
+
+ return( ret );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
+static int ssl_parse_server_psk_hint( mbedtls_ssl_context *ssl,
+ unsigned char **p,
+ unsigned char *end )
+{
+ int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
+ size_t len;
+ ((void) ssl);
+
+ /*
+ * PSK parameters:
+ *
+ * opaque psk_identity_hint<0..2^16-1>;
+ */
+ if( end - (*p) < 2 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
+ "(psk_identity_hint length)" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
+ len = (*p)[0] << 8 | (*p)[1];
+ *p += 2;
+
+ if( end - (*p) < (int) len )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
+ "(psk_identity_hint length)" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
+
+ /*
+ * Note: we currently ignore the PKS identity hint, as we only allow one
+ * PSK to be provisionned on the client. This could be changed later if
+ * someone needs that feature.
+ */
+ *p += len;
+ ret = 0;
+
+ return( ret );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
+static int ssl_get_ecdh_params_from_cert( mbedtls_ssl_context *ssl )
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ const mbedtls_ecp_keypair *peer_key;
+ mbedtls_pk_context * peer_pk;
+
+#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+ peer_pk = &ssl->handshake->peer_pubkey;
+#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+ if( ssl->session_negotiate->peer_cert == NULL )
+ {
+ /* Should never happen */
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+ }
+ peer_pk = &ssl->session_negotiate->peer_cert->pk;
+#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
+ if( ! mbedtls_pk_can_do( peer_pk, MBEDTLS_PK_ECKEY ) )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "server key not ECDH capable" ) );
+ return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
+ }
+
+ peer_key = mbedtls_pk_ec( *peer_pk );
+
+ if( ( ret = mbedtls_ecdh_get_params( &ssl->handshake->ecdh_ctx, peer_key,
+ MBEDTLS_ECDH_THEIRS ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_get_params" ), ret );
+ return( ret );
+ }
+
+ if( ssl_check_server_ecdh_params( ssl ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server certificate (ECDH curve)" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
+ }
+
+#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+ /* We don't need the peer's public key anymore. Free it,
+ * so that more RAM is available for upcoming expensive
+ * operations like ECDHE. */
+ mbedtls_pk_free( peer_pk );
+#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
+ return( ret );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
+ MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
+static int ssl_parse_signature_algorithm( mbedtls_ssl_context *ssl,
+ unsigned char **p,
+ unsigned char *end,
+ mbedtls_md_type_t *md_alg,
+ mbedtls_pk_type_t *pk_alg )
+{
+ ((void) ssl);
+ *md_alg = MBEDTLS_MD_NONE;
+ *pk_alg = MBEDTLS_PK_NONE;
+
+ /* Only in TLS 1.2 */
+ if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
+ {
+ return( 0 );
+ }
+
+ if( (*p) + 2 > end )
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+
+ /*
+ * Get hash algorithm
+ */
+ if( ( *md_alg = mbedtls_ssl_md_alg_from_hash( (*p)[0] ) ) == MBEDTLS_MD_NONE )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "Server used unsupported "
+ "HashAlgorithm %d", *(p)[0] ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
+
+ /*
+ * Get signature algorithm
+ */
+ if( ( *pk_alg = mbedtls_ssl_pk_alg_from_sig( (*p)[1] ) ) == MBEDTLS_PK_NONE )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used unsupported "
+ "SignatureAlgorithm %d", (*p)[1] ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
+
+ /*
+ * Check if the hash is acceptable
+ */
+ if( mbedtls_ssl_check_sig_hash( ssl, *md_alg ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used HashAlgorithm %d that was not offered",
+ *(p)[0] ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "Server used SignatureAlgorithm %d", (*p)[1] ) );
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "Server used HashAlgorithm %d", (*p)[0] ) );
+ *p += 2;
+
+ return( 0 );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
+
+/*
+ * CLIENT HANDSHAKE STATE: Incoming `CertificateRequest`
+ */
+
#if ! defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
{
@@ -3138,6 +3291,10 @@
}
#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
+/*
+ * CLIENT HANDSHAKE STATE: Incoming `ServerHelloDone`
+ */
+
static int ssl_parse_server_hello_done( mbedtls_ssl_context *ssl )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
@@ -3177,6 +3334,24 @@
return( 0 );
}
+/*
+ * CLIENT HANDSHAKE STATE: Outgoing `Certificate`
+ *
+ * This is shared with the server-side and implemented in ssl_12_gen.c.
+ */
+
+/*
+ * CLIENT HANDSHAKE STATE: Outgoing `ClientKeyExchange`
+ */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
+static int ssl_write_encrypted_pms( mbedtls_ssl_context *ssl,
+ size_t offset, size_t *olen,
+ size_t pms_offset );
+#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
+
static int ssl_write_client_key_exchange( mbedtls_ssl_context *ssl )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
@@ -3592,6 +3767,95 @@
return( 0 );
}
+#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
+static int ssl_write_encrypted_pms( mbedtls_ssl_context *ssl,
+ size_t offset, size_t *olen,
+ size_t pms_offset )
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ size_t len_bytes = ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ? 0 : 2;
+ unsigned char *p = ssl->handshake->premaster + pms_offset;
+ mbedtls_pk_context * peer_pk;
+
+ if( offset + len_bytes > MBEDTLS_SSL_OUT_CONTENT_LEN )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small for encrypted pms" ) );
+ return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
+ }
+
+ /*
+ * Generate (part of) the pre-master as
+ * struct {
+ * ProtocolVersion client_version;
+ * opaque random[46];
+ * } PreMasterSecret;
+ */
+ mbedtls_ssl_write_version( ssl->conf->max_major_ver, ssl->conf->max_minor_ver,
+ ssl->conf->transport, p );
+
+ if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p + 2, 46 ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "f_rng", ret );
+ return( ret );
+ }
+
+ ssl->handshake->pmslen = 48;
+
+#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+ peer_pk = &ssl->handshake->peer_pubkey;
+#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+ if( ssl->session_negotiate->peer_cert == NULL )
+ {
+ /* Should never happen */
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+ }
+ peer_pk = &ssl->session_negotiate->peer_cert->pk;
+#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
+ /*
+ * Now write it out, encrypted
+ */
+ if( ! mbedtls_pk_can_do( peer_pk, MBEDTLS_PK_RSA ) )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate key type mismatch" ) );
+ return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
+ }
+
+ if( ( ret = mbedtls_pk_encrypt( peer_pk,
+ p, ssl->handshake->pmslen,
+ ssl->out_msg + offset + len_bytes, olen,
+ MBEDTLS_SSL_OUT_CONTENT_LEN - offset - len_bytes,
+ ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_rsa_pkcs1_encrypt", ret );
+ return( ret );
+ }
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
+ defined(MBEDTLS_SSL_PROTO_TLS1_2)
+ if( len_bytes == 2 )
+ {
+ ssl->out_msg[offset+0] = (unsigned char)( *olen >> 8 );
+ ssl->out_msg[offset+1] = (unsigned char)( *olen );
+ *olen += 2;
+ }
+#endif
+
+#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+ /* We don't need the peer's public key anymore. Free it. */
+ mbedtls_pk_free( peer_pk );
+#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+ return( 0 );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
+
+/*
+ * CLIENT HANDSHAKE STATE: Outgoing `CertificateVerify`
+ */
+
#if !defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
static int ssl_write_certificate_verify( mbedtls_ssl_context *ssl )
{
@@ -3789,6 +4053,16 @@
}
#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
+/*
+ * CLIENT HANDSHAKE STATE: Outgoing `Finished`
+ *
+ * This is shared with the server-side and implemented in ssl_12_gen.c.
+ */
+
+/*
+ * CLIENT HANDSHAKE STATE: Incoming `NewSessionTicket`
+ */
+
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
static int ssl_parse_new_session_ticket( mbedtls_ssl_context *ssl )
{
@@ -3905,139 +4179,9 @@
#endif /* MBEDTLS_SSL_SESSION_TICKETS */
/*
- * SSL handshake -- client side -- single step
+ * CLIENT HANDSHAKE IN: Finished
+ *
+ * This is shared with the server-side and implemented in ssl_12_gen.c.
*/
-int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl )
-{
- int ret = 0;
- if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "client state: %d", ssl->state ) );
-
- if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
- return( ret );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
- {
- if( ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
- return( ret );
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- /* Change state now, so that it is right in mbedtls_ssl_read_record(), used
- * by DTLS for dropping out-of-sequence ChangeCipherSpec records */
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- if( ssl->state == MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC &&
- ssl->handshake->new_session_ticket != 0 )
- {
- ssl->state = MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET;
- }
-#endif
-
- switch( ssl->state )
- {
- case MBEDTLS_SSL_HELLO_REQUEST:
- ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
- break;
-
- /*
- * ==> ClientHello
- */
- case MBEDTLS_SSL_CLIENT_HELLO:
- ret = ssl_write_client_hello( ssl );
- break;
-
- /*
- * <== ServerHello
- * Certificate
- * ( ServerKeyExchange )
- * ( CertificateRequest )
- * ServerHelloDone
- */
- case MBEDTLS_SSL_SERVER_HELLO:
- ret = ssl_parse_server_hello( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_CERTIFICATE:
- ret = mbedtls_ssl_parse_certificate( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_KEY_EXCHANGE:
- ret = ssl_parse_server_key_exchange( ssl );
- break;
-
- case MBEDTLS_SSL_CERTIFICATE_REQUEST:
- ret = ssl_parse_certificate_request( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_HELLO_DONE:
- ret = ssl_parse_server_hello_done( ssl );
- break;
-
- /*
- * ==> ( Certificate/Alert )
- * ClientKeyExchange
- * ( CertificateVerify )
- * ChangeCipherSpec
- * Finished
- */
- case MBEDTLS_SSL_CLIENT_CERTIFICATE:
- ret = mbedtls_ssl_write_certificate( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_KEY_EXCHANGE:
- ret = ssl_write_client_key_exchange( ssl );
- break;
-
- case MBEDTLS_SSL_CERTIFICATE_VERIFY:
- ret = ssl_write_certificate_verify( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC:
- ret = mbedtls_ssl_write_change_cipher_spec( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_FINISHED:
- ret = mbedtls_ssl_write_finished( ssl );
- break;
-
- /*
- * <== ( NewSessionTicket )
- * ChangeCipherSpec
- * Finished
- */
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- case MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET:
- ret = ssl_parse_new_session_ticket( ssl );
- break;
-#endif
-
- case MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC:
- ret = mbedtls_ssl_parse_change_cipher_spec( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_FINISHED:
- ret = mbedtls_ssl_parse_finished( ssl );
- break;
-
- case MBEDTLS_SSL_FLUSH_BUFFERS:
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
- ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
- break;
-
- case MBEDTLS_SSL_HANDSHAKE_WRAPUP:
- mbedtls_ssl_handshake_wrapup( ssl );
- break;
-
- default:
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- return( ret );
-}
#endif /* MBEDTLS_SSL_CLI_C */
diff --git a/library/ssl_12_gen.c b/library/ssl_12_gen.c
index ab9cb89..af54bbe 100644
--- a/library/ssl_12_gen.c
+++ b/library/ssl_12_gen.c
@@ -1,5 +1,6 @@
/*
- * SSLv3/TLSv1 shared functions
+ * Shared handshake reading/writing functions
+ * for TLS versions <= 1.2.
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
@@ -18,14 +19,6 @@
*
* This file is part of mbed TLS (https://tls.mbed.org)
*/
-/*
- * The SSL 3.0 specification was drafted by Netscape in 1996,
- * and became an IETF standard in 1999.
- *
- * http://wp.netscape.com/eng/ssl3/
- * http://www.ietf.org/rfc/rfc2246.txt
- * http://www.ietf.org/rfc/rfc4346.txt
- */
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
@@ -33,8 +26,6 @@
#include MBEDTLS_CONFIG_FILE
#endif
-#if defined(MBEDTLS_SSL_TLS_C)
-
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
@@ -43,6 +34,8 @@
#define mbedtls_free free
#endif
+#if defined(MBEDTLS_SSL_TLS_C)
+
#include "mbedtls/ssl.h"
#include "mbedtls/ssl_internal.h"
#include "mbedtls/debug.h"
@@ -61,1992 +54,12 @@
#include "mbedtls/oid.h"
#endif
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-/* Top-level Connection ID API */
-
-int mbedtls_ssl_conf_cid( mbedtls_ssl_config *conf,
- size_t len,
- int ignore_other_cid )
-{
- if( len > MBEDTLS_SSL_CID_IN_LEN_MAX )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( ignore_other_cid != MBEDTLS_SSL_UNEXPECTED_CID_FAIL &&
- ignore_other_cid != MBEDTLS_SSL_UNEXPECTED_CID_IGNORE )
- {
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- conf->ignore_unexpected_cid = ignore_other_cid;
- conf->cid_len = len;
- return( 0 );
-}
-
-int mbedtls_ssl_set_cid( mbedtls_ssl_context *ssl,
- int enable,
- unsigned char const *own_cid,
- size_t own_cid_len )
-{
- if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ssl->negotiate_cid = enable;
- if( enable == MBEDTLS_SSL_CID_DISABLED )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Disable use of CID extension." ) );
- return( 0 );
- }
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Enable use of CID extension." ) );
- MBEDTLS_SSL_DEBUG_BUF( 3, "Own CID", own_cid, own_cid_len );
-
- if( own_cid_len != ssl->conf->cid_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "CID length %u does not match CID length %u in config",
- (unsigned) own_cid_len,
- (unsigned) ssl->conf->cid_len ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- memcpy( ssl->own_cid, own_cid, own_cid_len );
- /* Truncation is not an issue here because
- * MBEDTLS_SSL_CID_IN_LEN_MAX at most 255. */
- ssl->own_cid_len = (uint8_t) own_cid_len;
-
- return( 0 );
-}
-
-int mbedtls_ssl_get_peer_cid( mbedtls_ssl_context *ssl,
- int *enabled,
- unsigned char peer_cid[ MBEDTLS_SSL_CID_OUT_LEN_MAX ],
- size_t *peer_cid_len )
-{
- *enabled = MBEDTLS_SSL_CID_DISABLED;
-
- if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ||
- ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
- {
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- /* We report MBEDTLS_SSL_CID_DISABLED in case the CID extensions
- * were used, but client and server requested the empty CID.
- * This is indistinguishable from not using the CID extension
- * in the first place. */
- if( ssl->transform_in->in_cid_len == 0 &&
- ssl->transform_in->out_cid_len == 0 )
- {
- return( 0 );
- }
-
- if( peer_cid_len != NULL )
- {
- *peer_cid_len = ssl->transform_in->out_cid_len;
- if( peer_cid != NULL )
- {
- memcpy( peer_cid, ssl->transform_in->out_cid,
- ssl->transform_in->out_cid_len );
- }
- }
-
- *enabled = MBEDTLS_SSL_CID_ENABLED;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
/*
- * Convert max_fragment_length codes to length.
- * RFC 6066 says:
- * enum{
- * 2^9(1), 2^10(2), 2^11(3), 2^12(4), (255)
- * } MaxFragmentLength;
- * and we add 0 -> extension unused
+ * HANDSHAKE STATE: Outgoing `Certificate`
*/
-static unsigned int ssl_mfl_code_to_length( int mfl )
-{
- switch( mfl )
- {
- case MBEDTLS_SSL_MAX_FRAG_LEN_NONE:
- return ( MBEDTLS_TLS_EXT_ADV_CONTENT_LEN );
- case MBEDTLS_SSL_MAX_FRAG_LEN_512:
- return 512;
- case MBEDTLS_SSL_MAX_FRAG_LEN_1024:
- return 1024;
- case MBEDTLS_SSL_MAX_FRAG_LEN_2048:
- return 2048;
- case MBEDTLS_SSL_MAX_FRAG_LEN_4096:
- return 4096;
- default:
- return ( MBEDTLS_TLS_EXT_ADV_CONTENT_LEN );
- }
-}
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-int mbedtls_ssl_session_copy( mbedtls_ssl_session *dst,
- const mbedtls_ssl_session *src )
-{
- mbedtls_ssl_session_free( dst );
- memcpy( dst, src, sizeof( mbedtls_ssl_session ) );
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- if( src->peer_cert != NULL )
- {
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- dst->peer_cert = mbedtls_calloc( 1, sizeof(mbedtls_x509_crt) );
- if( dst->peer_cert == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- mbedtls_x509_crt_init( dst->peer_cert );
-
- if( ( ret = mbedtls_x509_crt_parse_der( dst->peer_cert, src->peer_cert->raw.p,
- src->peer_cert->raw.len ) ) != 0 )
- {
- mbedtls_free( dst->peer_cert );
- dst->peer_cert = NULL;
- return( ret );
- }
- }
-#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( src->peer_cert_digest != NULL )
- {
- dst->peer_cert_digest =
- mbedtls_calloc( 1, src->peer_cert_digest_len );
- if( dst->peer_cert_digest == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- memcpy( dst->peer_cert_digest, src->peer_cert_digest,
- src->peer_cert_digest_len );
- dst->peer_cert_digest_type = src->peer_cert_digest_type;
- dst->peer_cert_digest_len = src->peer_cert_digest_len;
- }
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
- if( src->ticket != NULL )
- {
- dst->ticket = mbedtls_calloc( 1, src->ticket_len );
- if( dst->ticket == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- memcpy( dst->ticket, src->ticket, src->ticket_len );
- }
-#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
-
- return( 0 );
-}
-
-/*
- * Key material generation
- */
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
-static int ssl3_prf( const unsigned char *secret, size_t slen,
- const char *label,
- const unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
-{
- int ret = 0;
- size_t i;
- mbedtls_md5_context md5;
- mbedtls_sha1_context sha1;
- unsigned char padding[16];
- unsigned char sha1sum[20];
- ((void)label);
-
- mbedtls_md5_init( &md5 );
- mbedtls_sha1_init( &sha1 );
-
- /*
- * SSLv3:
- * block =
- * MD5( secret + SHA1( 'A' + secret + random ) ) +
- * MD5( secret + SHA1( 'BB' + secret + random ) ) +
- * MD5( secret + SHA1( 'CCC' + secret + random ) ) +
- * ...
- */
- for( i = 0; i < dlen / 16; i++ )
- {
- memset( padding, (unsigned char) ('A' + i), 1 + i );
-
- if( ( ret = mbedtls_sha1_starts_ret( &sha1 ) ) != 0 )
- goto exit;
- if( ( ret = mbedtls_sha1_update_ret( &sha1, padding, 1 + i ) ) != 0 )
- goto exit;
- if( ( ret = mbedtls_sha1_update_ret( &sha1, secret, slen ) ) != 0 )
- goto exit;
- if( ( ret = mbedtls_sha1_update_ret( &sha1, random, rlen ) ) != 0 )
- goto exit;
- if( ( ret = mbedtls_sha1_finish_ret( &sha1, sha1sum ) ) != 0 )
- goto exit;
-
- if( ( ret = mbedtls_md5_starts_ret( &md5 ) ) != 0 )
- goto exit;
- if( ( ret = mbedtls_md5_update_ret( &md5, secret, slen ) ) != 0 )
- goto exit;
- if( ( ret = mbedtls_md5_update_ret( &md5, sha1sum, 20 ) ) != 0 )
- goto exit;
- if( ( ret = mbedtls_md5_finish_ret( &md5, dstbuf + i * 16 ) ) != 0 )
- goto exit;
- }
-
-exit:
- mbedtls_md5_free( &md5 );
- mbedtls_sha1_free( &sha1 );
-
- mbedtls_platform_zeroize( padding, sizeof( padding ) );
- mbedtls_platform_zeroize( sha1sum, sizeof( sha1sum ) );
-
- return( ret );
-}
-#endif /* MBEDTLS_SSL_PROTO_SSL3 */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
-static int tls1_prf( const unsigned char *secret, size_t slen,
- const char *label,
- const unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
-{
- size_t nb, hs;
- size_t i, j, k;
- const unsigned char *S1, *S2;
- unsigned char *tmp;
- size_t tmp_len = 0;
- unsigned char h_i[20];
- const mbedtls_md_info_t *md_info;
- mbedtls_md_context_t md_ctx;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- mbedtls_md_init( &md_ctx );
-
- tmp_len = 20 + strlen( label ) + rlen;
- tmp = mbedtls_calloc( 1, tmp_len );
- if( tmp == NULL )
- {
- ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
- goto exit;
- }
-
- hs = ( slen + 1 ) / 2;
- S1 = secret;
- S2 = secret + slen - hs;
-
- nb = strlen( label );
- memcpy( tmp + 20, label, nb );
- memcpy( tmp + 20 + nb, random, rlen );
- nb += rlen;
-
- /*
- * First compute P_md5(secret,label+random)[0..dlen]
- */
- if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_MD5 ) ) == NULL )
- {
- ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
- goto exit;
- }
-
- if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
- {
- goto exit;
- }
-
- mbedtls_md_hmac_starts( &md_ctx, S1, hs );
- mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb );
- mbedtls_md_hmac_finish( &md_ctx, 4 + tmp );
-
- for( i = 0; i < dlen; i += 16 )
- {
- mbedtls_md_hmac_reset ( &md_ctx );
- mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 + nb );
- mbedtls_md_hmac_finish( &md_ctx, h_i );
-
- mbedtls_md_hmac_reset ( &md_ctx );
- mbedtls_md_hmac_update( &md_ctx, 4 + tmp, 16 );
- mbedtls_md_hmac_finish( &md_ctx, 4 + tmp );
-
- k = ( i + 16 > dlen ) ? dlen % 16 : 16;
-
- for( j = 0; j < k; j++ )
- dstbuf[i + j] = h_i[j];
- }
-
- mbedtls_md_free( &md_ctx );
-
- /*
- * XOR out with P_sha1(secret,label+random)[0..dlen]
- */
- if( ( md_info = mbedtls_md_info_from_type( MBEDTLS_MD_SHA1 ) ) == NULL )
- {
- ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
- goto exit;
- }
-
- if( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
- {
- goto exit;
- }
-
- mbedtls_md_hmac_starts( &md_ctx, S2, hs );
- mbedtls_md_hmac_update( &md_ctx, tmp + 20, nb );
- mbedtls_md_hmac_finish( &md_ctx, tmp );
-
- for( i = 0; i < dlen; i += 20 )
- {
- mbedtls_md_hmac_reset ( &md_ctx );
- mbedtls_md_hmac_update( &md_ctx, tmp, 20 + nb );
- mbedtls_md_hmac_finish( &md_ctx, h_i );
-
- mbedtls_md_hmac_reset ( &md_ctx );
- mbedtls_md_hmac_update( &md_ctx, tmp, 20 );
- mbedtls_md_hmac_finish( &md_ctx, tmp );
-
- k = ( i + 20 > dlen ) ? dlen % 20 : 20;
-
- for( j = 0; j < k; j++ )
- dstbuf[i + j] = (unsigned char)( dstbuf[i + j] ^ h_i[j] );
- }
-
-exit:
- mbedtls_md_free( &md_ctx );
-
- mbedtls_platform_zeroize( tmp, tmp_len );
- mbedtls_platform_zeroize( h_i, sizeof( h_i ) );
-
- mbedtls_free( tmp );
- return( ret );
-}
-#endif /* MBEDTLS_SSL_PROTO_TLS1) || MBEDTLS_SSL_PROTO_TLS1_1 */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-
-static psa_status_t setup_psa_key_derivation( psa_key_derivation_operation_t* derivation,
- psa_key_handle_t slot,
- psa_algorithm_t alg,
- const unsigned char* seed, size_t seed_length,
- const unsigned char* label, size_t label_length,
- size_t capacity )
-{
- psa_status_t status;
-
- status = psa_key_derivation_setup( derivation, alg );
- if( status != PSA_SUCCESS )
- return( status );
-
- if( PSA_ALG_IS_TLS12_PRF( alg ) || PSA_ALG_IS_TLS12_PSK_TO_MS( alg ) )
- {
- status = psa_key_derivation_input_bytes( derivation,
- PSA_KEY_DERIVATION_INPUT_SEED,
- seed, seed_length );
- if( status != PSA_SUCCESS )
- return( status );
-
- if( slot == 0 )
- {
- status = psa_key_derivation_input_bytes(
- derivation, PSA_KEY_DERIVATION_INPUT_SECRET,
- NULL, 0 );
- }
- else
- {
- status = psa_key_derivation_input_key(
- derivation, PSA_KEY_DERIVATION_INPUT_SECRET,
- slot );
- }
- if( status != PSA_SUCCESS )
- return( status );
-
- status = psa_key_derivation_input_bytes( derivation,
- PSA_KEY_DERIVATION_INPUT_LABEL,
- label, label_length );
- if( status != PSA_SUCCESS )
- return( status );
- }
- else
- {
- return( PSA_ERROR_NOT_SUPPORTED );
- }
-
- status = psa_key_derivation_set_capacity( derivation, capacity );
- if( status != PSA_SUCCESS )
- return( status );
-
- return( PSA_SUCCESS );
-}
-
-static int tls_prf_generic( mbedtls_md_type_t md_type,
- const unsigned char *secret, size_t slen,
- const char *label,
- const unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
-{
- psa_status_t status;
- psa_algorithm_t alg;
- psa_key_handle_t master_slot = 0;
- psa_key_derivation_operation_t derivation =
- PSA_KEY_DERIVATION_OPERATION_INIT;
-
- if( md_type == MBEDTLS_MD_SHA384 )
- alg = PSA_ALG_TLS12_PRF(PSA_ALG_SHA_384);
- else
- alg = PSA_ALG_TLS12_PRF(PSA_ALG_SHA_256);
-
- /* Normally a "secret" should be long enough to be impossible to
- * find by brute force, and in particular should not be empty. But
- * this PRF is also used to derive an IV, in particular in EAP-TLS,
- * and for this use case it makes sense to have a 0-length "secret".
- * Since the key API doesn't allow importing a key of length 0,
- * keep master_slot=0, which setup_psa_key_derivation() understands
- * to mean a 0-length "secret" input. */
- if( slen != 0 )
- {
- psa_key_attributes_t key_attributes = psa_key_attributes_init();
- psa_set_key_usage_flags( &key_attributes, PSA_KEY_USAGE_DERIVE );
- psa_set_key_algorithm( &key_attributes, alg );
- psa_set_key_type( &key_attributes, PSA_KEY_TYPE_DERIVE );
-
- status = psa_import_key( &key_attributes, secret, slen, &master_slot );
- if( status != PSA_SUCCESS )
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
-
- status = setup_psa_key_derivation( &derivation,
- master_slot, alg,
- random, rlen,
- (unsigned char const *) label,
- (size_t) strlen( label ),
- dlen );
- if( status != PSA_SUCCESS )
- {
- psa_key_derivation_abort( &derivation );
- psa_destroy_key( master_slot );
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
-
- status = psa_key_derivation_output_bytes( &derivation, dstbuf, dlen );
- if( status != PSA_SUCCESS )
- {
- psa_key_derivation_abort( &derivation );
- psa_destroy_key( master_slot );
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
-
- status = psa_key_derivation_abort( &derivation );
- if( status != PSA_SUCCESS )
- {
- psa_destroy_key( master_slot );
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
-
- if( master_slot != 0 )
- status = psa_destroy_key( master_slot );
- if( status != PSA_SUCCESS )
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
-
- return( 0 );
-}
-
-#else /* MBEDTLS_USE_PSA_CRYPTO */
-
-static int tls_prf_generic( mbedtls_md_type_t md_type,
- const unsigned char *secret, size_t slen,
- const char *label,
- const unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
-{
- size_t nb;
- size_t i, j, k, md_len;
- unsigned char *tmp;
- size_t tmp_len = 0;
- unsigned char h_i[MBEDTLS_MD_MAX_SIZE];
- const mbedtls_md_info_t *md_info;
- mbedtls_md_context_t md_ctx;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- mbedtls_md_init( &md_ctx );
-
- if( ( md_info = mbedtls_md_info_from_type( md_type ) ) == NULL )
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-
- md_len = mbedtls_md_get_size( md_info );
-
- tmp_len = md_len + strlen( label ) + rlen;
- tmp = mbedtls_calloc( 1, tmp_len );
- if( tmp == NULL )
- {
- ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
- goto exit;
- }
-
- nb = strlen( label );
- memcpy( tmp + md_len, label, nb );
- memcpy( tmp + md_len + nb, random, rlen );
- nb += rlen;
-
- /*
- * Compute P_<hash>(secret, label + random)[0..dlen]
- */
- if ( ( ret = mbedtls_md_setup( &md_ctx, md_info, 1 ) ) != 0 )
- goto exit;
-
- mbedtls_md_hmac_starts( &md_ctx, secret, slen );
- mbedtls_md_hmac_update( &md_ctx, tmp + md_len, nb );
- mbedtls_md_hmac_finish( &md_ctx, tmp );
-
- for( i = 0; i < dlen; i += md_len )
- {
- mbedtls_md_hmac_reset ( &md_ctx );
- mbedtls_md_hmac_update( &md_ctx, tmp, md_len + nb );
- mbedtls_md_hmac_finish( &md_ctx, h_i );
-
- mbedtls_md_hmac_reset ( &md_ctx );
- mbedtls_md_hmac_update( &md_ctx, tmp, md_len );
- mbedtls_md_hmac_finish( &md_ctx, tmp );
-
- k = ( i + md_len > dlen ) ? dlen % md_len : md_len;
-
- for( j = 0; j < k; j++ )
- dstbuf[i + j] = h_i[j];
- }
-
-exit:
- mbedtls_md_free( &md_ctx );
-
- mbedtls_platform_zeroize( tmp, tmp_len );
- mbedtls_platform_zeroize( h_i, sizeof( h_i ) );
-
- mbedtls_free( tmp );
-
- return( ret );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-#if defined(MBEDTLS_SHA256_C)
-static int tls_prf_sha256( const unsigned char *secret, size_t slen,
- const char *label,
- const unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
-{
- return( tls_prf_generic( MBEDTLS_MD_SHA256, secret, slen,
- label, random, rlen, dstbuf, dlen ) );
-}
-#endif /* MBEDTLS_SHA256_C */
-
-#if defined(MBEDTLS_SHA512_C)
-static int tls_prf_sha384( const unsigned char *secret, size_t slen,
- const char *label,
- const unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
-{
- return( tls_prf_generic( MBEDTLS_MD_SHA384, secret, slen,
- label, random, rlen, dstbuf, dlen ) );
-}
-#endif /* MBEDTLS_SHA512_C */
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
-static void ssl_update_checksum_start( mbedtls_ssl_context *, const unsigned char *, size_t );
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
-static void ssl_update_checksum_md5sha1( mbedtls_ssl_context *, const unsigned char *, size_t );
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
-static void ssl_calc_verify_ssl( const mbedtls_ssl_context *, unsigned char *, size_t * );
-static void ssl_calc_finished_ssl( mbedtls_ssl_context *, unsigned char *, int );
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
-static void ssl_calc_verify_tls( const mbedtls_ssl_context *, unsigned char *, size_t * );
-static void ssl_calc_finished_tls( mbedtls_ssl_context *, unsigned char *, int );
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA256_C)
-static void ssl_update_checksum_sha256( mbedtls_ssl_context *, const unsigned char *, size_t );
-static void ssl_calc_verify_tls_sha256( const mbedtls_ssl_context *,unsigned char *, size_t * );
-static void ssl_calc_finished_tls_sha256( mbedtls_ssl_context *,unsigned char *, int );
-#endif
-
-#if defined(MBEDTLS_SHA512_C)
-static void ssl_update_checksum_sha384( mbedtls_ssl_context *, const unsigned char *, size_t );
-static void ssl_calc_verify_tls_sha384( const mbedtls_ssl_context *, unsigned char *, size_t * );
-static void ssl_calc_finished_tls_sha384( mbedtls_ssl_context *, unsigned char *, int );
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED) && \
- defined(MBEDTLS_USE_PSA_CRYPTO)
-static int ssl_use_opaque_psk( mbedtls_ssl_context const *ssl )
-{
- if( ssl->conf->f_psk != NULL )
- {
- /* If we've used a callback to select the PSK,
- * the static configuration is irrelevant. */
- if( ssl->handshake->psk_opaque != 0 )
- return( 1 );
-
- return( 0 );
- }
-
- if( ssl->conf->psk_opaque != 0 )
- return( 1 );
-
- return( 0 );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO &&
- MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
-
-#if defined(MBEDTLS_SSL_EXPORT_KEYS)
-static mbedtls_tls_prf_types tls_prf_get_type( mbedtls_ssl_tls_prf_cb *tls_prf )
-{
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- if( tls_prf == ssl3_prf )
- {
- return( MBEDTLS_SSL_TLS_PRF_SSL3 );
- }
- else
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
- if( tls_prf == tls1_prf )
- {
- return( MBEDTLS_SSL_TLS_PRF_TLS1 );
- }
- else
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA512_C)
- if( tls_prf == tls_prf_sha384 )
- {
- return( MBEDTLS_SSL_TLS_PRF_SHA384 );
- }
- else
-#endif
-#if defined(MBEDTLS_SHA256_C)
- if( tls_prf == tls_prf_sha256 )
- {
- return( MBEDTLS_SSL_TLS_PRF_SHA256 );
- }
- else
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
- return( MBEDTLS_SSL_TLS_PRF_NONE );
-}
-#endif /* MBEDTLS_SSL_EXPORT_KEYS */
-
-int mbedtls_ssl_tls_prf( const mbedtls_tls_prf_types prf,
- const unsigned char *secret, size_t slen,
- const char *label,
- const unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen )
-{
- mbedtls_ssl_tls_prf_cb *tls_prf = NULL;
-
- switch( prf )
- {
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- case MBEDTLS_SSL_TLS_PRF_SSL3:
- tls_prf = ssl3_prf;
- break;
-#endif /* MBEDTLS_SSL_PROTO_SSL3 */
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
- case MBEDTLS_SSL_TLS_PRF_TLS1:
- tls_prf = tls1_prf;
- break;
-#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA512_C)
- case MBEDTLS_SSL_TLS_PRF_SHA384:
- tls_prf = tls_prf_sha384;
- break;
-#endif /* MBEDTLS_SHA512_C */
-#if defined(MBEDTLS_SHA256_C)
- case MBEDTLS_SSL_TLS_PRF_SHA256:
- tls_prf = tls_prf_sha256;
- break;
-#endif /* MBEDTLS_SHA256_C */
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
- default:
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
- }
-
- return( tls_prf( secret, slen, label, random, rlen, dstbuf, dlen ) );
-}
-
-/* Type for the TLS PRF */
-typedef int ssl_tls_prf_t(const unsigned char *, size_t, const char *,
- const unsigned char *, size_t,
- unsigned char *, size_t);
-
-/*
- * Populate a transform structure with session keys and all the other
- * necessary information.
- *
- * Parameters:
- * - [in/out]: transform: structure to populate
- * [in] must be just initialised with mbedtls_ssl_transform_init()
- * [out] fully populated, ready for use by mbedtls_ssl_{en,de}crypt_buf()
- * - [in] ciphersuite
- * - [in] master
- * - [in] encrypt_then_mac
- * - [in] trunc_hmac
- * - [in] compression
- * - [in] tls_prf: pointer to PRF to use for key derivation
- * - [in] randbytes: buffer holding ServerHello.random + ClientHello.random
- * - [in] minor_ver: SSL/TLS minor version
- * - [in] endpoint: client or server
- * - [in] ssl: optionally used for:
- * - MBEDTLS_SSL_HW_RECORD_ACCEL: whole context
- * - MBEDTLS_SSL_EXPORT_KEYS: ssl->conf->{f,p}_export_keys
- * - MBEDTLS_DEBUG_C: ssl->conf->{f,p}_dbg
- */
-static int ssl_populate_transform( mbedtls_ssl_transform *transform,
- int ciphersuite,
- const unsigned char master[48],
-#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- int encrypt_then_mac,
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- int trunc_hmac,
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- int compression,
-#endif
- ssl_tls_prf_t tls_prf,
- const unsigned char randbytes[64],
- int minor_ver,
- unsigned endpoint,
- const mbedtls_ssl_context *ssl )
-{
- int ret = 0;
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- int psa_fallthrough;
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
- unsigned char keyblk[256];
- unsigned char *key1;
- unsigned char *key2;
- unsigned char *mac_enc;
- unsigned char *mac_dec;
- size_t mac_key_len;
- size_t iv_copy_len;
- unsigned keylen;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
- const mbedtls_cipher_info_t *cipher_info;
- const mbedtls_md_info_t *md_info;
-
-#if !defined(MBEDTLS_SSL_HW_RECORD_ACCEL) && \
- !defined(MBEDTLS_SSL_EXPORT_KEYS) && \
- !defined(MBEDTLS_DEBUG_C)
- ssl = NULL; /* make sure we don't use it except for those cases */
- (void) ssl;
-#endif
-
- /*
- * Some data just needs copying into the structure
- */
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC) && \
- defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
- transform->encrypt_then_mac = encrypt_then_mac;
-#endif
- transform->minor_ver = minor_ver;
-
-#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
- memcpy( transform->randbytes, randbytes, sizeof( transform->randbytes ) );
-#endif
-
- /*
- * Get various info structures
- */
- ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( ciphersuite );
- if( ciphersuite_info == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "ciphersuite info for %d not found",
- ciphersuite ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- cipher_info = mbedtls_cipher_info_from_type( ciphersuite_info->cipher );
- if( cipher_info == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "cipher info for %d not found",
- ciphersuite_info->cipher ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- md_info = mbedtls_md_info_from_type( ciphersuite_info->mac );
- if( md_info == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "mbedtls_md info for %d not found",
- ciphersuite_info->mac ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
- /* Copy own and peer's CID if the use of the CID
- * extension has been negotiated. */
- if( ssl->handshake->cid_in_use == MBEDTLS_SSL_CID_ENABLED )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Copy CIDs into SSL transform" ) );
-
- transform->in_cid_len = ssl->own_cid_len;
- memcpy( transform->in_cid, ssl->own_cid, ssl->own_cid_len );
- MBEDTLS_SSL_DEBUG_BUF( 3, "Incoming CID", transform->in_cid,
- transform->in_cid_len );
-
- transform->out_cid_len = ssl->handshake->peer_cid_len;
- memcpy( transform->out_cid, ssl->handshake->peer_cid,
- ssl->handshake->peer_cid_len );
- MBEDTLS_SSL_DEBUG_BUF( 3, "Outgoing CID", transform->out_cid,
- transform->out_cid_len );
- }
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
- /*
- * Compute key block using the PRF
- */
- ret = tls_prf( master, 48, "key expansion", randbytes, 64, keyblk, 256 );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite = %s",
- mbedtls_ssl_get_ciphersuite_name( ciphersuite ) ) );
- MBEDTLS_SSL_DEBUG_BUF( 3, "master secret", master, 48 );
- MBEDTLS_SSL_DEBUG_BUF( 4, "random bytes", randbytes, 64 );
- MBEDTLS_SSL_DEBUG_BUF( 4, "key block", keyblk, 256 );
-
- /*
- * Determine the appropriate key, IV and MAC length.
- */
-
- keylen = cipher_info->key_bitlen / 8;
-
-#if defined(MBEDTLS_GCM_C) || \
- defined(MBEDTLS_CCM_C) || \
- defined(MBEDTLS_CHACHAPOLY_C)
- if( cipher_info->mode == MBEDTLS_MODE_GCM ||
- cipher_info->mode == MBEDTLS_MODE_CCM ||
- cipher_info->mode == MBEDTLS_MODE_CHACHAPOLY )
- {
- size_t explicit_ivlen;
-
- transform->maclen = 0;
- mac_key_len = 0;
- transform->taglen =
- ciphersuite_info->flags & MBEDTLS_CIPHERSUITE_SHORT_TAG ? 8 : 16;
-
- /* All modes haves 96-bit IVs;
- * GCM and CCM has 4 implicit and 8 explicit bytes
- * ChachaPoly has all 12 bytes implicit
- */
- transform->ivlen = 12;
- if( cipher_info->mode == MBEDTLS_MODE_CHACHAPOLY )
- transform->fixed_ivlen = 12;
- else
- transform->fixed_ivlen = 4;
-
- /* Minimum length of encrypted record */
- explicit_ivlen = transform->ivlen - transform->fixed_ivlen;
- transform->minlen = explicit_ivlen + transform->taglen;
- }
- else
-#endif /* MBEDTLS_GCM_C || MBEDTLS_CCM_C || MBEDTLS_CHACHAPOLY_C */
-#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
- if( cipher_info->mode == MBEDTLS_MODE_STREAM ||
- cipher_info->mode == MBEDTLS_MODE_CBC )
- {
- /* Initialize HMAC contexts */
- if( ( ret = mbedtls_md_setup( &transform->md_ctx_enc, md_info, 1 ) ) != 0 ||
- ( ret = mbedtls_md_setup( &transform->md_ctx_dec, md_info, 1 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_setup", ret );
- goto end;
- }
-
- /* Get MAC length */
- mac_key_len = mbedtls_md_get_size( md_info );
- transform->maclen = mac_key_len;
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- /*
- * If HMAC is to be truncated, we shall keep the leftmost bytes,
- * (rfc 6066 page 13 or rfc 2104 section 4),
- * so we only need to adjust the length here.
- */
- if( trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_ENABLED )
- {
- transform->maclen = MBEDTLS_SSL_TRUNCATED_HMAC_LEN;
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT)
- /* Fall back to old, non-compliant version of the truncated
- * HMAC implementation which also truncates the key
- * (Mbed TLS versions from 1.3 to 2.6.0) */
- mac_key_len = transform->maclen;
-#endif
- }
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
- /* IV length */
- transform->ivlen = cipher_info->iv_size;
-
- /* Minimum length */
- if( cipher_info->mode == MBEDTLS_MODE_STREAM )
- transform->minlen = transform->maclen;
- else
- {
- /*
- * GenericBlockCipher:
- * 1. if EtM is in use: one block plus MAC
- * otherwise: * first multiple of blocklen greater than maclen
- * 2. IV except for SSL3 and TLS 1.0
- */
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- if( encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED )
- {
- transform->minlen = transform->maclen
- + cipher_info->block_size;
- }
- else
-#endif
- {
- transform->minlen = transform->maclen
- + cipher_info->block_size
- - transform->maclen % cipher_info->block_size;
- }
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1)
- if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
- minor_ver == MBEDTLS_SSL_MINOR_VERSION_1 )
- ; /* No need to adjust minlen */
- else
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1_1) || defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_2 ||
- minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- transform->minlen += transform->ivlen;
- }
- else
-#endif
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
- goto end;
- }
- }
- }
- else
-#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "keylen: %u, minlen: %u, ivlen: %u, maclen: %u",
- (unsigned) keylen,
- (unsigned) transform->minlen,
- (unsigned) transform->ivlen,
- (unsigned) transform->maclen ) );
-
- /*
- * Finally setup the cipher contexts, IVs and MAC secrets.
- */
-#if defined(MBEDTLS_SSL_CLI_C)
- if( endpoint == MBEDTLS_SSL_IS_CLIENT )
- {
- key1 = keyblk + mac_key_len * 2;
- key2 = keyblk + mac_key_len * 2 + keylen;
-
- mac_enc = keyblk;
- mac_dec = keyblk + mac_key_len;
-
- /*
- * This is not used in TLS v1.1.
- */
- iv_copy_len = ( transform->fixed_ivlen ) ?
- transform->fixed_ivlen : transform->ivlen;
- memcpy( transform->iv_enc, key2 + keylen, iv_copy_len );
- memcpy( transform->iv_dec, key2 + keylen + iv_copy_len,
- iv_copy_len );
- }
- else
-#endif /* MBEDTLS_SSL_CLI_C */
-#if defined(MBEDTLS_SSL_SRV_C)
- if( endpoint == MBEDTLS_SSL_IS_SERVER )
- {
- key1 = keyblk + mac_key_len * 2 + keylen;
- key2 = keyblk + mac_key_len * 2;
-
- mac_enc = keyblk + mac_key_len;
- mac_dec = keyblk;
-
- /*
- * This is not used in TLS v1.1.
- */
- iv_copy_len = ( transform->fixed_ivlen ) ?
- transform->fixed_ivlen : transform->ivlen;
- memcpy( transform->iv_dec, key1 + keylen, iv_copy_len );
- memcpy( transform->iv_enc, key1 + keylen + iv_copy_len,
- iv_copy_len );
- }
- else
-#endif /* MBEDTLS_SSL_SRV_C */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
- goto end;
- }
-
-#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- if( mac_key_len > sizeof( transform->mac_enc ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
- goto end;
- }
-
- memcpy( transform->mac_enc, mac_enc, mac_key_len );
- memcpy( transform->mac_dec, mac_dec, mac_key_len );
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_SSL3 */
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( minor_ver >= MBEDTLS_SSL_MINOR_VERSION_1 )
- {
- /* For HMAC-based ciphersuites, initialize the HMAC transforms.
- For AEAD-based ciphersuites, there is nothing to do here. */
- if( mac_key_len != 0 )
- {
- mbedtls_md_hmac_starts( &transform->md_ctx_enc, mac_enc, mac_key_len );
- mbedtls_md_hmac_starts( &transform->md_ctx_dec, mac_dec, mac_key_len );
- }
- }
- else
-#endif
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- ret = MBEDTLS_ERR_SSL_INTERNAL_ERROR;
- goto end;
- }
-#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */
-
-#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
- if( mbedtls_ssl_hw_record_init != NULL )
- {
- int ret = 0;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_init()" ) );
-
- if( ( ret = mbedtls_ssl_hw_record_init( ssl, key1, key2, keylen,
- transform->iv_enc, transform->iv_dec,
- iv_copy_len,
- mac_enc, mac_dec,
- mac_key_len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_init", ret );
- ret = MBEDTLS_ERR_SSL_HW_ACCEL_FAILED;
- goto end;
- }
- }
-#else
- ((void) mac_dec);
- ((void) mac_enc);
-#endif /* MBEDTLS_SSL_HW_RECORD_ACCEL */
-
-#if defined(MBEDTLS_SSL_EXPORT_KEYS)
- if( ssl->conf->f_export_keys != NULL )
- {
- ssl->conf->f_export_keys( ssl->conf->p_export_keys,
- master, keyblk,
- mac_key_len, keylen,
- iv_copy_len );
- }
-
- if( ssl->conf->f_export_keys_ext != NULL )
- {
- ssl->conf->f_export_keys_ext( ssl->conf->p_export_keys,
- master, keyblk,
- mac_key_len, keylen,
- iv_copy_len,
- randbytes + 32,
- randbytes,
- tls_prf_get_type( tls_prf ) );
- }
-#endif
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-
- /* Only use PSA-based ciphers for TLS-1.2.
- * That's relevant at least for TLS-1.0, where
- * we assume that mbedtls_cipher_crypt() updates
- * the structure field for the IV, which the PSA-based
- * implementation currently doesn't. */
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- ret = mbedtls_cipher_setup_psa( &transform->cipher_ctx_enc,
- cipher_info, transform->taglen );
- if( ret != 0 && ret != MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup_psa", ret );
- goto end;
- }
-
- if( ret == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Successfully setup PSA-based encryption cipher context" ) );
- psa_fallthrough = 0;
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Failed to setup PSA-based cipher context for record encryption - fall through to default setup." ) );
- psa_fallthrough = 1;
- }
- }
- else
- psa_fallthrough = 1;
-#else
- psa_fallthrough = 1;
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
- if( psa_fallthrough == 1 )
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
- if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_enc,
- cipher_info ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret );
- goto end;
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Only use PSA-based ciphers for TLS-1.2.
- * That's relevant at least for TLS-1.0, where
- * we assume that mbedtls_cipher_crypt() updates
- * the structure field for the IV, which the PSA-based
- * implementation currently doesn't. */
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- ret = mbedtls_cipher_setup_psa( &transform->cipher_ctx_dec,
- cipher_info, transform->taglen );
- if( ret != 0 && ret != MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup_psa", ret );
- goto end;
- }
-
- if( ret == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Successfully setup PSA-based decryption cipher context" ) );
- psa_fallthrough = 0;
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Failed to setup PSA-based cipher context for record decryption - fall through to default setup." ) );
- psa_fallthrough = 1;
- }
- }
- else
- psa_fallthrough = 1;
-#else
- psa_fallthrough = 1;
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
- if( psa_fallthrough == 1 )
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
- if( ( ret = mbedtls_cipher_setup( &transform->cipher_ctx_dec,
- cipher_info ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setup", ret );
- goto end;
- }
-
- if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_enc, key1,
- cipher_info->key_bitlen,
- MBEDTLS_ENCRYPT ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret );
- goto end;
- }
-
- if( ( ret = mbedtls_cipher_setkey( &transform->cipher_ctx_dec, key2,
- cipher_info->key_bitlen,
- MBEDTLS_DECRYPT ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_setkey", ret );
- goto end;
- }
-
-#if defined(MBEDTLS_CIPHER_MODE_CBC)
- if( cipher_info->mode == MBEDTLS_MODE_CBC )
- {
- if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_enc,
- MBEDTLS_PADDING_NONE ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret );
- goto end;
- }
-
- if( ( ret = mbedtls_cipher_set_padding_mode( &transform->cipher_ctx_dec,
- MBEDTLS_PADDING_NONE ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_cipher_set_padding_mode", ret );
- goto end;
- }
- }
-#endif /* MBEDTLS_CIPHER_MODE_CBC */
-
-
- /* Initialize Zlib contexts */
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- if( compression == MBEDTLS_SSL_COMPRESS_DEFLATE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Initializing zlib states" ) );
-
- memset( &transform->ctx_deflate, 0, sizeof( transform->ctx_deflate ) );
- memset( &transform->ctx_inflate, 0, sizeof( transform->ctx_inflate ) );
-
- if( deflateInit( &transform->ctx_deflate,
- Z_DEFAULT_COMPRESSION ) != Z_OK ||
- inflateInit( &transform->ctx_inflate ) != Z_OK )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Failed to initialize compression" ) );
- ret = MBEDTLS_ERR_SSL_COMPRESSION_FAILED;
- goto end;
- }
- }
-#endif /* MBEDTLS_ZLIB_SUPPORT */
-
-end:
- mbedtls_platform_zeroize( keyblk, sizeof( keyblk ) );
- return( ret );
-}
-
-/*
- * Set appropriate PRF function and other SSL / TLS 1.0/1.1 / TLS1.2 functions
- *
- * Inputs:
- * - SSL/TLS minor version
- * - hash associated with the ciphersuite (only used by TLS 1.2)
- *
- * Outputs:
- * - the tls_prf, calc_verify and calc_finished members of handshake structure
- */
-static int ssl_set_handshake_prfs( mbedtls_ssl_handshake_params *handshake,
- int minor_ver,
- mbedtls_md_type_t hash )
-{
-#if !defined(MBEDTLS_SSL_PROTO_TLS1_2) || !defined(MBEDTLS_SHA512_C)
- (void) hash;
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- handshake->tls_prf = ssl3_prf;
- handshake->calc_verify = ssl_calc_verify_ssl;
- handshake->calc_finished = ssl_calc_finished_ssl;
- }
- else
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
- if( minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- handshake->tls_prf = tls1_prf;
- handshake->calc_verify = ssl_calc_verify_tls;
- handshake->calc_finished = ssl_calc_finished_tls;
- }
- else
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA512_C)
- if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 &&
- hash == MBEDTLS_MD_SHA384 )
- {
- handshake->tls_prf = tls_prf_sha384;
- handshake->calc_verify = ssl_calc_verify_tls_sha384;
- handshake->calc_finished = ssl_calc_finished_tls_sha384;
- }
- else
-#endif
-#if defined(MBEDTLS_SHA256_C)
- if( minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- handshake->tls_prf = tls_prf_sha256;
- handshake->calc_verify = ssl_calc_verify_tls_sha256;
- handshake->calc_finished = ssl_calc_finished_tls_sha256;
- }
- else
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
- {
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- return( 0 );
-}
-
-/*
- * Compute master secret if needed
- *
- * Parameters:
- * [in/out] handshake
- * [in] resume, premaster, extended_ms, calc_verify, tls_prf
- * (PSA-PSK) ciphersuite_info, psk_opaque
- * [out] premaster (cleared)
- * [out] master
- * [in] ssl: optionally used for debugging, EMS and PSA-PSK
- * debug: conf->f_dbg, conf->p_dbg
- * EMS: passed to calc_verify (debug + (SSL3) session_negotiate)
- * PSA-PSA: minor_ver, conf
- */
-static int ssl_compute_master( mbedtls_ssl_handshake_params *handshake,
- unsigned char *master,
- const mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- /* cf. RFC 5246, Section 8.1:
- * "The master secret is always exactly 48 bytes in length." */
- size_t const master_secret_len = 48;
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
- unsigned char session_hash[48];
-#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-
- /* The label for the KDF used for key expansion.
- * This is either "master secret" or "extended master secret"
- * depending on whether the Extended Master Secret extension
- * is used. */
- char const *lbl = "master secret";
-
- /* The salt for the KDF used for key expansion.
- * - If the Extended Master Secret extension is not used,
- * this is ClientHello.Random + ServerHello.Random
- * (see Sect. 8.1 in RFC 5246).
- * - If the Extended Master Secret extension is used,
- * this is the transcript of the handshake so far.
- * (see Sect. 4 in RFC 7627). */
- unsigned char const *salt = handshake->randbytes;
- size_t salt_len = 64;
-
-#if !defined(MBEDTLS_DEBUG_C) && \
- !defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET) && \
- !(defined(MBEDTLS_USE_PSA_CRYPTO) && \
- defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED))
- ssl = NULL; /* make sure we don't use it except for those cases */
- (void) ssl;
-#endif
-
- if( handshake->resume != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "no premaster (session resumed)" ) );
- return( 0 );
- }
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
- if( handshake->extended_ms == MBEDTLS_SSL_EXTENDED_MS_ENABLED )
- {
- lbl = "extended master secret";
- salt = session_hash;
- handshake->calc_verify( ssl, session_hash, &salt_len );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "session hash for extended master secret",
- session_hash, salt_len );
- }
-#endif /* MBEDTLS_SSL_EXTENDED_MS_ENABLED */
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO) && \
- defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
- if( handshake->ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK &&
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 &&
- ssl_use_opaque_psk( ssl ) == 1 )
- {
- /* Perform PSK-to-MS expansion in a single step. */
- psa_status_t status;
- psa_algorithm_t alg;
- psa_key_handle_t psk;
- psa_key_derivation_operation_t derivation =
- PSA_KEY_DERIVATION_OPERATION_INIT;
- mbedtls_md_type_t hash_alg = handshake->ciphersuite_info->mac;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "perform PSA-based PSK-to-MS expansion" ) );
-
- psk = ssl->conf->psk_opaque;
- if( handshake->psk_opaque != 0 )
- psk = handshake->psk_opaque;
-
- if( hash_alg == MBEDTLS_MD_SHA384 )
- alg = PSA_ALG_TLS12_PSK_TO_MS(PSA_ALG_SHA_384);
- else
- alg = PSA_ALG_TLS12_PSK_TO_MS(PSA_ALG_SHA_256);
-
- status = setup_psa_key_derivation( &derivation, psk, alg,
- salt, salt_len,
- (unsigned char const *) lbl,
- (size_t) strlen( lbl ),
- master_secret_len );
- if( status != PSA_SUCCESS )
- {
- psa_key_derivation_abort( &derivation );
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
-
- status = psa_key_derivation_output_bytes( &derivation,
- master,
- master_secret_len );
- if( status != PSA_SUCCESS )
- {
- psa_key_derivation_abort( &derivation );
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
-
- status = psa_key_derivation_abort( &derivation );
- if( status != PSA_SUCCESS )
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
- else
-#endif
- {
- ret = handshake->tls_prf( handshake->premaster, handshake->pmslen,
- lbl, salt, salt_len,
- master,
- master_secret_len );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "prf", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "premaster secret",
- handshake->premaster,
- handshake->pmslen );
-
- mbedtls_platform_zeroize( handshake->premaster,
- sizeof(handshake->premaster) );
- }
-
- return( 0 );
-}
-
-int mbedtls_ssl_derive_keys( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- const mbedtls_ssl_ciphersuite_t * const ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> derive keys" ) );
-
- /* Set PRF, calc_verify and calc_finished function pointers */
- ret = ssl_set_handshake_prfs( ssl->handshake,
- ssl->minor_ver,
- ciphersuite_info->mac );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "ssl_set_handshake_prfs", ret );
- return( ret );
- }
-
- /* Compute master secret if needed */
- ret = ssl_compute_master( ssl->handshake,
- ssl->session_negotiate->master,
- ssl );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "ssl_compute_master", ret );
- return( ret );
- }
-
- /* Swap the client and server random values:
- * - MS derivation wanted client+server (RFC 5246 8.1)
- * - key derivation wants server+client (RFC 5246 6.3) */
- {
- unsigned char tmp[64];
- memcpy( tmp, ssl->handshake->randbytes, 64 );
- memcpy( ssl->handshake->randbytes, tmp + 32, 32 );
- memcpy( ssl->handshake->randbytes + 32, tmp, 32 );
- mbedtls_platform_zeroize( tmp, sizeof( tmp ) );
- }
-
- /* Populate transform structure */
- ret = ssl_populate_transform( ssl->transform_negotiate,
- ssl->session_negotiate->ciphersuite,
- ssl->session_negotiate->master,
-#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- ssl->session_negotiate->encrypt_then_mac,
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- ssl->session_negotiate->trunc_hmac,
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- ssl->session_negotiate->compression,
-#endif
- ssl->handshake->tls_prf,
- ssl->handshake->randbytes,
- ssl->minor_ver,
- ssl->conf->endpoint,
- ssl );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "ssl_populate_transform", ret );
- return( ret );
- }
-
- /* We no longer need Server/ClientHello.random values */
- mbedtls_platform_zeroize( ssl->handshake->randbytes,
- sizeof( ssl->handshake->randbytes ) );
-
- /* Allocate compression buffer */
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- if( ssl->session_negotiate->compression == MBEDTLS_SSL_COMPRESS_DEFLATE &&
- ssl->compress_buf == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Allocating compression buffer" ) );
- ssl->compress_buf = mbedtls_calloc( 1, MBEDTLS_SSL_COMPRESS_BUFFER_LEN );
- if( ssl->compress_buf == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
- MBEDTLS_SSL_COMPRESS_BUFFER_LEN ) );
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
- }
- }
-#endif
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= derive keys" ) );
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
-void ssl_calc_verify_ssl( const mbedtls_ssl_context *ssl,
- unsigned char hash[36],
- size_t *hlen )
-{
- mbedtls_md5_context md5;
- mbedtls_sha1_context sha1;
- unsigned char pad_1[48];
- unsigned char pad_2[48];
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify ssl" ) );
-
- mbedtls_md5_init( &md5 );
- mbedtls_sha1_init( &sha1 );
-
- mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
- mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
-
- memset( pad_1, 0x36, 48 );
- memset( pad_2, 0x5C, 48 );
-
- mbedtls_md5_update_ret( &md5, ssl->session_negotiate->master, 48 );
- mbedtls_md5_update_ret( &md5, pad_1, 48 );
- mbedtls_md5_finish_ret( &md5, hash );
-
- mbedtls_md5_starts_ret( &md5 );
- mbedtls_md5_update_ret( &md5, ssl->session_negotiate->master, 48 );
- mbedtls_md5_update_ret( &md5, pad_2, 48 );
- mbedtls_md5_update_ret( &md5, hash, 16 );
- mbedtls_md5_finish_ret( &md5, hash );
-
- mbedtls_sha1_update_ret( &sha1, ssl->session_negotiate->master, 48 );
- mbedtls_sha1_update_ret( &sha1, pad_1, 40 );
- mbedtls_sha1_finish_ret( &sha1, hash + 16 );
-
- mbedtls_sha1_starts_ret( &sha1 );
- mbedtls_sha1_update_ret( &sha1, ssl->session_negotiate->master, 48 );
- mbedtls_sha1_update_ret( &sha1, pad_2, 40 );
- mbedtls_sha1_update_ret( &sha1, hash + 16, 20 );
- mbedtls_sha1_finish_ret( &sha1, hash + 16 );
-
- *hlen = 36;
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, *hlen );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
-
- mbedtls_md5_free( &md5 );
- mbedtls_sha1_free( &sha1 );
-
- return;
-}
-#endif /* MBEDTLS_SSL_PROTO_SSL3 */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
-void ssl_calc_verify_tls( const mbedtls_ssl_context *ssl,
- unsigned char hash[36],
- size_t *hlen )
-{
- mbedtls_md5_context md5;
- mbedtls_sha1_context sha1;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify tls" ) );
-
- mbedtls_md5_init( &md5 );
- mbedtls_sha1_init( &sha1 );
-
- mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
- mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
-
- mbedtls_md5_finish_ret( &md5, hash );
- mbedtls_sha1_finish_ret( &sha1, hash + 16 );
-
- *hlen = 36;
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, *hlen );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
-
- mbedtls_md5_free( &md5 );
- mbedtls_sha1_free( &sha1 );
-
- return;
-}
-#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA256_C)
-void ssl_calc_verify_tls_sha256( const mbedtls_ssl_context *ssl,
- unsigned char hash[32],
- size_t *hlen )
-{
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- size_t hash_size;
- psa_status_t status;
- psa_hash_operation_t sha256_psa = psa_hash_operation_init();
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> PSA calc verify sha256" ) );
- status = psa_hash_clone( &ssl->handshake->fin_sha256_psa, &sha256_psa );
- if( status != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash clone failed" ) );
- return;
- }
-
- status = psa_hash_finish( &sha256_psa, hash, 32, &hash_size );
- if( status != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash finish failed" ) );
- return;
- }
-
- *hlen = 32;
- MBEDTLS_SSL_DEBUG_BUF( 3, "PSA calculated verify result", hash, *hlen );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= PSA calc verify" ) );
-#else
- mbedtls_sha256_context sha256;
-
- mbedtls_sha256_init( &sha256 );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha256" ) );
-
- mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 );
- mbedtls_sha256_finish_ret( &sha256, hash );
-
- *hlen = 32;
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, *hlen );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
-
- mbedtls_sha256_free( &sha256 );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
- return;
-}
-#endif /* MBEDTLS_SHA256_C */
-
-#if defined(MBEDTLS_SHA512_C)
-void ssl_calc_verify_tls_sha384( const mbedtls_ssl_context *ssl,
- unsigned char hash[48],
- size_t *hlen )
-{
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- size_t hash_size;
- psa_status_t status;
- psa_hash_operation_t sha384_psa = psa_hash_operation_init();
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> PSA calc verify sha384" ) );
- status = psa_hash_clone( &ssl->handshake->fin_sha384_psa, &sha384_psa );
- if( status != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash clone failed" ) );
- return;
- }
-
- status = psa_hash_finish( &sha384_psa, hash, 48, &hash_size );
- if( status != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash finish failed" ) );
- return;
- }
-
- *hlen = 48;
- MBEDTLS_SSL_DEBUG_BUF( 3, "PSA calculated verify result", hash, *hlen );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= PSA calc verify" ) );
-#else
- mbedtls_sha512_context sha512;
-
- mbedtls_sha512_init( &sha512 );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc verify sha384" ) );
-
- mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
- mbedtls_sha512_finish_ret( &sha512, hash );
-
- *hlen = 48;
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "calculated verify result", hash, *hlen );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc verify" ) );
-
- mbedtls_sha512_free( &sha512 );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
- return;
-}
-#endif /* MBEDTLS_SHA512_C */
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-int mbedtls_ssl_psk_derive_premaster( mbedtls_ssl_context *ssl, mbedtls_key_exchange_type_t key_ex )
-{
- unsigned char *p = ssl->handshake->premaster;
- unsigned char *end = p + sizeof( ssl->handshake->premaster );
- const unsigned char *psk = ssl->conf->psk;
- size_t psk_len = ssl->conf->psk_len;
-
- /* If the psk callback was called, use its result */
- if( ssl->handshake->psk != NULL )
- {
- psk = ssl->handshake->psk;
- psk_len = ssl->handshake->psk_len;
- }
-
- /*
- * PMS = struct {
- * opaque other_secret<0..2^16-1>;
- * opaque psk<0..2^16-1>;
- * };
- * with "other_secret" depending on the particular key exchange
- */
-#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
- if( key_ex == MBEDTLS_KEY_EXCHANGE_PSK )
- {
- if( end - p < 2 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- *(p++) = (unsigned char)( psk_len >> 8 );
- *(p++) = (unsigned char)( psk_len );
-
- if( end < p || (size_t)( end - p ) < psk_len )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- memset( p, 0, psk_len );
- p += psk_len;
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
- if( key_ex == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
- {
- /*
- * other_secret already set by the ClientKeyExchange message,
- * and is 48 bytes long
- */
- if( end - p < 2 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- *p++ = 0;
- *p++ = 48;
- p += 48;
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
- if( key_ex == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
- {
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t len;
-
- /* Write length only when we know the actual value */
- if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
- p + 2, end - ( p + 2 ), &len,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
- return( ret );
- }
- *(p++) = (unsigned char)( len >> 8 );
- *(p++) = (unsigned char)( len );
- p += len;
-
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
- if( key_ex == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
- {
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t zlen;
-
- if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx, &zlen,
- p + 2, end - ( p + 2 ),
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret );
- return( ret );
- }
-
- *(p++) = (unsigned char)( zlen >> 8 );
- *(p++) = (unsigned char)( zlen );
- p += zlen;
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_Z );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- /* opaque psk<0..2^16-1>; */
- if( end - p < 2 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- *(p++) = (unsigned char)( psk_len >> 8 );
- *(p++) = (unsigned char)( psk_len );
-
- if( end < p || (size_t)( end - p ) < psk_len )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- memcpy( p, psk, psk_len );
- p += psk_len;
-
- ssl->handshake->pmslen = p - ssl->handshake->premaster;
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
-/*
- * SSLv3.0 MAC functions
- */
-#define SSL_MAC_MAX_BYTES 20 /* MD-5 or SHA-1 */
-static void ssl_mac( mbedtls_md_context_t *md_ctx,
- const unsigned char *secret,
- const unsigned char *buf, size_t len,
- const unsigned char *ctr, int type,
- unsigned char out[SSL_MAC_MAX_BYTES] )
-{
- unsigned char header[11];
- unsigned char padding[48];
- int padlen;
- int md_size = mbedtls_md_get_size( md_ctx->md_info );
- int md_type = mbedtls_md_get_type( md_ctx->md_info );
-
- /* Only MD5 and SHA-1 supported */
- if( md_type == MBEDTLS_MD_MD5 )
- padlen = 48;
- else
- padlen = 40;
-
- memcpy( header, ctr, 8 );
- header[ 8] = (unsigned char) type;
- header[ 9] = (unsigned char)( len >> 8 );
- header[10] = (unsigned char)( len );
-
- memset( padding, 0x36, padlen );
- mbedtls_md_starts( md_ctx );
- mbedtls_md_update( md_ctx, secret, md_size );
- mbedtls_md_update( md_ctx, padding, padlen );
- mbedtls_md_update( md_ctx, header, 11 );
- mbedtls_md_update( md_ctx, buf, len );
- mbedtls_md_finish( md_ctx, out );
-
- memset( padding, 0x5C, padlen );
- mbedtls_md_starts( md_ctx );
- mbedtls_md_update( md_ctx, secret, md_size );
- mbedtls_md_update( md_ctx, padding, padlen );
- mbedtls_md_update( md_ctx, out, md_size );
- mbedtls_md_finish( md_ctx, out );
-}
-#endif /* MBEDTLS_SSL_PROTO_SSL3 */
-
-#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
-static int ssl_write_hello_request( mbedtls_ssl_context *ssl );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
-int mbedtls_ssl_resend_hello_request( mbedtls_ssl_context *ssl )
-{
- /* If renegotiation is not enforced, retransmit until we would reach max
- * timeout if we were using the usual handshake doubling scheme */
- if( ssl->conf->renego_max_records < 0 )
- {
- uint32_t ratio = ssl->conf->hs_timeout_max / ssl->conf->hs_timeout_min + 1;
- unsigned char doublings = 1;
-
- while( ratio != 0 )
- {
- ++doublings;
- ratio >>= 1;
- }
-
- if( ++ssl->renego_records_seen > doublings )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "no longer retransmitting hello request" ) );
- return( 0 );
- }
- }
-
- return( ssl_write_hello_request( ssl ) );
-}
-#endif
-#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-static void ssl_clear_peer_cert( mbedtls_ssl_session *session )
-{
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- if( session->peer_cert != NULL )
- {
- mbedtls_x509_crt_free( session->peer_cert );
- mbedtls_free( session->peer_cert );
- session->peer_cert = NULL;
- }
-#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( session->peer_cert_digest != NULL )
- {
- /* Zeroization is not necessary. */
- mbedtls_free( session->peer_cert_digest );
- session->peer_cert_digest = NULL;
- session->peer_cert_digest_type = MBEDTLS_MD_NONE;
- session->peer_cert_digest_len = 0;
- }
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-}
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-/*
- * Handshake functions
- */
#if !defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-/* No certificate support -> dummy functions */
+
int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
{
const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
@@ -2065,26 +78,7 @@
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
-int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
-
- if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
- ssl->state++;
- return( 0 );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-}
-
#else /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-/* Some certificate support -> implement write and parse */
int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
{
@@ -2199,6 +193,212 @@
return( ret );
}
+#endif /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
+
+/*
+ * HANDSHAKE STATE: Incoming `Certificate`
+ */
+
+#if !defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+
+int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
+{
+ const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+ ssl->handshake->ciphersuite_info;
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
+
+ if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
+ ssl->state++;
+ return( 0 );
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+}
+
+#else /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
+
+/* Check if a certificate message is expected.
+ * Return either
+ * - SSL_CERTIFICATE_EXPECTED, or
+ * - SSL_CERTIFICATE_SKIP
+ * indicating whether a Certificate message is expected or not.
+ */
+#define SSL_CERTIFICATE_EXPECTED 0
+#define SSL_CERTIFICATE_SKIP 1
+static int ssl_parse_certificate_coordinate( mbedtls_ssl_context *ssl,
+ int authmode );
+static int ssl_parse_certificate_chain( mbedtls_ssl_context *ssl,
+ mbedtls_x509_crt *chain );
+static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl,
+ int authmode,
+ mbedtls_x509_crt *chain,
+ void *rs_ctx );
+
+#if defined(MBEDTLS_SSL_SRV_C)
+static int ssl_srv_check_client_no_crt_notification( mbedtls_ssl_context *ssl );
+#endif /* MBEDTLS_SSL_SRV_C */
+
+#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+static int ssl_remember_peer_crt_digest( mbedtls_ssl_context *ssl,
+ unsigned char *start, size_t len );
+static int ssl_remember_peer_pubkey( mbedtls_ssl_context *ssl,
+ unsigned char *start, size_t len );
+#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
+int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
+{
+ int ret = 0;
+ int crt_expected;
+#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
+ const int authmode = ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET
+ ? ssl->handshake->sni_authmode
+ : ssl->conf->authmode;
+#else
+ const int authmode = ssl->conf->authmode;
+#endif
+ void *rs_ctx = NULL;
+ mbedtls_x509_crt *chain = NULL;
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
+
+ crt_expected = ssl_parse_certificate_coordinate( ssl, authmode );
+ if( crt_expected == SSL_CERTIFICATE_SKIP )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
+ goto exit;
+ }
+
+#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
+ if( ssl->handshake->ecrs_enabled &&
+ ssl->handshake->ecrs_state == ssl_ecrs_crt_verify )
+ {
+ chain = ssl->handshake->ecrs_peer_cert;
+ ssl->handshake->ecrs_peer_cert = NULL;
+ goto crt_verify;
+ }
+#endif
+
+ if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
+ {
+ /* mbedtls_ssl_read_record may have sent an alert already. We
+ let it decide whether to alert. */
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
+ goto exit;
+ }
+
+#if defined(MBEDTLS_SSL_SRV_C)
+ if( ssl_srv_check_client_no_crt_notification( ssl ) == 0 )
+ {
+ ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
+
+ if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
+ ret = 0;
+ else
+ ret = MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE;
+
+ goto exit;
+ }
+#endif /* MBEDTLS_SSL_SRV_C */
+
+ /* Clear existing peer CRT structure in case we tried to
+ * reuse a session but it failed, and allocate a new one. */
+ mbedtls_ssl_clear_peer_cert( ssl->session_negotiate );
+
+ chain = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) );
+ if( chain == NULL )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
+ sizeof( mbedtls_x509_crt ) ) );
+ mbedtls_ssl_send_alert_message( ssl,
+ MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
+
+ ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
+ goto exit;
+ }
+ mbedtls_x509_crt_init( chain );
+
+ ret = ssl_parse_certificate_chain( ssl, chain );
+ if( ret != 0 )
+ goto exit;
+
+#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
+ if( ssl->handshake->ecrs_enabled)
+ ssl->handshake->ecrs_state = ssl_ecrs_crt_verify;
+
+crt_verify:
+ if( ssl->handshake->ecrs_enabled)
+ rs_ctx = &ssl->handshake->ecrs_ctx;
+#endif
+
+ ret = ssl_parse_certificate_verify( ssl, authmode,
+ chain, rs_ctx );
+ if( ret != 0 )
+ goto exit;
+
+#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+ {
+ unsigned char *crt_start, *pk_start;
+ size_t crt_len, pk_len;
+
+ /* We parse the CRT chain without copying, so
+ * these pointers point into the input buffer,
+ * and are hence still valid after freeing the
+ * CRT chain. */
+
+ crt_start = chain->raw.p;
+ crt_len = chain->raw.len;
+
+ pk_start = chain->pk_raw.p;
+ pk_len = chain->pk_raw.len;
+
+ /* Free the CRT structures before computing
+ * digest and copying the peer's public key. */
+ mbedtls_x509_crt_free( chain );
+ mbedtls_free( chain );
+ chain = NULL;
+
+ ret = ssl_remember_peer_crt_digest( ssl, crt_start, crt_len );
+ if( ret != 0 )
+ goto exit;
+
+ ret = ssl_remember_peer_pubkey( ssl, pk_start, pk_len );
+ if( ret != 0 )
+ goto exit;
+ }
+#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+ /* Pass ownership to session structure. */
+ ssl->session_negotiate->peer_cert = chain;
+ chain = NULL;
+#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );
+
+exit:
+
+ if( ret == 0 )
+ ssl->state++;
+
+#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
+ if( ret == MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS )
+ {
+ ssl->handshake->ecrs_peer_cert = chain;
+ chain = NULL;
+ }
+#endif
+
+ if( chain != NULL )
+ {
+ mbedtls_x509_crt_free( chain );
+ mbedtls_free( chain );
+ }
+
+ return( ret );
+}
#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C)
@@ -2357,7 +557,7 @@
}
/* Now we can safely free the original chain. */
- ssl_clear_peer_cert( ssl->session );
+ mbedtls_ssl_clear_peer_cert( ssl->session );
}
#endif /* MBEDTLS_SSL_RENEGOTIATION && MBEDTLS_SSL_CLI_C */
@@ -2400,6 +600,58 @@
return( 0 );
}
+#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+static int ssl_remember_peer_crt_digest( mbedtls_ssl_context *ssl,
+ unsigned char *start, size_t len )
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ /* Remember digest of the peer's end-CRT. */
+ ssl->session_negotiate->peer_cert_digest =
+ mbedtls_calloc( 1, MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN );
+ if( ssl->session_negotiate->peer_cert_digest == NULL )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
+ MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN ) );
+ mbedtls_ssl_send_alert_message( ssl,
+ MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
+
+ return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
+ }
+
+ ret = mbedtls_md( mbedtls_md_info_from_type(
+ MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE ),
+ start, len,
+ ssl->session_negotiate->peer_cert_digest );
+
+ ssl->session_negotiate->peer_cert_digest_type =
+ MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE;
+ ssl->session_negotiate->peer_cert_digest_len =
+ MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN;
+
+ return( ret );
+}
+
+static int ssl_remember_peer_pubkey( mbedtls_ssl_context *ssl,
+ unsigned char *start, size_t len )
+{
+ unsigned char *end = start + len;
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+
+ /* Make a copy of the peer's raw public key. */
+ mbedtls_pk_init( &ssl->handshake->peer_pubkey );
+ ret = mbedtls_pk_parse_subpubkey( &start, end,
+ &ssl->handshake->peer_pubkey );
+ if( ret != 0 )
+ {
+ /* We should have parsed the public key before. */
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+ }
+
+ return( 0 );
+}
+#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+
#if defined(MBEDTLS_SSL_SRV_C)
static int ssl_srv_check_client_no_crt_notification( mbedtls_ssl_context *ssl )
{
@@ -2442,14 +694,6 @@
}
#endif /* MBEDTLS_SSL_SRV_C */
-/* Check if a certificate message is expected.
- * Return either
- * - SSL_CERTIFICATE_EXPECTED, or
- * - SSL_CERTIFICATE_SKIP
- * indicating whether a Certificate message is expected or not.
- */
-#define SSL_CERTIFICATE_EXPECTED 0
-#define SSL_CERTIFICATE_SKIP 1
static int ssl_parse_certificate_coordinate( mbedtls_ssl_context *ssl,
int authmode )
{
@@ -2666,711 +910,11 @@
return( ret );
}
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
-static int ssl_remember_peer_crt_digest( mbedtls_ssl_context *ssl,
- unsigned char *start, size_t len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- /* Remember digest of the peer's end-CRT. */
- ssl->session_negotiate->peer_cert_digest =
- mbedtls_calloc( 1, MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN );
- if( ssl->session_negotiate->peer_cert_digest == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
- MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN ) );
- mbedtls_ssl_send_alert_message( ssl,
- MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
-
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
- }
-
- ret = mbedtls_md( mbedtls_md_info_from_type(
- MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE ),
- start, len,
- ssl->session_negotiate->peer_cert_digest );
-
- ssl->session_negotiate->peer_cert_digest_type =
- MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE;
- ssl->session_negotiate->peer_cert_digest_len =
- MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN;
-
- return( ret );
-}
-
-static int ssl_remember_peer_pubkey( mbedtls_ssl_context *ssl,
- unsigned char *start, size_t len )
-{
- unsigned char *end = start + len;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- /* Make a copy of the peer's raw public key. */
- mbedtls_pk_init( &ssl->handshake->peer_pubkey );
- ret = mbedtls_pk_parse_subpubkey( &start, end,
- &ssl->handshake->peer_pubkey );
- if( ret != 0 )
- {
- /* We should have parsed the public key before. */
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- return( 0 );
-}
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
-int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
-{
- int ret = 0;
- int crt_expected;
-#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- const int authmode = ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET
- ? ssl->handshake->sni_authmode
- : ssl->conf->authmode;
-#else
- const int authmode = ssl->conf->authmode;
-#endif
- void *rs_ctx = NULL;
- mbedtls_x509_crt *chain = NULL;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
-
- crt_expected = ssl_parse_certificate_coordinate( ssl, authmode );
- if( crt_expected == SSL_CERTIFICATE_SKIP )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
- goto exit;
- }
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled &&
- ssl->handshake->ecrs_state == ssl_ecrs_crt_verify )
- {
- chain = ssl->handshake->ecrs_peer_cert;
- ssl->handshake->ecrs_peer_cert = NULL;
- goto crt_verify;
- }
-#endif
-
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- /* mbedtls_ssl_read_record may have sent an alert already. We
- let it decide whether to alert. */
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- goto exit;
- }
-
-#if defined(MBEDTLS_SSL_SRV_C)
- if( ssl_srv_check_client_no_crt_notification( ssl ) == 0 )
- {
- ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
-
- if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
- ret = 0;
- else
- ret = MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE;
-
- goto exit;
- }
-#endif /* MBEDTLS_SSL_SRV_C */
-
- /* Clear existing peer CRT structure in case we tried to
- * reuse a session but it failed, and allocate a new one. */
- ssl_clear_peer_cert( ssl->session_negotiate );
-
- chain = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) );
- if( chain == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
- sizeof( mbedtls_x509_crt ) ) );
- mbedtls_ssl_send_alert_message( ssl,
- MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
-
- ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
- goto exit;
- }
- mbedtls_x509_crt_init( chain );
-
- ret = ssl_parse_certificate_chain( ssl, chain );
- if( ret != 0 )
- goto exit;
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled)
- ssl->handshake->ecrs_state = ssl_ecrs_crt_verify;
-
-crt_verify:
- if( ssl->handshake->ecrs_enabled)
- rs_ctx = &ssl->handshake->ecrs_ctx;
-#endif
-
- ret = ssl_parse_certificate_verify( ssl, authmode,
- chain, rs_ctx );
- if( ret != 0 )
- goto exit;
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- {
- unsigned char *crt_start, *pk_start;
- size_t crt_len, pk_len;
-
- /* We parse the CRT chain without copying, so
- * these pointers point into the input buffer,
- * and are hence still valid after freeing the
- * CRT chain. */
-
- crt_start = chain->raw.p;
- crt_len = chain->raw.len;
-
- pk_start = chain->pk_raw.p;
- pk_len = chain->pk_raw.len;
-
- /* Free the CRT structures before computing
- * digest and copying the peer's public key. */
- mbedtls_x509_crt_free( chain );
- mbedtls_free( chain );
- chain = NULL;
-
- ret = ssl_remember_peer_crt_digest( ssl, crt_start, crt_len );
- if( ret != 0 )
- goto exit;
-
- ret = ssl_remember_peer_pubkey( ssl, pk_start, pk_len );
- if( ret != 0 )
- goto exit;
- }
-#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- /* Pass ownership to session structure. */
- ssl->session_negotiate->peer_cert = chain;
- chain = NULL;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );
-
-exit:
-
- if( ret == 0 )
- ssl->state++;
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret == MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS )
- {
- ssl->handshake->ecrs_peer_cert = chain;
- chain = NULL;
- }
-#endif
-
- if( chain != NULL )
- {
- mbedtls_x509_crt_free( chain );
- mbedtls_free( chain );
- }
-
- return( ret );
-}
#endif /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-void mbedtls_ssl_optimize_checksum( mbedtls_ssl_context *ssl,
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info )
-{
- ((void) ciphersuite_info);
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
- ssl->handshake->update_checksum = ssl_update_checksum_md5sha1;
- else
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA512_C)
- if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
- ssl->handshake->update_checksum = ssl_update_checksum_sha384;
- else
-#endif
-#if defined(MBEDTLS_SHA256_C)
- if( ciphersuite_info->mac != MBEDTLS_MD_SHA384 )
- ssl->handshake->update_checksum = ssl_update_checksum_sha256;
- else
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return;
- }
-}
-
-void mbedtls_ssl_reset_checksum( mbedtls_ssl_context *ssl )
-{
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- mbedtls_md5_starts_ret( &ssl->handshake->fin_md5 );
- mbedtls_sha1_starts_ret( &ssl->handshake->fin_sha1 );
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA256_C)
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- psa_hash_abort( &ssl->handshake->fin_sha256_psa );
- psa_hash_setup( &ssl->handshake->fin_sha256_psa, PSA_ALG_SHA_256 );
-#else
- mbedtls_sha256_starts_ret( &ssl->handshake->fin_sha256, 0 );
-#endif
-#endif
-#if defined(MBEDTLS_SHA512_C)
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- psa_hash_abort( &ssl->handshake->fin_sha384_psa );
- psa_hash_setup( &ssl->handshake->fin_sha384_psa, PSA_ALG_SHA_384 );
-#else
- mbedtls_sha512_starts_ret( &ssl->handshake->fin_sha512, 1 );
-#endif
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-}
-
-static void ssl_update_checksum_start( mbedtls_ssl_context *ssl,
- const unsigned char *buf, size_t len )
-{
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- mbedtls_md5_update_ret( &ssl->handshake->fin_md5 , buf, len );
- mbedtls_sha1_update_ret( &ssl->handshake->fin_sha1, buf, len );
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA256_C)
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- psa_hash_update( &ssl->handshake->fin_sha256_psa, buf, len );
-#else
- mbedtls_sha256_update_ret( &ssl->handshake->fin_sha256, buf, len );
-#endif
-#endif
-#if defined(MBEDTLS_SHA512_C)
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- psa_hash_update( &ssl->handshake->fin_sha384_psa, buf, len );
-#else
- mbedtls_sha512_update_ret( &ssl->handshake->fin_sha512, buf, len );
-#endif
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-}
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
-static void ssl_update_checksum_md5sha1( mbedtls_ssl_context *ssl,
- const unsigned char *buf, size_t len )
-{
- mbedtls_md5_update_ret( &ssl->handshake->fin_md5 , buf, len );
- mbedtls_sha1_update_ret( &ssl->handshake->fin_sha1, buf, len );
-}
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA256_C)
-static void ssl_update_checksum_sha256( mbedtls_ssl_context *ssl,
- const unsigned char *buf, size_t len )
-{
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- psa_hash_update( &ssl->handshake->fin_sha256_psa, buf, len );
-#else
- mbedtls_sha256_update_ret( &ssl->handshake->fin_sha256, buf, len );
-#endif
-}
-#endif
-
-#if defined(MBEDTLS_SHA512_C)
-static void ssl_update_checksum_sha384( mbedtls_ssl_context *ssl,
- const unsigned char *buf, size_t len )
-{
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- psa_hash_update( &ssl->handshake->fin_sha384_psa, buf, len );
-#else
- mbedtls_sha512_update_ret( &ssl->handshake->fin_sha512, buf, len );
-#endif
-}
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
-static void ssl_calc_finished_ssl(
- mbedtls_ssl_context *ssl, unsigned char *buf, int from )
-{
- const char *sender;
- mbedtls_md5_context md5;
- mbedtls_sha1_context sha1;
-
- unsigned char padbuf[48];
- unsigned char md5sum[16];
- unsigned char sha1sum[20];
-
- mbedtls_ssl_session *session = ssl->session_negotiate;
- if( !session )
- session = ssl->session;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished ssl" ) );
-
- mbedtls_md5_init( &md5 );
- mbedtls_sha1_init( &sha1 );
-
- mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
- mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
-
- /*
- * SSLv3:
- * hash =
- * MD5( master + pad2 +
- * MD5( handshake + sender + master + pad1 ) )
- * + SHA1( master + pad2 +
- * SHA1( handshake + sender + master + pad1 ) )
- */
-
-#if !defined(MBEDTLS_MD5_ALT)
- MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
- md5.state, sizeof( md5.state ) );
-#endif
-
-#if !defined(MBEDTLS_SHA1_ALT)
- MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
- sha1.state, sizeof( sha1.state ) );
-#endif
-
- sender = ( from == MBEDTLS_SSL_IS_CLIENT ) ? "CLNT"
- : "SRVR";
-
- memset( padbuf, 0x36, 48 );
-
- mbedtls_md5_update_ret( &md5, (const unsigned char *) sender, 4 );
- mbedtls_md5_update_ret( &md5, session->master, 48 );
- mbedtls_md5_update_ret( &md5, padbuf, 48 );
- mbedtls_md5_finish_ret( &md5, md5sum );
-
- mbedtls_sha1_update_ret( &sha1, (const unsigned char *) sender, 4 );
- mbedtls_sha1_update_ret( &sha1, session->master, 48 );
- mbedtls_sha1_update_ret( &sha1, padbuf, 40 );
- mbedtls_sha1_finish_ret( &sha1, sha1sum );
-
- memset( padbuf, 0x5C, 48 );
-
- mbedtls_md5_starts_ret( &md5 );
- mbedtls_md5_update_ret( &md5, session->master, 48 );
- mbedtls_md5_update_ret( &md5, padbuf, 48 );
- mbedtls_md5_update_ret( &md5, md5sum, 16 );
- mbedtls_md5_finish_ret( &md5, buf );
-
- mbedtls_sha1_starts_ret( &sha1 );
- mbedtls_sha1_update_ret( &sha1, session->master, 48 );
- mbedtls_sha1_update_ret( &sha1, padbuf , 40 );
- mbedtls_sha1_update_ret( &sha1, sha1sum, 20 );
- mbedtls_sha1_finish_ret( &sha1, buf + 16 );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, 36 );
-
- mbedtls_md5_free( &md5 );
- mbedtls_sha1_free( &sha1 );
-
- mbedtls_platform_zeroize( padbuf, sizeof( padbuf ) );
- mbedtls_platform_zeroize( md5sum, sizeof( md5sum ) );
- mbedtls_platform_zeroize( sha1sum, sizeof( sha1sum ) );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
-}
-#endif /* MBEDTLS_SSL_PROTO_SSL3 */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
-static void ssl_calc_finished_tls(
- mbedtls_ssl_context *ssl, unsigned char *buf, int from )
-{
- int len = 12;
- const char *sender;
- mbedtls_md5_context md5;
- mbedtls_sha1_context sha1;
- unsigned char padbuf[36];
-
- mbedtls_ssl_session *session = ssl->session_negotiate;
- if( !session )
- session = ssl->session;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls" ) );
-
- mbedtls_md5_init( &md5 );
- mbedtls_sha1_init( &sha1 );
-
- mbedtls_md5_clone( &md5, &ssl->handshake->fin_md5 );
- mbedtls_sha1_clone( &sha1, &ssl->handshake->fin_sha1 );
-
- /*
- * TLSv1:
- * hash = PRF( master, finished_label,
- * MD5( handshake ) + SHA1( handshake ) )[0..11]
- */
-
-#if !defined(MBEDTLS_MD5_ALT)
- MBEDTLS_SSL_DEBUG_BUF( 4, "finished md5 state", (unsigned char *)
- md5.state, sizeof( md5.state ) );
-#endif
-
-#if !defined(MBEDTLS_SHA1_ALT)
- MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha1 state", (unsigned char *)
- sha1.state, sizeof( sha1.state ) );
-#endif
-
- sender = ( from == MBEDTLS_SSL_IS_CLIENT )
- ? "client finished"
- : "server finished";
-
- mbedtls_md5_finish_ret( &md5, padbuf );
- mbedtls_sha1_finish_ret( &sha1, padbuf + 16 );
-
- ssl->handshake->tls_prf( session->master, 48, sender,
- padbuf, 36, buf, len );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
-
- mbedtls_md5_free( &md5 );
- mbedtls_sha1_free( &sha1 );
-
- mbedtls_platform_zeroize( padbuf, sizeof( padbuf ) );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
-}
-#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA256_C)
-static void ssl_calc_finished_tls_sha256(
- mbedtls_ssl_context *ssl, unsigned char *buf, int from )
-{
- int len = 12;
- const char *sender;
- unsigned char padbuf[32];
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- size_t hash_size;
- psa_hash_operation_t sha256_psa = PSA_HASH_OPERATION_INIT;
- psa_status_t status;
-#else
- mbedtls_sha256_context sha256;
-#endif
-
- mbedtls_ssl_session *session = ssl->session_negotiate;
- if( !session )
- session = ssl->session;
-
- sender = ( from == MBEDTLS_SSL_IS_CLIENT )
- ? "client finished"
- : "server finished";
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- sha256_psa = psa_hash_operation_init();
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc PSA finished tls sha256" ) );
-
- status = psa_hash_clone( &ssl->handshake->fin_sha256_psa, &sha256_psa );
- if( status != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash clone failed" ) );
- return;
- }
-
- status = psa_hash_finish( &sha256_psa, padbuf, sizeof( padbuf ), &hash_size );
- if( status != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash finish failed" ) );
- return;
- }
- MBEDTLS_SSL_DEBUG_BUF( 3, "PSA calculated padbuf", padbuf, 32 );
-#else
-
- mbedtls_sha256_init( &sha256 );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha256" ) );
-
- mbedtls_sha256_clone( &sha256, &ssl->handshake->fin_sha256 );
-
- /*
- * TLSv1.2:
- * hash = PRF( master, finished_label,
- * Hash( handshake ) )[0.11]
- */
-
-#if !defined(MBEDTLS_SHA256_ALT)
- MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha2 state", (unsigned char *)
- sha256.state, sizeof( sha256.state ) );
-#endif
-
- mbedtls_sha256_finish_ret( &sha256, padbuf );
- mbedtls_sha256_free( &sha256 );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
- ssl->handshake->tls_prf( session->master, 48, sender,
- padbuf, 32, buf, len );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
-
- mbedtls_platform_zeroize( padbuf, sizeof( padbuf ) );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
-}
-#endif /* MBEDTLS_SHA256_C */
-
-#if defined(MBEDTLS_SHA512_C)
-static void ssl_calc_finished_tls_sha384(
- mbedtls_ssl_context *ssl, unsigned char *buf, int from )
-{
- int len = 12;
- const char *sender;
- unsigned char padbuf[48];
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- size_t hash_size;
- psa_hash_operation_t sha384_psa = PSA_HASH_OPERATION_INIT;
- psa_status_t status;
-#else
- mbedtls_sha512_context sha512;
-#endif
-
- mbedtls_ssl_session *session = ssl->session_negotiate;
- if( !session )
- session = ssl->session;
-
- sender = ( from == MBEDTLS_SSL_IS_CLIENT )
- ? "client finished"
- : "server finished";
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- sha384_psa = psa_hash_operation_init();
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc PSA finished tls sha384" ) );
-
- status = psa_hash_clone( &ssl->handshake->fin_sha384_psa, &sha384_psa );
- if( status != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash clone failed" ) );
- return;
- }
-
- status = psa_hash_finish( &sha384_psa, padbuf, sizeof( padbuf ), &hash_size );
- if( status != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "PSA hash finish failed" ) );
- return;
- }
- MBEDTLS_SSL_DEBUG_BUF( 3, "PSA calculated padbuf", padbuf, 48 );
-#else
- mbedtls_sha512_init( &sha512 );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> calc finished tls sha384" ) );
-
- mbedtls_sha512_clone( &sha512, &ssl->handshake->fin_sha512 );
-
- /*
- * TLSv1.2:
- * hash = PRF( master, finished_label,
- * Hash( handshake ) )[0.11]
- */
-
-#if !defined(MBEDTLS_SHA512_ALT)
- MBEDTLS_SSL_DEBUG_BUF( 4, "finished sha512 state", (unsigned char *)
- sha512.state, sizeof( sha512.state ) );
-#endif
-
- mbedtls_sha512_finish_ret( &sha512, padbuf );
- mbedtls_sha512_free( &sha512 );
-#endif
-
- ssl->handshake->tls_prf( session->master, 48, sender,
- padbuf, 48, buf, len );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "calc finished result", buf, len );
-
- mbedtls_platform_zeroize( padbuf, sizeof( padbuf ) );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= calc finished" ) );
-}
-#endif /* MBEDTLS_SHA512_C */
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
-void mbedtls_ssl_handshake_wrapup_free_hs_transform( mbedtls_ssl_context *ssl )
-{
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup: final free" ) );
-
- /*
- * Free our handshake params
- */
- mbedtls_ssl_handshake_free( ssl );
- mbedtls_free( ssl->handshake );
- ssl->handshake = NULL;
-
- /*
- * Free the previous transform and swith in the current one
- */
- if( ssl->transform )
- {
- mbedtls_ssl_transform_free( ssl->transform );
- mbedtls_free( ssl->transform );
- }
- ssl->transform = ssl->transform_negotiate;
- ssl->transform_negotiate = NULL;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup: final free" ) );
-}
-
-void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl )
-{
- int resume = ssl->handshake->resume;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "=> handshake wrapup" ) );
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
- {
- ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_DONE;
- ssl->renego_records_seen = 0;
- }
-#endif
-
- /*
- * Free the previous session and switch in the current one
- */
- if( ssl->session )
- {
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- /* RFC 7366 3.1: keep the EtM state */
- ssl->session_negotiate->encrypt_then_mac =
- ssl->session->encrypt_then_mac;
-#endif
-
- mbedtls_ssl_session_free( ssl->session );
- mbedtls_free( ssl->session );
- }
- ssl->session = ssl->session_negotiate;
- ssl->session_negotiate = NULL;
-
- /*
- * Add cache entry
- */
- if( ssl->conf->f_set_cache != NULL &&
- ssl->session->id_len != 0 &&
- resume == 0 )
- {
- if( ssl->conf->f_set_cache( ssl->conf->p_cache, ssl->session ) != 0 )
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "cache did not store session" ) );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ssl->handshake->flight != NULL )
- {
- /* Cancel handshake timer */
- mbedtls_ssl_set_timer( ssl, 0 );
-
- /* Keep last flight around in case we need to resend it:
- * we need the handshake and transform structures for that */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip freeing handshake and transform" ) );
- }
- else
-#endif
- mbedtls_ssl_handshake_wrapup_free_hs_transform( ssl );
-
- ssl->state++;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup" ) );
-}
+/*
+ * HANDSHAKE STATE: Outgoing `Finished`
+ */
int mbedtls_ssl_write_finished( mbedtls_ssl_context *ssl )
{
@@ -3496,6 +1040,10 @@
#define SSL_MAX_HASH_LEN 12
#endif
+/*
+ * HANDSHAKE STATE: Incoming `Finished`
+ */
+
int mbedtls_ssl_parse_finished( mbedtls_ssl_context *ssl )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
@@ -3575,3831 +1123,4 @@
return( 0 );
}
-static void ssl_handshake_params_init( mbedtls_ssl_handshake_params *handshake )
-{
- memset( handshake, 0, sizeof( mbedtls_ssl_handshake_params ) );
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- mbedtls_md5_init( &handshake->fin_md5 );
- mbedtls_sha1_init( &handshake->fin_sha1 );
- mbedtls_md5_starts_ret( &handshake->fin_md5 );
- mbedtls_sha1_starts_ret( &handshake->fin_sha1 );
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA256_C)
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- handshake->fin_sha256_psa = psa_hash_operation_init();
- psa_hash_setup( &handshake->fin_sha256_psa, PSA_ALG_SHA_256 );
-#else
- mbedtls_sha256_init( &handshake->fin_sha256 );
- mbedtls_sha256_starts_ret( &handshake->fin_sha256, 0 );
-#endif
-#endif
-#if defined(MBEDTLS_SHA512_C)
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- handshake->fin_sha384_psa = psa_hash_operation_init();
- psa_hash_setup( &handshake->fin_sha384_psa, PSA_ALG_SHA_384 );
-#else
- mbedtls_sha512_init( &handshake->fin_sha512 );
- mbedtls_sha512_starts_ret( &handshake->fin_sha512, 1 );
-#endif
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
- handshake->update_checksum = ssl_update_checksum_start;
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- mbedtls_ssl_sig_hash_set_init( &handshake->hash_algs );
-#endif
-
-#if defined(MBEDTLS_DHM_C)
- mbedtls_dhm_init( &handshake->dhm_ctx );
-#endif
-#if defined(MBEDTLS_ECDH_C)
- mbedtls_ecdh_init( &handshake->ecdh_ctx );
-#endif
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- mbedtls_ecjpake_init( &handshake->ecjpake_ctx );
-#if defined(MBEDTLS_SSL_CLI_C)
- handshake->ecjpake_cache = NULL;
- handshake->ecjpake_cache_len = 0;
-#endif
-#endif
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- mbedtls_x509_crt_restart_init( &handshake->ecrs_ctx );
-#endif
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- handshake->sni_authmode = MBEDTLS_SSL_VERIFY_UNSET;
-#endif
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
- !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- mbedtls_pk_init( &handshake->peer_pubkey );
-#endif
-}
-
-void mbedtls_ssl_transform_init( mbedtls_ssl_transform *transform )
-{
- memset( transform, 0, sizeof(mbedtls_ssl_transform) );
-
- mbedtls_cipher_init( &transform->cipher_ctx_enc );
- mbedtls_cipher_init( &transform->cipher_ctx_dec );
-
-#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
- mbedtls_md_init( &transform->md_ctx_enc );
- mbedtls_md_init( &transform->md_ctx_dec );
-#endif
-}
-
-void mbedtls_ssl_session_init( mbedtls_ssl_session *session )
-{
- memset( session, 0, sizeof(mbedtls_ssl_session) );
-}
-
-static int ssl_handshake_init( mbedtls_ssl_context *ssl )
-{
- /* Clear old handshake information if present */
- if( ssl->transform_negotiate )
- mbedtls_ssl_transform_free( ssl->transform_negotiate );
- if( ssl->session_negotiate )
- mbedtls_ssl_session_free( ssl->session_negotiate );
- if( ssl->handshake )
- mbedtls_ssl_handshake_free( ssl );
-
- /*
- * Either the pointers are now NULL or cleared properly and can be freed.
- * Now allocate missing structures.
- */
- if( ssl->transform_negotiate == NULL )
- {
- ssl->transform_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_transform) );
- }
-
- if( ssl->session_negotiate == NULL )
- {
- ssl->session_negotiate = mbedtls_calloc( 1, sizeof(mbedtls_ssl_session) );
- }
-
- if( ssl->handshake == NULL )
- {
- ssl->handshake = mbedtls_calloc( 1, sizeof(mbedtls_ssl_handshake_params) );
- }
-
- /* All pointers should exist and can be directly freed without issue */
- if( ssl->handshake == NULL ||
- ssl->transform_negotiate == NULL ||
- ssl->session_negotiate == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc() of ssl sub-contexts failed" ) );
-
- mbedtls_free( ssl->handshake );
- mbedtls_free( ssl->transform_negotiate );
- mbedtls_free( ssl->session_negotiate );
-
- ssl->handshake = NULL;
- ssl->transform_negotiate = NULL;
- ssl->session_negotiate = NULL;
-
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
- }
-
- /* Initialize structures */
- mbedtls_ssl_session_init( ssl->session_negotiate );
- mbedtls_ssl_transform_init( ssl->transform_negotiate );
- ssl_handshake_params_init( ssl->handshake );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- {
- ssl->handshake->alt_transform_out = ssl->transform_out;
-
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
- ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_PREPARING;
- else
- ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_WAITING;
-
- mbedtls_ssl_set_timer( ssl, 0 );
- }
-#endif
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
-/* Dummy cookie callbacks for defaults */
-static int ssl_cookie_write_dummy( void *ctx,
- unsigned char **p, unsigned char *end,
- const unsigned char *cli_id, size_t cli_id_len )
-{
- ((void) ctx);
- ((void) p);
- ((void) end);
- ((void) cli_id);
- ((void) cli_id_len);
-
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-}
-
-static int ssl_cookie_check_dummy( void *ctx,
- const unsigned char *cookie, size_t cookie_len,
- const unsigned char *cli_id, size_t cli_id_len )
-{
- ((void) ctx);
- ((void) cookie);
- ((void) cookie_len);
- ((void) cli_id);
- ((void) cli_id_len);
-
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-}
-#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY && MBEDTLS_SSL_SRV_C */
-
-/*
- * Initialize an SSL context
- */
-
-void mbedtls_ssl_init( mbedtls_ssl_context *ssl )
-{
- memset( ssl, 0, sizeof( mbedtls_ssl_context ) );
-}
-
-/*
- * Setup an SSL context
- */
-
-int mbedtls_ssl_setup( mbedtls_ssl_context *ssl,
- const mbedtls_ssl_config *conf )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- ssl->conf = conf;
-
- /*
- * Prepare base structures
- */
-
- /* Set to NULL in case of an error condition */
- ssl->out_buf = NULL;
-
- ssl->in_buf = mbedtls_calloc( 1, MBEDTLS_SSL_IN_BUFFER_LEN );
- if( ssl->in_buf == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", MBEDTLS_SSL_IN_BUFFER_LEN) );
- ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
- goto error;
- }
-
- ssl->out_buf = mbedtls_calloc( 1, MBEDTLS_SSL_OUT_BUFFER_LEN );
- if( ssl->out_buf == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", MBEDTLS_SSL_OUT_BUFFER_LEN) );
- ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
- goto error;
- }
-
- mbedtls_ssl_reset_in_out_pointers( ssl );
-
- if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
- goto error;
-
- return( 0 );
-
-error:
- mbedtls_free( ssl->in_buf );
- mbedtls_free( ssl->out_buf );
-
- ssl->conf = NULL;
-
- ssl->in_buf = NULL;
- ssl->out_buf = NULL;
-
- ssl->in_hdr = NULL;
- ssl->in_ctr = NULL;
- ssl->in_len = NULL;
- ssl->in_iv = NULL;
- ssl->in_msg = NULL;
-
- ssl->out_hdr = NULL;
- ssl->out_ctr = NULL;
- ssl->out_len = NULL;
- ssl->out_iv = NULL;
- ssl->out_msg = NULL;
-
- return( ret );
-}
-
-/*
- * Reset an initialized and used SSL context for re-use while retaining
- * all application-set variables, function pointers and data.
- *
- * If partial is non-zero, keep data in the input buffer and client ID.
- * (Use when a DTLS client reconnects from the same port.)
- */
-int mbedtls_ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
-#if !defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) || \
- !defined(MBEDTLS_SSL_SRV_C)
- ((void) partial);
-#endif
-
- ssl->state = MBEDTLS_SSL_HELLO_REQUEST;
-
- /* Cancel any possibly running timer */
- mbedtls_ssl_set_timer( ssl, 0 );
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- ssl->renego_status = MBEDTLS_SSL_INITIAL_HANDSHAKE;
- ssl->renego_records_seen = 0;
-
- ssl->verify_data_len = 0;
- memset( ssl->own_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN );
- memset( ssl->peer_verify_data, 0, MBEDTLS_SSL_VERIFY_DATA_MAX_LEN );
-#endif
- ssl->secure_renegotiation = MBEDTLS_SSL_LEGACY_RENEGOTIATION;
-
- ssl->in_offt = NULL;
- mbedtls_ssl_reset_in_out_pointers( ssl );
-
- ssl->in_msgtype = 0;
- ssl->in_msglen = 0;
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- ssl->next_record_offset = 0;
- ssl->in_epoch = 0;
-#endif
-#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
- mbedtls_ssl_dtls_replay_reset( ssl );
-#endif
-
- ssl->in_hslen = 0;
- ssl->nb_zero = 0;
-
- ssl->keep_current_message = 0;
-
- ssl->out_msgtype = 0;
- ssl->out_msglen = 0;
- ssl->out_left = 0;
-#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
- if( ssl->split_done != MBEDTLS_SSL_CBC_RECORD_SPLITTING_DISABLED )
- ssl->split_done = 0;
-#endif
-
- memset( ssl->cur_out_ctr, 0, sizeof( ssl->cur_out_ctr ) );
-
- ssl->transform_in = NULL;
- ssl->transform_out = NULL;
-
- ssl->session_in = NULL;
- ssl->session_out = NULL;
-
- memset( ssl->out_buf, 0, MBEDTLS_SSL_OUT_BUFFER_LEN );
-
-#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && defined(MBEDTLS_SSL_SRV_C)
- if( partial == 0 )
-#endif /* MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE && MBEDTLS_SSL_SRV_C */
- {
- ssl->in_left = 0;
- memset( ssl->in_buf, 0, MBEDTLS_SSL_IN_BUFFER_LEN );
- }
-
-#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
- if( mbedtls_ssl_hw_record_reset != NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_reset()" ) );
- if( ( ret = mbedtls_ssl_hw_record_reset( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_reset", ret );
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
- }
-#endif
-
- if( ssl->transform )
- {
- mbedtls_ssl_transform_free( ssl->transform );
- mbedtls_free( ssl->transform );
- ssl->transform = NULL;
- }
-
- if( ssl->session )
- {
- mbedtls_ssl_session_free( ssl->session );
- mbedtls_free( ssl->session );
- ssl->session = NULL;
- }
-
-#if defined(MBEDTLS_SSL_ALPN)
- ssl->alpn_chosen = NULL;
-#endif
-
-#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
-#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE)
- if( partial == 0 )
-#endif
- {
- mbedtls_free( ssl->cli_id );
- ssl->cli_id = NULL;
- ssl->cli_id_len = 0;
- }
-#endif
-
- if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
- return( ret );
-
- return( 0 );
-}
-
-/*
- * Reset an initialized and used SSL context for re-use while retaining
- * all application-set variables, function pointers and data.
- */
-int mbedtls_ssl_session_reset( mbedtls_ssl_context *ssl )
-{
- return( mbedtls_ssl_session_reset_int( ssl, 0 ) );
-}
-
-/*
- * SSL set accessors
- */
-void mbedtls_ssl_conf_endpoint( mbedtls_ssl_config *conf, int endpoint )
-{
- conf->endpoint = endpoint;
-}
-
-void mbedtls_ssl_conf_transport( mbedtls_ssl_config *conf, int transport )
-{
- conf->transport = transport;
-}
-
-#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
-void mbedtls_ssl_conf_dtls_anti_replay( mbedtls_ssl_config *conf, char mode )
-{
- conf->anti_replay = mode;
-}
-#endif
-
-#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
-void mbedtls_ssl_conf_dtls_badmac_limit( mbedtls_ssl_config *conf, unsigned limit )
-{
- conf->badmac_limit = limit;
-}
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
-
-void mbedtls_ssl_set_datagram_packing( mbedtls_ssl_context *ssl,
- unsigned allow_packing )
-{
- ssl->disable_datagram_packing = !allow_packing;
-}
-
-void mbedtls_ssl_conf_handshake_timeout( mbedtls_ssl_config *conf,
- uint32_t min, uint32_t max )
-{
- conf->hs_timeout_min = min;
- conf->hs_timeout_max = max;
-}
-#endif
-
-void mbedtls_ssl_conf_authmode( mbedtls_ssl_config *conf, int authmode )
-{
- conf->authmode = authmode;
-}
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-void mbedtls_ssl_conf_verify( mbedtls_ssl_config *conf,
- int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
- void *p_vrfy )
-{
- conf->f_vrfy = f_vrfy;
- conf->p_vrfy = p_vrfy;
-}
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-void mbedtls_ssl_conf_rng( mbedtls_ssl_config *conf,
- int (*f_rng)(void *, unsigned char *, size_t),
- void *p_rng )
-{
- conf->f_rng = f_rng;
- conf->p_rng = p_rng;
-}
-
-void mbedtls_ssl_conf_dbg( mbedtls_ssl_config *conf,
- void (*f_dbg)(void *, int, const char *, int, const char *),
- void *p_dbg )
-{
- conf->f_dbg = f_dbg;
- conf->p_dbg = p_dbg;
-}
-
-void mbedtls_ssl_set_bio( mbedtls_ssl_context *ssl,
- void *p_bio,
- mbedtls_ssl_send_t *f_send,
- mbedtls_ssl_recv_t *f_recv,
- mbedtls_ssl_recv_timeout_t *f_recv_timeout )
-{
- ssl->p_bio = p_bio;
- ssl->f_send = f_send;
- ssl->f_recv = f_recv;
- ssl->f_recv_timeout = f_recv_timeout;
-}
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
-void mbedtls_ssl_set_mtu( mbedtls_ssl_context *ssl, uint16_t mtu )
-{
- ssl->mtu = mtu;
-}
-#endif
-
-void mbedtls_ssl_conf_read_timeout( mbedtls_ssl_config *conf, uint32_t timeout )
-{
- conf->read_timeout = timeout;
-}
-
-void mbedtls_ssl_set_timer_cb( mbedtls_ssl_context *ssl,
- void *p_timer,
- mbedtls_ssl_set_timer_t *f_set_timer,
- mbedtls_ssl_get_timer_t *f_get_timer )
-{
- ssl->p_timer = p_timer;
- ssl->f_set_timer = f_set_timer;
- ssl->f_get_timer = f_get_timer;
-
- /* Make sure we start with no timer running */
- mbedtls_ssl_set_timer( ssl, 0 );
-}
-
-#if defined(MBEDTLS_SSL_SRV_C)
-void mbedtls_ssl_conf_session_cache( mbedtls_ssl_config *conf,
- void *p_cache,
- int (*f_get_cache)(void *, mbedtls_ssl_session *),
- int (*f_set_cache)(void *, const mbedtls_ssl_session *) )
-{
- conf->p_cache = p_cache;
- conf->f_get_cache = f_get_cache;
- conf->f_set_cache = f_set_cache;
-}
-#endif /* MBEDTLS_SSL_SRV_C */
-
-#if defined(MBEDTLS_SSL_CLI_C)
-int mbedtls_ssl_set_session( mbedtls_ssl_context *ssl, const mbedtls_ssl_session *session )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- if( ssl == NULL ||
- session == NULL ||
- ssl->session_negotiate == NULL ||
- ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT )
- {
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- if( ( ret = mbedtls_ssl_session_copy( ssl->session_negotiate,
- session ) ) != 0 )
- return( ret );
-
- ssl->handshake->resume = 1;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_CLI_C */
-
-void mbedtls_ssl_conf_ciphersuites( mbedtls_ssl_config *conf,
- const int *ciphersuites )
-{
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] = ciphersuites;
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] = ciphersuites;
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] = ciphersuites;
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] = ciphersuites;
-}
-
-void mbedtls_ssl_conf_ciphersuites_for_version( mbedtls_ssl_config *conf,
- const int *ciphersuites,
- int major, int minor )
-{
- if( major != MBEDTLS_SSL_MAJOR_VERSION_3 )
- return;
-
- if( minor < MBEDTLS_SSL_MINOR_VERSION_0 || minor > MBEDTLS_SSL_MINOR_VERSION_3 )
- return;
-
- conf->ciphersuite_list[minor] = ciphersuites;
-}
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-void mbedtls_ssl_conf_cert_profile( mbedtls_ssl_config *conf,
- const mbedtls_x509_crt_profile *profile )
-{
- conf->cert_profile = profile;
-}
-
-/* Append a new keycert entry to a (possibly empty) list */
-static int ssl_append_key_cert( mbedtls_ssl_key_cert **head,
- mbedtls_x509_crt *cert,
- mbedtls_pk_context *key )
-{
- mbedtls_ssl_key_cert *new_cert;
-
- new_cert = mbedtls_calloc( 1, sizeof( mbedtls_ssl_key_cert ) );
- if( new_cert == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- new_cert->cert = cert;
- new_cert->key = key;
- new_cert->next = NULL;
-
- /* Update head is the list was null, else add to the end */
- if( *head == NULL )
- {
- *head = new_cert;
- }
- else
- {
- mbedtls_ssl_key_cert *cur = *head;
- while( cur->next != NULL )
- cur = cur->next;
- cur->next = new_cert;
- }
-
- return( 0 );
-}
-
-int mbedtls_ssl_conf_own_cert( mbedtls_ssl_config *conf,
- mbedtls_x509_crt *own_cert,
- mbedtls_pk_context *pk_key )
-{
- return( ssl_append_key_cert( &conf->key_cert, own_cert, pk_key ) );
-}
-
-void mbedtls_ssl_conf_ca_chain( mbedtls_ssl_config *conf,
- mbedtls_x509_crt *ca_chain,
- mbedtls_x509_crl *ca_crl )
-{
- conf->ca_chain = ca_chain;
- conf->ca_crl = ca_crl;
-
-#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
- /* mbedtls_ssl_conf_ca_chain() and mbedtls_ssl_conf_ca_cb()
- * cannot be used together. */
- conf->f_ca_cb = NULL;
- conf->p_ca_cb = NULL;
-#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
-}
-
-#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
-void mbedtls_ssl_conf_ca_cb( mbedtls_ssl_config *conf,
- mbedtls_x509_crt_ca_cb_t f_ca_cb,
- void *p_ca_cb )
-{
- conf->f_ca_cb = f_ca_cb;
- conf->p_ca_cb = p_ca_cb;
-
- /* mbedtls_ssl_conf_ca_chain() and mbedtls_ssl_conf_ca_cb()
- * cannot be used together. */
- conf->ca_chain = NULL;
- conf->ca_crl = NULL;
-}
-#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
-int mbedtls_ssl_set_hs_own_cert( mbedtls_ssl_context *ssl,
- mbedtls_x509_crt *own_cert,
- mbedtls_pk_context *pk_key )
-{
- return( ssl_append_key_cert( &ssl->handshake->sni_key_cert,
- own_cert, pk_key ) );
-}
-
-void mbedtls_ssl_set_hs_ca_chain( mbedtls_ssl_context *ssl,
- mbedtls_x509_crt *ca_chain,
- mbedtls_x509_crl *ca_crl )
-{
- ssl->handshake->sni_ca_chain = ca_chain;
- ssl->handshake->sni_ca_crl = ca_crl;
-}
-
-void mbedtls_ssl_set_hs_authmode( mbedtls_ssl_context *ssl,
- int authmode )
-{
- ssl->handshake->sni_authmode = authmode;
-}
-#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-void mbedtls_ssl_set_verify( mbedtls_ssl_context *ssl,
- int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
- void *p_vrfy )
-{
- ssl->f_vrfy = f_vrfy;
- ssl->p_vrfy = p_vrfy;
-}
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-/*
- * Set EC J-PAKE password for current handshake
- */
-int mbedtls_ssl_set_hs_ecjpake_password( mbedtls_ssl_context *ssl,
- const unsigned char *pw,
- size_t pw_len )
-{
- mbedtls_ecjpake_role role;
-
- if( ssl->handshake == NULL || ssl->conf == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
- role = MBEDTLS_ECJPAKE_SERVER;
- else
- role = MBEDTLS_ECJPAKE_CLIENT;
-
- return( mbedtls_ecjpake_setup( &ssl->handshake->ecjpake_ctx,
- role,
- MBEDTLS_MD_SHA256,
- MBEDTLS_ECP_DP_SECP256R1,
- pw, pw_len ) );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-
-static void ssl_conf_remove_psk( mbedtls_ssl_config *conf )
-{
- /* Remove reference to existing PSK, if any. */
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- if( conf->psk_opaque != 0 )
- {
- /* The maintenance of the PSK key slot is the
- * user's responsibility. */
- conf->psk_opaque = 0;
- }
- /* This and the following branch should never
- * be taken simultaenously as we maintain the
- * invariant that raw and opaque PSKs are never
- * configured simultaneously. As a safeguard,
- * though, `else` is omitted here. */
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
- if( conf->psk != NULL )
- {
- mbedtls_platform_zeroize( conf->psk, conf->psk_len );
-
- mbedtls_free( conf->psk );
- conf->psk = NULL;
- conf->psk_len = 0;
- }
-
- /* Remove reference to PSK identity, if any. */
- if( conf->psk_identity != NULL )
- {
- mbedtls_free( conf->psk_identity );
- conf->psk_identity = NULL;
- conf->psk_identity_len = 0;
- }
-}
-
-/* This function assumes that PSK identity in the SSL config is unset.
- * It checks that the provided identity is well-formed and attempts
- * to make a copy of it in the SSL config.
- * On failure, the PSK identity in the config remains unset. */
-static int ssl_conf_set_psk_identity( mbedtls_ssl_config *conf,
- unsigned char const *psk_identity,
- size_t psk_identity_len )
-{
- /* Identity len will be encoded on two bytes */
- if( psk_identity == NULL ||
- ( psk_identity_len >> 16 ) != 0 ||
- psk_identity_len > MBEDTLS_SSL_OUT_CONTENT_LEN )
- {
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- conf->psk_identity = mbedtls_calloc( 1, psk_identity_len );
- if( conf->psk_identity == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- conf->psk_identity_len = psk_identity_len;
- memcpy( conf->psk_identity, psk_identity, conf->psk_identity_len );
-
- return( 0 );
-}
-
-int mbedtls_ssl_conf_psk( mbedtls_ssl_config *conf,
- const unsigned char *psk, size_t psk_len,
- const unsigned char *psk_identity, size_t psk_identity_len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- /* Remove opaque/raw PSK + PSK Identity */
- ssl_conf_remove_psk( conf );
-
- /* Check and set raw PSK */
- if( psk == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- if( psk_len == 0 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- if( psk_len > MBEDTLS_PSK_MAX_LEN )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( ( conf->psk = mbedtls_calloc( 1, psk_len ) ) == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
- conf->psk_len = psk_len;
- memcpy( conf->psk, psk, conf->psk_len );
-
- /* Check and set PSK Identity */
- ret = ssl_conf_set_psk_identity( conf, psk_identity, psk_identity_len );
- if( ret != 0 )
- ssl_conf_remove_psk( conf );
-
- return( ret );
-}
-
-static void ssl_remove_psk( mbedtls_ssl_context *ssl )
-{
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- if( ssl->handshake->psk_opaque != 0 )
- {
- ssl->handshake->psk_opaque = 0;
- }
- else
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
- if( ssl->handshake->psk != NULL )
- {
- mbedtls_platform_zeroize( ssl->handshake->psk,
- ssl->handshake->psk_len );
- mbedtls_free( ssl->handshake->psk );
- ssl->handshake->psk_len = 0;
- }
-}
-
-int mbedtls_ssl_set_hs_psk( mbedtls_ssl_context *ssl,
- const unsigned char *psk, size_t psk_len )
-{
- if( psk == NULL || ssl->handshake == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( psk_len > MBEDTLS_PSK_MAX_LEN )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ssl_remove_psk( ssl );
-
- if( ( ssl->handshake->psk = mbedtls_calloc( 1, psk_len ) ) == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- ssl->handshake->psk_len = psk_len;
- memcpy( ssl->handshake->psk, psk, ssl->handshake->psk_len );
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-int mbedtls_ssl_conf_psk_opaque( mbedtls_ssl_config *conf,
- psa_key_handle_t psk_slot,
- const unsigned char *psk_identity,
- size_t psk_identity_len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- /* Clear opaque/raw PSK + PSK Identity, if present. */
- ssl_conf_remove_psk( conf );
-
- /* Check and set opaque PSK */
- if( psk_slot == 0 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- conf->psk_opaque = psk_slot;
-
- /* Check and set PSK Identity */
- ret = ssl_conf_set_psk_identity( conf, psk_identity,
- psk_identity_len );
- if( ret != 0 )
- ssl_conf_remove_psk( conf );
-
- return( ret );
-}
-
-int mbedtls_ssl_set_hs_psk_opaque( mbedtls_ssl_context *ssl,
- psa_key_handle_t psk_slot )
-{
- if( psk_slot == 0 || ssl->handshake == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ssl_remove_psk( ssl );
- ssl->handshake->psk_opaque = psk_slot;
- return( 0 );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-void mbedtls_ssl_conf_psk_cb( mbedtls_ssl_config *conf,
- int (*f_psk)(void *, mbedtls_ssl_context *, const unsigned char *,
- size_t),
- void *p_psk )
-{
- conf->f_psk = f_psk;
- conf->p_psk = p_psk;
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
-
-#if !defined(MBEDTLS_DEPRECATED_REMOVED)
-int mbedtls_ssl_conf_dh_param( mbedtls_ssl_config *conf, const char *dhm_P, const char *dhm_G )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- if( ( ret = mbedtls_mpi_read_string( &conf->dhm_P, 16, dhm_P ) ) != 0 ||
- ( ret = mbedtls_mpi_read_string( &conf->dhm_G, 16, dhm_G ) ) != 0 )
- {
- mbedtls_mpi_free( &conf->dhm_P );
- mbedtls_mpi_free( &conf->dhm_G );
- return( ret );
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_DEPRECATED_REMOVED */
-
-int mbedtls_ssl_conf_dh_param_bin( mbedtls_ssl_config *conf,
- const unsigned char *dhm_P, size_t P_len,
- const unsigned char *dhm_G, size_t G_len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- if( ( ret = mbedtls_mpi_read_binary( &conf->dhm_P, dhm_P, P_len ) ) != 0 ||
- ( ret = mbedtls_mpi_read_binary( &conf->dhm_G, dhm_G, G_len ) ) != 0 )
- {
- mbedtls_mpi_free( &conf->dhm_P );
- mbedtls_mpi_free( &conf->dhm_G );
- return( ret );
- }
-
- return( 0 );
-}
-
-int mbedtls_ssl_conf_dh_param_ctx( mbedtls_ssl_config *conf, mbedtls_dhm_context *dhm_ctx )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- if( ( ret = mbedtls_mpi_copy( &conf->dhm_P, &dhm_ctx->P ) ) != 0 ||
- ( ret = mbedtls_mpi_copy( &conf->dhm_G, &dhm_ctx->G ) ) != 0 )
- {
- mbedtls_mpi_free( &conf->dhm_P );
- mbedtls_mpi_free( &conf->dhm_G );
- return( ret );
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_SRV_C */
-
-#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
-/*
- * Set the minimum length for Diffie-Hellman parameters
- */
-void mbedtls_ssl_conf_dhm_min_bitlen( mbedtls_ssl_config *conf,
- unsigned int bitlen )
-{
- conf->dhm_min_bitlen = bitlen;
-}
-#endif /* MBEDTLS_DHM_C && MBEDTLS_SSL_CLI_C */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-/*
- * Set allowed/preferred hashes for handshake signatures
- */
-void mbedtls_ssl_conf_sig_hashes( mbedtls_ssl_config *conf,
- const int *hashes )
-{
- conf->sig_hashes = hashes;
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
-#if defined(MBEDTLS_ECP_C)
-/*
- * Set the allowed elliptic curves
- */
-void mbedtls_ssl_conf_curves( mbedtls_ssl_config *conf,
- const mbedtls_ecp_group_id *curve_list )
-{
- conf->curve_list = curve_list;
-}
-#endif /* MBEDTLS_ECP_C */
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-int mbedtls_ssl_set_hostname( mbedtls_ssl_context *ssl, const char *hostname )
-{
- /* Initialize to suppress unnecessary compiler warning */
- size_t hostname_len = 0;
-
- /* Check if new hostname is valid before
- * making any change to current one */
- if( hostname != NULL )
- {
- hostname_len = strlen( hostname );
-
- if( hostname_len > MBEDTLS_SSL_MAX_HOST_NAME_LEN )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- /* Now it's clear that we will overwrite the old hostname,
- * so we can free it safely */
-
- if( ssl->hostname != NULL )
- {
- mbedtls_platform_zeroize( ssl->hostname, strlen( ssl->hostname ) );
- mbedtls_free( ssl->hostname );
- }
-
- /* Passing NULL as hostname shall clear the old one */
-
- if( hostname == NULL )
- {
- ssl->hostname = NULL;
- }
- else
- {
- ssl->hostname = mbedtls_calloc( 1, hostname_len + 1 );
- if( ssl->hostname == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- memcpy( ssl->hostname, hostname, hostname_len );
-
- ssl->hostname[hostname_len] = '\0';
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
-void mbedtls_ssl_conf_sni( mbedtls_ssl_config *conf,
- int (*f_sni)(void *, mbedtls_ssl_context *,
- const unsigned char *, size_t),
- void *p_sni )
-{
- conf->f_sni = f_sni;
- conf->p_sni = p_sni;
-}
-#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
-
-#if defined(MBEDTLS_SSL_ALPN)
-int mbedtls_ssl_conf_alpn_protocols( mbedtls_ssl_config *conf, const char **protos )
-{
- size_t cur_len, tot_len;
- const char **p;
-
- /*
- * RFC 7301 3.1: "Empty strings MUST NOT be included and byte strings
- * MUST NOT be truncated."
- * We check lengths now rather than later.
- */
- tot_len = 0;
- for( p = protos; *p != NULL; p++ )
- {
- cur_len = strlen( *p );
- tot_len += cur_len;
-
- if( cur_len == 0 || cur_len > 255 || tot_len > 65535 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- conf->alpn_list = protos;
-
- return( 0 );
-}
-
-const char *mbedtls_ssl_get_alpn_protocol( const mbedtls_ssl_context *ssl )
-{
- return( ssl->alpn_chosen );
-}
-#endif /* MBEDTLS_SSL_ALPN */
-
-void mbedtls_ssl_conf_max_version( mbedtls_ssl_config *conf, int major, int minor )
-{
- conf->max_major_ver = major;
- conf->max_minor_ver = minor;
-}
-
-void mbedtls_ssl_conf_min_version( mbedtls_ssl_config *conf, int major, int minor )
-{
- conf->min_major_ver = major;
- conf->min_minor_ver = minor;
-}
-
-#if defined(MBEDTLS_SSL_FALLBACK_SCSV) && defined(MBEDTLS_SSL_CLI_C)
-void mbedtls_ssl_conf_fallback( mbedtls_ssl_config *conf, char fallback )
-{
- conf->fallback = fallback;
-}
-#endif
-
-#if defined(MBEDTLS_SSL_SRV_C)
-void mbedtls_ssl_conf_cert_req_ca_list( mbedtls_ssl_config *conf,
- char cert_req_ca_list )
-{
- conf->cert_req_ca_list = cert_req_ca_list;
-}
-#endif
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-void mbedtls_ssl_conf_encrypt_then_mac( mbedtls_ssl_config *conf, char etm )
-{
- conf->encrypt_then_mac = etm;
-}
-#endif
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
-void mbedtls_ssl_conf_extended_master_secret( mbedtls_ssl_config *conf, char ems )
-{
- conf->extended_ms = ems;
-}
-#endif
-
-#if defined(MBEDTLS_ARC4_C)
-void mbedtls_ssl_conf_arc4_support( mbedtls_ssl_config *conf, char arc4 )
-{
- conf->arc4_disabled = arc4;
-}
-#endif
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-int mbedtls_ssl_conf_max_frag_len( mbedtls_ssl_config *conf, unsigned char mfl_code )
-{
- if( mfl_code >= MBEDTLS_SSL_MAX_FRAG_LEN_INVALID ||
- ssl_mfl_code_to_length( mfl_code ) > MBEDTLS_TLS_EXT_ADV_CONTENT_LEN )
- {
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- conf->mfl_code = mfl_code;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-void mbedtls_ssl_conf_truncated_hmac( mbedtls_ssl_config *conf, int truncate )
-{
- conf->trunc_hmac = truncate;
-}
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
-void mbedtls_ssl_conf_cbc_record_splitting( mbedtls_ssl_config *conf, char split )
-{
- conf->cbc_record_splitting = split;
-}
-#endif
-
-void mbedtls_ssl_conf_legacy_renegotiation( mbedtls_ssl_config *conf, int allow_legacy )
-{
- conf->allow_legacy_renegotiation = allow_legacy;
-}
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
-void mbedtls_ssl_conf_renegotiation( mbedtls_ssl_config *conf, int renegotiation )
-{
- conf->disable_renegotiation = renegotiation;
-}
-
-void mbedtls_ssl_conf_renegotiation_enforced( mbedtls_ssl_config *conf, int max_records )
-{
- conf->renego_max_records = max_records;
-}
-
-void mbedtls_ssl_conf_renegotiation_period( mbedtls_ssl_config *conf,
- const unsigned char period[8] )
-{
- memcpy( conf->renego_period, period, 8 );
-}
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-#if defined(MBEDTLS_SSL_CLI_C)
-void mbedtls_ssl_conf_session_tickets( mbedtls_ssl_config *conf, int use_tickets )
-{
- conf->session_tickets = use_tickets;
-}
-#endif
-
-#if defined(MBEDTLS_SSL_SRV_C)
-void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf,
- mbedtls_ssl_ticket_write_t *f_ticket_write,
- mbedtls_ssl_ticket_parse_t *f_ticket_parse,
- void *p_ticket )
-{
- conf->f_ticket_write = f_ticket_write;
- conf->f_ticket_parse = f_ticket_parse;
- conf->p_ticket = p_ticket;
-}
-#endif
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-#if defined(MBEDTLS_SSL_EXPORT_KEYS)
-void mbedtls_ssl_conf_export_keys_cb( mbedtls_ssl_config *conf,
- mbedtls_ssl_export_keys_t *f_export_keys,
- void *p_export_keys )
-{
- conf->f_export_keys = f_export_keys;
- conf->p_export_keys = p_export_keys;
-}
-
-void mbedtls_ssl_conf_export_keys_ext_cb( mbedtls_ssl_config *conf,
- mbedtls_ssl_export_keys_ext_t *f_export_keys_ext,
- void *p_export_keys )
-{
- conf->f_export_keys_ext = f_export_keys_ext;
- conf->p_export_keys = p_export_keys;
-}
-#endif
-
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
-void mbedtls_ssl_conf_async_private_cb(
- mbedtls_ssl_config *conf,
- mbedtls_ssl_async_sign_t *f_async_sign,
- mbedtls_ssl_async_decrypt_t *f_async_decrypt,
- mbedtls_ssl_async_resume_t *f_async_resume,
- mbedtls_ssl_async_cancel_t *f_async_cancel,
- void *async_config_data )
-{
- conf->f_async_sign_start = f_async_sign;
- conf->f_async_decrypt_start = f_async_decrypt;
- conf->f_async_resume = f_async_resume;
- conf->f_async_cancel = f_async_cancel;
- conf->p_async_config_data = async_config_data;
-}
-
-void *mbedtls_ssl_conf_get_async_config_data( const mbedtls_ssl_config *conf )
-{
- return( conf->p_async_config_data );
-}
-
-void *mbedtls_ssl_get_async_operation_data( const mbedtls_ssl_context *ssl )
-{
- if( ssl->handshake == NULL )
- return( NULL );
- else
- return( ssl->handshake->user_async_ctx );
-}
-
-void mbedtls_ssl_set_async_operation_data( mbedtls_ssl_context *ssl,
- void *ctx )
-{
- if( ssl->handshake != NULL )
- ssl->handshake->user_async_ctx = ctx;
-}
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
-
-uint32_t mbedtls_ssl_get_verify_result( const mbedtls_ssl_context *ssl )
-{
- if( ssl->session != NULL )
- return( ssl->session->verify_result );
-
- if( ssl->session_negotiate != NULL )
- return( ssl->session_negotiate->verify_result );
-
- return( 0xFFFFFFFF );
-}
-
-const char *mbedtls_ssl_get_ciphersuite( const mbedtls_ssl_context *ssl )
-{
- if( ssl == NULL || ssl->session == NULL )
- return( NULL );
-
- return mbedtls_ssl_get_ciphersuite_name( ssl->session->ciphersuite );
-}
-
-const char *mbedtls_ssl_get_version( const mbedtls_ssl_context *ssl )
-{
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- {
- switch( ssl->minor_ver )
- {
- case MBEDTLS_SSL_MINOR_VERSION_2:
- return( "DTLSv1.0" );
-
- case MBEDTLS_SSL_MINOR_VERSION_3:
- return( "DTLSv1.2" );
-
- default:
- return( "unknown (DTLS)" );
- }
- }
-#endif
-
- switch( ssl->minor_ver )
- {
- case MBEDTLS_SSL_MINOR_VERSION_0:
- return( "SSLv3.0" );
-
- case MBEDTLS_SSL_MINOR_VERSION_1:
- return( "TLSv1.0" );
-
- case MBEDTLS_SSL_MINOR_VERSION_2:
- return( "TLSv1.1" );
-
- case MBEDTLS_SSL_MINOR_VERSION_3:
- return( "TLSv1.2" );
-
- default:
- return( "unknown" );
- }
-}
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
-{
- size_t max_len;
-
- /*
- * Assume mfl_code is correct since it was checked when set
- */
- max_len = ssl_mfl_code_to_length( ssl->conf->mfl_code );
-
- /* Check if a smaller max length was negotiated */
- if( ssl->session_out != NULL &&
- ssl_mfl_code_to_length( ssl->session_out->mfl_code ) < max_len )
- {
- max_len = ssl_mfl_code_to_length( ssl->session_out->mfl_code );
- }
-
- /* During a handshake, use the value being negotiated */
- if( ssl->session_negotiate != NULL &&
- ssl_mfl_code_to_length( ssl->session_negotiate->mfl_code ) < max_len )
- {
- max_len = ssl_mfl_code_to_length( ssl->session_negotiate->mfl_code );
- }
-
- return( max_len );
-}
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
-size_t mbedtls_ssl_get_current_mtu( const mbedtls_ssl_context *ssl )
-{
- /* Return unlimited mtu for client hello messages to avoid fragmentation. */
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
- ( ssl->state == MBEDTLS_SSL_CLIENT_HELLO ||
- ssl->state == MBEDTLS_SSL_SERVER_HELLO ) )
- return ( 0 );
-
- if( ssl->handshake == NULL || ssl->handshake->mtu == 0 )
- return( ssl->mtu );
-
- if( ssl->mtu == 0 )
- return( ssl->handshake->mtu );
-
- return( ssl->mtu < ssl->handshake->mtu ?
- ssl->mtu : ssl->handshake->mtu );
-}
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
-int mbedtls_ssl_get_max_out_record_payload( const mbedtls_ssl_context *ssl )
-{
- size_t max_len = MBEDTLS_SSL_OUT_CONTENT_LEN;
-
-#if !defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) && \
- !defined(MBEDTLS_SSL_PROTO_DTLS)
- (void) ssl;
-#endif
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
- const size_t mfl = mbedtls_ssl_get_max_frag_len( ssl );
-
- if( max_len > mfl )
- max_len = mfl;
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( mbedtls_ssl_get_current_mtu( ssl ) != 0 )
- {
- const size_t mtu = mbedtls_ssl_get_current_mtu( ssl );
- const int ret = mbedtls_ssl_get_record_expansion( ssl );
- const size_t overhead = (size_t) ret;
-
- if( ret < 0 )
- return( ret );
-
- if( mtu <= overhead )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "MTU too low for record expansion" ) );
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
- }
-
- if( max_len > mtu - overhead )
- max_len = mtu - overhead;
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
-#if !defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH) && \
- !defined(MBEDTLS_SSL_PROTO_DTLS)
- ((void) ssl);
-#endif
-
- return( (int) max_len );
-}
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-const mbedtls_x509_crt *mbedtls_ssl_get_peer_cert( const mbedtls_ssl_context *ssl )
-{
- if( ssl == NULL || ssl->session == NULL )
- return( NULL );
-
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- return( ssl->session->peer_cert );
-#else
- return( NULL );
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-}
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-#if defined(MBEDTLS_SSL_CLI_C)
-int mbedtls_ssl_get_session( const mbedtls_ssl_context *ssl,
- mbedtls_ssl_session *dst )
-{
- if( ssl == NULL ||
- dst == NULL ||
- ssl->session == NULL ||
- ssl->conf->endpoint != MBEDTLS_SSL_IS_CLIENT )
- {
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- return( mbedtls_ssl_session_copy( dst, ssl->session ) );
-}
-#endif /* MBEDTLS_SSL_CLI_C */
-
-const mbedtls_ssl_session *mbedtls_ssl_get_session_pointer( const mbedtls_ssl_context *ssl )
-{
- if( ssl == NULL )
- return( NULL );
-
- return( ssl->session );
-}
-
-/*
- * Define ticket header determining Mbed TLS version
- * and structure of the ticket.
- */
-
-/*
- * Define bitflag determining compile-time settings influencing
- * structure of serialized SSL sessions.
- */
-
-#if defined(MBEDTLS_HAVE_TIME)
-#define SSL_SERIALIZED_SESSION_CONFIG_TIME 1
-#else
-#define SSL_SERIALIZED_SESSION_CONFIG_TIME 0
-#endif /* MBEDTLS_HAVE_TIME */
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-#define SSL_SERIALIZED_SESSION_CONFIG_CRT 1
-#else
-#define SSL_SERIALIZED_SESSION_CONFIG_CRT 0
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-#if defined(MBEDTLS_SSL_CLI_C) && defined(MBEDTLS_SSL_SESSION_TICKETS)
-#define SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET 1
-#else
-#define SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET 0
-#endif /* MBEDTLS_SSL_CLI_C && MBEDTLS_SSL_SESSION_TICKETS */
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-#define SSL_SERIALIZED_SESSION_CONFIG_MFL 1
-#else
-#define SSL_SERIALIZED_SESSION_CONFIG_MFL 0
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-#define SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC 1
-#else
-#define SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC 0
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-#define SSL_SERIALIZED_SESSION_CONFIG_ETM 1
-#else
-#define SSL_SERIALIZED_SESSION_CONFIG_ETM 0
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-#define SSL_SERIALIZED_SESSION_CONFIG_TICKET 1
-#else
-#define SSL_SERIALIZED_SESSION_CONFIG_TICKET 0
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-#define SSL_SERIALIZED_SESSION_CONFIG_TIME_BIT 0
-#define SSL_SERIALIZED_SESSION_CONFIG_CRT_BIT 1
-#define SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET_BIT 2
-#define SSL_SERIALIZED_SESSION_CONFIG_MFL_BIT 3
-#define SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC_BIT 4
-#define SSL_SERIALIZED_SESSION_CONFIG_ETM_BIT 5
-#define SSL_SERIALIZED_SESSION_CONFIG_TICKET_BIT 6
-
-#define SSL_SERIALIZED_SESSION_CONFIG_BITFLAG \
- ( (uint16_t) ( \
- ( SSL_SERIALIZED_SESSION_CONFIG_TIME << SSL_SERIALIZED_SESSION_CONFIG_TIME_BIT ) | \
- ( SSL_SERIALIZED_SESSION_CONFIG_CRT << SSL_SERIALIZED_SESSION_CONFIG_CRT_BIT ) | \
- ( SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET << SSL_SERIALIZED_SESSION_CONFIG_CLIENT_TICKET_BIT ) | \
- ( SSL_SERIALIZED_SESSION_CONFIG_MFL << SSL_SERIALIZED_SESSION_CONFIG_MFL_BIT ) | \
- ( SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC << SSL_SERIALIZED_SESSION_CONFIG_TRUNC_HMAC_BIT ) | \
- ( SSL_SERIALIZED_SESSION_CONFIG_ETM << SSL_SERIALIZED_SESSION_CONFIG_ETM_BIT ) | \
- ( SSL_SERIALIZED_SESSION_CONFIG_TICKET << SSL_SERIALIZED_SESSION_CONFIG_TICKET_BIT ) ) )
-
-static unsigned char ssl_serialized_session_header[] = {
- MBEDTLS_VERSION_MAJOR,
- MBEDTLS_VERSION_MINOR,
- MBEDTLS_VERSION_PATCH,
- ( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 8 ) & 0xFF,
- ( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 0 ) & 0xFF,
-};
-
-/*
- * Serialize a session in the following format:
- * (in the presentation language of TLS, RFC 8446 section 3)
- *
- * opaque mbedtls_version[3]; // major, minor, patch
- * opaque session_format[2]; // version-specific 16-bit field determining
- * // the format of the remaining
- * // serialized data.
- *
- * Note: When updating the format, remember to keep
- * these version+format bytes.
- *
- * // In this version, `session_format` determines
- * // the setting of those compile-time
- * // configuration options which influence
- * // the structure of mbedtls_ssl_session.
- * uint64 start_time;
- * uint8 ciphersuite[2]; // defined by the standard
- * uint8 compression; // 0 or 1
- * uint8 session_id_len; // at most 32
- * opaque session_id[32];
- * opaque master[48]; // fixed length in the standard
- * uint32 verify_result;
- * opaque peer_cert<0..2^24-1>; // length 0 means no peer cert
- * opaque ticket<0..2^24-1>; // length 0 means no ticket
- * uint32 ticket_lifetime;
- * uint8 mfl_code; // up to 255 according to standard
- * uint8 trunc_hmac; // 0 or 1
- * uint8 encrypt_then_mac; // 0 or 1
- *
- * The order is the same as in the definition of the structure, except
- * verify_result is put before peer_cert so that all mandatory fields come
- * together in one block.
- */
-static int ssl_session_save( const mbedtls_ssl_session *session,
- unsigned char omit_header,
- unsigned char *buf,
- size_t buf_len,
- size_t *olen )
-{
- unsigned char *p = buf;
- size_t used = 0;
-#if defined(MBEDTLS_HAVE_TIME)
- uint64_t start;
-#endif
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- size_t cert_len;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-
- if( !omit_header )
- {
- /*
- * Add version identifier
- */
-
- used += sizeof( ssl_serialized_session_header );
-
- if( used <= buf_len )
- {
- memcpy( p, ssl_serialized_session_header,
- sizeof( ssl_serialized_session_header ) );
- p += sizeof( ssl_serialized_session_header );
- }
- }
-
- /*
- * Time
- */
-#if defined(MBEDTLS_HAVE_TIME)
- used += 8;
-
- if( used <= buf_len )
- {
- start = (uint64_t) session->start;
-
- *p++ = (unsigned char)( ( start >> 56 ) & 0xFF );
- *p++ = (unsigned char)( ( start >> 48 ) & 0xFF );
- *p++ = (unsigned char)( ( start >> 40 ) & 0xFF );
- *p++ = (unsigned char)( ( start >> 32 ) & 0xFF );
- *p++ = (unsigned char)( ( start >> 24 ) & 0xFF );
- *p++ = (unsigned char)( ( start >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( start >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( start ) & 0xFF );
- }
-#endif /* MBEDTLS_HAVE_TIME */
-
- /*
- * Basic mandatory fields
- */
- used += 2 /* ciphersuite */
- + 1 /* compression */
- + 1 /* id_len */
- + sizeof( session->id )
- + sizeof( session->master )
- + 4; /* verify_result */
-
- if( used <= buf_len )
- {
- *p++ = (unsigned char)( ( session->ciphersuite >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( session->ciphersuite ) & 0xFF );
-
- *p++ = (unsigned char)( session->compression & 0xFF );
-
- *p++ = (unsigned char)( session->id_len & 0xFF );
- memcpy( p, session->id, 32 );
- p += 32;
-
- memcpy( p, session->master, 48 );
- p += 48;
-
- *p++ = (unsigned char)( ( session->verify_result >> 24 ) & 0xFF );
- *p++ = (unsigned char)( ( session->verify_result >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( session->verify_result >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( session->verify_result ) & 0xFF );
- }
-
- /*
- * Peer's end-entity certificate
- */
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- if( session->peer_cert == NULL )
- cert_len = 0;
- else
- cert_len = session->peer_cert->raw.len;
-
- used += 3 + cert_len;
-
- if( used <= buf_len )
- {
- *p++ = (unsigned char)( ( cert_len >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( cert_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( cert_len ) & 0xFF );
-
- if( session->peer_cert != NULL )
- {
- memcpy( p, session->peer_cert->raw.p, cert_len );
- p += cert_len;
- }
- }
-#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( session->peer_cert_digest != NULL )
- {
- used += 1 /* type */ + 1 /* length */ + session->peer_cert_digest_len;
- if( used <= buf_len )
- {
- *p++ = (unsigned char) session->peer_cert_digest_type;
- *p++ = (unsigned char) session->peer_cert_digest_len;
- memcpy( p, session->peer_cert_digest,
- session->peer_cert_digest_len );
- p += session->peer_cert_digest_len;
- }
- }
- else
- {
- used += 2;
- if( used <= buf_len )
- {
- *p++ = (unsigned char) MBEDTLS_MD_NONE;
- *p++ = 0;
- }
- }
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
- /*
- * Session ticket if any, plus associated data
- */
-#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
- used += 3 + session->ticket_len + 4; /* len + ticket + lifetime */
-
- if( used <= buf_len )
- {
- *p++ = (unsigned char)( ( session->ticket_len >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( session->ticket_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( session->ticket_len ) & 0xFF );
-
- if( session->ticket != NULL )
- {
- memcpy( p, session->ticket, session->ticket_len );
- p += session->ticket_len;
- }
-
- *p++ = (unsigned char)( ( session->ticket_lifetime >> 24 ) & 0xFF );
- *p++ = (unsigned char)( ( session->ticket_lifetime >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( session->ticket_lifetime >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( session->ticket_lifetime ) & 0xFF );
- }
-#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
-
- /*
- * Misc extension-related info
- */
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
- used += 1;
-
- if( used <= buf_len )
- *p++ = session->mfl_code;
-#endif
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- used += 1;
-
- if( used <= buf_len )
- *p++ = (unsigned char)( ( session->trunc_hmac ) & 0xFF );
-#endif
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- used += 1;
-
- if( used <= buf_len )
- *p++ = (unsigned char)( ( session->encrypt_then_mac ) & 0xFF );
-#endif
-
- /* Done */
- *olen = used;
-
- if( used > buf_len )
- return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
-
- return( 0 );
-}
-
-/*
- * Public wrapper for ssl_session_save()
- */
-int mbedtls_ssl_session_save( const mbedtls_ssl_session *session,
- unsigned char *buf,
- size_t buf_len,
- size_t *olen )
-{
- return( ssl_session_save( session, 0, buf, buf_len, olen ) );
-}
-
-/*
- * Deserialize session, see mbedtls_ssl_session_save() for format.
- *
- * This internal version is wrapped by a public function that cleans up in
- * case of error, and has an extra option omit_header.
- */
-static int ssl_session_load( mbedtls_ssl_session *session,
- unsigned char omit_header,
- const unsigned char *buf,
- size_t len )
-{
- const unsigned char *p = buf;
- const unsigned char * const end = buf + len;
-#if defined(MBEDTLS_HAVE_TIME)
- uint64_t start;
-#endif
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- size_t cert_len;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
- if( !omit_header )
- {
- /*
- * Check version identifier
- */
-
- if( (size_t)( end - p ) < sizeof( ssl_serialized_session_header ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( memcmp( p, ssl_serialized_session_header,
- sizeof( ssl_serialized_session_header ) ) != 0 )
- {
- return( MBEDTLS_ERR_SSL_VERSION_MISMATCH );
- }
- p += sizeof( ssl_serialized_session_header );
- }
-
- /*
- * Time
- */
-#if defined(MBEDTLS_HAVE_TIME)
- if( 8 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- start = ( (uint64_t) p[0] << 56 ) |
- ( (uint64_t) p[1] << 48 ) |
- ( (uint64_t) p[2] << 40 ) |
- ( (uint64_t) p[3] << 32 ) |
- ( (uint64_t) p[4] << 24 ) |
- ( (uint64_t) p[5] << 16 ) |
- ( (uint64_t) p[6] << 8 ) |
- ( (uint64_t) p[7] );
- p += 8;
-
- session->start = (time_t) start;
-#endif /* MBEDTLS_HAVE_TIME */
-
- /*
- * Basic mandatory fields
- */
- if( 2 + 1 + 1 + 32 + 48 + 4 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->ciphersuite = ( p[0] << 8 ) | p[1];
- p += 2;
-
- session->compression = *p++;
-
- session->id_len = *p++;
- memcpy( session->id, p, 32 );
- p += 32;
-
- memcpy( session->master, p, 48 );
- p += 48;
-
- session->verify_result = ( (uint32_t) p[0] << 24 ) |
- ( (uint32_t) p[1] << 16 ) |
- ( (uint32_t) p[2] << 8 ) |
- ( (uint32_t) p[3] );
- p += 4;
-
- /* Immediately clear invalid pointer values that have been read, in case
- * we exit early before we replaced them with valid ones. */
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- session->peer_cert = NULL;
-#else
- session->peer_cert_digest = NULL;
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
- session->ticket = NULL;
-#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
-
- /*
- * Peer certificate
- */
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- /* Deserialize CRT from the end of the ticket. */
- if( 3 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- cert_len = ( p[0] << 16 ) | ( p[1] << 8 ) | p[2];
- p += 3;
-
- if( cert_len != 0 )
- {
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- if( cert_len > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->peer_cert = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) );
-
- if( session->peer_cert == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- mbedtls_x509_crt_init( session->peer_cert );
-
- if( ( ret = mbedtls_x509_crt_parse_der( session->peer_cert,
- p, cert_len ) ) != 0 )
- {
- mbedtls_x509_crt_free( session->peer_cert );
- mbedtls_free( session->peer_cert );
- session->peer_cert = NULL;
- return( ret );
- }
-
- p += cert_len;
- }
-#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- /* Deserialize CRT digest from the end of the ticket. */
- if( 2 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->peer_cert_digest_type = (mbedtls_md_type_t) *p++;
- session->peer_cert_digest_len = (size_t) *p++;
-
- if( session->peer_cert_digest_len != 0 )
- {
- const mbedtls_md_info_t *md_info =
- mbedtls_md_info_from_type( session->peer_cert_digest_type );
- if( md_info == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- if( session->peer_cert_digest_len != mbedtls_md_get_size( md_info ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( session->peer_cert_digest_len > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->peer_cert_digest =
- mbedtls_calloc( 1, session->peer_cert_digest_len );
- if( session->peer_cert_digest == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- memcpy( session->peer_cert_digest, p,
- session->peer_cert_digest_len );
- p += session->peer_cert_digest_len;
- }
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
- /*
- * Session ticket and associated data
- */
-#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
- if( 3 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->ticket_len = ( p[0] << 16 ) | ( p[1] << 8 ) | p[2];
- p += 3;
-
- if( session->ticket_len != 0 )
- {
- if( session->ticket_len > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->ticket = mbedtls_calloc( 1, session->ticket_len );
- if( session->ticket == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
-
- memcpy( session->ticket, p, session->ticket_len );
- p += session->ticket_len;
- }
-
- if( 4 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->ticket_lifetime = ( (uint32_t) p[0] << 24 ) |
- ( (uint32_t) p[1] << 16 ) |
- ( (uint32_t) p[2] << 8 ) |
- ( (uint32_t) p[3] );
- p += 4;
-#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_CLI_C */
-
- /*
- * Misc extension-related info
- */
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
- if( 1 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->mfl_code = *p++;
-#endif
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- if( 1 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->trunc_hmac = *p++;
-#endif
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- if( 1 > (size_t)( end - p ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session->encrypt_then_mac = *p++;
-#endif
-
- /* Done, should have consumed entire buffer */
- if( p != end )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- return( 0 );
-}
-
-/*
- * Deserialize session: public wrapper for error cleaning
- */
-int mbedtls_ssl_session_load( mbedtls_ssl_session *session,
- const unsigned char *buf,
- size_t len )
-{
- int ret = ssl_session_load( session, 0, buf, len );
-
- if( ret != 0 )
- mbedtls_ssl_session_free( session );
-
- return( ret );
-}
-
-/*
- * Perform a single step of the SSL handshake
- */
-int mbedtls_ssl_handshake_step( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
-
- if( ssl == NULL || ssl->conf == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
-#if defined(MBEDTLS_SSL_CLI_C)
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
- ret = mbedtls_ssl_handshake_client_step( ssl );
-#endif
-#if defined(MBEDTLS_SSL_SRV_C)
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
- ret = mbedtls_ssl_handshake_server_step( ssl );
-#endif
-
- return( ret );
-}
-
-/*
- * Perform the SSL handshake
- */
-int mbedtls_ssl_handshake( mbedtls_ssl_context *ssl )
-{
- int ret = 0;
-
- if( ssl == NULL || ssl->conf == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> handshake" ) );
-
- while( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
- {
- ret = mbedtls_ssl_handshake_step( ssl );
-
- if( ret != 0 )
- break;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= handshake" ) );
-
- return( ret );
-}
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
-#if defined(MBEDTLS_SSL_SRV_C)
-/*
- * Write HelloRequest to request renegotiation on server
- */
-static int ssl_write_hello_request( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write hello request" ) );
-
- ssl->out_msglen = 4;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_HELLO_REQUEST;
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write hello request" ) );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_SRV_C */
-
-/*
- * Actually renegotiate current connection, triggered by either:
- * - any side: calling mbedtls_ssl_renegotiate(),
- * - client: receiving a HelloRequest during mbedtls_ssl_read(),
- * - server: receiving any handshake message on server during mbedtls_ssl_read() after
- * the initial handshake is completed.
- * If the handshake doesn't complete due to waiting for I/O, it will continue
- * during the next calls to mbedtls_ssl_renegotiate() or mbedtls_ssl_read() respectively.
- */
-int mbedtls_ssl_start_renegotiation( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> renegotiate" ) );
-
- if( ( ret = ssl_handshake_init( ssl ) ) != 0 )
- return( ret );
-
- /* RFC 6347 4.2.2: "[...] the HelloRequest will have message_seq = 0 and
- * the ServerHello will have message_seq = 1" */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_PENDING )
- {
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
- ssl->handshake->out_msg_seq = 1;
- else
- ssl->handshake->in_msg_seq = 1;
- }
-#endif
-
- ssl->state = MBEDTLS_SSL_HELLO_REQUEST;
- ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS;
-
- if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= renegotiate" ) );
-
- return( 0 );
-}
-
-/*
- * Renegotiate current connection on client,
- * or request renegotiation on server
- */
-int mbedtls_ssl_renegotiate( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
-
- if( ssl == NULL || ssl->conf == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
-#if defined(MBEDTLS_SSL_SRV_C)
- /* On server, just send the request */
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
- {
- if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ssl->renego_status = MBEDTLS_SSL_RENEGOTIATION_PENDING;
-
- /* Did we already try/start sending HelloRequest? */
- if( ssl->out_left != 0 )
- return( mbedtls_ssl_flush_output( ssl ) );
-
- return( ssl_write_hello_request( ssl ) );
- }
-#endif /* MBEDTLS_SSL_SRV_C */
-
-#if defined(MBEDTLS_SSL_CLI_C)
- /*
- * On client, either start the renegotiation process or,
- * if already in progress, continue the handshake
- */
- if( ssl->renego_status != MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
- {
- if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( ( ret = ssl_start_renegotiation( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "ssl_start_renegotiation", ret );
- return( ret );
- }
- }
- else
- {
- if( ( ret = mbedtls_ssl_handshake( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_handshake", ret );
- return( ret );
- }
- }
-#endif /* MBEDTLS_SSL_CLI_C */
-
- return( ret );
-}
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
-void mbedtls_ssl_transform_free( mbedtls_ssl_transform *transform )
-{
- if( transform == NULL )
- return;
-
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- deflateEnd( &transform->ctx_deflate );
- inflateEnd( &transform->ctx_inflate );
-#endif
-
- mbedtls_cipher_free( &transform->cipher_ctx_enc );
- mbedtls_cipher_free( &transform->cipher_ctx_dec );
-
-#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
- mbedtls_md_free( &transform->md_ctx_enc );
- mbedtls_md_free( &transform->md_ctx_dec );
-#endif
-
- mbedtls_platform_zeroize( transform, sizeof( mbedtls_ssl_transform ) );
-}
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-static void ssl_key_cert_free( mbedtls_ssl_key_cert *key_cert )
-{
- mbedtls_ssl_key_cert *cur = key_cert, *next;
-
- while( cur != NULL )
- {
- next = cur->next;
- mbedtls_free( cur );
- cur = next;
- }
-}
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-void mbedtls_ssl_handshake_free( mbedtls_ssl_context *ssl )
-{
- mbedtls_ssl_handshake_params *handshake = ssl->handshake;
-
- if( handshake == NULL )
- return;
-
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
- if( ssl->conf->f_async_cancel != NULL && handshake->async_in_progress != 0 )
- {
- ssl->conf->f_async_cancel( ssl );
- handshake->async_in_progress = 0;
- }
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- mbedtls_md5_free( &handshake->fin_md5 );
- mbedtls_sha1_free( &handshake->fin_sha1 );
-#endif
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_SHA256_C)
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- psa_hash_abort( &handshake->fin_sha256_psa );
-#else
- mbedtls_sha256_free( &handshake->fin_sha256 );
-#endif
-#endif
-#if defined(MBEDTLS_SHA512_C)
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- psa_hash_abort( &handshake->fin_sha384_psa );
-#else
- mbedtls_sha512_free( &handshake->fin_sha512 );
-#endif
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
-#if defined(MBEDTLS_DHM_C)
- mbedtls_dhm_free( &handshake->dhm_ctx );
-#endif
-#if defined(MBEDTLS_ECDH_C)
- mbedtls_ecdh_free( &handshake->ecdh_ctx );
-#endif
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- mbedtls_ecjpake_free( &handshake->ecjpake_ctx );
-#if defined(MBEDTLS_SSL_CLI_C)
- mbedtls_free( handshake->ecjpake_cache );
- handshake->ecjpake_cache = NULL;
- handshake->ecjpake_cache_len = 0;
-#endif
-#endif
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- /* explicit void pointer cast for buggy MS compiler */
- mbedtls_free( (void *) handshake->curves );
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
- if( handshake->psk != NULL )
- {
- mbedtls_platform_zeroize( handshake->psk, handshake->psk_len );
- mbedtls_free( handshake->psk );
- }
-#endif
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
- defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- /*
- * Free only the linked list wrapper, not the keys themselves
- * since the belong to the SNI callback
- */
- if( handshake->sni_key_cert != NULL )
- {
- mbedtls_ssl_key_cert *cur = handshake->sni_key_cert, *next;
-
- while( cur != NULL )
- {
- next = cur->next;
- mbedtls_free( cur );
- cur = next;
- }
- }
-#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_SSL_SERVER_NAME_INDICATION */
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- mbedtls_x509_crt_restart_free( &handshake->ecrs_ctx );
- if( handshake->ecrs_peer_cert != NULL )
- {
- mbedtls_x509_crt_free( handshake->ecrs_peer_cert );
- mbedtls_free( handshake->ecrs_peer_cert );
- }
-#endif
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C) && \
- !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- mbedtls_pk_free( &handshake->peer_pubkey );
-#endif /* MBEDTLS_X509_CRT_PARSE_C && !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- mbedtls_free( handshake->verify_cookie );
- mbedtls_ssl_flight_free( handshake->flight );
- mbedtls_ssl_buffering_free( ssl );
-#endif
-
-#if defined(MBEDTLS_ECDH_C) && \
- defined(MBEDTLS_USE_PSA_CRYPTO)
- psa_destroy_key( handshake->ecdh_psa_privkey );
-#endif /* MBEDTLS_ECDH_C && MBEDTLS_USE_PSA_CRYPTO */
-
- mbedtls_platform_zeroize( handshake,
- sizeof( mbedtls_ssl_handshake_params ) );
-}
-
-void mbedtls_ssl_session_free( mbedtls_ssl_session *session )
-{
- if( session == NULL )
- return;
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- ssl_clear_peer_cert( session );
-#endif
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
- mbedtls_free( session->ticket );
-#endif
-
- mbedtls_platform_zeroize( session, sizeof( mbedtls_ssl_session ) );
-}
-
-#if defined(MBEDTLS_SSL_CONTEXT_SERIALIZATION)
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID 1u
-#else
-#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID 0u
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
-#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT 1u
-#else
-#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT 0u
-#endif /* MBEDTLS_SSL_DTLS_BADMAC_LIMIT */
-
-#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
-#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY 1u
-#else
-#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY 0u
-#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */
-
-#if defined(MBEDTLS_SSL_ALPN)
-#define SSL_SERIALIZED_CONTEXT_CONFIG_ALPN 1u
-#else
-#define SSL_SERIALIZED_CONTEXT_CONFIG_ALPN 0u
-#endif /* MBEDTLS_SSL_ALPN */
-
-#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID_BIT 0
-#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT_BIT 1
-#define SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY_BIT 2
-#define SSL_SERIALIZED_CONTEXT_CONFIG_ALPN_BIT 3
-
-#define SSL_SERIALIZED_CONTEXT_CONFIG_BITFLAG \
- ( (uint32_t) ( \
- ( SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID << SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_CONNECTION_ID_BIT ) | \
- ( SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT << SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_BADMAC_LIMIT_BIT ) | \
- ( SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY << SSL_SERIALIZED_CONTEXT_CONFIG_DTLS_ANTI_REPLAY_BIT ) | \
- ( SSL_SERIALIZED_CONTEXT_CONFIG_ALPN << SSL_SERIALIZED_CONTEXT_CONFIG_ALPN_BIT ) | \
- 0u ) )
-
-static unsigned char ssl_serialized_context_header[] = {
- MBEDTLS_VERSION_MAJOR,
- MBEDTLS_VERSION_MINOR,
- MBEDTLS_VERSION_PATCH,
- ( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 8 ) & 0xFF,
- ( SSL_SERIALIZED_SESSION_CONFIG_BITFLAG >> 0 ) & 0xFF,
- ( SSL_SERIALIZED_CONTEXT_CONFIG_BITFLAG >> 16 ) & 0xFF,
- ( SSL_SERIALIZED_CONTEXT_CONFIG_BITFLAG >> 8 ) & 0xFF,
- ( SSL_SERIALIZED_CONTEXT_CONFIG_BITFLAG >> 0 ) & 0xFF,
-};
-
-/*
- * Serialize a full SSL context
- *
- * The format of the serialized data is:
- * (in the presentation language of TLS, RFC 8446 section 3)
- *
- * // header
- * opaque mbedtls_version[3]; // major, minor, patch
- * opaque context_format[5]; // version-specific field determining
- * // the format of the remaining
- * // serialized data.
- * Note: When updating the format, remember to keep these
- * version+format bytes. (We may make their size part of the API.)
- *
- * // session sub-structure
- * opaque session<1..2^32-1>; // see mbedtls_ssl_session_save()
- * // transform sub-structure
- * uint8 random[64]; // ServerHello.random+ClientHello.random
- * uint8 in_cid<0..2^8-1> // Connection ID: expected incoming value
- * uint8 out_cid<0..2^8-1> // Connection ID: outgoing value to use
- * // fields from ssl_context
- * uint32 badmac_seen; // DTLS: number of records with failing MAC
- * uint64 in_window_top; // DTLS: last validated record seq_num
- * uint64 in_window; // DTLS: bitmask for replay protection
- * uint8 disable_datagram_packing; // DTLS: only one record per datagram
- * uint64 cur_out_ctr; // Record layer: outgoing sequence number
- * uint16 mtu; // DTLS: path mtu (max outgoing fragment size)
- * uint8 alpn_chosen<0..2^8-1> // ALPN: negotiated application protocol
- *
- * Note that many fields of the ssl_context or sub-structures are not
- * serialized, as they fall in one of the following categories:
- *
- * 1. forced value (eg in_left must be 0)
- * 2. pointer to dynamically-allocated memory (eg session, transform)
- * 3. value can be re-derived from other data (eg session keys from MS)
- * 4. value was temporary (eg content of input buffer)
- * 5. value will be provided by the user again (eg I/O callbacks and context)
- */
-int mbedtls_ssl_context_save( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t buf_len,
- size_t *olen )
-{
- unsigned char *p = buf;
- size_t used = 0;
- size_t session_len;
- int ret = 0;
-
- /*
- * Enforce usage restrictions, see "return BAD_INPUT_DATA" in
- * this function's documentation.
- *
- * These are due to assumptions/limitations in the implementation. Some of
- * them are likely to stay (no handshake in progress) some might go away
- * (only DTLS) but are currently used to simplify the implementation.
- */
- /* The initial handshake must be over */
- if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Initial handshake isn't over" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
- if( ssl->handshake != NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Handshake isn't completed" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
- /* Double-check that sub-structures are indeed ready */
- if( ssl->transform == NULL || ssl->session == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Serialised structures aren't ready" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
- /* There must be no pending incoming or outgoing data */
- if( mbedtls_ssl_check_pending( ssl ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "There is pending incoming data" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
- if( ssl->out_left != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "There is pending outgoing data" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
- /* Protocol must be DLTS, not TLS */
- if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Only DTLS is supported" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
- /* Version must be 1.2 */
- if( ssl->major_ver != MBEDTLS_SSL_MAJOR_VERSION_3 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Only version 1.2 supported" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
- if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Only version 1.2 supported" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
- /* We must be using an AEAD ciphersuite */
- if( mbedtls_ssl_transform_uses_aead( ssl->transform ) != 1 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Only AEAD ciphersuites supported" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
- /* Renegotiation must not be enabled */
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->conf->disable_renegotiation != MBEDTLS_SSL_RENEGOTIATION_DISABLED )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Renegotiation must not be enabled" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-#endif
-
- /*
- * Version and format identifier
- */
- used += sizeof( ssl_serialized_context_header );
-
- if( used <= buf_len )
- {
- memcpy( p, ssl_serialized_context_header,
- sizeof( ssl_serialized_context_header ) );
- p += sizeof( ssl_serialized_context_header );
- }
-
- /*
- * Session (length + data)
- */
- ret = ssl_session_save( ssl->session, 1, NULL, 0, &session_len );
- if( ret != MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL )
- return( ret );
-
- used += 4 + session_len;
- if( used <= buf_len )
- {
- *p++ = (unsigned char)( ( session_len >> 24 ) & 0xFF );
- *p++ = (unsigned char)( ( session_len >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( session_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( session_len ) & 0xFF );
-
- ret = ssl_session_save( ssl->session, 1,
- p, session_len, &session_len );
- if( ret != 0 )
- return( ret );
-
- p += session_len;
- }
-
- /*
- * Transform
- */
- used += sizeof( ssl->transform->randbytes );
- if( used <= buf_len )
- {
- memcpy( p, ssl->transform->randbytes,
- sizeof( ssl->transform->randbytes ) );
- p += sizeof( ssl->transform->randbytes );
- }
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
- used += 2 + ssl->transform->in_cid_len + ssl->transform->out_cid_len;
- if( used <= buf_len )
- {
- *p++ = ssl->transform->in_cid_len;
- memcpy( p, ssl->transform->in_cid, ssl->transform->in_cid_len );
- p += ssl->transform->in_cid_len;
-
- *p++ = ssl->transform->out_cid_len;
- memcpy( p, ssl->transform->out_cid, ssl->transform->out_cid_len );
- p += ssl->transform->out_cid_len;
- }
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
- /*
- * Saved fields from top-level ssl_context structure
- */
-#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
- used += 4;
- if( used <= buf_len )
- {
- *p++ = (unsigned char)( ( ssl->badmac_seen >> 24 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->badmac_seen >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->badmac_seen >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->badmac_seen ) & 0xFF );
- }
-#endif /* MBEDTLS_SSL_DTLS_BADMAC_LIMIT */
-
-#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
- used += 16;
- if( used <= buf_len )
- {
- *p++ = (unsigned char)( ( ssl->in_window_top >> 56 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window_top >> 48 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window_top >> 40 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window_top >> 32 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window_top >> 24 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window_top >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window_top >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window_top ) & 0xFF );
-
- *p++ = (unsigned char)( ( ssl->in_window >> 56 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window >> 48 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window >> 40 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window >> 32 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window >> 24 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window >> 16 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->in_window ) & 0xFF );
- }
-#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- used += 1;
- if( used <= buf_len )
- {
- *p++ = ssl->disable_datagram_packing;
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- used += 8;
- if( used <= buf_len )
- {
- memcpy( p, ssl->cur_out_ctr, 8 );
- p += 8;
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- used += 2;
- if( used <= buf_len )
- {
- *p++ = (unsigned char)( ( ssl->mtu >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ssl->mtu ) & 0xFF );
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
-#if defined(MBEDTLS_SSL_ALPN)
- {
- const uint8_t alpn_len = ssl->alpn_chosen
- ? (uint8_t) strlen( ssl->alpn_chosen )
- : 0;
-
- used += 1 + alpn_len;
- if( used <= buf_len )
- {
- *p++ = alpn_len;
-
- if( ssl->alpn_chosen != NULL )
- {
- memcpy( p, ssl->alpn_chosen, alpn_len );
- p += alpn_len;
- }
- }
- }
-#endif /* MBEDTLS_SSL_ALPN */
-
- /*
- * Done
- */
- *olen = used;
-
- if( used > buf_len )
- return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
-
- MBEDTLS_SSL_DEBUG_BUF( 4, "saved context", buf, used );
-
- return( mbedtls_ssl_session_reset_int( ssl, 0 ) );
-}
-
-/*
- * Helper to get TLS 1.2 PRF from ciphersuite
- * (Duplicates bits of logic from ssl_set_handshake_prfs().)
- */
-typedef int (*tls_prf_fn)( const unsigned char *secret, size_t slen,
- const char *label,
- const unsigned char *random, size_t rlen,
- unsigned char *dstbuf, size_t dlen );
-static tls_prf_fn ssl_tls12prf_from_cs( int ciphersuite_id )
-{
-#if defined(MBEDTLS_SHA512_C)
- const mbedtls_ssl_ciphersuite_t * const ciphersuite_info =
- mbedtls_ssl_ciphersuite_from_id( ciphersuite_id );
-
- if( ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
- return( tls_prf_sha384 );
-#else
- (void) ciphersuite_id;
-#endif
- return( tls_prf_sha256 );
-}
-
-/*
- * Deserialize context, see mbedtls_ssl_context_save() for format.
- *
- * This internal version is wrapped by a public function that cleans up in
- * case of error.
- */
-static int ssl_context_load( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- const unsigned char *p = buf;
- const unsigned char * const end = buf + len;
- size_t session_len;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- /*
- * The context should have been freshly setup or reset.
- * Give the user an error in case of obvious misuse.
- * (Checking session is useful because it won't be NULL if we're
- * renegotiating, or if the user mistakenly loaded a session first.)
- */
- if( ssl->state != MBEDTLS_SSL_HELLO_REQUEST ||
- ssl->session != NULL )
- {
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- /*
- * We can't check that the config matches the initial one, but we can at
- * least check it matches the requirements for serializing.
- */
- if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ||
- ssl->conf->max_major_ver < MBEDTLS_SSL_MAJOR_VERSION_3 ||
- ssl->conf->min_major_ver > MBEDTLS_SSL_MAJOR_VERSION_3 ||
- ssl->conf->max_minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 ||
- ssl->conf->min_minor_ver > MBEDTLS_SSL_MINOR_VERSION_3 ||
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- ssl->conf->disable_renegotiation != MBEDTLS_SSL_RENEGOTIATION_DISABLED ||
-#endif
- 0 )
- {
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 4, "context to load", buf, len );
-
- /*
- * Check version identifier
- */
- if( (size_t)( end - p ) < sizeof( ssl_serialized_context_header ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- if( memcmp( p, ssl_serialized_context_header,
- sizeof( ssl_serialized_context_header ) ) != 0 )
- {
- return( MBEDTLS_ERR_SSL_VERSION_MISMATCH );
- }
- p += sizeof( ssl_serialized_context_header );
-
- /*
- * Session
- */
- if( (size_t)( end - p ) < 4 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- session_len = ( (size_t) p[0] << 24 ) |
- ( (size_t) p[1] << 16 ) |
- ( (size_t) p[2] << 8 ) |
- ( (size_t) p[3] );
- p += 4;
-
- /* This has been allocated by ssl_handshake_init(), called by
- * by either mbedtls_ssl_session_reset_int() or mbedtls_ssl_setup(). */
- ssl->session = ssl->session_negotiate;
- ssl->session_in = ssl->session;
- ssl->session_out = ssl->session;
- ssl->session_negotiate = NULL;
-
- if( (size_t)( end - p ) < session_len )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ret = ssl_session_load( ssl->session, 1, p, session_len );
- if( ret != 0 )
- {
- mbedtls_ssl_session_free( ssl->session );
- return( ret );
- }
-
- p += session_len;
-
- /*
- * Transform
- */
-
- /* This has been allocated by ssl_handshake_init(), called by
- * by either mbedtls_ssl_session_reset_int() or mbedtls_ssl_setup(). */
- ssl->transform = ssl->transform_negotiate;
- ssl->transform_in = ssl->transform;
- ssl->transform_out = ssl->transform;
- ssl->transform_negotiate = NULL;
-
- /* Read random bytes and populate structure */
- if( (size_t)( end - p ) < sizeof( ssl->transform->randbytes ) )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ret = ssl_populate_transform( ssl->transform,
- ssl->session->ciphersuite,
- ssl->session->master,
-#if defined(MBEDTLS_SSL_SOME_MODES_USE_MAC)
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- ssl->session->encrypt_then_mac,
-#endif
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- ssl->session->trunc_hmac,
-#endif
-#endif /* MBEDTLS_SSL_SOME_MODES_USE_MAC */
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- ssl->session->compression,
-#endif
- ssl_tls12prf_from_cs( ssl->session->ciphersuite ),
- p, /* currently pointing to randbytes */
- MBEDTLS_SSL_MINOR_VERSION_3, /* (D)TLS 1.2 is forced */
- ssl->conf->endpoint,
- ssl );
- if( ret != 0 )
- return( ret );
-
- p += sizeof( ssl->transform->randbytes );
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
- /* Read connection IDs and store them */
- if( (size_t)( end - p ) < 1 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ssl->transform->in_cid_len = *p++;
-
- if( (size_t)( end - p ) < ssl->transform->in_cid_len + 1u )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- memcpy( ssl->transform->in_cid, p, ssl->transform->in_cid_len );
- p += ssl->transform->in_cid_len;
-
- ssl->transform->out_cid_len = *p++;
-
- if( (size_t)( end - p ) < ssl->transform->out_cid_len )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- memcpy( ssl->transform->out_cid, p, ssl->transform->out_cid_len );
- p += ssl->transform->out_cid_len;
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
- /*
- * Saved fields from top-level ssl_context structure
- */
-#if defined(MBEDTLS_SSL_DTLS_BADMAC_LIMIT)
- if( (size_t)( end - p ) < 4 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ssl->badmac_seen = ( (uint32_t) p[0] << 24 ) |
- ( (uint32_t) p[1] << 16 ) |
- ( (uint32_t) p[2] << 8 ) |
- ( (uint32_t) p[3] );
- p += 4;
-#endif /* MBEDTLS_SSL_DTLS_BADMAC_LIMIT */
-
-#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
- if( (size_t)( end - p ) < 16 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ssl->in_window_top = ( (uint64_t) p[0] << 56 ) |
- ( (uint64_t) p[1] << 48 ) |
- ( (uint64_t) p[2] << 40 ) |
- ( (uint64_t) p[3] << 32 ) |
- ( (uint64_t) p[4] << 24 ) |
- ( (uint64_t) p[5] << 16 ) |
- ( (uint64_t) p[6] << 8 ) |
- ( (uint64_t) p[7] );
- p += 8;
-
- ssl->in_window = ( (uint64_t) p[0] << 56 ) |
- ( (uint64_t) p[1] << 48 ) |
- ( (uint64_t) p[2] << 40 ) |
- ( (uint64_t) p[3] << 32 ) |
- ( (uint64_t) p[4] << 24 ) |
- ( (uint64_t) p[5] << 16 ) |
- ( (uint64_t) p[6] << 8 ) |
- ( (uint64_t) p[7] );
- p += 8;
-#endif /* MBEDTLS_SSL_DTLS_ANTI_REPLAY */
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( (size_t)( end - p ) < 1 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ssl->disable_datagram_packing = *p++;
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- if( (size_t)( end - p ) < 8 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- memcpy( ssl->cur_out_ctr, p, 8 );
- p += 8;
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( (size_t)( end - p ) < 2 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- ssl->mtu = ( p[0] << 8 ) | p[1];
- p += 2;
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
-#if defined(MBEDTLS_SSL_ALPN)
- {
- uint8_t alpn_len;
- const char **cur;
-
- if( (size_t)( end - p ) < 1 )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- alpn_len = *p++;
-
- if( alpn_len != 0 && ssl->conf->alpn_list != NULL )
- {
- /* alpn_chosen should point to an item in the configured list */
- for( cur = ssl->conf->alpn_list; *cur != NULL; cur++ )
- {
- if( strlen( *cur ) == alpn_len &&
- memcmp( p, cur, alpn_len ) == 0 )
- {
- ssl->alpn_chosen = *cur;
- break;
- }
- }
- }
-
- /* can only happen on conf mismatch */
- if( alpn_len != 0 && ssl->alpn_chosen == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- p += alpn_len;
- }
-#endif /* MBEDTLS_SSL_ALPN */
-
- /*
- * Forced fields from top-level ssl_context structure
- *
- * Most of them already set to the correct value by mbedtls_ssl_init() and
- * mbedtls_ssl_reset(), so we only need to set the remaining ones.
- */
- ssl->state = MBEDTLS_SSL_HANDSHAKE_OVER;
-
- ssl->major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
- ssl->minor_ver = MBEDTLS_SSL_MINOR_VERSION_3;
-
- /* Adjust pointers for header fields of outgoing records to
- * the given transform, accounting for explicit IV and CID. */
- mbedtls_ssl_update_out_pointers( ssl, ssl->transform );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- ssl->in_epoch = 1;
-#endif
-
- /* mbedtls_ssl_reset() leaves the handshake sub-structure allocated,
- * which we don't want - otherwise we'd end up freeing the wrong transform
- * by calling mbedtls_ssl_handshake_wrapup_free_hs_transform()
- * inappropriately. */
- if( ssl->handshake != NULL )
- {
- mbedtls_ssl_handshake_free( ssl );
- mbedtls_free( ssl->handshake );
- ssl->handshake = NULL;
- }
-
- /*
- * Done - should have consumed entire buffer
- */
- if( p != end )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- return( 0 );
-}
-
-/*
- * Deserialize context: public wrapper for error cleaning
- */
-int mbedtls_ssl_context_load( mbedtls_ssl_context *context,
- const unsigned char *buf,
- size_t len )
-{
- int ret = ssl_context_load( context, buf, len );
-
- if( ret != 0 )
- mbedtls_ssl_free( context );
-
- return( ret );
-}
-#endif /* MBEDTLS_SSL_CONTEXT_SERIALIZATION */
-
-/*
- * Free an SSL context
- */
-void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
-{
- if( ssl == NULL )
- return;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> free" ) );
-
- if( ssl->out_buf != NULL )
- {
- mbedtls_platform_zeroize( ssl->out_buf, MBEDTLS_SSL_OUT_BUFFER_LEN );
- mbedtls_free( ssl->out_buf );
- }
-
- if( ssl->in_buf != NULL )
- {
- mbedtls_platform_zeroize( ssl->in_buf, MBEDTLS_SSL_IN_BUFFER_LEN );
- mbedtls_free( ssl->in_buf );
- }
-
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- if( ssl->compress_buf != NULL )
- {
- mbedtls_platform_zeroize( ssl->compress_buf, MBEDTLS_SSL_COMPRESS_BUFFER_LEN );
- mbedtls_free( ssl->compress_buf );
- }
-#endif
-
- if( ssl->transform )
- {
- mbedtls_ssl_transform_free( ssl->transform );
- mbedtls_free( ssl->transform );
- }
-
- if( ssl->handshake )
- {
- mbedtls_ssl_handshake_free( ssl );
- mbedtls_ssl_transform_free( ssl->transform_negotiate );
- mbedtls_ssl_session_free( ssl->session_negotiate );
-
- mbedtls_free( ssl->handshake );
- mbedtls_free( ssl->transform_negotiate );
- mbedtls_free( ssl->session_negotiate );
- }
-
- if( ssl->session )
- {
- mbedtls_ssl_session_free( ssl->session );
- mbedtls_free( ssl->session );
- }
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- if( ssl->hostname != NULL )
- {
- mbedtls_platform_zeroize( ssl->hostname, strlen( ssl->hostname ) );
- mbedtls_free( ssl->hostname );
- }
-#endif
-
-#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
- if( mbedtls_ssl_hw_record_finish != NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "going for mbedtls_ssl_hw_record_finish()" ) );
- mbedtls_ssl_hw_record_finish( ssl );
- }
-#endif
-
-#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
- mbedtls_free( ssl->cli_id );
-#endif
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= free" ) );
-
- /* Actually clear after last debug message */
- mbedtls_platform_zeroize( ssl, sizeof( mbedtls_ssl_context ) );
-}
-
-/*
- * Initialze mbedtls_ssl_config
- */
-void mbedtls_ssl_config_init( mbedtls_ssl_config *conf )
-{
- memset( conf, 0, sizeof( mbedtls_ssl_config ) );
-}
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-static int ssl_preset_default_hashes[] = {
-#if defined(MBEDTLS_SHA512_C)
- MBEDTLS_MD_SHA512,
- MBEDTLS_MD_SHA384,
-#endif
-#if defined(MBEDTLS_SHA256_C)
- MBEDTLS_MD_SHA256,
- MBEDTLS_MD_SHA224,
-#endif
-#if defined(MBEDTLS_SHA1_C) && defined(MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_KEY_EXCHANGE)
- MBEDTLS_MD_SHA1,
-#endif
- MBEDTLS_MD_NONE
-};
-#endif
-
-static int ssl_preset_suiteb_ciphersuites[] = {
- MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
- MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
- 0
-};
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-static int ssl_preset_suiteb_hashes[] = {
- MBEDTLS_MD_SHA256,
- MBEDTLS_MD_SHA384,
- MBEDTLS_MD_NONE
-};
-#endif
-
-#if defined(MBEDTLS_ECP_C)
-static mbedtls_ecp_group_id ssl_preset_suiteb_curves[] = {
-#if defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
- MBEDTLS_ECP_DP_SECP256R1,
-#endif
-#if defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
- MBEDTLS_ECP_DP_SECP384R1,
-#endif
- MBEDTLS_ECP_DP_NONE
-};
-#endif
-
-/*
- * Load default in mbedtls_ssl_config
- */
-int mbedtls_ssl_config_defaults( mbedtls_ssl_config *conf,
- int endpoint, int transport, int preset )
-{
-#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-#endif
-
- /* Use the functions here so that they are covered in tests,
- * but otherwise access member directly for efficiency */
- mbedtls_ssl_conf_endpoint( conf, endpoint );
- mbedtls_ssl_conf_transport( conf, transport );
-
- /*
- * Things that are common to all presets
- */
-#if defined(MBEDTLS_SSL_CLI_C)
- if( endpoint == MBEDTLS_SSL_IS_CLIENT )
- {
- conf->authmode = MBEDTLS_SSL_VERIFY_REQUIRED;
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- conf->session_tickets = MBEDTLS_SSL_SESSION_TICKETS_ENABLED;
-#endif
- }
-#endif
-
-#if defined(MBEDTLS_ARC4_C)
- conf->arc4_disabled = MBEDTLS_SSL_ARC4_DISABLED;
-#endif
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- conf->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
-#endif
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
- conf->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
-#endif
-
-#if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
- conf->cbc_record_splitting = MBEDTLS_SSL_CBC_RECORD_SPLITTING_ENABLED;
-#endif
-
-#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY) && defined(MBEDTLS_SSL_SRV_C)
- conf->f_cookie_write = ssl_cookie_write_dummy;
- conf->f_cookie_check = ssl_cookie_check_dummy;
-#endif
-
-#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
- conf->anti_replay = MBEDTLS_SSL_ANTI_REPLAY_ENABLED;
-#endif
-
-#if defined(MBEDTLS_SSL_SRV_C)
- conf->cert_req_ca_list = MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED;
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- conf->hs_timeout_min = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MIN;
- conf->hs_timeout_max = MBEDTLS_SSL_DTLS_TIMEOUT_DFL_MAX;
-#endif
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- conf->renego_max_records = MBEDTLS_SSL_RENEGO_MAX_RECORDS_DEFAULT;
- memset( conf->renego_period, 0x00, 2 );
- memset( conf->renego_period + 2, 0xFF, 6 );
-#endif
-
-#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_SRV_C)
- if( endpoint == MBEDTLS_SSL_IS_SERVER )
- {
- const unsigned char dhm_p[] =
- MBEDTLS_DHM_RFC3526_MODP_2048_P_BIN;
- const unsigned char dhm_g[] =
- MBEDTLS_DHM_RFC3526_MODP_2048_G_BIN;
-
- if ( ( ret = mbedtls_ssl_conf_dh_param_bin( conf,
- dhm_p, sizeof( dhm_p ),
- dhm_g, sizeof( dhm_g ) ) ) != 0 )
- {
- return( ret );
- }
- }
-#endif
-
- /*
- * Preset-specific defaults
- */
- switch( preset )
- {
- /*
- * NSA Suite B
- */
- case MBEDTLS_SSL_PRESET_SUITEB:
- conf->min_major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
- conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_3; /* TLS 1.2 */
- conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
- conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
-
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] =
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] =
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] =
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] =
- ssl_preset_suiteb_ciphersuites;
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- conf->cert_profile = &mbedtls_x509_crt_profile_suiteb;
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- conf->sig_hashes = ssl_preset_suiteb_hashes;
-#endif
-
-#if defined(MBEDTLS_ECP_C)
- conf->curve_list = ssl_preset_suiteb_curves;
-#endif
- break;
-
- /*
- * Default
- */
- default:
- conf->min_major_ver = ( MBEDTLS_SSL_MIN_MAJOR_VERSION >
- MBEDTLS_SSL_MIN_VALID_MAJOR_VERSION ) ?
- MBEDTLS_SSL_MIN_MAJOR_VERSION :
- MBEDTLS_SSL_MIN_VALID_MAJOR_VERSION;
- conf->min_minor_ver = ( MBEDTLS_SSL_MIN_MINOR_VERSION >
- MBEDTLS_SSL_MIN_VALID_MINOR_VERSION ) ?
- MBEDTLS_SSL_MIN_MINOR_VERSION :
- MBEDTLS_SSL_MIN_VALID_MINOR_VERSION;
- conf->max_major_ver = MBEDTLS_SSL_MAX_MAJOR_VERSION;
- conf->max_minor_ver = MBEDTLS_SSL_MAX_MINOR_VERSION;
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- conf->min_minor_ver = MBEDTLS_SSL_MINOR_VERSION_2;
-#endif
-
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_0] =
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_1] =
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_2] =
- conf->ciphersuite_list[MBEDTLS_SSL_MINOR_VERSION_3] =
- mbedtls_ssl_list_ciphersuites();
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- conf->cert_profile = &mbedtls_x509_crt_profile_default;
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- conf->sig_hashes = ssl_preset_default_hashes;
-#endif
-
-#if defined(MBEDTLS_ECP_C)
- conf->curve_list = mbedtls_ecp_grp_id_list();
-#endif
-
-#if defined(MBEDTLS_DHM_C) && defined(MBEDTLS_SSL_CLI_C)
- conf->dhm_min_bitlen = 1024;
-#endif
- }
-
- return( 0 );
-}
-
-/*
- * Free mbedtls_ssl_config
- */
-void mbedtls_ssl_config_free( mbedtls_ssl_config *conf )
-{
-#if defined(MBEDTLS_DHM_C)
- mbedtls_mpi_free( &conf->dhm_P );
- mbedtls_mpi_free( &conf->dhm_G );
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
- if( conf->psk != NULL )
- {
- mbedtls_platform_zeroize( conf->psk, conf->psk_len );
- mbedtls_free( conf->psk );
- conf->psk = NULL;
- conf->psk_len = 0;
- }
-
- if( conf->psk_identity != NULL )
- {
- mbedtls_platform_zeroize( conf->psk_identity, conf->psk_identity_len );
- mbedtls_free( conf->psk_identity );
- conf->psk_identity = NULL;
- conf->psk_identity_len = 0;
- }
-#endif
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- ssl_key_cert_free( conf->key_cert );
-#endif
-
- mbedtls_platform_zeroize( conf, sizeof( mbedtls_ssl_config ) );
-}
-
-#if defined(MBEDTLS_PK_C) && \
- ( defined(MBEDTLS_RSA_C) || defined(MBEDTLS_ECDSA_C) )
-/*
- * Convert between MBEDTLS_PK_XXX and SSL_SIG_XXX
- */
-unsigned char mbedtls_ssl_sig_from_pk( mbedtls_pk_context *pk )
-{
-#if defined(MBEDTLS_RSA_C)
- if( mbedtls_pk_can_do( pk, MBEDTLS_PK_RSA ) )
- return( MBEDTLS_SSL_SIG_RSA );
-#endif
-#if defined(MBEDTLS_ECDSA_C)
- if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECDSA ) )
- return( MBEDTLS_SSL_SIG_ECDSA );
-#endif
- return( MBEDTLS_SSL_SIG_ANON );
-}
-
-unsigned char mbedtls_ssl_sig_from_pk_alg( mbedtls_pk_type_t type )
-{
- switch( type ) {
- case MBEDTLS_PK_RSA:
- return( MBEDTLS_SSL_SIG_RSA );
- case MBEDTLS_PK_ECDSA:
- case MBEDTLS_PK_ECKEY:
- return( MBEDTLS_SSL_SIG_ECDSA );
- default:
- return( MBEDTLS_SSL_SIG_ANON );
- }
-}
-
-mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig )
-{
- switch( sig )
- {
-#if defined(MBEDTLS_RSA_C)
- case MBEDTLS_SSL_SIG_RSA:
- return( MBEDTLS_PK_RSA );
-#endif
-#if defined(MBEDTLS_ECDSA_C)
- case MBEDTLS_SSL_SIG_ECDSA:
- return( MBEDTLS_PK_ECDSA );
-#endif
- default:
- return( MBEDTLS_PK_NONE );
- }
-}
-#endif /* MBEDTLS_PK_C && ( MBEDTLS_RSA_C || MBEDTLS_ECDSA_C ) */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-
-/* Find an entry in a signature-hash set matching a given hash algorithm. */
-mbedtls_md_type_t mbedtls_ssl_sig_hash_set_find( mbedtls_ssl_sig_hash_set_t *set,
- mbedtls_pk_type_t sig_alg )
-{
- switch( sig_alg )
- {
- case MBEDTLS_PK_RSA:
- return( set->rsa );
- case MBEDTLS_PK_ECDSA:
- return( set->ecdsa );
- default:
- return( MBEDTLS_MD_NONE );
- }
-}
-
-/* Add a signature-hash-pair to a signature-hash set */
-void mbedtls_ssl_sig_hash_set_add( mbedtls_ssl_sig_hash_set_t *set,
- mbedtls_pk_type_t sig_alg,
- mbedtls_md_type_t md_alg )
-{
- switch( sig_alg )
- {
- case MBEDTLS_PK_RSA:
- if( set->rsa == MBEDTLS_MD_NONE )
- set->rsa = md_alg;
- break;
-
- case MBEDTLS_PK_ECDSA:
- if( set->ecdsa == MBEDTLS_MD_NONE )
- set->ecdsa = md_alg;
- break;
-
- default:
- break;
- }
-}
-
-/* Allow exactly one hash algorithm for each signature. */
-void mbedtls_ssl_sig_hash_set_const_hash( mbedtls_ssl_sig_hash_set_t *set,
- mbedtls_md_type_t md_alg )
-{
- set->rsa = md_alg;
- set->ecdsa = md_alg;
-}
-
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2) &&
- MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
-/*
- * Convert from MBEDTLS_SSL_HASH_XXX to MBEDTLS_MD_XXX
- */
-mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash )
-{
- switch( hash )
- {
-#if defined(MBEDTLS_MD5_C)
- case MBEDTLS_SSL_HASH_MD5:
- return( MBEDTLS_MD_MD5 );
-#endif
-#if defined(MBEDTLS_SHA1_C)
- case MBEDTLS_SSL_HASH_SHA1:
- return( MBEDTLS_MD_SHA1 );
-#endif
-#if defined(MBEDTLS_SHA256_C)
- case MBEDTLS_SSL_HASH_SHA224:
- return( MBEDTLS_MD_SHA224 );
- case MBEDTLS_SSL_HASH_SHA256:
- return( MBEDTLS_MD_SHA256 );
-#endif
-#if defined(MBEDTLS_SHA512_C)
- case MBEDTLS_SSL_HASH_SHA384:
- return( MBEDTLS_MD_SHA384 );
- case MBEDTLS_SSL_HASH_SHA512:
- return( MBEDTLS_MD_SHA512 );
-#endif
- default:
- return( MBEDTLS_MD_NONE );
- }
-}
-
-/*
- * Convert from MBEDTLS_MD_XXX to MBEDTLS_SSL_HASH_XXX
- */
-unsigned char mbedtls_ssl_hash_from_md_alg( int md )
-{
- switch( md )
- {
-#if defined(MBEDTLS_MD5_C)
- case MBEDTLS_MD_MD5:
- return( MBEDTLS_SSL_HASH_MD5 );
-#endif
-#if defined(MBEDTLS_SHA1_C)
- case MBEDTLS_MD_SHA1:
- return( MBEDTLS_SSL_HASH_SHA1 );
-#endif
-#if defined(MBEDTLS_SHA256_C)
- case MBEDTLS_MD_SHA224:
- return( MBEDTLS_SSL_HASH_SHA224 );
- case MBEDTLS_MD_SHA256:
- return( MBEDTLS_SSL_HASH_SHA256 );
-#endif
-#if defined(MBEDTLS_SHA512_C)
- case MBEDTLS_MD_SHA384:
- return( MBEDTLS_SSL_HASH_SHA384 );
- case MBEDTLS_MD_SHA512:
- return( MBEDTLS_SSL_HASH_SHA512 );
-#endif
- default:
- return( MBEDTLS_SSL_HASH_NONE );
- }
-}
-
-#if defined(MBEDTLS_ECP_C)
-/*
- * Check if a curve proposed by the peer is in our list.
- * Return 0 if we're willing to use it, -1 otherwise.
- */
-int mbedtls_ssl_check_curve( const mbedtls_ssl_context *ssl, mbedtls_ecp_group_id grp_id )
-{
- const mbedtls_ecp_group_id *gid;
-
- if( ssl->conf->curve_list == NULL )
- return( -1 );
-
- for( gid = ssl->conf->curve_list; *gid != MBEDTLS_ECP_DP_NONE; gid++ )
- if( *gid == grp_id )
- return( 0 );
-
- return( -1 );
-}
-#endif /* MBEDTLS_ECP_C */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-/*
- * Check if a hash proposed by the peer is in our list.
- * Return 0 if we're willing to use it, -1 otherwise.
- */
-int mbedtls_ssl_check_sig_hash( const mbedtls_ssl_context *ssl,
- mbedtls_md_type_t md )
-{
- const int *cur;
-
- if( ssl->conf->sig_hashes == NULL )
- return( -1 );
-
- for( cur = ssl->conf->sig_hashes; *cur != MBEDTLS_MD_NONE; cur++ )
- if( *cur == (int) md )
- return( 0 );
-
- return( -1 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-int mbedtls_ssl_check_cert_usage( const mbedtls_x509_crt *cert,
- const mbedtls_ssl_ciphersuite_t *ciphersuite,
- int cert_endpoint,
- uint32_t *flags )
-{
- int ret = 0;
-#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
- int usage = 0;
-#endif
-#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
- const char *ext_oid;
- size_t ext_len;
-#endif
-
-#if !defined(MBEDTLS_X509_CHECK_KEY_USAGE) && \
- !defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
- ((void) cert);
- ((void) cert_endpoint);
- ((void) flags);
-#endif
-
-#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
- if( cert_endpoint == MBEDTLS_SSL_IS_SERVER )
- {
- /* Server part of the key exchange */
- switch( ciphersuite->key_exchange )
- {
- case MBEDTLS_KEY_EXCHANGE_RSA:
- case MBEDTLS_KEY_EXCHANGE_RSA_PSK:
- usage = MBEDTLS_X509_KU_KEY_ENCIPHERMENT;
- break;
-
- case MBEDTLS_KEY_EXCHANGE_DHE_RSA:
- case MBEDTLS_KEY_EXCHANGE_ECDHE_RSA:
- case MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA:
- usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE;
- break;
-
- case MBEDTLS_KEY_EXCHANGE_ECDH_RSA:
- case MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA:
- usage = MBEDTLS_X509_KU_KEY_AGREEMENT;
- break;
-
- /* Don't use default: we want warnings when adding new values */
- case MBEDTLS_KEY_EXCHANGE_NONE:
- case MBEDTLS_KEY_EXCHANGE_PSK:
- case MBEDTLS_KEY_EXCHANGE_DHE_PSK:
- case MBEDTLS_KEY_EXCHANGE_ECDHE_PSK:
- case MBEDTLS_KEY_EXCHANGE_ECJPAKE:
- usage = 0;
- }
- }
- else
- {
- /* Client auth: we only implement rsa_sign and mbedtls_ecdsa_sign for now */
- usage = MBEDTLS_X509_KU_DIGITAL_SIGNATURE;
- }
-
- if( mbedtls_x509_crt_check_key_usage( cert, usage ) != 0 )
- {
- *flags |= MBEDTLS_X509_BADCERT_KEY_USAGE;
- ret = -1;
- }
-#else
- ((void) ciphersuite);
-#endif /* MBEDTLS_X509_CHECK_KEY_USAGE */
-
-#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
- if( cert_endpoint == MBEDTLS_SSL_IS_SERVER )
- {
- ext_oid = MBEDTLS_OID_SERVER_AUTH;
- ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_SERVER_AUTH );
- }
- else
- {
- ext_oid = MBEDTLS_OID_CLIENT_AUTH;
- ext_len = MBEDTLS_OID_SIZE( MBEDTLS_OID_CLIENT_AUTH );
- }
-
- if( mbedtls_x509_crt_check_extended_key_usage( cert, ext_oid, ext_len ) != 0 )
- {
- *flags |= MBEDTLS_X509_BADCERT_EXT_KEY_USAGE;
- ret = -1;
- }
-#endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */
-
- return( ret );
-}
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-int mbedtls_ssl_set_calc_verify_md( mbedtls_ssl_context *ssl, int md )
-{
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
- return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
-
- switch( md )
- {
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1)
-#if defined(MBEDTLS_MD5_C)
- case MBEDTLS_SSL_HASH_MD5:
- return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
-#endif
-#if defined(MBEDTLS_SHA1_C)
- case MBEDTLS_SSL_HASH_SHA1:
- ssl->handshake->calc_verify = ssl_calc_verify_tls;
- break;
-#endif
-#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 */
-#if defined(MBEDTLS_SHA512_C)
- case MBEDTLS_SSL_HASH_SHA384:
- ssl->handshake->calc_verify = ssl_calc_verify_tls_sha384;
- break;
-#endif
-#if defined(MBEDTLS_SHA256_C)
- case MBEDTLS_SSL_HASH_SHA256:
- ssl->handshake->calc_verify = ssl_calc_verify_tls_sha256;
- break;
-#endif
- default:
- return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
- }
-
- return 0;
-#else /* !MBEDTLS_SSL_PROTO_TLS1_2 */
- (void) ssl;
- (void) md;
-
- return MBEDTLS_ERR_SSL_INVALID_VERIFY_HASH;
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-}
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
-int mbedtls_ssl_get_key_exchange_md_ssl_tls( mbedtls_ssl_context *ssl,
- unsigned char *output,
- unsigned char *data, size_t data_len )
-{
- int ret = 0;
- mbedtls_md5_context mbedtls_md5;
- mbedtls_sha1_context mbedtls_sha1;
-
- mbedtls_md5_init( &mbedtls_md5 );
- mbedtls_sha1_init( &mbedtls_sha1 );
-
- /*
- * digitally-signed struct {
- * opaque md5_hash[16];
- * opaque sha_hash[20];
- * };
- *
- * md5_hash
- * MD5(ClientHello.random + ServerHello.random
- * + ServerParams);
- * sha_hash
- * SHA(ClientHello.random + ServerHello.random
- * + ServerParams);
- */
- if( ( ret = mbedtls_md5_starts_ret( &mbedtls_md5 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md5_starts_ret", ret );
- goto exit;
- }
- if( ( ret = mbedtls_md5_update_ret( &mbedtls_md5,
- ssl->handshake->randbytes, 64 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md5_update_ret", ret );
- goto exit;
- }
- if( ( ret = mbedtls_md5_update_ret( &mbedtls_md5, data, data_len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md5_update_ret", ret );
- goto exit;
- }
- if( ( ret = mbedtls_md5_finish_ret( &mbedtls_md5, output ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md5_finish_ret", ret );
- goto exit;
- }
-
- if( ( ret = mbedtls_sha1_starts_ret( &mbedtls_sha1 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_sha1_starts_ret", ret );
- goto exit;
- }
- if( ( ret = mbedtls_sha1_update_ret( &mbedtls_sha1,
- ssl->handshake->randbytes, 64 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_sha1_update_ret", ret );
- goto exit;
- }
- if( ( ret = mbedtls_sha1_update_ret( &mbedtls_sha1, data,
- data_len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_sha1_update_ret", ret );
- goto exit;
- }
- if( ( ret = mbedtls_sha1_finish_ret( &mbedtls_sha1,
- output + 16 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_sha1_finish_ret", ret );
- goto exit;
- }
-
-exit:
- mbedtls_md5_free( &mbedtls_md5 );
- mbedtls_sha1_free( &mbedtls_sha1 );
-
- if( ret != 0 )
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
-
- return( ret );
-
-}
-#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 || \
- MBEDTLS_SSL_PROTO_TLS1_1 */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_2)
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-int mbedtls_ssl_get_key_exchange_md_tls1_2( mbedtls_ssl_context *ssl,
- unsigned char *hash, size_t *hashlen,
- unsigned char *data, size_t data_len,
- mbedtls_md_type_t md_alg )
-{
- psa_status_t status;
- psa_hash_operation_t hash_operation = PSA_HASH_OPERATION_INIT;
- psa_algorithm_t hash_alg = mbedtls_psa_translate_md( md_alg );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Perform PSA-based computation of digest of ServerKeyExchange" ) );
-
- if( ( status = psa_hash_setup( &hash_operation,
- hash_alg ) ) != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "psa_hash_setup", status );
- goto exit;
- }
-
- if( ( status = psa_hash_update( &hash_operation, ssl->handshake->randbytes,
- 64 ) ) != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "psa_hash_update", status );
- goto exit;
- }
-
- if( ( status = psa_hash_update( &hash_operation,
- data, data_len ) ) != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "psa_hash_update", status );
- goto exit;
- }
-
- if( ( status = psa_hash_finish( &hash_operation, hash, MBEDTLS_MD_MAX_SIZE,
- hashlen ) ) != PSA_SUCCESS )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "psa_hash_finish", status );
- goto exit;
- }
-
-exit:
- if( status != PSA_SUCCESS )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
- switch( status )
- {
- case PSA_ERROR_NOT_SUPPORTED:
- return( MBEDTLS_ERR_MD_FEATURE_UNAVAILABLE );
- case PSA_ERROR_BAD_STATE: /* Intentional fallthrough */
- case PSA_ERROR_BUFFER_TOO_SMALL:
- return( MBEDTLS_ERR_MD_BAD_INPUT_DATA );
- case PSA_ERROR_INSUFFICIENT_MEMORY:
- return( MBEDTLS_ERR_MD_ALLOC_FAILED );
- default:
- return( MBEDTLS_ERR_MD_HW_ACCEL_FAILED );
- }
- }
- return( 0 );
-}
-
-#else
-
-int mbedtls_ssl_get_key_exchange_md_tls1_2( mbedtls_ssl_context *ssl,
- unsigned char *hash, size_t *hashlen,
- unsigned char *data, size_t data_len,
- mbedtls_md_type_t md_alg )
-{
- int ret = 0;
- mbedtls_md_context_t ctx;
- const mbedtls_md_info_t *md_info = mbedtls_md_info_from_type( md_alg );
- *hashlen = mbedtls_md_get_size( md_info );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Perform mbedtls-based computation of digest of ServerKeyExchange" ) );
-
- mbedtls_md_init( &ctx );
-
- /*
- * digitally-signed struct {
- * opaque client_random[32];
- * opaque server_random[32];
- * ServerDHParams params;
- * };
- */
- if( ( ret = mbedtls_md_setup( &ctx, md_info, 0 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_setup", ret );
- goto exit;
- }
- if( ( ret = mbedtls_md_starts( &ctx ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_starts", ret );
- goto exit;
- }
- if( ( ret = mbedtls_md_update( &ctx, ssl->handshake->randbytes, 64 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_update", ret );
- goto exit;
- }
- if( ( ret = mbedtls_md_update( &ctx, data, data_len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_update", ret );
- goto exit;
- }
- if( ( ret = mbedtls_md_finish( &ctx, hash ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_md_finish", ret );
- goto exit;
- }
-
-exit:
- mbedtls_md_free( &ctx );
-
- if( ret != 0 )
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
-
- return( ret );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \
- MBEDTLS_SSL_PROTO_TLS1_2 */
-
#endif /* MBEDTLS_SSL_TLS_C */
diff --git a/library/ssl_12_srv.c b/library/ssl_12_srv.c
index b0b09cd..b2ad726 100644
--- a/library/ssl_12_srv.c
+++ b/library/ssl_12_srv.c
@@ -1,5 +1,6 @@
/*
- * SSLv3/TLSv1 server-side functions
+ * Server-specific handshake reading/writing functions
+ * for TLS versions <= 1.2.
*
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
* SPDX-License-Identifier: Apache-2.0
@@ -51,35 +52,157 @@
#include "mbedtls/platform_time.h"
#endif
-#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
-int mbedtls_ssl_set_client_transport_id( mbedtls_ssl_context *ssl,
- const unsigned char *info,
- size_t ilen )
+/* Forward declarations for state-specific handshake functions. */
+static int ssl_parse_client_hello( mbedtls_ssl_context *ssl );
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+static int ssl_write_hello_verify_request( mbedtls_ssl_context *ssl );
+#endif /* MBEDTLS_SSL_PROTO_DTLS */
+static int ssl_write_server_hello( mbedtls_ssl_context *ssl );
+static int ssl_write_certificate_request( mbedtls_ssl_context *ssl );
+static int ssl_write_server_key_exchange( mbedtls_ssl_context *ssl );
+static int ssl_write_server_hello_done( mbedtls_ssl_context *ssl );
+static int ssl_parse_client_key_exchange( mbedtls_ssl_context *ssl );
+static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl );
+#if defined(MBEDTLS_SSL_SESSION_TICKETS)
+static int ssl_write_new_session_ticket( mbedtls_ssl_context *ssl );
+#endif /* MBEDTLS_SSL_SESSION_TICKETS */
+
+/*
+ * Server-side handshake state machine
+ *
+ * This function performs a single step in a server-side TLS <= 1.2 handshake.
+ */
+int mbedtls_ssl_handshake_server_step( mbedtls_ssl_context *ssl )
{
- if( ssl->conf->endpoint != MBEDTLS_SSL_IS_SERVER )
+ int ret = 0;
+
+ if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- mbedtls_free( ssl->cli_id );
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "server state: %d", ssl->state ) );
- if( ( ssl->cli_id = mbedtls_calloc( 1, ilen ) ) == NULL )
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
+ if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
+ return( ret );
- memcpy( ssl->cli_id, info, ilen );
- ssl->cli_id_len = ilen;
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+ if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
+ ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
+ {
+ if( ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
+ return( ret );
+ }
+#endif /* MBEDTLS_SSL_PROTO_DTLS */
- return( 0 );
+ switch( ssl->state )
+ {
+ case MBEDTLS_SSL_HELLO_REQUEST:
+ ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
+ break;
+
+ /*
+ * <== ClientHello
+ */
+ case MBEDTLS_SSL_CLIENT_HELLO:
+ ret = ssl_parse_client_hello( ssl );
+ break;
+
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+ case MBEDTLS_SSL_SERVER_HELLO_VERIFY_REQUEST_SENT:
+ return( MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED );
+#endif
+
+ /*
+ * ==> ServerHello
+ * Certificate
+ * ( ServerKeyExchange )
+ * ( CertificateRequest )
+ * ServerHelloDone
+ */
+ case MBEDTLS_SSL_SERVER_HELLO:
+ ret = ssl_write_server_hello( ssl );
+ break;
+
+ case MBEDTLS_SSL_SERVER_CERTIFICATE:
+ ret = mbedtls_ssl_write_certificate( ssl );
+ break;
+
+ case MBEDTLS_SSL_SERVER_KEY_EXCHANGE:
+ ret = ssl_write_server_key_exchange( ssl );
+ break;
+
+ case MBEDTLS_SSL_CERTIFICATE_REQUEST:
+ ret = ssl_write_certificate_request( ssl );
+ break;
+
+ case MBEDTLS_SSL_SERVER_HELLO_DONE:
+ ret = ssl_write_server_hello_done( ssl );
+ break;
+
+ /*
+ * <== ( Certificate/Alert )
+ * ClientKeyExchange
+ * ( CertificateVerify )
+ * ChangeCipherSpec
+ * Finished
+ */
+ case MBEDTLS_SSL_CLIENT_CERTIFICATE:
+ ret = mbedtls_ssl_parse_certificate( ssl );
+ break;
+
+ case MBEDTLS_SSL_CLIENT_KEY_EXCHANGE:
+ ret = ssl_parse_client_key_exchange( ssl );
+ break;
+
+ case MBEDTLS_SSL_CERTIFICATE_VERIFY:
+ ret = ssl_parse_certificate_verify( ssl );
+ break;
+
+ case MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC:
+ ret = mbedtls_ssl_parse_change_cipher_spec( ssl );
+ break;
+
+ case MBEDTLS_SSL_CLIENT_FINISHED:
+ ret = mbedtls_ssl_parse_finished( ssl );
+ break;
+
+ /*
+ * ==> ( NewSessionTicket )
+ * ChangeCipherSpec
+ * Finished
+ */
+ case MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC:
+#if defined(MBEDTLS_SSL_SESSION_TICKETS)
+ if( ssl->handshake->new_session_ticket != 0 )
+ ret = ssl_write_new_session_ticket( ssl );
+ else
+#endif
+ ret = mbedtls_ssl_write_change_cipher_spec( ssl );
+ break;
+
+ case MBEDTLS_SSL_SERVER_FINISHED:
+ ret = mbedtls_ssl_write_finished( ssl );
+ break;
+
+ case MBEDTLS_SSL_FLUSH_BUFFERS:
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
+ ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
+ break;
+
+ case MBEDTLS_SSL_HANDSHAKE_WRAPUP:
+ mbedtls_ssl_handshake_wrapup( ssl );
+ break;
+
+ default:
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
+ return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+ }
+
+ return( ret );
}
-void mbedtls_ssl_conf_dtls_cookies( mbedtls_ssl_config *conf,
- mbedtls_ssl_cookie_write_t *f_cookie_write,
- mbedtls_ssl_cookie_check_t *f_cookie_check,
- void *p_cookie )
-{
- conf->f_cookie_write = f_cookie_write;
- conf->f_cookie_check = f_cookie_check;
- conf->p_cookie = p_cookie;
-}
-#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY */
+/*
+ * ClientHello/ServerHello extension functions.
+ */
#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
static int ssl_parse_servername_ext( mbedtls_ssl_context *ssl,
@@ -150,87 +273,8 @@
}
#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-static int ssl_conf_has_psk_or_cb( mbedtls_ssl_config const *conf )
-{
- if( conf->f_psk != NULL )
- return( 1 );
-
- if( conf->psk_identity_len == 0 || conf->psk_identity == NULL )
- return( 0 );
-
- if( conf->psk != NULL && conf->psk_len != 0 )
- return( 1 );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- if( conf->psk_opaque != 0 )
- return( 1 );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-static int ssl_use_opaque_psk( mbedtls_ssl_context const *ssl )
-{
- if( ssl->conf->f_psk != NULL )
- {
- /* If we've used a callback to select the PSK,
- * the static configuration is irrelevant. */
-
- if( ssl->handshake->psk_opaque != 0 )
- return( 1 );
-
- return( 0 );
- }
-
- if( ssl->conf->psk_opaque != 0 )
- return( 1 );
-
- return( 0 );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-static int ssl_parse_renegotiation_info( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- /* Check verify-data in constant-time. The length OTOH is no secret */
- if( len != 1 + ssl->verify_data_len ||
- buf[0] != ssl->verify_data_len ||
- mbedtls_ssl_safer_memcmp( buf + 1, ssl->peer_verify_data,
- ssl->verify_data_len ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- }
- else
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
- {
- if( len != 1 || buf[0] != 0x0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
- }
-
- return( 0 );
-}
-
#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-
/*
* Status of the implementation of signature-algorithms extension:
*
@@ -319,6 +363,82 @@
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
+static void ssl_write_renegotiation_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t *olen )
+{
+ unsigned char *p = buf;
+
+ if( ssl->secure_renegotiation != MBEDTLS_SSL_SECURE_RENEGOTIATION )
+ {
+ *olen = 0;
+ return;
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, secure renegotiation extension" ) );
+
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO ) & 0xFF );
+
+#if defined(MBEDTLS_SSL_RENEGOTIATION)
+ if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
+ {
+ *p++ = 0x00;
+ *p++ = ( ssl->verify_data_len * 2 + 1 ) & 0xFF;
+ *p++ = ssl->verify_data_len * 2 & 0xFF;
+
+ memcpy( p, ssl->peer_verify_data, ssl->verify_data_len );
+ p += ssl->verify_data_len;
+ memcpy( p, ssl->own_verify_data, ssl->verify_data_len );
+ p += ssl->verify_data_len;
+ }
+ else
+#endif /* MBEDTLS_SSL_RENEGOTIATION */
+ {
+ *p++ = 0x00;
+ *p++ = 0x01;
+ *p++ = 0x00;
+ }
+
+ *olen = p - buf;
+}
+
+static int ssl_parse_renegotiation_info( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+#if defined(MBEDTLS_SSL_RENEGOTIATION)
+ if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
+ {
+ /* Check verify-data in constant-time. The length OTOH is no secret */
+ if( len != 1 + ssl->verify_data_len ||
+ buf[0] != ssl->verify_data_len ||
+ mbedtls_ssl_safer_memcmp( buf + 1, ssl->peer_verify_data,
+ ssl->verify_data_len ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+ }
+ else
+#endif /* MBEDTLS_SSL_RENEGOTIATION */
+ {
+ if( len != 1 || buf[0] != 0x0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+
+ ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
+ }
+
+ return( 0 );
+}
+
#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
static int ssl_parse_supported_elliptic_curves( mbedtls_ssl_context *ssl,
@@ -387,6 +507,34 @@
return( 0 );
}
+static void ssl_write_supported_point_formats_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t *olen )
+{
+ unsigned char *p = buf;
+ ((void) ssl);
+
+ if( ( ssl->handshake->cli_exts &
+ MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS_PRESENT ) == 0 )
+ {
+ *olen = 0;
+ return;
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, supported_point_formats extension" ) );
+
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS ) & 0xFF );
+
+ *p++ = 0x00;
+ *p++ = 2;
+
+ *p++ = 1;
+ *p++ = MBEDTLS_ECP_PF_UNCOMPRESSED;
+
+ *olen = 6;
+}
+
static int ssl_parse_supported_point_formats( mbedtls_ssl_context *ssl,
const unsigned char *buf,
size_t len )
@@ -428,36 +576,32 @@
#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static int ssl_parse_ecjpake_kkpp( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- if( mbedtls_ecjpake_check( &ssl->handshake->ecjpake_ctx ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip ecjpake kkpp extension" ) );
- return( 0 );
- }
-
- if( ( ret = mbedtls_ecjpake_read_round_one( &ssl->handshake->ecjpake_ctx,
- buf, len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_one", ret );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( ret );
- }
-
- /* Only mark the extension as OK when we're sure it is */
- ssl->handshake->cli_exts |= MBEDTLS_TLS_EXT_ECJPAKE_KKPP_OK;
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
+static void ssl_write_max_fragment_length_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t *olen )
+{
+ unsigned char *p = buf;
+
+ if( ssl->session_negotiate->mfl_code == MBEDTLS_SSL_MAX_FRAG_LEN_NONE )
+ {
+ *olen = 0;
+ return;
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, max_fragment_length extension" ) );
+
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH ) & 0xFF );
+
+ *p++ = 0x00;
+ *p++ = 1;
+
+ *p++ = ssl->session_negotiate->mfl_code;
+
+ *olen = 5;
+}
+
static int ssl_parse_max_fragment_length_ext( mbedtls_ssl_context *ssl,
const unsigned char *buf,
size_t len )
@@ -477,6 +621,52 @@
#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
+static void ssl_write_cid_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t *olen )
+{
+ unsigned char *p = buf;
+ size_t ext_len;
+ const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
+
+ *olen = 0;
+
+ /* Skip writing the extension if we don't want to use it or if
+ * the client hasn't offered it. */
+ if( ssl->handshake->cid_in_use == MBEDTLS_SSL_CID_DISABLED )
+ return;
+
+ /* ssl->own_cid_len is at most MBEDTLS_SSL_CID_IN_LEN_MAX
+ * which is at most 255, so the increment cannot overflow. */
+ if( end < p || (size_t)( end - p ) < (unsigned)( ssl->own_cid_len + 5 ) )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
+ return;
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding CID extension" ) );
+
+ /*
+ * Quoting draft-ietf-tls-dtls-connection-id-05
+ * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05
+ *
+ * struct {
+ * opaque cid<0..2^8-1>;
+ * } ConnectionId;
+ */
+
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_CID >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_CID ) & 0xFF );
+ ext_len = (size_t) ssl->own_cid_len + 1;
+ *p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( ext_len ) & 0xFF );
+
+ *p++ = (uint8_t) ssl->own_cid_len;
+ memcpy( p, ssl->own_cid, ssl->own_cid_len );
+
+ *olen = ssl->own_cid_len + 5;
+}
+
static int ssl_parse_cid_ext( mbedtls_ssl_context *ssl,
const unsigned char *buf,
size_t len )
@@ -549,6 +739,29 @@
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
+static void ssl_write_truncated_hmac_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t *olen )
+{
+ unsigned char *p = buf;
+
+ if( ssl->session_negotiate->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED )
+ {
+ *olen = 0;
+ return;
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding truncated hmac extension" ) );
+
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC ) & 0xFF );
+
+ *p++ = 0x00;
+ *p++ = 0x00;
+
+ *olen = 4;
+}
+
static int ssl_parse_truncated_hmac_ext( mbedtls_ssl_context *ssl,
const unsigned char *buf,
size_t len )
@@ -570,32 +783,32 @@
}
#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-static int ssl_parse_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ((void) buf);
-
- if( ssl->conf->encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED &&
- ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- ssl->session_negotiate->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-
#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
+static void ssl_write_extended_ms_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t *olen )
+{
+ unsigned char *p = buf;
+
+ if( ssl->handshake->extended_ms == MBEDTLS_SSL_EXTENDED_MS_DISABLED ||
+ ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
+ {
+ *olen = 0;
+ return;
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding extended master secret "
+ "extension" ) );
+
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET ) & 0xFF );
+
+ *p++ = 0x00;
+ *p++ = 0x00;
+
+ *olen = 4;
+}
+
static int ssl_parse_extended_ms_ext( mbedtls_ssl_context *ssl,
const unsigned char *buf,
size_t len )
@@ -620,81 +833,107 @@
}
#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-static int ssl_parse_session_ticket_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t len )
+#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
+static void ssl_write_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t *olen )
{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- mbedtls_ssl_session session;
+ unsigned char *p = buf;
+ const mbedtls_ssl_ciphersuite_t *suite = NULL;
+ const mbedtls_cipher_info_t *cipher = NULL;
- mbedtls_ssl_session_init( &session );
-
- if( ssl->conf->f_ticket_parse == NULL ||
- ssl->conf->f_ticket_write == NULL )
+ if( ssl->session_negotiate->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED ||
+ ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
{
- return( 0 );
- }
-
- /* Remember the client asked us to send a new ticket */
- ssl->handshake->new_session_ticket = 1;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket length: %d", len ) );
-
- if( len == 0 )
- return( 0 );
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket rejected: renegotiating" ) );
- return( 0 );
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
- /*
- * Failures are ok: just ignore the ticket and proceed.
- */
- if( ( ret = ssl->conf->f_ticket_parse( ssl->conf->p_ticket, &session,
- buf, len ) ) != 0 )
- {
- mbedtls_ssl_session_free( &session );
-
- if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket is not authentic" ) );
- else if( ret == MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED )
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket is expired" ) );
- else
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_ticket_parse", ret );
-
- return( 0 );
+ *olen = 0;
+ return;
}
/*
- * Keep the session ID sent by the client, since we MUST send it back to
- * inform them we're accepting the ticket (RFC 5077 section 3.4)
+ * RFC 7366: "If a server receives an encrypt-then-MAC request extension
+ * from a client and then selects a stream or Authenticated Encryption
+ * with Associated Data (AEAD) ciphersuite, it MUST NOT send an
+ * encrypt-then-MAC response extension back to the client."
*/
- session.id_len = ssl->session_negotiate->id_len;
- memcpy( &session.id, ssl->session_negotiate->id, session.id_len );
+ if( ( suite = mbedtls_ssl_ciphersuite_from_id(
+ ssl->session_negotiate->ciphersuite ) ) == NULL ||
+ ( cipher = mbedtls_cipher_info_from_type( suite->cipher ) ) == NULL ||
+ cipher->mode != MBEDTLS_MODE_CBC )
+ {
+ *olen = 0;
+ return;
+ }
- mbedtls_ssl_session_free( ssl->session_negotiate );
- memcpy( ssl->session_negotiate, &session, sizeof( mbedtls_ssl_session ) );
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding encrypt then mac extension" ) );
- /* Zeroize instead of free as we copied the content */
- mbedtls_platform_zeroize( &session, sizeof( mbedtls_ssl_session ) );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC ) & 0xFF );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "session successfully restored from ticket" ) );
+ *p++ = 0x00;
+ *p++ = 0x00;
- ssl->handshake->resume = 1;
+ *olen = 4;
+}
- /* Don't send a new ticket after all, this one is OK */
- ssl->handshake->new_session_ticket = 0;
+static int ssl_parse_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ if( len != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+
+ ((void) buf);
+
+ if( ssl->conf->encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED &&
+ ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_0 )
+ {
+ ssl->session_negotiate->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
+ }
return( 0 );
}
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
+#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
#if defined(MBEDTLS_SSL_ALPN)
+static void ssl_write_alpn_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf, size_t *olen )
+{
+ if( ssl->alpn_chosen == NULL )
+ {
+ *olen = 0;
+ return;
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding alpn extension" ) );
+
+ /*
+ * 0 . 1 ext identifier
+ * 2 . 3 ext length
+ * 4 . 5 protocol list length
+ * 6 . 6 protocol name length
+ * 7 . 7+n protocol name
+ */
+ buf[0] = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN >> 8 ) & 0xFF );
+ buf[1] = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN ) & 0xFF );
+
+ *olen = 7 + strlen( ssl->alpn_chosen );
+
+ buf[2] = (unsigned char)( ( ( *olen - 4 ) >> 8 ) & 0xFF );
+ buf[3] = (unsigned char)( ( ( *olen - 4 ) ) & 0xFF );
+
+ buf[4] = (unsigned char)( ( ( *olen - 6 ) >> 8 ) & 0xFF );
+ buf[5] = (unsigned char)( ( ( *olen - 6 ) ) & 0xFF );
+
+ buf[6] = (unsigned char)( ( ( *olen - 7 ) ) & 0xFF );
+
+ memcpy( buf + 7, ssl->alpn_chosen, *olen - 7 );
+}
+
static int ssl_parse_alpn_ext( mbedtls_ssl_context *ssl,
const unsigned char *buf, size_t len )
{
@@ -782,6 +1021,235 @@
}
#endif /* MBEDTLS_SSL_ALPN */
+#if defined(MBEDTLS_SSL_SESSION_TICKETS)
+static void ssl_write_session_ticket_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t *olen )
+{
+ unsigned char *p = buf;
+
+ if( ssl->handshake->new_session_ticket == 0 )
+ {
+ *olen = 0;
+ return;
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding session ticket extension" ) );
+
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET ) & 0xFF );
+
+ *p++ = 0x00;
+ *p++ = 0x00;
+
+ *olen = 4;
+}
+
+static int ssl_parse_session_ticket_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t len )
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ mbedtls_ssl_session session;
+
+ mbedtls_ssl_session_init( &session );
+
+ if( ssl->conf->f_ticket_parse == NULL ||
+ ssl->conf->f_ticket_write == NULL )
+ {
+ return( 0 );
+ }
+
+ /* Remember the client asked us to send a new ticket */
+ ssl->handshake->new_session_ticket = 1;
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket length: %d", len ) );
+
+ if( len == 0 )
+ return( 0 );
+
+#if defined(MBEDTLS_SSL_RENEGOTIATION)
+ if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket rejected: renegotiating" ) );
+ return( 0 );
+ }
+#endif /* MBEDTLS_SSL_RENEGOTIATION */
+
+ /*
+ * Failures are ok: just ignore the ticket and proceed.
+ */
+ if( ( ret = ssl->conf->f_ticket_parse( ssl->conf->p_ticket, &session,
+ buf, len ) ) != 0 )
+ {
+ mbedtls_ssl_session_free( &session );
+
+ if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket is not authentic" ) );
+ else if( ret == MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED )
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket is expired" ) );
+ else
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_ticket_parse", ret );
+
+ return( 0 );
+ }
+
+ /*
+ * Keep the session ID sent by the client, since we MUST send it back to
+ * inform them we're accepting the ticket (RFC 5077 section 3.4)
+ */
+ session.id_len = ssl->session_negotiate->id_len;
+ memcpy( &session.id, ssl->session_negotiate->id, session.id_len );
+
+ mbedtls_ssl_session_free( ssl->session_negotiate );
+ memcpy( ssl->session_negotiate, &session, sizeof( mbedtls_ssl_session ) );
+
+ /* Zeroize instead of free as we copied the content */
+ mbedtls_platform_zeroize( &session, sizeof( mbedtls_ssl_session ) );
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "session successfully restored from ticket" ) );
+
+ ssl->handshake->resume = 1;
+
+ /* Don't send a new ticket after all, this one is OK */
+ ssl->handshake->new_session_ticket = 0;
+
+ return( 0 );
+}
+#endif /* MBEDTLS_SSL_SESSION_TICKETS */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
+static void ssl_write_ecjpake_kkpp_ext( mbedtls_ssl_context *ssl,
+ unsigned char *buf,
+ size_t *olen )
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ unsigned char *p = buf;
+ const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
+ size_t kkpp_len;
+
+ *olen = 0;
+
+ /* Skip costly computation if not needed */
+ if( ssl->handshake->ciphersuite_info->key_exchange !=
+ MBEDTLS_KEY_EXCHANGE_ECJPAKE )
+ return;
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, ecjpake kkpp extension" ) );
+
+ if( end - p < 4 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
+ return;
+ }
+
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP ) & 0xFF );
+
+ ret = mbedtls_ecjpake_write_round_one( &ssl->handshake->ecjpake_ctx,
+ p + 2, end - p - 2, &kkpp_len,
+ ssl->conf->f_rng, ssl->conf->p_rng );
+ if( ret != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1 , "mbedtls_ecjpake_write_round_one", ret );
+ return;
+ }
+
+ *p++ = (unsigned char)( ( kkpp_len >> 8 ) & 0xFF );
+ *p++ = (unsigned char)( ( kkpp_len ) & 0xFF );
+
+ *olen = kkpp_len + 4;
+}
+
+static int ssl_parse_ecjpake_kkpp( mbedtls_ssl_context *ssl,
+ const unsigned char *buf,
+ size_t len )
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+
+ if( mbedtls_ecjpake_check( &ssl->handshake->ecjpake_ctx ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip ecjpake kkpp extension" ) );
+ return( 0 );
+ }
+
+ if( ( ret = mbedtls_ecjpake_read_round_one( &ssl->handshake->ecjpake_ctx,
+ buf, len ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_one", ret );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
+ return( ret );
+ }
+
+ /* Only mark the extension as OK when we're sure it is */
+ ssl->handshake->cli_exts |= MBEDTLS_TLS_EXT_ECJPAKE_KKPP_OK;
+
+ return( 0 );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
+
+
+
+
+
+
+
+
+
+
+
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
+static int ssl_conf_has_psk_or_cb( mbedtls_ssl_config const *conf )
+{
+ if( conf->f_psk != NULL )
+ return( 1 );
+
+ if( conf->psk_identity_len == 0 || conf->psk_identity == NULL )
+ return( 0 );
+
+ if( conf->psk != NULL && conf->psk_len != 0 )
+ return( 1 );
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+ if( conf->psk_opaque != 0 )
+ return( 1 );
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
+ return( 0 );
+}
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+static int ssl_use_opaque_psk( mbedtls_ssl_context const *ssl )
+{
+ if( ssl->conf->f_psk != NULL )
+ {
+ /* If we've used a callback to select the PSK,
+ * the static configuration is irrelevant. */
+
+ if( ssl->handshake->psk_opaque != 0 )
+ return( 1 );
+
+ return( 0 );
+ }
+
+ if( ssl->conf->psk_opaque != 0 )
+ return( 1 );
+
+ return( 0 );
+}
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
+
+
+
+
+
+
+
+
+
+
/*
* Auxiliary functions for ServerHello parsing and related actions
*/
@@ -912,385 +1380,16 @@
#endif /* MBEDTLS_X509_CRT_PARSE_C */
/*
- * Check if a given ciphersuite is suitable for use with our config/keys/etc
- * Sets ciphersuite_info only if the suite matches.
+ * SERVER HANDSHAKE STATE: Incoming `ClientHello`
*/
-static int ssl_ciphersuite_match( mbedtls_ssl_context *ssl, int suite_id,
- const mbedtls_ssl_ciphersuite_t **ciphersuite_info )
-{
- const mbedtls_ssl_ciphersuite_t *suite_info;
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- mbedtls_pk_type_t sig_type;
-#endif
-
- suite_info = mbedtls_ssl_ciphersuite_from_id( suite_id );
- if( suite_info == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "trying ciphersuite: %s", suite_info->name ) );
-
- if( suite_info->min_minor_ver > ssl->minor_ver ||
- suite_info->max_minor_ver < ssl->minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: version" ) );
- return( 0 );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ( suite_info->flags & MBEDTLS_CIPHERSUITE_NODTLS ) )
- return( 0 );
-#endif
-
-#if defined(MBEDTLS_ARC4_C)
- if( ssl->conf->arc4_disabled == MBEDTLS_SSL_ARC4_DISABLED &&
- suite_info->cipher == MBEDTLS_CIPHER_ARC4_128 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: rc4" ) );
- return( 0 );
- }
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( suite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE &&
- ( ssl->handshake->cli_exts & MBEDTLS_TLS_EXT_ECJPAKE_KKPP_OK ) == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: ecjpake "
- "not configured or ext missing" ) );
- return( 0 );
- }
-#endif
-
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
- if( mbedtls_ssl_ciphersuite_uses_ec( suite_info ) &&
- ( ssl->handshake->curves == NULL ||
- ssl->handshake->curves[0] == NULL ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: "
- "no common elliptic curve" ) );
- return( 0 );
- }
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
- /* If the ciphersuite requires a pre-shared key and we don't
- * have one, skip it now rather than failing later */
- if( mbedtls_ssl_ciphersuite_uses_psk( suite_info ) &&
- ssl_conf_has_psk_or_cb( ssl->conf ) == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: no pre-shared key" ) );
- return( 0 );
- }
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- /* If the ciphersuite requires signing, check whether
- * a suitable hash algorithm is present. */
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- sig_type = mbedtls_ssl_get_ciphersuite_sig_alg( suite_info );
- if( sig_type != MBEDTLS_PK_NONE &&
- mbedtls_ssl_sig_hash_set_find( &ssl->handshake->hash_algs, sig_type ) == MBEDTLS_MD_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: no suitable hash algorithm "
- "for signature algorithm %d", sig_type ) );
- return( 0 );
- }
- }
-
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
- MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- /*
- * Final check: if ciphersuite requires us to have a
- * certificate/key of a particular type:
- * - select the appropriate certificate if we have one, or
- * - try the next ciphersuite if we don't
- * This must be done last since we modify the key_cert list.
- */
- if( ssl_pick_cert( ssl, suite_info ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: "
- "no suitable certificate" ) );
- return( 0 );
- }
-#endif
-
- *ciphersuite_info = suite_info;
- return( 0 );
-}
#if defined(MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO)
-static int ssl_parse_client_hello_v2( mbedtls_ssl_context *ssl )
-{
- int ret, got_common_suite;
- unsigned int i, j;
- size_t n;
- unsigned int ciph_len, sess_len, chal_len;
- unsigned char *buf, *p;
- const int *ciphersuites;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse client hello v2" ) );
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "client hello v2 illegal for renegotiation" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
- buf = ssl->in_hdr;
-
- MBEDTLS_SSL_DEBUG_BUF( 4, "record header", buf, 5 );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v2, message type: %d",
- buf[2] ) );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v2, message len.: %d",
- ( ( buf[0] & 0x7F ) << 8 ) | buf[1] ) );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v2, max. version: [%d:%d]",
- buf[3], buf[4] ) );
-
- /*
- * SSLv2 Client Hello
- *
- * Record layer:
- * 0 . 1 message length
- *
- * SSL layer:
- * 2 . 2 message type
- * 3 . 4 protocol version
- */
- if( buf[2] != MBEDTLS_SSL_HS_CLIENT_HELLO ||
- buf[3] != MBEDTLS_SSL_MAJOR_VERSION_3 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- n = ( ( buf[0] << 8 ) | buf[1] ) & 0x7FFF;
-
- if( n < 17 || n > 512 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ssl->major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
- ssl->minor_ver = ( buf[4] <= ssl->conf->max_minor_ver )
- ? buf[4] : ssl->conf->max_minor_ver;
-
- if( ssl->minor_ver < ssl->conf->min_minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "client only supports ssl smaller than minimum"
- " [%d:%d] < [%d:%d]",
- ssl->major_ver, ssl->minor_ver,
- ssl->conf->min_major_ver, ssl->conf->min_minor_ver ) );
-
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
- return( MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
- }
-
- ssl->handshake->max_major_ver = buf[3];
- ssl->handshake->max_minor_ver = buf[4];
-
- if( ( ret = mbedtls_ssl_fetch_input( ssl, 2 + n ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
- return( ret );
- }
-
- ssl->handshake->update_checksum( ssl, buf + 2, n );
-
- buf = ssl->in_msg;
- n = ssl->in_left - 5;
-
- /*
- * 0 . 1 ciphersuitelist length
- * 2 . 3 session id length
- * 4 . 5 challenge length
- * 6 . .. ciphersuitelist
- * .. . .. session id
- * .. . .. challenge
- */
- MBEDTLS_SSL_DEBUG_BUF( 4, "record contents", buf, n );
-
- ciph_len = ( buf[0] << 8 ) | buf[1];
- sess_len = ( buf[2] << 8 ) | buf[3];
- chal_len = ( buf[4] << 8 ) | buf[5];
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciph_len: %d, sess_len: %d, chal_len: %d",
- ciph_len, sess_len, chal_len ) );
-
- /*
- * Make sure each parameter length is valid
- */
- if( ciph_len < 3 || ( ciph_len % 3 ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- if( sess_len > 32 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- if( chal_len < 8 || chal_len > 32 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- if( n != 6 + ciph_len + sess_len + chal_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, ciphersuitelist",
- buf + 6, ciph_len );
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, session id",
- buf + 6 + ciph_len, sess_len );
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, challenge",
- buf + 6 + ciph_len + sess_len, chal_len );
-
- p = buf + 6 + ciph_len;
- ssl->session_negotiate->id_len = sess_len;
- memset( ssl->session_negotiate->id, 0,
- sizeof( ssl->session_negotiate->id ) );
- memcpy( ssl->session_negotiate->id, p, ssl->session_negotiate->id_len );
-
- p += sess_len;
- memset( ssl->handshake->randbytes, 0, 64 );
- memcpy( ssl->handshake->randbytes + 32 - chal_len, p, chal_len );
-
- /*
- * Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV
- */
- for( i = 0, p = buf + 6; i < ciph_len; i += 3, p += 3 )
- {
- if( p[0] == 0 && p[1] == 0 && p[2] == MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "received TLS_EMPTY_RENEGOTIATION_INFO " ) );
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "received RENEGOTIATION SCSV "
- "during renegotiation" ) );
-
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
- ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
- break;
- }
- }
-
-#if defined(MBEDTLS_SSL_FALLBACK_SCSV)
- for( i = 0, p = buf + 6; i < ciph_len; i += 3, p += 3 )
- {
- if( p[0] == 0 &&
- p[1] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE >> 8 ) & 0xff ) &&
- p[2] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE ) & 0xff ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "received FALLBACK_SCSV" ) );
-
- if( ssl->minor_ver < ssl->conf->max_minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "inapropriate fallback" ) );
-
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INAPROPRIATE_FALLBACK );
-
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- break;
- }
- }
-#endif /* MBEDTLS_SSL_FALLBACK_SCSV */
-
- got_common_suite = 0;
- ciphersuites = ssl->conf->ciphersuite_list[ssl->minor_ver];
- ciphersuite_info = NULL;
-#if defined(MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
- for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
- for( i = 0; ciphersuites[i] != 0; i++ )
-#else
- for( i = 0; ciphersuites[i] != 0; i++ )
- for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
-#endif
- {
- if( p[0] != 0 ||
- p[1] != ( ( ciphersuites[i] >> 8 ) & 0xFF ) ||
- p[2] != ( ( ciphersuites[i] ) & 0xFF ) )
- continue;
-
- got_common_suite = 1;
-
- if( ( ret = ssl_ciphersuite_match( ssl, ciphersuites[i],
- &ciphersuite_info ) ) != 0 )
- return( ret );
-
- if( ciphersuite_info != NULL )
- goto have_ciphersuite_v2;
- }
-
- if( got_common_suite )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got ciphersuites in common, "
- "but none of them usable" ) );
- return( MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE );
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no ciphersuites in common" ) );
- return( MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN );
- }
-
-have_ciphersuite_v2:
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "selected ciphersuite: %s", ciphersuite_info->name ) );
-
- ssl->session_negotiate->ciphersuite = ciphersuites[i];
- ssl->handshake->ciphersuite_info = ciphersuite_info;
-
- /*
- * SSLv2 Client Hello relevant renegotiation security checks
- */
- if( ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
- ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation, breaking off handshake" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ssl->in_left = 0;
- ssl->state++;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse client hello v2" ) );
-
- return( 0 );
-}
+static int ssl_parse_client_hello_v2( mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO */
+static int ssl_ciphersuite_match( mbedtls_ssl_context *ssl, int suite_id,
+ const mbedtls_ssl_ciphersuite_t **ciphersuite_info );
+
/* This function doesn't alert on errors that happen early during
ClientHello parsing because they might indicate that the client is
not talking SSL/TLS at all and would not understand our alert. */
@@ -2158,351 +2257,389 @@
return( 0 );
}
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-static void ssl_write_truncated_hmac_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
+/*
+ * Check if a given ciphersuite is suitable for use with our config/keys/etc
+ * Sets ciphersuite_info only if the suite matches.
+ */
+static int ssl_ciphersuite_match( mbedtls_ssl_context *ssl, int suite_id,
+ const mbedtls_ssl_ciphersuite_t **ciphersuite_info )
{
- unsigned char *p = buf;
+ const mbedtls_ssl_ciphersuite_t *suite_info;
- if( ssl->session_negotiate->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED )
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+ defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+ mbedtls_pk_type_t sig_type;
+#endif
+
+ suite_info = mbedtls_ssl_ciphersuite_from_id( suite_id );
+ if( suite_info == NULL )
{
- *olen = 0;
- return;
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding truncated hmac extension" ) );
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "trying ciphersuite: %s", suite_info->name ) );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-static void ssl_write_cid_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- size_t ext_len;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
-
- *olen = 0;
-
- /* Skip writing the extension if we don't want to use it or if
- * the client hasn't offered it. */
- if( ssl->handshake->cid_in_use == MBEDTLS_SSL_CID_DISABLED )
- return;
-
- /* ssl->own_cid_len is at most MBEDTLS_SSL_CID_IN_LEN_MAX
- * which is at most 255, so the increment cannot overflow. */
- if( end < p || (size_t)( end - p ) < (unsigned)( ssl->own_cid_len + 5 ) )
+ if( suite_info->min_minor_ver > ssl->minor_ver ||
+ suite_info->max_minor_ver < ssl->minor_ver )
{
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: version" ) );
+ return( 0 );
}
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding CID extension" ) );
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+ if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
+ ( suite_info->flags & MBEDTLS_CIPHERSUITE_NODTLS ) )
+ return( 0 );
+#endif
+#if defined(MBEDTLS_ARC4_C)
+ if( ssl->conf->arc4_disabled == MBEDTLS_SSL_ARC4_DISABLED &&
+ suite_info->cipher == MBEDTLS_CIPHER_ARC4_128 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: rc4" ) );
+ return( 0 );
+ }
+#endif
+
+#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
+ if( suite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE &&
+ ( ssl->handshake->cli_exts & MBEDTLS_TLS_EXT_ECJPAKE_KKPP_OK ) == 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: ecjpake "
+ "not configured or ext missing" ) );
+ return( 0 );
+ }
+#endif
+
+
+#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
+ if( mbedtls_ssl_ciphersuite_uses_ec( suite_info ) &&
+ ( ssl->handshake->curves == NULL ||
+ ssl->handshake->curves[0] == NULL ) )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: "
+ "no common elliptic curve" ) );
+ return( 0 );
+ }
+#endif
+
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
+ /* If the ciphersuite requires a pre-shared key and we don't
+ * have one, skip it now rather than failing later */
+ if( mbedtls_ssl_ciphersuite_uses_psk( suite_info ) &&
+ ssl_conf_has_psk_or_cb( ssl->conf ) == 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: no pre-shared key" ) );
+ return( 0 );
+ }
+#endif
+
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
+ defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
+ /* If the ciphersuite requires signing, check whether
+ * a suitable hash algorithm is present. */
+ if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
+ {
+ sig_type = mbedtls_ssl_get_ciphersuite_sig_alg( suite_info );
+ if( sig_type != MBEDTLS_PK_NONE &&
+ mbedtls_ssl_sig_hash_set_find( &ssl->handshake->hash_algs, sig_type ) == MBEDTLS_MD_NONE )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: no suitable hash algorithm "
+ "for signature algorithm %d", sig_type ) );
+ return( 0 );
+ }
+ }
+
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
+ MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
+
+#if defined(MBEDTLS_X509_CRT_PARSE_C)
/*
- * Quoting draft-ietf-tls-dtls-connection-id-05
- * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05
- *
- * struct {
- * opaque cid<0..2^8-1>;
- * } ConnectionId;
- */
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_CID >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_CID ) & 0xFF );
- ext_len = (size_t) ssl->own_cid_len + 1;
- *p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ext_len ) & 0xFF );
-
- *p++ = (uint8_t) ssl->own_cid_len;
- memcpy( p, ssl->own_cid, ssl->own_cid_len );
-
- *olen = ssl->own_cid_len + 5;
-}
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-static void ssl_write_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- const mbedtls_ssl_ciphersuite_t *suite = NULL;
- const mbedtls_cipher_info_t *cipher = NULL;
-
- if( ssl->session_negotiate->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED ||
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- *olen = 0;
- return;
- }
-
- /*
- * RFC 7366: "If a server receives an encrypt-then-MAC request extension
- * from a client and then selects a stream or Authenticated Encryption
- * with Associated Data (AEAD) ciphersuite, it MUST NOT send an
- * encrypt-then-MAC response extension back to the client."
+ * Final check: if ciphersuite requires us to have a
+ * certificate/key of a particular type:
+ * - select the appropriate certificate if we have one, or
+ * - try the next ciphersuite if we don't
+ * This must be done last since we modify the key_cert list.
*/
- if( ( suite = mbedtls_ssl_ciphersuite_from_id(
- ssl->session_negotiate->ciphersuite ) ) == NULL ||
- ( cipher = mbedtls_cipher_info_from_type( suite->cipher ) ) == NULL ||
- cipher->mode != MBEDTLS_MODE_CBC )
+ if( ssl_pick_cert( ssl, suite_info ) != 0 )
{
- *olen = 0;
- return;
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: "
+ "no suitable certificate" ) );
+ return( 0 );
}
+#endif
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding encrypt then mac extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
+ *ciphersuite_info = suite_info;
+ return( 0 );
}
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
-static void ssl_write_extended_ms_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
+#if defined(MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO)
+static int ssl_parse_client_hello_v2( mbedtls_ssl_context *ssl )
{
- unsigned char *p = buf;
+ int ret, got_common_suite;
+ unsigned int i, j;
+ size_t n;
+ unsigned int ciph_len, sess_len, chal_len;
+ unsigned char *buf, *p;
+ const int *ciphersuites;
+ const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
- if( ssl->handshake->extended_ms == MBEDTLS_SSL_EXTENDED_MS_DISABLED ||
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding extended master secret "
- "extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-static void ssl_write_session_ticket_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->handshake->new_session_ticket == 0 )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding session ticket extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-static void ssl_write_renegotiation_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->secure_renegotiation != MBEDTLS_SSL_SECURE_RENEGOTIATION )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, secure renegotiation extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO ) & 0xFF );
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse client hello v2" ) );
#if defined(MBEDTLS_SSL_RENEGOTIATION)
if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
{
- *p++ = 0x00;
- *p++ = ( ssl->verify_data_len * 2 + 1 ) & 0xFF;
- *p++ = ssl->verify_data_len * 2 & 0xFF;
-
- memcpy( p, ssl->peer_verify_data, ssl->verify_data_len );
- p += ssl->verify_data_len;
- memcpy( p, ssl->own_verify_data, ssl->verify_data_len );
- p += ssl->verify_data_len;
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "client hello v2 illegal for renegotiation" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
}
- else
#endif /* MBEDTLS_SSL_RENEGOTIATION */
- {
- *p++ = 0x00;
- *p++ = 0x01;
- *p++ = 0x00;
- }
- *olen = p - buf;
-}
+ buf = ssl->in_hdr;
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-static void ssl_write_max_fragment_length_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
+ MBEDTLS_SSL_DEBUG_BUF( 4, "record header", buf, 5 );
- if( ssl->session_negotiate->mfl_code == MBEDTLS_SSL_MAX_FRAG_LEN_NONE )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, max_fragment_length extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 1;
-
- *p++ = ssl->session_negotiate->mfl_code;
-
- *olen = 5;
-}
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static void ssl_write_supported_point_formats_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- ((void) ssl);
-
- if( ( ssl->handshake->cli_exts &
- MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS_PRESENT ) == 0 )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, supported_point_formats extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 2;
-
- *p++ = 1;
- *p++ = MBEDTLS_ECP_PF_UNCOMPRESSED;
-
- *olen = 6;
-}
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C || MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static void ssl_write_ecjpake_kkpp_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- size_t kkpp_len;
-
- *olen = 0;
-
- /* Skip costly computation if not needed */
- if( ssl->handshake->ciphersuite_info->key_exchange !=
- MBEDTLS_KEY_EXCHANGE_ECJPAKE )
- return;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, ecjpake kkpp extension" ) );
-
- if( end - p < 4 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP ) & 0xFF );
-
- ret = mbedtls_ecjpake_write_round_one( &ssl->handshake->ecjpake_ctx,
- p + 2, end - p - 2, &kkpp_len,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1 , "mbedtls_ecjpake_write_round_one", ret );
- return;
- }
-
- *p++ = (unsigned char)( ( kkpp_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( kkpp_len ) & 0xFF );
-
- *olen = kkpp_len + 4;
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_SSL_ALPN )
-static void ssl_write_alpn_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- if( ssl->alpn_chosen == NULL )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding alpn extension" ) );
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v2, message type: %d",
+ buf[2] ) );
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v2, message len.: %d",
+ ( ( buf[0] & 0x7F ) << 8 ) | buf[1] ) );
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v2, max. version: [%d:%d]",
+ buf[3], buf[4] ) );
/*
- * 0 . 1 ext identifier
- * 2 . 3 ext length
- * 4 . 5 protocol list length
- * 6 . 6 protocol name length
- * 7 . 7+n protocol name
+ * SSLv2 Client Hello
+ *
+ * Record layer:
+ * 0 . 1 message length
+ *
+ * SSL layer:
+ * 2 . 2 message type
+ * 3 . 4 protocol version
*/
- buf[0] = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN >> 8 ) & 0xFF );
- buf[1] = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN ) & 0xFF );
+ if( buf[2] != MBEDTLS_SSL_HS_CLIENT_HELLO ||
+ buf[3] != MBEDTLS_SSL_MAJOR_VERSION_3 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
- *olen = 7 + strlen( ssl->alpn_chosen );
+ n = ( ( buf[0] << 8 ) | buf[1] ) & 0x7FFF;
- buf[2] = (unsigned char)( ( ( *olen - 4 ) >> 8 ) & 0xFF );
- buf[3] = (unsigned char)( ( ( *olen - 4 ) ) & 0xFF );
+ if( n < 17 || n > 512 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
- buf[4] = (unsigned char)( ( ( *olen - 6 ) >> 8 ) & 0xFF );
- buf[5] = (unsigned char)( ( ( *olen - 6 ) ) & 0xFF );
+ ssl->major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
+ ssl->minor_ver = ( buf[4] <= ssl->conf->max_minor_ver )
+ ? buf[4] : ssl->conf->max_minor_ver;
- buf[6] = (unsigned char)( ( ( *olen - 7 ) ) & 0xFF );
+ if( ssl->minor_ver < ssl->conf->min_minor_ver )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "client only supports ssl smaller than minimum"
+ " [%d:%d] < [%d:%d]",
+ ssl->major_ver, ssl->minor_ver,
+ ssl->conf->min_major_ver, ssl->conf->min_minor_ver ) );
- memcpy( buf + 7, ssl->alpn_chosen, *olen - 7 );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
+ return( MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
+ }
+
+ ssl->handshake->max_major_ver = buf[3];
+ ssl->handshake->max_minor_ver = buf[4];
+
+ if( ( ret = mbedtls_ssl_fetch_input( ssl, 2 + n ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
+ return( ret );
+ }
+
+ ssl->handshake->update_checksum( ssl, buf + 2, n );
+
+ buf = ssl->in_msg;
+ n = ssl->in_left - 5;
+
+ /*
+ * 0 . 1 ciphersuitelist length
+ * 2 . 3 session id length
+ * 4 . 5 challenge length
+ * 6 . .. ciphersuitelist
+ * .. . .. session id
+ * .. . .. challenge
+ */
+ MBEDTLS_SSL_DEBUG_BUF( 4, "record contents", buf, n );
+
+ ciph_len = ( buf[0] << 8 ) | buf[1];
+ sess_len = ( buf[2] << 8 ) | buf[3];
+ chal_len = ( buf[4] << 8 ) | buf[5];
+
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciph_len: %d, sess_len: %d, chal_len: %d",
+ ciph_len, sess_len, chal_len ) );
+
+ /*
+ * Make sure each parameter length is valid
+ */
+ if( ciph_len < 3 || ( ciph_len % 3 ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+
+ if( sess_len > 32 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+
+ if( chal_len < 8 || chal_len > 32 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+
+ if( n != 6 + ciph_len + sess_len + chal_len )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+
+ MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, ciphersuitelist",
+ buf + 6, ciph_len );
+ MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, session id",
+ buf + 6 + ciph_len, sess_len );
+ MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, challenge",
+ buf + 6 + ciph_len + sess_len, chal_len );
+
+ p = buf + 6 + ciph_len;
+ ssl->session_negotiate->id_len = sess_len;
+ memset( ssl->session_negotiate->id, 0,
+ sizeof( ssl->session_negotiate->id ) );
+ memcpy( ssl->session_negotiate->id, p, ssl->session_negotiate->id_len );
+
+ p += sess_len;
+ memset( ssl->handshake->randbytes, 0, 64 );
+ memcpy( ssl->handshake->randbytes + 32 - chal_len, p, chal_len );
+
+ /*
+ * Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV
+ */
+ for( i = 0, p = buf + 6; i < ciph_len; i += 3, p += 3 )
+ {
+ if( p[0] == 0 && p[1] == 0 && p[2] == MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "received TLS_EMPTY_RENEGOTIATION_INFO " ) );
+#if defined(MBEDTLS_SSL_RENEGOTIATION)
+ if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "received RENEGOTIATION SCSV "
+ "during renegotiation" ) );
+
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+#endif /* MBEDTLS_SSL_RENEGOTIATION */
+ ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
+ break;
+ }
+ }
+
+#if defined(MBEDTLS_SSL_FALLBACK_SCSV)
+ for( i = 0, p = buf + 6; i < ciph_len; i += 3, p += 3 )
+ {
+ if( p[0] == 0 &&
+ p[1] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE >> 8 ) & 0xff ) &&
+ p[2] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE ) & 0xff ) )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "received FALLBACK_SCSV" ) );
+
+ if( ssl->minor_ver < ssl->conf->max_minor_ver )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "inapropriate fallback" ) );
+
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_INAPROPRIATE_FALLBACK );
+
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+
+ break;
+ }
+ }
+#endif /* MBEDTLS_SSL_FALLBACK_SCSV */
+
+ got_common_suite = 0;
+ ciphersuites = ssl->conf->ciphersuite_list[ssl->minor_ver];
+ ciphersuite_info = NULL;
+#if defined(MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
+ for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
+ for( i = 0; ciphersuites[i] != 0; i++ )
+#else
+ for( i = 0; ciphersuites[i] != 0; i++ )
+ for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
+#endif
+ {
+ if( p[0] != 0 ||
+ p[1] != ( ( ciphersuites[i] >> 8 ) & 0xFF ) ||
+ p[2] != ( ( ciphersuites[i] ) & 0xFF ) )
+ continue;
+
+ got_common_suite = 1;
+
+ if( ( ret = ssl_ciphersuite_match( ssl, ciphersuites[i],
+ &ciphersuite_info ) ) != 0 )
+ return( ret );
+
+ if( ciphersuite_info != NULL )
+ goto have_ciphersuite_v2;
+ }
+
+ if( got_common_suite )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "got ciphersuites in common, "
+ "but none of them usable" ) );
+ return( MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE );
+ }
+ else
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no ciphersuites in common" ) );
+ return( MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN );
+ }
+
+have_ciphersuite_v2:
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "selected ciphersuite: %s", ciphersuite_info->name ) );
+
+ ssl->session_negotiate->ciphersuite = ciphersuites[i];
+ ssl->handshake->ciphersuite_info = ciphersuite_info;
+
+ /*
+ * SSLv2 Client Hello relevant renegotiation security checks
+ */
+ if( ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
+ ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation, breaking off handshake" ) );
+ mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
+ MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
+ }
+
+ ssl->in_left = 0;
+ ssl->state++;
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse client hello v2" ) );
+
+ return( 0 );
}
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C */
+#endif /* MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO */
+
+/*
+ * SERVER HANDSHAKE STATE: Outgoing `HelloVerifyRequest`
+ */
#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
static int ssl_write_hello_verify_request( mbedtls_ssl_context *ssl )
@@ -2576,6 +2713,10 @@
}
#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY */
+/*
+ * SERVER HANDSHAKE STATE: Outgoing `ServerHello`
+ */
+
static int ssl_write_server_hello( mbedtls_ssl_context *ssl )
{
#if defined(MBEDTLS_HAVE_TIME)
@@ -2816,218 +2957,133 @@
return( ret );
}
-#if !defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
-static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
+/*
+ * SERVER HANDSHAKE STATE: Outgoing `Certificate`
+ *
+ * This is shared with the client-side and implemented in ssl_12_gen.c.
+ */
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate request" ) );
+/*
+ * SERVER HANDSHAKE STATE: Outgoing `ServerKeyExchange`
+ */
- if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate request" ) );
- ssl->state++;
- return( 0 );
- }
+static int ssl_prepare_server_key_exchange( mbedtls_ssl_context *ssl,
+ size_t *signature_len );
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-}
-#else /* !MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
-static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
- size_t dn_size, total_dn_size; /* excluding length bytes */
- size_t ct_len, sa_len; /* including length bytes */
- unsigned char *buf, *p;
- const unsigned char * const end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- const mbedtls_x509_crt *crt;
- int authmode;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate request" ) );
-
- ssl->state++;
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- if( ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET )
- authmode = ssl->handshake->sni_authmode;
- else
-#endif
- authmode = ssl->conf->authmode;
-
- if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) ||
- authmode == MBEDTLS_SSL_VERIFY_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate request" ) );
- return( 0 );
- }
-
- /*
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 4 cert type count
- * 5 .. m-1 cert types
- * m .. m+1 sig alg length (TLS 1.2 only)
- * m+1 .. n-1 SignatureAndHashAlgorithms (TLS 1.2 only)
- * n .. n+1 length of all DNs
- * n+2 .. n+3 length of DN 1
- * n+4 .. ... Distinguished Name #1
- * ... .. ... length of DN 2, etc.
- */
- buf = ssl->out_msg;
- p = buf + 4;
-
- /*
- * Supported certificate types
- *
- * ClientCertificateType certificate_types<1..2^8-1>;
- * enum { (255) } ClientCertificateType;
- */
- ct_len = 0;
-
-#if defined(MBEDTLS_RSA_C)
- p[1 + ct_len++] = MBEDTLS_SSL_CERT_TYPE_RSA_SIGN;
-#endif
-#if defined(MBEDTLS_ECDSA_C)
- p[1 + ct_len++] = MBEDTLS_SSL_CERT_TYPE_ECDSA_SIGN;
-#endif
-
- p[0] = (unsigned char) ct_len++;
- p += ct_len;
-
- sa_len = 0;
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- /*
- * Add signature_algorithms for verify (TLS 1.2)
- *
- * SignatureAndHashAlgorithm supported_signature_algorithms<2..2^16-2>;
- *
- * struct {
- * HashAlgorithm hash;
- * SignatureAlgorithm signature;
- * } SignatureAndHashAlgorithm;
- *
- * enum { (255) } HashAlgorithm;
- * enum { (255) } SignatureAlgorithm;
- */
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- const int *cur;
-
- /*
- * Supported signature algorithms
- */
- for( cur = ssl->conf->sig_hashes; *cur != MBEDTLS_MD_NONE; cur++ )
- {
- unsigned char hash = mbedtls_ssl_hash_from_md_alg( *cur );
-
- if( MBEDTLS_SSL_HASH_NONE == hash || mbedtls_ssl_set_calc_verify_md( ssl, hash ) )
- continue;
-
-#if defined(MBEDTLS_RSA_C)
- p[2 + sa_len++] = hash;
- p[2 + sa_len++] = MBEDTLS_SSL_SIG_RSA;
-#endif
-#if defined(MBEDTLS_ECDSA_C)
- p[2 + sa_len++] = hash;
- p[2 + sa_len++] = MBEDTLS_SSL_SIG_ECDSA;
-#endif
- }
-
- p[0] = (unsigned char)( sa_len >> 8 );
- p[1] = (unsigned char)( sa_len );
- sa_len += 2;
- p += sa_len;
- }
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
- /*
- * DistinguishedName certificate_authorities<0..2^16-1>;
- * opaque DistinguishedName<1..2^16-1>;
- */
- p += 2;
-
- total_dn_size = 0;
-
- if( ssl->conf->cert_req_ca_list == MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED )
- {
- /* NOTE: If trusted certificates are provisioned
- * via a CA callback (configured through
- * `mbedtls_ssl_conf_ca_cb()`, then the
- * CertificateRequest is currently left empty. */
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- if( ssl->handshake->sni_ca_chain != NULL )
- crt = ssl->handshake->sni_ca_chain;
- else
-#endif
- crt = ssl->conf->ca_chain;
-
- while( crt != NULL && crt->version != 0 )
- {
- dn_size = crt->subject_raw.len;
-
- if( end < p ||
- (size_t)( end - p ) < dn_size ||
- (size_t)( end - p ) < 2 + dn_size )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "skipping CAs: buffer too short" ) );
- break;
- }
-
- *p++ = (unsigned char)( dn_size >> 8 );
- *p++ = (unsigned char)( dn_size );
- memcpy( p, crt->subject_raw.p, dn_size );
- p += dn_size;
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "requested DN", p - dn_size, dn_size );
-
- total_dn_size += 2 + dn_size;
- crt = crt->next;
- }
- }
-
- ssl->out_msglen = p - buf;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE_REQUEST;
- ssl->out_msg[4 + ct_len + sa_len] = (unsigned char)( total_dn_size >> 8 );
- ssl->out_msg[5 + ct_len + sa_len] = (unsigned char)( total_dn_size );
-
- ret = mbedtls_ssl_write_handshake_msg( ssl );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate request" ) );
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
+#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) && \
+ defined(MBEDTLS_SSL_ASYNC_PRIVATE)
+static int ssl_resume_server_key_exchange( mbedtls_ssl_context *ssl,
+ size_t *signature_len );
+#endif /* defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) &&
+ defined(MBEDTLS_SSL_ASYNC_PRIVATE) */
#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
-static int ssl_get_ecdh_params_from_cert( mbedtls_ssl_context *ssl )
+static int ssl_get_ecdh_params_from_cert( mbedtls_ssl_context *ssl );
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
+ MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
+
+
+/* Prepare the ServerKeyExchange message and send it. For ciphersuites
+ * that do not include a ServerKeyExchange message, do nothing. Either
+ * way, if successful, move on to the next step in the SSL state
+ * machine. */
+static int ssl_write_server_key_exchange( mbedtls_ssl_context *ssl )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ size_t signature_len = 0;
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED)
+ const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+ ssl->handshake->ciphersuite_info;
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED */
- if( ! mbedtls_pk_can_do( mbedtls_ssl_own_key( ssl ), MBEDTLS_PK_ECKEY ) )
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write server key exchange" ) );
+
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED)
+ /* Extract static ECDH parameters and abort if ServerKeyExchange
+ * is not needed. */
+ if( mbedtls_ssl_ciphersuite_no_pfs( ciphersuite_info ) )
{
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server key not ECDH capable" ) );
- return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
+ /* For suites involving ECDH, extract DH parameters
+ * from certificate at this point. */
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED)
+ if( mbedtls_ssl_ciphersuite_uses_ecdh( ciphersuite_info ) )
+ {
+ ssl_get_ecdh_params_from_cert( ssl );
+ }
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED */
+
+ /* Key exchanges not involving ephemeral keys don't use
+ * ServerKeyExchange, so end here. */
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write server key exchange" ) );
+ ssl->state++;
+ return( 0 );
+ }
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) && \
+ defined(MBEDTLS_SSL_ASYNC_PRIVATE)
+ /* If we have already prepared the message and there is an ongoing
+ * signature operation, resume signing. */
+ if( ssl->handshake->async_in_progress != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "resuming signature operation" ) );
+ ret = ssl_resume_server_key_exchange( ssl, &signature_len );
+ }
+ else
+#endif /* defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) &&
+ defined(MBEDTLS_SSL_ASYNC_PRIVATE) */
+ {
+ /* ServerKeyExchange is needed. Prepare the message. */
+ ret = ssl_prepare_server_key_exchange( ssl, &signature_len );
}
- if( ( ret = mbedtls_ecdh_get_params( &ssl->handshake->ecdh_ctx,
- mbedtls_pk_ec( *mbedtls_ssl_own_key( ssl ) ),
- MBEDTLS_ECDH_OURS ) ) != 0 )
+ if( ret != 0 )
{
- MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_get_params" ), ret );
+ /* If we're starting to write a new message, set ssl->out_msglen
+ * to 0. But if we're resuming after an asynchronous message,
+ * out_msglen is the amount of data written so far and mst be
+ * preserved. */
+ if( ret == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS )
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server key exchange (pending)" ) );
+ else
+ ssl->out_msglen = 0;
return( ret );
}
+ /* If there is a signature, write its length.
+ * ssl_prepare_server_key_exchange already wrote the signature
+ * itself at its proper place in the output buffer. */
+#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
+ if( signature_len != 0 )
+ {
+ ssl->out_msg[ssl->out_msglen++] = (unsigned char)( signature_len >> 8 );
+ ssl->out_msg[ssl->out_msglen++] = (unsigned char)( signature_len );
+
+ MBEDTLS_SSL_DEBUG_BUF( 3, "my signature",
+ ssl->out_msg + ssl->out_msglen,
+ signature_len );
+
+ /* Skip over the already-written signature */
+ ssl->out_msglen += signature_len;
+ }
+#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
+
+ /* Add header and send. */
+ ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
+ ssl->out_msg[0] = MBEDTLS_SSL_HS_SERVER_KEY_EXCHANGE;
+
+ ssl->state++;
+
+ if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
+ return( ret );
+ }
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server key exchange" ) );
return( 0 );
}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
- MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) && \
defined(MBEDTLS_SSL_ASYNC_PRIVATE)
@@ -3419,106 +3475,226 @@
return( 0 );
}
-/* Prepare the ServerKeyExchange message and send it. For ciphersuites
- * that do not include a ServerKeyExchange message, do nothing. Either
- * way, if successful, move on to the next step in the SSL state
- * machine. */
-static int ssl_write_server_key_exchange( mbedtls_ssl_context *ssl )
+/*
+ * SERVER HANDSHAKE STATE: Outgoing `CertificateRequest`
+ */
+
+#if !defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
+static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t signature_len = 0;
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED)
const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED */
+ ssl->handshake->ciphersuite_info;
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write server key exchange" ) );
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate request" ) );
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED)
- /* Extract static ECDH parameters and abort if ServerKeyExchange
- * is not needed. */
- if( mbedtls_ssl_ciphersuite_no_pfs( ciphersuite_info ) )
+ if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
{
- /* For suites involving ECDH, extract DH parameters
- * from certificate at this point. */
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED)
- if( mbedtls_ssl_ciphersuite_uses_ecdh( ciphersuite_info ) )
- {
- ssl_get_ecdh_params_from_cert( ssl );
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED */
-
- /* Key exchanges not involving ephemeral keys don't use
- * ServerKeyExchange, so end here. */
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write server key exchange" ) );
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate request" ) );
ssl->state++;
return( 0 );
}
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) && \
- defined(MBEDTLS_SSL_ASYNC_PRIVATE)
- /* If we have already prepared the message and there is an ongoing
- * signature operation, resume signing. */
- if( ssl->handshake->async_in_progress != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "resuming signature operation" ) );
- ret = ssl_resume_server_key_exchange( ssl, &signature_len );
- }
- else
-#endif /* defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) &&
- defined(MBEDTLS_SSL_ASYNC_PRIVATE) */
- {
- /* ServerKeyExchange is needed. Prepare the message. */
- ret = ssl_prepare_server_key_exchange( ssl, &signature_len );
- }
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+}
+#else /* !MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
+static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
+{
+ int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
+ const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
+ ssl->handshake->ciphersuite_info;
+ size_t dn_size, total_dn_size; /* excluding length bytes */
+ size_t ct_len, sa_len; /* including length bytes */
+ unsigned char *buf, *p;
+ const unsigned char * const end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
+ const mbedtls_x509_crt *crt;
+ int authmode;
- if( ret != 0 )
- {
- /* If we're starting to write a new message, set ssl->out_msglen
- * to 0. But if we're resuming after an asynchronous message,
- * out_msglen is the amount of data written so far and mst be
- * preserved. */
- if( ret == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS )
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server key exchange (pending)" ) );
- else
- ssl->out_msglen = 0;
- return( ret );
- }
-
- /* If there is a signature, write its length.
- * ssl_prepare_server_key_exchange already wrote the signature
- * itself at its proper place in the output buffer. */
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
- if( signature_len != 0 )
- {
- ssl->out_msg[ssl->out_msglen++] = (unsigned char)( signature_len >> 8 );
- ssl->out_msg[ssl->out_msglen++] = (unsigned char)( signature_len );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "my signature",
- ssl->out_msg + ssl->out_msglen,
- signature_len );
-
- /* Skip over the already-written signature */
- ssl->out_msglen += signature_len;
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
-
- /* Add header and send. */
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_SERVER_KEY_EXCHANGE;
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate request" ) );
ssl->state++;
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
+#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
+ if( ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET )
+ authmode = ssl->handshake->sni_authmode;
+ else
+#endif
+ authmode = ssl->conf->authmode;
+
+ if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) ||
+ authmode == MBEDTLS_SSL_VERIFY_NONE )
{
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate request" ) );
+ return( 0 );
+ }
+
+ /*
+ * 0 . 0 handshake type
+ * 1 . 3 handshake length
+ * 4 . 4 cert type count
+ * 5 .. m-1 cert types
+ * m .. m+1 sig alg length (TLS 1.2 only)
+ * m+1 .. n-1 SignatureAndHashAlgorithms (TLS 1.2 only)
+ * n .. n+1 length of all DNs
+ * n+2 .. n+3 length of DN 1
+ * n+4 .. ... Distinguished Name #1
+ * ... .. ... length of DN 2, etc.
+ */
+ buf = ssl->out_msg;
+ p = buf + 4;
+
+ /*
+ * Supported certificate types
+ *
+ * ClientCertificateType certificate_types<1..2^8-1>;
+ * enum { (255) } ClientCertificateType;
+ */
+ ct_len = 0;
+
+#if defined(MBEDTLS_RSA_C)
+ p[1 + ct_len++] = MBEDTLS_SSL_CERT_TYPE_RSA_SIGN;
+#endif
+#if defined(MBEDTLS_ECDSA_C)
+ p[1 + ct_len++] = MBEDTLS_SSL_CERT_TYPE_ECDSA_SIGN;
+#endif
+
+ p[0] = (unsigned char) ct_len++;
+ p += ct_len;
+
+ sa_len = 0;
+#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
+ /*
+ * Add signature_algorithms for verify (TLS 1.2)
+ *
+ * SignatureAndHashAlgorithm supported_signature_algorithms<2..2^16-2>;
+ *
+ * struct {
+ * HashAlgorithm hash;
+ * SignatureAlgorithm signature;
+ * } SignatureAndHashAlgorithm;
+ *
+ * enum { (255) } HashAlgorithm;
+ * enum { (255) } SignatureAlgorithm;
+ */
+ if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
+ {
+ const int *cur;
+
+ /*
+ * Supported signature algorithms
+ */
+ for( cur = ssl->conf->sig_hashes; *cur != MBEDTLS_MD_NONE; cur++ )
+ {
+ unsigned char hash = mbedtls_ssl_hash_from_md_alg( *cur );
+
+ if( MBEDTLS_SSL_HASH_NONE == hash || mbedtls_ssl_set_calc_verify_md( ssl, hash ) )
+ continue;
+
+#if defined(MBEDTLS_RSA_C)
+ p[2 + sa_len++] = hash;
+ p[2 + sa_len++] = MBEDTLS_SSL_SIG_RSA;
+#endif
+#if defined(MBEDTLS_ECDSA_C)
+ p[2 + sa_len++] = hash;
+ p[2 + sa_len++] = MBEDTLS_SSL_SIG_ECDSA;
+#endif
+ }
+
+ p[0] = (unsigned char)( sa_len >> 8 );
+ p[1] = (unsigned char)( sa_len );
+ sa_len += 2;
+ p += sa_len;
+ }
+#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
+
+ /*
+ * DistinguishedName certificate_authorities<0..2^16-1>;
+ * opaque DistinguishedName<1..2^16-1>;
+ */
+ p += 2;
+
+ total_dn_size = 0;
+
+ if( ssl->conf->cert_req_ca_list == MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED )
+ {
+ /* NOTE: If trusted certificates are provisioned
+ * via a CA callback (configured through
+ * `mbedtls_ssl_conf_ca_cb()`, then the
+ * CertificateRequest is currently left empty. */
+
+#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
+ if( ssl->handshake->sni_ca_chain != NULL )
+ crt = ssl->handshake->sni_ca_chain;
+ else
+#endif
+ crt = ssl->conf->ca_chain;
+
+ while( crt != NULL && crt->version != 0 )
+ {
+ dn_size = crt->subject_raw.len;
+
+ if( end < p ||
+ (size_t)( end - p ) < dn_size ||
+ (size_t)( end - p ) < 2 + dn_size )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "skipping CAs: buffer too short" ) );
+ break;
+ }
+
+ *p++ = (unsigned char)( dn_size >> 8 );
+ *p++ = (unsigned char)( dn_size );
+ memcpy( p, crt->subject_raw.p, dn_size );
+ p += dn_size;
+
+ MBEDTLS_SSL_DEBUG_BUF( 3, "requested DN", p - dn_size, dn_size );
+
+ total_dn_size += 2 + dn_size;
+ crt = crt->next;
+ }
+ }
+
+ ssl->out_msglen = p - buf;
+ ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
+ ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE_REQUEST;
+ ssl->out_msg[4 + ct_len + sa_len] = (unsigned char)( total_dn_size >> 8 );
+ ssl->out_msg[5 + ct_len + sa_len] = (unsigned char)( total_dn_size );
+
+ ret = mbedtls_ssl_write_handshake_msg( ssl );
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate request" ) );
+
+ return( ret );
+}
+#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
+static int ssl_get_ecdh_params_from_cert( mbedtls_ssl_context *ssl )
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+
+ if( ! mbedtls_pk_can_do( mbedtls_ssl_own_key( ssl ), MBEDTLS_PK_ECKEY ) )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "server key not ECDH capable" ) );
+ return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
+ }
+
+ if( ( ret = mbedtls_ecdh_get_params( &ssl->handshake->ecdh_ctx,
+ mbedtls_pk_ec( *mbedtls_ssl_own_key( ssl ) ),
+ MBEDTLS_ECDH_OURS ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_get_params" ), ret );
return( ret );
}
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server key exchange" ) );
return( 0 );
}
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
+ MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
+
+/*
+ * SERVER HANDSHAKE STATE: Outgoing `ServerHelloDone`
+ */
static int ssl_write_server_hello_done( mbedtls_ssl_context *ssl )
{
@@ -3557,6 +3733,360 @@
return( 0 );
}
+/*
+ * SERVER HANDSHAKE STATE: Incoming `Certificate`
+ *
+ * This is shared with the client-side and implemented in ssl_12_gen.c.
+ */
+
+/*
+ * SERVER HANDSHAKE STATE: Incoming `ClientKeyExchange`
+ */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
+static int ssl_parse_client_dh_public( mbedtls_ssl_context *ssl,
+ unsigned char **p,
+ const unsigned char *end );
+#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
+
+#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
+static int ssl_resume_decrypt_pms( mbedtls_ssl_context *ssl,
+ unsigned char *peer_pms,
+ size_t *peer_pmslen,
+ size_t peer_pmssize );
+#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
+
+static int ssl_decrypt_encrypted_pms( mbedtls_ssl_context *ssl,
+ const unsigned char *p,
+ const unsigned char *end,
+ unsigned char *peer_pms,
+ size_t *peer_pmslen,
+ size_t peer_pmssize );
+
+static int ssl_parse_encrypted_pms( mbedtls_ssl_context *ssl,
+ const unsigned char *p,
+ const unsigned char *end,
+ size_t pms_offset );
+#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
+
+#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
+static int ssl_parse_client_psk_identity( mbedtls_ssl_context *ssl,
+ unsigned char **p,
+ const unsigned char *end );
+#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
+
+
+static int ssl_parse_client_key_exchange( mbedtls_ssl_context *ssl )
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
+ unsigned char *p, *end;
+
+ ciphersuite_info = ssl->handshake->ciphersuite_info;
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse client key exchange" ) );
+
+#if defined(MBEDTLS_SSL_ASYNC_PRIVATE) && \
+ ( defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED) )
+ if( ( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK ||
+ ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA ) &&
+ ( ssl->handshake->async_in_progress != 0 ) )
+ {
+ /* We've already read a record and there is an asynchronous
+ * operation in progress to decrypt it. So skip reading the
+ * record. */
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "will resume decryption of previously-read record" ) );
+ }
+ else
+#endif
+ if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
+ return( ret );
+ }
+
+ p = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
+ end = ssl->in_msg + ssl->in_hslen;
+
+ if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
+ }
+
+ if( ssl->in_msg[0] != MBEDTLS_SSL_HS_CLIENT_KEY_EXCHANGE )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
+ }
+
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)
+ if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA )
+ {
+ if( ( ret = ssl_parse_client_dh_public( ssl, &p, end ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_dh_public" ), ret );
+ return( ret );
+ }
+
+ if( p != end )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
+ }
+
+ if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
+ ssl->handshake->premaster,
+ MBEDTLS_PREMASTER_SIZE,
+ &ssl->handshake->pmslen,
+ ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS );
+ }
+
+ MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
+ }
+ else
+#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED */
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
+ defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
+ if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
+ ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA ||
+ ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_RSA ||
+ ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA )
+ {
+ if( ( ret = mbedtls_ecdh_read_public( &ssl->handshake->ecdh_ctx,
+ p, end - p) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_read_public", ret );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP );
+ }
+
+ MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
+ MBEDTLS_DEBUG_ECDH_QP );
+
+ if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx,
+ &ssl->handshake->pmslen,
+ ssl->handshake->premaster,
+ MBEDTLS_MPI_MAX_SIZE,
+ ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS );
+ }
+
+ MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
+ MBEDTLS_DEBUG_ECDH_Z );
+ }
+ else
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
+ MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
+#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
+ if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK )
+ {
+ if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
+ return( ret );
+ }
+
+ if( p != end )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
+ }
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+ /* For opaque PSKs, we perform the PSK-to-MS derivation atomatically
+ * and skip the intermediate PMS. */
+ if( ssl_use_opaque_psk( ssl ) == 1 )
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "skip PMS generation for opaque PSK" ) );
+ else
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+ if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
+ ciphersuite_info->key_exchange ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
+ return( ret );
+ }
+ }
+ else
+#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
+#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
+ if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
+ {
+#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
+ if ( ssl->handshake->async_in_progress != 0 )
+ {
+ /* There is an asynchronous operation in progress to
+ * decrypt the encrypted premaster secret, so skip
+ * directly to resuming this operation. */
+ MBEDTLS_SSL_DEBUG_MSG( 3, ( "PSK identity already parsed" ) );
+ /* Update p to skip the PSK identity. ssl_parse_encrypted_pms
+ * won't actually use it, but maintain p anyway for robustness. */
+ p += ssl->conf->psk_identity_len + 2;
+ }
+ else
+#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
+ if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
+ return( ret );
+ }
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+ /* Opaque PSKs are currently only supported for PSK-only. */
+ if( ssl_use_opaque_psk( ssl ) == 1 )
+ return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
+#endif
+
+ if( ( ret = ssl_parse_encrypted_pms( ssl, p, end, 2 ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_encrypted_pms" ), ret );
+ return( ret );
+ }
+
+ if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
+ ciphersuite_info->key_exchange ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
+ return( ret );
+ }
+ }
+ else
+#endif /* MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
+#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
+ if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
+ {
+ if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
+ return( ret );
+ }
+ if( ( ret = ssl_parse_client_dh_public( ssl, &p, end ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_dh_public" ), ret );
+ return( ret );
+ }
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+ /* Opaque PSKs are currently only supported for PSK-only. */
+ if( ssl_use_opaque_psk( ssl ) == 1 )
+ return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
+#endif
+
+ if( p != end )
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange" ) );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
+ }
+
+ if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
+ ciphersuite_info->key_exchange ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
+ return( ret );
+ }
+ }
+ else
+#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
+ if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
+ {
+ if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
+ return( ret );
+ }
+
+ if( ( ret = mbedtls_ecdh_read_public( &ssl->handshake->ecdh_ctx,
+ p, end - p ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_read_public", ret );
+ return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP );
+ }
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+ /* Opaque PSKs are currently only supported for PSK-only. */
+ if( ssl_use_opaque_psk( ssl ) == 1 )
+ return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
+#endif
+
+ MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
+ MBEDTLS_DEBUG_ECDH_QP );
+
+ if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
+ ciphersuite_info->key_exchange ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
+ return( ret );
+ }
+ }
+ else
+#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
+#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
+ if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA )
+ {
+ if( ( ret = ssl_parse_encrypted_pms( ssl, p, end, 0 ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_parse_encrypted_pms_secret" ), ret );
+ return( ret );
+ }
+ }
+ else
+#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED */
+#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
+ if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
+ {
+ ret = mbedtls_ecjpake_read_round_two( &ssl->handshake->ecjpake_ctx,
+ p, end - p );
+ if( ret != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_two", ret );
+ return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
+ }
+
+ ret = mbedtls_ecjpake_derive_secret( &ssl->handshake->ecjpake_ctx,
+ ssl->handshake->premaster, 32, &ssl->handshake->pmslen,
+ ssl->conf->f_rng, ssl->conf->p_rng );
+ if( ret != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_derive_secret", ret );
+ return( ret );
+ }
+ }
+ else
+#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
+ {
+ MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
+ return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+ }
+
+ if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
+ {
+ MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
+ return( ret );
+ }
+
+ ssl->state++;
+
+ MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse client key exchange" ) );
+
+ return( 0 );
+}
+
#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
static int ssl_parse_client_dh_public( mbedtls_ssl_context *ssl, unsigned char **p,
@@ -3867,310 +4397,9 @@
}
#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-static int ssl_parse_client_key_exchange( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
- unsigned char *p, *end;
-
- ciphersuite_info = ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse client key exchange" ) );
-
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE) && \
- ( defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED) )
- if( ( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA ) &&
- ( ssl->handshake->async_in_progress != 0 ) )
- {
- /* We've already read a record and there is an asynchronous
- * operation in progress to decrypt it. So skip reading the
- * record. */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "will resume decryption of previously-read record" ) );
- }
- else
-#endif
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- return( ret );
- }
-
- p = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
- end = ssl->in_msg + ssl->in_hslen;
-
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- if( ssl->in_msg[0] != MBEDTLS_SSL_HS_CLIENT_KEY_EXCHANGE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA )
- {
- if( ( ret = ssl_parse_client_dh_public( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_dh_public" ), ret );
- return( ret );
- }
-
- if( p != end )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
- ssl->handshake->premaster,
- MBEDTLS_PREMASTER_SIZE,
- &ssl->handshake->pmslen,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS );
- }
-
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA )
- {
- if( ( ret = mbedtls_ecdh_read_public( &ssl->handshake->ecdh_ctx,
- p, end - p) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_read_public", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP );
- }
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_QP );
-
- if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx,
- &ssl->handshake->pmslen,
- ssl->handshake->premaster,
- MBEDTLS_MPI_MAX_SIZE,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS );
- }
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_Z );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK )
- {
- if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
- return( ret );
- }
-
- if( p != end )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* For opaque PSKs, we perform the PSK-to-MS derivation atomatically
- * and skip the intermediate PMS. */
- if( ssl_use_opaque_psk( ssl ) == 1 )
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "skip PMS generation for opaque PSK" ) );
- else
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
- if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
- {
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
- if ( ssl->handshake->async_in_progress != 0 )
- {
- /* There is an asynchronous operation in progress to
- * decrypt the encrypted premaster secret, so skip
- * directly to resuming this operation. */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "PSK identity already parsed" ) );
- /* Update p to skip the PSK identity. ssl_parse_encrypted_pms
- * won't actually use it, but maintain p anyway for robustness. */
- p += ssl->conf->psk_identity_len + 2;
- }
- else
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
- if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Opaque PSKs are currently only supported for PSK-only. */
- if( ssl_use_opaque_psk( ssl ) == 1 )
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-#endif
-
- if( ( ret = ssl_parse_encrypted_pms( ssl, p, end, 2 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_encrypted_pms" ), ret );
- return( ret );
- }
-
- if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
- {
- if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
- return( ret );
- }
- if( ( ret = ssl_parse_client_dh_public( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_dh_public" ), ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Opaque PSKs are currently only supported for PSK-only. */
- if( ssl_use_opaque_psk( ssl ) == 1 )
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-#endif
-
- if( p != end )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
- {
- if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
- return( ret );
- }
-
- if( ( ret = mbedtls_ecdh_read_public( &ssl->handshake->ecdh_ctx,
- p, end - p ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_read_public", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP );
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Opaque PSKs are currently only supported for PSK-only. */
- if( ssl_use_opaque_psk( ssl ) == 1 )
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-#endif
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_QP );
-
- if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA )
- {
- if( ( ret = ssl_parse_encrypted_pms( ssl, p, end, 0 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_parse_encrypted_pms_secret" ), ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
- {
- ret = mbedtls_ecjpake_read_round_two( &ssl->handshake->ecjpake_ctx,
- p, end - p );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_two", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- ret = mbedtls_ecjpake_derive_secret( &ssl->handshake->ecjpake_ctx,
- ssl->handshake->premaster, 32, &ssl->handshake->pmslen,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_derive_secret", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
- return( ret );
- }
-
- ssl->state++;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse client key exchange" ) );
-
- return( 0 );
-}
+/*
+ * SERVER HANDSHAKE STATE: Incoming `CertificateVerify`
+ */
#if !defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl )
@@ -4383,6 +4612,16 @@
}
#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
+/*
+ * SERVER HANDSHAKE STATE: Incoming `Finished`
+ *
+ * This is shared with the client-side and implemented in ssl_12_gen.c.
+ */
+
+/*
+ * SERVER HANDSHAKE STATE: Outgoing `NewSessionTicket`
+ */
+
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
static int ssl_write_new_session_ticket( mbedtls_ssl_context *ssl )
{
@@ -4445,133 +4684,9 @@
#endif /* MBEDTLS_SSL_SESSION_TICKETS */
/*
- * SSL handshake -- server side -- single step
+ * SERVER HANDSHAKE STATE: Outgoing `Finished`
+ *
+ * This is shared with the client-side and implemented in ssl_12_gen.c.
*/
-int mbedtls_ssl_handshake_server_step( mbedtls_ssl_context *ssl )
-{
- int ret = 0;
- if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "server state: %d", ssl->state ) );
-
- if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
- return( ret );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
- {
- if( ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
- return( ret );
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- switch( ssl->state )
- {
- case MBEDTLS_SSL_HELLO_REQUEST:
- ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
- break;
-
- /*
- * <== ClientHello
- */
- case MBEDTLS_SSL_CLIENT_HELLO:
- ret = ssl_parse_client_hello( ssl );
- break;
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- case MBEDTLS_SSL_SERVER_HELLO_VERIFY_REQUEST_SENT:
- return( MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED );
-#endif
-
- /*
- * ==> ServerHello
- * Certificate
- * ( ServerKeyExchange )
- * ( CertificateRequest )
- * ServerHelloDone
- */
- case MBEDTLS_SSL_SERVER_HELLO:
- ret = ssl_write_server_hello( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_CERTIFICATE:
- ret = mbedtls_ssl_write_certificate( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_KEY_EXCHANGE:
- ret = ssl_write_server_key_exchange( ssl );
- break;
-
- case MBEDTLS_SSL_CERTIFICATE_REQUEST:
- ret = ssl_write_certificate_request( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_HELLO_DONE:
- ret = ssl_write_server_hello_done( ssl );
- break;
-
- /*
- * <== ( Certificate/Alert )
- * ClientKeyExchange
- * ( CertificateVerify )
- * ChangeCipherSpec
- * Finished
- */
- case MBEDTLS_SSL_CLIENT_CERTIFICATE:
- ret = mbedtls_ssl_parse_certificate( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_KEY_EXCHANGE:
- ret = ssl_parse_client_key_exchange( ssl );
- break;
-
- case MBEDTLS_SSL_CERTIFICATE_VERIFY:
- ret = ssl_parse_certificate_verify( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC:
- ret = mbedtls_ssl_parse_change_cipher_spec( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_FINISHED:
- ret = mbedtls_ssl_parse_finished( ssl );
- break;
-
- /*
- * ==> ( NewSessionTicket )
- * ChangeCipherSpec
- * Finished
- */
- case MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC:
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- if( ssl->handshake->new_session_ticket != 0 )
- ret = ssl_write_new_session_ticket( ssl );
- else
-#endif
- ret = mbedtls_ssl_write_change_cipher_spec( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_FINISHED:
- ret = mbedtls_ssl_write_finished( ssl );
- break;
-
- case MBEDTLS_SSL_FLUSH_BUFFERS:
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
- ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
- break;
-
- case MBEDTLS_SSL_HANDSHAKE_WRAPUP:
- mbedtls_ssl_handshake_wrapup( ssl );
- break;
-
- default:
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- return( ret );
-}
#endif /* MBEDTLS_SSL_SRV_C */
diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 0f6a26b..d3b3439 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -56,3988 +56,4 @@
#include "mbedtls/platform_util.h"
#endif
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-static int ssl_conf_has_static_psk( mbedtls_ssl_config const *conf )
-{
- if( conf->psk_identity == NULL ||
- conf->psk_identity_len == 0 )
- {
- return( 0 );
- }
-
- if( conf->psk != NULL && conf->psk_len != 0 )
- return( 1 );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- if( conf->psk_opaque != 0 )
- return( 1 );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-static int ssl_conf_has_static_raw_psk( mbedtls_ssl_config const *conf )
-{
- if( conf->psk_identity == NULL ||
- conf->psk_identity_len == 0 )
- {
- return( 0 );
- }
-
- if( conf->psk != NULL && conf->psk_len != 0 )
- return( 1 );
-
- return( 0 );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
-static void ssl_write_hostname_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- size_t hostname_len;
-
- *olen = 0;
-
- if( ssl->hostname == NULL )
- return;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding server name extension: %s",
- ssl->hostname ) );
-
- hostname_len = strlen( ssl->hostname );
-
- if( end < p || (size_t)( end - p ) < hostname_len + 9 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- /*
- * Sect. 3, RFC 6066 (TLS Extensions Definitions)
- *
- * In order to provide any of the server names, clients MAY include an
- * extension of type "server_name" in the (extended) client hello. The
- * "extension_data" field of this extension SHALL contain
- * "ServerNameList" where:
- *
- * struct {
- * NameType name_type;
- * select (name_type) {
- * case host_name: HostName;
- * } name;
- * } ServerName;
- *
- * enum {
- * host_name(0), (255)
- * } NameType;
- *
- * opaque HostName<1..2^16-1>;
- *
- * struct {
- * ServerName server_name_list<1..2^16-1>
- * } ServerNameList;
- *
- */
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SERVERNAME >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SERVERNAME ) & 0xFF );
-
- *p++ = (unsigned char)( ( (hostname_len + 5) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( (hostname_len + 5) ) & 0xFF );
-
- *p++ = (unsigned char)( ( (hostname_len + 3) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( (hostname_len + 3) ) & 0xFF );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SERVERNAME_HOSTNAME ) & 0xFF );
- *p++ = (unsigned char)( ( hostname_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( hostname_len ) & 0xFF );
-
- memcpy( p, ssl->hostname, hostname_len );
-
- *olen = hostname_len + 9;
-}
-#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
-static void ssl_write_renegotiation_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
-
- *olen = 0;
-
- /* We're always including an TLS_EMPTY_RENEGOTIATION_INFO_SCSV in the
- * initial ClientHello, in which case also adding the renegotiation
- * info extension is NOT RECOMMENDED as per RFC 5746 Section 3.4. */
- if( ssl->renego_status != MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
- return;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding renegotiation extension" ) );
-
- if( end < p || (size_t)( end - p ) < 5 + ssl->verify_data_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- /*
- * Secure renegotiation
- */
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = ( ssl->verify_data_len + 1 ) & 0xFF;
- *p++ = ssl->verify_data_len & 0xFF;
-
- memcpy( p, ssl->own_verify_data, ssl->verify_data_len );
-
- *olen = 5 + ssl->verify_data_len;
-}
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
-/*
- * Only if we handle at least one key exchange that needs signatures.
- */
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-static void ssl_write_signature_algorithms_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- size_t sig_alg_len = 0;
- const int *md;
-#if defined(MBEDTLS_RSA_C) || defined(MBEDTLS_ECDSA_C)
- unsigned char *sig_alg_list = buf + 6;
-#endif
-
- *olen = 0;
-
- if( ssl->conf->max_minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
- return;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding signature_algorithms extension" ) );
-
- for( md = ssl->conf->sig_hashes; *md != MBEDTLS_MD_NONE; md++ )
- {
-#if defined(MBEDTLS_ECDSA_C)
- sig_alg_len += 2;
-#endif
-#if defined(MBEDTLS_RSA_C)
- sig_alg_len += 2;
-#endif
- }
-
- if( end < p || (size_t)( end - p ) < sig_alg_len + 6 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- /*
- * Prepare signature_algorithms extension (TLS 1.2)
- */
- sig_alg_len = 0;
-
- for( md = ssl->conf->sig_hashes; *md != MBEDTLS_MD_NONE; md++ )
- {
-#if defined(MBEDTLS_ECDSA_C)
- sig_alg_list[sig_alg_len++] = mbedtls_ssl_hash_from_md_alg( *md );
- sig_alg_list[sig_alg_len++] = MBEDTLS_SSL_SIG_ECDSA;
-#endif
-#if defined(MBEDTLS_RSA_C)
- sig_alg_list[sig_alg_len++] = mbedtls_ssl_hash_from_md_alg( *md );
- sig_alg_list[sig_alg_len++] = MBEDTLS_SSL_SIG_RSA;
-#endif
- }
-
- /*
- * enum {
- * none(0), md5(1), sha1(2), sha224(3), sha256(4), sha384(5),
- * sha512(6), (255)
- * } HashAlgorithm;
- *
- * enum { anonymous(0), rsa(1), dsa(2), ecdsa(3), (255) }
- * SignatureAlgorithm;
- *
- * struct {
- * HashAlgorithm hash;
- * SignatureAlgorithm signature;
- * } SignatureAndHashAlgorithm;
- *
- * SignatureAndHashAlgorithm
- * supported_signature_algorithms<2..2^16-2>;
- */
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SIG_ALG >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SIG_ALG ) & 0xFF );
-
- *p++ = (unsigned char)( ( ( sig_alg_len + 2 ) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ( sig_alg_len + 2 ) ) & 0xFF );
-
- *p++ = (unsigned char)( ( sig_alg_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( sig_alg_len ) & 0xFF );
-
- *olen = 6 + sig_alg_len;
-}
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
- MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static void ssl_write_supported_elliptic_curves_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- unsigned char *elliptic_curve_list = p + 6;
- size_t elliptic_curve_len = 0;
- const mbedtls_ecp_curve_info *info;
-#if defined(MBEDTLS_ECP_C)
- const mbedtls_ecp_group_id *grp_id;
-#else
- ((void) ssl);
-#endif
-
- *olen = 0;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding supported_elliptic_curves extension" ) );
-
-#if defined(MBEDTLS_ECP_C)
- for( grp_id = ssl->conf->curve_list; *grp_id != MBEDTLS_ECP_DP_NONE; grp_id++ )
-#else
- for( info = mbedtls_ecp_curve_list(); info->grp_id != MBEDTLS_ECP_DP_NONE; info++ )
-#endif
- {
-#if defined(MBEDTLS_ECP_C)
- info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
-#endif
- if( info == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid curve in ssl configuration" ) );
- return;
- }
-
- elliptic_curve_len += 2;
- }
-
- if( end < p || (size_t)( end - p ) < 6 + elliptic_curve_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- elliptic_curve_len = 0;
-
-#if defined(MBEDTLS_ECP_C)
- for( grp_id = ssl->conf->curve_list; *grp_id != MBEDTLS_ECP_DP_NONE; grp_id++ )
-#else
- for( info = mbedtls_ecp_curve_list(); info->grp_id != MBEDTLS_ECP_DP_NONE; info++ )
-#endif
- {
-#if defined(MBEDTLS_ECP_C)
- info = mbedtls_ecp_curve_info_from_grp_id( *grp_id );
-#endif
- elliptic_curve_list[elliptic_curve_len++] = info->tls_id >> 8;
- elliptic_curve_list[elliptic_curve_len++] = info->tls_id & 0xFF;
- }
-
- if( elliptic_curve_len == 0 )
- return;
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_ELLIPTIC_CURVES >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_ELLIPTIC_CURVES ) & 0xFF );
-
- *p++ = (unsigned char)( ( ( elliptic_curve_len + 2 ) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ( elliptic_curve_len + 2 ) ) & 0xFF );
-
- *p++ = (unsigned char)( ( ( elliptic_curve_len ) >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ( elliptic_curve_len ) ) & 0xFF );
-
- *olen = 6 + elliptic_curve_len;
-}
-
-static void ssl_write_supported_point_formats_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
-
- *olen = 0;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding supported_point_formats extension" ) );
-
- if( end < p || (size_t)( end - p ) < 6 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 2;
-
- *p++ = 1;
- *p++ = MBEDTLS_ECP_PF_UNCOMPRESSED;
-
- *olen = 6;
-}
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
- MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static void ssl_write_ecjpake_kkpp_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- size_t kkpp_len;
-
- *olen = 0;
-
- /* Skip costly extension if we can't use EC J-PAKE anyway */
- if( mbedtls_ecjpake_check( &ssl->handshake->ecjpake_ctx ) != 0 )
- return;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding ecjpake_kkpp extension" ) );
-
- if( end - p < 4 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP ) & 0xFF );
-
- /*
- * We may need to send ClientHello multiple times for Hello verification.
- * We don't want to compute fresh values every time (both for performance
- * and consistency reasons), so cache the extension content.
- */
- if( ssl->handshake->ecjpake_cache == NULL ||
- ssl->handshake->ecjpake_cache_len == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "generating new ecjpake parameters" ) );
-
- ret = mbedtls_ecjpake_write_round_one( &ssl->handshake->ecjpake_ctx,
- p + 2, end - p - 2, &kkpp_len,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1 , "mbedtls_ecjpake_write_round_one", ret );
- return;
- }
-
- ssl->handshake->ecjpake_cache = mbedtls_calloc( 1, kkpp_len );
- if( ssl->handshake->ecjpake_cache == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "allocation failed" ) );
- return;
- }
-
- memcpy( ssl->handshake->ecjpake_cache, p + 2, kkpp_len );
- ssl->handshake->ecjpake_cache_len = kkpp_len;
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "re-using cached ecjpake parameters" ) );
-
- kkpp_len = ssl->handshake->ecjpake_cache_len;
-
- if( (size_t)( end - p - 2 ) < kkpp_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- memcpy( p + 2, ssl->handshake->ecjpake_cache, kkpp_len );
- }
-
- *p++ = (unsigned char)( ( kkpp_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( kkpp_len ) & 0xFF );
-
- *olen = kkpp_len + 4;
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-static void ssl_write_cid_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- size_t ext_len;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
-
- /*
- * Quoting draft-ietf-tls-dtls-connection-id-05
- * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05
- *
- * struct {
- * opaque cid<0..2^8-1>;
- * } ConnectionId;
- */
-
- *olen = 0;
- if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ||
- ssl->negotiate_cid == MBEDTLS_SSL_CID_DISABLED )
- {
- return;
- }
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding CID extension" ) );
-
- /* ssl->own_cid_len is at most MBEDTLS_SSL_CID_IN_LEN_MAX
- * which is at most 255, so the increment cannot overflow. */
- if( end < p || (size_t)( end - p ) < (unsigned)( ssl->own_cid_len + 5 ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- /* Add extension ID + size */
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_CID >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_CID ) & 0xFF );
- ext_len = (size_t) ssl->own_cid_len + 1;
- *p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ext_len ) & 0xFF );
-
- *p++ = (uint8_t) ssl->own_cid_len;
- memcpy( p, ssl->own_cid, ssl->own_cid_len );
-
- *olen = ssl->own_cid_len + 5;
-}
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-static void ssl_write_max_fragment_length_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
-
- *olen = 0;
-
- if( ssl->conf->mfl_code == MBEDTLS_SSL_MAX_FRAG_LEN_NONE ) {
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding max_fragment_length extension" ) );
-
- if( end < p || (size_t)( end - p ) < 5 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 1;
-
- *p++ = ssl->conf->mfl_code;
-
- *olen = 5;
-}
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-static void ssl_write_truncated_hmac_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
-
- *olen = 0;
-
- if( ssl->conf->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED )
- {
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding truncated_hmac extension" ) );
-
- if( end < p || (size_t)( end - p ) < 4 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-static void ssl_write_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
-
- *olen = 0;
-
- if( ssl->conf->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED ||
- ssl->conf->max_minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding encrypt_then_mac "
- "extension" ) );
-
- if( end < p || (size_t)( end - p ) < 4 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
-static void ssl_write_extended_ms_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
-
- *olen = 0;
-
- if( ssl->conf->extended_ms == MBEDTLS_SSL_EXTENDED_MS_DISABLED ||
- ssl->conf->max_minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding extended_master_secret "
- "extension" ) );
-
- if( end < p || (size_t)( end - p ) < 4 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-static void ssl_write_session_ticket_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- size_t tlen = ssl->session_negotiate->ticket_len;
-
- *olen = 0;
-
- if( ssl->conf->session_tickets == MBEDTLS_SSL_SESSION_TICKETS_DISABLED )
- {
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding session ticket extension" ) );
-
- if( end < p || (size_t)( end - p ) < 4 + tlen )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET ) & 0xFF );
-
- *p++ = (unsigned char)( ( tlen >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( tlen ) & 0xFF );
-
- *olen = 4;
-
- if( ssl->session_negotiate->ticket == NULL || tlen == 0 )
- {
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "sending session ticket of length %d", tlen ) );
-
- memcpy( p, ssl->session_negotiate->ticket, tlen );
-
- *olen += tlen;
-}
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-#if defined(MBEDTLS_SSL_ALPN)
-static void ssl_write_alpn_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- size_t alpnlen = 0;
- const char **cur;
-
- *olen = 0;
-
- if( ssl->conf->alpn_list == NULL )
- {
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, adding alpn extension" ) );
-
- for( cur = ssl->conf->alpn_list; *cur != NULL; cur++ )
- alpnlen += (unsigned char)( strlen( *cur ) & 0xFF ) + 1;
-
- if( end < p || (size_t)( end - p ) < 6 + alpnlen )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN ) & 0xFF );
-
- /*
- * opaque ProtocolName<1..2^8-1>;
- *
- * struct {
- * ProtocolName protocol_name_list<2..2^16-1>
- * } ProtocolNameList;
- */
-
- /* Skip writing extension and list length for now */
- p += 4;
-
- for( cur = ssl->conf->alpn_list; *cur != NULL; cur++ )
- {
- *p = (unsigned char)( strlen( *cur ) & 0xFF );
- memcpy( p + 1, *cur, *p );
- p += 1 + *p;
- }
-
- *olen = p - buf;
-
- /* List length = olen - 2 (ext_type) - 2 (ext_len) - 2 (list_len) */
- buf[4] = (unsigned char)( ( ( *olen - 6 ) >> 8 ) & 0xFF );
- buf[5] = (unsigned char)( ( ( *olen - 6 ) ) & 0xFF );
-
- /* Extension length = olen - 2 (ext_type) - 2 (ext_len) */
- buf[2] = (unsigned char)( ( ( *olen - 4 ) >> 8 ) & 0xFF );
- buf[3] = (unsigned char)( ( ( *olen - 4 ) ) & 0xFF );
-}
-#endif /* MBEDTLS_SSL_ALPN */
-
-/*
- * Generate random bytes for ClientHello
- */
-static int ssl_generate_random( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char *p = ssl->handshake->randbytes;
-#if defined(MBEDTLS_HAVE_TIME)
- mbedtls_time_t t;
-#endif
-
- /*
- * When responding to a verify request, MUST reuse random (RFC 6347 4.2.1)
- */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ssl->handshake->verify_cookie != NULL )
- {
- return( 0 );
- }
-#endif
-
-#if defined(MBEDTLS_HAVE_TIME)
- t = mbedtls_time( NULL );
- *p++ = (unsigned char)( t >> 24 );
- *p++ = (unsigned char)( t >> 16 );
- *p++ = (unsigned char)( t >> 8 );
- *p++ = (unsigned char)( t );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, current time: %lu", t ) );
-#else
- if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 4 ) ) != 0 )
- return( ret );
-
- p += 4;
-#endif /* MBEDTLS_HAVE_TIME */
-
- if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 28 ) ) != 0 )
- return( ret );
-
- return( 0 );
-}
-
-/**
- * \brief Validate cipher suite against config in SSL context.
- *
- * \param suite_info cipher suite to validate
- * \param ssl SSL context
- * \param min_minor_ver Minimal minor version to accept a cipher suite
- * \param max_minor_ver Maximal minor version to accept a cipher suite
- *
- * \return 0 if valid, else 1
- */
-static int ssl_validate_ciphersuite( const mbedtls_ssl_ciphersuite_t * suite_info,
- const mbedtls_ssl_context * ssl,
- int min_minor_ver, int max_minor_ver )
-{
- (void) ssl;
- if( suite_info == NULL )
- return( 1 );
-
- if( suite_info->min_minor_ver > max_minor_ver ||
- suite_info->max_minor_ver < min_minor_ver )
- return( 1 );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ( suite_info->flags & MBEDTLS_CIPHERSUITE_NODTLS ) )
- return( 1 );
-#endif
-
-#if defined(MBEDTLS_ARC4_C)
- if( ssl->conf->arc4_disabled == MBEDTLS_SSL_ARC4_DISABLED &&
- suite_info->cipher == MBEDTLS_CIPHER_ARC4_128 )
- return( 1 );
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( suite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE &&
- mbedtls_ecjpake_check( &ssl->handshake->ecjpake_ctx ) != 0 )
- return( 1 );
-#endif
-
- /* Don't suggest PSK-based ciphersuite if no PSK is available. */
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
- if( mbedtls_ssl_ciphersuite_uses_psk( suite_info ) &&
- ssl_conf_has_static_psk( ssl->conf ) == 0 )
- {
- return( 1 );
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
- return( 0 );
-}
-
-static int ssl_write_client_hello( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t i, n, olen, ext_len = 0;
- unsigned char *buf;
- unsigned char *p, *q;
- unsigned char offer_compress;
- const int *ciphersuites;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- int uses_ec = 0;
-#endif
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write client hello" ) );
-
- if( ssl->conf->f_rng == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "no RNG provided") );
- return( MBEDTLS_ERR_SSL_NO_RNG );
- }
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE )
-#endif
- {
- ssl->major_ver = ssl->conf->min_major_ver;
- ssl->minor_ver = ssl->conf->min_minor_ver;
- }
-
- if( ssl->conf->max_major_ver == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "configured max major version is invalid, "
- "consider using mbedtls_ssl_config_defaults()" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- /*
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 5 highest version supported
- * 6 . 9 current UNIX time
- * 10 . 37 random bytes
- */
- buf = ssl->out_msg;
- p = buf + 4;
-
- mbedtls_ssl_write_version( ssl->conf->max_major_ver, ssl->conf->max_minor_ver,
- ssl->conf->transport, p );
- p += 2;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, max version: [%d:%d]",
- buf[4], buf[5] ) );
-
- if( ( ret = ssl_generate_random( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "ssl_generate_random", ret );
- return( ret );
- }
-
- memcpy( p, ssl->handshake->randbytes, 32 );
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, random bytes", p, 32 );
- p += 32;
-
- /*
- * 38 . 38 session id length
- * 39 . 39+n session id
- * 39+n . 39+n DTLS only: cookie length (1 byte)
- * 40+n . .. DTSL only: cookie
- * .. . .. ciphersuitelist length (2 bytes)
- * .. . .. ciphersuitelist
- * .. . .. compression methods length (1 byte)
- * .. . .. compression methods
- * .. . .. extensions length (2 bytes)
- * .. . .. extensions
- */
- n = ssl->session_negotiate->id_len;
-
- if( n < 16 || n > 32 ||
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE ||
-#endif
- ssl->handshake->resume == 0 )
- {
- n = 0;
- }
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- /*
- * RFC 5077 section 3.4: "When presenting a ticket, the client MAY
- * generate and include a Session ID in the TLS ClientHello."
- */
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE )
-#endif
- {
- if( ssl->session_negotiate->ticket != NULL &&
- ssl->session_negotiate->ticket_len != 0 )
- {
- ret = ssl->conf->f_rng( ssl->conf->p_rng, ssl->session_negotiate->id, 32 );
-
- if( ret != 0 )
- return( ret );
-
- ssl->session_negotiate->id_len = n = 32;
- }
- }
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
- *p++ = (unsigned char) n;
-
- for( i = 0; i < n; i++ )
- *p++ = ssl->session_negotiate->id[i];
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, session id len.: %d", n ) );
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, session id", buf + 39, n );
-
- /*
- * DTLS cookie
- */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- {
- if( ssl->handshake->verify_cookie == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "no verify cookie to send" ) );
- *p++ = 0;
- }
- else
- {
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, cookie",
- ssl->handshake->verify_cookie,
- ssl->handshake->verify_cookie_len );
-
- *p++ = ssl->handshake->verify_cookie_len;
- memcpy( p, ssl->handshake->verify_cookie,
- ssl->handshake->verify_cookie_len );
- p += ssl->handshake->verify_cookie_len;
- }
- }
-#endif
-
- /*
- * Ciphersuite list
- */
- ciphersuites = ssl->conf->ciphersuite_list[ssl->minor_ver];
-
- /* Skip writing ciphersuite length for now */
- n = 0;
- q = p;
- p += 2;
-
- for( i = 0; ciphersuites[i] != 0; i++ )
- {
- ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( ciphersuites[i] );
-
- if( ssl_validate_ciphersuite( ciphersuite_info, ssl,
- ssl->conf->min_minor_ver,
- ssl->conf->max_minor_ver ) != 0 )
- continue;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, add ciphersuite: %04x",
- ciphersuites[i] ) );
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- uses_ec |= mbedtls_ssl_ciphersuite_uses_ec( ciphersuite_info );
-#endif
-
- n++;
- *p++ = (unsigned char)( ciphersuites[i] >> 8 );
- *p++ = (unsigned char)( ciphersuites[i] );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, got %d ciphersuites (excluding SCSVs)", n ) );
-
- /*
- * Add TLS_EMPTY_RENEGOTIATION_INFO_SCSV
- */
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE )
-#endif
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding EMPTY_RENEGOTIATION_INFO_SCSV" ) );
- *p++ = (unsigned char)( MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO >> 8 );
- *p++ = (unsigned char)( MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO );
- n++;
- }
-
- /* Some versions of OpenSSL don't handle it correctly if not at end */
-#if defined(MBEDTLS_SSL_FALLBACK_SCSV)
- if( ssl->conf->fallback == MBEDTLS_SSL_IS_FALLBACK )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "adding FALLBACK_SCSV" ) );
- *p++ = (unsigned char)( MBEDTLS_SSL_FALLBACK_SCSV_VALUE >> 8 );
- *p++ = (unsigned char)( MBEDTLS_SSL_FALLBACK_SCSV_VALUE );
- n++;
- }
-#endif
-
- *q++ = (unsigned char)( n >> 7 );
- *q++ = (unsigned char)( n << 1 );
-
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- offer_compress = 1;
-#else
- offer_compress = 0;
-#endif
-
- /*
- * We don't support compression with DTLS right now: if many records come
- * in the same datagram, uncompressing one could overwrite the next one.
- * We don't want to add complexity for handling that case unless there is
- * an actual need for it.
- */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- offer_compress = 0;
-#endif
-
- if( offer_compress )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, compress len.: %d", 2 ) );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, compress alg.: %d %d",
- MBEDTLS_SSL_COMPRESS_DEFLATE, MBEDTLS_SSL_COMPRESS_NULL ) );
-
- *p++ = 2;
- *p++ = MBEDTLS_SSL_COMPRESS_DEFLATE;
- *p++ = MBEDTLS_SSL_COMPRESS_NULL;
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, compress len.: %d", 1 ) );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, compress alg.: %d",
- MBEDTLS_SSL_COMPRESS_NULL ) );
-
- *p++ = 1;
- *p++ = MBEDTLS_SSL_COMPRESS_NULL;
- }
-
- // First write extensions, then the total length
- //
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- ssl_write_hostname_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
- /* Note that TLS_EMPTY_RENEGOTIATION_INFO_SCSV is always added
- * even if MBEDTLS_SSL_RENEGOTIATION is not defined. */
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- ssl_write_renegotiation_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- ssl_write_signature_algorithms_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( uses_ec )
- {
- ssl_write_supported_elliptic_curves_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-
- ssl_write_supported_point_formats_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
- }
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- ssl_write_ecjpake_kkpp_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
- ssl_write_cid_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
- ssl_write_max_fragment_length_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- ssl_write_truncated_hmac_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- ssl_write_encrypt_then_mac_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
- ssl_write_extended_ms_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_ALPN)
- ssl_write_alpn_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- ssl_write_session_ticket_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
- /* olen unused if all extensions are disabled */
- ((void) olen);
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello, total extension length: %d",
- ext_len ) );
-
- if( ext_len > 0 )
- {
- *p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ext_len ) & 0xFF );
- p += ext_len;
- }
-
- ssl->out_msglen = p - buf;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_CLIENT_HELLO;
-
- ssl->state++;
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- mbedtls_ssl_send_flight_completed( ssl );
-#endif
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret );
- return( ret );
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write client hello" ) );
-
- return( 0 );
-}
-
-static int ssl_parse_renegotiation_info( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- /* Check verify-data in constant-time. The length OTOH is no secret */
- if( len != 1 + ssl->verify_data_len * 2 ||
- buf[0] != ssl->verify_data_len * 2 ||
- mbedtls_ssl_safer_memcmp( buf + 1,
- ssl->own_verify_data, ssl->verify_data_len ) != 0 ||
- mbedtls_ssl_safer_memcmp( buf + 1 + ssl->verify_data_len,
- ssl->peer_verify_data, ssl->verify_data_len ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- }
- else
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
- {
- if( len != 1 || buf[0] != 0x00 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
- }
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-static int ssl_parse_max_fragment_length_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- /*
- * server should use the extension only if we did,
- * and if so the server's value should match ours (and len is always 1)
- */
- if( ssl->conf->mfl_code == MBEDTLS_SSL_MAX_FRAG_LEN_NONE ||
- len != 1 ||
- buf[0] != ssl->conf->mfl_code )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching max fragment length extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-static int ssl_parse_truncated_hmac_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->conf->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED ||
- len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching truncated HMAC extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->session_negotiate->trunc_hmac = MBEDTLS_SSL_TRUNC_HMAC_ENABLED;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-static int ssl_parse_cid_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- size_t peer_cid_len;
-
- if( /* CID extension only makes sense in DTLS */
- ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM ||
- /* The server must only send the CID extension if we have offered it. */
- ssl->negotiate_cid == MBEDTLS_SSL_CID_DISABLED )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension unexpected" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- if( len == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension invalid" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- peer_cid_len = *buf++;
- len--;
-
- if( peer_cid_len > MBEDTLS_SSL_CID_OUT_LEN_MAX )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension invalid" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- if( len != peer_cid_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "CID extension invalid" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ssl->handshake->cid_in_use = MBEDTLS_SSL_CID_ENABLED;
- ssl->handshake->peer_cid_len = (uint8_t) peer_cid_len;
- memcpy( ssl->handshake->peer_cid, buf, peer_cid_len );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Use of CID extension negotiated" ) );
- MBEDTLS_SSL_DEBUG_BUF( 3, "Server CID", buf, peer_cid_len );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-static int ssl_parse_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->conf->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED ||
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
- len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching encrypt-then-MAC extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->session_negotiate->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
-static int ssl_parse_extended_ms_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->conf->extended_ms == MBEDTLS_SSL_EXTENDED_MS_DISABLED ||
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ||
- len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching extended master secret extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->handshake->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-static int ssl_parse_session_ticket_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( ssl->conf->session_tickets == MBEDTLS_SSL_SESSION_TICKETS_DISABLED ||
- len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching session ticket extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- ((void) buf);
-
- ssl->handshake->new_session_ticket = 1;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static int ssl_parse_supported_point_formats_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- size_t list_size;
- const unsigned char *p;
-
- if( len == 0 || (size_t)( buf[0] + 1 ) != len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- list_size = buf[0];
-
- p = buf + 1;
- while( list_size > 0 )
- {
- if( p[0] == MBEDTLS_ECP_PF_UNCOMPRESSED ||
- p[0] == MBEDTLS_ECP_PF_COMPRESSED )
- {
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
- ssl->handshake->ecdh_ctx.point_format = p[0];
-#endif
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- ssl->handshake->ecjpake_ctx.point_format = p[0];
-#endif
- MBEDTLS_SSL_DEBUG_MSG( 4, ( "point format selected: %d", p[0] ) );
- return( 0 );
- }
-
- list_size--;
- p++;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "no point format in common" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
-}
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
- MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static int ssl_parse_ecjpake_kkpp( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- if( ssl->handshake->ciphersuite_info->key_exchange !=
- MBEDTLS_KEY_EXCHANGE_ECJPAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip ecjpake kkpp extension" ) );
- return( 0 );
- }
-
- /* If we got here, we no longer need our cached extension */
- mbedtls_free( ssl->handshake->ecjpake_cache );
- ssl->handshake->ecjpake_cache = NULL;
- ssl->handshake->ecjpake_cache_len = 0;
-
- if( ( ret = mbedtls_ecjpake_read_round_one( &ssl->handshake->ecjpake_ctx,
- buf, len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_one", ret );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( ret );
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_SSL_ALPN)
-static int ssl_parse_alpn_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf, size_t len )
-{
- size_t list_len, name_len;
- const char **p;
-
- /* If we didn't send it, the server shouldn't send it */
- if( ssl->conf->alpn_list == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching ALPN extension" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- /*
- * opaque ProtocolName<1..2^8-1>;
- *
- * struct {
- * ProtocolName protocol_name_list<2..2^16-1>
- * } ProtocolNameList;
- *
- * the "ProtocolNameList" MUST contain exactly one "ProtocolName"
- */
-
- /* Min length is 2 (list_len) + 1 (name_len) + 1 (name) */
- if( len < 4 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- list_len = ( buf[0] << 8 ) | buf[1];
- if( list_len != len - 2 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- name_len = buf[2];
- if( name_len != list_len - 1 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- /* Check that the server chosen protocol was in our list and save it */
- for( p = ssl->conf->alpn_list; *p != NULL; p++ )
- {
- if( name_len == strlen( *p ) &&
- memcmp( buf + 3, *p, name_len ) == 0 )
- {
- ssl->alpn_chosen = *p;
- return( 0 );
- }
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "ALPN extension: no matching protocol" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
-}
-#endif /* MBEDTLS_SSL_ALPN */
-
-/*
- * Parse HelloVerifyRequest. Only called after verifying the HS type.
- */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
-static int ssl_parse_hello_verify_request( mbedtls_ssl_context *ssl )
-{
- const unsigned char *p = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
- int major_ver, minor_ver;
- unsigned char cookie_len;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse hello verify request" ) );
-
- /*
- * struct {
- * ProtocolVersion server_version;
- * opaque cookie<0..2^8-1>;
- * } HelloVerifyRequest;
- */
- MBEDTLS_SSL_DEBUG_BUF( 3, "server version", p, 2 );
- mbedtls_ssl_read_version( &major_ver, &minor_ver, ssl->conf->transport, p );
- p += 2;
-
- /*
- * Since the RFC is not clear on this point, accept DTLS 1.0 (TLS 1.1)
- * even is lower than our min version.
- */
- if( major_ver < MBEDTLS_SSL_MAJOR_VERSION_3 ||
- minor_ver < MBEDTLS_SSL_MINOR_VERSION_2 ||
- major_ver > ssl->conf->max_major_ver ||
- minor_ver > ssl->conf->max_minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server version" ) );
-
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
-
- return( MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
- }
-
- cookie_len = *p++;
- MBEDTLS_SSL_DEBUG_BUF( 3, "cookie", p, cookie_len );
-
- if( ( ssl->in_msg + ssl->in_msglen ) - p < cookie_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1,
- ( "cookie length does not match incoming message size" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- mbedtls_free( ssl->handshake->verify_cookie );
-
- ssl->handshake->verify_cookie = mbedtls_calloc( 1, cookie_len );
- if( ssl->handshake->verify_cookie == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc failed (%d bytes)", cookie_len ) );
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
- }
-
- memcpy( ssl->handshake->verify_cookie, p, cookie_len );
- ssl->handshake->verify_cookie_len = cookie_len;
-
- /* Start over at ClientHello */
- ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
- mbedtls_ssl_reset_checksum( ssl );
-
- mbedtls_ssl_recv_flight_completed( ssl );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse hello verify request" ) );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
-static int ssl_parse_server_hello( mbedtls_ssl_context *ssl )
-{
- int ret, i;
- size_t n;
- size_t ext_len;
- unsigned char *buf, *ext;
- unsigned char comp;
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- int accept_comp;
-#endif
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- int renegotiation_info_seen = 0;
-#endif
- int handshake_failure = 0;
- const mbedtls_ssl_ciphersuite_t *suite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse server hello" ) );
-
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- /* No alert on a read error. */
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- return( ret );
- }
-
- buf = ssl->in_msg;
-
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
- {
- ssl->renego_records_seen++;
-
- if( ssl->conf->renego_max_records >= 0 &&
- ssl->renego_records_seen > ssl->conf->renego_max_records )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation requested, "
- "but not honored by server" ) );
- return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-handshake message during renego" ) );
-
- ssl->keep_current_message = 1;
- return( MBEDTLS_ERR_SSL_WAITING_SERVER_HELLO_RENEGO );
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
- return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- {
- if( buf[0] == MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "received hello verify request" ) );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse server hello" ) );
- return( ssl_parse_hello_verify_request( ssl ) );
- }
- else
- {
- /* We made it through the verification process */
- mbedtls_free( ssl->handshake->verify_cookie );
- ssl->handshake->verify_cookie = NULL;
- ssl->handshake->verify_cookie_len = 0;
- }
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- if( ssl->in_hslen < 38 + mbedtls_ssl_hs_hdr_len( ssl ) ||
- buf[0] != MBEDTLS_SSL_HS_SERVER_HELLO )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- /*
- * 0 . 1 server_version
- * 2 . 33 random (maybe including 4 bytes of Unix time)
- * 34 . 34 session_id length = n
- * 35 . 34+n session_id
- * 35+n . 36+n cipher_suite
- * 37+n . 37+n compression_method
- *
- * 38+n . 39+n extensions length (optional)
- * 40+n . .. extensions
- */
- buf += mbedtls_ssl_hs_hdr_len( ssl );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, version", buf + 0, 2 );
- mbedtls_ssl_read_version( &ssl->major_ver, &ssl->minor_ver,
- ssl->conf->transport, buf + 0 );
-
- if( ssl->major_ver < ssl->conf->min_major_ver ||
- ssl->minor_ver < ssl->conf->min_minor_ver ||
- ssl->major_ver > ssl->conf->max_major_ver ||
- ssl->minor_ver > ssl->conf->max_minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server version out of bounds - "
- " min: [%d:%d], server: [%d:%d], max: [%d:%d]",
- ssl->conf->min_major_ver, ssl->conf->min_minor_ver,
- ssl->major_ver, ssl->minor_ver,
- ssl->conf->max_major_ver, ssl->conf->max_minor_ver ) );
-
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
-
- return( MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, current time: %lu",
- ( (uint32_t) buf[2] << 24 ) |
- ( (uint32_t) buf[3] << 16 ) |
- ( (uint32_t) buf[4] << 8 ) |
- ( (uint32_t) buf[5] ) ) );
-
- memcpy( ssl->handshake->randbytes + 32, buf + 2, 32 );
-
- n = buf[34];
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, random bytes", buf + 2, 32 );
-
- if( n > 32 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- if( ssl->in_hslen > mbedtls_ssl_hs_hdr_len( ssl ) + 39 + n )
- {
- ext_len = ( ( buf[38 + n] << 8 )
- | ( buf[39 + n] ) );
-
- if( ( ext_len > 0 && ext_len < 4 ) ||
- ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + 40 + n + ext_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- }
- else if( ssl->in_hslen == mbedtls_ssl_hs_hdr_len( ssl ) + 38 + n )
- {
- ext_len = 0;
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- /* ciphersuite (used later) */
- i = ( buf[35 + n] << 8 ) | buf[36 + n];
-
- /*
- * Read and check compression
- */
- comp = buf[37 + n];
-
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- /* See comments in ssl_write_client_hello() */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- accept_comp = 0;
- else
-#endif
- accept_comp = 1;
-
- if( comp != MBEDTLS_SSL_COMPRESS_NULL &&
- ( comp != MBEDTLS_SSL_COMPRESS_DEFLATE || accept_comp == 0 ) )
-#else /* MBEDTLS_ZLIB_SUPPORT */
- if( comp != MBEDTLS_SSL_COMPRESS_NULL )
-#endif/* MBEDTLS_ZLIB_SUPPORT */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server hello, bad compression: %d", comp ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
- }
-
- /*
- * Initialize update checksum functions
- */
- ssl->handshake->ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( i );
- if( ssl->handshake->ciphersuite_info == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "ciphersuite info for %04x not found", i ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- mbedtls_ssl_optimize_checksum( ssl, ssl->handshake->ciphersuite_info );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, session id len.: %d", n ) );
- MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, session id", buf + 35, n );
-
- /*
- * Check if the session can be resumed
- */
- if( ssl->handshake->resume == 0 || n == 0 ||
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE ||
-#endif
- ssl->session_negotiate->ciphersuite != i ||
- ssl->session_negotiate->compression != comp ||
- ssl->session_negotiate->id_len != n ||
- memcmp( ssl->session_negotiate->id, buf + 35, n ) != 0 )
- {
- ssl->state++;
- ssl->handshake->resume = 0;
-#if defined(MBEDTLS_HAVE_TIME)
- ssl->session_negotiate->start = mbedtls_time( NULL );
-#endif
- ssl->session_negotiate->ciphersuite = i;
- ssl->session_negotiate->compression = comp;
- ssl->session_negotiate->id_len = n;
- memcpy( ssl->session_negotiate->id, buf + 35, n );
- }
- else
- {
- ssl->state = MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC;
-
- if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
- return( ret );
- }
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "%s session has been resumed",
- ssl->handshake->resume ? "a" : "no" ) );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: %04x", i ) );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, compress alg.: %d", buf[37 + n] ) );
-
- /*
- * Perform cipher suite validation in same way as in ssl_write_client_hello.
- */
- i = 0;
- while( 1 )
- {
- if( ssl->conf->ciphersuite_list[ssl->minor_ver][i] == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- if( ssl->conf->ciphersuite_list[ssl->minor_ver][i++] ==
- ssl->session_negotiate->ciphersuite )
- {
- break;
- }
- }
-
- suite_info = mbedtls_ssl_ciphersuite_from_id( ssl->session_negotiate->ciphersuite );
- if( ssl_validate_ciphersuite( suite_info, ssl, ssl->minor_ver, ssl->minor_ver ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: %s", suite_info->name ) );
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( suite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA &&
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- ssl->handshake->ecrs_enabled = 1;
- }
-#endif
-
- if( comp != MBEDTLS_SSL_COMPRESS_NULL
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- && comp != MBEDTLS_SSL_COMPRESS_DEFLATE
-#endif
- )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- ssl->session_negotiate->compression = comp;
-
- ext = buf + 40 + n;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "server hello, total extension length: %d", ext_len ) );
-
- while( ext_len )
- {
- unsigned int ext_id = ( ( ext[0] << 8 )
- | ( ext[1] ) );
- unsigned int ext_size = ( ( ext[2] << 8 )
- | ( ext[3] ) );
-
- if( ext_size + 4 > ext_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- switch( ext_id )
- {
- case MBEDTLS_TLS_EXT_RENEGOTIATION_INFO:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found renegotiation extension" ) );
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- renegotiation_info_seen = 1;
-#endif
-
- if( ( ret = ssl_parse_renegotiation_info( ssl, ext + 4,
- ext_size ) ) != 0 )
- return( ret );
-
- break;
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
- case MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found max_fragment_length extension" ) );
-
- if( ( ret = ssl_parse_max_fragment_length_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- case MBEDTLS_TLS_EXT_TRUNCATED_HMAC:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found truncated_hmac extension" ) );
-
- if( ( ret = ssl_parse_truncated_hmac_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
- case MBEDTLS_TLS_EXT_CID:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found CID extension" ) );
-
- if( ( ret = ssl_parse_cid_ext( ssl,
- ext + 4,
- ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- case MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found encrypt_then_mac extension" ) );
-
- if( ( ret = ssl_parse_encrypt_then_mac_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
- case MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found extended_master_secret extension" ) );
-
- if( ( ret = ssl_parse_extended_ms_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- case MBEDTLS_TLS_EXT_SESSION_TICKET:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found session_ticket extension" ) );
-
- if( ( ret = ssl_parse_session_ticket_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- case MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found supported_point_formats extension" ) );
-
- if( ( ret = ssl_parse_supported_point_formats_ext( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
- MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- case MBEDTLS_TLS_EXT_ECJPAKE_KKPP:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found ecjpake_kkpp extension" ) );
-
- if( ( ret = ssl_parse_ecjpake_kkpp( ssl,
- ext + 4, ext_size ) ) != 0 )
- {
- return( ret );
- }
-
- break;
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_SSL_ALPN)
- case MBEDTLS_TLS_EXT_ALPN:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found alpn extension" ) );
-
- if( ( ret = ssl_parse_alpn_ext( ssl, ext + 4, ext_size ) ) != 0 )
- return( ret );
-
- break;
-#endif /* MBEDTLS_SSL_ALPN */
-
- default:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "unknown extension found: %d (ignoring)",
- ext_id ) );
- }
-
- ext_len -= 4 + ext_size;
- ext += 4 + ext_size;
-
- if( ext_len > 0 && ext_len < 4 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
- }
-
- /*
- * Renegotiation security checks
- */
- if( ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
- ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation, breaking off handshake" ) );
- handshake_failure = 1;
- }
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
- ssl->secure_renegotiation == MBEDTLS_SSL_SECURE_RENEGOTIATION &&
- renegotiation_info_seen == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation_info extension missing (secure)" ) );
- handshake_failure = 1;
- }
- else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
- ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
- ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation not allowed" ) );
- handshake_failure = 1;
- }
- else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
- ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
- renegotiation_info_seen == 1 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation_info extension present (legacy)" ) );
- handshake_failure = 1;
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
- if( handshake_failure == 1 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse server hello" ) );
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
-static int ssl_parse_server_dh_params( mbedtls_ssl_context *ssl, unsigned char **p,
- unsigned char *end )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
-
- /*
- * Ephemeral DH parameters:
- *
- * struct {
- * opaque dh_p<1..2^16-1>;
- * opaque dh_g<1..2^16-1>;
- * opaque dh_Ys<1..2^16-1>;
- * } ServerDHParams;
- */
- if( ( ret = mbedtls_dhm_read_params( &ssl->handshake->dhm_ctx, p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 2, ( "mbedtls_dhm_read_params" ), ret );
- return( ret );
- }
-
- if( ssl->handshake->dhm_ctx.len * 8 < ssl->conf->dhm_min_bitlen )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "DHM prime too short: %d < %d",
- ssl->handshake->dhm_ctx.len * 8,
- ssl->conf->dhm_min_bitlen ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: P ", &ssl->handshake->dhm_ctx.P );
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: G ", &ssl->handshake->dhm_ctx.G );
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: GY", &ssl->handshake->dhm_ctx.GY );
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
-static int ssl_check_server_ecdh_params( const mbedtls_ssl_context *ssl )
-{
- const mbedtls_ecp_curve_info *curve_info;
- mbedtls_ecp_group_id grp_id;
-#if defined(MBEDTLS_ECDH_LEGACY_CONTEXT)
- grp_id = ssl->handshake->ecdh_ctx.grp.id;
-#else
- grp_id = ssl->handshake->ecdh_ctx.grp_id;
-#endif
-
- curve_info = mbedtls_ecp_curve_info_from_grp_id( grp_id );
- if( curve_info == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "ECDH curve: %s", curve_info->name ) );
-
-#if defined(MBEDTLS_ECP_C)
- if( mbedtls_ssl_check_curve( ssl, grp_id ) != 0 )
-#else
- if( ssl->handshake->ecdh_ctx.grp.nbits < 163 ||
- ssl->handshake->ecdh_ctx.grp.nbits > 521 )
-#endif
- return( -1 );
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_QP );
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO) && \
- ( defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) )
-static int ssl_parse_server_ecdh_params_psa( mbedtls_ssl_context *ssl,
- unsigned char **p,
- unsigned char *end )
-{
- uint16_t tls_id;
- size_t ecdh_bits = 0;
- uint8_t ecpoint_len;
- mbedtls_ssl_handshake_params *handshake = ssl->handshake;
-
- /*
- * Parse ECC group
- */
-
- if( end - *p < 4 )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
-
- /* First byte is curve_type; only named_curve is handled */
- if( *(*p)++ != MBEDTLS_ECP_TLS_NAMED_CURVE )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
-
- /* Next two bytes are the namedcurve value */
- tls_id = *(*p)++;
- tls_id <<= 8;
- tls_id |= *(*p)++;
-
- /* Convert EC group to PSA key type. */
- if( ( handshake->ecdh_psa_type =
- mbedtls_psa_parse_tls_ecc_group( tls_id, &ecdh_bits ) ) == 0 )
- {
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- if( ecdh_bits > 0xffff )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- handshake->ecdh_bits = (uint16_t) ecdh_bits;
-
- /*
- * Put peer's ECDH public key in the format understood by PSA.
- */
-
- ecpoint_len = *(*p)++;
- if( (size_t)( end - *p ) < ecpoint_len )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
-
- if( mbedtls_psa_tls_ecpoint_to_psa_ec(
- *p, ecpoint_len,
- handshake->ecdh_psa_peerkey,
- sizeof( handshake->ecdh_psa_peerkey ),
- &handshake->ecdh_psa_peerkey_len ) != 0 )
- {
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
-
- *p += ecpoint_len;
- return( 0 );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO &&
- ( MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ) */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
-static int ssl_parse_server_ecdh_params( mbedtls_ssl_context *ssl,
- unsigned char **p,
- unsigned char *end )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
-
- /*
- * Ephemeral ECDH parameters:
- *
- * struct {
- * ECParameters curve_params;
- * ECPoint public;
- * } ServerECDHParams;
- */
- if( ( ret = mbedtls_ecdh_read_params( &ssl->handshake->ecdh_ctx,
- (const unsigned char **) p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_read_params" ), ret );
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS )
- ret = MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS;
-#endif
- return( ret );
- }
-
- if( ssl_check_server_ecdh_params( ssl ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message (ECDHE curve)" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-static int ssl_parse_server_psk_hint( mbedtls_ssl_context *ssl,
- unsigned char **p,
- unsigned char *end )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
- size_t len;
- ((void) ssl);
-
- /*
- * PSK parameters:
- *
- * opaque psk_identity_hint<0..2^16-1>;
- */
- if( end - (*p) < 2 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
- "(psk_identity_hint length)" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- len = (*p)[0] << 8 | (*p)[1];
- *p += 2;
-
- if( end - (*p) < (int) len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message "
- "(psk_identity_hint length)" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- /*
- * Note: we currently ignore the PKS identity hint, as we only allow one
- * PSK to be provisionned on the client. This could be changed later if
- * someone needs that feature.
- */
- *p += len;
- ret = 0;
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
-/*
- * Generate a pre-master secret and encrypt it with the server's RSA key
- */
-static int ssl_write_encrypted_pms( mbedtls_ssl_context *ssl,
- size_t offset, size_t *olen,
- size_t pms_offset )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t len_bytes = ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ? 0 : 2;
- unsigned char *p = ssl->handshake->premaster + pms_offset;
- mbedtls_pk_context * peer_pk;
-
- if( offset + len_bytes > MBEDTLS_SSL_OUT_CONTENT_LEN )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small for encrypted pms" ) );
- return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
- }
-
- /*
- * Generate (part of) the pre-master as
- * struct {
- * ProtocolVersion client_version;
- * opaque random[46];
- * } PreMasterSecret;
- */
- mbedtls_ssl_write_version( ssl->conf->max_major_ver, ssl->conf->max_minor_ver,
- ssl->conf->transport, p );
-
- if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p + 2, 46 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "f_rng", ret );
- return( ret );
- }
-
- ssl->handshake->pmslen = 48;
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- peer_pk = &ssl->handshake->peer_pubkey;
-#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( ssl->session_negotiate->peer_cert == NULL )
- {
- /* Should never happen */
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
- peer_pk = &ssl->session_negotiate->peer_cert->pk;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- /*
- * Now write it out, encrypted
- */
- if( ! mbedtls_pk_can_do( peer_pk, MBEDTLS_PK_RSA ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate key type mismatch" ) );
- return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
- }
-
- if( ( ret = mbedtls_pk_encrypt( peer_pk,
- p, ssl->handshake->pmslen,
- ssl->out_msg + offset + len_bytes, olen,
- MBEDTLS_SSL_OUT_CONTENT_LEN - offset - len_bytes,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_rsa_pkcs1_encrypt", ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( len_bytes == 2 )
- {
- ssl->out_msg[offset+0] = (unsigned char)( *olen >> 8 );
- ssl->out_msg[offset+1] = (unsigned char)( *olen );
- *olen += 2;
- }
-#endif
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- /* We don't need the peer's public key anymore. Free it. */
- mbedtls_pk_free( peer_pk );
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
-static int ssl_parse_signature_algorithm( mbedtls_ssl_context *ssl,
- unsigned char **p,
- unsigned char *end,
- mbedtls_md_type_t *md_alg,
- mbedtls_pk_type_t *pk_alg )
-{
- ((void) ssl);
- *md_alg = MBEDTLS_MD_NONE;
- *pk_alg = MBEDTLS_PK_NONE;
-
- /* Only in TLS 1.2 */
- if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- return( 0 );
- }
-
- if( (*p) + 2 > end )
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
-
- /*
- * Get hash algorithm
- */
- if( ( *md_alg = mbedtls_ssl_md_alg_from_hash( (*p)[0] ) ) == MBEDTLS_MD_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Server used unsupported "
- "HashAlgorithm %d", *(p)[0] ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- /*
- * Get signature algorithm
- */
- if( ( *pk_alg = mbedtls_ssl_pk_alg_from_sig( (*p)[1] ) ) == MBEDTLS_PK_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used unsupported "
- "SignatureAlgorithm %d", (*p)[1] ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- /*
- * Check if the hash is acceptable
- */
- if( mbedtls_ssl_check_sig_hash( ssl, *md_alg ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server used HashAlgorithm %d that was not offered",
- *(p)[0] ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "Server used SignatureAlgorithm %d", (*p)[1] ) );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "Server used HashAlgorithm %d", (*p)[0] ) );
- *p += 2;
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
-static int ssl_get_ecdh_params_from_cert( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- const mbedtls_ecp_keypair *peer_key;
- mbedtls_pk_context * peer_pk;
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- peer_pk = &ssl->handshake->peer_pubkey;
-#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( ssl->session_negotiate->peer_cert == NULL )
- {
- /* Should never happen */
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
- peer_pk = &ssl->session_negotiate->peer_cert->pk;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- if( ! mbedtls_pk_can_do( peer_pk, MBEDTLS_PK_ECKEY ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server key not ECDH capable" ) );
- return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
- }
-
- peer_key = mbedtls_pk_ec( *peer_pk );
-
- if( ( ret = mbedtls_ecdh_get_params( &ssl->handshake->ecdh_ctx, peer_key,
- MBEDTLS_ECDH_THEIRS ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_get_params" ), ret );
- return( ret );
- }
-
- if( ssl_check_server_ecdh_params( ssl ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server certificate (ECDH curve)" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
- }
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- /* We don't need the peer's public key anymore. Free it,
- * so that more RAM is available for upcoming expensive
- * operations like ECDHE. */
- mbedtls_pk_free( peer_pk );
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
- MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-
-static int ssl_parse_server_key_exchange( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
- unsigned char *p = NULL, *end = NULL;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse server key exchange" ) );
-
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) );
- ssl->state++;
- return( 0 );
- }
- ((void) p);
- ((void) end);
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA )
- {
- if( ( ret = ssl_get_ecdh_params_from_cert( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "ssl_get_ecdh_params_from_cert", ret );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse server key exchange" ) );
- ssl->state++;
- return( 0 );
- }
- ((void) p);
- ((void) end);
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled &&
- ssl->handshake->ecrs_state == ssl_ecrs_ske_start_processing )
- {
- goto start_processing;
- }
-#endif
-
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
- return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- /*
- * ServerKeyExchange may be skipped with PSK and RSA-PSK when the server
- * doesn't use a psk_identity_hint
- */
- if( ssl->in_msg[0] != MBEDTLS_SSL_HS_SERVER_KEY_EXCHANGE )
- {
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
- {
- /* Current message is probably either
- * CertificateRequest or ServerHelloDone */
- ssl->keep_current_message = 1;
- goto exit;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server key exchange message must "
- "not be skipped" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
-
- return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled )
- ssl->handshake->ecrs_state = ssl_ecrs_ske_start_processing;
-
-start_processing:
-#endif
- p = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
- end = ssl->in_msg + ssl->in_hslen;
- MBEDTLS_SSL_DEBUG_BUF( 3, "server key exchange", p, end - p );
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
- {
- if( ssl_parse_server_psk_hint( ssl, &p, end ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- } /* FALLTROUGH */
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
- ; /* nothing more to do */
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
- {
- if( ssl_parse_server_dh_params( ssl, &p, end ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
-#if defined(MBEDTLS_USE_PSA_CRYPTO) && \
- ( defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) )
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
- {
- if( ssl_parse_server_ecdh_params_psa( ssl, &p, end ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- }
- else
-#endif /* MBEDTLS_USE_PSA_CRYPTO &&
- ( MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ) */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
- {
- if( ssl_parse_server_ecdh_params( ssl, &p, end ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
- {
- ret = mbedtls_ecjpake_read_round_two( &ssl->handshake->ecjpake_ctx,
- p, end - p );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_two", ret );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
- if( mbedtls_ssl_ciphersuite_uses_server_signature( ciphersuite_info ) )
- {
- size_t sig_len, hashlen;
- unsigned char hash[64];
- mbedtls_md_type_t md_alg = MBEDTLS_MD_NONE;
- mbedtls_pk_type_t pk_alg = MBEDTLS_PK_NONE;
- unsigned char *params = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
- size_t params_len = p - params;
- void *rs_ctx = NULL;
-
- mbedtls_pk_context * peer_pk;
-
- /*
- * Handle the digitally-signed structure
- */
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- if( ssl_parse_signature_algorithm( ssl, &p, end,
- &md_alg, &pk_alg ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- if( pk_alg != mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- pk_alg = mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
-
- /* Default hash for ECDSA is SHA-1 */
- if( pk_alg == MBEDTLS_PK_ECDSA && md_alg == MBEDTLS_MD_NONE )
- md_alg = MBEDTLS_MD_SHA1;
- }
- else
-#endif
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- /*
- * Read signature
- */
-
- if( p > end - 2 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
- sig_len = ( p[0] << 8 ) | p[1];
- p += 2;
-
- if( p != end - sig_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "signature", p, sig_len );
-
- /*
- * Compute the hash that has been signed
- */
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- if( md_alg == MBEDTLS_MD_NONE )
- {
- hashlen = 36;
- ret = mbedtls_ssl_get_key_exchange_md_ssl_tls( ssl, hash, params,
- params_len );
- if( ret != 0 )
- return( ret );
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 || \
- MBEDTLS_SSL_PROTO_TLS1_1 */
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( md_alg != MBEDTLS_MD_NONE )
- {
- ret = mbedtls_ssl_get_key_exchange_md_tls1_2( ssl, hash, &hashlen,
- params, params_len,
- md_alg );
- if( ret != 0 )
- return( ret );
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \
- MBEDTLS_SSL_PROTO_TLS1_2 */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "parameters hash", hash, hashlen );
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- peer_pk = &ssl->handshake->peer_pubkey;
-#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( ssl->session_negotiate->peer_cert == NULL )
- {
- /* Should never happen */
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
- peer_pk = &ssl->session_negotiate->peer_cert->pk;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- /*
- * Verify signature
- */
- if( !mbedtls_pk_can_do( peer_pk, pk_alg ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server key exchange message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
- }
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled )
- rs_ctx = &ssl->handshake->ecrs_ctx.pk;
-#endif
-
- if( ( ret = mbedtls_pk_verify_restartable( peer_pk,
- md_alg, hash, hashlen, p, sig_len, rs_ctx ) ) != 0 )
- {
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret != MBEDTLS_ERR_ECP_IN_PROGRESS )
-#endif
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECRYPT_ERROR );
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_pk_verify", ret );
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS )
- ret = MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS;
-#endif
- return( ret );
- }
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- /* We don't need the peer's public key anymore. Free it,
- * so that more RAM is available for upcoming expensive
- * operations like ECDHE. */
- mbedtls_pk_free( peer_pk );
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
-
-exit:
- ssl->state++;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse server key exchange" ) );
-
- return( 0 );
-}
-
-#if ! defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
-static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) );
-
- if( ! mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate request" ) );
- ssl->state++;
- return( 0 );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-}
-#else /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
-static int ssl_parse_certificate_request( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char *buf;
- size_t n = 0;
- size_t cert_type_len = 0, dn_len = 0;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate request" ) );
-
- if( ! mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate request" ) );
- ssl->state++;
- return( 0 );
- }
-
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
- return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- ssl->state++;
- ssl->client_auth = ( ssl->in_msg[0] == MBEDTLS_SSL_HS_CERTIFICATE_REQUEST );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "got %s certificate request",
- ssl->client_auth ? "a" : "no" ) );
-
- if( ssl->client_auth == 0 )
- {
- /* Current message is probably the ServerHelloDone */
- ssl->keep_current_message = 1;
- goto exit;
- }
-
- /*
- * struct {
- * ClientCertificateType certificate_types<1..2^8-1>;
- * SignatureAndHashAlgorithm
- * supported_signature_algorithms<2^16-1>; -- TLS 1.2 only
- * DistinguishedName certificate_authorities<0..2^16-1>;
- * } CertificateRequest;
- *
- * Since we only support a single certificate on clients, let's just
- * ignore all the information that's supposed to help us pick a
- * certificate.
- *
- * We could check that our certificate matches the request, and bail out
- * if it doesn't, but it's simpler to just send the certificate anyway,
- * and give the server the opportunity to decide if it should terminate
- * the connection when it doesn't like our certificate.
- *
- * Same goes for the hash in TLS 1.2's signature_algorithms: at this
- * point we only have one hash available (see comments in
- * write_certificate_verify), so let's just use what we have.
- *
- * However, we still minimally parse the message to check it is at least
- * superficially sane.
- */
- buf = ssl->in_msg;
-
- /* certificate_types */
- if( ssl->in_hslen <= mbedtls_ssl_hs_hdr_len( ssl ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
- }
- cert_type_len = buf[mbedtls_ssl_hs_hdr_len( ssl )];
- n = cert_type_len;
-
- /*
- * In the subsequent code there are two paths that read from buf:
- * * the length of the signature algorithms field (if minor version of
- * SSL is 3),
- * * distinguished name length otherwise.
- * Both reach at most the index:
- * ...hdr_len + 2 + n,
- * therefore the buffer length at this point must be greater than that
- * regardless of the actual code path.
- */
- if( ssl->in_hslen <= mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
- }
-
- /* supported_signature_algorithms */
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- size_t sig_alg_len = ( ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 1 + n] << 8 )
- | ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n] ) );
-#if defined(MBEDTLS_DEBUG_C)
- unsigned char* sig_alg;
- size_t i;
-#endif
-
- /*
- * The furthest access in buf is in the loop few lines below:
- * sig_alg[i + 1],
- * where:
- * sig_alg = buf + ...hdr_len + 3 + n,
- * max(i) = sig_alg_len - 1.
- * Therefore the furthest access is:
- * buf[...hdr_len + 3 + n + sig_alg_len - 1 + 1],
- * which reduces to:
- * buf[...hdr_len + 3 + n + sig_alg_len],
- * which is one less than we need the buf to be.
- */
- if( ssl->in_hslen <= mbedtls_ssl_hs_hdr_len( ssl ) + 3 + n + sig_alg_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
- }
-
-#if defined(MBEDTLS_DEBUG_C)
- sig_alg = buf + mbedtls_ssl_hs_hdr_len( ssl ) + 3 + n;
- for( i = 0; i < sig_alg_len; i += 2 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Supported Signature Algorithm found: %d"
- ",%d", sig_alg[i], sig_alg[i + 1] ) );
- }
-#endif
-
- n += 2 + sig_alg_len;
- }
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
- /* certificate_authorities */
- dn_len = ( ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 1 + n] << 8 )
- | ( buf[mbedtls_ssl_hs_hdr_len( ssl ) + 2 + n] ) );
-
- n += dn_len;
- if( ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + 3 + n )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate request message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_REQUEST );
- }
-
-exit:
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate request" ) );
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
-
-static int ssl_parse_server_hello_done( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse server hello done" ) );
-
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) );
- return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- if( ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) ||
- ssl->in_msg[0] != MBEDTLS_SSL_HS_SERVER_HELLO_DONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad server hello done message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_HELLO_DONE );
- }
-
- ssl->state++;
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- mbedtls_ssl_recv_flight_completed( ssl );
-#endif
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse server hello done" ) );
-
- return( 0 );
-}
-
-static int ssl_write_client_key_exchange( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- size_t header_len;
- size_t content_len;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write client key exchange" ) );
-
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA )
- {
- /*
- * DHM key exchange -- send G^X mod P
- */
- content_len = ssl->handshake->dhm_ctx.len;
-
- ssl->out_msg[4] = (unsigned char)( content_len >> 8 );
- ssl->out_msg[5] = (unsigned char)( content_len );
- header_len = 6;
-
- ret = mbedtls_dhm_make_public( &ssl->handshake->dhm_ctx,
- (int) mbedtls_mpi_size( &ssl->handshake->dhm_ctx.P ),
- &ssl->out_msg[header_len], content_len,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_make_public", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: X ", &ssl->handshake->dhm_ctx.X );
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: GX", &ssl->handshake->dhm_ctx.GX );
-
- if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
- ssl->handshake->premaster,
- MBEDTLS_PREMASTER_SIZE,
- &ssl->handshake->pmslen,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED */
-#if defined(MBEDTLS_USE_PSA_CRYPTO) && \
- ( defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) )
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
- {
- psa_status_t status;
- psa_key_attributes_t key_attributes;
-
- mbedtls_ssl_handshake_params *handshake = ssl->handshake;
-
- unsigned char own_pubkey[MBEDTLS_PSA_MAX_EC_PUBKEY_LENGTH];
- size_t own_pubkey_len;
- unsigned char *own_pubkey_ecpoint;
- size_t own_pubkey_ecpoint_len;
-
- header_len = 4;
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "Perform PSA-based ECDH computation." ) );
-
- /*
- * Generate EC private key for ECDHE exchange.
- */
-
- /* The master secret is obtained from the shared ECDH secret by
- * applying the TLS 1.2 PRF with a specific salt and label. While
- * the PSA Crypto API encourages combining key agreement schemes
- * such as ECDH with fixed KDFs such as TLS 1.2 PRF, it does not
- * yet support the provisioning of salt + label to the KDF.
- * For the time being, we therefore need to split the computation
- * of the ECDH secret and the application of the TLS 1.2 PRF. */
- key_attributes = psa_key_attributes_init();
- psa_set_key_usage_flags( &key_attributes, PSA_KEY_USAGE_DERIVE );
- psa_set_key_algorithm( &key_attributes, PSA_ALG_ECDH );
- psa_set_key_type( &key_attributes, handshake->ecdh_psa_type );
- psa_set_key_bits( &key_attributes, handshake->ecdh_bits );
-
- /* Generate ECDH private key. */
- status = psa_generate_key( &key_attributes,
- &handshake->ecdh_psa_privkey );
- if( status != PSA_SUCCESS )
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
-
- /* Export the public part of the ECDH private key from PSA
- * and convert it to ECPoint format used in ClientKeyExchange. */
- status = psa_export_public_key( handshake->ecdh_psa_privkey,
- own_pubkey, sizeof( own_pubkey ),
- &own_pubkey_len );
- if( status != PSA_SUCCESS )
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
-
- if( mbedtls_psa_tls_psa_ec_to_ecpoint( own_pubkey,
- own_pubkey_len,
- &own_pubkey_ecpoint,
- &own_pubkey_ecpoint_len ) != 0 )
- {
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
-
- /* Copy ECPoint structure to outgoing message buffer. */
- ssl->out_msg[header_len] = (unsigned char) own_pubkey_ecpoint_len;
- memcpy( ssl->out_msg + header_len + 1,
- own_pubkey_ecpoint, own_pubkey_ecpoint_len );
- content_len = own_pubkey_ecpoint_len + 1;
-
- /* The ECDH secret is the premaster secret used for key derivation. */
-
- /* Compute ECDH shared secret. */
- status = psa_raw_key_agreement( PSA_ALG_ECDH,
- handshake->ecdh_psa_privkey,
- handshake->ecdh_psa_peerkey,
- handshake->ecdh_psa_peerkey_len,
- ssl->handshake->premaster,
- sizeof( ssl->handshake->premaster ),
- &ssl->handshake->pmslen );
- if( status != PSA_SUCCESS )
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
-
- status = psa_destroy_key( handshake->ecdh_psa_privkey );
- if( status != PSA_SUCCESS )
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- handshake->ecdh_psa_privkey = 0;
- }
- else
-#endif /* MBEDTLS_USE_PSA_CRYPTO &&
- ( MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ) */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA )
- {
- /*
- * ECDH key exchange -- send client public value
- */
- header_len = 4;
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled )
- {
- if( ssl->handshake->ecrs_state == ssl_ecrs_cke_ecdh_calc_secret )
- goto ecdh_calc_secret;
-
- mbedtls_ecdh_enable_restart( &ssl->handshake->ecdh_ctx );
- }
-#endif
-
- ret = mbedtls_ecdh_make_public( &ssl->handshake->ecdh_ctx,
- &content_len,
- &ssl->out_msg[header_len], 1000,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_make_public", ret );
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS )
- ret = MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS;
-#endif
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_Q );
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled )
- {
- ssl->handshake->ecrs_n = content_len;
- ssl->handshake->ecrs_state = ssl_ecrs_cke_ecdh_calc_secret;
- }
-
-ecdh_calc_secret:
- if( ssl->handshake->ecrs_enabled )
- content_len = ssl->handshake->ecrs_n;
-#endif
- if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx,
- &ssl->handshake->pmslen,
- ssl->handshake->premaster,
- MBEDTLS_MPI_MAX_SIZE,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret );
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS )
- ret = MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS;
-#endif
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_Z );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
- if( mbedtls_ssl_ciphersuite_uses_psk( ciphersuite_info ) )
- {
- /*
- * opaque psk_identity<0..2^16-1>;
- */
- if( ssl_conf_has_static_psk( ssl->conf ) == 0 )
- {
- /* We don't offer PSK suites if we don't have a PSK,
- * and we check that the server's choice is among the
- * ciphersuites we offered, so this should never happen. */
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- header_len = 4;
- content_len = ssl->conf->psk_identity_len;
-
- if( header_len + 2 + content_len > MBEDTLS_SSL_OUT_CONTENT_LEN )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "psk identity too long or "
- "SSL buffer too short" ) );
- return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
- }
-
- ssl->out_msg[header_len++] = (unsigned char)( content_len >> 8 );
- ssl->out_msg[header_len++] = (unsigned char)( content_len );
-
- memcpy( ssl->out_msg + header_len,
- ssl->conf->psk_identity,
- ssl->conf->psk_identity_len );
- header_len += ssl->conf->psk_identity_len;
-
-#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK )
- {
- content_len = 0;
- }
- else
-#endif
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
- {
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Opaque PSKs are currently only supported for PSK-only suites. */
- if( ssl_conf_has_static_raw_psk( ssl->conf ) == 0 )
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
- if( ( ret = ssl_write_encrypted_pms( ssl, header_len,
- &content_len, 2 ) ) != 0 )
- return( ret );
- }
- else
-#endif
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
- {
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Opaque PSKs are currently only supported for PSK-only suites. */
- if( ssl_conf_has_static_raw_psk( ssl->conf ) == 0 )
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
- /*
- * ClientDiffieHellmanPublic public (DHM send G^X mod P)
- */
- content_len = ssl->handshake->dhm_ctx.len;
-
- if( header_len + 2 + content_len >
- MBEDTLS_SSL_OUT_CONTENT_LEN )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "psk identity or DHM size too long"
- " or SSL buffer too short" ) );
- return( MBEDTLS_ERR_SSL_BUFFER_TOO_SMALL );
- }
-
- ssl->out_msg[header_len++] = (unsigned char)( content_len >> 8 );
- ssl->out_msg[header_len++] = (unsigned char)( content_len );
-
- ret = mbedtls_dhm_make_public( &ssl->handshake->dhm_ctx,
- (int) mbedtls_mpi_size( &ssl->handshake->dhm_ctx.P ),
- &ssl->out_msg[header_len], content_len,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_make_public", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
- {
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Opaque PSKs are currently only supported for PSK-only suites. */
- if( ssl_conf_has_static_raw_psk( ssl->conf ) == 0 )
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
- /*
- * ClientECDiffieHellmanPublic public;
- */
- ret = mbedtls_ecdh_make_public( &ssl->handshake->ecdh_ctx,
- &content_len,
- &ssl->out_msg[header_len],
- MBEDTLS_SSL_OUT_CONTENT_LEN - header_len,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_make_public", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_Q );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO) && \
- defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK &&
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 &&
- ssl_conf_has_static_raw_psk( ssl->conf ) == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "skip PMS generation for opaque PSK" ) );
- }
- else
-#endif /* MBEDTLS_USE_PSA_CRYPTO &&
- MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
- if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA )
- {
- header_len = 4;
- if( ( ret = ssl_write_encrypted_pms( ssl, header_len,
- &content_len, 0 ) ) != 0 )
- return( ret );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
- {
- header_len = 4;
-
- ret = mbedtls_ecjpake_write_round_two( &ssl->handshake->ecjpake_ctx,
- ssl->out_msg + header_len,
- MBEDTLS_SSL_OUT_CONTENT_LEN - header_len,
- &content_len,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_write_round_two", ret );
- return( ret );
- }
-
- ret = mbedtls_ecjpake_derive_secret( &ssl->handshake->ecjpake_ctx,
- ssl->handshake->premaster, 32, &ssl->handshake->pmslen,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_derive_secret", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED */
- {
- ((void) ciphersuite_info);
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- ssl->out_msglen = header_len + content_len;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_CLIENT_KEY_EXCHANGE;
-
- ssl->state++;
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write client key exchange" ) );
-
- return( 0 );
-}
-
-#if !defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
-static int ssl_write_certificate_verify( mbedtls_ssl_context *ssl )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
-
- if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
- return( ret );
- }
-
- if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-}
-#else /* !MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
-static int ssl_write_certificate_verify( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
- size_t n = 0, offset = 0;
- unsigned char hash[48];
- unsigned char *hash_start = hash;
- mbedtls_md_type_t md_alg = MBEDTLS_MD_NONE;
- size_t hashlen;
- void *rs_ctx = NULL;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate verify" ) );
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled &&
- ssl->handshake->ecrs_state == ssl_ecrs_crt_vrfy_sign )
- {
- goto sign;
- }
-#endif
-
- if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
- return( ret );
- }
-
- if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-
- if( ssl->client_auth == 0 || mbedtls_ssl_own_cert( ssl ) == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-
- if( mbedtls_ssl_own_key( ssl ) == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no private key for certificate" ) );
- return( MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED );
- }
-
- /*
- * Make a signature of the handshake digests
- */
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled )
- ssl->handshake->ecrs_state = ssl_ecrs_crt_vrfy_sign;
-
-sign:
-#endif
-
- ssl->handshake->calc_verify( ssl, hash, &hashlen );
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- /*
- * digitally-signed struct {
- * opaque md5_hash[16];
- * opaque sha_hash[20];
- * };
- *
- * md5_hash
- * MD5(handshake_messages);
- *
- * sha_hash
- * SHA(handshake_messages);
- */
- md_alg = MBEDTLS_MD_NONE;
-
- /*
- * For ECDSA, default hash is SHA-1 only
- */
- if( mbedtls_pk_can_do( mbedtls_ssl_own_key( ssl ), MBEDTLS_PK_ECDSA ) )
- {
- hash_start += 16;
- hashlen -= 16;
- md_alg = MBEDTLS_MD_SHA1;
- }
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 || \
- MBEDTLS_SSL_PROTO_TLS1_1 */
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- /*
- * digitally-signed struct {
- * opaque handshake_messages[handshake_messages_length];
- * };
- *
- * Taking shortcut here. We assume that the server always allows the
- * PRF Hash function and has sent it in the allowed signature
- * algorithms list received in the Certificate Request message.
- *
- * Until we encounter a server that does not, we will take this
- * shortcut.
- *
- * Reason: Otherwise we should have running hashes for SHA512 and SHA224
- * in order to satisfy 'weird' needs from the server side.
- */
- if( ssl->handshake->ciphersuite_info->mac == MBEDTLS_MD_SHA384 )
- {
- md_alg = MBEDTLS_MD_SHA384;
- ssl->out_msg[4] = MBEDTLS_SSL_HASH_SHA384;
- }
- else
- {
- md_alg = MBEDTLS_MD_SHA256;
- ssl->out_msg[4] = MBEDTLS_SSL_HASH_SHA256;
- }
- ssl->out_msg[5] = mbedtls_ssl_sig_from_pk( mbedtls_ssl_own_key( ssl ) );
-
- /* Info from md_alg will be used instead */
- hashlen = 0;
- offset = 2;
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled )
- rs_ctx = &ssl->handshake->ecrs_ctx.pk;
-#endif
-
- if( ( ret = mbedtls_pk_sign_restartable( mbedtls_ssl_own_key( ssl ),
- md_alg, hash_start, hashlen,
- ssl->out_msg + 6 + offset, &n,
- ssl->conf->f_rng, ssl->conf->p_rng, rs_ctx ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_pk_sign", ret );
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS )
- ret = MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS;
-#endif
- return( ret );
- }
-
- ssl->out_msg[4 + offset] = (unsigned char)( n >> 8 );
- ssl->out_msg[5 + offset] = (unsigned char)( n );
-
- ssl->out_msglen = 6 + n + offset;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE_VERIFY;
-
- ssl->state++;
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate verify" ) );
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-static int ssl_parse_new_session_ticket( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- uint32_t lifetime;
- size_t ticket_len;
- unsigned char *ticket;
- const unsigned char *msg;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse new session ticket" ) );
-
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
- return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- /*
- * struct {
- * uint32 ticket_lifetime_hint;
- * opaque ticket<0..2^16-1>;
- * } NewSessionTicket;
- *
- * 0 . 3 ticket_lifetime_hint
- * 4 . 5 ticket_len (n)
- * 6 . 5+n ticket content
- */
- if( ssl->in_msg[0] != MBEDTLS_SSL_HS_NEW_SESSION_TICKET ||
- ssl->in_hslen < 6 + mbedtls_ssl_hs_hdr_len( ssl ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET );
- }
-
- msg = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
-
- lifetime = ( ((uint32_t) msg[0]) << 24 ) | ( msg[1] << 16 ) |
- ( msg[2] << 8 ) | ( msg[3] );
-
- ticket_len = ( msg[4] << 8 ) | ( msg[5] );
-
- if( ticket_len + 6 + mbedtls_ssl_hs_hdr_len( ssl ) != ssl->in_hslen )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad new session ticket message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_NEW_SESSION_TICKET );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket length: %d", ticket_len ) );
-
- /* We're not waiting for a NewSessionTicket message any more */
- ssl->handshake->new_session_ticket = 0;
- ssl->state = MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC;
-
- /*
- * Zero-length ticket means the server changed his mind and doesn't want
- * to send a ticket after all, so just forget it
- */
- if( ticket_len == 0 )
- return( 0 );
-
- if( ssl->session != NULL && ssl->session->ticket != NULL )
- {
- mbedtls_platform_zeroize( ssl->session->ticket,
- ssl->session->ticket_len );
- mbedtls_free( ssl->session->ticket );
- ssl->session->ticket = NULL;
- ssl->session->ticket_len = 0;
- }
-
- mbedtls_platform_zeroize( ssl->session_negotiate->ticket,
- ssl->session_negotiate->ticket_len );
- mbedtls_free( ssl->session_negotiate->ticket );
- ssl->session_negotiate->ticket = NULL;
- ssl->session_negotiate->ticket_len = 0;
-
- if( ( ticket = mbedtls_calloc( 1, ticket_len ) ) == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "ticket alloc failed" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
- }
-
- memcpy( ticket, msg + 6, ticket_len );
-
- ssl->session_negotiate->ticket = ticket;
- ssl->session_negotiate->ticket_len = ticket_len;
- ssl->session_negotiate->ticket_lifetime = lifetime;
-
- /*
- * RFC 5077 section 3.4:
- * "If the client receives a session ticket from the server, then it
- * discards any Session ID that was sent in the ServerHello."
- */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket in use, discarding session id" ) );
- ssl->session_negotiate->id_len = 0;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse new session ticket" ) );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-/*
- * SSL handshake -- client side -- single step
- */
-int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl )
-{
- int ret = 0;
-
- if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "client state: %d", ssl->state ) );
-
- if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
- return( ret );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
- {
- if( ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
- return( ret );
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- /* Change state now, so that it is right in mbedtls_ssl_read_record(), used
- * by DTLS for dropping out-of-sequence ChangeCipherSpec records */
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- if( ssl->state == MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC &&
- ssl->handshake->new_session_ticket != 0 )
- {
- ssl->state = MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET;
- }
-#endif
-
- switch( ssl->state )
- {
- case MBEDTLS_SSL_HELLO_REQUEST:
- ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
- break;
-
- /*
- * ==> ClientHello
- */
- case MBEDTLS_SSL_CLIENT_HELLO:
- ret = ssl_write_client_hello( ssl );
- break;
-
- /*
- * <== ServerHello
- * Certificate
- * ( ServerKeyExchange )
- * ( CertificateRequest )
- * ServerHelloDone
- */
- case MBEDTLS_SSL_SERVER_HELLO:
- ret = ssl_parse_server_hello( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_CERTIFICATE:
- ret = mbedtls_ssl_parse_certificate( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_KEY_EXCHANGE:
- ret = ssl_parse_server_key_exchange( ssl );
- break;
-
- case MBEDTLS_SSL_CERTIFICATE_REQUEST:
- ret = ssl_parse_certificate_request( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_HELLO_DONE:
- ret = ssl_parse_server_hello_done( ssl );
- break;
-
- /*
- * ==> ( Certificate/Alert )
- * ClientKeyExchange
- * ( CertificateVerify )
- * ChangeCipherSpec
- * Finished
- */
- case MBEDTLS_SSL_CLIENT_CERTIFICATE:
- ret = mbedtls_ssl_write_certificate( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_KEY_EXCHANGE:
- ret = ssl_write_client_key_exchange( ssl );
- break;
-
- case MBEDTLS_SSL_CERTIFICATE_VERIFY:
- ret = ssl_write_certificate_verify( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC:
- ret = mbedtls_ssl_write_change_cipher_spec( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_FINISHED:
- ret = mbedtls_ssl_write_finished( ssl );
- break;
-
- /*
- * <== ( NewSessionTicket )
- * ChangeCipherSpec
- * Finished
- */
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- case MBEDTLS_SSL_SERVER_NEW_SESSION_TICKET:
- ret = ssl_parse_new_session_ticket( ssl );
- break;
-#endif
-
- case MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC:
- ret = mbedtls_ssl_parse_change_cipher_spec( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_FINISHED:
- ret = mbedtls_ssl_parse_finished( ssl );
- break;
-
- case MBEDTLS_SSL_FLUSH_BUFFERS:
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
- ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
- break;
-
- case MBEDTLS_SSL_HANDSHAKE_WRAPUP:
- mbedtls_ssl_handshake_wrapup( ssl );
- break;
-
- default:
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- return( ret );
-}
#endif /* MBEDTLS_SSL_CLI_C */
diff --git a/library/ssl_msg.c b/library/ssl_msg.c
index f4bd349..b9c249e 100644
--- a/library/ssl_msg.c
+++ b/library/ssl_msg.c
@@ -458,6 +458,51 @@
}
}
+#if defined(MBEDTLS_SSL_PROTO_SSL3)
+/*
+ * SSLv3.0 MAC functions
+ */
+#define SSL_MAC_MAX_BYTES 20 /* MD-5 or SHA-1 */
+static void ssl_mac( mbedtls_md_context_t *md_ctx,
+ const unsigned char *secret,
+ const unsigned char *buf, size_t len,
+ const unsigned char *ctr, int type,
+ unsigned char out[SSL_MAC_MAX_BYTES] )
+{
+ unsigned char header[11];
+ unsigned char padding[48];
+ int padlen;
+ int md_size = mbedtls_md_get_size( md_ctx->md_info );
+ int md_type = mbedtls_md_get_type( md_ctx->md_info );
+
+ /* Only MD5 and SHA-1 supported */
+ if( md_type == MBEDTLS_MD_MD5 )
+ padlen = 48;
+ else
+ padlen = 40;
+
+ memcpy( header, ctr, 8 );
+ header[ 8] = (unsigned char) type;
+ header[ 9] = (unsigned char)( len >> 8 );
+ header[10] = (unsigned char)( len );
+
+ memset( padding, 0x36, padlen );
+ mbedtls_md_starts( md_ctx );
+ mbedtls_md_update( md_ctx, secret, md_size );
+ mbedtls_md_update( md_ctx, padding, padlen );
+ mbedtls_md_update( md_ctx, header, 11 );
+ mbedtls_md_update( md_ctx, buf, len );
+ mbedtls_md_finish( md_ctx, out );
+
+ memset( padding, 0x5C, padlen );
+ mbedtls_md_starts( md_ctx );
+ mbedtls_md_update( md_ctx, secret, md_size );
+ mbedtls_md_update( md_ctx, padding, padlen );
+ mbedtls_md_update( md_ctx, out, md_size );
+ mbedtls_md_finish( md_ctx, out );
+}
+#endif /* MBEDTLS_SSL_PROTO_SSL3 */
+
int mbedtls_ssl_encrypt_buf( mbedtls_ssl_context *ssl,
mbedtls_ssl_transform *transform,
mbedtls_record *rec,
diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index b0b09cd..a38ce90 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -81,4497 +81,4 @@
}
#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY */
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
-static int ssl_parse_servername_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t servername_list_size, hostname_len;
- const unsigned char *p;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "parse ServerName extension" ) );
-
- if( len < 2 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- servername_list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
- if( servername_list_size + 2 != len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- p = buf + 2;
- while( servername_list_size > 2 )
- {
- hostname_len = ( ( p[1] << 8 ) | p[2] );
- if( hostname_len + 3 > servername_list_size )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- if( p[0] == MBEDTLS_TLS_EXT_SERVERNAME_HOSTNAME )
- {
- ret = ssl->conf->f_sni( ssl->conf->p_sni,
- ssl, p + 3, hostname_len );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "ssl_sni_wrapper", ret );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_UNRECOGNIZED_NAME );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- return( 0 );
- }
-
- servername_list_size -= hostname_len + 3;
- p += hostname_len + 3;
- }
-
- if( servername_list_size != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-static int ssl_conf_has_psk_or_cb( mbedtls_ssl_config const *conf )
-{
- if( conf->f_psk != NULL )
- return( 1 );
-
- if( conf->psk_identity_len == 0 || conf->psk_identity == NULL )
- return( 0 );
-
- if( conf->psk != NULL && conf->psk_len != 0 )
- return( 1 );
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- if( conf->psk_opaque != 0 )
- return( 1 );
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
-static int ssl_use_opaque_psk( mbedtls_ssl_context const *ssl )
-{
- if( ssl->conf->f_psk != NULL )
- {
- /* If we've used a callback to select the PSK,
- * the static configuration is irrelevant. */
-
- if( ssl->handshake->psk_opaque != 0 )
- return( 1 );
-
- return( 0 );
- }
-
- if( ssl->conf->psk_opaque != 0 )
- return( 1 );
-
- return( 0 );
-}
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-static int ssl_parse_renegotiation_info( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- /* Check verify-data in constant-time. The length OTOH is no secret */
- if( len != 1 + ssl->verify_data_len ||
- buf[0] != ssl->verify_data_len ||
- mbedtls_ssl_safer_memcmp( buf + 1, ssl->peer_verify_data,
- ssl->verify_data_len ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- }
- else
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
- {
- if( len != 1 || buf[0] != 0x0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
- }
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-
-/*
- * Status of the implementation of signature-algorithms extension:
- *
- * Currently, we are only considering the signature-algorithm extension
- * to pick a ciphersuite which allows us to send the ServerKeyExchange
- * message with a signature-hash combination that the user allows.
- *
- * We do *not* check whether all certificates in our certificate
- * chain are signed with an allowed signature-hash pair.
- * This needs to be done at a later stage.
- *
- */
-static int ssl_parse_signature_algorithms_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- size_t sig_alg_list_size;
-
- const unsigned char *p;
- const unsigned char *end = buf + len;
-
- mbedtls_md_type_t md_cur;
- mbedtls_pk_type_t sig_cur;
-
- if ( len < 2 ) {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- sig_alg_list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
- if( sig_alg_list_size + 2 != len ||
- sig_alg_list_size % 2 != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /* Currently we only guarantee signing the ServerKeyExchange message according
- * to the constraints specified in this extension (see above), so it suffices
- * to remember only one suitable hash for each possible signature algorithm.
- *
- * This will change when we also consider certificate signatures,
- * in which case we will need to remember the whole signature-hash
- * pair list from the extension.
- */
-
- for( p = buf + 2; p < end; p += 2 )
- {
- /* Silently ignore unknown signature or hash algorithms. */
-
- if( ( sig_cur = mbedtls_ssl_pk_alg_from_sig( p[1] ) ) == MBEDTLS_PK_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext"
- " unknown sig alg encoding %d", p[1] ) );
- continue;
- }
-
- /* Check if we support the hash the user proposes */
- md_cur = mbedtls_ssl_md_alg_from_hash( p[0] );
- if( md_cur == MBEDTLS_MD_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext:"
- " unknown hash alg encoding %d", p[0] ) );
- continue;
- }
-
- if( mbedtls_ssl_check_sig_hash( ssl, md_cur ) == 0 )
- {
- mbedtls_ssl_sig_hash_set_add( &ssl->handshake->hash_algs, sig_cur, md_cur );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext:"
- " match sig %d and hash %d",
- sig_cur, md_cur ) );
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext: "
- "hash alg %d not supported", md_cur ) );
- }
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
- MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static int ssl_parse_supported_elliptic_curves( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- size_t list_size, our_size;
- const unsigned char *p;
- const mbedtls_ecp_curve_info *curve_info, **curves;
-
- if ( len < 2 ) {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- list_size = ( ( buf[0] << 8 ) | ( buf[1] ) );
- if( list_size + 2 != len ||
- list_size % 2 != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /* Should never happen unless client duplicates the extension */
- if( ssl->handshake->curves != NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /* Don't allow our peer to make us allocate too much memory,
- * and leave room for a final 0 */
- our_size = list_size / 2 + 1;
- if( our_size > MBEDTLS_ECP_DP_MAX )
- our_size = MBEDTLS_ECP_DP_MAX;
-
- if( ( curves = mbedtls_calloc( our_size, sizeof( *curves ) ) ) == NULL )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
- }
-
- ssl->handshake->curves = curves;
-
- p = buf + 2;
- while( list_size > 0 && our_size > 1 )
- {
- curve_info = mbedtls_ecp_curve_info_from_tls_id( ( p[0] << 8 ) | p[1] );
-
- if( curve_info != NULL )
- {
- *curves++ = curve_info;
- our_size--;
- }
-
- list_size -= 2;
- p += 2;
- }
-
- return( 0 );
-}
-
-static int ssl_parse_supported_point_formats( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- size_t list_size;
- const unsigned char *p;
-
- if( len == 0 || (size_t)( buf[0] + 1 ) != len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- list_size = buf[0];
-
- p = buf + 1;
- while( list_size > 0 )
- {
- if( p[0] == MBEDTLS_ECP_PF_UNCOMPRESSED ||
- p[0] == MBEDTLS_ECP_PF_COMPRESSED )
- {
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
- ssl->handshake->ecdh_ctx.point_format = p[0];
-#endif
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- ssl->handshake->ecjpake_ctx.point_format = p[0];
-#endif
- MBEDTLS_SSL_DEBUG_MSG( 4, ( "point format selected: %d", p[0] ) );
- return( 0 );
- }
-
- list_size--;
- p++;
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
- MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static int ssl_parse_ecjpake_kkpp( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- if( mbedtls_ecjpake_check( &ssl->handshake->ecjpake_ctx ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip ecjpake kkpp extension" ) );
- return( 0 );
- }
-
- if( ( ret = mbedtls_ecjpake_read_round_one( &ssl->handshake->ecjpake_ctx,
- buf, len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_one", ret );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( ret );
- }
-
- /* Only mark the extension as OK when we're sure it is */
- ssl->handshake->cli_exts |= MBEDTLS_TLS_EXT_ECJPAKE_KKPP_OK;
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-static int ssl_parse_max_fragment_length_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( len != 1 || buf[0] >= MBEDTLS_SSL_MAX_FRAG_LEN_INVALID )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ssl->session_negotiate->mfl_code = buf[0];
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-static int ssl_parse_cid_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- size_t peer_cid_len;
-
- /* CID extension only makes sense in DTLS */
- if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /*
- * Quoting draft-ietf-tls-dtls-connection-id-05
- * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05
- *
- * struct {
- * opaque cid<0..2^8-1>;
- * } ConnectionId;
- */
-
- if( len < 1 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- peer_cid_len = *buf++;
- len--;
-
- if( len != peer_cid_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /* Ignore CID if the user has disabled its use. */
- if( ssl->negotiate_cid == MBEDTLS_SSL_CID_DISABLED )
- {
- /* Leave ssl->handshake->cid_in_use in its default
- * value of MBEDTLS_SSL_CID_DISABLED. */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Client sent CID extension, but CID disabled" ) );
- return( 0 );
- }
-
- if( peer_cid_len > MBEDTLS_SSL_CID_OUT_LEN_MAX )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ssl->handshake->cid_in_use = MBEDTLS_SSL_CID_ENABLED;
- ssl->handshake->peer_cid_len = (uint8_t) peer_cid_len;
- memcpy( ssl->handshake->peer_cid, buf, peer_cid_len );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Use of CID extension negotiated" ) );
- MBEDTLS_SSL_DEBUG_BUF( 3, "Client CID", buf, peer_cid_len );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-static int ssl_parse_truncated_hmac_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ((void) buf);
-
- if( ssl->conf->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_ENABLED )
- ssl->session_negotiate->trunc_hmac = MBEDTLS_SSL_TRUNC_HMAC_ENABLED;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-static int ssl_parse_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ((void) buf);
-
- if( ssl->conf->encrypt_then_mac == MBEDTLS_SSL_ETM_ENABLED &&
- ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- ssl->session_negotiate->encrypt_then_mac = MBEDTLS_SSL_ETM_ENABLED;
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
-static int ssl_parse_extended_ms_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf,
- size_t len )
-{
- if( len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ((void) buf);
-
- if( ssl->conf->extended_ms == MBEDTLS_SSL_EXTENDED_MS_ENABLED &&
- ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- ssl->handshake->extended_ms = MBEDTLS_SSL_EXTENDED_MS_ENABLED;
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-static int ssl_parse_session_ticket_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- mbedtls_ssl_session session;
-
- mbedtls_ssl_session_init( &session );
-
- if( ssl->conf->f_ticket_parse == NULL ||
- ssl->conf->f_ticket_write == NULL )
- {
- return( 0 );
- }
-
- /* Remember the client asked us to send a new ticket */
- ssl->handshake->new_session_ticket = 1;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket length: %d", len ) );
-
- if( len == 0 )
- return( 0 );
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket rejected: renegotiating" ) );
- return( 0 );
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
- /*
- * Failures are ok: just ignore the ticket and proceed.
- */
- if( ( ret = ssl->conf->f_ticket_parse( ssl->conf->p_ticket, &session,
- buf, len ) ) != 0 )
- {
- mbedtls_ssl_session_free( &session );
-
- if( ret == MBEDTLS_ERR_SSL_INVALID_MAC )
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket is not authentic" ) );
- else if( ret == MBEDTLS_ERR_SSL_SESSION_TICKET_EXPIRED )
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ticket is expired" ) );
- else
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_ticket_parse", ret );
-
- return( 0 );
- }
-
- /*
- * Keep the session ID sent by the client, since we MUST send it back to
- * inform them we're accepting the ticket (RFC 5077 section 3.4)
- */
- session.id_len = ssl->session_negotiate->id_len;
- memcpy( &session.id, ssl->session_negotiate->id, session.id_len );
-
- mbedtls_ssl_session_free( ssl->session_negotiate );
- memcpy( ssl->session_negotiate, &session, sizeof( mbedtls_ssl_session ) );
-
- /* Zeroize instead of free as we copied the content */
- mbedtls_platform_zeroize( &session, sizeof( mbedtls_ssl_session ) );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "session successfully restored from ticket" ) );
-
- ssl->handshake->resume = 1;
-
- /* Don't send a new ticket after all, this one is OK */
- ssl->handshake->new_session_ticket = 0;
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-#if defined(MBEDTLS_SSL_ALPN)
-static int ssl_parse_alpn_ext( mbedtls_ssl_context *ssl,
- const unsigned char *buf, size_t len )
-{
- size_t list_len, cur_len, ours_len;
- const unsigned char *theirs, *start, *end;
- const char **ours;
-
- /* If ALPN not configured, just ignore the extension */
- if( ssl->conf->alpn_list == NULL )
- return( 0 );
-
- /*
- * opaque ProtocolName<1..2^8-1>;
- *
- * struct {
- * ProtocolName protocol_name_list<2..2^16-1>
- * } ProtocolNameList;
- */
-
- /* Min length is 2 (list_len) + 1 (name_len) + 1 (name) */
- if( len < 4 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- list_len = ( buf[0] << 8 ) | buf[1];
- if( list_len != len - 2 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /*
- * Validate peer's list (lengths)
- */
- start = buf + 2;
- end = buf + len;
- for( theirs = start; theirs != end; theirs += cur_len )
- {
- cur_len = *theirs++;
-
- /* Current identifier must fit in list */
- if( cur_len > (size_t)( end - theirs ) )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /* Empty strings MUST NOT be included */
- if( cur_len == 0 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ILLEGAL_PARAMETER );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- }
-
- /*
- * Use our order of preference
- */
- for( ours = ssl->conf->alpn_list; *ours != NULL; ours++ )
- {
- ours_len = strlen( *ours );
- for( theirs = start; theirs != end; theirs += cur_len )
- {
- cur_len = *theirs++;
-
- if( cur_len == ours_len &&
- memcmp( theirs, *ours, cur_len ) == 0 )
- {
- ssl->alpn_chosen = *ours;
- return( 0 );
- }
- }
- }
-
- /* If we get there, no match was found */
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_NO_APPLICATION_PROTOCOL );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
-}
-#endif /* MBEDTLS_SSL_ALPN */
-
-/*
- * Auxiliary functions for ServerHello parsing and related actions
- */
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-/*
- * Return 0 if the given key uses one of the acceptable curves, -1 otherwise
- */
-#if defined(MBEDTLS_ECDSA_C)
-static int ssl_check_key_curve( mbedtls_pk_context *pk,
- const mbedtls_ecp_curve_info **curves )
-{
- const mbedtls_ecp_curve_info **crv = curves;
- mbedtls_ecp_group_id grp_id = mbedtls_pk_ec( *pk )->grp.id;
-
- while( *crv != NULL )
- {
- if( (*crv)->grp_id == grp_id )
- return( 0 );
- crv++;
- }
-
- return( -1 );
-}
-#endif /* MBEDTLS_ECDSA_C */
-
-/*
- * Try picking a certificate for this ciphersuite,
- * return 0 on success and -1 on failure.
- */
-static int ssl_pick_cert( mbedtls_ssl_context *ssl,
- const mbedtls_ssl_ciphersuite_t * ciphersuite_info )
-{
- mbedtls_ssl_key_cert *cur, *list, *fallback = NULL;
- mbedtls_pk_type_t pk_alg =
- mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
- uint32_t flags;
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- if( ssl->handshake->sni_key_cert != NULL )
- list = ssl->handshake->sni_key_cert;
- else
-#endif
- list = ssl->conf->key_cert;
-
- if( pk_alg == MBEDTLS_PK_NONE )
- return( 0 );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite requires certificate" ) );
-
- if( list == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server has no certificate" ) );
- return( -1 );
- }
-
- for( cur = list; cur != NULL; cur = cur->next )
- {
- MBEDTLS_SSL_DEBUG_CRT( 3, "candidate certificate chain, certificate",
- cur->cert );
-
- if( ! mbedtls_pk_can_do( &cur->cert->pk, pk_alg ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "certificate mismatch: key type" ) );
- continue;
- }
-
- /*
- * This avoids sending the client a cert it'll reject based on
- * keyUsage or other extensions.
- *
- * It also allows the user to provision different certificates for
- * different uses based on keyUsage, eg if they want to avoid signing
- * and decrypting with the same RSA key.
- */
- if( mbedtls_ssl_check_cert_usage( cur->cert, ciphersuite_info,
- MBEDTLS_SSL_IS_SERVER, &flags ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "certificate mismatch: "
- "(extended) key usage extension" ) );
- continue;
- }
-
-#if defined(MBEDTLS_ECDSA_C)
- if( pk_alg == MBEDTLS_PK_ECDSA &&
- ssl_check_key_curve( &cur->cert->pk, ssl->handshake->curves ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "certificate mismatch: elliptic curve" ) );
- continue;
- }
-#endif
-
- /*
- * Try to select a SHA-1 certificate for pre-1.2 clients, but still
- * present them a SHA-higher cert rather than failing if it's the only
- * one we got that satisfies the other conditions.
- */
- if( ssl->minor_ver < MBEDTLS_SSL_MINOR_VERSION_3 &&
- cur->cert->sig_md != MBEDTLS_MD_SHA1 )
- {
- if( fallback == NULL )
- fallback = cur;
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "certificate not preferred: "
- "sha-2 with pre-TLS 1.2 client" ) );
- continue;
- }
- }
-
- /* If we get there, we got a winner */
- break;
- }
-
- if( cur == NULL )
- cur = fallback;
-
- /* Do not update ssl->handshake->key_cert unless there is a match */
- if( cur != NULL )
- {
- ssl->handshake->key_cert = cur;
- MBEDTLS_SSL_DEBUG_CRT( 3, "selected certificate chain, certificate",
- ssl->handshake->key_cert->cert );
- return( 0 );
- }
-
- return( -1 );
-}
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
-
-/*
- * Check if a given ciphersuite is suitable for use with our config/keys/etc
- * Sets ciphersuite_info only if the suite matches.
- */
-static int ssl_ciphersuite_match( mbedtls_ssl_context *ssl, int suite_id,
- const mbedtls_ssl_ciphersuite_t **ciphersuite_info )
-{
- const mbedtls_ssl_ciphersuite_t *suite_info;
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- mbedtls_pk_type_t sig_type;
-#endif
-
- suite_info = mbedtls_ssl_ciphersuite_from_id( suite_id );
- if( suite_info == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "trying ciphersuite: %s", suite_info->name ) );
-
- if( suite_info->min_minor_ver > ssl->minor_ver ||
- suite_info->max_minor_ver < ssl->minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: version" ) );
- return( 0 );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ( suite_info->flags & MBEDTLS_CIPHERSUITE_NODTLS ) )
- return( 0 );
-#endif
-
-#if defined(MBEDTLS_ARC4_C)
- if( ssl->conf->arc4_disabled == MBEDTLS_SSL_ARC4_DISABLED &&
- suite_info->cipher == MBEDTLS_CIPHER_ARC4_128 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: rc4" ) );
- return( 0 );
- }
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( suite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE &&
- ( ssl->handshake->cli_exts & MBEDTLS_TLS_EXT_ECJPAKE_KKPP_OK ) == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: ecjpake "
- "not configured or ext missing" ) );
- return( 0 );
- }
-#endif
-
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
- if( mbedtls_ssl_ciphersuite_uses_ec( suite_info ) &&
- ( ssl->handshake->curves == NULL ||
- ssl->handshake->curves[0] == NULL ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: "
- "no common elliptic curve" ) );
- return( 0 );
- }
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
- /* If the ciphersuite requires a pre-shared key and we don't
- * have one, skip it now rather than failing later */
- if( mbedtls_ssl_ciphersuite_uses_psk( suite_info ) &&
- ssl_conf_has_psk_or_cb( ssl->conf ) == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: no pre-shared key" ) );
- return( 0 );
- }
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- /* If the ciphersuite requires signing, check whether
- * a suitable hash algorithm is present. */
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- sig_type = mbedtls_ssl_get_ciphersuite_sig_alg( suite_info );
- if( sig_type != MBEDTLS_PK_NONE &&
- mbedtls_ssl_sig_hash_set_find( &ssl->handshake->hash_algs, sig_type ) == MBEDTLS_MD_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: no suitable hash algorithm "
- "for signature algorithm %d", sig_type ) );
- return( 0 );
- }
- }
-
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
- MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
- /*
- * Final check: if ciphersuite requires us to have a
- * certificate/key of a particular type:
- * - select the appropriate certificate if we have one, or
- * - try the next ciphersuite if we don't
- * This must be done last since we modify the key_cert list.
- */
- if( ssl_pick_cert( ssl, suite_info ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciphersuite mismatch: "
- "no suitable certificate" ) );
- return( 0 );
- }
-#endif
-
- *ciphersuite_info = suite_info;
- return( 0 );
-}
-
-#if defined(MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO)
-static int ssl_parse_client_hello_v2( mbedtls_ssl_context *ssl )
-{
- int ret, got_common_suite;
- unsigned int i, j;
- size_t n;
- unsigned int ciph_len, sess_len, chal_len;
- unsigned char *buf, *p;
- const int *ciphersuites;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse client hello v2" ) );
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "client hello v2 illegal for renegotiation" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
- buf = ssl->in_hdr;
-
- MBEDTLS_SSL_DEBUG_BUF( 4, "record header", buf, 5 );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v2, message type: %d",
- buf[2] ) );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v2, message len.: %d",
- ( ( buf[0] & 0x7F ) << 8 ) | buf[1] ) );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v2, max. version: [%d:%d]",
- buf[3], buf[4] ) );
-
- /*
- * SSLv2 Client Hello
- *
- * Record layer:
- * 0 . 1 message length
- *
- * SSL layer:
- * 2 . 2 message type
- * 3 . 4 protocol version
- */
- if( buf[2] != MBEDTLS_SSL_HS_CLIENT_HELLO ||
- buf[3] != MBEDTLS_SSL_MAJOR_VERSION_3 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- n = ( ( buf[0] << 8 ) | buf[1] ) & 0x7FFF;
-
- if( n < 17 || n > 512 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ssl->major_ver = MBEDTLS_SSL_MAJOR_VERSION_3;
- ssl->minor_ver = ( buf[4] <= ssl->conf->max_minor_ver )
- ? buf[4] : ssl->conf->max_minor_ver;
-
- if( ssl->minor_ver < ssl->conf->min_minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "client only supports ssl smaller than minimum"
- " [%d:%d] < [%d:%d]",
- ssl->major_ver, ssl->minor_ver,
- ssl->conf->min_major_ver, ssl->conf->min_minor_ver ) );
-
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
- return( MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
- }
-
- ssl->handshake->max_major_ver = buf[3];
- ssl->handshake->max_minor_ver = buf[4];
-
- if( ( ret = mbedtls_ssl_fetch_input( ssl, 2 + n ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
- return( ret );
- }
-
- ssl->handshake->update_checksum( ssl, buf + 2, n );
-
- buf = ssl->in_msg;
- n = ssl->in_left - 5;
-
- /*
- * 0 . 1 ciphersuitelist length
- * 2 . 3 session id length
- * 4 . 5 challenge length
- * 6 . .. ciphersuitelist
- * .. . .. session id
- * .. . .. challenge
- */
- MBEDTLS_SSL_DEBUG_BUF( 4, "record contents", buf, n );
-
- ciph_len = ( buf[0] << 8 ) | buf[1];
- sess_len = ( buf[2] << 8 ) | buf[3];
- chal_len = ( buf[4] << 8 ) | buf[5];
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "ciph_len: %d, sess_len: %d, chal_len: %d",
- ciph_len, sess_len, chal_len ) );
-
- /*
- * Make sure each parameter length is valid
- */
- if( ciph_len < 3 || ( ciph_len % 3 ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- if( sess_len > 32 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- if( chal_len < 8 || chal_len > 32 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- if( n != 6 + ciph_len + sess_len + chal_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, ciphersuitelist",
- buf + 6, ciph_len );
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, session id",
- buf + 6 + ciph_len, sess_len );
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, challenge",
- buf + 6 + ciph_len + sess_len, chal_len );
-
- p = buf + 6 + ciph_len;
- ssl->session_negotiate->id_len = sess_len;
- memset( ssl->session_negotiate->id, 0,
- sizeof( ssl->session_negotiate->id ) );
- memcpy( ssl->session_negotiate->id, p, ssl->session_negotiate->id_len );
-
- p += sess_len;
- memset( ssl->handshake->randbytes, 0, 64 );
- memcpy( ssl->handshake->randbytes + 32 - chal_len, p, chal_len );
-
- /*
- * Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV
- */
- for( i = 0, p = buf + 6; i < ciph_len; i += 3, p += 3 )
- {
- if( p[0] == 0 && p[1] == 0 && p[2] == MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "received TLS_EMPTY_RENEGOTIATION_INFO " ) );
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "received RENEGOTIATION SCSV "
- "during renegotiation" ) );
-
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
- ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
- break;
- }
- }
-
-#if defined(MBEDTLS_SSL_FALLBACK_SCSV)
- for( i = 0, p = buf + 6; i < ciph_len; i += 3, p += 3 )
- {
- if( p[0] == 0 &&
- p[1] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE >> 8 ) & 0xff ) &&
- p[2] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE ) & 0xff ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "received FALLBACK_SCSV" ) );
-
- if( ssl->minor_ver < ssl->conf->max_minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "inapropriate fallback" ) );
-
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INAPROPRIATE_FALLBACK );
-
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- break;
- }
- }
-#endif /* MBEDTLS_SSL_FALLBACK_SCSV */
-
- got_common_suite = 0;
- ciphersuites = ssl->conf->ciphersuite_list[ssl->minor_ver];
- ciphersuite_info = NULL;
-#if defined(MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
- for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
- for( i = 0; ciphersuites[i] != 0; i++ )
-#else
- for( i = 0; ciphersuites[i] != 0; i++ )
- for( j = 0, p = buf + 6; j < ciph_len; j += 3, p += 3 )
-#endif
- {
- if( p[0] != 0 ||
- p[1] != ( ( ciphersuites[i] >> 8 ) & 0xFF ) ||
- p[2] != ( ( ciphersuites[i] ) & 0xFF ) )
- continue;
-
- got_common_suite = 1;
-
- if( ( ret = ssl_ciphersuite_match( ssl, ciphersuites[i],
- &ciphersuite_info ) ) != 0 )
- return( ret );
-
- if( ciphersuite_info != NULL )
- goto have_ciphersuite_v2;
- }
-
- if( got_common_suite )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got ciphersuites in common, "
- "but none of them usable" ) );
- return( MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE );
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no ciphersuites in common" ) );
- return( MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN );
- }
-
-have_ciphersuite_v2:
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "selected ciphersuite: %s", ciphersuite_info->name ) );
-
- ssl->session_negotiate->ciphersuite = ciphersuites[i];
- ssl->handshake->ciphersuite_info = ciphersuite_info;
-
- /*
- * SSLv2 Client Hello relevant renegotiation security checks
- */
- if( ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
- ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation, breaking off handshake" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ssl->in_left = 0;
- ssl->state++;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse client hello v2" ) );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO */
-
-/* This function doesn't alert on errors that happen early during
- ClientHello parsing because they might indicate that the client is
- not talking SSL/TLS at all and would not understand our alert. */
-static int ssl_parse_client_hello( mbedtls_ssl_context *ssl )
-{
- int ret, got_common_suite;
- size_t i, j;
- size_t ciph_offset, comp_offset, ext_offset;
- size_t msg_len, ciph_len, sess_len, comp_len, ext_len;
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- size_t cookie_offset, cookie_len;
-#endif
- unsigned char *buf, *p, *ext;
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- int renegotiation_info_seen = 0;
-#endif
- int handshake_failure = 0;
- const int *ciphersuites;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
- int major, minor;
-
- /* If there is no signature-algorithm extension present,
- * we need to fall back to the default values for allowed
- * signature-hash pairs. */
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- int sig_hash_alg_ext_present = 0;
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
- MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse client hello" ) );
-
-#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
-read_record_header:
-#endif
- /*
- * If renegotiating, then the input was read with mbedtls_ssl_read_record(),
- * otherwise read it ourselves manually in order to support SSLv2
- * ClientHello, which doesn't use the same record layer format.
- */
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE )
-#endif
- {
- if( ( ret = mbedtls_ssl_fetch_input( ssl, 5 ) ) != 0 )
- {
- /* No alert on a read error. */
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
- return( ret );
- }
- }
-
- buf = ssl->in_hdr;
-
-#if defined(MBEDTLS_SSL_SRV_SUPPORT_SSLV2_CLIENT_HELLO)
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_STREAM )
-#endif
- if( ( buf[0] & 0x80 ) != 0 )
- return( ssl_parse_client_hello_v2( ssl ) );
-#endif
-
- MBEDTLS_SSL_DEBUG_BUF( 4, "record header", buf, mbedtls_ssl_in_hdr_len( ssl ) );
-
- /*
- * SSLv3/TLS Client Hello
- *
- * Record layer:
- * 0 . 0 message type
- * 1 . 2 protocol version
- * 3 . 11 DTLS: epoch + record sequence number
- * 3 . 4 message length
- */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, message type: %d",
- buf[0] ) );
-
- if( buf[0] != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, message len.: %d",
- ( ssl->in_len[0] << 8 ) | ssl->in_len[1] ) );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, protocol version: [%d:%d]",
- buf[1], buf[2] ) );
-
- mbedtls_ssl_read_version( &major, &minor, ssl->conf->transport, buf + 1 );
-
- /* According to RFC 5246 Appendix E.1, the version here is typically
- * "{03,00}, the lowest version number supported by the client, [or] the
- * value of ClientHello.client_version", so the only meaningful check here
- * is the major version shouldn't be less than 3 */
- if( major < MBEDTLS_SSL_MAJOR_VERSION_3 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /* For DTLS if this is the initial handshake, remember the client sequence
- * number to use it in our next message (RFC 6347 4.2.1) */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- && ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE
-#endif
- )
- {
- /* Epoch should be 0 for initial handshakes */
- if( ssl->in_ctr[0] != 0 || ssl->in_ctr[1] != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- memcpy( ssl->cur_out_ctr + 2, ssl->in_ctr + 2, 6 );
-
-#if defined(MBEDTLS_SSL_DTLS_ANTI_REPLAY)
- if( mbedtls_ssl_dtls_replay_check( ssl ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "replayed record, discarding" ) );
- ssl->next_record_offset = 0;
- ssl->in_left = 0;
- goto read_record_header;
- }
-
- /* No MAC to check yet, so we can update right now */
- mbedtls_ssl_dtls_replay_update( ssl );
-#endif
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- msg_len = ( ssl->in_len[0] << 8 ) | ssl->in_len[1];
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- /* Set by mbedtls_ssl_read_record() */
- msg_len = ssl->in_hslen;
- }
- else
-#endif
- {
- if( msg_len > MBEDTLS_SSL_IN_CONTENT_LEN )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- if( ( ret = mbedtls_ssl_fetch_input( ssl,
- mbedtls_ssl_in_hdr_len( ssl ) + msg_len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_fetch_input", ret );
- return( ret );
- }
-
- /* Done reading this record, get ready for the next one */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- ssl->next_record_offset = msg_len + mbedtls_ssl_in_hdr_len( ssl );
- else
-#endif
- ssl->in_left = 0;
- }
-
- buf = ssl->in_msg;
-
- MBEDTLS_SSL_DEBUG_BUF( 4, "record contents", buf, msg_len );
-
- ssl->handshake->update_checksum( ssl, buf, msg_len );
-
- /*
- * Handshake layer:
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 5 DTLS only: message seqence number
- * 6 . 8 DTLS only: fragment offset
- * 9 . 11 DTLS only: fragment length
- */
- if( msg_len < mbedtls_ssl_hs_hdr_len( ssl ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, handshake type: %d", buf[0] ) );
-
- if( buf[0] != MBEDTLS_SSL_HS_CLIENT_HELLO )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, handshake len.: %d",
- ( buf[1] << 16 ) | ( buf[2] << 8 ) | buf[3] ) );
-
- /* We don't support fragmentation of ClientHello (yet?) */
- if( buf[1] != 0 ||
- msg_len != mbedtls_ssl_hs_hdr_len( ssl ) + ( ( buf[2] << 8 ) | buf[3] ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- {
- /*
- * Copy the client's handshake message_seq on initial handshakes,
- * check sequence number on renego.
- */
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
- {
- /* This couldn't be done in ssl_prepare_handshake_record() */
- unsigned int cli_msg_seq = ( ssl->in_msg[4] << 8 ) |
- ssl->in_msg[5];
-
- if( cli_msg_seq != ssl->handshake->in_msg_seq )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message_seq: "
- "%d (expected %d)", cli_msg_seq,
- ssl->handshake->in_msg_seq ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ssl->handshake->in_msg_seq++;
- }
- else
-#endif
- {
- unsigned int cli_msg_seq = ( ssl->in_msg[4] << 8 ) |
- ssl->in_msg[5];
- ssl->handshake->out_msg_seq = cli_msg_seq;
- ssl->handshake->in_msg_seq = cli_msg_seq + 1;
- }
-
- /*
- * For now we don't support fragmentation, so make sure
- * fragment_offset == 0 and fragment_length == length
- */
- if( ssl->in_msg[6] != 0 || ssl->in_msg[7] != 0 || ssl->in_msg[8] != 0 ||
- memcmp( ssl->in_msg + 1, ssl->in_msg + 9, 3 ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "ClientHello fragmentation not supported" ) );
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
- }
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- buf += mbedtls_ssl_hs_hdr_len( ssl );
- msg_len -= mbedtls_ssl_hs_hdr_len( ssl );
-
- /*
- * ClientHello layer:
- * 0 . 1 protocol version
- * 2 . 33 random bytes (starting with 4 bytes of Unix time)
- * 34 . 35 session id length (1 byte)
- * 35 . 34+x session id
- * 35+x . 35+x DTLS only: cookie length (1 byte)
- * 36+x . .. DTLS only: cookie
- * .. . .. ciphersuite list length (2 bytes)
- * .. . .. ciphersuite list
- * .. . .. compression alg. list length (1 byte)
- * .. . .. compression alg. list
- * .. . .. extensions length (2 bytes, optional)
- * .. . .. extensions (optional)
- */
-
- /*
- * Minimal length (with everything empty and extensions omitted) is
- * 2 + 32 + 1 + 2 + 1 = 38 bytes. Check that first, so that we can
- * read at least up to session id length without worrying.
- */
- if( msg_len < 38 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /*
- * Check and save the protocol version
- */
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, version", buf, 2 );
-
- mbedtls_ssl_read_version( &ssl->major_ver, &ssl->minor_ver,
- ssl->conf->transport, buf );
-
- ssl->handshake->max_major_ver = ssl->major_ver;
- ssl->handshake->max_minor_ver = ssl->minor_ver;
-
- if( ssl->major_ver < ssl->conf->min_major_ver ||
- ssl->minor_ver < ssl->conf->min_minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "client only supports ssl smaller than minimum"
- " [%d:%d] < [%d:%d]",
- ssl->major_ver, ssl->minor_ver,
- ssl->conf->min_major_ver, ssl->conf->min_minor_ver ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
- return( MBEDTLS_ERR_SSL_BAD_HS_PROTOCOL_VERSION );
- }
-
- if( ssl->major_ver > ssl->conf->max_major_ver )
- {
- ssl->major_ver = ssl->conf->max_major_ver;
- ssl->minor_ver = ssl->conf->max_minor_ver;
- }
- else if( ssl->minor_ver > ssl->conf->max_minor_ver )
- ssl->minor_ver = ssl->conf->max_minor_ver;
-
- /*
- * Save client random (inc. Unix time)
- */
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, random bytes", buf + 2, 32 );
-
- memcpy( ssl->handshake->randbytes, buf + 2, 32 );
-
- /*
- * Check the session ID length and save session ID
- */
- sess_len = buf[34];
-
- if( sess_len > sizeof( ssl->session_negotiate->id ) ||
- sess_len + 34 + 2 > msg_len ) /* 2 for cipherlist length field */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, session id", buf + 35, sess_len );
-
- ssl->session_negotiate->id_len = sess_len;
- memset( ssl->session_negotiate->id, 0,
- sizeof( ssl->session_negotiate->id ) );
- memcpy( ssl->session_negotiate->id, buf + 35,
- ssl->session_negotiate->id_len );
-
- /*
- * Check the cookie length and content
- */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- {
- cookie_offset = 35 + sess_len;
- cookie_len = buf[cookie_offset];
-
- if( cookie_offset + 1 + cookie_len + 2 > msg_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_PROTOCOL_VERSION );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, cookie",
- buf + cookie_offset + 1, cookie_len );
-
-#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
- if( ssl->conf->f_cookie_check != NULL
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- && ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE
-#endif
- )
- {
- if( ssl->conf->f_cookie_check( ssl->conf->p_cookie,
- buf + cookie_offset + 1, cookie_len,
- ssl->cli_id, ssl->cli_id_len ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "cookie verification failed" ) );
- ssl->handshake->verify_cookie_len = 1;
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "cookie verification passed" ) );
- ssl->handshake->verify_cookie_len = 0;
- }
- }
- else
-#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY */
- {
- /* We know we didn't send a cookie, so it should be empty */
- if( cookie_len != 0 )
- {
- /* This may be an attacker's probe, so don't send an alert */
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "cookie verification skipped" ) );
- }
-
- /*
- * Check the ciphersuitelist length (will be parsed later)
- */
- ciph_offset = cookie_offset + 1 + cookie_len;
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
- ciph_offset = 35 + sess_len;
-
- ciph_len = ( buf[ciph_offset + 0] << 8 )
- | ( buf[ciph_offset + 1] );
-
- if( ciph_len < 2 ||
- ciph_len + 2 + ciph_offset + 1 > msg_len || /* 1 for comp. alg. len */
- ( ciph_len % 2 ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, ciphersuitelist",
- buf + ciph_offset + 2, ciph_len );
-
- /*
- * Check the compression algorithms length and pick one
- */
- comp_offset = ciph_offset + 2 + ciph_len;
-
- comp_len = buf[comp_offset];
-
- if( comp_len < 1 ||
- comp_len > 16 ||
- comp_len + comp_offset + 1 > msg_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello, compression",
- buf + comp_offset + 1, comp_len );
-
- ssl->session_negotiate->compression = MBEDTLS_SSL_COMPRESS_NULL;
-#if defined(MBEDTLS_ZLIB_SUPPORT)
- for( i = 0; i < comp_len; ++i )
- {
- if( buf[comp_offset + 1 + i] == MBEDTLS_SSL_COMPRESS_DEFLATE )
- {
- ssl->session_negotiate->compression = MBEDTLS_SSL_COMPRESS_DEFLATE;
- break;
- }
- }
-#endif
-
- /* See comments in ssl_write_client_hello() */
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- ssl->session_negotiate->compression = MBEDTLS_SSL_COMPRESS_NULL;
-#endif
-
- /* Do not parse the extensions if the protocol is SSLv3 */
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- if( ( ssl->major_ver != 3 ) || ( ssl->minor_ver != 0 ) )
- {
-#endif
- /*
- * Check the extension length
- */
- ext_offset = comp_offset + 1 + comp_len;
- if( msg_len > ext_offset )
- {
- if( msg_len < ext_offset + 2 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- ext_len = ( buf[ext_offset + 0] << 8 )
- | ( buf[ext_offset + 1] );
-
- if( ( ext_len > 0 && ext_len < 4 ) ||
- msg_len != ext_offset + 2 + ext_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- }
- else
- ext_len = 0;
-
- ext = buf + ext_offset + 2;
- MBEDTLS_SSL_DEBUG_BUF( 3, "client hello extensions", ext, ext_len );
-
- while( ext_len != 0 )
- {
- unsigned int ext_id;
- unsigned int ext_size;
- if ( ext_len < 4 ) {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- ext_id = ( ( ext[0] << 8 ) | ( ext[1] ) );
- ext_size = ( ( ext[2] << 8 ) | ( ext[3] ) );
-
- if( ext_size + 4 > ext_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- switch( ext_id )
- {
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- case MBEDTLS_TLS_EXT_SERVERNAME:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found ServerName extension" ) );
- if( ssl->conf->f_sni == NULL )
- break;
-
- ret = ssl_parse_servername_ext( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_SSL_SERVER_NAME_INDICATION */
-
- case MBEDTLS_TLS_EXT_RENEGOTIATION_INFO:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found renegotiation extension" ) );
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- renegotiation_info_seen = 1;
-#endif
-
- ret = ssl_parse_renegotiation_info( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- case MBEDTLS_TLS_EXT_SIG_ALG:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found signature_algorithms extension" ) );
-
- ret = ssl_parse_signature_algorithms_ext( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
-
- sig_hash_alg_ext_present = 1;
- break;
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
- MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- case MBEDTLS_TLS_EXT_SUPPORTED_ELLIPTIC_CURVES:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found supported elliptic curves extension" ) );
-
- ret = ssl_parse_supported_elliptic_curves( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-
- case MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found supported point formats extension" ) );
- ssl->handshake->cli_exts |= MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS_PRESENT;
-
- ret = ssl_parse_supported_point_formats( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C ||
- MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- case MBEDTLS_TLS_EXT_ECJPAKE_KKPP:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found ecjpake kkpp extension" ) );
-
- ret = ssl_parse_ecjpake_kkpp( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
- case MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found max fragment length extension" ) );
-
- ret = ssl_parse_max_fragment_length_ext( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- case MBEDTLS_TLS_EXT_TRUNCATED_HMAC:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found truncated hmac extension" ) );
-
- ret = ssl_parse_truncated_hmac_ext( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
- case MBEDTLS_TLS_EXT_CID:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found CID extension" ) );
-
- ret = ssl_parse_cid_ext( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- case MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found encrypt then mac extension" ) );
-
- ret = ssl_parse_encrypt_then_mac_ext( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
- case MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found extended master secret extension" ) );
-
- ret = ssl_parse_extended_ms_ext( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- case MBEDTLS_TLS_EXT_SESSION_TICKET:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found session ticket extension" ) );
-
- ret = ssl_parse_session_ticket_ext( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-#if defined(MBEDTLS_SSL_ALPN)
- case MBEDTLS_TLS_EXT_ALPN:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "found alpn extension" ) );
-
- ret = ssl_parse_alpn_ext( ssl, ext + 4, ext_size );
- if( ret != 0 )
- return( ret );
- break;
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
- default:
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "unknown extension found: %d (ignoring)",
- ext_id ) );
- }
-
- ext_len -= 4 + ext_size;
- ext += 4 + ext_size;
-
- if( ext_len > 0 && ext_len < 4 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client hello message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
- }
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- }
-#endif
-
-#if defined(MBEDTLS_SSL_FALLBACK_SCSV)
- for( i = 0, p = buf + ciph_offset + 2; i < ciph_len; i += 2, p += 2 )
- {
- if( p[0] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE >> 8 ) & 0xff ) &&
- p[1] == (unsigned char)( ( MBEDTLS_SSL_FALLBACK_SCSV_VALUE ) & 0xff ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "received FALLBACK_SCSV" ) );
-
- if( ssl->minor_ver < ssl->conf->max_minor_ver )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "inapropriate fallback" ) );
-
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INAPROPRIATE_FALLBACK );
-
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- break;
- }
- }
-#endif /* MBEDTLS_SSL_FALLBACK_SCSV */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-
- /*
- * Try to fall back to default hash SHA1 if the client
- * hasn't provided any preferred signature-hash combinations.
- */
- if( sig_hash_alg_ext_present == 0 )
- {
- mbedtls_md_type_t md_default = MBEDTLS_MD_SHA1;
-
- if( mbedtls_ssl_check_sig_hash( ssl, md_default ) != 0 )
- md_default = MBEDTLS_MD_NONE;
-
- mbedtls_ssl_sig_hash_set_const_hash( &ssl->handshake->hash_algs, md_default );
- }
-
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 &&
- MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-
- /*
- * Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV
- */
- for( i = 0, p = buf + ciph_offset + 2; i < ciph_len; i += 2, p += 2 )
- {
- if( p[0] == 0 && p[1] == MBEDTLS_SSL_EMPTY_RENEGOTIATION_INFO )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "received TLS_EMPTY_RENEGOTIATION_INFO " ) );
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "received RENEGOTIATION SCSV "
- "during renegotiation" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-#endif
- ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
- break;
- }
- }
-
- /*
- * Renegotiation security checks
- */
- if( ssl->secure_renegotiation != MBEDTLS_SSL_SECURE_RENEGOTIATION &&
- ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_BREAK_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation, breaking off handshake" ) );
- handshake_failure = 1;
- }
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
- ssl->secure_renegotiation == MBEDTLS_SSL_SECURE_RENEGOTIATION &&
- renegotiation_info_seen == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation_info extension missing (secure)" ) );
- handshake_failure = 1;
- }
- else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
- ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
- ssl->conf->allow_legacy_renegotiation == MBEDTLS_SSL_LEGACY_NO_RENEGOTIATION )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "legacy renegotiation not allowed" ) );
- handshake_failure = 1;
- }
- else if( ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS &&
- ssl->secure_renegotiation == MBEDTLS_SSL_LEGACY_RENEGOTIATION &&
- renegotiation_info_seen == 1 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "renegotiation_info extension present (legacy)" ) );
- handshake_failure = 1;
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
-
- if( handshake_failure == 1 )
- {
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
- }
-
- /*
- * Search for a matching ciphersuite
- * (At the end because we need information from the EC-based extensions
- * and certificate from the SNI callback triggered by the SNI extension.)
- */
- got_common_suite = 0;
- ciphersuites = ssl->conf->ciphersuite_list[ssl->minor_ver];
- ciphersuite_info = NULL;
-#if defined(MBEDTLS_SSL_SRV_RESPECT_CLIENT_PREFERENCE)
- for( j = 0, p = buf + ciph_offset + 2; j < ciph_len; j += 2, p += 2 )
- for( i = 0; ciphersuites[i] != 0; i++ )
-#else
- for( i = 0; ciphersuites[i] != 0; i++ )
- for( j = 0, p = buf + ciph_offset + 2; j < ciph_len; j += 2, p += 2 )
-#endif
- {
- if( p[0] != ( ( ciphersuites[i] >> 8 ) & 0xFF ) ||
- p[1] != ( ( ciphersuites[i] ) & 0xFF ) )
- continue;
-
- got_common_suite = 1;
-
- if( ( ret = ssl_ciphersuite_match( ssl, ciphersuites[i],
- &ciphersuite_info ) ) != 0 )
- return( ret );
-
- if( ciphersuite_info != NULL )
- goto have_ciphersuite;
- }
-
- if( got_common_suite )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got ciphersuites in common, "
- "but none of them usable" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_NO_USABLE_CIPHERSUITE );
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no ciphersuites in common" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
- return( MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN );
- }
-
-have_ciphersuite:
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "selected ciphersuite: %s", ciphersuite_info->name ) );
-
- ssl->session_negotiate->ciphersuite = ciphersuites[i];
- ssl->handshake->ciphersuite_info = ciphersuite_info;
-
- ssl->state++;
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- mbedtls_ssl_recv_flight_completed( ssl );
-#endif
-
- /* Debugging-only output for testsuite */
-#if defined(MBEDTLS_DEBUG_C) && \
- defined(MBEDTLS_SSL_PROTO_TLS1_2) && \
- defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- mbedtls_pk_type_t sig_alg = mbedtls_ssl_get_ciphersuite_sig_alg( ciphersuite_info );
- if( sig_alg != MBEDTLS_PK_NONE )
- {
- mbedtls_md_type_t md_alg = mbedtls_ssl_sig_hash_set_find( &ssl->handshake->hash_algs,
- sig_alg );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "client hello v3, signature_algorithm ext: %d",
- mbedtls_ssl_hash_from_md_alg( md_alg ) ) );
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "no hash algorithm for signature algorithm "
- "%d - should not happen", sig_alg ) );
- }
- }
-#endif
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse client hello" ) );
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
-static void ssl_write_truncated_hmac_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->session_negotiate->trunc_hmac == MBEDTLS_SSL_TRUNC_HMAC_DISABLED )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding truncated hmac extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_TRUNCATED_HMAC ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
-static void ssl_write_cid_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- size_t ext_len;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
-
- *olen = 0;
-
- /* Skip writing the extension if we don't want to use it or if
- * the client hasn't offered it. */
- if( ssl->handshake->cid_in_use == MBEDTLS_SSL_CID_DISABLED )
- return;
-
- /* ssl->own_cid_len is at most MBEDTLS_SSL_CID_IN_LEN_MAX
- * which is at most 255, so the increment cannot overflow. */
- if( end < p || (size_t)( end - p ) < (unsigned)( ssl->own_cid_len + 5 ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding CID extension" ) );
-
- /*
- * Quoting draft-ietf-tls-dtls-connection-id-05
- * https://tools.ietf.org/html/draft-ietf-tls-dtls-connection-id-05
- *
- * struct {
- * opaque cid<0..2^8-1>;
- * } ConnectionId;
- */
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_CID >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_CID ) & 0xFF );
- ext_len = (size_t) ssl->own_cid_len + 1;
- *p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ext_len ) & 0xFF );
-
- *p++ = (uint8_t) ssl->own_cid_len;
- memcpy( p, ssl->own_cid, ssl->own_cid_len );
-
- *olen = ssl->own_cid_len + 5;
-}
-#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
-static void ssl_write_encrypt_then_mac_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- const mbedtls_ssl_ciphersuite_t *suite = NULL;
- const mbedtls_cipher_info_t *cipher = NULL;
-
- if( ssl->session_negotiate->encrypt_then_mac == MBEDTLS_SSL_ETM_DISABLED ||
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- *olen = 0;
- return;
- }
-
- /*
- * RFC 7366: "If a server receives an encrypt-then-MAC request extension
- * from a client and then selects a stream or Authenticated Encryption
- * with Associated Data (AEAD) ciphersuite, it MUST NOT send an
- * encrypt-then-MAC response extension back to the client."
- */
- if( ( suite = mbedtls_ssl_ciphersuite_from_id(
- ssl->session_negotiate->ciphersuite ) ) == NULL ||
- ( cipher = mbedtls_cipher_info_from_type( suite->cipher ) ) == NULL ||
- cipher->mode != MBEDTLS_MODE_CBC )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding encrypt then mac extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ENCRYPT_THEN_MAC ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_ENCRYPT_THEN_MAC */
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
-static void ssl_write_extended_ms_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->handshake->extended_ms == MBEDTLS_SSL_EXTENDED_MS_DISABLED ||
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding extended master secret "
- "extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_EXTENDED_MASTER_SECRET ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_EXTENDED_MASTER_SECRET */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-static void ssl_write_session_ticket_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->handshake->new_session_ticket == 0 )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding session ticket extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SESSION_TICKET ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 0x00;
-
- *olen = 4;
-}
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-static void ssl_write_renegotiation_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->secure_renegotiation != MBEDTLS_SSL_SECURE_RENEGOTIATION )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, secure renegotiation extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_RENEGOTIATION_INFO ) & 0xFF );
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
- {
- *p++ = 0x00;
- *p++ = ( ssl->verify_data_len * 2 + 1 ) & 0xFF;
- *p++ = ssl->verify_data_len * 2 & 0xFF;
-
- memcpy( p, ssl->peer_verify_data, ssl->verify_data_len );
- p += ssl->verify_data_len;
- memcpy( p, ssl->own_verify_data, ssl->verify_data_len );
- p += ssl->verify_data_len;
- }
- else
-#endif /* MBEDTLS_SSL_RENEGOTIATION */
- {
- *p++ = 0x00;
- *p++ = 0x01;
- *p++ = 0x00;
- }
-
- *olen = p - buf;
-}
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
-static void ssl_write_max_fragment_length_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
-
- if( ssl->session_negotiate->mfl_code == MBEDTLS_SSL_MAX_FRAG_LEN_NONE )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, max_fragment_length extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_MAX_FRAGMENT_LENGTH ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 1;
-
- *p++ = ssl->session_negotiate->mfl_code;
-
- *olen = 5;
-}
-#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static void ssl_write_supported_point_formats_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- unsigned char *p = buf;
- ((void) ssl);
-
- if( ( ssl->handshake->cli_exts &
- MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS_PRESENT ) == 0 )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, supported_point_formats extension" ) );
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_SUPPORTED_POINT_FORMATS ) & 0xFF );
-
- *p++ = 0x00;
- *p++ = 2;
-
- *p++ = 1;
- *p++ = MBEDTLS_ECP_PF_UNCOMPRESSED;
-
- *olen = 6;
-}
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C || MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
-static void ssl_write_ecjpake_kkpp_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf,
- size_t *olen )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char *p = buf;
- const unsigned char *end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- size_t kkpp_len;
-
- *olen = 0;
-
- /* Skip costly computation if not needed */
- if( ssl->handshake->ciphersuite_info->key_exchange !=
- MBEDTLS_KEY_EXCHANGE_ECJPAKE )
- return;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, ecjpake kkpp extension" ) );
-
- if( end - p < 4 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "buffer too small" ) );
- return;
- }
-
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( MBEDTLS_TLS_EXT_ECJPAKE_KKPP ) & 0xFF );
-
- ret = mbedtls_ecjpake_write_round_one( &ssl->handshake->ecjpake_ctx,
- p + 2, end - p - 2, &kkpp_len,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1 , "mbedtls_ecjpake_write_round_one", ret );
- return;
- }
-
- *p++ = (unsigned char)( ( kkpp_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( kkpp_len ) & 0xFF );
-
- *olen = kkpp_len + 4;
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
-#if defined(MBEDTLS_SSL_ALPN )
-static void ssl_write_alpn_ext( mbedtls_ssl_context *ssl,
- unsigned char *buf, size_t *olen )
-{
- if( ssl->alpn_chosen == NULL )
- {
- *olen = 0;
- return;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, adding alpn extension" ) );
-
- /*
- * 0 . 1 ext identifier
- * 2 . 3 ext length
- * 4 . 5 protocol list length
- * 6 . 6 protocol name length
- * 7 . 7+n protocol name
- */
- buf[0] = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN >> 8 ) & 0xFF );
- buf[1] = (unsigned char)( ( MBEDTLS_TLS_EXT_ALPN ) & 0xFF );
-
- *olen = 7 + strlen( ssl->alpn_chosen );
-
- buf[2] = (unsigned char)( ( ( *olen - 4 ) >> 8 ) & 0xFF );
- buf[3] = (unsigned char)( ( ( *olen - 4 ) ) & 0xFF );
-
- buf[4] = (unsigned char)( ( ( *olen - 6 ) >> 8 ) & 0xFF );
- buf[5] = (unsigned char)( ( ( *olen - 6 ) ) & 0xFF );
-
- buf[6] = (unsigned char)( ( ( *olen - 7 ) ) & 0xFF );
-
- memcpy( buf + 7, ssl->alpn_chosen, *olen - 7 );
-}
-#endif /* MBEDTLS_ECDH_C || MBEDTLS_ECDSA_C */
-
-#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
-static int ssl_write_hello_verify_request( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char *p = ssl->out_msg + 4;
- unsigned char *cookie_len_byte;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write hello verify request" ) );
-
- /*
- * struct {
- * ProtocolVersion server_version;
- * opaque cookie<0..2^8-1>;
- * } HelloVerifyRequest;
- */
-
- /* The RFC is not clear on this point, but sending the actual negotiated
- * version looks like the most interoperable thing to do. */
- mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
- ssl->conf->transport, p );
- MBEDTLS_SSL_DEBUG_BUF( 3, "server version", p, 2 );
- p += 2;
-
- /* If we get here, f_cookie_check is not null */
- if( ssl->conf->f_cookie_write == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "inconsistent cookie callbacks" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- /* Skip length byte until we know the length */
- cookie_len_byte = p++;
-
- if( ( ret = ssl->conf->f_cookie_write( ssl->conf->p_cookie,
- &p, ssl->out_buf + MBEDTLS_SSL_OUT_BUFFER_LEN,
- ssl->cli_id, ssl->cli_id_len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "f_cookie_write", ret );
- return( ret );
- }
-
- *cookie_len_byte = (unsigned char)( p - ( cookie_len_byte + 1 ) );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "cookie sent", cookie_len_byte + 1, *cookie_len_byte );
-
- ssl->out_msglen = p - ssl->out_msg;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_HELLO_VERIFY_REQUEST;
-
- ssl->state = MBEDTLS_SSL_SERVER_HELLO_VERIFY_REQUEST_SENT;
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret );
- return( ret );
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write hello verify request" ) );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY */
-
-static int ssl_write_server_hello( mbedtls_ssl_context *ssl )
-{
-#if defined(MBEDTLS_HAVE_TIME)
- mbedtls_time_t t;
-#endif
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t olen, ext_len = 0, n;
- unsigned char *buf, *p;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write server hello" ) );
-
-#if defined(MBEDTLS_SSL_DTLS_HELLO_VERIFY)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ssl->handshake->verify_cookie_len != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "client hello was not authenticated" ) );
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server hello" ) );
-
- return( ssl_write_hello_verify_request( ssl ) );
- }
-#endif /* MBEDTLS_SSL_DTLS_HELLO_VERIFY */
-
- if( ssl->conf->f_rng == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "no RNG provided") );
- return( MBEDTLS_ERR_SSL_NO_RNG );
- }
-
- /*
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 5 protocol version
- * 6 . 9 UNIX time()
- * 10 . 37 random bytes
- */
- buf = ssl->out_msg;
- p = buf + 4;
-
- mbedtls_ssl_write_version( ssl->major_ver, ssl->minor_ver,
- ssl->conf->transport, p );
- p += 2;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, chosen version: [%d:%d]",
- buf[4], buf[5] ) );
-
-#if defined(MBEDTLS_HAVE_TIME)
- t = mbedtls_time( NULL );
- *p++ = (unsigned char)( t >> 24 );
- *p++ = (unsigned char)( t >> 16 );
- *p++ = (unsigned char)( t >> 8 );
- *p++ = (unsigned char)( t );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, current time: %lu", t ) );
-#else
- if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 4 ) ) != 0 )
- return( ret );
-
- p += 4;
-#endif /* MBEDTLS_HAVE_TIME */
-
- if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, p, 28 ) ) != 0 )
- return( ret );
-
- p += 28;
-
- memcpy( ssl->handshake->randbytes + 32, buf + 6, 32 );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, random bytes", buf + 6, 32 );
-
- /*
- * Resume is 0 by default, see ssl_handshake_init().
- * It may be already set to 1 by ssl_parse_session_ticket_ext().
- * If not, try looking up session ID in our cache.
- */
- if( ssl->handshake->resume == 0 &&
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- ssl->renego_status == MBEDTLS_SSL_INITIAL_HANDSHAKE &&
-#endif
- ssl->session_negotiate->id_len != 0 &&
- ssl->conf->f_get_cache != NULL &&
- ssl->conf->f_get_cache( ssl->conf->p_cache, ssl->session_negotiate ) == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "session successfully restored from cache" ) );
- ssl->handshake->resume = 1;
- }
-
- if( ssl->handshake->resume == 0 )
- {
- /*
- * New session, create a new session id,
- * unless we're about to issue a session ticket
- */
- ssl->state++;
-
-#if defined(MBEDTLS_HAVE_TIME)
- ssl->session_negotiate->start = mbedtls_time( NULL );
-#endif
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- if( ssl->handshake->new_session_ticket != 0 )
- {
- ssl->session_negotiate->id_len = n = 0;
- memset( ssl->session_negotiate->id, 0, 32 );
- }
- else
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
- {
- ssl->session_negotiate->id_len = n = 32;
- if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng, ssl->session_negotiate->id,
- n ) ) != 0 )
- return( ret );
- }
- }
- else
- {
- /*
- * Resuming a session
- */
- n = ssl->session_negotiate->id_len;
- ssl->state = MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC;
-
- if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
- return( ret );
- }
- }
-
- /*
- * 38 . 38 session id length
- * 39 . 38+n session id
- * 39+n . 40+n chosen ciphersuite
- * 41+n . 41+n chosen compression alg.
- * 42+n . 43+n extensions length
- * 44+n . 43+n+m extensions
- */
- *p++ = (unsigned char) ssl->session_negotiate->id_len;
- memcpy( p, ssl->session_negotiate->id, ssl->session_negotiate->id_len );
- p += ssl->session_negotiate->id_len;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, session id len.: %d", n ) );
- MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, session id", buf + 39, n );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "%s session has been resumed",
- ssl->handshake->resume ? "a" : "no" ) );
-
- *p++ = (unsigned char)( ssl->session_negotiate->ciphersuite >> 8 );
- *p++ = (unsigned char)( ssl->session_negotiate->ciphersuite );
- *p++ = (unsigned char)( ssl->session_negotiate->compression );
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, chosen ciphersuite: %s",
- mbedtls_ssl_get_ciphersuite_name( ssl->session_negotiate->ciphersuite ) ) );
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, compress alg.: 0x%02X",
- ssl->session_negotiate->compression ) );
-
- /* Do not write the extensions if the protocol is SSLv3 */
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- if( ( ssl->major_ver != 3 ) || ( ssl->minor_ver != 0 ) )
- {
-#endif
-
- /*
- * First write extensions, then the total length
- */
- ssl_write_renegotiation_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-
-#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
- ssl_write_max_fragment_length_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
- ssl_write_truncated_hmac_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
- ssl_write_cid_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_ENCRYPT_THEN_MAC)
- ssl_write_encrypt_then_mac_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_EXTENDED_MASTER_SECRET)
- ssl_write_extended_ms_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- ssl_write_session_ticket_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if ( mbedtls_ssl_ciphersuite_uses_ec(
- mbedtls_ssl_ciphersuite_from_id( ssl->session_negotiate->ciphersuite ) ) )
- {
- ssl_write_supported_point_formats_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
- }
-#endif
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- ssl_write_ecjpake_kkpp_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
-#if defined(MBEDTLS_SSL_ALPN)
- ssl_write_alpn_ext( ssl, p + 2 + ext_len, &olen );
- ext_len += olen;
-#endif
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "server hello, total extension length: %d", ext_len ) );
-
- if( ext_len > 0 )
- {
- *p++ = (unsigned char)( ( ext_len >> 8 ) & 0xFF );
- *p++ = (unsigned char)( ( ext_len ) & 0xFF );
- p += ext_len;
- }
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- }
-#endif
-
- ssl->out_msglen = p - buf;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_SERVER_HELLO;
-
- ret = mbedtls_ssl_write_handshake_msg( ssl );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server hello" ) );
-
- return( ret );
-}
-
-#if !defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
-static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate request" ) );
-
- if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate request" ) );
- ssl->state++;
- return( 0 );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-}
-#else /* !MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
-static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
- size_t dn_size, total_dn_size; /* excluding length bytes */
- size_t ct_len, sa_len; /* including length bytes */
- unsigned char *buf, *p;
- const unsigned char * const end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
- const mbedtls_x509_crt *crt;
- int authmode;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate request" ) );
-
- ssl->state++;
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- if( ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET )
- authmode = ssl->handshake->sni_authmode;
- else
-#endif
- authmode = ssl->conf->authmode;
-
- if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) ||
- authmode == MBEDTLS_SSL_VERIFY_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate request" ) );
- return( 0 );
- }
-
- /*
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 4 cert type count
- * 5 .. m-1 cert types
- * m .. m+1 sig alg length (TLS 1.2 only)
- * m+1 .. n-1 SignatureAndHashAlgorithms (TLS 1.2 only)
- * n .. n+1 length of all DNs
- * n+2 .. n+3 length of DN 1
- * n+4 .. ... Distinguished Name #1
- * ... .. ... length of DN 2, etc.
- */
- buf = ssl->out_msg;
- p = buf + 4;
-
- /*
- * Supported certificate types
- *
- * ClientCertificateType certificate_types<1..2^8-1>;
- * enum { (255) } ClientCertificateType;
- */
- ct_len = 0;
-
-#if defined(MBEDTLS_RSA_C)
- p[1 + ct_len++] = MBEDTLS_SSL_CERT_TYPE_RSA_SIGN;
-#endif
-#if defined(MBEDTLS_ECDSA_C)
- p[1 + ct_len++] = MBEDTLS_SSL_CERT_TYPE_ECDSA_SIGN;
-#endif
-
- p[0] = (unsigned char) ct_len++;
- p += ct_len;
-
- sa_len = 0;
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- /*
- * Add signature_algorithms for verify (TLS 1.2)
- *
- * SignatureAndHashAlgorithm supported_signature_algorithms<2..2^16-2>;
- *
- * struct {
- * HashAlgorithm hash;
- * SignatureAlgorithm signature;
- * } SignatureAndHashAlgorithm;
- *
- * enum { (255) } HashAlgorithm;
- * enum { (255) } SignatureAlgorithm;
- */
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- const int *cur;
-
- /*
- * Supported signature algorithms
- */
- for( cur = ssl->conf->sig_hashes; *cur != MBEDTLS_MD_NONE; cur++ )
- {
- unsigned char hash = mbedtls_ssl_hash_from_md_alg( *cur );
-
- if( MBEDTLS_SSL_HASH_NONE == hash || mbedtls_ssl_set_calc_verify_md( ssl, hash ) )
- continue;
-
-#if defined(MBEDTLS_RSA_C)
- p[2 + sa_len++] = hash;
- p[2 + sa_len++] = MBEDTLS_SSL_SIG_RSA;
-#endif
-#if defined(MBEDTLS_ECDSA_C)
- p[2 + sa_len++] = hash;
- p[2 + sa_len++] = MBEDTLS_SSL_SIG_ECDSA;
-#endif
- }
-
- p[0] = (unsigned char)( sa_len >> 8 );
- p[1] = (unsigned char)( sa_len );
- sa_len += 2;
- p += sa_len;
- }
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
- /*
- * DistinguishedName certificate_authorities<0..2^16-1>;
- * opaque DistinguishedName<1..2^16-1>;
- */
- p += 2;
-
- total_dn_size = 0;
-
- if( ssl->conf->cert_req_ca_list == MBEDTLS_SSL_CERT_REQ_CA_LIST_ENABLED )
- {
- /* NOTE: If trusted certificates are provisioned
- * via a CA callback (configured through
- * `mbedtls_ssl_conf_ca_cb()`, then the
- * CertificateRequest is currently left empty. */
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- if( ssl->handshake->sni_ca_chain != NULL )
- crt = ssl->handshake->sni_ca_chain;
- else
-#endif
- crt = ssl->conf->ca_chain;
-
- while( crt != NULL && crt->version != 0 )
- {
- dn_size = crt->subject_raw.len;
-
- if( end < p ||
- (size_t)( end - p ) < dn_size ||
- (size_t)( end - p ) < 2 + dn_size )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "skipping CAs: buffer too short" ) );
- break;
- }
-
- *p++ = (unsigned char)( dn_size >> 8 );
- *p++ = (unsigned char)( dn_size );
- memcpy( p, crt->subject_raw.p, dn_size );
- p += dn_size;
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "requested DN", p - dn_size, dn_size );
-
- total_dn_size += 2 + dn_size;
- crt = crt->next;
- }
- }
-
- ssl->out_msglen = p - buf;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE_REQUEST;
- ssl->out_msg[4 + ct_len + sa_len] = (unsigned char)( total_dn_size >> 8 );
- ssl->out_msg[5 + ct_len + sa_len] = (unsigned char)( total_dn_size );
-
- ret = mbedtls_ssl_write_handshake_msg( ssl );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate request" ) );
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
-static int ssl_get_ecdh_params_from_cert( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- if( ! mbedtls_pk_can_do( mbedtls_ssl_own_key( ssl ), MBEDTLS_PK_ECKEY ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "server key not ECDH capable" ) );
- return( MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH );
- }
-
- if( ( ret = mbedtls_ecdh_get_params( &ssl->handshake->ecdh_ctx,
- mbedtls_pk_ec( *mbedtls_ssl_own_key( ssl ) ),
- MBEDTLS_ECDH_OURS ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ecdh_get_params" ), ret );
- return( ret );
- }
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) ||
- MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) && \
- defined(MBEDTLS_SSL_ASYNC_PRIVATE)
-static int ssl_resume_server_key_exchange( mbedtls_ssl_context *ssl,
- size_t *signature_len )
-{
- /* Append the signature to ssl->out_msg, leaving 2 bytes for the
- * signature length which will be added in ssl_write_server_key_exchange
- * after the call to ssl_prepare_server_key_exchange.
- * ssl_write_server_key_exchange also takes care of incrementing
- * ssl->out_msglen. */
- unsigned char *sig_start = ssl->out_msg + ssl->out_msglen + 2;
- size_t sig_max_len = ( ssl->out_buf + MBEDTLS_SSL_OUT_CONTENT_LEN
- - sig_start );
- int ret = ssl->conf->f_async_resume( ssl,
- sig_start, signature_len, sig_max_len );
- if( ret != MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS )
- {
- ssl->handshake->async_in_progress = 0;
- mbedtls_ssl_set_async_operation_data( ssl, NULL );
- }
- MBEDTLS_SSL_DEBUG_RET( 2, "ssl_resume_server_key_exchange", ret );
- return( ret );
-}
-#endif /* defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) &&
- defined(MBEDTLS_SSL_ASYNC_PRIVATE) */
-
-/* Prepare the ServerKeyExchange message, up to and including
- * calculating the signature if any, but excluding formatting the
- * signature and sending the message. */
-static int ssl_prepare_server_key_exchange( mbedtls_ssl_context *ssl,
- size_t *signature_len )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME_PFS__ENABLED)
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
- unsigned char *dig_signed = NULL;
-#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME_PFS__ENABLED */
-
- (void) ciphersuite_info; /* unused in some configurations */
-#if !defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
- (void) signature_len;
-#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
-
- ssl->out_msglen = 4; /* header (type:1, length:3) to be written later */
-
- /*
- *
- * Part 1: Provide key exchange parameters for chosen ciphersuite.
- *
- */
-
- /*
- * - ECJPAKE key exchanges
- */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
- {
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t len = 0;
-
- ret = mbedtls_ecjpake_write_round_two(
- &ssl->handshake->ecjpake_ctx,
- ssl->out_msg + ssl->out_msglen,
- MBEDTLS_SSL_OUT_CONTENT_LEN - ssl->out_msglen, &len,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_write_round_two", ret );
- return( ret );
- }
-
- ssl->out_msglen += len;
- }
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
-
- /*
- * For (EC)DHE key exchanges with PSK, parameters are prefixed by support
- * identity hint (RFC 4279, Sec. 3). Until someone needs this feature,
- * we use empty support identity hints here.
- **/
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
- {
- ssl->out_msg[ssl->out_msglen++] = 0x00;
- ssl->out_msg[ssl->out_msglen++] = 0x00;
- }
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
-
- /*
- * - DHE key exchanges
- */
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__DHE_ENABLED)
- if( mbedtls_ssl_ciphersuite_uses_dhe( ciphersuite_info ) )
- {
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t len = 0;
-
- if( ssl->conf->dhm_P.p == NULL || ssl->conf->dhm_G.p == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "no DH parameters set" ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- /*
- * Ephemeral DH parameters:
- *
- * struct {
- * opaque dh_p<1..2^16-1>;
- * opaque dh_g<1..2^16-1>;
- * opaque dh_Ys<1..2^16-1>;
- * } ServerDHParams;
- */
- if( ( ret = mbedtls_dhm_set_group( &ssl->handshake->dhm_ctx,
- &ssl->conf->dhm_P,
- &ssl->conf->dhm_G ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_set_group", ret );
- return( ret );
- }
-
- if( ( ret = mbedtls_dhm_make_params(
- &ssl->handshake->dhm_ctx,
- (int) mbedtls_mpi_size( &ssl->handshake->dhm_ctx.P ),
- ssl->out_msg + ssl->out_msglen, &len,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_make_params", ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
- dig_signed = ssl->out_msg + ssl->out_msglen;
-#endif
-
- ssl->out_msglen += len;
-
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: X ", &ssl->handshake->dhm_ctx.X );
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: P ", &ssl->handshake->dhm_ctx.P );
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: G ", &ssl->handshake->dhm_ctx.G );
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: GX", &ssl->handshake->dhm_ctx.GX );
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__DHE_ENABLED */
-
- /*
- * - ECDHE key exchanges
- */
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__ECDHE_ENABLED)
- if( mbedtls_ssl_ciphersuite_uses_ecdhe( ciphersuite_info ) )
- {
- /*
- * Ephemeral ECDH parameters:
- *
- * struct {
- * ECParameters curve_params;
- * ECPoint public;
- * } ServerECDHParams;
- */
- const mbedtls_ecp_curve_info **curve = NULL;
- const mbedtls_ecp_group_id *gid;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t len = 0;
-
- /* Match our preference list against the offered curves */
- for( gid = ssl->conf->curve_list; *gid != MBEDTLS_ECP_DP_NONE; gid++ )
- for( curve = ssl->handshake->curves; *curve != NULL; curve++ )
- if( (*curve)->grp_id == *gid )
- goto curve_matching_done;
-
-curve_matching_done:
- if( curve == NULL || *curve == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "no matching curve for ECDHE" ) );
- return( MBEDTLS_ERR_SSL_NO_CIPHER_CHOSEN );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "ECDHE curve: %s", (*curve)->name ) );
-
- if( ( ret = mbedtls_ecdh_setup( &ssl->handshake->ecdh_ctx,
- (*curve)->grp_id ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecp_group_load", ret );
- return( ret );
- }
-
- if( ( ret = mbedtls_ecdh_make_params(
- &ssl->handshake->ecdh_ctx, &len,
- ssl->out_msg + ssl->out_msglen,
- MBEDTLS_SSL_OUT_CONTENT_LEN - ssl->out_msglen,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_make_params", ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
- dig_signed = ssl->out_msg + ssl->out_msglen;
-#endif
-
- ssl->out_msglen += len;
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_Q );
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__ECDHE_ENABLED */
-
- /*
- *
- * Part 2: For key exchanges involving the server signing the
- * exchange parameters, compute and add the signature here.
- *
- */
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
- if( mbedtls_ssl_ciphersuite_uses_server_signature( ciphersuite_info ) )
- {
- size_t dig_signed_len = ssl->out_msg + ssl->out_msglen - dig_signed;
- size_t hashlen = 0;
- unsigned char hash[MBEDTLS_MD_MAX_SIZE];
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- /*
- * 2.1: Choose hash algorithm:
- * A: For TLS 1.2, obey signature-hash-algorithm extension
- * to choose appropriate hash.
- * B: For SSL3, TLS1.0, TLS1.1 and ECDHE_ECDSA, use SHA1
- * (RFC 4492, Sec. 5.4)
- * C: Otherwise, use MD5 + SHA1 (RFC 4346, Sec. 7.4.3)
- */
-
- mbedtls_md_type_t md_alg;
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- mbedtls_pk_type_t sig_alg =
- mbedtls_ssl_get_ciphersuite_sig_pk_alg( ciphersuite_info );
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- /* A: For TLS 1.2, obey signature-hash-algorithm extension
- * (RFC 5246, Sec. 7.4.1.4.1). */
- if( sig_alg == MBEDTLS_PK_NONE ||
- ( md_alg = mbedtls_ssl_sig_hash_set_find( &ssl->handshake->hash_algs,
- sig_alg ) ) == MBEDTLS_MD_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- /* (... because we choose a cipher suite
- * only if there is a matching hash.) */
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA )
- {
- /* B: Default hash SHA1 */
- md_alg = MBEDTLS_MD_SHA1;
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 || \
- MBEDTLS_SSL_PROTO_TLS1_1 */
- {
- /* C: MD5 + SHA1 */
- md_alg = MBEDTLS_MD_NONE;
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "pick hash algorithm %d for signing", md_alg ) );
-
- /*
- * 2.2: Compute the hash to be signed
- */
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- if( md_alg == MBEDTLS_MD_NONE )
- {
- hashlen = 36;
- ret = mbedtls_ssl_get_key_exchange_md_ssl_tls( ssl, hash,
- dig_signed,
- dig_signed_len );
- if( ret != 0 )
- return( ret );
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 || \
- MBEDTLS_SSL_PROTO_TLS1_1 */
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( md_alg != MBEDTLS_MD_NONE )
- {
- ret = mbedtls_ssl_get_key_exchange_md_tls1_2( ssl, hash, &hashlen,
- dig_signed,
- dig_signed_len,
- md_alg );
- if( ret != 0 )
- return( ret );
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \
- MBEDTLS_SSL_PROTO_TLS1_2 */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "parameters hash", hash, hashlen );
-
- /*
- * 2.3: Compute and add the signature
- */
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- /*
- * For TLS 1.2, we need to specify signature and hash algorithm
- * explicitly through a prefix to the signature.
- *
- * struct {
- * HashAlgorithm hash;
- * SignatureAlgorithm signature;
- * } SignatureAndHashAlgorithm;
- *
- * struct {
- * SignatureAndHashAlgorithm algorithm;
- * opaque signature<0..2^16-1>;
- * } DigitallySigned;
- *
- */
-
- ssl->out_msg[ssl->out_msglen++] =
- mbedtls_ssl_hash_from_md_alg( md_alg );
- ssl->out_msg[ssl->out_msglen++] =
- mbedtls_ssl_sig_from_pk_alg( sig_alg );
- }
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
-
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
- if( ssl->conf->f_async_sign_start != NULL )
- {
- ret = ssl->conf->f_async_sign_start( ssl,
- mbedtls_ssl_own_cert( ssl ),
- md_alg, hash, hashlen );
- switch( ret )
- {
- case MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH:
- /* act as if f_async_sign was null */
- break;
- case 0:
- ssl->handshake->async_in_progress = 1;
- return( ssl_resume_server_key_exchange( ssl, signature_len ) );
- case MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS:
- ssl->handshake->async_in_progress = 1;
- return( MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS );
- default:
- MBEDTLS_SSL_DEBUG_RET( 1, "f_async_sign_start", ret );
- return( ret );
- }
- }
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
-
- if( mbedtls_ssl_own_key( ssl ) == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no private key" ) );
- return( MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED );
- }
-
- /* Append the signature to ssl->out_msg, leaving 2 bytes for the
- * signature length which will be added in ssl_write_server_key_exchange
- * after the call to ssl_prepare_server_key_exchange.
- * ssl_write_server_key_exchange also takes care of incrementing
- * ssl->out_msglen. */
- if( ( ret = mbedtls_pk_sign( mbedtls_ssl_own_key( ssl ),
- md_alg, hash, hashlen,
- ssl->out_msg + ssl->out_msglen + 2,
- signature_len,
- ssl->conf->f_rng,
- ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_pk_sign", ret );
- return( ret );
- }
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
-
- return( 0 );
-}
-
-/* Prepare the ServerKeyExchange message and send it. For ciphersuites
- * that do not include a ServerKeyExchange message, do nothing. Either
- * way, if successful, move on to the next step in the SSL state
- * machine. */
-static int ssl_write_server_key_exchange( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t signature_len = 0;
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED)
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED */
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write server key exchange" ) );
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED)
- /* Extract static ECDH parameters and abort if ServerKeyExchange
- * is not needed. */
- if( mbedtls_ssl_ciphersuite_no_pfs( ciphersuite_info ) )
- {
- /* For suites involving ECDH, extract DH parameters
- * from certificate at this point. */
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED)
- if( mbedtls_ssl_ciphersuite_uses_ecdh( ciphersuite_info ) )
- {
- ssl_get_ecdh_params_from_cert( ssl );
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__ECDH_ENABLED */
-
- /* Key exchanges not involving ephemeral keys don't use
- * ServerKeyExchange, so end here. */
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write server key exchange" ) );
- ssl->state++;
- return( 0 );
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME_NON_PFS__ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) && \
- defined(MBEDTLS_SSL_ASYNC_PRIVATE)
- /* If we have already prepared the message and there is an ongoing
- * signature operation, resume signing. */
- if( ssl->handshake->async_in_progress != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "resuming signature operation" ) );
- ret = ssl_resume_server_key_exchange( ssl, &signature_len );
- }
- else
-#endif /* defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED) &&
- defined(MBEDTLS_SSL_ASYNC_PRIVATE) */
- {
- /* ServerKeyExchange is needed. Prepare the message. */
- ret = ssl_prepare_server_key_exchange( ssl, &signature_len );
- }
-
- if( ret != 0 )
- {
- /* If we're starting to write a new message, set ssl->out_msglen
- * to 0. But if we're resuming after an asynchronous message,
- * out_msglen is the amount of data written so far and mst be
- * preserved. */
- if( ret == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS )
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server key exchange (pending)" ) );
- else
- ssl->out_msglen = 0;
- return( ret );
- }
-
- /* If there is a signature, write its length.
- * ssl_prepare_server_key_exchange already wrote the signature
- * itself at its proper place in the output buffer. */
-#if defined(MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED)
- if( signature_len != 0 )
- {
- ssl->out_msg[ssl->out_msglen++] = (unsigned char)( signature_len >> 8 );
- ssl->out_msg[ssl->out_msglen++] = (unsigned char)( signature_len );
-
- MBEDTLS_SSL_DEBUG_BUF( 3, "my signature",
- ssl->out_msg + ssl->out_msglen,
- signature_len );
-
- /* Skip over the already-written signature */
- ssl->out_msglen += signature_len;
- }
-#endif /* MBEDTLS_KEY_EXCHANGE__WITH_SERVER_SIGNATURE__ENABLED */
-
- /* Add header and send. */
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_SERVER_KEY_EXCHANGE;
-
- ssl->state++;
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server key exchange" ) );
- return( 0 );
-}
-
-static int ssl_write_server_hello_done( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write server hello done" ) );
-
- ssl->out_msglen = 4;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_SERVER_HELLO_DONE;
-
- ssl->state++;
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- mbedtls_ssl_send_flight_completed( ssl );
-#endif
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret );
- return( ret );
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server hello done" ) );
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
-static int ssl_parse_client_dh_public( mbedtls_ssl_context *ssl, unsigned char **p,
- const unsigned char *end )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
- size_t n;
-
- /*
- * Receive G^Y mod P, premaster = (G^Y)^X mod P
- */
- if( *p + 2 > end )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- n = ( (*p)[0] << 8 ) | (*p)[1];
- *p += 2;
-
- if( *p + n > end )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- if( ( ret = mbedtls_dhm_read_public( &ssl->handshake->dhm_ctx, *p, n ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_read_public", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP );
- }
-
- *p += n;
-
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: GY", &ssl->handshake->dhm_ctx.GY );
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
-
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
-static int ssl_resume_decrypt_pms( mbedtls_ssl_context *ssl,
- unsigned char *peer_pms,
- size_t *peer_pmslen,
- size_t peer_pmssize )
-{
- int ret = ssl->conf->f_async_resume( ssl,
- peer_pms, peer_pmslen, peer_pmssize );
- if( ret != MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS )
- {
- ssl->handshake->async_in_progress = 0;
- mbedtls_ssl_set_async_operation_data( ssl, NULL );
- }
- MBEDTLS_SSL_DEBUG_RET( 2, "ssl_decrypt_encrypted_pms", ret );
- return( ret );
-}
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
-
-static int ssl_decrypt_encrypted_pms( mbedtls_ssl_context *ssl,
- const unsigned char *p,
- const unsigned char *end,
- unsigned char *peer_pms,
- size_t *peer_pmslen,
- size_t peer_pmssize )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- mbedtls_pk_context *private_key = mbedtls_ssl_own_key( ssl );
- mbedtls_pk_context *public_key = &mbedtls_ssl_own_cert( ssl )->pk;
- size_t len = mbedtls_pk_get_len( public_key );
-
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
- /* If we have already started decoding the message and there is an ongoing
- * decryption operation, resume signing. */
- if( ssl->handshake->async_in_progress != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "resuming decryption operation" ) );
- return( ssl_resume_decrypt_pms( ssl,
- peer_pms, peer_pmslen, peer_pmssize ) );
- }
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
-
- /*
- * Prepare to decrypt the premaster using own private RSA key
- */
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- if ( p + 2 > end ) {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
- if( *p++ != ( ( len >> 8 ) & 0xFF ) ||
- *p++ != ( ( len ) & 0xFF ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
- }
-#endif
-
- if( p + len != end )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- /*
- * Decrypt the premaster secret
- */
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
- if( ssl->conf->f_async_decrypt_start != NULL )
- {
- ret = ssl->conf->f_async_decrypt_start( ssl,
- mbedtls_ssl_own_cert( ssl ),
- p, len );
- switch( ret )
- {
- case MBEDTLS_ERR_SSL_HW_ACCEL_FALLTHROUGH:
- /* act as if f_async_decrypt_start was null */
- break;
- case 0:
- ssl->handshake->async_in_progress = 1;
- return( ssl_resume_decrypt_pms( ssl,
- peer_pms,
- peer_pmslen,
- peer_pmssize ) );
- case MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS:
- ssl->handshake->async_in_progress = 1;
- return( MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS );
- default:
- MBEDTLS_SSL_DEBUG_RET( 1, "f_async_decrypt_start", ret );
- return( ret );
- }
- }
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
-
- if( ! mbedtls_pk_can_do( private_key, MBEDTLS_PK_RSA ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no RSA private key" ) );
- return( MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED );
- }
-
- ret = mbedtls_pk_decrypt( private_key, p, len,
- peer_pms, peer_pmslen, peer_pmssize,
- ssl->conf->f_rng, ssl->conf->p_rng );
- return( ret );
-}
-
-static int ssl_parse_encrypted_pms( mbedtls_ssl_context *ssl,
- const unsigned char *p,
- const unsigned char *end,
- size_t pms_offset )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char *pms = ssl->handshake->premaster + pms_offset;
- unsigned char ver[2];
- unsigned char fake_pms[48], peer_pms[48];
- unsigned char mask;
- size_t i, peer_pmslen;
- unsigned int diff;
-
- /* In case of a failure in decryption, the decryption may write less than
- * 2 bytes of output, but we always read the first two bytes. It doesn't
- * matter in the end because diff will be nonzero in that case due to
- * peer_pmslen being less than 48, and we only care whether diff is 0.
- * But do initialize peer_pms for robustness anyway. This also makes
- * memory analyzers happy (don't access uninitialized memory, even
- * if it's an unsigned char). */
- peer_pms[0] = peer_pms[1] = ~0;
-
- ret = ssl_decrypt_encrypted_pms( ssl, p, end,
- peer_pms,
- &peer_pmslen,
- sizeof( peer_pms ) );
-
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
- if ( ret == MBEDTLS_ERR_SSL_ASYNC_IN_PROGRESS )
- return( ret );
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
-
- mbedtls_ssl_write_version( ssl->handshake->max_major_ver,
- ssl->handshake->max_minor_ver,
- ssl->conf->transport, ver );
-
- /* Avoid data-dependent branches while checking for invalid
- * padding, to protect against timing-based Bleichenbacher-type
- * attacks. */
- diff = (unsigned int) ret;
- diff |= peer_pmslen ^ 48;
- diff |= peer_pms[0] ^ ver[0];
- diff |= peer_pms[1] ^ ver[1];
-
- /* mask = diff ? 0xff : 0x00 using bit operations to avoid branches */
- /* MSVC has a warning about unary minus on unsigned, but this is
- * well-defined and precisely what we want to do here */
-#if defined(_MSC_VER)
-#pragma warning( push )
-#pragma warning( disable : 4146 )
-#endif
- mask = - ( ( diff | - diff ) >> ( sizeof( unsigned int ) * 8 - 1 ) );
-#if defined(_MSC_VER)
-#pragma warning( pop )
-#endif
-
- /*
- * Protection against Bleichenbacher's attack: invalid PKCS#1 v1.5 padding
- * must not cause the connection to end immediately; instead, send a
- * bad_record_mac later in the handshake.
- * To protect against timing-based variants of the attack, we must
- * not have any branch that depends on whether the decryption was
- * successful. In particular, always generate the fake premaster secret,
- * regardless of whether it will ultimately influence the output or not.
- */
- ret = ssl->conf->f_rng( ssl->conf->p_rng, fake_pms, sizeof( fake_pms ) );
- if( ret != 0 )
- {
- /* It's ok to abort on an RNG failure, since this does not reveal
- * anything about the RSA decryption. */
- return( ret );
- }
-
-#if defined(MBEDTLS_SSL_DEBUG_ALL)
- if( diff != 0 )
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
-#endif
-
- if( sizeof( ssl->handshake->premaster ) < pms_offset ||
- sizeof( ssl->handshake->premaster ) - pms_offset < 48 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
- ssl->handshake->pmslen = 48;
-
- /* Set pms to either the true or the fake PMS, without
- * data-dependent branches. */
- for( i = 0; i < ssl->handshake->pmslen; i++ )
- pms[i] = ( mask & fake_pms[i] ) | ( (~mask) & peer_pms[i] );
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
-
-#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)
-static int ssl_parse_client_psk_identity( mbedtls_ssl_context *ssl, unsigned char **p,
- const unsigned char *end )
-{
- int ret = 0;
- size_t n;
-
- if( ssl_conf_has_psk_or_cb( ssl->conf ) == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no pre-shared key" ) );
- return( MBEDTLS_ERR_SSL_PRIVATE_KEY_REQUIRED );
- }
-
- /*
- * Receive client pre-shared key identity name
- */
- if( end - *p < 2 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- n = ( (*p)[0] << 8 ) | (*p)[1];
- *p += 2;
-
- if( n < 1 || n > 65535 || n > (size_t) ( end - *p ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- if( ssl->conf->f_psk != NULL )
- {
- if( ssl->conf->f_psk( ssl->conf->p_psk, ssl, *p, n ) != 0 )
- ret = MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY;
- }
- else
- {
- /* Identity is not a big secret since clients send it in the clear,
- * but treat it carefully anyway, just in case */
- if( n != ssl->conf->psk_identity_len ||
- mbedtls_ssl_safer_memcmp( ssl->conf->psk_identity, *p, n ) != 0 )
- {
- ret = MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY;
- }
- }
-
- if( ret == MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY )
- {
- MBEDTLS_SSL_DEBUG_BUF( 3, "Unknown PSK identity", *p, n );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_UNKNOWN_PSK_IDENTITY );
- return( MBEDTLS_ERR_SSL_UNKNOWN_IDENTITY );
- }
-
- *p += n;
-
- return( 0 );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-
-static int ssl_parse_client_key_exchange( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info;
- unsigned char *p, *end;
-
- ciphersuite_info = ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse client key exchange" ) );
-
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE) && \
- ( defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED) )
- if( ( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA ) &&
- ( ssl->handshake->async_in_progress != 0 ) )
- {
- /* We've already read a record and there is an asynchronous
- * operation in progress to decrypt it. So skip reading the
- * record. */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "will resume decryption of previously-read record" ) );
- }
- else
-#endif
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- return( ret );
- }
-
- p = ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl );
- end = ssl->in_msg + ssl->in_hslen;
-
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- if( ssl->in_msg[0] != MBEDTLS_SSL_HS_CLIENT_KEY_EXCHANGE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_RSA )
- {
- if( ( ret = ssl_parse_client_dh_public( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_dh_public" ), ret );
- return( ret );
- }
-
- if( p != end )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- if( ( ret = mbedtls_dhm_calc_secret( &ssl->handshake->dhm_ctx,
- ssl->handshake->premaster,
- MBEDTLS_PREMASTER_SIZE,
- &ssl->handshake->pmslen,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_dhm_calc_secret", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS );
- }
-
- MBEDTLS_SSL_DEBUG_MPI( 3, "DHM: K ", &ssl->handshake->dhm_ctx.K );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED) || \
- defined(MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_RSA ||
- ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA )
- {
- if( ( ret = mbedtls_ecdh_read_public( &ssl->handshake->ecdh_ctx,
- p, end - p) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_read_public", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP );
- }
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_QP );
-
- if( ( ret = mbedtls_ecdh_calc_secret( &ssl->handshake->ecdh_ctx,
- &ssl->handshake->pmslen,
- ssl->handshake->premaster,
- MBEDTLS_MPI_MAX_SIZE,
- ssl->conf->f_rng, ssl->conf->p_rng ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_calc_secret", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_CS );
- }
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_Z );
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_RSA_ENABLED ||
- MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_PSK )
- {
- if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
- return( ret );
- }
-
- if( p != end )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* For opaque PSKs, we perform the PSK-to-MS derivation atomatically
- * and skip the intermediate PMS. */
- if( ssl_use_opaque_psk( ssl ) == 1 )
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "skip PMS generation for opaque PSK" ) );
- else
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
- if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
- {
-#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
- if ( ssl->handshake->async_in_progress != 0 )
- {
- /* There is an asynchronous operation in progress to
- * decrypt the encrypted premaster secret, so skip
- * directly to resuming this operation. */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "PSK identity already parsed" ) );
- /* Update p to skip the PSK identity. ssl_parse_encrypted_pms
- * won't actually use it, but maintain p anyway for robustness. */
- p += ssl->conf->psk_identity_len + 2;
- }
- else
-#endif /* MBEDTLS_SSL_ASYNC_PRIVATE */
- if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Opaque PSKs are currently only supported for PSK-only. */
- if( ssl_use_opaque_psk( ssl ) == 1 )
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-#endif
-
- if( ( ret = ssl_parse_encrypted_pms( ssl, p, end, 2 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_encrypted_pms" ), ret );
- return( ret );
- }
-
- if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_DHE_PSK )
- {
- if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
- return( ret );
- }
- if( ( ret = ssl_parse_client_dh_public( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_dh_public" ), ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Opaque PSKs are currently only supported for PSK-only. */
- if( ssl_use_opaque_psk( ssl ) == 1 )
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-#endif
-
- if( p != end )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad client key exchange" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE );
- }
-
- if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_DHE_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECDHE_PSK )
- {
- if( ( ret = ssl_parse_client_psk_identity( ssl, &p, end ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_client_psk_identity" ), ret );
- return( ret );
- }
-
- if( ( ret = mbedtls_ecdh_read_public( &ssl->handshake->ecdh_ctx,
- p, end - p ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecdh_read_public", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_KEY_EXCHANGE_RP );
- }
-
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
- /* Opaque PSKs are currently only supported for PSK-only. */
- if( ssl_use_opaque_psk( ssl ) == 1 )
- return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
-#endif
-
- MBEDTLS_SSL_DEBUG_ECDH( 3, &ssl->handshake->ecdh_ctx,
- MBEDTLS_DEBUG_ECDH_QP );
-
- if( ( ret = mbedtls_ssl_psk_derive_premaster( ssl,
- ciphersuite_info->key_exchange ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_psk_derive_premaster", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECDHE_PSK_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_RSA_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA )
- {
- if( ( ret = ssl_parse_encrypted_pms( ssl, p, end, 0 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "ssl_parse_parse_encrypted_pms_secret" ), ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_RSA_ENABLED */
-#if defined(MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED)
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_ECJPAKE )
- {
- ret = mbedtls_ecjpake_read_round_two( &ssl->handshake->ecjpake_ctx,
- p, end - p );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_read_round_two", ret );
- return( MBEDTLS_ERR_SSL_BAD_HS_SERVER_KEY_EXCHANGE );
- }
-
- ret = mbedtls_ecjpake_derive_secret( &ssl->handshake->ecjpake_ctx,
- ssl->handshake->premaster, 32, &ssl->handshake->pmslen,
- ssl->conf->f_rng, ssl->conf->p_rng );
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ecjpake_derive_secret", ret );
- return( ret );
- }
- }
- else
-#endif /* MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- if( ( ret = mbedtls_ssl_derive_keys( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_derive_keys", ret );
- return( ret );
- }
-
- ssl->state++;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse client key exchange" ) );
-
- return( 0 );
-}
-
-#if !defined(MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED)
-static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate verify" ) );
-
- if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-}
-#else /* !MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
-static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
- size_t i, sig_len;
- unsigned char hash[48];
- unsigned char *hash_start = hash;
- size_t hashlen;
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- mbedtls_pk_type_t pk_alg;
-#endif
- mbedtls_md_type_t md_alg;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
- mbedtls_pk_context * peer_pk;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate verify" ) );
-
- if( !mbedtls_ssl_ciphersuite_cert_req_allowed( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- if( ssl->session_negotiate->peer_cert == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( ssl->session_negotiate->peer_cert_digest == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate verify" ) );
- ssl->state++;
- return( 0 );
- }
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- /* Read the message without adding it to the checksum */
- ret = mbedtls_ssl_read_record( ssl, 0 /* no checksum update */ );
- if( 0 != ret )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, ( "mbedtls_ssl_read_record" ), ret );
- return( ret );
- }
-
- ssl->state++;
-
- /* Process the message contents */
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE ||
- ssl->in_msg[0] != MBEDTLS_SSL_HS_CERTIFICATE_VERIFY )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate verify message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY );
- }
-
- i = mbedtls_ssl_hs_hdr_len( ssl );
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- peer_pk = &ssl->handshake->peer_pubkey;
-#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- if( ssl->session_negotiate->peer_cert == NULL )
- {
- /* Should never happen */
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
- peer_pk = &ssl->session_negotiate->peer_cert->pk;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- /*
- * struct {
- * SignatureAndHashAlgorithm algorithm; -- TLS 1.2 only
- * opaque signature<0..2^16-1>;
- * } DigitallySigned;
- */
-#if defined(MBEDTLS_SSL_PROTO_SSL3) || defined(MBEDTLS_SSL_PROTO_TLS1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_1)
- if( ssl->minor_ver != MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- md_alg = MBEDTLS_MD_NONE;
- hashlen = 36;
-
- /* For ECDSA, use SHA-1, not MD-5 + SHA-1 */
- if( mbedtls_pk_can_do( peer_pk, MBEDTLS_PK_ECDSA ) )
- {
- hash_start += 16;
- hashlen -= 16;
- md_alg = MBEDTLS_MD_SHA1;
- }
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_SSL3 || MBEDTLS_SSL_PROTO_TLS1 ||
- MBEDTLS_SSL_PROTO_TLS1_1 */
-#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_3 )
- {
- if( i + 2 > ssl->in_hslen )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate verify message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY );
- }
-
- /*
- * Hash
- */
- md_alg = mbedtls_ssl_md_alg_from_hash( ssl->in_msg[i] );
-
- if( md_alg == MBEDTLS_MD_NONE || mbedtls_ssl_set_calc_verify_md( ssl, ssl->in_msg[i] ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "peer not adhering to requested sig_alg"
- " for verify message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY );
- }
-
-#if !defined(MBEDTLS_MD_SHA1)
- if( MBEDTLS_MD_SHA1 == md_alg )
- hash_start += 16;
-#endif
-
- /* Info from md_alg will be used instead */
- hashlen = 0;
-
- i++;
-
- /*
- * Signature
- */
- if( ( pk_alg = mbedtls_ssl_pk_alg_from_sig( ssl->in_msg[i] ) )
- == MBEDTLS_PK_NONE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "peer not adhering to requested sig_alg"
- " for verify message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY );
- }
-
- /*
- * Check the certificate's key type matches the signature alg
- */
- if( !mbedtls_pk_can_do( peer_pk, pk_alg ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "sig_alg doesn't match cert key" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY );
- }
-
- i++;
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- if( i + 2 > ssl->in_hslen )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate verify message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY );
- }
-
- sig_len = ( ssl->in_msg[i] << 8 ) | ssl->in_msg[i+1];
- i += 2;
-
- if( i + sig_len != ssl->in_hslen )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate verify message" ) );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE_VERIFY );
- }
-
- /* Calculate hash and verify signature */
- {
- size_t dummy_hlen;
- ssl->handshake->calc_verify( ssl, hash, &dummy_hlen );
- }
-
- if( ( ret = mbedtls_pk_verify( peer_pk,
- md_alg, hash_start, hashlen,
- ssl->in_msg + i, sig_len ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_pk_verify", ret );
- return( ret );
- }
-
- mbedtls_ssl_update_handshake_status( ssl );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate verify" ) );
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__CERT_REQ_ALLOWED__ENABLED */
-
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
-static int ssl_write_new_session_ticket( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- size_t tlen;
- uint32_t lifetime;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write new session ticket" ) );
-
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_NEW_SESSION_TICKET;
-
- /*
- * struct {
- * uint32 ticket_lifetime_hint;
- * opaque ticket<0..2^16-1>;
- * } NewSessionTicket;
- *
- * 4 . 7 ticket_lifetime_hint (0 = unspecified)
- * 8 . 9 ticket_len (n)
- * 10 . 9+n ticket content
- */
-
- if( ( ret = ssl->conf->f_ticket_write( ssl->conf->p_ticket,
- ssl->session_negotiate,
- ssl->out_msg + 10,
- ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN,
- &tlen, &lifetime ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_ticket_write", ret );
- tlen = 0;
- }
-
- ssl->out_msg[4] = ( lifetime >> 24 ) & 0xFF;
- ssl->out_msg[5] = ( lifetime >> 16 ) & 0xFF;
- ssl->out_msg[6] = ( lifetime >> 8 ) & 0xFF;
- ssl->out_msg[7] = ( lifetime ) & 0xFF;
-
- ssl->out_msg[8] = (unsigned char)( ( tlen >> 8 ) & 0xFF );
- ssl->out_msg[9] = (unsigned char)( ( tlen ) & 0xFF );
-
- ssl->out_msglen = 10 + tlen;
-
- /*
- * Morally equivalent to updating ssl->state, but NewSessionTicket and
- * ChangeCipherSpec share the same state.
- */
- ssl->handshake->new_session_ticket = 0;
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write new session ticket" ) );
-
- return( 0 );
-}
-#endif /* MBEDTLS_SSL_SESSION_TICKETS */
-
-/*
- * SSL handshake -- server side -- single step
- */
-int mbedtls_ssl_handshake_server_step( mbedtls_ssl_context *ssl )
-{
- int ret = 0;
-
- if( ssl->state == MBEDTLS_SSL_HANDSHAKE_OVER || ssl->handshake == NULL )
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "server state: %d", ssl->state ) );
-
- if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
- return( ret );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ssl->handshake->retransmit_state == MBEDTLS_SSL_RETRANS_SENDING )
- {
- if( ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
- return( ret );
- }
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
-
- switch( ssl->state )
- {
- case MBEDTLS_SSL_HELLO_REQUEST:
- ssl->state = MBEDTLS_SSL_CLIENT_HELLO;
- break;
-
- /*
- * <== ClientHello
- */
- case MBEDTLS_SSL_CLIENT_HELLO:
- ret = ssl_parse_client_hello( ssl );
- break;
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- case MBEDTLS_SSL_SERVER_HELLO_VERIFY_REQUEST_SENT:
- return( MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED );
-#endif
-
- /*
- * ==> ServerHello
- * Certificate
- * ( ServerKeyExchange )
- * ( CertificateRequest )
- * ServerHelloDone
- */
- case MBEDTLS_SSL_SERVER_HELLO:
- ret = ssl_write_server_hello( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_CERTIFICATE:
- ret = mbedtls_ssl_write_certificate( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_KEY_EXCHANGE:
- ret = ssl_write_server_key_exchange( ssl );
- break;
-
- case MBEDTLS_SSL_CERTIFICATE_REQUEST:
- ret = ssl_write_certificate_request( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_HELLO_DONE:
- ret = ssl_write_server_hello_done( ssl );
- break;
-
- /*
- * <== ( Certificate/Alert )
- * ClientKeyExchange
- * ( CertificateVerify )
- * ChangeCipherSpec
- * Finished
- */
- case MBEDTLS_SSL_CLIENT_CERTIFICATE:
- ret = mbedtls_ssl_parse_certificate( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_KEY_EXCHANGE:
- ret = ssl_parse_client_key_exchange( ssl );
- break;
-
- case MBEDTLS_SSL_CERTIFICATE_VERIFY:
- ret = ssl_parse_certificate_verify( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC:
- ret = mbedtls_ssl_parse_change_cipher_spec( ssl );
- break;
-
- case MBEDTLS_SSL_CLIENT_FINISHED:
- ret = mbedtls_ssl_parse_finished( ssl );
- break;
-
- /*
- * ==> ( NewSessionTicket )
- * ChangeCipherSpec
- * Finished
- */
- case MBEDTLS_SSL_SERVER_CHANGE_CIPHER_SPEC:
-#if defined(MBEDTLS_SSL_SESSION_TICKETS)
- if( ssl->handshake->new_session_ticket != 0 )
- ret = ssl_write_new_session_ticket( ssl );
- else
-#endif
- ret = mbedtls_ssl_write_change_cipher_spec( ssl );
- break;
-
- case MBEDTLS_SSL_SERVER_FINISHED:
- ret = mbedtls_ssl_write_finished( ssl );
- break;
-
- case MBEDTLS_SSL_FLUSH_BUFFERS:
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "handshake: done" ) );
- ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
- break;
-
- case MBEDTLS_SSL_HANDSHAKE_WRAPUP:
- mbedtls_ssl_handshake_wrapup( ssl );
- break;
-
- default:
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "invalid state %d", ssl->state ) );
- return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- }
-
- return( ret );
-}
#endif /* MBEDTLS_SSL_SRV_C */
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index ab9cb89..49f65f9 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1943,51 +1943,6 @@
}
#endif /* MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED */
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
-/*
- * SSLv3.0 MAC functions
- */
-#define SSL_MAC_MAX_BYTES 20 /* MD-5 or SHA-1 */
-static void ssl_mac( mbedtls_md_context_t *md_ctx,
- const unsigned char *secret,
- const unsigned char *buf, size_t len,
- const unsigned char *ctr, int type,
- unsigned char out[SSL_MAC_MAX_BYTES] )
-{
- unsigned char header[11];
- unsigned char padding[48];
- int padlen;
- int md_size = mbedtls_md_get_size( md_ctx->md_info );
- int md_type = mbedtls_md_get_type( md_ctx->md_info );
-
- /* Only MD5 and SHA-1 supported */
- if( md_type == MBEDTLS_MD_MD5 )
- padlen = 48;
- else
- padlen = 40;
-
- memcpy( header, ctr, 8 );
- header[ 8] = (unsigned char) type;
- header[ 9] = (unsigned char)( len >> 8 );
- header[10] = (unsigned char)( len );
-
- memset( padding, 0x36, padlen );
- mbedtls_md_starts( md_ctx );
- mbedtls_md_update( md_ctx, secret, md_size );
- mbedtls_md_update( md_ctx, padding, padlen );
- mbedtls_md_update( md_ctx, header, 11 );
- mbedtls_md_update( md_ctx, buf, len );
- mbedtls_md_finish( md_ctx, out );
-
- memset( padding, 0x5C, padlen );
- mbedtls_md_starts( md_ctx );
- mbedtls_md_update( md_ctx, secret, md_size );
- mbedtls_md_update( md_ctx, padding, padlen );
- mbedtls_md_update( md_ctx, out, md_size );
- mbedtls_md_finish( md_ctx, out );
-}
-#endif /* MBEDTLS_SSL_PROTO_SSL3 */
-
#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_RENEGOTIATION)
static int ssl_write_hello_request( mbedtls_ssl_context *ssl );
@@ -2020,7 +1975,7 @@
#endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_RENEGOTIATION */
#if defined(MBEDTLS_X509_CRT_PARSE_C)
-static void ssl_clear_peer_cert( mbedtls_ssl_session *session )
+void mbedtls_ssl_clear_peer_cert( mbedtls_ssl_session *session )
{
#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
if( session->peer_cert != NULL )
@@ -2045,830 +2000,6 @@
/*
* Handshake functions
*/
-#if !defined(MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED)
-/* No certificate support -> dummy functions */
-int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) );
-
- if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
- ssl->state++;
- return( 0 );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-}
-
-int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
-
- if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
- ssl->state++;
- return( 0 );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
-}
-
-#else /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
-/* Some certificate support -> implement write and parse */
-
-int mbedtls_ssl_write_certificate( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
- size_t i, n;
- const mbedtls_x509_crt *crt;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write certificate" ) );
-
- if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
- ssl->state++;
- return( 0 );
- }
-
-#if defined(MBEDTLS_SSL_CLI_C)
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
- {
- if( ssl->client_auth == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip write certificate" ) );
- ssl->state++;
- return( 0 );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- /*
- * If using SSLv3 and got no cert, send an Alert message
- * (otherwise an empty Certificate message will be sent).
- */
- if( mbedtls_ssl_own_cert( ssl ) == NULL &&
- ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- ssl->out_msglen = 2;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_ALERT;
- ssl->out_msg[0] = MBEDTLS_SSL_ALERT_LEVEL_WARNING;
- ssl->out_msg[1] = MBEDTLS_SSL_ALERT_MSG_NO_CERT;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "got no certificate to send" ) );
- goto write_msg;
- }
-#endif /* MBEDTLS_SSL_PROTO_SSL3 */
- }
-#endif /* MBEDTLS_SSL_CLI_C */
-#if defined(MBEDTLS_SSL_SRV_C)
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
- {
- if( mbedtls_ssl_own_cert( ssl ) == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no certificate to send" ) );
- return( MBEDTLS_ERR_SSL_CERTIFICATE_REQUIRED );
- }
- }
-#endif
-
- MBEDTLS_SSL_DEBUG_CRT( 3, "own certificate", mbedtls_ssl_own_cert( ssl ) );
-
- /*
- * 0 . 0 handshake type
- * 1 . 3 handshake length
- * 4 . 6 length of all certs
- * 7 . 9 length of cert. 1
- * 10 . n-1 peer certificate
- * n . n+2 length of cert. 2
- * n+3 . ... upper level cert, etc.
- */
- i = 7;
- crt = mbedtls_ssl_own_cert( ssl );
-
- while( crt != NULL )
- {
- n = crt->raw.len;
- if( n > MBEDTLS_SSL_OUT_CONTENT_LEN - 3 - i )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "certificate too large, %d > %d",
- i + 3 + n, MBEDTLS_SSL_OUT_CONTENT_LEN ) );
- return( MBEDTLS_ERR_SSL_CERTIFICATE_TOO_LARGE );
- }
-
- ssl->out_msg[i ] = (unsigned char)( n >> 16 );
- ssl->out_msg[i + 1] = (unsigned char)( n >> 8 );
- ssl->out_msg[i + 2] = (unsigned char)( n );
-
- i += 3; memcpy( ssl->out_msg + i, crt->raw.p, n );
- i += n; crt = crt->next;
- }
-
- ssl->out_msg[4] = (unsigned char)( ( i - 7 ) >> 16 );
- ssl->out_msg[5] = (unsigned char)( ( i - 7 ) >> 8 );
- ssl->out_msg[6] = (unsigned char)( ( i - 7 ) );
-
- ssl->out_msglen = i;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_CERTIFICATE;
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3) && defined(MBEDTLS_SSL_CLI_C)
-write_msg:
-#endif
-
- ssl->state++;
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write certificate" ) );
-
- return( ret );
-}
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C)
-
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
-static int ssl_check_peer_crt_unchanged( mbedtls_ssl_context *ssl,
- unsigned char *crt_buf,
- size_t crt_buf_len )
-{
- mbedtls_x509_crt const * const peer_crt = ssl->session->peer_cert;
-
- if( peer_crt == NULL )
- return( -1 );
-
- if( peer_crt->raw.len != crt_buf_len )
- return( -1 );
-
- return( memcmp( peer_crt->raw.p, crt_buf, peer_crt->raw.len ) );
-}
-#else /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-static int ssl_check_peer_crt_unchanged( mbedtls_ssl_context *ssl,
- unsigned char *crt_buf,
- size_t crt_buf_len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned char const * const peer_cert_digest =
- ssl->session->peer_cert_digest;
- mbedtls_md_type_t const peer_cert_digest_type =
- ssl->session->peer_cert_digest_type;
- mbedtls_md_info_t const * const digest_info =
- mbedtls_md_info_from_type( peer_cert_digest_type );
- unsigned char tmp_digest[MBEDTLS_SSL_PEER_CERT_DIGEST_MAX_LEN];
- size_t digest_len;
-
- if( peer_cert_digest == NULL || digest_info == NULL )
- return( -1 );
-
- digest_len = mbedtls_md_get_size( digest_info );
- if( digest_len > MBEDTLS_SSL_PEER_CERT_DIGEST_MAX_LEN )
- return( -1 );
-
- ret = mbedtls_md( digest_info, crt_buf, crt_buf_len, tmp_digest );
- if( ret != 0 )
- return( -1 );
-
- return( memcmp( tmp_digest, peer_cert_digest, digest_len ) );
-}
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-#endif /* MBEDTLS_SSL_RENEGOTIATION && MBEDTLS_SSL_CLI_C */
-
-/*
- * Once the certificate message is read, parse it into a cert chain and
- * perform basic checks, but leave actual verification to the caller
- */
-static int ssl_parse_certificate_chain( mbedtls_ssl_context *ssl,
- mbedtls_x509_crt *chain )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C)
- int crt_cnt=0;
-#endif
- size_t i, n;
- uint8_t alert;
-
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
- return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- if( ssl->in_msg[0] != MBEDTLS_SSL_HS_CERTIFICATE ||
- ssl->in_hslen < mbedtls_ssl_hs_hdr_len( ssl ) + 3 + 3 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
- }
-
- i = mbedtls_ssl_hs_hdr_len( ssl );
-
- /*
- * Same message structure as in mbedtls_ssl_write_certificate()
- */
- n = ( ssl->in_msg[i+1] << 8 ) | ssl->in_msg[i+2];
-
- if( ssl->in_msg[i] != 0 ||
- ssl->in_hslen != n + 3 + mbedtls_ssl_hs_hdr_len( ssl ) )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
- }
-
- /* Make &ssl->in_msg[i] point to the beginning of the CRT chain. */
- i += 3;
-
- /* Iterate through and parse the CRTs in the provided chain. */
- while( i < ssl->in_hslen )
- {
- /* Check that there's room for the next CRT's length fields. */
- if ( i + 3 > ssl->in_hslen ) {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- mbedtls_ssl_send_alert_message( ssl,
- MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
- }
- /* In theory, the CRT can be up to 2**24 Bytes, but we don't support
- * anything beyond 2**16 ~ 64K. */
- if( ssl->in_msg[i] != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- mbedtls_ssl_send_alert_message( ssl,
- MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
- }
-
- /* Read length of the next CRT in the chain. */
- n = ( (unsigned int) ssl->in_msg[i + 1] << 8 )
- | (unsigned int) ssl->in_msg[i + 2];
- i += 3;
-
- if( n < 128 || i + n > ssl->in_hslen )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate message" ) );
- mbedtls_ssl_send_alert_message( ssl,
- MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
- }
-
- /* Check if we're handling the first CRT in the chain. */
-#if defined(MBEDTLS_SSL_RENEGOTIATION) && defined(MBEDTLS_SSL_CLI_C)
- if( crt_cnt++ == 0 &&
- ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
- ssl->renego_status == MBEDTLS_SSL_RENEGOTIATION_IN_PROGRESS )
- {
- /* During client-side renegotiation, check that the server's
- * end-CRTs hasn't changed compared to the initial handshake,
- * mitigating the triple handshake attack. On success, reuse
- * the original end-CRT instead of parsing it again. */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Check that peer CRT hasn't changed during renegotiation" ) );
- if( ssl_check_peer_crt_unchanged( ssl,
- &ssl->in_msg[i],
- n ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "new server cert during renegotiation" ) );
- mbedtls_ssl_send_alert_message( ssl,
- MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED );
- return( MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE );
- }
-
- /* Now we can safely free the original chain. */
- ssl_clear_peer_cert( ssl->session );
- }
-#endif /* MBEDTLS_SSL_RENEGOTIATION && MBEDTLS_SSL_CLI_C */
-
- /* Parse the next certificate in the chain. */
-#if defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- ret = mbedtls_x509_crt_parse_der( chain, ssl->in_msg + i, n );
-#else
- /* If we don't need to store the CRT chain permanently, parse
- * it in-place from the input buffer instead of making a copy. */
- ret = mbedtls_x509_crt_parse_der_nocopy( chain, ssl->in_msg + i, n );
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- switch( ret )
- {
- case 0: /*ok*/
- case MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG + MBEDTLS_ERR_OID_NOT_FOUND:
- /* Ignore certificate with an unknown algorithm: maybe a
- prior certificate was already trusted. */
- break;
-
- case MBEDTLS_ERR_X509_ALLOC_FAILED:
- alert = MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR;
- goto crt_parse_der_failed;
-
- case MBEDTLS_ERR_X509_UNKNOWN_VERSION:
- alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
- goto crt_parse_der_failed;
-
- default:
- alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT;
- crt_parse_der_failed:
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL, alert );
- MBEDTLS_SSL_DEBUG_RET( 1, " mbedtls_x509_crt_parse_der", ret );
- return( ret );
- }
-
- i += n;
- }
-
- MBEDTLS_SSL_DEBUG_CRT( 3, "peer certificate", chain );
- return( 0 );
-}
-
-#if defined(MBEDTLS_SSL_SRV_C)
-static int ssl_srv_check_client_no_crt_notification( mbedtls_ssl_context *ssl )
-{
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
- return( -1 );
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- /*
- * Check if the client sent an empty certificate
- */
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- {
- if( ssl->in_msglen == 2 &&
- ssl->in_msgtype == MBEDTLS_SSL_MSG_ALERT &&
- ssl->in_msg[0] == MBEDTLS_SSL_ALERT_LEVEL_WARNING &&
- ssl->in_msg[1] == MBEDTLS_SSL_ALERT_MSG_NO_CERT )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "SSLv3 client has no certificate" ) );
- return( 0 );
- }
-
- return( -1 );
- }
-#endif /* MBEDTLS_SSL_PROTO_SSL3 */
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1) || defined(MBEDTLS_SSL_PROTO_TLS1_1) || \
- defined(MBEDTLS_SSL_PROTO_TLS1_2)
- if( ssl->in_hslen == 3 + mbedtls_ssl_hs_hdr_len( ssl ) &&
- ssl->in_msgtype == MBEDTLS_SSL_MSG_HANDSHAKE &&
- ssl->in_msg[0] == MBEDTLS_SSL_HS_CERTIFICATE &&
- memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ), "\0\0\0", 3 ) == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "TLSv1 client has no certificate" ) );
- return( 0 );
- }
-
- return( -1 );
-#endif /* MBEDTLS_SSL_PROTO_TLS1 || MBEDTLS_SSL_PROTO_TLS1_1 || \
- MBEDTLS_SSL_PROTO_TLS1_2 */
-}
-#endif /* MBEDTLS_SSL_SRV_C */
-
-/* Check if a certificate message is expected.
- * Return either
- * - SSL_CERTIFICATE_EXPECTED, or
- * - SSL_CERTIFICATE_SKIP
- * indicating whether a Certificate message is expected or not.
- */
-#define SSL_CERTIFICATE_EXPECTED 0
-#define SSL_CERTIFICATE_SKIP 1
-static int ssl_parse_certificate_coordinate( mbedtls_ssl_context *ssl,
- int authmode )
-{
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
-
- if( !mbedtls_ssl_ciphersuite_uses_srv_cert( ciphersuite_info ) )
- return( SSL_CERTIFICATE_SKIP );
-
-#if defined(MBEDTLS_SSL_SRV_C)
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
- {
- if( ciphersuite_info->key_exchange == MBEDTLS_KEY_EXCHANGE_RSA_PSK )
- return( SSL_CERTIFICATE_SKIP );
-
- if( authmode == MBEDTLS_SSL_VERIFY_NONE )
- {
- ssl->session_negotiate->verify_result =
- MBEDTLS_X509_BADCERT_SKIP_VERIFY;
- return( SSL_CERTIFICATE_SKIP );
- }
- }
-#else
- ((void) authmode);
-#endif /* MBEDTLS_SSL_SRV_C */
-
- return( SSL_CERTIFICATE_EXPECTED );
-}
-
-static int ssl_parse_certificate_verify( mbedtls_ssl_context *ssl,
- int authmode,
- mbedtls_x509_crt *chain,
- void *rs_ctx )
-{
- int ret = 0;
- const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
- ssl->handshake->ciphersuite_info;
- int have_ca_chain = 0;
-
- int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *);
- void *p_vrfy;
-
- if( authmode == MBEDTLS_SSL_VERIFY_NONE )
- return( 0 );
-
- if( ssl->f_vrfy != NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Use context-specific verification callback" ) );
- f_vrfy = ssl->f_vrfy;
- p_vrfy = ssl->p_vrfy;
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Use configuration-specific verification callback" ) );
- f_vrfy = ssl->conf->f_vrfy;
- p_vrfy = ssl->conf->p_vrfy;
- }
-
- /*
- * Main check: verify certificate
- */
-#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
- if( ssl->conf->f_ca_cb != NULL )
- {
- ((void) rs_ctx);
- have_ca_chain = 1;
-
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "use CA callback for X.509 CRT verification" ) );
- ret = mbedtls_x509_crt_verify_with_ca_cb(
- chain,
- ssl->conf->f_ca_cb,
- ssl->conf->p_ca_cb,
- ssl->conf->cert_profile,
- ssl->hostname,
- &ssl->session_negotiate->verify_result,
- f_vrfy, p_vrfy );
- }
- else
-#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
- {
- mbedtls_x509_crt *ca_chain;
- mbedtls_x509_crl *ca_crl;
-
-#if defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- if( ssl->handshake->sni_ca_chain != NULL )
- {
- ca_chain = ssl->handshake->sni_ca_chain;
- ca_crl = ssl->handshake->sni_ca_crl;
- }
- else
-#endif
- {
- ca_chain = ssl->conf->ca_chain;
- ca_crl = ssl->conf->ca_crl;
- }
-
- if( ca_chain != NULL )
- have_ca_chain = 1;
-
- ret = mbedtls_x509_crt_verify_restartable(
- chain,
- ca_chain, ca_crl,
- ssl->conf->cert_profile,
- ssl->hostname,
- &ssl->session_negotiate->verify_result,
- f_vrfy, p_vrfy, rs_ctx );
- }
-
- if( ret != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "x509_verify_cert", ret );
- }
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret == MBEDTLS_ERR_ECP_IN_PROGRESS )
- return( MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS );
-#endif
-
- /*
- * Secondary checks: always done, but change 'ret' only if it was 0
- */
-
-#if defined(MBEDTLS_ECP_C)
- {
- const mbedtls_pk_context *pk = &chain->pk;
-
- /* If certificate uses an EC key, make sure the curve is OK */
- if( mbedtls_pk_can_do( pk, MBEDTLS_PK_ECKEY ) &&
- mbedtls_ssl_check_curve( ssl, mbedtls_pk_ec( *pk )->grp.id ) != 0 )
- {
- ssl->session_negotiate->verify_result |= MBEDTLS_X509_BADCERT_BAD_KEY;
-
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (EC key curve)" ) );
- if( ret == 0 )
- ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
- }
- }
-#endif /* MBEDTLS_ECP_C */
-
- if( mbedtls_ssl_check_cert_usage( chain,
- ciphersuite_info,
- ! ssl->conf->endpoint,
- &ssl->session_negotiate->verify_result ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad certificate (usage extensions)" ) );
- if( ret == 0 )
- ret = MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE;
- }
-
- /* mbedtls_x509_crt_verify_with_profile is supposed to report a
- * verification failure through MBEDTLS_ERR_X509_CERT_VERIFY_FAILED,
- * with details encoded in the verification flags. All other kinds
- * of error codes, including those from the user provided f_vrfy
- * functions, are treated as fatal and lead to a failure of
- * ssl_parse_certificate even if verification was optional. */
- if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL &&
- ( ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED ||
- ret == MBEDTLS_ERR_SSL_BAD_HS_CERTIFICATE ) )
- {
- ret = 0;
- }
-
- if( have_ca_chain == 0 && authmode == MBEDTLS_SSL_VERIFY_REQUIRED )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "got no CA chain" ) );
- ret = MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED;
- }
-
- if( ret != 0 )
- {
- uint8_t alert;
-
- /* The certificate may have been rejected for several reasons.
- Pick one and send the corresponding alert. Which alert to send
- may be a subject of debate in some cases. */
- if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_OTHER )
- alert = MBEDTLS_SSL_ALERT_MSG_ACCESS_DENIED;
- else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_CN_MISMATCH )
- alert = MBEDTLS_SSL_ALERT_MSG_BAD_CERT;
- else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_KEY_USAGE )
- alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
- else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXT_KEY_USAGE )
- alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
- else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NS_CERT_TYPE )
- alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
- else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_PK )
- alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
- else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_BAD_KEY )
- alert = MBEDTLS_SSL_ALERT_MSG_UNSUPPORTED_CERT;
- else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_EXPIRED )
- alert = MBEDTLS_SSL_ALERT_MSG_CERT_EXPIRED;
- else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_REVOKED )
- alert = MBEDTLS_SSL_ALERT_MSG_CERT_REVOKED;
- else if( ssl->session_negotiate->verify_result & MBEDTLS_X509_BADCERT_NOT_TRUSTED )
- alert = MBEDTLS_SSL_ALERT_MSG_UNKNOWN_CA;
- else
- alert = MBEDTLS_SSL_ALERT_MSG_CERT_UNKNOWN;
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- alert );
- }
-
-#if defined(MBEDTLS_DEBUG_C)
- if( ssl->session_negotiate->verify_result != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "! Certificate verification flags %x",
- ssl->session_negotiate->verify_result ) );
- }
- else
- {
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "Certificate verification flags clear" ) );
- }
-#endif /* MBEDTLS_DEBUG_C */
-
- return( ret );
-}
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
-static int ssl_remember_peer_crt_digest( mbedtls_ssl_context *ssl,
- unsigned char *start, size_t len )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- /* Remember digest of the peer's end-CRT. */
- ssl->session_negotiate->peer_cert_digest =
- mbedtls_calloc( 1, MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN );
- if( ssl->session_negotiate->peer_cert_digest == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
- MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN ) );
- mbedtls_ssl_send_alert_message( ssl,
- MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
-
- return( MBEDTLS_ERR_SSL_ALLOC_FAILED );
- }
-
- ret = mbedtls_md( mbedtls_md_info_from_type(
- MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE ),
- start, len,
- ssl->session_negotiate->peer_cert_digest );
-
- ssl->session_negotiate->peer_cert_digest_type =
- MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_TYPE;
- ssl->session_negotiate->peer_cert_digest_len =
- MBEDTLS_SSL_PEER_CERT_DIGEST_DFL_LEN;
-
- return( ret );
-}
-
-static int ssl_remember_peer_pubkey( mbedtls_ssl_context *ssl,
- unsigned char *start, size_t len )
-{
- unsigned char *end = start + len;
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
- /* Make a copy of the peer's raw public key. */
- mbedtls_pk_init( &ssl->handshake->peer_pubkey );
- ret = mbedtls_pk_parse_subpubkey( &start, end,
- &ssl->handshake->peer_pubkey );
- if( ret != 0 )
- {
- /* We should have parsed the public key before. */
- return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
- }
-
- return( 0 );
-}
-#endif /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
-int mbedtls_ssl_parse_certificate( mbedtls_ssl_context *ssl )
-{
- int ret = 0;
- int crt_expected;
-#if defined(MBEDTLS_SSL_SRV_C) && defined(MBEDTLS_SSL_SERVER_NAME_INDICATION)
- const int authmode = ssl->handshake->sni_authmode != MBEDTLS_SSL_VERIFY_UNSET
- ? ssl->handshake->sni_authmode
- : ssl->conf->authmode;
-#else
- const int authmode = ssl->conf->authmode;
-#endif
- void *rs_ctx = NULL;
- mbedtls_x509_crt *chain = NULL;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse certificate" ) );
-
- crt_expected = ssl_parse_certificate_coordinate( ssl, authmode );
- if( crt_expected == SSL_CERTIFICATE_SKIP )
- {
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= skip parse certificate" ) );
- goto exit;
- }
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled &&
- ssl->handshake->ecrs_state == ssl_ecrs_crt_verify )
- {
- chain = ssl->handshake->ecrs_peer_cert;
- ssl->handshake->ecrs_peer_cert = NULL;
- goto crt_verify;
- }
-#endif
-
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- /* mbedtls_ssl_read_record may have sent an alert already. We
- let it decide whether to alert. */
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- goto exit;
- }
-
-#if defined(MBEDTLS_SSL_SRV_C)
- if( ssl_srv_check_client_no_crt_notification( ssl ) == 0 )
- {
- ssl->session_negotiate->verify_result = MBEDTLS_X509_BADCERT_MISSING;
-
- if( authmode == MBEDTLS_SSL_VERIFY_OPTIONAL )
- ret = 0;
- else
- ret = MBEDTLS_ERR_SSL_NO_CLIENT_CERTIFICATE;
-
- goto exit;
- }
-#endif /* MBEDTLS_SSL_SRV_C */
-
- /* Clear existing peer CRT structure in case we tried to
- * reuse a session but it failed, and allocate a new one. */
- ssl_clear_peer_cert( ssl->session_negotiate );
-
- chain = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) );
- if( chain == NULL )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed",
- sizeof( mbedtls_x509_crt ) ) );
- mbedtls_ssl_send_alert_message( ssl,
- MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_INTERNAL_ERROR );
-
- ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
- goto exit;
- }
- mbedtls_x509_crt_init( chain );
-
- ret = ssl_parse_certificate_chain( ssl, chain );
- if( ret != 0 )
- goto exit;
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ssl->handshake->ecrs_enabled)
- ssl->handshake->ecrs_state = ssl_ecrs_crt_verify;
-
-crt_verify:
- if( ssl->handshake->ecrs_enabled)
- rs_ctx = &ssl->handshake->ecrs_ctx;
-#endif
-
- ret = ssl_parse_certificate_verify( ssl, authmode,
- chain, rs_ctx );
- if( ret != 0 )
- goto exit;
-
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
- {
- unsigned char *crt_start, *pk_start;
- size_t crt_len, pk_len;
-
- /* We parse the CRT chain without copying, so
- * these pointers point into the input buffer,
- * and are hence still valid after freeing the
- * CRT chain. */
-
- crt_start = chain->raw.p;
- crt_len = chain->raw.len;
-
- pk_start = chain->pk_raw.p;
- pk_len = chain->pk_raw.len;
-
- /* Free the CRT structures before computing
- * digest and copying the peer's public key. */
- mbedtls_x509_crt_free( chain );
- mbedtls_free( chain );
- chain = NULL;
-
- ret = ssl_remember_peer_crt_digest( ssl, crt_start, crt_len );
- if( ret != 0 )
- goto exit;
-
- ret = ssl_remember_peer_pubkey( ssl, pk_start, pk_len );
- if( ret != 0 )
- goto exit;
- }
-#else /* !MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
- /* Pass ownership to session structure. */
- ssl->session_negotiate->peer_cert = chain;
- chain = NULL;
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse certificate" ) );
-
-exit:
-
- if( ret == 0 )
- ssl->state++;
-
-#if defined(MBEDTLS_SSL__ECP_RESTARTABLE)
- if( ret == MBEDTLS_ERR_SSL_CRYPTO_IN_PROGRESS )
- {
- ssl->handshake->ecrs_peer_cert = chain;
- chain = NULL;
- }
-#endif
-
- if( chain != NULL )
- {
- mbedtls_x509_crt_free( chain );
- mbedtls_free( chain );
- }
-
- return( ret );
-}
-#endif /* MBEDTLS_KEY_EXCHANGE__WITH_CERT__ENABLED */
void mbedtls_ssl_optimize_checksum( mbedtls_ssl_context *ssl,
const mbedtls_ssl_ciphersuite_t *ciphersuite_info )
@@ -3372,209 +2503,6 @@
MBEDTLS_SSL_DEBUG_MSG( 3, ( "<= handshake wrapup" ) );
}
-int mbedtls_ssl_write_finished( mbedtls_ssl_context *ssl )
-{
- int ret, hash_len;
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write finished" ) );
-
- mbedtls_ssl_update_out_pointers( ssl, ssl->transform_negotiate );
-
- ssl->handshake->calc_finished( ssl, ssl->out_msg + 4, ssl->conf->endpoint );
-
- /*
- * RFC 5246 7.4.9 (Page 63) says 12 is the default length and ciphersuites
- * may define some other value. Currently (early 2016), no defined
- * ciphersuite does this (and this is unlikely to change as activity has
- * moved to TLS 1.3 now) so we can keep the hardcoded 12 here.
- */
- hash_len = ( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 ) ? 36 : 12;
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- ssl->verify_data_len = hash_len;
- memcpy( ssl->own_verify_data, ssl->out_msg + 4, hash_len );
-#endif
-
- ssl->out_msglen = 4 + hash_len;
- ssl->out_msgtype = MBEDTLS_SSL_MSG_HANDSHAKE;
- ssl->out_msg[0] = MBEDTLS_SSL_HS_FINISHED;
-
- /*
- * In case of session resuming, invert the client and server
- * ChangeCipherSpec messages order.
- */
- if( ssl->handshake->resume != 0 )
- {
-#if defined(MBEDTLS_SSL_CLI_C)
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
- ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
-#endif
-#if defined(MBEDTLS_SSL_SRV_C)
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
- ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC;
-#endif
- }
- else
- ssl->state++;
-
- /*
- * Switch to our negotiated transform and session parameters for outbound
- * data.
- */
- MBEDTLS_SSL_DEBUG_MSG( 3, ( "switching to new transform spec for outbound data" ) );
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- {
- unsigned char i;
-
- /* Remember current epoch settings for resending */
- ssl->handshake->alt_transform_out = ssl->transform_out;
- memcpy( ssl->handshake->alt_out_ctr, ssl->cur_out_ctr, 8 );
-
- /* Set sequence_number to zero */
- memset( ssl->cur_out_ctr + 2, 0, 6 );
-
- /* Increment epoch */
- for( i = 2; i > 0; i-- )
- if( ++ssl->cur_out_ctr[i - 1] != 0 )
- break;
-
- /* The loop goes to its end iff the counter is wrapping */
- if( i == 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "DTLS epoch would wrap" ) );
- return( MBEDTLS_ERR_SSL_COUNTER_WRAPPING );
- }
- }
- else
-#endif /* MBEDTLS_SSL_PROTO_DTLS */
- memset( ssl->cur_out_ctr, 0, 8 );
-
- ssl->transform_out = ssl->transform_negotiate;
- ssl->session_out = ssl->session_negotiate;
-
-#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
- if( mbedtls_ssl_hw_record_activate != NULL )
- {
- if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
- return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
- }
- }
-#endif
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- mbedtls_ssl_send_flight_completed( ssl );
-#endif
-
- if( ( ret = mbedtls_ssl_write_handshake_msg( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_write_handshake_msg", ret );
- return( ret );
- }
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
- ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret );
- return( ret );
- }
-#endif
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write finished" ) );
-
- return( 0 );
-}
-
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
-#define SSL_MAX_HASH_LEN 36
-#else
-#define SSL_MAX_HASH_LEN 12
-#endif
-
-int mbedtls_ssl_parse_finished( mbedtls_ssl_context *ssl )
-{
- int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
- unsigned int hash_len;
- unsigned char buf[SSL_MAX_HASH_LEN];
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> parse finished" ) );
-
- ssl->handshake->calc_finished( ssl, buf, ssl->conf->endpoint ^ 1 );
-
- if( ( ret = mbedtls_ssl_read_record( ssl, 1 ) ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_read_record", ret );
- return( ret );
- }
-
- if( ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE );
- return( MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE );
- }
-
- /* There is currently no ciphersuite using another length with TLS 1.2 */
-#if defined(MBEDTLS_SSL_PROTO_SSL3)
- if( ssl->minor_ver == MBEDTLS_SSL_MINOR_VERSION_0 )
- hash_len = 36;
- else
-#endif
- hash_len = 12;
-
- if( ssl->in_msg[0] != MBEDTLS_SSL_HS_FINISHED ||
- ssl->in_hslen != mbedtls_ssl_hs_hdr_len( ssl ) + hash_len )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
- }
-
- if( mbedtls_ssl_safer_memcmp( ssl->in_msg + mbedtls_ssl_hs_hdr_len( ssl ),
- buf, hash_len ) != 0 )
- {
- MBEDTLS_SSL_DEBUG_MSG( 1, ( "bad finished message" ) );
- mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
- MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR );
- return( MBEDTLS_ERR_SSL_BAD_HS_FINISHED );
- }
-
-#if defined(MBEDTLS_SSL_RENEGOTIATION)
- ssl->verify_data_len = hash_len;
- memcpy( ssl->peer_verify_data, buf, hash_len );
-#endif
-
- if( ssl->handshake->resume != 0 )
- {
-#if defined(MBEDTLS_SSL_CLI_C)
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT )
- ssl->state = MBEDTLS_SSL_CLIENT_CHANGE_CIPHER_SPEC;
-#endif
-#if defined(MBEDTLS_SSL_SRV_C)
- if( ssl->conf->endpoint == MBEDTLS_SSL_IS_SERVER )
- ssl->state = MBEDTLS_SSL_HANDSHAKE_WRAPUP;
-#endif
- }
- else
- ssl->state++;
-
-#if defined(MBEDTLS_SSL_PROTO_DTLS)
- if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM )
- mbedtls_ssl_recv_flight_completed( ssl );
-#endif
-
- MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= parse finished" ) );
-
- return( 0 );
-}
-
static void ssl_handshake_params_init( mbedtls_ssl_handshake_params *handshake )
{
memset( handshake, 0, sizeof( mbedtls_ssl_handshake_params ) );
@@ -5696,9 +4624,10 @@
if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
- if( ( ret = ssl_start_renegotiation( ssl ) ) != 0 )
+ if( ( ret = mbedtls_ssl_start_renegotiation( ssl ) ) != 0 )
{
- MBEDTLS_SSL_DEBUG_RET( 1, "ssl_start_renegotiation", ret );
+ MBEDTLS_SSL_DEBUG_RET( 1,
+ "mbedtls_ssl_start_renegotiation", ret );
return( ret );
}
}
@@ -5871,7 +4800,7 @@
return;
#if defined(MBEDTLS_X509_CRT_PARSE_C)
- ssl_clear_peer_cert( session );
+ mbedtls_ssl_clear_peer_cert( session );
#endif
#if defined(MBEDTLS_SSL_SESSION_TICKETS) && defined(MBEDTLS_SSL_CLI_C)
