| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 2012 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al. |
| * Copyright (C) 2012, 2011, Markus Moeller, <markus_moeller@compuserve.com> |
| * |
| * This software is licensed as described in the file COPYING, which |
| * you should have received as part of this distribution. The terms |
| * are also available at https://curl.se/docs/copyright.html. |
| * |
| * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| * copies of the Software, and permit persons to whom the Software is |
| * furnished to do so, under the terms of the COPYING file. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| * SPDX-License-Identifier: curl |
| * |
| ***************************************************************************/ |
| |
| #include "curl_setup.h" |
| |
| #if defined(USE_WINDOWS_SSPI) && !defined(CURL_DISABLE_PROXY) |
| |
| #include "urldata.h" |
| #include "sendf.h" |
| #include "connect.h" |
| #include "strerror.h" |
| #include "timeval.h" |
| #include "socks.h" |
| #include "curl_sspi.h" |
| #include "curl_multibyte.h" |
| #include "warnless.h" |
| #include "strdup.h" |
| /* The last 3 #include files should be in this order */ |
| #include "curl_printf.h" |
| #include "curl_memory.h" |
| #include "memdebug.h" |
| |
| /* |
| * Helper sspi error functions. |
| */ |
| static int check_sspi_err(struct Curl_easy *data, |
| SECURITY_STATUS status, |
| const char *function) |
| { |
| if(status != SEC_E_OK && |
| status != SEC_I_COMPLETE_AND_CONTINUE && |
| status != SEC_I_COMPLETE_NEEDED && |
| status != SEC_I_CONTINUE_NEEDED) { |
| char buffer[STRERROR_LEN]; |
| failf(data, "SSPI error: %s failed: %s", function, |
| Curl_sspi_strerror(status, buffer, sizeof(buffer))); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* This is the SSPI-using version of this function */ |
| CURLcode Curl_SOCKS5_gssapi_negotiate(int sockindex, |
| struct Curl_easy *data) |
| { |
| struct connectdata *conn = data->conn; |
| curl_socket_t sock = conn->sock[sockindex]; |
| CURLcode code; |
| ssize_t actualread; |
| ssize_t written; |
| int result; |
| /* Needs GSS-API authentication */ |
| SECURITY_STATUS status; |
| unsigned long sspi_ret_flags = 0; |
| unsigned char gss_enc; |
| SecBuffer sspi_send_token, sspi_recv_token, sspi_w_token[3]; |
| SecBufferDesc input_desc, output_desc, wrap_desc; |
| SecPkgContext_Sizes sspi_sizes; |
| CredHandle cred_handle; |
| CtxtHandle sspi_context; |
| PCtxtHandle context_handle = NULL; |
| SecPkgCredentials_Names names; |
| TimeStamp expiry; |
| char *service_name = NULL; |
| unsigned short us_length; |
| unsigned long qop; |
| unsigned char socksreq[4]; /* room for GSS-API exchange header only */ |
| const char *service = data->set.str[STRING_PROXY_SERVICE_NAME] ? |
| data->set.str[STRING_PROXY_SERVICE_NAME] : "rcmd"; |
| const size_t service_length = strlen(service); |
| |
| /* GSS-API request looks like |
| * +----+------+-----+----------------+ |
| * |VER | MTYP | LEN | TOKEN | |
| * +----+------+----------------------+ |
| * | 1 | 1 | 2 | up to 2^16 - 1 | |
| * +----+------+-----+----------------+ |
| */ |
| |
| /* prepare service name */ |
| if(strchr(service, '/')) { |
| service_name = strdup(service); |
| if(!service_name) |
| return CURLE_OUT_OF_MEMORY; |
| } |
| else { |
| service_name = malloc(service_length + |
| strlen(conn->socks_proxy.host.name) + 2); |
| if(!service_name) |
| return CURLE_OUT_OF_MEMORY; |
| msnprintf(service_name, service_length + |
| strlen(conn->socks_proxy.host.name) + 2, "%s/%s", |
| service, conn->socks_proxy.host.name); |
| } |
| |
| input_desc.cBuffers = 1; |
| input_desc.pBuffers = &sspi_recv_token; |
| input_desc.ulVersion = SECBUFFER_VERSION; |
| |
| sspi_recv_token.BufferType = SECBUFFER_TOKEN; |
| sspi_recv_token.cbBuffer = 0; |
| sspi_recv_token.pvBuffer = NULL; |
| |
| output_desc.cBuffers = 1; |
| output_desc.pBuffers = &sspi_send_token; |
| output_desc.ulVersion = SECBUFFER_VERSION; |
| |
| sspi_send_token.BufferType = SECBUFFER_TOKEN; |
| sspi_send_token.cbBuffer = 0; |
| sspi_send_token.pvBuffer = NULL; |
| |
| wrap_desc.cBuffers = 3; |
| wrap_desc.pBuffers = sspi_w_token; |
| wrap_desc.ulVersion = SECBUFFER_VERSION; |
| |
| cred_handle.dwLower = 0; |
| cred_handle.dwUpper = 0; |
| |
| status = s_pSecFn->AcquireCredentialsHandle(NULL, |
| (TCHAR *) TEXT("Kerberos"), |
| SECPKG_CRED_OUTBOUND, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| &cred_handle, |
| &expiry); |
| |
| if(check_sspi_err(data, status, "AcquireCredentialsHandle")) { |
| failf(data, "Failed to acquire credentials."); |
| free(service_name); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| (void)curlx_nonblock(sock, FALSE); |
| |
| /* As long as we need to keep sending some context info, and there's no */ |
| /* errors, keep sending it... */ |
| for(;;) { |
| TCHAR *sname; |
| |
| sname = curlx_convert_UTF8_to_tchar(service_name); |
| if(!sname) |
| return CURLE_OUT_OF_MEMORY; |
| |
| status = s_pSecFn->InitializeSecurityContext(&cred_handle, |
| context_handle, |
| sname, |
| ISC_REQ_MUTUAL_AUTH | |
| ISC_REQ_ALLOCATE_MEMORY | |
| ISC_REQ_CONFIDENTIALITY | |
| ISC_REQ_REPLAY_DETECT, |
| 0, |
| SECURITY_NATIVE_DREP, |
| &input_desc, |
| 0, |
| &sspi_context, |
| &output_desc, |
| &sspi_ret_flags, |
| &expiry); |
| |
| curlx_unicodefree(sname); |
| |
| if(sspi_recv_token.pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| sspi_recv_token.pvBuffer = NULL; |
| sspi_recv_token.cbBuffer = 0; |
| } |
| |
| if(check_sspi_err(data, status, "InitializeSecurityContext")) { |
| free(service_name); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| if(sspi_recv_token.pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| failf(data, "Failed to initialise security context."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(sspi_send_token.cbBuffer) { |
| socksreq[0] = 1; /* GSS-API subnegotiation version */ |
| socksreq[1] = 1; /* authentication message type */ |
| us_length = htons((short)sspi_send_token.cbBuffer); |
| memcpy(socksreq + 2, &us_length, sizeof(short)); |
| |
| code = Curl_write_plain(data, sock, (char *)socksreq, 4, &written); |
| if(code || (4 != written)) { |
| failf(data, "Failed to send SSPI authentication request."); |
| free(service_name); |
| if(sspi_send_token.pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| if(sspi_recv_token.pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| code = Curl_write_plain(data, sock, (char *)sspi_send_token.pvBuffer, |
| sspi_send_token.cbBuffer, &written); |
| if(code || (sspi_send_token.cbBuffer != (size_t)written)) { |
| failf(data, "Failed to send SSPI authentication token."); |
| free(service_name); |
| if(sspi_send_token.pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| if(sspi_recv_token.pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| } |
| |
| if(sspi_send_token.pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| sspi_send_token.pvBuffer = NULL; |
| } |
| sspi_send_token.cbBuffer = 0; |
| |
| if(sspi_recv_token.pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| sspi_recv_token.pvBuffer = NULL; |
| } |
| sspi_recv_token.cbBuffer = 0; |
| |
| if(status != SEC_I_CONTINUE_NEEDED) |
| break; |
| |
| /* analyse response */ |
| |
| /* GSS-API response looks like |
| * +----+------+-----+----------------+ |
| * |VER | MTYP | LEN | TOKEN | |
| * +----+------+----------------------+ |
| * | 1 | 1 | 2 | up to 2^16 - 1 | |
| * +----+------+-----+----------------+ |
| */ |
| |
| result = Curl_blockread_all(data, sock, (char *)socksreq, 4, &actualread); |
| if(result || (actualread != 4)) { |
| failf(data, "Failed to receive SSPI authentication response."); |
| free(service_name); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| /* ignore the first (VER) byte */ |
| if(socksreq[1] == 255) { /* status / message type */ |
| failf(data, "User was rejected by the SOCKS5 server (%u %u).", |
| (unsigned int)socksreq[0], (unsigned int)socksreq[1]); |
| free(service_name); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(socksreq[1] != 1) { /* status / message type */ |
| failf(data, "Invalid SSPI authentication response type (%u %u).", |
| (unsigned int)socksreq[0], (unsigned int)socksreq[1]); |
| free(service_name); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| memcpy(&us_length, socksreq + 2, sizeof(short)); |
| us_length = ntohs(us_length); |
| |
| sspi_recv_token.cbBuffer = us_length; |
| sspi_recv_token.pvBuffer = malloc(us_length); |
| |
| if(!sspi_recv_token.pvBuffer) { |
| free(service_name); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| result = Curl_blockread_all(data, sock, (char *)sspi_recv_token.pvBuffer, |
| sspi_recv_token.cbBuffer, &actualread); |
| |
| if(result || (actualread != us_length)) { |
| failf(data, "Failed to receive SSPI authentication token."); |
| free(service_name); |
| if(sspi_recv_token.pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| context_handle = &sspi_context; |
| } |
| |
| free(service_name); |
| |
| /* Everything is good so far, user was authenticated! */ |
| status = s_pSecFn->QueryCredentialsAttributes(&cred_handle, |
| SECPKG_CRED_ATTR_NAMES, |
| &names); |
| s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| if(check_sspi_err(data, status, "QueryCredentialAttributes")) { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| s_pSecFn->FreeContextBuffer(names.sUserName); |
| failf(data, "Failed to determine user name."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| infof(data, "SOCKS5 server authenticated user %s with GSS-API.", |
| names.sUserName); |
| s_pSecFn->FreeContextBuffer(names.sUserName); |
| |
| /* Do encryption */ |
| socksreq[0] = 1; /* GSS-API subnegotiation version */ |
| socksreq[1] = 2; /* encryption message type */ |
| |
| gss_enc = 0; /* no data protection */ |
| /* do confidentiality protection if supported */ |
| if(sspi_ret_flags & ISC_REQ_CONFIDENTIALITY) |
| gss_enc = 2; |
| /* else do integrity protection */ |
| else if(sspi_ret_flags & ISC_REQ_INTEGRITY) |
| gss_enc = 1; |
| |
| infof(data, "SOCKS5 server supports GSS-API %s data protection.", |
| (gss_enc == 0)?"no":((gss_enc == 1)?"integrity":"confidentiality") ); |
| /* force to no data protection, avoid encryption/decryption for now */ |
| gss_enc = 0; |
| /* |
| * Sending the encryption type in clear seems wrong. It should be |
| * protected with gss_seal()/gss_wrap(). See RFC1961 extract below |
| * The NEC reference implementations on which this is based is |
| * therefore at fault |
| * |
| * +------+------+------+.......................+ |
| * + ver | mtyp | len | token | |
| * +------+------+------+.......................+ |
| * + 0x01 | 0x02 | 0x02 | up to 2^16 - 1 octets | |
| * +------+------+------+.......................+ |
| * |
| * Where: |
| * |
| * - "ver" is the protocol version number, here 1 to represent the |
| * first version of the SOCKS/GSS-API protocol |
| * |
| * - "mtyp" is the message type, here 2 to represent a protection |
| * -level negotiation message |
| * |
| * - "len" is the length of the "token" field in octets |
| * |
| * - "token" is the GSS-API encapsulated protection level |
| * |
| * The token is produced by encapsulating an octet containing the |
| * required protection level using gss_seal()/gss_wrap() with conf_req |
| * set to FALSE. The token is verified using gss_unseal()/ |
| * gss_unwrap(). |
| * |
| */ |
| |
| if(data->set.socks5_gssapi_nec) { |
| us_length = htons((short)1); |
| memcpy(socksreq + 2, &us_length, sizeof(short)); |
| } |
| else { |
| status = s_pSecFn->QueryContextAttributes(&sspi_context, |
| SECPKG_ATTR_SIZES, |
| &sspi_sizes); |
| if(check_sspi_err(data, status, "QueryContextAttributes")) { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| failf(data, "Failed to query security context attributes."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| sspi_w_token[0].cbBuffer = sspi_sizes.cbSecurityTrailer; |
| sspi_w_token[0].BufferType = SECBUFFER_TOKEN; |
| sspi_w_token[0].pvBuffer = malloc(sspi_sizes.cbSecurityTrailer); |
| |
| if(!sspi_w_token[0].pvBuffer) { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| |
| sspi_w_token[1].cbBuffer = 1; |
| sspi_w_token[1].pvBuffer = malloc(1); |
| if(!sspi_w_token[1].pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| |
| memcpy(sspi_w_token[1].pvBuffer, &gss_enc, 1); |
| sspi_w_token[2].BufferType = SECBUFFER_PADDING; |
| sspi_w_token[2].cbBuffer = sspi_sizes.cbBlockSize; |
| sspi_w_token[2].pvBuffer = malloc(sspi_sizes.cbBlockSize); |
| if(!sspi_w_token[2].pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| status = s_pSecFn->EncryptMessage(&sspi_context, |
| KERB_WRAP_NO_ENCRYPT, |
| &wrap_desc, |
| 0); |
| if(check_sspi_err(data, status, "EncryptMessage")) { |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| failf(data, "Failed to query security context attributes."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| sspi_send_token.cbBuffer = sspi_w_token[0].cbBuffer |
| + sspi_w_token[1].cbBuffer |
| + sspi_w_token[2].cbBuffer; |
| sspi_send_token.pvBuffer = malloc(sspi_send_token.cbBuffer); |
| if(!sspi_send_token.pvBuffer) { |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| |
| memcpy(sspi_send_token.pvBuffer, sspi_w_token[0].pvBuffer, |
| sspi_w_token[0].cbBuffer); |
| memcpy((PUCHAR) sspi_send_token.pvBuffer +(int)sspi_w_token[0].cbBuffer, |
| sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer); |
| memcpy((PUCHAR) sspi_send_token.pvBuffer |
| + sspi_w_token[0].cbBuffer |
| + sspi_w_token[1].cbBuffer, |
| sspi_w_token[2].pvBuffer, sspi_w_token[2].cbBuffer); |
| |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| sspi_w_token[0].pvBuffer = NULL; |
| sspi_w_token[0].cbBuffer = 0; |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| sspi_w_token[1].pvBuffer = NULL; |
| sspi_w_token[1].cbBuffer = 0; |
| s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer); |
| sspi_w_token[2].pvBuffer = NULL; |
| sspi_w_token[2].cbBuffer = 0; |
| |
| us_length = htons((short)sspi_send_token.cbBuffer); |
| memcpy(socksreq + 2, &us_length, sizeof(short)); |
| } |
| |
| code = Curl_write_plain(data, sock, (char *)socksreq, 4, &written); |
| if(code || (4 != written)) { |
| failf(data, "Failed to send SSPI encryption request."); |
| if(sspi_send_token.pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(data->set.socks5_gssapi_nec) { |
| memcpy(socksreq, &gss_enc, 1); |
| code = Curl_write_plain(data, sock, (char *)socksreq, 1, &written); |
| if(code || (1 != written)) { |
| failf(data, "Failed to send SSPI encryption type."); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| } |
| else { |
| code = Curl_write_plain(data, sock, (char *)sspi_send_token.pvBuffer, |
| sspi_send_token.cbBuffer, &written); |
| if(code || (sspi_send_token.cbBuffer != (size_t)written)) { |
| failf(data, "Failed to send SSPI encryption type."); |
| if(sspi_send_token.pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| if(sspi_send_token.pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| } |
| |
| result = Curl_blockread_all(data, sock, (char *)socksreq, 4, &actualread); |
| if(result || (actualread != 4)) { |
| failf(data, "Failed to receive SSPI encryption response."); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| /* ignore the first (VER) byte */ |
| if(socksreq[1] == 255) { /* status / message type */ |
| failf(data, "User was rejected by the SOCKS5 server (%u %u).", |
| (unsigned int)socksreq[0], (unsigned int)socksreq[1]); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(socksreq[1] != 2) { /* status / message type */ |
| failf(data, "Invalid SSPI encryption response type (%u %u).", |
| (unsigned int)socksreq[0], (unsigned int)socksreq[1]); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| memcpy(&us_length, socksreq + 2, sizeof(short)); |
| us_length = ntohs(us_length); |
| |
| sspi_w_token[0].cbBuffer = us_length; |
| sspi_w_token[0].pvBuffer = malloc(us_length); |
| if(!sspi_w_token[0].pvBuffer) { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_OUT_OF_MEMORY; |
| } |
| |
| result = Curl_blockread_all(data, sock, (char *)sspi_w_token[0].pvBuffer, |
| sspi_w_token[0].cbBuffer, &actualread); |
| |
| if(result || (actualread != us_length)) { |
| failf(data, "Failed to receive SSPI encryption type."); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| |
| if(!data->set.socks5_gssapi_nec) { |
| wrap_desc.cBuffers = 2; |
| sspi_w_token[0].BufferType = SECBUFFER_STREAM; |
| sspi_w_token[1].BufferType = SECBUFFER_DATA; |
| sspi_w_token[1].cbBuffer = 0; |
| sspi_w_token[1].pvBuffer = NULL; |
| |
| status = s_pSecFn->DecryptMessage(&sspi_context, |
| &wrap_desc, |
| 0, |
| &qop); |
| |
| if(check_sspi_err(data, status, "DecryptMessage")) { |
| if(sspi_w_token[0].pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| if(sspi_w_token[1].pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| failf(data, "Failed to query security context attributes."); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| if(sspi_w_token[1].cbBuffer != 1) { |
| failf(data, "Invalid SSPI encryption response length (%lu).", |
| (unsigned long)sspi_w_token[1].cbBuffer); |
| if(sspi_w_token[0].pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| if(sspi_w_token[1].pvBuffer) |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| |
| memcpy(socksreq, sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| } |
| else { |
| if(sspi_w_token[0].cbBuffer != 1) { |
| failf(data, "Invalid SSPI encryption response length (%lu).", |
| (unsigned long)sspi_w_token[0].cbBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| return CURLE_COULDNT_CONNECT; |
| } |
| memcpy(socksreq, sspi_w_token[0].pvBuffer, sspi_w_token[0].cbBuffer); |
| s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| } |
| (void)curlx_nonblock(sock, TRUE); |
| |
| infof(data, "SOCKS5 access with%s protection granted.", |
| (socksreq[0] == 0)?"out GSS-API data": |
| ((socksreq[0] == 1)?" GSS-API integrity":" GSS-API confidentiality")); |
| |
| /* For later use if encryption is required |
| conn->socks5_gssapi_enctype = socksreq[0]; |
| if(socksreq[0] != 0) |
| conn->socks5_sspi_context = sspi_context; |
| else { |
| s_pSecFn->DeleteSecurityContext(&sspi_context); |
| conn->socks5_sspi_context = sspi_context; |
| } |
| */ |
| return CURLE_OK; |
| } |
| #endif |
