| /* |
| * Dropbear - a SSH2 server |
| * |
| * Copyright (c) 2002,2003 Matt Johnston |
| * All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. */ |
| |
| #ifndef DROPBEAR_KEX_H_ |
| #define DROPBEAR_KEX_H_ |
| |
| #include "includes.h" |
| #include "algo.h" |
| #include "signkey.h" |
| |
| void send_msg_kexinit(); |
| void recv_msg_kexinit(); |
| void send_msg_newkeys(); |
| void recv_msg_newkeys(); |
| void kexfirstinitialise(); |
| |
| struct kex_dh_param *gen_kexdh_param(); |
| void free_kexdh_param(struct kex_dh_param *param); |
| void kexdh_comb_key(struct kex_dh_param *param, mp_int *dh_pub_them, |
| sign_key *hostkey); |
| |
| #ifdef DROPBEAR_ECDH |
| struct kex_ecdh_param *gen_kexecdh_param(); |
| void free_kexecdh_param(struct kex_ecdh_param *param); |
| void kexecdh_comb_key(struct kex_ecdh_param *param, buffer *pub_them, |
| sign_key *hostkey); |
| #endif |
| |
| #ifdef DROPBEAR_CURVE25519 |
| struct kex_curve25519_param *gen_kexcurve25519_param(); |
| void free_kexcurve25519_param(struct kex_curve25519_param *param); |
| void kexcurve25519_comb_key(struct kex_curve25519_param *param, buffer *pub_them, |
| sign_key *hostkey); |
| #endif |
| |
| #ifndef DISABLE_ZLIB |
| int is_compress_trans(); |
| int is_compress_recv(); |
| #endif |
| |
| void recv_msg_kexdh_init(); /* server */ |
| |
| void send_msg_kexdh_init(); /* client */ |
| void recv_msg_kexdh_reply(); /* client */ |
| |
| struct KEXState { |
| |
| unsigned sentkexinit : 1; /*set when we've sent/recv kexinit packet */ |
| unsigned recvkexinit : 1; |
| unsigned them_firstfollows : 1; /* true when first_kex_packet_follows is set */ |
| unsigned sentnewkeys : 1; /* set once we've send MSG_NEWKEYS (will be cleared once we have also received */ |
| unsigned recvnewkeys : 1; /* set once we've received MSG_NEWKEYS (cleared once we have also sent */ |
| |
| unsigned donefirstkex : 1; /* Set to 1 after the first kex has completed, |
| ie the transport layer has been set up */ |
| |
| unsigned our_first_follows_matches : 1; |
| |
| time_t lastkextime; /* time of the last kex */ |
| unsigned int datatrans; /* data transmitted since last kex */ |
| unsigned int datarecv; /* data received since last kex */ |
| |
| }; |
| |
| #define DH_P_1_LEN 128 |
| extern const unsigned char dh_p_1[DH_P_1_LEN]; |
| #define DH_P_14_LEN 256 |
| extern const unsigned char dh_p_14[DH_P_14_LEN]; |
| |
| struct kex_dh_param { |
| mp_int pub; /* e */ |
| mp_int priv; /* x */ |
| }; |
| |
| #ifdef DROPBEAR_ECDH |
| struct kex_ecdh_param { |
| ecc_key key; |
| }; |
| #endif |
| |
| #ifdef DROPBEAR_CURVE25519 |
| #define CURVE25519_LEN 32 |
| struct kex_curve25519_param { |
| unsigned char priv[CURVE25519_LEN]; |
| unsigned char pub[CURVE25519_LEN]; |
| }; |
| |
| /* No header file for curve25519_donna */ |
| int curve25519_donna(unsigned char *out, const unsigned char *secret, const unsigned char *other); |
| #endif |
| |
| |
| #define MAX_KEXHASHBUF 2000 |
| |
| #endif /* DROPBEAR_KEX_H_ */ |