1 /* $OpenBSD: kex.h,v 1.35 2004/06/13 12:53:24 djm Exp $ */
4 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <openssl/evp.h>
34 #define KEX_DH1 "diffie-hellman-group1-sha1"
35 #define KEX_DH14 "diffie-hellman-group14-sha1"
36 #define KEX_DHGEX "diffie-hellman-group-exchange-sha1"
38 enum kex_init_proposals {
40 PROPOSAL_SERVER_HOST_KEY_ALGS,
41 PROPOSAL_ENC_ALGS_CTOS,
42 PROPOSAL_ENC_ALGS_STOC,
43 PROPOSAL_MAC_ALGS_CTOS,
44 PROPOSAL_MAC_ALGS_STOC,
45 PROPOSAL_COMP_ALGS_CTOS,
46 PROPOSAL_COMP_ALGS_STOC,
65 #define KEX_INIT_SENT 0x0001
67 typedef struct Kex Kex;
68 typedef struct Mac Mac;
69 typedef struct Comp Comp;
70 typedef struct Enc Enc;
71 typedef struct Newkeys Newkeys;
102 u_int session_id_len;
103 Newkeys *newkeys[MODE_MAX];
113 char *client_version_string;
114 char *server_version_string;
115 int (*verify_host_key)(Key *);
116 Key *(*load_host_key)(int);
117 int (*host_key_index)(Key *);
118 void (*kex[KEX_MAX])(Kex *);
121 Kex *kex_setup(char *[PROPOSAL_MAX]);
122 void kex_finish(Kex *);
124 void kex_send_kexinit(Kex *);
125 void kex_input_kexinit(int, u_int32_t, void *);
126 void kex_derive_keys(Kex *, u_char *, BIGNUM *);
128 Newkeys *kex_get_newkeys(int);
130 void kexdh_client(Kex *);
131 void kexdh_server(Kex *);
132 void kexgex_client(Kex *);
133 void kexgex_server(Kex *);
136 kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
137 BIGNUM *, BIGNUM *, BIGNUM *);
139 kexgex_hash(char *, char *, char *, int, char *, int, u_char *, int,
140 int, int, int, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *);
143 derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]);
145 #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
146 void dump_digest(char *, u_char *, int);