]>
Commit | Line | Data |
---|---|---|
2ce0bfe4 | 1 | /* $OpenBSD: kex.h,v 1.37 2005/07/25 11:59:39 markus Exp $ */ |
3c0ef626 | 2 | |
3 | /* | |
4 | * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
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. | |
14 | * | |
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. | |
25 | */ | |
26 | #ifndef KEX_H | |
27 | #define KEX_H | |
28 | ||
29 | #include <openssl/evp.h> | |
30 | #include "buffer.h" | |
31 | #include "cipher.h" | |
32 | #include "key.h" | |
33 | ||
34 | #define KEX_DH1 "diffie-hellman-group1-sha1" | |
7e82606e | 35 | #define KEX_DH14 "diffie-hellman-group14-sha1" |
3c0ef626 | 36 | #define KEX_DHGEX "diffie-hellman-group-exchange-sha1" |
37 | ||
2ce0bfe4 | 38 | #define COMP_NONE 0 |
39 | #define COMP_ZLIB 1 | |
40 | #define COMP_DELAYED 2 | |
41 | ||
3c0ef626 | 42 | enum kex_init_proposals { |
43 | PROPOSAL_KEX_ALGS, | |
44 | PROPOSAL_SERVER_HOST_KEY_ALGS, | |
45 | PROPOSAL_ENC_ALGS_CTOS, | |
46 | PROPOSAL_ENC_ALGS_STOC, | |
47 | PROPOSAL_MAC_ALGS_CTOS, | |
48 | PROPOSAL_MAC_ALGS_STOC, | |
49 | PROPOSAL_COMP_ALGS_CTOS, | |
50 | PROPOSAL_COMP_ALGS_STOC, | |
51 | PROPOSAL_LANG_CTOS, | |
52 | PROPOSAL_LANG_STOC, | |
53 | PROPOSAL_MAX | |
54 | }; | |
55 | ||
56 | enum kex_modes { | |
57 | MODE_IN, | |
58 | MODE_OUT, | |
59 | MODE_MAX | |
60 | }; | |
61 | ||
62 | enum kex_exchange { | |
8afc6a66 | 63 | KEX_DH_GRP1_SHA1, |
7e82606e | 64 | KEX_DH_GRP14_SHA1, |
8afc6a66 | 65 | KEX_DH_GEX_SHA1, |
66 | KEX_GSS_GRP1_SHA1, | |
67 | KEX_MAX | |
3c0ef626 | 68 | }; |
69 | ||
70 | #define KEX_INIT_SENT 0x0001 | |
71 | ||
72 | typedef struct Kex Kex; | |
73 | typedef struct Mac Mac; | |
74 | typedef struct Comp Comp; | |
75 | typedef struct Enc Enc; | |
76 | typedef struct Newkeys Newkeys; | |
77 | ||
78 | struct Enc { | |
79 | char *name; | |
80 | Cipher *cipher; | |
81 | int enabled; | |
e9702f7d | 82 | u_int key_len; |
83 | u_int block_size; | |
3c0ef626 | 84 | u_char *key; |
85 | u_char *iv; | |
86 | }; | |
87 | struct Mac { | |
88 | char *name; | |
89 | int enabled; | |
44a053a3 | 90 | const EVP_MD *md; |
2ce0bfe4 | 91 | u_int mac_len; |
3c0ef626 | 92 | u_char *key; |
2ce0bfe4 | 93 | u_int key_len; |
3c0ef626 | 94 | }; |
95 | struct Comp { | |
96 | int type; | |
97 | int enabled; | |
98 | char *name; | |
99 | }; | |
100 | struct Newkeys { | |
101 | Enc enc; | |
102 | Mac mac; | |
103 | Comp comp; | |
104 | }; | |
5598e598 | 105 | |
106 | struct KexOptions { | |
107 | int gss_deleg_creds; | |
108 | }; | |
109 | ||
3c0ef626 | 110 | struct Kex { |
111 | u_char *session_id; | |
d03f4262 | 112 | u_int session_id_len; |
3c0ef626 | 113 | Newkeys *newkeys[MODE_MAX]; |
2ce0bfe4 | 114 | u_int we_need; |
3c0ef626 | 115 | int server; |
116 | char *name; | |
117 | int hostkey_type; | |
118 | int kex_type; | |
119 | Buffer my; | |
120 | Buffer peer; | |
121 | int done; | |
122 | int flags; | |
123 | char *client_version_string; | |
124 | char *server_version_string; | |
23987cb8 | 125 | struct KexOptions options; |
3c0ef626 | 126 | int (*verify_host_key)(Key *); |
127 | Key *(*load_host_key)(int); | |
350391c5 | 128 | int (*host_key_index)(Key *); |
8afc6a66 | 129 | void (*kex[KEX_MAX])(Kex *); |
3c0ef626 | 130 | }; |
131 | ||
132 | Kex *kex_setup(char *[PROPOSAL_MAX]); | |
133 | void kex_finish(Kex *); | |
134 | ||
135 | void kex_send_kexinit(Kex *); | |
e9702f7d | 136 | void kex_input_kexinit(int, u_int32_t, void *); |
3c0ef626 | 137 | void kex_derive_keys(Kex *, u_char *, BIGNUM *); |
138 | ||
8afc6a66 | 139 | Newkeys *kex_get_newkeys(int); |
140 | ||
141 | void kexdh_client(Kex *); | |
142 | void kexdh_server(Kex *); | |
143 | void kexgex_client(Kex *); | |
144 | void kexgex_server(Kex *); | |
b2b34e95 | 145 | #ifdef GSSAPI |
23987cb8 | 146 | void kexgss_client(Kex *); |
147 | void kexgss_server(Kex *); | |
b2b34e95 | 148 | #endif |
905081a4 | 149 | |
8afc6a66 | 150 | u_char * |
151 | kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int, | |
152 | BIGNUM *, BIGNUM *, BIGNUM *); | |
153 | u_char * | |
154 | kexgex_hash(char *, char *, char *, int, char *, int, u_char *, int, | |
155 | int, int, int, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *); | |
3c0ef626 | 156 | |
7e82606e | 157 | void |
158 | derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]); | |
159 | ||
3c0ef626 | 160 | #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) |
161 | void dump_digest(char *, u_char *, int); | |
162 | #endif | |
163 | ||
164 | #endif |