Annotation of src/usr.bin/ssh/kex.h, Revision 1.44
1.44 ! deraadt 1: /* $OpenBSD: kex.h,v 1.43 2006/07/23 01:11:05 stevesk Exp $ */
1.12 niklas 2:
1.1 markus 3: /*
1.24 markus 4: * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
1.1 markus 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:
1.14 markus 29: #include <openssl/evp.h>
30:
1.38 djm 31: #define KEX_DH1 "diffie-hellman-group1-sha1"
32: #define KEX_DH14 "diffie-hellman-group14-sha1"
33: #define KEX_DHGEX_SHA1 "diffie-hellman-group-exchange-sha1"
1.39 djm 34: #define KEX_DHGEX_SHA256 "diffie-hellman-group-exchange-sha256"
1.37 markus 35:
36: #define COMP_NONE 0
37: #define COMP_ZLIB 1
38: #define COMP_DELAYED 2
1.1 markus 39:
40: enum kex_init_proposals {
41: PROPOSAL_KEX_ALGS,
42: PROPOSAL_SERVER_HOST_KEY_ALGS,
43: PROPOSAL_ENC_ALGS_CTOS,
44: PROPOSAL_ENC_ALGS_STOC,
45: PROPOSAL_MAC_ALGS_CTOS,
46: PROPOSAL_MAC_ALGS_STOC,
47: PROPOSAL_COMP_ALGS_CTOS,
48: PROPOSAL_COMP_ALGS_STOC,
49: PROPOSAL_LANG_CTOS,
50: PROPOSAL_LANG_STOC,
51: PROPOSAL_MAX
52: };
53:
54: enum kex_modes {
55: MODE_IN,
56: MODE_OUT,
57: MODE_MAX
58: };
59:
1.5 provos 60: enum kex_exchange {
1.33 markus 61: KEX_DH_GRP1_SHA1,
1.35 djm 62: KEX_DH_GRP14_SHA1,
1.33 markus 63: KEX_DH_GEX_SHA1,
1.39 djm 64: KEX_DH_GEX_SHA256,
1.33 markus 65: KEX_MAX
1.5 provos 66: };
1.13 stevesk 67:
1.19 markus 68: #define KEX_INIT_SENT 0x0001
69:
1.1 markus 70: typedef struct Kex Kex;
71: typedef struct Mac Mac;
72: typedef struct Comp Comp;
73: typedef struct Enc Enc;
1.19 markus 74: typedef struct Newkeys Newkeys;
1.1 markus 75:
76: struct Enc {
1.19 markus 77: char *name;
78: Cipher *cipher;
79: int enabled;
1.29 markus 80: u_int key_len;
81: u_int block_size;
1.10 markus 82: u_char *key;
83: u_char *iv;
1.1 markus 84: };
85: struct Mac {
1.19 markus 86: char *name;
87: int enabled;
1.31 markus 88: const EVP_MD *md;
1.36 djm 89: u_int mac_len;
1.10 markus 90: u_char *key;
1.36 djm 91: u_int key_len;
1.1 markus 92: };
93: struct Comp {
1.19 markus 94: int type;
95: int enabled;
96: char *name;
97: };
98: struct Newkeys {
99: Enc enc;
100: Mac mac;
101: Comp comp;
1.1 markus 102: };
103: struct Kex {
1.19 markus 104: u_char *session_id;
1.32 markus 105: u_int session_id_len;
1.22 markus 106: Newkeys *newkeys[MODE_MAX];
1.36 djm 107: u_int we_need;
1.19 markus 108: int server;
109: char *name;
110: int hostkey_type;
111: int kex_type;
112: Buffer my;
113: Buffer peer;
1.42 djm 114: sig_atomic_t done;
1.19 markus 115: int flags;
1.38 djm 116: const EVP_MD *evp_md;
1.19 markus 117: char *client_version_string;
118: char *server_version_string;
1.25 itojun 119: int (*verify_host_key)(Key *);
120: Key *(*load_host_key)(int);
1.30 provos 121: int (*host_key_index)(Key *);
1.33 markus 122: void (*kex[KEX_MAX])(Kex *);
1.1 markus 123: };
124:
1.25 itojun 125: Kex *kex_setup(char *[PROPOSAL_MAX]);
1.26 markus 126: void kex_finish(Kex *);
1.20 markus 127:
1.26 markus 128: void kex_send_kexinit(Kex *);
1.28 markus 129: void kex_input_kexinit(int, u_int32_t, void *);
1.38 djm 130: void kex_derive_keys(Kex *, u_char *, u_int, BIGNUM *);
1.18 markus 131:
1.33 markus 132: Newkeys *kex_get_newkeys(int);
1.19 markus 133:
1.33 markus 134: void kexdh_client(Kex *);
135: void kexdh_server(Kex *);
136: void kexgex_client(Kex *);
137: void kexgex_server(Kex *);
138:
1.38 djm 139: void
1.33 markus 140: kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
1.38 djm 141: BIGNUM *, BIGNUM *, BIGNUM *, u_char **, u_int *);
142: void
143: kexgex_hash(const EVP_MD *, char *, char *, char *, int, char *,
1.40 deraadt 144: int, u_char *, int, int, int, int, BIGNUM *, BIGNUM *, BIGNUM *,
1.38 djm 145: BIGNUM *, BIGNUM *, u_char **, u_int *);
1.34 markus 146:
147: void
148: derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]);
1.18 markus 149:
150: #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
1.25 itojun 151: void dump_digest(char *, u_char *, int);
1.18 markus 152: #endif
1.1 markus 153:
154: #endif