Annotation of src/usr.bin/ssh/kex.h, Revision 1.42
1.42 ! djm 1: /* $OpenBSD: kex.h,v 1.41 2006/03/25 22:22:43 djm 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: #include "buffer.h"
1.18 markus 31: #include "cipher.h"
32: #include "key.h"
1.14 markus 33:
1.38 djm 34: #define KEX_DH1 "diffie-hellman-group1-sha1"
35: #define KEX_DH14 "diffie-hellman-group14-sha1"
36: #define KEX_DHGEX_SHA1 "diffie-hellman-group-exchange-sha1"
1.39 djm 37: #define KEX_DHGEX_SHA256 "diffie-hellman-group-exchange-sha256"
1.37 markus 38:
39: #define COMP_NONE 0
40: #define COMP_ZLIB 1
41: #define COMP_DELAYED 2
1.1 markus 42:
43: enum kex_init_proposals {
44: PROPOSAL_KEX_ALGS,
45: PROPOSAL_SERVER_HOST_KEY_ALGS,
46: PROPOSAL_ENC_ALGS_CTOS,
47: PROPOSAL_ENC_ALGS_STOC,
48: PROPOSAL_MAC_ALGS_CTOS,
49: PROPOSAL_MAC_ALGS_STOC,
50: PROPOSAL_COMP_ALGS_CTOS,
51: PROPOSAL_COMP_ALGS_STOC,
52: PROPOSAL_LANG_CTOS,
53: PROPOSAL_LANG_STOC,
54: PROPOSAL_MAX
55: };
56:
57: enum kex_modes {
58: MODE_IN,
59: MODE_OUT,
60: MODE_MAX
61: };
62:
1.5 provos 63: enum kex_exchange {
1.33 markus 64: KEX_DH_GRP1_SHA1,
1.35 djm 65: KEX_DH_GRP14_SHA1,
1.33 markus 66: KEX_DH_GEX_SHA1,
1.39 djm 67: KEX_DH_GEX_SHA256,
1.33 markus 68: KEX_MAX
1.5 provos 69: };
1.13 stevesk 70:
1.19 markus 71: #define KEX_INIT_SENT 0x0001
72:
1.1 markus 73: typedef struct Kex Kex;
74: typedef struct Mac Mac;
75: typedef struct Comp Comp;
76: typedef struct Enc Enc;
1.19 markus 77: typedef struct Newkeys Newkeys;
1.1 markus 78:
79: struct Enc {
1.19 markus 80: char *name;
81: Cipher *cipher;
82: int enabled;
1.29 markus 83: u_int key_len;
84: u_int block_size;
1.10 markus 85: u_char *key;
86: u_char *iv;
1.1 markus 87: };
88: struct Mac {
1.19 markus 89: char *name;
90: int enabled;
1.31 markus 91: const EVP_MD *md;
1.36 djm 92: u_int mac_len;
1.10 markus 93: u_char *key;
1.36 djm 94: u_int key_len;
1.1 markus 95: };
96: struct Comp {
1.19 markus 97: int type;
98: int enabled;
99: char *name;
100: };
101: struct Newkeys {
102: Enc enc;
103: Mac mac;
104: Comp comp;
1.1 markus 105: };
106: struct Kex {
1.19 markus 107: u_char *session_id;
1.32 markus 108: u_int session_id_len;
1.22 markus 109: Newkeys *newkeys[MODE_MAX];
1.36 djm 110: u_int we_need;
1.19 markus 111: int server;
112: char *name;
113: int hostkey_type;
114: int kex_type;
115: Buffer my;
116: Buffer peer;
1.42 ! djm 117: sig_atomic_t done;
1.19 markus 118: int flags;
1.38 djm 119: const EVP_MD *evp_md;
1.19 markus 120: char *client_version_string;
121: char *server_version_string;
1.25 itojun 122: int (*verify_host_key)(Key *);
123: Key *(*load_host_key)(int);
1.30 provos 124: int (*host_key_index)(Key *);
1.33 markus 125: void (*kex[KEX_MAX])(Kex *);
1.1 markus 126: };
127:
1.25 itojun 128: Kex *kex_setup(char *[PROPOSAL_MAX]);
1.26 markus 129: void kex_finish(Kex *);
1.20 markus 130:
1.26 markus 131: void kex_send_kexinit(Kex *);
1.28 markus 132: void kex_input_kexinit(int, u_int32_t, void *);
1.38 djm 133: void kex_derive_keys(Kex *, u_char *, u_int, BIGNUM *);
1.18 markus 134:
1.33 markus 135: Newkeys *kex_get_newkeys(int);
1.19 markus 136:
1.33 markus 137: void kexdh_client(Kex *);
138: void kexdh_server(Kex *);
139: void kexgex_client(Kex *);
140: void kexgex_server(Kex *);
141:
1.38 djm 142: void
1.33 markus 143: kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
1.38 djm 144: BIGNUM *, BIGNUM *, BIGNUM *, u_char **, u_int *);
145: void
146: kexgex_hash(const EVP_MD *, char *, char *, char *, int, char *,
1.40 deraadt 147: int, u_char *, int, int, int, int, BIGNUM *, BIGNUM *, BIGNUM *,
1.38 djm 148: BIGNUM *, BIGNUM *, u_char **, u_int *);
1.34 markus 149:
150: void
151: derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]);
1.18 markus 152:
153: #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
1.25 itojun 154: void dump_digest(char *, u_char *, int);
1.18 markus 155: #endif
1.1 markus 156:
157: #endif
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