Annotation of src/usr.bin/ssh/kex.h, Revision 1.35
1.35 ! djm 1: /* $OpenBSD: kex.h,v 1.34 2004/05/21 08:43:03 markus 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:
1.5 provos 34: #define KEX_DH1 "diffie-hellman-group1-sha1"
1.35 ! djm 35: #define KEX_DH14 "diffie-hellman-group14-sha1"
1.5 provos 36: #define KEX_DHGEX "diffie-hellman-group-exchange-sha1"
1.1 markus 37:
38: enum kex_init_proposals {
39: PROPOSAL_KEX_ALGS,
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,
47: PROPOSAL_LANG_CTOS,
48: PROPOSAL_LANG_STOC,
49: PROPOSAL_MAX
50: };
51:
52: enum kex_modes {
53: MODE_IN,
54: MODE_OUT,
55: MODE_MAX
56: };
57:
1.5 provos 58: enum kex_exchange {
1.33 markus 59: KEX_DH_GRP1_SHA1,
1.35 ! djm 60: KEX_DH_GRP14_SHA1,
1.33 markus 61: KEX_DH_GEX_SHA1,
62: KEX_MAX
1.5 provos 63: };
1.13 stevesk 64:
1.19 markus 65: #define KEX_INIT_SENT 0x0001
66:
1.1 markus 67: typedef struct Kex Kex;
68: typedef struct Mac Mac;
69: typedef struct Comp Comp;
70: typedef struct Enc Enc;
1.19 markus 71: typedef struct Newkeys Newkeys;
1.1 markus 72:
73: struct Enc {
1.19 markus 74: char *name;
75: Cipher *cipher;
76: int enabled;
1.29 markus 77: u_int key_len;
78: u_int block_size;
1.10 markus 79: u_char *key;
80: u_char *iv;
1.1 markus 81: };
82: struct Mac {
1.19 markus 83: char *name;
84: int enabled;
1.31 markus 85: const EVP_MD *md;
1.19 markus 86: int mac_len;
1.10 markus 87: u_char *key;
1.19 markus 88: int key_len;
1.1 markus 89: };
90: struct Comp {
1.19 markus 91: int type;
92: int enabled;
93: char *name;
94: };
95: struct Newkeys {
96: Enc enc;
97: Mac mac;
98: Comp comp;
1.1 markus 99: };
100: struct Kex {
1.19 markus 101: u_char *session_id;
1.32 markus 102: u_int session_id_len;
1.22 markus 103: Newkeys *newkeys[MODE_MAX];
1.19 markus 104: int we_need;
105: int server;
106: char *name;
107: int hostkey_type;
108: int kex_type;
109: Buffer my;
110: Buffer peer;
1.22 markus 111: int done;
1.19 markus 112: int flags;
113: char *client_version_string;
114: char *server_version_string;
1.25 itojun 115: int (*verify_host_key)(Key *);
116: Key *(*load_host_key)(int);
1.30 provos 117: int (*host_key_index)(Key *);
1.33 markus 118: void (*kex[KEX_MAX])(Kex *);
1.1 markus 119: };
120:
1.25 itojun 121: Kex *kex_setup(char *[PROPOSAL_MAX]);
1.26 markus 122: void kex_finish(Kex *);
1.20 markus 123:
1.26 markus 124: void kex_send_kexinit(Kex *);
1.28 markus 125: void kex_input_kexinit(int, u_int32_t, void *);
1.26 markus 126: void kex_derive_keys(Kex *, u_char *, BIGNUM *);
1.18 markus 127:
1.33 markus 128: Newkeys *kex_get_newkeys(int);
1.19 markus 129:
1.33 markus 130: void kexdh_client(Kex *);
131: void kexdh_server(Kex *);
132: void kexgex_client(Kex *);
133: void kexgex_server(Kex *);
134:
135: u_char *
136: kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
137: BIGNUM *, BIGNUM *, BIGNUM *);
138: u_char *
139: kexgex_hash(char *, char *, char *, int, char *, int, u_char *, int,
140: int, int, int, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *);
1.34 markus 141:
142: void
143: derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]);
1.18 markus 144:
145: #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH)
1.25 itojun 146: void dump_digest(char *, u_char *, int);
1.18 markus 147: #endif
1.1 markus 148:
149: #endif
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