1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/* $OpenBSD: kex.h,v 1.14 2001/02/11 12:59:24 markus Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef KEX_H
#define KEX_H
#include <openssl/evp.h>
#include "buffer.h"
#define KEX_DH1 "diffie-hellman-group1-sha1"
#define KEX_DHGEX "diffie-hellman-group-exchange-sha1"
enum kex_init_proposals {
PROPOSAL_KEX_ALGS,
PROPOSAL_SERVER_HOST_KEY_ALGS,
PROPOSAL_ENC_ALGS_CTOS,
PROPOSAL_ENC_ALGS_STOC,
PROPOSAL_MAC_ALGS_CTOS,
PROPOSAL_MAC_ALGS_STOC,
PROPOSAL_COMP_ALGS_CTOS,
PROPOSAL_COMP_ALGS_STOC,
PROPOSAL_LANG_CTOS,
PROPOSAL_LANG_STOC,
PROPOSAL_MAX
};
enum kex_modes {
MODE_IN,
MODE_OUT,
MODE_MAX
};
enum kex_exchange {
DH_GRP1_SHA1,
DH_GEX_SHA1
};
typedef struct Kex Kex;
typedef struct Mac Mac;
typedef struct Comp Comp;
typedef struct Enc Enc;
struct Enc {
char *name;
Cipher *cipher;
int enabled;
u_char *key;
u_char *iv;
};
struct Mac {
char *name;
int enabled;
EVP_MD *md;
int mac_len;
u_char *key;
int key_len;
};
struct Comp {
int type;
int enabled;
char *name;
};
struct Kex {
Enc enc [MODE_MAX];
Mac mac [MODE_MAX];
Comp comp[MODE_MAX];
int we_need;
int server;
char *name;
int hostkey_type;
int kex_type;
};
Buffer *kex_init(char *myproposal[PROPOSAL_MAX]);
void
kex_exchange_kexinit(
Buffer *my_kexinit, Buffer *peer_kexint,
char *peer_proposal[PROPOSAL_MAX]);
Kex *
kex_choose_conf(char *cprop[PROPOSAL_MAX],
char *sprop[PROPOSAL_MAX], int server);
int kex_derive_keys(Kex *k, u_char *hash, BIGNUM *shared_secret);
void packet_set_kex(Kex *k);
int dh_pub_is_valid(DH *dh, BIGNUM *dh_pub);
DH *dh_new_group_asc(const char *, const char *);
DH *dh_new_group(BIGNUM *, BIGNUM *);
void dh_gen_key(DH *);
DH *dh_new_group1(void);
u_char *
kex_hash(
char *client_version_string,
char *server_version_string,
char *ckexinit, int ckexinitlen,
char *skexinit, int skexinitlen,
char *serverhostkeyblob, int sbloblen,
BIGNUM *client_dh_pub,
BIGNUM *server_dh_pub,
BIGNUM *shared_secret);
u_char *
kex_hash_gex(
char *client_version_string,
char *server_version_string,
char *ckexinit, int ckexinitlen,
char *skexinit, int skexinitlen,
char *serverhostkeyblob, int sbloblen,
int minbits, BIGNUM *prime, BIGNUM *gen,
BIGNUM *client_dh_pub,
BIGNUM *server_dh_pub,
BIGNUM *shared_secret);
#endif
|
