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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* Copyright (C) 2000,2001,2002,2003 Nikos Mavroyanopoulos
* Copyright (C) 2004 Free Software Foundation
*
* This file is part of GNUTLS.
*
* The GNUTLS library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* This file contains the Anonymous Diffie Hellman key exchange part of
* the anonymous authentication. The functions here are used in the
* handshake.
*/
#include <gnutls_int.h>
#ifdef ENABLE_ANON
#include "gnutls_auth_int.h"
#include "gnutls_errors.h"
#include "gnutls_dh.h"
#include "auth_anon.h"
#include "gnutls_num.h"
#include "gnutls_mpi.h"
#include <gnutls_state.h>
#include <auth_dh_common.h>
static int gen_anon_server_kx(gnutls_session_t, opaque **);
static int proc_anon_client_kx(gnutls_session_t, opaque *, size_t);
static int proc_anon_server_kx(gnutls_session_t, opaque *, size_t);
const mod_auth_st anon_auth_struct = {
"ANON",
NULL,
NULL,
gen_anon_server_kx,
_gnutls_gen_dh_common_client_kx, /* this can be shared */
NULL,
NULL,
NULL,
NULL, /* certificate */
proc_anon_server_kx,
proc_anon_client_kx,
NULL,
NULL
};
static int gen_anon_server_kx(gnutls_session_t session, opaque ** data)
{
mpi_t g, p;
const mpi_t *mpis;
int ret;
gnutls_dh_params_t dh_params;
const gnutls_anon_server_credentials_t cred;
cred = _gnutls_get_cred(session->key, GNUTLS_CRD_ANON, NULL);
if (cred == NULL) {
gnutls_assert();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
dh_params = _gnutls_anon_get_dh_params(cred, session);
mpis = _gnutls_get_dh_params(dh_params);
if (mpis == NULL) {
gnutls_assert();
return GNUTLS_E_NO_TEMPORARY_DH_PARAMS;
}
p = mpis[0];
g = mpis[1];
if ((ret =
_gnutls_auth_info_set(session, GNUTLS_CRD_ANON,
sizeof(anon_server_auth_info_st), 1)) < 0) {
gnutls_assert();
return ret;
}
_gnutls_dh_set_group(session, g, p);
ret = _gnutls_dh_common_print_server_kx(session, g, p, data);
if (ret < 0) {
gnutls_assert();
}
return ret;
}
static int proc_anon_client_kx(gnutls_session_t session, opaque * data,
size_t _data_size)
{
const gnutls_anon_server_credentials_t cred;
int bits;
int ret;
mpi_t p, g;
gnutls_dh_params_t dh_params;
const mpi_t *mpis;
bits = _gnutls_dh_get_allowed_prime_bits(session);
cred = _gnutls_get_cred(session->key, GNUTLS_CRD_ANON, NULL);
if (cred == NULL) {
gnutls_assert();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
dh_params = _gnutls_anon_get_dh_params(cred, session);
mpis = _gnutls_get_dh_params(dh_params);
if (mpis == NULL) {
gnutls_assert();
return GNUTLS_E_NO_TEMPORARY_DH_PARAMS;
}
p = mpis[0];
g = mpis[1];
ret =
_gnutls_proc_dh_common_client_kx(session, data, _data_size, g, p);
return ret;
}
int proc_anon_server_kx(gnutls_session_t session, opaque * data,
size_t _data_size)
{
int ret;
/* set auth_info */
if ((ret =
_gnutls_auth_info_set(session, GNUTLS_CRD_ANON,
sizeof(anon_client_auth_info_st), 1)) < 0) {
gnutls_assert();
return ret;
}
ret = _gnutls_proc_dh_common_server_kx(session, data, _data_size);
if (ret < 0) {
gnutls_assert();
return ret;
}
return 0;
}
#endif /* ENABLE_ANON */
|
