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
|
/*
* Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* DTLS code by Eric Rescorla <ekr@rtfm.com>
*
* Copyright (C) 2006, Network Resonance, Inc. Copyright (C) 2011, RTFM, Inc.
*/
#include <stdio.h>
#include <openssl/objects.h>
#include "ssl_local.h"
#ifndef OPENSSL_NO_SRTP
static SRTP_PROTECTION_PROFILE srtp_known_profiles[] = {
{
"SRTP_AES128_CM_SHA1_80",
SRTP_AES128_CM_SHA1_80,
},
{
"SRTP_AES128_CM_SHA1_32",
SRTP_AES128_CM_SHA1_32,
},
{
"SRTP_AEAD_AES_128_GCM",
SRTP_AEAD_AES_128_GCM,
},
{
"SRTP_AEAD_AES_256_GCM",
SRTP_AEAD_AES_256_GCM,
},
{0}
};
static int find_profile_by_name(char *profile_name,
SRTP_PROTECTION_PROFILE **pptr, size_t len)
{
SRTP_PROTECTION_PROFILE *p;
p = srtp_known_profiles;
while (p->name) {
if ((len == strlen(p->name))
&& strncmp(p->name, profile_name, len) == 0) {
*pptr = p;
return 0;
}
p++;
}
return 1;
}
static int ssl_ctx_make_profiles(const char *profiles_string,
STACK_OF(SRTP_PROTECTION_PROFILE) **out)
{
STACK_OF(SRTP_PROTECTION_PROFILE) *profiles;
char *col;
char *ptr = (char *)profiles_string;
SRTP_PROTECTION_PROFILE *p;
if ((profiles = sk_SRTP_PROTECTION_PROFILE_new_null()) == NULL) {
SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
return 1;
}
do {
col = strchr(ptr, ':');
if (!find_profile_by_name(ptr, &p, col ? (size_t)(col - ptr)
: strlen(ptr))) {
if (sk_SRTP_PROTECTION_PROFILE_find(profiles, p) >= 0) {
SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
goto err;
}
if (!sk_SRTP_PROTECTION_PROFILE_push(profiles, p)) {
SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES);
goto err;
}
} else {
SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE);
goto err;
}
if (col)
ptr = col + 1;
} while (col);
sk_SRTP_PROTECTION_PROFILE_free(*out);
*out = profiles;
return 0;
err:
sk_SRTP_PROTECTION_PROFILE_free(profiles);
return 1;
}
int SSL_CTX_set_tlsext_use_srtp(SSL_CTX *ctx, const char *profiles)
{
return ssl_ctx_make_profiles(profiles, &ctx->srtp_profiles);
}
int SSL_set_tlsext_use_srtp(SSL *s, const char *profiles)
{
return ssl_ctx_make_profiles(profiles, &s->srtp_profiles);
}
STACK_OF(SRTP_PROTECTION_PROFILE) *SSL_get_srtp_profiles(SSL *s)
{
if (s != NULL) {
if (s->srtp_profiles != NULL) {
return s->srtp_profiles;
} else if ((s->ctx != NULL) && (s->ctx->srtp_profiles != NULL)) {
return s->ctx->srtp_profiles;
}
}
return NULL;
}
SRTP_PROTECTION_PROFILE *SSL_get_selected_srtp_profile(SSL *s)
{
return s->srtp_profile;
}
#endif
|
