450 lines
14 KiB
C
450 lines
14 KiB
C
/* ssl/t1_lib.c */
|
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
|
* All rights reserved.
|
|
*
|
|
* This package is an SSL implementation written
|
|
* by Eric Young (eay@cryptsoft.com).
|
|
* The implementation was written so as to conform with Netscapes SSL.
|
|
*
|
|
* This library is free for commercial and non-commercial use as long as
|
|
* the following conditions are aheared to. The following conditions
|
|
* apply to all code found in this distribution, be it the RC4, RSA,
|
|
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
|
|
* included with this distribution is covered by the same copyright terms
|
|
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
|
|
*
|
|
* Copyright remains Eric Young's, and as such any Copyright notices in
|
|
* the code are not to be removed.
|
|
* If this package is used in a product, Eric Young should be given attribution
|
|
* as the author of the parts of the library used.
|
|
* This can be in the form of a textual message at program startup or
|
|
* in documentation (online or textual) provided with the package.
|
|
*
|
|
* 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 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* "This product includes cryptographic software written by
|
|
* Eric Young (eay@cryptsoft.com)"
|
|
* The word 'cryptographic' can be left out if the rouines from the library
|
|
* being used are not cryptographic related :-).
|
|
* 4. If you include any Windows specific code (or a derivative thereof) from
|
|
* the apps directory (application code) you must include an acknowledgement:
|
|
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 OR CONTRIBUTORS 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.
|
|
*
|
|
* The licence and distribution terms for any publically available version or
|
|
* derivative of this code cannot be changed. i.e. this code cannot simply be
|
|
* copied and put under another distribution licence
|
|
* [including the GNU Public Licence.]
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 1998-2006 The OpenSSL Project. 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.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this
|
|
* software must display the following acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
|
|
*
|
|
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
|
* endorse or promote products derived from this software without
|
|
* prior written permission. For written permission, please contact
|
|
* openssl-core@openssl.org.
|
|
*
|
|
* 5. Products derived from this software may not be called "OpenSSL"
|
|
* nor may "OpenSSL" appear in their names without prior written
|
|
* permission of the OpenSSL Project.
|
|
*
|
|
* 6. Redistributions of any form whatsoever must retain the following
|
|
* acknowledgment:
|
|
* "This product includes software developed by the OpenSSL Project
|
|
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
|
* EXPRESSED 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 OpenSSL PROJECT OR
|
|
* ITS CONTRIBUTORS 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.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
/*
|
|
* 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_locl.h"
|
|
|
|
#ifndef OPENSSL_NO_SRTP
|
|
|
|
# include "srtp.h"
|
|
|
|
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,
|
|
},
|
|
# if 0
|
|
{
|
|
"SRTP_NULL_SHA1_80",
|
|
SRTP_NULL_SHA1_80,
|
|
},
|
|
{
|
|
"SRTP_NULL_SHA1_32",
|
|
SRTP_NULL_SHA1_32,
|
|
},
|
|
# endif
|
|
{0}
|
|
};
|
|
|
|
static int find_profile_by_name(char *profile_name,
|
|
SRTP_PROTECTION_PROFILE **pptr, unsigned len)
|
|
{
|
|
SRTP_PROTECTION_PROFILE *p;
|
|
|
|
p = srtp_known_profiles;
|
|
while (p->name) {
|
|
if ((len == strlen(p->name)) && !strncmp(p->name, profile_name, len)) {
|
|
*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())) {
|
|
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 ? col - ptr : (int)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);
|
|
sk_SRTP_PROTECTION_PROFILE_free(profiles);
|
|
return 1;
|
|
}
|
|
|
|
sk_SRTP_PROTECTION_PROFILE_push(profiles, p);
|
|
} else {
|
|
SSLerr(SSL_F_SSL_CTX_MAKE_PROFILES,
|
|
SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE);
|
|
sk_SRTP_PROTECTION_PROFILE_free(profiles);
|
|
return 1;
|
|
}
|
|
|
|
if (col)
|
|
ptr = col + 1;
|
|
} while (col);
|
|
|
|
*out = profiles;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Note: this function returns 0 length if there are no profiles specified
|
|
*/
|
|
int ssl_add_clienthello_use_srtp_ext(SSL *s, unsigned char *p, int *len,
|
|
int maxlen)
|
|
{
|
|
int ct = 0;
|
|
int i;
|
|
STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = 0;
|
|
SRTP_PROTECTION_PROFILE *prof;
|
|
|
|
clnt = SSL_get_srtp_profiles(s);
|
|
ct = sk_SRTP_PROTECTION_PROFILE_num(clnt); /* -1 if clnt == 0 */
|
|
|
|
if (p) {
|
|
if (ct == 0) {
|
|
SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT,
|
|
SSL_R_EMPTY_SRTP_PROTECTION_PROFILE_LIST);
|
|
return 1;
|
|
}
|
|
|
|
if ((2 + ct * 2 + 1) > maxlen) {
|
|
SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT,
|
|
SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG);
|
|
return 1;
|
|
}
|
|
|
|
/* Add the length */
|
|
s2n(ct * 2, p);
|
|
for (i = 0; i < ct; i++) {
|
|
prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
|
|
s2n(prof->id, p);
|
|
}
|
|
|
|
/* Add an empty use_mki value */
|
|
*p++ = 0;
|
|
}
|
|
|
|
*len = 2 + ct * 2 + 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ssl_parse_clienthello_use_srtp_ext(SSL *s, unsigned char *d, int len,
|
|
int *al)
|
|
{
|
|
SRTP_PROTECTION_PROFILE *sprof;
|
|
STACK_OF(SRTP_PROTECTION_PROFILE) *srvr;
|
|
int ct;
|
|
int mki_len;
|
|
int i, srtp_pref;
|
|
unsigned int id;
|
|
|
|
/* Length value + the MKI length */
|
|
if (len < 3) {
|
|
SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
|
|
SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
|
|
*al = SSL_AD_DECODE_ERROR;
|
|
return 1;
|
|
}
|
|
|
|
/* Pull off the length of the cipher suite list */
|
|
n2s(d, ct);
|
|
len -= 2;
|
|
|
|
/* Check that it is even */
|
|
if (ct % 2) {
|
|
SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
|
|
SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
|
|
*al = SSL_AD_DECODE_ERROR;
|
|
return 1;
|
|
}
|
|
|
|
/* Check that lengths are consistent */
|
|
if (len < (ct + 1)) {
|
|
SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
|
|
SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
|
|
*al = SSL_AD_DECODE_ERROR;
|
|
return 1;
|
|
}
|
|
|
|
srvr = SSL_get_srtp_profiles(s);
|
|
s->srtp_profile = NULL;
|
|
/* Search all profiles for a match initially */
|
|
srtp_pref = sk_SRTP_PROTECTION_PROFILE_num(srvr);
|
|
|
|
while (ct) {
|
|
n2s(d, id);
|
|
ct -= 2;
|
|
len -= 2;
|
|
|
|
/*
|
|
* Only look for match in profiles of higher preference than
|
|
* current match.
|
|
* If no profiles have been have been configured then this
|
|
* does nothing.
|
|
*/
|
|
for (i = 0; i < srtp_pref; i++) {
|
|
sprof = sk_SRTP_PROTECTION_PROFILE_value(srvr, i);
|
|
if (sprof->id == id) {
|
|
s->srtp_profile = sprof;
|
|
srtp_pref = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now extract the MKI value as a sanity check, but discard it for now
|
|
*/
|
|
mki_len = *d;
|
|
d++;
|
|
len--;
|
|
|
|
if (mki_len != len) {
|
|
SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT,
|
|
SSL_R_BAD_SRTP_MKI_VALUE);
|
|
*al = SSL_AD_DECODE_ERROR;
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ssl_add_serverhello_use_srtp_ext(SSL *s, unsigned char *p, int *len,
|
|
int maxlen)
|
|
{
|
|
if (p) {
|
|
if (maxlen < 5) {
|
|
SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT,
|
|
SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG);
|
|
return 1;
|
|
}
|
|
|
|
if (s->srtp_profile == 0) {
|
|
SSLerr(SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT,
|
|
SSL_R_USE_SRTP_NOT_NEGOTIATED);
|
|
return 1;
|
|
}
|
|
s2n(2, p);
|
|
s2n(s->srtp_profile->id, p);
|
|
*p++ = 0;
|
|
}
|
|
*len = 5;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ssl_parse_serverhello_use_srtp_ext(SSL *s, unsigned char *d, int len,
|
|
int *al)
|
|
{
|
|
unsigned id;
|
|
int i;
|
|
int ct;
|
|
|
|
STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
|
|
SRTP_PROTECTION_PROFILE *prof;
|
|
|
|
if (len != 5) {
|
|
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
|
|
SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
|
|
*al = SSL_AD_DECODE_ERROR;
|
|
return 1;
|
|
}
|
|
|
|
n2s(d, ct);
|
|
if (ct != 2) {
|
|
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
|
|
SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
|
|
*al = SSL_AD_DECODE_ERROR;
|
|
return 1;
|
|
}
|
|
|
|
n2s(d, id);
|
|
if (*d) { /* Must be no MKI, since we never offer one */
|
|
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
|
|
SSL_R_BAD_SRTP_MKI_VALUE);
|
|
*al = SSL_AD_ILLEGAL_PARAMETER;
|
|
return 1;
|
|
}
|
|
|
|
clnt = SSL_get_srtp_profiles(s);
|
|
|
|
/* Throw an error if the server gave us an unsolicited extension */
|
|
if (clnt == NULL) {
|
|
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
|
|
SSL_R_NO_SRTP_PROFILES);
|
|
*al = SSL_AD_DECODE_ERROR;
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Check to see if the server gave us something we support (and
|
|
* presumably offered)
|
|
*/
|
|
for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) {
|
|
prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
|
|
|
|
if (prof->id == id) {
|
|
s->srtp_profile = prof;
|
|
*al = 0;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT,
|
|
SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
|
|
*al = SSL_AD_DECODE_ERROR;
|
|
return 1;
|
|
}
|
|
|
|
#endif
|