1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
57 /* ====================================================================
58 * Copyright (c) 1998-2009 The OpenSSL Project. All rights reserved.
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
64 * 1. Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in
69 * the documentation and/or other materials provided with the
72 * 3. All advertising materials mentioning features or use of this
73 * software must display the following acknowledgment:
74 * "This product includes software developed by the OpenSSL Project
75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78 * endorse or promote products derived from this software without
79 * prior written permission. For written permission, please contact
80 * openssl-core@openssl.org.
82 * 5. Products derived from this software may not be called "OpenSSL"
83 * nor may "OpenSSL" appear in their names without prior written
84 * permission of the OpenSSL Project.
86 * 6. Redistributions of any form whatsoever must retain the following
88 * "This product includes software developed by the OpenSSL Project
89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102 * OF THE POSSIBILITY OF SUCH DAMAGE.
103 * ====================================================================
105 * This product includes cryptographic software written by Eric Young
106 * (eay@cryptsoft.com). This product includes software written by Tim
107 * Hudson (tjh@cryptsoft.com).
111 #include <openssl/objects.h>
112 #include "ssl_locl.h"
114 /* Add the client's renegotiation binding */
115 int ssl_add_clienthello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
119 if ((s->s3->previous_client_finished_len + 1) > maxlen) {
120 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT,
121 SSL_R_RENEGOTIATE_EXT_TOO_LONG);
126 *p = s->s3->previous_client_finished_len;
129 memcpy(p, s->s3->previous_client_finished,
130 s->s3->previous_client_finished_len);
133 *len = s->s3->previous_client_finished_len + 1;
139 * Parse the client's renegotiation binding and abort if it's not right
141 int ssl_parse_clienthello_renegotiate_ext(SSL *s, PACKET *pkt, int *al)
144 const unsigned char *d;
146 /* Parse the length byte */
147 if (!PACKET_get_1(pkt, &ilen)
148 || !PACKET_get_bytes(pkt, &d, ilen)) {
149 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
150 SSL_R_RENEGOTIATION_ENCODING_ERR);
151 *al = SSL_AD_ILLEGAL_PARAMETER;
155 /* Check that the extension matches */
156 if (ilen != s->s3->previous_client_finished_len) {
157 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
158 SSL_R_RENEGOTIATION_MISMATCH);
159 *al = SSL_AD_HANDSHAKE_FAILURE;
163 if (memcmp(d, s->s3->previous_client_finished,
164 s->s3->previous_client_finished_len)) {
165 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
166 SSL_R_RENEGOTIATION_MISMATCH);
167 *al = SSL_AD_HANDSHAKE_FAILURE;
171 s->s3->send_connection_binding = 1;
176 /* Add the server's renegotiation binding */
177 int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
181 if ((s->s3->previous_client_finished_len +
182 s->s3->previous_server_finished_len + 1) > maxlen) {
183 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT,
184 SSL_R_RENEGOTIATE_EXT_TOO_LONG);
189 *p = s->s3->previous_client_finished_len +
190 s->s3->previous_server_finished_len;
193 memcpy(p, s->s3->previous_client_finished,
194 s->s3->previous_client_finished_len);
195 p += s->s3->previous_client_finished_len;
197 memcpy(p, s->s3->previous_server_finished,
198 s->s3->previous_server_finished_len);
201 *len = s->s3->previous_client_finished_len
202 + s->s3->previous_server_finished_len + 1;
208 * Parse the server's renegotiation binding and abort if it's not right
210 int ssl_parse_serverhello_renegotiate_ext(SSL *s, PACKET *pkt, int *al)
212 unsigned int expected_len = s->s3->previous_client_finished_len
213 + s->s3->previous_server_finished_len;
215 const unsigned char *data;
217 /* Check for logic errors */
218 OPENSSL_assert(!expected_len || s->s3->previous_client_finished_len);
219 OPENSSL_assert(!expected_len || s->s3->previous_server_finished_len);
221 /* Parse the length byte */
222 if (!PACKET_get_1(pkt, &ilen)) {
223 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
224 SSL_R_RENEGOTIATION_ENCODING_ERR);
225 *al = SSL_AD_ILLEGAL_PARAMETER;
229 /* Consistency check */
230 if (PACKET_remaining(pkt) != ilen) {
231 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
232 SSL_R_RENEGOTIATION_ENCODING_ERR);
233 *al = SSL_AD_ILLEGAL_PARAMETER;
237 /* Check that the extension matches */
238 if (ilen != expected_len) {
239 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
240 SSL_R_RENEGOTIATION_MISMATCH);
241 *al = SSL_AD_HANDSHAKE_FAILURE;
245 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
246 || memcmp(data, s->s3->previous_client_finished,
247 s->s3->previous_client_finished_len) != 0) {
248 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
249 SSL_R_RENEGOTIATION_MISMATCH);
250 *al = SSL_AD_HANDSHAKE_FAILURE;
254 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
255 || memcmp(data, s->s3->previous_server_finished,
256 s->s3->previous_server_finished_len) != 0) {
257 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
258 SSL_R_RENEGOTIATION_MISMATCH);
259 *al = SSL_AD_ILLEGAL_PARAMETER;
262 s->s3->send_connection_binding = 1;