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);
131 #ifdef OPENSSL_RI_DEBUG
132 fprintf(stderr, "%s RI extension sent by client\n",
133 s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
137 *len = s->s3->previous_client_finished_len + 1;
143 * Parse the client's renegotiation binding and abort if it's not right
145 int ssl_parse_clienthello_renegotiate_ext(SSL *s, PACKET *pkt, int *al)
148 const unsigned char *d;
150 /* Parse the length byte */
151 if (!PACKET_get_1(pkt, &ilen)
152 || !PACKET_get_bytes(pkt, &d, ilen)) {
153 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
154 SSL_R_RENEGOTIATION_ENCODING_ERR);
155 *al = SSL_AD_ILLEGAL_PARAMETER;
159 /* Check that the extension matches */
160 if (ilen != s->s3->previous_client_finished_len) {
161 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
162 SSL_R_RENEGOTIATION_MISMATCH);
163 *al = SSL_AD_HANDSHAKE_FAILURE;
167 if (memcmp(d, s->s3->previous_client_finished,
168 s->s3->previous_client_finished_len)) {
169 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
170 SSL_R_RENEGOTIATION_MISMATCH);
171 *al = SSL_AD_HANDSHAKE_FAILURE;
174 #ifdef OPENSSL_RI_DEBUG
175 fprintf(stderr, "%s RI extension received by server\n",
176 ilen ? "Non-empty" : "Empty");
179 s->s3->send_connection_binding = 1;
184 /* Add the server's renegotiation binding */
185 int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
189 if ((s->s3->previous_client_finished_len +
190 s->s3->previous_server_finished_len + 1) > maxlen) {
191 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT,
192 SSL_R_RENEGOTIATE_EXT_TOO_LONG);
197 *p = s->s3->previous_client_finished_len +
198 s->s3->previous_server_finished_len;
201 memcpy(p, s->s3->previous_client_finished,
202 s->s3->previous_client_finished_len);
203 p += s->s3->previous_client_finished_len;
205 memcpy(p, s->s3->previous_server_finished,
206 s->s3->previous_server_finished_len);
207 #ifdef OPENSSL_RI_DEBUG
208 fprintf(stderr, "%s RI extension sent by server\n",
209 s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
213 *len = s->s3->previous_client_finished_len
214 + s->s3->previous_server_finished_len + 1;
220 * Parse the server's renegotiation binding and abort if it's not right
222 int ssl_parse_serverhello_renegotiate_ext(SSL *s, PACKET *pkt, int *al)
224 unsigned int expected_len = s->s3->previous_client_finished_len
225 + s->s3->previous_server_finished_len;
227 const unsigned char *data;
229 /* Check for logic errors */
230 OPENSSL_assert(!expected_len || s->s3->previous_client_finished_len);
231 OPENSSL_assert(!expected_len || s->s3->previous_server_finished_len);
233 /* Parse the length byte */
234 if (!PACKET_get_1(pkt, &ilen)) {
235 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
236 SSL_R_RENEGOTIATION_ENCODING_ERR);
237 *al = SSL_AD_ILLEGAL_PARAMETER;
241 /* Consistency check */
242 if (PACKET_remaining(pkt) != ilen) {
243 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
244 SSL_R_RENEGOTIATION_ENCODING_ERR);
245 *al = SSL_AD_ILLEGAL_PARAMETER;
249 /* Check that the extension matches */
250 if (ilen != expected_len) {
251 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
252 SSL_R_RENEGOTIATION_MISMATCH);
253 *al = SSL_AD_HANDSHAKE_FAILURE;
257 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
258 || memcmp(data, s->s3->previous_client_finished,
259 s->s3->previous_client_finished_len) != 0) {
260 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
261 SSL_R_RENEGOTIATION_MISMATCH);
262 *al = SSL_AD_HANDSHAKE_FAILURE;
266 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
267 || memcmp(data, s->s3->previous_server_finished,
268 s->s3->previous_server_finished_len) != 0) {
269 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
270 SSL_R_RENEGOTIATION_MISMATCH);
271 *al = SSL_AD_ILLEGAL_PARAMETER;
274 #ifdef OPENSSL_RI_DEBUG
275 fprintf(stderr, "%s RI extension received by client\n",
276 ilen ? "Non-empty" : "Empty");
278 s->s3->send_connection_binding = 1;