2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2009 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
112 #include <openssl/objects.h>
113 #include "ssl_locl.h"
115 /* Add the client's renegotiation binding */
116 int ssl_add_clienthello_renegotiate_ext(SSL
*s
, unsigned char *p
, int *len
,
120 if ((s
->s3
->previous_client_finished_len
+ 1) > maxlen
) {
121 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT
,
122 SSL_R_RENEGOTIATE_EXT_TOO_LONG
);
127 *p
= s
->s3
->previous_client_finished_len
;
130 memcpy(p
, s
->s3
->previous_client_finished
,
131 s
->s3
->previous_client_finished_len
);
132 #ifdef OPENSSL_RI_DEBUG
133 fprintf(stderr
, "%s RI extension sent by client\n",
134 s
->s3
->previous_client_finished_len
? "Non-empty" : "Empty");
138 *len
= s
->s3
->previous_client_finished_len
+ 1;
144 * Parse the client's renegotiation binding and abort if it's not right
146 int ssl_parse_clienthello_renegotiate_ext(SSL
*s
, unsigned char *d
, int len
,
151 /* Parse the length byte */
153 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT
,
154 SSL_R_RENEGOTIATION_ENCODING_ERR
);
155 *al
= SSL_AD_ILLEGAL_PARAMETER
;
161 /* Consistency check */
162 if ((ilen
+ 1) != len
) {
163 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT
,
164 SSL_R_RENEGOTIATION_ENCODING_ERR
);
165 *al
= SSL_AD_ILLEGAL_PARAMETER
;
169 /* Check that the extension matches */
170 if (ilen
!= s
->s3
->previous_client_finished_len
) {
171 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT
,
172 SSL_R_RENEGOTIATION_MISMATCH
);
173 *al
= SSL_AD_HANDSHAKE_FAILURE
;
177 if (memcmp(d
, s
->s3
->previous_client_finished
,
178 s
->s3
->previous_client_finished_len
)) {
179 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT
,
180 SSL_R_RENEGOTIATION_MISMATCH
);
181 *al
= SSL_AD_HANDSHAKE_FAILURE
;
184 #ifdef OPENSSL_RI_DEBUG
185 fprintf(stderr
, "%s RI extension received by server\n",
186 ilen
? "Non-empty" : "Empty");
189 s
->s3
->send_connection_binding
= 1;
194 /* Add the server's renegotiation binding */
195 int ssl_add_serverhello_renegotiate_ext(SSL
*s
, unsigned char *p
, int *len
,
199 if ((s
->s3
->previous_client_finished_len
+
200 s
->s3
->previous_server_finished_len
+ 1) > maxlen
) {
201 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT
,
202 SSL_R_RENEGOTIATE_EXT_TOO_LONG
);
207 *p
= s
->s3
->previous_client_finished_len
+
208 s
->s3
->previous_server_finished_len
;
211 memcpy(p
, s
->s3
->previous_client_finished
,
212 s
->s3
->previous_client_finished_len
);
213 p
+= s
->s3
->previous_client_finished_len
;
215 memcpy(p
, s
->s3
->previous_server_finished
,
216 s
->s3
->previous_server_finished_len
);
217 #ifdef OPENSSL_RI_DEBUG
218 fprintf(stderr
, "%s RI extension sent by server\n",
219 s
->s3
->previous_client_finished_len
? "Non-empty" : "Empty");
223 *len
= s
->s3
->previous_client_finished_len
224 + s
->s3
->previous_server_finished_len
+ 1;
230 * Parse the server's renegotiation binding and abort if it's not right
232 int ssl_parse_serverhello_renegotiate_ext(SSL
*s
, unsigned char *d
, int len
,
235 int expected_len
= s
->s3
->previous_client_finished_len
236 + s
->s3
->previous_server_finished_len
;
239 /* Check for logic errors */
240 OPENSSL_assert(!expected_len
|| s
->s3
->previous_client_finished_len
);
241 OPENSSL_assert(!expected_len
|| s
->s3
->previous_server_finished_len
);
243 /* Parse the length byte */
245 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT
,
246 SSL_R_RENEGOTIATION_ENCODING_ERR
);
247 *al
= SSL_AD_ILLEGAL_PARAMETER
;
253 /* Consistency check */
254 if (ilen
+ 1 != len
) {
255 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT
,
256 SSL_R_RENEGOTIATION_ENCODING_ERR
);
257 *al
= SSL_AD_ILLEGAL_PARAMETER
;
261 /* Check that the extension matches */
262 if (ilen
!= expected_len
) {
263 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT
,
264 SSL_R_RENEGOTIATION_MISMATCH
);
265 *al
= SSL_AD_HANDSHAKE_FAILURE
;
269 if (memcmp(d
, s
->s3
->previous_client_finished
,
270 s
->s3
->previous_client_finished_len
)) {
271 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT
,
272 SSL_R_RENEGOTIATION_MISMATCH
);
273 *al
= SSL_AD_HANDSHAKE_FAILURE
;
276 d
+= s
->s3
->previous_client_finished_len
;
278 if (memcmp(d
, s
->s3
->previous_server_finished
,
279 s
->s3
->previous_server_finished_len
)) {
280 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT
,
281 SSL_R_RENEGOTIATION_MISMATCH
);
282 *al
= SSL_AD_ILLEGAL_PARAMETER
;
285 #ifdef OPENSSL_RI_DEBUG
286 fprintf(stderr
, "%s RI extension received by client\n",
287 ilen
? "Non-empty" : "Empty");
289 s
->s3
->send_connection_binding
= 1;