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). */
112 #include <openssl/bytestring.h>
113 #include <openssl/obj.h>
114 #include <openssl/err.h>
116 #include "ssl_locl.h"
118 /* Add the client's renegotiation binding */
119 int ssl_add_clienthello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
124 if((s->s3->previous_client_finished_len+1) > maxlen)
126 OPENSSL_PUT_ERROR(SSL, ssl_add_clienthello_renegotiate_ext, SSL_R_RENEGOTIATE_EXT_TOO_LONG);
131 *p = s->s3->previous_client_finished_len;
134 memcpy(p, s->s3->previous_client_finished,
135 s->s3->previous_client_finished_len);
136 #ifdef OPENSSL_RI_DEBUG
137 fprintf(stderr, "%s RI extension sent by client\n",
138 s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
142 *len=s->s3->previous_client_finished_len + 1;
148 /* Parse the client's renegotiation binding and abort if it's not
150 int ssl_parse_clienthello_renegotiate_ext(SSL *s, CBS *cbs, int *out_alert)
152 CBS renegotiated_connection;
154 if (!CBS_get_u8_length_prefixed(cbs, &renegotiated_connection) ||
157 OPENSSL_PUT_ERROR(SSL, ssl_parse_clienthello_renegotiate_ext, SSL_R_RENEGOTIATION_ENCODING_ERR);
158 *out_alert = SSL_AD_DECODE_ERROR;
162 /* Check that the extension matches */
163 if (!CBS_mem_equal(&renegotiated_connection,
164 s->s3->previous_client_finished,
165 s->s3->previous_client_finished_len))
167 OPENSSL_PUT_ERROR(SSL, ssl_parse_clienthello_renegotiate_ext, SSL_R_RENEGOTIATION_MISMATCH);
168 *out_alert = SSL_AD_HANDSHAKE_FAILURE;
172 s->s3->send_connection_binding = 1;
177 /* Add the server's renegotiation binding */
178 int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
183 if((s->s3->previous_client_finished_len +
184 s->s3->previous_server_finished_len + 1) > maxlen)
186 OPENSSL_PUT_ERROR(SSL, ssl_add_serverhello_renegotiate_ext, SSL_R_RENEGOTIATE_EXT_TOO_LONG);
191 *p = s->s3->previous_client_finished_len + s->s3->previous_server_finished_len;
194 memcpy(p, s->s3->previous_client_finished,
195 s->s3->previous_client_finished_len);
196 p += s->s3->previous_client_finished_len;
198 memcpy(p, s->s3->previous_server_finished,
199 s->s3->previous_server_finished_len);
200 #ifdef OPENSSL_RI_DEBUG
201 fprintf(stderr, "%s RI extension sent by server\n",
202 s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
206 *len=s->s3->previous_client_finished_len
207 + s->s3->previous_server_finished_len + 1;
212 /* Parse the server's renegotiation binding and abort if it's not
214 int ssl_parse_serverhello_renegotiate_ext(SSL *s, CBS *cbs, int *out_alert)
216 int expected_len=s->s3->previous_client_finished_len
217 + s->s3->previous_server_finished_len;
218 CBS renegotiated_connection;
221 /* Check for logic errors */
222 assert(!expected_len || s->s3->previous_client_finished_len);
223 assert(!expected_len || s->s3->previous_server_finished_len);
225 /* Parse out the extension contents. */
226 if (!CBS_get_u8_length_prefixed(cbs, &renegotiated_connection) ||
229 OPENSSL_PUT_ERROR(SSL, ssl_parse_serverhello_renegotiate_ext, SSL_R_RENEGOTIATION_ENCODING_ERR);
230 *out_alert = SSL_AD_ILLEGAL_PARAMETER;
234 /* Check that the extension matches. */
235 if(CBS_len(&renegotiated_connection) != expected_len)
237 OPENSSL_PUT_ERROR(SSL, ssl_parse_serverhello_renegotiate_ext, SSL_R_RENEGOTIATION_MISMATCH);
238 *out_alert = SSL_AD_HANDSHAKE_FAILURE;
242 d = CBS_data(&renegotiated_connection);
243 if(memcmp(d, s->s3->previous_client_finished,
244 s->s3->previous_client_finished_len))
246 OPENSSL_PUT_ERROR(SSL, ssl_parse_serverhello_renegotiate_ext, SSL_R_RENEGOTIATION_MISMATCH);
247 *out_alert = SSL_AD_HANDSHAKE_FAILURE;
250 d += s->s3->previous_client_finished_len;
252 if(memcmp(d, s->s3->previous_server_finished,
253 s->s3->previous_server_finished_len))
255 OPENSSL_PUT_ERROR(SSL, ssl_parse_serverhello_renegotiate_ext, SSL_R_RENEGOTIATION_MISMATCH);
256 *out_alert = SSL_AD_ILLEGAL_PARAMETER;
259 s->s3->send_connection_binding = 1;