1 /* ssl/t1_reneg.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2009 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
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
71 * distribution.
72 *
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/)"
77 *
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.
82 *
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.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
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 * ====================================================================
105 *
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).
109 *
110 */
111 #include <stdio.h>
112 #include <openssl/objects.h>
113 #include "ssl_locl.h"
114
115 /* Add the client's renegotiation binding */
116 int ssl_add_clienthello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
117 int maxlen)
118 {
119 if(p)
120 {
121 if((s->s3->previous_client_finished_len+1) > maxlen)
122 {
123 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATE_EXT_TOO_LONG);
124 return 0;
125 }
126
127 /* Length byte */
128 *p = s->s3->previous_client_finished_len;
129 p++;
130
131 memcpy(p, s->s3->previous_client_finished,
132 s->s3->previous_client_finished_len);
133 #ifdef OPENSSL_RI_DEBUG
134 fprintf(stderr, "%s RI extension sent by client\n",
135 s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
136 #endif
137 }
138
139 *len=s->s3->previous_client_finished_len + 1;
140
141
142 return 1;
143 }
144
145 /* Parse the client's renegotiation binding and abort if it's not
146 right */
147 int ssl_parse_clienthello_renegotiate_ext(SSL *s, unsigned char *d, int len,
148 int *al)
149 {
150 int ilen;
151
152 /* Parse the length byte */
153 if(len < 1)
154 {
155 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
156 *al=SSL_AD_ILLEGAL_PARAMETER;
157 return 0;
158 }
159 ilen = *d;
160 d++;
161
162 /* Consistency check */
163 if((ilen+1) != len)
164 {
165 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
166 *al=SSL_AD_ILLEGAL_PARAMETER;
167 return 0;
168 }
169
170 /* Check that the extension matches */
171 if(ilen != s->s3->previous_client_finished_len)
172 {
173 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
174 *al=SSL_AD_HANDSHAKE_FAILURE;
175 return 0;
176 }
177
178 if(memcmp(d, s->s3->previous_client_finished,
179 s->s3->previous_client_finished_len))
180 {
181 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
182 *al=SSL_AD_HANDSHAKE_FAILURE;
183 return 0;
184 }
185 #ifdef OPENSSL_RI_DEBUG
186 fprintf(stderr, "%s RI extension received by server\n",
187 ilen ? "Non-empty" : "Empty");
188 #endif
189
190 s->s3->send_connection_binding=1;
191
192 return 1;
193 }
194
195 /* Add the server's renegotiation binding */
196 int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
197 int maxlen)
198 {
199 if(p)
200 {
201 if((s->s3->previous_client_finished_len +
202 s->s3->previous_server_finished_len + 1) > maxlen)
203 {
204 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATE_EXT_TOO_LONG);
205 return 0;
206 }
207
208 /* Length byte */
209 *p = s->s3->previous_client_finished_len + s->s3->previous_server_finished_len;
210 p++;
211
212 memcpy(p, s->s3->previous_client_finished,
213 s->s3->previous_client_finished_len);
214 p += s->s3->previous_client_finished_len;
215
216 memcpy(p, s->s3->previous_server_finished,
217 s->s3->previous_server_finished_len);
218 #ifdef OPENSSL_RI_DEBUG
219 fprintf(stderr, "%s RI extension sent by server\n",
220 s->s3->previous_client_finished_len ? "Non-empty" : "Empty");
221 #endif
222 }
223
224 *len=s->s3->previous_client_finished_len
225 + s->s3->previous_server_finished_len + 1;
226
227 return 1;
228 }
229
230 /* Parse the server's renegotiation binding and abort if it's not
231 right */
232 int ssl_parse_serverhello_renegotiate_ext(SSL *s, unsigned char *d, int len,
233 int *al)
234 {
235 int expected_len=s->s3->previous_client_finished_len
236 + s->s3->previous_server_finished_len;
237 int ilen;
238
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);
242
243 /* Parse the length byte */
244 if(len < 1)
245 {
246 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
247 *al=SSL_AD_ILLEGAL_PARAMETER;
248 return 0;
249 }
250 ilen = *d;
251 d++;
252
253 /* Consistency check */
254 if(ilen+1 != len)
255 {
256 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
257 *al=SSL_AD_ILLEGAL_PARAMETER;
258 return 0;
259 }
260
261 /* Check that the extension matches */
262 if(ilen != expected_len)
263 {
264 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
265 *al=SSL_AD_HANDSHAKE_FAILURE;
266 return 0;
267 }
268
269 if(memcmp(d, s->s3->previous_client_finished,
270 s->s3->previous_client_finished_len))
271 {
272 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
273 *al=SSL_AD_HANDSHAKE_FAILURE;
274 return 0;
275 }
276 d += s->s3->previous_client_finished_len;
277
278 if(memcmp(d, s->s3->previous_server_finished,
279 s->s3->previous_server_finished_len))
280 {
281 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
282 *al=SSL_AD_ILLEGAL_PARAMETER;
283 return 0;
284 }
285 #ifdef OPENSSL_RI_DEBUG
286 fprintf(stderr, "%s RI extension received by client\n",
287 ilen ? "Non-empty" : "Empty");
288 #endif
289 s->s3->send_connection_binding=1;
290
291 return 1;
292 }