Line data Source code
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 0 : int ssl_add_clienthello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
117 : int maxlen)
118 : {
119 0 : if (p) {
120 0 : if ((s->s3->previous_client_finished_len + 1) > maxlen) {
121 0 : SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT,
122 : SSL_R_RENEGOTIATE_EXT_TOO_LONG);
123 0 : return 0;
124 : }
125 :
126 : /* Length byte */
127 0 : *p = s->s3->previous_client_finished_len;
128 0 : p++;
129 :
130 0 : memcpy(p, s->s3->previous_client_finished,
131 0 : 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");
135 : #endif
136 : }
137 :
138 0 : *len = s->s3->previous_client_finished_len + 1;
139 :
140 0 : return 1;
141 : }
142 :
143 : /*
144 : * Parse the client's renegotiation binding and abort if it's not right
145 : */
146 0 : int ssl_parse_clienthello_renegotiate_ext(SSL *s, unsigned char *d, int len,
147 : int *al)
148 : {
149 : int ilen;
150 :
151 : /* Parse the length byte */
152 0 : if (len < 1) {
153 0 : SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
154 : SSL_R_RENEGOTIATION_ENCODING_ERR);
155 0 : *al = SSL_AD_ILLEGAL_PARAMETER;
156 0 : return 0;
157 : }
158 0 : ilen = *d;
159 0 : d++;
160 :
161 : /* Consistency check */
162 0 : if ((ilen + 1) != len) {
163 0 : SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
164 : SSL_R_RENEGOTIATION_ENCODING_ERR);
165 0 : *al = SSL_AD_ILLEGAL_PARAMETER;
166 0 : return 0;
167 : }
168 :
169 : /* Check that the extension matches */
170 0 : if (ilen != s->s3->previous_client_finished_len) {
171 0 : SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
172 : SSL_R_RENEGOTIATION_MISMATCH);
173 0 : *al = SSL_AD_HANDSHAKE_FAILURE;
174 0 : return 0;
175 : }
176 :
177 0 : if (memcmp(d, s->s3->previous_client_finished,
178 : s->s3->previous_client_finished_len)) {
179 0 : SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,
180 : SSL_R_RENEGOTIATION_MISMATCH);
181 0 : *al = SSL_AD_HANDSHAKE_FAILURE;
182 0 : return 0;
183 : }
184 : #ifdef OPENSSL_RI_DEBUG
185 : fprintf(stderr, "%s RI extension received by server\n",
186 : ilen ? "Non-empty" : "Empty");
187 : #endif
188 :
189 0 : s->s3->send_connection_binding = 1;
190 :
191 0 : return 1;
192 : }
193 :
194 : /* Add the server's renegotiation binding */
195 746 : int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
196 : int maxlen)
197 : {
198 746 : if (p) {
199 746 : if ((s->s3->previous_client_finished_len +
200 373 : s->s3->previous_server_finished_len + 1) > maxlen) {
201 0 : SSLerr(SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT,
202 : SSL_R_RENEGOTIATE_EXT_TOO_LONG);
203 0 : return 0;
204 : }
205 :
206 : /* Length byte */
207 373 : *p = s->s3->previous_client_finished_len +
208 : s->s3->previous_server_finished_len;
209 373 : p++;
210 :
211 373 : memcpy(p, s->s3->previous_client_finished,
212 373 : s->s3->previous_client_finished_len);
213 373 : p += s->s3->previous_client_finished_len;
214 :
215 373 : memcpy(p, s->s3->previous_server_finished,
216 373 : 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");
220 : #endif
221 : }
222 :
223 1492 : *len = s->s3->previous_client_finished_len
224 746 : + s->s3->previous_server_finished_len + 1;
225 :
226 746 : return 1;
227 : }
228 :
229 : /*
230 : * Parse the server's renegotiation binding and abort if it's not right
231 : */
232 370 : int ssl_parse_serverhello_renegotiate_ext(SSL *s, unsigned char *d, int len,
233 : int *al)
234 : {
235 740 : int expected_len = s->s3->previous_client_finished_len
236 370 : + s->s3->previous_server_finished_len;
237 : int ilen;
238 :
239 : /* Check for logic errors */
240 370 : OPENSSL_assert(!expected_len || s->s3->previous_client_finished_len);
241 370 : OPENSSL_assert(!expected_len || s->s3->previous_server_finished_len);
242 :
243 : /* Parse the length byte */
244 370 : if (len < 1) {
245 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
246 : SSL_R_RENEGOTIATION_ENCODING_ERR);
247 0 : *al = SSL_AD_ILLEGAL_PARAMETER;
248 0 : return 0;
249 : }
250 370 : ilen = *d;
251 370 : d++;
252 :
253 : /* Consistency check */
254 370 : if (ilen + 1 != len) {
255 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
256 : SSL_R_RENEGOTIATION_ENCODING_ERR);
257 0 : *al = SSL_AD_ILLEGAL_PARAMETER;
258 0 : return 0;
259 : }
260 :
261 : /* Check that the extension matches */
262 370 : if (ilen != expected_len) {
263 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
264 : SSL_R_RENEGOTIATION_MISMATCH);
265 0 : *al = SSL_AD_HANDSHAKE_FAILURE;
266 0 : return 0;
267 : }
268 :
269 370 : if (memcmp(d, s->s3->previous_client_finished,
270 370 : s->s3->previous_client_finished_len)) {
271 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
272 : SSL_R_RENEGOTIATION_MISMATCH);
273 0 : *al = SSL_AD_HANDSHAKE_FAILURE;
274 0 : return 0;
275 : }
276 370 : d += s->s3->previous_client_finished_len;
277 :
278 370 : if (memcmp(d, s->s3->previous_server_finished,
279 370 : s->s3->previous_server_finished_len)) {
280 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,
281 : SSL_R_RENEGOTIATION_MISMATCH);
282 0 : *al = SSL_AD_ILLEGAL_PARAMETER;
283 0 : 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
289 370 : s->s3->send_connection_binding = 1;
290 :
291 370 : return 1;
292 : }
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