Branch data 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 : : {
121 [ # # ]: 0 : if((s->s3->previous_client_finished_len+1) > maxlen)
122 : : {
123 : 0 : SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATE_EXT_TOO_LONG);
124 : 0 : return 0;
125 : : }
126 : :
127 : : /* Length byte */
128 : 0 : *p = s->s3->previous_client_finished_len;
129 : 0 : p++;
130 : :
131 : 0 : memcpy(p, s->s3->previous_client_finished,
132 : 0 : 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 : 0 : *len=s->s3->previous_client_finished_len + 1;
140 : :
141 : :
142 : 0 : return 1;
143 : : }
144 : :
145 : : /* Parse the client's renegotiation binding and abort if it's not
146 : : right */
147 : 0 : 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 [ # # ]: 0 : if(len < 1)
154 : : {
155 : 0 : SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
156 : 0 : *al=SSL_AD_ILLEGAL_PARAMETER;
157 : 0 : return 0;
158 : : }
159 : 0 : ilen = *d;
160 : 0 : d++;
161 : :
162 : : /* Consistency check */
163 [ # # ]: 0 : if((ilen+1) != len)
164 : : {
165 : 0 : SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
166 : 0 : *al=SSL_AD_ILLEGAL_PARAMETER;
167 : 0 : return 0;
168 : : }
169 : :
170 : : /* Check that the extension matches */
171 [ # # ]: 0 : if(ilen != s->s3->previous_client_finished_len)
172 : : {
173 : 0 : SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
174 : 0 : *al=SSL_AD_HANDSHAKE_FAILURE;
175 : 0 : return 0;
176 : : }
177 : :
178 [ # # ]: 0 : if(memcmp(d, s->s3->previous_client_finished,
179 : : s->s3->previous_client_finished_len))
180 : : {
181 : 0 : SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
182 : 0 : *al=SSL_AD_HANDSHAKE_FAILURE;
183 : 0 : 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 : 0 : s->s3->send_connection_binding=1;
191 : :
192 : 0 : return 1;
193 : : }
194 : :
195 : : /* Add the server's renegotiation binding */
196 : 2160 : int ssl_add_serverhello_renegotiate_ext(SSL *s, unsigned char *p, int *len,
197 : : int maxlen)
198 : : {
199 [ + + ]: 2160 : if(p)
200 : : {
201 [ - + ]: 1080 : if((s->s3->previous_client_finished_len +
202 : 1080 : s->s3->previous_server_finished_len + 1) > maxlen)
203 : : {
204 : 0 : SSLerr(SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATE_EXT_TOO_LONG);
205 : 0 : return 0;
206 : : }
207 : :
208 : : /* Length byte */
209 : 1080 : *p = s->s3->previous_client_finished_len + s->s3->previous_server_finished_len;
210 : 1080 : p++;
211 : :
212 : 1080 : memcpy(p, s->s3->previous_client_finished,
213 : 1080 : s->s3->previous_client_finished_len);
214 : 1080 : p += s->s3->previous_client_finished_len;
215 : :
216 : 1080 : memcpy(p, s->s3->previous_server_finished,
217 : 1080 : 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 : 4320 : *len=s->s3->previous_client_finished_len
225 : 2160 : + s->s3->previous_server_finished_len + 1;
226 : :
227 : 2160 : return 1;
228 : : }
229 : :
230 : : /* Parse the server's renegotiation binding and abort if it's not
231 : : right */
232 : 1080 : int ssl_parse_serverhello_renegotiate_ext(SSL *s, unsigned char *d, int len,
233 : : int *al)
234 : : {
235 : 2160 : int expected_len=s->s3->previous_client_finished_len
236 : 1080 : + s->s3->previous_server_finished_len;
237 : : int ilen;
238 : :
239 : : /* Check for logic errors */
240 [ - + ][ # # ]: 1080 : OPENSSL_assert(!expected_len || s->s3->previous_client_finished_len);
241 [ - + ][ # # ]: 1080 : OPENSSL_assert(!expected_len || s->s3->previous_server_finished_len);
242 : :
243 : : /* Parse the length byte */
244 [ - + ]: 1080 : if(len < 1)
245 : : {
246 : 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_ENCODING_ERR);
247 : 0 : *al=SSL_AD_ILLEGAL_PARAMETER;
248 : 0 : return 0;
249 : : }
250 : 1080 : ilen = *d;
251 : 1080 : d++;
252 : :
253 : : /* Consistency check */
254 [ - + ]: 1080 : if(ilen+1 != len)
255 : : {
256 : 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,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 [ - + ]: 1080 : if(ilen != expected_len)
263 : : {
264 : 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
265 : 0 : *al=SSL_AD_HANDSHAKE_FAILURE;
266 : 0 : return 0;
267 : : }
268 : :
269 [ - + ]: 1080 : if(memcmp(d, s->s3->previous_client_finished,
270 : 1080 : s->s3->previous_client_finished_len))
271 : : {
272 : 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,SSL_R_RENEGOTIATION_MISMATCH);
273 : 0 : *al=SSL_AD_HANDSHAKE_FAILURE;
274 : 0 : return 0;
275 : : }
276 : 1080 : d += s->s3->previous_client_finished_len;
277 : :
278 [ - + ]: 1080 : if(memcmp(d, s->s3->previous_server_finished,
279 : 1080 : s->s3->previous_server_finished_len))
280 : : {
281 : 0 : SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT,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 : 1080 : s->s3->send_connection_binding=1;
290 : :
291 : 1080 : return 1;
292 : : }
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