Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | } |