Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame^] | 1 | /* ssl/t1_enc.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) 1998-2007 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 | /* ==================================================================== |
| 112 | * Copyright 2005 Nokia. All rights reserved. |
| 113 | * |
| 114 | * The portions of the attached software ("Contribution") is developed by |
| 115 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source |
| 116 | * license. |
| 117 | * |
| 118 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of |
| 119 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites |
| 120 | * support (see RFC 4279) to OpenSSL. |
| 121 | * |
| 122 | * No patent licenses or other rights except those expressly stated in |
| 123 | * the OpenSSL open source license shall be deemed granted or received |
| 124 | * expressly, by implication, estoppel, or otherwise. |
| 125 | * |
| 126 | * No assurances are provided by Nokia that the Contribution does not |
| 127 | * infringe the patent or other intellectual property rights of any third |
| 128 | * party or that the license provides you with all the necessary rights |
| 129 | * to make use of the Contribution. |
| 130 | * |
| 131 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN |
| 132 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA |
| 133 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY |
| 134 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR |
| 135 | * OTHERWISE. |
| 136 | */ |
| 137 | |
| 138 | #include <stdio.h> |
| 139 | #include "ssl_locl.h" |
| 140 | #ifndef OPENSSL_NO_COMP |
| 141 | #include <openssl/comp.h> |
| 142 | #endif |
| 143 | #include <openssl/evp.h> |
| 144 | #include <openssl/hmac.h> |
| 145 | #include <openssl/md5.h> |
| 146 | #include <openssl/rand.h> |
| 147 | #ifdef KSSL_DEBUG |
| 148 | #include <openssl/des.h> |
| 149 | #endif |
| 150 | |
| 151 | /* seed1 through seed5 are virtually concatenated */ |
| 152 | static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec, |
| 153 | int sec_len, |
| 154 | const void *seed1, int seed1_len, |
| 155 | const void *seed2, int seed2_len, |
| 156 | const void *seed3, int seed3_len, |
| 157 | const void *seed4, int seed4_len, |
| 158 | const void *seed5, int seed5_len, |
| 159 | unsigned char *out, int olen) |
| 160 | { |
| 161 | int chunk; |
| 162 | size_t j; |
| 163 | EVP_MD_CTX ctx, ctx_tmp; |
| 164 | EVP_PKEY *mac_key; |
| 165 | unsigned char A1[EVP_MAX_MD_SIZE]; |
| 166 | size_t A1_len; |
| 167 | int ret = 0; |
| 168 | |
| 169 | chunk=EVP_MD_size(md); |
| 170 | OPENSSL_assert(chunk >= 0); |
| 171 | |
| 172 | EVP_MD_CTX_init(&ctx); |
| 173 | EVP_MD_CTX_init(&ctx_tmp); |
| 174 | EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); |
| 175 | EVP_MD_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); |
| 176 | mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len); |
| 177 | if (!mac_key) |
| 178 | goto err; |
| 179 | if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key)) |
| 180 | goto err; |
| 181 | if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key)) |
| 182 | goto err; |
| 183 | if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len)) |
| 184 | goto err; |
| 185 | if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len)) |
| 186 | goto err; |
| 187 | if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len)) |
| 188 | goto err; |
| 189 | if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len)) |
| 190 | goto err; |
| 191 | if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len)) |
| 192 | goto err; |
| 193 | if (!EVP_DigestSignFinal(&ctx,A1,&A1_len)) |
| 194 | goto err; |
| 195 | |
| 196 | for (;;) |
| 197 | { |
| 198 | /* Reinit mac contexts */ |
| 199 | if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key)) |
| 200 | goto err; |
| 201 | if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key)) |
| 202 | goto err; |
| 203 | if (!EVP_DigestSignUpdate(&ctx,A1,A1_len)) |
| 204 | goto err; |
| 205 | if (!EVP_DigestSignUpdate(&ctx_tmp,A1,A1_len)) |
| 206 | goto err; |
| 207 | if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len)) |
| 208 | goto err; |
| 209 | if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len)) |
| 210 | goto err; |
| 211 | if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len)) |
| 212 | goto err; |
| 213 | if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len)) |
| 214 | goto err; |
| 215 | if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len)) |
| 216 | goto err; |
| 217 | |
| 218 | if (olen > chunk) |
| 219 | { |
| 220 | if (!EVP_DigestSignFinal(&ctx,out,&j)) |
| 221 | goto err; |
| 222 | out+=j; |
| 223 | olen-=j; |
| 224 | /* calc the next A1 value */ |
| 225 | if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len)) |
| 226 | goto err; |
| 227 | } |
| 228 | else /* last one */ |
| 229 | { |
| 230 | if (!EVP_DigestSignFinal(&ctx,A1,&A1_len)) |
| 231 | goto err; |
| 232 | memcpy(out,A1,olen); |
| 233 | break; |
| 234 | } |
| 235 | } |
| 236 | ret = 1; |
| 237 | err: |
| 238 | EVP_PKEY_free(mac_key); |
| 239 | EVP_MD_CTX_cleanup(&ctx); |
| 240 | EVP_MD_CTX_cleanup(&ctx_tmp); |
| 241 | OPENSSL_cleanse(A1,sizeof(A1)); |
| 242 | return ret; |
| 243 | } |
| 244 | |
| 245 | /* seed1 through seed5 are virtually concatenated */ |
| 246 | static int tls1_PRF(long digest_mask, |
| 247 | const void *seed1, int seed1_len, |
| 248 | const void *seed2, int seed2_len, |
| 249 | const void *seed3, int seed3_len, |
| 250 | const void *seed4, int seed4_len, |
| 251 | const void *seed5, int seed5_len, |
| 252 | const unsigned char *sec, int slen, |
| 253 | unsigned char *out1, |
| 254 | unsigned char *out2, int olen) |
| 255 | { |
| 256 | int len,i,idx,count; |
| 257 | const unsigned char *S1; |
| 258 | long m; |
| 259 | const EVP_MD *md; |
| 260 | int ret = 0; |
| 261 | |
| 262 | /* Count number of digests and partition sec evenly */ |
| 263 | count=0; |
| 264 | for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) { |
| 265 | if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++; |
| 266 | } |
| 267 | len=slen/count; |
| 268 | if (count == 1) |
| 269 | slen = 0; |
| 270 | S1=sec; |
| 271 | memset(out1,0,olen); |
| 272 | for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) { |
| 273 | if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) { |
| 274 | if (!md) { |
| 275 | SSLerr(SSL_F_TLS1_PRF, |
| 276 | SSL_R_UNSUPPORTED_DIGEST_TYPE); |
| 277 | goto err; |
| 278 | } |
| 279 | if (!tls1_P_hash(md ,S1,len+(slen&1), |
| 280 | seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len, |
| 281 | out2,olen)) |
| 282 | goto err; |
| 283 | S1+=len; |
| 284 | for (i=0; i<olen; i++) |
| 285 | { |
| 286 | out1[i]^=out2[i]; |
| 287 | } |
| 288 | } |
| 289 | } |
| 290 | ret = 1; |
| 291 | err: |
| 292 | return ret; |
| 293 | } |
| 294 | static int tls1_generate_key_block(SSL *s, unsigned char *km, |
| 295 | unsigned char *tmp, int num) |
| 296 | { |
| 297 | int ret; |
| 298 | ret = tls1_PRF(ssl_get_algorithm2(s), |
| 299 | TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE, |
| 300 | s->s3->server_random,SSL3_RANDOM_SIZE, |
| 301 | s->s3->client_random,SSL3_RANDOM_SIZE, |
| 302 | NULL,0,NULL,0, |
| 303 | s->session->master_key,s->session->master_key_length, |
| 304 | km,tmp,num); |
| 305 | #ifdef KSSL_DEBUG |
| 306 | printf("tls1_generate_key_block() ==> %d byte master_key =\n\t", |
| 307 | s->session->master_key_length); |
| 308 | { |
| 309 | int i; |
| 310 | for (i=0; i < s->session->master_key_length; i++) |
| 311 | { |
| 312 | printf("%02X", s->session->master_key[i]); |
| 313 | } |
| 314 | printf("\n"); } |
| 315 | #endif /* KSSL_DEBUG */ |
| 316 | return ret; |
| 317 | } |
| 318 | |
| 319 | int tls1_change_cipher_state(SSL *s, int which) |
| 320 | { |
| 321 | static const unsigned char empty[]=""; |
| 322 | unsigned char *p,*mac_secret; |
| 323 | unsigned char *exp_label; |
| 324 | unsigned char tmp1[EVP_MAX_KEY_LENGTH]; |
| 325 | unsigned char tmp2[EVP_MAX_KEY_LENGTH]; |
| 326 | unsigned char iv1[EVP_MAX_IV_LENGTH*2]; |
| 327 | unsigned char iv2[EVP_MAX_IV_LENGTH*2]; |
| 328 | unsigned char *ms,*key,*iv; |
| 329 | int client_write; |
| 330 | EVP_CIPHER_CTX *dd; |
| 331 | const EVP_CIPHER *c; |
| 332 | #ifndef OPENSSL_NO_COMP |
| 333 | const SSL_COMP *comp; |
| 334 | #endif |
| 335 | const EVP_MD *m; |
| 336 | int mac_type; |
| 337 | int *mac_secret_size; |
| 338 | EVP_MD_CTX *mac_ctx; |
| 339 | EVP_PKEY *mac_key; |
| 340 | int is_export,n,i,j,k,exp_label_len,cl; |
| 341 | int reuse_dd = 0; |
| 342 | |
| 343 | is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); |
| 344 | c=s->s3->tmp.new_sym_enc; |
| 345 | m=s->s3->tmp.new_hash; |
| 346 | mac_type = s->s3->tmp.new_mac_pkey_type; |
| 347 | #ifndef OPENSSL_NO_COMP |
| 348 | comp=s->s3->tmp.new_compression; |
| 349 | #endif |
| 350 | |
| 351 | #ifdef KSSL_DEBUG |
| 352 | printf("tls1_change_cipher_state(which= %d) w/\n", which); |
| 353 | printf("\talg= %ld/%ld, comp= %p\n", |
| 354 | s->s3->tmp.new_cipher->algorithm_mkey, |
| 355 | s->s3->tmp.new_cipher->algorithm_auth, |
| 356 | comp); |
| 357 | printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c); |
| 358 | printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n", |
| 359 | c->nid,c->block_size,c->key_len,c->iv_len); |
| 360 | printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length); |
| 361 | { |
| 362 | int i; |
| 363 | for (i=0; i<s->s3->tmp.key_block_length; i++) |
| 364 | printf("%02x", key_block[i]); printf("\n"); |
| 365 | } |
| 366 | #endif /* KSSL_DEBUG */ |
| 367 | |
| 368 | if (which & SSL3_CC_READ) |
| 369 | { |
| 370 | if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) |
| 371 | s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM; |
| 372 | else |
| 373 | s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM; |
| 374 | |
| 375 | if (s->enc_read_ctx != NULL) |
| 376 | reuse_dd = 1; |
| 377 | else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) |
| 378 | goto err; |
| 379 | else |
| 380 | /* make sure it's intialized in case we exit later with an error */ |
| 381 | EVP_CIPHER_CTX_init(s->enc_read_ctx); |
| 382 | dd= s->enc_read_ctx; |
| 383 | mac_ctx=ssl_replace_hash(&s->read_hash,NULL); |
| 384 | #ifndef OPENSSL_NO_COMP |
| 385 | if (s->expand != NULL) |
| 386 | { |
| 387 | COMP_CTX_free(s->expand); |
| 388 | s->expand=NULL; |
| 389 | } |
| 390 | if (comp != NULL) |
| 391 | { |
| 392 | s->expand=COMP_CTX_new(comp->method); |
| 393 | if (s->expand == NULL) |
| 394 | { |
| 395 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); |
| 396 | goto err2; |
| 397 | } |
| 398 | if (s->s3->rrec.comp == NULL) |
| 399 | s->s3->rrec.comp=(unsigned char *) |
| 400 | OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); |
| 401 | if (s->s3->rrec.comp == NULL) |
| 402 | goto err; |
| 403 | } |
| 404 | #endif |
| 405 | /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ |
| 406 | if (s->version != DTLS1_VERSION) |
| 407 | memset(&(s->s3->read_sequence[0]),0,8); |
| 408 | mac_secret= &(s->s3->read_mac_secret[0]); |
| 409 | mac_secret_size=&(s->s3->read_mac_secret_size); |
| 410 | } |
| 411 | else |
| 412 | { |
| 413 | if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) |
| 414 | s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM; |
| 415 | else |
| 416 | s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM; |
| 417 | if (s->enc_write_ctx != NULL) |
| 418 | reuse_dd = 1; |
| 419 | else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) |
| 420 | goto err; |
| 421 | else |
| 422 | /* make sure it's intialized in case we exit later with an error */ |
| 423 | EVP_CIPHER_CTX_init(s->enc_write_ctx); |
| 424 | dd= s->enc_write_ctx; |
| 425 | mac_ctx = ssl_replace_hash(&s->write_hash,NULL); |
| 426 | #ifndef OPENSSL_NO_COMP |
| 427 | if (s->compress != NULL) |
| 428 | { |
| 429 | COMP_CTX_free(s->compress); |
| 430 | s->compress=NULL; |
| 431 | } |
| 432 | if (comp != NULL) |
| 433 | { |
| 434 | s->compress=COMP_CTX_new(comp->method); |
| 435 | if (s->compress == NULL) |
| 436 | { |
| 437 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); |
| 438 | goto err2; |
| 439 | } |
| 440 | } |
| 441 | #endif |
| 442 | /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ |
| 443 | if (s->version != DTLS1_VERSION) |
| 444 | memset(&(s->s3->write_sequence[0]),0,8); |
| 445 | mac_secret= &(s->s3->write_mac_secret[0]); |
| 446 | mac_secret_size = &(s->s3->write_mac_secret_size); |
| 447 | } |
| 448 | |
| 449 | if (reuse_dd) |
| 450 | EVP_CIPHER_CTX_cleanup(dd); |
| 451 | |
| 452 | p=s->s3->tmp.key_block; |
| 453 | i=*mac_secret_size=s->s3->tmp.new_mac_secret_size; |
| 454 | |
| 455 | cl=EVP_CIPHER_key_length(c); |
| 456 | j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? |
| 457 | cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; |
| 458 | /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ |
| 459 | /* If GCM mode only part of IV comes from PRF */ |
| 460 | if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) |
| 461 | k = EVP_GCM_TLS_FIXED_IV_LEN; |
| 462 | else |
| 463 | k=EVP_CIPHER_iv_length(c); |
| 464 | if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || |
| 465 | (which == SSL3_CHANGE_CIPHER_SERVER_READ)) |
| 466 | { |
| 467 | ms= &(p[ 0]); n=i+i; |
| 468 | key= &(p[ n]); n+=j+j; |
| 469 | iv= &(p[ n]); n+=k+k; |
| 470 | exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; |
| 471 | exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; |
| 472 | client_write=1; |
| 473 | } |
| 474 | else |
| 475 | { |
| 476 | n=i; |
| 477 | ms= &(p[ n]); n+=i+j; |
| 478 | key= &(p[ n]); n+=j+k; |
| 479 | iv= &(p[ n]); n+=k; |
| 480 | exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; |
| 481 | exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; |
| 482 | client_write=0; |
| 483 | } |
| 484 | |
| 485 | if (n > s->s3->tmp.key_block_length) |
| 486 | { |
| 487 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); |
| 488 | goto err2; |
| 489 | } |
| 490 | |
| 491 | memcpy(mac_secret,ms,i); |
| 492 | |
| 493 | if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER)) |
| 494 | { |
| 495 | mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, |
| 496 | mac_secret,*mac_secret_size); |
| 497 | EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key); |
| 498 | EVP_PKEY_free(mac_key); |
| 499 | } |
| 500 | #ifdef TLS_DEBUG |
| 501 | printf("which = %04X\nmac key=",which); |
| 502 | { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } |
| 503 | #endif |
| 504 | if (is_export) |
| 505 | { |
| 506 | /* In here I set both the read and write key/iv to the |
| 507 | * same value since only the correct one will be used :-). |
| 508 | */ |
| 509 | if (!tls1_PRF(ssl_get_algorithm2(s), |
| 510 | exp_label,exp_label_len, |
| 511 | s->s3->client_random,SSL3_RANDOM_SIZE, |
| 512 | s->s3->server_random,SSL3_RANDOM_SIZE, |
| 513 | NULL,0,NULL,0, |
| 514 | key,j,tmp1,tmp2,EVP_CIPHER_key_length(c))) |
| 515 | goto err2; |
| 516 | key=tmp1; |
| 517 | |
| 518 | if (k > 0) |
| 519 | { |
| 520 | if (!tls1_PRF(ssl_get_algorithm2(s), |
| 521 | TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE, |
| 522 | s->s3->client_random,SSL3_RANDOM_SIZE, |
| 523 | s->s3->server_random,SSL3_RANDOM_SIZE, |
| 524 | NULL,0,NULL,0, |
| 525 | empty,0,iv1,iv2,k*2)) |
| 526 | goto err2; |
| 527 | if (client_write) |
| 528 | iv=iv1; |
| 529 | else |
| 530 | iv= &(iv1[k]); |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | s->session->key_arg_length=0; |
| 535 | #ifdef KSSL_DEBUG |
| 536 | { |
| 537 | int i; |
| 538 | printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); |
| 539 | printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]); |
| 540 | printf("\n"); |
| 541 | printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]); |
| 542 | printf("\n"); |
| 543 | } |
| 544 | #endif /* KSSL_DEBUG */ |
| 545 | |
| 546 | if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) |
| 547 | { |
| 548 | EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE)); |
| 549 | EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv); |
| 550 | } |
| 551 | else |
| 552 | EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); |
| 553 | |
| 554 | /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */ |
| 555 | if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size) |
| 556 | EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY, |
| 557 | *mac_secret_size,mac_secret); |
| 558 | |
| 559 | #ifdef TLS_DEBUG |
| 560 | printf("which = %04X\nkey=",which); |
| 561 | { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } |
| 562 | printf("\niv="); |
| 563 | { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } |
| 564 | printf("\n"); |
| 565 | #endif |
| 566 | |
| 567 | OPENSSL_cleanse(tmp1,sizeof(tmp1)); |
| 568 | OPENSSL_cleanse(tmp2,sizeof(tmp1)); |
| 569 | OPENSSL_cleanse(iv1,sizeof(iv1)); |
| 570 | OPENSSL_cleanse(iv2,sizeof(iv2)); |
| 571 | return(1); |
| 572 | err: |
| 573 | SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); |
| 574 | err2: |
| 575 | return(0); |
| 576 | } |
| 577 | |
| 578 | int tls1_setup_key_block(SSL *s) |
| 579 | { |
| 580 | unsigned char *p1,*p2=NULL; |
| 581 | const EVP_CIPHER *c; |
| 582 | const EVP_MD *hash; |
| 583 | int num; |
| 584 | SSL_COMP *comp; |
| 585 | int mac_type= NID_undef,mac_secret_size=0; |
| 586 | int ret=0; |
| 587 | |
| 588 | #ifdef KSSL_DEBUG |
| 589 | printf ("tls1_setup_key_block()\n"); |
| 590 | #endif /* KSSL_DEBUG */ |
| 591 | |
| 592 | if (s->s3->tmp.key_block_length != 0) |
| 593 | return(1); |
| 594 | |
| 595 | if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp)) |
| 596 | { |
| 597 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); |
| 598 | return(0); |
| 599 | } |
| 600 | |
| 601 | s->s3->tmp.new_sym_enc=c; |
| 602 | s->s3->tmp.new_hash=hash; |
| 603 | s->s3->tmp.new_mac_pkey_type = mac_type; |
| 604 | s->s3->tmp.new_mac_secret_size = mac_secret_size; |
| 605 | num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c); |
| 606 | num*=2; |
| 607 | |
| 608 | ssl3_cleanup_key_block(s); |
| 609 | |
| 610 | if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) |
| 611 | { |
| 612 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); |
| 613 | goto err; |
| 614 | } |
| 615 | |
| 616 | s->s3->tmp.key_block_length=num; |
| 617 | s->s3->tmp.key_block=p1; |
| 618 | |
| 619 | if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) |
| 620 | { |
| 621 | SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); |
| 622 | goto err; |
| 623 | } |
| 624 | |
| 625 | #ifdef TLS_DEBUG |
| 626 | printf("client random\n"); |
| 627 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } |
| 628 | printf("server random\n"); |
| 629 | { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } |
| 630 | printf("pre-master\n"); |
| 631 | { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } |
| 632 | #endif |
| 633 | if (!tls1_generate_key_block(s,p1,p2,num)) |
| 634 | goto err; |
| 635 | #ifdef TLS_DEBUG |
| 636 | printf("\nkey block\n"); |
| 637 | { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } |
| 638 | #endif |
| 639 | |
| 640 | if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) |
| 641 | && s->method->version <= TLS1_VERSION) |
| 642 | { |
| 643 | /* enable vulnerability countermeasure for CBC ciphers with |
| 644 | * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt) |
| 645 | */ |
| 646 | s->s3->need_empty_fragments = 1; |
| 647 | |
| 648 | if (s->session->cipher != NULL) |
| 649 | { |
| 650 | if (s->session->cipher->algorithm_enc == SSL_eNULL) |
| 651 | s->s3->need_empty_fragments = 0; |
| 652 | |
| 653 | #ifndef OPENSSL_NO_RC4 |
| 654 | if (s->session->cipher->algorithm_enc == SSL_RC4) |
| 655 | s->s3->need_empty_fragments = 0; |
| 656 | #endif |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | ret = 1; |
| 661 | err: |
| 662 | if (p2) |
| 663 | { |
| 664 | OPENSSL_cleanse(p2,num); |
| 665 | OPENSSL_free(p2); |
| 666 | } |
| 667 | return(ret); |
| 668 | } |
| 669 | |
| 670 | int tls1_enc(SSL *s, int send) |
| 671 | { |
| 672 | SSL3_RECORD *rec; |
| 673 | EVP_CIPHER_CTX *ds; |
| 674 | unsigned long l; |
| 675 | int bs,i,ii,j,k,pad=0; |
| 676 | const EVP_CIPHER *enc; |
| 677 | |
| 678 | if (send) |
| 679 | { |
| 680 | if (EVP_MD_CTX_md(s->write_hash)) |
| 681 | { |
| 682 | int n=EVP_MD_CTX_size(s->write_hash); |
| 683 | OPENSSL_assert(n >= 0); |
| 684 | } |
| 685 | ds=s->enc_write_ctx; |
| 686 | rec= &(s->s3->wrec); |
| 687 | if (s->enc_write_ctx == NULL) |
| 688 | enc=NULL; |
| 689 | else |
| 690 | { |
| 691 | int ivlen; |
| 692 | enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); |
| 693 | /* For TLSv1.1 and later explicit IV */ |
| 694 | if (s->version >= TLS1_1_VERSION |
| 695 | && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE) |
| 696 | ivlen = EVP_CIPHER_iv_length(enc); |
| 697 | else |
| 698 | ivlen = 0; |
| 699 | if (ivlen > 1) |
| 700 | { |
| 701 | if ( rec->data != rec->input) |
| 702 | /* we can't write into the input stream: |
| 703 | * Can this ever happen?? (steve) |
| 704 | */ |
| 705 | fprintf(stderr, |
| 706 | "%s:%d: rec->data != rec->input\n", |
| 707 | __FILE__, __LINE__); |
| 708 | else if (RAND_bytes(rec->input, ivlen) <= 0) |
| 709 | return -1; |
| 710 | } |
| 711 | } |
| 712 | } |
| 713 | else |
| 714 | { |
| 715 | if (EVP_MD_CTX_md(s->read_hash)) |
| 716 | { |
| 717 | int n=EVP_MD_CTX_size(s->read_hash); |
| 718 | OPENSSL_assert(n >= 0); |
| 719 | } |
| 720 | ds=s->enc_read_ctx; |
| 721 | rec= &(s->s3->rrec); |
| 722 | if (s->enc_read_ctx == NULL) |
| 723 | enc=NULL; |
| 724 | else |
| 725 | enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); |
| 726 | } |
| 727 | |
| 728 | #ifdef KSSL_DEBUG |
| 729 | printf("tls1_enc(%d)\n", send); |
| 730 | #endif /* KSSL_DEBUG */ |
| 731 | |
| 732 | if ((s->session == NULL) || (ds == NULL) || |
| 733 | (enc == NULL)) |
| 734 | { |
| 735 | memmove(rec->data,rec->input,rec->length); |
| 736 | rec->input=rec->data; |
| 737 | } |
| 738 | else |
| 739 | { |
| 740 | l=rec->length; |
| 741 | bs=EVP_CIPHER_block_size(ds->cipher); |
| 742 | |
| 743 | if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER) |
| 744 | { |
| 745 | unsigned char buf[13],*seq; |
| 746 | |
| 747 | seq = send?s->s3->write_sequence:s->s3->read_sequence; |
| 748 | |
| 749 | if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) |
| 750 | { |
| 751 | unsigned char dtlsseq[9],*p=dtlsseq; |
| 752 | |
| 753 | s2n(send?s->d1->w_epoch:s->d1->r_epoch,p); |
| 754 | memcpy(p,&seq[2],6); |
| 755 | memcpy(buf,dtlsseq,8); |
| 756 | } |
| 757 | else |
| 758 | { |
| 759 | memcpy(buf,seq,8); |
| 760 | for (i=7; i>=0; i--) /* increment */ |
| 761 | { |
| 762 | ++seq[i]; |
| 763 | if (seq[i] != 0) break; |
| 764 | } |
| 765 | } |
| 766 | |
| 767 | buf[8]=rec->type; |
| 768 | buf[9]=(unsigned char)(s->version>>8); |
| 769 | buf[10]=(unsigned char)(s->version); |
| 770 | buf[11]=rec->length>>8; |
| 771 | buf[12]=rec->length&0xff; |
| 772 | pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf); |
| 773 | if (send) |
| 774 | { |
| 775 | l+=pad; |
| 776 | rec->length+=pad; |
| 777 | } |
| 778 | } |
| 779 | else if ((bs != 1) && send) |
| 780 | { |
| 781 | i=bs-((int)l%bs); |
| 782 | |
| 783 | /* Add weird padding of upto 256 bytes */ |
| 784 | |
| 785 | /* we need to add 'i' padding bytes of value j */ |
| 786 | j=i-1; |
| 787 | if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) |
| 788 | { |
| 789 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) |
| 790 | j++; |
| 791 | } |
| 792 | for (k=(int)l; k<(int)(l+i); k++) |
| 793 | rec->input[k]=j; |
| 794 | l+=i; |
| 795 | rec->length+=i; |
| 796 | } |
| 797 | |
| 798 | #ifdef KSSL_DEBUG |
| 799 | { |
| 800 | unsigned long ui; |
| 801 | printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", |
| 802 | ds,rec->data,rec->input,l); |
| 803 | printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n", |
| 804 | ds->buf_len, ds->cipher->key_len, |
| 805 | DES_KEY_SZ, DES_SCHEDULE_SZ, |
| 806 | ds->cipher->iv_len); |
| 807 | printf("\t\tIV: "); |
| 808 | for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); |
| 809 | printf("\n"); |
| 810 | printf("\trec->input="); |
| 811 | for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); |
| 812 | printf("\n"); |
| 813 | } |
| 814 | #endif /* KSSL_DEBUG */ |
| 815 | |
| 816 | if (!send) |
| 817 | { |
| 818 | if (l == 0 || l%bs != 0) |
| 819 | { |
| 820 | if (s->version >= TLS1_1_VERSION) |
| 821 | return -1; |
| 822 | SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); |
| 823 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); |
| 824 | return 0; |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | i = EVP_Cipher(ds,rec->data,rec->input,l); |
| 829 | if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER) |
| 830 | ?(i<0) |
| 831 | :(i==0)) |
| 832 | return -1; /* AEAD can fail to verify MAC */ |
| 833 | if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) |
| 834 | { |
| 835 | rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN; |
| 836 | rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN; |
| 837 | rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN; |
| 838 | } |
| 839 | |
| 840 | #ifdef KSSL_DEBUG |
| 841 | { |
| 842 | unsigned long i; |
| 843 | printf("\trec->data="); |
| 844 | for (i=0; i<l; i++) |
| 845 | printf(" %02x", rec->data[i]); printf("\n"); |
| 846 | } |
| 847 | #endif /* KSSL_DEBUG */ |
| 848 | |
| 849 | if ((bs != 1) && !send) |
| 850 | { |
| 851 | ii=i=rec->data[l-1]; /* padding_length */ |
| 852 | i++; |
| 853 | /* NB: if compression is in operation the first packet |
| 854 | * may not be of even length so the padding bug check |
| 855 | * cannot be performed. This bug workaround has been |
| 856 | * around since SSLeay so hopefully it is either fixed |
| 857 | * now or no buggy implementation supports compression |
| 858 | * [steve] |
| 859 | */ |
| 860 | if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) |
| 861 | && !s->expand) |
| 862 | { |
| 863 | /* First packet is even in size, so check */ |
| 864 | if ((memcmp(s->s3->read_sequence, |
| 865 | "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) |
| 866 | s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; |
| 867 | if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) |
| 868 | i--; |
| 869 | } |
| 870 | /* TLS 1.0 does not bound the number of padding bytes by the block size. |
| 871 | * All of them must have value 'padding_length'. */ |
| 872 | if (i > (int)rec->length) |
| 873 | { |
| 874 | /* Incorrect padding. SSLerr() and ssl3_alert are done |
| 875 | * by caller: we don't want to reveal whether this is |
| 876 | * a decryption error or a MAC verification failure |
| 877 | * (see http://www.openssl.org/~bodo/tls-cbc.txt) */ |
| 878 | return -1; |
| 879 | } |
| 880 | for (j=(int)(l-i); j<(int)l; j++) |
| 881 | { |
| 882 | if (rec->data[j] != ii) |
| 883 | { |
| 884 | /* Incorrect padding */ |
| 885 | return -1; |
| 886 | } |
| 887 | } |
| 888 | rec->length -=i; |
| 889 | if (s->version >= TLS1_1_VERSION |
| 890 | && EVP_CIPHER_CTX_mode(ds) == EVP_CIPH_CBC_MODE) |
| 891 | { |
| 892 | if (bs > (int)rec->length) |
| 893 | return -1; |
| 894 | rec->data += bs; /* skip the explicit IV */ |
| 895 | rec->input += bs; |
| 896 | rec->length -= bs; |
| 897 | } |
| 898 | } |
| 899 | if (pad && !send) |
| 900 | rec->length -= pad; |
| 901 | } |
| 902 | return(1); |
| 903 | } |
| 904 | int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out) |
| 905 | { |
| 906 | unsigned int ret; |
| 907 | EVP_MD_CTX ctx, *d=NULL; |
| 908 | int i; |
| 909 | |
| 910 | if (s->s3->handshake_buffer) |
| 911 | if (!ssl3_digest_cached_records(s)) |
| 912 | return 0; |
| 913 | |
| 914 | for (i=0;i<SSL_MAX_DIGEST;i++) |
| 915 | { |
| 916 | if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid) |
| 917 | { |
| 918 | d=s->s3->handshake_dgst[i]; |
| 919 | break; |
| 920 | } |
| 921 | } |
| 922 | if (!d) { |
| 923 | SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST); |
| 924 | return 0; |
| 925 | } |
| 926 | |
| 927 | EVP_MD_CTX_init(&ctx); |
| 928 | EVP_MD_CTX_copy_ex(&ctx,d); |
| 929 | EVP_DigestFinal_ex(&ctx,out,&ret); |
| 930 | EVP_MD_CTX_cleanup(&ctx); |
| 931 | return((int)ret); |
| 932 | } |
| 933 | |
| 934 | int tls1_final_finish_mac(SSL *s, |
| 935 | const char *str, int slen, unsigned char *out) |
| 936 | { |
| 937 | unsigned int i; |
| 938 | EVP_MD_CTX ctx; |
| 939 | unsigned char buf[2*EVP_MAX_MD_SIZE]; |
| 940 | unsigned char *q,buf2[12]; |
| 941 | int idx; |
| 942 | long mask; |
| 943 | int err=0; |
| 944 | const EVP_MD *md; |
| 945 | |
| 946 | q=buf; |
| 947 | |
| 948 | if (s->s3->handshake_buffer) |
| 949 | if (!ssl3_digest_cached_records(s)) |
| 950 | return 0; |
| 951 | |
| 952 | EVP_MD_CTX_init(&ctx); |
| 953 | |
| 954 | for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++) |
| 955 | { |
| 956 | if (mask & ssl_get_algorithm2(s)) |
| 957 | { |
| 958 | int hashsize = EVP_MD_size(md); |
| 959 | if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf))) |
| 960 | { |
| 961 | /* internal error: 'buf' is too small for this cipersuite! */ |
| 962 | err = 1; |
| 963 | } |
| 964 | else |
| 965 | { |
| 966 | EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]); |
| 967 | EVP_DigestFinal_ex(&ctx,q,&i); |
| 968 | if (i != (unsigned int)hashsize) /* can't really happen */ |
| 969 | err = 1; |
| 970 | q+=i; |
| 971 | } |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | if (!tls1_PRF(ssl_get_algorithm2(s), |
| 976 | str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0, |
| 977 | s->session->master_key,s->session->master_key_length, |
| 978 | out,buf2,sizeof buf2)) |
| 979 | err = 1; |
| 980 | EVP_MD_CTX_cleanup(&ctx); |
| 981 | |
| 982 | if (err) |
| 983 | return 0; |
| 984 | else |
| 985 | return sizeof buf2; |
| 986 | } |
| 987 | |
| 988 | int tls1_mac(SSL *ssl, unsigned char *md, int send) |
| 989 | { |
| 990 | SSL3_RECORD *rec; |
| 991 | unsigned char *seq; |
| 992 | EVP_MD_CTX *hash; |
| 993 | size_t md_size; |
| 994 | int i; |
| 995 | EVP_MD_CTX hmac, *mac_ctx; |
| 996 | unsigned char buf[5]; |
| 997 | int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM)); |
| 998 | int t; |
| 999 | |
| 1000 | if (send) |
| 1001 | { |
| 1002 | rec= &(ssl->s3->wrec); |
| 1003 | seq= &(ssl->s3->write_sequence[0]); |
| 1004 | hash=ssl->write_hash; |
| 1005 | } |
| 1006 | else |
| 1007 | { |
| 1008 | rec= &(ssl->s3->rrec); |
| 1009 | seq= &(ssl->s3->read_sequence[0]); |
| 1010 | hash=ssl->read_hash; |
| 1011 | } |
| 1012 | |
| 1013 | t=EVP_MD_CTX_size(hash); |
| 1014 | OPENSSL_assert(t >= 0); |
| 1015 | md_size=t; |
| 1016 | |
| 1017 | buf[0]=rec->type; |
| 1018 | buf[1]=(unsigned char)(ssl->version>>8); |
| 1019 | buf[2]=(unsigned char)(ssl->version); |
| 1020 | buf[3]=rec->length>>8; |
| 1021 | buf[4]=rec->length&0xff; |
| 1022 | |
| 1023 | /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ |
| 1024 | if (stream_mac) |
| 1025 | { |
| 1026 | mac_ctx = hash; |
| 1027 | } |
| 1028 | else |
| 1029 | { |
| 1030 | EVP_MD_CTX_copy(&hmac,hash); |
| 1031 | mac_ctx = &hmac; |
| 1032 | } |
| 1033 | |
| 1034 | if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) |
| 1035 | { |
| 1036 | unsigned char dtlsseq[8],*p=dtlsseq; |
| 1037 | |
| 1038 | s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); |
| 1039 | memcpy (p,&seq[2],6); |
| 1040 | |
| 1041 | EVP_DigestSignUpdate(mac_ctx,dtlsseq,8); |
| 1042 | } |
| 1043 | else |
| 1044 | EVP_DigestSignUpdate(mac_ctx,seq,8); |
| 1045 | |
| 1046 | EVP_DigestSignUpdate(mac_ctx,buf,5); |
| 1047 | EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length); |
| 1048 | t=EVP_DigestSignFinal(mac_ctx,md,&md_size); |
| 1049 | OPENSSL_assert(t > 0); |
| 1050 | |
| 1051 | if (!stream_mac) EVP_MD_CTX_cleanup(&hmac); |
| 1052 | #ifdef TLS_DEBUG |
| 1053 | printf("sec="); |
| 1054 | {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } |
| 1055 | printf("seq="); |
| 1056 | {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } |
| 1057 | printf("buf="); |
| 1058 | {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } |
| 1059 | printf("rec="); |
| 1060 | {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } |
| 1061 | #endif |
| 1062 | |
| 1063 | if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) |
| 1064 | { |
| 1065 | for (i=7; i>=0; i--) |
| 1066 | { |
| 1067 | ++seq[i]; |
| 1068 | if (seq[i] != 0) break; |
| 1069 | } |
| 1070 | } |
| 1071 | |
| 1072 | #ifdef TLS_DEBUG |
| 1073 | {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } |
| 1074 | #endif |
| 1075 | return(md_size); |
| 1076 | } |
| 1077 | |
| 1078 | int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, |
| 1079 | int len) |
| 1080 | { |
| 1081 | unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; |
| 1082 | const void *co = NULL, *so = NULL; |
| 1083 | int col = 0, sol = 0; |
| 1084 | |
| 1085 | |
| 1086 | #ifdef KSSL_DEBUG |
| 1087 | printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len); |
| 1088 | #endif /* KSSL_DEBUG */ |
| 1089 | |
| 1090 | #ifdef TLSEXT_TYPE_opaque_prf_input |
| 1091 | if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL && |
| 1092 | s->s3->client_opaque_prf_input_len > 0 && |
| 1093 | s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len) |
| 1094 | { |
| 1095 | co = s->s3->client_opaque_prf_input; |
| 1096 | col = s->s3->server_opaque_prf_input_len; |
| 1097 | so = s->s3->server_opaque_prf_input; |
| 1098 | sol = s->s3->client_opaque_prf_input_len; /* must be same as col (see draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1) */ |
| 1099 | } |
| 1100 | #endif |
| 1101 | |
| 1102 | tls1_PRF(ssl_get_algorithm2(s), |
| 1103 | TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE, |
| 1104 | s->s3->client_random,SSL3_RANDOM_SIZE, |
| 1105 | co, col, |
| 1106 | s->s3->server_random,SSL3_RANDOM_SIZE, |
| 1107 | so, sol, |
| 1108 | p,len, |
| 1109 | s->session->master_key,buff,sizeof buff); |
| 1110 | #ifdef SSL_DEBUG |
| 1111 | fprintf(stderr, "Premaster Secret:\n"); |
| 1112 | BIO_dump_fp(stderr, (char *)p, len); |
| 1113 | fprintf(stderr, "Client Random:\n"); |
| 1114 | BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE); |
| 1115 | fprintf(stderr, "Server Random:\n"); |
| 1116 | BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE); |
| 1117 | fprintf(stderr, "Master Secret:\n"); |
| 1118 | BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE); |
| 1119 | #endif |
| 1120 | |
| 1121 | #ifdef KSSL_DEBUG |
| 1122 | printf ("tls1_generate_master_secret() complete\n"); |
| 1123 | #endif /* KSSL_DEBUG */ |
| 1124 | return(SSL3_MASTER_SECRET_SIZE); |
| 1125 | } |
| 1126 | |
| 1127 | int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen, |
| 1128 | const char *label, size_t llen, const unsigned char *context, |
| 1129 | size_t contextlen, int use_context) |
| 1130 | { |
| 1131 | unsigned char *buff; |
| 1132 | unsigned char *val = NULL; |
| 1133 | size_t vallen, currentvalpos; |
| 1134 | int rv; |
| 1135 | |
| 1136 | #ifdef KSSL_DEBUG |
| 1137 | printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, p, plen); |
| 1138 | #endif /* KSSL_DEBUG */ |
| 1139 | |
| 1140 | buff = OPENSSL_malloc(olen); |
| 1141 | if (buff == NULL) goto err2; |
| 1142 | |
| 1143 | /* construct PRF arguments |
| 1144 | * we construct the PRF argument ourself rather than passing separate |
| 1145 | * values into the TLS PRF to ensure that the concatenation of values |
| 1146 | * does not create a prohibited label. |
| 1147 | */ |
| 1148 | vallen = llen + SSL3_RANDOM_SIZE * 2; |
| 1149 | if (use_context) |
| 1150 | { |
| 1151 | vallen += 2 + contextlen; |
| 1152 | } |
| 1153 | |
| 1154 | val = OPENSSL_malloc(vallen); |
| 1155 | if (val == NULL) goto err2; |
| 1156 | currentvalpos = 0; |
| 1157 | memcpy(val + currentvalpos, (unsigned char *) label, llen); |
| 1158 | currentvalpos += llen; |
| 1159 | memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE); |
| 1160 | currentvalpos += SSL3_RANDOM_SIZE; |
| 1161 | memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE); |
| 1162 | currentvalpos += SSL3_RANDOM_SIZE; |
| 1163 | |
| 1164 | if (use_context) |
| 1165 | { |
| 1166 | val[currentvalpos] = (contextlen >> 8) & 0xff; |
| 1167 | currentvalpos++; |
| 1168 | val[currentvalpos] = contextlen & 0xff; |
| 1169 | currentvalpos++; |
| 1170 | if ((contextlen > 0) || (context != NULL)) |
| 1171 | { |
| 1172 | memcpy(val + currentvalpos, context, contextlen); |
| 1173 | } |
| 1174 | } |
| 1175 | |
| 1176 | /* disallow prohibited labels |
| 1177 | * note that SSL3_RANDOM_SIZE > max(prohibited label len) = |
| 1178 | * 15, so size of val > max(prohibited label len) = 15 and the |
| 1179 | * comparisons won't have buffer overflow |
| 1180 | */ |
| 1181 | if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST, |
| 1182 | TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1; |
| 1183 | if (memcmp(val, TLS_MD_SERVER_FINISH_CONST, |
| 1184 | TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1; |
| 1185 | if (memcmp(val, TLS_MD_MASTER_SECRET_CONST, |
| 1186 | TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1; |
| 1187 | if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST, |
| 1188 | TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1; |
| 1189 | |
| 1190 | rv = tls1_PRF(s->s3->tmp.new_cipher->algorithm2, |
| 1191 | val, vallen, |
| 1192 | NULL, 0, |
| 1193 | NULL, 0, |
| 1194 | NULL, 0, |
| 1195 | NULL, 0, |
| 1196 | s->session->master_key,s->session->master_key_length, |
| 1197 | out,buff,olen); |
| 1198 | |
| 1199 | #ifdef KSSL_DEBUG |
| 1200 | printf ("tls1_export_keying_material() complete\n"); |
| 1201 | #endif /* KSSL_DEBUG */ |
| 1202 | goto ret; |
| 1203 | err1: |
| 1204 | SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL); |
| 1205 | rv = 0; |
| 1206 | goto ret; |
| 1207 | err2: |
| 1208 | SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE); |
| 1209 | rv = 0; |
| 1210 | ret: |
| 1211 | if (buff != NULL) OPENSSL_free(buff); |
| 1212 | if (val != NULL) OPENSSL_free(val); |
| 1213 | return(rv); |
| 1214 | } |
| 1215 | |
| 1216 | int tls1_alert_code(int code) |
| 1217 | { |
| 1218 | switch (code) |
| 1219 | { |
| 1220 | case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); |
| 1221 | case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); |
| 1222 | case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); |
| 1223 | case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); |
| 1224 | case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); |
| 1225 | case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); |
| 1226 | case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); |
| 1227 | case SSL_AD_NO_CERTIFICATE: return(-1); |
| 1228 | case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); |
| 1229 | case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); |
| 1230 | case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); |
| 1231 | case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); |
| 1232 | case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); |
| 1233 | case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); |
| 1234 | case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); |
| 1235 | case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); |
| 1236 | case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); |
| 1237 | case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); |
| 1238 | case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); |
| 1239 | case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); |
| 1240 | case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); |
| 1241 | case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); |
| 1242 | case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); |
| 1243 | case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); |
| 1244 | case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION); |
| 1245 | case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE); |
| 1246 | case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME); |
| 1247 | case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE); |
| 1248 | case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE); |
| 1249 | case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY); |
| 1250 | #if 0 /* not appropriate for TLS, not used for DTLS */ |
| 1251 | case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return |
| 1252 | (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); |
| 1253 | #endif |
| 1254 | default: return(-1); |
| 1255 | } |
| 1256 | } |