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 */ 152static 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, ctx_init; 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_init(&ctx_init); 175 EVP_MD_CTX_set_flags(&ctx_init, 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_init, NULL, md, NULL, mac_key)) 180 goto err; 181 if (!EVP_MD_CTX_copy_ex(&ctx, &ctx_init)) 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 /* Reinit mac contexts */ 198 if (!EVP_MD_CTX_copy_ex(&ctx, &ctx_init)) 199 goto err; 200 if (!EVP_DigestSignUpdate(&ctx, A1, A1_len)) 201 goto err; 202 if (olen > chunk && !EVP_MD_CTX_copy_ex(&ctx_tmp, &ctx)) 203 goto err; 204 if (seed1 && !EVP_DigestSignUpdate(&ctx, seed1, seed1_len)) 205 goto err; 206 if (seed2 && !EVP_DigestSignUpdate(&ctx, seed2, seed2_len)) 207 goto err; 208 if (seed3 && !EVP_DigestSignUpdate(&ctx, seed3, seed3_len)) 209 goto err; 210 if (seed4 && !EVP_DigestSignUpdate(&ctx, seed4, seed4_len)) 211 goto err; 212 if (seed5 && !EVP_DigestSignUpdate(&ctx, seed5, seed5_len)) 213 goto err; 214 215 if (olen > chunk) { 216 if (!EVP_DigestSignFinal(&ctx, out, &j)) 217 goto err; 218 out += j; 219 olen -= j; 220 /* calc the next A1 value */ 221 if (!EVP_DigestSignFinal(&ctx_tmp, A1, &A1_len)) 222 goto err; 223 } else { /* last one */ 224 225 if (!EVP_DigestSignFinal(&ctx, A1, &A1_len)) 226 goto err; 227 memcpy(out, A1, olen); 228 break; 229 } 230 } 231 ret = 1; 232 err: 233 EVP_PKEY_free(mac_key); 234 EVP_MD_CTX_cleanup(&ctx); 235 EVP_MD_CTX_cleanup(&ctx_tmp); 236 EVP_MD_CTX_cleanup(&ctx_init); 237 OPENSSL_cleanse(A1, sizeof(A1)); 238 return ret; 239} 240 241/* seed1 through seed5 are virtually concatenated */ 242static int tls1_PRF(long digest_mask, 243 const void *seed1, int seed1_len, 244 const void *seed2, int seed2_len, 245 const void *seed3, int seed3_len, 246 const void *seed4, int seed4_len, 247 const void *seed5, int seed5_len, 248 const unsigned char *sec, int slen, 249 unsigned char *out1, unsigned char *out2, int olen) 250{ 251 int len, i, idx, count; 252 const unsigned char *S1; 253 long m; 254 const EVP_MD *md; 255 int ret = 0; 256 257 /* Count number of digests and partition sec evenly */ 258 count = 0; 259 for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) { 260 if ((m << TLS1_PRF_DGST_SHIFT) & digest_mask) 261 count++; 262 } 263 if (!count) { 264 /* Should never happen */ 265 SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR); 266 goto err; 267 } 268 len = slen / count; 269 if (count == 1) 270 slen = 0; 271 S1 = sec; 272 memset(out1, 0, olen); 273 for (idx = 0; ssl_get_handshake_digest(idx, &m, &md); idx++) { 274 if ((m << TLS1_PRF_DGST_SHIFT) & digest_mask) { 275 if (!md) { 276 SSLerr(SSL_F_TLS1_PRF, 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, 281 seed3_len, seed4, seed4_len, seed5, seed5_len, 282 out2, olen)) 283 goto err; 284 S1 += len; 285 for (i = 0; i < olen; i++) { 286 out1[i] ^= out2[i]; 287 } 288 } 289 } 290 ret = 1; 291 err: 292 return ret; 293} 294 295static int tls1_generate_key_block(SSL *s, unsigned char *km, 296 unsigned char *tmp, int num) 297{ 298 int ret; 299 ret = tls1_PRF(ssl_get_algorithm2(s), 300 TLS_MD_KEY_EXPANSION_CONST, 301 TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3->server_random, 302 SSL3_RANDOM_SIZE, s->s3->client_random, SSL3_RANDOM_SIZE, 303 NULL, 0, NULL, 0, s->session->master_key, 304 s->session->master_key_length, km, tmp, num); 305#ifdef KSSL_DEBUG 306 fprintf(stderr, "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 fprintf(stderr, "%02X", s->session->master_key[i]); 312 } 313 fprintf(stderr, "\n"); 314 } 315#endif /* KSSL_DEBUG */ 316 return ret; 317} 318 319int 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 fprintf(stderr, "tls1_change_cipher_state(which= %d) w/\n", which); 353 fprintf(stderr, "\talg= %ld/%ld, comp= %p\n", 354 s->s3->tmp.new_cipher->algorithm_mkey, 355 s->s3->tmp.new_cipher->algorithm_auth, comp); 356 fprintf(stderr, "\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c); 357 fprintf(stderr, "\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n", 358 c->nid, c->block_size, c->key_len, c->iv_len); 359 fprintf(stderr, "\tkey_block: len= %d, data= ", 360 s->s3->tmp.key_block_length); 361 { 362 int i; 363 for (i = 0; i < s->s3->tmp.key_block_length; i++) 364 fprintf(stderr, "%02x", s->s3->tmp.key_block[i]); 365 fprintf(stderr, "\n"); 366 } 367#endif /* KSSL_DEBUG */ 368 369 if (which & SSL3_CC_READ) { 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 = 378 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) 379 goto err; 380 else 381 /* 382 * make sure it's intialized in case we exit later with an error 383 */ 384 EVP_CIPHER_CTX_init(s->enc_read_ctx); 385 dd = s->enc_read_ctx; 386 mac_ctx = ssl_replace_hash(&s->read_hash, NULL); 387#ifndef OPENSSL_NO_COMP 388 if (s->expand != NULL) { 389 COMP_CTX_free(s->expand); 390 s->expand = NULL; 391 } 392 if (comp != NULL) { 393 s->expand = COMP_CTX_new(comp->method); 394 if (s->expand == NULL) { 395 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, 396 SSL_R_COMPRESSION_LIBRARY_ERROR); 397 goto err2; 398 } 399 if (s->s3->rrec.comp == NULL) 400 s->s3->rrec.comp = (unsigned char *) 401 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); 402 if (s->s3->rrec.comp == NULL) 403 goto err; 404 } 405#endif 406 /* 407 * this is done by dtls1_reset_seq_numbers for DTLS 408 */ 409 if (!SSL_IS_DTLS(s)) 410 memset(&(s->s3->read_sequence[0]), 0, 8); 411 mac_secret = &(s->s3->read_mac_secret[0]); 412 mac_secret_size = &(s->s3->read_mac_secret_size); 413 } else { 414 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) 415 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM; 416 else 417 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM; 418 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) 419 reuse_dd = 1; 420 else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) 421 goto err; 422 dd = s->enc_write_ctx; 423 if (SSL_IS_DTLS(s)) { 424 mac_ctx = EVP_MD_CTX_create(); 425 if (!mac_ctx) 426 goto err; 427 s->write_hash = mac_ctx; 428 } else 429 mac_ctx = ssl_replace_hash(&s->write_hash, NULL); 430#ifndef OPENSSL_NO_COMP 431 if (s->compress != NULL) { 432 COMP_CTX_free(s->compress); 433 s->compress = NULL; 434 } 435 if (comp != NULL) { 436 s->compress = COMP_CTX_new(comp->method); 437 if (s->compress == NULL) { 438 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, 439 SSL_R_COMPRESSION_LIBRARY_ERROR); 440 goto err2; 441 } 442 } 443#endif 444 /* 445 * this is done by dtls1_reset_seq_numbers for DTLS 446 */ 447 if (!SSL_IS_DTLS(s)) 448 memset(&(s->s3->write_sequence[0]), 0, 8); 449 mac_secret = &(s->s3->write_mac_secret[0]); 450 mac_secret_size = &(s->s3->write_mac_secret_size); 451 } 452 453 if (reuse_dd) 454 EVP_CIPHER_CTX_cleanup(dd); 455 456 p = s->s3->tmp.key_block; 457 i = *mac_secret_size = s->s3->tmp.new_mac_secret_size; 458 459 cl = EVP_CIPHER_key_length(c); 460 j = is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? 461 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; 462 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ 463 /* If GCM mode only part of IV comes from PRF */ 464 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) 465 k = EVP_GCM_TLS_FIXED_IV_LEN; 466 else 467 k = EVP_CIPHER_iv_length(c); 468 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || 469 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) { 470 ms = &(p[0]); 471 n = i + i; 472 key = &(p[n]); 473 n += j + j; 474 iv = &(p[n]); 475 n += k + k; 476 exp_label = (unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; 477 exp_label_len = TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; 478 client_write = 1; 479 } else { 480 n = i; 481 ms = &(p[n]); 482 n += i + j; 483 key = &(p[n]); 484 n += j + k; 485 iv = &(p[n]); 486 n += k; 487 exp_label = (unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; 488 exp_label_len = TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; 489 client_write = 0; 490 } 491 492 if (n > s->s3->tmp.key_block_length) { 493 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); 494 goto err2; 495 } 496 497 memcpy(mac_secret, ms, i); 498 499 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) { 500 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, 501 mac_secret, *mac_secret_size); 502 EVP_DigestSignInit(mac_ctx, NULL, m, NULL, mac_key); 503 EVP_PKEY_free(mac_key); 504 } 505#ifdef TLS_DEBUG 506 printf("which = %04X\nmac key=", which); 507 { 508 int z; 509 for (z = 0; z < i; z++) 510 printf("%02X%c", ms[z], ((z + 1) % 16) ? ' ' : '\n'); 511 } 512#endif 513 if (is_export) { 514 /* 515 * In here I set both the read and write key/iv to the same value 516 * since only the correct one will be used :-). 517 */ 518 if (!tls1_PRF(ssl_get_algorithm2(s), 519 exp_label, exp_label_len, 520 s->s3->client_random, SSL3_RANDOM_SIZE, 521 s->s3->server_random, SSL3_RANDOM_SIZE, 522 NULL, 0, NULL, 0, 523 key, j, tmp1, tmp2, EVP_CIPHER_key_length(c))) 524 goto err2; 525 key = tmp1; 526 527 if (k > 0) { 528 if (!tls1_PRF(ssl_get_algorithm2(s), 529 TLS_MD_IV_BLOCK_CONST, TLS_MD_IV_BLOCK_CONST_SIZE, 530 s->s3->client_random, SSL3_RANDOM_SIZE, 531 s->s3->server_random, SSL3_RANDOM_SIZE, 532 NULL, 0, NULL, 0, empty, 0, iv1, iv2, k * 2)) 533 goto err2; 534 if (client_write) 535 iv = iv1; 536 else 537 iv = &(iv1[k]); 538 } 539 } 540 541 s->session->key_arg_length = 0; 542#ifdef KSSL_DEBUG 543 { 544 int i; 545 fprintf(stderr, "EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); 546 fprintf(stderr, "\tkey= "); 547 for (i = 0; i < c->key_len; i++) 548 fprintf(stderr, "%02x", key[i]); 549 fprintf(stderr, "\n"); 550 fprintf(stderr, "\t iv= "); 551 for (i = 0; i < c->iv_len; i++) 552 fprintf(stderr, "%02x", iv[i]); 553 fprintf(stderr, "\n"); 554 } 555#endif /* KSSL_DEBUG */ 556 557 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) { 558 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE)) 559 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv)) { 560 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); 561 goto err2; 562 } 563 } else { 564 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) { 565 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); 566 goto err2; 567 } 568 } 569 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */ 570 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size 571 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY, 572 *mac_secret_size, mac_secret)) { 573 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR); 574 goto err2; 575 } 576#ifdef OPENSSL_SSL_TRACE_CRYPTO 577 if (s->msg_callback) { 578 int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0; 579 if (*mac_secret_size) 580 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC, 581 mac_secret, *mac_secret_size, 582 s, s->msg_callback_arg); 583 if (c->key_len) 584 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY, 585 key, c->key_len, s, s->msg_callback_arg); 586 if (k) { 587 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) 588 wh |= TLS1_RT_CRYPTO_FIXED_IV; 589 else 590 wh |= TLS1_RT_CRYPTO_IV; 591 s->msg_callback(2, s->version, wh, iv, k, s, s->msg_callback_arg); 592 } 593 } 594#endif 595 596#ifdef TLS_DEBUG 597 printf("which = %04X\nkey=", which); 598 { 599 int z; 600 for (z = 0; z < EVP_CIPHER_key_length(c); z++) 601 printf("%02X%c", key[z], ((z + 1) % 16) ? ' ' : '\n'); 602 } 603 printf("\niv="); 604 { 605 int z; 606 for (z = 0; z < k; z++) 607 printf("%02X%c", iv[z], ((z + 1) % 16) ? ' ' : '\n'); 608 } 609 printf("\n"); 610#endif 611 612 OPENSSL_cleanse(tmp1, sizeof(tmp1)); 613 OPENSSL_cleanse(tmp2, sizeof(tmp1)); 614 OPENSSL_cleanse(iv1, sizeof(iv1)); 615 OPENSSL_cleanse(iv2, sizeof(iv2)); 616 return (1); 617 err: 618 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE); 619 err2: 620 return (0); 621} 622 623int tls1_setup_key_block(SSL *s) 624{ 625 unsigned char *p1, *p2 = NULL; 626 const EVP_CIPHER *c; 627 const EVP_MD *hash; 628 int num; 629 SSL_COMP *comp; 630 int mac_type = NID_undef, mac_secret_size = 0; 631 int ret = 0; 632 633#ifdef KSSL_DEBUG 634 fprintf(stderr, "tls1_setup_key_block()\n"); 635#endif /* KSSL_DEBUG */ 636 637 if (s->s3->tmp.key_block_length != 0) 638 return (1); 639 640 if (!ssl_cipher_get_evp 641 (s->session, &c, &hash, &mac_type, &mac_secret_size, &comp)) { 642 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE); 643 return (0); 644 } 645 646 s->s3->tmp.new_sym_enc = c; 647 s->s3->tmp.new_hash = hash; 648 s->s3->tmp.new_mac_pkey_type = mac_type; 649 s->s3->tmp.new_mac_secret_size = mac_secret_size; 650 num = 651 EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c); 652 num *= 2; 653 654 ssl3_cleanup_key_block(s); 655 656 if ((p1 = (unsigned char *)OPENSSL_malloc(num)) == NULL) { 657 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE); 658 goto err; 659 } 660 661 s->s3->tmp.key_block_length = num; 662 s->s3->tmp.key_block = p1; 663 664 if ((p2 = (unsigned char *)OPENSSL_malloc(num)) == NULL) { 665 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE); 666 OPENSSL_free(p1); 667 goto err; 668 } 669#ifdef TLS_DEBUG 670 printf("client random\n"); 671 { 672 int z; 673 for (z = 0; z < SSL3_RANDOM_SIZE; z++) 674 printf("%02X%c", s->s3->client_random[z], 675 ((z + 1) % 16) ? ' ' : '\n'); 676 } 677 printf("server random\n"); 678 { 679 int z; 680 for (z = 0; z < SSL3_RANDOM_SIZE; z++) 681 printf("%02X%c", s->s3->server_random[z], 682 ((z + 1) % 16) ? ' ' : '\n'); 683 } 684 printf("pre-master\n"); 685 { 686 int z; 687 for (z = 0; z < s->session->master_key_length; z++) 688 printf("%02X%c", s->session->master_key[z], 689 ((z + 1) % 16) ? ' ' : '\n'); 690 } 691#endif 692 if (!tls1_generate_key_block(s, p1, p2, num)) 693 goto err; 694#ifdef TLS_DEBUG 695 printf("\nkey block\n"); 696 { 697 int z; 698 for (z = 0; z < num; z++) 699 printf("%02X%c", p1[z], ((z + 1) % 16) ? ' ' : '\n'); 700 } 701#endif 702 703 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) 704 && s->method->version <= TLS1_VERSION) { 705 /* 706 * enable vulnerability countermeasure for CBC ciphers with known-IV 707 * problem (http://www.openssl.org/~bodo/tls-cbc.txt) 708 */ 709 s->s3->need_empty_fragments = 1; 710 711 if (s->session->cipher != NULL) { 712 if (s->session->cipher->algorithm_enc == SSL_eNULL) 713 s->s3->need_empty_fragments = 0; 714 715#ifndef OPENSSL_NO_RC4 716 if (s->session->cipher->algorithm_enc == SSL_RC4) 717 s->s3->need_empty_fragments = 0; 718#endif 719 } 720 } 721 722 ret = 1; 723 err: 724 if (p2) { 725 OPENSSL_cleanse(p2, num); 726 OPENSSL_free(p2); 727 } 728 return (ret); 729} 730 731/*- 732 * tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively. 733 * 734 * Returns: 735 * 0: (in non-constant time) if the record is publically invalid (i.e. too 736 * short etc). 737 * 1: if the record's padding is valid / the encryption was successful. 738 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending, 739 * an internal error occured. 740 */ 741int tls1_enc(SSL *s, int send) 742{ 743 SSL3_RECORD *rec; 744 EVP_CIPHER_CTX *ds; 745 unsigned long l; 746 int bs, i, j, k, pad = 0, ret, mac_size = 0; 747 const EVP_CIPHER *enc; 748 749 if (send) { 750 if (EVP_MD_CTX_md(s->write_hash)) { 751 int n = EVP_MD_CTX_size(s->write_hash); 752 OPENSSL_assert(n >= 0); 753 } 754 ds = s->enc_write_ctx; 755 rec = &(s->s3->wrec); 756 if (s->enc_write_ctx == NULL) 757 enc = NULL; 758 else { 759 int ivlen; 760 enc = EVP_CIPHER_CTX_cipher(s->enc_write_ctx); 761 /* For TLSv1.1 and later explicit IV */ 762 if (SSL_USE_EXPLICIT_IV(s) 763 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE) 764 ivlen = EVP_CIPHER_iv_length(enc); 765 else 766 ivlen = 0; 767 if (ivlen > 1) { 768 if (rec->data != rec->input) 769 /* 770 * we can't write into the input stream: Can this ever 771 * happen?? (steve) 772 */ 773 fprintf(stderr, 774 "%s:%d: rec->data != rec->input\n", 775 __FILE__, __LINE__); 776 else if (RAND_bytes(rec->input, ivlen) <= 0) 777 return -1; 778 } 779 } 780 } else { 781 if (EVP_MD_CTX_md(s->read_hash)) { 782 int n = EVP_MD_CTX_size(s->read_hash); 783 OPENSSL_assert(n >= 0); 784 } 785 ds = s->enc_read_ctx; 786 rec = &(s->s3->rrec); 787 if (s->enc_read_ctx == NULL) 788 enc = NULL; 789 else 790 enc = EVP_CIPHER_CTX_cipher(s->enc_read_ctx); 791 } 792 793#ifdef KSSL_DEBUG 794 fprintf(stderr, "tls1_enc(%d)\n", send); 795#endif /* KSSL_DEBUG */ 796 797 if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) { 798 memmove(rec->data, rec->input, rec->length); 799 rec->input = rec->data; 800 ret = 1; 801 } else { 802 l = rec->length; 803 bs = EVP_CIPHER_block_size(ds->cipher); 804 805 if (EVP_CIPHER_flags(ds->cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) { 806 unsigned char buf[EVP_AEAD_TLS1_AAD_LEN], *seq; 807 808 seq = send ? s->s3->write_sequence : s->s3->read_sequence; 809 810 if (SSL_IS_DTLS(s)) { 811 unsigned char dtlsseq[9], *p = dtlsseq; 812 813 s2n(send ? s->d1->w_epoch : s->d1->r_epoch, p); 814 memcpy(p, &seq[2], 6); 815 memcpy(buf, dtlsseq, 8); 816 } else { 817 memcpy(buf, seq, 8); 818 for (i = 7; i >= 0; i--) { /* increment */ 819 ++seq[i]; 820 if (seq[i] != 0) 821 break; 822 } 823 } 824 825 buf[8] = rec->type; 826 buf[9] = (unsigned char)(s->version >> 8); 827 buf[10] = (unsigned char)(s->version); 828 buf[11] = rec->length >> 8; 829 buf[12] = rec->length & 0xff; 830 pad = EVP_CIPHER_CTX_ctrl(ds, EVP_CTRL_AEAD_TLS1_AAD, 831 EVP_AEAD_TLS1_AAD_LEN, buf); 832 if (pad <= 0) 833 return -1; 834 if (send) { 835 l += pad; 836 rec->length += pad; 837 } 838 } else if ((bs != 1) && send) { 839 i = bs - ((int)l % bs); 840 841 /* Add weird padding of upto 256 bytes */ 842 843 /* we need to add 'i' padding bytes of value j */ 844 j = i - 1; 845 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) { 846 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 847 j++; 848 } 849 for (k = (int)l; k < (int)(l + i); k++) 850 rec->input[k] = j; 851 l += i; 852 rec->length += i; 853 } 854#ifdef KSSL_DEBUG 855 { 856 unsigned long ui; 857 fprintf(stderr, 858 "EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", 859 ds, rec->data, rec->input, l); 860 fprintf(stderr, 861 "\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%lu %lu], %d iv_len\n", 862 ds->buf_len, ds->cipher->key_len, DES_KEY_SZ, 863 DES_SCHEDULE_SZ, ds->cipher->iv_len); 864 fprintf(stderr, "\t\tIV: "); 865 for (i = 0; i < ds->cipher->iv_len; i++) 866 fprintf(stderr, "%02X", ds->iv[i]); 867 fprintf(stderr, "\n"); 868 fprintf(stderr, "\trec->input="); 869 for (ui = 0; ui < l; ui++) 870 fprintf(stderr, " %02x", rec->input[ui]); 871 fprintf(stderr, "\n"); 872 } 873#endif /* KSSL_DEBUG */ 874 875 if (!send) { 876 if (l == 0 || l % bs != 0) 877 return 0; 878 } 879 880 i = EVP_Cipher(ds, rec->data, rec->input, l); 881 if ((EVP_CIPHER_flags(ds->cipher) & EVP_CIPH_FLAG_CUSTOM_CIPHER) 882 ? (i < 0) 883 : (i == 0)) 884 return -1; /* AEAD can fail to verify MAC */ 885 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) { 886 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN; 887 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN; 888 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN; 889 } 890#ifdef KSSL_DEBUG 891 { 892 unsigned long i; 893 fprintf(stderr, "\trec->data="); 894 for (i = 0; i < l; i++) 895 fprintf(stderr, " %02x", rec->data[i]); 896 fprintf(stderr, "\n"); 897 } 898#endif /* KSSL_DEBUG */ 899 900 ret = 1; 901 if (EVP_MD_CTX_md(s->read_hash) != NULL) 902 mac_size = EVP_MD_CTX_size(s->read_hash); 903 if ((bs != 1) && !send) 904 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size); 905 if (pad && !send) 906 rec->length -= pad; 907 } 908 return ret; 909} 910 911int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out) 912{ 913 unsigned int ret; 914 EVP_MD_CTX ctx, *d = NULL; 915 int i; 916 917 if (s->s3->handshake_buffer) 918 if (!ssl3_digest_cached_records(s)) 919 return 0; 920 921 for (i = 0; i < SSL_MAX_DIGEST; i++) { 922 if (s->s3->handshake_dgst[i] 923 && EVP_MD_CTX_type(s->s3->handshake_dgst[i]) == md_nid) { 924 d = s->s3->handshake_dgst[i]; 925 break; 926 } 927 } 928 if (!d) { 929 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC, SSL_R_NO_REQUIRED_DIGEST); 930 return 0; 931 } 932 933 EVP_MD_CTX_init(&ctx); 934 EVP_MD_CTX_copy_ex(&ctx, d); 935 EVP_DigestFinal_ex(&ctx, out, &ret); 936 EVP_MD_CTX_cleanup(&ctx); 937 return ((int)ret); 938} 939 940int tls1_final_finish_mac(SSL *s, 941 const char *str, int slen, unsigned char *out) 942{ 943 unsigned int i; 944 EVP_MD_CTX ctx; 945 unsigned char buf[2 * EVP_MAX_MD_SIZE]; 946 unsigned char *q, buf2[12]; 947 int idx; 948 long mask; 949 int err = 0; 950 const EVP_MD *md; 951 952 q = buf; 953 954 if (s->s3->handshake_buffer) 955 if (!ssl3_digest_cached_records(s)) 956 return 0; 957 958 EVP_MD_CTX_init(&ctx); 959 960 for (idx = 0; ssl_get_handshake_digest(idx, &mask, &md); idx++) { 961 if (mask & ssl_get_algorithm2(s)) { 962 int hashsize = EVP_MD_size(md); 963 EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx]; 964 if (!hdgst || hashsize < 0 965 || hashsize > (int)(sizeof buf - (size_t)(q - buf))) { 966 /* 967 * internal error: 'buf' is too small for this cipersuite! 968 */ 969 err = 1; 970 } else { 971 if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) || 972 !EVP_DigestFinal_ex(&ctx, q, &i) || 973 (i != (unsigned int)hashsize)) 974 err = 1; 975 q += hashsize; 976 } 977 } 978 } 979 980 if (!tls1_PRF(ssl_get_algorithm2(s), 981 str, slen, buf, (int)(q - buf), NULL, 0, NULL, 0, NULL, 0, 982 s->session->master_key, s->session->master_key_length, 983 out, buf2, sizeof buf2)) 984 err = 1; 985 EVP_MD_CTX_cleanup(&ctx); 986 987 OPENSSL_cleanse(buf, (int)(q - buf)); 988 OPENSSL_cleanse(buf2, sizeof(buf2)); 989 if (err) 990 return 0; 991 else 992 return sizeof buf2; 993} 994 995int tls1_mac(SSL *ssl, unsigned char *md, int send) 996{ 997 SSL3_RECORD *rec; 998 unsigned char *seq; 999 EVP_MD_CTX *hash; 1000 size_t md_size, orig_len; 1001 int i; 1002 EVP_MD_CTX hmac, *mac_ctx; 1003 unsigned char header[13]; 1004 int stream_mac = (send ? (ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM) 1005 : (ssl->mac_flags & SSL_MAC_FLAG_READ_MAC_STREAM)); 1006 int t; 1007 1008 if (send) { 1009 rec = &(ssl->s3->wrec); 1010 seq = &(ssl->s3->write_sequence[0]); 1011 hash = ssl->write_hash; 1012 } else { 1013 rec = &(ssl->s3->rrec); 1014 seq = &(ssl->s3->read_sequence[0]); 1015 hash = ssl->read_hash; 1016 } 1017 1018 t = EVP_MD_CTX_size(hash); 1019 OPENSSL_assert(t >= 0); 1020 md_size = t; 1021 1022 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ 1023 if (stream_mac) { 1024 mac_ctx = hash; 1025 } else { 1026 if (!EVP_MD_CTX_copy(&hmac, hash)) 1027 return -1; 1028 mac_ctx = &hmac; 1029 } 1030 1031 if (SSL_IS_DTLS(ssl)) { 1032 unsigned char dtlsseq[8], *p = dtlsseq; 1033 1034 s2n(send ? ssl->d1->w_epoch : ssl->d1->r_epoch, p); 1035 memcpy(p, &seq[2], 6); 1036 1037 memcpy(header, dtlsseq, 8); 1038 } else 1039 memcpy(header, seq, 8); 1040 1041 /* 1042 * kludge: tls1_cbc_remove_padding passes padding length in rec->type 1043 */ 1044 orig_len = rec->length + md_size + ((unsigned int)rec->type >> 8); 1045 rec->type &= 0xff; 1046 1047 header[8] = rec->type; 1048 header[9] = (unsigned char)(ssl->version >> 8); 1049 header[10] = (unsigned char)(ssl->version); 1050 header[11] = (rec->length) >> 8; 1051 header[12] = (rec->length) & 0xff; 1052 1053 if (!send && 1054 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE && 1055 ssl3_cbc_record_digest_supported(mac_ctx)) { 1056 /* 1057 * This is a CBC-encrypted record. We must avoid leaking any 1058 * timing-side channel information about how many blocks of data we 1059 * are hashing because that gives an attacker a timing-oracle. 1060 */ 1061 /* Final param == not SSLv3 */ 1062 ssl3_cbc_digest_record(mac_ctx, 1063 md, &md_size, 1064 header, rec->input, 1065 rec->length + md_size, orig_len, 1066 ssl->s3->read_mac_secret, 1067 ssl->s3->read_mac_secret_size, 0); 1068 } else { 1069 EVP_DigestSignUpdate(mac_ctx, header, sizeof(header)); 1070 EVP_DigestSignUpdate(mac_ctx, rec->input, rec->length); 1071 t = EVP_DigestSignFinal(mac_ctx, md, &md_size); 1072 OPENSSL_assert(t > 0); 1073#ifdef OPENSSL_FIPS 1074 if (!send && FIPS_mode()) 1075 tls_fips_digest_extra(ssl->enc_read_ctx, 1076 mac_ctx, rec->input, rec->length, orig_len); 1077#endif 1078 } 1079 1080 if (!stream_mac) 1081 EVP_MD_CTX_cleanup(&hmac); 1082#ifdef TLS_DEBUG 1083 fprintf(stderr, "seq="); 1084 { 1085 int z; 1086 for (z = 0; z < 8; z++) 1087 fprintf(stderr, "%02X ", seq[z]); 1088 fprintf(stderr, "\n"); 1089 } 1090 fprintf(stderr, "rec="); 1091 { 1092 unsigned int z; 1093 for (z = 0; z < rec->length; z++) 1094 fprintf(stderr, "%02X ", rec->data[z]); 1095 fprintf(stderr, "\n"); 1096 } 1097#endif 1098 1099 if (!SSL_IS_DTLS(ssl)) { 1100 for (i = 7; i >= 0; i--) { 1101 ++seq[i]; 1102 if (seq[i] != 0) 1103 break; 1104 } 1105 } 1106#ifdef TLS_DEBUG 1107 { 1108 unsigned int z; 1109 for (z = 0; z < md_size; z++) 1110 fprintf(stderr, "%02X ", md[z]); 1111 fprintf(stderr, "\n"); 1112 } 1113#endif 1114 return (md_size); 1115} 1116 1117int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, 1118 int len) 1119{ 1120 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; 1121 const void *co = NULL, *so = NULL; 1122 int col = 0, sol = 0; 1123 1124#ifdef KSSL_DEBUG 1125 fprintf(stderr, "tls1_generate_master_secret(%p,%p, %p, %d)\n", s, out, p, 1126 len); 1127#endif /* KSSL_DEBUG */ 1128 1129#ifdef TLSEXT_TYPE_opaque_prf_input 1130 if (s->s3->client_opaque_prf_input != NULL 1131 && s->s3->server_opaque_prf_input != NULL 1132 && s->s3->client_opaque_prf_input_len > 0 1133 && s->s3->client_opaque_prf_input_len == 1134 s->s3->server_opaque_prf_input_len) { 1135 co = s->s3->client_opaque_prf_input; 1136 col = s->s3->server_opaque_prf_input_len; 1137 so = s->s3->server_opaque_prf_input; 1138 /* 1139 * must be same as col (see 1140 * draft-resc-00.txts-opaque-prf-input-00.txt, section 3.1) 1141 */ 1142 sol = s->s3->client_opaque_prf_input_len; 1143 } 1144#endif 1145 1146 tls1_PRF(ssl_get_algorithm2(s), 1147 TLS_MD_MASTER_SECRET_CONST, TLS_MD_MASTER_SECRET_CONST_SIZE, 1148 s->s3->client_random, SSL3_RANDOM_SIZE, 1149 co, col, 1150 s->s3->server_random, SSL3_RANDOM_SIZE, 1151 so, sol, p, len, s->session->master_key, buff, sizeof buff); 1152 OPENSSL_cleanse(buff, sizeof buff); 1153#ifdef SSL_DEBUG 1154 fprintf(stderr, "Premaster Secret:\n"); 1155 BIO_dump_fp(stderr, (char *)p, len); 1156 fprintf(stderr, "Client Random:\n"); 1157 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE); 1158 fprintf(stderr, "Server Random:\n"); 1159 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE); 1160 fprintf(stderr, "Master Secret:\n"); 1161 BIO_dump_fp(stderr, (char *)s->session->master_key, 1162 SSL3_MASTER_SECRET_SIZE); 1163#endif 1164 1165#ifdef OPENSSL_SSL_TRACE_CRYPTO 1166 if (s->msg_callback) { 1167 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER, 1168 p, len, s, s->msg_callback_arg); 1169 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM, 1170 s->s3->client_random, SSL3_RANDOM_SIZE, 1171 s, s->msg_callback_arg); 1172 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM, 1173 s->s3->server_random, SSL3_RANDOM_SIZE, 1174 s, s->msg_callback_arg); 1175 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER, 1176 s->session->master_key, 1177 SSL3_MASTER_SECRET_SIZE, s, s->msg_callback_arg); 1178 } 1179#endif 1180 1181#ifdef KSSL_DEBUG 1182 fprintf(stderr, "tls1_generate_master_secret() complete\n"); 1183#endif /* KSSL_DEBUG */ 1184 return (SSL3_MASTER_SECRET_SIZE); 1185} 1186 1187int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1188 const char *label, size_t llen, 1189 const unsigned char *context, 1190 size_t contextlen, int use_context) 1191{ 1192 unsigned char *buff; 1193 unsigned char *val = NULL; 1194 size_t vallen, currentvalpos; 1195 int rv; 1196 1197#ifdef KSSL_DEBUG 1198 fprintf(stderr, "tls1_export_keying_material(%p,%p,%lu,%s,%lu,%p,%lu)\n", 1199 s, out, olen, label, llen, context, contextlen); 1200#endif /* KSSL_DEBUG */ 1201 1202 buff = OPENSSL_malloc(olen); 1203 if (buff == NULL) 1204 goto err2; 1205 1206 /* 1207 * construct PRF arguments we construct the PRF argument ourself rather 1208 * than passing separate values into the TLS PRF to ensure that the 1209 * concatenation of values does not create a prohibited label. 1210 */ 1211 vallen = llen + SSL3_RANDOM_SIZE * 2; 1212 if (use_context) { 1213 vallen += 2 + contextlen; 1214 } 1215 1216 val = OPENSSL_malloc(vallen); 1217 if (val == NULL) 1218 goto err2; 1219 currentvalpos = 0; 1220 memcpy(val + currentvalpos, (unsigned char *)label, llen); 1221 currentvalpos += llen; 1222 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE); 1223 currentvalpos += SSL3_RANDOM_SIZE; 1224 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE); 1225 currentvalpos += SSL3_RANDOM_SIZE; 1226 1227 if (use_context) { 1228 val[currentvalpos] = (contextlen >> 8) & 0xff; 1229 currentvalpos++; 1230 val[currentvalpos] = contextlen & 0xff; 1231 currentvalpos++; 1232 if ((contextlen > 0) || (context != NULL)) { 1233 memcpy(val + currentvalpos, context, contextlen); 1234 } 1235 } 1236 1237 /* 1238 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited 1239 * label len) = 15, so size of val > max(prohibited label len) = 15 and 1240 * the comparisons won't have buffer overflow 1241 */ 1242 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST, 1243 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) 1244 goto err1; 1245 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST, 1246 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) 1247 goto err1; 1248 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST, 1249 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) 1250 goto err1; 1251 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST, 1252 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) 1253 goto err1; 1254 1255 rv = tls1_PRF(ssl_get_algorithm2(s), 1256 val, vallen, 1257 NULL, 0, 1258 NULL, 0, 1259 NULL, 0, 1260 NULL, 0, 1261 s->session->master_key, s->session->master_key_length, 1262 out, buff, olen); 1263 OPENSSL_cleanse(val, vallen); 1264 OPENSSL_cleanse(buff, olen); 1265 1266#ifdef KSSL_DEBUG 1267 fprintf(stderr, "tls1_export_keying_material() complete\n"); 1268#endif /* KSSL_DEBUG */ 1269 goto ret; 1270 err1: 1271 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, 1272 SSL_R_TLS_ILLEGAL_EXPORTER_LABEL); 1273 rv = 0; 1274 goto ret; 1275 err2: 1276 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE); 1277 rv = 0; 1278 ret: 1279 if (buff != NULL) 1280 OPENSSL_free(buff); 1281 if (val != NULL) 1282 OPENSSL_free(val); 1283 return (rv); 1284} 1285 1286int tls1_alert_code(int code) 1287{ 1288 switch (code) { 1289 case SSL_AD_CLOSE_NOTIFY: 1290 return (SSL3_AD_CLOSE_NOTIFY); 1291 case SSL_AD_UNEXPECTED_MESSAGE: 1292 return (SSL3_AD_UNEXPECTED_MESSAGE); 1293 case SSL_AD_BAD_RECORD_MAC: 1294 return (SSL3_AD_BAD_RECORD_MAC); 1295 case SSL_AD_DECRYPTION_FAILED: 1296 return (TLS1_AD_DECRYPTION_FAILED); 1297 case SSL_AD_RECORD_OVERFLOW: 1298 return (TLS1_AD_RECORD_OVERFLOW); 1299 case SSL_AD_DECOMPRESSION_FAILURE: 1300 return (SSL3_AD_DECOMPRESSION_FAILURE); 1301 case SSL_AD_HANDSHAKE_FAILURE: 1302 return (SSL3_AD_HANDSHAKE_FAILURE); 1303 case SSL_AD_NO_CERTIFICATE: 1304 return (-1); 1305 case SSL_AD_BAD_CERTIFICATE: 1306 return (SSL3_AD_BAD_CERTIFICATE); 1307 case SSL_AD_UNSUPPORTED_CERTIFICATE: 1308 return (SSL3_AD_UNSUPPORTED_CERTIFICATE); 1309 case SSL_AD_CERTIFICATE_REVOKED: 1310 return (SSL3_AD_CERTIFICATE_REVOKED); 1311 case SSL_AD_CERTIFICATE_EXPIRED: 1312 return (SSL3_AD_CERTIFICATE_EXPIRED); 1313 case SSL_AD_CERTIFICATE_UNKNOWN: 1314 return (SSL3_AD_CERTIFICATE_UNKNOWN); 1315 case SSL_AD_ILLEGAL_PARAMETER: 1316 return (SSL3_AD_ILLEGAL_PARAMETER); 1317 case SSL_AD_UNKNOWN_CA: 1318 return (TLS1_AD_UNKNOWN_CA); 1319 case SSL_AD_ACCESS_DENIED: 1320 return (TLS1_AD_ACCESS_DENIED); 1321 case SSL_AD_DECODE_ERROR: 1322 return (TLS1_AD_DECODE_ERROR); 1323 case SSL_AD_DECRYPT_ERROR: 1324 return (TLS1_AD_DECRYPT_ERROR); 1325 case SSL_AD_EXPORT_RESTRICTION: 1326 return (TLS1_AD_EXPORT_RESTRICTION); 1327 case SSL_AD_PROTOCOL_VERSION: 1328 return (TLS1_AD_PROTOCOL_VERSION); 1329 case SSL_AD_INSUFFICIENT_SECURITY: 1330 return (TLS1_AD_INSUFFICIENT_SECURITY); 1331 case SSL_AD_INTERNAL_ERROR: 1332 return (TLS1_AD_INTERNAL_ERROR); 1333 case SSL_AD_USER_CANCELLED: 1334 return (TLS1_AD_USER_CANCELLED); 1335 case SSL_AD_NO_RENEGOTIATION: 1336 return (TLS1_AD_NO_RENEGOTIATION); 1337 case SSL_AD_UNSUPPORTED_EXTENSION: 1338 return (TLS1_AD_UNSUPPORTED_EXTENSION); 1339 case SSL_AD_CERTIFICATE_UNOBTAINABLE: 1340 return (TLS1_AD_CERTIFICATE_UNOBTAINABLE); 1341 case SSL_AD_UNRECOGNIZED_NAME: 1342 return (TLS1_AD_UNRECOGNIZED_NAME); 1343 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: 1344 return (TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE); 1345 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: 1346 return (TLS1_AD_BAD_CERTIFICATE_HASH_VALUE); 1347 case SSL_AD_UNKNOWN_PSK_IDENTITY: 1348 return (TLS1_AD_UNKNOWN_PSK_IDENTITY); 1349 case SSL_AD_INAPPROPRIATE_FALLBACK: 1350 return (TLS1_AD_INAPPROPRIATE_FALLBACK); 1351#if 0 1352 /* not appropriate for TLS, not used for DTLS */ 1353 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: 1354 return (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 1355#endif 1356 default: 1357 return (-1); 1358 } 1359} 1360