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 k=EVP_CIPHER_iv_length(c); 460 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || 461 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) 462 { 463 ms= &(p[ 0]); n=i+i; 464 key= &(p[ n]); n+=j+j; 465 iv= &(p[ n]); n+=k+k; 466 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; 467 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; 468 client_write=1; 469 } 470 else 471 { 472 n=i; 473 ms= &(p[ n]); n+=i+j; 474 key= &(p[ n]); n+=j+k; 475 iv= &(p[ n]); n+=k; 476 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; 477 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; 478 client_write=0; 479 } 480 481 if (n > s->s3->tmp.key_block_length) 482 { 483 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); 484 goto err2; 485 } 486 487 memcpy(mac_secret,ms,i); 488 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, 489 mac_secret,*mac_secret_size); 490 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key); 491 EVP_PKEY_free(mac_key); 492 #ifdef TLS_DEBUG 493 printf("which = %04X\nmac key=",which); 494 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } 495 #endif 496 if (is_export) 497 { 498 /* In here I set both the read and write key/iv to the 499 * same value since only the correct one will be used :-). 500 */ 501 if (!tls1_PRF(ssl_get_algorithm2(s), 502 exp_label,exp_label_len, 503 s->s3->client_random,SSL3_RANDOM_SIZE, 504 s->s3->server_random,SSL3_RANDOM_SIZE, 505 NULL,0,NULL,0, 506 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c))) 507 goto err2; 508 key=tmp1; 509 510 if (k > 0) 511 { 512 if (!tls1_PRF(ssl_get_algorithm2(s), 513 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE, 514 s->s3->client_random,SSL3_RANDOM_SIZE, 515 s->s3->server_random,SSL3_RANDOM_SIZE, 516 NULL,0,NULL,0, 517 empty,0,iv1,iv2,k*2)) 518 goto err2; 519 if (client_write) 520 iv=iv1; 521 else 522 iv= &(iv1[k]); 523 } 524 } 525 526 s->session->key_arg_length=0; 527 #ifdef KSSL_DEBUG 528 { 529 int i; 530 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); 531 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]); 532 printf("\n"); 533 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]); 534 printf("\n"); 535 } 536 #endif /* KSSL_DEBUG */ 537 538 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); 539 #ifdef TLS_DEBUG 540 printf("which = %04X\nkey=",which); 541 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } 542 printf("\niv="); 543 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } 544 printf("\n"); 545 #endif 546 547 OPENSSL_cleanse(tmp1,sizeof(tmp1)); 548 OPENSSL_cleanse(tmp2,sizeof(tmp1)); 549 OPENSSL_cleanse(iv1,sizeof(iv1)); 550 OPENSSL_cleanse(iv2,sizeof(iv2)); 551 return(1); 552 err: 553 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); 554 err2: 555 return(0); 556 } 557 558 int tls1_setup_key_block(SSL *s) 559 { 560 unsigned char *p1,*p2=NULL; 561 const EVP_CIPHER *c; 562 const EVP_MD *hash; 563 int num; 564 SSL_COMP *comp; 565 int mac_type= NID_undef,mac_secret_size=0; 566 int ret=0; 567 568 #ifdef KSSL_DEBUG 569 printf ("tls1_setup_key_block()\n"); 570 #endif /* KSSL_DEBUG */ 571 572 if (s->s3->tmp.key_block_length != 0) 573 return(1); 574 575 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp)) 576 { 577 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); 578 return(0); 579 } 580 581 s->s3->tmp.new_sym_enc=c; 582 s->s3->tmp.new_hash=hash; 583 s->s3->tmp.new_mac_pkey_type = mac_type; 584 s->s3->tmp.new_mac_secret_size = mac_secret_size; 585 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c); 586 num*=2; 587 588 ssl3_cleanup_key_block(s); 589 590 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) 591 { 592 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 593 goto err; 594 } 595 596 s->s3->tmp.key_block_length=num; 597 s->s3->tmp.key_block=p1; 598 599 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) 600 { 601 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 602 goto err; 603 } 604 605 #ifdef TLS_DEBUG 606 printf("client random\n"); 607 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } 608 printf("server random\n"); 609 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } 610 printf("pre-master\n"); 611 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } 612 #endif 613 if (!tls1_generate_key_block(s,p1,p2,num)) 614 goto err; 615 #ifdef TLS_DEBUG 616 printf("\nkey block\n"); 617 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } 618 #endif 619 620 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) 621 && s->method->version <= TLS1_VERSION) 622 { 623 /* enable vulnerability countermeasure for CBC ciphers with 624 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt) 625 */ 626 s->s3->need_empty_fragments = 1; 627 628 if (s->session->cipher != NULL) 629 { 630 if (s->session->cipher->algorithm_enc == SSL_eNULL) 631 s->s3->need_empty_fragments = 0; 632 633 #ifndef OPENSSL_NO_RC4 634 if (s->session->cipher->algorithm_enc == SSL_RC4) 635 s->s3->need_empty_fragments = 0; 636 #endif 637 } 638 } 639 640 ret = 1; 641 err: 642 if (p2) 643 { 644 OPENSSL_cleanse(p2,num); 645 OPENSSL_free(p2); 646 } 647 return(ret); 648 } 649 650 int tls1_enc(SSL *s, int send) 651 { 652 SSL3_RECORD *rec; 653 EVP_CIPHER_CTX *ds; 654 unsigned long l; 655 int bs,i,ii,j,k,n=0; 656 const EVP_CIPHER *enc; 657 658 if (send) 659 { 660 if (EVP_MD_CTX_md(s->write_hash)) 661 { 662 n=EVP_MD_CTX_size(s->write_hash); 663 OPENSSL_assert(n >= 0); 664 } 665 ds=s->enc_write_ctx; 666 rec= &(s->s3->wrec); 667 if (s->enc_write_ctx == NULL) 668 enc=NULL; 669 else 670 { 671 int ivlen; 672 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); 673 /* For TLSv1.1 and later explicit IV */ 674 if (s->version >= TLS1_1_VERSION 675 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE) 676 ivlen = EVP_CIPHER_iv_length(enc); 677 else 678 ivlen = 0; 679 if (ivlen > 1) 680 { 681 if ( rec->data != rec->input) 682 /* we can't write into the input stream: 683 * Can this ever happen?? (steve) 684 */ 685 fprintf(stderr, 686 "%s:%d: rec->data != rec->input\n", 687 __FILE__, __LINE__); 688 else if (RAND_bytes(rec->input, ivlen) <= 0) 689 return -1; 690 } 691 } 692 } 693 else 694 { 695 if (EVP_MD_CTX_md(s->read_hash)) 696 { 697 n=EVP_MD_CTX_size(s->read_hash); 698 OPENSSL_assert(n >= 0); 699 } 700 ds=s->enc_read_ctx; 701 rec= &(s->s3->rrec); 702 if (s->enc_read_ctx == NULL) 703 enc=NULL; 704 else 705 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); 706 } 707 708 #ifdef KSSL_DEBUG 709 printf("tls1_enc(%d)\n", send); 710 #endif /* KSSL_DEBUG */ 711 712 if ((s->session == NULL) || (ds == NULL) || 713 (enc == NULL)) 714 { 715 memmove(rec->data,rec->input,rec->length); 716 rec->input=rec->data; 717 } 718 else 719 { 720 l=rec->length; 721 bs=EVP_CIPHER_block_size(ds->cipher); 722 723 if ((bs != 1) && send) 724 { 725 i=bs-((int)l%bs); 726 727 /* Add weird padding of upto 256 bytes */ 728 729 /* we need to add 'i' padding bytes of value j */ 730 j=i-1; 731 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) 732 { 733 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 734 j++; 735 } 736 for (k=(int)l; k<(int)(l+i); k++) 737 rec->input[k]=j; 738 l+=i; 739 rec->length+=i; 740 } 741 742 #ifdef KSSL_DEBUG 743 { 744 unsigned long ui; 745 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", 746 ds,rec->data,rec->input,l); 747 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n", 748 ds->buf_len, ds->cipher->key_len, 749 DES_KEY_SZ, DES_SCHEDULE_SZ, 750 ds->cipher->iv_len); 751 printf("\t\tIV: "); 752 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); 753 printf("\n"); 754 printf("\trec->input="); 755 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); 756 printf("\n"); 757 } 758 #endif /* KSSL_DEBUG */ 759 760 if (!send) 761 { 762 if (l == 0 || l%bs != 0) 763 { 764 if (s->version >= TLS1_1_VERSION) 765 return -1; 766 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); 767 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); 768 return 0; 769 } 770 } 771 772 EVP_Cipher(ds,rec->data,rec->input,l); 773 774 #ifdef KSSL_DEBUG 775 { 776 unsigned long i; 777 printf("\trec->data="); 778 for (i=0; i<l; i++) 779 printf(" %02x", rec->data[i]); printf("\n"); 780 } 781 #endif /* KSSL_DEBUG */ 782 783 if ((bs != 1) && !send) 784 { 785 ii=i=rec->data[l-1]; /* padding_length */ 786 i++; 787 /* NB: if compression is in operation the first packet 788 * may not be of even length so the padding bug check 789 * cannot be performed. This bug workaround has been 790 * around since SSLeay so hopefully it is either fixed 791 * now or no buggy implementation supports compression 792 * [steve] 793 */ 794 if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) 795 && !s->expand) 796 { 797 /* First packet is even in size, so check */ 798 if ((memcmp(s->s3->read_sequence, 799 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) 800 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; 801 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 802 i--; 803 } 804 /* TLS 1.0 does not bound the number of padding bytes by the block size. 805 * All of them must have value 'padding_length'. */ 806 if (i > (int)rec->length) 807 { 808 /* Incorrect padding. SSLerr() and ssl3_alert are done 809 * by caller: we don't want to reveal whether this is 810 * a decryption error or a MAC verification failure 811 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */ 812 return -1; 813 } 814 for (j=(int)(l-i); j<(int)l; j++) 815 { 816 if (rec->data[j] != ii) 817 { 818 /* Incorrect padding */ 819 return -1; 820 } 821 } 822 rec->length -=i; 823 if (s->version >= TLS1_1_VERSION 824 && EVP_CIPHER_CTX_mode(ds) == EVP_CIPH_CBC_MODE) 825 { 826 rec->data += bs; /* skip the explicit IV */ 827 rec->input += bs; 828 rec->length -= bs; 829 } 830 } 831 } 832 return(1); 833 } 834 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out) 835 { 836 unsigned int ret; 837 EVP_MD_CTX ctx, *d=NULL; 838 int i; 839 840 if (s->s3->handshake_buffer) 841 if (!ssl3_digest_cached_records(s)) 842 return 0; 843 844 if (s->s3->handshake_dgst) { 845 for (i=0;i<SSL_MAX_DIGEST;i++) 846 { 847 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid) 848 { 849 d=s->s3->handshake_dgst[i]; 850 break; 851 } 852 } 853 } 854 if (!d) { 855 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST); 856 return 0; 857 } 858 859 EVP_MD_CTX_init(&ctx); 860 EVP_MD_CTX_copy_ex(&ctx,d); 861 EVP_DigestFinal_ex(&ctx,out,&ret); 862 EVP_MD_CTX_cleanup(&ctx); 863 return((int)ret); 864 } 865 866 int tls1_final_finish_mac(SSL *s, 867 const char *str, int slen, unsigned char *out) 868 { 869 unsigned int i; 870 EVP_MD_CTX ctx; 871 unsigned char buf[2*EVP_MAX_MD_SIZE]; 872 unsigned char *q,buf2[12]; 873 int idx; 874 long mask; 875 int err=0; 876 const EVP_MD *md; 877 878 q=buf; 879 880 if (s->s3->handshake_buffer) 881 if (!ssl3_digest_cached_records(s)) 882 return 0; 883 884 EVP_MD_CTX_init(&ctx); 885 886 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++) 887 { 888 if (mask & ssl_get_algorithm2(s)) 889 { 890 int hashsize = EVP_MD_size(md); 891 if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)) || s->s3->handshake_dgst == NULL) 892 { 893 /* internal error: 'buf' is too small for this cipersuite! */ 894 err = 1; 895 } 896 else 897 { 898 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]); 899 EVP_DigestFinal_ex(&ctx,q,&i); 900 if (i != (unsigned int)hashsize) /* can't really happen */ 901 err = 1; 902 q+=i; 903 } 904 } 905 } 906 907 if (!tls1_PRF(ssl_get_algorithm2(s), 908 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0, 909 s->session->master_key,s->session->master_key_length, 910 out,buf2,sizeof buf2)) 911 err = 1; 912 EVP_MD_CTX_cleanup(&ctx); 913 914 if (err) 915 return 0; 916 else 917 return sizeof buf2; 918 } 919 920 int tls1_mac(SSL *ssl, unsigned char *md, int send) 921 { 922 SSL3_RECORD *rec; 923 unsigned char *seq; 924 EVP_MD_CTX *hash; 925 size_t md_size; 926 int i; 927 EVP_MD_CTX hmac, *mac_ctx; 928 unsigned char buf[5]; 929 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM)); 930 int t; 931 932 if (send) 933 { 934 rec= &(ssl->s3->wrec); 935 seq= &(ssl->s3->write_sequence[0]); 936 hash=ssl->write_hash; 937 } 938 else 939 { 940 rec= &(ssl->s3->rrec); 941 seq= &(ssl->s3->read_sequence[0]); 942 hash=ssl->read_hash; 943 } 944 945 t=EVP_MD_CTX_size(hash); 946 OPENSSL_assert(t >= 0); 947 md_size=t; 948 949 buf[0]=rec->type; 950 buf[1]=(unsigned char)(ssl->version>>8); 951 buf[2]=(unsigned char)(ssl->version); 952 buf[3]=rec->length>>8; 953 buf[4]=rec->length&0xff; 954 955 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ 956 if (stream_mac) 957 { 958 mac_ctx = hash; 959 } 960 else 961 { 962 EVP_MD_CTX_copy(&hmac,hash); 963 mac_ctx = &hmac; 964 } 965 966 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) 967 { 968 unsigned char dtlsseq[8],*p=dtlsseq; 969 970 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); 971 memcpy (p,&seq[2],6); 972 973 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8); 974 } 975 else 976 EVP_DigestSignUpdate(mac_ctx,seq,8); 977 978 EVP_DigestSignUpdate(mac_ctx,buf,5); 979 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length); 980 t=EVP_DigestSignFinal(mac_ctx,md,&md_size); 981 OPENSSL_assert(t > 0); 982 983 if (!stream_mac) EVP_MD_CTX_cleanup(&hmac); 984 #ifdef TLS_DEBUG 985 printf("sec="); 986 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } 987 printf("seq="); 988 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } 989 printf("buf="); 990 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } 991 printf("rec="); 992 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } 993 #endif 994 995 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) 996 { 997 for (i=7; i>=0; i--) 998 { 999 ++seq[i]; 1000 if (seq[i] != 0) break; 1001 } 1002 } 1003 1004 #ifdef TLS_DEBUG 1005 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } 1006 #endif 1007 return(md_size); 1008 } 1009 1010 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, 1011 int len) 1012 { 1013 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; 1014 const void *co = NULL, *so = NULL; 1015 int col = 0, sol = 0; 1016 1017 1018 #ifdef KSSL_DEBUG 1019 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len); 1020 #endif /* KSSL_DEBUG */ 1021 1022 #ifdef TLSEXT_TYPE_opaque_prf_input 1023 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL && 1024 s->s3->client_opaque_prf_input_len > 0 && 1025 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len) 1026 { 1027 co = s->s3->client_opaque_prf_input; 1028 col = s->s3->server_opaque_prf_input_len; 1029 so = s->s3->server_opaque_prf_input; 1030 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) */ 1031 } 1032 #endif 1033 1034 tls1_PRF(ssl_get_algorithm2(s), 1035 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE, 1036 s->s3->client_random,SSL3_RANDOM_SIZE, 1037 co, col, 1038 s->s3->server_random,SSL3_RANDOM_SIZE, 1039 so, sol, 1040 p,len, 1041 s->session->master_key,buff,sizeof buff); 1042 #ifdef SSL_DEBUG 1043 fprintf(stderr, "Premaster Secret:\n"); 1044 BIO_dump_fp(stderr, (char *)p, len); 1045 fprintf(stderr, "Client Random:\n"); 1046 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE); 1047 fprintf(stderr, "Server Random:\n"); 1048 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE); 1049 fprintf(stderr, "Master Secret:\n"); 1050 BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE); 1051 #endif 1052 1053 #ifdef KSSL_DEBUG 1054 printf ("tls1_generate_master_secret() complete\n"); 1055 #endif /* KSSL_DEBUG */ 1056 return(SSL3_MASTER_SECRET_SIZE); 1057 } 1058 1059 int tls1_alert_code(int code) 1060 { 1061 switch (code) 1062 { 1063 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); 1064 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); 1065 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); 1066 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); 1067 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); 1068 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); 1069 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); 1070 case SSL_AD_NO_CERTIFICATE: return(-1); 1071 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); 1072 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); 1073 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); 1074 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); 1075 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); 1076 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); 1077 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); 1078 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); 1079 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); 1080 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); 1081 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); 1082 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); 1083 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); 1084 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); 1085 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); 1086 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); 1087 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION); 1088 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE); 1089 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME); 1090 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE); 1091 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE); 1092 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY); 1093 #ifndef OPENSSL_NO_SRP 1094 case SSL_AD_MISSING_SRP_USERNAME:return(TLS1_AD_MISSING_SRP_USERNAME); 1095 #endif 1096 #if 0 /* not appropriate for TLS, not used for DTLS */ 1097 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return 1098 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 1099 #endif 1100 default: return(-1); 1101 } 1102 } 1103 1104 int SSL_tls1_key_exporter(SSL *s, unsigned char *label, int label_len, 1105 unsigned char *context, int context_len, 1106 unsigned char *out, int olen) 1107 { 1108 unsigned char *tmp; 1109 int rv; 1110 1111 tmp = OPENSSL_malloc(olen); 1112 1113 if (!tmp) 1114 return 0; 1115 1116 rv = tls1_PRF(ssl_get_algorithm2(s), 1117 label, label_len, 1118 s->s3->client_random,SSL3_RANDOM_SIZE, 1119 s->s3->server_random,SSL3_RANDOM_SIZE, 1120 context, context_len, NULL, 0, 1121 s->session->master_key, s->session->master_key_length, 1122 out, tmp, olen); 1123 1124 OPENSSL_free(tmp); 1125 return rv; 1126 } 1127