1 /* ssl/t1_enc.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 (at) 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 (at) cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh (at) 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", s->s3->tmp.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 /* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively. 671 * 672 * Returns: 673 * 0: (in non-constant time) if the record is publically invalid (i.e. too 674 * short etc). 675 * 1: if the record's padding is valid / the encryption was successful. 676 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending, 677 * an internal error occured. 678 */ 679 int tls1_enc(SSL *s, int send) 680 { 681 SSL3_RECORD *rec; 682 EVP_CIPHER_CTX *ds; 683 unsigned long l; 684 int bs,i,j,k,pad=0,ret,mac_size=0; 685 const EVP_CIPHER *enc; 686 687 if (send) 688 { 689 if (EVP_MD_CTX_md(s->write_hash)) 690 { 691 int n=EVP_MD_CTX_size(s->write_hash); 692 OPENSSL_assert(n >= 0); 693 } 694 ds=s->enc_write_ctx; 695 rec= &(s->s3->wrec); 696 if (s->enc_write_ctx == NULL) 697 enc=NULL; 698 else 699 { 700 int ivlen; 701 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); 702 /* For TLSv1.1 and later explicit IV */ 703 if (s->version >= TLS1_1_VERSION 704 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE) 705 ivlen = EVP_CIPHER_iv_length(enc); 706 else 707 ivlen = 0; 708 if (ivlen > 1) 709 { 710 if ( rec->data != rec->input) 711 /* we can't write into the input stream: 712 * Can this ever happen?? (steve) 713 */ 714 fprintf(stderr, 715 "%s:%d: rec->data != rec->input\n", 716 __FILE__, __LINE__); 717 else if (RAND_bytes(rec->input, ivlen) <= 0) 718 return -1; 719 } 720 } 721 } 722 else 723 { 724 if (EVP_MD_CTX_md(s->read_hash)) 725 { 726 int n=EVP_MD_CTX_size(s->read_hash); 727 OPENSSL_assert(n >= 0); 728 } 729 ds=s->enc_read_ctx; 730 rec= &(s->s3->rrec); 731 if (s->enc_read_ctx == NULL) 732 enc=NULL; 733 else 734 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); 735 } 736 737 #ifdef KSSL_DEBUG 738 printf("tls1_enc(%d)\n", send); 739 #endif /* KSSL_DEBUG */ 740 741 if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) 742 { 743 memmove(rec->data,rec->input,rec->length); 744 rec->input=rec->data; 745 ret = 1; 746 } 747 else 748 { 749 l=rec->length; 750 bs=EVP_CIPHER_block_size(ds->cipher); 751 752 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER) 753 { 754 unsigned char buf[13],*seq; 755 756 seq = send?s->s3->write_sequence:s->s3->read_sequence; 757 758 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) 759 { 760 unsigned char dtlsseq[9],*p=dtlsseq; 761 762 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p); 763 memcpy(p,&seq[2],6); 764 memcpy(buf,dtlsseq,8); 765 } 766 else 767 { 768 memcpy(buf,seq,8); 769 for (i=7; i>=0; i--) /* increment */ 770 { 771 ++seq[i]; 772 if (seq[i] != 0) break; 773 } 774 } 775 776 buf[8]=rec->type; 777 buf[9]=(unsigned char)(s->version>>8); 778 buf[10]=(unsigned char)(s->version); 779 buf[11]=rec->length>>8; 780 buf[12]=rec->length&0xff; 781 pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf); 782 if (send) 783 { 784 l+=pad; 785 rec->length+=pad; 786 } 787 } 788 else if ((bs != 1) && send) 789 { 790 i=bs-((int)l%bs); 791 792 /* Add weird padding of upto 256 bytes */ 793 794 /* we need to add 'i' padding bytes of value j */ 795 j=i-1; 796 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) 797 { 798 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 799 j++; 800 } 801 for (k=(int)l; k<(int)(l+i); k++) 802 rec->input[k]=j; 803 l+=i; 804 rec->length+=i; 805 } 806 807 #ifdef KSSL_DEBUG 808 { 809 unsigned long ui; 810 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", 811 ds,rec->data,rec->input,l); 812 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n", 813 ds->buf_len, ds->cipher->key_len, 814 DES_KEY_SZ, DES_SCHEDULE_SZ, 815 ds->cipher->iv_len); 816 printf("\t\tIV: "); 817 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); 818 printf("\n"); 819 printf("\trec->input="); 820 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); 821 printf("\n"); 822 } 823 #endif /* KSSL_DEBUG */ 824 825 if (!send) 826 { 827 if (l == 0 || l%bs != 0) 828 return 0; 829 } 830 831 i = EVP_Cipher(ds,rec->data,rec->input,l); 832 if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER) 833 ?(i<0) 834 :(i==0)) 835 return -1; /* AEAD can fail to verify MAC */ 836 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) 837 { 838 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN; 839 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN; 840 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN; 841 } 842 843 #ifdef KSSL_DEBUG 844 { 845 unsigned long i; 846 printf("\trec->data="); 847 for (i=0; i<l; i++) 848 printf(" %02x", rec->data[i]); printf("\n"); 849 } 850 #endif /* KSSL_DEBUG */ 851 852 ret = 1; 853 if (EVP_MD_CTX_md(s->read_hash) != NULL) 854 mac_size = EVP_MD_CTX_size(s->read_hash); 855 if ((bs != 1) && !send) 856 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size); 857 if (pad && !send) 858 rec->length -= pad; 859 } 860 return ret; 861 } 862 863 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out) 864 { 865 unsigned int ret; 866 EVP_MD_CTX ctx, *d=NULL; 867 int i; 868 869 if (s->s3->handshake_buffer) 870 if (!ssl3_digest_cached_records(s)) 871 return 0; 872 873 for (i=0;i<SSL_MAX_DIGEST;i++) 874 { 875 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid) 876 { 877 d=s->s3->handshake_dgst[i]; 878 break; 879 } 880 } 881 if (!d) { 882 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST); 883 return 0; 884 } 885 886 EVP_MD_CTX_init(&ctx); 887 EVP_MD_CTX_copy_ex(&ctx,d); 888 EVP_DigestFinal_ex(&ctx,out,&ret); 889 EVP_MD_CTX_cleanup(&ctx); 890 return((int)ret); 891 } 892 893 int tls1_final_finish_mac(SSL *s, 894 const char *str, int slen, unsigned char *out) 895 { 896 unsigned int i; 897 EVP_MD_CTX ctx; 898 unsigned char buf[2*EVP_MAX_MD_SIZE]; 899 unsigned char *q,buf2[12]; 900 int idx; 901 long mask; 902 int err=0; 903 const EVP_MD *md; 904 905 q=buf; 906 907 if (s->s3->handshake_buffer) 908 if (!ssl3_digest_cached_records(s)) 909 return 0; 910 911 EVP_MD_CTX_init(&ctx); 912 913 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++) 914 { 915 if (mask & ssl_get_algorithm2(s)) 916 { 917 int hashsize = EVP_MD_size(md); 918 if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf))) 919 { 920 /* internal error: 'buf' is too small for this cipersuite! */ 921 err = 1; 922 } 923 else 924 { 925 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]); 926 EVP_DigestFinal_ex(&ctx,q,&i); 927 if (i != (unsigned int)hashsize) /* can't really happen */ 928 err = 1; 929 q+=i; 930 } 931 } 932 } 933 934 if (!tls1_PRF(ssl_get_algorithm2(s), 935 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0, 936 s->session->master_key,s->session->master_key_length, 937 out,buf2,sizeof buf2)) 938 err = 1; 939 EVP_MD_CTX_cleanup(&ctx); 940 941 if (err) 942 return 0; 943 else 944 return sizeof buf2; 945 } 946 947 int tls1_mac(SSL *ssl, unsigned char *md, int send) 948 { 949 SSL3_RECORD *rec; 950 unsigned char *seq; 951 EVP_MD_CTX *hash; 952 size_t md_size, orig_len; 953 int i; 954 EVP_MD_CTX hmac, *mac_ctx; 955 unsigned char header[13]; 956 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM)); 957 int t; 958 959 if (send) 960 { 961 rec= &(ssl->s3->wrec); 962 seq= &(ssl->s3->write_sequence[0]); 963 hash=ssl->write_hash; 964 } 965 else 966 { 967 rec= &(ssl->s3->rrec); 968 seq= &(ssl->s3->read_sequence[0]); 969 hash=ssl->read_hash; 970 } 971 972 t=EVP_MD_CTX_size(hash); 973 OPENSSL_assert(t >= 0); 974 md_size=t; 975 976 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ 977 if (stream_mac) 978 { 979 mac_ctx = hash; 980 } 981 else 982 { 983 EVP_MD_CTX_copy(&hmac,hash); 984 mac_ctx = &hmac; 985 } 986 987 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) 988 { 989 unsigned char dtlsseq[8],*p=dtlsseq; 990 991 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); 992 memcpy (p,&seq[2],6); 993 994 memcpy(header, dtlsseq, 8); 995 } 996 else 997 memcpy(header, seq, 8); 998 999 /* kludge: tls1_cbc_remove_padding passes padding length in rec->type */ 1000 orig_len = rec->length+md_size+((unsigned int)rec->type>>8); 1001 rec->type &= 0xff; 1002 1003 header[8]=rec->type; 1004 header[9]=(unsigned char)(ssl->version>>8); 1005 header[10]=(unsigned char)(ssl->version); 1006 header[11]=(rec->length)>>8; 1007 header[12]=(rec->length)&0xff; 1008 1009 if (!send && 1010 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE && 1011 ssl3_cbc_record_digest_supported(mac_ctx)) 1012 { 1013 /* This is a CBC-encrypted record. We must avoid leaking any 1014 * timing-side channel information about how many blocks of 1015 * data we are hashing because that gives an attacker a 1016 * timing-oracle. */ 1017 ssl3_cbc_digest_record( 1018 mac_ctx, 1019 md, &md_size, 1020 header, rec->input, 1021 rec->length + md_size, orig_len, 1022 ssl->s3->read_mac_secret, 1023 ssl->s3->read_mac_secret_size, 1024 0 /* not SSLv3 */); 1025 } 1026 else 1027 { 1028 EVP_DigestSignUpdate(mac_ctx,header,sizeof(header)); 1029 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length); 1030 t=EVP_DigestSignFinal(mac_ctx,md,&md_size); 1031 OPENSSL_assert(t > 0); 1032 #ifdef OPENSSL_FIPS 1033 if (!send && FIPS_mode()) 1034 tls_fips_digest_extra( 1035 ssl->enc_read_ctx, 1036 mac_ctx, rec->input, 1037 rec->length, orig_len); 1038 #endif 1039 } 1040 1041 if (!stream_mac) 1042 EVP_MD_CTX_cleanup(&hmac); 1043 #ifdef TLS_DEBUG 1044 printf("sec="); 1045 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } 1046 printf("seq="); 1047 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } 1048 printf("buf="); 1049 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } 1050 printf("rec="); 1051 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } 1052 #endif 1053 1054 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) 1055 { 1056 for (i=7; i>=0; i--) 1057 { 1058 ++seq[i]; 1059 if (seq[i] != 0) break; 1060 } 1061 } 1062 1063 #ifdef TLS_DEBUG 1064 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } 1065 #endif 1066 return(md_size); 1067 } 1068 1069 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, 1070 int len) 1071 { 1072 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; 1073 const void *co = NULL, *so = NULL; 1074 int col = 0, sol = 0; 1075 1076 1077 #ifdef KSSL_DEBUG 1078 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len); 1079 #endif /* KSSL_DEBUG */ 1080 1081 #ifdef TLSEXT_TYPE_opaque_prf_input 1082 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL && 1083 s->s3->client_opaque_prf_input_len > 0 && 1084 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len) 1085 { 1086 co = s->s3->client_opaque_prf_input; 1087 col = s->s3->server_opaque_prf_input_len; 1088 so = s->s3->server_opaque_prf_input; 1089 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) */ 1090 } 1091 #endif 1092 1093 tls1_PRF(ssl_get_algorithm2(s), 1094 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE, 1095 s->s3->client_random,SSL3_RANDOM_SIZE, 1096 co, col, 1097 s->s3->server_random,SSL3_RANDOM_SIZE, 1098 so, sol, 1099 p,len, 1100 s->session->master_key,buff,sizeof buff); 1101 #ifdef SSL_DEBUG 1102 fprintf(stderr, "Premaster Secret:\n"); 1103 BIO_dump_fp(stderr, (char *)p, len); 1104 fprintf(stderr, "Client Random:\n"); 1105 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE); 1106 fprintf(stderr, "Server Random:\n"); 1107 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE); 1108 fprintf(stderr, "Master Secret:\n"); 1109 BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE); 1110 #endif 1111 1112 #ifdef KSSL_DEBUG 1113 printf ("tls1_generate_master_secret() complete\n"); 1114 #endif /* KSSL_DEBUG */ 1115 return(SSL3_MASTER_SECRET_SIZE); 1116 } 1117 1118 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1119 const char *label, size_t llen, const unsigned char *context, 1120 size_t contextlen, int use_context) 1121 { 1122 unsigned char *buff; 1123 unsigned char *val = NULL; 1124 size_t vallen, currentvalpos; 1125 int rv; 1126 1127 #ifdef KSSL_DEBUG 1128 printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, p, plen); 1129 #endif /* KSSL_DEBUG */ 1130 1131 buff = OPENSSL_malloc(olen); 1132 if (buff == NULL) goto err2; 1133 1134 /* construct PRF arguments 1135 * we construct the PRF argument ourself rather than passing separate 1136 * values into the TLS PRF to ensure that the concatenation of values 1137 * does not create a prohibited label. 1138 */ 1139 vallen = llen + SSL3_RANDOM_SIZE * 2; 1140 if (use_context) 1141 { 1142 vallen += 2 + contextlen; 1143 } 1144 1145 val = OPENSSL_malloc(vallen); 1146 if (val == NULL) goto err2; 1147 currentvalpos = 0; 1148 memcpy(val + currentvalpos, (unsigned char *) label, llen); 1149 currentvalpos += llen; 1150 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE); 1151 currentvalpos += SSL3_RANDOM_SIZE; 1152 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE); 1153 currentvalpos += SSL3_RANDOM_SIZE; 1154 1155 if (use_context) 1156 { 1157 val[currentvalpos] = (contextlen >> 8) & 0xff; 1158 currentvalpos++; 1159 val[currentvalpos] = contextlen & 0xff; 1160 currentvalpos++; 1161 if ((contextlen > 0) || (context != NULL)) 1162 { 1163 memcpy(val + currentvalpos, context, contextlen); 1164 } 1165 } 1166 1167 /* disallow prohibited labels 1168 * note that SSL3_RANDOM_SIZE > max(prohibited label len) = 1169 * 15, so size of val > max(prohibited label len) = 15 and the 1170 * comparisons won't have buffer overflow 1171 */ 1172 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST, 1173 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1; 1174 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST, 1175 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1; 1176 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST, 1177 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1; 1178 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST, 1179 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1; 1180 1181 rv = tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 1182 val, vallen, 1183 NULL, 0, 1184 NULL, 0, 1185 NULL, 0, 1186 NULL, 0, 1187 s->session->master_key,s->session->master_key_length, 1188 out,buff,olen); 1189 1190 #ifdef KSSL_DEBUG 1191 printf ("tls1_export_keying_material() complete\n"); 1192 #endif /* KSSL_DEBUG */ 1193 goto ret; 1194 err1: 1195 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL); 1196 rv = 0; 1197 goto ret; 1198 err2: 1199 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE); 1200 rv = 0; 1201 ret: 1202 if (buff != NULL) OPENSSL_free(buff); 1203 if (val != NULL) OPENSSL_free(val); 1204 return(rv); 1205 } 1206 1207 int tls1_alert_code(int code) 1208 { 1209 switch (code) 1210 { 1211 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); 1212 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); 1213 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); 1214 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); 1215 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); 1216 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); 1217 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); 1218 case SSL_AD_NO_CERTIFICATE: return(-1); 1219 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); 1220 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); 1221 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); 1222 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); 1223 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); 1224 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); 1225 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); 1226 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); 1227 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); 1228 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); 1229 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); 1230 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); 1231 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); 1232 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); 1233 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); 1234 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); 1235 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION); 1236 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE); 1237 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME); 1238 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE); 1239 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE); 1240 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY); 1241 #if 0 /* not appropriate for TLS, not used for DTLS */ 1242 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return 1243 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 1244 #endif 1245 default: return(-1); 1246 } 1247 } 1248
