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 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 { 312 fprintf(stderr,"%02X", s->session->master_key[i]); 313 } 314 fprintf(stderr,"\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 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, 356 comp); 357 fprintf(stderr,"\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c); 358 fprintf(stderr,"\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n", 359 c->nid,c->block_size,c->key_len,c->iv_len); 360 fprintf(stderr,"\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 fprintf(stderr,"%02x", s->s3->tmp.key_block[i]); fprintf(stderr,"\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 && !SSL_IS_DTLS(s)) 418 reuse_dd = 1; 419 else if ((s->enc_write_ctx=EVP_CIPHER_CTX_new()) == NULL) 420 goto err; 421 dd= s->enc_write_ctx; 422 if (SSL_IS_DTLS(s)) 423 { 424 mac_ctx = EVP_MD_CTX_create(); 425 if (!mac_ctx) 426 goto err; 427 s->write_hash = mac_ctx; 428 } 429 else 430 mac_ctx = ssl_replace_hash(&s->write_hash,NULL); 431 #ifndef OPENSSL_NO_COMP 432 if (s->compress != NULL) 433 { 434 COMP_CTX_free(s->compress); 435 s->compress=NULL; 436 } 437 if (comp != NULL) 438 { 439 s->compress=COMP_CTX_new(comp->method); 440 if (s->compress == NULL) 441 { 442 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 443 goto err2; 444 } 445 } 446 #endif 447 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ 448 if (s->version != DTLS1_VERSION) 449 memset(&(s->s3->write_sequence[0]),0,8); 450 mac_secret= &(s->s3->write_mac_secret[0]); 451 mac_secret_size = &(s->s3->write_mac_secret_size); 452 } 453 454 if (reuse_dd) 455 EVP_CIPHER_CTX_cleanup(dd); 456 457 p=s->s3->tmp.key_block; 458 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size; 459 460 cl=EVP_CIPHER_key_length(c); 461 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? 462 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; 463 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ 464 /* If GCM mode only part of IV comes from PRF */ 465 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) 466 k = EVP_GCM_TLS_FIXED_IV_LEN; 467 else 468 k=EVP_CIPHER_iv_length(c); 469 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || 470 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) 471 { 472 ms= &(p[ 0]); n=i+i; 473 key= &(p[ n]); n+=j+j; 474 iv= &(p[ n]); n+=k+k; 475 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; 476 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; 477 client_write=1; 478 } 479 else 480 { 481 n=i; 482 ms= &(p[ n]); n+=i+j; 483 key= &(p[ n]); n+=j+k; 484 iv= &(p[ n]); n+=k; 485 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; 486 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; 487 client_write=0; 488 } 489 490 if (n > s->s3->tmp.key_block_length) 491 { 492 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); 493 goto err2; 494 } 495 496 memcpy(mac_secret,ms,i); 497 498 if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER)) 499 { 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 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } 508 #endif 509 if (is_export) 510 { 511 /* In here I set both the read and write key/iv to the 512 * same value since only the correct one will be used :-). 513 */ 514 if (!tls1_PRF(ssl_get_algorithm2(s), 515 exp_label,exp_label_len, 516 s->s3->client_random,SSL3_RANDOM_SIZE, 517 s->s3->server_random,SSL3_RANDOM_SIZE, 518 NULL,0,NULL,0, 519 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c))) 520 goto err2; 521 key=tmp1; 522 523 if (k > 0) 524 { 525 if (!tls1_PRF(ssl_get_algorithm2(s), 526 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE, 527 s->s3->client_random,SSL3_RANDOM_SIZE, 528 s->s3->server_random,SSL3_RANDOM_SIZE, 529 NULL,0,NULL,0, 530 empty,0,iv1,iv2,k*2)) 531 goto err2; 532 if (client_write) 533 iv=iv1; 534 else 535 iv= &(iv1[k]); 536 } 537 } 538 539 s->session->key_arg_length=0; 540 #ifdef KSSL_DEBUG 541 { 542 int i; 543 fprintf(stderr,"EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); 544 fprintf(stderr,"\tkey= "); for (i=0; i<c->key_len; i++) fprintf(stderr,"%02x", key[i]); 545 fprintf(stderr,"\n"); 546 fprintf(stderr,"\t iv= "); for (i=0; i<c->iv_len; i++) fprintf(stderr,"%02x", iv[i]); 547 fprintf(stderr,"\n"); 548 } 549 #endif /* KSSL_DEBUG */ 550 551 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) 552 { 553 EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE)); 554 EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv); 555 } 556 else 557 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); 558 559 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */ 560 if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size) 561 EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY, 562 *mac_secret_size,mac_secret); 563 564 #ifdef TLS_DEBUG 565 printf("which = %04X\nkey=",which); 566 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } 567 printf("\niv="); 568 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } 569 printf("\n"); 570 #endif 571 572 OPENSSL_cleanse(tmp1,sizeof(tmp1)); 573 OPENSSL_cleanse(tmp2,sizeof(tmp1)); 574 OPENSSL_cleanse(iv1,sizeof(iv1)); 575 OPENSSL_cleanse(iv2,sizeof(iv2)); 576 return(1); 577 err: 578 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); 579 err2: 580 return(0); 581 } 582 583 int tls1_setup_key_block(SSL *s) 584 { 585 unsigned char *p1,*p2=NULL; 586 const EVP_CIPHER *c; 587 const EVP_MD *hash; 588 int num; 589 SSL_COMP *comp; 590 int mac_type= NID_undef,mac_secret_size=0; 591 int ret=0; 592 593 #ifdef KSSL_DEBUG 594 fprintf(stderr,"tls1_setup_key_block()\n"); 595 #endif /* KSSL_DEBUG */ 596 597 if (s->s3->tmp.key_block_length != 0) 598 return(1); 599 600 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp)) 601 { 602 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); 603 return(0); 604 } 605 606 s->s3->tmp.new_sym_enc=c; 607 s->s3->tmp.new_hash=hash; 608 s->s3->tmp.new_mac_pkey_type = mac_type; 609 s->s3->tmp.new_mac_secret_size = mac_secret_size; 610 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c); 611 num*=2; 612 613 ssl3_cleanup_key_block(s); 614 615 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) 616 { 617 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 618 goto err; 619 } 620 621 s->s3->tmp.key_block_length=num; 622 s->s3->tmp.key_block=p1; 623 624 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) 625 { 626 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 627 goto err; 628 } 629 630 #ifdef TLS_DEBUG 631 printf("client random\n"); 632 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } 633 printf("server random\n"); 634 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } 635 printf("pre-master\n"); 636 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } 637 #endif 638 if (!tls1_generate_key_block(s,p1,p2,num)) 639 goto err; 640 #ifdef TLS_DEBUG 641 printf("\nkey block\n"); 642 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } 643 #endif 644 645 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) 646 && s->method->version <= TLS1_VERSION) 647 { 648 /* enable vulnerability countermeasure for CBC ciphers with 649 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt) 650 */ 651 s->s3->need_empty_fragments = 1; 652 653 if (s->session->cipher != NULL) 654 { 655 if (s->session->cipher->algorithm_enc == SSL_eNULL) 656 s->s3->need_empty_fragments = 0; 657 658 #ifndef OPENSSL_NO_RC4 659 if (s->session->cipher->algorithm_enc == SSL_RC4) 660 s->s3->need_empty_fragments = 0; 661 #endif 662 } 663 } 664 665 ret = 1; 666 err: 667 if (p2) 668 { 669 OPENSSL_cleanse(p2,num); 670 OPENSSL_free(p2); 671 } 672 return(ret); 673 } 674 675 /* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively. 676 * 677 * Returns: 678 * 0: (in non-constant time) if the record is publically invalid (i.e. too 679 * short etc). 680 * 1: if the record's padding is valid / the encryption was successful. 681 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending, 682 * an internal error occured. 683 */ 684 int tls1_enc(SSL *s, int send) 685 { 686 SSL3_RECORD *rec; 687 EVP_CIPHER_CTX *ds; 688 unsigned long l; 689 int bs,i,j,k,pad=0,ret,mac_size=0; 690 const EVP_CIPHER *enc; 691 692 if (send) 693 { 694 if (EVP_MD_CTX_md(s->write_hash)) 695 { 696 int n=EVP_MD_CTX_size(s->write_hash); 697 OPENSSL_assert(n >= 0); 698 } 699 ds=s->enc_write_ctx; 700 rec= &(s->s3->wrec); 701 if (s->enc_write_ctx == NULL) 702 enc=NULL; 703 else 704 { 705 int ivlen; 706 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); 707 /* For TLSv1.1 and later explicit IV */ 708 if (s->version >= TLS1_1_VERSION 709 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE) 710 ivlen = EVP_CIPHER_iv_length(enc); 711 else 712 ivlen = 0; 713 if (ivlen > 1) 714 { 715 if ( rec->data != rec->input) 716 /* we can't write into the input stream: 717 * Can this ever happen?? (steve) 718 */ 719 fprintf(stderr, 720 "%s:%d: rec->data != rec->input\n", 721 __FILE__, __LINE__); 722 else if (RAND_bytes(rec->input, ivlen) <= 0) 723 return -1; 724 } 725 } 726 } 727 else 728 { 729 if (EVP_MD_CTX_md(s->read_hash)) 730 { 731 int n=EVP_MD_CTX_size(s->read_hash); 732 OPENSSL_assert(n >= 0); 733 } 734 ds=s->enc_read_ctx; 735 rec= &(s->s3->rrec); 736 if (s->enc_read_ctx == NULL) 737 enc=NULL; 738 else 739 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); 740 } 741 742 #ifdef KSSL_DEBUG 743 fprintf(stderr,"tls1_enc(%d)\n", send); 744 #endif /* KSSL_DEBUG */ 745 746 if ((s->session == NULL) || (ds == NULL) || (enc == NULL)) 747 { 748 memmove(rec->data,rec->input,rec->length); 749 rec->input=rec->data; 750 ret = 1; 751 } 752 else 753 { 754 l=rec->length; 755 bs=EVP_CIPHER_block_size(ds->cipher); 756 757 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER) 758 { 759 unsigned char buf[13],*seq; 760 761 seq = send?s->s3->write_sequence:s->s3->read_sequence; 762 763 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) 764 { 765 unsigned char dtlsseq[9],*p=dtlsseq; 766 767 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p); 768 memcpy(p,&seq[2],6); 769 memcpy(buf,dtlsseq,8); 770 } 771 else 772 { 773 memcpy(buf,seq,8); 774 for (i=7; i>=0; i--) /* increment */ 775 { 776 ++seq[i]; 777 if (seq[i] != 0) break; 778 } 779 } 780 781 buf[8]=rec->type; 782 buf[9]=(unsigned char)(s->version>>8); 783 buf[10]=(unsigned char)(s->version); 784 buf[11]=rec->length>>8; 785 buf[12]=rec->length&0xff; 786 pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf); 787 if (send) 788 { 789 l+=pad; 790 rec->length+=pad; 791 } 792 } 793 else if ((bs != 1) && send) 794 { 795 i=bs-((int)l%bs); 796 797 /* Add weird padding of upto 256 bytes */ 798 799 /* we need to add 'i' padding bytes of value j */ 800 j=i-1; 801 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) 802 { 803 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 804 j++; 805 } 806 for (k=(int)l; k<(int)(l+i); k++) 807 rec->input[k]=j; 808 l+=i; 809 rec->length+=i; 810 } 811 812 #ifdef KSSL_DEBUG 813 { 814 unsigned long ui; 815 fprintf(stderr,"EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", 816 ds,rec->data,rec->input,l); 817 fprintf(stderr,"\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%lu %lu], %d iv_len\n", 818 ds->buf_len, ds->cipher->key_len, 819 DES_KEY_SZ, DES_SCHEDULE_SZ, 820 ds->cipher->iv_len); 821 fprintf(stderr,"\t\tIV: "); 822 for (i=0; i<ds->cipher->iv_len; i++) fprintf(stderr,"%02X", ds->iv[i]); 823 fprintf(stderr,"\n"); 824 fprintf(stderr,"\trec->input="); 825 for (ui=0; ui<l; ui++) fprintf(stderr," %02x", rec->input[ui]); 826 fprintf(stderr,"\n"); 827 } 828 #endif /* KSSL_DEBUG */ 829 830 if (!send) 831 { 832 if (l == 0 || l%bs != 0) 833 return 0; 834 } 835 836 i = EVP_Cipher(ds,rec->data,rec->input,l); 837 if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER) 838 ?(i<0) 839 :(i==0)) 840 return -1; /* AEAD can fail to verify MAC */ 841 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) 842 { 843 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN; 844 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN; 845 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN; 846 } 847 848 #ifdef KSSL_DEBUG 849 { 850 unsigned long i; 851 fprintf(stderr,"\trec->data="); 852 for (i=0; i<l; i++) 853 fprintf(stderr," %02x", rec->data[i]); fprintf(stderr,"\n"); 854 } 855 #endif /* KSSL_DEBUG */ 856 857 ret = 1; 858 if (EVP_MD_CTX_md(s->read_hash) != NULL) 859 mac_size = EVP_MD_CTX_size(s->read_hash); 860 if ((bs != 1) && !send) 861 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size); 862 if (pad && !send) 863 rec->length -= pad; 864 } 865 return ret; 866 } 867 868 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out) 869 { 870 unsigned int ret; 871 EVP_MD_CTX ctx, *d=NULL; 872 int i; 873 874 if (s->s3->handshake_buffer) 875 if (!ssl3_digest_cached_records(s)) 876 return 0; 877 878 for (i=0;i<SSL_MAX_DIGEST;i++) 879 { 880 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid) 881 { 882 d=s->s3->handshake_dgst[i]; 883 break; 884 } 885 } 886 if (!d) { 887 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST); 888 return 0; 889 } 890 891 EVP_MD_CTX_init(&ctx); 892 EVP_MD_CTX_copy_ex(&ctx,d); 893 EVP_DigestFinal_ex(&ctx,out,&ret); 894 EVP_MD_CTX_cleanup(&ctx); 895 return((int)ret); 896 } 897 898 int tls1_final_finish_mac(SSL *s, 899 const char *str, int slen, unsigned char *out) 900 { 901 unsigned int i; 902 EVP_MD_CTX ctx; 903 unsigned char buf[2*EVP_MAX_MD_SIZE]; 904 unsigned char *q,buf2[12]; 905 int idx; 906 long mask; 907 int err=0; 908 const EVP_MD *md; 909 910 q=buf; 911 912 if (s->s3->handshake_buffer) 913 if (!ssl3_digest_cached_records(s)) 914 return 0; 915 916 EVP_MD_CTX_init(&ctx); 917 918 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++) 919 { 920 if (mask & ssl_get_algorithm2(s)) 921 { 922 int hashsize = EVP_MD_size(md); 923 EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx]; 924 if (!hdgst || hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf))) 925 { 926 /* internal error: 'buf' is too small for this cipersuite! */ 927 err = 1; 928 } 929 else 930 { 931 if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) || 932 !EVP_DigestFinal_ex(&ctx,q,&i) || 933 (i != (unsigned int)hashsize)) 934 err = 1; 935 q+=hashsize; 936 } 937 } 938 } 939 940 if (!tls1_PRF(ssl_get_algorithm2(s), 941 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0, 942 s->session->master_key,s->session->master_key_length, 943 out,buf2,sizeof buf2)) 944 err = 1; 945 EVP_MD_CTX_cleanup(&ctx); 946 947 if (err) 948 return 0; 949 else 950 return sizeof buf2; 951 } 952 953 int tls1_mac(SSL *ssl, unsigned char *md, int send) 954 { 955 SSL3_RECORD *rec; 956 unsigned char *seq; 957 EVP_MD_CTX *hash; 958 size_t md_size, orig_len; 959 int i; 960 EVP_MD_CTX hmac, *mac_ctx; 961 unsigned char header[13]; 962 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM)); 963 int t; 964 965 if (send) 966 { 967 rec= &(ssl->s3->wrec); 968 seq= &(ssl->s3->write_sequence[0]); 969 hash=ssl->write_hash; 970 } 971 else 972 { 973 rec= &(ssl->s3->rrec); 974 seq= &(ssl->s3->read_sequence[0]); 975 hash=ssl->read_hash; 976 } 977 978 t=EVP_MD_CTX_size(hash); 979 OPENSSL_assert(t >= 0); 980 md_size=t; 981 982 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ 983 if (stream_mac) 984 { 985 mac_ctx = hash; 986 } 987 else 988 { 989 if (!EVP_MD_CTX_copy(&hmac,hash)) 990 return -1; 991 mac_ctx = &hmac; 992 } 993 994 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) 995 { 996 unsigned char dtlsseq[8],*p=dtlsseq; 997 998 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); 999 memcpy (p,&seq[2],6); 1000 1001 memcpy(header, dtlsseq, 8); 1002 } 1003 else 1004 memcpy(header, seq, 8); 1005 1006 /* kludge: tls1_cbc_remove_padding passes padding length in rec->type */ 1007 orig_len = rec->length+md_size+((unsigned int)rec->type>>8); 1008 rec->type &= 0xff; 1009 1010 header[8]=rec->type; 1011 header[9]=(unsigned char)(ssl->version>>8); 1012 header[10]=(unsigned char)(ssl->version); 1013 header[11]=(rec->length)>>8; 1014 header[12]=(rec->length)&0xff; 1015 1016 if (!send && 1017 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE && 1018 ssl3_cbc_record_digest_supported(mac_ctx)) 1019 { 1020 /* This is a CBC-encrypted record. We must avoid leaking any 1021 * timing-side channel information about how many blocks of 1022 * data we are hashing because that gives an attacker a 1023 * timing-oracle. */ 1024 ssl3_cbc_digest_record( 1025 mac_ctx, 1026 md, &md_size, 1027 header, rec->input, 1028 rec->length + md_size, orig_len, 1029 ssl->s3->read_mac_secret, 1030 ssl->s3->read_mac_secret_size, 1031 0 /* not SSLv3 */); 1032 } 1033 else 1034 { 1035 EVP_DigestSignUpdate(mac_ctx,header,sizeof(header)); 1036 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length); 1037 t=EVP_DigestSignFinal(mac_ctx,md,&md_size); 1038 OPENSSL_assert(t > 0); 1039 #ifdef OPENSSL_FIPS 1040 if (!send && FIPS_mode()) 1041 tls_fips_digest_extra( 1042 ssl->enc_read_ctx, 1043 mac_ctx, rec->input, 1044 rec->length, orig_len); 1045 #endif 1046 } 1047 1048 if (!stream_mac) 1049 EVP_MD_CTX_cleanup(&hmac); 1050 #ifdef TLS_DEBUG 1051 fprintf(stderr,"seq="); 1052 {int z; for (z=0; z<8; z++) fprintf(stderr,"%02X ",seq[z]); fprintf(stderr,"\n"); } 1053 fprintf(stderr,"rec="); 1054 {unsigned int z; for (z=0; z<rec->length; z++) fprintf(stderr,"%02X ",rec->data[z]); fprintf(stderr,"\n"); } 1055 #endif 1056 1057 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) 1058 { 1059 for (i=7; i>=0; i--) 1060 { 1061 ++seq[i]; 1062 if (seq[i] != 0) break; 1063 } 1064 } 1065 1066 #ifdef TLS_DEBUG 1067 {unsigned int z; for (z=0; z<md_size; z++) fprintf(stderr,"%02X ",md[z]); fprintf(stderr,"\n"); } 1068 #endif 1069 return(md_size); 1070 } 1071 1072 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, 1073 int len) 1074 { 1075 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; 1076 const void *co = NULL, *so = NULL; 1077 int col = 0, sol = 0; 1078 1079 1080 #ifdef KSSL_DEBUG 1081 fprintf(stderr,"tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len); 1082 #endif /* KSSL_DEBUG */ 1083 1084 #ifdef TLSEXT_TYPE_opaque_prf_input 1085 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL && 1086 s->s3->client_opaque_prf_input_len > 0 && 1087 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len) 1088 { 1089 co = s->s3->client_opaque_prf_input; 1090 col = s->s3->server_opaque_prf_input_len; 1091 so = s->s3->server_opaque_prf_input; 1092 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) */ 1093 } 1094 #endif 1095 1096 tls1_PRF(ssl_get_algorithm2(s), 1097 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE, 1098 s->s3->client_random,SSL3_RANDOM_SIZE, 1099 co, col, 1100 s->s3->server_random,SSL3_RANDOM_SIZE, 1101 so, sol, 1102 p,len, 1103 s->session->master_key,buff,sizeof buff); 1104 #ifdef SSL_DEBUG 1105 fprintf(stderr, "Premaster Secret:\n"); 1106 BIO_dump_fp(stderr, (char *)p, len); 1107 fprintf(stderr, "Client Random:\n"); 1108 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE); 1109 fprintf(stderr, "Server Random:\n"); 1110 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE); 1111 fprintf(stderr, "Master Secret:\n"); 1112 BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE); 1113 #endif 1114 1115 #ifdef KSSL_DEBUG 1116 fprintf(stderr,"tls1_generate_master_secret() complete\n"); 1117 #endif /* KSSL_DEBUG */ 1118 return(SSL3_MASTER_SECRET_SIZE); 1119 } 1120 1121 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1122 const char *label, size_t llen, const unsigned char *context, 1123 size_t contextlen, int use_context) 1124 { 1125 unsigned char *buff; 1126 unsigned char *val = NULL; 1127 size_t vallen, currentvalpos; 1128 int rv; 1129 1130 #ifdef KSSL_DEBUG 1131 fprintf(stderr,"tls1_export_keying_material(%p,%p,%lu,%s,%lu,%p,%lu)\n", s, out, olen, label, llen, context, contextlen); 1132 #endif /* KSSL_DEBUG */ 1133 1134 buff = OPENSSL_malloc(olen); 1135 if (buff == NULL) goto err2; 1136 1137 /* construct PRF arguments 1138 * we construct the PRF argument ourself rather than passing separate 1139 * values into the TLS PRF to ensure that the concatenation of values 1140 * does not create a prohibited label. 1141 */ 1142 vallen = llen + SSL3_RANDOM_SIZE * 2; 1143 if (use_context) 1144 { 1145 vallen += 2 + contextlen; 1146 } 1147 1148 val = OPENSSL_malloc(vallen); 1149 if (val == NULL) goto err2; 1150 currentvalpos = 0; 1151 memcpy(val + currentvalpos, (unsigned char *) label, llen); 1152 currentvalpos += llen; 1153 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE); 1154 currentvalpos += SSL3_RANDOM_SIZE; 1155 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE); 1156 currentvalpos += SSL3_RANDOM_SIZE; 1157 1158 if (use_context) 1159 { 1160 val[currentvalpos] = (contextlen >> 8) & 0xff; 1161 currentvalpos++; 1162 val[currentvalpos] = contextlen & 0xff; 1163 currentvalpos++; 1164 if ((contextlen > 0) || (context != NULL)) 1165 { 1166 memcpy(val + currentvalpos, context, contextlen); 1167 } 1168 } 1169 1170 /* disallow prohibited labels 1171 * note that SSL3_RANDOM_SIZE > max(prohibited label len) = 1172 * 15, so size of val > max(prohibited label len) = 15 and the 1173 * comparisons won't have buffer overflow 1174 */ 1175 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST, 1176 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1; 1177 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST, 1178 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1; 1179 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST, 1180 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1; 1181 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST, 1182 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1; 1183 1184 rv = tls1_PRF(ssl_get_algorithm2(s), 1185 val, vallen, 1186 NULL, 0, 1187 NULL, 0, 1188 NULL, 0, 1189 NULL, 0, 1190 s->session->master_key,s->session->master_key_length, 1191 out,buff,olen); 1192 1193 #ifdef KSSL_DEBUG 1194 fprintf(stderr,"tls1_export_keying_material() complete\n"); 1195 #endif /* KSSL_DEBUG */ 1196 goto ret; 1197 err1: 1198 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL); 1199 rv = 0; 1200 goto ret; 1201 err2: 1202 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE); 1203 rv = 0; 1204 ret: 1205 if (buff != NULL) OPENSSL_free(buff); 1206 if (val != NULL) OPENSSL_free(val); 1207 return(rv); 1208 } 1209 1210 int tls1_alert_code(int code) 1211 { 1212 switch (code) 1213 { 1214 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); 1215 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); 1216 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); 1217 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); 1218 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); 1219 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); 1220 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); 1221 case SSL_AD_NO_CERTIFICATE: return(-1); 1222 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); 1223 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); 1224 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); 1225 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); 1226 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); 1227 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); 1228 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); 1229 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); 1230 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); 1231 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); 1232 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); 1233 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); 1234 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); 1235 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); 1236 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); 1237 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); 1238 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION); 1239 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE); 1240 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME); 1241 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE); 1242 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE); 1243 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY); 1244 case SSL_AD_INAPPROPRIATE_FALLBACK:return(TLS1_AD_INAPPROPRIATE_FALLBACK); 1245 #if 0 /* not appropriate for TLS, not used for DTLS */ 1246 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return 1247 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 1248 #endif 1249 default: return(-1); 1250 } 1251 } 1252