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", key_block[i]); printf("\n"); 365 } 366 #endif /* KSSL_DEBUG */ 367 368 if (which & SSL3_CC_READ) 369 { 370 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) 371 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM; 372 else 373 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM; 374 375 if (s->enc_read_ctx != NULL) 376 reuse_dd = 1; 377 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) 378 goto err; 379 else 380 /* make sure it's intialized in case we exit later with an error */ 381 EVP_CIPHER_CTX_init(s->enc_read_ctx); 382 dd= s->enc_read_ctx; 383 mac_ctx=ssl_replace_hash(&s->read_hash,NULL); 384 #ifndef OPENSSL_NO_COMP 385 if (s->expand != NULL) 386 { 387 COMP_CTX_free(s->expand); 388 s->expand=NULL; 389 } 390 if (comp != NULL) 391 { 392 s->expand=COMP_CTX_new(comp->method); 393 if (s->expand == NULL) 394 { 395 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 396 goto err2; 397 } 398 if (s->s3->rrec.comp == NULL) 399 s->s3->rrec.comp=(unsigned char *) 400 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); 401 if (s->s3->rrec.comp == NULL) 402 goto err; 403 } 404 #endif 405 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ 406 if (s->version != DTLS1_VERSION) 407 memset(&(s->s3->read_sequence[0]),0,8); 408 mac_secret= &(s->s3->read_mac_secret[0]); 409 mac_secret_size=&(s->s3->read_mac_secret_size); 410 } 411 else 412 { 413 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) 414 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM; 415 else 416 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM; 417 if (s->enc_write_ctx != NULL) 418 reuse_dd = 1; 419 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) 420 goto err; 421 else 422 /* make sure it's intialized in case we exit later with an error */ 423 EVP_CIPHER_CTX_init(s->enc_write_ctx); 424 dd= s->enc_write_ctx; 425 mac_ctx = ssl_replace_hash(&s->write_hash,NULL); 426 #ifndef OPENSSL_NO_COMP 427 if (s->compress != NULL) 428 { 429 COMP_CTX_free(s->compress); 430 s->compress=NULL; 431 } 432 if (comp != NULL) 433 { 434 s->compress=COMP_CTX_new(comp->method); 435 if (s->compress == NULL) 436 { 437 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 438 goto err2; 439 } 440 } 441 #endif 442 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ 443 if (s->version != DTLS1_VERSION) 444 memset(&(s->s3->write_sequence[0]),0,8); 445 mac_secret= &(s->s3->write_mac_secret[0]); 446 mac_secret_size = &(s->s3->write_mac_secret_size); 447 } 448 449 if (reuse_dd) 450 EVP_CIPHER_CTX_cleanup(dd); 451 452 p=s->s3->tmp.key_block; 453 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size; 454 455 cl=EVP_CIPHER_key_length(c); 456 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? 457 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; 458 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ 459 /* If GCM mode only part of IV comes from PRF */ 460 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) 461 k = EVP_GCM_TLS_FIXED_IV_LEN; 462 else 463 k=EVP_CIPHER_iv_length(c); 464 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || 465 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) 466 { 467 ms= &(p[ 0]); n=i+i; 468 key= &(p[ n]); n+=j+j; 469 iv= &(p[ n]); n+=k+k; 470 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; 471 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; 472 client_write=1; 473 } 474 else 475 { 476 n=i; 477 ms= &(p[ n]); n+=i+j; 478 key= &(p[ n]); n+=j+k; 479 iv= &(p[ n]); n+=k; 480 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; 481 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; 482 client_write=0; 483 } 484 485 if (n > s->s3->tmp.key_block_length) 486 { 487 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); 488 goto err2; 489 } 490 491 memcpy(mac_secret,ms,i); 492 493 if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER)) 494 { 495 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, 496 mac_secret,*mac_secret_size); 497 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key); 498 EVP_PKEY_free(mac_key); 499 } 500 #ifdef TLS_DEBUG 501 printf("which = %04X\nmac key=",which); 502 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } 503 #endif 504 if (is_export) 505 { 506 /* In here I set both the read and write key/iv to the 507 * same value since only the correct one will be used :-). 508 */ 509 if (!tls1_PRF(ssl_get_algorithm2(s), 510 exp_label,exp_label_len, 511 s->s3->client_random,SSL3_RANDOM_SIZE, 512 s->s3->server_random,SSL3_RANDOM_SIZE, 513 NULL,0,NULL,0, 514 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c))) 515 goto err2; 516 key=tmp1; 517 518 if (k > 0) 519 { 520 if (!tls1_PRF(ssl_get_algorithm2(s), 521 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE, 522 s->s3->client_random,SSL3_RANDOM_SIZE, 523 s->s3->server_random,SSL3_RANDOM_SIZE, 524 NULL,0,NULL,0, 525 empty,0,iv1,iv2,k*2)) 526 goto err2; 527 if (client_write) 528 iv=iv1; 529 else 530 iv= &(iv1[k]); 531 } 532 } 533 534 s->session->key_arg_length=0; 535 #ifdef KSSL_DEBUG 536 { 537 int i; 538 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); 539 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]); 540 printf("\n"); 541 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]); 542 printf("\n"); 543 } 544 #endif /* KSSL_DEBUG */ 545 546 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) 547 { 548 EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE)); 549 EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv); 550 } 551 else 552 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); 553 554 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */ 555 if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size) 556 EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY, 557 *mac_secret_size,mac_secret); 558 559 #ifdef TLS_DEBUG 560 printf("which = %04X\nkey=",which); 561 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } 562 printf("\niv="); 563 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } 564 printf("\n"); 565 #endif 566 567 OPENSSL_cleanse(tmp1,sizeof(tmp1)); 568 OPENSSL_cleanse(tmp2,sizeof(tmp1)); 569 OPENSSL_cleanse(iv1,sizeof(iv1)); 570 OPENSSL_cleanse(iv2,sizeof(iv2)); 571 return(1); 572 err: 573 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); 574 err2: 575 return(0); 576 } 577 578 int tls1_setup_key_block(SSL *s) 579 { 580 unsigned char *p1,*p2=NULL; 581 const EVP_CIPHER *c; 582 const EVP_MD *hash; 583 int num; 584 SSL_COMP *comp; 585 int mac_type= NID_undef,mac_secret_size=0; 586 int ret=0; 587 588 #ifdef KSSL_DEBUG 589 printf ("tls1_setup_key_block()\n"); 590 #endif /* KSSL_DEBUG */ 591 592 if (s->s3->tmp.key_block_length != 0) 593 return(1); 594 595 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp)) 596 { 597 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); 598 return(0); 599 } 600 601 s->s3->tmp.new_sym_enc=c; 602 s->s3->tmp.new_hash=hash; 603 s->s3->tmp.new_mac_pkey_type = mac_type; 604 s->s3->tmp.new_mac_secret_size = mac_secret_size; 605 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c); 606 num*=2; 607 608 ssl3_cleanup_key_block(s); 609 610 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) 611 { 612 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 613 goto err; 614 } 615 616 s->s3->tmp.key_block_length=num; 617 s->s3->tmp.key_block=p1; 618 619 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) 620 { 621 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 622 goto err; 623 } 624 625 #ifdef TLS_DEBUG 626 printf("client random\n"); 627 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } 628 printf("server random\n"); 629 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } 630 printf("pre-master\n"); 631 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } 632 #endif 633 if (!tls1_generate_key_block(s,p1,p2,num)) 634 goto err; 635 #ifdef TLS_DEBUG 636 printf("\nkey block\n"); 637 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } 638 #endif 639 640 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS) 641 && s->method->version <= TLS1_VERSION) 642 { 643 /* enable vulnerability countermeasure for CBC ciphers with 644 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt) 645 */ 646 s->s3->need_empty_fragments = 1; 647 648 if (s->session->cipher != NULL) 649 { 650 if (s->session->cipher->algorithm_enc == SSL_eNULL) 651 s->s3->need_empty_fragments = 0; 652 653 #ifndef OPENSSL_NO_RC4 654 if (s->session->cipher->algorithm_enc == SSL_RC4) 655 s->s3->need_empty_fragments = 0; 656 #endif 657 } 658 } 659 660 ret = 1; 661 err: 662 if (p2) 663 { 664 OPENSSL_cleanse(p2,num); 665 OPENSSL_free(p2); 666 } 667 return(ret); 668 } 669 670 int tls1_enc(SSL *s, int send) 671 { 672 SSL3_RECORD *rec; 673 EVP_CIPHER_CTX *ds; 674 unsigned long l; 675 int bs,i,ii,j,k,pad=0; 676 const EVP_CIPHER *enc; 677 678 if (send) 679 { 680 if (EVP_MD_CTX_md(s->write_hash)) 681 { 682 int n=EVP_MD_CTX_size(s->write_hash); 683 OPENSSL_assert(n >= 0); 684 } 685 ds=s->enc_write_ctx; 686 rec= &(s->s3->wrec); 687 if (s->enc_write_ctx == NULL) 688 enc=NULL; 689 else 690 { 691 int ivlen; 692 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); 693 /* For TLSv1.1 and later explicit IV */ 694 if (s->version >= TLS1_1_VERSION 695 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE) 696 ivlen = EVP_CIPHER_iv_length(enc); 697 else 698 ivlen = 0; 699 if (ivlen > 1) 700 { 701 if ( rec->data != rec->input) 702 /* we can't write into the input stream: 703 * Can this ever happen?? (steve) 704 */ 705 fprintf(stderr, 706 "%s:%d: rec->data != rec->input\n", 707 __FILE__, __LINE__); 708 else if (RAND_bytes(rec->input, ivlen) <= 0) 709 return -1; 710 } 711 } 712 } 713 else 714 { 715 if (EVP_MD_CTX_md(s->read_hash)) 716 { 717 int n=EVP_MD_CTX_size(s->read_hash); 718 OPENSSL_assert(n >= 0); 719 } 720 ds=s->enc_read_ctx; 721 rec= &(s->s3->rrec); 722 if (s->enc_read_ctx == NULL) 723 enc=NULL; 724 else 725 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); 726 } 727 728 #ifdef KSSL_DEBUG 729 printf("tls1_enc(%d)\n", send); 730 #endif /* KSSL_DEBUG */ 731 732 if ((s->session == NULL) || (ds == NULL) || 733 (enc == NULL)) 734 { 735 memmove(rec->data,rec->input,rec->length); 736 rec->input=rec->data; 737 } 738 else 739 { 740 l=rec->length; 741 bs=EVP_CIPHER_block_size(ds->cipher); 742 743 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER) 744 { 745 unsigned char buf[13],*seq; 746 747 seq = send?s->s3->write_sequence:s->s3->read_sequence; 748 749 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) 750 { 751 unsigned char dtlsseq[9],*p=dtlsseq; 752 753 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p); 754 memcpy(p,&seq[2],6); 755 memcpy(buf,dtlsseq,8); 756 } 757 else 758 { 759 memcpy(buf,seq,8); 760 for (i=7; i>=0; i--) /* increment */ 761 { 762 ++seq[i]; 763 if (seq[i] != 0) break; 764 } 765 } 766 767 buf[8]=rec->type; 768 buf[9]=(unsigned char)(s->version>>8); 769 buf[10]=(unsigned char)(s->version); 770 buf[11]=rec->length>>8; 771 buf[12]=rec->length&0xff; 772 pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf); 773 if (send) 774 { 775 l+=pad; 776 rec->length+=pad; 777 } 778 } 779 else if ((bs != 1) && send) 780 { 781 i=bs-((int)l%bs); 782 783 /* Add weird padding of upto 256 bytes */ 784 785 /* we need to add 'i' padding bytes of value j */ 786 j=i-1; 787 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) 788 { 789 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 790 j++; 791 } 792 for (k=(int)l; k<(int)(l+i); k++) 793 rec->input[k]=j; 794 l+=i; 795 rec->length+=i; 796 } 797 798 #ifdef KSSL_DEBUG 799 { 800 unsigned long ui; 801 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", 802 ds,rec->data,rec->input,l); 803 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n", 804 ds->buf_len, ds->cipher->key_len, 805 DES_KEY_SZ, DES_SCHEDULE_SZ, 806 ds->cipher->iv_len); 807 printf("\t\tIV: "); 808 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); 809 printf("\n"); 810 printf("\trec->input="); 811 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); 812 printf("\n"); 813 } 814 #endif /* KSSL_DEBUG */ 815 816 if (!send) 817 { 818 if (l == 0 || l%bs != 0) 819 { 820 if (s->version >= TLS1_1_VERSION) 821 return -1; 822 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); 823 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); 824 return 0; 825 } 826 } 827 828 i = EVP_Cipher(ds,rec->data,rec->input,l); 829 if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER) 830 ?(i<0) 831 :(i==0)) 832 return -1; /* AEAD can fail to verify MAC */ 833 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) 834 { 835 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN; 836 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN; 837 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN; 838 } 839 840 #ifdef KSSL_DEBUG 841 { 842 unsigned long i; 843 printf("\trec->data="); 844 for (i=0; i<l; i++) 845 printf(" %02x", rec->data[i]); printf("\n"); 846 } 847 #endif /* KSSL_DEBUG */ 848 849 if ((bs != 1) && !send) 850 { 851 ii=i=rec->data[l-1]; /* padding_length */ 852 i++; 853 /* NB: if compression is in operation the first packet 854 * may not be of even length so the padding bug check 855 * cannot be performed. This bug workaround has been 856 * around since SSLeay so hopefully it is either fixed 857 * now or no buggy implementation supports compression 858 * [steve] 859 */ 860 if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) 861 && !s->expand) 862 { 863 /* First packet is even in size, so check */ 864 if ((memcmp(s->s3->read_sequence, 865 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) 866 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; 867 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 868 i--; 869 } 870 /* TLS 1.0 does not bound the number of padding bytes by the block size. 871 * All of them must have value 'padding_length'. */ 872 if (i > (int)rec->length) 873 { 874 /* Incorrect padding. SSLerr() and ssl3_alert are done 875 * by caller: we don't want to reveal whether this is 876 * a decryption error or a MAC verification failure 877 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */ 878 return -1; 879 } 880 for (j=(int)(l-i); j<(int)l; j++) 881 { 882 if (rec->data[j] != ii) 883 { 884 /* Incorrect padding */ 885 return -1; 886 } 887 } 888 rec->length -=i; 889 if (s->version >= TLS1_1_VERSION 890 && EVP_CIPHER_CTX_mode(ds) == EVP_CIPH_CBC_MODE) 891 { 892 if (bs > (int)rec->length) 893 return -1; 894 rec->data += bs; /* skip the explicit IV */ 895 rec->input += bs; 896 rec->length -= bs; 897 } 898 } 899 if (pad && !send) 900 rec->length -= pad; 901 } 902 return(1); 903 } 904 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out) 905 { 906 unsigned int ret; 907 EVP_MD_CTX ctx, *d=NULL; 908 int i; 909 910 if (s->s3->handshake_buffer) 911 if (!ssl3_digest_cached_records(s)) 912 return 0; 913 914 for (i=0;i<SSL_MAX_DIGEST;i++) 915 { 916 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid) 917 { 918 d=s->s3->handshake_dgst[i]; 919 break; 920 } 921 } 922 if (!d) { 923 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST); 924 return 0; 925 } 926 927 EVP_MD_CTX_init(&ctx); 928 EVP_MD_CTX_copy_ex(&ctx,d); 929 EVP_DigestFinal_ex(&ctx,out,&ret); 930 EVP_MD_CTX_cleanup(&ctx); 931 return((int)ret); 932 } 933 934 int tls1_final_finish_mac(SSL *s, 935 const char *str, int slen, unsigned char *out) 936 { 937 unsigned int i; 938 EVP_MD_CTX ctx; 939 unsigned char buf[2*EVP_MAX_MD_SIZE]; 940 unsigned char *q,buf2[12]; 941 int idx; 942 long mask; 943 int err=0; 944 const EVP_MD *md; 945 946 q=buf; 947 948 if (s->s3->handshake_buffer) 949 if (!ssl3_digest_cached_records(s)) 950 return 0; 951 952 EVP_MD_CTX_init(&ctx); 953 954 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++) 955 { 956 if (mask & ssl_get_algorithm2(s)) 957 { 958 int hashsize = EVP_MD_size(md); 959 if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf))) 960 { 961 /* internal error: 'buf' is too small for this cipersuite! */ 962 err = 1; 963 } 964 else 965 { 966 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]); 967 EVP_DigestFinal_ex(&ctx,q,&i); 968 if (i != (unsigned int)hashsize) /* can't really happen */ 969 err = 1; 970 q+=i; 971 } 972 } 973 } 974 975 if (!tls1_PRF(ssl_get_algorithm2(s), 976 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0, 977 s->session->master_key,s->session->master_key_length, 978 out,buf2,sizeof buf2)) 979 err = 1; 980 EVP_MD_CTX_cleanup(&ctx); 981 982 if (err) 983 return 0; 984 else 985 return sizeof buf2; 986 } 987 988 int tls1_mac(SSL *ssl, unsigned char *md, int send) 989 { 990 SSL3_RECORD *rec; 991 unsigned char *seq; 992 EVP_MD_CTX *hash; 993 size_t md_size; 994 int i; 995 EVP_MD_CTX hmac, *mac_ctx; 996 unsigned char buf[5]; 997 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM)); 998 int t; 999 1000 if (send) 1001 { 1002 rec= &(ssl->s3->wrec); 1003 seq= &(ssl->s3->write_sequence[0]); 1004 hash=ssl->write_hash; 1005 } 1006 else 1007 { 1008 rec= &(ssl->s3->rrec); 1009 seq= &(ssl->s3->read_sequence[0]); 1010 hash=ssl->read_hash; 1011 } 1012 1013 t=EVP_MD_CTX_size(hash); 1014 OPENSSL_assert(t >= 0); 1015 md_size=t; 1016 1017 buf[0]=rec->type; 1018 buf[1]=(unsigned char)(ssl->version>>8); 1019 buf[2]=(unsigned char)(ssl->version); 1020 buf[3]=rec->length>>8; 1021 buf[4]=rec->length&0xff; 1022 1023 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ 1024 if (stream_mac) 1025 { 1026 mac_ctx = hash; 1027 } 1028 else 1029 { 1030 EVP_MD_CTX_copy(&hmac,hash); 1031 mac_ctx = &hmac; 1032 } 1033 1034 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) 1035 { 1036 unsigned char dtlsseq[8],*p=dtlsseq; 1037 1038 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); 1039 memcpy (p,&seq[2],6); 1040 1041 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8); 1042 } 1043 else 1044 EVP_DigestSignUpdate(mac_ctx,seq,8); 1045 1046 EVP_DigestSignUpdate(mac_ctx,buf,5); 1047 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length); 1048 t=EVP_DigestSignFinal(mac_ctx,md,&md_size); 1049 OPENSSL_assert(t > 0); 1050 1051 if (!stream_mac) EVP_MD_CTX_cleanup(&hmac); 1052 #ifdef TLS_DEBUG 1053 printf("sec="); 1054 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } 1055 printf("seq="); 1056 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } 1057 printf("buf="); 1058 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } 1059 printf("rec="); 1060 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } 1061 #endif 1062 1063 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) 1064 { 1065 for (i=7; i>=0; i--) 1066 { 1067 ++seq[i]; 1068 if (seq[i] != 0) break; 1069 } 1070 } 1071 1072 #ifdef TLS_DEBUG 1073 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } 1074 #endif 1075 return(md_size); 1076 } 1077 1078 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, 1079 int len) 1080 { 1081 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; 1082 const void *co = NULL, *so = NULL; 1083 int col = 0, sol = 0; 1084 1085 1086 #ifdef KSSL_DEBUG 1087 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len); 1088 #endif /* KSSL_DEBUG */ 1089 1090 #ifdef TLSEXT_TYPE_opaque_prf_input 1091 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL && 1092 s->s3->client_opaque_prf_input_len > 0 && 1093 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len) 1094 { 1095 co = s->s3->client_opaque_prf_input; 1096 col = s->s3->server_opaque_prf_input_len; 1097 so = s->s3->server_opaque_prf_input; 1098 sol = s->s3->client_opaque_prf_input_len; /* must be same as col (see draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1) */ 1099 } 1100 #endif 1101 1102 tls1_PRF(ssl_get_algorithm2(s), 1103 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE, 1104 s->s3->client_random,SSL3_RANDOM_SIZE, 1105 co, col, 1106 s->s3->server_random,SSL3_RANDOM_SIZE, 1107 so, sol, 1108 p,len, 1109 s->session->master_key,buff,sizeof buff); 1110 #ifdef SSL_DEBUG 1111 fprintf(stderr, "Premaster Secret:\n"); 1112 BIO_dump_fp(stderr, (char *)p, len); 1113 fprintf(stderr, "Client Random:\n"); 1114 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE); 1115 fprintf(stderr, "Server Random:\n"); 1116 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE); 1117 fprintf(stderr, "Master Secret:\n"); 1118 BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE); 1119 #endif 1120 1121 #ifdef KSSL_DEBUG 1122 printf ("tls1_generate_master_secret() complete\n"); 1123 #endif /* KSSL_DEBUG */ 1124 return(SSL3_MASTER_SECRET_SIZE); 1125 } 1126 1127 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen, 1128 const char *label, size_t llen, const unsigned char *context, 1129 size_t contextlen, int use_context) 1130 { 1131 unsigned char *buff; 1132 unsigned char *val = NULL; 1133 size_t vallen, currentvalpos; 1134 int rv; 1135 1136 #ifdef KSSL_DEBUG 1137 printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, p, plen); 1138 #endif /* KSSL_DEBUG */ 1139 1140 buff = OPENSSL_malloc(olen); 1141 if (buff == NULL) goto err2; 1142 1143 /* construct PRF arguments 1144 * we construct the PRF argument ourself rather than passing separate 1145 * values into the TLS PRF to ensure that the concatenation of values 1146 * does not create a prohibited label. 1147 */ 1148 vallen = llen + SSL3_RANDOM_SIZE * 2; 1149 if (use_context) 1150 { 1151 vallen += 2 + contextlen; 1152 } 1153 1154 val = OPENSSL_malloc(vallen); 1155 if (val == NULL) goto err2; 1156 currentvalpos = 0; 1157 memcpy(val + currentvalpos, (unsigned char *) label, llen); 1158 currentvalpos += llen; 1159 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE); 1160 currentvalpos += SSL3_RANDOM_SIZE; 1161 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE); 1162 currentvalpos += SSL3_RANDOM_SIZE; 1163 1164 if (use_context) 1165 { 1166 val[currentvalpos] = (contextlen >> 8) & 0xff; 1167 currentvalpos++; 1168 val[currentvalpos] = contextlen & 0xff; 1169 currentvalpos++; 1170 if ((contextlen > 0) || (context != NULL)) 1171 { 1172 memcpy(val + currentvalpos, context, contextlen); 1173 } 1174 } 1175 1176 /* disallow prohibited labels 1177 * note that SSL3_RANDOM_SIZE > max(prohibited label len) = 1178 * 15, so size of val > max(prohibited label len) = 15 and the 1179 * comparisons won't have buffer overflow 1180 */ 1181 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST, 1182 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1; 1183 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST, 1184 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1; 1185 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST, 1186 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1; 1187 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST, 1188 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1; 1189 1190 rv = tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 1191 val, vallen, 1192 NULL, 0, 1193 NULL, 0, 1194 NULL, 0, 1195 NULL, 0, 1196 s->session->master_key,s->session->master_key_length, 1197 out,buff,olen); 1198 1199 #ifdef KSSL_DEBUG 1200 printf ("tls1_export_keying_material() complete\n"); 1201 #endif /* KSSL_DEBUG */ 1202 goto ret; 1203 err1: 1204 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL); 1205 rv = 0; 1206 goto ret; 1207 err2: 1208 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE); 1209 rv = 0; 1210 ret: 1211 if (buff != NULL) OPENSSL_free(buff); 1212 if (val != NULL) OPENSSL_free(val); 1213 return(rv); 1214 } 1215 1216 int tls1_alert_code(int code) 1217 { 1218 switch (code) 1219 { 1220 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); 1221 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); 1222 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); 1223 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); 1224 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); 1225 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); 1226 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); 1227 case SSL_AD_NO_CERTIFICATE: return(-1); 1228 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); 1229 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); 1230 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); 1231 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); 1232 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); 1233 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); 1234 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); 1235 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); 1236 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); 1237 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); 1238 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); 1239 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); 1240 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); 1241 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); 1242 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); 1243 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); 1244 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION); 1245 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE); 1246 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME); 1247 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE); 1248 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE); 1249 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY); 1250 #if 0 /* not appropriate for TLS, not used for DTLS */ 1251 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return 1252 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 1253 #endif 1254 default: return(-1); 1255 } 1256 } 1257
