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 #ifdef KSSL_DEBUG 147 #include <openssl/des.h> 148 #endif 149 150 /* seed1 through seed5 are virtually concatenated */ 151 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec, 152 int sec_len, 153 const void *seed1, int seed1_len, 154 const void *seed2, int seed2_len, 155 const void *seed3, int seed3_len, 156 const void *seed4, int seed4_len, 157 const void *seed5, int seed5_len, 158 unsigned char *out, int olen) 159 { 160 int chunk,n; 161 unsigned int j; 162 HMAC_CTX ctx; 163 HMAC_CTX ctx_tmp; 164 unsigned char A1[EVP_MAX_MD_SIZE]; 165 unsigned int A1_len; 166 int ret = 0; 167 168 chunk=EVP_MD_size(md); 169 OPENSSL_assert(chunk >= 0); 170 171 HMAC_CTX_init(&ctx); 172 HMAC_CTX_init(&ctx_tmp); 173 if (!HMAC_Init_ex(&ctx,sec,sec_len,md, NULL)) 174 goto err; 175 if (!HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL)) 176 goto err; 177 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len)) 178 goto err; 179 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len)) 180 goto err; 181 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len)) 182 goto err; 183 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len)) 184 goto err; 185 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len)) 186 goto err; 187 if (!HMAC_Final(&ctx,A1,&A1_len)) 188 goto err; 189 190 n=0; 191 for (;;) 192 { 193 if (!HMAC_Init_ex(&ctx,NULL,0,NULL,NULL)) /* re-init */ 194 goto err; 195 if (!HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL)) /* re-init */ 196 goto err; 197 if (!HMAC_Update(&ctx,A1,A1_len)) 198 goto err; 199 if (!HMAC_Update(&ctx_tmp,A1,A1_len)) 200 goto err; 201 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len)) 202 goto err; 203 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len)) 204 goto err; 205 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len)) 206 goto err; 207 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len)) 208 goto err; 209 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len)) 210 goto err; 211 212 if (olen > chunk) 213 { 214 if (!HMAC_Final(&ctx,out,&j)) 215 goto err; 216 out+=j; 217 olen-=j; 218 if (!HMAC_Final(&ctx_tmp,A1,&A1_len)) /* calc the next A1 value */ 219 goto err; 220 } 221 else /* last one */ 222 { 223 if (!HMAC_Final(&ctx,A1,&A1_len)) 224 goto err; 225 memcpy(out,A1,olen); 226 break; 227 } 228 } 229 ret = 1; 230 err: 231 HMAC_CTX_cleanup(&ctx); 232 HMAC_CTX_cleanup(&ctx_tmp); 233 OPENSSL_cleanse(A1,sizeof(A1)); 234 return ret; 235 } 236 237 /* seed1 through seed5 are virtually concatenated */ 238 static int tls1_PRF(long digest_mask, 239 const void *seed1, int seed1_len, 240 const void *seed2, int seed2_len, 241 const void *seed3, int seed3_len, 242 const void *seed4, int seed4_len, 243 const void *seed5, int seed5_len, 244 const unsigned char *sec, int slen, 245 unsigned char *out1, 246 unsigned char *out2, int olen) 247 { 248 int len,i,idx,count; 249 const unsigned char *S1; 250 long m; 251 const EVP_MD *md; 252 int ret = 0; 253 254 /* Count number of digests and partition sec evenly */ 255 count=0; 256 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) { 257 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++; 258 } 259 len=slen/count; 260 S1=sec; 261 memset(out1,0,olen); 262 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) { 263 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) { 264 if (!md) { 265 SSLerr(SSL_F_TLS1_PRF, 266 SSL_R_UNSUPPORTED_DIGEST_TYPE); 267 goto err; 268 } 269 if (!tls1_P_hash(md ,S1,len+(slen&1), 270 seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len, 271 out2,olen)) 272 goto err; 273 S1+=len; 274 for (i=0; i<olen; i++) 275 { 276 out1[i]^=out2[i]; 277 } 278 } 279 } 280 ret = 1; 281 err: 282 return ret; 283 } 284 static int tls1_generate_key_block(SSL *s, unsigned char *km, 285 unsigned char *tmp, int num) 286 { 287 int ret; 288 ret = tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 289 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE, 290 s->s3->server_random,SSL3_RANDOM_SIZE, 291 s->s3->client_random,SSL3_RANDOM_SIZE, 292 NULL,0,NULL,0, 293 s->session->master_key,s->session->master_key_length, 294 km,tmp,num); 295 #ifdef KSSL_DEBUG 296 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t", 297 s->session->master_key_length); 298 { 299 int i; 300 for (i=0; i < s->session->master_key_length; i++) 301 { 302 printf("%02X", s->session->master_key[i]); 303 } 304 printf("\n"); } 305 #endif /* KSSL_DEBUG */ 306 return ret; 307 } 308 309 int tls1_change_cipher_state(SSL *s, int which) 310 { 311 static const unsigned char empty[]=""; 312 unsigned char *p,*key_block,*mac_secret; 313 unsigned char *exp_label; 314 unsigned char tmp1[EVP_MAX_KEY_LENGTH]; 315 unsigned char tmp2[EVP_MAX_KEY_LENGTH]; 316 unsigned char iv1[EVP_MAX_IV_LENGTH*2]; 317 unsigned char iv2[EVP_MAX_IV_LENGTH*2]; 318 unsigned char *ms,*key,*iv,*er1,*er2; 319 int client_write; 320 EVP_CIPHER_CTX *dd; 321 const EVP_CIPHER *c; 322 #ifndef OPENSSL_NO_COMP 323 const SSL_COMP *comp; 324 #endif 325 const EVP_MD *m; 326 int mac_type; 327 int *mac_secret_size; 328 EVP_MD_CTX *mac_ctx; 329 EVP_PKEY *mac_key; 330 int is_export,n,i,j,k,exp_label_len,cl; 331 int reuse_dd = 0; 332 333 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); 334 c=s->s3->tmp.new_sym_enc; 335 m=s->s3->tmp.new_hash; 336 mac_type = s->s3->tmp.new_mac_pkey_type; 337 #ifndef OPENSSL_NO_COMP 338 comp=s->s3->tmp.new_compression; 339 #endif 340 key_block=s->s3->tmp.key_block; 341 342 #ifdef KSSL_DEBUG 343 printf("tls1_change_cipher_state(which= %d) w/\n", which); 344 printf("\talg= %ld/%ld, comp= %p\n", 345 s->s3->tmp.new_cipher->algorithm_mkey, 346 s->s3->tmp.new_cipher->algorithm_auth, 347 comp); 348 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c); 349 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n", 350 c->nid,c->block_size,c->key_len,c->iv_len); 351 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length); 352 { 353 int i; 354 for (i=0; i<s->s3->tmp.key_block_length; i++) 355 printf("%02x", key_block[i]); printf("\n"); 356 } 357 #endif /* KSSL_DEBUG */ 358 359 if (which & SSL3_CC_READ) 360 { 361 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) 362 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM; 363 else 364 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM; 365 366 if (s->enc_read_ctx != NULL) 367 reuse_dd = 1; 368 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) 369 goto err; 370 else 371 /* make sure it's intialized in case we exit later with an error */ 372 EVP_CIPHER_CTX_init(s->enc_read_ctx); 373 dd= s->enc_read_ctx; 374 mac_ctx=ssl_replace_hash(&s->read_hash,NULL); 375 #ifndef OPENSSL_NO_COMP 376 if (s->expand != NULL) 377 { 378 COMP_CTX_free(s->expand); 379 s->expand=NULL; 380 } 381 if (comp != NULL) 382 { 383 s->expand=COMP_CTX_new(comp->method); 384 if (s->expand == NULL) 385 { 386 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 387 goto err2; 388 } 389 if (s->s3->rrec.comp == NULL) 390 s->s3->rrec.comp=(unsigned char *) 391 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); 392 if (s->s3->rrec.comp == NULL) 393 goto err; 394 } 395 #endif 396 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ 397 if (s->version != DTLS1_VERSION) 398 memset(&(s->s3->read_sequence[0]),0,8); 399 mac_secret= &(s->s3->read_mac_secret[0]); 400 mac_secret_size=&(s->s3->read_mac_secret_size); 401 } 402 else 403 { 404 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) 405 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM; 406 else 407 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM; 408 if (s->enc_write_ctx != NULL) 409 reuse_dd = 1; 410 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) 411 goto err; 412 else 413 /* make sure it's intialized in case we exit later with an error */ 414 EVP_CIPHER_CTX_init(s->enc_write_ctx); 415 dd= s->enc_write_ctx; 416 mac_ctx = ssl_replace_hash(&s->write_hash,NULL); 417 #ifndef OPENSSL_NO_COMP 418 if (s->compress != NULL) 419 { 420 COMP_CTX_free(s->compress); 421 s->compress=NULL; 422 } 423 if (comp != NULL) 424 { 425 s->compress=COMP_CTX_new(comp->method); 426 if (s->compress == NULL) 427 { 428 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 429 goto err2; 430 } 431 } 432 #endif 433 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ 434 if (s->version != DTLS1_VERSION) 435 memset(&(s->s3->write_sequence[0]),0,8); 436 mac_secret= &(s->s3->write_mac_secret[0]); 437 mac_secret_size = &(s->s3->write_mac_secret_size); 438 } 439 440 if (reuse_dd) 441 EVP_CIPHER_CTX_cleanup(dd); 442 443 p=s->s3->tmp.key_block; 444 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size; 445 446 cl=EVP_CIPHER_key_length(c); 447 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? 448 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; 449 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ 450 k=EVP_CIPHER_iv_length(c); 451 er1= &(s->s3->client_random[0]); 452 er2= &(s->s3->server_random[0]); 453 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || 454 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) 455 { 456 ms= &(p[ 0]); n=i+i; 457 key= &(p[ n]); n+=j+j; 458 iv= &(p[ n]); n+=k+k; 459 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; 460 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; 461 client_write=1; 462 } 463 else 464 { 465 n=i; 466 ms= &(p[ n]); n+=i+j; 467 key= &(p[ n]); n+=j+k; 468 iv= &(p[ n]); n+=k; 469 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; 470 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; 471 client_write=0; 472 } 473 474 if (n > s->s3->tmp.key_block_length) 475 { 476 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); 477 goto err2; 478 } 479 480 memcpy(mac_secret,ms,i); 481 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, 482 mac_secret,*mac_secret_size); 483 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key); 484 EVP_PKEY_free(mac_key); 485 #ifdef TLS_DEBUG 486 printf("which = %04X\nmac key=",which); 487 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } 488 #endif 489 if (is_export) 490 { 491 /* In here I set both the read and write key/iv to the 492 * same value since only the correct one will be used :-). 493 */ 494 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 495 exp_label,exp_label_len, 496 s->s3->client_random,SSL3_RANDOM_SIZE, 497 s->s3->server_random,SSL3_RANDOM_SIZE, 498 NULL,0,NULL,0, 499 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c))) 500 goto err2; 501 key=tmp1; 502 503 if (k > 0) 504 { 505 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 506 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE, 507 s->s3->client_random,SSL3_RANDOM_SIZE, 508 s->s3->server_random,SSL3_RANDOM_SIZE, 509 NULL,0,NULL,0, 510 empty,0,iv1,iv2,k*2)) 511 goto err2; 512 if (client_write) 513 iv=iv1; 514 else 515 iv= &(iv1[k]); 516 } 517 } 518 519 s->session->key_arg_length=0; 520 #ifdef KSSL_DEBUG 521 { 522 int i; 523 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); 524 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]); 525 printf("\n"); 526 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]); 527 printf("\n"); 528 } 529 #endif /* KSSL_DEBUG */ 530 531 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); 532 #ifdef TLS_DEBUG 533 printf("which = %04X\nkey=",which); 534 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } 535 printf("\niv="); 536 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } 537 printf("\n"); 538 #endif 539 540 OPENSSL_cleanse(tmp1,sizeof(tmp1)); 541 OPENSSL_cleanse(tmp2,sizeof(tmp1)); 542 OPENSSL_cleanse(iv1,sizeof(iv1)); 543 OPENSSL_cleanse(iv2,sizeof(iv2)); 544 return(1); 545 err: 546 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); 547 err2: 548 return(0); 549 } 550 551 int tls1_setup_key_block(SSL *s) 552 { 553 unsigned char *p1,*p2=NULL; 554 const EVP_CIPHER *c; 555 const EVP_MD *hash; 556 int num; 557 SSL_COMP *comp; 558 int mac_type= NID_undef,mac_secret_size=0; 559 int ret=0; 560 561 #ifdef KSSL_DEBUG 562 printf ("tls1_setup_key_block()\n"); 563 #endif /* KSSL_DEBUG */ 564 565 if (s->s3->tmp.key_block_length != 0) 566 return(1); 567 568 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp)) 569 { 570 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); 571 return(0); 572 } 573 574 s->s3->tmp.new_sym_enc=c; 575 s->s3->tmp.new_hash=hash; 576 s->s3->tmp.new_mac_pkey_type = mac_type; 577 s->s3->tmp.new_mac_secret_size = mac_secret_size; 578 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c); 579 num*=2; 580 581 ssl3_cleanup_key_block(s); 582 583 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) 584 { 585 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 586 goto err; 587 } 588 589 s->s3->tmp.key_block_length=num; 590 s->s3->tmp.key_block=p1; 591 592 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) 593 { 594 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 595 goto err; 596 } 597 598 #ifdef TLS_DEBUG 599 printf("client random\n"); 600 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } 601 printf("server random\n"); 602 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } 603 printf("pre-master\n"); 604 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } 605 #endif 606 if (!tls1_generate_key_block(s,p1,p2,num)) 607 goto err; 608 #ifdef TLS_DEBUG 609 printf("\nkey block\n"); 610 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } 611 #endif 612 613 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 614 { 615 /* enable vulnerability countermeasure for CBC ciphers with 616 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt) 617 */ 618 s->s3->need_empty_fragments = 1; 619 620 if (s->session->cipher != NULL) 621 { 622 if (s->session->cipher->algorithm_enc == SSL_eNULL) 623 s->s3->need_empty_fragments = 0; 624 625 #ifndef OPENSSL_NO_RC4 626 if (s->session->cipher->algorithm_enc == SSL_RC4) 627 s->s3->need_empty_fragments = 0; 628 #endif 629 } 630 } 631 632 ret = 1; 633 err: 634 if (p2) 635 { 636 OPENSSL_cleanse(p2,num); 637 OPENSSL_free(p2); 638 } 639 return(ret); 640 } 641 642 int tls1_enc(SSL *s, int send) 643 { 644 SSL3_RECORD *rec; 645 EVP_CIPHER_CTX *ds; 646 unsigned long l; 647 int bs,i,ii,j,k,n=0; 648 const EVP_CIPHER *enc; 649 650 if (send) 651 { 652 if (EVP_MD_CTX_md(s->write_hash)) 653 { 654 n=EVP_MD_CTX_size(s->write_hash); 655 OPENSSL_assert(n >= 0); 656 } 657 ds=s->enc_write_ctx; 658 rec= &(s->s3->wrec); 659 if (s->enc_write_ctx == NULL) 660 enc=NULL; 661 else 662 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); 663 } 664 else 665 { 666 if (EVP_MD_CTX_md(s->read_hash)) 667 { 668 n=EVP_MD_CTX_size(s->read_hash); 669 OPENSSL_assert(n >= 0); 670 } 671 ds=s->enc_read_ctx; 672 rec= &(s->s3->rrec); 673 if (s->enc_read_ctx == NULL) 674 enc=NULL; 675 else 676 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); 677 } 678 679 #ifdef KSSL_DEBUG 680 printf("tls1_enc(%d)\n", send); 681 #endif /* KSSL_DEBUG */ 682 683 if ((s->session == NULL) || (ds == NULL) || 684 (enc == NULL)) 685 { 686 memmove(rec->data,rec->input,rec->length); 687 rec->input=rec->data; 688 } 689 else 690 { 691 l=rec->length; 692 bs=EVP_CIPHER_block_size(ds->cipher); 693 694 if ((bs != 1) && send) 695 { 696 i=bs-((int)l%bs); 697 698 /* Add weird padding of upto 256 bytes */ 699 700 /* we need to add 'i' padding bytes of value j */ 701 j=i-1; 702 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) 703 { 704 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 705 j++; 706 } 707 for (k=(int)l; k<(int)(l+i); k++) 708 rec->input[k]=j; 709 l+=i; 710 rec->length+=i; 711 } 712 713 #ifdef KSSL_DEBUG 714 { 715 unsigned long ui; 716 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", 717 ds,rec->data,rec->input,l); 718 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n", 719 ds->buf_len, ds->cipher->key_len, 720 DES_KEY_SZ, DES_SCHEDULE_SZ, 721 ds->cipher->iv_len); 722 printf("\t\tIV: "); 723 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); 724 printf("\n"); 725 printf("\trec->input="); 726 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); 727 printf("\n"); 728 } 729 #endif /* KSSL_DEBUG */ 730 731 if (!send) 732 { 733 if (l == 0 || l%bs != 0) 734 { 735 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); 736 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); 737 return 0; 738 } 739 } 740 741 EVP_Cipher(ds,rec->data,rec->input,l); 742 743 #ifdef KSSL_DEBUG 744 { 745 unsigned long i; 746 printf("\trec->data="); 747 for (i=0; i<l; i++) 748 printf(" %02x", rec->data[i]); printf("\n"); 749 } 750 #endif /* KSSL_DEBUG */ 751 752 if ((bs != 1) && !send) 753 { 754 ii=i=rec->data[l-1]; /* padding_length */ 755 i++; 756 /* NB: if compression is in operation the first packet 757 * may not be of even length so the padding bug check 758 * cannot be performed. This bug workaround has been 759 * around since SSLeay so hopefully it is either fixed 760 * now or no buggy implementation supports compression 761 * [steve] 762 */ 763 if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) 764 && !s->expand) 765 { 766 /* First packet is even in size, so check */ 767 if ((memcmp(s->s3->read_sequence, 768 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) 769 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; 770 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 771 i--; 772 } 773 /* TLS 1.0 does not bound the number of padding bytes by the block size. 774 * All of them must have value 'padding_length'. */ 775 if (i > (int)rec->length) 776 { 777 /* Incorrect padding. SSLerr() and ssl3_alert are done 778 * by caller: we don't want to reveal whether this is 779 * a decryption error or a MAC verification failure 780 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */ 781 return -1; 782 } 783 for (j=(int)(l-i); j<(int)l; j++) 784 { 785 if (rec->data[j] != ii) 786 { 787 /* Incorrect padding */ 788 return -1; 789 } 790 } 791 rec->length-=i; 792 } 793 } 794 return(1); 795 } 796 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out) 797 { 798 unsigned int ret; 799 EVP_MD_CTX ctx, *d=NULL; 800 int i; 801 802 if (s->s3->handshake_buffer) 803 if (!ssl3_digest_cached_records(s)) 804 return 0; 805 806 for (i=0;i<SSL_MAX_DIGEST;i++) 807 { 808 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid) 809 { 810 d=s->s3->handshake_dgst[i]; 811 break; 812 } 813 } 814 if (!d) { 815 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST); 816 return 0; 817 } 818 819 EVP_MD_CTX_init(&ctx); 820 EVP_MD_CTX_copy_ex(&ctx,d); 821 EVP_DigestFinal_ex(&ctx,out,&ret); 822 EVP_MD_CTX_cleanup(&ctx); 823 return((int)ret); 824 } 825 826 int tls1_final_finish_mac(SSL *s, 827 const char *str, int slen, unsigned char *out) 828 { 829 unsigned int i; 830 EVP_MD_CTX ctx; 831 unsigned char buf[2*EVP_MAX_MD_SIZE]; 832 unsigned char *q,buf2[12]; 833 int idx; 834 long mask; 835 int err=0; 836 const EVP_MD *md; 837 838 q=buf; 839 840 if (s->s3->handshake_buffer) 841 if (!ssl3_digest_cached_records(s)) 842 return 0; 843 844 EVP_MD_CTX_init(&ctx); 845 846 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++) 847 { 848 if (mask & s->s3->tmp.new_cipher->algorithm2) 849 { 850 int hashsize = EVP_MD_size(md); 851 if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf))) 852 { 853 /* internal error: 'buf' is too small for this cipersuite! */ 854 err = 1; 855 } 856 else 857 { 858 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]); 859 EVP_DigestFinal_ex(&ctx,q,&i); 860 if (i != (unsigned int)hashsize) /* can't really happen */ 861 err = 1; 862 q+=i; 863 } 864 } 865 } 866 867 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 868 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0, 869 s->session->master_key,s->session->master_key_length, 870 out,buf2,sizeof buf2)) 871 err = 1; 872 EVP_MD_CTX_cleanup(&ctx); 873 874 if (err) 875 return 0; 876 else 877 return sizeof buf2; 878 } 879 880 int tls1_mac(SSL *ssl, unsigned char *md, int send) 881 { 882 SSL3_RECORD *rec; 883 unsigned char *mac_sec,*seq; 884 EVP_MD_CTX *hash; 885 size_t md_size; 886 int i; 887 EVP_MD_CTX hmac, *mac_ctx; 888 unsigned char buf[5]; 889 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM)); 890 int t; 891 892 if (send) 893 { 894 rec= &(ssl->s3->wrec); 895 mac_sec= &(ssl->s3->write_mac_secret[0]); 896 seq= &(ssl->s3->write_sequence[0]); 897 hash=ssl->write_hash; 898 } 899 else 900 { 901 rec= &(ssl->s3->rrec); 902 mac_sec= &(ssl->s3->read_mac_secret[0]); 903 seq= &(ssl->s3->read_sequence[0]); 904 hash=ssl->read_hash; 905 } 906 907 t=EVP_MD_CTX_size(hash); 908 OPENSSL_assert(t >= 0); 909 md_size=t; 910 911 buf[0]=rec->type; 912 buf[1]=(unsigned char)(ssl->version>>8); 913 buf[2]=(unsigned char)(ssl->version); 914 buf[3]=rec->length>>8; 915 buf[4]=rec->length&0xff; 916 917 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ 918 if (stream_mac) 919 { 920 mac_ctx = hash; 921 } 922 else 923 { 924 EVP_MD_CTX_copy(&hmac,hash); 925 mac_ctx = &hmac; 926 } 927 928 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) 929 { 930 unsigned char dtlsseq[8],*p=dtlsseq; 931 932 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); 933 memcpy (p,&seq[2],6); 934 935 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8); 936 } 937 else 938 EVP_DigestSignUpdate(mac_ctx,seq,8); 939 940 EVP_DigestSignUpdate(mac_ctx,buf,5); 941 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length); 942 t=EVP_DigestSignFinal(mac_ctx,md,&md_size); 943 OPENSSL_assert(t > 0); 944 945 if (!stream_mac) EVP_MD_CTX_cleanup(&hmac); 946 #ifdef TLS_DEBUG 947 printf("sec="); 948 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } 949 printf("seq="); 950 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } 951 printf("buf="); 952 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } 953 printf("rec="); 954 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } 955 #endif 956 957 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) 958 { 959 for (i=7; i>=0; i--) 960 { 961 ++seq[i]; 962 if (seq[i] != 0) break; 963 } 964 } 965 966 #ifdef TLS_DEBUG 967 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } 968 #endif 969 return(md_size); 970 } 971 972 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, 973 int len) 974 { 975 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; 976 const void *co = NULL, *so = NULL; 977 int col = 0, sol = 0; 978 979 #ifdef KSSL_DEBUG 980 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len); 981 #endif /* KSSL_DEBUG */ 982 983 #ifdef TLSEXT_TYPE_opaque_prf_input 984 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL && 985 s->s3->client_opaque_prf_input_len > 0 && 986 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len) 987 { 988 co = s->s3->client_opaque_prf_input; 989 col = s->s3->server_opaque_prf_input_len; 990 so = s->s3->server_opaque_prf_input; 991 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) */ 992 } 993 #endif 994 995 tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 996 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE, 997 s->s3->client_random,SSL3_RANDOM_SIZE, 998 co, col, 999 s->s3->server_random,SSL3_RANDOM_SIZE, 1000 so, sol, 1001 p,len, 1002 s->session->master_key,buff,sizeof buff); 1003 1004 #ifdef KSSL_DEBUG 1005 printf ("tls1_generate_master_secret() complete\n"); 1006 #endif /* KSSL_DEBUG */ 1007 return(SSL3_MASTER_SECRET_SIZE); 1008 } 1009 1010 int tls1_alert_code(int code) 1011 { 1012 switch (code) 1013 { 1014 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); 1015 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); 1016 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); 1017 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); 1018 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); 1019 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); 1020 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); 1021 case SSL_AD_NO_CERTIFICATE: return(-1); 1022 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); 1023 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); 1024 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); 1025 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); 1026 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); 1027 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); 1028 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); 1029 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); 1030 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); 1031 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); 1032 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); 1033 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); 1034 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); 1035 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); 1036 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); 1037 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); 1038 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION); 1039 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE); 1040 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME); 1041 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE); 1042 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE); 1043 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY); 1044 #if 0 /* not appropriate for TLS, not used for DTLS */ 1045 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return 1046 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 1047 #endif 1048 default: return(-1); 1049 } 1050 } 1051 1052
