t1_enc.c revision 43c12e3d4f9bbbbd4a8ba7b149686437514bc6b6
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#ifdef KSSL_DEBUG 147#include <openssl/des.h> 148#endif 149 150/* seed1 through seed5 are virtually concatenated */ 151static 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; 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 for (;;) 191 { 192 if (!HMAC_Init_ex(&ctx,NULL,0,NULL,NULL)) /* re-init */ 193 goto err; 194 if (!HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL)) /* re-init */ 195 goto err; 196 if (!HMAC_Update(&ctx,A1,A1_len)) 197 goto err; 198 if (!HMAC_Update(&ctx_tmp,A1,A1_len)) 199 goto err; 200 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len)) 201 goto err; 202 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len)) 203 goto err; 204 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len)) 205 goto err; 206 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len)) 207 goto err; 208 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len)) 209 goto err; 210 211 if (olen > chunk) 212 { 213 if (!HMAC_Final(&ctx,out,&j)) 214 goto err; 215 out+=j; 216 olen-=j; 217 if (!HMAC_Final(&ctx_tmp,A1,&A1_len)) /* calc the next A1 value */ 218 goto err; 219 } 220 else /* last one */ 221 { 222 if (!HMAC_Final(&ctx,A1,&A1_len)) 223 goto err; 224 memcpy(out,A1,olen); 225 break; 226 } 227 } 228 ret = 1; 229err: 230 HMAC_CTX_cleanup(&ctx); 231 HMAC_CTX_cleanup(&ctx_tmp); 232 OPENSSL_cleanse(A1,sizeof(A1)); 233 return ret; 234 } 235 236/* seed1 through seed5 are virtually concatenated */ 237static int tls1_PRF(long digest_mask, 238 const void *seed1, int seed1_len, 239 const void *seed2, int seed2_len, 240 const void *seed3, int seed3_len, 241 const void *seed4, int seed4_len, 242 const void *seed5, int seed5_len, 243 const unsigned char *sec, int slen, 244 unsigned char *out1, 245 unsigned char *out2, int olen) 246 { 247 int len,i,idx,count; 248 const unsigned char *S1; 249 long m; 250 const EVP_MD *md; 251 int ret = 0; 252 253 /* Count number of digests and partition sec evenly */ 254 count=0; 255 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) { 256 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++; 257 } 258 len=slen/count; 259 S1=sec; 260 memset(out1,0,olen); 261 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) { 262 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) { 263 if (!md) { 264 SSLerr(SSL_F_TLS1_PRF, 265 SSL_R_UNSUPPORTED_DIGEST_TYPE); 266 goto err; 267 } 268 if (!tls1_P_hash(md ,S1,len+(slen&1), 269 seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len, 270 out2,olen)) 271 goto err; 272 S1+=len; 273 for (i=0; i<olen; i++) 274 { 275 out1[i]^=out2[i]; 276 } 277 } 278 } 279 ret = 1; 280err: 281 return ret; 282} 283static int tls1_generate_key_block(SSL *s, unsigned char *km, 284 unsigned char *tmp, int num) 285 { 286 int ret; 287 ret = tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 288 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE, 289 s->s3->server_random,SSL3_RANDOM_SIZE, 290 s->s3->client_random,SSL3_RANDOM_SIZE, 291 NULL,0,NULL,0, 292 s->session->master_key,s->session->master_key_length, 293 km,tmp,num); 294#ifdef KSSL_DEBUG 295 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t", 296 s->session->master_key_length); 297 { 298 int i; 299 for (i=0; i < s->session->master_key_length; i++) 300 { 301 printf("%02X", s->session->master_key[i]); 302 } 303 printf("\n"); } 304#endif /* KSSL_DEBUG */ 305 return ret; 306 } 307 308int tls1_change_cipher_state(SSL *s, int which) 309 { 310 static const unsigned char empty[]=""; 311 unsigned char *p,*mac_secret; 312 unsigned char *exp_label; 313 unsigned char tmp1[EVP_MAX_KEY_LENGTH]; 314 unsigned char tmp2[EVP_MAX_KEY_LENGTH]; 315 unsigned char iv1[EVP_MAX_IV_LENGTH*2]; 316 unsigned char iv2[EVP_MAX_IV_LENGTH*2]; 317 unsigned char *ms,*key,*iv; 318 int client_write; 319 EVP_CIPHER_CTX *dd; 320 const EVP_CIPHER *c; 321#ifndef OPENSSL_NO_COMP 322 const SSL_COMP *comp; 323#endif 324 const EVP_MD *m; 325 int mac_type; 326 int *mac_secret_size; 327 EVP_MD_CTX *mac_ctx; 328 EVP_PKEY *mac_key; 329 int is_export,n,i,j,k,exp_label_len,cl; 330 int reuse_dd = 0; 331 332 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); 333 c=s->s3->tmp.new_sym_enc; 334 m=s->s3->tmp.new_hash; 335 mac_type = s->s3->tmp.new_mac_pkey_type; 336#ifndef OPENSSL_NO_COMP 337 comp=s->s3->tmp.new_compression; 338#endif 339 340#ifdef KSSL_DEBUG 341 printf("tls1_change_cipher_state(which= %d) w/\n", which); 342 printf("\talg= %ld/%ld, comp= %p\n", 343 s->s3->tmp.new_cipher->algorithm_mkey, 344 s->s3->tmp.new_cipher->algorithm_auth, 345 comp); 346 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c); 347 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n", 348 c->nid,c->block_size,c->key_len,c->iv_len); 349 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length); 350 { 351 int i; 352 for (i=0; i<s->s3->tmp.key_block_length; i++) 353 printf("%02x", key_block[i]); printf("\n"); 354 } 355#endif /* KSSL_DEBUG */ 356 357 if (which & SSL3_CC_READ) 358 { 359 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) 360 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM; 361 else 362 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM; 363 364 if (s->enc_read_ctx != NULL) 365 reuse_dd = 1; 366 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) 367 goto err; 368 else 369 /* make sure it's intialized in case we exit later with an error */ 370 EVP_CIPHER_CTX_init(s->enc_read_ctx); 371 dd= s->enc_read_ctx; 372 mac_ctx=ssl_replace_hash(&s->read_hash,NULL); 373#ifndef OPENSSL_NO_COMP 374 if (s->expand != NULL) 375 { 376 COMP_CTX_free(s->expand); 377 s->expand=NULL; 378 } 379 if (comp != NULL) 380 { 381 s->expand=COMP_CTX_new(comp->method); 382 if (s->expand == NULL) 383 { 384 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 385 goto err2; 386 } 387 if (s->s3->rrec.comp == NULL) 388 s->s3->rrec.comp=(unsigned char *) 389 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); 390 if (s->s3->rrec.comp == NULL) 391 goto err; 392 } 393#endif 394 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ 395 if (s->version != DTLS1_VERSION) 396 memset(&(s->s3->read_sequence[0]),0,8); 397 mac_secret= &(s->s3->read_mac_secret[0]); 398 mac_secret_size=&(s->s3->read_mac_secret_size); 399 } 400 else 401 { 402 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC) 403 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM; 404 else 405 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM; 406 if (s->enc_write_ctx != NULL) 407 reuse_dd = 1; 408 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL) 409 goto err; 410 else 411 /* make sure it's intialized in case we exit later with an error */ 412 EVP_CIPHER_CTX_init(s->enc_write_ctx); 413 dd= s->enc_write_ctx; 414 mac_ctx = ssl_replace_hash(&s->write_hash,NULL); 415#ifndef OPENSSL_NO_COMP 416 if (s->compress != NULL) 417 { 418 COMP_CTX_free(s->compress); 419 s->compress=NULL; 420 } 421 if (comp != NULL) 422 { 423 s->compress=COMP_CTX_new(comp->method); 424 if (s->compress == NULL) 425 { 426 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 427 goto err2; 428 } 429 } 430#endif 431 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */ 432 if (s->version != DTLS1_VERSION) 433 memset(&(s->s3->write_sequence[0]),0,8); 434 mac_secret= &(s->s3->write_mac_secret[0]); 435 mac_secret_size = &(s->s3->write_mac_secret_size); 436 } 437 438 if (reuse_dd) 439 EVP_CIPHER_CTX_cleanup(dd); 440 441 p=s->s3->tmp.key_block; 442 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size; 443 444 cl=EVP_CIPHER_key_length(c); 445 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? 446 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; 447 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ 448 k=EVP_CIPHER_iv_length(c); 449 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || 450 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) 451 { 452 ms= &(p[ 0]); n=i+i; 453 key= &(p[ n]); n+=j+j; 454 iv= &(p[ n]); n+=k+k; 455 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; 456 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; 457 client_write=1; 458 } 459 else 460 { 461 n=i; 462 ms= &(p[ n]); n+=i+j; 463 key= &(p[ n]); n+=j+k; 464 iv= &(p[ n]); n+=k; 465 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; 466 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; 467 client_write=0; 468 } 469 470 if (n > s->s3->tmp.key_block_length) 471 { 472 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR); 473 goto err2; 474 } 475 476 memcpy(mac_secret,ms,i); 477 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, 478 mac_secret,*mac_secret_size); 479 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key); 480 EVP_PKEY_free(mac_key); 481#ifdef TLS_DEBUG 482printf("which = %04X\nmac key=",which); 483{ int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } 484#endif 485 if (is_export) 486 { 487 /* In here I set both the read and write key/iv to the 488 * same value since only the correct one will be used :-). 489 */ 490 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 491 exp_label,exp_label_len, 492 s->s3->client_random,SSL3_RANDOM_SIZE, 493 s->s3->server_random,SSL3_RANDOM_SIZE, 494 NULL,0,NULL,0, 495 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c))) 496 goto err2; 497 key=tmp1; 498 499 if (k > 0) 500 { 501 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 502 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE, 503 s->s3->client_random,SSL3_RANDOM_SIZE, 504 s->s3->server_random,SSL3_RANDOM_SIZE, 505 NULL,0,NULL,0, 506 empty,0,iv1,iv2,k*2)) 507 goto err2; 508 if (client_write) 509 iv=iv1; 510 else 511 iv= &(iv1[k]); 512 } 513 } 514 515 s->session->key_arg_length=0; 516#ifdef KSSL_DEBUG 517 { 518 int i; 519 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n"); 520 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]); 521 printf("\n"); 522 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]); 523 printf("\n"); 524 } 525#endif /* KSSL_DEBUG */ 526 527 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); 528#ifdef TLS_DEBUG 529printf("which = %04X\nkey=",which); 530{ int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } 531printf("\niv="); 532{ int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } 533printf("\n"); 534#endif 535 536 OPENSSL_cleanse(tmp1,sizeof(tmp1)); 537 OPENSSL_cleanse(tmp2,sizeof(tmp1)); 538 OPENSSL_cleanse(iv1,sizeof(iv1)); 539 OPENSSL_cleanse(iv2,sizeof(iv2)); 540 return(1); 541err: 542 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); 543err2: 544 return(0); 545 } 546 547int tls1_setup_key_block(SSL *s) 548 { 549 unsigned char *p1,*p2=NULL; 550 const EVP_CIPHER *c; 551 const EVP_MD *hash; 552 int num; 553 SSL_COMP *comp; 554 int mac_type= NID_undef,mac_secret_size=0; 555 int ret=0; 556 557#ifdef KSSL_DEBUG 558 printf ("tls1_setup_key_block()\n"); 559#endif /* KSSL_DEBUG */ 560 561 if (s->s3->tmp.key_block_length != 0) 562 return(1); 563 564 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp)) 565 { 566 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); 567 return(0); 568 } 569 570 s->s3->tmp.new_sym_enc=c; 571 s->s3->tmp.new_hash=hash; 572 s->s3->tmp.new_mac_pkey_type = mac_type; 573 s->s3->tmp.new_mac_secret_size = mac_secret_size; 574 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c); 575 num*=2; 576 577 ssl3_cleanup_key_block(s); 578 579 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) 580 { 581 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 582 goto err; 583 } 584 585 s->s3->tmp.key_block_length=num; 586 s->s3->tmp.key_block=p1; 587 588 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) 589 { 590 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 591 goto err; 592 } 593 594#ifdef TLS_DEBUG 595printf("client random\n"); 596{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } 597printf("server random\n"); 598{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } 599printf("pre-master\n"); 600{ int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } 601#endif 602 if (!tls1_generate_key_block(s,p1,p2,num)) 603 goto err; 604#ifdef TLS_DEBUG 605printf("\nkey block\n"); 606{ int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } 607#endif 608 609 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 610 { 611 /* enable vulnerability countermeasure for CBC ciphers with 612 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt) 613 */ 614 s->s3->need_empty_fragments = 1; 615 616 if (s->session->cipher != NULL) 617 { 618 if (s->session->cipher->algorithm_enc == SSL_eNULL) 619 s->s3->need_empty_fragments = 0; 620 621#ifndef OPENSSL_NO_RC4 622 if (s->session->cipher->algorithm_enc == SSL_RC4) 623 s->s3->need_empty_fragments = 0; 624#endif 625 } 626 } 627 628 ret = 1; 629err: 630 if (p2) 631 { 632 OPENSSL_cleanse(p2,num); 633 OPENSSL_free(p2); 634 } 635 return(ret); 636 } 637 638int tls1_enc(SSL *s, int send) 639 { 640 SSL3_RECORD *rec; 641 EVP_CIPHER_CTX *ds; 642 unsigned long l; 643 int bs,i,ii,j,k,n=0; 644 const EVP_CIPHER *enc; 645 646 if (send) 647 { 648 if (EVP_MD_CTX_md(s->write_hash)) 649 { 650 n=EVP_MD_CTX_size(s->write_hash); 651 OPENSSL_assert(n >= 0); 652 } 653 ds=s->enc_write_ctx; 654 rec= &(s->s3->wrec); 655 if (s->enc_write_ctx == NULL) 656 enc=NULL; 657 else 658 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); 659 } 660 else 661 { 662 if (EVP_MD_CTX_md(s->read_hash)) 663 { 664 n=EVP_MD_CTX_size(s->read_hash); 665 OPENSSL_assert(n >= 0); 666 } 667 ds=s->enc_read_ctx; 668 rec= &(s->s3->rrec); 669 if (s->enc_read_ctx == NULL) 670 enc=NULL; 671 else 672 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); 673 } 674 675#ifdef KSSL_DEBUG 676 printf("tls1_enc(%d)\n", send); 677#endif /* KSSL_DEBUG */ 678 679 if ((s->session == NULL) || (ds == NULL) || 680 (enc == NULL)) 681 { 682 memmove(rec->data,rec->input,rec->length); 683 rec->input=rec->data; 684 } 685 else 686 { 687 l=rec->length; 688 bs=EVP_CIPHER_block_size(ds->cipher); 689 690 if ((bs != 1) && send) 691 { 692 i=bs-((int)l%bs); 693 694 /* Add weird padding of upto 256 bytes */ 695 696 /* we need to add 'i' padding bytes of value j */ 697 j=i-1; 698 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) 699 { 700 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 701 j++; 702 } 703 for (k=(int)l; k<(int)(l+i); k++) 704 rec->input[k]=j; 705 l+=i; 706 rec->length+=i; 707 } 708 709#ifdef KSSL_DEBUG 710 { 711 unsigned long ui; 712 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n", 713 ds,rec->data,rec->input,l); 714 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n", 715 ds->buf_len, ds->cipher->key_len, 716 DES_KEY_SZ, DES_SCHEDULE_SZ, 717 ds->cipher->iv_len); 718 printf("\t\tIV: "); 719 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); 720 printf("\n"); 721 printf("\trec->input="); 722 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); 723 printf("\n"); 724 } 725#endif /* KSSL_DEBUG */ 726 727 if (!send) 728 { 729 if (l == 0 || l%bs != 0) 730 { 731 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); 732 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); 733 return 0; 734 } 735 } 736 737 EVP_Cipher(ds,rec->data,rec->input,l); 738 739#ifdef KSSL_DEBUG 740 { 741 unsigned long i; 742 printf("\trec->data="); 743 for (i=0; i<l; i++) 744 printf(" %02x", rec->data[i]); printf("\n"); 745 } 746#endif /* KSSL_DEBUG */ 747 748 if ((bs != 1) && !send) 749 { 750 ii=i=rec->data[l-1]; /* padding_length */ 751 i++; 752 /* NB: if compression is in operation the first packet 753 * may not be of even length so the padding bug check 754 * cannot be performed. This bug workaround has been 755 * around since SSLeay so hopefully it is either fixed 756 * now or no buggy implementation supports compression 757 * [steve] 758 */ 759 if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) 760 && !s->expand) 761 { 762 /* First packet is even in size, so check */ 763 if ((memcmp(s->s3->read_sequence, 764 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) 765 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; 766 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 767 i--; 768 } 769 /* TLS 1.0 does not bound the number of padding bytes by the block size. 770 * All of them must have value 'padding_length'. */ 771 if (i > (int)rec->length) 772 { 773 /* Incorrect padding. SSLerr() and ssl3_alert are done 774 * by caller: we don't want to reveal whether this is 775 * a decryption error or a MAC verification failure 776 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */ 777 return -1; 778 } 779 for (j=(int)(l-i); j<(int)l; j++) 780 { 781 if (rec->data[j] != ii) 782 { 783 /* Incorrect padding */ 784 return -1; 785 } 786 } 787 rec->length-=i; 788 } 789 } 790 return(1); 791 } 792int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out) 793 { 794 unsigned int ret; 795 EVP_MD_CTX ctx, *d=NULL; 796 int i; 797 798 if (s->s3->handshake_buffer) 799 if (!ssl3_digest_cached_records(s)) 800 return 0; 801 802 for (i=0;i<SSL_MAX_DIGEST;i++) 803 { 804 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid) 805 { 806 d=s->s3->handshake_dgst[i]; 807 break; 808 } 809 } 810 if (!d) { 811 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST); 812 return 0; 813 } 814 815 EVP_MD_CTX_init(&ctx); 816 EVP_MD_CTX_copy_ex(&ctx,d); 817 EVP_DigestFinal_ex(&ctx,out,&ret); 818 EVP_MD_CTX_cleanup(&ctx); 819 return((int)ret); 820 } 821 822int tls1_final_finish_mac(SSL *s, 823 const char *str, int slen, unsigned char *out) 824 { 825 unsigned int i; 826 EVP_MD_CTX ctx; 827 unsigned char buf[2*EVP_MAX_MD_SIZE]; 828 unsigned char *q,buf2[12]; 829 int idx; 830 long mask; 831 int err=0; 832 const EVP_MD *md; 833 834 q=buf; 835 836 if (s->s3->handshake_buffer) 837 if (!ssl3_digest_cached_records(s)) 838 return 0; 839 840 EVP_MD_CTX_init(&ctx); 841 842 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++) 843 { 844 if (mask & s->s3->tmp.new_cipher->algorithm2) 845 { 846 int hashsize = EVP_MD_size(md); 847 if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf))) 848 { 849 /* internal error: 'buf' is too small for this cipersuite! */ 850 err = 1; 851 } 852 else 853 { 854 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]); 855 EVP_DigestFinal_ex(&ctx,q,&i); 856 if (i != (unsigned int)hashsize) /* can't really happen */ 857 err = 1; 858 q+=i; 859 } 860 } 861 } 862 863 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 864 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0, 865 s->session->master_key,s->session->master_key_length, 866 out,buf2,sizeof buf2)) 867 err = 1; 868 EVP_MD_CTX_cleanup(&ctx); 869 870 if (err) 871 return 0; 872 else 873 return sizeof buf2; 874 } 875 876int tls1_mac(SSL *ssl, unsigned char *md, int send) 877 { 878 SSL3_RECORD *rec; 879 unsigned char *seq; 880 EVP_MD_CTX *hash; 881 size_t md_size; 882 int i; 883 EVP_MD_CTX hmac, *mac_ctx; 884 unsigned char buf[5]; 885 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM)); 886 int t; 887 888 if (send) 889 { 890 rec= &(ssl->s3->wrec); 891 seq= &(ssl->s3->write_sequence[0]); 892 hash=ssl->write_hash; 893 } 894 else 895 { 896 rec= &(ssl->s3->rrec); 897 seq= &(ssl->s3->read_sequence[0]); 898 hash=ssl->read_hash; 899 } 900 901 t=EVP_MD_CTX_size(hash); 902 OPENSSL_assert(t >= 0); 903 md_size=t; 904 905 buf[0]=rec->type; 906 buf[1]=(unsigned char)(ssl->version>>8); 907 buf[2]=(unsigned char)(ssl->version); 908 buf[3]=rec->length>>8; 909 buf[4]=rec->length&0xff; 910 911 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ 912 if (stream_mac) 913 { 914 mac_ctx = hash; 915 } 916 else 917 { 918 EVP_MD_CTX_copy(&hmac,hash); 919 mac_ctx = &hmac; 920 } 921 922 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER) 923 { 924 unsigned char dtlsseq[8],*p=dtlsseq; 925 926 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); 927 memcpy (p,&seq[2],6); 928 929 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8); 930 } 931 else 932 EVP_DigestSignUpdate(mac_ctx,seq,8); 933 934 EVP_DigestSignUpdate(mac_ctx,buf,5); 935 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length); 936 t=EVP_DigestSignFinal(mac_ctx,md,&md_size); 937 OPENSSL_assert(t > 0); 938 939 if (!stream_mac) EVP_MD_CTX_cleanup(&hmac); 940#ifdef TLS_DEBUG 941printf("sec="); 942{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } 943printf("seq="); 944{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } 945printf("buf="); 946{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } 947printf("rec="); 948{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } 949#endif 950 951 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER) 952 { 953 for (i=7; i>=0; i--) 954 { 955 ++seq[i]; 956 if (seq[i] != 0) break; 957 } 958 } 959 960#ifdef TLS_DEBUG 961{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } 962#endif 963 return(md_size); 964 } 965 966int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, 967 int len) 968 { 969 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; 970 const void *co = NULL, *so = NULL; 971 int col = 0, sol = 0; 972 973#ifdef KSSL_DEBUG 974 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len); 975#endif /* KSSL_DEBUG */ 976 977#ifdef TLSEXT_TYPE_opaque_prf_input 978 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL && 979 s->s3->client_opaque_prf_input_len > 0 && 980 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len) 981 { 982 co = s->s3->client_opaque_prf_input; 983 col = s->s3->server_opaque_prf_input_len; 984 so = s->s3->server_opaque_prf_input; 985 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) */ 986 } 987#endif 988 989 tls1_PRF(s->s3->tmp.new_cipher->algorithm2, 990 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE, 991 s->s3->client_random,SSL3_RANDOM_SIZE, 992 co, col, 993 s->s3->server_random,SSL3_RANDOM_SIZE, 994 so, sol, 995 p,len, 996 s->session->master_key,buff,sizeof buff); 997 998#ifdef KSSL_DEBUG 999 printf ("tls1_generate_master_secret() complete\n"); 1000#endif /* KSSL_DEBUG */ 1001 return(SSL3_MASTER_SECRET_SIZE); 1002 } 1003 1004int tls1_alert_code(int code) 1005 { 1006 switch (code) 1007 { 1008 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); 1009 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); 1010 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); 1011 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); 1012 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); 1013 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); 1014 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); 1015 case SSL_AD_NO_CERTIFICATE: return(-1); 1016 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); 1017 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); 1018 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); 1019 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); 1020 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); 1021 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); 1022 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); 1023 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); 1024 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); 1025 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); 1026 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); 1027 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); 1028 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); 1029 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); 1030 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); 1031 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); 1032 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION); 1033 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE); 1034 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME); 1035 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE); 1036 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE); 1037 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY); 1038#if 0 /* not appropriate for TLS, not used for DTLS */ 1039 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return 1040 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE); 1041#endif 1042 default: return(-1); 1043 } 1044 } 1045 1046