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 #include <stdio.h> 60 #include <openssl/comp.h> 61 #include <openssl/md5.h> 62 #include <openssl/sha.h> 63 #include <openssl/evp.h> 64 #include <openssl/hmac.h> 65 #include "ssl_locl.h" 66 67 static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec, 68 int sec_len, unsigned char *seed, int seed_len, 69 unsigned char *out, int olen) 70 { 71 int chunk,n; 72 unsigned int j; 73 HMAC_CTX ctx; 74 HMAC_CTX ctx_tmp; 75 unsigned char A1[HMAC_MAX_MD_CBLOCK]; 76 unsigned int A1_len; 77 78 chunk=EVP_MD_size(md); 79 80 HMAC_Init(&ctx,sec,sec_len,md); 81 HMAC_Update(&ctx,seed,seed_len); 82 HMAC_Final(&ctx,A1,&A1_len); 83 84 n=0; 85 for (;;) 86 { 87 HMAC_Init(&ctx,NULL,0,NULL); /* re-init */ 88 HMAC_Update(&ctx,A1,A1_len); 89 memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */ 90 HMAC_Update(&ctx,seed,seed_len); 91 92 if (olen > chunk) 93 { 94 HMAC_Final(&ctx,out,&j); 95 out+=j; 96 olen-=j; 97 HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */ 98 } 99 else /* last one */ 100 { 101 HMAC_Final(&ctx,A1,&A1_len); 102 memcpy(out,A1,olen); 103 break; 104 } 105 } 106 HMAC_cleanup(&ctx); 107 HMAC_cleanup(&ctx_tmp); 108 memset(A1,0,sizeof(A1)); 109 } 110 111 static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1, 112 unsigned char *label, int label_len, 113 const unsigned char *sec, int slen, unsigned char *out1, 114 unsigned char *out2, int olen) 115 { 116 int len,i; 117 const unsigned char *S1,*S2; 118 119 len=slen/2; 120 S1=sec; 121 S2= &(sec[len]); 122 len+=(slen&1); /* add for odd, make longer */ 123 124 125 tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen); 126 tls1_P_hash(sha1,S2,len,label,label_len,out2,olen); 127 128 for (i=0; i<olen; i++) 129 out1[i]^=out2[i]; 130 } 131 132 static void tls1_generate_key_block(SSL *s, unsigned char *km, 133 unsigned char *tmp, int num) 134 { 135 unsigned char *p; 136 unsigned char buf[SSL3_RANDOM_SIZE*2+ 137 TLS_MD_MAX_CONST_SIZE]; 138 p=buf; 139 140 memcpy(p,TLS_MD_KEY_EXPANSION_CONST, 141 TLS_MD_KEY_EXPANSION_CONST_SIZE); 142 p+=TLS_MD_KEY_EXPANSION_CONST_SIZE; 143 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); 144 p+=SSL3_RANDOM_SIZE; 145 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 146 p+=SSL3_RANDOM_SIZE; 147 148 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf), 149 s->session->master_key,s->session->master_key_length, 150 km,tmp,num); 151 } 152 153 int tls1_change_cipher_state(SSL *s, int which) 154 { 155 static const unsigned char empty[]=""; 156 unsigned char *p,*key_block,*mac_secret; 157 unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+ 158 SSL3_RANDOM_SIZE*2]; 159 unsigned char tmp1[EVP_MAX_KEY_LENGTH]; 160 unsigned char tmp2[EVP_MAX_KEY_LENGTH]; 161 unsigned char iv1[EVP_MAX_IV_LENGTH*2]; 162 unsigned char iv2[EVP_MAX_IV_LENGTH*2]; 163 unsigned char *ms,*key,*iv,*er1,*er2; 164 int client_write; 165 EVP_CIPHER_CTX *dd; 166 const EVP_CIPHER *c; 167 const SSL_COMP *comp; 168 const EVP_MD *m; 169 int _exp,n,i,j,k,exp_label_len,cl; 170 171 _exp=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher); 172 c=s->s3->tmp.new_sym_enc; 173 m=s->s3->tmp.new_hash; 174 comp=s->s3->tmp.new_compression; 175 key_block=s->s3->tmp.key_block; 176 177 if (which & SSL3_CC_READ) 178 { 179 if ((s->enc_read_ctx == NULL) && 180 ((s->enc_read_ctx=(EVP_CIPHER_CTX *) 181 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) 182 goto err; 183 dd= s->enc_read_ctx; 184 s->read_hash=m; 185 if (s->expand != NULL) 186 { 187 COMP_CTX_free(s->expand); 188 s->expand=NULL; 189 } 190 if (comp != NULL) 191 { 192 s->expand=COMP_CTX_new(comp->method); 193 if (s->expand == NULL) 194 { 195 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 196 goto err2; 197 } 198 if (s->s3->rrec.comp == NULL) 199 s->s3->rrec.comp=(unsigned char *) 200 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH); 201 if (s->s3->rrec.comp == NULL) 202 goto err; 203 } 204 memset(&(s->s3->read_sequence[0]),0,8); 205 mac_secret= &(s->s3->read_mac_secret[0]); 206 } 207 else 208 { 209 if ((s->enc_write_ctx == NULL) && 210 ((s->enc_write_ctx=(EVP_CIPHER_CTX *) 211 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) 212 goto err; 213 dd= s->enc_write_ctx; 214 s->write_hash=m; 215 if (s->compress != NULL) 216 { 217 COMP_CTX_free(s->compress); 218 s->compress=NULL; 219 } 220 if (comp != NULL) 221 { 222 s->compress=COMP_CTX_new(comp->method); 223 if (s->compress == NULL) 224 { 225 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR); 226 goto err2; 227 } 228 } 229 memset(&(s->s3->write_sequence[0]),0,8); 230 mac_secret= &(s->s3->write_mac_secret[0]); 231 } 232 233 EVP_CIPHER_CTX_init(dd); 234 235 p=s->s3->tmp.key_block; 236 i=EVP_MD_size(m); 237 cl=EVP_CIPHER_key_length(c); 238 j=_exp ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? 239 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; 240 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ 241 k=EVP_CIPHER_iv_length(c); 242 er1= &(s->s3->client_random[0]); 243 er2= &(s->s3->server_random[0]); 244 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || 245 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) 246 { 247 ms= &(p[ 0]); n=i+i; 248 key= &(p[ n]); n+=j+j; 249 iv= &(p[ n]); n+=k+k; 250 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST; 251 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE; 252 client_write=1; 253 } 254 else 255 { 256 n=i; 257 ms= &(p[ n]); n+=i+j; 258 key= &(p[ n]); n+=j+k; 259 iv= &(p[ n]); n+=k; 260 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST; 261 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE; 262 client_write=0; 263 } 264 265 if (n > s->s3->tmp.key_block_length) 266 { 267 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR); 268 goto err2; 269 } 270 271 memcpy(mac_secret,ms,i); 272 #ifdef TLS_DEBUG 273 printf("which = %04X\nmac key=",which); 274 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); } 275 #endif 276 if (_exp) 277 { 278 /* In here I set both the read and write key/iv to the 279 * same value since only the correct one will be used :-). 280 */ 281 p=buf; 282 memcpy(p,exp_label,exp_label_len); 283 p+=exp_label_len; 284 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 285 p+=SSL3_RANDOM_SIZE; 286 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); 287 p+=SSL3_RANDOM_SIZE; 288 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j, 289 tmp1,tmp2,EVP_CIPHER_key_length(c)); 290 key=tmp1; 291 292 if (k > 0) 293 { 294 p=buf; 295 memcpy(p,TLS_MD_IV_BLOCK_CONST, 296 TLS_MD_IV_BLOCK_CONST_SIZE); 297 p+=TLS_MD_IV_BLOCK_CONST_SIZE; 298 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 299 p+=SSL3_RANDOM_SIZE; 300 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); 301 p+=SSL3_RANDOM_SIZE; 302 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0, 303 iv1,iv2,k*2); 304 if (client_write) 305 iv=iv1; 306 else 307 iv= &(iv1[k]); 308 } 309 } 310 311 s->session->key_arg_length=0; 312 313 EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE)); 314 #ifdef TLS_DEBUG 315 printf("which = %04X\nkey=",which); 316 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); } 317 printf("\niv="); 318 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); } 319 printf("\n"); 320 #endif 321 322 memset(tmp1,0,sizeof(tmp1)); 323 memset(tmp2,0,sizeof(tmp1)); 324 memset(iv1,0,sizeof(iv1)); 325 memset(iv2,0,sizeof(iv2)); 326 return(1); 327 err: 328 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE); 329 err2: 330 return(0); 331 } 332 333 int tls1_setup_key_block(SSL *s) 334 { 335 unsigned char *p1,*p2; 336 const EVP_CIPHER *c; 337 const EVP_MD *hash; 338 int num; 339 SSL_COMP *comp; 340 341 if (s->s3->tmp.key_block_length != 0) 342 return(1); 343 344 if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp)) 345 { 346 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE); 347 return(0); 348 } 349 350 s->s3->tmp.new_sym_enc=c; 351 s->s3->tmp.new_hash=hash; 352 353 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c); 354 num*=2; 355 356 ssl3_cleanup_key_block(s); 357 358 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL) 359 goto err; 360 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL) 361 goto err; 362 363 s->s3->tmp.key_block_length=num; 364 s->s3->tmp.key_block=p1; 365 366 367 #ifdef TLS_DEBUG 368 printf("client random\n"); 369 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); } 370 printf("server random\n"); 371 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); } 372 printf("pre-master\n"); 373 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); } 374 #endif 375 tls1_generate_key_block(s,p1,p2,num); 376 memset(p2,0,num); 377 OPENSSL_free(p2); 378 #ifdef TLS_DEBUG 379 printf("\nkey block\n"); 380 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); } 381 #endif 382 383 return(1); 384 err: 385 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE); 386 return(0); 387 } 388 389 int tls1_enc(SSL *s, int send) 390 { 391 SSL3_RECORD *rec; 392 EVP_CIPHER_CTX *ds; 393 unsigned long l; 394 int bs,i,ii,j,k,n=0; 395 const EVP_CIPHER *enc; 396 397 if (send) 398 { 399 if (s->write_hash != NULL) 400 n=EVP_MD_size(s->write_hash); 401 ds=s->enc_write_ctx; 402 rec= &(s->s3->wrec); 403 if (s->enc_write_ctx == NULL) 404 enc=NULL; 405 else 406 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); 407 } 408 else 409 { 410 if (s->read_hash != NULL) 411 n=EVP_MD_size(s->read_hash); 412 ds=s->enc_read_ctx; 413 rec= &(s->s3->rrec); 414 if (s->enc_read_ctx == NULL) 415 enc=NULL; 416 else 417 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); 418 } 419 420 if ((s->session == NULL) || (ds == NULL) || 421 (enc == NULL)) 422 { 423 memmove(rec->data,rec->input,rec->length); 424 rec->input=rec->data; 425 } 426 else 427 { 428 l=rec->length; 429 bs=EVP_CIPHER_block_size(ds->cipher); 430 431 if ((bs != 1) && send) 432 { 433 i=bs-((int)l%bs); 434 435 /* Add weird padding of upto 256 bytes */ 436 437 /* we need to add 'i' padding bytes of value j */ 438 j=i-1; 439 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) 440 { 441 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 442 j++; 443 } 444 for (k=(int)l; k<(int)(l+i); k++) 445 rec->input[k]=j; 446 l+=i; 447 rec->length+=i; 448 } 449 450 if (!send) 451 { 452 if (l == 0 || l%bs != 0) 453 { 454 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); 455 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPT_ERROR); 456 return(0); 457 } 458 } 459 460 EVP_Cipher(ds,rec->data,rec->input,l); 461 462 if ((bs != 1) && !send) 463 { 464 ii=i=rec->data[l-1]; /* padding_length */ 465 i++; 466 if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG) 467 { 468 /* First packet is even in size, so check */ 469 if ((memcmp(s->s3->read_sequence, 470 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1)) 471 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG; 472 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) 473 i--; 474 } 475 /* TLS 1.0 does not bound the number of padding bytes by the block size. 476 * All of them must have value 'padding_length'. */ 477 if (i > (int)rec->length) 478 { 479 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG); 480 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); 481 return(0); 482 } 483 for (j=(int)(l-i); j<(int)l; j++) 484 { 485 if (rec->data[j] != ii) 486 { 487 SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED); 488 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED); 489 return(0); 490 } 491 } 492 rec->length-=i; 493 } 494 } 495 return(1); 496 } 497 498 int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out) 499 { 500 unsigned int ret; 501 EVP_MD_CTX ctx; 502 503 EVP_MD_CTX_copy(&ctx,in_ctx); 504 EVP_DigestFinal(&ctx,out,&ret); 505 return((int)ret); 506 } 507 508 int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx, 509 const char *str, int slen, unsigned char *out) 510 { 511 unsigned int i; 512 EVP_MD_CTX ctx; 513 unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 514 unsigned char *q,buf2[12]; 515 516 q=buf; 517 memcpy(q,str,slen); 518 q+=slen; 519 520 EVP_MD_CTX_copy(&ctx,in1_ctx); 521 EVP_DigestFinal(&ctx,q,&i); 522 q+=i; 523 EVP_MD_CTX_copy(&ctx,in2_ctx); 524 EVP_DigestFinal(&ctx,q,&i); 525 q+=i; 526 527 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf), 528 s->session->master_key,s->session->master_key_length, 529 out,buf2,12); 530 memset(&ctx,0,sizeof(EVP_MD_CTX)); 531 532 return((int)12); 533 } 534 535 int tls1_mac(SSL *ssl, unsigned char *md, int send) 536 { 537 SSL3_RECORD *rec; 538 unsigned char *mac_sec,*seq; 539 const EVP_MD *hash; 540 unsigned int md_size; 541 int i; 542 HMAC_CTX hmac; 543 unsigned char buf[5]; 544 545 if (send) 546 { 547 rec= &(ssl->s3->wrec); 548 mac_sec= &(ssl->s3->write_mac_secret[0]); 549 seq= &(ssl->s3->write_sequence[0]); 550 hash=ssl->write_hash; 551 } 552 else 553 { 554 rec= &(ssl->s3->rrec); 555 mac_sec= &(ssl->s3->read_mac_secret[0]); 556 seq= &(ssl->s3->read_sequence[0]); 557 hash=ssl->read_hash; 558 } 559 560 md_size=EVP_MD_size(hash); 561 562 buf[0]=rec->type; 563 buf[1]=TLS1_VERSION_MAJOR; 564 buf[2]=TLS1_VERSION_MINOR; 565 buf[3]=rec->length>>8; 566 buf[4]=rec->length&0xff; 567 568 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */ 569 HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash); 570 HMAC_Update(&hmac,seq,8); 571 HMAC_Update(&hmac,buf,5); 572 HMAC_Update(&hmac,rec->input,rec->length); 573 HMAC_Final(&hmac,md,&md_size); 574 575 #ifdef TLS_DEBUG 576 printf("sec="); 577 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); } 578 printf("seq="); 579 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); } 580 printf("buf="); 581 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); } 582 printf("rec="); 583 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); } 584 #endif 585 586 for (i=7; i>=0; i--) 587 { 588 ++seq[i]; 589 if (seq[i] != 0) break; 590 } 591 592 #ifdef TLS_DEBUG 593 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); } 594 #endif 595 return(md_size); 596 } 597 598 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p, 599 int len) 600 { 601 unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE]; 602 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH]; 603 604 /* Setup the stuff to munge */ 605 memcpy(buf,TLS_MD_MASTER_SECRET_CONST, 606 TLS_MD_MASTER_SECRET_CONST_SIZE); 607 memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]), 608 s->s3->client_random,SSL3_RANDOM_SIZE); 609 memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]), 610 s->s3->server_random,SSL3_RANDOM_SIZE); 611 tls1_PRF(s->ctx->md5,s->ctx->sha1, 612 buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len, 613 s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE); 614 return(SSL3_MASTER_SECRET_SIZE); 615 } 616 617 int tls1_alert_code(int code) 618 { 619 switch (code) 620 { 621 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY); 622 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE); 623 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC); 624 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED); 625 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW); 626 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE); 627 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE); 628 case SSL_AD_NO_CERTIFICATE: return(-1); 629 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE); 630 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE); 631 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED); 632 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED); 633 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN); 634 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER); 635 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA); 636 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED); 637 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR); 638 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR); 639 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION); 640 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION); 641 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY); 642 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR); 643 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED); 644 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION); 645 default: return(-1); 646 } 647 } 648 649