ssl/t1_enc.c

   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 "evp.h"
  61 #include "hmac.h"
  62 #include "ssl_locl.h"
  63
  64 static void tls1_P_hash(md,sec,sec_len,seed,seed_len,out,olen)
  65 EVP_MD *md;
  66 unsigned char *sec;
  67 int sec_len;
  68 unsigned char *seed;
  69 int seed_len;
  70 unsigned char *out;
  71 int olen;
  72         {
  73         int chunk,n;
  74         unsigned int j;
  75         HMAC_CTX ctx;
  76         HMAC_CTX ctx_tmp;
  77         unsigned char A1[HMAC_MAX_MD_CBLOCK];
  78         unsigned int A1_len;
  79
  80         chunk=EVP_MD_size(md);
  81
  82         HMAC_Init(&ctx,sec,sec_len,md);
  83         HMAC_Update(&ctx,seed,seed_len);
  84         HMAC_Final(&ctx,A1,&A1_len);
  85
  86         n=0;
  87         for (;;)
  88                 {
  89                 HMAC_Init(&ctx,NULL,0,NULL); /* re-init */
  90                 HMAC_Update(&ctx,A1,A1_len);
  91                 memcpy(&ctx_tmp,&ctx,sizeof(ctx)); /* Copy for A2 */ /* not needed for last one */
  92                 HMAC_Update(&ctx,seed,seed_len);
  93
  94                 if (olen > chunk)
  95                         {
  96                         HMAC_Final(&ctx,out,&j);
  97                         out+=j;
  98                         olen-=j;
  99                         HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
 100                         }
 101                 else    /* last one */
 102                         {
 103                         HMAC_Final(&ctx,A1,&A1_len);
 104                         memcpy(out,A1,olen);
 105                         break;
 106                         }
 107                 }
 108         HMAC_cleanup(&ctx);
 109         HMAC_cleanup(&ctx_tmp);
 110         memset(A1,0,sizeof(A1));
 111         }
 112
 113 static void tls1_PRF(md5,sha1,label,label_len,sec,slen,out1,out2,olen)
 114 EVP_MD *md5;
 115 EVP_MD *sha1;
 116 unsigned char *label;
 117 int label_len;
 118 unsigned char *sec;
 119 int slen;
 120 unsigned char *out1;
 121 unsigned char *out2;
 122 int olen;
 123         {
 124         int len,i;
 125         unsigned char *S1,*S2;
 126
 127         len=slen/2;
 128         S1=sec;
 129         S2= &(sec[len]);
 130         len+=(slen&1); /* add for odd, make longer */
 131
 132
 133         tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
 134         tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);
 135
 136         for (i=0; i<olen; i++)
 137                 out1[i]^=out2[i];
 138         }
 139
 140 static void tls1_generate_key_block(s,km,tmp,num)
 141 SSL *s;
 142 unsigned char *km,*tmp;
 143 int num;
 144         {
 145         unsigned char *p;
 146         unsigned char buf[SSL3_RANDOM_SIZE*2+
 147                 TLS_MD_MAX_CONST_SIZE];
 148         p=buf;
 149
 150         memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
 151                 TLS_MD_KEY_EXPANSION_CONST_SIZE);
 152         p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
 153         memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
 154         p+=SSL3_RANDOM_SIZE;
 155         memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 156         p+=SSL3_RANDOM_SIZE;
 157
 158         tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,
 159                 s->session->master_key,s->session->master_key_length,
 160                 km,tmp,num);
 161         }
 162
 163 int tls1_change_cipher_state(s,which)
 164 SSL *s;
 165 int which;
 166         {
 167         unsigned char *p,*key_block,*mac_secret;
 168         unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
 169                 SSL3_RANDOM_SIZE*2];
 170         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
 171         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
 172         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
 173         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
 174         unsigned char *ms,*key,*iv,*er1,*er2;
 175         int client_write;
 176         EVP_CIPHER_CTX *dd;
 177         EVP_CIPHER *c;
 178         SSL_COMPRESSION *comp;
 179         EVP_MD *m;
 180         int exp,n,i,j,k,exp_label_len;
 181
 182         exp=(s->s3->tmp.new_cipher->algorithms & SSL_EXPORT)?1:0;
 183         c=s->s3->tmp.new_sym_enc;
 184         m=s->s3->tmp.new_hash;
 185         comp=s->s3->tmp.new_compression;
 186         key_block=s->s3->tmp.key_block;
 187
 188         if (which & SSL3_CC_READ)
 189                 {
 190                 if ((s->enc_read_ctx == NULL) &&
 191                         ((s->enc_read_ctx=(EVP_CIPHER_CTX *)
 192                         Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
 193                         goto err;
 194                 dd= s->enc_read_ctx;
 195                 s->read_hash=m;
 196                 s->read_compression=comp;
 197                 memset(&(s->s3->read_sequence[0]),0,8);
 198                 mac_secret= &(s->s3->read_mac_secret[0]);
 199                 }
 200         else
 201                 {
 202                 if ((s->enc_write_ctx == NULL) &&
 203                         ((s->enc_write_ctx=(EVP_CIPHER_CTX *)
 204                         Malloc(sizeof(EVP_CIPHER_CTX))) == NULL))
 205                         goto err;
 206                 dd= s->enc_write_ctx;
 207                 s->write_hash=m;
 208                 s->write_compression=comp;
 209                 memset(&(s->s3->write_sequence[0]),0,8);
 210                 mac_secret= &(s->s3->write_mac_secret[0]);
 211                 }
 212
 213         EVP_CIPHER_CTX_init(dd);
 214
 215         p=s->s3->tmp.key_block;
 216         i=EVP_MD_size(m);
 217         j=(exp)?5:EVP_CIPHER_key_length(c);
 218         k=EVP_CIPHER_iv_length(c);
 219         er1= &(s->s3->client_random[0]);
 220         er2= &(s->s3->server_random[0]);
 221         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 222                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
 223                 {
 224                 ms=  &(p[ 0]); n=i+i;
 225                 key= &(p[ n]); n+=j+j;
 226                 iv=  &(p[ n]); n+=k+k;
 227                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
 228                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
 229                 client_write=1;
 230                 }
 231         else
 232                 {
 233                 n=i;
 234                 ms=  &(p[ n]); n+=i+j;
 235                 key= &(p[ n]); n+=j+k;
 236                 iv=  &(p[ n]); n+=k;
 237                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
 238                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
 239                 client_write=0;
 240                 }
 241
 242         if (n > s->s3->tmp.key_block_length)
 243                 {
 244                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_INTERNAL_ERROR);
 245                 goto err2;
 246                 }
 247
 248         memcpy(mac_secret,ms,i);
 249 #ifdef TLS_DEBUG
 250 printf("which = %04X\nmac key=",which);
 251 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
 252 #endif
 253         if (exp)
 254                 {
 255                 /* In here I set both the read and write key/iv to the
 256                  * same value since only the correct one will be used :-).
 257                  */
 258                 p=buf;
 259                 memcpy(p,exp_label,exp_label_len);
 260                 p+=exp_label_len;
 261                 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 262                 p+=SSL3_RANDOM_SIZE;
 263                 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
 264                 p+=SSL3_RANDOM_SIZE;
 265                 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,key,j,
 266                         tmp1,tmp2,EVP_CIPHER_key_length(c));
 267                 key=tmp1;
 268
 269                 if (k > 0)
 270                         {
 271                         p=buf;
 272                         memcpy(p,TLS_MD_IV_BLOCK_CONST,
 273                                 TLS_MD_IV_BLOCK_CONST_SIZE);
 274                         p+=TLS_MD_IV_BLOCK_CONST_SIZE;
 275                         memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
 276                         p+=SSL3_RANDOM_SIZE;
 277                         memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
 278                         p+=SSL3_RANDOM_SIZE;
 279                         tls1_PRF(s->ctx->md5,s->ctx->sha1,
 280                                 buf,p-buf,"",0,iv1,iv2,k*2);
 281                         if (client_write)
 282                                 iv=iv1;
 283                         else
 284                                 iv= &(iv1[k]);
 285                         }
 286                 }
 287
 288         s->session->key_arg_length=0;
 289
 290         EVP_CipherInit(dd,c,key,iv,(which & SSL3_CC_WRITE));
 291 #ifdef TLS_DEBUG
 292 printf("which = %04X\nkey=",which);
 293 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
 294 printf("\niv=");
 295 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
 296 printf("\n");
 297 #endif
 298
 299         memset(tmp1,0,sizeof(tmp1));
 300         memset(tmp2,0,sizeof(tmp1));
 301         memset(iv1,0,sizeof(iv1));
 302         memset(iv2,0,sizeof(iv2));
 303         return(1);
 304 err:
 305         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
 306 err2:
 307         return(0);
 308         }
 309
 310 int tls1_setup_key_block(s)
 311 SSL *s;
 312         {
 313         unsigned char *p1,*p2;
 314         EVP_CIPHER *c;
 315         EVP_MD *hash;
 316         int num,exp;
 317
 318         if (s->s3->tmp.key_block_length != 0)
 319                 return(1);
 320
 321         if (!ssl_cipher_get_evp(s->session->cipher,&c,&hash))
 322                 {
 323                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 324                 return(0);
 325                 }
 326
 327         s->s3->tmp.new_sym_enc=c;
 328         s->s3->tmp.new_hash=hash;
 329
 330         exp=(s->session->cipher->algorithms & SSL_EXPORT)?1:0;
 331
 332         num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
 333         num*=2;
 334
 335         ssl3_cleanup_key_block(s);
 336
 337         if ((p1=(unsigned char *)Malloc(num)) == NULL)
 338                 goto err;
 339         if ((p2=(unsigned char *)Malloc(num)) == NULL)
 340                 goto err;
 341
 342         s->s3->tmp.key_block_length=num;
 343         s->s3->tmp.key_block=p1;
 344
 345
 346 #ifdef TLS_DEBUG
 347 printf("client random\n");
 348 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
 349 printf("server random\n");
 350 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
 351 printf("pre-master\n");
 352 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
 353 #endif
 354         tls1_generate_key_block(s,p1,p2,num);
 355         memset(p2,0,num);
 356         Free(p2);
 357 #ifdef TLS_DEBUG
 358 printf("\nkey block\n");
 359 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
 360 #endif
 361
 362         return(1);
 363 err:
 364         SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 365         return(0);
 366         }
 367
 368 int tls1_enc(s,send)
 369 SSL *s;
 370 int send;
 371         {
 372         SSL3_RECORD *rec;
 373         EVP_CIPHER_CTX *ds;
 374         unsigned long l;
 375         int bs,i,ii,j,k,n=0;
 376         EVP_CIPHER *enc;
 377         SSL_COMPRESSION *comp;
 378
 379         if (send)
 380                 {
 381                 if (s->write_hash != NULL)
 382                         n=EVP_MD_size(s->write_hash);
 383                 ds=s->enc_write_ctx;
 384                 rec= &(s->s3->wrec);
 385                 if (s->enc_write_ctx == NULL)
 386                         { enc=NULL; comp=NULL; }
 387                 else
 388                         {
 389                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
 390                         comp=s->write_compression;
 391                         }
 392                 }
 393         else
 394                 {
 395                 if (s->read_hash != NULL)
 396                         n=EVP_MD_size(s->read_hash);
 397                 ds=s->enc_read_ctx;
 398                 rec= &(s->s3->rrec);
 399                 if (s->enc_read_ctx == NULL)
 400                         { enc=NULL; comp=NULL; }
 401                 else
 402                         {
 403                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
 404                         comp=s->read_compression;
 405                         }
 406                 }
 407
 408         if ((s->session == NULL) || (ds == NULL) ||
 409                 ((enc == NULL) && (comp == NULL)))
 410                 {
 411                 memcpy(rec->data,rec->input,rec->length);
 412                 rec->input=rec->data;
 413                 }
 414         else
 415                 {
 416                 l=rec->length;
 417                 bs=EVP_CIPHER_block_size(ds->cipher);
 418
 419                 if ((bs != 1) && send)
 420                         {
 421                         i=bs-((int)l%bs);
 422
 423                         /* Add weird padding of upto 256 bytes */
 424
 425                         /* we need to add 'i' padding bytes of value j */
 426                         j=i-1;
 427                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
 428                                 {
 429                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 430                                         j++;
 431                                 }
 432                         for (k=(int)l; k<(int)(l+i); k++)
 433                                 rec->input[k]=j;
 434                         l+=i;
 435                         rec->length+=i;
 436                         }
 437
 438                 EVP_Cipher(ds,rec->data,rec->input,l);
 439
 440                 if ((bs != 1) && !send)
 441                         {
 442                         ii=i=rec->data[l-1];
 443                         i++;
 444                         if (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
 445                                 {
 446                                 /* First packet is even in size, so check */
 447                                 if ((memcmp(s->s3->read_sequence,
 448                                         "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
 449                                         s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
 450                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 451                                         i--;
 452                                 }
 453                         if (i > (int)rec->length)
 454                                 {
 455                                 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
 456                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
 457                                 return(0);
 458                                 }
 459                         for (j=(int)(l-i); j<(int)l; j++)
 460                                 {
 461                                 if (rec->data[j] != ii)
 462                                         {
 463                                         SSLerr(SSL_F_TLS1_ENC,SSL_R_DECRYPTION_FAILED);
 464                                         ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
 465                                         return(0);
 466                                         }
 467                                 }
 468                         rec->length-=i;
 469                         }
 470                 }
 471         return(1);
 472         }
 473
 474 int tls1_cert_verify_mac(s,in_ctx,out)
 475 SSL *s;
 476 EVP_MD_CTX *in_ctx;
 477 unsigned char *out;
 478         {
 479         unsigned int ret;
 480         EVP_MD_CTX ctx;
 481
 482         memcpy(&ctx,in_ctx,sizeof(EVP_MD_CTX));
 483         EVP_DigestFinal(&ctx,out,&ret);
 484         return((int)ret);
 485         }
 486
 487 int tls1_final_finish_mac(s,in1_ctx,in2_ctx,str,slen,out)
 488 SSL *s;
 489 EVP_MD_CTX *in1_ctx,*in2_ctx;
 490 unsigned char *str;
 491 int slen;
 492 unsigned char *out;
 493         {
 494         unsigned int i;
 495         EVP_MD_CTX ctx;
 496         unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
 497         unsigned char *q,buf2[12];
 498
 499         q=buf;
 500         memcpy(q,str,slen);
 501         q+=slen;
 502
 503         memcpy(&ctx,in1_ctx,sizeof(EVP_MD_CTX));
 504         EVP_DigestFinal(&ctx,q,&i);
 505         q+=i;
 506         memcpy(&ctx,in2_ctx,sizeof(EVP_MD_CTX));
 507         EVP_DigestFinal(&ctx,q,&i);
 508         q+=i;
 509
 510         tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,q-buf,
 511                 s->session->master_key,s->session->master_key_length,
 512                 out,buf2,12);
 513         memset(&ctx,0,sizeof(EVP_MD_CTX));
 514
 515         return((int)12);
 516         }
 517
 518 int tls1_mac(ssl,md,send)
 519 SSL *ssl;
 520 unsigned char *md;
 521 int send;
 522         {
 523         SSL3_RECORD *rec;
 524         unsigned char *mac_sec,*seq;
 525         EVP_MD *hash;
 526         unsigned int md_size;
 527         int i;
 528         HMAC_CTX hmac;
 529         unsigned char buf[5];
 530
 531         if (send)
 532                 {
 533                 rec= &(ssl->s3->wrec);
 534                 mac_sec= &(ssl->s3->write_mac_secret[0]);
 535                 seq= &(ssl->s3->write_sequence[0]);
 536                 hash=ssl->write_hash;
 537                 }
 538         else
 539                 {
 540                 rec= &(ssl->s3->rrec);
 541                 mac_sec= &(ssl->s3->read_mac_secret[0]);
 542                 seq= &(ssl->s3->read_sequence[0]);
 543                 hash=ssl->read_hash;
 544                 }
 545
 546         md_size=EVP_MD_size(hash);
 547
 548         buf[0]=rec->type;
 549         buf[1]=TLS1_VERSION_MAJOR;
 550         buf[2]=TLS1_VERSION_MINOR;
 551         buf[3]=rec->length>>8;
 552         buf[4]=rec->length&0xff;
 553
 554         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
 555         HMAC_Init(&hmac,mac_sec,EVP_MD_size(hash),hash);
 556         HMAC_Update(&hmac,seq,8);
 557         HMAC_Update(&hmac,buf,5);
 558         HMAC_Update(&hmac,rec->input,rec->length);
 559         HMAC_Final(&hmac,md,&md_size);
 560
 561 #ifdef TLS_DEBUG
 562 printf("sec=");
 563 {int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
 564 printf("seq=");
 565 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
 566 printf("buf=");
 567 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
 568 printf("rec=");
 569 {int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
 570 #endif
 571
 572         for (i=7; i>=0; i--)
 573                 if (++seq[i]) break;
 574
 575 #ifdef TLS_DEBUG
 576 {int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
 577 #endif
 578         return(md_size);
 579         }
 580
 581 int tls1_generate_master_secret(s,out,p,len)
 582 SSL *s;
 583 unsigned char *out;
 584 unsigned char *p;
 585 int len;
 586         {
 587         unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
 588         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
 589
 590         /* Setup the stuff to munge */
 591         memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
 592                 TLS_MD_MASTER_SECRET_CONST_SIZE);
 593         memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
 594                 s->s3->client_random,SSL3_RANDOM_SIZE);
 595         memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
 596                 s->s3->server_random,SSL3_RANDOM_SIZE);
 597         tls1_PRF(s->ctx->md5,s->ctx->sha1,
 598                 buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
 599                 s->session->master_key,buff,SSL3_MASTER_SECRET_SIZE);
 600         return(SSL3_MASTER_SECRET_SIZE);
 601         }
 602
 603 int tls1_alert_code(code)
 604 int code;
 605         {
 606         switch (code)
 607                 {
 608         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
 609         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
 610         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
 611         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
 612         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
 613         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
 614         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
 615         case SSL_AD_NO_CERTIFICATE:     return(-1);
 616         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
 617         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
 618         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
 619         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
 620         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
 621         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
 622         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
 623         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
 624         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
 625         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
 626         case SSL_AD_EXPORT_RESTRICION:  return(TLS1_AD_EXPORT_RESTRICION);
 627         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
 628         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
 629         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
 630         case SSL_AD_USER_CANCLED:       return(TLS1_AD_USER_CANCLED);
 631         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
 632         default:                        return(-1);
 633                 }
 634         }
 635