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  * 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 #include <openssl/rand.h>
 147 #ifdef KSSL_DEBUG
 148 #include <openssl/des.h>
 149 #endif
 150
 151 /* seed1 through seed5 are virtually concatenated */
 152 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
 153                         int sec_len,
 154                         const void *seed1, int seed1_len,
 155                         const void *seed2, int seed2_len,
 156                         const void *seed3, int seed3_len,
 157                         const void *seed4, int seed4_len,
 158                         const void *seed5, int seed5_len,
 159                         unsigned char *out, int olen)
 160         {
 161         int chunk;
 162         size_t j;
 163         EVP_MD_CTX ctx, ctx_tmp, ctx_init;
 164         EVP_PKEY *mac_key;
 165         unsigned char A1[EVP_MAX_MD_SIZE];
 166         size_t A1_len;
 167         int ret = 0;
 168
 169         chunk=EVP_MD_size(md);
 170         OPENSSL_assert(chunk >= 0);
 171
 172         EVP_MD_CTX_init(&ctx);
 173         EVP_MD_CTX_init(&ctx_tmp);
 174         EVP_MD_CTX_init(&ctx_init);
 175         EVP_MD_CTX_set_flags(&ctx_init, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
 176         mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
 177         if (!mac_key)
 178                 goto err;
 179         if (!EVP_DigestSignInit(&ctx_init,NULL,md, NULL, mac_key))
 180                 goto err;
 181         if (!EVP_MD_CTX_copy_ex(&ctx,&ctx_init))
 182                 goto err;
 183         if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
 184                 goto err;
 185         if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
 186                 goto err;
 187         if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
 188                 goto err;
 189         if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
 190                 goto err;
 191         if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
 192                 goto err;
 193         if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
 194                 goto err;
 195
 196         for (;;)
 197                 {
 198                 /* Reinit mac contexts */
 199                 if (!EVP_MD_CTX_copy_ex(&ctx,&ctx_init))
 200                         goto err;
 201                 if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
 202                         goto err;
 203                 if (olen>chunk && !EVP_MD_CTX_copy_ex(&ctx_tmp,&ctx))
 204                         goto err;
 205                 if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
 206                         goto err;
 207                 if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
 208                         goto err;
 209                 if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
 210                         goto err;
 211                 if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
 212                         goto err;
 213                 if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
 214                         goto err;
 215
 216                 if (olen > chunk)
 217                         {
 218                         if (!EVP_DigestSignFinal(&ctx,out,&j))
 219                                 goto err;
 220                         out+=j;
 221                         olen-=j;
 222                         /* calc the next A1 value */
 223                         if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
 224                                 goto err;
 225                         }
 226                 else    /* last one */
 227                         {
 228                         if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
 229                                 goto err;
 230                         memcpy(out,A1,olen);
 231                         break;
 232                         }
 233                 }
 234         ret = 1;
 235 err:
 236         EVP_PKEY_free(mac_key);
 237         EVP_MD_CTX_cleanup(&ctx);
 238         EVP_MD_CTX_cleanup(&ctx_tmp);
 239         EVP_MD_CTX_cleanup(&ctx_init);
 240         OPENSSL_cleanse(A1,sizeof(A1));
 241         return ret;
 242         }
 243
 244 /* seed1 through seed5 are virtually concatenated */
 245 static int tls1_PRF(long digest_mask,
 246                      const void *seed1, int seed1_len,
 247                      const void *seed2, int seed2_len,
 248                      const void *seed3, int seed3_len,
 249                      const void *seed4, int seed4_len,
 250                      const void *seed5, int seed5_len,
 251                      const unsigned char *sec, int slen,
 252                      unsigned char *out1,
 253                      unsigned char *out2, int olen)
 254         {
 255         int len,i,idx,count;
 256         const unsigned char *S1;
 257         long m;
 258         const EVP_MD *md;
 259         int ret = 0;
 260
 261         /* Count number of digests and partition sec evenly */
 262         count=0;
 263         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 264                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
 265         }
 266         len=slen/count;
 267         if (count == 1)
 268                 slen = 0;
 269         S1=sec;
 270         memset(out1,0,olen);
 271         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 272                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
 273                         if (!md) {
 274                                 SSLerr(SSL_F_TLS1_PRF,
 275                                 SSL_R_UNSUPPORTED_DIGEST_TYPE);
 276                                 goto err;
 277                         }
 278                         if (!tls1_P_hash(md ,S1,len+(slen&1),
 279                                         seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
 280                                         out2,olen))
 281                                 goto err;
 282                         S1+=len;
 283                         for (i=0; i<olen; i++)
 284                         {
 285                                 out1[i]^=out2[i];
 286                         }
 287                 }
 288         }
 289         ret = 1;
 290 err:
 291         return ret;
 292 }
 293 static int tls1_generate_key_block(SSL *s, unsigned char *km,
 294              unsigned char *tmp, int num)
 295         {
 296         int ret;
 297         ret = tls1_PRF(ssl_get_algorithm2(s),
 298                  TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
 299                  s->s3->server_random,SSL3_RANDOM_SIZE,
 300                  s->s3->client_random,SSL3_RANDOM_SIZE,
 301                  NULL,0,NULL,0,
 302                  s->session->master_key,s->session->master_key_length,
 303                  km,tmp,num);
 304 #ifdef KSSL_DEBUG
 305         printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
 306                 s->session->master_key_length);
 307         {
 308         int i;
 309         for (i=0; i < s->session->master_key_length; i++)
 310                 {
 311                 printf("%02X", s->session->master_key[i]);
 312                 }
 313         printf("\n");  }
 314 #endif    /* KSSL_DEBUG */
 315         return ret;
 316         }
 317
 318 int tls1_change_cipher_state(SSL *s, int which)
 319         {
 320         static const unsigned char empty[]="";
 321         unsigned char *p,*mac_secret;
 322         unsigned char *exp_label;
 323         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
 324         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
 325         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
 326         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
 327         unsigned char *ms,*key,*iv;
 328         int client_write;
 329         EVP_CIPHER_CTX *dd;
 330         const EVP_CIPHER *c;
 331 #ifndef OPENSSL_NO_COMP
 332         const SSL_COMP *comp;
 333 #endif
 334         const EVP_MD *m;
 335         int mac_type;
 336         int *mac_secret_size;
 337         EVP_MD_CTX *mac_ctx;
 338         EVP_PKEY *mac_key;
 339         int is_export,n,i,j,k,exp_label_len,cl;
 340         int reuse_dd = 0;
 341
 342         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
 343         c=s->s3->tmp.new_sym_enc;
 344         m=s->s3->tmp.new_hash;
 345         mac_type = s->s3->tmp.new_mac_pkey_type;
 346 #ifndef OPENSSL_NO_COMP
 347         comp=s->s3->tmp.new_compression;
 348 #endif
 349
 350 #ifdef KSSL_DEBUG
 351         printf("tls1_change_cipher_state(which= %d) w/\n", which);
 352         printf("\talg= %ld/%ld, comp= %p\n",
 353                s->s3->tmp.new_cipher->algorithm_mkey,
 354                s->s3->tmp.new_cipher->algorithm_auth,
 355                comp);
 356         printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
 357         printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
 358                 c->nid,c->block_size,c->key_len,c->iv_len);
 359         printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
 360         {
 361         int i;
 362         for (i=0; i<s->s3->tmp.key_block_length; i++)
 363                 printf("%02x", s->s3->tmp.key_block[i]);  printf("\n");
 364         }
 365 #endif  /* KSSL_DEBUG */
 366
 367         if (which & SSL3_CC_READ)
 368                 {
 369                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 370                         s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
 371                 else
 372                         s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 373
 374                 if (s->enc_read_ctx != NULL)
 375                         reuse_dd = 1;
 376                 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 377                         goto err;
 378                 else
 379                         /* make sure it's intialized in case we exit later with an error */
 380                         EVP_CIPHER_CTX_init(s->enc_read_ctx);
 381                 dd= s->enc_read_ctx;
 382                 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
 383 #ifndef OPENSSL_NO_COMP
 384                 if (s->expand != NULL)
 385                         {
 386                         COMP_CTX_free(s->expand);
 387                         s->expand=NULL;
 388                         }
 389                 if (comp != NULL)
 390                         {
 391                         s->expand=COMP_CTX_new(comp->method);
 392                         if (s->expand == NULL)
 393                                 {
 394                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 395                                 goto err2;
 396                                 }
 397                         if (s->s3->rrec.comp == NULL)
 398                                 s->s3->rrec.comp=(unsigned char *)
 399                                         OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
 400                         if (s->s3->rrec.comp == NULL)
 401                                 goto err;
 402                         }
 403 #endif
 404                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 405                 if (s->version != DTLS1_VERSION)
 406                         memset(&(s->s3->read_sequence[0]),0,8);
 407                 mac_secret= &(s->s3->read_mac_secret[0]);
 408                 mac_secret_size=&(s->s3->read_mac_secret_size);
 409                 }
 410         else
 411                 {
 412                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 413                         s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
 414                         else
 415                         s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
 416                 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
 417                         reuse_dd = 1;
 418                 else if ((s->enc_write_ctx=EVP_CIPHER_CTX_new()) == NULL)
 419                         goto err;
 420                 dd= s->enc_write_ctx;
 421                 if (SSL_IS_DTLS(s))
 422                         {
 423                         mac_ctx = EVP_MD_CTX_create();
 424                         if (!mac_ctx)
 425                                 goto err;
 426                         s->write_hash = mac_ctx;
 427                         }
 428                 else
 429                         mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
 430 #ifndef OPENSSL_NO_COMP
 431                 if (s->compress != NULL)
 432                         {
 433                         COMP_CTX_free(s->compress);
 434                         s->compress=NULL;
 435                         }
 436                 if (comp != NULL)
 437                         {
 438                         s->compress=COMP_CTX_new(comp->method);
 439                         if (s->compress == NULL)
 440                                 {
 441                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 442                                 goto err2;
 443                                 }
 444                         }
 445 #endif
 446                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 447                 if (s->version != DTLS1_VERSION)
 448                         memset(&(s->s3->write_sequence[0]),0,8);
 449                 mac_secret= &(s->s3->write_mac_secret[0]);
 450                 mac_secret_size = &(s->s3->write_mac_secret_size);
 451                 }
 452
 453         if (reuse_dd)
 454                 EVP_CIPHER_CTX_cleanup(dd);
 455
 456         p=s->s3->tmp.key_block;
 457         i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
 458
 459         cl=EVP_CIPHER_key_length(c);
 460         j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
 461                        cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
 462         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
 463         /* If GCM mode only part of IV comes from PRF */
 464         if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
 465                 k = EVP_GCM_TLS_FIXED_IV_LEN;
 466         else
 467                 k=EVP_CIPHER_iv_length(c);
 468         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 469                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
 470                 {
 471                 ms=  &(p[ 0]); n=i+i;
 472                 key= &(p[ n]); n+=j+j;
 473                 iv=  &(p[ n]); n+=k+k;
 474                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
 475                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
 476                 client_write=1;
 477                 }
 478         else
 479                 {
 480                 n=i;
 481                 ms=  &(p[ n]); n+=i+j;
 482                 key= &(p[ n]); n+=j+k;
 483                 iv=  &(p[ n]); n+=k;
 484                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
 485                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
 486                 client_write=0;
 487                 }
 488
 489         if (n > s->s3->tmp.key_block_length)
 490                 {
 491                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
 492                 goto err2;
 493                 }
 494
 495         memcpy(mac_secret,ms,i);
 496
 497         if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER))
 498                 {
 499                 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
 500                                 mac_secret,*mac_secret_size);
 501                 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
 502                 EVP_PKEY_free(mac_key);
 503                 }
 504 #ifdef TLS_DEBUG
 505 printf("which = %04X\nmac key=",which);
 506 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
 507 #endif
 508         if (is_export)
 509                 {
 510                 /* In here I set both the read and write key/iv to the
 511                  * same value since only the correct one will be used :-).
 512                  */
 513                 if (!tls1_PRF(ssl_get_algorithm2(s),
 514                                 exp_label,exp_label_len,
 515                                 s->s3->client_random,SSL3_RANDOM_SIZE,
 516                                 s->s3->server_random,SSL3_RANDOM_SIZE,
 517                                 NULL,0,NULL,0,
 518                                 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
 519                         goto err2;
 520                 key=tmp1;
 521
 522                 if (k > 0)
 523                         {
 524                         if (!tls1_PRF(ssl_get_algorithm2(s),
 525                                         TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
 526                                         s->s3->client_random,SSL3_RANDOM_SIZE,
 527                                         s->s3->server_random,SSL3_RANDOM_SIZE,
 528                                         NULL,0,NULL,0,
 529                                         empty,0,iv1,iv2,k*2))
 530                                 goto err2;
 531                         if (client_write)
 532                                 iv=iv1;
 533                         else
 534                                 iv= &(iv1[k]);
 535                         }
 536                 }
 537
 538         s->session->key_arg_length=0;
 539 #ifdef KSSL_DEBUG
 540         {
 541         int i;
 542         printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
 543         printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
 544         printf("\n");
 545         printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
 546         printf("\n");
 547         }
 548 #endif  /* KSSL_DEBUG */
 549
 550         if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
 551                 {
 552                 EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE));
 553                 EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
 554                 }
 555         else
 556                 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
 557
 558         /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
 559         if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
 560                 EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY,
 561                                 *mac_secret_size,mac_secret);
 562
 563 #ifdef OPENSSL_SSL_TRACE_CRYPTO
 564         if (s->msg_callback)
 565                 {
 566                 int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0;
 567                 if (*mac_secret_size)
 568                         s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC,
 569                                                 mac_secret, *mac_secret_size,
 570                                                 s, s->msg_callback_arg);
 571                 if (c->key_len)
 572                         s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,
 573                                                 key, c->key_len,
 574                                                 s, s->msg_callback_arg);
 575                 if (k)
 576                         {
 577                         if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
 578                                 wh |= TLS1_RT_CRYPTO_FIXED_IV;
 579                         else
 580                                 wh |= TLS1_RT_CRYPTO_IV;
 581                         s->msg_callback(2, s->version, wh, iv, k,
 582                                                 s, s->msg_callback_arg);
 583                         }
 584                 }
 585 #endif
 586
 587 #ifdef TLS_DEBUG
 588 printf("which = %04X\nkey=",which);
 589 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
 590 printf("\niv=");
 591 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
 592 printf("\n");
 593 #endif
 594
 595         OPENSSL_cleanse(tmp1,sizeof(tmp1));
 596         OPENSSL_cleanse(tmp2,sizeof(tmp1));
 597         OPENSSL_cleanse(iv1,sizeof(iv1));
 598         OPENSSL_cleanse(iv2,sizeof(iv2));
 599         return(1);
 600 err:
 601         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
 602 err2:
 603         return(0);
 604         }
 605
 606 int tls1_setup_key_block(SSL *s)
 607         {
 608         unsigned char *p1,*p2=NULL;
 609         const EVP_CIPHER *c;
 610         const EVP_MD *hash;
 611         int num;
 612         SSL_COMP *comp;
 613         int mac_type= NID_undef,mac_secret_size=0;
 614         int ret=0;
 615
 616 #ifdef KSSL_DEBUG
 617         printf ("tls1_setup_key_block()\n");
 618 #endif  /* KSSL_DEBUG */
 619
 620         if (s->s3->tmp.key_block_length != 0)
 621                 return(1);
 622
 623         if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp, SSL_USE_ETM(s)))
 624                 {
 625                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 626                 return(0);
 627                 }
 628
 629         s->s3->tmp.new_sym_enc=c;
 630         s->s3->tmp.new_hash=hash;
 631         s->s3->tmp.new_mac_pkey_type = mac_type;
 632         s->s3->tmp.new_mac_secret_size = mac_secret_size;
 633         num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
 634         num*=2;
 635
 636         ssl3_cleanup_key_block(s);
 637
 638         if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 639                 {
 640                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 641                 goto err;
 642                 }
 643
 644         s->s3->tmp.key_block_length=num;
 645         s->s3->tmp.key_block=p1;
 646
 647         if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 648                 {
 649                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 650                 goto err;
 651                 }
 652
 653 #ifdef TLS_DEBUG
 654 printf("client random\n");
 655 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
 656 printf("server random\n");
 657 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
 658 printf("master key\n");
 659 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
 660 #endif
 661         if (!tls1_generate_key_block(s,p1,p2,num))
 662                 goto err;
 663 #ifdef TLS_DEBUG
 664 printf("\nkey block\n");
 665 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
 666 #endif
 667
 668         if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
 669                 && s->method->version <= TLS1_VERSION)
 670                 {
 671                 /* enable vulnerability countermeasure for CBC ciphers with
 672                  * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 673                  */
 674                 s->s3->need_empty_fragments = 1;
 675
 676                 if (s->session->cipher != NULL)
 677                         {
 678                         if (s->session->cipher->algorithm_enc == SSL_eNULL)
 679                                 s->s3->need_empty_fragments = 0;
 680
 681 #ifndef OPENSSL_NO_RC4
 682                         if (s->session->cipher->algorithm_enc == SSL_RC4)
 683                                 s->s3->need_empty_fragments = 0;
 684 #endif
 685                         }
 686                 }
 687
 688         ret = 1;
 689 err:
 690         if (p2)
 691                 {
 692                 OPENSSL_cleanse(p2,num);
 693                 OPENSSL_free(p2);
 694                 }
 695         return(ret);
 696         }
 697
 698 /* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
 699  *
 700  * Returns:
 701  *   0: (in non-constant time) if the record is publically invalid (i.e. too
 702  *       short etc).
 703  *   1: if the record's padding is valid / the encryption was successful.
 704  *   -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
 705  *       an internal error occurred.
 706  */
 707 int tls1_enc(SSL *s, int send)
 708         {
 709         SSL3_RECORD *rec;
 710         EVP_CIPHER_CTX *ds;
 711         unsigned long l;
 712         int bs,i,j,k,pad=0,ret,mac_size=0;
 713         const EVP_CIPHER *enc;
 714
 715         if (send)
 716                 {
 717                 if (EVP_MD_CTX_md(s->write_hash))
 718                         {
 719                         int n=EVP_MD_CTX_size(s->write_hash);
 720                         OPENSSL_assert(n >= 0);
 721                         }
 722                 ds=s->enc_write_ctx;
 723                 rec= &(s->s3->wrec);
 724                 if (s->enc_write_ctx == NULL)
 725                         enc=NULL;
 726                 else
 727                         {
 728                         int ivlen;
 729                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
 730                         /* For TLSv1.1 and later explicit IV */
 731                         if (SSL_USE_EXPLICIT_IV(s)
 732                                 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
 733                                 ivlen = EVP_CIPHER_iv_length(enc);
 734                         else
 735                                 ivlen = 0;
 736                         if (ivlen > 1)
 737                                 {
 738                                 if ( rec->data != rec->input)
 739                                         /* we can't write into the input stream:
 740                                          * Can this ever happen?? (steve)
 741                                          */
 742                                         fprintf(stderr,
 743                                                 "%s:%d: rec->data != rec->input\n",
 744                                                 __FILE__, __LINE__);
 745                                 else if (RAND_bytes(rec->input, ivlen) <= 0)
 746                                         return -1;
 747                                 }
 748                         }
 749                 }
 750         else
 751                 {
 752                 if (EVP_MD_CTX_md(s->read_hash))
 753                         {
 754                         int n=EVP_MD_CTX_size(s->read_hash);
 755                         OPENSSL_assert(n >= 0);
 756                         }
 757                 ds=s->enc_read_ctx;
 758                 rec= &(s->s3->rrec);
 759                 if (s->enc_read_ctx == NULL)
 760                         enc=NULL;
 761                 else
 762                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
 763                 }
 764
 765 #ifdef KSSL_DEBUG
 766         printf("tls1_enc(%d)\n", send);
 767 #endif    /* KSSL_DEBUG */
 768
 769         if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
 770                 {
 771                 memmove(rec->data,rec->input,rec->length);
 772                 rec->input=rec->data;
 773                 ret = 1;
 774                 }
 775         else
 776                 {
 777                 l=rec->length;
 778                 bs=EVP_CIPHER_block_size(ds->cipher);
 779
 780                 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
 781                         {
 782                         unsigned char buf[13],*seq;
 783
 784                         seq = send?s->s3->write_sequence:s->s3->read_sequence;
 785
 786                         if (SSL_IS_DTLS(s))
 787                                 {
 788                                 unsigned char dtlsseq[9],*p=dtlsseq;
 789
 790                                 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
 791                                 memcpy(p,&seq[2],6);
 792                                 memcpy(buf,dtlsseq,8);
 793                                 }
 794                         else
 795                                 {
 796                                 memcpy(buf,seq,8);
 797                                 for (i=7; i>=0; i--)    /* increment */
 798                                         {
 799                                         ++seq[i];
 800                                         if (seq[i] != 0) break;
 801                                         }
 802                                 }
 803
 804                         buf[8]=rec->type;
 805                         buf[9]=(unsigned char)(s->version>>8);
 806                         buf[10]=(unsigned char)(s->version);
 807                         buf[11]=rec->length>>8;
 808                         buf[12]=rec->length&0xff;
 809                         pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
 810                         if (send)
 811                                 {
 812                                 l+=pad;
 813                                 rec->length+=pad;
 814                                 }
 815                         }
 816                 else if ((bs != 1) && send)
 817                         {
 818                         i=bs-((int)l%bs);
 819
 820                         /* Add weird padding of upto 256 bytes */
 821
 822                         /* we need to add 'i' padding bytes of value j */
 823                         j=i-1;
 824                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
 825                                 {
 826                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 827                                         j++;
 828                                 }
 829                         for (k=(int)l; k<(int)(l+i); k++)
 830                                 rec->input[k]=j;
 831                         l+=i;
 832                         rec->length+=i;
 833                         }
 834
 835 #ifdef KSSL_DEBUG
 836                 {
 837                 unsigned long ui;
 838                 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
 839                         ds,rec->data,rec->input,l);
 840                 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
 841                         ds->buf_len, ds->cipher->key_len,
 842                         DES_KEY_SZ, DES_SCHEDULE_SZ,
 843                         ds->cipher->iv_len);
 844                 printf("\t\tIV: ");
 845                 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
 846                 printf("\n");
 847                 printf("\trec->input=");
 848                 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
 849                 printf("\n");
 850                 }
 851 #endif  /* KSSL_DEBUG */
 852
 853                 if (!send)
 854                         {
 855                         if (l == 0 || l%bs != 0)
 856                                 return 0;
 857                         }
 858
 859                 i = EVP_Cipher(ds,rec->data,rec->input,l);
 860                 if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER)
 861                                                 ?(i<0)
 862                                                 :(i==0))
 863                         return -1;      /* AEAD can fail to verify MAC */
 864                 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
 865                         {
 866                         rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 867                         rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 868                         rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
 869                         }
 870
 871 #ifdef KSSL_DEBUG
 872                 {
 873                 unsigned long i;
 874                 printf("\trec->data=");
 875                 for (i=0; i<l; i++)
 876                         printf(" %02x", rec->data[i]);  printf("\n");
 877                 }
 878 #endif  /* KSSL_DEBUG */
 879
 880                 ret = 1;
 881                 if (!SSL_USE_ETM(s) && EVP_MD_CTX_md(s->read_hash) != NULL)
 882                         mac_size = EVP_MD_CTX_size(s->read_hash);
 883                 if ((bs != 1) && !send)
 884                         ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
 885                 if (pad && !send)
 886                         rec->length -= pad;
 887                 }
 888         return ret;
 889         }
 890
 891 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
 892         {
 893         unsigned int ret;
 894         EVP_MD_CTX ctx, *d=NULL;
 895         int i;
 896
 897         if (s->s3->handshake_buffer)
 898                 if (!ssl3_digest_cached_records(s))
 899                         return 0;
 900
 901         for (i=0;i<SSL_MAX_DIGEST;i++)
 902                 {
 903                   if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
 904                         {
 905                         d=s->s3->handshake_dgst[i];
 906                         break;
 907                         }
 908                 }
 909         if (!d) {
 910                 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
 911                 return 0;
 912         }
 913
 914         EVP_MD_CTX_init(&ctx);
 915         EVP_MD_CTX_copy_ex(&ctx,d);
 916         EVP_DigestFinal_ex(&ctx,out,&ret);
 917         EVP_MD_CTX_cleanup(&ctx);
 918         return((int)ret);
 919         }
 920
 921 int tls1_final_finish_mac(SSL *s,
 922              const char *str, int slen, unsigned char *out)
 923         {
 924         unsigned int i;
 925         EVP_MD_CTX ctx;
 926         unsigned char buf[2*EVP_MAX_MD_SIZE];
 927         unsigned char *q,buf2[12];
 928         int idx;
 929         long mask;
 930         int err=0;
 931         const EVP_MD *md;
 932
 933         q=buf;
 934
 935         if (s->s3->handshake_buffer)
 936                 if (!ssl3_digest_cached_records(s))
 937                         return 0;
 938
 939         EVP_MD_CTX_init(&ctx);
 940
 941         for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
 942                 {
 943                 if (mask & ssl_get_algorithm2(s))
 944                         {
 945                         int hashsize = EVP_MD_size(md);
 946                         EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
 947                         if (!hdgst || hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
 948                                 {
 949                                 /* internal error: 'buf' is too small for this cipersuite! */
 950                                 err = 1;
 951                                 }
 952                         else
 953                                 {
 954                                 if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) ||
 955                                         !EVP_DigestFinal_ex(&ctx,q,&i) ||
 956                                         (i != (unsigned int)hashsize))
 957                                         err = 1;
 958                                 q+=hashsize;
 959                                 }
 960                         }
 961                 }
 962
 963         if (!tls1_PRF(ssl_get_algorithm2(s),
 964                         str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
 965                         s->session->master_key,s->session->master_key_length,
 966                         out,buf2,sizeof buf2))
 967                 err = 1;
 968         EVP_MD_CTX_cleanup(&ctx);
 969
 970         if (err)
 971                 return 0;
 972         else
 973                 return sizeof buf2;
 974         }
 975
 976 int tls1_mac(SSL *ssl, unsigned char *md, int send)
 977         {
 978         SSL3_RECORD *rec;
 979         unsigned char *seq;
 980         EVP_MD_CTX *hash;
 981         size_t md_size;
 982         int i;
 983         EVP_MD_CTX hmac, *mac_ctx;
 984         unsigned char header[13];
 985         int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
 986         int t;
 987
 988         if (send)
 989                 {
 990                 rec= &(ssl->s3->wrec);
 991                 seq= &(ssl->s3->write_sequence[0]);
 992                 hash=ssl->write_hash;
 993                 }
 994         else
 995                 {
 996                 rec= &(ssl->s3->rrec);
 997                 seq= &(ssl->s3->read_sequence[0]);
 998                 hash=ssl->read_hash;
 999                 }
1000
1001         t=EVP_MD_CTX_size(hash);
1002         OPENSSL_assert(t >= 0);
1003         md_size=t;
1004
1005         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
1006         if (stream_mac)
1007                 {
1008                         mac_ctx = hash;
1009                 }
1010                 else
1011                 {
1012                         if (!EVP_MD_CTX_copy(&hmac,hash))
1013                                 return -1;
1014                         mac_ctx = &hmac;
1015                 }
1016
1017         if (SSL_IS_DTLS(ssl))
1018                 {
1019                 unsigned char dtlsseq[8],*p=dtlsseq;
1020
1021                 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
1022                 memcpy (p,&seq[2],6);
1023
1024                 memcpy(header, dtlsseq, 8);
1025                 }
1026         else
1027                 memcpy(header, seq, 8);
1028
1029         header[8]=rec->type;
1030         header[9]=(unsigned char)(ssl->version>>8);
1031         header[10]=(unsigned char)(ssl->version);
1032         header[11]=(rec->length)>>8;
1033         header[12]=(rec->length)&0xff;
1034
1035         if (!send && !SSL_USE_ETM(ssl) &&
1036             EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
1037             ssl3_cbc_record_digest_supported(mac_ctx))
1038                 {
1039                 /* This is a CBC-encrypted record. We must avoid leaking any
1040                  * timing-side channel information about how many blocks of
1041                  * data we are hashing because that gives an attacker a
1042                  * timing-oracle. */
1043                 ssl3_cbc_digest_record(
1044                         mac_ctx,
1045                         md, &md_size,
1046                         header, rec->input,
1047                         rec->length + md_size, rec->orig_len,
1048                         ssl->s3->read_mac_secret,
1049                         ssl->s3->read_mac_secret_size,
1050                         0 /* not SSLv3 */);
1051                 }
1052         else
1053                 {
1054                 EVP_DigestSignUpdate(mac_ctx,header,sizeof(header));
1055                 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
1056                 t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
1057                 OPENSSL_assert(t > 0);
1058 #ifdef OPENSSL_FIPS
1059                 if (!send && !SSL_USE_ETM(ssl) && FIPS_mode())
1060                         tls_fips_digest_extra(
1061                                         ssl->enc_read_ctx,
1062                                         mac_ctx, rec->input,
1063                                         rec->length, rec->orig_len);
1064 #endif
1065                 }
1066
1067         if (!stream_mac)
1068                 EVP_MD_CTX_cleanup(&hmac);
1069 #ifdef TLS_DEBUG
1070 printf("seq=");
1071 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
1072 printf("rec=");
1073 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",rec->data[z]); printf("\n"); }
1074 #endif
1075
1076         if (!SSL_IS_DTLS(ssl))
1077                 {
1078                 for (i=7; i>=0; i--)
1079                         {
1080                         ++seq[i];
1081                         if (seq[i] != 0) break;
1082                         }
1083                 }
1084
1085 #ifdef TLS_DEBUG
1086 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
1087 #endif
1088         return(md_size);
1089         }
1090
1091 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1092              int len)
1093         {
1094         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1095         const void *co = NULL, *so = NULL;
1096         int col = 0, sol = 0;
1097
1098
1099 #ifdef KSSL_DEBUG
1100         printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1101 #endif  /* KSSL_DEBUG */
1102
1103 #ifdef TLSEXT_TYPE_opaque_prf_input
1104         if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1105             s->s3->client_opaque_prf_input_len > 0 &&
1106             s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1107                 {
1108                 co = s->s3->client_opaque_prf_input;
1109                 col = s->s3->server_opaque_prf_input_len;
1110                 so = s->s3->server_opaque_prf_input;
1111                 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) */
1112                 }
1113 #endif
1114
1115         tls1_PRF(ssl_get_algorithm2(s),
1116                 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1117                 s->s3->client_random,SSL3_RANDOM_SIZE,
1118                 co, col,
1119                 s->s3->server_random,SSL3_RANDOM_SIZE,
1120                 so, sol,
1121                 p,len,
1122                 s->session->master_key,buff,sizeof buff);
1123 #ifdef SSL_DEBUG
1124         fprintf(stderr, "Premaster Secret:\n");
1125         BIO_dump_fp(stderr, (char *)p, len);
1126         fprintf(stderr, "Client Random:\n");
1127         BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1128         fprintf(stderr, "Server Random:\n");
1129         BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1130         fprintf(stderr, "Master Secret:\n");
1131         BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
1132 #endif
1133
1134 #ifdef OPENSSL_SSL_TRACE_CRYPTO
1135         if (s->msg_callback)
1136                 {
1137                 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER,
1138                                                 p, len, s, s->msg_callback_arg);
1139                 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM,
1140                                         s->s3->client_random, SSL3_RANDOM_SIZE,
1141                                                 s, s->msg_callback_arg);
1142                 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM,
1143                                         s->s3->server_random, SSL3_RANDOM_SIZE,
1144                                         s, s->msg_callback_arg);
1145                 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER,
1146                                         s->session->master_key,
1147                                         SSL3_MASTER_SECRET_SIZE,
1148                                         s, s->msg_callback_arg);
1149                 }
1150 #endif
1151
1152 #ifdef KSSL_DEBUG
1153         printf ("tls1_generate_master_secret() complete\n");
1154 #endif  /* KSSL_DEBUG */
1155         return(SSL3_MASTER_SECRET_SIZE);
1156         }
1157
1158 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1159          const char *label, size_t llen, const unsigned char *context,
1160          size_t contextlen, int use_context)
1161         {
1162         unsigned char *buff;
1163         unsigned char *val = NULL;
1164         size_t vallen, currentvalpos;
1165         int rv;
1166
1167 #ifdef KSSL_DEBUG
1168         printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, context, contextlen);
1169 #endif  /* KSSL_DEBUG */
1170
1171         buff = OPENSSL_malloc(olen);
1172         if (buff == NULL) goto err2;
1173
1174         /* construct PRF arguments
1175          * we construct the PRF argument ourself rather than passing separate
1176          * values into the TLS PRF to ensure that the concatenation of values
1177          * does not create a prohibited label.
1178          */
1179         vallen = llen + SSL3_RANDOM_SIZE * 2;
1180         if (use_context)
1181                 {
1182                 vallen += 2 + contextlen;
1183                 }
1184
1185         val = OPENSSL_malloc(vallen);
1186         if (val == NULL) goto err2;
1187         currentvalpos = 0;
1188         memcpy(val + currentvalpos, (unsigned char *) label, llen);
1189         currentvalpos += llen;
1190         memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1191         currentvalpos += SSL3_RANDOM_SIZE;
1192         memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1193         currentvalpos += SSL3_RANDOM_SIZE;
1194
1195         if (use_context)
1196                 {
1197                 val[currentvalpos] = (contextlen >> 8) & 0xff;
1198                 currentvalpos++;
1199                 val[currentvalpos] = contextlen & 0xff;
1200                 currentvalpos++;
1201                 if ((contextlen > 0) || (context != NULL))
1202                         {
1203                         memcpy(val + currentvalpos, context, contextlen);
1204                         }
1205                 }
1206
1207         /* disallow prohibited labels
1208          * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
1209          * 15, so size of val > max(prohibited label len) = 15 and the
1210          * comparisons won't have buffer overflow
1211          */
1212         if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1213                  TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1;
1214         if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1215                  TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1;
1216         if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1217                  TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1;
1218         if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1219                  TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1;
1220
1221         rv = tls1_PRF(ssl_get_algorithm2(s),
1222                       val, vallen,
1223                       NULL, 0,
1224                       NULL, 0,
1225                       NULL, 0,
1226                       NULL, 0,
1227                       s->session->master_key,s->session->master_key_length,
1228                       out,buff,olen);
1229
1230 #ifdef KSSL_DEBUG
1231         printf ("tls1_export_keying_material() complete\n");
1232 #endif  /* KSSL_DEBUG */
1233         goto ret;
1234 err1:
1235         SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1236         rv = 0;
1237         goto ret;
1238 err2:
1239         SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1240         rv = 0;
1241 ret:
1242         if (buff != NULL) OPENSSL_free(buff);
1243         if (val != NULL) OPENSSL_free(val);
1244         return(rv);
1245         }
1246
1247 int tls1_alert_code(int code)
1248         {
1249         switch (code)
1250                 {
1251         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
1252         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1253         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
1254         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
1255         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
1256         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1257         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
1258         case SSL_AD_NO_CERTIFICATE:     return(-1);
1259         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
1260         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1261         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1262         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1263         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1264         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
1265         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
1266         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
1267         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
1268         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
1269         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1270         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
1271         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1272         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
1273         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
1274         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
1275         case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1276         case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1277         case SSL_AD_UNRECOGNIZED_NAME:  return(TLS1_AD_UNRECOGNIZED_NAME);
1278         case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1279         case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1280         case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1281         case SSL_AD_INAPPROPRIATE_FALLBACK:return(TLS1_AD_INAPPROPRIATE_FALLBACK);
1282 #if 0 /* not appropriate for TLS, not used for DTLS */
1283         case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1284                                           (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1285 #endif
1286         default:                        return(-1);
1287                 }
1288         }