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;
 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_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
 175         EVP_MD_CTX_set_flags(&ctx_tmp, 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,NULL,md, NULL, mac_key))
 180                 goto err;
 181         if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
 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_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
 200                         goto err;
 201                 if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
 202                         goto err;
 203                 if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
 204                         goto err;
 205                 if (!EVP_DigestSignUpdate(&ctx_tmp,A1,A1_len))
 206                         goto err;
 207                 if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
 208                         goto err;
 209                 if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
 210                         goto err;
 211                 if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
 212                         goto err;
 213                 if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
 214                         goto err;
 215                 if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
 216                         goto err;
 217
 218                 if (olen > chunk)
 219                         {
 220                         if (!EVP_DigestSignFinal(&ctx,out,&j))
 221                                 goto err;
 222                         out+=j;
 223                         olen-=j;
 224                         /* calc the next A1 value */
 225                         if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
 226                                 goto err;
 227                         }
 228                 else    /* last one */
 229                         {
 230                         if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
 231                                 goto err;
 232                         memcpy(out,A1,olen);
 233                         break;
 234                         }
 235                 }
 236         ret = 1;
 237 err:
 238         EVP_PKEY_free(mac_key);
 239         EVP_MD_CTX_cleanup(&ctx);
 240         EVP_MD_CTX_cleanup(&ctx_tmp);
 241         OPENSSL_cleanse(A1,sizeof(A1));
 242         return ret;
 243         }
 244
 245 /* seed1 through seed5 are virtually concatenated */
 246 static int tls1_PRF(long digest_mask,
 247                      const void *seed1, int seed1_len,
 248                      const void *seed2, int seed2_len,
 249                      const void *seed3, int seed3_len,
 250                      const void *seed4, int seed4_len,
 251                      const void *seed5, int seed5_len,
 252                      const unsigned char *sec, int slen,
 253                      unsigned char *out1,
 254                      unsigned char *out2, int olen)
 255         {
 256         int len,i,idx,count;
 257         const unsigned char *S1;
 258         long m;
 259         const EVP_MD *md;
 260         int ret = 0;
 261
 262         /* Count number of digests and partition sec evenly */
 263         count=0;
 264         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 265                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
 266         }
 267         len=slen/count;
 268         if (count == 1)
 269                 slen = 0;
 270         S1=sec;
 271         memset(out1,0,olen);
 272         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 273                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
 274                         if (!md) {
 275                                 SSLerr(SSL_F_TLS1_PRF,
 276                                 SSL_R_UNSUPPORTED_DIGEST_TYPE);
 277                                 goto err;
 278                         }
 279                         if (!tls1_P_hash(md ,S1,len+(slen&1),
 280                                         seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
 281                                         out2,olen))
 282                                 goto err;
 283                         S1+=len;
 284                         for (i=0; i<olen; i++)
 285                         {
 286                                 out1[i]^=out2[i];
 287                         }
 288                 }
 289         }
 290         ret = 1;
 291 err:
 292         return ret;
 293 }
 294 static int tls1_generate_key_block(SSL *s, unsigned char *km,
 295              unsigned char *tmp, int num)
 296         {
 297         int ret;
 298         ret = tls1_PRF(ssl_get_algorithm2(s),
 299                  TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
 300                  s->s3->server_random,SSL3_RANDOM_SIZE,
 301                  s->s3->client_random,SSL3_RANDOM_SIZE,
 302                  NULL,0,NULL,0,
 303                  s->session->master_key,s->session->master_key_length,
 304                  km,tmp,num);
 305 #ifdef KSSL_DEBUG
 306         printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
 307                 s->session->master_key_length);
 308         {
 309         int i;
 310         for (i=0; i < s->session->master_key_length; i++)
 311                 {
 312                 printf("%02X", s->session->master_key[i]);
 313                 }
 314         printf("\n");  }
 315 #endif    /* KSSL_DEBUG */
 316         return ret;
 317         }
 318
 319 int tls1_change_cipher_state(SSL *s, int which)
 320         {
 321         static const unsigned char empty[]="";
 322         unsigned char *p,*mac_secret;
 323         unsigned char *exp_label;
 324         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
 325         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
 326         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
 327         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
 328         unsigned char *ms,*key,*iv;
 329         int client_write;
 330         EVP_CIPHER_CTX *dd;
 331         const EVP_CIPHER *c;
 332 #ifndef OPENSSL_NO_COMP
 333         const SSL_COMP *comp;
 334 #endif
 335         const EVP_MD *m;
 336         int mac_type;
 337         int *mac_secret_size;
 338         EVP_MD_CTX *mac_ctx;
 339         EVP_PKEY *mac_key;
 340         int is_export,n,i,j,k,exp_label_len,cl;
 341         int reuse_dd = 0;
 342
 343         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
 344         c=s->s3->tmp.new_sym_enc;
 345         m=s->s3->tmp.new_hash;
 346         mac_type = s->s3->tmp.new_mac_pkey_type;
 347 #ifndef OPENSSL_NO_COMP
 348         comp=s->s3->tmp.new_compression;
 349 #endif
 350
 351 #ifdef KSSL_DEBUG
 352         printf("tls1_change_cipher_state(which= %d) w/\n", which);
 353         printf("\talg= %ld/%ld, comp= %p\n",
 354                s->s3->tmp.new_cipher->algorithm_mkey,
 355                s->s3->tmp.new_cipher->algorithm_auth,
 356                comp);
 357         printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
 358         printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
 359                 c->nid,c->block_size,c->key_len,c->iv_len);
 360         printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
 361         {
 362         int i;
 363         for (i=0; i<s->s3->tmp.key_block_length; i++)
 364                 printf("%02x", key_block[i]);  printf("\n");
 365         }
 366 #endif  /* KSSL_DEBUG */
 367
 368         if (which & SSL3_CC_READ)
 369                 {
 370                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 371                         s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
 372                 else
 373                         s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 374
 375                 if (s->enc_read_ctx != NULL)
 376                         reuse_dd = 1;
 377                 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 378                         goto err;
 379                 else
 380                         /* make sure it's intialized in case we exit later with an error */
 381                         EVP_CIPHER_CTX_init(s->enc_read_ctx);
 382                 dd= s->enc_read_ctx;
 383                 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
 384 #ifndef OPENSSL_NO_COMP
 385                 if (s->expand != NULL)
 386                         {
 387                         COMP_CTX_free(s->expand);
 388                         s->expand=NULL;
 389                         }
 390                 if (comp != NULL)
 391                         {
 392                         s->expand=COMP_CTX_new(comp->method);
 393                         if (s->expand == NULL)
 394                                 {
 395                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 396                                 goto err2;
 397                                 }
 398                         if (s->s3->rrec.comp == NULL)
 399                                 s->s3->rrec.comp=(unsigned char *)
 400                                         OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
 401                         if (s->s3->rrec.comp == NULL)
 402                                 goto err;
 403                         }
 404 #endif
 405                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 406                 if (s->version != DTLS1_VERSION)
 407                         memset(&(s->s3->read_sequence[0]),0,8);
 408                 mac_secret= &(s->s3->read_mac_secret[0]);
 409                 mac_secret_size=&(s->s3->read_mac_secret_size);
 410                 }
 411         else
 412                 {
 413                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 414                         s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
 415                         else
 416                         s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
 417                 if (s->enc_write_ctx != NULL)
 418                         reuse_dd = 1;
 419                 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 420                         goto err;
 421                 else
 422                         /* make sure it's intialized in case we exit later with an error */
 423                         EVP_CIPHER_CTX_init(s->enc_write_ctx);
 424                 dd= s->enc_write_ctx;
 425                 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
 426 #ifndef OPENSSL_NO_COMP
 427                 if (s->compress != NULL)
 428                         {
 429                         COMP_CTX_free(s->compress);
 430                         s->compress=NULL;
 431                         }
 432                 if (comp != NULL)
 433                         {
 434                         s->compress=COMP_CTX_new(comp->method);
 435                         if (s->compress == NULL)
 436                                 {
 437                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 438                                 goto err2;
 439                                 }
 440                         }
 441 #endif
 442                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 443                 if (s->version != DTLS1_VERSION)
 444                         memset(&(s->s3->write_sequence[0]),0,8);
 445                 mac_secret= &(s->s3->write_mac_secret[0]);
 446                 mac_secret_size = &(s->s3->write_mac_secret_size);
 447                 }
 448
 449         if (reuse_dd)
 450                 EVP_CIPHER_CTX_cleanup(dd);
 451
 452         p=s->s3->tmp.key_block;
 453         i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
 454
 455         cl=EVP_CIPHER_key_length(c);
 456         j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
 457                        cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
 458         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
 459         /* If GCM mode only part of IV comes from PRF */
 460         if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
 461                 k = EVP_GCM_TLS_FIXED_IV_LEN;
 462         else
 463                 k=EVP_CIPHER_iv_length(c);
 464         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 465                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
 466                 {
 467                 ms=  &(p[ 0]); n=i+i;
 468                 key= &(p[ n]); n+=j+j;
 469                 iv=  &(p[ n]); n+=k+k;
 470                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
 471                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
 472                 client_write=1;
 473                 }
 474         else
 475                 {
 476                 n=i;
 477                 ms=  &(p[ n]); n+=i+j;
 478                 key= &(p[ n]); n+=j+k;
 479                 iv=  &(p[ n]); n+=k;
 480                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
 481                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
 482                 client_write=0;
 483                 }
 484
 485         if (n > s->s3->tmp.key_block_length)
 486                 {
 487                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
 488                 goto err2;
 489                 }
 490
 491         memcpy(mac_secret,ms,i);
 492
 493         if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER))
 494                 {
 495                 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
 496                                 mac_secret,*mac_secret_size);
 497                 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
 498                 EVP_PKEY_free(mac_key);
 499                 }
 500 #ifdef TLS_DEBUG
 501 printf("which = %04X\nmac key=",which);
 502 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
 503 #endif
 504         if (is_export)
 505                 {
 506                 /* In here I set both the read and write key/iv to the
 507                  * same value since only the correct one will be used :-).
 508                  */
 509                 if (!tls1_PRF(ssl_get_algorithm2(s),
 510                                 exp_label,exp_label_len,
 511                                 s->s3->client_random,SSL3_RANDOM_SIZE,
 512                                 s->s3->server_random,SSL3_RANDOM_SIZE,
 513                                 NULL,0,NULL,0,
 514                                 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
 515                         goto err2;
 516                 key=tmp1;
 517
 518                 if (k > 0)
 519                         {
 520                         if (!tls1_PRF(ssl_get_algorithm2(s),
 521                                         TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
 522                                         s->s3->client_random,SSL3_RANDOM_SIZE,
 523                                         s->s3->server_random,SSL3_RANDOM_SIZE,
 524                                         NULL,0,NULL,0,
 525                                         empty,0,iv1,iv2,k*2))
 526                                 goto err2;
 527                         if (client_write)
 528                                 iv=iv1;
 529                         else
 530                                 iv= &(iv1[k]);
 531                         }
 532                 }
 533
 534         s->session->key_arg_length=0;
 535 #ifdef KSSL_DEBUG
 536         {
 537         int i;
 538         printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
 539         printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
 540         printf("\n");
 541         printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
 542         printf("\n");
 543         }
 544 #endif  /* KSSL_DEBUG */
 545
 546         if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
 547                 {
 548                 EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE));
 549                 EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
 550                 }
 551         else
 552                 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
 553
 554         /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
 555         if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
 556                 EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY,
 557                                 *mac_secret_size,mac_secret);
 558
 559 #ifdef TLS_DEBUG
 560 printf("which = %04X\nkey=",which);
 561 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
 562 printf("\niv=");
 563 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
 564 printf("\n");
 565 #endif
 566
 567         OPENSSL_cleanse(tmp1,sizeof(tmp1));
 568         OPENSSL_cleanse(tmp2,sizeof(tmp1));
 569         OPENSSL_cleanse(iv1,sizeof(iv1));
 570         OPENSSL_cleanse(iv2,sizeof(iv2));
 571         return(1);
 572 err:
 573         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
 574 err2:
 575         return(0);
 576         }
 577
 578 int tls1_setup_key_block(SSL *s)
 579         {
 580         unsigned char *p1,*p2=NULL;
 581         const EVP_CIPHER *c;
 582         const EVP_MD *hash;
 583         int num;
 584         SSL_COMP *comp;
 585         int mac_type= NID_undef,mac_secret_size=0;
 586         int ret=0;
 587
 588 #ifdef KSSL_DEBUG
 589         printf ("tls1_setup_key_block()\n");
 590 #endif  /* KSSL_DEBUG */
 591
 592         if (s->s3->tmp.key_block_length != 0)
 593                 return(1);
 594
 595         if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
 596                 {
 597                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 598                 return(0);
 599                 }
 600
 601         s->s3->tmp.new_sym_enc=c;
 602         s->s3->tmp.new_hash=hash;
 603         s->s3->tmp.new_mac_pkey_type = mac_type;
 604         s->s3->tmp.new_mac_secret_size = mac_secret_size;
 605         num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
 606         num*=2;
 607
 608         ssl3_cleanup_key_block(s);
 609
 610         if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 611                 {
 612                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 613                 goto err;
 614                 }
 615
 616         s->s3->tmp.key_block_length=num;
 617         s->s3->tmp.key_block=p1;
 618
 619         if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 620                 {
 621                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 622                 goto err;
 623                 }
 624
 625 #ifdef TLS_DEBUG
 626 printf("client random\n");
 627 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
 628 printf("server random\n");
 629 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
 630 printf("pre-master\n");
 631 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
 632 #endif
 633         if (!tls1_generate_key_block(s,p1,p2,num))
 634                 goto err;
 635 #ifdef TLS_DEBUG
 636 printf("\nkey block\n");
 637 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
 638 #endif
 639
 640         if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
 641                 && s->method->version <= TLS1_VERSION)
 642                 {
 643                 /* enable vulnerability countermeasure for CBC ciphers with
 644                  * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 645                  */
 646                 s->s3->need_empty_fragments = 1;
 647
 648                 if (s->session->cipher != NULL)
 649                         {
 650                         if (s->session->cipher->algorithm_enc == SSL_eNULL)
 651                                 s->s3->need_empty_fragments = 0;
 652
 653 #ifndef OPENSSL_NO_RC4
 654                         if (s->session->cipher->algorithm_enc == SSL_RC4)
 655                                 s->s3->need_empty_fragments = 0;
 656 #endif
 657                         }
 658                 }
 659
 660         ret = 1;
 661 err:
 662         if (p2)
 663                 {
 664                 OPENSSL_cleanse(p2,num);
 665                 OPENSSL_free(p2);
 666                 }
 667         return(ret);
 668         }
 669
 670 int tls1_enc(SSL *s, int send)
 671         {
 672         SSL3_RECORD *rec;
 673         EVP_CIPHER_CTX *ds;
 674         unsigned long l;
 675         int bs,i,ii,j,k,pad=0;
 676         const EVP_CIPHER *enc;
 677
 678         if (send)
 679                 {
 680                 if (EVP_MD_CTX_md(s->write_hash))
 681                         {
 682                         int n=EVP_MD_CTX_size(s->write_hash);
 683                         OPENSSL_assert(n >= 0);
 684                         }
 685                 ds=s->enc_write_ctx;
 686                 rec= &(s->s3->wrec);
 687                 if (s->enc_write_ctx == NULL)
 688                         enc=NULL;
 689                 else
 690                         {
 691                         int ivlen;
 692                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
 693                         /* For TLSv1.1 and later explicit IV */
 694                         if (s->version >= TLS1_1_VERSION
 695                                 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
 696                                 ivlen = EVP_CIPHER_iv_length(enc);
 697                         else
 698                                 ivlen = 0;
 699                         if (ivlen > 1)
 700                                 {
 701                                 if ( rec->data != rec->input)
 702                                         /* we can't write into the input stream:
 703                                          * Can this ever happen?? (steve)
 704                                          */
 705                                         fprintf(stderr,
 706                                                 "%s:%d: rec->data != rec->input\n",
 707                                                 __FILE__, __LINE__);
 708                                 else if (RAND_bytes(rec->input, ivlen) <= 0)
 709                                         return -1;
 710                                 }
 711                         }
 712                 }
 713         else
 714                 {
 715                 if (EVP_MD_CTX_md(s->read_hash))
 716                         {
 717                         int n=EVP_MD_CTX_size(s->read_hash);
 718                         OPENSSL_assert(n >= 0);
 719                         }
 720                 ds=s->enc_read_ctx;
 721                 rec= &(s->s3->rrec);
 722                 if (s->enc_read_ctx == NULL)
 723                         enc=NULL;
 724                 else
 725                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
 726                 }
 727
 728 #ifdef KSSL_DEBUG
 729         printf("tls1_enc(%d)\n", send);
 730 #endif    /* KSSL_DEBUG */
 731
 732         if ((s->session == NULL) || (ds == NULL) ||
 733                 (enc == NULL))
 734                 {
 735                 memmove(rec->data,rec->input,rec->length);
 736                 rec->input=rec->data;
 737                 }
 738         else
 739                 {
 740                 l=rec->length;
 741                 bs=EVP_CIPHER_block_size(ds->cipher);
 742
 743                 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
 744                         {
 745                         unsigned char buf[13],*seq;
 746
 747                         seq = send?s->s3->write_sequence:s->s3->read_sequence;
 748
 749                         if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
 750                                 {
 751                                 unsigned char dtlsseq[9],*p=dtlsseq;
 752
 753                                 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
 754                                 memcpy(p,&seq[2],6);
 755                                 memcpy(buf,dtlsseq,8);
 756                                 }
 757                         else
 758                                 {
 759                                 memcpy(buf,seq,8);
 760                                 for (i=7; i>=0; i--)    /* increment */
 761                                         {
 762                                         ++seq[i];
 763                                         if (seq[i] != 0) break;
 764                                         }
 765                                 }
 766
 767                         buf[8]=rec->type;
 768                         buf[9]=(unsigned char)(s->version>>8);
 769                         buf[10]=(unsigned char)(s->version);
 770                         buf[11]=rec->length>>8;
 771                         buf[12]=rec->length&0xff;
 772                         pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
 773                         if (send)
 774                                 {
 775                                 l+=pad;
 776                                 rec->length+=pad;
 777                                 }
 778                         }
 779                 else if ((bs != 1) && send)
 780                         {
 781                         i=bs-((int)l%bs);
 782
 783                         /* Add weird padding of upto 256 bytes */
 784
 785                         /* we need to add 'i' padding bytes of value j */
 786                         j=i-1;
 787                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
 788                                 {
 789                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 790                                         j++;
 791                                 }
 792                         for (k=(int)l; k<(int)(l+i); k++)
 793                                 rec->input[k]=j;
 794                         l+=i;
 795                         rec->length+=i;
 796                         }
 797
 798 #ifdef KSSL_DEBUG
 799                 {
 800                 unsigned long ui;
 801                 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
 802                         ds,rec->data,rec->input,l);
 803                 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
 804                         ds->buf_len, ds->cipher->key_len,
 805                         DES_KEY_SZ, DES_SCHEDULE_SZ,
 806                         ds->cipher->iv_len);
 807                 printf("\t\tIV: ");
 808                 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
 809                 printf("\n");
 810                 printf("\trec->input=");
 811                 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
 812                 printf("\n");
 813                 }
 814 #endif  /* KSSL_DEBUG */
 815
 816                 if (!send)
 817                         {
 818                         if (l == 0 || l%bs != 0)
 819                                 {
 820                                 if (s->version >= TLS1_1_VERSION)
 821                                         return -1;
 822                                 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
 823                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
 824                                 return 0;
 825                                 }
 826                         }
 827
 828                 if (EVP_Cipher(ds,rec->data,rec->input,l) < 0)
 829                         return -1;      /* AEAD can fail to verify MAC */
 830                 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
 831                         {
 832                         rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 833                         rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
 834                         rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
 835                         }
 836
 837 #ifdef KSSL_DEBUG
 838                 {
 839                 unsigned long i;
 840                 printf("\trec->data=");
 841                 for (i=0; i<l; i++)
 842                         printf(" %02x", rec->data[i]);  printf("\n");
 843                 }
 844 #endif  /* KSSL_DEBUG */
 845
 846                 if ((bs != 1) && !send)
 847                         {
 848                         ii=i=rec->data[l-1]; /* padding_length */
 849                         i++;
 850                         /* NB: if compression is in operation the first packet
 851                          * may not be of even length so the padding bug check
 852                          * cannot be performed. This bug workaround has been
 853                          * around since SSLeay so hopefully it is either fixed
 854                          * now or no buggy implementation supports compression
 855                          * [steve]
 856                          */
 857                         if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
 858                                 && !s->expand)
 859                                 {
 860                                 /* First packet is even in size, so check */
 861                                 if ((memcmp(s->s3->read_sequence,
 862                                         "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
 863                                         s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
 864                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 865                                         i--;
 866                                 }
 867                         /* TLS 1.0 does not bound the number of padding bytes by the block size.
 868                          * All of them must have value 'padding_length'. */
 869                         if (i > (int)rec->length)
 870                                 {
 871                                 /* Incorrect padding. SSLerr() and ssl3_alert are done
 872                                  * by caller: we don't want to reveal whether this is
 873                                  * a decryption error or a MAC verification failure
 874                                  * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
 875                                 return -1;
 876                                 }
 877                         for (j=(int)(l-i); j<(int)l; j++)
 878                                 {
 879                                 if (rec->data[j] != ii)
 880                                         {
 881                                         /* Incorrect padding */
 882                                         return -1;
 883                                         }
 884                                 }
 885                         rec->length -=i;
 886                         if (s->version >= TLS1_1_VERSION
 887                                 && EVP_CIPHER_CTX_mode(ds) == EVP_CIPH_CBC_MODE)
 888                                 {
 889                                 rec->data += bs;    /* skip the explicit IV */
 890                                 rec->input += bs;
 891                                 rec->length -= bs;
 892                                 }
 893                         }
 894                 if (pad && !send)
 895                         rec->length -= pad;
 896                 }
 897         return(1);
 898         }
 899 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
 900         {
 901         unsigned int ret;
 902         EVP_MD_CTX ctx, *d=NULL;
 903         int i;
 904
 905         if (s->s3->handshake_buffer)
 906                 if (!ssl3_digest_cached_records(s))
 907                         return 0;
 908
 909         for (i=0;i<SSL_MAX_DIGEST;i++)
 910                 {
 911                   if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
 912                         {
 913                         d=s->s3->handshake_dgst[i];
 914                         break;
 915                         }
 916                 }
 917         if (!d) {
 918                 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
 919                 return 0;
 920         }
 921
 922         EVP_MD_CTX_init(&ctx);
 923         EVP_MD_CTX_copy_ex(&ctx,d);
 924         EVP_DigestFinal_ex(&ctx,out,&ret);
 925         EVP_MD_CTX_cleanup(&ctx);
 926         return((int)ret);
 927         }
 928
 929 int tls1_final_finish_mac(SSL *s,
 930              const char *str, int slen, unsigned char *out)
 931         {
 932         unsigned int i;
 933         EVP_MD_CTX ctx;
 934         unsigned char buf[2*EVP_MAX_MD_SIZE];
 935         unsigned char *q,buf2[12];
 936         int idx;
 937         long mask;
 938         int err=0;
 939         const EVP_MD *md;
 940
 941         q=buf;
 942
 943         if (s->s3->handshake_buffer)
 944                 if (!ssl3_digest_cached_records(s))
 945                         return 0;
 946
 947         EVP_MD_CTX_init(&ctx);
 948
 949         for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
 950                 {
 951                 if (mask & ssl_get_algorithm2(s))
 952                         {
 953                         int hashsize = EVP_MD_size(md);
 954                         if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
 955                                 {
 956                                 /* internal error: 'buf' is too small for this cipersuite! */
 957                                 err = 1;
 958                                 }
 959                         else
 960                                 {
 961                                 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
 962                                 EVP_DigestFinal_ex(&ctx,q,&i);
 963                                 if (i != (unsigned int)hashsize) /* can't really happen */
 964                                         err = 1;
 965                                 q+=i;
 966                                 }
 967                         }
 968                 }
 969
 970         if (!tls1_PRF(ssl_get_algorithm2(s),
 971                         str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
 972                         s->session->master_key,s->session->master_key_length,
 973                         out,buf2,sizeof buf2))
 974                 err = 1;
 975         EVP_MD_CTX_cleanup(&ctx);
 976
 977         if (err)
 978                 return 0;
 979         else
 980                 return sizeof buf2;
 981         }
 982
 983 int tls1_mac(SSL *ssl, unsigned char *md, int send)
 984         {
 985         SSL3_RECORD *rec;
 986         unsigned char *seq;
 987         EVP_MD_CTX *hash;
 988         size_t md_size;
 989         int i;
 990         EVP_MD_CTX hmac, *mac_ctx;
 991         unsigned char buf[5];
 992         int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
 993         int t;
 994
 995         if (send)
 996                 {
 997                 rec= &(ssl->s3->wrec);
 998                 seq= &(ssl->s3->write_sequence[0]);
 999                 hash=ssl->write_hash;
1000                 }
1001         else
1002                 {
1003                 rec= &(ssl->s3->rrec);
1004                 seq= &(ssl->s3->read_sequence[0]);
1005                 hash=ssl->read_hash;
1006                 }
1007
1008         t=EVP_MD_CTX_size(hash);
1009         OPENSSL_assert(t >= 0);
1010         md_size=t;
1011
1012         buf[0]=rec->type;
1013         buf[1]=(unsigned char)(ssl->version>>8);
1014         buf[2]=(unsigned char)(ssl->version);
1015         buf[3]=rec->length>>8;
1016         buf[4]=rec->length&0xff;
1017
1018         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
1019         if (stream_mac)
1020                 {
1021                         mac_ctx = hash;
1022                 }
1023                 else
1024                 {
1025                         EVP_MD_CTX_copy(&hmac,hash);
1026                         mac_ctx = &hmac;
1027                 }
1028
1029         if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
1030                 {
1031                 unsigned char dtlsseq[8],*p=dtlsseq;
1032
1033                 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
1034                 memcpy (p,&seq[2],6);
1035
1036                 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
1037                 }
1038         else
1039                 EVP_DigestSignUpdate(mac_ctx,seq,8);
1040
1041         EVP_DigestSignUpdate(mac_ctx,buf,5);
1042         EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
1043         t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
1044         OPENSSL_assert(t > 0);
1045
1046         if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
1047 #ifdef TLS_DEBUG
1048 printf("sec=");
1049 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
1050 printf("seq=");
1051 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
1052 printf("buf=");
1053 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
1054 printf("rec=");
1055 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
1056 #endif
1057
1058         if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
1059                 {
1060                 for (i=7; i>=0; i--)
1061                         {
1062                         ++seq[i];
1063                         if (seq[i] != 0) break;
1064                         }
1065                 }
1066
1067 #ifdef TLS_DEBUG
1068 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
1069 #endif
1070         return(md_size);
1071         }
1072
1073 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1074              int len)
1075         {
1076         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1077         const void *co = NULL, *so = NULL;
1078         int col = 0, sol = 0;
1079
1080
1081 #ifdef KSSL_DEBUG
1082         printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1083 #endif  /* KSSL_DEBUG */
1084
1085 #ifdef TLSEXT_TYPE_opaque_prf_input
1086         if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1087             s->s3->client_opaque_prf_input_len > 0 &&
1088             s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1089                 {
1090                 co = s->s3->client_opaque_prf_input;
1091                 col = s->s3->server_opaque_prf_input_len;
1092                 so = s->s3->server_opaque_prf_input;
1093                 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) */
1094                 }
1095 #endif
1096
1097         tls1_PRF(ssl_get_algorithm2(s),
1098                 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1099                 s->s3->client_random,SSL3_RANDOM_SIZE,
1100                 co, col,
1101                 s->s3->server_random,SSL3_RANDOM_SIZE,
1102                 so, sol,
1103                 p,len,
1104                 s->session->master_key,buff,sizeof buff);
1105 #ifdef SSL_DEBUG
1106         fprintf(stderr, "Premaster Secret:\n");
1107         BIO_dump_fp(stderr, (char *)p, len);
1108         fprintf(stderr, "Client Random:\n");
1109         BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1110         fprintf(stderr, "Server Random:\n");
1111         BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1112         fprintf(stderr, "Master Secret:\n");
1113         BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
1114 #endif
1115
1116 #ifdef KSSL_DEBUG
1117         printf ("tls1_generate_master_secret() complete\n");
1118 #endif  /* KSSL_DEBUG */
1119         return(SSL3_MASTER_SECRET_SIZE);
1120         }
1121
1122 int tls1_export_keying_material(SSL *s, unsigned char *out, unsigned int olen,
1123          const char *label, unsigned int llen, const unsigned char *context,
1124          unsigned int contextlen, int use_context)
1125         {
1126         unsigned char *buff;
1127         unsigned char *val;
1128         unsigned int vallen, currentvalpos, rv;
1129
1130 #ifdef KSSL_DEBUG
1131         printf ("tls1_export_keying_material(%p, %p,%d, %s,%d, %p,%d)\n", s, out,olen, label,llen, p,plen);
1132 #endif  /* KSSL_DEBUG */
1133
1134         buff = OPENSSL_malloc(olen);
1135         if (buff == NULL) goto err2;
1136
1137         /* construct PRF arguments
1138          * we construct the PRF argument ourself rather than passing separate
1139          * values into the TLS PRF to ensure that the concatenation of values
1140          * does not create a prohibited label.
1141          */
1142         vallen = llen + SSL3_RANDOM_SIZE * 2;
1143         if (use_context)
1144                 {
1145                 vallen +=  2 + contextlen;
1146                 }
1147
1148         val = OPENSSL_malloc(vallen);
1149         if (val == NULL) goto err2;
1150         currentvalpos = 0;
1151         memcpy(val + currentvalpos, (unsigned char *) label, llen);
1152         currentvalpos += llen;
1153         memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1154         currentvalpos += SSL3_RANDOM_SIZE;
1155         memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1156         currentvalpos += SSL3_RANDOM_SIZE;
1157
1158         if (use_context)
1159                 {
1160                 val[currentvalpos] = (contextlen << 8) & 0xff;
1161                 currentvalpos++;
1162                 val[currentvalpos] = contextlen & 0xff;
1163                 currentvalpos++;
1164                 if ((contextlen > 0) || (context != NULL))
1165                         {
1166                         memcpy(val + currentvalpos, context, contextlen);
1167                         }
1168                 }
1169
1170         /* disallow prohibited labels
1171          * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
1172          * 15, so size of val > max(prohibited label len) = 15 and the
1173          * comparisons won't have buffer overflow
1174          */
1175         if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1176                  TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1;
1177         if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1178                  TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1;
1179         if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1180                  TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1;
1181         if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1182                  TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1;
1183
1184         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
1185                 val, vallen,
1186                 NULL, 0,
1187                 NULL, 0,
1188                 NULL, 0,
1189                 NULL, 0,
1190                 s->session->master_key,s->session->master_key_length,
1191                 out,buff,olen);
1192
1193 #ifdef KSSL_DEBUG
1194         printf ("tls1_export_keying_material() complete\n");
1195 #endif  /* KSSL_DEBUG */
1196         rv = olen;
1197         goto ret;
1198 err1:
1199         SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1200         rv = 0;
1201         goto ret;
1202 err2:
1203         SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1204         rv = 0;
1205 ret:
1206         if (buff != NULL) OPENSSL_free(buff);
1207         if (val != NULL) OPENSSL_free(val);
1208         return(rv);
1209         }
1210
1211 int tls1_alert_code(int code)
1212         {
1213         switch (code)
1214                 {
1215         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
1216         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1217         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
1218         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
1219         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
1220         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1221         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
1222         case SSL_AD_NO_CERTIFICATE:     return(-1);
1223         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
1224         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1225         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1226         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1227         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1228         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
1229         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
1230         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
1231         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
1232         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
1233         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1234         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
1235         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1236         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
1237         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
1238         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
1239         case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1240         case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1241         case SSL_AD_UNRECOGNIZED_NAME:  return(TLS1_AD_UNRECOGNIZED_NAME);
1242         case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1243         case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1244         case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1245 #if 0 /* not appropriate for TLS, not used for DTLS */
1246         case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1247                                           (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1248 #endif
1249         default:                        return(-1);
1250                 }
1251         }
1252
1253 int SSL_tls1_key_exporter(SSL *s, unsigned char *label, int label_len,
1254                            unsigned char *context, int context_len,
1255                            unsigned char *out, int olen)
1256         {
1257         unsigned char *tmp;
1258         int rv;
1259
1260         tmp = OPENSSL_malloc(olen);
1261
1262         if (!tmp)
1263                 return 0;
1264
1265         rv = tls1_PRF(ssl_get_algorithm2(s),
1266                          label, label_len,
1267                          s->s3->client_random,SSL3_RANDOM_SIZE,
1268                          s->s3->server_random,SSL3_RANDOM_SIZE,
1269                          context, context_len, NULL, 0,
1270                          s->session->master_key, s->session->master_key_length,
1271                          out, tmp, olen);
1272
1273         OPENSSL_free(tmp);
1274         return rv;
1275         }