crypto/openssl/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 #ifdef KSSL_DEBUG
 147 #include <openssl/des.h>
 148 #endif
 149
 150 /* seed1 through seed5 are virtually concatenated */
 151 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
 152                         int sec_len,
 153                         const void *seed1, int seed1_len,
 154                         const void *seed2, int seed2_len,
 155                         const void *seed3, int seed3_len,
 156                         const void *seed4, int seed4_len,
 157                         const void *seed5, int seed5_len,
 158                         unsigned char *out, int olen)
 159         {
 160         int chunk,n;
 161         unsigned int j;
 162         HMAC_CTX ctx;
 163         HMAC_CTX ctx_tmp;
 164         unsigned char A1[EVP_MAX_MD_SIZE];
 165         unsigned int A1_len;
 166         int ret = 0;
 167
 168         chunk=EVP_MD_size(md);
 169         OPENSSL_assert(chunk >= 0);
 170
 171         HMAC_CTX_init(&ctx);
 172         HMAC_CTX_init(&ctx_tmp);
 173         if (!HMAC_Init_ex(&ctx,sec,sec_len,md, NULL))
 174                 goto err;
 175         if (!HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL))
 176                 goto err;
 177         if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
 178                 goto err;
 179         if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
 180                 goto err;
 181         if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
 182                 goto err;
 183         if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
 184                 goto err;
 185         if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
 186                 goto err;
 187         if (!HMAC_Final(&ctx,A1,&A1_len))
 188                 goto err;
 189
 190         n=0;
 191         for (;;)
 192                 {
 193                 if (!HMAC_Init_ex(&ctx,NULL,0,NULL,NULL)) /* re-init */
 194                         goto err;
 195                 if (!HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL)) /* re-init */
 196                         goto err;
 197                 if (!HMAC_Update(&ctx,A1,A1_len))
 198                         goto err;
 199                 if (!HMAC_Update(&ctx_tmp,A1,A1_len))
 200                         goto err;
 201                 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
 202                         goto err;
 203                 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
 204                         goto err;
 205                 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
 206                         goto err;
 207                 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
 208                         goto err;
 209                 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
 210                         goto err;
 211
 212                 if (olen > chunk)
 213                         {
 214                         if (!HMAC_Final(&ctx,out,&j))
 215                                 goto err;
 216                         out+=j;
 217                         olen-=j;
 218                         if (!HMAC_Final(&ctx_tmp,A1,&A1_len)) /* calc the next A1 value */
 219                                 goto err;
 220                         }
 221                 else    /* last one */
 222                         {
 223                         if (!HMAC_Final(&ctx,A1,&A1_len))
 224                                 goto err;
 225                         memcpy(out,A1,olen);
 226                         break;
 227                         }
 228                 }
 229         ret = 1;
 230 err:
 231         HMAC_CTX_cleanup(&ctx);
 232         HMAC_CTX_cleanup(&ctx_tmp);
 233         OPENSSL_cleanse(A1,sizeof(A1));
 234         return ret;
 235         }
 236
 237 /* seed1 through seed5 are virtually concatenated */
 238 static int tls1_PRF(long digest_mask,
 239                      const void *seed1, int seed1_len,
 240                      const void *seed2, int seed2_len,
 241                      const void *seed3, int seed3_len,
 242                      const void *seed4, int seed4_len,
 243                      const void *seed5, int seed5_len,
 244                      const unsigned char *sec, int slen,
 245                      unsigned char *out1,
 246                      unsigned char *out2, int olen)
 247         {
 248         int len,i,idx,count;
 249         const unsigned char *S1;
 250         long m;
 251         const EVP_MD *md;
 252         int ret = 0;
 253
 254         /* Count number of digests and partition sec evenly */
 255         count=0;
 256         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 257                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
 258         }
 259         len=slen/count;
 260         S1=sec;
 261         memset(out1,0,olen);
 262         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 263                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
 264                         if (!md) {
 265                                 SSLerr(SSL_F_TLS1_PRF,
 266                                 SSL_R_UNSUPPORTED_DIGEST_TYPE);
 267                                 goto err;
 268                         }
 269                         if (!tls1_P_hash(md ,S1,len+(slen&1),
 270                                         seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
 271                                         out2,olen))
 272                                 goto err;
 273                         S1+=len;
 274                         for (i=0; i<olen; i++)
 275                         {
 276                                 out1[i]^=out2[i];
 277                         }
 278                 }
 279         }
 280         ret = 1;
 281 err:
 282         return ret;
 283 }
 284 static int tls1_generate_key_block(SSL *s, unsigned char *km,
 285              unsigned char *tmp, int num)
 286         {
 287         int ret;
 288         ret = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 289                  TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
 290                  s->s3->server_random,SSL3_RANDOM_SIZE,
 291                  s->s3->client_random,SSL3_RANDOM_SIZE,
 292                  NULL,0,NULL,0,
 293                  s->session->master_key,s->session->master_key_length,
 294                  km,tmp,num);
 295 #ifdef KSSL_DEBUG
 296         printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
 297                 s->session->master_key_length);
 298         {
 299         int i;
 300         for (i=0; i < s->session->master_key_length; i++)
 301                 {
 302                 printf("%02X", s->session->master_key[i]);
 303                 }
 304         printf("\n");  }
 305 #endif    /* KSSL_DEBUG */
 306         return ret;
 307         }
 308
 309 int tls1_change_cipher_state(SSL *s, int which)
 310         {
 311         static const unsigned char empty[]="";
 312         unsigned char *p,*key_block,*mac_secret;
 313         unsigned char *exp_label;
 314         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
 315         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
 316         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
 317         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
 318         unsigned char *ms,*key,*iv,*er1,*er2;
 319         int client_write;
 320         EVP_CIPHER_CTX *dd;
 321         const EVP_CIPHER *c;
 322 #ifndef OPENSSL_NO_COMP
 323         const SSL_COMP *comp;
 324 #endif
 325         const EVP_MD *m;
 326         int mac_type;
 327         int *mac_secret_size;
 328         EVP_MD_CTX *mac_ctx;
 329         EVP_PKEY *mac_key;
 330         int is_export,n,i,j,k,exp_label_len,cl;
 331         int reuse_dd = 0;
 332
 333         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
 334         c=s->s3->tmp.new_sym_enc;
 335         m=s->s3->tmp.new_hash;
 336         mac_type = s->s3->tmp.new_mac_pkey_type;
 337 #ifndef OPENSSL_NO_COMP
 338         comp=s->s3->tmp.new_compression;
 339 #endif
 340         key_block=s->s3->tmp.key_block;
 341
 342 #ifdef KSSL_DEBUG
 343         printf("tls1_change_cipher_state(which= %d) w/\n", which);
 344         printf("\talg= %ld/%ld, comp= %p\n",
 345                s->s3->tmp.new_cipher->algorithm_mkey,
 346                s->s3->tmp.new_cipher->algorithm_auth,
 347                comp);
 348         printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
 349         printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
 350                 c->nid,c->block_size,c->key_len,c->iv_len);
 351         printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
 352         {
 353         int i;
 354         for (i=0; i<s->s3->tmp.key_block_length; i++)
 355                 printf("%02x", key_block[i]);  printf("\n");
 356         }
 357 #endif  /* KSSL_DEBUG */
 358
 359         if (which & SSL3_CC_READ)
 360                 {
 361                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 362                         s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
 363                         else
 364                         s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 365
 366                 if (s->enc_read_ctx != NULL)
 367                         reuse_dd = 1;
 368                 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 369                         goto err;
 370                 else
 371                         /* make sure it's intialized in case we exit later with an error */
 372                         EVP_CIPHER_CTX_init(s->enc_read_ctx);
 373                 dd= s->enc_read_ctx;
 374                 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
 375 #ifndef OPENSSL_NO_COMP
 376                 if (s->expand != NULL)
 377                         {
 378                         COMP_CTX_free(s->expand);
 379                         s->expand=NULL;
 380                         }
 381                 if (comp != NULL)
 382                         {
 383                         s->expand=COMP_CTX_new(comp->method);
 384                         if (s->expand == NULL)
 385                                 {
 386                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 387                                 goto err2;
 388                                 }
 389                         if (s->s3->rrec.comp == NULL)
 390                                 s->s3->rrec.comp=(unsigned char *)
 391                                         OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
 392                         if (s->s3->rrec.comp == NULL)
 393                                 goto err;
 394                         }
 395 #endif
 396                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 397                 if (s->version != DTLS1_VERSION)
 398                         memset(&(s->s3->read_sequence[0]),0,8);
 399                 mac_secret= &(s->s3->read_mac_secret[0]);
 400                 mac_secret_size=&(s->s3->read_mac_secret_size);
 401                 }
 402         else
 403                 {
 404                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 405                         s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
 406                         else
 407                         s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
 408                 if (s->enc_write_ctx != NULL)
 409                         reuse_dd = 1;
 410                 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 411                         goto err;
 412                 else
 413                         /* make sure it's intialized in case we exit later with an error */
 414                         EVP_CIPHER_CTX_init(s->enc_write_ctx);
 415                 dd= s->enc_write_ctx;
 416                 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
 417 #ifndef OPENSSL_NO_COMP
 418                 if (s->compress != NULL)
 419                         {
 420                         COMP_CTX_free(s->compress);
 421                         s->compress=NULL;
 422                         }
 423                 if (comp != NULL)
 424                         {
 425                         s->compress=COMP_CTX_new(comp->method);
 426                         if (s->compress == NULL)
 427                                 {
 428                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 429                                 goto err2;
 430                                 }
 431                         }
 432 #endif
 433                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 434                 if (s->version != DTLS1_VERSION)
 435                         memset(&(s->s3->write_sequence[0]),0,8);
 436                 mac_secret= &(s->s3->write_mac_secret[0]);
 437                 mac_secret_size = &(s->s3->write_mac_secret_size);
 438                 }
 439
 440         if (reuse_dd)
 441                 EVP_CIPHER_CTX_cleanup(dd);
 442
 443         p=s->s3->tmp.key_block;
 444         i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
 445
 446         cl=EVP_CIPHER_key_length(c);
 447         j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
 448                        cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
 449         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
 450         k=EVP_CIPHER_iv_length(c);
 451         er1= &(s->s3->client_random[0]);
 452         er2= &(s->s3->server_random[0]);
 453         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 454                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
 455                 {
 456                 ms=  &(p[ 0]); n=i+i;
 457                 key= &(p[ n]); n+=j+j;
 458                 iv=  &(p[ n]); n+=k+k;
 459                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
 460                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
 461                 client_write=1;
 462                 }
 463         else
 464                 {
 465                 n=i;
 466                 ms=  &(p[ n]); n+=i+j;
 467                 key= &(p[ n]); n+=j+k;
 468                 iv=  &(p[ n]); n+=k;
 469                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
 470                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
 471                 client_write=0;
 472                 }
 473
 474         if (n > s->s3->tmp.key_block_length)
 475                 {
 476                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
 477                 goto err2;
 478                 }
 479
 480         memcpy(mac_secret,ms,i);
 481         mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
 482                         mac_secret,*mac_secret_size);
 483         EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
 484         EVP_PKEY_free(mac_key);
 485 #ifdef TLS_DEBUG
 486 printf("which = %04X\nmac key=",which);
 487 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
 488 #endif
 489         if (is_export)
 490                 {
 491                 /* In here I set both the read and write key/iv to the
 492                  * same value since only the correct one will be used :-).
 493                  */
 494                 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 495                                 exp_label,exp_label_len,
 496                                 s->s3->client_random,SSL3_RANDOM_SIZE,
 497                                 s->s3->server_random,SSL3_RANDOM_SIZE,
 498                                 NULL,0,NULL,0,
 499                                 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
 500                         goto err2;
 501                 key=tmp1;
 502
 503                 if (k > 0)
 504                         {
 505                         if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 506                                         TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
 507                                         s->s3->client_random,SSL3_RANDOM_SIZE,
 508                                         s->s3->server_random,SSL3_RANDOM_SIZE,
 509                                         NULL,0,NULL,0,
 510                                         empty,0,iv1,iv2,k*2))
 511                                 goto err2;
 512                         if (client_write)
 513                                 iv=iv1;
 514                         else
 515                                 iv= &(iv1[k]);
 516                         }
 517                 }
 518
 519         s->session->key_arg_length=0;
 520 #ifdef KSSL_DEBUG
 521         {
 522         int i;
 523         printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
 524         printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
 525         printf("\n");
 526         printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
 527         printf("\n");
 528         }
 529 #endif  /* KSSL_DEBUG */
 530
 531         EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
 532 #ifdef TLS_DEBUG
 533 printf("which = %04X\nkey=",which);
 534 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
 535 printf("\niv=");
 536 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
 537 printf("\n");
 538 #endif
 539
 540         OPENSSL_cleanse(tmp1,sizeof(tmp1));
 541         OPENSSL_cleanse(tmp2,sizeof(tmp1));
 542         OPENSSL_cleanse(iv1,sizeof(iv1));
 543         OPENSSL_cleanse(iv2,sizeof(iv2));
 544         return(1);
 545 err:
 546         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
 547 err2:
 548         return(0);
 549         }
 550
 551 int tls1_setup_key_block(SSL *s)
 552         {
 553         unsigned char *p1,*p2=NULL;
 554         const EVP_CIPHER *c;
 555         const EVP_MD *hash;
 556         int num;
 557         SSL_COMP *comp;
 558         int mac_type= NID_undef,mac_secret_size=0;
 559         int ret=0;
 560
 561 #ifdef KSSL_DEBUG
 562         printf ("tls1_setup_key_block()\n");
 563 #endif  /* KSSL_DEBUG */
 564
 565         if (s->s3->tmp.key_block_length != 0)
 566                 return(1);
 567
 568         if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
 569                 {
 570                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 571                 return(0);
 572                 }
 573
 574         s->s3->tmp.new_sym_enc=c;
 575         s->s3->tmp.new_hash=hash;
 576         s->s3->tmp.new_mac_pkey_type = mac_type;
 577         s->s3->tmp.new_mac_secret_size = mac_secret_size;
 578         num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
 579         num*=2;
 580
 581         ssl3_cleanup_key_block(s);
 582
 583         if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 584                 {
 585                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 586                 goto err;
 587                 }
 588
 589         s->s3->tmp.key_block_length=num;
 590         s->s3->tmp.key_block=p1;
 591
 592         if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 593                 {
 594                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 595                 goto err;
 596                 }
 597
 598 #ifdef TLS_DEBUG
 599 printf("client random\n");
 600 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
 601 printf("server random\n");
 602 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
 603 printf("pre-master\n");
 604 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
 605 #endif
 606         if (!tls1_generate_key_block(s,p1,p2,num))
 607                 goto err;
 608 #ifdef TLS_DEBUG
 609 printf("\nkey block\n");
 610 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
 611 #endif
 612
 613         if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
 614                 {
 615                 /* enable vulnerability countermeasure for CBC ciphers with
 616                  * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 617                  */
 618                 s->s3->need_empty_fragments = 1;
 619
 620                 if (s->session->cipher != NULL)
 621                         {
 622                         if (s->session->cipher->algorithm_enc == SSL_eNULL)
 623                                 s->s3->need_empty_fragments = 0;
 624
 625 #ifndef OPENSSL_NO_RC4
 626                         if (s->session->cipher->algorithm_enc == SSL_RC4)
 627                                 s->s3->need_empty_fragments = 0;
 628 #endif
 629                         }
 630                 }
 631
 632         ret = 1;
 633 err:
 634         if (p2)
 635                 {
 636                 OPENSSL_cleanse(p2,num);
 637                 OPENSSL_free(p2);
 638                 }
 639         return(ret);
 640         }
 641
 642 int tls1_enc(SSL *s, int send)
 643         {
 644         SSL3_RECORD *rec;
 645         EVP_CIPHER_CTX *ds;
 646         unsigned long l;
 647         int bs,i,ii,j,k,n=0;
 648         const EVP_CIPHER *enc;
 649
 650         if (send)
 651                 {
 652                 if (EVP_MD_CTX_md(s->write_hash))
 653                         {
 654                         n=EVP_MD_CTX_size(s->write_hash);
 655                         OPENSSL_assert(n >= 0);
 656                         }
 657                 ds=s->enc_write_ctx;
 658                 rec= &(s->s3->wrec);
 659                 if (s->enc_write_ctx == NULL)
 660                         enc=NULL;
 661                 else
 662                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
 663                 }
 664         else
 665                 {
 666                 if (EVP_MD_CTX_md(s->read_hash))
 667                         {
 668                         n=EVP_MD_CTX_size(s->read_hash);
 669                         OPENSSL_assert(n >= 0);
 670                         }
 671                 ds=s->enc_read_ctx;
 672                 rec= &(s->s3->rrec);
 673                 if (s->enc_read_ctx == NULL)
 674                         enc=NULL;
 675                 else
 676                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
 677                 }
 678
 679 #ifdef KSSL_DEBUG
 680         printf("tls1_enc(%d)\n", send);
 681 #endif    /* KSSL_DEBUG */
 682
 683         if ((s->session == NULL) || (ds == NULL) ||
 684                 (enc == NULL))
 685                 {
 686                 memmove(rec->data,rec->input,rec->length);
 687                 rec->input=rec->data;
 688                 }
 689         else
 690                 {
 691                 l=rec->length;
 692                 bs=EVP_CIPHER_block_size(ds->cipher);
 693
 694                 if ((bs != 1) && send)
 695                         {
 696                         i=bs-((int)l%bs);
 697
 698                         /* Add weird padding of upto 256 bytes */
 699
 700                         /* we need to add 'i' padding bytes of value j */
 701                         j=i-1;
 702                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
 703                                 {
 704                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 705                                         j++;
 706                                 }
 707                         for (k=(int)l; k<(int)(l+i); k++)
 708                                 rec->input[k]=j;
 709                         l+=i;
 710                         rec->length+=i;
 711                         }
 712
 713 #ifdef KSSL_DEBUG
 714                 {
 715                 unsigned long ui;
 716                 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
 717                         ds,rec->data,rec->input,l);
 718                 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
 719                         ds->buf_len, ds->cipher->key_len,
 720                         DES_KEY_SZ, DES_SCHEDULE_SZ,
 721                         ds->cipher->iv_len);
 722                 printf("\t\tIV: ");
 723                 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
 724                 printf("\n");
 725                 printf("\trec->input=");
 726                 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
 727                 printf("\n");
 728                 }
 729 #endif  /* KSSL_DEBUG */
 730
 731                 if (!send)
 732                         {
 733                         if (l == 0 || l%bs != 0)
 734                                 {
 735                                 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
 736                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
 737                                 return 0;
 738                                 }
 739                         }
 740
 741                 EVP_Cipher(ds,rec->data,rec->input,l);
 742
 743 #ifdef KSSL_DEBUG
 744                 {
 745                 unsigned long i;
 746                 printf("\trec->data=");
 747                 for (i=0; i<l; i++)
 748                         printf(" %02x", rec->data[i]);  printf("\n");
 749                 }
 750 #endif  /* KSSL_DEBUG */
 751
 752                 if ((bs != 1) && !send)
 753                         {
 754                         ii=i=rec->data[l-1]; /* padding_length */
 755                         i++;
 756                         /* NB: if compression is in operation the first packet
 757                          * may not be of even length so the padding bug check
 758                          * cannot be performed. This bug workaround has been
 759                          * around since SSLeay so hopefully it is either fixed
 760                          * now or no buggy implementation supports compression
 761                          * [steve]
 762                          */
 763                         if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
 764                                 && !s->expand)
 765                                 {
 766                                 /* First packet is even in size, so check */
 767                                 if ((memcmp(s->s3->read_sequence,
 768                                         "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
 769                                         s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
 770                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 771                                         i--;
 772                                 }
 773                         /* TLS 1.0 does not bound the number of padding bytes by the block size.
 774                          * All of them must have value 'padding_length'. */
 775                         if (i > (int)rec->length)
 776                                 {
 777                                 /* Incorrect padding. SSLerr() and ssl3_alert are done
 778                                  * by caller: we don't want to reveal whether this is
 779                                  * a decryption error or a MAC verification failure
 780                                  * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
 781                                 return -1;
 782                                 }
 783                         for (j=(int)(l-i); j<(int)l; j++)
 784                                 {
 785                                 if (rec->data[j] != ii)
 786                                         {
 787                                         /* Incorrect padding */
 788                                         return -1;
 789                                         }
 790                                 }
 791                         rec->length-=i;
 792                         }
 793                 }
 794         return(1);
 795         }
 796 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
 797         {
 798         unsigned int ret;
 799         EVP_MD_CTX ctx, *d=NULL;
 800         int i;
 801
 802         if (s->s3->handshake_buffer)
 803                 if (!ssl3_digest_cached_records(s))
 804                         return 0;
 805
 806         for (i=0;i<SSL_MAX_DIGEST;i++)
 807                 {
 808                   if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
 809                         {
 810                         d=s->s3->handshake_dgst[i];
 811                         break;
 812                         }
 813                 }
 814         if (!d) {
 815                 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
 816                 return 0;
 817         }
 818
 819         EVP_MD_CTX_init(&ctx);
 820         EVP_MD_CTX_copy_ex(&ctx,d);
 821         EVP_DigestFinal_ex(&ctx,out,&ret);
 822         EVP_MD_CTX_cleanup(&ctx);
 823         return((int)ret);
 824         }
 825
 826 int tls1_final_finish_mac(SSL *s,
 827              const char *str, int slen, unsigned char *out)
 828         {
 829         unsigned int i;
 830         EVP_MD_CTX ctx;
 831         unsigned char buf[2*EVP_MAX_MD_SIZE];
 832         unsigned char *q,buf2[12];
 833         int idx;
 834         long mask;
 835         int err=0;
 836         const EVP_MD *md;
 837
 838         q=buf;
 839
 840         if (s->s3->handshake_buffer)
 841                 if (!ssl3_digest_cached_records(s))
 842                         return 0;
 843
 844         EVP_MD_CTX_init(&ctx);
 845
 846         for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
 847                 {
 848                 if (mask & s->s3->tmp.new_cipher->algorithm2)
 849                         {
 850                         int hashsize = EVP_MD_size(md);
 851                         if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
 852                                 {
 853                                 /* internal error: 'buf' is too small for this cipersuite! */
 854                                 err = 1;
 855                                 }
 856                         else
 857                                 {
 858                                 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
 859                                 EVP_DigestFinal_ex(&ctx,q,&i);
 860                                 if (i != (unsigned int)hashsize) /* can't really happen */
 861                                         err = 1;
 862                                 q+=i;
 863                                 }
 864                         }
 865                 }
 866
 867         if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 868                         str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
 869                         s->session->master_key,s->session->master_key_length,
 870                         out,buf2,sizeof buf2))
 871                 err = 1;
 872         EVP_MD_CTX_cleanup(&ctx);
 873
 874         if (err)
 875                 return 0;
 876         else
 877                 return sizeof buf2;
 878         }
 879
 880 int tls1_mac(SSL *ssl, unsigned char *md, int send)
 881         {
 882         SSL3_RECORD *rec;
 883         unsigned char *mac_sec,*seq;
 884         EVP_MD_CTX *hash;
 885         size_t md_size;
 886         int i;
 887         EVP_MD_CTX hmac, *mac_ctx;
 888         unsigned char buf[5];
 889         int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
 890         int t;
 891
 892         if (send)
 893                 {
 894                 rec= &(ssl->s3->wrec);
 895                 mac_sec= &(ssl->s3->write_mac_secret[0]);
 896                 seq= &(ssl->s3->write_sequence[0]);
 897                 hash=ssl->write_hash;
 898                 }
 899         else
 900                 {
 901                 rec= &(ssl->s3->rrec);
 902                 mac_sec= &(ssl->s3->read_mac_secret[0]);
 903                 seq= &(ssl->s3->read_sequence[0]);
 904                 hash=ssl->read_hash;
 905                 }
 906
 907         t=EVP_MD_CTX_size(hash);
 908         OPENSSL_assert(t >= 0);
 909         md_size=t;
 910
 911         buf[0]=rec->type;
 912         buf[1]=(unsigned char)(ssl->version>>8);
 913         buf[2]=(unsigned char)(ssl->version);
 914         buf[3]=rec->length>>8;
 915         buf[4]=rec->length&0xff;
 916
 917         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
 918         if (stream_mac)
 919                 {
 920                         mac_ctx = hash;
 921                 }
 922                 else
 923                 {
 924                         EVP_MD_CTX_copy(&hmac,hash);
 925                         mac_ctx = &hmac;
 926                 }
 927
 928         if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
 929                 {
 930                 unsigned char dtlsseq[8],*p=dtlsseq;
 931
 932                 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
 933                 memcpy (p,&seq[2],6);
 934
 935                 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
 936                 }
 937         else
 938                 EVP_DigestSignUpdate(mac_ctx,seq,8);
 939
 940         EVP_DigestSignUpdate(mac_ctx,buf,5);
 941         EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
 942         t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
 943         OPENSSL_assert(t > 0);
 944
 945         if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
 946 #ifdef TLS_DEBUG
 947 printf("sec=");
 948 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
 949 printf("seq=");
 950 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
 951 printf("buf=");
 952 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
 953 printf("rec=");
 954 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
 955 #endif
 956
 957         if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
 958                 {
 959                 for (i=7; i>=0; i--)
 960                         {
 961                         ++seq[i];
 962                         if (seq[i] != 0) break;
 963                         }
 964                 }
 965
 966 #ifdef TLS_DEBUG
 967 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
 968 #endif
 969         return(md_size);
 970         }
 971
 972 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 973              int len)
 974         {
 975         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
 976         const void *co = NULL, *so = NULL;
 977         int col = 0, sol = 0;
 978
 979 #ifdef KSSL_DEBUG
 980         printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
 981 #endif  /* KSSL_DEBUG */
 982
 983 #ifdef TLSEXT_TYPE_opaque_prf_input
 984         if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
 985             s->s3->client_opaque_prf_input_len > 0 &&
 986             s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
 987                 {
 988                 co = s->s3->client_opaque_prf_input;
 989                 col = s->s3->server_opaque_prf_input_len;
 990                 so = s->s3->server_opaque_prf_input;
 991                 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) */
 992                 }
 993 #endif
 994
 995         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 996                 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
 997                 s->s3->client_random,SSL3_RANDOM_SIZE,
 998                 co, col,
 999                 s->s3->server_random,SSL3_RANDOM_SIZE,
1000                 so, sol,
1001                 p,len,
1002                 s->session->master_key,buff,sizeof buff);
1003
1004 #ifdef KSSL_DEBUG
1005         printf ("tls1_generate_master_secret() complete\n");
1006 #endif  /* KSSL_DEBUG */
1007         return(SSL3_MASTER_SECRET_SIZE);
1008         }
1009
1010 int tls1_alert_code(int code)
1011         {
1012         switch (code)
1013                 {
1014         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
1015         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1016         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
1017         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
1018         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
1019         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1020         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
1021         case SSL_AD_NO_CERTIFICATE:     return(-1);
1022         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
1023         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1024         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1025         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1026         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1027         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
1028         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
1029         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
1030         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
1031         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
1032         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1033         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
1034         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1035         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
1036         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
1037         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
1038         case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1039         case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1040         case SSL_AD_UNRECOGNIZED_NAME:  return(TLS1_AD_UNRECOGNIZED_NAME);
1041         case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1042         case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1043         case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1044 #if 0 /* not appropriate for TLS, not used for DTLS */
1045         case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1046                                           (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1047 #endif
1048         default:                        return(-1);
1049                 }
1050         }
1051