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         unsigned int j;
 163         HMAC_CTX ctx;
 164         HMAC_CTX ctx_tmp;
 165         unsigned char A1[EVP_MAX_MD_SIZE];
 166         unsigned int A1_len;
 167         int ret = 0;
 168
 169         chunk=EVP_MD_size(md);
 170         OPENSSL_assert(chunk >= 0);
 171
 172         HMAC_CTX_init(&ctx);
 173         HMAC_CTX_init(&ctx_tmp);
 174         if (!HMAC_Init_ex(&ctx,sec,sec_len,md, NULL))
 175                 goto err;
 176         if (!HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL))
 177                 goto err;
 178         if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
 179                 goto err;
 180         if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
 181                 goto err;
 182         if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
 183                 goto err;
 184         if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
 185                 goto err;
 186         if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
 187                 goto err;
 188         if (!HMAC_Final(&ctx,A1,&A1_len))
 189                 goto err;
 190
 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,*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;
 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
 341 #ifdef KSSL_DEBUG
 342         printf("tls1_change_cipher_state(which= %d) w/\n", which);
 343         printf("\talg= %ld/%ld, comp= %p\n",
 344                s->s3->tmp.new_cipher->algorithm_mkey,
 345                s->s3->tmp.new_cipher->algorithm_auth,
 346                comp);
 347         printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
 348         printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
 349                 c->nid,c->block_size,c->key_len,c->iv_len);
 350         printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
 351         {
 352         int i;
 353         for (i=0; i<s->s3->tmp.key_block_length; i++)
 354                 printf("%02x", key_block[i]);  printf("\n");
 355         }
 356 #endif  /* KSSL_DEBUG */
 357
 358         if (which & SSL3_CC_READ)
 359                 {
 360                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 361                         s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
 362                         else
 363                         s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 364
 365                 if (s->enc_read_ctx != NULL)
 366                         reuse_dd = 1;
 367                 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 368                         goto err;
 369                 else
 370                         /* make sure it's intialized in case we exit later with an error */
 371                         EVP_CIPHER_CTX_init(s->enc_read_ctx);
 372                 dd= s->enc_read_ctx;
 373                 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
 374 #ifndef OPENSSL_NO_COMP
 375                 if (s->expand != NULL)
 376                         {
 377                         COMP_CTX_free(s->expand);
 378                         s->expand=NULL;
 379                         }
 380                 if (comp != NULL)
 381                         {
 382                         s->expand=COMP_CTX_new(comp->method);
 383                         if (s->expand == NULL)
 384                                 {
 385                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 386                                 goto err2;
 387                                 }
 388                         if (s->s3->rrec.comp == NULL)
 389                                 s->s3->rrec.comp=(unsigned char *)
 390                                         OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
 391                         if (s->s3->rrec.comp == NULL)
 392                                 goto err;
 393                         }
 394 #endif
 395                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 396                 if (s->version != DTLS1_VERSION)
 397                         memset(&(s->s3->read_sequence[0]),0,8);
 398                 mac_secret= &(s->s3->read_mac_secret[0]);
 399                 mac_secret_size=&(s->s3->read_mac_secret_size);
 400                 }
 401         else
 402                 {
 403                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 404                         s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
 405                         else
 406                         s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
 407                 if (s->enc_write_ctx != NULL)
 408                         reuse_dd = 1;
 409                 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 410                         goto err;
 411                 else
 412                         /* make sure it's intialized in case we exit later with an error */
 413                         EVP_CIPHER_CTX_init(s->enc_write_ctx);
 414                 dd= s->enc_write_ctx;
 415                 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
 416 #ifndef OPENSSL_NO_COMP
 417                 if (s->compress != NULL)
 418                         {
 419                         COMP_CTX_free(s->compress);
 420                         s->compress=NULL;
 421                         }
 422                 if (comp != NULL)
 423                         {
 424                         s->compress=COMP_CTX_new(comp->method);
 425                         if (s->compress == NULL)
 426                                 {
 427                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 428                                 goto err2;
 429                                 }
 430                         }
 431 #endif
 432                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 433                 if (s->version != DTLS1_VERSION)
 434                         memset(&(s->s3->write_sequence[0]),0,8);
 435                 mac_secret= &(s->s3->write_mac_secret[0]);
 436                 mac_secret_size = &(s->s3->write_mac_secret_size);
 437                 }
 438
 439         if (reuse_dd)
 440                 EVP_CIPHER_CTX_cleanup(dd);
 441
 442         p=s->s3->tmp.key_block;
 443         i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
 444
 445         cl=EVP_CIPHER_key_length(c);
 446         j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
 447                        cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
 448         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
 449         k=EVP_CIPHER_iv_length(c);
 450         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 451                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
 452                 {
 453                 ms=  &(p[ 0]); n=i+i;
 454                 key= &(p[ n]); n+=j+j;
 455                 iv=  &(p[ n]); n+=k+k;
 456                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
 457                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
 458                 client_write=1;
 459                 }
 460         else
 461                 {
 462                 n=i;
 463                 ms=  &(p[ n]); n+=i+j;
 464                 key= &(p[ n]); n+=j+k;
 465                 iv=  &(p[ n]); n+=k;
 466                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
 467                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
 468                 client_write=0;
 469                 }
 470
 471         if (n > s->s3->tmp.key_block_length)
 472                 {
 473                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
 474                 goto err2;
 475                 }
 476
 477         memcpy(mac_secret,ms,i);
 478         mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
 479                         mac_secret,*mac_secret_size);
 480         EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
 481         EVP_PKEY_free(mac_key);
 482 #ifdef TLS_DEBUG
 483 printf("which = %04X\nmac key=",which);
 484 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
 485 #endif
 486         if (is_export)
 487                 {
 488                 /* In here I set both the read and write key/iv to the
 489                  * same value since only the correct one will be used :-).
 490                  */
 491                 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 492                                 exp_label,exp_label_len,
 493                                 s->s3->client_random,SSL3_RANDOM_SIZE,
 494                                 s->s3->server_random,SSL3_RANDOM_SIZE,
 495                                 NULL,0,NULL,0,
 496                                 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
 497                         goto err2;
 498                 key=tmp1;
 499
 500                 if (k > 0)
 501                         {
 502                         if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 503                                         TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
 504                                         s->s3->client_random,SSL3_RANDOM_SIZE,
 505                                         s->s3->server_random,SSL3_RANDOM_SIZE,
 506                                         NULL,0,NULL,0,
 507                                         empty,0,iv1,iv2,k*2))
 508                                 goto err2;
 509                         if (client_write)
 510                                 iv=iv1;
 511                         else
 512                                 iv= &(iv1[k]);
 513                         }
 514                 }
 515
 516         s->session->key_arg_length=0;
 517 #ifdef KSSL_DEBUG
 518         {
 519         int i;
 520         printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
 521         printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
 522         printf("\n");
 523         printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
 524         printf("\n");
 525         }
 526 #endif  /* KSSL_DEBUG */
 527
 528         EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
 529 #ifdef TLS_DEBUG
 530 printf("which = %04X\nkey=",which);
 531 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
 532 printf("\niv=");
 533 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
 534 printf("\n");
 535 #endif
 536
 537         OPENSSL_cleanse(tmp1,sizeof(tmp1));
 538         OPENSSL_cleanse(tmp2,sizeof(tmp1));
 539         OPENSSL_cleanse(iv1,sizeof(iv1));
 540         OPENSSL_cleanse(iv2,sizeof(iv2));
 541         return(1);
 542 err:
 543         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
 544 err2:
 545         return(0);
 546         }
 547
 548 int tls1_setup_key_block(SSL *s)
 549         {
 550         unsigned char *p1,*p2=NULL;
 551         const EVP_CIPHER *c;
 552         const EVP_MD *hash;
 553         int num;
 554         SSL_COMP *comp;
 555         int mac_type= NID_undef,mac_secret_size=0;
 556         int ret=0;
 557
 558 #ifdef KSSL_DEBUG
 559         printf ("tls1_setup_key_block()\n");
 560 #endif  /* KSSL_DEBUG */
 561
 562         if (s->s3->tmp.key_block_length != 0)
 563                 return(1);
 564
 565         if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
 566                 {
 567                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 568                 return(0);
 569                 }
 570
 571         s->s3->tmp.new_sym_enc=c;
 572         s->s3->tmp.new_hash=hash;
 573         s->s3->tmp.new_mac_pkey_type = mac_type;
 574         s->s3->tmp.new_mac_secret_size = mac_secret_size;
 575         num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
 576         num*=2;
 577
 578         ssl3_cleanup_key_block(s);
 579
 580         if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 581                 {
 582                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 583                 goto err;
 584                 }
 585
 586         s->s3->tmp.key_block_length=num;
 587         s->s3->tmp.key_block=p1;
 588
 589         if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 590                 {
 591                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 592                 goto err;
 593                 }
 594
 595 #ifdef TLS_DEBUG
 596 printf("client random\n");
 597 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
 598 printf("server random\n");
 599 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
 600 printf("pre-master\n");
 601 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
 602 #endif
 603         if (!tls1_generate_key_block(s,p1,p2,num))
 604                 goto err;
 605 #ifdef TLS_DEBUG
 606 printf("\nkey block\n");
 607 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
 608 #endif
 609
 610         if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
 611                 && s->method->version <= TLS1_VERSION)
 612                 {
 613                 /* enable vulnerability countermeasure for CBC ciphers with
 614                  * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 615                  */
 616                 s->s3->need_empty_fragments = 1;
 617
 618                 if (s->session->cipher != NULL)
 619                         {
 620                         if (s->session->cipher->algorithm_enc == SSL_eNULL)
 621                                 s->s3->need_empty_fragments = 0;
 622
 623 #ifndef OPENSSL_NO_RC4
 624                         if (s->session->cipher->algorithm_enc == SSL_RC4)
 625                                 s->s3->need_empty_fragments = 0;
 626 #endif
 627                         }
 628                 }
 629
 630         ret = 1;
 631 err:
 632         if (p2)
 633                 {
 634                 OPENSSL_cleanse(p2,num);
 635                 OPENSSL_free(p2);
 636                 }
 637         return(ret);
 638         }
 639
 640 int tls1_enc(SSL *s, int send)
 641         {
 642         SSL3_RECORD *rec;
 643         EVP_CIPHER_CTX *ds;
 644         unsigned long l;
 645         int bs,i,ii,j,k,n=0;
 646         const EVP_CIPHER *enc;
 647
 648         if (send)
 649                 {
 650                 if (EVP_MD_CTX_md(s->write_hash))
 651                         {
 652                         n=EVP_MD_CTX_size(s->write_hash);
 653                         OPENSSL_assert(n >= 0);
 654                         }
 655                 ds=s->enc_write_ctx;
 656                 rec= &(s->s3->wrec);
 657                 if (s->enc_write_ctx == NULL)
 658                         enc=NULL;
 659                 else
 660                         {
 661                         int ivlen;
 662                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
 663                         /* For TLSv1.1 and later explicit IV */
 664                         if (s->version >= TLS1_1_VERSION)
 665                                 ivlen = EVP_CIPHER_iv_length(enc);
 666                         else
 667                                 ivlen = 0;
 668                         if (ivlen > 1)
 669                                 {
 670                                 if ( rec->data != rec->input)
 671                                 /* we can't write into the input stream:
 672                                  * Can this ever happen?? (steve)
 673                                  */
 674                                 fprintf(stderr,
 675                                         "%s:%d: rec->data != rec->input\n",
 676                                         __FILE__, __LINE__);
 677                                 else if (RAND_bytes(rec->input, ivlen) <= 0)
 678                                         return -1;
 679                                 }
 680                         }
 681                 }
 682         else
 683                 {
 684                 if (EVP_MD_CTX_md(s->read_hash))
 685                         {
 686                         n=EVP_MD_CTX_size(s->read_hash);
 687                         OPENSSL_assert(n >= 0);
 688                         }
 689                 ds=s->enc_read_ctx;
 690                 rec= &(s->s3->rrec);
 691                 if (s->enc_read_ctx == NULL)
 692                         enc=NULL;
 693                 else
 694                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
 695                 }
 696
 697 #ifdef KSSL_DEBUG
 698         printf("tls1_enc(%d)\n", send);
 699 #endif    /* KSSL_DEBUG */
 700
 701         if ((s->session == NULL) || (ds == NULL) ||
 702                 (enc == NULL))
 703                 {
 704                 memmove(rec->data,rec->input,rec->length);
 705                 rec->input=rec->data;
 706                 }
 707         else
 708                 {
 709                 l=rec->length;
 710                 bs=EVP_CIPHER_block_size(ds->cipher);
 711
 712                 if ((bs != 1) && send)
 713                         {
 714                         i=bs-((int)l%bs);
 715
 716                         /* Add weird padding of upto 256 bytes */
 717
 718                         /* we need to add 'i' padding bytes of value j */
 719                         j=i-1;
 720                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
 721                                 {
 722                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 723                                         j++;
 724                                 }
 725                         for (k=(int)l; k<(int)(l+i); k++)
 726                                 rec->input[k]=j;
 727                         l+=i;
 728                         rec->length+=i;
 729                         }
 730
 731 #ifdef KSSL_DEBUG
 732                 {
 733                 unsigned long ui;
 734                 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
 735                         ds,rec->data,rec->input,l);
 736                 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
 737                         ds->buf_len, ds->cipher->key_len,
 738                         DES_KEY_SZ, DES_SCHEDULE_SZ,
 739                         ds->cipher->iv_len);
 740                 printf("\t\tIV: ");
 741                 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
 742                 printf("\n");
 743                 printf("\trec->input=");
 744                 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
 745                 printf("\n");
 746                 }
 747 #endif  /* KSSL_DEBUG */
 748
 749                 if (!send)
 750                         {
 751                         if (l == 0 || l%bs != 0)
 752                                 {
 753                                 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
 754                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
 755                                 return 0;
 756                                 }
 757                         }
 758
 759                 EVP_Cipher(ds,rec->data,rec->input,l);
 760
 761 #ifdef KSSL_DEBUG
 762                 {
 763                 unsigned long i;
 764                 printf("\trec->data=");
 765                 for (i=0; i<l; i++)
 766                         printf(" %02x", rec->data[i]);  printf("\n");
 767                 }
 768 #endif  /* KSSL_DEBUG */
 769
 770                 if ((bs != 1) && !send)
 771                         {
 772                         ii=i=rec->data[l-1]; /* padding_length */
 773                         i++;
 774                         /* NB: if compression is in operation the first packet
 775                          * may not be of even length so the padding bug check
 776                          * cannot be performed. This bug workaround has been
 777                          * around since SSLeay so hopefully it is either fixed
 778                          * now or no buggy implementation supports compression
 779                          * [steve]
 780                          */
 781                         if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
 782                                 && !s->expand)
 783                                 {
 784                                 /* First packet is even in size, so check */
 785                                 if ((memcmp(s->s3->read_sequence,
 786                                         "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
 787                                         s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
 788                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 789                                         i--;
 790                                 }
 791                         /* TLS 1.0 does not bound the number of padding bytes by the block size.
 792                          * All of them must have value 'padding_length'. */
 793                         if (i > (int)rec->length)
 794                                 {
 795                                 /* Incorrect padding. SSLerr() and ssl3_alert are done
 796                                  * by caller: we don't want to reveal whether this is
 797                                  * a decryption error or a MAC verification failure
 798                                  * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
 799                                 return -1;
 800                                 }
 801                         for (j=(int)(l-i); j<(int)l; j++)
 802                                 {
 803                                 if (rec->data[j] != ii)
 804                                         {
 805                                         /* Incorrect padding */
 806                                         return -1;
 807                                         }
 808                                 }
 809                         rec->length -=i;
 810                         if (s->version >= TLS1_1_VERSION)
 811                                 {
 812                                 rec->data += bs;    /* skip the explicit IV */
 813                                 rec->input += bs;
 814                                 rec->length -= bs;
 815                                 }
 816                         }
 817                 }
 818         return(1);
 819         }
 820 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
 821         {
 822         unsigned int ret;
 823         EVP_MD_CTX ctx, *d=NULL;
 824         int i;
 825
 826         if (s->s3->handshake_buffer)
 827                 if (!ssl3_digest_cached_records(s))
 828                         return 0;
 829
 830         for (i=0;i<SSL_MAX_DIGEST;i++)
 831                 {
 832                   if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
 833                         {
 834                         d=s->s3->handshake_dgst[i];
 835                         break;
 836                         }
 837                 }
 838         if (!d) {
 839                 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
 840                 return 0;
 841         }
 842
 843         EVP_MD_CTX_init(&ctx);
 844         EVP_MD_CTX_copy_ex(&ctx,d);
 845         EVP_DigestFinal_ex(&ctx,out,&ret);
 846         EVP_MD_CTX_cleanup(&ctx);
 847         return((int)ret);
 848         }
 849
 850 int tls1_final_finish_mac(SSL *s,
 851              const char *str, int slen, unsigned char *out)
 852         {
 853         unsigned int i;
 854         EVP_MD_CTX ctx;
 855         unsigned char buf[2*EVP_MAX_MD_SIZE];
 856         unsigned char *q,buf2[12];
 857         int idx;
 858         long mask;
 859         int err=0;
 860         const EVP_MD *md;
 861
 862         q=buf;
 863
 864         if (s->s3->handshake_buffer)
 865                 if (!ssl3_digest_cached_records(s))
 866                         return 0;
 867
 868         EVP_MD_CTX_init(&ctx);
 869
 870         for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
 871                 {
 872                 if (mask & s->s3->tmp.new_cipher->algorithm2)
 873                         {
 874                         int hashsize = EVP_MD_size(md);
 875                         if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
 876                                 {
 877                                 /* internal error: 'buf' is too small for this cipersuite! */
 878                                 err = 1;
 879                                 }
 880                         else
 881                                 {
 882                                 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
 883                                 EVP_DigestFinal_ex(&ctx,q,&i);
 884                                 if (i != (unsigned int)hashsize) /* can't really happen */
 885                                         err = 1;
 886                                 q+=i;
 887                                 }
 888                         }
 889                 }
 890
 891         if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 892                         str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
 893                         s->session->master_key,s->session->master_key_length,
 894                         out,buf2,sizeof buf2))
 895                 err = 1;
 896         EVP_MD_CTX_cleanup(&ctx);
 897
 898         if (err)
 899                 return 0;
 900         else
 901                 return sizeof buf2;
 902         }
 903
 904 int tls1_mac(SSL *ssl, unsigned char *md, int send)
 905         {
 906         SSL3_RECORD *rec;
 907         unsigned char *seq;
 908         EVP_MD_CTX *hash;
 909         size_t md_size;
 910         int i;
 911         EVP_MD_CTX hmac, *mac_ctx;
 912         unsigned char buf[5];
 913         int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
 914         int t;
 915
 916         if (send)
 917                 {
 918                 rec= &(ssl->s3->wrec);
 919                 seq= &(ssl->s3->write_sequence[0]);
 920                 hash=ssl->write_hash;
 921                 }
 922         else
 923                 {
 924                 rec= &(ssl->s3->rrec);
 925                 seq= &(ssl->s3->read_sequence[0]);
 926                 hash=ssl->read_hash;
 927                 }
 928
 929         t=EVP_MD_CTX_size(hash);
 930         OPENSSL_assert(t >= 0);
 931         md_size=t;
 932
 933         buf[0]=rec->type;
 934         buf[1]=(unsigned char)(ssl->version>>8);
 935         buf[2]=(unsigned char)(ssl->version);
 936         buf[3]=rec->length>>8;
 937         buf[4]=rec->length&0xff;
 938
 939         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
 940         if (stream_mac)
 941                 {
 942                         mac_ctx = hash;
 943                 }
 944                 else
 945                 {
 946                         EVP_MD_CTX_copy(&hmac,hash);
 947                         mac_ctx = &hmac;
 948                 }
 949
 950         if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
 951                 {
 952                 unsigned char dtlsseq[8],*p=dtlsseq;
 953
 954                 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
 955                 memcpy (p,&seq[2],6);
 956
 957                 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
 958                 }
 959         else
 960                 EVP_DigestSignUpdate(mac_ctx,seq,8);
 961
 962         EVP_DigestSignUpdate(mac_ctx,buf,5);
 963         EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
 964         t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
 965         OPENSSL_assert(t > 0);
 966
 967         if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
 968 #ifdef TLS_DEBUG
 969 printf("sec=");
 970 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
 971 printf("seq=");
 972 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
 973 printf("buf=");
 974 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
 975 printf("rec=");
 976 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
 977 #endif
 978
 979         if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
 980                 {
 981                 for (i=7; i>=0; i--)
 982                         {
 983                         ++seq[i];
 984                         if (seq[i] != 0) break;
 985                         }
 986                 }
 987
 988 #ifdef TLS_DEBUG
 989 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
 990 #endif
 991         return(md_size);
 992         }
 993
 994 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 995              int len)
 996         {
 997         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
 998         const void *co = NULL, *so = NULL;
 999         int col = 0, sol = 0;
1000
1001 #ifdef KSSL_DEBUG
1002         printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1003 #endif  /* KSSL_DEBUG */
1004
1005 #ifdef TLSEXT_TYPE_opaque_prf_input
1006         if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1007             s->s3->client_opaque_prf_input_len > 0 &&
1008             s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1009                 {
1010                 co = s->s3->client_opaque_prf_input;
1011                 col = s->s3->server_opaque_prf_input_len;
1012                 so = s->s3->server_opaque_prf_input;
1013                 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) */
1014                 }
1015 #endif
1016
1017         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
1018                 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1019                 s->s3->client_random,SSL3_RANDOM_SIZE,
1020                 co, col,
1021                 s->s3->server_random,SSL3_RANDOM_SIZE,
1022                 so, sol,
1023                 p,len,
1024                 s->session->master_key,buff,sizeof buff);
1025
1026 #ifdef KSSL_DEBUG
1027         printf ("tls1_generate_master_secret() complete\n");
1028 #endif  /* KSSL_DEBUG */
1029         return(SSL3_MASTER_SECRET_SIZE);
1030         }
1031
1032 int tls1_alert_code(int code)
1033         {
1034         switch (code)
1035                 {
1036         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
1037         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1038         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
1039         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
1040         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
1041         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1042         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
1043         case SSL_AD_NO_CERTIFICATE:     return(-1);
1044         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
1045         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1046         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1047         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1048         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1049         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
1050         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
1051         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
1052         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
1053         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
1054         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1055         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
1056         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1057         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
1058         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
1059         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
1060         case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1061         case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1062         case SSL_AD_UNRECOGNIZED_NAME:  return(TLS1_AD_UNRECOGNIZED_NAME);
1063         case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1064         case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1065         case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1066 #if 0 /* not appropriate for TLS, not used for DTLS */
1067         case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1068                                           (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1069 #endif
1070         default:                        return(-1);
1071                 }
1072         }
1073