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,n;
 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         n=0;
 192         for (;;)
 193                 {
 194                 if (!HMAC_Init_ex(&ctx,NULL,0,NULL,NULL)) /* re-init */
 195                         goto err;
 196                 if (!HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL)) /* re-init */
 197                         goto err;
 198                 if (!HMAC_Update(&ctx,A1,A1_len))
 199                         goto err;
 200                 if (!HMAC_Update(&ctx_tmp,A1,A1_len))
 201                         goto err;
 202                 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
 203                         goto err;
 204                 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
 205                         goto err;
 206                 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
 207                         goto err;
 208                 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
 209                         goto err;
 210                 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
 211                         goto err;
 212
 213                 if (olen > chunk)
 214                         {
 215                         if (!HMAC_Final(&ctx,out,&j))
 216                                 goto err;
 217                         out+=j;
 218                         olen-=j;
 219                         if (!HMAC_Final(&ctx_tmp,A1,&A1_len)) /* calc the next A1 value */
 220                                 goto err;
 221                         }
 222                 else    /* last one */
 223                         {
 224                         if (!HMAC_Final(&ctx,A1,&A1_len))
 225                                 goto err;
 226                         memcpy(out,A1,olen);
 227                         break;
 228                         }
 229                 }
 230         ret = 1;
 231 err:
 232         HMAC_CTX_cleanup(&ctx);
 233         HMAC_CTX_cleanup(&ctx_tmp);
 234         OPENSSL_cleanse(A1,sizeof(A1));
 235         return ret;
 236         }
 237
 238 /* seed1 through seed5 are virtually concatenated */
 239 static int tls1_PRF(long digest_mask,
 240                      const void *seed1, int seed1_len,
 241                      const void *seed2, int seed2_len,
 242                      const void *seed3, int seed3_len,
 243                      const void *seed4, int seed4_len,
 244                      const void *seed5, int seed5_len,
 245                      const unsigned char *sec, int slen,
 246                      unsigned char *out1,
 247                      unsigned char *out2, int olen)
 248         {
 249         int len,i,idx,count;
 250         const unsigned char *S1;
 251         long m;
 252         const EVP_MD *md;
 253         int ret = 0;
 254
 255         /* Count number of digests and partition sec evenly */
 256         count=0;
 257         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 258                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
 259         }
 260         len=slen/count;
 261         S1=sec;
 262         memset(out1,0,olen);
 263         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 264                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
 265                         if (!md) {
 266                                 SSLerr(SSL_F_TLS1_PRF,
 267                                 SSL_R_UNSUPPORTED_DIGEST_TYPE);
 268                                 goto err;
 269                         }
 270                         if (!tls1_P_hash(md ,S1,len+(slen&1),
 271                                         seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
 272                                         out2,olen))
 273                                 goto err;
 274                         S1+=len;
 275                         for (i=0; i<olen; i++)
 276                         {
 277                                 out1[i]^=out2[i];
 278                         }
 279                 }
 280         }
 281         ret = 1;
 282 err:
 283         return ret;
 284 }
 285 static int tls1_generate_key_block(SSL *s, unsigned char *km,
 286              unsigned char *tmp, int num)
 287         {
 288         int ret;
 289         ret = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 290                  TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
 291                  s->s3->server_random,SSL3_RANDOM_SIZE,
 292                  s->s3->client_random,SSL3_RANDOM_SIZE,
 293                  NULL,0,NULL,0,
 294                  s->session->master_key,s->session->master_key_length,
 295                  km,tmp,num);
 296 #ifdef KSSL_DEBUG
 297         printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
 298                 s->session->master_key_length);
 299         {
 300         int i;
 301         for (i=0; i < s->session->master_key_length; i++)
 302                 {
 303                 printf("%02X", s->session->master_key[i]);
 304                 }
 305         printf("\n");  }
 306 #endif    /* KSSL_DEBUG */
 307         return ret;
 308         }
 309
 310 int tls1_change_cipher_state(SSL *s, int which)
 311         {
 312         static const unsigned char empty[]="";
 313         unsigned char *p,*key_block,*mac_secret;
 314         unsigned char *exp_label;
 315         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
 316         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
 317         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
 318         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
 319         unsigned char *ms,*key,*iv,*er1,*er2;
 320         int client_write;
 321         EVP_CIPHER_CTX *dd;
 322         const EVP_CIPHER *c;
 323 #ifndef OPENSSL_NO_COMP
 324         const SSL_COMP *comp;
 325 #endif
 326         const EVP_MD *m;
 327         int mac_type;
 328         int *mac_secret_size;
 329         EVP_MD_CTX *mac_ctx;
 330         EVP_PKEY *mac_key;
 331         int is_export,n,i,j,k,exp_label_len,cl;
 332         int reuse_dd = 0;
 333
 334         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
 335         c=s->s3->tmp.new_sym_enc;
 336         m=s->s3->tmp.new_hash;
 337         mac_type = s->s3->tmp.new_mac_pkey_type;
 338 #ifndef OPENSSL_NO_COMP
 339         comp=s->s3->tmp.new_compression;
 340 #endif
 341         key_block=s->s3->tmp.key_block;
 342
 343 #ifdef KSSL_DEBUG
 344         printf("tls1_change_cipher_state(which= %d) w/\n", which);
 345         printf("\talg= %ld/%ld, comp= %p\n",
 346                s->s3->tmp.new_cipher->algorithm_mkey,
 347                s->s3->tmp.new_cipher->algorithm_auth,
 348                comp);
 349         printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
 350         printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
 351                 c->nid,c->block_size,c->key_len,c->iv_len);
 352         printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
 353         {
 354         int i;
 355         for (i=0; i<s->s3->tmp.key_block_length; i++)
 356                 printf("%02x", key_block[i]);  printf("\n");
 357         }
 358 #endif  /* KSSL_DEBUG */
 359
 360         if (which & SSL3_CC_READ)
 361                 {
 362                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 363                         s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
 364                         else
 365                         s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 366
 367                 if (s->enc_read_ctx != NULL)
 368                         reuse_dd = 1;
 369                 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 370                         goto err;
 371                 else
 372                         /* make sure it's intialized in case we exit later with an error */
 373                         EVP_CIPHER_CTX_init(s->enc_read_ctx);
 374                 dd= s->enc_read_ctx;
 375                 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
 376 #ifndef OPENSSL_NO_COMP
 377                 if (s->expand != NULL)
 378                         {
 379                         COMP_CTX_free(s->expand);
 380                         s->expand=NULL;
 381                         }
 382                 if (comp != NULL)
 383                         {
 384                         s->expand=COMP_CTX_new(comp->method);
 385                         if (s->expand == NULL)
 386                                 {
 387                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 388                                 goto err2;
 389                                 }
 390                         if (s->s3->rrec.comp == NULL)
 391                                 s->s3->rrec.comp=(unsigned char *)
 392                                         OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
 393                         if (s->s3->rrec.comp == NULL)
 394                                 goto err;
 395                         }
 396 #endif
 397                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 398                 if (s->version != DTLS1_VERSION)
 399                         memset(&(s->s3->read_sequence[0]),0,8);
 400                 mac_secret= &(s->s3->read_mac_secret[0]);
 401                 mac_secret_size=&(s->s3->read_mac_secret_size);
 402                 }
 403         else
 404                 {
 405                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 406                         s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
 407                         else
 408                         s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
 409                 if (s->enc_write_ctx != NULL)
 410                         reuse_dd = 1;
 411                 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 412                         goto err;
 413                 else
 414                         /* make sure it's intialized in case we exit later with an error */
 415                         EVP_CIPHER_CTX_init(s->enc_write_ctx);
 416                 dd= s->enc_write_ctx;
 417                 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
 418 #ifndef OPENSSL_NO_COMP
 419                 if (s->compress != NULL)
 420                         {
 421                         COMP_CTX_free(s->compress);
 422                         s->compress=NULL;
 423                         }
 424                 if (comp != NULL)
 425                         {
 426                         s->compress=COMP_CTX_new(comp->method);
 427                         if (s->compress == NULL)
 428                                 {
 429                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 430                                 goto err2;
 431                                 }
 432                         }
 433 #endif
 434                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 435                 if (s->version != DTLS1_VERSION)
 436                         memset(&(s->s3->write_sequence[0]),0,8);
 437                 mac_secret= &(s->s3->write_mac_secret[0]);
 438                 mac_secret_size = &(s->s3->write_mac_secret_size);
 439                 }
 440
 441         if (reuse_dd)
 442                 EVP_CIPHER_CTX_cleanup(dd);
 443
 444         p=s->s3->tmp.key_block;
 445         i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
 446
 447         cl=EVP_CIPHER_key_length(c);
 448         j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
 449                        cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
 450         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
 451         k=EVP_CIPHER_iv_length(c);
 452         er1= &(s->s3->client_random[0]);
 453         er2= &(s->s3->server_random[0]);
 454         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 455                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
 456                 {
 457                 ms=  &(p[ 0]); n=i+i;
 458                 key= &(p[ n]); n+=j+j;
 459                 iv=  &(p[ n]); n+=k+k;
 460                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
 461                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
 462                 client_write=1;
 463                 }
 464         else
 465                 {
 466                 n=i;
 467                 ms=  &(p[ n]); n+=i+j;
 468                 key= &(p[ n]); n+=j+k;
 469                 iv=  &(p[ n]); n+=k;
 470                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
 471                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
 472                 client_write=0;
 473                 }
 474
 475         if (n > s->s3->tmp.key_block_length)
 476                 {
 477                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
 478                 goto err2;
 479                 }
 480
 481         memcpy(mac_secret,ms,i);
 482         mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
 483                         mac_secret,*mac_secret_size);
 484         EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
 485         EVP_PKEY_free(mac_key);
 486 #ifdef TLS_DEBUG
 487 printf("which = %04X\nmac key=",which);
 488 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
 489 #endif
 490         if (is_export)
 491                 {
 492                 /* In here I set both the read and write key/iv to the
 493                  * same value since only the correct one will be used :-).
 494                  */
 495                 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 496                                 exp_label,exp_label_len,
 497                                 s->s3->client_random,SSL3_RANDOM_SIZE,
 498                                 s->s3->server_random,SSL3_RANDOM_SIZE,
 499                                 NULL,0,NULL,0,
 500                                 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
 501                         goto err2;
 502                 key=tmp1;
 503
 504                 if (k > 0)
 505                         {
 506                         if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 507                                         TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
 508                                         s->s3->client_random,SSL3_RANDOM_SIZE,
 509                                         s->s3->server_random,SSL3_RANDOM_SIZE,
 510                                         NULL,0,NULL,0,
 511                                         empty,0,iv1,iv2,k*2))
 512                                 goto err2;
 513                         if (client_write)
 514                                 iv=iv1;
 515                         else
 516                                 iv= &(iv1[k]);
 517                         }
 518                 }
 519
 520         s->session->key_arg_length=0;
 521 #ifdef KSSL_DEBUG
 522         {
 523         int i;
 524         printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
 525         printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
 526         printf("\n");
 527         printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
 528         printf("\n");
 529         }
 530 #endif  /* KSSL_DEBUG */
 531
 532         EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
 533 #ifdef TLS_DEBUG
 534 printf("which = %04X\nkey=",which);
 535 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
 536 printf("\niv=");
 537 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
 538 printf("\n");
 539 #endif
 540
 541         OPENSSL_cleanse(tmp1,sizeof(tmp1));
 542         OPENSSL_cleanse(tmp2,sizeof(tmp1));
 543         OPENSSL_cleanse(iv1,sizeof(iv1));
 544         OPENSSL_cleanse(iv2,sizeof(iv2));
 545         return(1);
 546 err:
 547         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
 548 err2:
 549         return(0);
 550         }
 551
 552 int tls1_setup_key_block(SSL *s)
 553         {
 554         unsigned char *p1,*p2=NULL;
 555         const EVP_CIPHER *c;
 556         const EVP_MD *hash;
 557         int num;
 558         SSL_COMP *comp;
 559         int mac_type= NID_undef,mac_secret_size=0;
 560         int ret=0;
 561
 562 #ifdef KSSL_DEBUG
 563         printf ("tls1_setup_key_block()\n");
 564 #endif  /* KSSL_DEBUG */
 565
 566         if (s->s3->tmp.key_block_length != 0)
 567                 return(1);
 568
 569         if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
 570                 {
 571                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 572                 return(0);
 573                 }
 574
 575         s->s3->tmp.new_sym_enc=c;
 576         s->s3->tmp.new_hash=hash;
 577         s->s3->tmp.new_mac_pkey_type = mac_type;
 578         s->s3->tmp.new_mac_secret_size = mac_secret_size;
 579         num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
 580         num*=2;
 581
 582         ssl3_cleanup_key_block(s);
 583
 584         if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 585                 {
 586                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 587                 goto err;
 588                 }
 589
 590         s->s3->tmp.key_block_length=num;
 591         s->s3->tmp.key_block=p1;
 592
 593         if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 594                 {
 595                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 596                 goto err;
 597                 }
 598
 599 #ifdef TLS_DEBUG
 600 printf("client random\n");
 601 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
 602 printf("server random\n");
 603 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
 604 printf("pre-master\n");
 605 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
 606 #endif
 607         if (!tls1_generate_key_block(s,p1,p2,num))
 608                 goto err;
 609 #ifdef TLS_DEBUG
 610 printf("\nkey block\n");
 611 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
 612 #endif
 613
 614         if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
 615                 {
 616                 /* enable vulnerability countermeasure for CBC ciphers with
 617                  * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 618                  */
 619                 s->s3->need_empty_fragments = 1;
 620
 621                 if (s->session->cipher != NULL)
 622                         {
 623                         if (s->session->cipher->algorithm_enc == SSL_eNULL)
 624                                 s->s3->need_empty_fragments = 0;
 625
 626 #ifndef OPENSSL_NO_RC4
 627                         if (s->session->cipher->algorithm_enc == SSL_RC4)
 628                                 s->s3->need_empty_fragments = 0;
 629 #endif
 630                         }
 631                 }
 632
 633         ret = 1;
 634 err:
 635         if (p2)
 636                 {
 637                 OPENSSL_cleanse(p2,num);
 638                 OPENSSL_free(p2);
 639                 }
 640         return(ret);
 641         }
 642
 643 int tls1_enc(SSL *s, int send)
 644         {
 645         SSL3_RECORD *rec;
 646         EVP_CIPHER_CTX *ds;
 647         unsigned long l;
 648         int bs,i,ii,j,k,n=0;
 649         const EVP_CIPHER *enc;
 650
 651         if (send)
 652                 {
 653                 if (EVP_MD_CTX_md(s->write_hash))
 654                         {
 655                         n=EVP_MD_CTX_size(s->write_hash);
 656                         OPENSSL_assert(n >= 0);
 657                         }
 658                 ds=s->enc_write_ctx;
 659                 rec= &(s->s3->wrec);
 660                 if (s->enc_write_ctx == NULL)
 661                         enc=NULL;
 662                 else
 663                         {
 664                         int ivlen;
 665                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
 666                         /* For TLSv1.1 and later explicit IV */
 667                         if (s->version >= TLS1_1_VERSION)
 668                                 ivlen = EVP_CIPHER_iv_length(enc);
 669                         else
 670                                 ivlen = 0;
 671                         if (ivlen > 1)
 672                                 {
 673                                 if ( rec->data != rec->input)
 674                                 /* we can't write into the input stream:
 675                                  * Can this ever happen?? (steve)
 676                                  */
 677                                 fprintf(stderr,
 678                                         "%s:%d: rec->data != rec->input\n",
 679                                         __FILE__, __LINE__);
 680                                 else if (RAND_bytes(rec->input, ivlen) <= 0)
 681                                         return -1;
 682                                 }
 683                         }
 684                 }
 685         else
 686                 {
 687                 if (EVP_MD_CTX_md(s->read_hash))
 688                         {
 689                         n=EVP_MD_CTX_size(s->read_hash);
 690                         OPENSSL_assert(n >= 0);
 691                         }
 692                 ds=s->enc_read_ctx;
 693                 rec= &(s->s3->rrec);
 694                 if (s->enc_read_ctx == NULL)
 695                         enc=NULL;
 696                 else
 697                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
 698                 }
 699
 700 #ifdef KSSL_DEBUG
 701         printf("tls1_enc(%d)\n", send);
 702 #endif    /* KSSL_DEBUG */
 703
 704         if ((s->session == NULL) || (ds == NULL) ||
 705                 (enc == NULL))
 706                 {
 707                 memmove(rec->data,rec->input,rec->length);
 708                 rec->input=rec->data;
 709                 }
 710         else
 711                 {
 712                 l=rec->length;
 713                 bs=EVP_CIPHER_block_size(ds->cipher);
 714
 715                 if ((bs != 1) && send)
 716                         {
 717                         i=bs-((int)l%bs);
 718
 719                         /* Add weird padding of upto 256 bytes */
 720
 721                         /* we need to add 'i' padding bytes of value j */
 722                         j=i-1;
 723                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
 724                                 {
 725                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 726                                         j++;
 727                                 }
 728                         for (k=(int)l; k<(int)(l+i); k++)
 729                                 rec->input[k]=j;
 730                         l+=i;
 731                         rec->length+=i;
 732                         }
 733
 734 #ifdef KSSL_DEBUG
 735                 {
 736                 unsigned long ui;
 737                 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
 738                         ds,rec->data,rec->input,l);
 739                 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
 740                         ds->buf_len, ds->cipher->key_len,
 741                         DES_KEY_SZ, DES_SCHEDULE_SZ,
 742                         ds->cipher->iv_len);
 743                 printf("\t\tIV: ");
 744                 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
 745                 printf("\n");
 746                 printf("\trec->input=");
 747                 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
 748                 printf("\n");
 749                 }
 750 #endif  /* KSSL_DEBUG */
 751
 752                 if (!send)
 753                         {
 754                         if (l == 0 || l%bs != 0)
 755                                 {
 756                                 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
 757                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
 758                                 return 0;
 759                                 }
 760                         }
 761
 762                 EVP_Cipher(ds,rec->data,rec->input,l);
 763
 764 #ifdef KSSL_DEBUG
 765                 {
 766                 unsigned long i;
 767                 printf("\trec->data=");
 768                 for (i=0; i<l; i++)
 769                         printf(" %02x", rec->data[i]);  printf("\n");
 770                 }
 771 #endif  /* KSSL_DEBUG */
 772
 773                 if ((bs != 1) && !send)
 774                         {
 775                         ii=i=rec->data[l-1]; /* padding_length */
 776                         i++;
 777                         /* NB: if compression is in operation the first packet
 778                          * may not be of even length so the padding bug check
 779                          * cannot be performed. This bug workaround has been
 780                          * around since SSLeay so hopefully it is either fixed
 781                          * now or no buggy implementation supports compression
 782                          * [steve]
 783                          */
 784                         if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
 785                                 && !s->expand)
 786                                 {
 787                                 /* First packet is even in size, so check */
 788                                 if ((memcmp(s->s3->read_sequence,
 789                                         "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
 790                                         s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
 791                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 792                                         i--;
 793                                 }
 794                         /* TLS 1.0 does not bound the number of padding bytes by the block size.
 795                          * All of them must have value 'padding_length'. */
 796                         if (i > (int)rec->length)
 797                                 {
 798                                 /* Incorrect padding. SSLerr() and ssl3_alert are done
 799                                  * by caller: we don't want to reveal whether this is
 800                                  * a decryption error or a MAC verification failure
 801                                  * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
 802                                 return -1;
 803                                 }
 804                         for (j=(int)(l-i); j<(int)l; j++)
 805                                 {
 806                                 if (rec->data[j] != ii)
 807                                         {
 808                                         /* Incorrect padding */
 809                                         return -1;
 810                                         }
 811                                 }
 812                         rec->length -=i;
 813                         if (s->version >= TLS1_1_VERSION)
 814                                 {
 815                                 rec->data += bs;    /* skip the explicit IV */
 816                                 rec->input += bs;
 817                                 rec->length -= bs;
 818                                 }
 819                         }
 820                 }
 821         return(1);
 822         }
 823 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
 824         {
 825         unsigned int ret;
 826         EVP_MD_CTX ctx, *d=NULL;
 827         int i;
 828
 829         if (s->s3->handshake_buffer)
 830                 if (!ssl3_digest_cached_records(s))
 831                         return 0;
 832
 833         for (i=0;i<SSL_MAX_DIGEST;i++)
 834                 {
 835                   if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
 836                         {
 837                         d=s->s3->handshake_dgst[i];
 838                         break;
 839                         }
 840                 }
 841         if (!d) {
 842                 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
 843                 return 0;
 844         }
 845
 846         EVP_MD_CTX_init(&ctx);
 847         EVP_MD_CTX_copy_ex(&ctx,d);
 848         EVP_DigestFinal_ex(&ctx,out,&ret);
 849         EVP_MD_CTX_cleanup(&ctx);
 850         return((int)ret);
 851         }
 852
 853 int tls1_final_finish_mac(SSL *s,
 854              const char *str, int slen, unsigned char *out)
 855         {
 856         unsigned int i;
 857         EVP_MD_CTX ctx;
 858         unsigned char buf[2*EVP_MAX_MD_SIZE];
 859         unsigned char *q,buf2[12];
 860         int idx;
 861         long mask;
 862         int err=0;
 863         const EVP_MD *md;
 864
 865         q=buf;
 866
 867         if (s->s3->handshake_buffer)
 868                 if (!ssl3_digest_cached_records(s))
 869                         return 0;
 870
 871         EVP_MD_CTX_init(&ctx);
 872
 873         for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
 874                 {
 875                 if (mask & s->s3->tmp.new_cipher->algorithm2)
 876                         {
 877                         int hashsize = EVP_MD_size(md);
 878                         if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
 879                                 {
 880                                 /* internal error: 'buf' is too small for this cipersuite! */
 881                                 err = 1;
 882                                 }
 883                         else
 884                                 {
 885                                 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
 886                                 EVP_DigestFinal_ex(&ctx,q,&i);
 887                                 if (i != (unsigned int)hashsize) /* can't really happen */
 888                                         err = 1;
 889                                 q+=i;
 890                                 }
 891                         }
 892                 }
 893
 894         if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 895                         str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
 896                         s->session->master_key,s->session->master_key_length,
 897                         out,buf2,sizeof buf2))
 898                 err = 1;
 899         EVP_MD_CTX_cleanup(&ctx);
 900
 901         if (err)
 902                 return 0;
 903         else
 904                 return sizeof buf2;
 905         }
 906
 907 int tls1_mac(SSL *ssl, unsigned char *md, int send)
 908         {
 909         SSL3_RECORD *rec;
 910         unsigned char *mac_sec,*seq;
 911         EVP_MD_CTX *hash;
 912         size_t md_size;
 913         int i;
 914         EVP_MD_CTX hmac, *mac_ctx;
 915         unsigned char buf[5];
 916         int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
 917         int t;
 918
 919         if (send)
 920                 {
 921                 rec= &(ssl->s3->wrec);
 922                 mac_sec= &(ssl->s3->write_mac_secret[0]);
 923                 seq= &(ssl->s3->write_sequence[0]);
 924                 hash=ssl->write_hash;
 925                 }
 926         else
 927                 {
 928                 rec= &(ssl->s3->rrec);
 929                 mac_sec= &(ssl->s3->read_mac_secret[0]);
 930                 seq= &(ssl->s3->read_sequence[0]);
 931                 hash=ssl->read_hash;
 932                 }
 933
 934         t=EVP_MD_CTX_size(hash);
 935         OPENSSL_assert(t >= 0);
 936         md_size=t;
 937
 938         buf[0]=rec->type;
 939         buf[1]=(unsigned char)(ssl->version>>8);
 940         buf[2]=(unsigned char)(ssl->version);
 941         buf[3]=rec->length>>8;
 942         buf[4]=rec->length&0xff;
 943
 944         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
 945         if (stream_mac)
 946                 {
 947                         mac_ctx = hash;
 948                 }
 949                 else
 950                 {
 951                         EVP_MD_CTX_copy(&hmac,hash);
 952                         mac_ctx = &hmac;
 953                 }
 954
 955         if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
 956                 {
 957                 unsigned char dtlsseq[8],*p=dtlsseq;
 958
 959                 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
 960                 memcpy (p,&seq[2],6);
 961
 962                 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
 963                 }
 964         else
 965                 EVP_DigestSignUpdate(mac_ctx,seq,8);
 966
 967         EVP_DigestSignUpdate(mac_ctx,buf,5);
 968         EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
 969         t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
 970         OPENSSL_assert(t > 0);
 971
 972         if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
 973 #ifdef TLS_DEBUG
 974 printf("sec=");
 975 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
 976 printf("seq=");
 977 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
 978 printf("buf=");
 979 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
 980 printf("rec=");
 981 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
 982 #endif
 983
 984         if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
 985                 {
 986                 for (i=7; i>=0; i--)
 987                         {
 988                         ++seq[i];
 989                         if (seq[i] != 0) break;
 990                         }
 991                 }
 992
 993 #ifdef TLS_DEBUG
 994 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
 995 #endif
 996         return(md_size);
 997         }
 998
 999 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1000              int len)
1001         {
1002         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1003         const void *co = NULL, *so = NULL;
1004         int col = 0, sol = 0;
1005
1006 #ifdef KSSL_DEBUG
1007         printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1008 #endif  /* KSSL_DEBUG */
1009
1010 #ifdef TLSEXT_TYPE_opaque_prf_input
1011         if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1012             s->s3->client_opaque_prf_input_len > 0 &&
1013             s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1014                 {
1015                 co = s->s3->client_opaque_prf_input;
1016                 col = s->s3->server_opaque_prf_input_len;
1017                 so = s->s3->server_opaque_prf_input;
1018                 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) */
1019                 }
1020 #endif
1021
1022         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
1023                 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1024                 s->s3->client_random,SSL3_RANDOM_SIZE,
1025                 co, col,
1026                 s->s3->server_random,SSL3_RANDOM_SIZE,
1027                 so, sol,
1028                 p,len,
1029                 s->session->master_key,buff,sizeof buff);
1030
1031 #ifdef KSSL_DEBUG
1032         printf ("tls1_generate_master_secret() complete\n");
1033 #endif  /* KSSL_DEBUG */
1034         return(SSL3_MASTER_SECRET_SIZE);
1035         }
1036
1037 int tls1_alert_code(int code)
1038         {
1039         switch (code)
1040                 {
1041         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
1042         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1043         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
1044         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
1045         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
1046         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1047         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
1048         case SSL_AD_NO_CERTIFICATE:     return(-1);
1049         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
1050         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1051         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1052         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1053         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1054         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
1055         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
1056         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
1057         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
1058         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
1059         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1060         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
1061         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1062         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
1063         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
1064         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
1065         case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1066         case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1067         case SSL_AD_UNRECOGNIZED_NAME:  return(TLS1_AD_UNRECOGNIZED_NAME);
1068         case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1069         case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1070         case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1071 #if 0 /* not appropriate for TLS, not used for DTLS */
1072         case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1073                                           (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1074 #endif
1075         default:                        return(-1);
1076                 }
1077         }
1078