ssl/t1_enc.c

   1 /* ssl/t1_enc.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111 /* ====================================================================
 112  * Copyright 2005 Nokia. All rights reserved.
 113  *
 114  * The portions of the attached software ("Contribution") is developed by
 115  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 116  * license.
 117  *
 118  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 119  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 120  * support (see RFC 4279) to OpenSSL.
 121  *
 122  * No patent licenses or other rights except those expressly stated in
 123  * the OpenSSL open source license shall be deemed granted or received
 124  * expressly, by implication, estoppel, or otherwise.
 125  *
 126  * No assurances are provided by Nokia that the Contribution does not
 127  * infringe the patent or other intellectual property rights of any third
 128  * party or that the license provides you with all the necessary rights
 129  * to make use of the Contribution.
 130  *
 131  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 132  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 133  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 134  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 135  * OTHERWISE.
 136  */
 137
 138 #include <stdio.h>
 139 #include "ssl_locl.h"
 140 #ifndef OPENSSL_NO_COMP
 141 #include <openssl/comp.h>
 142 #endif
 143 #include <openssl/evp.h>
 144 #include <openssl/hmac.h>
 145 #include <openssl/md5.h>
 146 #ifdef KSSL_DEBUG
 147 #include <openssl/des.h>
 148 #endif
 149
 150 /* seed1 through seed5 are virtually concatenated */
 151 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
 152                         int sec_len,
 153                         const void *seed1, int seed1_len,
 154                         const void *seed2, int seed2_len,
 155                         const void *seed3, int seed3_len,
 156                         const void *seed4, int seed4_len,
 157                         const void *seed5, int seed5_len,
 158                         unsigned char *out, int olen)
 159         {
 160         int chunk;
 161         unsigned int j;
 162         HMAC_CTX ctx;
 163         HMAC_CTX ctx_tmp;
 164         unsigned char A1[EVP_MAX_MD_SIZE];
 165         unsigned int A1_len;
 166         int ret = 0;
 167
 168         chunk=EVP_MD_size(md);
 169         OPENSSL_assert(chunk >= 0);
 170
 171         HMAC_CTX_init(&ctx);
 172         HMAC_CTX_init(&ctx_tmp);
 173         if (!HMAC_Init_ex(&ctx,sec,sec_len,md, NULL))
 174                 goto err;
 175         if (!HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL))
 176                 goto err;
 177         if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
 178                 goto err;
 179         if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
 180                 goto err;
 181         if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
 182                 goto err;
 183         if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
 184                 goto err;
 185         if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
 186                 goto err;
 187         if (!HMAC_Final(&ctx,A1,&A1_len))
 188                 goto err;
 189
 190         for (;;)
 191                 {
 192                 if (!HMAC_Init_ex(&ctx,NULL,0,NULL,NULL)) /* re-init */
 193                         goto err;
 194                 if (!HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL)) /* re-init */
 195                         goto err;
 196                 if (!HMAC_Update(&ctx,A1,A1_len))
 197                         goto err;
 198                 if (!HMAC_Update(&ctx_tmp,A1,A1_len))
 199                         goto err;
 200                 if (seed1 != NULL && !HMAC_Update(&ctx,seed1,seed1_len))
 201                         goto err;
 202                 if (seed2 != NULL && !HMAC_Update(&ctx,seed2,seed2_len))
 203                         goto err;
 204                 if (seed3 != NULL && !HMAC_Update(&ctx,seed3,seed3_len))
 205                         goto err;
 206                 if (seed4 != NULL && !HMAC_Update(&ctx,seed4,seed4_len))
 207                         goto err;
 208                 if (seed5 != NULL && !HMAC_Update(&ctx,seed5,seed5_len))
 209                         goto err;
 210
 211                 if (olen > chunk)
 212                         {
 213                         if (!HMAC_Final(&ctx,out,&j))
 214                                 goto err;
 215                         out+=j;
 216                         olen-=j;
 217                         if (!HMAC_Final(&ctx_tmp,A1,&A1_len)) /* calc the next A1 value */
 218                                 goto err;
 219                         }
 220                 else    /* last one */
 221                         {
 222                         if (!HMAC_Final(&ctx,A1,&A1_len))
 223                                 goto err;
 224                         memcpy(out,A1,olen);
 225                         break;
 226                         }
 227                 }
 228         ret = 1;
 229 err:
 230         HMAC_CTX_cleanup(&ctx);
 231         HMAC_CTX_cleanup(&ctx_tmp);
 232         OPENSSL_cleanse(A1,sizeof(A1));
 233         return ret;
 234         }
 235
 236 /* seed1 through seed5 are virtually concatenated */
 237 static int tls1_PRF(long digest_mask,
 238                      const void *seed1, int seed1_len,
 239                      const void *seed2, int seed2_len,
 240                      const void *seed3, int seed3_len,
 241                      const void *seed4, int seed4_len,
 242                      const void *seed5, int seed5_len,
 243                      const unsigned char *sec, int slen,
 244                      unsigned char *out1,
 245                      unsigned char *out2, int olen)
 246         {
 247         int len,i,idx,count;
 248         const unsigned char *S1;
 249         long m;
 250         const EVP_MD *md;
 251         int ret = 0;
 252
 253         /* Count number of digests and partition sec evenly */
 254         count=0;
 255         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 256                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
 257         }
 258         len=slen/count;
 259         S1=sec;
 260         memset(out1,0,olen);
 261         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 262                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
 263                         if (!md) {
 264                                 SSLerr(SSL_F_TLS1_PRF,
 265                                 SSL_R_UNSUPPORTED_DIGEST_TYPE);
 266                                 goto err;
 267                         }
 268                         if (!tls1_P_hash(md ,S1,len+(slen&1),
 269                                         seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
 270                                         out2,olen))
 271                                 goto err;
 272                         S1+=len;
 273                         for (i=0; i<olen; i++)
 274                         {
 275                                 out1[i]^=out2[i];
 276                         }
 277                 }
 278         }
 279         ret = 1;
 280 err:
 281         return ret;
 282 }
 283 static int tls1_generate_key_block(SSL *s, unsigned char *km,
 284              unsigned char *tmp, int num)
 285         {
 286         int ret;
 287         ret = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 288                  TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
 289                  s->s3->server_random,SSL3_RANDOM_SIZE,
 290                  s->s3->client_random,SSL3_RANDOM_SIZE,
 291                  NULL,0,NULL,0,
 292                  s->session->master_key,s->session->master_key_length,
 293                  km,tmp,num);
 294 #ifdef KSSL_DEBUG
 295         printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
 296                 s->session->master_key_length);
 297         {
 298         int i;
 299         for (i=0; i < s->session->master_key_length; i++)
 300                 {
 301                 printf("%02X", s->session->master_key[i]);
 302                 }
 303         printf("\n");  }
 304 #endif    /* KSSL_DEBUG */
 305         return ret;
 306         }
 307
 308 int tls1_change_cipher_state(SSL *s, int which)
 309         {
 310         static const unsigned char empty[]="";
 311         unsigned char *p,*mac_secret;
 312         unsigned char *exp_label;
 313         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
 314         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
 315         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
 316         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
 317         unsigned char *ms,*key,*iv;
 318         int client_write;
 319         EVP_CIPHER_CTX *dd;
 320         const EVP_CIPHER *c;
 321 #ifndef OPENSSL_NO_COMP
 322         const SSL_COMP *comp;
 323 #endif
 324         const EVP_MD *m;
 325         int mac_type;
 326         int *mac_secret_size;
 327         EVP_MD_CTX *mac_ctx;
 328         EVP_PKEY *mac_key;
 329         int is_export,n,i,j,k,exp_label_len,cl;
 330         int reuse_dd = 0;
 331
 332         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
 333         c=s->s3->tmp.new_sym_enc;
 334         m=s->s3->tmp.new_hash;
 335         mac_type = s->s3->tmp.new_mac_pkey_type;
 336 #ifndef OPENSSL_NO_COMP
 337         comp=s->s3->tmp.new_compression;
 338 #endif
 339
 340 #ifdef KSSL_DEBUG
 341         printf("tls1_change_cipher_state(which= %d) w/\n", which);
 342         printf("\talg= %ld/%ld, comp= %p\n",
 343                s->s3->tmp.new_cipher->algorithm_mkey,
 344                s->s3->tmp.new_cipher->algorithm_auth,
 345                comp);
 346         printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
 347         printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
 348                 c->nid,c->block_size,c->key_len,c->iv_len);
 349         printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
 350         {
 351         int i;
 352         for (i=0; i<s->s3->tmp.key_block_length; i++)
 353                 printf("%02x", key_block[i]);  printf("\n");
 354         }
 355 #endif  /* KSSL_DEBUG */
 356
 357         if (which & SSL3_CC_READ)
 358                 {
 359                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 360                         s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
 361                         else
 362                         s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 363
 364                 if (s->enc_read_ctx != NULL)
 365                         reuse_dd = 1;
 366                 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 367                         goto err;
 368                 else
 369                         /* make sure it's intialized in case we exit later with an error */
 370                         EVP_CIPHER_CTX_init(s->enc_read_ctx);
 371                 dd= s->enc_read_ctx;
 372                 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
 373 #ifndef OPENSSL_NO_COMP
 374                 if (s->expand != NULL)
 375                         {
 376                         COMP_CTX_free(s->expand);
 377                         s->expand=NULL;
 378                         }
 379                 if (comp != NULL)
 380                         {
 381                         s->expand=COMP_CTX_new(comp->method);
 382                         if (s->expand == NULL)
 383                                 {
 384                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 385                                 goto err2;
 386                                 }
 387                         if (s->s3->rrec.comp == NULL)
 388                                 s->s3->rrec.comp=(unsigned char *)
 389                                         OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
 390                         if (s->s3->rrec.comp == NULL)
 391                                 goto err;
 392                         }
 393 #endif
 394                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 395                 if (s->version != DTLS1_VERSION)
 396                         memset(&(s->s3->read_sequence[0]),0,8);
 397                 mac_secret= &(s->s3->read_mac_secret[0]);
 398                 mac_secret_size=&(s->s3->read_mac_secret_size);
 399                 }
 400         else
 401                 {
 402                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 403                         s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
 404                         else
 405                         s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
 406                 if (s->enc_write_ctx != NULL)
 407                         reuse_dd = 1;
 408                 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 409                         goto err;
 410                 else
 411                         /* make sure it's intialized in case we exit later with an error */
 412                         EVP_CIPHER_CTX_init(s->enc_write_ctx);
 413                 dd= s->enc_write_ctx;
 414                 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
 415 #ifndef OPENSSL_NO_COMP
 416                 if (s->compress != NULL)
 417                         {
 418                         COMP_CTX_free(s->compress);
 419                         s->compress=NULL;
 420                         }
 421                 if (comp != NULL)
 422                         {
 423                         s->compress=COMP_CTX_new(comp->method);
 424                         if (s->compress == NULL)
 425                                 {
 426                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 427                                 goto err2;
 428                                 }
 429                         }
 430 #endif
 431                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 432                 if (s->version != DTLS1_VERSION)
 433                         memset(&(s->s3->write_sequence[0]),0,8);
 434                 mac_secret= &(s->s3->write_mac_secret[0]);
 435                 mac_secret_size = &(s->s3->write_mac_secret_size);
 436                 }
 437
 438         if (reuse_dd)
 439                 EVP_CIPHER_CTX_cleanup(dd);
 440
 441         p=s->s3->tmp.key_block;
 442         i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
 443
 444         cl=EVP_CIPHER_key_length(c);
 445         j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
 446                        cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
 447         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
 448         k=EVP_CIPHER_iv_length(c);
 449         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 450                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
 451                 {
 452                 ms=  &(p[ 0]); n=i+i;
 453                 key= &(p[ n]); n+=j+j;
 454                 iv=  &(p[ n]); n+=k+k;
 455                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
 456                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
 457                 client_write=1;
 458                 }
 459         else
 460                 {
 461                 n=i;
 462                 ms=  &(p[ n]); n+=i+j;
 463                 key= &(p[ n]); n+=j+k;
 464                 iv=  &(p[ n]); n+=k;
 465                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
 466                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
 467                 client_write=0;
 468                 }
 469
 470         if (n > s->s3->tmp.key_block_length)
 471                 {
 472                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
 473                 goto err2;
 474                 }
 475
 476         memcpy(mac_secret,ms,i);
 477         mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
 478                         mac_secret,*mac_secret_size);
 479         EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
 480         EVP_PKEY_free(mac_key);
 481 #ifdef TLS_DEBUG
 482 printf("which = %04X\nmac key=",which);
 483 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
 484 #endif
 485         if (is_export)
 486                 {
 487                 /* In here I set both the read and write key/iv to the
 488                  * same value since only the correct one will be used :-).
 489                  */
 490                 if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 491                                 exp_label,exp_label_len,
 492                                 s->s3->client_random,SSL3_RANDOM_SIZE,
 493                                 s->s3->server_random,SSL3_RANDOM_SIZE,
 494                                 NULL,0,NULL,0,
 495                                 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
 496                         goto err2;
 497                 key=tmp1;
 498
 499                 if (k > 0)
 500                         {
 501                         if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 502                                         TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
 503                                         s->s3->client_random,SSL3_RANDOM_SIZE,
 504                                         s->s3->server_random,SSL3_RANDOM_SIZE,
 505                                         NULL,0,NULL,0,
 506                                         empty,0,iv1,iv2,k*2))
 507                                 goto err2;
 508                         if (client_write)
 509                                 iv=iv1;
 510                         else
 511                                 iv= &(iv1[k]);
 512                         }
 513                 }
 514
 515         s->session->key_arg_length=0;
 516 #ifdef KSSL_DEBUG
 517         {
 518         int i;
 519         printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
 520         printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
 521         printf("\n");
 522         printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
 523         printf("\n");
 524         }
 525 #endif  /* KSSL_DEBUG */
 526
 527         EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
 528 #ifdef TLS_DEBUG
 529 printf("which = %04X\nkey=",which);
 530 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
 531 printf("\niv=");
 532 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
 533 printf("\n");
 534 #endif
 535
 536         OPENSSL_cleanse(tmp1,sizeof(tmp1));
 537         OPENSSL_cleanse(tmp2,sizeof(tmp1));
 538         OPENSSL_cleanse(iv1,sizeof(iv1));
 539         OPENSSL_cleanse(iv2,sizeof(iv2));
 540         return(1);
 541 err:
 542         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
 543 err2:
 544         return(0);
 545         }
 546
 547 int tls1_setup_key_block(SSL *s)
 548         {
 549         unsigned char *p1,*p2=NULL;
 550         const EVP_CIPHER *c;
 551         const EVP_MD *hash;
 552         int num;
 553         SSL_COMP *comp;
 554         int mac_type= NID_undef,mac_secret_size=0;
 555         int ret=0;
 556
 557 #ifdef KSSL_DEBUG
 558         printf ("tls1_setup_key_block()\n");
 559 #endif  /* KSSL_DEBUG */
 560
 561         if (s->s3->tmp.key_block_length != 0)
 562                 return(1);
 563
 564         if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
 565                 {
 566                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 567                 return(0);
 568                 }
 569
 570         s->s3->tmp.new_sym_enc=c;
 571         s->s3->tmp.new_hash=hash;
 572         s->s3->tmp.new_mac_pkey_type = mac_type;
 573         s->s3->tmp.new_mac_secret_size = mac_secret_size;
 574         num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
 575         num*=2;
 576
 577         ssl3_cleanup_key_block(s);
 578
 579         if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 580                 {
 581                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 582                 goto err;
 583                 }
 584
 585         s->s3->tmp.key_block_length=num;
 586         s->s3->tmp.key_block=p1;
 587
 588         if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 589                 {
 590                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 591                 goto err;
 592                 }
 593
 594 #ifdef TLS_DEBUG
 595 printf("client random\n");
 596 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
 597 printf("server random\n");
 598 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
 599 printf("pre-master\n");
 600 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
 601 #endif
 602         if (!tls1_generate_key_block(s,p1,p2,num))
 603                 goto err;
 604 #ifdef TLS_DEBUG
 605 printf("\nkey block\n");
 606 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
 607 #endif
 608
 609         if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
 610                 {
 611                 /* enable vulnerability countermeasure for CBC ciphers with
 612                  * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 613                  */
 614                 s->s3->need_empty_fragments = 1;
 615
 616                 if (s->session->cipher != NULL)
 617                         {
 618                         if (s->session->cipher->algorithm_enc == SSL_eNULL)
 619                                 s->s3->need_empty_fragments = 0;
 620
 621 #ifndef OPENSSL_NO_RC4
 622                         if (s->session->cipher->algorithm_enc == SSL_RC4)
 623                                 s->s3->need_empty_fragments = 0;
 624 #endif
 625                         }
 626                 }
 627
 628         ret = 1;
 629 err:
 630         if (p2)
 631                 {
 632                 OPENSSL_cleanse(p2,num);
 633                 OPENSSL_free(p2);
 634                 }
 635         return(ret);
 636         }
 637
 638 int tls1_enc(SSL *s, int send)
 639         {
 640         SSL3_RECORD *rec;
 641         EVP_CIPHER_CTX *ds;
 642         unsigned long l;
 643         int bs,i,ii,j,k,n=0;
 644         const EVP_CIPHER *enc;
 645
 646         if (send)
 647                 {
 648                 if (EVP_MD_CTX_md(s->write_hash))
 649                         {
 650                         n=EVP_MD_CTX_size(s->write_hash);
 651                         OPENSSL_assert(n >= 0);
 652                         }
 653                 ds=s->enc_write_ctx;
 654                 rec= &(s->s3->wrec);
 655                 if (s->enc_write_ctx == NULL)
 656                         enc=NULL;
 657                 else
 658                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
 659                 }
 660         else
 661                 {
 662                 if (EVP_MD_CTX_md(s->read_hash))
 663                         {
 664                         n=EVP_MD_CTX_size(s->read_hash);
 665                         OPENSSL_assert(n >= 0);
 666                         }
 667                 ds=s->enc_read_ctx;
 668                 rec= &(s->s3->rrec);
 669                 if (s->enc_read_ctx == NULL)
 670                         enc=NULL;
 671                 else
 672                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
 673                 }
 674
 675 #ifdef KSSL_DEBUG
 676         printf("tls1_enc(%d)\n", send);
 677 #endif    /* KSSL_DEBUG */
 678
 679         if ((s->session == NULL) || (ds == NULL) ||
 680                 (enc == NULL))
 681                 {
 682                 memmove(rec->data,rec->input,rec->length);
 683                 rec->input=rec->data;
 684                 }
 685         else
 686                 {
 687                 l=rec->length;
 688                 bs=EVP_CIPHER_block_size(ds->cipher);
 689
 690                 if ((bs != 1) && send)
 691                         {
 692                         i=bs-((int)l%bs);
 693
 694                         /* Add weird padding of upto 256 bytes */
 695
 696                         /* we need to add 'i' padding bytes of value j */
 697                         j=i-1;
 698                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
 699                                 {
 700                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 701                                         j++;
 702                                 }
 703                         for (k=(int)l; k<(int)(l+i); k++)
 704                                 rec->input[k]=j;
 705                         l+=i;
 706                         rec->length+=i;
 707                         }
 708
 709 #ifdef KSSL_DEBUG
 710                 {
 711                 unsigned long ui;
 712                 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
 713                         ds,rec->data,rec->input,l);
 714                 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
 715                         ds->buf_len, ds->cipher->key_len,
 716                         DES_KEY_SZ, DES_SCHEDULE_SZ,
 717                         ds->cipher->iv_len);
 718                 printf("\t\tIV: ");
 719                 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
 720                 printf("\n");
 721                 printf("\trec->input=");
 722                 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
 723                 printf("\n");
 724                 }
 725 #endif  /* KSSL_DEBUG */
 726
 727                 if (!send)
 728                         {
 729                         if (l == 0 || l%bs != 0)
 730                                 {
 731                                 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
 732                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
 733                                 return 0;
 734                                 }
 735                         }
 736
 737                 EVP_Cipher(ds,rec->data,rec->input,l);
 738
 739 #ifdef KSSL_DEBUG
 740                 {
 741                 unsigned long i;
 742                 printf("\trec->data=");
 743                 for (i=0; i<l; i++)
 744                         printf(" %02x", rec->data[i]);  printf("\n");
 745                 }
 746 #endif  /* KSSL_DEBUG */
 747
 748                 if ((bs != 1) && !send)
 749                         {
 750                         ii=i=rec->data[l-1]; /* padding_length */
 751                         i++;
 752                         /* NB: if compression is in operation the first packet
 753                          * may not be of even length so the padding bug check
 754                          * cannot be performed. This bug workaround has been
 755                          * around since SSLeay so hopefully it is either fixed
 756                          * now or no buggy implementation supports compression
 757                          * [steve]
 758                          */
 759                         if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
 760                                 && !s->expand)
 761                                 {
 762                                 /* First packet is even in size, so check */
 763                                 if ((memcmp(s->s3->read_sequence,
 764                                         "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
 765                                         s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
 766                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 767                                         i--;
 768                                 }
 769                         /* TLS 1.0 does not bound the number of padding bytes by the block size.
 770                          * All of them must have value 'padding_length'. */
 771                         if (i > (int)rec->length)
 772                                 {
 773                                 /* Incorrect padding. SSLerr() and ssl3_alert are done
 774                                  * by caller: we don't want to reveal whether this is
 775                                  * a decryption error or a MAC verification failure
 776                                  * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
 777                                 return -1;
 778                                 }
 779                         for (j=(int)(l-i); j<(int)l; j++)
 780                                 {
 781                                 if (rec->data[j] != ii)
 782                                         {
 783                                         /* Incorrect padding */
 784                                         return -1;
 785                                         }
 786                                 }
 787                         rec->length-=i;
 788                         }
 789                 }
 790         return(1);
 791         }
 792 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
 793         {
 794         unsigned int ret;
 795         EVP_MD_CTX ctx, *d=NULL;
 796         int i;
 797
 798         if (s->s3->handshake_buffer)
 799                 if (!ssl3_digest_cached_records(s))
 800                         return 0;
 801
 802         for (i=0;i<SSL_MAX_DIGEST;i++)
 803                 {
 804                   if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
 805                         {
 806                         d=s->s3->handshake_dgst[i];
 807                         break;
 808                         }
 809                 }
 810         if (!d) {
 811                 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
 812                 return 0;
 813         }
 814
 815         EVP_MD_CTX_init(&ctx);
 816         EVP_MD_CTX_copy_ex(&ctx,d);
 817         EVP_DigestFinal_ex(&ctx,out,&ret);
 818         EVP_MD_CTX_cleanup(&ctx);
 819         return((int)ret);
 820         }
 821
 822 int tls1_final_finish_mac(SSL *s,
 823              const char *str, int slen, unsigned char *out)
 824         {
 825         unsigned int i;
 826         EVP_MD_CTX ctx;
 827         unsigned char buf[2*EVP_MAX_MD_SIZE];
 828         unsigned char *q,buf2[12];
 829         int idx;
 830         long mask;
 831         int err=0;
 832         const EVP_MD *md;
 833
 834         q=buf;
 835
 836         if (s->s3->handshake_buffer)
 837                 if (!ssl3_digest_cached_records(s))
 838                         return 0;
 839
 840         EVP_MD_CTX_init(&ctx);
 841
 842         for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
 843                 {
 844                 if (mask & s->s3->tmp.new_cipher->algorithm2)
 845                         {
 846                         int hashsize = EVP_MD_size(md);
 847                         if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
 848                                 {
 849                                 /* internal error: 'buf' is too small for this cipersuite! */
 850                                 err = 1;
 851                                 }
 852                         else
 853                                 {
 854                                 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
 855                                 EVP_DigestFinal_ex(&ctx,q,&i);
 856                                 if (i != (unsigned int)hashsize) /* can't really happen */
 857                                         err = 1;
 858                                 q+=i;
 859                                 }
 860                         }
 861                 }
 862
 863         if (!tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 864                         str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
 865                         s->session->master_key,s->session->master_key_length,
 866                         out,buf2,sizeof buf2))
 867                 err = 1;
 868         EVP_MD_CTX_cleanup(&ctx);
 869
 870         if (err)
 871                 return 0;
 872         else
 873                 return sizeof buf2;
 874         }
 875
 876 int tls1_mac(SSL *ssl, unsigned char *md, int send)
 877         {
 878         SSL3_RECORD *rec;
 879         unsigned char *seq;
 880         EVP_MD_CTX *hash;
 881         size_t md_size;
 882         int i;
 883         EVP_MD_CTX hmac, *mac_ctx;
 884         unsigned char buf[5];
 885         int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
 886         int t;
 887
 888         if (send)
 889                 {
 890                 rec= &(ssl->s3->wrec);
 891                 seq= &(ssl->s3->write_sequence[0]);
 892                 hash=ssl->write_hash;
 893                 }
 894         else
 895                 {
 896                 rec= &(ssl->s3->rrec);
 897                 seq= &(ssl->s3->read_sequence[0]);
 898                 hash=ssl->read_hash;
 899                 }
 900
 901         t=EVP_MD_CTX_size(hash);
 902         OPENSSL_assert(t >= 0);
 903         md_size=t;
 904
 905         buf[0]=rec->type;
 906         buf[1]=(unsigned char)(ssl->version>>8);
 907         buf[2]=(unsigned char)(ssl->version);
 908         buf[3]=rec->length>>8;
 909         buf[4]=rec->length&0xff;
 910
 911         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
 912         if (stream_mac)
 913                 {
 914                         mac_ctx = hash;
 915                 }
 916                 else
 917                 {
 918                         EVP_MD_CTX_copy(&hmac,hash);
 919                         mac_ctx = &hmac;
 920                 }
 921
 922         if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
 923                 {
 924                 unsigned char dtlsseq[8],*p=dtlsseq;
 925
 926                 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
 927                 memcpy (p,&seq[2],6);
 928
 929                 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
 930                 }
 931         else
 932                 EVP_DigestSignUpdate(mac_ctx,seq,8);
 933
 934         EVP_DigestSignUpdate(mac_ctx,buf,5);
 935         EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
 936         t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
 937         OPENSSL_assert(t > 0);
 938
 939         if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
 940 #ifdef TLS_DEBUG
 941 printf("sec=");
 942 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
 943 printf("seq=");
 944 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
 945 printf("buf=");
 946 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
 947 printf("rec=");
 948 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
 949 #endif
 950
 951         if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
 952                 {
 953                 for (i=7; i>=0; i--)
 954                         {
 955                         ++seq[i];
 956                         if (seq[i] != 0) break;
 957                         }
 958                 }
 959
 960 #ifdef TLS_DEBUG
 961 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
 962 #endif
 963         return(md_size);
 964         }
 965
 966 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 967              int len)
 968         {
 969         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
 970         const void *co = NULL, *so = NULL;
 971         int col = 0, sol = 0;
 972
 973 #ifdef KSSL_DEBUG
 974         printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
 975 #endif  /* KSSL_DEBUG */
 976
 977 #ifdef TLSEXT_TYPE_opaque_prf_input
 978         if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
 979             s->s3->client_opaque_prf_input_len > 0 &&
 980             s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
 981                 {
 982                 co = s->s3->client_opaque_prf_input;
 983                 col = s->s3->server_opaque_prf_input_len;
 984                 so = s->s3->server_opaque_prf_input;
 985                 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) */
 986                 }
 987 #endif
 988
 989         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 990                 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
 991                 s->s3->client_random,SSL3_RANDOM_SIZE,
 992                 co, col,
 993                 s->s3->server_random,SSL3_RANDOM_SIZE,
 994                 so, sol,
 995                 p,len,
 996                 s->session->master_key,buff,sizeof buff);
 997
 998 #ifdef KSSL_DEBUG
 999         printf ("tls1_generate_master_secret() complete\n");
1000 #endif  /* KSSL_DEBUG */
1001         return(SSL3_MASTER_SECRET_SIZE);
1002         }
1003
1004 int tls1_alert_code(int code)
1005         {
1006         switch (code)
1007                 {
1008         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
1009         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1010         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
1011         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
1012         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
1013         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1014         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
1015         case SSL_AD_NO_CERTIFICATE:     return(-1);
1016         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
1017         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1018         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1019         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1020         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1021         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
1022         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
1023         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
1024         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
1025         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
1026         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1027         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
1028         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1029         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
1030         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
1031         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
1032         case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1033         case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1034         case SSL_AD_UNRECOGNIZED_NAME:  return(TLS1_AD_UNRECOGNIZED_NAME);
1035         case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1036         case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1037         case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1038 #if 0 /* not appropriate for TLS, not used for DTLS */
1039         case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1040                                           (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1041 #endif
1042         default:                        return(-1);
1043                 }
1044         }
1045