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 void 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
 168         chunk=EVP_MD_size(md);
 169         OPENSSL_assert(chunk >= 0);
 170
 171         HMAC_CTX_init(&ctx);
 172         HMAC_CTX_init(&ctx_tmp);
 173         HMAC_Init_ex(&ctx,sec,sec_len,md, NULL);
 174         HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL);
 175         if (seed1 != NULL) HMAC_Update(&ctx,seed1,seed1_len);
 176         if (seed2 != NULL) HMAC_Update(&ctx,seed2,seed2_len);
 177         if (seed3 != NULL) HMAC_Update(&ctx,seed3,seed3_len);
 178         if (seed4 != NULL) HMAC_Update(&ctx,seed4,seed4_len);
 179         if (seed5 != NULL) HMAC_Update(&ctx,seed5,seed5_len);
 180         HMAC_Final(&ctx,A1,&A1_len);
 181
 182         n=0;
 183         for (;;)
 184                 {
 185                 HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */
 186                 HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */
 187                 HMAC_Update(&ctx,A1,A1_len);
 188                 HMAC_Update(&ctx_tmp,A1,A1_len);
 189                 if (seed1 != NULL) HMAC_Update(&ctx,seed1,seed1_len);
 190                 if (seed2 != NULL) HMAC_Update(&ctx,seed2,seed2_len);
 191                 if (seed3 != NULL) HMAC_Update(&ctx,seed3,seed3_len);
 192                 if (seed4 != NULL) HMAC_Update(&ctx,seed4,seed4_len);
 193                 if (seed5 != NULL) HMAC_Update(&ctx,seed5,seed5_len);
 194
 195                 if (olen > chunk)
 196                         {
 197                         HMAC_Final(&ctx,out,&j);
 198                         out+=j;
 199                         olen-=j;
 200                         HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
 201                         }
 202                 else    /* last one */
 203                         {
 204                         HMAC_Final(&ctx,A1,&A1_len);
 205                         memcpy(out,A1,olen);
 206                         break;
 207                         }
 208                 }
 209         HMAC_CTX_cleanup(&ctx);
 210         HMAC_CTX_cleanup(&ctx_tmp);
 211         OPENSSL_cleanse(A1,sizeof(A1));
 212         }
 213
 214 /* seed1 through seed5 are virtually concatenated */
 215 static void tls1_PRF(long digest_mask,
 216                      const void *seed1, int seed1_len,
 217                      const void *seed2, int seed2_len,
 218                      const void *seed3, int seed3_len,
 219                      const void *seed4, int seed4_len,
 220                      const void *seed5, int seed5_len,
 221                      const unsigned char *sec, int slen,
 222                      unsigned char *out1,
 223                      unsigned char *out2, int olen)
 224         {
 225         int len,i,idx,count;
 226         const unsigned char *S1;
 227         long m;
 228         const EVP_MD *md;
 229
 230         /* Count number of digests and partition sec evenly */
 231         count=0;
 232         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 233                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
 234         }
 235         len=slen/count;
 236         S1=sec;
 237         memset(out1,0,olen);
 238         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 239                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
 240                         if (!md) {
 241                                 SSLerr(SSL_F_TLS1_PRF,
 242                                 SSL_R_UNSUPPORTED_DIGEST_TYPE);
 243                                 return;
 244                         }
 245                         tls1_P_hash(md ,S1,len+(slen&1),
 246                                     seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
 247                                     out2,olen);
 248                         S1+=len;
 249                         for (i=0; i<olen; i++)
 250                         {
 251                                 out1[i]^=out2[i];
 252                         }
 253                 }
 254         }
 255
 256 }
 257 static void tls1_generate_key_block(SSL *s, unsigned char *km,
 258              unsigned char *tmp, int num)
 259         {
 260         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 261                  TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
 262                  s->s3->server_random,SSL3_RANDOM_SIZE,
 263                  s->s3->client_random,SSL3_RANDOM_SIZE,
 264                  NULL,0,NULL,0,
 265                  s->session->master_key,s->session->master_key_length,
 266                  km,tmp,num);
 267 #ifdef KSSL_DEBUG
 268         printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
 269                 s->session->master_key_length);
 270         {
 271         int i;
 272         for (i=0; i < s->session->master_key_length; i++)
 273                 {
 274                 printf("%02X", s->session->master_key[i]);
 275                 }
 276         printf("\n");  }
 277 #endif    /* KSSL_DEBUG */
 278         }
 279
 280 int tls1_change_cipher_state(SSL *s, int which)
 281         {
 282         static const unsigned char empty[]="";
 283         unsigned char *p,*key_block,*mac_secret;
 284         unsigned char *exp_label;
 285         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
 286         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
 287         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
 288         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
 289         unsigned char *ms,*key,*iv,*er1,*er2;
 290         int client_write;
 291         EVP_CIPHER_CTX *dd;
 292         const EVP_CIPHER *c;
 293 #ifndef OPENSSL_NO_COMP
 294         const SSL_COMP *comp;
 295 #endif
 296         const EVP_MD *m;
 297         int mac_type;
 298         int *mac_secret_size;
 299         EVP_MD_CTX *mac_ctx;
 300         EVP_PKEY *mac_key;
 301         int is_export,n,i,j,k,exp_label_len,cl;
 302         int reuse_dd = 0;
 303
 304         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
 305         c=s->s3->tmp.new_sym_enc;
 306         m=s->s3->tmp.new_hash;
 307         mac_type = s->s3->tmp.new_mac_pkey_type;
 308 #ifndef OPENSSL_NO_COMP
 309         comp=s->s3->tmp.new_compression;
 310 #endif
 311         key_block=s->s3->tmp.key_block;
 312
 313 #ifdef KSSL_DEBUG
 314         printf("tls1_change_cipher_state(which= %d) w/\n", which);
 315         printf("\talg= %ld/%ld, comp= %p\n",
 316                s->s3->tmp.new_cipher->algorithm_mkey,
 317                s->s3->tmp.new_cipher->algorithm_auth,
 318                comp);
 319         printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
 320         printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
 321                 c->nid,c->block_size,c->key_len,c->iv_len);
 322         printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
 323         {
 324         int i;
 325         for (i=0; i<s->s3->tmp.key_block_length; i++)
 326                 printf("%02x", key_block[i]);  printf("\n");
 327         }
 328 #endif  /* KSSL_DEBUG */
 329
 330         if (which & SSL3_CC_READ)
 331                 {
 332                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 333                         s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
 334                         else
 335                         s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 336
 337                 if (s->enc_read_ctx != NULL)
 338                         reuse_dd = 1;
 339                 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 340                         goto err;
 341                 else
 342                         /* make sure it's intialized in case we exit later with an error */
 343                         EVP_CIPHER_CTX_init(s->enc_read_ctx);
 344                 dd= s->enc_read_ctx;
 345                 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
 346 #ifndef OPENSSL_NO_COMP
 347                 if (s->expand != NULL)
 348                         {
 349                         COMP_CTX_free(s->expand);
 350                         s->expand=NULL;
 351                         }
 352                 if (comp != NULL)
 353                         {
 354                         s->expand=COMP_CTX_new(comp->method);
 355                         if (s->expand == NULL)
 356                                 {
 357                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 358                                 goto err2;
 359                                 }
 360                         if (s->s3->rrec.comp == NULL)
 361                                 s->s3->rrec.comp=(unsigned char *)
 362                                         OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
 363                         if (s->s3->rrec.comp == NULL)
 364                                 goto err;
 365                         }
 366 #endif
 367                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 368                 if (s->version != DTLS1_VERSION)
 369                         memset(&(s->s3->read_sequence[0]),0,8);
 370                 mac_secret= &(s->s3->read_mac_secret[0]);
 371                 mac_secret_size=&(s->s3->read_mac_secret_size);
 372                 }
 373         else
 374                 {
 375                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 376                         s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
 377                         else
 378                         s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
 379                 if (s->enc_write_ctx != NULL)
 380                         reuse_dd = 1;
 381                 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 382                         goto err;
 383                 else
 384                         /* make sure it's intialized in case we exit later with an error */
 385                         EVP_CIPHER_CTX_init(s->enc_write_ctx);
 386                 dd= s->enc_write_ctx;
 387                 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
 388 #ifndef OPENSSL_NO_COMP
 389                 if (s->compress != NULL)
 390                         {
 391                         COMP_CTX_free(s->compress);
 392                         s->compress=NULL;
 393                         }
 394                 if (comp != NULL)
 395                         {
 396                         s->compress=COMP_CTX_new(comp->method);
 397                         if (s->compress == NULL)
 398                                 {
 399                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 400                                 goto err2;
 401                                 }
 402                         }
 403 #endif
 404                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 405                 if (s->version != DTLS1_VERSION)
 406                         memset(&(s->s3->write_sequence[0]),0,8);
 407                 mac_secret= &(s->s3->write_mac_secret[0]);
 408                 mac_secret_size = &(s->s3->write_mac_secret_size);
 409                 }
 410
 411         if (reuse_dd)
 412                 EVP_CIPHER_CTX_cleanup(dd);
 413
 414         p=s->s3->tmp.key_block;
 415         i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
 416
 417         cl=EVP_CIPHER_key_length(c);
 418         j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
 419                        cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
 420         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
 421         k=EVP_CIPHER_iv_length(c);
 422         er1= &(s->s3->client_random[0]);
 423         er2= &(s->s3->server_random[0]);
 424         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 425                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
 426                 {
 427                 ms=  &(p[ 0]); n=i+i;
 428                 key= &(p[ n]); n+=j+j;
 429                 iv=  &(p[ n]); n+=k+k;
 430                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
 431                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
 432                 client_write=1;
 433                 }
 434         else
 435                 {
 436                 n=i;
 437                 ms=  &(p[ n]); n+=i+j;
 438                 key= &(p[ n]); n+=j+k;
 439                 iv=  &(p[ n]); n+=k;
 440                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
 441                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
 442                 client_write=0;
 443                 }
 444
 445         if (n > s->s3->tmp.key_block_length)
 446                 {
 447                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
 448                 goto err2;
 449                 }
 450
 451         memcpy(mac_secret,ms,i);
 452         mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
 453                         mac_secret,*mac_secret_size);
 454         EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
 455         EVP_PKEY_free(mac_key);
 456 #ifdef TLS_DEBUG
 457 printf("which = %04X\nmac key=",which);
 458 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
 459 #endif
 460         if (is_export)
 461                 {
 462                 /* In here I set both the read and write key/iv to the
 463                  * same value since only the correct one will be used :-).
 464                  */
 465                 tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 466                          exp_label,exp_label_len,
 467                          s->s3->client_random,SSL3_RANDOM_SIZE,
 468                          s->s3->server_random,SSL3_RANDOM_SIZE,
 469                          NULL,0,NULL,0,
 470                          key,j,tmp1,tmp2,EVP_CIPHER_key_length(c));
 471                 key=tmp1;
 472
 473                 if (k > 0)
 474                         {
 475                         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 476                                  TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
 477                                  s->s3->client_random,SSL3_RANDOM_SIZE,
 478                                  s->s3->server_random,SSL3_RANDOM_SIZE,
 479                                  NULL,0,NULL,0,
 480                                  empty,0,iv1,iv2,k*2);
 481                         if (client_write)
 482                                 iv=iv1;
 483                         else
 484                                 iv= &(iv1[k]);
 485                         }
 486                 }
 487
 488         s->session->key_arg_length=0;
 489 #ifdef KSSL_DEBUG
 490         {
 491         int i;
 492         printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
 493         printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
 494         printf("\n");
 495         printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
 496         printf("\n");
 497         }
 498 #endif  /* KSSL_DEBUG */
 499
 500         EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
 501 #ifdef TLS_DEBUG
 502 printf("which = %04X\nkey=",which);
 503 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
 504 printf("\niv=");
 505 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
 506 printf("\n");
 507 #endif
 508
 509         OPENSSL_cleanse(tmp1,sizeof(tmp1));
 510         OPENSSL_cleanse(tmp2,sizeof(tmp1));
 511         OPENSSL_cleanse(iv1,sizeof(iv1));
 512         OPENSSL_cleanse(iv2,sizeof(iv2));
 513         return(1);
 514 err:
 515         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
 516 err2:
 517         return(0);
 518         }
 519
 520 int tls1_setup_key_block(SSL *s)
 521         {
 522         unsigned char *p1,*p2;
 523         const EVP_CIPHER *c;
 524         const EVP_MD *hash;
 525         int num;
 526         SSL_COMP *comp;
 527         int mac_type= NID_undef,mac_secret_size=0;
 528
 529 #ifdef KSSL_DEBUG
 530         printf ("tls1_setup_key_block()\n");
 531 #endif  /* KSSL_DEBUG */
 532
 533         if (s->s3->tmp.key_block_length != 0)
 534                 return(1);
 535
 536         if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
 537                 {
 538                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 539                 return(0);
 540                 }
 541
 542         s->s3->tmp.new_sym_enc=c;
 543         s->s3->tmp.new_hash=hash;
 544         s->s3->tmp.new_mac_pkey_type = mac_type;
 545         s->s3->tmp.new_mac_secret_size = mac_secret_size;
 546         num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
 547         num*=2;
 548
 549         ssl3_cleanup_key_block(s);
 550
 551         if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 552                 goto err;
 553         if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 554                 goto err;
 555
 556         s->s3->tmp.key_block_length=num;
 557         s->s3->tmp.key_block=p1;
 558
 559
 560 #ifdef TLS_DEBUG
 561 printf("client random\n");
 562 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
 563 printf("server random\n");
 564 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
 565 printf("pre-master\n");
 566 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
 567 #endif
 568         tls1_generate_key_block(s,p1,p2,num);
 569         OPENSSL_cleanse(p2,num);
 570         OPENSSL_free(p2);
 571 #ifdef TLS_DEBUG
 572 printf("\nkey block\n");
 573 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
 574 #endif
 575
 576         if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
 577                 {
 578                 /* enable vulnerability countermeasure for CBC ciphers with
 579                  * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 580                  */
 581                 s->s3->need_empty_fragments = 1;
 582
 583                 if (s->session->cipher != NULL)
 584                         {
 585                         if (s->session->cipher->algorithm_enc == SSL_eNULL)
 586                                 s->s3->need_empty_fragments = 0;
 587
 588 #ifndef OPENSSL_NO_RC4
 589                         if (s->session->cipher->algorithm_enc == SSL_RC4)
 590                                 s->s3->need_empty_fragments = 0;
 591 #endif
 592                         }
 593                 }
 594
 595         return(1);
 596 err:
 597         SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 598         return(0);
 599         }
 600
 601 int tls1_enc(SSL *s, int send)
 602         {
 603         SSL3_RECORD *rec;
 604         EVP_CIPHER_CTX *ds;
 605         unsigned long l;
 606         int bs,i,ii,j,k,n=0;
 607         const EVP_CIPHER *enc;
 608
 609         if (send)
 610                 {
 611                 if (EVP_MD_CTX_md(s->write_hash))
 612                         {
 613                         n=EVP_MD_CTX_size(s->write_hash);
 614                         OPENSSL_assert(n >= 0);
 615                         }
 616                 ds=s->enc_write_ctx;
 617                 rec= &(s->s3->wrec);
 618                 if (s->enc_write_ctx == NULL)
 619                         enc=NULL;
 620                 else
 621                         {
 622                         int ivlen;
 623                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
 624                         /* For TLSv1.1 and later explicit IV */
 625                         if (s->version >= TLS1_1_VERSION)
 626                                 ivlen = EVP_CIPHER_iv_length(enc);
 627                         else
 628                                 ivlen = 0;
 629                         if (ivlen > 1)
 630                                 {
 631                                 if ( rec->data != rec->input)
 632                                 /* we can't write into the input stream:
 633                                  * Can this ever happen?? (steve)
 634                                  */
 635                                 fprintf(stderr,
 636                                         "%s:%d: rec->data != rec->input\n",
 637                                         __FILE__, __LINE__);
 638                                 else if (RAND_bytes(rec->input, ivlen) <= 0)
 639                                         return -1;
 640                                 }
 641                         }
 642                 }
 643         else
 644                 {
 645                 if (EVP_MD_CTX_md(s->read_hash))
 646                         {
 647                         n=EVP_MD_CTX_size(s->read_hash);
 648                         OPENSSL_assert(n >= 0);
 649                         }
 650                 ds=s->enc_read_ctx;
 651                 rec= &(s->s3->rrec);
 652                 if (s->enc_read_ctx == NULL)
 653                         enc=NULL;
 654                 else
 655                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
 656                 }
 657
 658 #ifdef KSSL_DEBUG
 659         printf("tls1_enc(%d)\n", send);
 660 #endif    /* KSSL_DEBUG */
 661
 662         if ((s->session == NULL) || (ds == NULL) ||
 663                 (enc == NULL))
 664                 {
 665                 memmove(rec->data,rec->input,rec->length);
 666                 rec->input=rec->data;
 667                 }
 668         else
 669                 {
 670                 l=rec->length;
 671                 bs=EVP_CIPHER_block_size(ds->cipher);
 672
 673                 if ((bs != 1) && send)
 674                         {
 675                         i=bs-((int)l%bs);
 676
 677                         /* Add weird padding of upto 256 bytes */
 678
 679                         /* we need to add 'i' padding bytes of value j */
 680                         j=i-1;
 681                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
 682                                 {
 683                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 684                                         j++;
 685                                 }
 686                         for (k=(int)l; k<(int)(l+i); k++)
 687                                 rec->input[k]=j;
 688                         l+=i;
 689                         rec->length+=i;
 690                         }
 691
 692 #ifdef KSSL_DEBUG
 693                 {
 694                 unsigned long ui;
 695                 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
 696                         ds,rec->data,rec->input,l);
 697                 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
 698                         ds->buf_len, ds->cipher->key_len,
 699                         DES_KEY_SZ, DES_SCHEDULE_SZ,
 700                         ds->cipher->iv_len);
 701                 printf("\t\tIV: ");
 702                 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
 703                 printf("\n");
 704                 printf("\trec->input=");
 705                 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
 706                 printf("\n");
 707                 }
 708 #endif  /* KSSL_DEBUG */
 709
 710                 if (!send)
 711                         {
 712                         if (l == 0 || l%bs != 0)
 713                                 {
 714                                 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
 715                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
 716                                 return 0;
 717                                 }
 718                         }
 719
 720                 EVP_Cipher(ds,rec->data,rec->input,l);
 721
 722 #ifdef KSSL_DEBUG
 723                 {
 724                 unsigned long i;
 725                 printf("\trec->data=");
 726                 for (i=0; i<l; i++)
 727                         printf(" %02x", rec->data[i]);  printf("\n");
 728                 }
 729 #endif  /* KSSL_DEBUG */
 730
 731                 if ((bs != 1) && !send)
 732                         {
 733                         ii=i=rec->data[l-1]; /* padding_length */
 734                         i++;
 735                         /* NB: if compression is in operation the first packet
 736                          * may not be of even length so the padding bug check
 737                          * cannot be performed. This bug workaround has been
 738                          * around since SSLeay so hopefully it is either fixed
 739                          * now or no buggy implementation supports compression
 740                          * [steve]
 741                          */
 742                         if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
 743                                 && !s->expand)
 744                                 {
 745                                 /* First packet is even in size, so check */
 746                                 if ((memcmp(s->s3->read_sequence,
 747                                         "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
 748                                         s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
 749                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 750                                         i--;
 751                                 }
 752                         /* TLS 1.0 does not bound the number of padding bytes by the block size.
 753                          * All of them must have value 'padding_length'. */
 754                         if (i > (int)rec->length)
 755                                 {
 756                                 /* Incorrect padding. SSLerr() and ssl3_alert are done
 757                                  * by caller: we don't want to reveal whether this is
 758                                  * a decryption error or a MAC verification failure
 759                                  * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
 760                                 return -1;
 761                                 }
 762                         for (j=(int)(l-i); j<(int)l; j++)
 763                                 {
 764                                 if (rec->data[j] != ii)
 765                                         {
 766                                         /* Incorrect padding */
 767                                         return -1;
 768                                         }
 769                                 }
 770                         rec->length -=i;
 771                         if (s->version >= TLS1_1_VERSION)
 772                                 {
 773                                 rec->data += bs;    /* skip the explicit IV */
 774                                 rec->input += bs;
 775                                 rec->length -= bs;
 776                                 }
 777                         }
 778                 }
 779         return(1);
 780         }
 781 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
 782         {
 783         unsigned int ret;
 784         EVP_MD_CTX ctx, *d=NULL;
 785         int i;
 786
 787         if (s->s3->handshake_buffer)
 788                 if (!ssl3_digest_cached_records(s))
 789                         return 0;
 790
 791         for (i=0;i<SSL_MAX_DIGEST;i++)
 792                 {
 793                   if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
 794                         {
 795                         d=s->s3->handshake_dgst[i];
 796                         break;
 797                         }
 798                 }
 799         if (!d) {
 800                 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
 801                 return 0;
 802         }
 803
 804         EVP_MD_CTX_init(&ctx);
 805         EVP_MD_CTX_copy_ex(&ctx,d);
 806         EVP_DigestFinal_ex(&ctx,out,&ret);
 807         EVP_MD_CTX_cleanup(&ctx);
 808         return((int)ret);
 809         }
 810
 811 int tls1_final_finish_mac(SSL *s,
 812              const char *str, int slen, unsigned char *out)
 813         {
 814         unsigned int i;
 815         EVP_MD_CTX ctx;
 816         unsigned char buf[2*EVP_MAX_MD_SIZE];
 817         unsigned char *q,buf2[12];
 818         int idx;
 819         long mask;
 820         int err=0;
 821         const EVP_MD *md;
 822
 823         q=buf;
 824
 825         if (s->s3->handshake_buffer)
 826                 if (!ssl3_digest_cached_records(s))
 827                         return 0;
 828
 829         EVP_MD_CTX_init(&ctx);
 830
 831         for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
 832                 {
 833                 if (mask & s->s3->tmp.new_cipher->algorithm2)
 834                         {
 835                         int hashsize = EVP_MD_size(md);
 836                         if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
 837                                 {
 838                                 /* internal error: 'buf' is too small for this cipersuite! */
 839                                 err = 1;
 840                                 }
 841                         else
 842                                 {
 843                                 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
 844                                 EVP_DigestFinal_ex(&ctx,q,&i);
 845                                 if (i != (unsigned int)hashsize) /* can't really happen */
 846                                         err = 1;
 847                                 q+=i;
 848                                 }
 849                         }
 850                 }
 851
 852         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 853                  str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
 854                  s->session->master_key,s->session->master_key_length,
 855                  out,buf2,sizeof buf2);
 856         EVP_MD_CTX_cleanup(&ctx);
 857
 858         if (err)
 859                 return 0;
 860         else
 861                 return sizeof buf2;
 862         }
 863
 864 int tls1_mac(SSL *ssl, unsigned char *md, int send)
 865         {
 866         SSL3_RECORD *rec;
 867         unsigned char *mac_sec,*seq;
 868         EVP_MD_CTX *hash;
 869         size_t md_size;
 870         int i;
 871         EVP_MD_CTX hmac, *mac_ctx;
 872         unsigned char buf[5];
 873         int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
 874         int t;
 875
 876         if (send)
 877                 {
 878                 rec= &(ssl->s3->wrec);
 879                 mac_sec= &(ssl->s3->write_mac_secret[0]);
 880                 seq= &(ssl->s3->write_sequence[0]);
 881                 hash=ssl->write_hash;
 882                 }
 883         else
 884                 {
 885                 rec= &(ssl->s3->rrec);
 886                 mac_sec= &(ssl->s3->read_mac_secret[0]);
 887                 seq= &(ssl->s3->read_sequence[0]);
 888                 hash=ssl->read_hash;
 889                 }
 890
 891         t=EVP_MD_CTX_size(hash);
 892         OPENSSL_assert(t >= 0);
 893         md_size=t;
 894
 895         buf[0]=rec->type;
 896         buf[1]=(unsigned char)(ssl->version>>8);
 897         buf[2]=(unsigned char)(ssl->version);
 898         buf[3]=rec->length>>8;
 899         buf[4]=rec->length&0xff;
 900
 901         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
 902         if (stream_mac)
 903                 {
 904                         mac_ctx = hash;
 905                 }
 906                 else
 907                 {
 908                         EVP_MD_CTX_copy(&hmac,hash);
 909                         mac_ctx = &hmac;
 910                 }
 911
 912         if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
 913                 {
 914                 unsigned char dtlsseq[8],*p=dtlsseq;
 915
 916                 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
 917                 memcpy (p,&seq[2],6);
 918
 919                 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
 920                 }
 921         else
 922                 EVP_DigestSignUpdate(mac_ctx,seq,8);
 923
 924         EVP_DigestSignUpdate(mac_ctx,buf,5);
 925         EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
 926         t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
 927         OPENSSL_assert(t > 0);
 928
 929         if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
 930 #ifdef TLS_DEBUG
 931 printf("sec=");
 932 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
 933 printf("seq=");
 934 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
 935 printf("buf=");
 936 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
 937 printf("rec=");
 938 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
 939 #endif
 940
 941         if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
 942                 {
 943                 for (i=7; i>=0; i--)
 944                         {
 945                         ++seq[i];
 946                         if (seq[i] != 0) break;
 947                         }
 948                 }
 949
 950 #ifdef TLS_DEBUG
 951 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
 952 #endif
 953         return(md_size);
 954         }
 955
 956 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 957              int len)
 958         {
 959         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
 960         const void *co = NULL, *so = NULL;
 961         int col = 0, sol = 0;
 962
 963 #ifdef KSSL_DEBUG
 964         printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
 965 #endif  /* KSSL_DEBUG */
 966
 967 #ifdef TLSEXT_TYPE_opaque_prf_input
 968         if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
 969             s->s3->client_opaque_prf_input_len > 0 &&
 970             s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
 971                 {
 972                 co = s->s3->client_opaque_prf_input;
 973                 col = s->s3->server_opaque_prf_input_len;
 974                 so = s->s3->server_opaque_prf_input;
 975                 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) */
 976                 }
 977 #endif
 978
 979         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 980                 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
 981                 s->s3->client_random,SSL3_RANDOM_SIZE,
 982                 co, col,
 983                 s->s3->server_random,SSL3_RANDOM_SIZE,
 984                 so, sol,
 985                 p,len,
 986                 s->session->master_key,buff,sizeof buff);
 987
 988 #ifdef KSSL_DEBUG
 989         printf ("tls1_generate_master_secret() complete\n");
 990 #endif  /* KSSL_DEBUG */
 991         return(SSL3_MASTER_SECRET_SIZE);
 992         }
 993
 994 int tls1_alert_code(int code)
 995         {
 996         switch (code)
 997                 {
 998         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
 999         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1000         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
1001         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
1002         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
1003         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1004         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
1005         case SSL_AD_NO_CERTIFICATE:     return(-1);
1006         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
1007         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1008         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1009         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1010         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1011         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
1012         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
1013         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
1014         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
1015         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
1016         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1017         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
1018         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1019         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
1020         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
1021         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
1022         case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1023         case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1024         case SSL_AD_UNRECOGNIZED_NAME:  return(TLS1_AD_UNRECOGNIZED_NAME);
1025         case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1026         case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1027         case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1028 #if 0 /* not appropriate for TLS, not used for DTLS */
1029         case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1030                                           (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1031 #endif
1032         default:                        return(-1);
1033                 }
1034         }
1035