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 #include <openssl/comp.h>
 141 #include <openssl/evp.h>
 142 #include <openssl/hmac.h>
 143 #include <openssl/md5.h>
 144 #ifdef KSSL_DEBUG
 145 #include <openssl/des.h>
 146 #endif
 147
 148 /* seed1 through seed5 are virtually concatenated */
 149 static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
 150                         int sec_len,
 151                         const void *seed1, int seed1_len,
 152                         const void *seed2, int seed2_len,
 153                         const void *seed3, int seed3_len,
 154                         const void *seed4, int seed4_len,
 155                         const void *seed5, int seed5_len,
 156                         unsigned char *out, int olen)
 157         {
 158         int chunk,n;
 159         unsigned int j;
 160         HMAC_CTX ctx;
 161         HMAC_CTX ctx_tmp;
 162         unsigned char A1[EVP_MAX_MD_SIZE];
 163         unsigned int A1_len;
 164
 165         chunk=EVP_MD_size(md);
 166         OPENSSL_assert(chunk >= 0);
 167
 168         HMAC_CTX_init(&ctx);
 169         HMAC_CTX_init(&ctx_tmp);
 170         HMAC_Init_ex(&ctx,sec,sec_len,md, NULL);
 171         HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL);
 172         if (seed1 != NULL) HMAC_Update(&ctx,seed1,seed1_len);
 173         if (seed2 != NULL) HMAC_Update(&ctx,seed2,seed2_len);
 174         if (seed3 != NULL) HMAC_Update(&ctx,seed3,seed3_len);
 175         if (seed4 != NULL) HMAC_Update(&ctx,seed4,seed4_len);
 176         if (seed5 != NULL) HMAC_Update(&ctx,seed5,seed5_len);
 177         HMAC_Final(&ctx,A1,&A1_len);
 178
 179         n=0;
 180         for (;;)
 181                 {
 182                 HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */
 183                 HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */
 184                 HMAC_Update(&ctx,A1,A1_len);
 185                 HMAC_Update(&ctx_tmp,A1,A1_len);
 186                 if (seed1 != NULL) HMAC_Update(&ctx,seed1,seed1_len);
 187                 if (seed2 != NULL) HMAC_Update(&ctx,seed2,seed2_len);
 188                 if (seed3 != NULL) HMAC_Update(&ctx,seed3,seed3_len);
 189                 if (seed4 != NULL) HMAC_Update(&ctx,seed4,seed4_len);
 190                 if (seed5 != NULL) HMAC_Update(&ctx,seed5,seed5_len);
 191
 192                 if (olen > chunk)
 193                         {
 194                         HMAC_Final(&ctx,out,&j);
 195                         out+=j;
 196                         olen-=j;
 197                         HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
 198                         }
 199                 else    /* last one */
 200                         {
 201                         HMAC_Final(&ctx,A1,&A1_len);
 202                         memcpy(out,A1,olen);
 203                         break;
 204                         }
 205                 }
 206         HMAC_CTX_cleanup(&ctx);
 207         HMAC_CTX_cleanup(&ctx_tmp);
 208         OPENSSL_cleanse(A1,sizeof(A1));
 209         }
 210
 211 /* seed1 through seed5 are virtually concatenated */
 212 static void tls1_PRF(long digest_mask,
 213                      const void *seed1, int seed1_len,
 214                      const void *seed2, int seed2_len,
 215                      const void *seed3, int seed3_len,
 216                      const void *seed4, int seed4_len,
 217                      const void *seed5, int seed5_len,
 218                      const unsigned char *sec, int slen,
 219                      unsigned char *out1,
 220                      unsigned char *out2, int olen)
 221         {
 222         int len,i,idx,count;
 223         const unsigned char *S1;
 224         long m;
 225         const EVP_MD *md;
 226
 227         /* Count number of digests and partition sec evenly */
 228         count=0;
 229         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 230                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
 231         }
 232         len=slen/count;
 233         S1=sec;
 234         memset(out1,0,olen);
 235         for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
 236                 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
 237                         if (!md) {
 238                                 SSLerr(SSL_F_TLS1_PRF,
 239                                 SSL_R_UNSUPPORTED_DIGEST_TYPE);
 240                                 return;
 241                         }
 242                         tls1_P_hash(md ,S1,len+(slen&1),
 243                                     seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
 244                                     out2,olen);
 245                         S1+=len;
 246                         for (i=0; i<olen; i++)
 247                         {
 248                                 out1[i]^=out2[i];
 249                         }
 250                 }
 251         }
 252
 253 }
 254 static void tls1_generate_key_block(SSL *s, unsigned char *km,
 255              unsigned char *tmp, int num)
 256         {
 257         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 258                  TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
 259                  s->s3->server_random,SSL3_RANDOM_SIZE,
 260                  s->s3->client_random,SSL3_RANDOM_SIZE,
 261                  NULL,0,NULL,0,
 262                  s->session->master_key,s->session->master_key_length,
 263                  km,tmp,num);
 264 #ifdef KSSL_DEBUG
 265         printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
 266                 s->session->master_key_length);
 267         {
 268         int i;
 269         for (i=0; i < s->session->master_key_length; i++)
 270                 {
 271                 printf("%02X", s->session->master_key[i]);
 272                 }
 273         printf("\n");  }
 274 #endif    /* KSSL_DEBUG */
 275         }
 276
 277 int tls1_change_cipher_state(SSL *s, int which)
 278         {
 279         static const unsigned char empty[]="";
 280         unsigned char *p,*key_block,*mac_secret;
 281         unsigned char *exp_label;
 282         unsigned char tmp1[EVP_MAX_KEY_LENGTH];
 283         unsigned char tmp2[EVP_MAX_KEY_LENGTH];
 284         unsigned char iv1[EVP_MAX_IV_LENGTH*2];
 285         unsigned char iv2[EVP_MAX_IV_LENGTH*2];
 286         unsigned char *ms,*key,*iv,*er1,*er2;
 287         int client_write;
 288         EVP_CIPHER_CTX *dd;
 289         const EVP_CIPHER *c;
 290 #ifndef OPENSSL_NO_COMP
 291         const SSL_COMP *comp;
 292 #endif
 293         const EVP_MD *m;
 294         int mac_type;
 295         int *mac_secret_size;
 296         EVP_MD_CTX *mac_ctx;
 297         EVP_PKEY *mac_key;
 298         int is_export,n,i,j,k,exp_label_len,cl;
 299         int reuse_dd = 0;
 300
 301         is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
 302         c=s->s3->tmp.new_sym_enc;
 303         m=s->s3->tmp.new_hash;
 304         mac_type = s->s3->tmp.new_mac_pkey_type;
 305 #ifndef OPENSSL_NO_COMP
 306         comp=s->s3->tmp.new_compression;
 307 #endif
 308         key_block=s->s3->tmp.key_block;
 309
 310 #ifdef KSSL_DEBUG
 311         printf("tls1_change_cipher_state(which= %d) w/\n", which);
 312         printf("\talg= %ld/%ld, comp= %p\n",
 313                s->s3->tmp.new_cipher->algorithm_mkey,
 314                s->s3->tmp.new_cipher->algorithm_auth,
 315                comp);
 316         printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
 317         printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
 318                 c->nid,c->block_size,c->key_len,c->iv_len);
 319         printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
 320         {
 321         int i;
 322         for (i=0; i<s->s3->tmp.key_block_length; i++)
 323                 printf("%02x", key_block[i]);  printf("\n");
 324         }
 325 #endif  /* KSSL_DEBUG */
 326
 327         if (which & SSL3_CC_READ)
 328                 {
 329                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 330                         s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
 331                         else
 332                         s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 333
 334                 if (s->enc_read_ctx != NULL)
 335                         reuse_dd = 1;
 336                 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 337                         goto err;
 338                 else
 339                         /* make sure it's intialized in case we exit later with an error */
 340                         EVP_CIPHER_CTX_init(s->enc_read_ctx);
 341                 dd= s->enc_read_ctx;
 342                 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
 343 #ifndef OPENSSL_NO_COMP
 344                 if (s->expand != NULL)
 345                         {
 346                         COMP_CTX_free(s->expand);
 347                         s->expand=NULL;
 348                         }
 349                 if (comp != NULL)
 350                         {
 351                         s->expand=COMP_CTX_new(comp->method);
 352                         if (s->expand == NULL)
 353                                 {
 354                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 355                                 goto err2;
 356                                 }
 357                         if (s->s3->rrec.comp == NULL)
 358                                 s->s3->rrec.comp=(unsigned char *)
 359                                         OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
 360                         if (s->s3->rrec.comp == NULL)
 361                                 goto err;
 362                         }
 363 #endif
 364                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 365                 if (s->version != DTLS1_VERSION)
 366                         memset(&(s->s3->read_sequence[0]),0,8);
 367                 mac_secret= &(s->s3->read_mac_secret[0]);
 368                 mac_secret_size=&(s->s3->read_mac_secret_size);
 369                 }
 370         else
 371                 {
 372                 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 373                         s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
 374                         else
 375                         s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
 376                 if (s->enc_write_ctx != NULL)
 377                         reuse_dd = 1;
 378                 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
 379                         goto err;
 380                 else
 381                         /* make sure it's intialized in case we exit later with an error */
 382                         EVP_CIPHER_CTX_init(s->enc_write_ctx);
 383                 dd= s->enc_write_ctx;
 384                 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
 385 #ifndef OPENSSL_NO_COMP
 386                 if (s->compress != NULL)
 387                         {
 388                         COMP_CTX_free(s->compress);
 389                         s->compress=NULL;
 390                         }
 391                 if (comp != NULL)
 392                         {
 393                         s->compress=COMP_CTX_new(comp->method);
 394                         if (s->compress == NULL)
 395                                 {
 396                                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
 397                                 goto err2;
 398                                 }
 399                         }
 400 #endif
 401                 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 402                 if (s->version != DTLS1_VERSION)
 403                         memset(&(s->s3->write_sequence[0]),0,8);
 404                 mac_secret= &(s->s3->write_mac_secret[0]);
 405                 mac_secret_size = &(s->s3->write_mac_secret_size);
 406                 }
 407
 408         if (reuse_dd)
 409                 EVP_CIPHER_CTX_cleanup(dd);
 410
 411         p=s->s3->tmp.key_block;
 412         i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
 413
 414         cl=EVP_CIPHER_key_length(c);
 415         j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
 416                        cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
 417         /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
 418         k=EVP_CIPHER_iv_length(c);
 419         er1= &(s->s3->client_random[0]);
 420         er2= &(s->s3->server_random[0]);
 421         if (    (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 422                 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
 423                 {
 424                 ms=  &(p[ 0]); n=i+i;
 425                 key= &(p[ n]); n+=j+j;
 426                 iv=  &(p[ n]); n+=k+k;
 427                 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
 428                 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
 429                 client_write=1;
 430                 }
 431         else
 432                 {
 433                 n=i;
 434                 ms=  &(p[ n]); n+=i+j;
 435                 key= &(p[ n]); n+=j+k;
 436                 iv=  &(p[ n]); n+=k;
 437                 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
 438                 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
 439                 client_write=0;
 440                 }
 441
 442         if (n > s->s3->tmp.key_block_length)
 443                 {
 444                 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
 445                 goto err2;
 446                 }
 447
 448         memcpy(mac_secret,ms,i);
 449         mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
 450                         mac_secret,*mac_secret_size);
 451         EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
 452         EVP_PKEY_free(mac_key);
 453 #ifdef TLS_DEBUG
 454 printf("which = %04X\nmac key=",which);
 455 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
 456 #endif
 457         if (is_export)
 458                 {
 459                 /* In here I set both the read and write key/iv to the
 460                  * same value since only the correct one will be used :-).
 461                  */
 462                 tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 463                          exp_label,exp_label_len,
 464                          s->s3->client_random,SSL3_RANDOM_SIZE,
 465                          s->s3->server_random,SSL3_RANDOM_SIZE,
 466                          NULL,0,NULL,0,
 467                          key,j,tmp1,tmp2,EVP_CIPHER_key_length(c));
 468                 key=tmp1;
 469
 470                 if (k > 0)
 471                         {
 472                         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 473                                  TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
 474                                  s->s3->client_random,SSL3_RANDOM_SIZE,
 475                                  s->s3->server_random,SSL3_RANDOM_SIZE,
 476                                  NULL,0,NULL,0,
 477                                  empty,0,iv1,iv2,k*2);
 478                         if (client_write)
 479                                 iv=iv1;
 480                         else
 481                                 iv= &(iv1[k]);
 482                         }
 483                 }
 484
 485         s->session->key_arg_length=0;
 486 #ifdef KSSL_DEBUG
 487         {
 488         int i;
 489         printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
 490         printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
 491         printf("\n");
 492         printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
 493         printf("\n");
 494         }
 495 #endif  /* KSSL_DEBUG */
 496
 497         EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
 498 #ifdef TLS_DEBUG
 499 printf("which = %04X\nkey=",which);
 500 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
 501 printf("\niv=");
 502 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
 503 printf("\n");
 504 #endif
 505
 506         OPENSSL_cleanse(tmp1,sizeof(tmp1));
 507         OPENSSL_cleanse(tmp2,sizeof(tmp1));
 508         OPENSSL_cleanse(iv1,sizeof(iv1));
 509         OPENSSL_cleanse(iv2,sizeof(iv2));
 510         return(1);
 511 err:
 512         SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
 513 err2:
 514         return(0);
 515         }
 516
 517 int tls1_setup_key_block(SSL *s)
 518         {
 519         unsigned char *p1,*p2;
 520         const EVP_CIPHER *c;
 521         const EVP_MD *hash;
 522         int num;
 523         SSL_COMP *comp;
 524         int mac_type= NID_undef,mac_secret_size=0;
 525
 526 #ifdef KSSL_DEBUG
 527         printf ("tls1_setup_key_block()\n");
 528 #endif  /* KSSL_DEBUG */
 529
 530         if (s->s3->tmp.key_block_length != 0)
 531                 return(1);
 532
 533         if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
 534                 {
 535                 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 536                 return(0);
 537                 }
 538
 539         s->s3->tmp.new_sym_enc=c;
 540         s->s3->tmp.new_hash=hash;
 541         s->s3->tmp.new_mac_pkey_type = mac_type;
 542         s->s3->tmp.new_mac_secret_size = mac_secret_size;
 543         num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
 544         num*=2;
 545
 546         ssl3_cleanup_key_block(s);
 547
 548         if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 549                 goto err;
 550         if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
 551                 goto err;
 552
 553         s->s3->tmp.key_block_length=num;
 554         s->s3->tmp.key_block=p1;
 555
 556
 557 #ifdef TLS_DEBUG
 558 printf("client random\n");
 559 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
 560 printf("server random\n");
 561 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
 562 printf("pre-master\n");
 563 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
 564 #endif
 565         tls1_generate_key_block(s,p1,p2,num);
 566         OPENSSL_cleanse(p2,num);
 567         OPENSSL_free(p2);
 568 #ifdef TLS_DEBUG
 569 printf("\nkey block\n");
 570 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
 571 #endif
 572
 573         if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
 574                 {
 575                 /* enable vulnerability countermeasure for CBC ciphers with
 576                  * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 577                  */
 578                 s->s3->need_empty_fragments = 1;
 579
 580                 if (s->session->cipher != NULL)
 581                         {
 582                         if (s->session->cipher->algorithm_enc == SSL_eNULL)
 583                                 s->s3->need_empty_fragments = 0;
 584
 585 #ifndef OPENSSL_NO_RC4
 586                         if (s->session->cipher->algorithm_enc == SSL_RC4)
 587                                 s->s3->need_empty_fragments = 0;
 588 #endif
 589                         }
 590                 }
 591
 592         return(1);
 593 err:
 594         SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
 595         return(0);
 596         }
 597
 598 int tls1_enc(SSL *s, int send)
 599         {
 600         SSL3_RECORD *rec;
 601         EVP_CIPHER_CTX *ds;
 602         unsigned long l;
 603         int bs,i,ii,j,k,n=0;
 604         const EVP_CIPHER *enc;
 605
 606         if (send)
 607                 {
 608                 if (EVP_MD_CTX_md(s->write_hash))
 609                         {
 610                         n=EVP_MD_CTX_size(s->write_hash);
 611                         OPENSSL_assert(n >= 0);
 612                         }
 613                 ds=s->enc_write_ctx;
 614                 rec= &(s->s3->wrec);
 615                 if (s->enc_write_ctx == NULL)
 616                         enc=NULL;
 617                 else
 618                         enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
 619                 }
 620         else
 621                 {
 622                 if (EVP_MD_CTX_md(s->read_hash))
 623                         {
 624                         n=EVP_MD_CTX_size(s->read_hash);
 625                         OPENSSL_assert(n >= 0);
 626                         }
 627                 ds=s->enc_read_ctx;
 628                 rec= &(s->s3->rrec);
 629                 if (s->enc_read_ctx == NULL)
 630                         enc=NULL;
 631                 else
 632                         enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
 633                 }
 634
 635 #ifdef KSSL_DEBUG
 636         printf("tls1_enc(%d)\n", send);
 637 #endif    /* KSSL_DEBUG */
 638
 639         if ((s->session == NULL) || (ds == NULL) ||
 640                 (enc == NULL))
 641                 {
 642                 memmove(rec->data,rec->input,rec->length);
 643                 rec->input=rec->data;
 644                 }
 645         else
 646                 {
 647                 l=rec->length;
 648                 bs=EVP_CIPHER_block_size(ds->cipher);
 649
 650                 if ((bs != 1) && send)
 651                         {
 652                         i=bs-((int)l%bs);
 653
 654                         /* Add weird padding of upto 256 bytes */
 655
 656                         /* we need to add 'i' padding bytes of value j */
 657                         j=i-1;
 658                         if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
 659                                 {
 660                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 661                                         j++;
 662                                 }
 663                         for (k=(int)l; k<(int)(l+i); k++)
 664                                 rec->input[k]=j;
 665                         l+=i;
 666                         rec->length+=i;
 667                         }
 668
 669 #ifdef KSSL_DEBUG
 670                 {
 671                 unsigned long ui;
 672                 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
 673                         ds,rec->data,rec->input,l);
 674                 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
 675                         ds->buf_len, ds->cipher->key_len,
 676                         DES_KEY_SZ, DES_SCHEDULE_SZ,
 677                         ds->cipher->iv_len);
 678                 printf("\t\tIV: ");
 679                 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
 680                 printf("\n");
 681                 printf("\trec->input=");
 682                 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
 683                 printf("\n");
 684                 }
 685 #endif  /* KSSL_DEBUG */
 686
 687                 if (!send)
 688                         {
 689                         if (l == 0 || l%bs != 0)
 690                                 {
 691                                 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
 692                                 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
 693                                 return 0;
 694                                 }
 695                         }
 696
 697                 EVP_Cipher(ds,rec->data,rec->input,l);
 698
 699 #ifdef KSSL_DEBUG
 700                 {
 701                 unsigned long i;
 702                 printf("\trec->data=");
 703                 for (i=0; i<l; i++)
 704                         printf(" %02x", rec->data[i]);  printf("\n");
 705                 }
 706 #endif  /* KSSL_DEBUG */
 707
 708                 if ((bs != 1) && !send)
 709                         {
 710                         ii=i=rec->data[l-1]; /* padding_length */
 711                         i++;
 712                         /* NB: if compression is in operation the first packet
 713                          * may not be of even length so the padding bug check
 714                          * cannot be performed. This bug workaround has been
 715                          * around since SSLeay so hopefully it is either fixed
 716                          * now or no buggy implementation supports compression
 717                          * [steve]
 718                          */
 719                         if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
 720                                 && !s->expand)
 721                                 {
 722                                 /* First packet is even in size, so check */
 723                                 if ((memcmp(s->s3->read_sequence,
 724                                         "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
 725                                         s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
 726                                 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
 727                                         i--;
 728                                 }
 729                         /* TLS 1.0 does not bound the number of padding bytes by the block size.
 730                          * All of them must have value 'padding_length'. */
 731                         if (i > (int)rec->length)
 732                                 {
 733                                 /* Incorrect padding. SSLerr() and ssl3_alert are done
 734                                  * by caller: we don't want to reveal whether this is
 735                                  * a decryption error or a MAC verification failure
 736                                  * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
 737                                 return -1;
 738                                 }
 739                         for (j=(int)(l-i); j<(int)l; j++)
 740                                 {
 741                                 if (rec->data[j] != ii)
 742                                         {
 743                                         /* Incorrect padding */
 744                                         return -1;
 745                                         }
 746                                 }
 747                         rec->length-=i;
 748                         }
 749                 }
 750         return(1);
 751         }
 752 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
 753         {
 754         unsigned int ret;
 755         EVP_MD_CTX ctx, *d=NULL;
 756         int i;
 757
 758         if (s->s3->handshake_buffer)
 759                 if (!ssl3_digest_cached_records(s))
 760                         return 0;
 761
 762         for (i=0;i<SSL_MAX_DIGEST;i++)
 763                 {
 764                   if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
 765                         {
 766                         d=s->s3->handshake_dgst[i];
 767                         break;
 768                         }
 769                 }
 770         if (!d) {
 771                 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
 772                 return 0;
 773         }
 774
 775         EVP_MD_CTX_init(&ctx);
 776         EVP_MD_CTX_copy_ex(&ctx,d);
 777         EVP_DigestFinal_ex(&ctx,out,&ret);
 778         EVP_MD_CTX_cleanup(&ctx);
 779         return((int)ret);
 780         }
 781
 782 int tls1_final_finish_mac(SSL *s,
 783              const char *str, int slen, unsigned char *out)
 784         {
 785         unsigned int i;
 786         EVP_MD_CTX ctx;
 787         unsigned char buf[2*EVP_MAX_MD_SIZE];
 788         unsigned char *q,buf2[12];
 789         int idx;
 790         long mask;
 791         int err=0;
 792         const EVP_MD *md;
 793
 794         q=buf;
 795
 796         if (s->s3->handshake_buffer)
 797                 if (!ssl3_digest_cached_records(s))
 798                         return 0;
 799
 800         EVP_MD_CTX_init(&ctx);
 801
 802         for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
 803                 {
 804                 if (mask & s->s3->tmp.new_cipher->algorithm2)
 805                         {
 806                         int hashsize = EVP_MD_size(md);
 807                         if (hashsize < 0 || hashsize > (sizeof buf - (size_t)(q-buf)))
 808                                 {
 809                                 /* internal error: 'buf' is too small for this cipersuite! */
 810                                 err = 1;
 811                                 }
 812                         else
 813                                 {
 814                                 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
 815                                 EVP_DigestFinal_ex(&ctx,q,&i);
 816                                 if (i != hashsize) /* can't really happen */
 817                                         err = 1;
 818                                 q+=i;
 819                                 }
 820                         }
 821                 }
 822
 823         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 824                  str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
 825                  s->session->master_key,s->session->master_key_length,
 826                  out,buf2,sizeof buf2);
 827         EVP_MD_CTX_cleanup(&ctx);
 828
 829         if (err)
 830                 return 0;
 831         else
 832                 return sizeof buf2;
 833         }
 834
 835 int tls1_mac(SSL *ssl, unsigned char *md, int send)
 836         {
 837         SSL3_RECORD *rec;
 838         unsigned char *mac_sec,*seq;
 839         EVP_MD_CTX *hash;
 840         size_t md_size;
 841         int i;
 842         EVP_MD_CTX hmac, *mac_ctx;
 843         unsigned char buf[5];
 844         int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
 845         int t;
 846
 847         if (send)
 848                 {
 849                 rec= &(ssl->s3->wrec);
 850                 mac_sec= &(ssl->s3->write_mac_secret[0]);
 851                 seq= &(ssl->s3->write_sequence[0]);
 852                 hash=ssl->write_hash;
 853                 }
 854         else
 855                 {
 856                 rec= &(ssl->s3->rrec);
 857                 mac_sec= &(ssl->s3->read_mac_secret[0]);
 858                 seq= &(ssl->s3->read_sequence[0]);
 859                 hash=ssl->read_hash;
 860                 }
 861
 862         t=EVP_MD_CTX_size(hash);
 863         OPENSSL_assert(t >= 0);
 864         md_size=t;
 865
 866         buf[0]=rec->type;
 867         buf[1]=(unsigned char)(ssl->version>>8);
 868         buf[2]=(unsigned char)(ssl->version);
 869         buf[3]=rec->length>>8;
 870         buf[4]=rec->length&0xff;
 871
 872         /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
 873         if (stream_mac)
 874                 {
 875                         mac_ctx = hash;
 876                 }
 877                 else
 878                 {
 879                         EVP_MD_CTX_copy(&hmac,hash);
 880                         mac_ctx = &hmac;
 881                 }
 882
 883         if (ssl->version == DTLS1_VERSION)
 884                 {
 885                 unsigned char dtlsseq[8],*p=dtlsseq;
 886
 887                 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
 888                 memcpy (p,&seq[2],6);
 889
 890                 EVP_DigestSignUpdate(mac_ctx,dtlsseq,8);
 891                 }
 892         else
 893                 EVP_DigestSignUpdate(mac_ctx,seq,8);
 894
 895         EVP_DigestSignUpdate(mac_ctx,buf,5);
 896         EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
 897         t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
 898         OPENSSL_assert(t > 0);
 899
 900         if (!stream_mac) EVP_MD_CTX_cleanup(&hmac);
 901 #ifdef TLS_DEBUG
 902 printf("sec=");
 903 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
 904 printf("seq=");
 905 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
 906 printf("buf=");
 907 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
 908 printf("rec=");
 909 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
 910 #endif
 911
 912         if (ssl->version != DTLS1_VERSION)
 913                 {
 914                 for (i=7; i>=0; i--)
 915                         {
 916                         ++seq[i];
 917                         if (seq[i] != 0) break;
 918                         }
 919                 }
 920
 921 #ifdef TLS_DEBUG
 922 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
 923 #endif
 924         return(md_size);
 925         }
 926
 927 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 928              int len)
 929         {
 930         unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
 931         const void *co = NULL, *so = NULL;
 932         int col = 0, sol = 0;
 933
 934 #ifdef KSSL_DEBUG
 935         printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
 936 #endif  /* KSSL_DEBUG */
 937
 938 #ifdef TLSEXT_TYPE_opaque_prf_input
 939         if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
 940             s->s3->client_opaque_prf_input_len > 0 &&
 941             s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
 942                 {
 943                 co = s->s3->client_opaque_prf_input;
 944                 col = s->s3->server_opaque_prf_input_len;
 945                 so = s->s3->server_opaque_prf_input;
 946                 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) */
 947                 }
 948 #endif
 949
 950         tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
 951                 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
 952                 s->s3->client_random,SSL3_RANDOM_SIZE,
 953                 co, col,
 954                 s->s3->server_random,SSL3_RANDOM_SIZE,
 955                 so, sol,
 956                 p,len,
 957                 s->session->master_key,buff,sizeof buff);
 958
 959 #ifdef KSSL_DEBUG
 960         printf ("tls1_generate_master_secret() complete\n");
 961 #endif  /* KSSL_DEBUG */
 962         return(SSL3_MASTER_SECRET_SIZE);
 963         }
 964
 965 int tls1_alert_code(int code)
 966         {
 967         switch (code)
 968                 {
 969         case SSL_AD_CLOSE_NOTIFY:       return(SSL3_AD_CLOSE_NOTIFY);
 970         case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
 971         case SSL_AD_BAD_RECORD_MAC:     return(SSL3_AD_BAD_RECORD_MAC);
 972         case SSL_AD_DECRYPTION_FAILED:  return(TLS1_AD_DECRYPTION_FAILED);
 973         case SSL_AD_RECORD_OVERFLOW:    return(TLS1_AD_RECORD_OVERFLOW);
 974         case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
 975         case SSL_AD_HANDSHAKE_FAILURE:  return(SSL3_AD_HANDSHAKE_FAILURE);
 976         case SSL_AD_NO_CERTIFICATE:     return(-1);
 977         case SSL_AD_BAD_CERTIFICATE:    return(SSL3_AD_BAD_CERTIFICATE);
 978         case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
 979         case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
 980         case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
 981         case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
 982         case SSL_AD_ILLEGAL_PARAMETER:  return(SSL3_AD_ILLEGAL_PARAMETER);
 983         case SSL_AD_UNKNOWN_CA:         return(TLS1_AD_UNKNOWN_CA);
 984         case SSL_AD_ACCESS_DENIED:      return(TLS1_AD_ACCESS_DENIED);
 985         case SSL_AD_DECODE_ERROR:       return(TLS1_AD_DECODE_ERROR);
 986         case SSL_AD_DECRYPT_ERROR:      return(TLS1_AD_DECRYPT_ERROR);
 987         case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
 988         case SSL_AD_PROTOCOL_VERSION:   return(TLS1_AD_PROTOCOL_VERSION);
 989         case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
 990         case SSL_AD_INTERNAL_ERROR:     return(TLS1_AD_INTERNAL_ERROR);
 991         case SSL_AD_USER_CANCELLED:     return(TLS1_AD_USER_CANCELLED);
 992         case SSL_AD_NO_RENEGOTIATION:   return(TLS1_AD_NO_RENEGOTIATION);
 993         case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
 994         case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
 995         case SSL_AD_UNRECOGNIZED_NAME:  return(TLS1_AD_UNRECOGNIZED_NAME);
 996         case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
 997         case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
 998         case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
 999 #if 0 /* not appropriate for TLS, not used for DTLS */
1000         case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1001                                           (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1002 #endif
1003         default:                        return(-1);
1004                 }
1005         }
1006