ssl/s3_enc.c

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /* ====================================================================
  11  * Copyright 2005 Nokia. All rights reserved.
  12  *
  13  * The portions of the attached software ("Contribution") is developed by
  14  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
  15  * license.
  16  *
  17  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
  18  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
  19  * support (see RFC 4279) to OpenSSL.
  20  *
  21  * No patent licenses or other rights except those expressly stated in
  22  * the OpenSSL open source license shall be deemed granted or received
  23  * expressly, by implication, estoppel, or otherwise.
  24  *
  25  * No assurances are provided by Nokia that the Contribution does not
  26  * infringe the patent or other intellectual property rights of any third
  27  * party or that the license provides you with all the necessary rights
  28  * to make use of the Contribution.
  29  *
  30  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
  31  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
  32  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
  33  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
  34  * OTHERWISE.
  35  */
  36
  37 #include <stdio.h>
  38 #include "ssl_locl.h"
  39 #include <openssl/evp.h>
  40 #include <openssl/md5.h>
  41
  42 static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
  43 {
  44     EVP_MD_CTX *m5;
  45     EVP_MD_CTX *s1;
  46     unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
  47     unsigned char c = 'A';
  48     unsigned int i, j, k;
  49     int ret = 0;
  50
  51 #ifdef CHARSET_EBCDIC
  52     c = os_toascii[c];          /* 'A' in ASCII */
  53 #endif
  54     k = 0;
  55     m5 = EVP_MD_CTX_new();
  56     s1 = EVP_MD_CTX_new();
  57     if (m5 == NULL || s1 == NULL) {
  58         SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
  59         goto err;
  60     }
  61     EVP_MD_CTX_set_flags(m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
  62     for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
  63         k++;
  64         if (k > sizeof buf) {
  65             /* bug: 'buf' is too small for this ciphersuite */
  66             SSLerr(SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
  67             return 0;
  68         }
  69
  70         for (j = 0; j < k; j++)
  71             buf[j] = c;
  72         c++;
  73         if (!EVP_DigestInit_ex(s1, EVP_sha1(), NULL)
  74             || !EVP_DigestUpdate(s1, buf, k)
  75             || !EVP_DigestUpdate(s1, s->session->master_key,
  76                                  s->session->master_key_length)
  77             || !EVP_DigestUpdate(s1, s->s3->server_random, SSL3_RANDOM_SIZE)
  78             || !EVP_DigestUpdate(s1, s->s3->client_random, SSL3_RANDOM_SIZE)
  79             || !EVP_DigestFinal_ex(s1, smd, NULL)
  80             || !EVP_DigestInit_ex(m5, EVP_md5(), NULL)
  81             || !EVP_DigestUpdate(m5, s->session->master_key,
  82                                  s->session->master_key_length)
  83             || !EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH))
  84             goto err;
  85         if ((int)(i + MD5_DIGEST_LENGTH) > num) {
  86             if (!EVP_DigestFinal_ex(m5, smd, NULL))
  87                 goto err;
  88             memcpy(km, smd, (num - i));
  89         } else {
  90             if (!EVP_DigestFinal_ex(m5, km, NULL))
  91                 goto err;
  92         }
  93
  94         km += MD5_DIGEST_LENGTH;
  95     }
  96     OPENSSL_cleanse(smd, sizeof(smd));
  97     ret = 1;
  98  err:
  99     EVP_MD_CTX_free(m5);
 100     EVP_MD_CTX_free(s1);
 101     return ret;
 102 }
 103
 104 int ssl3_change_cipher_state(SSL *s, int which)
 105 {
 106     unsigned char *p, *mac_secret;
 107     unsigned char exp_key[EVP_MAX_KEY_LENGTH];
 108     unsigned char exp_iv[EVP_MAX_IV_LENGTH];
 109     unsigned char *ms, *key, *iv;
 110     EVP_CIPHER_CTX *dd;
 111     const EVP_CIPHER *c;
 112 #ifndef OPENSSL_NO_COMP
 113     COMP_METHOD *comp;
 114 #endif
 115     const EVP_MD *m;
 116     int mdi;
 117     size_t n, i, j, k, cl;
 118     int reuse_dd = 0;
 119
 120     c = s->s3->tmp.new_sym_enc;
 121     m = s->s3->tmp.new_hash;
 122     /* m == NULL will lead to a crash later */
 123     OPENSSL_assert(m);
 124 #ifndef OPENSSL_NO_COMP
 125     if (s->s3->tmp.new_compression == NULL)
 126         comp = NULL;
 127     else
 128         comp = s->s3->tmp.new_compression->method;
 129 #endif
 130
 131     if (which & SSL3_CC_READ) {
 132         if (s->enc_read_ctx != NULL)
 133             reuse_dd = 1;
 134         else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL)
 135             goto err;
 136         else
 137             /*
 138              * make sure it's initialised in case we exit later with an error
 139              */
 140             EVP_CIPHER_CTX_reset(s->enc_read_ctx);
 141         dd = s->enc_read_ctx;
 142
 143         if (ssl_replace_hash(&s->read_hash, m) == NULL) {
 144             SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
 145             goto err2;
 146         }
 147 #ifndef OPENSSL_NO_COMP
 148         /* COMPRESS */
 149         COMP_CTX_free(s->expand);
 150         s->expand = NULL;
 151         if (comp != NULL) {
 152             s->expand = COMP_CTX_new(comp);
 153             if (s->expand == NULL) {
 154                 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,
 155                        SSL_R_COMPRESSION_LIBRARY_ERROR);
 156                 goto err2;
 157             }
 158         }
 159 #endif
 160         RECORD_LAYER_reset_read_sequence(&s->rlayer);
 161         mac_secret = &(s->s3->read_mac_secret[0]);
 162     } else {
 163         if (s->enc_write_ctx != NULL)
 164             reuse_dd = 1;
 165         else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL)
 166             goto err;
 167         else
 168             /*
 169              * make sure it's initialised in case we exit later with an error
 170              */
 171             EVP_CIPHER_CTX_reset(s->enc_write_ctx);
 172         dd = s->enc_write_ctx;
 173         if (ssl_replace_hash(&s->write_hash, m) == NULL) {
 174             SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
 175             goto err2;
 176         }
 177 #ifndef OPENSSL_NO_COMP
 178         /* COMPRESS */
 179         COMP_CTX_free(s->compress);
 180         s->compress = NULL;
 181         if (comp != NULL) {
 182             s->compress = COMP_CTX_new(comp);
 183             if (s->compress == NULL) {
 184                 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE,
 185                        SSL_R_COMPRESSION_LIBRARY_ERROR);
 186                 goto err2;
 187             }
 188         }
 189 #endif
 190         RECORD_LAYER_reset_write_sequence(&s->rlayer);
 191         mac_secret = &(s->s3->write_mac_secret[0]);
 192     }
 193
 194     if (reuse_dd)
 195         EVP_CIPHER_CTX_reset(dd);
 196
 197     p = s->s3->tmp.key_block;
 198     mdi = EVP_MD_size(m);
 199     if (mdi < 0)
 200         goto err2;
 201     i = mdi;
 202     cl = EVP_CIPHER_key_length(c);
 203     j = cl;
 204     k = EVP_CIPHER_iv_length(c);
 205     if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 206         (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
 207         ms = &(p[0]);
 208         n = i + i;
 209         key = &(p[n]);
 210         n += j + j;
 211         iv = &(p[n]);
 212         n += k + k;
 213     } else {
 214         n = i;
 215         ms = &(p[n]);
 216         n += i + j;
 217         key = &(p[n]);
 218         n += j + k;
 219         iv = &(p[n]);
 220         n += k;
 221     }
 222
 223     if (n > s->s3->tmp.key_block_length) {
 224         SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_INTERNAL_ERROR);
 225         goto err2;
 226     }
 227
 228     memcpy(mac_secret, ms, i);
 229
 230     EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE));
 231
 232 #ifdef OPENSSL_SSL_TRACE_CRYPTO
 233     if (s->msg_callback) {
 234
 235         int wh = which & SSL3_CC_WRITE ?
 236             TLS1_RT_CRYPTO_WRITE : TLS1_RT_CRYPTO_READ;
 237         s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC,
 238                         mac_secret, EVP_MD_size(m), s, s->msg_callback_arg);
 239         if (c->key_len)
 240             s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,
 241                             key, c->key_len, s, s->msg_callback_arg);
 242         if (k) {
 243             s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_IV,
 244                             iv, k, s, s->msg_callback_arg);
 245         }
 246     }
 247 #endif
 248
 249     OPENSSL_cleanse(exp_key, sizeof(exp_key));
 250     OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
 251     return (1);
 252  err:
 253     SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
 254  err2:
 255     OPENSSL_cleanse(exp_key, sizeof(exp_key));
 256     OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
 257     return (0);
 258 }
 259
 260 int ssl3_setup_key_block(SSL *s)
 261 {
 262     unsigned char *p;
 263     const EVP_CIPHER *c;
 264     const EVP_MD *hash;
 265     int num;
 266     int ret = 0;
 267     SSL_COMP *comp;
 268
 269     if (s->s3->tmp.key_block_length != 0)
 270         return (1);
 271
 272     if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL, &comp, 0)) {
 273         SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 274         return (0);
 275     }
 276
 277     s->s3->tmp.new_sym_enc = c;
 278     s->s3->tmp.new_hash = hash;
 279 #ifdef OPENSSL_NO_COMP
 280     s->s3->tmp.new_compression = NULL;
 281 #else
 282     s->s3->tmp.new_compression = comp;
 283 #endif
 284
 285     num = EVP_MD_size(hash);
 286     if (num < 0)
 287         return 0;
 288
 289     num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c);
 290     num *= 2;
 291
 292     ssl3_cleanup_key_block(s);
 293
 294     if ((p = OPENSSL_malloc(num)) == NULL)
 295         goto err;
 296
 297     s->s3->tmp.key_block_length = num;
 298     s->s3->tmp.key_block = p;
 299
 300     ret = ssl3_generate_key_block(s, p, num);
 301
 302     if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) {
 303         /*
 304          * enable vulnerability countermeasure for CBC ciphers with known-IV
 305          * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 306          */
 307         s->s3->need_empty_fragments = 1;
 308
 309         if (s->session->cipher != NULL) {
 310             if (s->session->cipher->algorithm_enc == SSL_eNULL)
 311                 s->s3->need_empty_fragments = 0;
 312
 313 #ifndef OPENSSL_NO_RC4
 314             if (s->session->cipher->algorithm_enc == SSL_RC4)
 315                 s->s3->need_empty_fragments = 0;
 316 #endif
 317         }
 318     }
 319
 320     return ret;
 321
 322  err:
 323     SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
 324     return (0);
 325 }
 326
 327 void ssl3_cleanup_key_block(SSL *s)
 328 {
 329     OPENSSL_clear_free(s->s3->tmp.key_block, s->s3->tmp.key_block_length);
 330     s->s3->tmp.key_block = NULL;
 331     s->s3->tmp.key_block_length = 0;
 332 }
 333
 334 int ssl3_init_finished_mac(SSL *s)
 335 {
 336     BIO *buf = BIO_new(BIO_s_mem());
 337
 338     if (buf == NULL) {
 339         SSLerr(SSL_F_SSL3_INIT_FINISHED_MAC, ERR_R_MALLOC_FAILURE);
 340         return 0;
 341     }
 342     ssl3_free_digest_list(s);
 343     s->s3->handshake_buffer = buf;
 344     (void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE);
 345     return 1;
 346 }
 347
 348 /*
 349  * Free digest list. Also frees handshake buffer since they are always freed
 350  * together.
 351  */
 352
 353 void ssl3_free_digest_list(SSL *s)
 354 {
 355     BIO_free(s->s3->handshake_buffer);
 356     s->s3->handshake_buffer = NULL;
 357     EVP_MD_CTX_free(s->s3->handshake_dgst);
 358     s->s3->handshake_dgst = NULL;
 359 }
 360
 361 int ssl3_finish_mac(SSL *s, const unsigned char *buf, size_t len)
 362 {
 363     if (s->s3->handshake_dgst == NULL) {
 364         int ret;
 365         /* Note: this writes to a memory BIO so a failure is a fatal error */
 366         if (len > INT_MAX)
 367             return 0;
 368         ret = BIO_write(s->s3->handshake_buffer, (void *)buf, (int)len);
 369         return ret > 0 && ret == (int)len;
 370     } else {
 371         return EVP_DigestUpdate(s->s3->handshake_dgst, buf, len);
 372     }
 373 }
 374
 375 int ssl3_digest_cached_records(SSL *s, int keep)
 376 {
 377     const EVP_MD *md;
 378     long hdatalen;
 379     void *hdata;
 380
 381     if (s->s3->handshake_dgst == NULL) {
 382         hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
 383         if (hdatalen <= 0) {
 384             SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 385                    SSL_R_BAD_HANDSHAKE_LENGTH);
 386             return 0;
 387         }
 388
 389         s->s3->handshake_dgst = EVP_MD_CTX_new();
 390         if (s->s3->handshake_dgst == NULL) {
 391             SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_MALLOC_FAILURE);
 392             return 0;
 393         }
 394
 395         md = ssl_handshake_md(s);
 396         if (md == NULL || !EVP_DigestInit_ex(s->s3->handshake_dgst, md, NULL)
 397             || !EVP_DigestUpdate(s->s3->handshake_dgst, hdata, hdatalen)) {
 398             SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_INTERNAL_ERROR);
 399             return 0;
 400         }
 401     }
 402     if (keep == 0) {
 403         BIO_free(s->s3->handshake_buffer);
 404         s->s3->handshake_buffer = NULL;
 405     }
 406
 407     return 1;
 408 }
 409
 410 size_t ssl3_final_finish_mac(SSL *s, const char *sender, size_t len,
 411                              unsigned char *p)
 412 {
 413     int ret;
 414     EVP_MD_CTX *ctx = NULL;
 415
 416     if (!ssl3_digest_cached_records(s, 0))
 417         return 0;
 418
 419     if (EVP_MD_CTX_type(s->s3->handshake_dgst) != NID_md5_sha1) {
 420         SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, SSL_R_NO_REQUIRED_DIGEST);
 421         return 0;
 422     }
 423
 424     ctx = EVP_MD_CTX_new();
 425     if (ctx == NULL) {
 426         SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_MALLOC_FAILURE);
 427         return 0;
 428     }
 429     if (!EVP_MD_CTX_copy_ex(ctx, s->s3->handshake_dgst)) {
 430         SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_INTERNAL_ERROR);
 431         return 0;
 432     }
 433
 434     ret = EVP_MD_CTX_size(ctx);
 435     if (ret < 0) {
 436         EVP_MD_CTX_reset(ctx);
 437         return 0;
 438     }
 439
 440     if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0)
 441         || EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET,
 442                            (int)s->session->master_key_length,
 443                            s->session->master_key) <= 0
 444         || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
 445         SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_INTERNAL_ERROR);
 446         ret = 0;
 447     }
 448
 449     EVP_MD_CTX_free(ctx);
 450
 451     return ret;
 452 }
 453
 454 int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 455                                 size_t len, size_t *secret_size)
 456 {
 457     static const unsigned char *salt[3] = {
 458 #ifndef CHARSET_EBCDIC
 459         (const unsigned char *)"A",
 460         (const unsigned char *)"BB",
 461         (const unsigned char *)"CCC",
 462 #else
 463         (const unsigned char *)"\x41",
 464         (const unsigned char *)"\x42\x42",
 465         (const unsigned char *)"\x43\x43\x43",
 466 #endif
 467     };
 468     unsigned char buf[EVP_MAX_MD_SIZE];
 469     EVP_MD_CTX *ctx = EVP_MD_CTX_new();
 470     int i, ret = 1;
 471     unsigned int n;
 472 #ifdef OPENSSL_SSL_TRACE_CRYPTO
 473     unsigned char *tmpout = out;
 474 #endif
 475     size_t ret_secret_size = 0;
 476
 477     if (ctx == NULL) {
 478         SSLerr(SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_MALLOC_FAILURE);
 479         return 0;
 480     }
 481     for (i = 0; i < 3; i++) {
 482         if (EVP_DigestInit_ex(ctx, s->ctx->sha1, NULL) <= 0
 483             || EVP_DigestUpdate(ctx, salt[i],
 484                                 strlen((const char *)salt[i])) <= 0
 485             || EVP_DigestUpdate(ctx, p, len) <= 0
 486             || EVP_DigestUpdate(ctx, &(s->s3->client_random[0]),
 487                                 SSL3_RANDOM_SIZE) <= 0
 488             || EVP_DigestUpdate(ctx, &(s->s3->server_random[0]),
 489                                 SSL3_RANDOM_SIZE) <= 0
 490                /* TODO(size_t) : convert me */
 491             || EVP_DigestFinal_ex(ctx, buf, &n) <= 0
 492             || EVP_DigestInit_ex(ctx, s->ctx->md5, NULL) <= 0
 493             || EVP_DigestUpdate(ctx, p, len) <= 0
 494             || EVP_DigestUpdate(ctx, buf, n) <= 0
 495             || EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
 496             SSLerr(SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR);
 497             ret = 0;
 498             break;
 499         }
 500         out += n;
 501         ret_secret_size += n;
 502     }
 503     EVP_MD_CTX_free(ctx);
 504
 505 #ifdef OPENSSL_SSL_TRACE_CRYPTO
 506     if (ret && s->msg_callback) {
 507         s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER,
 508                         p, len, s, s->msg_callback_arg);
 509         s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM,
 510                         s->s3->client_random, SSL3_RANDOM_SIZE,
 511                         s, s->msg_callback_arg);
 512         s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM,
 513                         s->s3->server_random, SSL3_RANDOM_SIZE,
 514                         s, s->msg_callback_arg);
 515         s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER,
 516                         tmpout, SSL3_MASTER_SECRET_SIZE,
 517                         s, s->msg_callback_arg);
 518     }
 519 #endif
 520     OPENSSL_cleanse(buf, sizeof(buf));
 521     if (ret)
 522         *secret_size = ret_secret_size;
 523     return ret;
 524 }
 525
 526 int ssl3_alert_code(int code)
 527 {
 528     switch (code) {
 529     case SSL_AD_CLOSE_NOTIFY:
 530         return (SSL3_AD_CLOSE_NOTIFY);
 531     case SSL_AD_UNEXPECTED_MESSAGE:
 532         return (SSL3_AD_UNEXPECTED_MESSAGE);
 533     case SSL_AD_BAD_RECORD_MAC:
 534         return (SSL3_AD_BAD_RECORD_MAC);
 535     case SSL_AD_DECRYPTION_FAILED:
 536         return (SSL3_AD_BAD_RECORD_MAC);
 537     case SSL_AD_RECORD_OVERFLOW:
 538         return (SSL3_AD_BAD_RECORD_MAC);
 539     case SSL_AD_DECOMPRESSION_FAILURE:
 540         return (SSL3_AD_DECOMPRESSION_FAILURE);
 541     case SSL_AD_HANDSHAKE_FAILURE:
 542         return (SSL3_AD_HANDSHAKE_FAILURE);
 543     case SSL_AD_NO_CERTIFICATE:
 544         return (SSL3_AD_NO_CERTIFICATE);
 545     case SSL_AD_BAD_CERTIFICATE:
 546         return (SSL3_AD_BAD_CERTIFICATE);
 547     case SSL_AD_UNSUPPORTED_CERTIFICATE:
 548         return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
 549     case SSL_AD_CERTIFICATE_REVOKED:
 550         return (SSL3_AD_CERTIFICATE_REVOKED);
 551     case SSL_AD_CERTIFICATE_EXPIRED:
 552         return (SSL3_AD_CERTIFICATE_EXPIRED);
 553     case SSL_AD_CERTIFICATE_UNKNOWN:
 554         return (SSL3_AD_CERTIFICATE_UNKNOWN);
 555     case SSL_AD_ILLEGAL_PARAMETER:
 556         return (SSL3_AD_ILLEGAL_PARAMETER);
 557     case SSL_AD_UNKNOWN_CA:
 558         return (SSL3_AD_BAD_CERTIFICATE);
 559     case SSL_AD_ACCESS_DENIED:
 560         return (SSL3_AD_HANDSHAKE_FAILURE);
 561     case SSL_AD_DECODE_ERROR:
 562         return (SSL3_AD_HANDSHAKE_FAILURE);
 563     case SSL_AD_DECRYPT_ERROR:
 564         return (SSL3_AD_HANDSHAKE_FAILURE);
 565     case SSL_AD_EXPORT_RESTRICTION:
 566         return (SSL3_AD_HANDSHAKE_FAILURE);
 567     case SSL_AD_PROTOCOL_VERSION:
 568         return (SSL3_AD_HANDSHAKE_FAILURE);
 569     case SSL_AD_INSUFFICIENT_SECURITY:
 570         return (SSL3_AD_HANDSHAKE_FAILURE);
 571     case SSL_AD_INTERNAL_ERROR:
 572         return (SSL3_AD_HANDSHAKE_FAILURE);
 573     case SSL_AD_USER_CANCELLED:
 574         return (SSL3_AD_HANDSHAKE_FAILURE);
 575     case SSL_AD_NO_RENEGOTIATION:
 576         return (-1);            /* Don't send it :-) */
 577     case SSL_AD_UNSUPPORTED_EXTENSION:
 578         return (SSL3_AD_HANDSHAKE_FAILURE);
 579     case SSL_AD_CERTIFICATE_UNOBTAINABLE:
 580         return (SSL3_AD_HANDSHAKE_FAILURE);
 581     case SSL_AD_UNRECOGNIZED_NAME:
 582         return (SSL3_AD_HANDSHAKE_FAILURE);
 583     case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
 584         return (SSL3_AD_HANDSHAKE_FAILURE);
 585     case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
 586         return (SSL3_AD_HANDSHAKE_FAILURE);
 587     case SSL_AD_UNKNOWN_PSK_IDENTITY:
 588         return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
 589     case SSL_AD_INAPPROPRIATE_FALLBACK:
 590         return (TLS1_AD_INAPPROPRIATE_FALLBACK);
 591     case SSL_AD_NO_APPLICATION_PROTOCOL:
 592         return (TLS1_AD_NO_APPLICATION_PROTOCOL);
 593     default:
 594         return (-1);
 595     }
 596 }