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             goto err;
  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     if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE)))
 231         goto err2;
 232
 233 #ifdef OPENSSL_SSL_TRACE_CRYPTO
 234     if (s->msg_callback) {
 235
 236         int wh = which & SSL3_CC_WRITE ?
 237             TLS1_RT_CRYPTO_WRITE : TLS1_RT_CRYPTO_READ;
 238         s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC,
 239                         mac_secret, EVP_MD_size(m), s, s->msg_callback_arg);
 240         if (c->key_len)
 241             s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,
 242                             key, c->key_len, s, s->msg_callback_arg);
 243         if (k) {
 244             s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_IV,
 245                             iv, k, s, s->msg_callback_arg);
 246         }
 247     }
 248 #endif
 249
 250     OPENSSL_cleanse(exp_key, sizeof(exp_key));
 251     OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
 252     return (1);
 253  err:
 254     SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE, ERR_R_MALLOC_FAILURE);
 255  err2:
 256     OPENSSL_cleanse(exp_key, sizeof(exp_key));
 257     OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
 258     return (0);
 259 }
 260
 261 int ssl3_setup_key_block(SSL *s)
 262 {
 263     unsigned char *p;
 264     const EVP_CIPHER *c;
 265     const EVP_MD *hash;
 266     int num;
 267     int ret = 0;
 268     SSL_COMP *comp;
 269
 270     if (s->s3->tmp.key_block_length != 0)
 271         return (1);
 272
 273     if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL, &comp, 0)) {
 274         SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 275         return (0);
 276     }
 277
 278     s->s3->tmp.new_sym_enc = c;
 279     s->s3->tmp.new_hash = hash;
 280 #ifdef OPENSSL_NO_COMP
 281     s->s3->tmp.new_compression = NULL;
 282 #else
 283     s->s3->tmp.new_compression = comp;
 284 #endif
 285
 286     num = EVP_MD_size(hash);
 287     if (num < 0)
 288         return 0;
 289
 290     num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c);
 291     num *= 2;
 292
 293     ssl3_cleanup_key_block(s);
 294
 295     if ((p = OPENSSL_malloc(num)) == NULL)
 296         goto err;
 297
 298     s->s3->tmp.key_block_length = num;
 299     s->s3->tmp.key_block = p;
 300
 301     ret = ssl3_generate_key_block(s, p, num);
 302
 303     if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) {
 304         /*
 305          * enable vulnerability countermeasure for CBC ciphers with known-IV
 306          * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 307          */
 308         s->s3->need_empty_fragments = 1;
 309
 310         if (s->session->cipher != NULL) {
 311             if (s->session->cipher->algorithm_enc == SSL_eNULL)
 312                 s->s3->need_empty_fragments = 0;
 313
 314 #ifndef OPENSSL_NO_RC4
 315             if (s->session->cipher->algorithm_enc == SSL_RC4)
 316                 s->s3->need_empty_fragments = 0;
 317 #endif
 318         }
 319     }
 320
 321     return ret;
 322
 323  err:
 324     SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK, ERR_R_MALLOC_FAILURE);
 325     return (0);
 326 }
 327
 328 void ssl3_cleanup_key_block(SSL *s)
 329 {
 330     OPENSSL_clear_free(s->s3->tmp.key_block, s->s3->tmp.key_block_length);
 331     s->s3->tmp.key_block = NULL;
 332     s->s3->tmp.key_block_length = 0;
 333 }
 334
 335 int ssl3_init_finished_mac(SSL *s)
 336 {
 337     BIO *buf = BIO_new(BIO_s_mem());
 338
 339     if (buf == NULL) {
 340         SSLerr(SSL_F_SSL3_INIT_FINISHED_MAC, ERR_R_MALLOC_FAILURE);
 341         return 0;
 342     }
 343     ssl3_free_digest_list(s);
 344     s->s3->handshake_buffer = buf;
 345     (void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE);
 346     return 1;
 347 }
 348
 349 /*
 350  * Free digest list. Also frees handshake buffer since they are always freed
 351  * together.
 352  */
 353
 354 void ssl3_free_digest_list(SSL *s)
 355 {
 356     BIO_free(s->s3->handshake_buffer);
 357     s->s3->handshake_buffer = NULL;
 358     EVP_MD_CTX_free(s->s3->handshake_dgst);
 359     s->s3->handshake_dgst = NULL;
 360 }
 361
 362 int ssl3_finish_mac(SSL *s, const unsigned char *buf, size_t len)
 363 {
 364     if (s->s3->handshake_dgst == NULL) {
 365         int ret;
 366         /* Note: this writes to a memory BIO so a failure is a fatal error */
 367         if (len > INT_MAX)
 368             return 0;
 369         ret = BIO_write(s->s3->handshake_buffer, (void *)buf, (int)len);
 370         return ret > 0 && ret == (int)len;
 371     } else {
 372         return EVP_DigestUpdate(s->s3->handshake_dgst, buf, len);
 373     }
 374 }
 375
 376 int ssl3_digest_cached_records(SSL *s, int keep)
 377 {
 378     const EVP_MD *md;
 379     long hdatalen;
 380     void *hdata;
 381
 382     if (s->s3->handshake_dgst == NULL) {
 383         hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
 384         if (hdatalen <= 0) {
 385             SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 386                    SSL_R_BAD_HANDSHAKE_LENGTH);
 387             return 0;
 388         }
 389
 390         s->s3->handshake_dgst = EVP_MD_CTX_new();
 391         if (s->s3->handshake_dgst == NULL) {
 392             SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_MALLOC_FAILURE);
 393             return 0;
 394         }
 395
 396         md = ssl_handshake_md(s);
 397         if (md == NULL || !EVP_DigestInit_ex(s->s3->handshake_dgst, md, NULL)
 398             || !EVP_DigestUpdate(s->s3->handshake_dgst, hdata, hdatalen)) {
 399             SSLerr(SSL_F_SSL3_DIGEST_CACHED_RECORDS, ERR_R_INTERNAL_ERROR);
 400             return 0;
 401         }
 402     }
 403     if (keep == 0) {
 404         BIO_free(s->s3->handshake_buffer);
 405         s->s3->handshake_buffer = NULL;
 406     }
 407
 408     return 1;
 409 }
 410
 411 size_t ssl3_final_finish_mac(SSL *s, const char *sender, size_t len,
 412                              unsigned char *p)
 413 {
 414     int ret;
 415     EVP_MD_CTX *ctx = NULL;
 416
 417     if (!ssl3_digest_cached_records(s, 0))
 418         return 0;
 419
 420     if (EVP_MD_CTX_type(s->s3->handshake_dgst) != NID_md5_sha1) {
 421         SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, SSL_R_NO_REQUIRED_DIGEST);
 422         return 0;
 423     }
 424
 425     ctx = EVP_MD_CTX_new();
 426     if (ctx == NULL) {
 427         SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_MALLOC_FAILURE);
 428         return 0;
 429     }
 430     if (!EVP_MD_CTX_copy_ex(ctx, s->s3->handshake_dgst)) {
 431         SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_INTERNAL_ERROR);
 432         return 0;
 433     }
 434
 435     ret = EVP_MD_CTX_size(ctx);
 436     if (ret < 0) {
 437         EVP_MD_CTX_reset(ctx);
 438         return 0;
 439     }
 440
 441     if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0)
 442         || EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET,
 443                            (int)s->session->master_key_length,
 444                            s->session->master_key) <= 0
 445         || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
 446         SSLerr(SSL_F_SSL3_FINAL_FINISH_MAC, ERR_R_INTERNAL_ERROR);
 447         ret = 0;
 448     }
 449
 450     EVP_MD_CTX_free(ctx);
 451
 452     return ret;
 453 }
 454
 455 int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 456                                 size_t len, size_t *secret_size)
 457 {
 458     static const unsigned char *salt[3] = {
 459 #ifndef CHARSET_EBCDIC
 460         (const unsigned char *)"A",
 461         (const unsigned char *)"BB",
 462         (const unsigned char *)"CCC",
 463 #else
 464         (const unsigned char *)"\x41",
 465         (const unsigned char *)"\x42\x42",
 466         (const unsigned char *)"\x43\x43\x43",
 467 #endif
 468     };
 469     unsigned char buf[EVP_MAX_MD_SIZE];
 470     EVP_MD_CTX *ctx = EVP_MD_CTX_new();
 471     int i, ret = 1;
 472     unsigned int n;
 473 #ifdef OPENSSL_SSL_TRACE_CRYPTO
 474     unsigned char *tmpout = out;
 475 #endif
 476     size_t ret_secret_size = 0;
 477
 478     if (ctx == NULL) {
 479         SSLerr(SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_MALLOC_FAILURE);
 480         return 0;
 481     }
 482     for (i = 0; i < 3; i++) {
 483         if (EVP_DigestInit_ex(ctx, s->ctx->sha1, NULL) <= 0
 484             || EVP_DigestUpdate(ctx, salt[i],
 485                                 strlen((const char *)salt[i])) <= 0
 486             || EVP_DigestUpdate(ctx, p, len) <= 0
 487             || EVP_DigestUpdate(ctx, &(s->s3->client_random[0]),
 488                                 SSL3_RANDOM_SIZE) <= 0
 489             || EVP_DigestUpdate(ctx, &(s->s3->server_random[0]),
 490                                 SSL3_RANDOM_SIZE) <= 0
 491                /* TODO(size_t) : convert me */
 492             || EVP_DigestFinal_ex(ctx, buf, &n) <= 0
 493             || EVP_DigestInit_ex(ctx, s->ctx->md5, NULL) <= 0
 494             || EVP_DigestUpdate(ctx, p, len) <= 0
 495             || EVP_DigestUpdate(ctx, buf, n) <= 0
 496             || EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
 497             SSLerr(SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR);
 498             ret = 0;
 499             break;
 500         }
 501         out += n;
 502         ret_secret_size += n;
 503     }
 504     EVP_MD_CTX_free(ctx);
 505
 506 #ifdef OPENSSL_SSL_TRACE_CRYPTO
 507     if (ret && s->msg_callback) {
 508         s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER,
 509                         p, len, s, s->msg_callback_arg);
 510         s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM,
 511                         s->s3->client_random, SSL3_RANDOM_SIZE,
 512                         s, s->msg_callback_arg);
 513         s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM,
 514                         s->s3->server_random, SSL3_RANDOM_SIZE,
 515                         s, s->msg_callback_arg);
 516         s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER,
 517                         tmpout, SSL3_MASTER_SECRET_SIZE,
 518                         s, s->msg_callback_arg);
 519     }
 520 #endif
 521     OPENSSL_cleanse(buf, sizeof(buf));
 522     if (ret)
 523         *secret_size = ret_secret_size;
 524     return ret;
 525 }
 526
 527 int ssl3_alert_code(int code)
 528 {
 529     switch (code) {
 530     case SSL_AD_CLOSE_NOTIFY:
 531         return (SSL3_AD_CLOSE_NOTIFY);
 532     case SSL_AD_UNEXPECTED_MESSAGE:
 533         return (SSL3_AD_UNEXPECTED_MESSAGE);
 534     case SSL_AD_BAD_RECORD_MAC:
 535         return (SSL3_AD_BAD_RECORD_MAC);
 536     case SSL_AD_DECRYPTION_FAILED:
 537         return (SSL3_AD_BAD_RECORD_MAC);
 538     case SSL_AD_RECORD_OVERFLOW:
 539         return (SSL3_AD_BAD_RECORD_MAC);
 540     case SSL_AD_DECOMPRESSION_FAILURE:
 541         return (SSL3_AD_DECOMPRESSION_FAILURE);
 542     case SSL_AD_HANDSHAKE_FAILURE:
 543         return (SSL3_AD_HANDSHAKE_FAILURE);
 544     case SSL_AD_NO_CERTIFICATE:
 545         return (SSL3_AD_NO_CERTIFICATE);
 546     case SSL_AD_BAD_CERTIFICATE:
 547         return (SSL3_AD_BAD_CERTIFICATE);
 548     case SSL_AD_UNSUPPORTED_CERTIFICATE:
 549         return (SSL3_AD_UNSUPPORTED_CERTIFICATE);
 550     case SSL_AD_CERTIFICATE_REVOKED:
 551         return (SSL3_AD_CERTIFICATE_REVOKED);
 552     case SSL_AD_CERTIFICATE_EXPIRED:
 553         return (SSL3_AD_CERTIFICATE_EXPIRED);
 554     case SSL_AD_CERTIFICATE_UNKNOWN:
 555         return (SSL3_AD_CERTIFICATE_UNKNOWN);
 556     case SSL_AD_ILLEGAL_PARAMETER:
 557         return (SSL3_AD_ILLEGAL_PARAMETER);
 558     case SSL_AD_UNKNOWN_CA:
 559         return (SSL3_AD_BAD_CERTIFICATE);
 560     case SSL_AD_ACCESS_DENIED:
 561         return (SSL3_AD_HANDSHAKE_FAILURE);
 562     case SSL_AD_DECODE_ERROR:
 563         return (SSL3_AD_HANDSHAKE_FAILURE);
 564     case SSL_AD_DECRYPT_ERROR:
 565         return (SSL3_AD_HANDSHAKE_FAILURE);
 566     case SSL_AD_EXPORT_RESTRICTION:
 567         return (SSL3_AD_HANDSHAKE_FAILURE);
 568     case SSL_AD_PROTOCOL_VERSION:
 569         return (SSL3_AD_HANDSHAKE_FAILURE);
 570     case SSL_AD_INSUFFICIENT_SECURITY:
 571         return (SSL3_AD_HANDSHAKE_FAILURE);
 572     case SSL_AD_INTERNAL_ERROR:
 573         return (SSL3_AD_HANDSHAKE_FAILURE);
 574     case SSL_AD_USER_CANCELLED:
 575         return (SSL3_AD_HANDSHAKE_FAILURE);
 576     case SSL_AD_NO_RENEGOTIATION:
 577         return (-1);            /* Don't send it :-) */
 578     case SSL_AD_UNSUPPORTED_EXTENSION:
 579         return (SSL3_AD_HANDSHAKE_FAILURE);
 580     case SSL_AD_CERTIFICATE_UNOBTAINABLE:
 581         return (SSL3_AD_HANDSHAKE_FAILURE);
 582     case SSL_AD_UNRECOGNIZED_NAME:
 583         return (SSL3_AD_HANDSHAKE_FAILURE);
 584     case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
 585         return (SSL3_AD_HANDSHAKE_FAILURE);
 586     case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
 587         return (SSL3_AD_HANDSHAKE_FAILURE);
 588     case SSL_AD_UNKNOWN_PSK_IDENTITY:
 589         return (TLS1_AD_UNKNOWN_PSK_IDENTITY);
 590     case SSL_AD_INAPPROPRIATE_FALLBACK:
 591         return (TLS1_AD_INAPPROPRIATE_FALLBACK);
 592     case SSL_AD_NO_APPLICATION_PROTOCOL:
 593         return (TLS1_AD_NO_APPLICATION_PROTOCOL);
 594     case SSL_AD_CERTIFICATE_REQUIRED:
 595         return SSL_AD_HANDSHAKE_FAILURE;
 596     default:
 597         return (-1);
 598     }
 599 }