ssl/s3_enc.c

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  * Copyright 2005 Nokia. All rights reserved.
   4  *
   5  * Licensed under the OpenSSL license (the "License").  You may not use
   6  * this file except in compliance with the License.  You can obtain a copy
   7  * in the file LICENSE in the source distribution or at
   8  * https://www.openssl.org/source/license.html
   9  */
  10
  11 #include <stdio.h>
  12 #include "ssl_locl.h"
  13 #include <openssl/evp.h>
  14 #include <openssl/md5.h>
  15 #include "internal/cryptlib.h"
  16
  17 static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
  18 {
  19     EVP_MD_CTX *m5;
  20     EVP_MD_CTX *s1;
  21     unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
  22     unsigned char c = 'A';
  23     unsigned int i, j, k;
  24     int ret = 0;
  25
  26 #ifdef CHARSET_EBCDIC
  27     c = os_toascii[c];          /* 'A' in ASCII */
  28 #endif
  29     k = 0;
  30     m5 = EVP_MD_CTX_new();
  31     s1 = EVP_MD_CTX_new();
  32     if (m5 == NULL || s1 == NULL) {
  33         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
  34                  ERR_R_MALLOC_FAILURE);
  35         goto err;
  36     }
  37     EVP_MD_CTX_set_flags(m5, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
  38     for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
  39         k++;
  40         if (k > sizeof(buf)) {
  41             /* bug: 'buf' is too small for this ciphersuite */
  42             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
  43                      ERR_R_INTERNAL_ERROR);
  44             goto err;
  45         }
  46
  47         for (j = 0; j < k; j++)
  48             buf[j] = c;
  49         c++;
  50         if (!EVP_DigestInit_ex(s1, EVP_sha1(), NULL)
  51             || !EVP_DigestUpdate(s1, buf, k)
  52             || !EVP_DigestUpdate(s1, s->session->master_key,
  53                                  s->session->master_key_length)
  54             || !EVP_DigestUpdate(s1, s->s3->server_random, SSL3_RANDOM_SIZE)
  55             || !EVP_DigestUpdate(s1, s->s3->client_random, SSL3_RANDOM_SIZE)
  56             || !EVP_DigestFinal_ex(s1, smd, NULL)
  57             || !EVP_DigestInit_ex(m5, EVP_md5(), NULL)
  58             || !EVP_DigestUpdate(m5, s->session->master_key,
  59                                  s->session->master_key_length)
  60             || !EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH)) {
  61             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
  62                      ERR_R_INTERNAL_ERROR);
  63             goto err;
  64         }
  65         if ((int)(i + MD5_DIGEST_LENGTH) > num) {
  66             if (!EVP_DigestFinal_ex(m5, smd, NULL)) {
  67                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
  68                          SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
  69                 goto err;
  70             }
  71             memcpy(km, smd, (num - i));
  72         } else {
  73             if (!EVP_DigestFinal_ex(m5, km, NULL)) {
  74                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
  75                          SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
  76                 goto err;
  77             }
  78         }
  79
  80         km += MD5_DIGEST_LENGTH;
  81     }
  82     OPENSSL_cleanse(smd, sizeof(smd));
  83     ret = 1;
  84  err:
  85     EVP_MD_CTX_free(m5);
  86     EVP_MD_CTX_free(s1);
  87     return ret;
  88 }
  89
  90 int ssl3_change_cipher_state(SSL *s, int which)
  91 {
  92     unsigned char *p, *mac_secret;
  93     unsigned char exp_key[EVP_MAX_KEY_LENGTH];
  94     unsigned char exp_iv[EVP_MAX_IV_LENGTH];
  95     unsigned char *ms, *key, *iv;
  96     EVP_CIPHER_CTX *dd;
  97     const EVP_CIPHER *c;
  98 #ifndef OPENSSL_NO_COMP
  99     COMP_METHOD *comp;
 100 #endif
 101     const EVP_MD *m;
 102     int mdi;
 103     size_t n, i, j, k, cl;
 104     int reuse_dd = 0;
 105
 106     c = s->s3->tmp.new_sym_enc;
 107     m = s->s3->tmp.new_hash;
 108     /* m == NULL will lead to a crash later */
 109     if (!ossl_assert(m != NULL)) {
 110         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 111                  ERR_R_INTERNAL_ERROR);
 112         goto err;
 113     }
 114 #ifndef OPENSSL_NO_COMP
 115     if (s->s3->tmp.new_compression == NULL)
 116         comp = NULL;
 117     else
 118         comp = s->s3->tmp.new_compression->method;
 119 #endif
 120
 121     if (which & SSL3_CC_READ) {
 122         if (s->enc_read_ctx != NULL) {
 123             reuse_dd = 1;
 124         } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
 125             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 126                      ERR_R_MALLOC_FAILURE);
 127             goto err;
 128         } else {
 129             /*
 130              * make sure it's initialised in case we exit later with an error
 131              */
 132             EVP_CIPHER_CTX_reset(s->enc_read_ctx);
 133         }
 134         dd = s->enc_read_ctx;
 135
 136         if (ssl_replace_hash(&s->read_hash, m) == NULL) {
 137             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 138                      ERR_R_INTERNAL_ERROR);
 139             goto err;
 140         }
 141 #ifndef OPENSSL_NO_COMP
 142         /* COMPRESS */
 143         COMP_CTX_free(s->expand);
 144         s->expand = NULL;
 145         if (comp != NULL) {
 146             s->expand = COMP_CTX_new(comp);
 147             if (s->expand == NULL) {
 148                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 149                          SSL_F_SSL3_CHANGE_CIPHER_STATE,
 150                          SSL_R_COMPRESSION_LIBRARY_ERROR);
 151                 goto err;
 152             }
 153         }
 154 #endif
 155         RECORD_LAYER_reset_read_sequence(&s->rlayer);
 156         mac_secret = &(s->s3->read_mac_secret[0]);
 157     } else {
 158         if (s->enc_write_ctx != NULL) {
 159             reuse_dd = 1;
 160         } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
 161             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 162                      ERR_R_MALLOC_FAILURE);
 163             goto err;
 164         } else {
 165             /*
 166              * make sure it's initialised in case we exit later with an error
 167              */
 168             EVP_CIPHER_CTX_reset(s->enc_write_ctx);
 169         }
 170         dd = s->enc_write_ctx;
 171         if (ssl_replace_hash(&s->write_hash, m) == NULL) {
 172             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 173                      ERR_R_MALLOC_FAILURE);
 174             goto err;
 175         }
 176 #ifndef OPENSSL_NO_COMP
 177         /* COMPRESS */
 178         COMP_CTX_free(s->compress);
 179         s->compress = NULL;
 180         if (comp != NULL) {
 181             s->compress = COMP_CTX_new(comp);
 182             if (s->compress == NULL) {
 183                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 184                          SSL_F_SSL3_CHANGE_CIPHER_STATE,
 185                          SSL_R_COMPRESSION_LIBRARY_ERROR);
 186                 goto err;
 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         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 201                  ERR_R_INTERNAL_ERROR);
 202         goto err;
 203     }
 204     i = mdi;
 205     cl = EVP_CIPHER_key_length(c);
 206     j = cl;
 207     k = EVP_CIPHER_iv_length(c);
 208     if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 209         (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
 210         ms = &(p[0]);
 211         n = i + i;
 212         key = &(p[n]);
 213         n += j + j;
 214         iv = &(p[n]);
 215         n += k + k;
 216     } else {
 217         n = i;
 218         ms = &(p[n]);
 219         n += i + j;
 220         key = &(p[n]);
 221         n += j + k;
 222         iv = &(p[n]);
 223         n += k;
 224     }
 225
 226     if (n > s->s3->tmp.key_block_length) {
 227         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 228                  ERR_R_INTERNAL_ERROR);
 229         goto err;
 230     }
 231
 232     memcpy(mac_secret, ms, i);
 233
 234     if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
 235         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 236                  ERR_R_INTERNAL_ERROR);
 237         goto err;
 238     }
 239
 240     OPENSSL_cleanse(exp_key, sizeof(exp_key));
 241     OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
 242     return 1;
 243  err:
 244     OPENSSL_cleanse(exp_key, sizeof(exp_key));
 245     OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
 246     return 0;
 247 }
 248
 249 int ssl3_setup_key_block(SSL *s)
 250 {
 251     unsigned char *p;
 252     const EVP_CIPHER *c;
 253     const EVP_MD *hash;
 254     int num;
 255     int ret = 0;
 256     SSL_COMP *comp;
 257
 258     if (s->s3->tmp.key_block_length != 0)
 259         return 1;
 260
 261     if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL, &comp, 0)) {
 262         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_SETUP_KEY_BLOCK,
 263                  SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 264         return 0;
 265     }
 266
 267     s->s3->tmp.new_sym_enc = c;
 268     s->s3->tmp.new_hash = hash;
 269 #ifdef OPENSSL_NO_COMP
 270     s->s3->tmp.new_compression = NULL;
 271 #else
 272     s->s3->tmp.new_compression = comp;
 273 #endif
 274
 275     num = EVP_MD_size(hash);
 276     if (num < 0)
 277         return 0;
 278
 279     num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c);
 280     num *= 2;
 281
 282     ssl3_cleanup_key_block(s);
 283
 284     if ((p = OPENSSL_malloc(num)) == NULL) {
 285         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_SETUP_KEY_BLOCK,
 286                  ERR_R_MALLOC_FAILURE);
 287         return 0;
 288     }
 289
 290     s->s3->tmp.key_block_length = num;
 291     s->s3->tmp.key_block = p;
 292
 293     /* Calls SSLfatal() as required */
 294     ret = ssl3_generate_key_block(s, p, num);
 295
 296     if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) {
 297         /*
 298          * enable vulnerability countermeasure for CBC ciphers with known-IV
 299          * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 300          */
 301         s->s3->need_empty_fragments = 1;
 302
 303         if (s->session->cipher != NULL) {
 304             if (s->session->cipher->algorithm_enc == SSL_eNULL)
 305                 s->s3->need_empty_fragments = 0;
 306
 307 #ifndef OPENSSL_NO_RC4
 308             if (s->session->cipher->algorithm_enc == SSL_RC4)
 309                 s->s3->need_empty_fragments = 0;
 310 #endif
 311         }
 312     }
 313
 314     return ret;
 315 }
 316
 317 void ssl3_cleanup_key_block(SSL *s)
 318 {
 319     OPENSSL_clear_free(s->s3->tmp.key_block, s->s3->tmp.key_block_length);
 320     s->s3->tmp.key_block = NULL;
 321     s->s3->tmp.key_block_length = 0;
 322 }
 323
 324 int ssl3_init_finished_mac(SSL *s)
 325 {
 326     BIO *buf = BIO_new(BIO_s_mem());
 327
 328     if (buf == NULL) {
 329         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_INIT_FINISHED_MAC,
 330                  ERR_R_MALLOC_FAILURE);
 331         return 0;
 332     }
 333     ssl3_free_digest_list(s);
 334     s->s3->handshake_buffer = buf;
 335     (void)BIO_set_close(s->s3->handshake_buffer, BIO_CLOSE);
 336     return 1;
 337 }
 338
 339 /*
 340  * Free digest list. Also frees handshake buffer since they are always freed
 341  * together.
 342  */
 343
 344 void ssl3_free_digest_list(SSL *s)
 345 {
 346     BIO_free(s->s3->handshake_buffer);
 347     s->s3->handshake_buffer = NULL;
 348     EVP_MD_CTX_free(s->s3->handshake_dgst);
 349     s->s3->handshake_dgst = NULL;
 350 }
 351
 352 int ssl3_finish_mac(SSL *s, const unsigned char *buf, size_t len)
 353 {
 354     int ret;
 355
 356     if (s->s3->handshake_dgst == NULL) {
 357         /* Note: this writes to a memory BIO so a failure is a fatal error */
 358         if (len > INT_MAX) {
 359             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
 360                      SSL_R_OVERFLOW_ERROR);
 361             return 0;
 362         }
 363         ret = BIO_write(s->s3->handshake_buffer, (void *)buf, (int)len);
 364         if (ret <= 0 || ret != (int)len) {
 365             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
 366                      ERR_R_INTERNAL_ERROR);
 367             return 0;
 368         }
 369     } else {
 370         ret = EVP_DigestUpdate(s->s3->handshake_dgst, buf, len);
 371         if (!ret) {
 372             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
 373                      ERR_R_INTERNAL_ERROR);
 374             return 0;
 375         }
 376     }
 377     return 1;
 378 }
 379
 380 int ssl3_digest_cached_records(SSL *s, int keep)
 381 {
 382     const EVP_MD *md;
 383     long hdatalen;
 384     void *hdata;
 385
 386     if (s->s3->handshake_dgst == NULL) {
 387         hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
 388         if (hdatalen <= 0) {
 389             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 390                      SSL_R_BAD_HANDSHAKE_LENGTH);
 391             return 0;
 392         }
 393
 394         s->s3->handshake_dgst = EVP_MD_CTX_new();
 395         if (s->s3->handshake_dgst == NULL) {
 396             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 397                      ERR_R_MALLOC_FAILURE);
 398             return 0;
 399         }
 400
 401         md = ssl_handshake_md(s);
 402         if (md == NULL || !EVP_DigestInit_ex(s->s3->handshake_dgst, md, NULL)
 403             || !EVP_DigestUpdate(s->s3->handshake_dgst, hdata, hdatalen)) {
 404             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 405                      ERR_R_INTERNAL_ERROR);
 406             return 0;
 407         }
 408     }
 409     if (keep == 0) {
 410         BIO_free(s->s3->handshake_buffer);
 411         s->s3->handshake_buffer = NULL;
 412     }
 413
 414     return 1;
 415 }
 416
 417 size_t ssl3_final_finish_mac(SSL *s, const char *sender, size_t len,
 418                              unsigned char *p)
 419 {
 420     int ret;
 421     EVP_MD_CTX *ctx = NULL;
 422
 423     if (!ssl3_digest_cached_records(s, 0)) {
 424         /* SSLfatal() already called */
 425         return 0;
 426     }
 427
 428     if (EVP_MD_CTX_type(s->s3->handshake_dgst) != NID_md5_sha1) {
 429         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 430                  SSL_R_NO_REQUIRED_DIGEST);
 431         return 0;
 432     }
 433
 434     ctx = EVP_MD_CTX_new();
 435     if (ctx == NULL) {
 436         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 437                  ERR_R_MALLOC_FAILURE);
 438         return 0;
 439     }
 440     if (!EVP_MD_CTX_copy_ex(ctx, s->s3->handshake_dgst)) {
 441         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 442                  ERR_R_INTERNAL_ERROR);
 443         return 0;
 444     }
 445
 446     ret = EVP_MD_CTX_size(ctx);
 447     if (ret < 0) {
 448         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 449                  ERR_R_INTERNAL_ERROR);
 450         EVP_MD_CTX_reset(ctx);
 451         return 0;
 452     }
 453
 454     if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0)
 455         || EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET,
 456                            (int)s->session->master_key_length,
 457                            s->session->master_key) <= 0
 458         || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
 459         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 460                  ERR_R_INTERNAL_ERROR);
 461         ret = 0;
 462     }
 463
 464     EVP_MD_CTX_free(ctx);
 465
 466     return ret;
 467 }
 468
 469 int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 470                                 size_t len, size_t *secret_size)
 471 {
 472     static const unsigned char *salt[3] = {
 473 #ifndef CHARSET_EBCDIC
 474         (const unsigned char *)"A",
 475         (const unsigned char *)"BB",
 476         (const unsigned char *)"CCC",
 477 #else
 478         (const unsigned char *)"\x41",
 479         (const unsigned char *)"\x42\x42",
 480         (const unsigned char *)"\x43\x43\x43",
 481 #endif
 482     };
 483     unsigned char buf[EVP_MAX_MD_SIZE];
 484     EVP_MD_CTX *ctx = EVP_MD_CTX_new();
 485     int i, ret = 1;
 486     unsigned int n;
 487     size_t ret_secret_size = 0;
 488
 489     if (ctx == NULL) {
 490         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_MASTER_SECRET,
 491                  ERR_R_MALLOC_FAILURE);
 492         return 0;
 493     }
 494     for (i = 0; i < 3; i++) {
 495         if (EVP_DigestInit_ex(ctx, s->ctx->sha1, NULL) <= 0
 496             || EVP_DigestUpdate(ctx, salt[i],
 497                                 strlen((const char *)salt[i])) <= 0
 498             || EVP_DigestUpdate(ctx, p, len) <= 0
 499             || EVP_DigestUpdate(ctx, &(s->s3->client_random[0]),
 500                                 SSL3_RANDOM_SIZE) <= 0
 501             || EVP_DigestUpdate(ctx, &(s->s3->server_random[0]),
 502                                 SSL3_RANDOM_SIZE) <= 0
 503                /* TODO(size_t) : convert me */
 504             || EVP_DigestFinal_ex(ctx, buf, &n) <= 0
 505             || EVP_DigestInit_ex(ctx, s->ctx->md5, NULL) <= 0
 506             || EVP_DigestUpdate(ctx, p, len) <= 0
 507             || EVP_DigestUpdate(ctx, buf, n) <= 0
 508             || EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
 509             SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 510                      SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR);
 511             ret = 0;
 512             break;
 513         }
 514         out += n;
 515         ret_secret_size += n;
 516     }
 517     EVP_MD_CTX_free(ctx);
 518
 519     OPENSSL_cleanse(buf, sizeof(buf));
 520     if (ret)
 521         *secret_size = ret_secret_size;
 522     return ret;
 523 }
 524
 525 int ssl3_alert_code(int code)
 526 {
 527     switch (code) {
 528     case SSL_AD_CLOSE_NOTIFY:
 529         return SSL3_AD_CLOSE_NOTIFY;
 530     case SSL_AD_UNEXPECTED_MESSAGE:
 531         return SSL3_AD_UNEXPECTED_MESSAGE;
 532     case SSL_AD_BAD_RECORD_MAC:
 533         return SSL3_AD_BAD_RECORD_MAC;
 534     case SSL_AD_DECRYPTION_FAILED:
 535         return SSL3_AD_BAD_RECORD_MAC;
 536     case SSL_AD_RECORD_OVERFLOW:
 537         return SSL3_AD_BAD_RECORD_MAC;
 538     case SSL_AD_DECOMPRESSION_FAILURE:
 539         return SSL3_AD_DECOMPRESSION_FAILURE;
 540     case SSL_AD_HANDSHAKE_FAILURE:
 541         return SSL3_AD_HANDSHAKE_FAILURE;
 542     case SSL_AD_NO_CERTIFICATE:
 543         return SSL3_AD_NO_CERTIFICATE;
 544     case SSL_AD_BAD_CERTIFICATE:
 545         return SSL3_AD_BAD_CERTIFICATE;
 546     case SSL_AD_UNSUPPORTED_CERTIFICATE:
 547         return SSL3_AD_UNSUPPORTED_CERTIFICATE;
 548     case SSL_AD_CERTIFICATE_REVOKED:
 549         return SSL3_AD_CERTIFICATE_REVOKED;
 550     case SSL_AD_CERTIFICATE_EXPIRED:
 551         return SSL3_AD_CERTIFICATE_EXPIRED;
 552     case SSL_AD_CERTIFICATE_UNKNOWN:
 553         return SSL3_AD_CERTIFICATE_UNKNOWN;
 554     case SSL_AD_ILLEGAL_PARAMETER:
 555         return SSL3_AD_ILLEGAL_PARAMETER;
 556     case SSL_AD_UNKNOWN_CA:
 557         return SSL3_AD_BAD_CERTIFICATE;
 558     case SSL_AD_ACCESS_DENIED:
 559         return SSL3_AD_HANDSHAKE_FAILURE;
 560     case SSL_AD_DECODE_ERROR:
 561         return SSL3_AD_HANDSHAKE_FAILURE;
 562     case SSL_AD_DECRYPT_ERROR:
 563         return SSL3_AD_HANDSHAKE_FAILURE;
 564     case SSL_AD_EXPORT_RESTRICTION:
 565         return SSL3_AD_HANDSHAKE_FAILURE;
 566     case SSL_AD_PROTOCOL_VERSION:
 567         return SSL3_AD_HANDSHAKE_FAILURE;
 568     case SSL_AD_INSUFFICIENT_SECURITY:
 569         return SSL3_AD_HANDSHAKE_FAILURE;
 570     case SSL_AD_INTERNAL_ERROR:
 571         return SSL3_AD_HANDSHAKE_FAILURE;
 572     case SSL_AD_USER_CANCELLED:
 573         return SSL3_AD_HANDSHAKE_FAILURE;
 574     case SSL_AD_NO_RENEGOTIATION:
 575         return -1;            /* Don't send it :-) */
 576     case SSL_AD_UNSUPPORTED_EXTENSION:
 577         return SSL3_AD_HANDSHAKE_FAILURE;
 578     case SSL_AD_CERTIFICATE_UNOBTAINABLE:
 579         return SSL3_AD_HANDSHAKE_FAILURE;
 580     case SSL_AD_UNRECOGNIZED_NAME:
 581         return SSL3_AD_HANDSHAKE_FAILURE;
 582     case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
 583         return SSL3_AD_HANDSHAKE_FAILURE;
 584     case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
 585         return SSL3_AD_HANDSHAKE_FAILURE;
 586     case SSL_AD_UNKNOWN_PSK_IDENTITY:
 587         return TLS1_AD_UNKNOWN_PSK_IDENTITY;
 588     case SSL_AD_INAPPROPRIATE_FALLBACK:
 589         return TLS1_AD_INAPPROPRIATE_FALLBACK;
 590     case SSL_AD_NO_APPLICATION_PROTOCOL:
 591         return TLS1_AD_NO_APPLICATION_PROTOCOL;
 592     case SSL_AD_CERTIFICATE_REQUIRED:
 593         return SSL_AD_HANDSHAKE_FAILURE;
 594     default:
 595         return -1;
 596     }
 597 }