ssl/s3_enc.c

   1 /*
   2  * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
   3  * Copyright 2005 Nokia. All rights reserved.
   4  *
   5  * Licensed under the Apache License 2.0 (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_local.h"
  13 #include <openssl/evp.h>
  14 #include <openssl/md5.h>
  15 #include <openssl/core_names.h>
  16 #include "internal/cryptlib.h"
  17
  18 static int ssl3_generate_key_block(SSL *s, unsigned char *km, int num)
  19 {
  20     const EVP_MD *md5 = NULL, *sha1 = NULL;
  21     EVP_MD_CTX *m5;
  22     EVP_MD_CTX *s1;
  23     unsigned char buf[16], smd[SHA_DIGEST_LENGTH];
  24     unsigned char c = 'A';
  25     unsigned int i, j, k;
  26     int ret = 0;
  27
  28 #ifdef CHARSET_EBCDIC
  29     c = os_toascii[c];          /* 'A' in ASCII */
  30 #endif
  31     k = 0;
  32     md5 = ssl_evp_md_fetch(s->ctx->libctx, NID_md5, s->ctx->propq);
  33     sha1 = ssl_evp_md_fetch(s->ctx->libctx, NID_sha1, s->ctx->propq);
  34     m5 = EVP_MD_CTX_new();
  35     s1 = EVP_MD_CTX_new();
  36     if (md5 == NULL || sha1 == NULL || m5 == NULL || s1 == NULL) {
  37         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
  38                  ERR_R_MALLOC_FAILURE);
  39         goto err;
  40     }
  41     for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
  42         k++;
  43         if (k > sizeof(buf)) {
  44             /* bug: 'buf' is too small for this ciphersuite */
  45             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
  46                      ERR_R_INTERNAL_ERROR);
  47             goto err;
  48         }
  49
  50         for (j = 0; j < k; j++)
  51             buf[j] = c;
  52         c++;
  53         if (!EVP_DigestInit_ex(s1, sha1, NULL)
  54             || !EVP_DigestUpdate(s1, buf, k)
  55             || !EVP_DigestUpdate(s1, s->session->master_key,
  56                                  s->session->master_key_length)
  57             || !EVP_DigestUpdate(s1, s->s3.server_random, SSL3_RANDOM_SIZE)
  58             || !EVP_DigestUpdate(s1, s->s3.client_random, SSL3_RANDOM_SIZE)
  59             || !EVP_DigestFinal_ex(s1, smd, NULL)
  60             || !EVP_DigestInit_ex(m5, md5, NULL)
  61             || !EVP_DigestUpdate(m5, s->session->master_key,
  62                                  s->session->master_key_length)
  63             || !EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH)) {
  64             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
  65                      ERR_R_INTERNAL_ERROR);
  66             goto err;
  67         }
  68         if ((int)(i + MD5_DIGEST_LENGTH) > num) {
  69             if (!EVP_DigestFinal_ex(m5, smd, NULL)) {
  70                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
  71                          SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
  72                 goto err;
  73             }
  74             memcpy(km, smd, (num - i));
  75         } else {
  76             if (!EVP_DigestFinal_ex(m5, km, NULL)) {
  77                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
  78                          SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
  79                 goto err;
  80             }
  81         }
  82
  83         km += MD5_DIGEST_LENGTH;
  84     }
  85     OPENSSL_cleanse(smd, sizeof(smd));
  86     ret = 1;
  87  err:
  88     EVP_MD_CTX_free(m5);
  89     EVP_MD_CTX_free(s1);
  90     ssl_evp_md_free(md5);
  91     ssl_evp_md_free(sha1);
  92     return ret;
  93 }
  94
  95 int ssl3_change_cipher_state(SSL *s, int which)
  96 {
  97     unsigned char *p, *mac_secret;
  98     unsigned char *ms, *key, *iv;
  99     EVP_CIPHER_CTX *dd;
 100     const EVP_CIPHER *c;
 101 #ifndef OPENSSL_NO_COMP
 102     COMP_METHOD *comp;
 103 #endif
 104     const EVP_MD *m;
 105     int mdi;
 106     size_t n, i, j, k, cl;
 107     int reuse_dd = 0;
 108
 109     c = s->s3.tmp.new_sym_enc;
 110     m = s->s3.tmp.new_hash;
 111     /* m == NULL will lead to a crash later */
 112     if (!ossl_assert(m != NULL)) {
 113         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 114                  ERR_R_INTERNAL_ERROR);
 115         goto err;
 116     }
 117 #ifndef OPENSSL_NO_COMP
 118     if (s->s3.tmp.new_compression == NULL)
 119         comp = NULL;
 120     else
 121         comp = s->s3.tmp.new_compression->method;
 122 #endif
 123
 124     if (which & SSL3_CC_READ) {
 125         if (s->enc_read_ctx != NULL) {
 126             reuse_dd = 1;
 127         } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
 128             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 129                      ERR_R_MALLOC_FAILURE);
 130             goto err;
 131         } else {
 132             /*
 133              * make sure it's initialised in case we exit later with an error
 134              */
 135             EVP_CIPHER_CTX_reset(s->enc_read_ctx);
 136         }
 137         dd = s->enc_read_ctx;
 138
 139         if (ssl_replace_hash(&s->read_hash, m) == NULL) {
 140             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 141                      ERR_R_INTERNAL_ERROR);
 142             goto err;
 143         }
 144 #ifndef OPENSSL_NO_COMP
 145         /* COMPRESS */
 146         COMP_CTX_free(s->expand);
 147         s->expand = NULL;
 148         if (comp != NULL) {
 149             s->expand = COMP_CTX_new(comp);
 150             if (s->expand == NULL) {
 151                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 152                          SSL_F_SSL3_CHANGE_CIPHER_STATE,
 153                          SSL_R_COMPRESSION_LIBRARY_ERROR);
 154                 goto err;
 155             }
 156         }
 157 #endif
 158         RECORD_LAYER_reset_read_sequence(&s->rlayer);
 159         mac_secret = &(s->s3.read_mac_secret[0]);
 160     } else {
 161         s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
 162         if (s->enc_write_ctx != NULL) {
 163             reuse_dd = 1;
 164         } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
 165             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 166                      ERR_R_MALLOC_FAILURE);
 167             goto err;
 168         } else {
 169             /*
 170              * make sure it's initialised in case we exit later with an error
 171              */
 172             EVP_CIPHER_CTX_reset(s->enc_write_ctx);
 173         }
 174         dd = s->enc_write_ctx;
 175         if (ssl_replace_hash(&s->write_hash, m) == NULL) {
 176             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 177                      ERR_R_MALLOC_FAILURE);
 178             goto err;
 179         }
 180 #ifndef OPENSSL_NO_COMP
 181         /* COMPRESS */
 182         COMP_CTX_free(s->compress);
 183         s->compress = NULL;
 184         if (comp != NULL) {
 185             s->compress = COMP_CTX_new(comp);
 186             if (s->compress == NULL) {
 187                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 188                          SSL_F_SSL3_CHANGE_CIPHER_STATE,
 189                          SSL_R_COMPRESSION_LIBRARY_ERROR);
 190                 goto err;
 191             }
 192         }
 193 #endif
 194         RECORD_LAYER_reset_write_sequence(&s->rlayer);
 195         mac_secret = &(s->s3.write_mac_secret[0]);
 196     }
 197
 198     if (reuse_dd)
 199         EVP_CIPHER_CTX_reset(dd);
 200
 201     p = s->s3.tmp.key_block;
 202     mdi = EVP_MD_size(m);
 203     if (mdi < 0) {
 204         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 205                  ERR_R_INTERNAL_ERROR);
 206         goto err;
 207     }
 208     i = mdi;
 209     cl = EVP_CIPHER_key_length(c);
 210     j = cl;
 211     k = EVP_CIPHER_iv_length(c);
 212     if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 213         (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
 214         ms = &(p[0]);
 215         n = i + i;
 216         key = &(p[n]);
 217         n += j + j;
 218         iv = &(p[n]);
 219         n += k + k;
 220     } else {
 221         n = i;
 222         ms = &(p[n]);
 223         n += i + j;
 224         key = &(p[n]);
 225         n += j + k;
 226         iv = &(p[n]);
 227         n += k;
 228     }
 229
 230     if (n > s->s3.tmp.key_block_length) {
 231         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 232                  ERR_R_INTERNAL_ERROR);
 233         goto err;
 234     }
 235
 236     memcpy(mac_secret, ms, i);
 237
 238     if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
 239         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 240                  ERR_R_INTERNAL_ERROR);
 241         goto err;
 242     }
 243
 244     s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
 245     return 1;
 246  err:
 247     return 0;
 248 }
 249
 250 int ssl3_setup_key_block(SSL *s)
 251 {
 252     unsigned char *p;
 253     const EVP_CIPHER *c;
 254     const EVP_MD *hash;
 255     int num;
 256     int ret = 0;
 257     SSL_COMP *comp;
 258
 259     if (s->s3.tmp.key_block_length != 0)
 260         return 1;
 261
 262     if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, NULL, NULL, &comp,
 263                             0)) {
 264         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_SETUP_KEY_BLOCK,
 265                  SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
 266         return 0;
 267     }
 268
 269     ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
 270     s->s3.tmp.new_sym_enc = c;
 271     ssl_evp_md_free(s->s3.tmp.new_hash);
 272     s->s3.tmp.new_hash = hash;
 273 #ifdef OPENSSL_NO_COMP
 274     s->s3.tmp.new_compression = NULL;
 275 #else
 276     s->s3.tmp.new_compression = comp;
 277 #endif
 278
 279     num = EVP_MD_size(hash);
 280     if (num < 0)
 281         return 0;
 282
 283     num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c);
 284     num *= 2;
 285
 286     ssl3_cleanup_key_block(s);
 287
 288     if ((p = OPENSSL_malloc(num)) == NULL) {
 289         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_SETUP_KEY_BLOCK,
 290                  ERR_R_MALLOC_FAILURE);
 291         return 0;
 292     }
 293
 294     s->s3.tmp.key_block_length = num;
 295     s->s3.tmp.key_block = p;
 296
 297     /* Calls SSLfatal() as required */
 298     ret = ssl3_generate_key_block(s, p, num);
 299
 300     if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) {
 301         /*
 302          * enable vulnerability countermeasure for CBC ciphers with known-IV
 303          * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 304          */
 305         s->s3.need_empty_fragments = 1;
 306
 307         if (s->session->cipher != NULL) {
 308             if (s->session->cipher->algorithm_enc == SSL_eNULL)
 309                 s->s3.need_empty_fragments = 0;
 310
 311 #ifndef OPENSSL_NO_RC4
 312             if (s->session->cipher->algorithm_enc == SSL_RC4)
 313                 s->s3.need_empty_fragments = 0;
 314 #endif
 315         }
 316     }
 317
 318     return ret;
 319 }
 320
 321 void ssl3_cleanup_key_block(SSL *s)
 322 {
 323     OPENSSL_clear_free(s->s3.tmp.key_block, s->s3.tmp.key_block_length);
 324     s->s3.tmp.key_block = NULL;
 325     s->s3.tmp.key_block_length = 0;
 326 }
 327
 328 int ssl3_init_finished_mac(SSL *s)
 329 {
 330     BIO *buf = BIO_new(BIO_s_mem());
 331
 332     if (buf == NULL) {
 333         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_INIT_FINISHED_MAC,
 334                  ERR_R_MALLOC_FAILURE);
 335         return 0;
 336     }
 337     ssl3_free_digest_list(s);
 338     s->s3.handshake_buffer = buf;
 339     (void)BIO_set_close(s->s3.handshake_buffer, BIO_CLOSE);
 340     return 1;
 341 }
 342
 343 /*
 344  * Free digest list. Also frees handshake buffer since they are always freed
 345  * together.
 346  */
 347
 348 void ssl3_free_digest_list(SSL *s)
 349 {
 350     BIO_free(s->s3.handshake_buffer);
 351     s->s3.handshake_buffer = NULL;
 352     EVP_MD_CTX_free(s->s3.handshake_dgst);
 353     s->s3.handshake_dgst = NULL;
 354 }
 355
 356 int ssl3_finish_mac(SSL *s, const unsigned char *buf, size_t len)
 357 {
 358     int ret;
 359
 360     if (s->s3.handshake_dgst == NULL) {
 361         /* Note: this writes to a memory BIO so a failure is a fatal error */
 362         if (len > INT_MAX) {
 363             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
 364                      SSL_R_OVERFLOW_ERROR);
 365             return 0;
 366         }
 367         ret = BIO_write(s->s3.handshake_buffer, (void *)buf, (int)len);
 368         if (ret <= 0 || ret != (int)len) {
 369             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
 370                      ERR_R_INTERNAL_ERROR);
 371             return 0;
 372         }
 373     } else {
 374         ret = EVP_DigestUpdate(s->s3.handshake_dgst, buf, len);
 375         if (!ret) {
 376             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
 377                      ERR_R_INTERNAL_ERROR);
 378             return 0;
 379         }
 380     }
 381     return 1;
 382 }
 383
 384 int ssl3_digest_cached_records(SSL *s, int keep)
 385 {
 386     const EVP_MD *md;
 387     long hdatalen;
 388     void *hdata;
 389
 390     if (s->s3.handshake_dgst == NULL) {
 391         hdatalen = BIO_get_mem_data(s->s3.handshake_buffer, &hdata);
 392         if (hdatalen <= 0) {
 393             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 394                      SSL_R_BAD_HANDSHAKE_LENGTH);
 395             return 0;
 396         }
 397
 398         s->s3.handshake_dgst = EVP_MD_CTX_new();
 399         if (s->s3.handshake_dgst == NULL) {
 400             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 401                      ERR_R_MALLOC_FAILURE);
 402             return 0;
 403         }
 404
 405         md = ssl_handshake_md(s);
 406         if (md == NULL || !EVP_DigestInit_ex(s->s3.handshake_dgst, md, NULL)
 407             || !EVP_DigestUpdate(s->s3.handshake_dgst, hdata, hdatalen)) {
 408             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 409                      ERR_R_INTERNAL_ERROR);
 410             return 0;
 411         }
 412     }
 413     if (keep == 0) {
 414         BIO_free(s->s3.handshake_buffer);
 415         s->s3.handshake_buffer = NULL;
 416     }
 417
 418     return 1;
 419 }
 420
 421 void ssl3_digest_master_key_set_params(const SSL_SESSION *session,
 422                                        OSSL_PARAM params[])
 423 {
 424     int n = 0;
 425     params[n++] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
 426                                                     (void *)session->master_key,
 427                                                     session->master_key_length);
 428     params[n++] = OSSL_PARAM_construct_end();
 429 }
 430
 431 size_t ssl3_final_finish_mac(SSL *s, const char *sender, size_t len,
 432                              unsigned char *p)
 433 {
 434     int ret;
 435     EVP_MD_CTX *ctx = NULL;
 436
 437     if (!ssl3_digest_cached_records(s, 0)) {
 438         /* SSLfatal() already called */
 439         return 0;
 440     }
 441
 442     if (EVP_MD_CTX_type(s->s3.handshake_dgst) != NID_md5_sha1) {
 443         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 444                  SSL_R_NO_REQUIRED_DIGEST);
 445         return 0;
 446     }
 447
 448     ctx = EVP_MD_CTX_new();
 449     if (ctx == NULL) {
 450         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 451                  ERR_R_MALLOC_FAILURE);
 452         return 0;
 453     }
 454     if (!EVP_MD_CTX_copy_ex(ctx, s->s3.handshake_dgst)) {
 455         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 456                  ERR_R_INTERNAL_ERROR);
 457         ret = 0;
 458         goto err;
 459     }
 460
 461     ret = EVP_MD_CTX_size(ctx);
 462     if (ret < 0) {
 463         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 464                  ERR_R_INTERNAL_ERROR);
 465         ret = 0;
 466         goto err;
 467     }
 468
 469     if (sender != NULL) {
 470         OSSL_PARAM digest_cmd_params[3];
 471
 472         ssl3_digest_master_key_set_params(s->session, digest_cmd_params);
 473
 474         if (EVP_DigestUpdate(ctx, sender, len) <= 0
 475             || EVP_MD_CTX_set_params(ctx, digest_cmd_params) <= 0
 476             || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
 477                 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 478                          ERR_R_INTERNAL_ERROR);
 479                 ret = 0;
 480         }
 481     }
 482
 483  err:
 484     EVP_MD_CTX_free(ctx);
 485
 486     return ret;
 487 }
 488
 489 int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 490                                 size_t len, size_t *secret_size)
 491 {
 492     static const unsigned char *salt[3] = {
 493 #ifndef CHARSET_EBCDIC
 494         (const unsigned char *)"A",
 495         (const unsigned char *)"BB",
 496         (const unsigned char *)"CCC",
 497 #else
 498         (const unsigned char *)"\x41",
 499         (const unsigned char *)"\x42\x42",
 500         (const unsigned char *)"\x43\x43\x43",
 501 #endif
 502     };
 503     unsigned char buf[EVP_MAX_MD_SIZE];
 504     EVP_MD_CTX *ctx = EVP_MD_CTX_new();
 505     int i, ret = 1;
 506     unsigned int n;
 507     size_t ret_secret_size = 0;
 508
 509     if (ctx == NULL) {
 510         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_MASTER_SECRET,
 511                  ERR_R_MALLOC_FAILURE);
 512         return 0;
 513     }
 514     for (i = 0; i < 3; i++) {
 515         if (EVP_DigestInit_ex(ctx, s->ctx->sha1, NULL) <= 0
 516             || EVP_DigestUpdate(ctx, salt[i],
 517                                 strlen((const char *)salt[i])) <= 0
 518             || EVP_DigestUpdate(ctx, p, len) <= 0
 519             || EVP_DigestUpdate(ctx, &(s->s3.client_random[0]),
 520                                 SSL3_RANDOM_SIZE) <= 0
 521             || EVP_DigestUpdate(ctx, &(s->s3.server_random[0]),
 522                                 SSL3_RANDOM_SIZE) <= 0
 523                /* TODO(size_t) : convert me */
 524             || EVP_DigestFinal_ex(ctx, buf, &n) <= 0
 525             || EVP_DigestInit_ex(ctx, s->ctx->md5, NULL) <= 0
 526             || EVP_DigestUpdate(ctx, p, len) <= 0
 527             || EVP_DigestUpdate(ctx, buf, n) <= 0
 528             || EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
 529             SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 530                      SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR);
 531             ret = 0;
 532             break;
 533         }
 534         out += n;
 535         ret_secret_size += n;
 536     }
 537     EVP_MD_CTX_free(ctx);
 538
 539     OPENSSL_cleanse(buf, sizeof(buf));
 540     if (ret)
 541         *secret_size = ret_secret_size;
 542     return ret;
 543 }
 544
 545 int ssl3_alert_code(int code)
 546 {
 547     switch (code) {
 548     case SSL_AD_CLOSE_NOTIFY:
 549         return SSL3_AD_CLOSE_NOTIFY;
 550     case SSL_AD_UNEXPECTED_MESSAGE:
 551         return SSL3_AD_UNEXPECTED_MESSAGE;
 552     case SSL_AD_BAD_RECORD_MAC:
 553         return SSL3_AD_BAD_RECORD_MAC;
 554     case SSL_AD_DECRYPTION_FAILED:
 555         return SSL3_AD_BAD_RECORD_MAC;
 556     case SSL_AD_RECORD_OVERFLOW:
 557         return SSL3_AD_BAD_RECORD_MAC;
 558     case SSL_AD_DECOMPRESSION_FAILURE:
 559         return SSL3_AD_DECOMPRESSION_FAILURE;
 560     case SSL_AD_HANDSHAKE_FAILURE:
 561         return SSL3_AD_HANDSHAKE_FAILURE;
 562     case SSL_AD_NO_CERTIFICATE:
 563         return SSL3_AD_NO_CERTIFICATE;
 564     case SSL_AD_BAD_CERTIFICATE:
 565         return SSL3_AD_BAD_CERTIFICATE;
 566     case SSL_AD_UNSUPPORTED_CERTIFICATE:
 567         return SSL3_AD_UNSUPPORTED_CERTIFICATE;
 568     case SSL_AD_CERTIFICATE_REVOKED:
 569         return SSL3_AD_CERTIFICATE_REVOKED;
 570     case SSL_AD_CERTIFICATE_EXPIRED:
 571         return SSL3_AD_CERTIFICATE_EXPIRED;
 572     case SSL_AD_CERTIFICATE_UNKNOWN:
 573         return SSL3_AD_CERTIFICATE_UNKNOWN;
 574     case SSL_AD_ILLEGAL_PARAMETER:
 575         return SSL3_AD_ILLEGAL_PARAMETER;
 576     case SSL_AD_UNKNOWN_CA:
 577         return SSL3_AD_BAD_CERTIFICATE;
 578     case SSL_AD_ACCESS_DENIED:
 579         return SSL3_AD_HANDSHAKE_FAILURE;
 580     case SSL_AD_DECODE_ERROR:
 581         return SSL3_AD_HANDSHAKE_FAILURE;
 582     case SSL_AD_DECRYPT_ERROR:
 583         return SSL3_AD_HANDSHAKE_FAILURE;
 584     case SSL_AD_EXPORT_RESTRICTION:
 585         return SSL3_AD_HANDSHAKE_FAILURE;
 586     case SSL_AD_PROTOCOL_VERSION:
 587         return SSL3_AD_HANDSHAKE_FAILURE;
 588     case SSL_AD_INSUFFICIENT_SECURITY:
 589         return SSL3_AD_HANDSHAKE_FAILURE;
 590     case SSL_AD_INTERNAL_ERROR:
 591         return SSL3_AD_HANDSHAKE_FAILURE;
 592     case SSL_AD_USER_CANCELLED:
 593         return SSL3_AD_HANDSHAKE_FAILURE;
 594     case SSL_AD_NO_RENEGOTIATION:
 595         return -1;            /* Don't send it :-) */
 596     case SSL_AD_UNSUPPORTED_EXTENSION:
 597         return SSL3_AD_HANDSHAKE_FAILURE;
 598     case SSL_AD_CERTIFICATE_UNOBTAINABLE:
 599         return SSL3_AD_HANDSHAKE_FAILURE;
 600     case SSL_AD_UNRECOGNIZED_NAME:
 601         return SSL3_AD_HANDSHAKE_FAILURE;
 602     case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
 603         return SSL3_AD_HANDSHAKE_FAILURE;
 604     case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
 605         return SSL3_AD_HANDSHAKE_FAILURE;
 606     case SSL_AD_UNKNOWN_PSK_IDENTITY:
 607         return TLS1_AD_UNKNOWN_PSK_IDENTITY;
 608     case SSL_AD_INAPPROPRIATE_FALLBACK:
 609         return TLS1_AD_INAPPROPRIATE_FALLBACK;
 610     case SSL_AD_NO_APPLICATION_PROTOCOL:
 611         return TLS1_AD_NO_APPLICATION_PROTOCOL;
 612     case SSL_AD_CERTIFICATE_REQUIRED:
 613         return SSL_AD_HANDSHAKE_FAILURE;
 614     default:
 615         return -1;
 616     }
 617 }