ssl/s3_enc.c

   1 /*
   2  * Copyright 1995-2018 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     EVP_MD *md5;
  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 = EVP_MD_fetch(NULL, OSSL_DIGEST_NAME_MD5, "-fips");
  33     m5 = EVP_MD_CTX_new();
  34     s1 = EVP_MD_CTX_new();
  35     if (md5 == NULL || m5 == NULL || s1 == NULL) {
  36         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
  37                  ERR_R_MALLOC_FAILURE);
  38         goto err;
  39     }
  40     for (i = 0; (int)i < num; i += MD5_DIGEST_LENGTH) {
  41         k++;
  42         if (k > sizeof(buf)) {
  43             /* bug: 'buf' is too small for this ciphersuite */
  44             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
  45                      ERR_R_INTERNAL_ERROR);
  46             goto err;
  47         }
  48
  49         for (j = 0; j < k; j++)
  50             buf[j] = c;
  51         c++;
  52         if (!EVP_DigestInit_ex(s1, EVP_sha1(), NULL)
  53             || !EVP_DigestUpdate(s1, buf, k)
  54             || !EVP_DigestUpdate(s1, s->session->master_key,
  55                                  s->session->master_key_length)
  56             || !EVP_DigestUpdate(s1, s->s3.server_random, SSL3_RANDOM_SIZE)
  57             || !EVP_DigestUpdate(s1, s->s3.client_random, SSL3_RANDOM_SIZE)
  58             || !EVP_DigestFinal_ex(s1, smd, NULL)
  59             || !EVP_DigestInit_ex(m5, md5, NULL)
  60             || !EVP_DigestUpdate(m5, s->session->master_key,
  61                                  s->session->master_key_length)
  62             || !EVP_DigestUpdate(m5, smd, SHA_DIGEST_LENGTH)) {
  63             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_KEY_BLOCK,
  64                      ERR_R_INTERNAL_ERROR);
  65             goto err;
  66         }
  67         if ((int)(i + MD5_DIGEST_LENGTH) > num) {
  68             if (!EVP_DigestFinal_ex(m5, smd, NULL)) {
  69                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
  70                          SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
  71                 goto err;
  72             }
  73             memcpy(km, smd, (num - i));
  74         } else {
  75             if (!EVP_DigestFinal_ex(m5, km, NULL)) {
  76                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
  77                          SSL_F_SSL3_GENERATE_KEY_BLOCK, ERR_R_INTERNAL_ERROR);
  78                 goto err;
  79             }
  80         }
  81
  82         km += MD5_DIGEST_LENGTH;
  83     }
  84     OPENSSL_cleanse(smd, sizeof(smd));
  85     ret = 1;
  86  err:
  87     EVP_MD_CTX_free(m5);
  88     EVP_MD_CTX_free(s1);
  89     ssl_evp_md_free(md5);
  90     return ret;
  91 }
  92
  93 int ssl3_change_cipher_state(SSL *s, int which)
  94 {
  95     unsigned char *p, *mac_secret;
  96     unsigned char *ms, *key, *iv;
  97     EVP_CIPHER_CTX *dd;
  98     const EVP_CIPHER *c;
  99 #ifndef OPENSSL_NO_COMP
 100     COMP_METHOD *comp;
 101 #endif
 102     const EVP_MD *m;
 103     int mdi;
 104     size_t n, i, j, k, cl;
 105     int reuse_dd = 0;
 106
 107     c = s->s3.tmp.new_sym_enc;
 108     m = s->s3.tmp.new_hash;
 109     /* m == NULL will lead to a crash later */
 110     if (!ossl_assert(m != NULL)) {
 111         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 112                  ERR_R_INTERNAL_ERROR);
 113         goto err;
 114     }
 115 #ifndef OPENSSL_NO_COMP
 116     if (s->s3.tmp.new_compression == NULL)
 117         comp = NULL;
 118     else
 119         comp = s->s3.tmp.new_compression->method;
 120 #endif
 121
 122     if (which & SSL3_CC_READ) {
 123         if (s->enc_read_ctx != NULL) {
 124             reuse_dd = 1;
 125         } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
 126             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 127                      ERR_R_MALLOC_FAILURE);
 128             goto err;
 129         } else {
 130             /*
 131              * make sure it's initialised in case we exit later with an error
 132              */
 133             EVP_CIPHER_CTX_reset(s->enc_read_ctx);
 134         }
 135         dd = s->enc_read_ctx;
 136
 137         if (ssl_replace_hash(&s->read_hash, m) == NULL) {
 138             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 139                      ERR_R_INTERNAL_ERROR);
 140             goto err;
 141         }
 142 #ifndef OPENSSL_NO_COMP
 143         /* COMPRESS */
 144         COMP_CTX_free(s->expand);
 145         s->expand = NULL;
 146         if (comp != NULL) {
 147             s->expand = COMP_CTX_new(comp);
 148             if (s->expand == NULL) {
 149                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 150                          SSL_F_SSL3_CHANGE_CIPHER_STATE,
 151                          SSL_R_COMPRESSION_LIBRARY_ERROR);
 152                 goto err;
 153             }
 154         }
 155 #endif
 156         RECORD_LAYER_reset_read_sequence(&s->rlayer);
 157         mac_secret = &(s->s3.read_mac_secret[0]);
 158     } else {
 159         s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
 160         if (s->enc_write_ctx != NULL) {
 161             reuse_dd = 1;
 162         } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
 163             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 164                      ERR_R_MALLOC_FAILURE);
 165             goto err;
 166         } else {
 167             /*
 168              * make sure it's initialised in case we exit later with an error
 169              */
 170             EVP_CIPHER_CTX_reset(s->enc_write_ctx);
 171         }
 172         dd = s->enc_write_ctx;
 173         if (ssl_replace_hash(&s->write_hash, m) == NULL) {
 174             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 175                      ERR_R_MALLOC_FAILURE);
 176             goto err;
 177         }
 178 #ifndef OPENSSL_NO_COMP
 179         /* COMPRESS */
 180         COMP_CTX_free(s->compress);
 181         s->compress = NULL;
 182         if (comp != NULL) {
 183             s->compress = COMP_CTX_new(comp);
 184             if (s->compress == NULL) {
 185                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 186                          SSL_F_SSL3_CHANGE_CIPHER_STATE,
 187                          SSL_R_COMPRESSION_LIBRARY_ERROR);
 188                 goto err;
 189             }
 190         }
 191 #endif
 192         RECORD_LAYER_reset_write_sequence(&s->rlayer);
 193         mac_secret = &(s->s3.write_mac_secret[0]);
 194     }
 195
 196     if (reuse_dd)
 197         EVP_CIPHER_CTX_reset(dd);
 198
 199     p = s->s3.tmp.key_block;
 200     mdi = EVP_MD_size(m);
 201     if (mdi < 0) {
 202         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 203                  ERR_R_INTERNAL_ERROR);
 204         goto err;
 205     }
 206     i = mdi;
 207     cl = EVP_CIPHER_key_length(c);
 208     j = cl;
 209     k = EVP_CIPHER_iv_length(c);
 210     if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 211         (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
 212         ms = &(p[0]);
 213         n = i + i;
 214         key = &(p[n]);
 215         n += j + j;
 216         iv = &(p[n]);
 217         n += k + k;
 218     } else {
 219         n = i;
 220         ms = &(p[n]);
 221         n += i + j;
 222         key = &(p[n]);
 223         n += j + k;
 224         iv = &(p[n]);
 225         n += k;
 226     }
 227
 228     if (n > s->s3.tmp.key_block_length) {
 229         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 230                  ERR_R_INTERNAL_ERROR);
 231         goto err;
 232     }
 233
 234     memcpy(mac_secret, ms, i);
 235
 236     if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
 237         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 238                  ERR_R_INTERNAL_ERROR);
 239         goto err;
 240     }
 241
 242     s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
 243     return 1;
 244  err:
 245     return 0;
 246 }
 247
 248 int ssl3_setup_key_block(SSL *s)
 249 {
 250     unsigned char *p;
 251     const EVP_CIPHER *c;
 252     const EVP_MD *hash;
 253     int num;
 254     int ret = 0;
 255     SSL_COMP *comp;
 256
 257     if (s->s3.tmp.key_block_length != 0)
 258         return 1;
 259
 260     if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, NULL, NULL, &comp,
 261                             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     ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
 268     s->s3.tmp.new_sym_enc = c;
 269     ssl_evp_md_free(s->s3.tmp.new_hash);
 270     s->s3.tmp.new_hash = hash;
 271 #ifdef OPENSSL_NO_COMP
 272     s->s3.tmp.new_compression = NULL;
 273 #else
 274     s->s3.tmp.new_compression = comp;
 275 #endif
 276
 277     num = EVP_MD_size(hash);
 278     if (num < 0)
 279         return 0;
 280
 281     num = EVP_CIPHER_key_length(c) + num + EVP_CIPHER_iv_length(c);
 282     num *= 2;
 283
 284     ssl3_cleanup_key_block(s);
 285
 286     if ((p = OPENSSL_malloc(num)) == NULL) {
 287         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_SETUP_KEY_BLOCK,
 288                  ERR_R_MALLOC_FAILURE);
 289         return 0;
 290     }
 291
 292     s->s3.tmp.key_block_length = num;
 293     s->s3.tmp.key_block = p;
 294
 295     /* Calls SSLfatal() as required */
 296     ret = ssl3_generate_key_block(s, p, num);
 297
 298     if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) {
 299         /*
 300          * enable vulnerability countermeasure for CBC ciphers with known-IV
 301          * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
 302          */
 303         s->s3.need_empty_fragments = 1;
 304
 305         if (s->session->cipher != NULL) {
 306             if (s->session->cipher->algorithm_enc == SSL_eNULL)
 307                 s->s3.need_empty_fragments = 0;
 308
 309 #ifndef OPENSSL_NO_RC4
 310             if (s->session->cipher->algorithm_enc == SSL_RC4)
 311                 s->s3.need_empty_fragments = 0;
 312 #endif
 313         }
 314     }
 315
 316     return ret;
 317 }
 318
 319 void ssl3_cleanup_key_block(SSL *s)
 320 {
 321     OPENSSL_clear_free(s->s3.tmp.key_block, s->s3.tmp.key_block_length);
 322     s->s3.tmp.key_block = NULL;
 323     s->s3.tmp.key_block_length = 0;
 324 }
 325
 326 int ssl3_init_finished_mac(SSL *s)
 327 {
 328     BIO *buf = BIO_new(BIO_s_mem());
 329
 330     if (buf == NULL) {
 331         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_INIT_FINISHED_MAC,
 332                  ERR_R_MALLOC_FAILURE);
 333         return 0;
 334     }
 335     ssl3_free_digest_list(s);
 336     s->s3.handshake_buffer = buf;
 337     (void)BIO_set_close(s->s3.handshake_buffer, BIO_CLOSE);
 338     return 1;
 339 }
 340
 341 /*
 342  * Free digest list. Also frees handshake buffer since they are always freed
 343  * together.
 344  */
 345
 346 void ssl3_free_digest_list(SSL *s)
 347 {
 348     BIO_free(s->s3.handshake_buffer);
 349     s->s3.handshake_buffer = NULL;
 350     EVP_MD_CTX_free(s->s3.handshake_dgst);
 351     s->s3.handshake_dgst = NULL;
 352 }
 353
 354 int ssl3_finish_mac(SSL *s, const unsigned char *buf, size_t len)
 355 {
 356     int ret;
 357
 358     if (s->s3.handshake_dgst == NULL) {
 359         /* Note: this writes to a memory BIO so a failure is a fatal error */
 360         if (len > INT_MAX) {
 361             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
 362                      SSL_R_OVERFLOW_ERROR);
 363             return 0;
 364         }
 365         ret = BIO_write(s->s3.handshake_buffer, (void *)buf, (int)len);
 366         if (ret <= 0 || ret != (int)len) {
 367             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
 368                      ERR_R_INTERNAL_ERROR);
 369             return 0;
 370         }
 371     } else {
 372         ret = EVP_DigestUpdate(s->s3.handshake_dgst, buf, len);
 373         if (!ret) {
 374             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINISH_MAC,
 375                      ERR_R_INTERNAL_ERROR);
 376             return 0;
 377         }
 378     }
 379     return 1;
 380 }
 381
 382 int ssl3_digest_cached_records(SSL *s, int keep)
 383 {
 384     const EVP_MD *md;
 385     long hdatalen;
 386     void *hdata;
 387
 388     if (s->s3.handshake_dgst == NULL) {
 389         hdatalen = BIO_get_mem_data(s->s3.handshake_buffer, &hdata);
 390         if (hdatalen <= 0) {
 391             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 392                      SSL_R_BAD_HANDSHAKE_LENGTH);
 393             return 0;
 394         }
 395
 396         s->s3.handshake_dgst = EVP_MD_CTX_new();
 397         if (s->s3.handshake_dgst == NULL) {
 398             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 399                      ERR_R_MALLOC_FAILURE);
 400             return 0;
 401         }
 402
 403         md = ssl_handshake_md(s);
 404         if (md == NULL || !EVP_DigestInit_ex(s->s3.handshake_dgst, md, NULL)
 405             || !EVP_DigestUpdate(s->s3.handshake_dgst, hdata, hdatalen)) {
 406             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_DIGEST_CACHED_RECORDS,
 407                      ERR_R_INTERNAL_ERROR);
 408             return 0;
 409         }
 410     }
 411     if (keep == 0) {
 412         BIO_free(s->s3.handshake_buffer);
 413         s->s3.handshake_buffer = NULL;
 414     }
 415
 416     return 1;
 417 }
 418
 419 void ssl3_digest_master_key_set_params(const SSL_SESSION *session,
 420                                        OSSL_PARAM params[])
 421 {
 422     int n = 0;
 423     params[n++] = OSSL_PARAM_construct_octet_string(OSSL_DIGEST_PARAM_SSL3_MS,
 424                                                     (void *)session->master_key,
 425                                                     session->master_key_length);
 426     params[n++] = OSSL_PARAM_construct_end();
 427 }
 428
 429 size_t ssl3_final_finish_mac(SSL *s, const char *sender, size_t len,
 430                              unsigned char *p)
 431 {
 432     int ret;
 433     EVP_MD_CTX *ctx = NULL;
 434
 435     if (!ssl3_digest_cached_records(s, 0)) {
 436         /* SSLfatal() already called */
 437         return 0;
 438     }
 439
 440     if (EVP_MD_CTX_type(s->s3.handshake_dgst) != NID_md5_sha1) {
 441         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 442                  SSL_R_NO_REQUIRED_DIGEST);
 443         return 0;
 444     }
 445
 446     ctx = EVP_MD_CTX_new();
 447     if (ctx == NULL) {
 448         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 449                  ERR_R_MALLOC_FAILURE);
 450         return 0;
 451     }
 452     if (!EVP_MD_CTX_copy_ex(ctx, s->s3.handshake_dgst)) {
 453         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 454                  ERR_R_INTERNAL_ERROR);
 455         ret = 0;
 456         goto err;
 457     }
 458
 459     ret = EVP_MD_CTX_size(ctx);
 460     if (ret < 0) {
 461         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 462                  ERR_R_INTERNAL_ERROR);
 463         ret = 0;
 464         goto err;
 465     }
 466
 467     if (sender != NULL) {
 468         OSSL_PARAM digest_cmd_params[3];
 469
 470         ssl3_digest_master_key_set_params(s->session, digest_cmd_params);
 471
 472         if (EVP_DigestUpdate(ctx, sender, len) <= 0
 473             || EVP_MD_CTX_set_params(ctx, digest_cmd_params) <= 0
 474             || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
 475                 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 476                          ERR_R_INTERNAL_ERROR);
 477                 ret = 0;
 478         }
 479     }
 480
 481  err:
 482     EVP_MD_CTX_free(ctx);
 483
 484     return ret;
 485 }
 486
 487 int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 488                                 size_t len, size_t *secret_size)
 489 {
 490     static const unsigned char *salt[3] = {
 491 #ifndef CHARSET_EBCDIC
 492         (const unsigned char *)"A",
 493         (const unsigned char *)"BB",
 494         (const unsigned char *)"CCC",
 495 #else
 496         (const unsigned char *)"\x41",
 497         (const unsigned char *)"\x42\x42",
 498         (const unsigned char *)"\x43\x43\x43",
 499 #endif
 500     };
 501     unsigned char buf[EVP_MAX_MD_SIZE];
 502     EVP_MD_CTX *ctx = EVP_MD_CTX_new();
 503     int i, ret = 1;
 504     unsigned int n;
 505     size_t ret_secret_size = 0;
 506
 507     if (ctx == NULL) {
 508         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_MASTER_SECRET,
 509                  ERR_R_MALLOC_FAILURE);
 510         return 0;
 511     }
 512     for (i = 0; i < 3; i++) {
 513         if (EVP_DigestInit_ex(ctx, s->ctx->sha1, NULL) <= 0
 514             || EVP_DigestUpdate(ctx, salt[i],
 515                                 strlen((const char *)salt[i])) <= 0
 516             || EVP_DigestUpdate(ctx, p, len) <= 0
 517             || EVP_DigestUpdate(ctx, &(s->s3.client_random[0]),
 518                                 SSL3_RANDOM_SIZE) <= 0
 519             || EVP_DigestUpdate(ctx, &(s->s3.server_random[0]),
 520                                 SSL3_RANDOM_SIZE) <= 0
 521                /* TODO(size_t) : convert me */
 522             || EVP_DigestFinal_ex(ctx, buf, &n) <= 0
 523             || EVP_DigestInit_ex(ctx, s->ctx->md5, NULL) <= 0
 524             || EVP_DigestUpdate(ctx, p, len) <= 0
 525             || EVP_DigestUpdate(ctx, buf, n) <= 0
 526             || EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
 527             SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 528                      SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR);
 529             ret = 0;
 530             break;
 531         }
 532         out += n;
 533         ret_secret_size += n;
 534     }
 535     EVP_MD_CTX_free(ctx);
 536
 537     OPENSSL_cleanse(buf, sizeof(buf));
 538     if (ret)
 539         *secret_size = ret_secret_size;
 540     return ret;
 541 }
 542
 543 int ssl3_alert_code(int code)
 544 {
 545     switch (code) {
 546     case SSL_AD_CLOSE_NOTIFY:
 547         return SSL3_AD_CLOSE_NOTIFY;
 548     case SSL_AD_UNEXPECTED_MESSAGE:
 549         return SSL3_AD_UNEXPECTED_MESSAGE;
 550     case SSL_AD_BAD_RECORD_MAC:
 551         return SSL3_AD_BAD_RECORD_MAC;
 552     case SSL_AD_DECRYPTION_FAILED:
 553         return SSL3_AD_BAD_RECORD_MAC;
 554     case SSL_AD_RECORD_OVERFLOW:
 555         return SSL3_AD_BAD_RECORD_MAC;
 556     case SSL_AD_DECOMPRESSION_FAILURE:
 557         return SSL3_AD_DECOMPRESSION_FAILURE;
 558     case SSL_AD_HANDSHAKE_FAILURE:
 559         return SSL3_AD_HANDSHAKE_FAILURE;
 560     case SSL_AD_NO_CERTIFICATE:
 561         return SSL3_AD_NO_CERTIFICATE;
 562     case SSL_AD_BAD_CERTIFICATE:
 563         return SSL3_AD_BAD_CERTIFICATE;
 564     case SSL_AD_UNSUPPORTED_CERTIFICATE:
 565         return SSL3_AD_UNSUPPORTED_CERTIFICATE;
 566     case SSL_AD_CERTIFICATE_REVOKED:
 567         return SSL3_AD_CERTIFICATE_REVOKED;
 568     case SSL_AD_CERTIFICATE_EXPIRED:
 569         return SSL3_AD_CERTIFICATE_EXPIRED;
 570     case SSL_AD_CERTIFICATE_UNKNOWN:
 571         return SSL3_AD_CERTIFICATE_UNKNOWN;
 572     case SSL_AD_ILLEGAL_PARAMETER:
 573         return SSL3_AD_ILLEGAL_PARAMETER;
 574     case SSL_AD_UNKNOWN_CA:
 575         return SSL3_AD_BAD_CERTIFICATE;
 576     case SSL_AD_ACCESS_DENIED:
 577         return SSL3_AD_HANDSHAKE_FAILURE;
 578     case SSL_AD_DECODE_ERROR:
 579         return SSL3_AD_HANDSHAKE_FAILURE;
 580     case SSL_AD_DECRYPT_ERROR:
 581         return SSL3_AD_HANDSHAKE_FAILURE;
 582     case SSL_AD_EXPORT_RESTRICTION:
 583         return SSL3_AD_HANDSHAKE_FAILURE;
 584     case SSL_AD_PROTOCOL_VERSION:
 585         return SSL3_AD_HANDSHAKE_FAILURE;
 586     case SSL_AD_INSUFFICIENT_SECURITY:
 587         return SSL3_AD_HANDSHAKE_FAILURE;
 588     case SSL_AD_INTERNAL_ERROR:
 589         return SSL3_AD_HANDSHAKE_FAILURE;
 590     case SSL_AD_USER_CANCELLED:
 591         return SSL3_AD_HANDSHAKE_FAILURE;
 592     case SSL_AD_NO_RENEGOTIATION:
 593         return -1;            /* Don't send it :-) */
 594     case SSL_AD_UNSUPPORTED_EXTENSION:
 595         return SSL3_AD_HANDSHAKE_FAILURE;
 596     case SSL_AD_CERTIFICATE_UNOBTAINABLE:
 597         return SSL3_AD_HANDSHAKE_FAILURE;
 598     case SSL_AD_UNRECOGNIZED_NAME:
 599         return SSL3_AD_HANDSHAKE_FAILURE;
 600     case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
 601         return SSL3_AD_HANDSHAKE_FAILURE;
 602     case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
 603         return SSL3_AD_HANDSHAKE_FAILURE;
 604     case SSL_AD_UNKNOWN_PSK_IDENTITY:
 605         return TLS1_AD_UNKNOWN_PSK_IDENTITY;
 606     case SSL_AD_INAPPROPRIATE_FALLBACK:
 607         return TLS1_AD_INAPPROPRIATE_FALLBACK;
 608     case SSL_AD_NO_APPLICATION_PROTOCOL:
 609         return TLS1_AD_NO_APPLICATION_PROTOCOL;
 610     case SSL_AD_CERTIFICATE_REQUIRED:
 611         return SSL_AD_HANDSHAKE_FAILURE;
 612     default:
 613         return -1;
 614     }
 615 }