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 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         s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
 159         if (s->enc_write_ctx != NULL) {
 160             reuse_dd = 1;
 161         } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
 162             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 163                      ERR_R_MALLOC_FAILURE);
 164             goto err;
 165         } else {
 166             /*
 167              * make sure it's initialised in case we exit later with an error
 168              */
 169             EVP_CIPHER_CTX_reset(s->enc_write_ctx);
 170         }
 171         dd = s->enc_write_ctx;
 172         if (ssl_replace_hash(&s->write_hash, m) == NULL) {
 173             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 174                      ERR_R_MALLOC_FAILURE);
 175             goto err;
 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                 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 185                          SSL_F_SSL3_CHANGE_CIPHER_STATE,
 186                          SSL_R_COMPRESSION_LIBRARY_ERROR);
 187                 goto err;
 188             }
 189         }
 190 #endif
 191         RECORD_LAYER_reset_write_sequence(&s->rlayer);
 192         mac_secret = &(s->s3->write_mac_secret[0]);
 193     }
 194
 195     if (reuse_dd)
 196         EVP_CIPHER_CTX_reset(dd);
 197
 198     p = s->s3->tmp.key_block;
 199     mdi = EVP_MD_size(m);
 200     if (mdi < 0) {
 201         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 202                  ERR_R_INTERNAL_ERROR);
 203         goto err;
 204     }
 205     i = mdi;
 206     cl = EVP_CIPHER_key_length(c);
 207     j = cl;
 208     k = EVP_CIPHER_iv_length(c);
 209     if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 210         (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
 211         ms = &(p[0]);
 212         n = i + i;
 213         key = &(p[n]);
 214         n += j + j;
 215         iv = &(p[n]);
 216         n += k + k;
 217     } else {
 218         n = i;
 219         ms = &(p[n]);
 220         n += i + j;
 221         key = &(p[n]);
 222         n += j + k;
 223         iv = &(p[n]);
 224         n += k;
 225     }
 226
 227     if (n > s->s3->tmp.key_block_length) {
 228         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 229                  ERR_R_INTERNAL_ERROR);
 230         goto err;
 231     }
 232
 233     memcpy(mac_secret, ms, i);
 234
 235     if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
 236         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_CHANGE_CIPHER_STATE,
 237                  ERR_R_INTERNAL_ERROR);
 238         goto err;
 239     }
 240
 241     s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
 242     OPENSSL_cleanse(exp_key, sizeof(exp_key));
 243     OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
 244     return 1;
 245  err:
 246     OPENSSL_cleanse(exp_key, sizeof(exp_key));
 247     OPENSSL_cleanse(exp_iv, sizeof(exp_iv));
 248     return 0;
 249 }
 250
 251 int ssl3_setup_key_block(SSL *s)
 252 {
 253     unsigned char *p;
 254     const EVP_CIPHER *c;
 255     const EVP_MD *hash;
 256     int num;
 257     int ret = 0;
 258     SSL_COMP *comp;
 259
 260     if (s->s3->tmp.key_block_length != 0)
 261         return 1;
 262
 263     if (!ssl_cipher_get_evp(s->session, &c, &hash, NULL, NULL, &comp, 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     s->s3->tmp.new_sym_enc = c;
 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 size_t ssl3_final_finish_mac(SSL *s, const char *sender, size_t len,
 420                              unsigned char *p)
 421 {
 422     int ret;
 423     EVP_MD_CTX *ctx = NULL;
 424
 425     if (!ssl3_digest_cached_records(s, 0)) {
 426         /* SSLfatal() already called */
 427         return 0;
 428     }
 429
 430     if (EVP_MD_CTX_type(s->s3->handshake_dgst) != NID_md5_sha1) {
 431         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 432                  SSL_R_NO_REQUIRED_DIGEST);
 433         return 0;
 434     }
 435
 436     ctx = EVP_MD_CTX_new();
 437     if (ctx == NULL) {
 438         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 439                  ERR_R_MALLOC_FAILURE);
 440         return 0;
 441     }
 442     if (!EVP_MD_CTX_copy_ex(ctx, s->s3->handshake_dgst)) {
 443         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 444                  ERR_R_INTERNAL_ERROR);
 445         ret = 0;
 446         goto err;
 447     }
 448
 449     ret = EVP_MD_CTX_size(ctx);
 450     if (ret < 0) {
 451         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 452                  ERR_R_INTERNAL_ERROR);
 453         ret = 0;
 454         goto err;
 455     }
 456
 457     if ((sender != NULL && EVP_DigestUpdate(ctx, sender, len) <= 0)
 458         || EVP_MD_CTX_ctrl(ctx, EVP_CTRL_SSL3_MASTER_SECRET,
 459                            (int)s->session->master_key_length,
 460                            s->session->master_key) <= 0
 461         || EVP_DigestFinal_ex(ctx, p, NULL) <= 0) {
 462         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_FINAL_FINISH_MAC,
 463                  ERR_R_INTERNAL_ERROR);
 464         ret = 0;
 465     }
 466
 467  err:
 468     EVP_MD_CTX_free(ctx);
 469
 470     return ret;
 471 }
 472
 473 int ssl3_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
 474                                 size_t len, size_t *secret_size)
 475 {
 476     static const unsigned char *salt[3] = {
 477 #ifndef CHARSET_EBCDIC
 478         (const unsigned char *)"A",
 479         (const unsigned char *)"BB",
 480         (const unsigned char *)"CCC",
 481 #else
 482         (const unsigned char *)"\x41",
 483         (const unsigned char *)"\x42\x42",
 484         (const unsigned char *)"\x43\x43\x43",
 485 #endif
 486     };
 487     unsigned char buf[EVP_MAX_MD_SIZE];
 488     EVP_MD_CTX *ctx = EVP_MD_CTX_new();
 489     int i, ret = 1;
 490     unsigned int n;
 491     size_t ret_secret_size = 0;
 492
 493     if (ctx == NULL) {
 494         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_GENERATE_MASTER_SECRET,
 495                  ERR_R_MALLOC_FAILURE);
 496         return 0;
 497     }
 498     for (i = 0; i < 3; i++) {
 499         if (EVP_DigestInit_ex(ctx, s->ctx->sha1, NULL) <= 0
 500             || EVP_DigestUpdate(ctx, salt[i],
 501                                 strlen((const char *)salt[i])) <= 0
 502             || EVP_DigestUpdate(ctx, p, len) <= 0
 503             || EVP_DigestUpdate(ctx, &(s->s3->client_random[0]),
 504                                 SSL3_RANDOM_SIZE) <= 0
 505             || EVP_DigestUpdate(ctx, &(s->s3->server_random[0]),
 506                                 SSL3_RANDOM_SIZE) <= 0
 507                /* TODO(size_t) : convert me */
 508             || EVP_DigestFinal_ex(ctx, buf, &n) <= 0
 509             || EVP_DigestInit_ex(ctx, s->ctx->md5, NULL) <= 0
 510             || EVP_DigestUpdate(ctx, p, len) <= 0
 511             || EVP_DigestUpdate(ctx, buf, n) <= 0
 512             || EVP_DigestFinal_ex(ctx, out, &n) <= 0) {
 513             SSLfatal(s, SSL_AD_INTERNAL_ERROR,
 514                      SSL_F_SSL3_GENERATE_MASTER_SECRET, ERR_R_INTERNAL_ERROR);
 515             ret = 0;
 516             break;
 517         }
 518         out += n;
 519         ret_secret_size += n;
 520     }
 521     EVP_MD_CTX_free(ctx);
 522
 523     OPENSSL_cleanse(buf, sizeof(buf));
 524     if (ret)
 525         *secret_size = ret_secret_size;
 526     return ret;
 527 }
 528
 529 int ssl3_alert_code(int code)
 530 {
 531     switch (code) {
 532     case SSL_AD_CLOSE_NOTIFY:
 533         return SSL3_AD_CLOSE_NOTIFY;
 534     case SSL_AD_UNEXPECTED_MESSAGE:
 535         return SSL3_AD_UNEXPECTED_MESSAGE;
 536     case SSL_AD_BAD_RECORD_MAC:
 537         return SSL3_AD_BAD_RECORD_MAC;
 538     case SSL_AD_DECRYPTION_FAILED:
 539         return SSL3_AD_BAD_RECORD_MAC;
 540     case SSL_AD_RECORD_OVERFLOW:
 541         return SSL3_AD_BAD_RECORD_MAC;
 542     case SSL_AD_DECOMPRESSION_FAILURE:
 543         return SSL3_AD_DECOMPRESSION_FAILURE;
 544     case SSL_AD_HANDSHAKE_FAILURE:
 545         return SSL3_AD_HANDSHAKE_FAILURE;
 546     case SSL_AD_NO_CERTIFICATE:
 547         return SSL3_AD_NO_CERTIFICATE;
 548     case SSL_AD_BAD_CERTIFICATE:
 549         return SSL3_AD_BAD_CERTIFICATE;
 550     case SSL_AD_UNSUPPORTED_CERTIFICATE:
 551         return SSL3_AD_UNSUPPORTED_CERTIFICATE;
 552     case SSL_AD_CERTIFICATE_REVOKED:
 553         return SSL3_AD_CERTIFICATE_REVOKED;
 554     case SSL_AD_CERTIFICATE_EXPIRED:
 555         return SSL3_AD_CERTIFICATE_EXPIRED;
 556     case SSL_AD_CERTIFICATE_UNKNOWN:
 557         return SSL3_AD_CERTIFICATE_UNKNOWN;
 558     case SSL_AD_ILLEGAL_PARAMETER:
 559         return SSL3_AD_ILLEGAL_PARAMETER;
 560     case SSL_AD_UNKNOWN_CA:
 561         return SSL3_AD_BAD_CERTIFICATE;
 562     case SSL_AD_ACCESS_DENIED:
 563         return SSL3_AD_HANDSHAKE_FAILURE;
 564     case SSL_AD_DECODE_ERROR:
 565         return SSL3_AD_HANDSHAKE_FAILURE;
 566     case SSL_AD_DECRYPT_ERROR:
 567         return SSL3_AD_HANDSHAKE_FAILURE;
 568     case SSL_AD_EXPORT_RESTRICTION:
 569         return SSL3_AD_HANDSHAKE_FAILURE;
 570     case SSL_AD_PROTOCOL_VERSION:
 571         return SSL3_AD_HANDSHAKE_FAILURE;
 572     case SSL_AD_INSUFFICIENT_SECURITY:
 573         return SSL3_AD_HANDSHAKE_FAILURE;
 574     case SSL_AD_INTERNAL_ERROR:
 575         return SSL3_AD_HANDSHAKE_FAILURE;
 576     case SSL_AD_USER_CANCELLED:
 577         return SSL3_AD_HANDSHAKE_FAILURE;
 578     case SSL_AD_NO_RENEGOTIATION:
 579         return -1;            /* Don't send it :-) */
 580     case SSL_AD_UNSUPPORTED_EXTENSION:
 581         return SSL3_AD_HANDSHAKE_FAILURE;
 582     case SSL_AD_CERTIFICATE_UNOBTAINABLE:
 583         return SSL3_AD_HANDSHAKE_FAILURE;
 584     case SSL_AD_UNRECOGNIZED_NAME:
 585         return SSL3_AD_HANDSHAKE_FAILURE;
 586     case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
 587         return SSL3_AD_HANDSHAKE_FAILURE;
 588     case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
 589         return SSL3_AD_HANDSHAKE_FAILURE;
 590     case SSL_AD_UNKNOWN_PSK_IDENTITY:
 591         return TLS1_AD_UNKNOWN_PSK_IDENTITY;
 592     case SSL_AD_INAPPROPRIATE_FALLBACK:
 593         return TLS1_AD_INAPPROPRIATE_FALLBACK;
 594     case SSL_AD_NO_APPLICATION_PROTOCOL:
 595         return TLS1_AD_NO_APPLICATION_PROTOCOL;
 596     case SSL_AD_CERTIFICATE_REQUIRED:
 597         return SSL_AD_HANDSHAKE_FAILURE;
 598     default:
 599         return -1;
 600     }
 601 }