ssl/t1_enc.c

   1 /*
   2  * Copyright 1995-2022 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 "record/record_local.h"
  14 #include "internal/ktls.h"
  15 #include "internal/cryptlib.h"
  16 #include <openssl/comp.h>
  17 #include <openssl/evp.h>
  18 #include <openssl/kdf.h>
  19 #include <openssl/rand.h>
  20 #include <openssl/obj_mac.h>
  21 #include <openssl/core_names.h>
  22 #include <openssl/trace.h>
  23
  24 /* seed1 through seed5 are concatenated */
  25 static int tls1_PRF(SSL_CONNECTION *s,
  26                     const void *seed1, size_t seed1_len,
  27                     const void *seed2, size_t seed2_len,
  28                     const void *seed3, size_t seed3_len,
  29                     const void *seed4, size_t seed4_len,
  30                     const void *seed5, size_t seed5_len,
  31                     const unsigned char *sec, size_t slen,
  32                     unsigned char *out, size_t olen, int fatal)
  33 {
  34     const EVP_MD *md = ssl_prf_md(s);
  35     EVP_KDF *kdf;
  36     EVP_KDF_CTX *kctx = NULL;
  37     OSSL_PARAM params[8], *p = params;
  38     const char *mdname;
  39
  40     if (md == NULL) {
  41         /* Should never happen */
  42         if (fatal)
  43             SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
  44         else
  45             ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
  46         return 0;
  47     }
  48     kdf = EVP_KDF_fetch(SSL_CONNECTION_GET_CTX(s)->libctx,
  49                         OSSL_KDF_NAME_TLS1_PRF,
  50                         SSL_CONNECTION_GET_CTX(s)->propq);
  51     if (kdf == NULL)
  52         goto err;
  53     kctx = EVP_KDF_CTX_new(kdf);
  54     EVP_KDF_free(kdf);
  55     if (kctx == NULL)
  56         goto err;
  57     mdname = EVP_MD_get0_name(md);
  58     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
  59                                             (char *)mdname, 0);
  60     *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET,
  61                                              (unsigned char *)sec,
  62                                              (size_t)slen);
  63     *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
  64                                              (void *)seed1, (size_t)seed1_len);
  65     *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
  66                                              (void *)seed2, (size_t)seed2_len);
  67     *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
  68                                              (void *)seed3, (size_t)seed3_len);
  69     *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
  70                                              (void *)seed4, (size_t)seed4_len);
  71     *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
  72                                              (void *)seed5, (size_t)seed5_len);
  73     *p = OSSL_PARAM_construct_end();
  74     if (EVP_KDF_derive(kctx, out, olen, params)) {
  75         EVP_KDF_CTX_free(kctx);
  76         return 1;
  77     }
  78
  79  err:
  80     if (fatal)
  81         SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
  82     else
  83         ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
  84     EVP_KDF_CTX_free(kctx);
  85     return 0;
  86 }
  87
  88 static int tls1_generate_key_block(SSL_CONNECTION *s, unsigned char *km,
  89                                    size_t num)
  90 {
  91     int ret;
  92
  93     /* Calls SSLfatal() as required */
  94     ret = tls1_PRF(s,
  95                    TLS_MD_KEY_EXPANSION_CONST,
  96                    TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3.server_random,
  97                    SSL3_RANDOM_SIZE, s->s3.client_random, SSL3_RANDOM_SIZE,
  98                    NULL, 0, NULL, 0, s->session->master_key,
  99                    s->session->master_key_length, km, num, 1);
 100
 101     return ret;
 102 }
 103
 104 int tls_provider_set_tls_params(SSL_CONNECTION *s, EVP_CIPHER_CTX *ctx,
 105                                 const EVP_CIPHER *ciph,
 106                                 const EVP_MD *md)
 107 {
 108     /*
 109      * Provided cipher, the TLS padding/MAC removal is performed provider
 110      * side so we need to tell the ctx about our TLS version and mac size
 111      */
 112     OSSL_PARAM params[3], *pprm = params;
 113     size_t macsize = 0;
 114     int imacsize = -1;
 115
 116     if ((EVP_CIPHER_get_flags(ciph) & EVP_CIPH_FLAG_AEAD_CIPHER) == 0
 117                /*
 118                 * We look at s->ext.use_etm instead of SSL_READ_ETM() or
 119                 * SSL_WRITE_ETM() because this test applies to both reading
 120                 * and writing.
 121                 */
 122             && !s->ext.use_etm)
 123         imacsize = EVP_MD_get_size(md);
 124     if (imacsize >= 0)
 125         macsize = (size_t)imacsize;
 126
 127     *pprm++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION,
 128                                        &s->version);
 129     *pprm++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE,
 130                                           &macsize);
 131     *pprm = OSSL_PARAM_construct_end();
 132
 133     if (!EVP_CIPHER_CTX_set_params(ctx, params)) {
 134         SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
 135         return 0;
 136     }
 137
 138     return 1;
 139 }
 140
 141
 142 static int tls_iv_length_within_key_block(const EVP_CIPHER *c)
 143 {
 144     /* If GCM/CCM mode only part of IV comes from PRF */
 145     if (EVP_CIPHER_get_mode(c) == EVP_CIPH_GCM_MODE)
 146         return EVP_GCM_TLS_FIXED_IV_LEN;
 147     else if (EVP_CIPHER_get_mode(c) == EVP_CIPH_CCM_MODE)
 148         return EVP_CCM_TLS_FIXED_IV_LEN;
 149     else
 150         return EVP_CIPHER_get_iv_length(c);
 151 }
 152
 153 int tls1_change_cipher_state(SSL_CONNECTION *s, int which)
 154 {
 155     unsigned char *p, *mac_secret;
 156     unsigned char *key, *iv;
 157     const EVP_CIPHER *c;
 158     const SSL_COMP *comp = NULL;
 159     const EVP_MD *m;
 160     int mac_type;
 161     size_t mac_secret_size;
 162     size_t n, i, j, k, cl;
 163     int iivlen;
 164     /*
 165      * Taglen is only relevant for CCM ciphersuites. Other ciphersuites
 166      * ignore this value so we can default it to 0.
 167      */
 168     size_t taglen = 0;
 169     int direction;
 170
 171     c = s->s3.tmp.new_sym_enc;
 172     m = s->s3.tmp.new_hash;
 173     mac_type = s->s3.tmp.new_mac_pkey_type;
 174 #ifndef OPENSSL_NO_COMP
 175     comp = s->s3.tmp.new_compression;
 176 #endif
 177
 178     p = s->s3.tmp.key_block;
 179     i = mac_secret_size = s->s3.tmp.new_mac_secret_size;
 180
 181     cl = EVP_CIPHER_get_key_length(c);
 182     j = cl;
 183     iivlen = tls_iv_length_within_key_block(c);
 184     if (iivlen < 0) {
 185         SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
 186         goto err;
 187     }
 188     k = iivlen;
 189     if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
 190         (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
 191         mac_secret = &(p[0]);
 192         n = i + i;
 193         key = &(p[n]);
 194         n += j + j;
 195         iv = &(p[n]);
 196         n += k + k;
 197     } else {
 198         n = i;
 199         mac_secret = &(p[n]);
 200         n += i + j;
 201         key = &(p[n]);
 202         n += j + k;
 203         iv = &(p[n]);
 204         n += k;
 205     }
 206
 207     if (n > s->s3.tmp.key_block_length) {
 208         SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
 209         goto err;
 210     }
 211
 212     switch (EVP_CIPHER_get_mode(c)) {
 213     case EVP_CIPH_GCM_MODE:
 214         taglen = EVP_GCM_TLS_TAG_LEN;
 215         break;
 216     case EVP_CIPH_CCM_MODE:
 217         if ((s->s3.tmp.new_cipher->algorithm_enc
 218                 & (SSL_AES128CCM8 | SSL_AES256CCM8)) != 0)
 219             taglen = EVP_CCM8_TLS_TAG_LEN;
 220         else
 221             taglen = EVP_CCM_TLS_TAG_LEN;
 222         break;
 223     default:
 224         if (EVP_CIPHER_is_a(c, "CHACHA20-POLY1305")) {
 225             taglen = EVP_CHACHAPOLY_TLS_TAG_LEN;
 226         } else {
 227             /* MAC secret size corresponds to the MAC output size */
 228             taglen = s->s3.tmp.new_mac_secret_size;
 229         }
 230         break;
 231     }
 232
 233     if (which & SSL3_CC_READ) {
 234         if (s->ext.use_etm)
 235             s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
 236         else
 237             s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
 238
 239         if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 240             s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
 241         else
 242             s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
 243
 244         if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
 245             s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
 246         else
 247             s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
 248
 249         direction = OSSL_RECORD_DIRECTION_READ;
 250     } else {
 251         if (s->ext.use_etm)
 252             s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
 253         else
 254             s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
 255
 256         if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
 257             s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
 258         else
 259             s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
 260
 261         if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
 262             s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
 263         else
 264             s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
 265
 266         direction = OSSL_RECORD_DIRECTION_WRITE;
 267     }
 268
 269     if (!ssl_set_new_record_layer(s, s->version, direction,
 270                                     OSSL_RECORD_PROTECTION_LEVEL_APPLICATION,
 271                                     NULL, 0, key, cl, iv, (size_t)k, mac_secret,
 272                                     mac_secret_size, c, taglen, mac_type,
 273                                     m, comp, NULL)) {
 274         /* SSLfatal already called */
 275         goto err;
 276     }
 277
 278     OSSL_TRACE_BEGIN(TLS) {
 279         BIO_printf(trc_out, "which = %04X, key:\n", which);
 280         BIO_dump_indent(trc_out, key, EVP_CIPHER_get_key_length(c), 4);
 281         BIO_printf(trc_out, "iv:\n");
 282         BIO_dump_indent(trc_out, iv, k, 4);
 283     } OSSL_TRACE_END(TLS);
 284
 285     return 1;
 286  err:
 287     return 0;
 288 }
 289
 290 int tls1_setup_key_block(SSL_CONNECTION *s)
 291 {
 292     unsigned char *p;
 293     const EVP_CIPHER *c;
 294     const EVP_MD *hash;
 295     SSL_COMP *comp;
 296     int mac_type = NID_undef;
 297     size_t num, mac_secret_size = 0;
 298     int ret = 0;
 299     int ivlen;
 300
 301     if (s->s3.tmp.key_block_length != 0)
 302         return 1;
 303
 304     if (!ssl_cipher_get_evp(SSL_CONNECTION_GET_CTX(s), s->session, &c, &hash,
 305                             &mac_type, &mac_secret_size, &comp,
 306                             s->ext.use_etm)) {
 307         /* Error is already recorded */
 308         SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR);
 309         return 0;
 310     }
 311
 312     ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
 313     s->s3.tmp.new_sym_enc = c;
 314     ssl_evp_md_free(s->s3.tmp.new_hash);
 315     s->s3.tmp.new_hash = hash;
 316     s->s3.tmp.new_mac_pkey_type = mac_type;
 317     s->s3.tmp.new_mac_secret_size = mac_secret_size;
 318     ivlen = tls_iv_length_within_key_block(c);
 319     if (ivlen < 0) {
 320         SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
 321         return 0;
 322     }
 323     num = mac_secret_size + EVP_CIPHER_get_key_length(c) + ivlen;
 324     num *= 2;
 325
 326     ssl3_cleanup_key_block(s);
 327
 328     if ((p = OPENSSL_malloc(num)) == NULL) {
 329         SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_CRYPTO_LIB);
 330         goto err;
 331     }
 332
 333     s->s3.tmp.key_block_length = num;
 334     s->s3.tmp.key_block = p;
 335
 336     OSSL_TRACE_BEGIN(TLS) {
 337         BIO_printf(trc_out, "key block length: %zu\n", num);
 338         BIO_printf(trc_out, "client random\n");
 339         BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
 340         BIO_printf(trc_out, "server random\n");
 341         BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
 342         BIO_printf(trc_out, "master key\n");
 343         BIO_dump_indent(trc_out,
 344                         s->session->master_key,
 345                         s->session->master_key_length, 4);
 346     } OSSL_TRACE_END(TLS);
 347
 348     if (!tls1_generate_key_block(s, p, num)) {
 349         /* SSLfatal() already called */
 350         goto err;
 351     }
 352
 353     OSSL_TRACE_BEGIN(TLS) {
 354         BIO_printf(trc_out, "key block\n");
 355         BIO_dump_indent(trc_out, p, num, 4);
 356     } OSSL_TRACE_END(TLS);
 357
 358     ret = 1;
 359  err:
 360     return ret;
 361 }
 362
 363 size_t tls1_final_finish_mac(SSL_CONNECTION *s, const char *str,
 364                              size_t slen, unsigned char *out)
 365 {
 366     size_t hashlen;
 367     unsigned char hash[EVP_MAX_MD_SIZE];
 368     size_t finished_size = TLS1_FINISH_MAC_LENGTH;
 369
 370     if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kGOST18)
 371         finished_size = 32;
 372
 373     if (!ssl3_digest_cached_records(s, 0)) {
 374         /* SSLfatal() already called */
 375         return 0;
 376     }
 377
 378     if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
 379         /* SSLfatal() already called */
 380         return 0;
 381     }
 382
 383     if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
 384                   s->session->master_key, s->session->master_key_length,
 385                   out, finished_size, 1)) {
 386         /* SSLfatal() already called */
 387         return 0;
 388     }
 389     OPENSSL_cleanse(hash, hashlen);
 390     return finished_size;
 391 }
 392
 393 int tls1_generate_master_secret(SSL_CONNECTION *s, unsigned char *out,
 394                                 unsigned char *p, size_t len,
 395                                 size_t *secret_size)
 396 {
 397     if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
 398         unsigned char hash[EVP_MAX_MD_SIZE * 2];
 399         size_t hashlen;
 400         /*
 401          * Digest cached records keeping record buffer (if present): this won't
 402          * affect client auth because we're freezing the buffer at the same
 403          * point (after client key exchange and before certificate verify)
 404          */
 405         if (!ssl3_digest_cached_records(s, 1)
 406                 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
 407             /* SSLfatal() already called */
 408             return 0;
 409         }
 410         OSSL_TRACE_BEGIN(TLS) {
 411             BIO_printf(trc_out, "Handshake hashes:\n");
 412             BIO_dump(trc_out, (char *)hash, hashlen);
 413         } OSSL_TRACE_END(TLS);
 414         if (!tls1_PRF(s,
 415                       TLS_MD_EXTENDED_MASTER_SECRET_CONST,
 416                       TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
 417                       hash, hashlen,
 418                       NULL, 0,
 419                       NULL, 0,
 420                       NULL, 0, p, len, out,
 421                       SSL3_MASTER_SECRET_SIZE, 1)) {
 422             /* SSLfatal() already called */
 423             return 0;
 424         }
 425         OPENSSL_cleanse(hash, hashlen);
 426     } else {
 427         if (!tls1_PRF(s,
 428                       TLS_MD_MASTER_SECRET_CONST,
 429                       TLS_MD_MASTER_SECRET_CONST_SIZE,
 430                       s->s3.client_random, SSL3_RANDOM_SIZE,
 431                       NULL, 0,
 432                       s->s3.server_random, SSL3_RANDOM_SIZE,
 433                       NULL, 0, p, len, out,
 434                       SSL3_MASTER_SECRET_SIZE, 1)) {
 435            /* SSLfatal() already called */
 436             return 0;
 437         }
 438     }
 439
 440     OSSL_TRACE_BEGIN(TLS) {
 441         BIO_printf(trc_out, "Premaster Secret:\n");
 442         BIO_dump_indent(trc_out, p, len, 4);
 443         BIO_printf(trc_out, "Client Random:\n");
 444         BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
 445         BIO_printf(trc_out, "Server Random:\n");
 446         BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
 447         BIO_printf(trc_out, "Master Secret:\n");
 448         BIO_dump_indent(trc_out,
 449                         s->session->master_key,
 450                         SSL3_MASTER_SECRET_SIZE, 4);
 451     } OSSL_TRACE_END(TLS);
 452
 453     *secret_size = SSL3_MASTER_SECRET_SIZE;
 454     return 1;
 455 }
 456
 457 int tls1_export_keying_material(SSL_CONNECTION *s, unsigned char *out,
 458                                 size_t olen, const char *label, size_t llen,
 459                                 const unsigned char *context,
 460                                 size_t contextlen, int use_context)
 461 {
 462     unsigned char *val = NULL;
 463     size_t vallen = 0, currentvalpos;
 464     int rv = 0;
 465
 466     /*
 467      * construct PRF arguments we construct the PRF argument ourself rather
 468      * than passing separate values into the TLS PRF to ensure that the
 469      * concatenation of values does not create a prohibited label.
 470      */
 471     vallen = llen + SSL3_RANDOM_SIZE * 2;
 472     if (use_context) {
 473         vallen += 2 + contextlen;
 474     }
 475
 476     val = OPENSSL_malloc(vallen);
 477     if (val == NULL)
 478         goto ret;
 479     currentvalpos = 0;
 480     memcpy(val + currentvalpos, (unsigned char *)label, llen);
 481     currentvalpos += llen;
 482     memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
 483     currentvalpos += SSL3_RANDOM_SIZE;
 484     memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
 485     currentvalpos += SSL3_RANDOM_SIZE;
 486
 487     if (use_context) {
 488         val[currentvalpos] = (contextlen >> 8) & 0xff;
 489         currentvalpos++;
 490         val[currentvalpos] = contextlen & 0xff;
 491         currentvalpos++;
 492         if ((contextlen > 0) || (context != NULL)) {
 493             memcpy(val + currentvalpos, context, contextlen);
 494         }
 495     }
 496
 497     /*
 498      * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
 499      * label len) = 15, so size of val > max(prohibited label len) = 15 and
 500      * the comparisons won't have buffer overflow
 501      */
 502     if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
 503                TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
 504         goto err1;
 505     if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
 506                TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
 507         goto err1;
 508     if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
 509                TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
 510         goto err1;
 511     if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
 512                TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
 513         goto err1;
 514     if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
 515                TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
 516         goto err1;
 517
 518     rv = tls1_PRF(s,
 519                   val, vallen,
 520                   NULL, 0,
 521                   NULL, 0,
 522                   NULL, 0,
 523                   NULL, 0,
 524                   s->session->master_key, s->session->master_key_length,
 525                   out, olen, 0);
 526
 527     goto ret;
 528  err1:
 529     ERR_raise(ERR_LIB_SSL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
 530  ret:
 531     OPENSSL_clear_free(val, vallen);
 532     return rv;
 533 }
 534
 535 int tls1_alert_code(int code)
 536 {
 537     switch (code) {
 538     case SSL_AD_CLOSE_NOTIFY:
 539         return SSL3_AD_CLOSE_NOTIFY;
 540     case SSL_AD_UNEXPECTED_MESSAGE:
 541         return SSL3_AD_UNEXPECTED_MESSAGE;
 542     case SSL_AD_BAD_RECORD_MAC:
 543         return SSL3_AD_BAD_RECORD_MAC;
 544     case SSL_AD_DECRYPTION_FAILED:
 545         return TLS1_AD_DECRYPTION_FAILED;
 546     case SSL_AD_RECORD_OVERFLOW:
 547         return TLS1_AD_RECORD_OVERFLOW;
 548     case SSL_AD_DECOMPRESSION_FAILURE:
 549         return SSL3_AD_DECOMPRESSION_FAILURE;
 550     case SSL_AD_HANDSHAKE_FAILURE:
 551         return SSL3_AD_HANDSHAKE_FAILURE;
 552     case SSL_AD_NO_CERTIFICATE:
 553         return -1;
 554     case SSL_AD_BAD_CERTIFICATE:
 555         return SSL3_AD_BAD_CERTIFICATE;
 556     case SSL_AD_UNSUPPORTED_CERTIFICATE:
 557         return SSL3_AD_UNSUPPORTED_CERTIFICATE;
 558     case SSL_AD_CERTIFICATE_REVOKED:
 559         return SSL3_AD_CERTIFICATE_REVOKED;
 560     case SSL_AD_CERTIFICATE_EXPIRED:
 561         return SSL3_AD_CERTIFICATE_EXPIRED;
 562     case SSL_AD_CERTIFICATE_UNKNOWN:
 563         return SSL3_AD_CERTIFICATE_UNKNOWN;
 564     case SSL_AD_ILLEGAL_PARAMETER:
 565         return SSL3_AD_ILLEGAL_PARAMETER;
 566     case SSL_AD_UNKNOWN_CA:
 567         return TLS1_AD_UNKNOWN_CA;
 568     case SSL_AD_ACCESS_DENIED:
 569         return TLS1_AD_ACCESS_DENIED;
 570     case SSL_AD_DECODE_ERROR:
 571         return TLS1_AD_DECODE_ERROR;
 572     case SSL_AD_DECRYPT_ERROR:
 573         return TLS1_AD_DECRYPT_ERROR;
 574     case SSL_AD_EXPORT_RESTRICTION:
 575         return TLS1_AD_EXPORT_RESTRICTION;
 576     case SSL_AD_PROTOCOL_VERSION:
 577         return TLS1_AD_PROTOCOL_VERSION;
 578     case SSL_AD_INSUFFICIENT_SECURITY:
 579         return TLS1_AD_INSUFFICIENT_SECURITY;
 580     case SSL_AD_INTERNAL_ERROR:
 581         return TLS1_AD_INTERNAL_ERROR;
 582     case SSL_AD_USER_CANCELLED:
 583         return TLS1_AD_USER_CANCELLED;
 584     case SSL_AD_NO_RENEGOTIATION:
 585         return TLS1_AD_NO_RENEGOTIATION;
 586     case SSL_AD_UNSUPPORTED_EXTENSION:
 587         return TLS1_AD_UNSUPPORTED_EXTENSION;
 588     case SSL_AD_CERTIFICATE_UNOBTAINABLE:
 589         return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
 590     case SSL_AD_UNRECOGNIZED_NAME:
 591         return TLS1_AD_UNRECOGNIZED_NAME;
 592     case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
 593         return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
 594     case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
 595         return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
 596     case SSL_AD_UNKNOWN_PSK_IDENTITY:
 597         return TLS1_AD_UNKNOWN_PSK_IDENTITY;
 598     case SSL_AD_INAPPROPRIATE_FALLBACK:
 599         return TLS1_AD_INAPPROPRIATE_FALLBACK;
 600     case SSL_AD_NO_APPLICATION_PROTOCOL:
 601         return TLS1_AD_NO_APPLICATION_PROTOCOL;
 602     case SSL_AD_CERTIFICATE_REQUIRED:
 603         return SSL_AD_HANDSHAKE_FAILURE;
 604     case TLS13_AD_MISSING_EXTENSION:
 605         return SSL_AD_HANDSHAKE_FAILURE;
 606     default:
 607         return -1;
 608     }
 609 }