2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright 2005 Nokia. All rights reserved.
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
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>
24 /* seed1 through seed5 are concatenated */
25 static int tls1_PRF(SSL *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)
34 const EVP_MD *md = ssl_prf_md(s);
36 EVP_KDF_CTX *kctx = NULL;
37 OSSL_PARAM params[8], *p = params;
41 /* Should never happen */
43 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
45 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
48 kdf = EVP_KDF_fetch(s->ctx->libctx, OSSL_KDF_NAME_TLS1_PRF, s->ctx->propq);
51 kctx = EVP_KDF_CTX_new(kdf);
55 mdname = EVP_MD_name(md);
56 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
58 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET,
61 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
62 (void *)seed1, (size_t)seed1_len);
63 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
64 (void *)seed2, (size_t)seed2_len);
65 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
66 (void *)seed3, (size_t)seed3_len);
67 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
68 (void *)seed4, (size_t)seed4_len);
69 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
70 (void *)seed5, (size_t)seed5_len);
71 *p = OSSL_PARAM_construct_end();
72 if (EVP_KDF_CTX_set_params(kctx, params)
73 && EVP_KDF_derive(kctx, out, olen)) {
74 EVP_KDF_CTX_free(kctx);
80 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
82 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
83 EVP_KDF_CTX_free(kctx);
87 static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num)
91 /* Calls SSLfatal() as required */
93 TLS_MD_KEY_EXPANSION_CONST,
94 TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3.server_random,
95 SSL3_RANDOM_SIZE, s->s3.client_random, SSL3_RANDOM_SIZE,
96 NULL, 0, NULL, 0, s->session->master_key,
97 s->session->master_key_length, km, num, 1);
102 #ifndef OPENSSL_NO_KTLS
104 * Count the number of records that were not processed yet from record boundary.
106 * This function assumes that there are only fully formed records read in the
107 * record layer. If read_ahead is enabled, then this might be false and this
108 * function will fail.
110 # ifndef OPENSSL_NO_KTLS_RX
111 static int count_unprocessed_records(SSL *s)
113 SSL3_BUFFER *rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
117 if (!PACKET_buf_init(&pkt, rbuf->buf + rbuf->offset, rbuf->left))
120 while (PACKET_remaining(&pkt) > 0) {
121 /* Skip record type and version */
122 if (!PACKET_forward(&pkt, 3))
125 /* Read until next record */
126 if (PACKET_get_length_prefixed_2(&pkt, &subpkt))
138 int tls_provider_set_tls_params(SSL *s, EVP_CIPHER_CTX *ctx,
139 const EVP_CIPHER *ciph,
143 * Provided cipher, the TLS padding/MAC removal is performed provider
144 * side so we need to tell the ctx about our TLS version and mac size
146 OSSL_PARAM params[3], *pprm = params;
150 if ((EVP_CIPHER_flags(ciph) & EVP_CIPH_FLAG_AEAD_CIPHER) == 0
152 * We look at s->ext.use_etm instead of SSL_READ_ETM() or
153 * SSL_WRITE_ETM() because this test applies to both reading
157 imacsize = EVP_MD_size(md);
159 macsize = (size_t)imacsize;
161 *pprm++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION,
163 *pprm++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE,
165 *pprm = OSSL_PARAM_construct_end();
167 if (!EVP_CIPHER_CTX_set_params(ctx, params)) {
168 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
176 static int tls_iv_length_within_key_block(const EVP_CIPHER *c)
178 /* If GCM/CCM mode only part of IV comes from PRF */
179 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
180 return EVP_GCM_TLS_FIXED_IV_LEN;
181 else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
182 return EVP_CCM_TLS_FIXED_IV_LEN;
184 return EVP_CIPHER_iv_length(c);
187 int tls1_change_cipher_state(SSL *s, int which)
189 unsigned char *p, *mac_secret;
190 unsigned char *ms, *key, *iv;
193 #ifndef OPENSSL_NO_COMP
194 const SSL_COMP *comp;
198 size_t *mac_secret_size;
201 size_t n, i, j, k, cl;
203 #ifndef OPENSSL_NO_KTLS
204 ktls_crypto_info_t crypto_info;
205 unsigned char *rec_seq;
207 # ifndef OPENSSL_NO_KTLS_RX
208 int count_unprocessed;
214 c = s->s3.tmp.new_sym_enc;
215 m = s->s3.tmp.new_hash;
216 mac_type = s->s3.tmp.new_mac_pkey_type;
217 #ifndef OPENSSL_NO_COMP
218 comp = s->s3.tmp.new_compression;
221 if (which & SSL3_CC_READ) {
223 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
225 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
227 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
228 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
230 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
232 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
233 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
235 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
237 if (s->enc_read_ctx != NULL) {
239 } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
240 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
244 * make sure it's initialised in case we exit later with an error
246 EVP_CIPHER_CTX_reset(s->enc_read_ctx);
248 dd = s->enc_read_ctx;
249 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
250 if (mac_ctx == NULL) {
251 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
254 #ifndef OPENSSL_NO_COMP
255 COMP_CTX_free(s->expand);
258 s->expand = COMP_CTX_new(comp->method);
259 if (s->expand == NULL) {
260 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
261 SSL_R_COMPRESSION_LIBRARY_ERROR);
267 * this is done by dtls1_reset_seq_numbers for DTLS
270 RECORD_LAYER_reset_read_sequence(&s->rlayer);
271 mac_secret = &(s->s3.read_mac_secret[0]);
272 mac_secret_size = &(s->s3.read_mac_secret_size);
274 s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
276 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
278 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
280 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
281 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
283 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
285 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
286 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
288 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
289 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
291 } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
292 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
295 dd = s->enc_write_ctx;
296 if (SSL_IS_DTLS(s)) {
297 mac_ctx = EVP_MD_CTX_new();
298 if (mac_ctx == NULL) {
299 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
302 s->write_hash = mac_ctx;
304 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
305 if (mac_ctx == NULL) {
306 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
310 #ifndef OPENSSL_NO_COMP
311 COMP_CTX_free(s->compress);
314 s->compress = COMP_CTX_new(comp->method);
315 if (s->compress == NULL) {
316 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
317 SSL_R_COMPRESSION_LIBRARY_ERROR);
323 * this is done by dtls1_reset_seq_numbers for DTLS
326 RECORD_LAYER_reset_write_sequence(&s->rlayer);
327 mac_secret = &(s->s3.write_mac_secret[0]);
328 mac_secret_size = &(s->s3.write_mac_secret_size);
332 EVP_CIPHER_CTX_reset(dd);
334 p = s->s3.tmp.key_block;
335 i = *mac_secret_size = s->s3.tmp.new_mac_secret_size;
337 /* TODO(size_t): convert me */
338 cl = EVP_CIPHER_key_length(c);
340 k = tls_iv_length_within_key_block(c);
341 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
342 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
359 if (n > s->s3.tmp.key_block_length) {
360 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
364 memcpy(mac_secret, ms, i);
366 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
367 if (mac_type == EVP_PKEY_HMAC) {
368 mac_key = EVP_PKEY_new_raw_private_key_ex(s->ctx->libctx, "HMAC",
369 s->ctx->propq, mac_secret,
373 * If its not HMAC then the only other types of MAC we support are
374 * the GOST MACs, so we need to use the old style way of creating
377 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
378 (int)*mac_secret_size);
381 || EVP_DigestSignInit_ex(mac_ctx, NULL, EVP_MD_name(m),
382 s->ctx->libctx, s->ctx->propq, mac_key) <= 0) {
383 EVP_PKEY_free(mac_key);
384 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
387 EVP_PKEY_free(mac_key);
390 OSSL_TRACE_BEGIN(TLS) {
391 BIO_printf(trc_out, "which = %04X, mac key:\n", which);
392 BIO_dump_indent(trc_out, ms, i, 4);
393 } OSSL_TRACE_END(TLS);
395 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
396 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
397 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
399 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
402 } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
405 new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
406 taglen = EVP_CCM8_TLS_TAG_LEN;
408 taglen = EVP_CCM_TLS_TAG_LEN;
409 if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
410 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
411 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
412 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
413 || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
414 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
418 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
419 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
423 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
424 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
425 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
426 (int)*mac_secret_size, mac_secret)) {
427 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
430 if (EVP_CIPHER_provider(c) != NULL
431 && !tls_provider_set_tls_params(s, dd, c, m)) {
432 /* SSLfatal already called */
436 #ifndef OPENSSL_NO_KTLS
440 if (((which & SSL3_CC_READ) && (s->mode & SSL_MODE_NO_KTLS_RX))
441 || ((which & SSL3_CC_WRITE) && (s->mode & SSL_MODE_NO_KTLS_TX)))
444 /* ktls supports only the maximum fragment size */
445 if (ssl_get_max_send_fragment(s) != SSL3_RT_MAX_PLAIN_LENGTH)
448 /* check that cipher is supported */
449 if (!ktls_check_supported_cipher(s, c, dd))
452 if (which & SSL3_CC_WRITE)
457 if (!ossl_assert(bio != NULL)) {
458 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
462 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
463 if (which & SSL3_CC_WRITE) {
464 if (BIO_flush(bio) <= 0)
468 /* ktls doesn't support renegotiation */
469 if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
470 (BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
471 SSLfatal(s, SSL_AD_NO_RENEGOTIATION, ERR_R_INTERNAL_ERROR);
475 if (which & SSL3_CC_WRITE)
476 rl_sequence = RECORD_LAYER_get_write_sequence(&s->rlayer);
478 rl_sequence = RECORD_LAYER_get_read_sequence(&s->rlayer);
480 if (!ktls_configure_crypto(s, c, dd, rl_sequence, &crypto_info, &rec_seq,
481 iv, key, ms, *mac_secret_size))
484 if (which & SSL3_CC_READ) {
485 # ifndef OPENSSL_NO_KTLS_RX
486 count_unprocessed = count_unprocessed_records(s);
487 if (count_unprocessed < 0)
490 /* increment the crypto_info record sequence */
491 while (count_unprocessed) {
492 for (bit = 7; bit >= 0; bit--) { /* increment */
494 if (rec_seq[bit] != 0)
504 /* ktls works with user provided buffers directly */
505 if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
506 if (which & SSL3_CC_WRITE)
507 ssl3_release_write_buffer(s);
508 SSL_set_options(s, SSL_OP_NO_RENEGOTIATION);
512 #endif /* OPENSSL_NO_KTLS */
513 s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
515 OSSL_TRACE_BEGIN(TLS) {
516 BIO_printf(trc_out, "which = %04X, key:\n", which);
517 BIO_dump_indent(trc_out, key, EVP_CIPHER_key_length(c), 4);
518 BIO_printf(trc_out, "iv:\n");
519 BIO_dump_indent(trc_out, iv, k, 4);
520 } OSSL_TRACE_END(TLS);
527 int tls1_setup_key_block(SSL *s)
533 int mac_type = NID_undef;
534 size_t num, mac_secret_size = 0;
537 if (s->s3.tmp.key_block_length != 0)
540 if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, &mac_type,
541 &mac_secret_size, &comp, s->ext.use_etm)) {
542 /* Error is already recorded */
543 SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR);
547 ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
548 s->s3.tmp.new_sym_enc = c;
549 ssl_evp_md_free(s->s3.tmp.new_hash);
550 s->s3.tmp.new_hash = hash;
551 s->s3.tmp.new_mac_pkey_type = mac_type;
552 s->s3.tmp.new_mac_secret_size = mac_secret_size;
553 num = mac_secret_size + EVP_CIPHER_key_length(c) + tls_iv_length_within_key_block(c);
556 ssl3_cleanup_key_block(s);
558 if ((p = OPENSSL_malloc(num)) == NULL) {
559 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
563 s->s3.tmp.key_block_length = num;
564 s->s3.tmp.key_block = p;
566 OSSL_TRACE_BEGIN(TLS) {
567 BIO_printf(trc_out, "key block length: %ld\n", num);
568 BIO_printf(trc_out, "client random\n");
569 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
570 BIO_printf(trc_out, "server random\n");
571 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
572 BIO_printf(trc_out, "master key\n");
573 BIO_dump_indent(trc_out,
574 s->session->master_key,
575 s->session->master_key_length, 4);
576 } OSSL_TRACE_END(TLS);
578 if (!tls1_generate_key_block(s, p, num)) {
579 /* SSLfatal() already called */
583 OSSL_TRACE_BEGIN(TLS) {
584 BIO_printf(trc_out, "key block\n");
585 BIO_dump_indent(trc_out, p, num, 4);
586 } OSSL_TRACE_END(TLS);
588 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
589 && s->method->version <= TLS1_VERSION) {
591 * enable vulnerability countermeasure for CBC ciphers with known-IV
592 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
594 s->s3.need_empty_fragments = 1;
596 if (s->session->cipher != NULL) {
597 if (s->session->cipher->algorithm_enc == SSL_eNULL)
598 s->s3.need_empty_fragments = 0;
600 #ifndef OPENSSL_NO_RC4
601 if (s->session->cipher->algorithm_enc == SSL_RC4)
602 s->s3.need_empty_fragments = 0;
612 size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
616 unsigned char hash[EVP_MAX_MD_SIZE];
617 size_t finished_size = TLS1_FINISH_MAC_LENGTH;
619 if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kGOST18)
622 if (!ssl3_digest_cached_records(s, 0)) {
623 /* SSLfatal() already called */
627 if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
628 /* SSLfatal() already called */
632 if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
633 s->session->master_key, s->session->master_key_length,
634 out, finished_size, 1)) {
635 /* SSLfatal() already called */
638 OPENSSL_cleanse(hash, hashlen);
639 return finished_size;
642 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
643 size_t len, size_t *secret_size)
645 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
646 unsigned char hash[EVP_MAX_MD_SIZE * 2];
649 * Digest cached records keeping record buffer (if present): this won't
650 * affect client auth because we're freezing the buffer at the same
651 * point (after client key exchange and before certificate verify)
653 if (!ssl3_digest_cached_records(s, 1)
654 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
655 /* SSLfatal() already called */
658 OSSL_TRACE_BEGIN(TLS) {
659 BIO_printf(trc_out, "Handshake hashes:\n");
660 BIO_dump(trc_out, (char *)hash, hashlen);
661 } OSSL_TRACE_END(TLS);
663 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
664 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
668 NULL, 0, p, len, out,
669 SSL3_MASTER_SECRET_SIZE, 1)) {
670 /* SSLfatal() already called */
673 OPENSSL_cleanse(hash, hashlen);
676 TLS_MD_MASTER_SECRET_CONST,
677 TLS_MD_MASTER_SECRET_CONST_SIZE,
678 s->s3.client_random, SSL3_RANDOM_SIZE,
680 s->s3.server_random, SSL3_RANDOM_SIZE,
681 NULL, 0, p, len, out,
682 SSL3_MASTER_SECRET_SIZE, 1)) {
683 /* SSLfatal() already called */
688 OSSL_TRACE_BEGIN(TLS) {
689 BIO_printf(trc_out, "Premaster Secret:\n");
690 BIO_dump_indent(trc_out, p, len, 4);
691 BIO_printf(trc_out, "Client Random:\n");
692 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
693 BIO_printf(trc_out, "Server Random:\n");
694 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
695 BIO_printf(trc_out, "Master Secret:\n");
696 BIO_dump_indent(trc_out,
697 s->session->master_key,
698 SSL3_MASTER_SECRET_SIZE, 4);
699 } OSSL_TRACE_END(TLS);
701 *secret_size = SSL3_MASTER_SECRET_SIZE;
705 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
706 const char *label, size_t llen,
707 const unsigned char *context,
708 size_t contextlen, int use_context)
710 unsigned char *val = NULL;
711 size_t vallen = 0, currentvalpos;
715 * construct PRF arguments we construct the PRF argument ourself rather
716 * than passing separate values into the TLS PRF to ensure that the
717 * concatenation of values does not create a prohibited label.
719 vallen = llen + SSL3_RANDOM_SIZE * 2;
721 vallen += 2 + contextlen;
724 val = OPENSSL_malloc(vallen);
728 memcpy(val + currentvalpos, (unsigned char *)label, llen);
729 currentvalpos += llen;
730 memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
731 currentvalpos += SSL3_RANDOM_SIZE;
732 memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
733 currentvalpos += SSL3_RANDOM_SIZE;
736 val[currentvalpos] = (contextlen >> 8) & 0xff;
738 val[currentvalpos] = contextlen & 0xff;
740 if ((contextlen > 0) || (context != NULL)) {
741 memcpy(val + currentvalpos, context, contextlen);
746 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
747 * label len) = 15, so size of val > max(prohibited label len) = 15 and
748 * the comparisons won't have buffer overflow
750 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
751 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
753 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
754 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
756 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
757 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
759 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
760 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
762 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
763 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
772 s->session->master_key, s->session->master_key_length,
777 ERR_raise(ERR_LIB_SSL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
781 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
784 OPENSSL_clear_free(val, vallen);
788 int tls1_alert_code(int code)
791 case SSL_AD_CLOSE_NOTIFY:
792 return SSL3_AD_CLOSE_NOTIFY;
793 case SSL_AD_UNEXPECTED_MESSAGE:
794 return SSL3_AD_UNEXPECTED_MESSAGE;
795 case SSL_AD_BAD_RECORD_MAC:
796 return SSL3_AD_BAD_RECORD_MAC;
797 case SSL_AD_DECRYPTION_FAILED:
798 return TLS1_AD_DECRYPTION_FAILED;
799 case SSL_AD_RECORD_OVERFLOW:
800 return TLS1_AD_RECORD_OVERFLOW;
801 case SSL_AD_DECOMPRESSION_FAILURE:
802 return SSL3_AD_DECOMPRESSION_FAILURE;
803 case SSL_AD_HANDSHAKE_FAILURE:
804 return SSL3_AD_HANDSHAKE_FAILURE;
805 case SSL_AD_NO_CERTIFICATE:
807 case SSL_AD_BAD_CERTIFICATE:
808 return SSL3_AD_BAD_CERTIFICATE;
809 case SSL_AD_UNSUPPORTED_CERTIFICATE:
810 return SSL3_AD_UNSUPPORTED_CERTIFICATE;
811 case SSL_AD_CERTIFICATE_REVOKED:
812 return SSL3_AD_CERTIFICATE_REVOKED;
813 case SSL_AD_CERTIFICATE_EXPIRED:
814 return SSL3_AD_CERTIFICATE_EXPIRED;
815 case SSL_AD_CERTIFICATE_UNKNOWN:
816 return SSL3_AD_CERTIFICATE_UNKNOWN;
817 case SSL_AD_ILLEGAL_PARAMETER:
818 return SSL3_AD_ILLEGAL_PARAMETER;
819 case SSL_AD_UNKNOWN_CA:
820 return TLS1_AD_UNKNOWN_CA;
821 case SSL_AD_ACCESS_DENIED:
822 return TLS1_AD_ACCESS_DENIED;
823 case SSL_AD_DECODE_ERROR:
824 return TLS1_AD_DECODE_ERROR;
825 case SSL_AD_DECRYPT_ERROR:
826 return TLS1_AD_DECRYPT_ERROR;
827 case SSL_AD_EXPORT_RESTRICTION:
828 return TLS1_AD_EXPORT_RESTRICTION;
829 case SSL_AD_PROTOCOL_VERSION:
830 return TLS1_AD_PROTOCOL_VERSION;
831 case SSL_AD_INSUFFICIENT_SECURITY:
832 return TLS1_AD_INSUFFICIENT_SECURITY;
833 case SSL_AD_INTERNAL_ERROR:
834 return TLS1_AD_INTERNAL_ERROR;
835 case SSL_AD_USER_CANCELLED:
836 return TLS1_AD_USER_CANCELLED;
837 case SSL_AD_NO_RENEGOTIATION:
838 return TLS1_AD_NO_RENEGOTIATION;
839 case SSL_AD_UNSUPPORTED_EXTENSION:
840 return TLS1_AD_UNSUPPORTED_EXTENSION;
841 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
842 return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
843 case SSL_AD_UNRECOGNIZED_NAME:
844 return TLS1_AD_UNRECOGNIZED_NAME;
845 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
846 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
847 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
848 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
849 case SSL_AD_UNKNOWN_PSK_IDENTITY:
850 return TLS1_AD_UNKNOWN_PSK_IDENTITY;
851 case SSL_AD_INAPPROPRIATE_FALLBACK:
852 return TLS1_AD_INAPPROPRIATE_FALLBACK;
853 case SSL_AD_NO_APPLICATION_PROTOCOL:
854 return TLS1_AD_NO_APPLICATION_PROTOCOL;
855 case SSL_AD_CERTIFICATE_REQUIRED:
856 return SSL_AD_HANDSHAKE_FAILURE;