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, SSL_F_TLS1_PRF,
44 ERR_R_INTERNAL_ERROR);
46 SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
49 kdf = EVP_KDF_fetch(s->ctx->libctx, OSSL_KDF_NAME_TLS1_PRF, s->ctx->propq);
52 kctx = EVP_KDF_CTX_new(kdf);
56 mdname = EVP_MD_name(md);
57 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
59 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET,
62 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
63 (void *)seed1, (size_t)seed1_len);
64 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
65 (void *)seed2, (size_t)seed2_len);
66 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
67 (void *)seed3, (size_t)seed3_len);
68 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
69 (void *)seed4, (size_t)seed4_len);
70 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED,
71 (void *)seed5, (size_t)seed5_len);
72 *p = OSSL_PARAM_construct_end();
73 if (EVP_KDF_CTX_set_params(kctx, params)
74 && EVP_KDF_derive(kctx, out, olen)) {
75 EVP_KDF_CTX_free(kctx);
81 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
82 ERR_R_INTERNAL_ERROR);
84 SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
85 EVP_KDF_CTX_free(kctx);
89 static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num)
93 /* Calls SSLfatal() as required */
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);
104 #ifndef OPENSSL_NO_KTLS
106 * Count the number of records that were not processed yet from record boundary.
108 * This function assumes that there are only fully formed records read in the
109 * record layer. If read_ahead is enabled, then this might be false and this
110 * function will fail.
112 # ifndef OPENSSL_NO_KTLS_RX
113 static int count_unprocessed_records(SSL *s)
115 SSL3_BUFFER *rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
119 if (!PACKET_buf_init(&pkt, rbuf->buf + rbuf->offset, rbuf->left))
122 while (PACKET_remaining(&pkt) > 0) {
123 /* Skip record type and version */
124 if (!PACKET_forward(&pkt, 3))
127 /* Read until next record */
128 if (PACKET_get_length_prefixed_2(&pkt, &subpkt))
140 int tls_provider_set_tls_params(SSL *s, EVP_CIPHER_CTX *ctx,
141 const EVP_CIPHER *ciph,
145 * Provided cipher, the TLS padding/MAC removal is performed provider
146 * side so we need to tell the ctx about our TLS version and mac size
148 OSSL_PARAM params[3], *pprm = params;
152 if ((EVP_CIPHER_flags(ciph) & EVP_CIPH_FLAG_AEAD_CIPHER) == 0
154 * We look at s->ext.use_etm instead of SSL_READ_ETM() or
155 * SSL_WRITE_ETM() because this test applies to both reading
159 imacsize = EVP_MD_size(md);
161 macsize = (size_t)imacsize;
163 *pprm++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION,
165 *pprm++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE,
167 *pprm = OSSL_PARAM_construct_end();
169 if (!EVP_CIPHER_CTX_set_params(ctx, params)) {
170 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
171 ERR_R_INTERNAL_ERROR);
179 static int tls_iv_length_within_key_block(const EVP_CIPHER *c)
181 /* If GCM/CCM mode only part of IV comes from PRF */
182 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
183 return EVP_GCM_TLS_FIXED_IV_LEN;
184 else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
185 return EVP_CCM_TLS_FIXED_IV_LEN;
187 return EVP_CIPHER_iv_length(c);
190 int tls1_change_cipher_state(SSL *s, int which)
192 unsigned char *p, *mac_secret;
193 unsigned char *ms, *key, *iv;
196 #ifndef OPENSSL_NO_COMP
197 const SSL_COMP *comp;
201 size_t *mac_secret_size;
204 size_t n, i, j, k, cl;
206 #ifndef OPENSSL_NO_KTLS
207 ktls_crypto_info_t crypto_info;
208 unsigned char *rec_seq;
210 # ifndef OPENSSL_NO_KTLS_RX
211 int count_unprocessed;
217 c = s->s3.tmp.new_sym_enc;
218 m = s->s3.tmp.new_hash;
219 mac_type = s->s3.tmp.new_mac_pkey_type;
220 #ifndef OPENSSL_NO_COMP
221 comp = s->s3.tmp.new_compression;
224 if (which & SSL3_CC_READ) {
226 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
228 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
230 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
231 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
233 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
235 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
236 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
238 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
240 if (s->enc_read_ctx != NULL) {
242 } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
243 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
244 ERR_R_MALLOC_FAILURE);
248 * make sure it's initialised in case we exit later with an error
250 EVP_CIPHER_CTX_reset(s->enc_read_ctx);
252 dd = s->enc_read_ctx;
253 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
254 if (mac_ctx == NULL) {
255 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
256 ERR_R_INTERNAL_ERROR);
259 #ifndef OPENSSL_NO_COMP
260 COMP_CTX_free(s->expand);
263 s->expand = COMP_CTX_new(comp->method);
264 if (s->expand == NULL) {
265 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
266 SSL_F_TLS1_CHANGE_CIPHER_STATE,
267 SSL_R_COMPRESSION_LIBRARY_ERROR);
273 * this is done by dtls1_reset_seq_numbers for DTLS
276 RECORD_LAYER_reset_read_sequence(&s->rlayer);
277 mac_secret = &(s->s3.read_mac_secret[0]);
278 mac_secret_size = &(s->s3.read_mac_secret_size);
280 s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
282 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
284 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
286 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
287 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
289 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
291 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
292 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
294 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
295 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
297 } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
298 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
299 ERR_R_MALLOC_FAILURE);
302 dd = s->enc_write_ctx;
303 if (SSL_IS_DTLS(s)) {
304 mac_ctx = EVP_MD_CTX_new();
305 if (mac_ctx == NULL) {
306 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
307 SSL_F_TLS1_CHANGE_CIPHER_STATE,
308 ERR_R_MALLOC_FAILURE);
311 s->write_hash = mac_ctx;
313 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
314 if (mac_ctx == NULL) {
315 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
316 SSL_F_TLS1_CHANGE_CIPHER_STATE,
317 ERR_R_MALLOC_FAILURE);
321 #ifndef OPENSSL_NO_COMP
322 COMP_CTX_free(s->compress);
325 s->compress = COMP_CTX_new(comp->method);
326 if (s->compress == NULL) {
327 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
328 SSL_F_TLS1_CHANGE_CIPHER_STATE,
329 SSL_R_COMPRESSION_LIBRARY_ERROR);
335 * this is done by dtls1_reset_seq_numbers for DTLS
338 RECORD_LAYER_reset_write_sequence(&s->rlayer);
339 mac_secret = &(s->s3.write_mac_secret[0]);
340 mac_secret_size = &(s->s3.write_mac_secret_size);
344 EVP_CIPHER_CTX_reset(dd);
346 p = s->s3.tmp.key_block;
347 i = *mac_secret_size = s->s3.tmp.new_mac_secret_size;
349 /* TODO(size_t): convert me */
350 cl = EVP_CIPHER_key_length(c);
352 k = tls_iv_length_within_key_block(c);
353 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
354 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
371 if (n > s->s3.tmp.key_block_length) {
372 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
373 ERR_R_INTERNAL_ERROR);
377 memcpy(mac_secret, ms, i);
379 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
380 if (mac_type == EVP_PKEY_HMAC) {
381 mac_key = EVP_PKEY_new_raw_private_key_ex(s->ctx->libctx, "HMAC",
382 s->ctx->propq, mac_secret,
386 * If its not HMAC then the only other types of MAC we support are
387 * the GOST MACs, so we need to use the old style way of creating
390 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
391 (int)*mac_secret_size);
394 || EVP_DigestSignInit_ex(mac_ctx, NULL, EVP_MD_name(m),
395 s->ctx->libctx, s->ctx->propq, mac_key) <= 0) {
396 EVP_PKEY_free(mac_key);
397 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
398 ERR_R_INTERNAL_ERROR);
401 EVP_PKEY_free(mac_key);
404 OSSL_TRACE_BEGIN(TLS) {
405 BIO_printf(trc_out, "which = %04X, mac key:\n", which);
406 BIO_dump_indent(trc_out, ms, i, 4);
407 } OSSL_TRACE_END(TLS);
409 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
410 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
411 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
413 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
414 ERR_R_INTERNAL_ERROR);
417 } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
420 new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
421 taglen = EVP_CCM8_TLS_TAG_LEN;
423 taglen = EVP_CCM_TLS_TAG_LEN;
424 if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
425 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
426 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
427 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
428 || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
429 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
430 ERR_R_INTERNAL_ERROR);
434 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
435 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
436 ERR_R_INTERNAL_ERROR);
440 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
441 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
442 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
443 (int)*mac_secret_size, mac_secret)) {
444 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
445 ERR_R_INTERNAL_ERROR);
448 if (EVP_CIPHER_provider(c) != NULL
449 && !tls_provider_set_tls_params(s, dd, c, m)) {
450 /* SSLfatal already called */
454 #ifndef OPENSSL_NO_KTLS
458 if (((which & SSL3_CC_READ) && (s->mode & SSL_MODE_NO_KTLS_RX))
459 || ((which & SSL3_CC_WRITE) && (s->mode & SSL_MODE_NO_KTLS_TX)))
462 /* ktls supports only the maximum fragment size */
463 if (ssl_get_max_send_fragment(s) != SSL3_RT_MAX_PLAIN_LENGTH)
466 /* check that cipher is supported */
467 if (!ktls_check_supported_cipher(s, c, dd))
470 if (which & SSL3_CC_WRITE)
475 if (!ossl_assert(bio != NULL)) {
476 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
477 ERR_R_INTERNAL_ERROR);
481 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
482 if (which & SSL3_CC_WRITE) {
483 if (BIO_flush(bio) <= 0)
487 /* ktls doesn't support renegotiation */
488 if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
489 (BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
490 SSLfatal(s, SSL_AD_NO_RENEGOTIATION, SSL_F_TLS1_CHANGE_CIPHER_STATE,
491 ERR_R_INTERNAL_ERROR);
495 if (which & SSL3_CC_WRITE)
496 rl_sequence = RECORD_LAYER_get_write_sequence(&s->rlayer);
498 rl_sequence = RECORD_LAYER_get_read_sequence(&s->rlayer);
500 if (!ktls_configure_crypto(s, c, dd, rl_sequence, &crypto_info, &rec_seq,
501 iv, key, ms, *mac_secret_size))
504 if (which & SSL3_CC_READ) {
505 # ifndef OPENSSL_NO_KTLS_RX
506 count_unprocessed = count_unprocessed_records(s);
507 if (count_unprocessed < 0)
510 /* increment the crypto_info record sequence */
511 while (count_unprocessed) {
512 for (bit = 7; bit >= 0; bit--) { /* increment */
514 if (rec_seq[bit] != 0)
524 /* ktls works with user provided buffers directly */
525 if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
526 if (which & SSL3_CC_WRITE)
527 ssl3_release_write_buffer(s);
528 SSL_set_options(s, SSL_OP_NO_RENEGOTIATION);
532 #endif /* OPENSSL_NO_KTLS */
533 s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
535 OSSL_TRACE_BEGIN(TLS) {
536 BIO_printf(trc_out, "which = %04X, key:\n", which);
537 BIO_dump_indent(trc_out, key, EVP_CIPHER_key_length(c), 4);
538 BIO_printf(trc_out, "iv:\n");
539 BIO_dump_indent(trc_out, iv, k, 4);
540 } OSSL_TRACE_END(TLS);
547 int tls1_setup_key_block(SSL *s)
553 int mac_type = NID_undef;
554 size_t num, mac_secret_size = 0;
557 if (s->s3.tmp.key_block_length != 0)
560 if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, &mac_type,
561 &mac_secret_size, &comp, s->ext.use_etm)) {
562 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
563 SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
567 ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
568 s->s3.tmp.new_sym_enc = c;
569 ssl_evp_md_free(s->s3.tmp.new_hash);
570 s->s3.tmp.new_hash = hash;
571 s->s3.tmp.new_mac_pkey_type = mac_type;
572 s->s3.tmp.new_mac_secret_size = mac_secret_size;
573 num = mac_secret_size + EVP_CIPHER_key_length(c) + tls_iv_length_within_key_block(c);
576 ssl3_cleanup_key_block(s);
578 if ((p = OPENSSL_malloc(num)) == NULL) {
579 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
580 ERR_R_MALLOC_FAILURE);
584 s->s3.tmp.key_block_length = num;
585 s->s3.tmp.key_block = p;
587 OSSL_TRACE_BEGIN(TLS) {
588 BIO_printf(trc_out, "key block length: %ld\n", num);
589 BIO_printf(trc_out, "client random\n");
590 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
591 BIO_printf(trc_out, "server random\n");
592 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
593 BIO_printf(trc_out, "master key\n");
594 BIO_dump_indent(trc_out,
595 s->session->master_key,
596 s->session->master_key_length, 4);
597 } OSSL_TRACE_END(TLS);
599 if (!tls1_generate_key_block(s, p, num)) {
600 /* SSLfatal() already called */
604 OSSL_TRACE_BEGIN(TLS) {
605 BIO_printf(trc_out, "key block\n");
606 BIO_dump_indent(trc_out, p, num, 4);
607 } OSSL_TRACE_END(TLS);
609 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
610 && s->method->version <= TLS1_VERSION) {
612 * enable vulnerability countermeasure for CBC ciphers with known-IV
613 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
615 s->s3.need_empty_fragments = 1;
617 if (s->session->cipher != NULL) {
618 if (s->session->cipher->algorithm_enc == SSL_eNULL)
619 s->s3.need_empty_fragments = 0;
621 #ifndef OPENSSL_NO_RC4
622 if (s->session->cipher->algorithm_enc == SSL_RC4)
623 s->s3.need_empty_fragments = 0;
633 size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
637 unsigned char hash[EVP_MAX_MD_SIZE];
638 size_t finished_size = TLS1_FINISH_MAC_LENGTH;
640 if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kGOST18)
643 if (!ssl3_digest_cached_records(s, 0)) {
644 /* SSLfatal() already called */
648 if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
649 /* SSLfatal() already called */
653 if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
654 s->session->master_key, s->session->master_key_length,
655 out, finished_size, 1)) {
656 /* SSLfatal() already called */
659 OPENSSL_cleanse(hash, hashlen);
660 return finished_size;
663 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
664 size_t len, size_t *secret_size)
666 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
667 unsigned char hash[EVP_MAX_MD_SIZE * 2];
670 * Digest cached records keeping record buffer (if present): this won't
671 * affect client auth because we're freezing the buffer at the same
672 * point (after client key exchange and before certificate verify)
674 if (!ssl3_digest_cached_records(s, 1)
675 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
676 /* SSLfatal() already called */
679 OSSL_TRACE_BEGIN(TLS) {
680 BIO_printf(trc_out, "Handshake hashes:\n");
681 BIO_dump(trc_out, (char *)hash, hashlen);
682 } OSSL_TRACE_END(TLS);
684 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
685 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
689 NULL, 0, p, len, out,
690 SSL3_MASTER_SECRET_SIZE, 1)) {
691 /* SSLfatal() already called */
694 OPENSSL_cleanse(hash, hashlen);
697 TLS_MD_MASTER_SECRET_CONST,
698 TLS_MD_MASTER_SECRET_CONST_SIZE,
699 s->s3.client_random, SSL3_RANDOM_SIZE,
701 s->s3.server_random, SSL3_RANDOM_SIZE,
702 NULL, 0, p, len, out,
703 SSL3_MASTER_SECRET_SIZE, 1)) {
704 /* SSLfatal() already called */
709 OSSL_TRACE_BEGIN(TLS) {
710 BIO_printf(trc_out, "Premaster Secret:\n");
711 BIO_dump_indent(trc_out, p, len, 4);
712 BIO_printf(trc_out, "Client Random:\n");
713 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
714 BIO_printf(trc_out, "Server Random:\n");
715 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
716 BIO_printf(trc_out, "Master Secret:\n");
717 BIO_dump_indent(trc_out,
718 s->session->master_key,
719 SSL3_MASTER_SECRET_SIZE, 4);
720 } OSSL_TRACE_END(TLS);
722 *secret_size = SSL3_MASTER_SECRET_SIZE;
726 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
727 const char *label, size_t llen,
728 const unsigned char *context,
729 size_t contextlen, int use_context)
731 unsigned char *val = NULL;
732 size_t vallen = 0, currentvalpos;
736 * construct PRF arguments we construct the PRF argument ourself rather
737 * than passing separate values into the TLS PRF to ensure that the
738 * concatenation of values does not create a prohibited label.
740 vallen = llen + SSL3_RANDOM_SIZE * 2;
742 vallen += 2 + contextlen;
745 val = OPENSSL_malloc(vallen);
749 memcpy(val + currentvalpos, (unsigned char *)label, llen);
750 currentvalpos += llen;
751 memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
752 currentvalpos += SSL3_RANDOM_SIZE;
753 memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
754 currentvalpos += SSL3_RANDOM_SIZE;
757 val[currentvalpos] = (contextlen >> 8) & 0xff;
759 val[currentvalpos] = contextlen & 0xff;
761 if ((contextlen > 0) || (context != NULL)) {
762 memcpy(val + currentvalpos, context, contextlen);
767 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
768 * label len) = 15, so size of val > max(prohibited label len) = 15 and
769 * the comparisons won't have buffer overflow
771 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
772 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
774 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
775 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
777 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
778 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
780 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
781 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
783 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
784 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
793 s->session->master_key, s->session->master_key_length,
798 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
802 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
805 OPENSSL_clear_free(val, vallen);
809 int tls1_alert_code(int code)
812 case SSL_AD_CLOSE_NOTIFY:
813 return SSL3_AD_CLOSE_NOTIFY;
814 case SSL_AD_UNEXPECTED_MESSAGE:
815 return SSL3_AD_UNEXPECTED_MESSAGE;
816 case SSL_AD_BAD_RECORD_MAC:
817 return SSL3_AD_BAD_RECORD_MAC;
818 case SSL_AD_DECRYPTION_FAILED:
819 return TLS1_AD_DECRYPTION_FAILED;
820 case SSL_AD_RECORD_OVERFLOW:
821 return TLS1_AD_RECORD_OVERFLOW;
822 case SSL_AD_DECOMPRESSION_FAILURE:
823 return SSL3_AD_DECOMPRESSION_FAILURE;
824 case SSL_AD_HANDSHAKE_FAILURE:
825 return SSL3_AD_HANDSHAKE_FAILURE;
826 case SSL_AD_NO_CERTIFICATE:
828 case SSL_AD_BAD_CERTIFICATE:
829 return SSL3_AD_BAD_CERTIFICATE;
830 case SSL_AD_UNSUPPORTED_CERTIFICATE:
831 return SSL3_AD_UNSUPPORTED_CERTIFICATE;
832 case SSL_AD_CERTIFICATE_REVOKED:
833 return SSL3_AD_CERTIFICATE_REVOKED;
834 case SSL_AD_CERTIFICATE_EXPIRED:
835 return SSL3_AD_CERTIFICATE_EXPIRED;
836 case SSL_AD_CERTIFICATE_UNKNOWN:
837 return SSL3_AD_CERTIFICATE_UNKNOWN;
838 case SSL_AD_ILLEGAL_PARAMETER:
839 return SSL3_AD_ILLEGAL_PARAMETER;
840 case SSL_AD_UNKNOWN_CA:
841 return TLS1_AD_UNKNOWN_CA;
842 case SSL_AD_ACCESS_DENIED:
843 return TLS1_AD_ACCESS_DENIED;
844 case SSL_AD_DECODE_ERROR:
845 return TLS1_AD_DECODE_ERROR;
846 case SSL_AD_DECRYPT_ERROR:
847 return TLS1_AD_DECRYPT_ERROR;
848 case SSL_AD_EXPORT_RESTRICTION:
849 return TLS1_AD_EXPORT_RESTRICTION;
850 case SSL_AD_PROTOCOL_VERSION:
851 return TLS1_AD_PROTOCOL_VERSION;
852 case SSL_AD_INSUFFICIENT_SECURITY:
853 return TLS1_AD_INSUFFICIENT_SECURITY;
854 case SSL_AD_INTERNAL_ERROR:
855 return TLS1_AD_INTERNAL_ERROR;
856 case SSL_AD_USER_CANCELLED:
857 return TLS1_AD_USER_CANCELLED;
858 case SSL_AD_NO_RENEGOTIATION:
859 return TLS1_AD_NO_RENEGOTIATION;
860 case SSL_AD_UNSUPPORTED_EXTENSION:
861 return TLS1_AD_UNSUPPORTED_EXTENSION;
862 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
863 return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
864 case SSL_AD_UNRECOGNIZED_NAME:
865 return TLS1_AD_UNRECOGNIZED_NAME;
866 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
867 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
868 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
869 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
870 case SSL_AD_UNKNOWN_PSK_IDENTITY:
871 return TLS1_AD_UNKNOWN_PSK_IDENTITY;
872 case SSL_AD_INAPPROPRIATE_FALLBACK:
873 return TLS1_AD_INAPPROPRIATE_FALLBACK;
874 case SSL_AD_NO_APPLICATION_PROTOCOL:
875 return TLS1_AD_NO_APPLICATION_PROTOCOL;
876 case SSL_AD_CERTIFICATE_REQUIRED:
877 return SSL_AD_HANDSHAKE_FAILURE;