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);
178 int tls1_change_cipher_state(SSL *s, int which)
180 unsigned char *p, *mac_secret;
181 unsigned char *ms, *key, *iv;
184 #ifndef OPENSSL_NO_COMP
185 const SSL_COMP *comp;
189 size_t *mac_secret_size;
192 size_t n, i, j, k, cl;
194 #ifndef OPENSSL_NO_KTLS
195 ktls_crypto_info_t crypto_info;
197 unsigned char *rec_seq;
199 # ifndef OPENSSL_NO_KTLS_RX
200 int count_unprocessed;
207 c = s->s3.tmp.new_sym_enc;
208 m = s->s3.tmp.new_hash;
209 mac_type = s->s3.tmp.new_mac_pkey_type;
210 #ifndef OPENSSL_NO_COMP
211 comp = s->s3.tmp.new_compression;
214 if (which & SSL3_CC_READ) {
216 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
218 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
220 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
221 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
223 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
225 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
226 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
228 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
230 if (s->enc_read_ctx != NULL) {
232 } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
233 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
234 ERR_R_MALLOC_FAILURE);
238 * make sure it's initialised in case we exit later with an error
240 EVP_CIPHER_CTX_reset(s->enc_read_ctx);
242 dd = s->enc_read_ctx;
243 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
244 if (mac_ctx == NULL) {
245 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
246 ERR_R_INTERNAL_ERROR);
249 #ifndef OPENSSL_NO_COMP
250 COMP_CTX_free(s->expand);
253 s->expand = COMP_CTX_new(comp->method);
254 if (s->expand == NULL) {
255 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
256 SSL_F_TLS1_CHANGE_CIPHER_STATE,
257 SSL_R_COMPRESSION_LIBRARY_ERROR);
263 * this is done by dtls1_reset_seq_numbers for DTLS
266 RECORD_LAYER_reset_read_sequence(&s->rlayer);
267 mac_secret = &(s->s3.read_mac_secret[0]);
268 mac_secret_size = &(s->s3.read_mac_secret_size);
270 s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
272 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
274 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
276 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
277 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
279 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
281 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
282 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
284 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
285 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
287 } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
288 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
289 ERR_R_MALLOC_FAILURE);
292 dd = s->enc_write_ctx;
293 if (SSL_IS_DTLS(s)) {
294 mac_ctx = EVP_MD_CTX_new();
295 if (mac_ctx == NULL) {
296 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
297 SSL_F_TLS1_CHANGE_CIPHER_STATE,
298 ERR_R_MALLOC_FAILURE);
301 s->write_hash = mac_ctx;
303 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
304 if (mac_ctx == NULL) {
305 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
306 SSL_F_TLS1_CHANGE_CIPHER_STATE,
307 ERR_R_MALLOC_FAILURE);
311 #ifndef OPENSSL_NO_COMP
312 COMP_CTX_free(s->compress);
315 s->compress = COMP_CTX_new(comp->method);
316 if (s->compress == NULL) {
317 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
318 SSL_F_TLS1_CHANGE_CIPHER_STATE,
319 SSL_R_COMPRESSION_LIBRARY_ERROR);
325 * this is done by dtls1_reset_seq_numbers for DTLS
328 RECORD_LAYER_reset_write_sequence(&s->rlayer);
329 mac_secret = &(s->s3.write_mac_secret[0]);
330 mac_secret_size = &(s->s3.write_mac_secret_size);
334 EVP_CIPHER_CTX_reset(dd);
336 p = s->s3.tmp.key_block;
337 i = *mac_secret_size = s->s3.tmp.new_mac_secret_size;
339 /* TODO(size_t): convert me */
340 cl = EVP_CIPHER_key_length(c);
342 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
343 /* If GCM/CCM mode only part of IV comes from PRF */
344 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
345 k = EVP_GCM_TLS_FIXED_IV_LEN;
346 else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
347 k = EVP_CCM_TLS_FIXED_IV_LEN;
349 k = EVP_CIPHER_iv_length(c);
350 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
351 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
368 if (n > s->s3.tmp.key_block_length) {
369 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
370 ERR_R_INTERNAL_ERROR);
374 memcpy(mac_secret, ms, i);
376 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
377 if (mac_type == EVP_PKEY_HMAC) {
378 mac_key = EVP_PKEY_new_raw_private_key_with_libctx(s->ctx->libctx,
385 * If its not HMAC then the only other types of MAC we support are
386 * the GOST MACs, so we need to use the old style way of creating
389 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
390 (int)*mac_secret_size);
393 || EVP_DigestSignInit_with_libctx(mac_ctx, NULL, EVP_MD_name(m),
394 s->ctx->libctx, s->ctx->propq,
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)
467 memset(&crypto_info, 0, sizeof(crypto_info));
468 switch (s->s3.tmp.new_cipher->algorithm_enc) {
471 crypto_info.cipher_algorithm = CRYPTO_AES_NIST_GCM_16;
472 crypto_info.iv_len = EVP_GCM_TLS_FIXED_IV_LEN;
478 switch (s->s3.tmp.new_cipher->algorithm_mac) {
480 crypto_info.auth_algorithm = CRYPTO_SHA1_HMAC;
483 crypto_info.auth_algorithm = CRYPTO_SHA2_256_HMAC;
486 crypto_info.auth_algorithm = CRYPTO_SHA2_384_HMAC;
491 crypto_info.cipher_algorithm = CRYPTO_AES_CBC;
492 crypto_info.iv_len = EVP_CIPHER_iv_length(c);
493 crypto_info.auth_key = ms;
494 crypto_info.auth_key_len = *mac_secret_size;
499 crypto_info.cipher_key = key;
500 crypto_info.cipher_key_len = EVP_CIPHER_key_length(c);
502 crypto_info.tls_vmajor = (s->version >> 8) & 0x000000ff;
503 crypto_info.tls_vminor = (s->version & 0x000000ff);
504 # else /* !defined(__FreeBSD__) */
505 /* check that cipher is supported */
506 if (!ktls_check_supported_cipher(c, dd))
510 if (s->version != TLS1_2_VERSION)
514 if (which & SSL3_CC_WRITE)
519 if (!ossl_assert(bio != NULL)) {
520 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
521 ERR_R_INTERNAL_ERROR);
525 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
526 if (which & SSL3_CC_WRITE) {
527 if (BIO_flush(bio) <= 0)
531 /* ktls doesn't support renegotiation */
532 if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
533 (BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
534 SSLfatal(s, SSL_AD_NO_RENEGOTIATION, SSL_F_TLS1_CHANGE_CIPHER_STATE,
535 ERR_R_INTERNAL_ERROR);
540 if (which & SSL3_CC_WRITE)
541 rl_sequence = RECORD_LAYER_get_write_sequence(&s->rlayer);
543 rl_sequence = RECORD_LAYER_get_read_sequence(&s->rlayer);
545 if (!ktls_configure_crypto(c, s->version, dd, rl_sequence, &crypto_info,
549 if (which & SSL3_CC_READ) {
550 # ifndef OPENSSL_NO_KTLS_RX
551 count_unprocessed = count_unprocessed_records(s);
552 if (count_unprocessed < 0)
555 /* increment the crypto_info record sequence */
556 while (count_unprocessed) {
557 for (bit = 7; bit >= 0; bit--) { /* increment */
559 if (rec_seq[bit] != 0)
568 # endif /* !__FreeBSD__ */
570 /* ktls works with user provided buffers directly */
571 if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
572 if (which & SSL3_CC_WRITE)
573 ssl3_release_write_buffer(s);
574 SSL_set_options(s, SSL_OP_NO_RENEGOTIATION);
578 #endif /* OPENSSL_NO_KTLS */
579 s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
581 OSSL_TRACE_BEGIN(TLS) {
582 BIO_printf(trc_out, "which = %04X, key:\n", which);
583 BIO_dump_indent(trc_out, key, EVP_CIPHER_key_length(c), 4);
584 BIO_printf(trc_out, "iv:\n");
585 BIO_dump_indent(trc_out, iv, k, 4);
586 } OSSL_TRACE_END(TLS);
593 int tls1_setup_key_block(SSL *s)
599 int mac_type = NID_undef;
600 size_t num, mac_secret_size = 0;
603 if (s->s3.tmp.key_block_length != 0)
606 if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, &mac_type,
607 &mac_secret_size, &comp, s->ext.use_etm)) {
608 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
609 SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
613 ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
614 s->s3.tmp.new_sym_enc = c;
615 ssl_evp_md_free(s->s3.tmp.new_hash);
616 s->s3.tmp.new_hash = hash;
617 s->s3.tmp.new_mac_pkey_type = mac_type;
618 s->s3.tmp.new_mac_secret_size = mac_secret_size;
619 num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
622 ssl3_cleanup_key_block(s);
624 if ((p = OPENSSL_malloc(num)) == NULL) {
625 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
626 ERR_R_MALLOC_FAILURE);
630 s->s3.tmp.key_block_length = num;
631 s->s3.tmp.key_block = p;
633 OSSL_TRACE_BEGIN(TLS) {
634 BIO_printf(trc_out, "client random\n");
635 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
636 BIO_printf(trc_out, "server random\n");
637 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
638 BIO_printf(trc_out, "master key\n");
639 BIO_dump_indent(trc_out,
640 s->session->master_key,
641 s->session->master_key_length, 4);
642 } OSSL_TRACE_END(TLS);
644 if (!tls1_generate_key_block(s, p, num)) {
645 /* SSLfatal() already called */
649 OSSL_TRACE_BEGIN(TLS) {
650 BIO_printf(trc_out, "key block\n");
651 BIO_dump_indent(trc_out, p, num, 4);
652 } OSSL_TRACE_END(TLS);
654 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
655 && s->method->version <= TLS1_VERSION) {
657 * enable vulnerability countermeasure for CBC ciphers with known-IV
658 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
660 s->s3.need_empty_fragments = 1;
662 if (s->session->cipher != NULL) {
663 if (s->session->cipher->algorithm_enc == SSL_eNULL)
664 s->s3.need_empty_fragments = 0;
666 #ifndef OPENSSL_NO_RC4
667 if (s->session->cipher->algorithm_enc == SSL_RC4)
668 s->s3.need_empty_fragments = 0;
678 size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
682 unsigned char hash[EVP_MAX_MD_SIZE];
683 size_t finished_size = TLS1_FINISH_MAC_LENGTH;
685 if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kGOST18)
688 if (!ssl3_digest_cached_records(s, 0)) {
689 /* SSLfatal() already called */
693 if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
694 /* SSLfatal() already called */
698 if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
699 s->session->master_key, s->session->master_key_length,
700 out, finished_size, 1)) {
701 /* SSLfatal() already called */
704 OPENSSL_cleanse(hash, hashlen);
705 return finished_size;
708 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
709 size_t len, size_t *secret_size)
711 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
712 unsigned char hash[EVP_MAX_MD_SIZE * 2];
715 * Digest cached records keeping record buffer (if present): this won't
716 * affect client auth because we're freezing the buffer at the same
717 * point (after client key exchange and before certificate verify)
719 if (!ssl3_digest_cached_records(s, 1)
720 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
721 /* SSLfatal() already called */
724 OSSL_TRACE_BEGIN(TLS) {
725 BIO_printf(trc_out, "Handshake hashes:\n");
726 BIO_dump(trc_out, (char *)hash, hashlen);
727 } OSSL_TRACE_END(TLS);
729 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
730 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
734 NULL, 0, p, len, out,
735 SSL3_MASTER_SECRET_SIZE, 1)) {
736 /* SSLfatal() already called */
739 OPENSSL_cleanse(hash, hashlen);
742 TLS_MD_MASTER_SECRET_CONST,
743 TLS_MD_MASTER_SECRET_CONST_SIZE,
744 s->s3.client_random, SSL3_RANDOM_SIZE,
746 s->s3.server_random, SSL3_RANDOM_SIZE,
747 NULL, 0, p, len, out,
748 SSL3_MASTER_SECRET_SIZE, 1)) {
749 /* SSLfatal() already called */
754 OSSL_TRACE_BEGIN(TLS) {
755 BIO_printf(trc_out, "Premaster Secret:\n");
756 BIO_dump_indent(trc_out, p, len, 4);
757 BIO_printf(trc_out, "Client Random:\n");
758 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
759 BIO_printf(trc_out, "Server Random:\n");
760 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
761 BIO_printf(trc_out, "Master Secret:\n");
762 BIO_dump_indent(trc_out,
763 s->session->master_key,
764 SSL3_MASTER_SECRET_SIZE, 4);
765 } OSSL_TRACE_END(TLS);
767 *secret_size = SSL3_MASTER_SECRET_SIZE;
771 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
772 const char *label, size_t llen,
773 const unsigned char *context,
774 size_t contextlen, int use_context)
776 unsigned char *val = NULL;
777 size_t vallen = 0, currentvalpos;
781 * construct PRF arguments we construct the PRF argument ourself rather
782 * than passing separate values into the TLS PRF to ensure that the
783 * concatenation of values does not create a prohibited label.
785 vallen = llen + SSL3_RANDOM_SIZE * 2;
787 vallen += 2 + contextlen;
790 val = OPENSSL_malloc(vallen);
794 memcpy(val + currentvalpos, (unsigned char *)label, llen);
795 currentvalpos += llen;
796 memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
797 currentvalpos += SSL3_RANDOM_SIZE;
798 memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
799 currentvalpos += SSL3_RANDOM_SIZE;
802 val[currentvalpos] = (contextlen >> 8) & 0xff;
804 val[currentvalpos] = contextlen & 0xff;
806 if ((contextlen > 0) || (context != NULL)) {
807 memcpy(val + currentvalpos, context, contextlen);
812 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
813 * label len) = 15, so size of val > max(prohibited label len) = 15 and
814 * the comparisons won't have buffer overflow
816 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
817 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
819 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
820 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
822 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
823 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
825 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
826 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
828 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
829 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
838 s->session->master_key, s->session->master_key_length,
843 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
847 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
850 OPENSSL_clear_free(val, vallen);
854 int tls1_alert_code(int code)
857 case SSL_AD_CLOSE_NOTIFY:
858 return SSL3_AD_CLOSE_NOTIFY;
859 case SSL_AD_UNEXPECTED_MESSAGE:
860 return SSL3_AD_UNEXPECTED_MESSAGE;
861 case SSL_AD_BAD_RECORD_MAC:
862 return SSL3_AD_BAD_RECORD_MAC;
863 case SSL_AD_DECRYPTION_FAILED:
864 return TLS1_AD_DECRYPTION_FAILED;
865 case SSL_AD_RECORD_OVERFLOW:
866 return TLS1_AD_RECORD_OVERFLOW;
867 case SSL_AD_DECOMPRESSION_FAILURE:
868 return SSL3_AD_DECOMPRESSION_FAILURE;
869 case SSL_AD_HANDSHAKE_FAILURE:
870 return SSL3_AD_HANDSHAKE_FAILURE;
871 case SSL_AD_NO_CERTIFICATE:
873 case SSL_AD_BAD_CERTIFICATE:
874 return SSL3_AD_BAD_CERTIFICATE;
875 case SSL_AD_UNSUPPORTED_CERTIFICATE:
876 return SSL3_AD_UNSUPPORTED_CERTIFICATE;
877 case SSL_AD_CERTIFICATE_REVOKED:
878 return SSL3_AD_CERTIFICATE_REVOKED;
879 case SSL_AD_CERTIFICATE_EXPIRED:
880 return SSL3_AD_CERTIFICATE_EXPIRED;
881 case SSL_AD_CERTIFICATE_UNKNOWN:
882 return SSL3_AD_CERTIFICATE_UNKNOWN;
883 case SSL_AD_ILLEGAL_PARAMETER:
884 return SSL3_AD_ILLEGAL_PARAMETER;
885 case SSL_AD_UNKNOWN_CA:
886 return TLS1_AD_UNKNOWN_CA;
887 case SSL_AD_ACCESS_DENIED:
888 return TLS1_AD_ACCESS_DENIED;
889 case SSL_AD_DECODE_ERROR:
890 return TLS1_AD_DECODE_ERROR;
891 case SSL_AD_DECRYPT_ERROR:
892 return TLS1_AD_DECRYPT_ERROR;
893 case SSL_AD_EXPORT_RESTRICTION:
894 return TLS1_AD_EXPORT_RESTRICTION;
895 case SSL_AD_PROTOCOL_VERSION:
896 return TLS1_AD_PROTOCOL_VERSION;
897 case SSL_AD_INSUFFICIENT_SECURITY:
898 return TLS1_AD_INSUFFICIENT_SECURITY;
899 case SSL_AD_INTERNAL_ERROR:
900 return TLS1_AD_INTERNAL_ERROR;
901 case SSL_AD_USER_CANCELLED:
902 return TLS1_AD_USER_CANCELLED;
903 case SSL_AD_NO_RENEGOTIATION:
904 return TLS1_AD_NO_RENEGOTIATION;
905 case SSL_AD_UNSUPPORTED_EXTENSION:
906 return TLS1_AD_UNSUPPORTED_EXTENSION;
907 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
908 return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
909 case SSL_AD_UNRECOGNIZED_NAME:
910 return TLS1_AD_UNRECOGNIZED_NAME;
911 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
912 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
913 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
914 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
915 case SSL_AD_UNKNOWN_PSK_IDENTITY:
916 return TLS1_AD_UNKNOWN_PSK_IDENTITY;
917 case SSL_AD_INAPPROPRIATE_FALLBACK:
918 return TLS1_AD_INAPPROPRIATE_FALLBACK;
919 case SSL_AD_NO_APPLICATION_PROTOCOL:
920 return TLS1_AD_NO_APPLICATION_PROTOCOL;
921 case SSL_AD_CERTIFICATE_REQUIRED:
922 return SSL_AD_HANDSHAKE_FAILURE;