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;
196 unsigned char *rec_seq;
198 # ifndef OPENSSL_NO_KTLS_RX
199 int count_unprocessed;
205 c = s->s3.tmp.new_sym_enc;
206 m = s->s3.tmp.new_hash;
207 mac_type = s->s3.tmp.new_mac_pkey_type;
208 #ifndef OPENSSL_NO_COMP
209 comp = s->s3.tmp.new_compression;
212 if (which & SSL3_CC_READ) {
214 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
216 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
218 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
219 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
221 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
223 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
224 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
226 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
228 if (s->enc_read_ctx != NULL) {
230 } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
231 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
232 ERR_R_MALLOC_FAILURE);
236 * make sure it's initialised in case we exit later with an error
238 EVP_CIPHER_CTX_reset(s->enc_read_ctx);
240 dd = s->enc_read_ctx;
241 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
242 if (mac_ctx == NULL) {
243 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
244 ERR_R_INTERNAL_ERROR);
247 #ifndef OPENSSL_NO_COMP
248 COMP_CTX_free(s->expand);
251 s->expand = COMP_CTX_new(comp->method);
252 if (s->expand == NULL) {
253 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
254 SSL_F_TLS1_CHANGE_CIPHER_STATE,
255 SSL_R_COMPRESSION_LIBRARY_ERROR);
261 * this is done by dtls1_reset_seq_numbers for DTLS
264 RECORD_LAYER_reset_read_sequence(&s->rlayer);
265 mac_secret = &(s->s3.read_mac_secret[0]);
266 mac_secret_size = &(s->s3.read_mac_secret_size);
268 s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
270 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
272 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
274 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
275 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
277 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
279 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
280 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
282 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
283 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
285 } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
286 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
287 ERR_R_MALLOC_FAILURE);
290 dd = s->enc_write_ctx;
291 if (SSL_IS_DTLS(s)) {
292 mac_ctx = EVP_MD_CTX_new();
293 if (mac_ctx == NULL) {
294 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
295 SSL_F_TLS1_CHANGE_CIPHER_STATE,
296 ERR_R_MALLOC_FAILURE);
299 s->write_hash = mac_ctx;
301 mac_ctx = ssl_replace_hash(&s->write_hash, NULL);
302 if (mac_ctx == NULL) {
303 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
304 SSL_F_TLS1_CHANGE_CIPHER_STATE,
305 ERR_R_MALLOC_FAILURE);
309 #ifndef OPENSSL_NO_COMP
310 COMP_CTX_free(s->compress);
313 s->compress = COMP_CTX_new(comp->method);
314 if (s->compress == NULL) {
315 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
316 SSL_F_TLS1_CHANGE_CIPHER_STATE,
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 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
341 /* If GCM/CCM mode only part of IV comes from PRF */
342 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
343 k = EVP_GCM_TLS_FIXED_IV_LEN;
344 else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE)
345 k = EVP_CCM_TLS_FIXED_IV_LEN;
347 k = EVP_CIPHER_iv_length(c);
348 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
349 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
366 if (n > s->s3.tmp.key_block_length) {
367 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
368 ERR_R_INTERNAL_ERROR);
372 memcpy(mac_secret, ms, i);
374 if (!(EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
375 if (mac_type == EVP_PKEY_HMAC) {
376 mac_key = EVP_PKEY_new_raw_private_key_with_libctx(s->ctx->libctx,
383 * If its not HMAC then the only other types of MAC we support are
384 * the GOST MACs, so we need to use the old style way of creating
387 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
388 (int)*mac_secret_size);
391 || EVP_DigestSignInit_with_libctx(mac_ctx, NULL, EVP_MD_name(m),
392 s->ctx->libctx, s->ctx->propq,
394 EVP_PKEY_free(mac_key);
395 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
396 ERR_R_INTERNAL_ERROR);
399 EVP_PKEY_free(mac_key);
402 OSSL_TRACE_BEGIN(TLS) {
403 BIO_printf(trc_out, "which = %04X, mac key:\n", which);
404 BIO_dump_indent(trc_out, ms, i, 4);
405 } OSSL_TRACE_END(TLS);
407 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) {
408 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
409 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
411 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
412 ERR_R_INTERNAL_ERROR);
415 } else if (EVP_CIPHER_mode(c) == EVP_CIPH_CCM_MODE) {
418 new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
419 taglen = EVP_CCM8_TLS_TAG_LEN;
421 taglen = EVP_CCM_TLS_TAG_LEN;
422 if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
423 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL)
424 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL)
425 || !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv)
426 || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
427 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
428 ERR_R_INTERNAL_ERROR);
432 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
433 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
434 ERR_R_INTERNAL_ERROR);
438 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
439 if ((EVP_CIPHER_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size
440 && !EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
441 (int)*mac_secret_size, mac_secret)) {
442 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
443 ERR_R_INTERNAL_ERROR);
446 if (EVP_CIPHER_provider(c) != NULL
447 && !tls_provider_set_tls_params(s, dd, c, m)) {
448 /* SSLfatal already called */
452 #ifndef OPENSSL_NO_KTLS
456 if (((which & SSL3_CC_READ) && (s->mode & SSL_MODE_NO_KTLS_RX))
457 || ((which & SSL3_CC_WRITE) && (s->mode & SSL_MODE_NO_KTLS_TX)))
460 /* ktls supports only the maximum fragment size */
461 if (ssl_get_max_send_fragment(s) != SSL3_RT_MAX_PLAIN_LENGTH)
464 /* check that cipher is supported */
465 if (!ktls_check_supported_cipher(s, c, dd))
468 if (which & SSL3_CC_WRITE)
473 if (!ossl_assert(bio != NULL)) {
474 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_CHANGE_CIPHER_STATE,
475 ERR_R_INTERNAL_ERROR);
479 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
480 if (which & SSL3_CC_WRITE) {
481 if (BIO_flush(bio) <= 0)
485 /* ktls doesn't support renegotiation */
486 if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
487 (BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
488 SSLfatal(s, SSL_AD_NO_RENEGOTIATION, SSL_F_TLS1_CHANGE_CIPHER_STATE,
489 ERR_R_INTERNAL_ERROR);
493 if (which & SSL3_CC_WRITE)
494 rl_sequence = RECORD_LAYER_get_write_sequence(&s->rlayer);
496 rl_sequence = RECORD_LAYER_get_read_sequence(&s->rlayer);
498 if (!ktls_configure_crypto(s, c, dd, rl_sequence, &crypto_info, &rec_seq,
499 iv, key, ms, *mac_secret_size))
502 if (which & SSL3_CC_READ) {
503 # ifndef OPENSSL_NO_KTLS_RX
504 count_unprocessed = count_unprocessed_records(s);
505 if (count_unprocessed < 0)
508 /* increment the crypto_info record sequence */
509 while (count_unprocessed) {
510 for (bit = 7; bit >= 0; bit--) { /* increment */
512 if (rec_seq[bit] != 0)
522 /* ktls works with user provided buffers directly */
523 if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
524 if (which & SSL3_CC_WRITE)
525 ssl3_release_write_buffer(s);
526 SSL_set_options(s, SSL_OP_NO_RENEGOTIATION);
530 #endif /* OPENSSL_NO_KTLS */
531 s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
533 OSSL_TRACE_BEGIN(TLS) {
534 BIO_printf(trc_out, "which = %04X, key:\n", which);
535 BIO_dump_indent(trc_out, key, EVP_CIPHER_key_length(c), 4);
536 BIO_printf(trc_out, "iv:\n");
537 BIO_dump_indent(trc_out, iv, k, 4);
538 } OSSL_TRACE_END(TLS);
545 int tls1_setup_key_block(SSL *s)
551 int mac_type = NID_undef;
552 size_t num, mac_secret_size = 0;
555 if (s->s3.tmp.key_block_length != 0)
558 if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, &mac_type,
559 &mac_secret_size, &comp, s->ext.use_etm)) {
560 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
561 SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
565 ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
566 s->s3.tmp.new_sym_enc = c;
567 ssl_evp_md_free(s->s3.tmp.new_hash);
568 s->s3.tmp.new_hash = hash;
569 s->s3.tmp.new_mac_pkey_type = mac_type;
570 s->s3.tmp.new_mac_secret_size = mac_secret_size;
571 num = EVP_CIPHER_key_length(c) + mac_secret_size + EVP_CIPHER_iv_length(c);
574 ssl3_cleanup_key_block(s);
576 if ((p = OPENSSL_malloc(num)) == NULL) {
577 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_SETUP_KEY_BLOCK,
578 ERR_R_MALLOC_FAILURE);
582 s->s3.tmp.key_block_length = num;
583 s->s3.tmp.key_block = p;
585 OSSL_TRACE_BEGIN(TLS) {
586 BIO_printf(trc_out, "client random\n");
587 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
588 BIO_printf(trc_out, "server random\n");
589 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
590 BIO_printf(trc_out, "master key\n");
591 BIO_dump_indent(trc_out,
592 s->session->master_key,
593 s->session->master_key_length, 4);
594 } OSSL_TRACE_END(TLS);
596 if (!tls1_generate_key_block(s, p, num)) {
597 /* SSLfatal() already called */
601 OSSL_TRACE_BEGIN(TLS) {
602 BIO_printf(trc_out, "key block\n");
603 BIO_dump_indent(trc_out, p, num, 4);
604 } OSSL_TRACE_END(TLS);
606 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
607 && s->method->version <= TLS1_VERSION) {
609 * enable vulnerability countermeasure for CBC ciphers with known-IV
610 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
612 s->s3.need_empty_fragments = 1;
614 if (s->session->cipher != NULL) {
615 if (s->session->cipher->algorithm_enc == SSL_eNULL)
616 s->s3.need_empty_fragments = 0;
618 #ifndef OPENSSL_NO_RC4
619 if (s->session->cipher->algorithm_enc == SSL_RC4)
620 s->s3.need_empty_fragments = 0;
630 size_t tls1_final_finish_mac(SSL *s, const char *str, size_t slen,
634 unsigned char hash[EVP_MAX_MD_SIZE];
635 size_t finished_size = TLS1_FINISH_MAC_LENGTH;
637 if (s->s3.tmp.new_cipher->algorithm_mkey & SSL_kGOST18)
640 if (!ssl3_digest_cached_records(s, 0)) {
641 /* SSLfatal() already called */
645 if (!ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
646 /* SSLfatal() already called */
650 if (!tls1_PRF(s, str, slen, hash, hashlen, NULL, 0, NULL, 0, NULL, 0,
651 s->session->master_key, s->session->master_key_length,
652 out, finished_size, 1)) {
653 /* SSLfatal() already called */
656 OPENSSL_cleanse(hash, hashlen);
657 return finished_size;
660 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
661 size_t len, size_t *secret_size)
663 if (s->session->flags & SSL_SESS_FLAG_EXTMS) {
664 unsigned char hash[EVP_MAX_MD_SIZE * 2];
667 * Digest cached records keeping record buffer (if present): this won't
668 * affect client auth because we're freezing the buffer at the same
669 * point (after client key exchange and before certificate verify)
671 if (!ssl3_digest_cached_records(s, 1)
672 || !ssl_handshake_hash(s, hash, sizeof(hash), &hashlen)) {
673 /* SSLfatal() already called */
676 OSSL_TRACE_BEGIN(TLS) {
677 BIO_printf(trc_out, "Handshake hashes:\n");
678 BIO_dump(trc_out, (char *)hash, hashlen);
679 } OSSL_TRACE_END(TLS);
681 TLS_MD_EXTENDED_MASTER_SECRET_CONST,
682 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE,
686 NULL, 0, p, len, out,
687 SSL3_MASTER_SECRET_SIZE, 1)) {
688 /* SSLfatal() already called */
691 OPENSSL_cleanse(hash, hashlen);
694 TLS_MD_MASTER_SECRET_CONST,
695 TLS_MD_MASTER_SECRET_CONST_SIZE,
696 s->s3.client_random, SSL3_RANDOM_SIZE,
698 s->s3.server_random, SSL3_RANDOM_SIZE,
699 NULL, 0, p, len, out,
700 SSL3_MASTER_SECRET_SIZE, 1)) {
701 /* SSLfatal() already called */
706 OSSL_TRACE_BEGIN(TLS) {
707 BIO_printf(trc_out, "Premaster Secret:\n");
708 BIO_dump_indent(trc_out, p, len, 4);
709 BIO_printf(trc_out, "Client Random:\n");
710 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
711 BIO_printf(trc_out, "Server Random:\n");
712 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
713 BIO_printf(trc_out, "Master Secret:\n");
714 BIO_dump_indent(trc_out,
715 s->session->master_key,
716 SSL3_MASTER_SECRET_SIZE, 4);
717 } OSSL_TRACE_END(TLS);
719 *secret_size = SSL3_MASTER_SECRET_SIZE;
723 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
724 const char *label, size_t llen,
725 const unsigned char *context,
726 size_t contextlen, int use_context)
728 unsigned char *val = NULL;
729 size_t vallen = 0, currentvalpos;
733 * construct PRF arguments we construct the PRF argument ourself rather
734 * than passing separate values into the TLS PRF to ensure that the
735 * concatenation of values does not create a prohibited label.
737 vallen = llen + SSL3_RANDOM_SIZE * 2;
739 vallen += 2 + contextlen;
742 val = OPENSSL_malloc(vallen);
746 memcpy(val + currentvalpos, (unsigned char *)label, llen);
747 currentvalpos += llen;
748 memcpy(val + currentvalpos, s->s3.client_random, SSL3_RANDOM_SIZE);
749 currentvalpos += SSL3_RANDOM_SIZE;
750 memcpy(val + currentvalpos, s->s3.server_random, SSL3_RANDOM_SIZE);
751 currentvalpos += SSL3_RANDOM_SIZE;
754 val[currentvalpos] = (contextlen >> 8) & 0xff;
756 val[currentvalpos] = contextlen & 0xff;
758 if ((contextlen > 0) || (context != NULL)) {
759 memcpy(val + currentvalpos, context, contextlen);
764 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
765 * label len) = 15, so size of val > max(prohibited label len) = 15 and
766 * the comparisons won't have buffer overflow
768 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
769 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0)
771 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
772 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0)
774 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
775 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0)
777 if (memcmp(val, TLS_MD_EXTENDED_MASTER_SECRET_CONST,
778 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE) == 0)
780 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
781 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0)
790 s->session->master_key, s->session->master_key_length,
795 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
799 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
802 OPENSSL_clear_free(val, vallen);
806 int tls1_alert_code(int code)
809 case SSL_AD_CLOSE_NOTIFY:
810 return SSL3_AD_CLOSE_NOTIFY;
811 case SSL_AD_UNEXPECTED_MESSAGE:
812 return SSL3_AD_UNEXPECTED_MESSAGE;
813 case SSL_AD_BAD_RECORD_MAC:
814 return SSL3_AD_BAD_RECORD_MAC;
815 case SSL_AD_DECRYPTION_FAILED:
816 return TLS1_AD_DECRYPTION_FAILED;
817 case SSL_AD_RECORD_OVERFLOW:
818 return TLS1_AD_RECORD_OVERFLOW;
819 case SSL_AD_DECOMPRESSION_FAILURE:
820 return SSL3_AD_DECOMPRESSION_FAILURE;
821 case SSL_AD_HANDSHAKE_FAILURE:
822 return SSL3_AD_HANDSHAKE_FAILURE;
823 case SSL_AD_NO_CERTIFICATE:
825 case SSL_AD_BAD_CERTIFICATE:
826 return SSL3_AD_BAD_CERTIFICATE;
827 case SSL_AD_UNSUPPORTED_CERTIFICATE:
828 return SSL3_AD_UNSUPPORTED_CERTIFICATE;
829 case SSL_AD_CERTIFICATE_REVOKED:
830 return SSL3_AD_CERTIFICATE_REVOKED;
831 case SSL_AD_CERTIFICATE_EXPIRED:
832 return SSL3_AD_CERTIFICATE_EXPIRED;
833 case SSL_AD_CERTIFICATE_UNKNOWN:
834 return SSL3_AD_CERTIFICATE_UNKNOWN;
835 case SSL_AD_ILLEGAL_PARAMETER:
836 return SSL3_AD_ILLEGAL_PARAMETER;
837 case SSL_AD_UNKNOWN_CA:
838 return TLS1_AD_UNKNOWN_CA;
839 case SSL_AD_ACCESS_DENIED:
840 return TLS1_AD_ACCESS_DENIED;
841 case SSL_AD_DECODE_ERROR:
842 return TLS1_AD_DECODE_ERROR;
843 case SSL_AD_DECRYPT_ERROR:
844 return TLS1_AD_DECRYPT_ERROR;
845 case SSL_AD_EXPORT_RESTRICTION:
846 return TLS1_AD_EXPORT_RESTRICTION;
847 case SSL_AD_PROTOCOL_VERSION:
848 return TLS1_AD_PROTOCOL_VERSION;
849 case SSL_AD_INSUFFICIENT_SECURITY:
850 return TLS1_AD_INSUFFICIENT_SECURITY;
851 case SSL_AD_INTERNAL_ERROR:
852 return TLS1_AD_INTERNAL_ERROR;
853 case SSL_AD_USER_CANCELLED:
854 return TLS1_AD_USER_CANCELLED;
855 case SSL_AD_NO_RENEGOTIATION:
856 return TLS1_AD_NO_RENEGOTIATION;
857 case SSL_AD_UNSUPPORTED_EXTENSION:
858 return TLS1_AD_UNSUPPORTED_EXTENSION;
859 case SSL_AD_CERTIFICATE_UNOBTAINABLE:
860 return TLS1_AD_CERTIFICATE_UNOBTAINABLE;
861 case SSL_AD_UNRECOGNIZED_NAME:
862 return TLS1_AD_UNRECOGNIZED_NAME;
863 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE:
864 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
865 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE:
866 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE;
867 case SSL_AD_UNKNOWN_PSK_IDENTITY:
868 return TLS1_AD_UNKNOWN_PSK_IDENTITY;
869 case SSL_AD_INAPPROPRIATE_FALLBACK:
870 return TLS1_AD_INAPPROPRIATE_FALLBACK;
871 case SSL_AD_NO_APPLICATION_PROTOCOL:
872 return TLS1_AD_NO_APPLICATION_PROTOCOL;
873 case SSL_AD_CERTIFICATE_REQUIRED:
874 return SSL_AD_HANDSHAKE_FAILURE;