2 * Copyright 1995-2022 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_get0_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_derive(kctx, out, olen, params)) {
73 EVP_KDF_CTX_free(kctx);
79 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
81 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
82 EVP_KDF_CTX_free(kctx);
86 static int tls1_generate_key_block(SSL *s, unsigned char *km, size_t num)
90 /* Calls SSLfatal() as required */
92 TLS_MD_KEY_EXPANSION_CONST,
93 TLS_MD_KEY_EXPANSION_CONST_SIZE, s->s3.server_random,
94 SSL3_RANDOM_SIZE, s->s3.client_random, SSL3_RANDOM_SIZE,
95 NULL, 0, NULL, 0, s->session->master_key,
96 s->session->master_key_length, km, num, 1);
101 #ifndef OPENSSL_NO_KTLS
103 * Count the number of records that were not processed yet from record boundary.
105 * This function assumes that there are only fully formed records read in the
106 * record layer. If read_ahead is enabled, then this might be false and this
107 * function will fail.
109 # ifndef OPENSSL_NO_KTLS_RX
110 static int count_unprocessed_records(SSL *s)
112 SSL3_BUFFER *rbuf = RECORD_LAYER_get_rbuf(&s->rlayer);
116 if (!PACKET_buf_init(&pkt, rbuf->buf + rbuf->offset, rbuf->left))
119 while (PACKET_remaining(&pkt) > 0) {
120 /* Skip record type and version */
121 if (!PACKET_forward(&pkt, 3))
124 /* Read until next record */
125 if (!PACKET_get_length_prefixed_2(&pkt, &subpkt))
137 int tls_provider_set_tls_params(SSL *s, EVP_CIPHER_CTX *ctx,
138 const EVP_CIPHER *ciph,
142 * Provided cipher, the TLS padding/MAC removal is performed provider
143 * side so we need to tell the ctx about our TLS version and mac size
145 OSSL_PARAM params[3], *pprm = params;
149 if ((EVP_CIPHER_get_flags(ciph) & EVP_CIPH_FLAG_AEAD_CIPHER) == 0
151 * We look at s->ext.use_etm instead of SSL_READ_ETM() or
152 * SSL_WRITE_ETM() because this test applies to both reading
156 imacsize = EVP_MD_get_size(md);
158 macsize = (size_t)imacsize;
160 *pprm++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION,
162 *pprm++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE,
164 *pprm = OSSL_PARAM_construct_end();
166 if (!EVP_CIPHER_CTX_set_params(ctx, params)) {
167 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
175 static int tls_iv_length_within_key_block(const EVP_CIPHER *c)
177 /* If GCM/CCM mode only part of IV comes from PRF */
178 if (EVP_CIPHER_get_mode(c) == EVP_CIPH_GCM_MODE)
179 return EVP_GCM_TLS_FIXED_IV_LEN;
180 else if (EVP_CIPHER_get_mode(c) == EVP_CIPH_CCM_MODE)
181 return EVP_CCM_TLS_FIXED_IV_LEN;
183 return EVP_CIPHER_get_iv_length(c);
186 int tls1_change_cipher_state(SSL *s, int which)
188 unsigned char *p, *mac_secret;
189 unsigned char *ms, *key, *iv;
192 #ifndef OPENSSL_NO_COMP
193 const SSL_COMP *comp;
197 size_t *mac_secret_size;
200 size_t n, i, j, k, cl;
202 #ifndef OPENSSL_NO_KTLS
203 ktls_crypto_info_t crypto_info;
204 unsigned char *rec_seq;
206 # ifndef OPENSSL_NO_KTLS_RX
207 int count_unprocessed;
213 c = s->s3.tmp.new_sym_enc;
214 m = s->s3.tmp.new_hash;
215 mac_type = s->s3.tmp.new_mac_pkey_type;
216 #ifndef OPENSSL_NO_COMP
217 comp = s->s3.tmp.new_compression;
220 if (which & SSL3_CC_READ) {
222 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
224 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ;
226 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
227 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
229 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
231 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
232 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_TLSTREE;
234 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_TLSTREE;
236 if (s->enc_read_ctx != NULL) {
238 } else if ((s->enc_read_ctx = EVP_CIPHER_CTX_new()) == NULL) {
239 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
243 * make sure it's initialised in case we exit later with an error
245 EVP_CIPHER_CTX_reset(s->enc_read_ctx);
247 dd = s->enc_read_ctx;
248 mac_ctx = ssl_replace_hash(&s->read_hash, NULL);
249 if (mac_ctx == NULL) {
250 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
253 #ifndef OPENSSL_NO_COMP
254 COMP_CTX_free(s->expand);
257 s->expand = COMP_CTX_new(comp->method);
258 if (s->expand == NULL) {
259 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
260 SSL_R_COMPRESSION_LIBRARY_ERROR);
266 * this is done by dtls1_reset_seq_numbers for DTLS
269 RECORD_LAYER_reset_read_sequence(&s->rlayer);
270 mac_secret = &(s->s3.read_mac_secret[0]);
271 mac_secret_size = &(s->s3.read_mac_secret_size);
273 s->statem.enc_write_state = ENC_WRITE_STATE_INVALID;
275 s->s3.flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
277 s->s3.flags &= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE;
279 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
280 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
282 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
284 if (s->s3.tmp.new_cipher->algorithm2 & TLS1_TLSTREE)
285 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
287 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE;
288 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s)) {
290 } else if ((s->enc_write_ctx = EVP_CIPHER_CTX_new()) == NULL) {
291 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
294 dd = s->enc_write_ctx;
295 if (SSL_IS_DTLS(s)) {
296 mac_ctx = EVP_MD_CTX_new();
297 if (mac_ctx == NULL) {
298 SSLfatal(s, SSL_AD_INTERNAL_ERROR, 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, 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_R_COMPRESSION_LIBRARY_ERROR);
322 * this is done by dtls1_reset_seq_numbers for DTLS
325 RECORD_LAYER_reset_write_sequence(&s->rlayer);
326 mac_secret = &(s->s3.write_mac_secret[0]);
327 mac_secret_size = &(s->s3.write_mac_secret_size);
331 EVP_CIPHER_CTX_reset(dd);
333 p = s->s3.tmp.key_block;
334 i = *mac_secret_size = s->s3.tmp.new_mac_secret_size;
336 cl = EVP_CIPHER_get_key_length(c);
338 k = tls_iv_length_within_key_block(c);
339 if ((which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
340 (which == SSL3_CHANGE_CIPHER_SERVER_READ)) {
357 if (n > s->s3.tmp.key_block_length) {
358 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
362 memcpy(mac_secret, ms, i);
364 if (!(EVP_CIPHER_get_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)) {
365 if (mac_type == EVP_PKEY_HMAC) {
366 mac_key = EVP_PKEY_new_raw_private_key_ex(s->ctx->libctx, "HMAC",
367 s->ctx->propq, mac_secret,
371 * If its not HMAC then the only other types of MAC we support are
372 * the GOST MACs, so we need to use the old style way of creating
375 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL, mac_secret,
376 (int)*mac_secret_size);
379 || EVP_DigestSignInit_ex(mac_ctx, NULL, EVP_MD_get0_name(m),
380 s->ctx->libctx, s->ctx->propq, mac_key,
382 EVP_PKEY_free(mac_key);
383 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
386 EVP_PKEY_free(mac_key);
389 OSSL_TRACE_BEGIN(TLS) {
390 BIO_printf(trc_out, "which = %04X, mac key:\n", which);
391 BIO_dump_indent(trc_out, ms, i, 4);
392 } OSSL_TRACE_END(TLS);
394 if (EVP_CIPHER_get_mode(c) == EVP_CIPH_GCM_MODE) {
395 if (!EVP_CipherInit_ex(dd, c, NULL, key, NULL, (which & SSL3_CC_WRITE))
396 || EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, (int)k,
398 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
401 } else if (EVP_CIPHER_get_mode(c) == EVP_CIPH_CCM_MODE) {
404 new_cipher->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8))
405 taglen = EVP_CCM8_TLS_TAG_LEN;
407 taglen = EVP_CCM_TLS_TAG_LEN;
408 if (!EVP_CipherInit_ex(dd, c, NULL, NULL, NULL, (which & SSL3_CC_WRITE))
409 || (EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_IVLEN, 12, NULL) <= 0)
410 || (EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_TAG, taglen, NULL) <= 0)
411 || (EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_CCM_SET_IV_FIXED, (int)k, iv) <= 0)
412 || !EVP_CipherInit_ex(dd, NULL, NULL, key, NULL, -1)) {
413 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
417 if (!EVP_CipherInit_ex(dd, c, NULL, key, iv, (which & SSL3_CC_WRITE))) {
418 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
422 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
423 if ((EVP_CIPHER_get_flags(c) & EVP_CIPH_FLAG_AEAD_CIPHER)
425 && EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_AEAD_SET_MAC_KEY,
426 (int)*mac_secret_size, mac_secret) <= 0) {
427 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
432 * The cipher we actually ended up using in the EVP_CIPHER_CTX may be
433 * different to that in c if we have an ENGINE in use
435 if (EVP_CIPHER_get0_provider(EVP_CIPHER_CTX_get0_cipher(dd)) != NULL
436 && !tls_provider_set_tls_params(s, dd, c, m)) {
437 /* SSLfatal already called */
441 #ifndef OPENSSL_NO_KTLS
442 if (s->compress || (s->options & SSL_OP_ENABLE_KTLS) == 0)
445 /* ktls supports only the maximum fragment size */
446 if (ssl_get_max_send_fragment(s) != SSL3_RT_MAX_PLAIN_LENGTH)
449 /* check that cipher is supported */
450 if (!ktls_check_supported_cipher(s, c, dd))
453 if (which & SSL3_CC_WRITE)
458 if (!ossl_assert(bio != NULL)) {
459 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
463 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
464 if (which & SSL3_CC_WRITE) {
465 if (BIO_flush(bio) <= 0)
469 /* ktls doesn't support renegotiation */
470 if ((BIO_get_ktls_send(s->wbio) && (which & SSL3_CC_WRITE)) ||
471 (BIO_get_ktls_recv(s->rbio) && (which & SSL3_CC_READ))) {
472 SSLfatal(s, SSL_AD_NO_RENEGOTIATION, ERR_R_INTERNAL_ERROR);
476 if (which & SSL3_CC_WRITE)
477 rl_sequence = RECORD_LAYER_get_write_sequence(&s->rlayer);
479 rl_sequence = RECORD_LAYER_get_read_sequence(&s->rlayer);
481 if (!ktls_configure_crypto(s, c, dd, rl_sequence, &crypto_info, &rec_seq,
482 iv, key, ms, *mac_secret_size))
485 if (which & SSL3_CC_READ) {
486 # ifndef OPENSSL_NO_KTLS_RX
487 count_unprocessed = count_unprocessed_records(s);
488 if (count_unprocessed < 0)
491 /* increment the crypto_info record sequence */
492 while (count_unprocessed) {
493 for (bit = 7; bit >= 0; bit--) { /* increment */
495 if (rec_seq[bit] != 0)
505 /* ktls works with user provided buffers directly */
506 if (BIO_set_ktls(bio, &crypto_info, which & SSL3_CC_WRITE)) {
507 if (which & SSL3_CC_WRITE)
508 ssl3_release_write_buffer(s);
509 SSL_set_options(s, SSL_OP_NO_RENEGOTIATION);
513 #endif /* OPENSSL_NO_KTLS */
514 s->statem.enc_write_state = ENC_WRITE_STATE_VALID;
516 OSSL_TRACE_BEGIN(TLS) {
517 BIO_printf(trc_out, "which = %04X, key:\n", which);
518 BIO_dump_indent(trc_out, key, EVP_CIPHER_get_key_length(c), 4);
519 BIO_printf(trc_out, "iv:\n");
520 BIO_dump_indent(trc_out, iv, k, 4);
521 } OSSL_TRACE_END(TLS);
528 int tls1_setup_key_block(SSL *s)
534 int mac_type = NID_undef;
535 size_t num, mac_secret_size = 0;
538 if (s->s3.tmp.key_block_length != 0)
541 if (!ssl_cipher_get_evp(s->ctx, s->session, &c, &hash, &mac_type,
542 &mac_secret_size, &comp, s->ext.use_etm)) {
543 /* Error is already recorded */
544 SSLfatal_alert(s, SSL_AD_INTERNAL_ERROR);
548 ssl_evp_cipher_free(s->s3.tmp.new_sym_enc);
549 s->s3.tmp.new_sym_enc = c;
550 ssl_evp_md_free(s->s3.tmp.new_hash);
551 s->s3.tmp.new_hash = hash;
552 s->s3.tmp.new_mac_pkey_type = mac_type;
553 s->s3.tmp.new_mac_secret_size = mac_secret_size;
554 num = mac_secret_size + EVP_CIPHER_get_key_length(c)
555 + tls_iv_length_within_key_block(c);
558 ssl3_cleanup_key_block(s);
560 if ((p = OPENSSL_malloc(num)) == NULL) {
561 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
565 s->s3.tmp.key_block_length = num;
566 s->s3.tmp.key_block = p;
568 OSSL_TRACE_BEGIN(TLS) {
569 BIO_printf(trc_out, "key block length: %zu\n", num);
570 BIO_printf(trc_out, "client random\n");
571 BIO_dump_indent(trc_out, s->s3.client_random, SSL3_RANDOM_SIZE, 4);
572 BIO_printf(trc_out, "server random\n");
573 BIO_dump_indent(trc_out, s->s3.server_random, SSL3_RANDOM_SIZE, 4);
574 BIO_printf(trc_out, "master key\n");
575 BIO_dump_indent(trc_out,
576 s->session->master_key,
577 s->session->master_key_length, 4);
578 } OSSL_TRACE_END(TLS);
580 if (!tls1_generate_key_block(s, p, num)) {
581 /* SSLfatal() already called */
585 OSSL_TRACE_BEGIN(TLS) {
586 BIO_printf(trc_out, "key block\n");
587 BIO_dump_indent(trc_out, p, num, 4);
588 } OSSL_TRACE_END(TLS);
590 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
591 && s->method->version <= TLS1_VERSION) {
593 * enable vulnerability countermeasure for CBC ciphers with known-IV
594 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
596 s->s3.need_empty_fragments = 1;
598 if (s->session->cipher != NULL) {
599 if (s->session->cipher->algorithm_enc == SSL_eNULL)
600 s->s3.need_empty_fragments = 0;
602 if (s->session->cipher->algorithm_enc == SSL_RC4)
603 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;
857 case TLS13_AD_MISSING_EXTENSION:
858 return SSL_AD_HANDSHAKE_FAILURE;