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_CONNECTION
*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(SSL_CONNECTION_GET_CTX(s
)->libctx
,
49 OSSL_KDF_NAME_TLS1_PRF
,
50 SSL_CONNECTION_GET_CTX(s
)->propq
);
53 kctx
= EVP_KDF_CTX_new(kdf
);
57 mdname
= EVP_MD_get0_name(md
);
58 *p
++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST
,
60 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET
,
63 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED
,
64 (void *)seed1
, (size_t)seed1_len
);
65 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED
,
66 (void *)seed2
, (size_t)seed2_len
);
67 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED
,
68 (void *)seed3
, (size_t)seed3_len
);
69 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED
,
70 (void *)seed4
, (size_t)seed4_len
);
71 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SEED
,
72 (void *)seed5
, (size_t)seed5_len
);
73 *p
= OSSL_PARAM_construct_end();
74 if (EVP_KDF_derive(kctx
, out
, olen
, params
)) {
75 EVP_KDF_CTX_free(kctx
);
81 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
83 ERR_raise(ERR_LIB_SSL
, ERR_R_INTERNAL_ERROR
);
84 EVP_KDF_CTX_free(kctx
);
88 static int tls1_generate_key_block(SSL_CONNECTION
*s
, unsigned char *km
,
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 int tls_provider_set_tls_params(SSL_CONNECTION
*s
, EVP_CIPHER_CTX
*ctx
,
105 const EVP_CIPHER
*ciph
,
109 * Provided cipher, the TLS padding/MAC removal is performed provider
110 * side so we need to tell the ctx about our TLS version and mac size
112 OSSL_PARAM params
[3], *pprm
= params
;
116 if ((EVP_CIPHER_get_flags(ciph
) & EVP_CIPH_FLAG_AEAD_CIPHER
) == 0
118 * We look at s->ext.use_etm instead of SSL_READ_ETM() or
119 * SSL_WRITE_ETM() because this test applies to both reading
123 imacsize
= EVP_MD_get_size(md
);
125 macsize
= (size_t)imacsize
;
127 *pprm
++ = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS_VERSION
,
129 *pprm
++ = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE
,
131 *pprm
= OSSL_PARAM_construct_end();
133 if (!EVP_CIPHER_CTX_set_params(ctx
, params
)) {
134 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
142 static int tls_iv_length_within_key_block(const EVP_CIPHER
*c
)
144 /* If GCM/CCM mode only part of IV comes from PRF */
145 if (EVP_CIPHER_get_mode(c
) == EVP_CIPH_GCM_MODE
)
146 return EVP_GCM_TLS_FIXED_IV_LEN
;
147 else if (EVP_CIPHER_get_mode(c
) == EVP_CIPH_CCM_MODE
)
148 return EVP_CCM_TLS_FIXED_IV_LEN
;
150 return EVP_CIPHER_get_iv_length(c
);
153 int tls1_change_cipher_state(SSL_CONNECTION
*s
, int which
)
155 unsigned char *p
, *mac_secret
;
156 unsigned char *key
, *iv
;
159 const SSL_COMP
*comp
= NULL
;
162 size_t mac_secret_size
;
165 size_t n
, i
, j
, k
, cl
;
168 #ifndef OPENSSL_NO_KTLS
169 ktls_crypto_info_t crypto_info
;
173 SSL_CTX
*sctx
= SSL_CONNECTION_GET_CTX(s
);
175 * Taglen is only relevant for CCM ciphersuites. Other ciphersuites
176 * ignore this value so we can default it to 0.
180 c
= s
->s3
.tmp
.new_sym_enc
;
181 m
= s
->s3
.tmp
.new_hash
;
182 mac_type
= s
->s3
.tmp
.new_mac_pkey_type
;
183 #ifndef OPENSSL_NO_COMP
184 comp
= s
->s3
.tmp
.new_compression
;
187 p
= s
->s3
.tmp
.key_block
;
188 i
= mac_secret_size
= s
->s3
.tmp
.new_mac_secret_size
;
190 cl
= EVP_CIPHER_get_key_length(c
);
192 iivlen
= tls_iv_length_within_key_block(c
);
194 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
198 if ((which
== SSL3_CHANGE_CIPHER_CLIENT_WRITE
) ||
199 (which
== SSL3_CHANGE_CIPHER_SERVER_READ
)) {
200 mac_secret
= &(p
[0]);
208 mac_secret
= &(p
[n
]);
216 if (n
> s
->s3
.tmp
.key_block_length
) {
217 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
221 if (EVP_CIPHER_get_mode(c
) == EVP_CIPH_CCM_MODE
) {
222 if ((s
->s3
.tmp
.new_cipher
->algorithm_enc
223 & (SSL_AES128CCM8
| SSL_AES256CCM8
)) != 0)
224 taglen
= EVP_CCM8_TLS_TAG_LEN
;
226 taglen
= EVP_CCM_TLS_TAG_LEN
;
229 if (which
& SSL3_CC_READ
) {
231 s
->s3
.flags
|= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ
;
233 s
->s3
.flags
&= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ
;
235 if (s
->s3
.tmp
.new_cipher
->algorithm2
& TLS1_STREAM_MAC
)
236 s
->mac_flags
|= SSL_MAC_FLAG_READ_MAC_STREAM
;
238 s
->mac_flags
&= ~SSL_MAC_FLAG_READ_MAC_STREAM
;
240 if (s
->s3
.tmp
.new_cipher
->algorithm2
& TLS1_TLSTREE
)
241 s
->mac_flags
|= SSL_MAC_FLAG_READ_MAC_TLSTREE
;
243 s
->mac_flags
&= ~SSL_MAC_FLAG_READ_MAC_TLSTREE
;
245 if (SSL_CONNECTION_IS_DTLS(s
)) {
246 if (s
->enc_read_ctx
!= NULL
) {
248 } else if ((s
->enc_read_ctx
= EVP_CIPHER_CTX_new()) == NULL
) {
249 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_MALLOC_FAILURE
);
253 * make sure it's initialised in case we exit later with an error
255 EVP_CIPHER_CTX_reset(s
->enc_read_ctx
);
257 dd
= s
->enc_read_ctx
;
258 mac_ctx
= ssl_replace_hash(&s
->read_hash
, NULL
);
259 if (mac_ctx
== NULL
) {
260 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
263 #ifndef OPENSSL_NO_COMP
264 COMP_CTX_free(s
->expand
);
267 s
->expand
= COMP_CTX_new(comp
->method
);
268 if (s
->expand
== NULL
) {
269 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
270 SSL_R_COMPRESSION_LIBRARY_ERROR
);
276 * this is done by dtls1_reset_seq_numbers for DTLS
278 if (!SSL_CONNECTION_IS_DTLS(s
))
279 RECORD_LAYER_reset_read_sequence(&s
->rlayer
);
281 if (!ssl_set_new_record_layer(s
, s
->version
,
282 OSSL_RECORD_DIRECTION_READ
,
283 OSSL_RECORD_PROTECTION_LEVEL_APPLICATION
,
284 key
, cl
, iv
, (size_t)k
, mac_secret
,
285 mac_secret_size
, c
, taglen
, mac_type
,
287 /* SSLfatal already called */
291 /* TODO(RECLAYER): Temporary - remove me */
295 s
->statem
.enc_write_state
= ENC_WRITE_STATE_INVALID
;
297 s
->s3
.flags
|= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE
;
299 s
->s3
.flags
&= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE
;
301 if (s
->s3
.tmp
.new_cipher
->algorithm2
& TLS1_STREAM_MAC
)
302 s
->mac_flags
|= SSL_MAC_FLAG_WRITE_MAC_STREAM
;
304 s
->mac_flags
&= ~SSL_MAC_FLAG_WRITE_MAC_STREAM
;
306 if (s
->s3
.tmp
.new_cipher
->algorithm2
& TLS1_TLSTREE
)
307 s
->mac_flags
|= SSL_MAC_FLAG_WRITE_MAC_TLSTREE
;
309 s
->mac_flags
&= ~SSL_MAC_FLAG_WRITE_MAC_TLSTREE
;
310 if (s
->enc_write_ctx
!= NULL
&& !SSL_CONNECTION_IS_DTLS(s
)) {
312 } else if ((s
->enc_write_ctx
= EVP_CIPHER_CTX_new()) == NULL
) {
313 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_MALLOC_FAILURE
);
316 dd
= s
->enc_write_ctx
;
317 if (SSL_CONNECTION_IS_DTLS(s
)) {
318 mac_ctx
= EVP_MD_CTX_new();
319 if (mac_ctx
== NULL
) {
320 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_MALLOC_FAILURE
);
323 s
->write_hash
= mac_ctx
;
325 mac_ctx
= ssl_replace_hash(&s
->write_hash
, NULL
);
326 if (mac_ctx
== NULL
) {
327 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_MALLOC_FAILURE
);
331 #ifndef OPENSSL_NO_COMP
332 COMP_CTX_free(s
->compress
);
335 s
->compress
= COMP_CTX_new(comp
->method
);
336 if (s
->compress
== NULL
) {
337 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
338 SSL_R_COMPRESSION_LIBRARY_ERROR
);
344 * this is done by dtls1_reset_seq_numbers for DTLS
346 if (!SSL_CONNECTION_IS_DTLS(s
))
347 RECORD_LAYER_reset_write_sequence(&s
->rlayer
);
351 EVP_CIPHER_CTX_reset(dd
);
353 if (!(EVP_CIPHER_get_flags(c
) & EVP_CIPH_FLAG_AEAD_CIPHER
)) {
354 if (mac_type
== EVP_PKEY_HMAC
) {
355 mac_key
= EVP_PKEY_new_raw_private_key_ex(sctx
->libctx
, "HMAC",
356 sctx
->propq
, mac_secret
,
360 * If its not HMAC then the only other types of MAC we support are
361 * the GOST MACs, so we need to use the old style way of creating
364 mac_key
= EVP_PKEY_new_mac_key(mac_type
, NULL
, mac_secret
,
365 (int)mac_secret_size
);
368 || EVP_DigestSignInit_ex(mac_ctx
, NULL
, EVP_MD_get0_name(m
),
369 sctx
->libctx
, sctx
->propq
, mac_key
,
371 EVP_PKEY_free(mac_key
);
372 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
375 EVP_PKEY_free(mac_key
);
378 OSSL_TRACE_BEGIN(TLS
) {
379 BIO_printf(trc_out
, "which = %04X, mac key:\n", which
);
380 BIO_dump_indent(trc_out
, mac_secret
, i
, 4);
381 } OSSL_TRACE_END(TLS
);
383 if (EVP_CIPHER_get_mode(c
) == EVP_CIPH_GCM_MODE
) {
384 if (!EVP_CipherInit_ex(dd
, c
, NULL
, key
, NULL
, (which
& SSL3_CC_WRITE
))
385 || EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_GCM_SET_IV_FIXED
, (int)k
,
387 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
390 } else if (EVP_CIPHER_get_mode(c
) == EVP_CIPH_CCM_MODE
) {
391 if (!EVP_CipherInit_ex(dd
, c
, NULL
, NULL
, NULL
, (which
& SSL3_CC_WRITE
))
392 || (EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_IVLEN
, 12, NULL
) <= 0)
393 || (EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_TAG
, taglen
, NULL
) <= 0)
394 || (EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_CCM_SET_IV_FIXED
, (int)k
, iv
) <= 0)
395 || !EVP_CipherInit_ex(dd
, NULL
, NULL
, key
, NULL
, -1)) {
396 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
400 if (!EVP_CipherInit_ex(dd
, c
, NULL
, key
, iv
, (which
& SSL3_CC_WRITE
))) {
401 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
405 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
406 if ((EVP_CIPHER_get_flags(c
) & EVP_CIPH_FLAG_AEAD_CIPHER
)
407 && mac_secret_size
!= 0
408 && EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_MAC_KEY
,
409 (int)mac_secret_size
, mac_secret
) <= 0) {
410 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
413 if (EVP_CIPHER_get0_provider(c
) != NULL
414 && !tls_provider_set_tls_params(s
, dd
, c
, m
)) {
415 /* SSLfatal already called */
419 #ifndef OPENSSL_NO_KTLS
420 if (s
->compress
|| (s
->options
& SSL_OP_ENABLE_KTLS
) == 0)
423 /* ktls supports only the maximum fragment size */
424 if (ssl_get_max_send_fragment(s
) != SSL3_RT_MAX_PLAIN_LENGTH
)
427 /* check that cipher is supported */
428 if (!ktls_check_supported_cipher(s
, c
, m
, taglen
))
431 if (which
& SSL3_CC_WRITE
)
436 if (!ossl_assert(bio
!= NULL
)) {
437 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
441 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
442 if (which
& SSL3_CC_WRITE
) {
443 if (BIO_flush(bio
) <= 0)
447 /* ktls doesn't support renegotiation */
448 if ((BIO_get_ktls_send(s
->wbio
) && (which
& SSL3_CC_WRITE
)) ||
449 (BIO_get_ktls_recv(s
->rbio
) && (which
& SSL3_CC_READ
))) {
450 SSLfatal(s
, SSL_AD_NO_RENEGOTIATION
, ERR_R_INTERNAL_ERROR
);
454 if (which
& SSL3_CC_WRITE
)
455 rl_sequence
= RECORD_LAYER_get_write_sequence(&s
->rlayer
);
457 rl_sequence
= RECORD_LAYER_get_read_sequence(&s
->rlayer
);
459 if (!ktls_configure_crypto(sctx
->libctx
, s
->version
, c
, m
, rl_sequence
,
460 &crypto_info
, which
& SSL3_CC_WRITE
, iv
,
461 (size_t)k
, key
, cl
, mac_secret
, mac_secret_size
))
464 /* ktls works with user provided buffers directly */
465 if (BIO_set_ktls(bio
, &crypto_info
, which
& SSL3_CC_WRITE
)) {
466 if (which
& SSL3_CC_WRITE
)
467 ssl3_release_write_buffer(s
);
468 SSL_set_options(SSL_CONNECTION_GET_SSL(s
), SSL_OP_NO_RENEGOTIATION
);
471 #endif /* OPENSSL_NO_KTLS */
473 s
->statem
.enc_write_state
= ENC_WRITE_STATE_VALID
;
475 OSSL_TRACE_BEGIN(TLS
) {
476 BIO_printf(trc_out
, "which = %04X, key:\n", which
);
477 BIO_dump_indent(trc_out
, key
, EVP_CIPHER_get_key_length(c
), 4);
478 BIO_printf(trc_out
, "iv:\n");
479 BIO_dump_indent(trc_out
, iv
, k
, 4);
480 } OSSL_TRACE_END(TLS
);
487 int tls1_setup_key_block(SSL_CONNECTION
*s
)
493 int mac_type
= NID_undef
;
494 size_t num
, mac_secret_size
= 0;
498 if (s
->s3
.tmp
.key_block_length
!= 0)
501 if (!ssl_cipher_get_evp(SSL_CONNECTION_GET_CTX(s
), s
->session
, &c
, &hash
,
502 &mac_type
, &mac_secret_size
, &comp
,
504 /* Error is already recorded */
505 SSLfatal_alert(s
, SSL_AD_INTERNAL_ERROR
);
509 ssl_evp_cipher_free(s
->s3
.tmp
.new_sym_enc
);
510 s
->s3
.tmp
.new_sym_enc
= c
;
511 ssl_evp_md_free(s
->s3
.tmp
.new_hash
);
512 s
->s3
.tmp
.new_hash
= hash
;
513 s
->s3
.tmp
.new_mac_pkey_type
= mac_type
;
514 s
->s3
.tmp
.new_mac_secret_size
= mac_secret_size
;
515 ivlen
= tls_iv_length_within_key_block(c
);
517 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_INTERNAL_ERROR
);
520 num
= mac_secret_size
+ EVP_CIPHER_get_key_length(c
) + ivlen
;
523 ssl3_cleanup_key_block(s
);
525 if ((p
= OPENSSL_malloc(num
)) == NULL
) {
526 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, ERR_R_MALLOC_FAILURE
);
530 s
->s3
.tmp
.key_block_length
= num
;
531 s
->s3
.tmp
.key_block
= p
;
533 OSSL_TRACE_BEGIN(TLS
) {
534 BIO_printf(trc_out
, "key block length: %zu\n", num
);
535 BIO_printf(trc_out
, "client random\n");
536 BIO_dump_indent(trc_out
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
, 4);
537 BIO_printf(trc_out
, "server random\n");
538 BIO_dump_indent(trc_out
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
, 4);
539 BIO_printf(trc_out
, "master key\n");
540 BIO_dump_indent(trc_out
,
541 s
->session
->master_key
,
542 s
->session
->master_key_length
, 4);
543 } OSSL_TRACE_END(TLS
);
545 if (!tls1_generate_key_block(s
, p
, num
)) {
546 /* SSLfatal() already called */
550 OSSL_TRACE_BEGIN(TLS
) {
551 BIO_printf(trc_out
, "key block\n");
552 BIO_dump_indent(trc_out
, p
, num
, 4);
553 } OSSL_TRACE_END(TLS
);
555 if (!(s
->options
& SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
)
556 && SSL_CONNECTION_GET_SSL(s
)->method
->version
<= TLS1_VERSION
) {
558 * enable vulnerability countermeasure for CBC ciphers with known-IV
559 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
561 s
->s3
.need_empty_fragments
= 1;
563 if (s
->session
->cipher
!= NULL
) {
564 if (s
->session
->cipher
->algorithm_enc
== SSL_eNULL
)
565 s
->s3
.need_empty_fragments
= 0;
567 if (s
->session
->cipher
->algorithm_enc
== SSL_RC4
)
568 s
->s3
.need_empty_fragments
= 0;
577 size_t tls1_final_finish_mac(SSL_CONNECTION
*s
, const char *str
,
578 size_t slen
, unsigned char *out
)
581 unsigned char hash
[EVP_MAX_MD_SIZE
];
582 size_t finished_size
= TLS1_FINISH_MAC_LENGTH
;
584 if (s
->s3
.tmp
.new_cipher
->algorithm_mkey
& SSL_kGOST18
)
587 if (!ssl3_digest_cached_records(s
, 0)) {
588 /* SSLfatal() already called */
592 if (!ssl_handshake_hash(s
, hash
, sizeof(hash
), &hashlen
)) {
593 /* SSLfatal() already called */
597 if (!tls1_PRF(s
, str
, slen
, hash
, hashlen
, NULL
, 0, NULL
, 0, NULL
, 0,
598 s
->session
->master_key
, s
->session
->master_key_length
,
599 out
, finished_size
, 1)) {
600 /* SSLfatal() already called */
603 OPENSSL_cleanse(hash
, hashlen
);
604 return finished_size
;
607 int tls1_generate_master_secret(SSL_CONNECTION
*s
, unsigned char *out
,
608 unsigned char *p
, size_t len
,
611 if (s
->session
->flags
& SSL_SESS_FLAG_EXTMS
) {
612 unsigned char hash
[EVP_MAX_MD_SIZE
* 2];
615 * Digest cached records keeping record buffer (if present): this won't
616 * affect client auth because we're freezing the buffer at the same
617 * point (after client key exchange and before certificate verify)
619 if (!ssl3_digest_cached_records(s
, 1)
620 || !ssl_handshake_hash(s
, hash
, sizeof(hash
), &hashlen
)) {
621 /* SSLfatal() already called */
624 OSSL_TRACE_BEGIN(TLS
) {
625 BIO_printf(trc_out
, "Handshake hashes:\n");
626 BIO_dump(trc_out
, (char *)hash
, hashlen
);
627 } OSSL_TRACE_END(TLS
);
629 TLS_MD_EXTENDED_MASTER_SECRET_CONST
,
630 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE
,
634 NULL
, 0, p
, len
, out
,
635 SSL3_MASTER_SECRET_SIZE
, 1)) {
636 /* SSLfatal() already called */
639 OPENSSL_cleanse(hash
, hashlen
);
642 TLS_MD_MASTER_SECRET_CONST
,
643 TLS_MD_MASTER_SECRET_CONST_SIZE
,
644 s
->s3
.client_random
, SSL3_RANDOM_SIZE
,
646 s
->s3
.server_random
, SSL3_RANDOM_SIZE
,
647 NULL
, 0, p
, len
, out
,
648 SSL3_MASTER_SECRET_SIZE
, 1)) {
649 /* SSLfatal() already called */
654 OSSL_TRACE_BEGIN(TLS
) {
655 BIO_printf(trc_out
, "Premaster Secret:\n");
656 BIO_dump_indent(trc_out
, p
, len
, 4);
657 BIO_printf(trc_out
, "Client Random:\n");
658 BIO_dump_indent(trc_out
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
, 4);
659 BIO_printf(trc_out
, "Server Random:\n");
660 BIO_dump_indent(trc_out
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
, 4);
661 BIO_printf(trc_out
, "Master Secret:\n");
662 BIO_dump_indent(trc_out
,
663 s
->session
->master_key
,
664 SSL3_MASTER_SECRET_SIZE
, 4);
665 } OSSL_TRACE_END(TLS
);
667 *secret_size
= SSL3_MASTER_SECRET_SIZE
;
671 int tls1_export_keying_material(SSL_CONNECTION
*s
, unsigned char *out
,
672 size_t olen
, const char *label
, size_t llen
,
673 const unsigned char *context
,
674 size_t contextlen
, int use_context
)
676 unsigned char *val
= NULL
;
677 size_t vallen
= 0, currentvalpos
;
681 * construct PRF arguments we construct the PRF argument ourself rather
682 * than passing separate values into the TLS PRF to ensure that the
683 * concatenation of values does not create a prohibited label.
685 vallen
= llen
+ SSL3_RANDOM_SIZE
* 2;
687 vallen
+= 2 + contextlen
;
690 val
= OPENSSL_malloc(vallen
);
694 memcpy(val
+ currentvalpos
, (unsigned char *)label
, llen
);
695 currentvalpos
+= llen
;
696 memcpy(val
+ currentvalpos
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
);
697 currentvalpos
+= SSL3_RANDOM_SIZE
;
698 memcpy(val
+ currentvalpos
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
);
699 currentvalpos
+= SSL3_RANDOM_SIZE
;
702 val
[currentvalpos
] = (contextlen
>> 8) & 0xff;
704 val
[currentvalpos
] = contextlen
& 0xff;
706 if ((contextlen
> 0) || (context
!= NULL
)) {
707 memcpy(val
+ currentvalpos
, context
, contextlen
);
712 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
713 * label len) = 15, so size of val > max(prohibited label len) = 15 and
714 * the comparisons won't have buffer overflow
716 if (memcmp(val
, TLS_MD_CLIENT_FINISH_CONST
,
717 TLS_MD_CLIENT_FINISH_CONST_SIZE
) == 0)
719 if (memcmp(val
, TLS_MD_SERVER_FINISH_CONST
,
720 TLS_MD_SERVER_FINISH_CONST_SIZE
) == 0)
722 if (memcmp(val
, TLS_MD_MASTER_SECRET_CONST
,
723 TLS_MD_MASTER_SECRET_CONST_SIZE
) == 0)
725 if (memcmp(val
, TLS_MD_EXTENDED_MASTER_SECRET_CONST
,
726 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE
) == 0)
728 if (memcmp(val
, TLS_MD_KEY_EXPANSION_CONST
,
729 TLS_MD_KEY_EXPANSION_CONST_SIZE
) == 0)
738 s
->session
->master_key
, s
->session
->master_key_length
,
743 ERR_raise(ERR_LIB_SSL
, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL
);
747 ERR_raise(ERR_LIB_SSL
, ERR_R_MALLOC_FAILURE
);
750 OPENSSL_clear_free(val
, vallen
);
754 int tls1_alert_code(int code
)
757 case SSL_AD_CLOSE_NOTIFY
:
758 return SSL3_AD_CLOSE_NOTIFY
;
759 case SSL_AD_UNEXPECTED_MESSAGE
:
760 return SSL3_AD_UNEXPECTED_MESSAGE
;
761 case SSL_AD_BAD_RECORD_MAC
:
762 return SSL3_AD_BAD_RECORD_MAC
;
763 case SSL_AD_DECRYPTION_FAILED
:
764 return TLS1_AD_DECRYPTION_FAILED
;
765 case SSL_AD_RECORD_OVERFLOW
:
766 return TLS1_AD_RECORD_OVERFLOW
;
767 case SSL_AD_DECOMPRESSION_FAILURE
:
768 return SSL3_AD_DECOMPRESSION_FAILURE
;
769 case SSL_AD_HANDSHAKE_FAILURE
:
770 return SSL3_AD_HANDSHAKE_FAILURE
;
771 case SSL_AD_NO_CERTIFICATE
:
773 case SSL_AD_BAD_CERTIFICATE
:
774 return SSL3_AD_BAD_CERTIFICATE
;
775 case SSL_AD_UNSUPPORTED_CERTIFICATE
:
776 return SSL3_AD_UNSUPPORTED_CERTIFICATE
;
777 case SSL_AD_CERTIFICATE_REVOKED
:
778 return SSL3_AD_CERTIFICATE_REVOKED
;
779 case SSL_AD_CERTIFICATE_EXPIRED
:
780 return SSL3_AD_CERTIFICATE_EXPIRED
;
781 case SSL_AD_CERTIFICATE_UNKNOWN
:
782 return SSL3_AD_CERTIFICATE_UNKNOWN
;
783 case SSL_AD_ILLEGAL_PARAMETER
:
784 return SSL3_AD_ILLEGAL_PARAMETER
;
785 case SSL_AD_UNKNOWN_CA
:
786 return TLS1_AD_UNKNOWN_CA
;
787 case SSL_AD_ACCESS_DENIED
:
788 return TLS1_AD_ACCESS_DENIED
;
789 case SSL_AD_DECODE_ERROR
:
790 return TLS1_AD_DECODE_ERROR
;
791 case SSL_AD_DECRYPT_ERROR
:
792 return TLS1_AD_DECRYPT_ERROR
;
793 case SSL_AD_EXPORT_RESTRICTION
:
794 return TLS1_AD_EXPORT_RESTRICTION
;
795 case SSL_AD_PROTOCOL_VERSION
:
796 return TLS1_AD_PROTOCOL_VERSION
;
797 case SSL_AD_INSUFFICIENT_SECURITY
:
798 return TLS1_AD_INSUFFICIENT_SECURITY
;
799 case SSL_AD_INTERNAL_ERROR
:
800 return TLS1_AD_INTERNAL_ERROR
;
801 case SSL_AD_USER_CANCELLED
:
802 return TLS1_AD_USER_CANCELLED
;
803 case SSL_AD_NO_RENEGOTIATION
:
804 return TLS1_AD_NO_RENEGOTIATION
;
805 case SSL_AD_UNSUPPORTED_EXTENSION
:
806 return TLS1_AD_UNSUPPORTED_EXTENSION
;
807 case SSL_AD_CERTIFICATE_UNOBTAINABLE
:
808 return TLS1_AD_CERTIFICATE_UNOBTAINABLE
;
809 case SSL_AD_UNRECOGNIZED_NAME
:
810 return TLS1_AD_UNRECOGNIZED_NAME
;
811 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE
:
812 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE
;
813 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE
:
814 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE
;
815 case SSL_AD_UNKNOWN_PSK_IDENTITY
:
816 return TLS1_AD_UNKNOWN_PSK_IDENTITY
;
817 case SSL_AD_INAPPROPRIATE_FALLBACK
:
818 return TLS1_AD_INAPPROPRIATE_FALLBACK
;
819 case SSL_AD_NO_APPLICATION_PROTOCOL
:
820 return TLS1_AD_NO_APPLICATION_PROTOCOL
;
821 case SSL_AD_CERTIFICATE_REQUIRED
:
822 return SSL_AD_HANDSHAKE_FAILURE
;
823 case TLS13_AD_MISSING_EXTENSION
:
824 return SSL_AD_HANDSHAKE_FAILURE
;