2 * Copyright 1995-2018 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
13 #include "record/record_locl.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(NULL
, OSSL_KDF_NAME_TLS1_PRF
, NULL
);
52 kctx
= EVP_KDF_CTX_new(kdf
);
56 mdname
= EVP_MD_name(md
);
57 *p
++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST
,
58 (char *)mdname
, strlen(mdname
) + 1);
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 static int count_unprocessed_records(SSL
*s
)
114 SSL3_BUFFER
*rbuf
= RECORD_LAYER_get_rbuf(&s
->rlayer
);
118 if (!PACKET_buf_init(&pkt
, rbuf
->buf
+ rbuf
->offset
, rbuf
->left
))
121 while (PACKET_remaining(&pkt
) > 0) {
122 /* Skip record type and version */
123 if (!PACKET_forward(&pkt
, 3))
126 /* Read until next record */
127 if (PACKET_get_length_prefixed_2(&pkt
, &subpkt
))
137 int tls1_change_cipher_state(SSL
*s
, int which
)
139 unsigned char *p
, *mac_secret
;
140 unsigned char *ms
, *key
, *iv
;
143 #ifndef OPENSSL_NO_COMP
144 const SSL_COMP
*comp
;
148 size_t *mac_secret_size
;
151 size_t n
, i
, j
, k
, cl
;
153 #ifndef OPENSSL_NO_KTLS
154 struct tls12_crypto_info_aes_gcm_128 crypto_info
;
156 unsigned char geniv
[12];
157 int count_unprocessed
;
161 c
= s
->s3
.tmp
.new_sym_enc
;
162 m
= s
->s3
.tmp
.new_hash
;
163 mac_type
= s
->s3
.tmp
.new_mac_pkey_type
;
164 #ifndef OPENSSL_NO_COMP
165 comp
= s
->s3
.tmp
.new_compression
;
168 if (which
& SSL3_CC_READ
) {
170 s
->s3
.flags
|= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ
;
172 s
->s3
.flags
&= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ
;
174 if (s
->s3
.tmp
.new_cipher
->algorithm2
& TLS1_STREAM_MAC
)
175 s
->mac_flags
|= SSL_MAC_FLAG_READ_MAC_STREAM
;
177 s
->mac_flags
&= ~SSL_MAC_FLAG_READ_MAC_STREAM
;
179 if (s
->enc_read_ctx
!= NULL
) {
181 } else if ((s
->enc_read_ctx
= EVP_CIPHER_CTX_new()) == NULL
) {
182 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
183 ERR_R_MALLOC_FAILURE
);
187 * make sure it's initialised in case we exit later with an error
189 EVP_CIPHER_CTX_reset(s
->enc_read_ctx
);
191 dd
= s
->enc_read_ctx
;
192 mac_ctx
= ssl_replace_hash(&s
->read_hash
, NULL
);
193 if (mac_ctx
== NULL
) {
194 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
195 ERR_R_INTERNAL_ERROR
);
198 #ifndef OPENSSL_NO_COMP
199 COMP_CTX_free(s
->expand
);
202 s
->expand
= COMP_CTX_new(comp
->method
);
203 if (s
->expand
== NULL
) {
204 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
205 SSL_F_TLS1_CHANGE_CIPHER_STATE
,
206 SSL_R_COMPRESSION_LIBRARY_ERROR
);
212 * this is done by dtls1_reset_seq_numbers for DTLS
215 RECORD_LAYER_reset_read_sequence(&s
->rlayer
);
216 mac_secret
= &(s
->s3
.read_mac_secret
[0]);
217 mac_secret_size
= &(s
->s3
.read_mac_secret_size
);
219 s
->statem
.enc_write_state
= ENC_WRITE_STATE_INVALID
;
221 s
->s3
.flags
|= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE
;
223 s
->s3
.flags
&= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE
;
225 if (s
->s3
.tmp
.new_cipher
->algorithm2
& TLS1_STREAM_MAC
)
226 s
->mac_flags
|= SSL_MAC_FLAG_WRITE_MAC_STREAM
;
228 s
->mac_flags
&= ~SSL_MAC_FLAG_WRITE_MAC_STREAM
;
229 if (s
->enc_write_ctx
!= NULL
&& !SSL_IS_DTLS(s
)) {
231 } else if ((s
->enc_write_ctx
= EVP_CIPHER_CTX_new()) == NULL
) {
232 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
233 ERR_R_MALLOC_FAILURE
);
236 dd
= s
->enc_write_ctx
;
237 if (SSL_IS_DTLS(s
)) {
238 mac_ctx
= EVP_MD_CTX_new();
239 if (mac_ctx
== NULL
) {
240 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
241 SSL_F_TLS1_CHANGE_CIPHER_STATE
,
242 ERR_R_MALLOC_FAILURE
);
245 s
->write_hash
= mac_ctx
;
247 mac_ctx
= ssl_replace_hash(&s
->write_hash
, NULL
);
248 if (mac_ctx
== NULL
) {
249 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
250 SSL_F_TLS1_CHANGE_CIPHER_STATE
,
251 ERR_R_MALLOC_FAILURE
);
255 #ifndef OPENSSL_NO_COMP
256 COMP_CTX_free(s
->compress
);
259 s
->compress
= COMP_CTX_new(comp
->method
);
260 if (s
->compress
== NULL
) {
261 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
262 SSL_F_TLS1_CHANGE_CIPHER_STATE
,
263 SSL_R_COMPRESSION_LIBRARY_ERROR
);
269 * this is done by dtls1_reset_seq_numbers for DTLS
272 RECORD_LAYER_reset_write_sequence(&s
->rlayer
);
273 mac_secret
= &(s
->s3
.write_mac_secret
[0]);
274 mac_secret_size
= &(s
->s3
.write_mac_secret_size
);
278 EVP_CIPHER_CTX_reset(dd
);
280 p
= s
->s3
.tmp
.key_block
;
281 i
= *mac_secret_size
= s
->s3
.tmp
.new_mac_secret_size
;
283 /* TODO(size_t): convert me */
284 cl
= EVP_CIPHER_key_length(c
);
286 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
287 /* If GCM/CCM mode only part of IV comes from PRF */
288 if (EVP_CIPHER_mode(c
) == EVP_CIPH_GCM_MODE
)
289 k
= EVP_GCM_TLS_FIXED_IV_LEN
;
290 else if (EVP_CIPHER_mode(c
) == EVP_CIPH_CCM_MODE
)
291 k
= EVP_CCM_TLS_FIXED_IV_LEN
;
293 k
= EVP_CIPHER_iv_length(c
);
294 if ((which
== SSL3_CHANGE_CIPHER_CLIENT_WRITE
) ||
295 (which
== SSL3_CHANGE_CIPHER_SERVER_READ
)) {
312 if (n
> s
->s3
.tmp
.key_block_length
) {
313 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
314 ERR_R_INTERNAL_ERROR
);
318 memcpy(mac_secret
, ms
, i
);
320 if (!(EVP_CIPHER_flags(c
) & EVP_CIPH_FLAG_AEAD_CIPHER
)) {
321 /* TODO(size_t): Convert this function */
322 mac_key
= EVP_PKEY_new_mac_key(mac_type
, NULL
, mac_secret
,
323 (int)*mac_secret_size
);
325 || EVP_DigestSignInit(mac_ctx
, NULL
, m
, NULL
, mac_key
) <= 0) {
326 EVP_PKEY_free(mac_key
);
327 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
328 ERR_R_INTERNAL_ERROR
);
331 EVP_PKEY_free(mac_key
);
334 OSSL_TRACE_BEGIN(TLS
) {
335 BIO_printf(trc_out
, "which = %04X, mac key:\n", which
);
336 BIO_dump_indent(trc_out
, ms
, i
, 4);
337 } OSSL_TRACE_END(TLS
);
339 if (EVP_CIPHER_mode(c
) == EVP_CIPH_GCM_MODE
) {
340 if (!EVP_CipherInit_ex(dd
, c
, NULL
, key
, NULL
, (which
& SSL3_CC_WRITE
))
341 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_GCM_SET_IV_FIXED
, (int)k
,
343 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
344 ERR_R_INTERNAL_ERROR
);
347 } else if (EVP_CIPHER_mode(c
) == EVP_CIPH_CCM_MODE
) {
350 new_cipher
->algorithm_enc
& (SSL_AES128CCM8
| SSL_AES256CCM8
))
351 taglen
= EVP_CCM8_TLS_TAG_LEN
;
353 taglen
= EVP_CCM_TLS_TAG_LEN
;
354 if (!EVP_CipherInit_ex(dd
, c
, NULL
, NULL
, NULL
, (which
& SSL3_CC_WRITE
))
355 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_IVLEN
, 12, NULL
)
356 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_TAG
, taglen
, NULL
)
357 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_CCM_SET_IV_FIXED
, (int)k
, iv
)
358 || !EVP_CipherInit_ex(dd
, NULL
, NULL
, key
, NULL
, -1)) {
359 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
360 ERR_R_INTERNAL_ERROR
);
364 if (!EVP_CipherInit_ex(dd
, c
, NULL
, key
, iv
, (which
& SSL3_CC_WRITE
))) {
365 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
366 ERR_R_INTERNAL_ERROR
);
370 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
371 if ((EVP_CIPHER_flags(c
) & EVP_CIPH_FLAG_AEAD_CIPHER
) && *mac_secret_size
372 && !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_MAC_KEY
,
373 (int)*mac_secret_size
, mac_secret
)) {
374 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
375 ERR_R_INTERNAL_ERROR
);
378 #ifndef OPENSSL_NO_KTLS
382 if (((which
& SSL3_CC_READ
) && (s
->mode
& SSL_MODE_NO_KTLS_RX
))
383 || ((which
& SSL3_CC_WRITE
) && (s
->mode
& SSL_MODE_NO_KTLS_TX
)))
386 /* ktls supports only the maximum fragment size */
387 if (ssl_get_max_send_fragment(s
) != SSL3_RT_MAX_PLAIN_LENGTH
)
390 /* check that cipher is AES_GCM_128 */
391 if (EVP_CIPHER_nid(c
) != NID_aes_128_gcm
392 || EVP_CIPHER_mode(c
) != EVP_CIPH_GCM_MODE
393 || EVP_CIPHER_key_length(c
) != TLS_CIPHER_AES_GCM_128_KEY_SIZE
)
396 /* check version is 1.2 */
397 if (s
->version
!= TLS1_2_VERSION
)
400 if (which
& SSL3_CC_WRITE
)
405 if (!ossl_assert(bio
!= NULL
)) {
406 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
407 ERR_R_INTERNAL_ERROR
);
411 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
412 if (which
& SSL3_CC_WRITE
) {
413 if (BIO_flush(bio
) <= 0)
417 /* ktls doesn't support renegotiation */
418 if ((BIO_get_ktls_send(s
->wbio
) && (which
& SSL3_CC_WRITE
)) ||
419 (BIO_get_ktls_recv(s
->rbio
) && (which
& SSL3_CC_READ
))) {
420 SSLfatal(s
, SSL_AD_NO_RENEGOTIATION
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
421 ERR_R_INTERNAL_ERROR
);
425 memset(&crypto_info
, 0, sizeof(crypto_info
));
426 crypto_info
.info
.cipher_type
= TLS_CIPHER_AES_GCM_128
;
427 crypto_info
.info
.version
= s
->version
;
429 EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_GET_IV
,
430 EVP_GCM_TLS_FIXED_IV_LEN
+ EVP_GCM_TLS_EXPLICIT_IV_LEN
,
432 memcpy(crypto_info
.iv
, geniv
+ EVP_GCM_TLS_FIXED_IV_LEN
,
433 TLS_CIPHER_AES_GCM_128_IV_SIZE
);
434 memcpy(crypto_info
.salt
, geniv
, TLS_CIPHER_AES_GCM_128_SALT_SIZE
);
435 memcpy(crypto_info
.key
, key
, EVP_CIPHER_key_length(c
));
436 if (which
& SSL3_CC_WRITE
)
437 memcpy(crypto_info
.rec_seq
, &s
->rlayer
.write_sequence
,
438 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE
);
440 memcpy(crypto_info
.rec_seq
, &s
->rlayer
.read_sequence
,
441 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE
);
443 if (which
& SSL3_CC_READ
) {
444 count_unprocessed
= count_unprocessed_records(s
);
445 if (count_unprocessed
< 0)
448 /* increment the crypto_info record sequence */
449 while (count_unprocessed
) {
450 for (bit
= 7; bit
>= 0; bit
--) { /* increment */
451 ++crypto_info
.rec_seq
[bit
];
452 if (crypto_info
.rec_seq
[bit
] != 0)
459 /* ktls works with user provided buffers directly */
460 if (BIO_set_ktls(bio
, &crypto_info
, which
& SSL3_CC_WRITE
)) {
461 if (which
& SSL3_CC_WRITE
)
462 ssl3_release_write_buffer(s
);
463 SSL_set_options(s
, SSL_OP_NO_RENEGOTIATION
);
467 #endif /* OPENSSL_NO_KTLS */
468 s
->statem
.enc_write_state
= ENC_WRITE_STATE_VALID
;
470 OSSL_TRACE_BEGIN(TLS
) {
471 BIO_printf(trc_out
, "which = %04X, key:\n", which
);
472 BIO_dump_indent(trc_out
, key
, EVP_CIPHER_key_length(c
), 4);
473 BIO_printf(trc_out
, "iv:\n");
474 BIO_dump_indent(trc_out
, iv
, k
, 4);
475 } OSSL_TRACE_END(TLS
);
482 int tls1_setup_key_block(SSL
*s
)
488 int mac_type
= NID_undef
;
489 size_t num
, mac_secret_size
= 0;
492 if (s
->s3
.tmp
.key_block_length
!= 0)
495 if (!ssl_cipher_get_evp(s
->session
, &c
, &hash
, &mac_type
, &mac_secret_size
,
496 &comp
, s
->ext
.use_etm
)) {
497 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_SETUP_KEY_BLOCK
,
498 SSL_R_CIPHER_OR_HASH_UNAVAILABLE
);
502 s
->s3
.tmp
.new_sym_enc
= c
;
503 s
->s3
.tmp
.new_hash
= hash
;
504 s
->s3
.tmp
.new_mac_pkey_type
= mac_type
;
505 s
->s3
.tmp
.new_mac_secret_size
= mac_secret_size
;
506 num
= EVP_CIPHER_key_length(c
) + mac_secret_size
+ EVP_CIPHER_iv_length(c
);
509 ssl3_cleanup_key_block(s
);
511 if ((p
= OPENSSL_malloc(num
)) == NULL
) {
512 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_SETUP_KEY_BLOCK
,
513 ERR_R_MALLOC_FAILURE
);
517 s
->s3
.tmp
.key_block_length
= num
;
518 s
->s3
.tmp
.key_block
= p
;
520 OSSL_TRACE_BEGIN(TLS
) {
521 BIO_printf(trc_out
, "client random\n");
522 BIO_dump_indent(trc_out
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
, 4);
523 BIO_printf(trc_out
, "server random\n");
524 BIO_dump_indent(trc_out
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
, 4);
525 BIO_printf(trc_out
, "master key\n");
526 BIO_dump_indent(trc_out
,
527 s
->session
->master_key
,
528 s
->session
->master_key_length
, 4);
529 } OSSL_TRACE_END(TLS
);
531 if (!tls1_generate_key_block(s
, p
, num
)) {
532 /* SSLfatal() already called */
536 OSSL_TRACE_BEGIN(TLS
) {
537 BIO_printf(trc_out
, "key block\n");
538 BIO_dump_indent(trc_out
, p
, num
, 4);
539 } OSSL_TRACE_END(TLS
);
541 if (!(s
->options
& SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
)
542 && s
->method
->version
<= TLS1_VERSION
) {
544 * enable vulnerability countermeasure for CBC ciphers with known-IV
545 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
547 s
->s3
.need_empty_fragments
= 1;
549 if (s
->session
->cipher
!= NULL
) {
550 if (s
->session
->cipher
->algorithm_enc
== SSL_eNULL
)
551 s
->s3
.need_empty_fragments
= 0;
553 #ifndef OPENSSL_NO_RC4
554 if (s
->session
->cipher
->algorithm_enc
== SSL_RC4
)
555 s
->s3
.need_empty_fragments
= 0;
565 size_t tls1_final_finish_mac(SSL
*s
, const char *str
, size_t slen
,
569 unsigned char hash
[EVP_MAX_MD_SIZE
];
571 if (!ssl3_digest_cached_records(s
, 0)) {
572 /* SSLfatal() already called */
576 if (!ssl_handshake_hash(s
, hash
, sizeof(hash
), &hashlen
)) {
577 /* SSLfatal() already called */
581 if (!tls1_PRF(s
, str
, slen
, hash
, hashlen
, NULL
, 0, NULL
, 0, NULL
, 0,
582 s
->session
->master_key
, s
->session
->master_key_length
,
583 out
, TLS1_FINISH_MAC_LENGTH
, 1)) {
584 /* SSLfatal() already called */
587 OPENSSL_cleanse(hash
, hashlen
);
588 return TLS1_FINISH_MAC_LENGTH
;
591 int tls1_generate_master_secret(SSL
*s
, unsigned char *out
, unsigned char *p
,
592 size_t len
, size_t *secret_size
)
594 if (s
->session
->flags
& SSL_SESS_FLAG_EXTMS
) {
595 unsigned char hash
[EVP_MAX_MD_SIZE
* 2];
598 * Digest cached records keeping record buffer (if present): this wont
599 * affect client auth because we're freezing the buffer at the same
600 * point (after client key exchange and before certificate verify)
602 if (!ssl3_digest_cached_records(s
, 1)
603 || !ssl_handshake_hash(s
, hash
, sizeof(hash
), &hashlen
)) {
604 /* SSLfatal() already called */
607 OSSL_TRACE_BEGIN(TLS
) {
608 BIO_printf(trc_out
, "Handshake hashes:\n");
609 BIO_dump(trc_out
, (char *)hash
, hashlen
);
610 } OSSL_TRACE_END(TLS
);
612 TLS_MD_EXTENDED_MASTER_SECRET_CONST
,
613 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE
,
617 NULL
, 0, p
, len
, out
,
618 SSL3_MASTER_SECRET_SIZE
, 1)) {
619 /* SSLfatal() already called */
622 OPENSSL_cleanse(hash
, hashlen
);
625 TLS_MD_MASTER_SECRET_CONST
,
626 TLS_MD_MASTER_SECRET_CONST_SIZE
,
627 s
->s3
.client_random
, SSL3_RANDOM_SIZE
,
629 s
->s3
.server_random
, SSL3_RANDOM_SIZE
,
630 NULL
, 0, p
, len
, out
,
631 SSL3_MASTER_SECRET_SIZE
, 1)) {
632 /* SSLfatal() already called */
637 OSSL_TRACE_BEGIN(TLS
) {
638 BIO_printf(trc_out
, "Premaster Secret:\n");
639 BIO_dump_indent(trc_out
, p
, len
, 4);
640 BIO_printf(trc_out
, "Client Random:\n");
641 BIO_dump_indent(trc_out
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
, 4);
642 BIO_printf(trc_out
, "Server Random:\n");
643 BIO_dump_indent(trc_out
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
, 4);
644 BIO_printf(trc_out
, "Master Secret:\n");
645 BIO_dump_indent(trc_out
,
646 s
->session
->master_key
,
647 SSL3_MASTER_SECRET_SIZE
, 4);
648 } OSSL_TRACE_END(TLS
);
650 *secret_size
= SSL3_MASTER_SECRET_SIZE
;
654 int tls1_export_keying_material(SSL
*s
, unsigned char *out
, size_t olen
,
655 const char *label
, size_t llen
,
656 const unsigned char *context
,
657 size_t contextlen
, int use_context
)
659 unsigned char *val
= NULL
;
660 size_t vallen
= 0, currentvalpos
;
664 * construct PRF arguments we construct the PRF argument ourself rather
665 * than passing separate values into the TLS PRF to ensure that the
666 * concatenation of values does not create a prohibited label.
668 vallen
= llen
+ SSL3_RANDOM_SIZE
* 2;
670 vallen
+= 2 + contextlen
;
673 val
= OPENSSL_malloc(vallen
);
677 memcpy(val
+ currentvalpos
, (unsigned char *)label
, llen
);
678 currentvalpos
+= llen
;
679 memcpy(val
+ currentvalpos
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
);
680 currentvalpos
+= SSL3_RANDOM_SIZE
;
681 memcpy(val
+ currentvalpos
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
);
682 currentvalpos
+= SSL3_RANDOM_SIZE
;
685 val
[currentvalpos
] = (contextlen
>> 8) & 0xff;
687 val
[currentvalpos
] = contextlen
& 0xff;
689 if ((contextlen
> 0) || (context
!= NULL
)) {
690 memcpy(val
+ currentvalpos
, context
, contextlen
);
695 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
696 * label len) = 15, so size of val > max(prohibited label len) = 15 and
697 * the comparisons won't have buffer overflow
699 if (memcmp(val
, TLS_MD_CLIENT_FINISH_CONST
,
700 TLS_MD_CLIENT_FINISH_CONST_SIZE
) == 0)
702 if (memcmp(val
, TLS_MD_SERVER_FINISH_CONST
,
703 TLS_MD_SERVER_FINISH_CONST_SIZE
) == 0)
705 if (memcmp(val
, TLS_MD_MASTER_SECRET_CONST
,
706 TLS_MD_MASTER_SECRET_CONST_SIZE
) == 0)
708 if (memcmp(val
, TLS_MD_EXTENDED_MASTER_SECRET_CONST
,
709 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE
) == 0)
711 if (memcmp(val
, TLS_MD_KEY_EXPANSION_CONST
,
712 TLS_MD_KEY_EXPANSION_CONST_SIZE
) == 0)
721 s
->session
->master_key
, s
->session
->master_key_length
,
726 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL
, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL
);
730 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL
, ERR_R_MALLOC_FAILURE
);
733 OPENSSL_clear_free(val
, vallen
);
737 int tls1_alert_code(int code
)
740 case SSL_AD_CLOSE_NOTIFY
:
741 return SSL3_AD_CLOSE_NOTIFY
;
742 case SSL_AD_UNEXPECTED_MESSAGE
:
743 return SSL3_AD_UNEXPECTED_MESSAGE
;
744 case SSL_AD_BAD_RECORD_MAC
:
745 return SSL3_AD_BAD_RECORD_MAC
;
746 case SSL_AD_DECRYPTION_FAILED
:
747 return TLS1_AD_DECRYPTION_FAILED
;
748 case SSL_AD_RECORD_OVERFLOW
:
749 return TLS1_AD_RECORD_OVERFLOW
;
750 case SSL_AD_DECOMPRESSION_FAILURE
:
751 return SSL3_AD_DECOMPRESSION_FAILURE
;
752 case SSL_AD_HANDSHAKE_FAILURE
:
753 return SSL3_AD_HANDSHAKE_FAILURE
;
754 case SSL_AD_NO_CERTIFICATE
:
756 case SSL_AD_BAD_CERTIFICATE
:
757 return SSL3_AD_BAD_CERTIFICATE
;
758 case SSL_AD_UNSUPPORTED_CERTIFICATE
:
759 return SSL3_AD_UNSUPPORTED_CERTIFICATE
;
760 case SSL_AD_CERTIFICATE_REVOKED
:
761 return SSL3_AD_CERTIFICATE_REVOKED
;
762 case SSL_AD_CERTIFICATE_EXPIRED
:
763 return SSL3_AD_CERTIFICATE_EXPIRED
;
764 case SSL_AD_CERTIFICATE_UNKNOWN
:
765 return SSL3_AD_CERTIFICATE_UNKNOWN
;
766 case SSL_AD_ILLEGAL_PARAMETER
:
767 return SSL3_AD_ILLEGAL_PARAMETER
;
768 case SSL_AD_UNKNOWN_CA
:
769 return TLS1_AD_UNKNOWN_CA
;
770 case SSL_AD_ACCESS_DENIED
:
771 return TLS1_AD_ACCESS_DENIED
;
772 case SSL_AD_DECODE_ERROR
:
773 return TLS1_AD_DECODE_ERROR
;
774 case SSL_AD_DECRYPT_ERROR
:
775 return TLS1_AD_DECRYPT_ERROR
;
776 case SSL_AD_EXPORT_RESTRICTION
:
777 return TLS1_AD_EXPORT_RESTRICTION
;
778 case SSL_AD_PROTOCOL_VERSION
:
779 return TLS1_AD_PROTOCOL_VERSION
;
780 case SSL_AD_INSUFFICIENT_SECURITY
:
781 return TLS1_AD_INSUFFICIENT_SECURITY
;
782 case SSL_AD_INTERNAL_ERROR
:
783 return TLS1_AD_INTERNAL_ERROR
;
784 case SSL_AD_USER_CANCELLED
:
785 return TLS1_AD_USER_CANCELLED
;
786 case SSL_AD_NO_RENEGOTIATION
:
787 return TLS1_AD_NO_RENEGOTIATION
;
788 case SSL_AD_UNSUPPORTED_EXTENSION
:
789 return TLS1_AD_UNSUPPORTED_EXTENSION
;
790 case SSL_AD_CERTIFICATE_UNOBTAINABLE
:
791 return TLS1_AD_CERTIFICATE_UNOBTAINABLE
;
792 case SSL_AD_UNRECOGNIZED_NAME
:
793 return TLS1_AD_UNRECOGNIZED_NAME
;
794 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE
:
795 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE
;
796 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE
:
797 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE
;
798 case SSL_AD_UNKNOWN_PSK_IDENTITY
:
799 return TLS1_AD_UNKNOWN_PSK_IDENTITY
;
800 case SSL_AD_INAPPROPRIATE_FALLBACK
:
801 return TLS1_AD_INAPPROPRIATE_FALLBACK
;
802 case SSL_AD_NO_APPLICATION_PROTOCOL
:
803 return TLS1_AD_NO_APPLICATION_PROTOCOL
;
804 case SSL_AD_CERTIFICATE_REQUIRED
:
805 return SSL_AD_HANDSHAKE_FAILURE
;