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 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
155 struct tls_enable crypto_info
;
157 struct tls12_crypto_info_aes_gcm_128 crypto_info
;
158 unsigned char geniv
[12];
159 int count_unprocessed
;
165 c
= s
->s3
.tmp
.new_sym_enc
;
166 m
= s
->s3
.tmp
.new_hash
;
167 mac_type
= s
->s3
.tmp
.new_mac_pkey_type
;
168 #ifndef OPENSSL_NO_COMP
169 comp
= s
->s3
.tmp
.new_compression
;
172 if (which
& SSL3_CC_READ
) {
174 s
->s3
.flags
|= TLS1_FLAGS_ENCRYPT_THEN_MAC_READ
;
176 s
->s3
.flags
&= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_READ
;
178 if (s
->s3
.tmp
.new_cipher
->algorithm2
& TLS1_STREAM_MAC
)
179 s
->mac_flags
|= SSL_MAC_FLAG_READ_MAC_STREAM
;
181 s
->mac_flags
&= ~SSL_MAC_FLAG_READ_MAC_STREAM
;
183 if (s
->enc_read_ctx
!= NULL
) {
185 } else if ((s
->enc_read_ctx
= EVP_CIPHER_CTX_new()) == NULL
) {
186 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
187 ERR_R_MALLOC_FAILURE
);
191 * make sure it's initialised in case we exit later with an error
193 EVP_CIPHER_CTX_reset(s
->enc_read_ctx
);
195 dd
= s
->enc_read_ctx
;
196 mac_ctx
= ssl_replace_hash(&s
->read_hash
, NULL
);
197 if (mac_ctx
== NULL
) {
198 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
199 ERR_R_INTERNAL_ERROR
);
202 #ifndef OPENSSL_NO_COMP
203 COMP_CTX_free(s
->expand
);
206 s
->expand
= COMP_CTX_new(comp
->method
);
207 if (s
->expand
== NULL
) {
208 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
209 SSL_F_TLS1_CHANGE_CIPHER_STATE
,
210 SSL_R_COMPRESSION_LIBRARY_ERROR
);
216 * this is done by dtls1_reset_seq_numbers for DTLS
219 RECORD_LAYER_reset_read_sequence(&s
->rlayer
);
220 mac_secret
= &(s
->s3
.read_mac_secret
[0]);
221 mac_secret_size
= &(s
->s3
.read_mac_secret_size
);
223 s
->statem
.enc_write_state
= ENC_WRITE_STATE_INVALID
;
225 s
->s3
.flags
|= TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE
;
227 s
->s3
.flags
&= ~TLS1_FLAGS_ENCRYPT_THEN_MAC_WRITE
;
229 if (s
->s3
.tmp
.new_cipher
->algorithm2
& TLS1_STREAM_MAC
)
230 s
->mac_flags
|= SSL_MAC_FLAG_WRITE_MAC_STREAM
;
232 s
->mac_flags
&= ~SSL_MAC_FLAG_WRITE_MAC_STREAM
;
233 if (s
->enc_write_ctx
!= NULL
&& !SSL_IS_DTLS(s
)) {
235 } else if ((s
->enc_write_ctx
= EVP_CIPHER_CTX_new()) == NULL
) {
236 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
237 ERR_R_MALLOC_FAILURE
);
240 dd
= s
->enc_write_ctx
;
241 if (SSL_IS_DTLS(s
)) {
242 mac_ctx
= EVP_MD_CTX_new();
243 if (mac_ctx
== NULL
) {
244 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
245 SSL_F_TLS1_CHANGE_CIPHER_STATE
,
246 ERR_R_MALLOC_FAILURE
);
249 s
->write_hash
= mac_ctx
;
251 mac_ctx
= ssl_replace_hash(&s
->write_hash
, NULL
);
252 if (mac_ctx
== NULL
) {
253 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
254 SSL_F_TLS1_CHANGE_CIPHER_STATE
,
255 ERR_R_MALLOC_FAILURE
);
259 #ifndef OPENSSL_NO_COMP
260 COMP_CTX_free(s
->compress
);
263 s
->compress
= COMP_CTX_new(comp
->method
);
264 if (s
->compress
== NULL
) {
265 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
266 SSL_F_TLS1_CHANGE_CIPHER_STATE
,
267 SSL_R_COMPRESSION_LIBRARY_ERROR
);
273 * this is done by dtls1_reset_seq_numbers for DTLS
276 RECORD_LAYER_reset_write_sequence(&s
->rlayer
);
277 mac_secret
= &(s
->s3
.write_mac_secret
[0]);
278 mac_secret_size
= &(s
->s3
.write_mac_secret_size
);
282 EVP_CIPHER_CTX_reset(dd
);
284 p
= s
->s3
.tmp
.key_block
;
285 i
= *mac_secret_size
= s
->s3
.tmp
.new_mac_secret_size
;
287 /* TODO(size_t): convert me */
288 cl
= EVP_CIPHER_key_length(c
);
290 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
291 /* If GCM/CCM mode only part of IV comes from PRF */
292 if (EVP_CIPHER_mode(c
) == EVP_CIPH_GCM_MODE
)
293 k
= EVP_GCM_TLS_FIXED_IV_LEN
;
294 else if (EVP_CIPHER_mode(c
) == EVP_CIPH_CCM_MODE
)
295 k
= EVP_CCM_TLS_FIXED_IV_LEN
;
297 k
= EVP_CIPHER_iv_length(c
);
298 if ((which
== SSL3_CHANGE_CIPHER_CLIENT_WRITE
) ||
299 (which
== SSL3_CHANGE_CIPHER_SERVER_READ
)) {
316 if (n
> s
->s3
.tmp
.key_block_length
) {
317 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
318 ERR_R_INTERNAL_ERROR
);
322 memcpy(mac_secret
, ms
, i
);
324 if (!(EVP_CIPHER_flags(c
) & EVP_CIPH_FLAG_AEAD_CIPHER
)) {
325 /* TODO(size_t): Convert this function */
326 mac_key
= EVP_PKEY_new_mac_key(mac_type
, NULL
, mac_secret
,
327 (int)*mac_secret_size
);
329 || EVP_DigestSignInit_ex(mac_ctx
, NULL
,
330 EVP_MD_name(m
), s
->ctx
->propq
,
331 mac_key
, s
->ctx
->libctx
) <= 0) {
332 EVP_PKEY_free(mac_key
);
333 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
334 ERR_R_INTERNAL_ERROR
);
337 EVP_PKEY_free(mac_key
);
340 OSSL_TRACE_BEGIN(TLS
) {
341 BIO_printf(trc_out
, "which = %04X, mac key:\n", which
);
342 BIO_dump_indent(trc_out
, ms
, i
, 4);
343 } OSSL_TRACE_END(TLS
);
345 if (EVP_CIPHER_mode(c
) == EVP_CIPH_GCM_MODE
) {
346 if (!EVP_CipherInit_ex(dd
, c
, NULL
, key
, NULL
, (which
& SSL3_CC_WRITE
))
347 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_GCM_SET_IV_FIXED
, (int)k
,
349 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
350 ERR_R_INTERNAL_ERROR
);
353 } else if (EVP_CIPHER_mode(c
) == EVP_CIPH_CCM_MODE
) {
356 new_cipher
->algorithm_enc
& (SSL_AES128CCM8
| SSL_AES256CCM8
))
357 taglen
= EVP_CCM8_TLS_TAG_LEN
;
359 taglen
= EVP_CCM_TLS_TAG_LEN
;
360 if (!EVP_CipherInit_ex(dd
, c
, NULL
, NULL
, NULL
, (which
& SSL3_CC_WRITE
))
361 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_IVLEN
, 12, NULL
)
362 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_TAG
, taglen
, NULL
)
363 || !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_CCM_SET_IV_FIXED
, (int)k
, iv
)
364 || !EVP_CipherInit_ex(dd
, NULL
, NULL
, key
, NULL
, -1)) {
365 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
366 ERR_R_INTERNAL_ERROR
);
370 if (!EVP_CipherInit_ex(dd
, c
, NULL
, key
, iv
, (which
& SSL3_CC_WRITE
))) {
371 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
372 ERR_R_INTERNAL_ERROR
);
376 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
377 if ((EVP_CIPHER_flags(c
) & EVP_CIPH_FLAG_AEAD_CIPHER
) && *mac_secret_size
378 && !EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_AEAD_SET_MAC_KEY
,
379 (int)*mac_secret_size
, mac_secret
)) {
380 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
381 ERR_R_INTERNAL_ERROR
);
384 #ifndef OPENSSL_NO_KTLS
388 if (((which
& SSL3_CC_READ
) && (s
->mode
& SSL_MODE_NO_KTLS_RX
))
389 || ((which
& SSL3_CC_WRITE
) && (s
->mode
& SSL_MODE_NO_KTLS_TX
)))
392 /* ktls supports only the maximum fragment size */
393 if (ssl_get_max_send_fragment(s
) != SSL3_RT_MAX_PLAIN_LENGTH
)
397 memset(&crypto_info
, 0, sizeof(crypto_info
));
398 switch (s
->s3
.tmp
.new_cipher
->algorithm_enc
) {
401 crypto_info
.cipher_algorithm
= CRYPTO_AES_NIST_GCM_16
;
402 crypto_info
.iv_len
= EVP_GCM_TLS_FIXED_IV_LEN
;
408 switch (s
->s3
.tmp
.new_cipher
->algorithm_mac
) {
410 crypto_info
.auth_algorithm
= CRYPTO_SHA1_HMAC
;
413 crypto_info
.auth_algorithm
= CRYPTO_SHA2_256_HMAC
;
416 crypto_info
.auth_algorithm
= CRYPTO_SHA2_384_HMAC
;
421 crypto_info
.cipher_algorithm
= CRYPTO_AES_CBC
;
422 crypto_info
.iv_len
= EVP_CIPHER_iv_length(c
);
423 crypto_info
.auth_key
= ms
;
424 crypto_info
.auth_key_len
= *mac_secret_size
;
429 crypto_info
.cipher_key
= key
;
430 crypto_info
.cipher_key_len
= EVP_CIPHER_key_length(c
);
432 crypto_info
.tls_vmajor
= (s
->version
>> 8) & 0x000000ff;
433 crypto_info
.tls_vminor
= (s
->version
& 0x000000ff);
435 /* check that cipher is AES_GCM_128 */
436 if (EVP_CIPHER_nid(c
) != NID_aes_128_gcm
437 || EVP_CIPHER_mode(c
) != EVP_CIPH_GCM_MODE
438 || EVP_CIPHER_key_length(c
) != TLS_CIPHER_AES_GCM_128_KEY_SIZE
)
441 /* check version is 1.2 */
442 if (s
->version
!= TLS1_2_VERSION
)
446 if (which
& SSL3_CC_WRITE
)
451 if (!ossl_assert(bio
!= NULL
)) {
452 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
453 ERR_R_INTERNAL_ERROR
);
457 /* All future data will get encrypted by ktls. Flush the BIO or skip ktls */
458 if (which
& SSL3_CC_WRITE
) {
459 if (BIO_flush(bio
) <= 0)
463 /* ktls doesn't support renegotiation */
464 if ((BIO_get_ktls_send(s
->wbio
) && (which
& SSL3_CC_WRITE
)) ||
465 (BIO_get_ktls_recv(s
->rbio
) && (which
& SSL3_CC_READ
))) {
466 SSLfatal(s
, SSL_AD_NO_RENEGOTIATION
, SSL_F_TLS1_CHANGE_CIPHER_STATE
,
467 ERR_R_INTERNAL_ERROR
);
472 memset(&crypto_info
, 0, sizeof(crypto_info
));
473 crypto_info
.info
.cipher_type
= TLS_CIPHER_AES_GCM_128
;
474 crypto_info
.info
.version
= s
->version
;
476 EVP_CIPHER_CTX_ctrl(dd
, EVP_CTRL_GET_IV
,
477 EVP_GCM_TLS_FIXED_IV_LEN
+ EVP_GCM_TLS_EXPLICIT_IV_LEN
,
479 memcpy(crypto_info
.iv
, geniv
+ EVP_GCM_TLS_FIXED_IV_LEN
,
480 TLS_CIPHER_AES_GCM_128_IV_SIZE
);
481 memcpy(crypto_info
.salt
, geniv
, TLS_CIPHER_AES_GCM_128_SALT_SIZE
);
482 memcpy(crypto_info
.key
, key
, EVP_CIPHER_key_length(c
));
483 if (which
& SSL3_CC_WRITE
)
484 memcpy(crypto_info
.rec_seq
, &s
->rlayer
.write_sequence
,
485 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE
);
487 memcpy(crypto_info
.rec_seq
, &s
->rlayer
.read_sequence
,
488 TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE
);
490 if (which
& SSL3_CC_READ
) {
491 count_unprocessed
= count_unprocessed_records(s
);
492 if (count_unprocessed
< 0)
495 /* increment the crypto_info record sequence */
496 while (count_unprocessed
) {
497 for (bit
= 7; bit
>= 0; bit
--) { /* increment */
498 ++crypto_info
.rec_seq
[bit
];
499 if (crypto_info
.rec_seq
[bit
] != 0)
507 /* ktls works with user provided buffers directly */
508 if (BIO_set_ktls(bio
, &crypto_info
, which
& SSL3_CC_WRITE
)) {
509 if (which
& SSL3_CC_WRITE
)
510 ssl3_release_write_buffer(s
);
511 SSL_set_options(s
, SSL_OP_NO_RENEGOTIATION
);
515 #endif /* OPENSSL_NO_KTLS */
516 s
->statem
.enc_write_state
= ENC_WRITE_STATE_VALID
;
518 OSSL_TRACE_BEGIN(TLS
) {
519 BIO_printf(trc_out
, "which = %04X, key:\n", which
);
520 BIO_dump_indent(trc_out
, key
, EVP_CIPHER_key_length(c
), 4);
521 BIO_printf(trc_out
, "iv:\n");
522 BIO_dump_indent(trc_out
, iv
, k
, 4);
523 } OSSL_TRACE_END(TLS
);
530 int tls1_setup_key_block(SSL
*s
)
536 int mac_type
= NID_undef
;
537 size_t num
, mac_secret_size
= 0;
540 if (s
->s3
.tmp
.key_block_length
!= 0)
543 if (!ssl_cipher_get_evp(s
->ctx
, s
->session
, &c
, &hash
, &mac_type
,
544 &mac_secret_size
, &comp
, s
->ext
.use_etm
)) {
545 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_SETUP_KEY_BLOCK
,
546 SSL_R_CIPHER_OR_HASH_UNAVAILABLE
);
550 ssl_evp_cipher_free(s
->s3
.tmp
.new_sym_enc
);
551 s
->s3
.tmp
.new_sym_enc
= c
;
552 ssl_evp_md_free(s
->s3
.tmp
.new_hash
);
553 s
->s3
.tmp
.new_hash
= hash
;
554 s
->s3
.tmp
.new_mac_pkey_type
= mac_type
;
555 s
->s3
.tmp
.new_mac_secret_size
= mac_secret_size
;
556 num
= EVP_CIPHER_key_length(c
) + mac_secret_size
+ EVP_CIPHER_iv_length(c
);
559 ssl3_cleanup_key_block(s
);
561 if ((p
= OPENSSL_malloc(num
)) == NULL
) {
562 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS1_SETUP_KEY_BLOCK
,
563 ERR_R_MALLOC_FAILURE
);
567 s
->s3
.tmp
.key_block_length
= num
;
568 s
->s3
.tmp
.key_block
= p
;
570 OSSL_TRACE_BEGIN(TLS
) {
571 BIO_printf(trc_out
, "client random\n");
572 BIO_dump_indent(trc_out
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
, 4);
573 BIO_printf(trc_out
, "server random\n");
574 BIO_dump_indent(trc_out
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
, 4);
575 BIO_printf(trc_out
, "master key\n");
576 BIO_dump_indent(trc_out
,
577 s
->session
->master_key
,
578 s
->session
->master_key_length
, 4);
579 } OSSL_TRACE_END(TLS
);
581 if (!tls1_generate_key_block(s
, p
, num
)) {
582 /* SSLfatal() already called */
586 OSSL_TRACE_BEGIN(TLS
) {
587 BIO_printf(trc_out
, "key block\n");
588 BIO_dump_indent(trc_out
, p
, num
, 4);
589 } OSSL_TRACE_END(TLS
);
591 if (!(s
->options
& SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
)
592 && s
->method
->version
<= TLS1_VERSION
) {
594 * enable vulnerability countermeasure for CBC ciphers with known-IV
595 * problem (http://www.openssl.org/~bodo/tls-cbc.txt)
597 s
->s3
.need_empty_fragments
= 1;
599 if (s
->session
->cipher
!= NULL
) {
600 if (s
->session
->cipher
->algorithm_enc
== SSL_eNULL
)
601 s
->s3
.need_empty_fragments
= 0;
603 #ifndef OPENSSL_NO_RC4
604 if (s
->session
->cipher
->algorithm_enc
== SSL_RC4
)
605 s
->s3
.need_empty_fragments
= 0;
615 size_t tls1_final_finish_mac(SSL
*s
, const char *str
, size_t slen
,
619 unsigned char hash
[EVP_MAX_MD_SIZE
];
621 if (!ssl3_digest_cached_records(s
, 0)) {
622 /* SSLfatal() already called */
626 if (!ssl_handshake_hash(s
, hash
, sizeof(hash
), &hashlen
)) {
627 /* SSLfatal() already called */
631 if (!tls1_PRF(s
, str
, slen
, hash
, hashlen
, NULL
, 0, NULL
, 0, NULL
, 0,
632 s
->session
->master_key
, s
->session
->master_key_length
,
633 out
, TLS1_FINISH_MAC_LENGTH
, 1)) {
634 /* SSLfatal() already called */
637 OPENSSL_cleanse(hash
, hashlen
);
638 return TLS1_FINISH_MAC_LENGTH
;
641 int tls1_generate_master_secret(SSL
*s
, unsigned char *out
, unsigned char *p
,
642 size_t len
, size_t *secret_size
)
644 if (s
->session
->flags
& SSL_SESS_FLAG_EXTMS
) {
645 unsigned char hash
[EVP_MAX_MD_SIZE
* 2];
648 * Digest cached records keeping record buffer (if present): this won't
649 * affect client auth because we're freezing the buffer at the same
650 * point (after client key exchange and before certificate verify)
652 if (!ssl3_digest_cached_records(s
, 1)
653 || !ssl_handshake_hash(s
, hash
, sizeof(hash
), &hashlen
)) {
654 /* SSLfatal() already called */
657 OSSL_TRACE_BEGIN(TLS
) {
658 BIO_printf(trc_out
, "Handshake hashes:\n");
659 BIO_dump(trc_out
, (char *)hash
, hashlen
);
660 } OSSL_TRACE_END(TLS
);
662 TLS_MD_EXTENDED_MASTER_SECRET_CONST
,
663 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE
,
667 NULL
, 0, p
, len
, out
,
668 SSL3_MASTER_SECRET_SIZE
, 1)) {
669 /* SSLfatal() already called */
672 OPENSSL_cleanse(hash
, hashlen
);
675 TLS_MD_MASTER_SECRET_CONST
,
676 TLS_MD_MASTER_SECRET_CONST_SIZE
,
677 s
->s3
.client_random
, SSL3_RANDOM_SIZE
,
679 s
->s3
.server_random
, SSL3_RANDOM_SIZE
,
680 NULL
, 0, p
, len
, out
,
681 SSL3_MASTER_SECRET_SIZE
, 1)) {
682 /* SSLfatal() already called */
687 OSSL_TRACE_BEGIN(TLS
) {
688 BIO_printf(trc_out
, "Premaster Secret:\n");
689 BIO_dump_indent(trc_out
, p
, len
, 4);
690 BIO_printf(trc_out
, "Client Random:\n");
691 BIO_dump_indent(trc_out
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
, 4);
692 BIO_printf(trc_out
, "Server Random:\n");
693 BIO_dump_indent(trc_out
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
, 4);
694 BIO_printf(trc_out
, "Master Secret:\n");
695 BIO_dump_indent(trc_out
,
696 s
->session
->master_key
,
697 SSL3_MASTER_SECRET_SIZE
, 4);
698 } OSSL_TRACE_END(TLS
);
700 *secret_size
= SSL3_MASTER_SECRET_SIZE
;
704 int tls1_export_keying_material(SSL
*s
, unsigned char *out
, size_t olen
,
705 const char *label
, size_t llen
,
706 const unsigned char *context
,
707 size_t contextlen
, int use_context
)
709 unsigned char *val
= NULL
;
710 size_t vallen
= 0, currentvalpos
;
714 * construct PRF arguments we construct the PRF argument ourself rather
715 * than passing separate values into the TLS PRF to ensure that the
716 * concatenation of values does not create a prohibited label.
718 vallen
= llen
+ SSL3_RANDOM_SIZE
* 2;
720 vallen
+= 2 + contextlen
;
723 val
= OPENSSL_malloc(vallen
);
727 memcpy(val
+ currentvalpos
, (unsigned char *)label
, llen
);
728 currentvalpos
+= llen
;
729 memcpy(val
+ currentvalpos
, s
->s3
.client_random
, SSL3_RANDOM_SIZE
);
730 currentvalpos
+= SSL3_RANDOM_SIZE
;
731 memcpy(val
+ currentvalpos
, s
->s3
.server_random
, SSL3_RANDOM_SIZE
);
732 currentvalpos
+= SSL3_RANDOM_SIZE
;
735 val
[currentvalpos
] = (contextlen
>> 8) & 0xff;
737 val
[currentvalpos
] = contextlen
& 0xff;
739 if ((contextlen
> 0) || (context
!= NULL
)) {
740 memcpy(val
+ currentvalpos
, context
, contextlen
);
745 * disallow prohibited labels note that SSL3_RANDOM_SIZE > max(prohibited
746 * label len) = 15, so size of val > max(prohibited label len) = 15 and
747 * the comparisons won't have buffer overflow
749 if (memcmp(val
, TLS_MD_CLIENT_FINISH_CONST
,
750 TLS_MD_CLIENT_FINISH_CONST_SIZE
) == 0)
752 if (memcmp(val
, TLS_MD_SERVER_FINISH_CONST
,
753 TLS_MD_SERVER_FINISH_CONST_SIZE
) == 0)
755 if (memcmp(val
, TLS_MD_MASTER_SECRET_CONST
,
756 TLS_MD_MASTER_SECRET_CONST_SIZE
) == 0)
758 if (memcmp(val
, TLS_MD_EXTENDED_MASTER_SECRET_CONST
,
759 TLS_MD_EXTENDED_MASTER_SECRET_CONST_SIZE
) == 0)
761 if (memcmp(val
, TLS_MD_KEY_EXPANSION_CONST
,
762 TLS_MD_KEY_EXPANSION_CONST_SIZE
) == 0)
771 s
->session
->master_key
, s
->session
->master_key_length
,
776 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL
, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL
);
780 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL
, ERR_R_MALLOC_FAILURE
);
783 OPENSSL_clear_free(val
, vallen
);
787 int tls1_alert_code(int code
)
790 case SSL_AD_CLOSE_NOTIFY
:
791 return SSL3_AD_CLOSE_NOTIFY
;
792 case SSL_AD_UNEXPECTED_MESSAGE
:
793 return SSL3_AD_UNEXPECTED_MESSAGE
;
794 case SSL_AD_BAD_RECORD_MAC
:
795 return SSL3_AD_BAD_RECORD_MAC
;
796 case SSL_AD_DECRYPTION_FAILED
:
797 return TLS1_AD_DECRYPTION_FAILED
;
798 case SSL_AD_RECORD_OVERFLOW
:
799 return TLS1_AD_RECORD_OVERFLOW
;
800 case SSL_AD_DECOMPRESSION_FAILURE
:
801 return SSL3_AD_DECOMPRESSION_FAILURE
;
802 case SSL_AD_HANDSHAKE_FAILURE
:
803 return SSL3_AD_HANDSHAKE_FAILURE
;
804 case SSL_AD_NO_CERTIFICATE
:
806 case SSL_AD_BAD_CERTIFICATE
:
807 return SSL3_AD_BAD_CERTIFICATE
;
808 case SSL_AD_UNSUPPORTED_CERTIFICATE
:
809 return SSL3_AD_UNSUPPORTED_CERTIFICATE
;
810 case SSL_AD_CERTIFICATE_REVOKED
:
811 return SSL3_AD_CERTIFICATE_REVOKED
;
812 case SSL_AD_CERTIFICATE_EXPIRED
:
813 return SSL3_AD_CERTIFICATE_EXPIRED
;
814 case SSL_AD_CERTIFICATE_UNKNOWN
:
815 return SSL3_AD_CERTIFICATE_UNKNOWN
;
816 case SSL_AD_ILLEGAL_PARAMETER
:
817 return SSL3_AD_ILLEGAL_PARAMETER
;
818 case SSL_AD_UNKNOWN_CA
:
819 return TLS1_AD_UNKNOWN_CA
;
820 case SSL_AD_ACCESS_DENIED
:
821 return TLS1_AD_ACCESS_DENIED
;
822 case SSL_AD_DECODE_ERROR
:
823 return TLS1_AD_DECODE_ERROR
;
824 case SSL_AD_DECRYPT_ERROR
:
825 return TLS1_AD_DECRYPT_ERROR
;
826 case SSL_AD_EXPORT_RESTRICTION
:
827 return TLS1_AD_EXPORT_RESTRICTION
;
828 case SSL_AD_PROTOCOL_VERSION
:
829 return TLS1_AD_PROTOCOL_VERSION
;
830 case SSL_AD_INSUFFICIENT_SECURITY
:
831 return TLS1_AD_INSUFFICIENT_SECURITY
;
832 case SSL_AD_INTERNAL_ERROR
:
833 return TLS1_AD_INTERNAL_ERROR
;
834 case SSL_AD_USER_CANCELLED
:
835 return TLS1_AD_USER_CANCELLED
;
836 case SSL_AD_NO_RENEGOTIATION
:
837 return TLS1_AD_NO_RENEGOTIATION
;
838 case SSL_AD_UNSUPPORTED_EXTENSION
:
839 return TLS1_AD_UNSUPPORTED_EXTENSION
;
840 case SSL_AD_CERTIFICATE_UNOBTAINABLE
:
841 return TLS1_AD_CERTIFICATE_UNOBTAINABLE
;
842 case SSL_AD_UNRECOGNIZED_NAME
:
843 return TLS1_AD_UNRECOGNIZED_NAME
;
844 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE
:
845 return TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE
;
846 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE
:
847 return TLS1_AD_BAD_CERTIFICATE_HASH_VALUE
;
848 case SSL_AD_UNKNOWN_PSK_IDENTITY
:
849 return TLS1_AD_UNKNOWN_PSK_IDENTITY
;
850 case SSL_AD_INAPPROPRIATE_FALLBACK
:
851 return TLS1_AD_INAPPROPRIATE_FALLBACK
;
852 case SSL_AD_NO_APPLICATION_PROTOCOL
:
853 return TLS1_AD_NO_APPLICATION_PROTOCOL
;
854 case SSL_AD_CERTIFICATE_REQUIRED
:
855 return SSL_AD_HANDSHAKE_FAILURE
;