2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* ====================================================================
11 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
13 * Portions of the attached software ("Contribution") are developed by
14 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
16 * The Contribution is licensed pursuant to the OpenSSL open source
17 * license provided above.
19 * ECC cipher suite support in OpenSSL originally written by
20 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
23 /* ====================================================================
24 * Copyright 2005 Nokia. All rights reserved.
26 * The portions of the attached software ("Contribution") is developed by
27 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
30 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
31 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
32 * support (see RFC 4279) to OpenSSL.
34 * No patent licenses or other rights except those expressly stated in
35 * the OpenSSL open source license shall be deemed granted or received
36 * expressly, by implication, estoppel, or otherwise.
38 * No assurances are provided by Nokia that the Contribution does not
39 * infringe the patent or other intellectual property rights of any third
40 * party or that the license provides you with all the necessary rights
41 * to make use of the Contribution.
43 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
44 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
45 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
46 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
51 #include "../ssl_locl.h"
52 #include "statem_locl.h"
53 #include <openssl/buffer.h>
54 #include <openssl/rand.h>
55 #include <openssl/objects.h>
56 #include <openssl/evp.h>
57 #include <openssl/md5.h>
58 #include <openssl/dh.h>
59 #include <openssl/bn.h>
60 #include <openssl/engine.h>
62 static ossl_inline
int cert_req_allowed(SSL
*s
);
63 static int key_exchange_expected(SSL
*s
);
64 static int ca_dn_cmp(const X509_NAME
*const *a
, const X509_NAME
*const *b
);
65 static int ssl_cipher_list_to_bytes(SSL
*s
, STACK_OF(SSL_CIPHER
) *sk
,
69 * Is a CertificateRequest message allowed at the moment or not?
75 static ossl_inline
int cert_req_allowed(SSL
*s
)
77 /* TLS does not like anon-DH with client cert */
78 if ((s
->version
> SSL3_VERSION
79 && (s
->s3
->tmp
.new_cipher
->algorithm_auth
& SSL_aNULL
))
80 || (s
->s3
->tmp
.new_cipher
->algorithm_auth
& (SSL_aSRP
| SSL_aPSK
)))
87 * Should we expect the ServerKeyExchange message or not?
93 static int key_exchange_expected(SSL
*s
)
95 long alg_k
= s
->s3
->tmp
.new_cipher
->algorithm_mkey
;
98 * Can't skip server key exchange if this is an ephemeral
99 * ciphersuite or for SRP
101 if (alg_k
& (SSL_kDHE
| SSL_kECDHE
| SSL_kDHEPSK
| SSL_kECDHEPSK
110 * ossl_statem_client_read_transition() encapsulates the logic for the allowed
111 * handshake state transitions when the client is reading messages from the
112 * server. The message type that the server has sent is provided in |mt|. The
113 * current state is in |s->statem.hand_state|.
116 * 1: Success (transition allowed)
117 * 0: Error (transition not allowed)
119 int ossl_statem_client_read_transition(SSL
*s
, int mt
)
121 OSSL_STATEM
*st
= &s
->statem
;
124 switch (st
->hand_state
) {
128 case TLS_ST_CW_CLNT_HELLO
:
129 if (mt
== SSL3_MT_SERVER_HELLO
) {
130 st
->hand_state
= TLS_ST_CR_SRVR_HELLO
;
134 if (SSL_IS_DTLS(s
)) {
135 if (mt
== DTLS1_MT_HELLO_VERIFY_REQUEST
) {
136 st
->hand_state
= DTLS_ST_CR_HELLO_VERIFY_REQUEST
;
142 case TLS_ST_CR_SRVR_HELLO
:
144 if (s
->tlsext_ticket_expected
) {
145 if (mt
== SSL3_MT_NEWSESSION_TICKET
) {
146 st
->hand_state
= TLS_ST_CR_SESSION_TICKET
;
149 } else if (mt
== SSL3_MT_CHANGE_CIPHER_SPEC
) {
150 st
->hand_state
= TLS_ST_CR_CHANGE
;
154 if (SSL_IS_DTLS(s
) && mt
== DTLS1_MT_HELLO_VERIFY_REQUEST
) {
155 st
->hand_state
= DTLS_ST_CR_HELLO_VERIFY_REQUEST
;
157 } else if (s
->version
>= TLS1_VERSION
158 && s
->tls_session_secret_cb
!= NULL
159 && s
->session
->tlsext_tick
!= NULL
160 && mt
== SSL3_MT_CHANGE_CIPHER_SPEC
) {
162 * Normally, we can tell if the server is resuming the session
163 * from the session ID. EAP-FAST (RFC 4851), however, relies on
164 * the next server message after the ServerHello to determine if
165 * the server is resuming.
168 st
->hand_state
= TLS_ST_CR_CHANGE
;
170 } else if (!(s
->s3
->tmp
.new_cipher
->algorithm_auth
171 & (SSL_aNULL
| SSL_aSRP
| SSL_aPSK
))) {
172 if (mt
== SSL3_MT_CERTIFICATE
) {
173 st
->hand_state
= TLS_ST_CR_CERT
;
177 ske_expected
= key_exchange_expected(s
);
178 /* SKE is optional for some PSK ciphersuites */
180 || ((s
->s3
->tmp
.new_cipher
->algorithm_mkey
& SSL_PSK
)
181 && mt
== SSL3_MT_SERVER_KEY_EXCHANGE
)) {
182 if (mt
== SSL3_MT_SERVER_KEY_EXCHANGE
) {
183 st
->hand_state
= TLS_ST_CR_KEY_EXCH
;
186 } else if (mt
== SSL3_MT_CERTIFICATE_REQUEST
187 && cert_req_allowed(s
)) {
188 st
->hand_state
= TLS_ST_CR_CERT_REQ
;
190 } else if (mt
== SSL3_MT_SERVER_DONE
) {
191 st
->hand_state
= TLS_ST_CR_SRVR_DONE
;
200 * The CertificateStatus message is optional even if
201 * |tlsext_status_expected| is set
203 if (s
->tlsext_status_expected
&& mt
== SSL3_MT_CERTIFICATE_STATUS
) {
204 st
->hand_state
= TLS_ST_CR_CERT_STATUS
;
209 case TLS_ST_CR_CERT_STATUS
:
210 ske_expected
= key_exchange_expected(s
);
211 /* SKE is optional for some PSK ciphersuites */
212 if (ske_expected
|| ((s
->s3
->tmp
.new_cipher
->algorithm_mkey
& SSL_PSK
)
213 && mt
== SSL3_MT_SERVER_KEY_EXCHANGE
)) {
214 if (mt
== SSL3_MT_SERVER_KEY_EXCHANGE
) {
215 st
->hand_state
= TLS_ST_CR_KEY_EXCH
;
222 case TLS_ST_CR_KEY_EXCH
:
223 if (mt
== SSL3_MT_CERTIFICATE_REQUEST
) {
224 if (cert_req_allowed(s
)) {
225 st
->hand_state
= TLS_ST_CR_CERT_REQ
;
232 case TLS_ST_CR_CERT_REQ
:
233 if (mt
== SSL3_MT_SERVER_DONE
) {
234 st
->hand_state
= TLS_ST_CR_SRVR_DONE
;
239 case TLS_ST_CW_FINISHED
:
240 if (s
->tlsext_ticket_expected
) {
241 if (mt
== SSL3_MT_NEWSESSION_TICKET
) {
242 st
->hand_state
= TLS_ST_CR_SESSION_TICKET
;
245 } else if (mt
== SSL3_MT_CHANGE_CIPHER_SPEC
) {
246 st
->hand_state
= TLS_ST_CR_CHANGE
;
251 case TLS_ST_CR_SESSION_TICKET
:
252 if (mt
== SSL3_MT_CHANGE_CIPHER_SPEC
) {
253 st
->hand_state
= TLS_ST_CR_CHANGE
;
258 case TLS_ST_CR_CHANGE
:
259 if (mt
== SSL3_MT_FINISHED
) {
260 st
->hand_state
= TLS_ST_CR_FINISHED
;
267 /* No valid transition found */
268 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL3_AD_UNEXPECTED_MESSAGE
);
269 SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION
, SSL_R_UNEXPECTED_MESSAGE
);
274 * client_write_transition() works out what handshake state to move to next
275 * when the client is writing messages to be sent to the server.
277 WRITE_TRAN
ossl_statem_client_write_transition(SSL
*s
)
279 OSSL_STATEM
*st
= &s
->statem
;
281 switch (st
->hand_state
) {
283 /* Shouldn't happen */
284 return WRITE_TRAN_ERROR
;
287 /* Renegotiation - fall through */
289 st
->hand_state
= TLS_ST_CW_CLNT_HELLO
;
290 return WRITE_TRAN_CONTINUE
;
292 case TLS_ST_CW_CLNT_HELLO
:
294 * No transition at the end of writing because we don't know what
297 return WRITE_TRAN_FINISHED
;
299 case DTLS_ST_CR_HELLO_VERIFY_REQUEST
:
300 st
->hand_state
= TLS_ST_CW_CLNT_HELLO
;
301 return WRITE_TRAN_CONTINUE
;
303 case TLS_ST_CR_SRVR_DONE
:
304 if (s
->s3
->tmp
.cert_req
)
305 st
->hand_state
= TLS_ST_CW_CERT
;
307 st
->hand_state
= TLS_ST_CW_KEY_EXCH
;
308 return WRITE_TRAN_CONTINUE
;
311 st
->hand_state
= TLS_ST_CW_KEY_EXCH
;
312 return WRITE_TRAN_CONTINUE
;
314 case TLS_ST_CW_KEY_EXCH
:
316 * For TLS, cert_req is set to 2, so a cert chain of nothing is
317 * sent, but no verify packet is sent
320 * XXX: For now, we do not support client authentication in ECDH
321 * cipher suites with ECDH (rather than ECDSA) certificates. We
322 * need to skip the certificate verify message when client's
323 * ECDH public key is sent inside the client certificate.
325 if (s
->s3
->tmp
.cert_req
== 1) {
326 st
->hand_state
= TLS_ST_CW_CERT_VRFY
;
328 st
->hand_state
= TLS_ST_CW_CHANGE
;
330 if (s
->s3
->flags
& TLS1_FLAGS_SKIP_CERT_VERIFY
) {
331 st
->hand_state
= TLS_ST_CW_CHANGE
;
333 return WRITE_TRAN_CONTINUE
;
335 case TLS_ST_CW_CERT_VRFY
:
336 st
->hand_state
= TLS_ST_CW_CHANGE
;
337 return WRITE_TRAN_CONTINUE
;
339 case TLS_ST_CW_CHANGE
:
340 #if defined(OPENSSL_NO_NEXTPROTONEG)
341 st
->hand_state
= TLS_ST_CW_FINISHED
;
343 if (!SSL_IS_DTLS(s
) && s
->s3
->next_proto_neg_seen
)
344 st
->hand_state
= TLS_ST_CW_NEXT_PROTO
;
346 st
->hand_state
= TLS_ST_CW_FINISHED
;
348 return WRITE_TRAN_CONTINUE
;
350 #if !defined(OPENSSL_NO_NEXTPROTONEG)
351 case TLS_ST_CW_NEXT_PROTO
:
352 st
->hand_state
= TLS_ST_CW_FINISHED
;
353 return WRITE_TRAN_CONTINUE
;
356 case TLS_ST_CW_FINISHED
:
358 st
->hand_state
= TLS_ST_OK
;
359 ossl_statem_set_in_init(s
, 0);
360 return WRITE_TRAN_CONTINUE
;
362 return WRITE_TRAN_FINISHED
;
365 case TLS_ST_CR_FINISHED
:
367 st
->hand_state
= TLS_ST_CW_CHANGE
;
368 return WRITE_TRAN_CONTINUE
;
370 st
->hand_state
= TLS_ST_OK
;
371 ossl_statem_set_in_init(s
, 0);
372 return WRITE_TRAN_CONTINUE
;
378 * Perform any pre work that needs to be done prior to sending a message from
379 * the client to the server.
381 WORK_STATE
ossl_statem_client_pre_work(SSL
*s
, WORK_STATE wst
)
383 OSSL_STATEM
*st
= &s
->statem
;
385 switch (st
->hand_state
) {
387 /* No pre work to be done */
390 case TLS_ST_CW_CLNT_HELLO
:
392 if (SSL_IS_DTLS(s
)) {
393 /* every DTLS ClientHello resets Finished MAC */
394 if (!ssl3_init_finished_mac(s
)) {
395 ossl_statem_set_error(s
);
401 case TLS_ST_CW_CHANGE
:
402 if (SSL_IS_DTLS(s
)) {
405 * We're into the last flight so we don't retransmit these
406 * messages unless we need to.
410 #ifndef OPENSSL_NO_SCTP
411 if (BIO_dgram_is_sctp(SSL_get_wbio(s
)))
412 return dtls_wait_for_dry(s
);
418 return tls_finish_handshake(s
, wst
);
421 return WORK_FINISHED_CONTINUE
;
425 * Perform any work that needs to be done after sending a message from the
426 * client to the server.
428 WORK_STATE
ossl_statem_client_post_work(SSL
*s
, WORK_STATE wst
)
430 OSSL_STATEM
*st
= &s
->statem
;
434 switch (st
->hand_state
) {
436 /* No post work to be done */
439 case TLS_ST_CW_CLNT_HELLO
:
440 if (wst
== WORK_MORE_A
&& statem_flush(s
) != 1)
443 if (SSL_IS_DTLS(s
)) {
444 /* Treat the next message as the first packet */
449 case TLS_ST_CW_KEY_EXCH
:
450 if (tls_client_key_exchange_post_work(s
) == 0)
454 case TLS_ST_CW_CHANGE
:
455 s
->session
->cipher
= s
->s3
->tmp
.new_cipher
;
456 #ifdef OPENSSL_NO_COMP
457 s
->session
->compress_meth
= 0;
459 if (s
->s3
->tmp
.new_compression
== NULL
)
460 s
->session
->compress_meth
= 0;
462 s
->session
->compress_meth
= s
->s3
->tmp
.new_compression
->id
;
464 if (!s
->method
->ssl3_enc
->setup_key_block(s
))
467 if (!s
->method
->ssl3_enc
->change_cipher_state(s
,
468 SSL3_CHANGE_CIPHER_CLIENT_WRITE
))
471 if (SSL_IS_DTLS(s
)) {
472 #ifndef OPENSSL_NO_SCTP
475 * Change to new shared key of SCTP-Auth, will be ignored if
478 BIO_ctrl(SSL_get_wbio(s
), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY
,
483 dtls1_reset_seq_numbers(s
, SSL3_CC_WRITE
);
487 case TLS_ST_CW_FINISHED
:
488 #ifndef OPENSSL_NO_SCTP
489 if (wst
== WORK_MORE_A
&& SSL_IS_DTLS(s
) && s
->hit
== 0) {
491 * Change to new shared key of SCTP-Auth, will be ignored if
494 BIO_ctrl(SSL_get_wbio(s
), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY
,
498 if (statem_flush(s
) != 1)
503 return WORK_FINISHED_CONTINUE
;
507 * Get the message construction function and message type for sending from the
510 * Valid return values are:
514 int ossl_statem_client_construct_message(SSL
*s
, WPACKET
*pkt
,
515 confunc_f
*confunc
, int *mt
)
517 OSSL_STATEM
*st
= &s
->statem
;
519 switch (st
->hand_state
) {
521 /* Shouldn't happen */
524 case TLS_ST_CW_CHANGE
:
526 *confunc
= dtls_construct_change_cipher_spec
;
528 *confunc
= tls_construct_change_cipher_spec
;
529 *mt
= SSL3_MT_CHANGE_CIPHER_SPEC
;
532 case TLS_ST_CW_CLNT_HELLO
:
533 *confunc
= tls_construct_client_hello
;
534 *mt
= SSL3_MT_CLIENT_HELLO
;
538 *confunc
= tls_construct_client_certificate
;
539 *mt
= SSL3_MT_CERTIFICATE
;
542 case TLS_ST_CW_KEY_EXCH
:
543 *confunc
= tls_construct_client_key_exchange
;
544 *mt
= SSL3_MT_CLIENT_KEY_EXCHANGE
;
547 case TLS_ST_CW_CERT_VRFY
:
548 *confunc
= tls_construct_client_verify
;
549 *mt
= SSL3_MT_CERTIFICATE_VERIFY
;
552 #if !defined(OPENSSL_NO_NEXTPROTONEG)
553 case TLS_ST_CW_NEXT_PROTO
:
554 *confunc
= tls_construct_next_proto
;
555 *mt
= SSL3_MT_NEXT_PROTO
;
558 case TLS_ST_CW_FINISHED
:
559 *confunc
= tls_construct_finished
;
560 *mt
= SSL3_MT_FINISHED
;
568 * Returns the maximum allowed length for the current message that we are
569 * reading. Excludes the message header.
571 size_t ossl_statem_client_max_message_size(SSL
*s
)
573 OSSL_STATEM
*st
= &s
->statem
;
575 switch (st
->hand_state
) {
577 /* Shouldn't happen */
580 case TLS_ST_CR_SRVR_HELLO
:
581 return SERVER_HELLO_MAX_LENGTH
;
583 case DTLS_ST_CR_HELLO_VERIFY_REQUEST
:
584 return HELLO_VERIFY_REQUEST_MAX_LENGTH
;
587 return s
->max_cert_list
;
589 case TLS_ST_CR_CERT_STATUS
:
590 return SSL3_RT_MAX_PLAIN_LENGTH
;
592 case TLS_ST_CR_KEY_EXCH
:
593 return SERVER_KEY_EXCH_MAX_LENGTH
;
595 case TLS_ST_CR_CERT_REQ
:
597 * Set to s->max_cert_list for compatibility with previous releases. In
598 * practice these messages can get quite long if servers are configured
599 * to provide a long list of acceptable CAs
601 return s
->max_cert_list
;
603 case TLS_ST_CR_SRVR_DONE
:
604 return SERVER_HELLO_DONE_MAX_LENGTH
;
606 case TLS_ST_CR_CHANGE
:
607 if (s
->version
== DTLS1_BAD_VER
)
609 return CCS_MAX_LENGTH
;
611 case TLS_ST_CR_SESSION_TICKET
:
612 return SSL3_RT_MAX_PLAIN_LENGTH
;
614 case TLS_ST_CR_FINISHED
:
615 return FINISHED_MAX_LENGTH
;
620 * Process a message that the client has been received from the server.
622 MSG_PROCESS_RETURN
ossl_statem_client_process_message(SSL
*s
, PACKET
*pkt
)
624 OSSL_STATEM
*st
= &s
->statem
;
626 switch (st
->hand_state
) {
628 /* Shouldn't happen */
629 return MSG_PROCESS_ERROR
;
631 case TLS_ST_CR_SRVR_HELLO
:
632 return tls_process_server_hello(s
, pkt
);
634 case DTLS_ST_CR_HELLO_VERIFY_REQUEST
:
635 return dtls_process_hello_verify(s
, pkt
);
638 return tls_process_server_certificate(s
, pkt
);
640 case TLS_ST_CR_CERT_STATUS
:
641 return tls_process_cert_status(s
, pkt
);
643 case TLS_ST_CR_KEY_EXCH
:
644 return tls_process_key_exchange(s
, pkt
);
646 case TLS_ST_CR_CERT_REQ
:
647 return tls_process_certificate_request(s
, pkt
);
649 case TLS_ST_CR_SRVR_DONE
:
650 return tls_process_server_done(s
, pkt
);
652 case TLS_ST_CR_CHANGE
:
653 return tls_process_change_cipher_spec(s
, pkt
);
655 case TLS_ST_CR_SESSION_TICKET
:
656 return tls_process_new_session_ticket(s
, pkt
);
658 case TLS_ST_CR_FINISHED
:
659 return tls_process_finished(s
, pkt
);
664 * Perform any further processing required following the receipt of a message
667 WORK_STATE
ossl_statem_client_post_process_message(SSL
*s
, WORK_STATE wst
)
669 OSSL_STATEM
*st
= &s
->statem
;
671 switch (st
->hand_state
) {
673 /* Shouldn't happen */
676 case TLS_ST_CR_CERT_REQ
:
677 return tls_prepare_client_certificate(s
, wst
);
679 #ifndef OPENSSL_NO_SCTP
680 case TLS_ST_CR_SRVR_DONE
:
681 /* We only get here if we are using SCTP and we are renegotiating */
682 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s
))) {
683 s
->s3
->in_read_app_data
= 2;
684 s
->rwstate
= SSL_READING
;
685 BIO_clear_retry_flags(SSL_get_rbio(s
));
686 BIO_set_retry_read(SSL_get_rbio(s
));
687 ossl_statem_set_sctp_read_sock(s
, 1);
690 ossl_statem_set_sctp_read_sock(s
, 0);
691 return WORK_FINISHED_STOP
;
696 int tls_construct_client_hello(SSL
*s
, WPACKET
*pkt
)
701 int al
= SSL_AD_HANDSHAKE_FAILURE
;
702 #ifndef OPENSSL_NO_COMP
705 SSL_SESSION
*sess
= s
->session
;
707 if (!WPACKET_set_max_size(pkt
, SSL3_RT_MAX_PLAIN_LENGTH
)) {
708 /* Should not happen */
709 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
713 /* Work out what SSL/TLS/DTLS version to use */
714 protverr
= ssl_set_client_hello_version(s
);
716 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, protverr
);
720 if ((sess
== NULL
) || !ssl_version_supported(s
, sess
->ssl_version
) ||
722 * In the case of EAP-FAST, we can have a pre-shared
723 * "ticket" without a session ID.
725 (!sess
->session_id_length
&& !sess
->tlsext_tick
) ||
726 (sess
->not_resumable
)) {
727 if (!ssl_get_new_session(s
, 0))
730 /* else use the pre-loaded session */
732 p
= s
->s3
->client_random
;
735 * for DTLS if client_random is initialized, reuse it, we are
736 * required to use same upon reply to HelloVerify
738 if (SSL_IS_DTLS(s
)) {
741 for (idx
= 0; idx
< sizeof(s
->s3
->client_random
); idx
++) {
750 if (i
&& ssl_fill_hello_random(s
, 0, p
, sizeof(s
->s3
->client_random
)) <= 0)
754 * version indicates the negotiated version: for example from
755 * an SSLv2/v3 compatible client hello). The client_version
756 * field is the maximum version we permit and it is also
757 * used in RSA encrypted premaster secrets. Some servers can
758 * choke if we initially report a higher version then
759 * renegotiate to a lower one in the premaster secret. This
760 * didn't happen with TLS 1.0 as most servers supported it
761 * but it can with TLS 1.1 or later if the server only supports
764 * Possible scenario with previous logic:
765 * 1. Client hello indicates TLS 1.2
766 * 2. Server hello says TLS 1.0
767 * 3. RSA encrypted premaster secret uses 1.2.
768 * 4. Handshake proceeds using TLS 1.0.
769 * 5. Server sends hello request to renegotiate.
770 * 6. Client hello indicates TLS v1.0 as we now
771 * know that is maximum server supports.
772 * 7. Server chokes on RSA encrypted premaster secret
773 * containing version 1.0.
775 * For interoperability it should be OK to always use the
776 * maximum version we support in client hello and then rely
777 * on the checking of version to ensure the servers isn't
778 * being inconsistent: for example initially negotiating with
779 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
780 * client_version in client hello and not resetting it to
781 * the negotiated version.
783 if (!WPACKET_put_bytes_u16(pkt
, s
->client_version
)
784 || !WPACKET_memcpy(pkt
, s
->s3
->client_random
, SSL3_RANDOM_SIZE
)) {
785 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
793 sess_id_len
= s
->session
->session_id_length
;
794 if (sess_id_len
> sizeof(s
->session
->session_id
)
795 || !WPACKET_start_sub_packet_u8(pkt
)
796 || (sess_id_len
!= 0 && !WPACKET_memcpy(pkt
, s
->session
->session_id
,
798 || !WPACKET_close(pkt
)) {
799 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
803 /* cookie stuff for DTLS */
804 if (SSL_IS_DTLS(s
)) {
805 if (s
->d1
->cookie_len
> sizeof(s
->d1
->cookie
)
806 || !WPACKET_sub_memcpy_u8(pkt
, s
->d1
->cookie
,
807 s
->d1
->cookie_len
)) {
808 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
813 /* Ciphers supported */
814 if (!WPACKET_start_sub_packet_u16(pkt
)) {
815 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
818 /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */
819 if (!ssl_cipher_list_to_bytes(s
, SSL_get_ciphers(s
), pkt
))
821 if (!WPACKET_close(pkt
)) {
822 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
827 if (!WPACKET_start_sub_packet_u8(pkt
)) {
828 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
831 #ifndef OPENSSL_NO_COMP
832 if (ssl_allow_compression(s
) && s
->ctx
->comp_methods
) {
833 int compnum
= sk_SSL_COMP_num(s
->ctx
->comp_methods
);
834 for (i
= 0; i
< compnum
; i
++) {
835 comp
= sk_SSL_COMP_value(s
->ctx
->comp_methods
, i
);
836 if (!WPACKET_put_bytes_u8(pkt
, comp
->id
)) {
837 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
843 /* Add the NULL method */
844 if (!WPACKET_put_bytes_u8(pkt
, 0) || !WPACKET_close(pkt
)) {
845 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
850 if (ssl_prepare_clienthello_tlsext(s
) <= 0) {
851 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, SSL_R_CLIENTHELLO_TLSEXT
);
854 if (!WPACKET_start_sub_packet_u16(pkt
)
856 * If extensions are of zero length then we don't even add the
857 * extensions length bytes
859 || !WPACKET_set_flags(pkt
, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH
)
860 || !ssl_add_clienthello_tlsext(s
, pkt
, &al
)
861 || !WPACKET_close(pkt
)) {
862 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
863 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
870 MSG_PROCESS_RETURN
dtls_process_hello_verify(SSL
*s
, PACKET
*pkt
)
876 if (!PACKET_forward(pkt
, 2)
877 || !PACKET_get_length_prefixed_1(pkt
, &cookiepkt
)) {
878 al
= SSL_AD_DECODE_ERROR
;
879 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY
, SSL_R_LENGTH_MISMATCH
);
883 cookie_len
= PACKET_remaining(&cookiepkt
);
884 if (cookie_len
> sizeof(s
->d1
->cookie
)) {
885 al
= SSL_AD_ILLEGAL_PARAMETER
;
886 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY
, SSL_R_LENGTH_TOO_LONG
);
890 if (!PACKET_copy_bytes(&cookiepkt
, s
->d1
->cookie
, cookie_len
)) {
891 al
= SSL_AD_DECODE_ERROR
;
892 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY
, SSL_R_LENGTH_MISMATCH
);
895 s
->d1
->cookie_len
= cookie_len
;
897 return MSG_PROCESS_FINISHED_READING
;
899 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
900 ossl_statem_set_error(s
);
901 return MSG_PROCESS_ERROR
;
904 MSG_PROCESS_RETURN
tls_process_server_hello(SSL
*s
, PACKET
*pkt
)
906 STACK_OF(SSL_CIPHER
) *sk
;
909 size_t session_id_len
;
910 const unsigned char *cipherchars
;
911 int i
, al
= SSL_AD_INTERNAL_ERROR
;
912 unsigned int compression
;
913 unsigned int sversion
;
915 #ifndef OPENSSL_NO_COMP
919 if (!PACKET_get_net_2(pkt
, &sversion
)) {
920 al
= SSL_AD_DECODE_ERROR
;
921 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_LENGTH_MISMATCH
);
925 protverr
= ssl_choose_client_version(s
, sversion
);
927 al
= SSL_AD_PROTOCOL_VERSION
;
928 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, protverr
);
932 /* load the server hello data */
933 /* load the server random */
934 if (!PACKET_copy_bytes(pkt
, s
->s3
->server_random
, SSL3_RANDOM_SIZE
)) {
935 al
= SSL_AD_DECODE_ERROR
;
936 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_LENGTH_MISMATCH
);
942 /* Get the session-id. */
943 if (!PACKET_get_length_prefixed_1(pkt
, &session_id
)) {
944 al
= SSL_AD_DECODE_ERROR
;
945 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_LENGTH_MISMATCH
);
948 session_id_len
= PACKET_remaining(&session_id
);
949 if (session_id_len
> sizeof s
->session
->session_id
950 || session_id_len
> SSL3_SESSION_ID_SIZE
) {
951 al
= SSL_AD_ILLEGAL_PARAMETER
;
952 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_SSL3_SESSION_ID_TOO_LONG
);
956 if (!PACKET_get_bytes(pkt
, &cipherchars
, TLS_CIPHER_LEN
)) {
957 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_LENGTH_MISMATCH
);
958 al
= SSL_AD_DECODE_ERROR
;
963 * Check if we can resume the session based on external pre-shared secret.
964 * EAP-FAST (RFC 4851) supports two types of session resumption.
965 * Resumption based on server-side state works with session IDs.
966 * Resumption based on pre-shared Protected Access Credentials (PACs)
967 * works by overriding the SessionTicket extension at the application
968 * layer, and does not send a session ID. (We do not know whether EAP-FAST
969 * servers would honour the session ID.) Therefore, the session ID alone
970 * is not a reliable indicator of session resumption, so we first check if
971 * we can resume, and later peek at the next handshake message to see if the
972 * server wants to resume.
974 if (s
->version
>= TLS1_VERSION
&& s
->tls_session_secret_cb
&&
975 s
->session
->tlsext_tick
) {
976 const SSL_CIPHER
*pref_cipher
= NULL
;
978 * s->session->master_key_length is a size_t, but this is an int for
979 * backwards compat reasons
981 int master_key_length
;
982 master_key_length
= sizeof(s
->session
->master_key
);
983 if (s
->tls_session_secret_cb(s
, s
->session
->master_key
,
986 s
->tls_session_secret_cb_arg
)
987 && master_key_length
> 0) {
988 s
->session
->master_key_length
= master_key_length
;
989 s
->session
->cipher
= pref_cipher
?
990 pref_cipher
: ssl_get_cipher_by_char(s
, cipherchars
);
992 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, ERR_R_INTERNAL_ERROR
);
993 al
= SSL_AD_INTERNAL_ERROR
;
998 if (session_id_len
!= 0 && session_id_len
== s
->session
->session_id_length
999 && memcmp(PACKET_data(&session_id
), s
->session
->session_id
,
1000 session_id_len
) == 0) {
1001 if (s
->sid_ctx_length
!= s
->session
->sid_ctx_length
1002 || memcmp(s
->session
->sid_ctx
, s
->sid_ctx
, s
->sid_ctx_length
)) {
1003 /* actually a client application bug */
1004 al
= SSL_AD_ILLEGAL_PARAMETER
;
1005 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
,
1006 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT
);
1012 * If we were trying for session-id reuse but the server
1013 * didn't echo the ID, make a new SSL_SESSION.
1014 * In the case of EAP-FAST and PAC, we do not send a session ID,
1015 * so the PAC-based session secret is always preserved. It'll be
1016 * overwritten if the server refuses resumption.
1018 if (s
->session
->session_id_length
> 0) {
1019 s
->ctx
->stats
.sess_miss
++;
1020 if (!ssl_get_new_session(s
, 0)) {
1025 s
->session
->ssl_version
= s
->version
;
1026 s
->session
->session_id_length
= session_id_len
;
1027 /* session_id_len could be 0 */
1028 memcpy(s
->session
->session_id
, PACKET_data(&session_id
),
1032 /* Session version and negotiated protocol version should match */
1033 if (s
->version
!= s
->session
->ssl_version
) {
1034 al
= SSL_AD_PROTOCOL_VERSION
;
1036 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
,
1037 SSL_R_SSL_SESSION_VERSION_MISMATCH
);
1041 c
= ssl_get_cipher_by_char(s
, cipherchars
);
1043 /* unknown cipher */
1044 al
= SSL_AD_ILLEGAL_PARAMETER
;
1045 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_UNKNOWN_CIPHER_RETURNED
);
1049 * Now that we know the version, update the check to see if it's an allowed
1052 s
->s3
->tmp
.min_ver
= s
->version
;
1053 s
->s3
->tmp
.max_ver
= s
->version
;
1055 * If it is a disabled cipher we either didn't send it in client hello,
1056 * or it's not allowed for the selected protocol. So we return an error.
1058 if (ssl_cipher_disabled(s
, c
, SSL_SECOP_CIPHER_CHECK
)) {
1059 al
= SSL_AD_ILLEGAL_PARAMETER
;
1060 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_WRONG_CIPHER_RETURNED
);
1064 sk
= ssl_get_ciphers_by_id(s
);
1065 i
= sk_SSL_CIPHER_find(sk
, c
);
1067 /* we did not say we would use this cipher */
1068 al
= SSL_AD_ILLEGAL_PARAMETER
;
1069 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_WRONG_CIPHER_RETURNED
);
1074 * Depending on the session caching (internal/external), the cipher
1075 * and/or cipher_id values may not be set. Make sure that cipher_id is
1076 * set and use it for comparison.
1078 if (s
->session
->cipher
)
1079 s
->session
->cipher_id
= s
->session
->cipher
->id
;
1080 if (s
->hit
&& (s
->session
->cipher_id
!= c
->id
)) {
1081 al
= SSL_AD_ILLEGAL_PARAMETER
;
1082 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
,
1083 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED
);
1086 s
->s3
->tmp
.new_cipher
= c
;
1087 /* lets get the compression algorithm */
1089 if (!PACKET_get_1(pkt
, &compression
)) {
1090 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_LENGTH_MISMATCH
);
1091 al
= SSL_AD_DECODE_ERROR
;
1094 #ifdef OPENSSL_NO_COMP
1095 if (compression
!= 0) {
1096 al
= SSL_AD_ILLEGAL_PARAMETER
;
1097 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
,
1098 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM
);
1102 * If compression is disabled we'd better not try to resume a session
1103 * using compression.
1105 if (s
->session
->compress_meth
!= 0) {
1106 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_INCONSISTENT_COMPRESSION
);
1110 if (s
->hit
&& compression
!= s
->session
->compress_meth
) {
1111 al
= SSL_AD_ILLEGAL_PARAMETER
;
1112 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
,
1113 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED
);
1116 if (compression
== 0)
1118 else if (!ssl_allow_compression(s
)) {
1119 al
= SSL_AD_ILLEGAL_PARAMETER
;
1120 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_COMPRESSION_DISABLED
);
1123 comp
= ssl3_comp_find(s
->ctx
->comp_methods
, compression
);
1126 if (compression
!= 0 && comp
== NULL
) {
1127 al
= SSL_AD_ILLEGAL_PARAMETER
;
1128 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
,
1129 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM
);
1132 s
->s3
->tmp
.new_compression
= comp
;
1136 /* TLS extensions */
1137 if (!ssl_parse_serverhello_tlsext(s
, pkt
)) {
1138 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_PARSE_TLSEXT
);
1142 if (PACKET_remaining(pkt
) != 0) {
1143 /* wrong packet length */
1144 al
= SSL_AD_DECODE_ERROR
;
1145 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO
, SSL_R_BAD_PACKET_LENGTH
);
1148 #ifndef OPENSSL_NO_SCTP
1149 if (SSL_IS_DTLS(s
) && s
->hit
) {
1150 unsigned char sctpauthkey
[64];
1151 char labelbuffer
[sizeof(DTLS1_SCTP_AUTH_LABEL
)];
1154 * Add new shared key for SCTP-Auth, will be ignored if
1157 memcpy(labelbuffer
, DTLS1_SCTP_AUTH_LABEL
,
1158 sizeof(DTLS1_SCTP_AUTH_LABEL
));
1160 if (SSL_export_keying_material(s
, sctpauthkey
,
1161 sizeof(sctpauthkey
),
1163 sizeof(labelbuffer
), NULL
, 0, 0) <= 0)
1166 BIO_ctrl(SSL_get_wbio(s
),
1167 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY
,
1168 sizeof(sctpauthkey
), sctpauthkey
);
1172 return MSG_PROCESS_CONTINUE_READING
;
1174 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
1176 ossl_statem_set_error(s
);
1177 return MSG_PROCESS_ERROR
;
1180 MSG_PROCESS_RETURN
tls_process_server_certificate(SSL
*s
, PACKET
*pkt
)
1182 int al
, i
, ret
= MSG_PROCESS_ERROR
, exp_idx
;
1183 unsigned long cert_list_len
, cert_len
;
1185 const unsigned char *certstart
, *certbytes
;
1186 STACK_OF(X509
) *sk
= NULL
;
1187 EVP_PKEY
*pkey
= NULL
;
1189 if ((sk
= sk_X509_new_null()) == NULL
) {
1190 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
, ERR_R_MALLOC_FAILURE
);
1194 if (!PACKET_get_net_3(pkt
, &cert_list_len
)
1195 || PACKET_remaining(pkt
) != cert_list_len
) {
1196 al
= SSL_AD_DECODE_ERROR
;
1197 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
, SSL_R_LENGTH_MISMATCH
);
1200 while (PACKET_remaining(pkt
)) {
1201 if (!PACKET_get_net_3(pkt
, &cert_len
)
1202 || !PACKET_get_bytes(pkt
, &certbytes
, cert_len
)) {
1203 al
= SSL_AD_DECODE_ERROR
;
1204 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
,
1205 SSL_R_CERT_LENGTH_MISMATCH
);
1209 certstart
= certbytes
;
1210 x
= d2i_X509(NULL
, (const unsigned char **)&certbytes
, cert_len
);
1212 al
= SSL_AD_BAD_CERTIFICATE
;
1213 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
, ERR_R_ASN1_LIB
);
1216 if (certbytes
!= (certstart
+ cert_len
)) {
1217 al
= SSL_AD_DECODE_ERROR
;
1218 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
,
1219 SSL_R_CERT_LENGTH_MISMATCH
);
1222 if (!sk_X509_push(sk
, x
)) {
1223 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
, ERR_R_MALLOC_FAILURE
);
1229 i
= ssl_verify_cert_chain(s
, sk
);
1230 if ((s
->verify_mode
& SSL_VERIFY_PEER
) && i
<= 0) {
1231 al
= ssl_verify_alarm_type(s
->verify_result
);
1232 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
,
1233 SSL_R_CERTIFICATE_VERIFY_FAILED
);
1236 ERR_clear_error(); /* but we keep s->verify_result */
1238 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
, i
);
1239 al
= SSL_AD_HANDSHAKE_FAILURE
;
1243 s
->session
->peer_chain
= sk
;
1245 * Inconsistency alert: cert_chain does include the peer's certificate,
1246 * which we don't include in statem_srvr.c
1248 x
= sk_X509_value(sk
, 0);
1251 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1254 pkey
= X509_get0_pubkey(x
);
1256 if (pkey
== NULL
|| EVP_PKEY_missing_parameters(pkey
)) {
1259 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
,
1260 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS
);
1264 i
= ssl_cert_type(x
, pkey
);
1268 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
,
1269 SSL_R_UNKNOWN_CERTIFICATE_TYPE
);
1273 exp_idx
= ssl_cipher_get_cert_index(s
->s3
->tmp
.new_cipher
);
1274 if (exp_idx
>= 0 && i
!= exp_idx
1275 && (exp_idx
!= SSL_PKEY_GOST_EC
||
1276 (i
!= SSL_PKEY_GOST12_512
&& i
!= SSL_PKEY_GOST12_256
1277 && i
!= SSL_PKEY_GOST01
))) {
1279 al
= SSL_AD_ILLEGAL_PARAMETER
;
1280 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE
,
1281 SSL_R_WRONG_CERTIFICATE_TYPE
);
1284 s
->session
->peer_type
= i
;
1286 X509_free(s
->session
->peer
);
1288 s
->session
->peer
= x
;
1289 s
->session
->verify_result
= s
->verify_result
;
1292 ret
= MSG_PROCESS_CONTINUE_READING
;
1296 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
1298 ossl_statem_set_error(s
);
1301 sk_X509_pop_free(sk
, X509_free
);
1305 static int tls_process_ske_psk_preamble(SSL
*s
, PACKET
*pkt
, int *al
)
1307 #ifndef OPENSSL_NO_PSK
1308 PACKET psk_identity_hint
;
1310 /* PSK ciphersuites are preceded by an identity hint */
1312 if (!PACKET_get_length_prefixed_2(pkt
, &psk_identity_hint
)) {
1313 *al
= SSL_AD_DECODE_ERROR
;
1314 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE
, SSL_R_LENGTH_MISMATCH
);
1319 * Store PSK identity hint for later use, hint is used in
1320 * tls_construct_client_key_exchange. Assume that the maximum length of
1321 * a PSK identity hint can be as long as the maximum length of a PSK
1324 if (PACKET_remaining(&psk_identity_hint
) > PSK_MAX_IDENTITY_LEN
) {
1325 *al
= SSL_AD_HANDSHAKE_FAILURE
;
1326 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE
, SSL_R_DATA_LENGTH_TOO_LONG
);
1330 if (PACKET_remaining(&psk_identity_hint
) == 0) {
1331 OPENSSL_free(s
->session
->psk_identity_hint
);
1332 s
->session
->psk_identity_hint
= NULL
;
1333 } else if (!PACKET_strndup(&psk_identity_hint
,
1334 &s
->session
->psk_identity_hint
)) {
1335 *al
= SSL_AD_INTERNAL_ERROR
;
1341 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE
, ERR_R_INTERNAL_ERROR
);
1342 *al
= SSL_AD_INTERNAL_ERROR
;
1347 static int tls_process_ske_srp(SSL
*s
, PACKET
*pkt
, EVP_PKEY
**pkey
, int *al
)
1349 #ifndef OPENSSL_NO_SRP
1350 PACKET prime
, generator
, salt
, server_pub
;
1352 if (!PACKET_get_length_prefixed_2(pkt
, &prime
)
1353 || !PACKET_get_length_prefixed_2(pkt
, &generator
)
1354 || !PACKET_get_length_prefixed_1(pkt
, &salt
)
1355 || !PACKET_get_length_prefixed_2(pkt
, &server_pub
)) {
1356 *al
= SSL_AD_DECODE_ERROR
;
1357 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP
, SSL_R_LENGTH_MISMATCH
);
1361 /* TODO(size_t): Convert BN_bin2bn() calls */
1363 BN_bin2bn(PACKET_data(&prime
),
1364 (int)PACKET_remaining(&prime
), NULL
)) == NULL
1366 BN_bin2bn(PACKET_data(&generator
),
1367 (int)PACKET_remaining(&generator
), NULL
)) == NULL
1369 BN_bin2bn(PACKET_data(&salt
),
1370 (int)PACKET_remaining(&salt
), NULL
)) == NULL
1372 BN_bin2bn(PACKET_data(&server_pub
),
1373 (int)PACKET_remaining(&server_pub
), NULL
)) == NULL
) {
1374 *al
= SSL_AD_INTERNAL_ERROR
;
1375 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP
, ERR_R_BN_LIB
);
1379 if (!srp_verify_server_param(s
, al
)) {
1380 *al
= SSL_AD_DECODE_ERROR
;
1381 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP
, SSL_R_BAD_SRP_PARAMETERS
);
1385 /* We must check if there is a certificate */
1386 if (s
->s3
->tmp
.new_cipher
->algorithm_auth
& (SSL_aRSA
| SSL_aDSS
))
1387 *pkey
= X509_get0_pubkey(s
->session
->peer
);
1391 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP
, ERR_R_INTERNAL_ERROR
);
1392 *al
= SSL_AD_INTERNAL_ERROR
;
1397 static int tls_process_ske_dhe(SSL
*s
, PACKET
*pkt
, EVP_PKEY
**pkey
, int *al
)
1399 #ifndef OPENSSL_NO_DH
1400 PACKET prime
, generator
, pub_key
;
1401 EVP_PKEY
*peer_tmp
= NULL
;
1404 BIGNUM
*p
= NULL
, *g
= NULL
, *bnpub_key
= NULL
;
1406 if (!PACKET_get_length_prefixed_2(pkt
, &prime
)
1407 || !PACKET_get_length_prefixed_2(pkt
, &generator
)
1408 || !PACKET_get_length_prefixed_2(pkt
, &pub_key
)) {
1409 *al
= SSL_AD_DECODE_ERROR
;
1410 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE
, SSL_R_LENGTH_MISMATCH
);
1414 peer_tmp
= EVP_PKEY_new();
1417 if (peer_tmp
== NULL
|| dh
== NULL
) {
1418 *al
= SSL_AD_INTERNAL_ERROR
;
1419 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE
, ERR_R_MALLOC_FAILURE
);
1423 /* TODO(size_t): Convert these calls */
1424 p
= BN_bin2bn(PACKET_data(&prime
), (int)PACKET_remaining(&prime
), NULL
);
1425 g
= BN_bin2bn(PACKET_data(&generator
), (int)PACKET_remaining(&generator
),
1427 bnpub_key
= BN_bin2bn(PACKET_data(&pub_key
),
1428 (int)PACKET_remaining(&pub_key
), NULL
);
1429 if (p
== NULL
|| g
== NULL
|| bnpub_key
== NULL
) {
1430 *al
= SSL_AD_INTERNAL_ERROR
;
1431 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE
, ERR_R_BN_LIB
);
1435 if (BN_is_zero(p
) || BN_is_zero(g
) || BN_is_zero(bnpub_key
)) {
1436 *al
= SSL_AD_DECODE_ERROR
;
1437 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE
, SSL_R_BAD_DH_VALUE
);
1441 if (!DH_set0_pqg(dh
, p
, NULL
, g
)) {
1442 *al
= SSL_AD_INTERNAL_ERROR
;
1443 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE
, ERR_R_BN_LIB
);
1448 if (!DH_set0_key(dh
, bnpub_key
, NULL
)) {
1449 *al
= SSL_AD_INTERNAL_ERROR
;
1450 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE
, ERR_R_BN_LIB
);
1455 if (!ssl_security(s
, SSL_SECOP_TMP_DH
, DH_security_bits(dh
), 0, dh
)) {
1456 *al
= SSL_AD_HANDSHAKE_FAILURE
;
1457 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE
, SSL_R_DH_KEY_TOO_SMALL
);
1461 if (EVP_PKEY_assign_DH(peer_tmp
, dh
) == 0) {
1462 *al
= SSL_AD_INTERNAL_ERROR
;
1463 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE
, ERR_R_EVP_LIB
);
1467 s
->s3
->peer_tmp
= peer_tmp
;
1470 * FIXME: This makes assumptions about which ciphersuites come with
1471 * public keys. We should have a less ad-hoc way of doing this
1473 if (s
->s3
->tmp
.new_cipher
->algorithm_auth
& (SSL_aRSA
| SSL_aDSS
))
1474 *pkey
= X509_get0_pubkey(s
->session
->peer
);
1475 /* else anonymous DH, so no certificate or pkey. */
1484 EVP_PKEY_free(peer_tmp
);
1488 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE
, ERR_R_INTERNAL_ERROR
);
1489 *al
= SSL_AD_INTERNAL_ERROR
;
1494 static int tls_process_ske_ecdhe(SSL
*s
, PACKET
*pkt
, EVP_PKEY
**pkey
, int *al
)
1496 #ifndef OPENSSL_NO_EC
1498 const unsigned char *ecparams
;
1500 unsigned int curve_flags
;
1501 EVP_PKEY_CTX
*pctx
= NULL
;
1504 * Extract elliptic curve parameters and the server's ephemeral ECDH
1505 * public key. For now we only support named (not generic) curves and
1506 * ECParameters in this case is just three bytes.
1508 if (!PACKET_get_bytes(pkt
, &ecparams
, 3)) {
1509 *al
= SSL_AD_DECODE_ERROR
;
1510 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE
, SSL_R_LENGTH_TOO_SHORT
);
1514 * Check curve is one of our preferences, if not server has sent an
1515 * invalid curve. ECParameters is 3 bytes.
1517 if (!tls1_check_curve(s
, ecparams
, 3)) {
1518 *al
= SSL_AD_DECODE_ERROR
;
1519 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE
, SSL_R_WRONG_CURVE
);
1523 curve_nid
= tls1_ec_curve_id2nid(*(ecparams
+ 2), &curve_flags
);
1525 if (curve_nid
== 0) {
1526 *al
= SSL_AD_INTERNAL_ERROR
;
1527 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE
,
1528 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS
);
1532 if ((curve_flags
& TLS_CURVE_TYPE
) == TLS_CURVE_CUSTOM
) {
1533 EVP_PKEY
*key
= EVP_PKEY_new();
1535 if (key
== NULL
|| !EVP_PKEY_set_type(key
, curve_nid
)) {
1536 *al
= SSL_AD_INTERNAL_ERROR
;
1537 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE
, ERR_R_EVP_LIB
);
1541 s
->s3
->peer_tmp
= key
;
1543 /* Set up EVP_PKEY with named curve as parameters */
1544 pctx
= EVP_PKEY_CTX_new_id(EVP_PKEY_EC
, NULL
);
1546 || EVP_PKEY_paramgen_init(pctx
) <= 0
1547 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx
, curve_nid
) <= 0
1548 || EVP_PKEY_paramgen(pctx
, &s
->s3
->peer_tmp
) <= 0) {
1549 *al
= SSL_AD_INTERNAL_ERROR
;
1550 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE
, ERR_R_EVP_LIB
);
1551 EVP_PKEY_CTX_free(pctx
);
1554 EVP_PKEY_CTX_free(pctx
);
1558 if (!PACKET_get_length_prefixed_1(pkt
, &encoded_pt
)) {
1559 *al
= SSL_AD_DECODE_ERROR
;
1560 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE
, SSL_R_LENGTH_MISMATCH
);
1564 if (!EVP_PKEY_set1_tls_encodedpoint(s
->s3
->peer_tmp
,
1565 PACKET_data(&encoded_pt
),
1566 PACKET_remaining(&encoded_pt
))) {
1567 *al
= SSL_AD_DECODE_ERROR
;
1568 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE
, SSL_R_BAD_ECPOINT
);
1573 * The ECC/TLS specification does not mention the use of DSA to sign
1574 * ECParameters in the server key exchange message. We do support RSA
1577 if (s
->s3
->tmp
.new_cipher
->algorithm_auth
& SSL_aECDSA
)
1578 *pkey
= X509_get0_pubkey(s
->session
->peer
);
1579 else if (s
->s3
->tmp
.new_cipher
->algorithm_auth
& SSL_aRSA
)
1580 *pkey
= X509_get0_pubkey(s
->session
->peer
);
1581 /* else anonymous ECDH, so no certificate or pkey. */
1585 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE
, ERR_R_INTERNAL_ERROR
);
1586 *al
= SSL_AD_INTERNAL_ERROR
;
1591 MSG_PROCESS_RETURN
tls_process_key_exchange(SSL
*s
, PACKET
*pkt
)
1595 EVP_PKEY
*pkey
= NULL
;
1596 PACKET save_param_start
, signature
;
1598 alg_k
= s
->s3
->tmp
.new_cipher
->algorithm_mkey
;
1600 save_param_start
= *pkt
;
1602 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1603 EVP_PKEY_free(s
->s3
->peer_tmp
);
1604 s
->s3
->peer_tmp
= NULL
;
1607 if (alg_k
& SSL_PSK
) {
1608 if (!tls_process_ske_psk_preamble(s
, pkt
, &al
))
1612 /* Nothing else to do for plain PSK or RSAPSK */
1613 if (alg_k
& (SSL_kPSK
| SSL_kRSAPSK
)) {
1614 } else if (alg_k
& SSL_kSRP
) {
1615 if (!tls_process_ske_srp(s
, pkt
, &pkey
, &al
))
1617 } else if (alg_k
& (SSL_kDHE
| SSL_kDHEPSK
)) {
1618 if (!tls_process_ske_dhe(s
, pkt
, &pkey
, &al
))
1620 } else if (alg_k
& (SSL_kECDHE
| SSL_kECDHEPSK
)) {
1621 if (!tls_process_ske_ecdhe(s
, pkt
, &pkey
, &al
))
1624 al
= SSL_AD_UNEXPECTED_MESSAGE
;
1625 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, SSL_R_UNEXPECTED_MESSAGE
);
1629 /* if it was signed, check the signature */
1633 const EVP_MD
*md
= NULL
;
1637 * |pkt| now points to the beginning of the signature, so the difference
1638 * equals the length of the parameters.
1640 if (!PACKET_get_sub_packet(&save_param_start
, ¶ms
,
1641 PACKET_remaining(&save_param_start
) -
1642 PACKET_remaining(pkt
))) {
1643 al
= SSL_AD_INTERNAL_ERROR
;
1644 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, ERR_R_INTERNAL_ERROR
);
1648 if (SSL_USE_SIGALGS(s
)) {
1649 const unsigned char *sigalgs
;
1651 if (!PACKET_get_bytes(pkt
, &sigalgs
, 2)) {
1652 al
= SSL_AD_DECODE_ERROR
;
1653 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, SSL_R_LENGTH_TOO_SHORT
);
1656 rv
= tls12_check_peer_sigalg(&md
, s
, sigalgs
, pkey
);
1658 al
= SSL_AD_INTERNAL_ERROR
;
1660 } else if (rv
== 0) {
1661 al
= SSL_AD_DECODE_ERROR
;
1665 fprintf(stderr
, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md
));
1667 } else if (EVP_PKEY_id(pkey
) == EVP_PKEY_RSA
) {
1668 md
= EVP_md5_sha1();
1673 if (!PACKET_get_length_prefixed_2(pkt
, &signature
)
1674 || PACKET_remaining(pkt
) != 0) {
1675 al
= SSL_AD_DECODE_ERROR
;
1676 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, SSL_R_LENGTH_MISMATCH
);
1679 maxsig
= EVP_PKEY_size(pkey
);
1681 al
= SSL_AD_INTERNAL_ERROR
;
1682 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, ERR_R_INTERNAL_ERROR
);
1687 * Check signature length
1689 if (PACKET_remaining(&signature
) > (size_t)maxsig
) {
1690 /* wrong packet length */
1691 al
= SSL_AD_DECODE_ERROR
;
1692 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
,
1693 SSL_R_WRONG_SIGNATURE_LENGTH
);
1697 md_ctx
= EVP_MD_CTX_new();
1698 if (md_ctx
== NULL
) {
1699 al
= SSL_AD_INTERNAL_ERROR
;
1700 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, ERR_R_MALLOC_FAILURE
);
1704 if (EVP_VerifyInit_ex(md_ctx
, md
, NULL
) <= 0
1705 || EVP_VerifyUpdate(md_ctx
, &(s
->s3
->client_random
[0]),
1706 SSL3_RANDOM_SIZE
) <= 0
1707 || EVP_VerifyUpdate(md_ctx
, &(s
->s3
->server_random
[0]),
1708 SSL3_RANDOM_SIZE
) <= 0
1709 || EVP_VerifyUpdate(md_ctx
, PACKET_data(¶ms
),
1710 PACKET_remaining(¶ms
)) <= 0) {
1711 EVP_MD_CTX_free(md_ctx
);
1712 al
= SSL_AD_INTERNAL_ERROR
;
1713 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, ERR_R_EVP_LIB
);
1716 /* TODO(size_t): Convert this call */
1717 if (EVP_VerifyFinal(md_ctx
, PACKET_data(&signature
),
1718 (unsigned int)PACKET_remaining(&signature
),
1721 EVP_MD_CTX_free(md_ctx
);
1722 al
= SSL_AD_DECRYPT_ERROR
;
1723 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, SSL_R_BAD_SIGNATURE
);
1726 EVP_MD_CTX_free(md_ctx
);
1728 /* aNULL, aSRP or PSK do not need public keys */
1729 if (!(s
->s3
->tmp
.new_cipher
->algorithm_auth
& (SSL_aNULL
| SSL_aSRP
))
1730 && !(alg_k
& SSL_PSK
)) {
1731 /* Might be wrong key type, check it */
1732 if (ssl3_check_cert_and_algorithm(s
)) {
1733 /* Otherwise this shouldn't happen */
1734 al
= SSL_AD_INTERNAL_ERROR
;
1735 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, ERR_R_INTERNAL_ERROR
);
1737 al
= SSL_AD_DECODE_ERROR
;
1741 /* still data left over */
1742 if (PACKET_remaining(pkt
) != 0) {
1743 al
= SSL_AD_DECODE_ERROR
;
1744 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE
, SSL_R_EXTRA_DATA_IN_MESSAGE
);
1749 return MSG_PROCESS_CONTINUE_READING
;
1752 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
1753 ossl_statem_set_error(s
);
1754 return MSG_PROCESS_ERROR
;
1757 MSG_PROCESS_RETURN
tls_process_certificate_request(SSL
*s
, PACKET
*pkt
)
1759 int ret
= MSG_PROCESS_ERROR
;
1760 unsigned int list_len
, ctype_num
, i
, name_len
;
1761 X509_NAME
*xn
= NULL
;
1762 const unsigned char *data
;
1763 const unsigned char *namestart
, *namebytes
;
1764 STACK_OF(X509_NAME
) *ca_sk
= NULL
;
1766 if ((ca_sk
= sk_X509_NAME_new(ca_dn_cmp
)) == NULL
) {
1767 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
, ERR_R_MALLOC_FAILURE
);
1771 /* get the certificate types */
1772 if (!PACKET_get_1(pkt
, &ctype_num
)
1773 || !PACKET_get_bytes(pkt
, &data
, ctype_num
)) {
1774 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_DECODE_ERROR
);
1775 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
, SSL_R_LENGTH_MISMATCH
);
1778 OPENSSL_free(s
->cert
->ctypes
);
1779 s
->cert
->ctypes
= NULL
;
1780 if (ctype_num
> SSL3_CT_NUMBER
) {
1781 /* If we exceed static buffer copy all to cert structure */
1782 s
->cert
->ctypes
= OPENSSL_malloc(ctype_num
);
1783 if (s
->cert
->ctypes
== NULL
) {
1784 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
, ERR_R_MALLOC_FAILURE
);
1787 memcpy(s
->cert
->ctypes
, data
, ctype_num
);
1788 s
->cert
->ctype_num
= ctype_num
;
1789 ctype_num
= SSL3_CT_NUMBER
;
1791 for (i
= 0; i
< ctype_num
; i
++)
1792 s
->s3
->tmp
.ctype
[i
] = data
[i
];
1794 if (SSL_USE_SIGALGS(s
)) {
1795 if (!PACKET_get_net_2(pkt
, &list_len
)
1796 || !PACKET_get_bytes(pkt
, &data
, list_len
)) {
1797 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_DECODE_ERROR
);
1798 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
,
1799 SSL_R_LENGTH_MISMATCH
);
1803 /* Clear certificate digests and validity flags */
1804 for (i
= 0; i
< SSL_PKEY_NUM
; i
++) {
1805 s
->s3
->tmp
.md
[i
] = NULL
;
1806 s
->s3
->tmp
.valid_flags
[i
] = 0;
1808 if ((list_len
& 1) || !tls1_save_sigalgs(s
, data
, list_len
)) {
1809 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_DECODE_ERROR
);
1810 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
,
1811 SSL_R_SIGNATURE_ALGORITHMS_ERROR
);
1814 if (!tls1_process_sigalgs(s
)) {
1815 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
1816 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
, ERR_R_MALLOC_FAILURE
);
1820 ssl_set_default_md(s
);
1823 /* get the CA RDNs */
1824 if (!PACKET_get_net_2(pkt
, &list_len
)
1825 || PACKET_remaining(pkt
) != list_len
) {
1826 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_DECODE_ERROR
);
1827 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
, SSL_R_LENGTH_MISMATCH
);
1831 while (PACKET_remaining(pkt
)) {
1832 if (!PACKET_get_net_2(pkt
, &name_len
)
1833 || !PACKET_get_bytes(pkt
, &namebytes
, name_len
)) {
1834 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_DECODE_ERROR
);
1835 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
,
1836 SSL_R_LENGTH_MISMATCH
);
1840 namestart
= namebytes
;
1842 if ((xn
= d2i_X509_NAME(NULL
, (const unsigned char **)&namebytes
,
1843 name_len
)) == NULL
) {
1844 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_DECODE_ERROR
);
1845 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
, ERR_R_ASN1_LIB
);
1849 if (namebytes
!= (namestart
+ name_len
)) {
1850 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_DECODE_ERROR
);
1851 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
,
1852 SSL_R_CA_DN_LENGTH_MISMATCH
);
1855 if (!sk_X509_NAME_push(ca_sk
, xn
)) {
1856 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST
, ERR_R_MALLOC_FAILURE
);
1862 /* we should setup a certificate to return.... */
1863 s
->s3
->tmp
.cert_req
= 1;
1864 s
->s3
->tmp
.ctype_num
= ctype_num
;
1865 sk_X509_NAME_pop_free(s
->s3
->tmp
.ca_names
, X509_NAME_free
);
1866 s
->s3
->tmp
.ca_names
= ca_sk
;
1869 ret
= MSG_PROCESS_CONTINUE_PROCESSING
;
1872 ossl_statem_set_error(s
);
1875 sk_X509_NAME_pop_free(ca_sk
, X509_NAME_free
);
1879 static int ca_dn_cmp(const X509_NAME
*const *a
, const X509_NAME
*const *b
)
1881 return (X509_NAME_cmp(*a
, *b
));
1884 MSG_PROCESS_RETURN
tls_process_new_session_ticket(SSL
*s
, PACKET
*pkt
)
1887 unsigned int ticklen
;
1888 unsigned long ticket_lifetime_hint
;
1889 unsigned int sess_len
;
1891 if (!PACKET_get_net_4(pkt
, &ticket_lifetime_hint
)
1892 || !PACKET_get_net_2(pkt
, &ticklen
)
1893 || PACKET_remaining(pkt
) != ticklen
) {
1894 al
= SSL_AD_DECODE_ERROR
;
1895 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET
, SSL_R_LENGTH_MISMATCH
);
1899 /* Server is allowed to change its mind and send an empty ticket. */
1901 return MSG_PROCESS_CONTINUE_READING
;
1903 if (s
->session
->session_id_length
> 0) {
1904 int i
= s
->session_ctx
->session_cache_mode
;
1905 SSL_SESSION
*new_sess
;
1907 * We reused an existing session, so we need to replace it with a new
1910 if (i
& SSL_SESS_CACHE_CLIENT
) {
1912 * Remove the old session from the cache. We carry on if this fails
1914 SSL_CTX_remove_session(s
->session_ctx
, s
->session
);
1917 if ((new_sess
= ssl_session_dup(s
->session
, 0)) == 0) {
1918 al
= SSL_AD_INTERNAL_ERROR
;
1919 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET
, ERR_R_MALLOC_FAILURE
);
1923 SSL_SESSION_free(s
->session
);
1924 s
->session
= new_sess
;
1927 OPENSSL_free(s
->session
->tlsext_tick
);
1928 s
->session
->tlsext_ticklen
= 0;
1930 s
->session
->tlsext_tick
= OPENSSL_malloc(ticklen
);
1931 if (s
->session
->tlsext_tick
== NULL
) {
1932 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET
, ERR_R_MALLOC_FAILURE
);
1935 if (!PACKET_copy_bytes(pkt
, s
->session
->tlsext_tick
, ticklen
)) {
1936 al
= SSL_AD_DECODE_ERROR
;
1937 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET
, SSL_R_LENGTH_MISMATCH
);
1941 s
->session
->tlsext_tick_lifetime_hint
= ticket_lifetime_hint
;
1942 s
->session
->tlsext_ticklen
= ticklen
;
1944 * There are two ways to detect a resumed ticket session. One is to set
1945 * an appropriate session ID and then the server must return a match in
1946 * ServerHello. This allows the normal client session ID matching to work
1947 * and we know much earlier that the ticket has been accepted. The
1948 * other way is to set zero length session ID when the ticket is
1949 * presented and rely on the handshake to determine session resumption.
1950 * We choose the former approach because this fits in with assumptions
1951 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1952 * SHA256 is disabled) hash of the ticket.
1955 * TODO(size_t): we use sess_len here because EVP_Digest expects an int
1956 * but s->session->session_id_length is a size_t
1958 if (!EVP_Digest(s
->session
->tlsext_tick
, ticklen
,
1959 s
->session
->session_id
, &sess_len
,
1960 EVP_sha256(), NULL
)) {
1961 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET
, ERR_R_EVP_LIB
);
1964 s
->session
->session_id_length
= sess_len
;
1965 return MSG_PROCESS_CONTINUE_READING
;
1967 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
1969 ossl_statem_set_error(s
);
1970 return MSG_PROCESS_ERROR
;
1973 MSG_PROCESS_RETURN
tls_process_cert_status(SSL
*s
, PACKET
*pkt
)
1979 if (!PACKET_get_1(pkt
, &type
)
1980 || type
!= TLSEXT_STATUSTYPE_ocsp
) {
1981 al
= SSL_AD_DECODE_ERROR
;
1982 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS
, SSL_R_UNSUPPORTED_STATUS_TYPE
);
1985 if (!PACKET_get_net_3_len(pkt
, &resplen
)
1986 || PACKET_remaining(pkt
) != resplen
) {
1987 al
= SSL_AD_DECODE_ERROR
;
1988 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS
, SSL_R_LENGTH_MISMATCH
);
1991 s
->tlsext_ocsp_resp
= OPENSSL_malloc(resplen
);
1992 if (s
->tlsext_ocsp_resp
== NULL
) {
1993 al
= SSL_AD_INTERNAL_ERROR
;
1994 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS
, ERR_R_MALLOC_FAILURE
);
1997 if (!PACKET_copy_bytes(pkt
, s
->tlsext_ocsp_resp
, resplen
)) {
1998 al
= SSL_AD_DECODE_ERROR
;
1999 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS
, SSL_R_LENGTH_MISMATCH
);
2002 s
->tlsext_ocsp_resplen
= resplen
;
2003 return MSG_PROCESS_CONTINUE_READING
;
2005 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
2006 ossl_statem_set_error(s
);
2007 return MSG_PROCESS_ERROR
;
2010 MSG_PROCESS_RETURN
tls_process_server_done(SSL
*s
, PACKET
*pkt
)
2012 if (PACKET_remaining(pkt
) > 0) {
2013 /* should contain no data */
2014 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_DECODE_ERROR
);
2015 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE
, SSL_R_LENGTH_MISMATCH
);
2016 ossl_statem_set_error(s
);
2017 return MSG_PROCESS_ERROR
;
2019 #ifndef OPENSSL_NO_SRP
2020 if (s
->s3
->tmp
.new_cipher
->algorithm_mkey
& SSL_kSRP
) {
2021 if (SRP_Calc_A_param(s
) <= 0) {
2022 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE
, SSL_R_SRP_A_CALC
);
2023 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
2024 ossl_statem_set_error(s
);
2025 return MSG_PROCESS_ERROR
;
2031 * at this point we check that we have the required stuff from
2034 if (!ssl3_check_cert_and_algorithm(s
)) {
2035 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_HANDSHAKE_FAILURE
);
2036 ossl_statem_set_error(s
);
2037 return MSG_PROCESS_ERROR
;
2041 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2042 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2043 * message, or NULL and -1 otherwise
2045 if (s
->tlsext_status_type
!= -1 && s
->ctx
->tlsext_status_cb
!= NULL
) {
2047 ret
= s
->ctx
->tlsext_status_cb(s
, s
->ctx
->tlsext_status_arg
);
2049 ssl3_send_alert(s
, SSL3_AL_FATAL
,
2050 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE
);
2051 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE
,
2052 SSL_R_INVALID_STATUS_RESPONSE
);
2053 return MSG_PROCESS_ERROR
;
2056 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
2057 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE
, ERR_R_MALLOC_FAILURE
);
2058 return MSG_PROCESS_ERROR
;
2061 #ifndef OPENSSL_NO_CT
2062 if (s
->ct_validation_callback
!= NULL
) {
2063 /* Note we validate the SCTs whether or not we abort on error */
2064 if (!ssl_validate_ct(s
) && (s
->verify_mode
& SSL_VERIFY_PEER
)) {
2065 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_HANDSHAKE_FAILURE
);
2066 return MSG_PROCESS_ERROR
;
2071 #ifndef OPENSSL_NO_SCTP
2072 /* Only applies to renegotiation */
2073 if (SSL_IS_DTLS(s
) && BIO_dgram_is_sctp(SSL_get_wbio(s
))
2074 && s
->renegotiate
!= 0)
2075 return MSG_PROCESS_CONTINUE_PROCESSING
;
2078 return MSG_PROCESS_FINISHED_READING
;
2081 static int tls_construct_cke_psk_preamble(SSL
*s
, WPACKET
*pkt
, int *al
)
2083 #ifndef OPENSSL_NO_PSK
2086 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2087 * \0-terminated identity. The last byte is for us for simulating
2090 char identity
[PSK_MAX_IDENTITY_LEN
+ 1];
2091 size_t identitylen
= 0;
2092 unsigned char psk
[PSK_MAX_PSK_LEN
];
2093 unsigned char *tmppsk
= NULL
;
2094 char *tmpidentity
= NULL
;
2097 if (s
->psk_client_callback
== NULL
) {
2098 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE
, SSL_R_PSK_NO_CLIENT_CB
);
2099 *al
= SSL_AD_INTERNAL_ERROR
;
2103 memset(identity
, 0, sizeof(identity
));
2105 psklen
= s
->psk_client_callback(s
, s
->session
->psk_identity_hint
,
2106 identity
, sizeof(identity
) - 1,
2109 if (psklen
> PSK_MAX_PSK_LEN
) {
2110 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE
, ERR_R_INTERNAL_ERROR
);
2111 *al
= SSL_AD_HANDSHAKE_FAILURE
;
2113 } else if (psklen
== 0) {
2114 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE
,
2115 SSL_R_PSK_IDENTITY_NOT_FOUND
);
2116 *al
= SSL_AD_HANDSHAKE_FAILURE
;
2120 identitylen
= strlen(identity
);
2121 if (identitylen
> PSK_MAX_IDENTITY_LEN
) {
2122 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE
, ERR_R_INTERNAL_ERROR
);
2123 *al
= SSL_AD_HANDSHAKE_FAILURE
;
2127 tmppsk
= OPENSSL_memdup(psk
, psklen
);
2128 tmpidentity
= OPENSSL_strdup(identity
);
2129 if (tmppsk
== NULL
|| tmpidentity
== NULL
) {
2130 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE
, ERR_R_MALLOC_FAILURE
);
2131 *al
= SSL_AD_INTERNAL_ERROR
;
2135 OPENSSL_free(s
->s3
->tmp
.psk
);
2136 s
->s3
->tmp
.psk
= tmppsk
;
2137 s
->s3
->tmp
.psklen
= psklen
;
2139 OPENSSL_free(s
->session
->psk_identity
);
2140 s
->session
->psk_identity
= tmpidentity
;
2143 if (!WPACKET_sub_memcpy_u16(pkt
, identity
, identitylen
)) {
2144 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE
, ERR_R_INTERNAL_ERROR
);
2145 *al
= SSL_AD_INTERNAL_ERROR
;
2152 OPENSSL_cleanse(psk
, psklen
);
2153 OPENSSL_cleanse(identity
, sizeof(identity
));
2154 OPENSSL_clear_free(tmppsk
, psklen
);
2155 OPENSSL_clear_free(tmpidentity
, identitylen
);
2159 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE
, ERR_R_INTERNAL_ERROR
);
2160 *al
= SSL_AD_INTERNAL_ERROR
;
2165 static int tls_construct_cke_rsa(SSL
*s
, WPACKET
*pkt
, int *al
)
2167 #ifndef OPENSSL_NO_RSA
2168 unsigned char *encdata
= NULL
;
2169 EVP_PKEY
*pkey
= NULL
;
2170 EVP_PKEY_CTX
*pctx
= NULL
;
2172 unsigned char *pms
= NULL
;
2175 if (s
->session
->peer
== NULL
) {
2177 * We should always have a server certificate with SSL_kRSA.
2179 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA
, ERR_R_INTERNAL_ERROR
);
2183 pkey
= X509_get0_pubkey(s
->session
->peer
);
2184 if (EVP_PKEY_get0_RSA(pkey
) == NULL
) {
2185 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA
, ERR_R_INTERNAL_ERROR
);
2189 pmslen
= SSL_MAX_MASTER_KEY_LENGTH
;
2190 pms
= OPENSSL_malloc(pmslen
);
2192 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA
, ERR_R_MALLOC_FAILURE
);
2193 *al
= SSL_AD_INTERNAL_ERROR
;
2197 pms
[0] = s
->client_version
>> 8;
2198 pms
[1] = s
->client_version
& 0xff;
2199 /* TODO(size_t): Convert this function */
2200 if (RAND_bytes(pms
+ 2, (int)(pmslen
- 2)) <= 0) {
2204 /* Fix buf for TLS and beyond */
2205 if (s
->version
> SSL3_VERSION
&& !WPACKET_start_sub_packet_u16(pkt
)) {
2206 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA
, ERR_R_INTERNAL_ERROR
);
2209 pctx
= EVP_PKEY_CTX_new(pkey
, NULL
);
2210 if (pctx
== NULL
|| EVP_PKEY_encrypt_init(pctx
) <= 0
2211 || EVP_PKEY_encrypt(pctx
, NULL
, &enclen
, pms
, pmslen
) <= 0) {
2212 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA
, ERR_R_EVP_LIB
);
2215 if (!WPACKET_allocate_bytes(pkt
, enclen
, &encdata
)
2216 || EVP_PKEY_encrypt(pctx
, encdata
, &enclen
, pms
, pmslen
) <= 0) {
2217 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA
, SSL_R_BAD_RSA_ENCRYPT
);
2220 EVP_PKEY_CTX_free(pctx
);
2223 if (s
->options
& SSL_OP_PKCS1_CHECK_1
)
2225 if (s
->options
& SSL_OP_PKCS1_CHECK_2
)
2229 /* Fix buf for TLS and beyond */
2230 if (s
->version
> SSL3_VERSION
&& !WPACKET_close(pkt
)) {
2231 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA
, ERR_R_INTERNAL_ERROR
);
2235 s
->s3
->tmp
.pms
= pms
;
2236 s
->s3
->tmp
.pmslen
= pmslen
;
2240 OPENSSL_clear_free(pms
, pmslen
);
2241 EVP_PKEY_CTX_free(pctx
);
2245 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA
, ERR_R_INTERNAL_ERROR
);
2246 *al
= SSL_AD_INTERNAL_ERROR
;
2251 static int tls_construct_cke_dhe(SSL
*s
, WPACKET
*pkt
, int *al
)
2253 #ifndef OPENSSL_NO_DH
2255 const BIGNUM
*pub_key
;
2256 EVP_PKEY
*ckey
= NULL
, *skey
= NULL
;
2257 unsigned char *keybytes
= NULL
;
2259 skey
= s
->s3
->peer_tmp
;
2263 ckey
= ssl_generate_pkey(skey
);
2264 dh_clnt
= EVP_PKEY_get0_DH(ckey
);
2266 if (dh_clnt
== NULL
|| ssl_derive(s
, ckey
, skey
) == 0)
2269 /* send off the data */
2270 DH_get0_key(dh_clnt
, &pub_key
, NULL
);
2271 if (!WPACKET_sub_allocate_bytes_u16(pkt
, BN_num_bytes(pub_key
), &keybytes
))
2274 BN_bn2bin(pub_key
, keybytes
);
2275 EVP_PKEY_free(ckey
);
2279 EVP_PKEY_free(ckey
);
2281 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE
, ERR_R_INTERNAL_ERROR
);
2282 *al
= SSL_AD_INTERNAL_ERROR
;
2286 static int tls_construct_cke_ecdhe(SSL
*s
, WPACKET
*pkt
, int *al
)
2288 #ifndef OPENSSL_NO_EC
2289 unsigned char *encodedPoint
= NULL
;
2290 size_t encoded_pt_len
= 0;
2291 EVP_PKEY
*ckey
= NULL
, *skey
= NULL
;
2294 skey
= s
->s3
->peer_tmp
;
2296 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE
, ERR_R_INTERNAL_ERROR
);
2300 ckey
= ssl_generate_pkey(skey
);
2302 if (ssl_derive(s
, ckey
, skey
) == 0) {
2303 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE
, ERR_R_EVP_LIB
);
2307 /* Generate encoding of client key */
2308 encoded_pt_len
= EVP_PKEY_get1_tls_encodedpoint(ckey
, &encodedPoint
);
2310 if (encoded_pt_len
== 0) {
2311 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE
, ERR_R_EC_LIB
);
2315 if (!WPACKET_sub_memcpy_u8(pkt
, encodedPoint
, encoded_pt_len
)) {
2316 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE
, ERR_R_INTERNAL_ERROR
);
2322 OPENSSL_free(encodedPoint
);
2323 EVP_PKEY_free(ckey
);
2326 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE
, ERR_R_INTERNAL_ERROR
);
2327 *al
= SSL_AD_INTERNAL_ERROR
;
2332 static int tls_construct_cke_gost(SSL
*s
, WPACKET
*pkt
, int *al
)
2334 #ifndef OPENSSL_NO_GOST
2335 /* GOST key exchange message creation */
2336 EVP_PKEY_CTX
*pkey_ctx
= NULL
;
2339 unsigned int md_len
;
2340 unsigned char shared_ukm
[32], tmp
[256];
2341 EVP_MD_CTX
*ukm_hash
= NULL
;
2342 int dgst_nid
= NID_id_GostR3411_94
;
2343 unsigned char *pms
= NULL
;
2346 if ((s
->s3
->tmp
.new_cipher
->algorithm_auth
& SSL_aGOST12
) != 0)
2347 dgst_nid
= NID_id_GostR3411_2012_256
;
2350 * Get server sertificate PKEY and create ctx from it
2352 peer_cert
= s
->session
->peer
;
2354 *al
= SSL_AD_HANDSHAKE_FAILURE
;
2355 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST
,
2356 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER
);
2360 pkey_ctx
= EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert
), NULL
);
2361 if (pkey_ctx
== NULL
) {
2362 *al
= SSL_AD_INTERNAL_ERROR
;
2363 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST
, ERR_R_MALLOC_FAILURE
);
2367 * If we have send a certificate, and certificate key
2368 * parameters match those of server certificate, use
2369 * certificate key for key exchange
2372 /* Otherwise, generate ephemeral key pair */
2374 pms
= OPENSSL_malloc(pmslen
);
2376 *al
= SSL_AD_INTERNAL_ERROR
;
2377 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST
, ERR_R_MALLOC_FAILURE
);
2381 if (EVP_PKEY_encrypt_init(pkey_ctx
) <= 0
2382 /* Generate session key
2383 * TODO(size_t): Convert this function
2385 || RAND_bytes(pms
, (int)pmslen
) <= 0) {
2386 *al
= SSL_AD_INTERNAL_ERROR
;
2387 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST
, ERR_R_INTERNAL_ERROR
);
2391 * Compute shared IV and store it in algorithm-specific context
2394 ukm_hash
= EVP_MD_CTX_new();
2395 if (ukm_hash
== NULL
2396 || EVP_DigestInit(ukm_hash
, EVP_get_digestbynid(dgst_nid
)) <= 0
2397 || EVP_DigestUpdate(ukm_hash
, s
->s3
->client_random
,
2398 SSL3_RANDOM_SIZE
) <= 0
2399 || EVP_DigestUpdate(ukm_hash
, s
->s3
->server_random
,
2400 SSL3_RANDOM_SIZE
) <= 0
2401 || EVP_DigestFinal_ex(ukm_hash
, shared_ukm
, &md_len
) <= 0) {
2402 *al
= SSL_AD_INTERNAL_ERROR
;
2403 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST
, ERR_R_INTERNAL_ERROR
);
2406 EVP_MD_CTX_free(ukm_hash
);
2408 if (EVP_PKEY_CTX_ctrl(pkey_ctx
, -1, EVP_PKEY_OP_ENCRYPT
,
2409 EVP_PKEY_CTRL_SET_IV
, 8, shared_ukm
) < 0) {
2410 *al
= SSL_AD_INTERNAL_ERROR
;
2411 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST
, SSL_R_LIBRARY_BUG
);
2414 /* Make GOST keytransport blob message */
2416 * Encapsulate it into sequence
2419 if (EVP_PKEY_encrypt(pkey_ctx
, tmp
, &msglen
, pms
, pmslen
) <= 0) {
2420 *al
= SSL_AD_INTERNAL_ERROR
;
2421 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST
, SSL_R_LIBRARY_BUG
);
2425 if (!WPACKET_put_bytes_u8(pkt
, V_ASN1_SEQUENCE
| V_ASN1_CONSTRUCTED
)
2426 || (msglen
>= 0x80 && !WPACKET_put_bytes_u8(pkt
, 0x81))
2427 || !WPACKET_sub_memcpy_u8(pkt
, tmp
, msglen
)) {
2428 *al
= SSL_AD_INTERNAL_ERROR
;
2429 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST
, ERR_R_INTERNAL_ERROR
);
2433 EVP_PKEY_CTX_free(pkey_ctx
);
2434 s
->s3
->tmp
.pms
= pms
;
2435 s
->s3
->tmp
.pmslen
= pmslen
;
2439 EVP_PKEY_CTX_free(pkey_ctx
);
2440 OPENSSL_clear_free(pms
, pmslen
);
2441 EVP_MD_CTX_free(ukm_hash
);
2444 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST
, ERR_R_INTERNAL_ERROR
);
2445 *al
= SSL_AD_INTERNAL_ERROR
;
2450 static int tls_construct_cke_srp(SSL
*s
, WPACKET
*pkt
, int *al
)
2452 #ifndef OPENSSL_NO_SRP
2453 unsigned char *abytes
= NULL
;
2455 if (s
->srp_ctx
.A
== NULL
2456 || !WPACKET_sub_allocate_bytes_u16(pkt
, BN_num_bytes(s
->srp_ctx
.A
),
2458 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP
, ERR_R_INTERNAL_ERROR
);
2461 BN_bn2bin(s
->srp_ctx
.A
, abytes
);
2463 OPENSSL_free(s
->session
->srp_username
);
2464 s
->session
->srp_username
= OPENSSL_strdup(s
->srp_ctx
.login
);
2465 if (s
->session
->srp_username
== NULL
) {
2466 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP
, ERR_R_MALLOC_FAILURE
);
2472 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP
, ERR_R_INTERNAL_ERROR
);
2473 *al
= SSL_AD_INTERNAL_ERROR
;
2478 int tls_construct_client_key_exchange(SSL
*s
, WPACKET
*pkt
)
2480 unsigned long alg_k
;
2483 alg_k
= s
->s3
->tmp
.new_cipher
->algorithm_mkey
;
2485 if ((alg_k
& SSL_PSK
)
2486 && !tls_construct_cke_psk_preamble(s
, pkt
, &al
))
2489 if (alg_k
& (SSL_kRSA
| SSL_kRSAPSK
)) {
2490 if (!tls_construct_cke_rsa(s
, pkt
, &al
))
2492 } else if (alg_k
& (SSL_kDHE
| SSL_kDHEPSK
)) {
2493 if (!tls_construct_cke_dhe(s
, pkt
, &al
))
2495 } else if (alg_k
& (SSL_kECDHE
| SSL_kECDHEPSK
)) {
2496 if (!tls_construct_cke_ecdhe(s
, pkt
, &al
))
2498 } else if (alg_k
& SSL_kGOST
) {
2499 if (!tls_construct_cke_gost(s
, pkt
, &al
))
2501 } else if (alg_k
& SSL_kSRP
) {
2502 if (!tls_construct_cke_srp(s
, pkt
, &al
))
2504 } else if (!(alg_k
& SSL_kPSK
)) {
2505 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_HANDSHAKE_FAILURE
);
2506 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE
, ERR_R_INTERNAL_ERROR
);
2513 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
2514 OPENSSL_clear_free(s
->s3
->tmp
.pms
, s
->s3
->tmp
.pmslen
);
2515 s
->s3
->tmp
.pms
= NULL
;
2516 #ifndef OPENSSL_NO_PSK
2517 OPENSSL_clear_free(s
->s3
->tmp
.psk
, s
->s3
->tmp
.psklen
);
2518 s
->s3
->tmp
.psk
= NULL
;
2523 int tls_client_key_exchange_post_work(SSL
*s
)
2525 unsigned char *pms
= NULL
;
2528 pms
= s
->s3
->tmp
.pms
;
2529 pmslen
= s
->s3
->tmp
.pmslen
;
2531 #ifndef OPENSSL_NO_SRP
2533 if (s
->s3
->tmp
.new_cipher
->algorithm_mkey
& SSL_kSRP
) {
2534 if (!srp_generate_client_master_secret(s
)) {
2535 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK
,
2536 ERR_R_INTERNAL_ERROR
);
2543 if (pms
== NULL
&& !(s
->s3
->tmp
.new_cipher
->algorithm_mkey
& SSL_kPSK
)) {
2544 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
2545 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK
, ERR_R_MALLOC_FAILURE
);
2548 if (!ssl_generate_master_secret(s
, pms
, pmslen
, 1)) {
2549 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
2550 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK
, ERR_R_INTERNAL_ERROR
);
2551 /* ssl_generate_master_secret frees the pms even on error */
2559 #ifndef OPENSSL_NO_SCTP
2560 if (SSL_IS_DTLS(s
)) {
2561 unsigned char sctpauthkey
[64];
2562 char labelbuffer
[sizeof(DTLS1_SCTP_AUTH_LABEL
)];
2565 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2568 memcpy(labelbuffer
, DTLS1_SCTP_AUTH_LABEL
,
2569 sizeof(DTLS1_SCTP_AUTH_LABEL
));
2571 if (SSL_export_keying_material(s
, sctpauthkey
,
2572 sizeof(sctpauthkey
), labelbuffer
,
2573 sizeof(labelbuffer
), NULL
, 0, 0) <= 0)
2576 BIO_ctrl(SSL_get_wbio(s
), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY
,
2577 sizeof(sctpauthkey
), sctpauthkey
);
2583 OPENSSL_clear_free(pms
, pmslen
);
2584 s
->s3
->tmp
.pms
= NULL
;
2588 int tls_construct_client_verify(SSL
*s
, WPACKET
*pkt
)
2591 const EVP_MD
*md
= s
->s3
->tmp
.md
[s
->cert
->key
- s
->cert
->pkeys
];
2592 EVP_MD_CTX
*mctx
= NULL
;
2596 unsigned char *sig
= NULL
;
2598 mctx
= EVP_MD_CTX_new();
2600 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY
, ERR_R_MALLOC_FAILURE
);
2603 pkey
= s
->cert
->key
->privatekey
;
2605 hdatalen
= BIO_get_mem_data(s
->s3
->handshake_buffer
, &hdata
);
2606 if (hdatalen
<= 0) {
2607 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY
, ERR_R_INTERNAL_ERROR
);
2610 if (SSL_USE_SIGALGS(s
)&& !tls12_get_sigandhash(pkt
, pkey
, md
)) {
2611 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY
, ERR_R_INTERNAL_ERROR
);
2615 fprintf(stderr
, "Using client alg %s\n", EVP_MD_name(md
));
2617 sig
= OPENSSL_malloc(EVP_PKEY_size(pkey
));
2619 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY
, ERR_R_MALLOC_FAILURE
);
2622 if (!EVP_SignInit_ex(mctx
, md
, NULL
)
2623 || !EVP_SignUpdate(mctx
, hdata
, hdatalen
)
2624 || (s
->version
== SSL3_VERSION
2625 && !EVP_MD_CTX_ctrl(mctx
, EVP_CTRL_SSL3_MASTER_SECRET
,
2626 (int)s
->session
->master_key_length
,
2627 s
->session
->master_key
))
2628 || !EVP_SignFinal(mctx
, sig
, &u
, pkey
)) {
2629 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY
, ERR_R_EVP_LIB
);
2632 #ifndef OPENSSL_NO_GOST
2634 int pktype
= EVP_PKEY_id(pkey
);
2635 if (pktype
== NID_id_GostR3410_2001
2636 || pktype
== NID_id_GostR3410_2012_256
2637 || pktype
== NID_id_GostR3410_2012_512
)
2638 BUF_reverse(sig
, NULL
, u
);
2642 if (!WPACKET_sub_memcpy_u16(pkt
, sig
, u
)) {
2643 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY
, ERR_R_INTERNAL_ERROR
);
2647 /* Digest cached records and discard handshake buffer */
2648 if (!ssl3_digest_cached_records(s
, 0))
2652 EVP_MD_CTX_free(mctx
);
2656 EVP_MD_CTX_free(mctx
);
2657 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
2662 * Check a certificate can be used for client authentication. Currently check
2663 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2664 * certificates can be used and optionally checks suitability for Suite B.
2666 static int ssl3_check_client_certificate(SSL
*s
)
2668 if (!s
->cert
|| !s
->cert
->key
->x509
|| !s
->cert
->key
->privatekey
)
2670 /* If no suitable signature algorithm can't use certificate */
2671 if (SSL_USE_SIGALGS(s
) && !s
->s3
->tmp
.md
[s
->cert
->key
- s
->cert
->pkeys
])
2674 * If strict mode check suitability of chain before using it. This also
2675 * adjusts suite B digest if necessary.
2677 if (s
->cert
->cert_flags
& SSL_CERT_FLAGS_CHECK_TLS_STRICT
&&
2678 !tls1_check_chain(s
, NULL
, NULL
, NULL
, -2))
2683 WORK_STATE
tls_prepare_client_certificate(SSL
*s
, WORK_STATE wst
)
2686 EVP_PKEY
*pkey
= NULL
;
2689 if (wst
== WORK_MORE_A
) {
2690 /* Let cert callback update client certificates if required */
2691 if (s
->cert
->cert_cb
) {
2692 i
= s
->cert
->cert_cb(s
, s
->cert
->cert_cb_arg
);
2694 s
->rwstate
= SSL_X509_LOOKUP
;
2698 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
2699 ossl_statem_set_error(s
);
2702 s
->rwstate
= SSL_NOTHING
;
2704 if (ssl3_check_client_certificate(s
))
2705 return WORK_FINISHED_CONTINUE
;
2707 /* Fall through to WORK_MORE_B */
2711 /* We need to get a client cert */
2712 if (wst
== WORK_MORE_B
) {
2714 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2715 * return(-1); We then get retied later
2717 i
= ssl_do_client_cert_cb(s
, &x509
, &pkey
);
2719 s
->rwstate
= SSL_X509_LOOKUP
;
2722 s
->rwstate
= SSL_NOTHING
;
2723 if ((i
== 1) && (pkey
!= NULL
) && (x509
!= NULL
)) {
2724 if (!SSL_use_certificate(s
, x509
) || !SSL_use_PrivateKey(s
, pkey
))
2726 } else if (i
== 1) {
2728 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE
,
2729 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK
);
2733 EVP_PKEY_free(pkey
);
2734 if (i
&& !ssl3_check_client_certificate(s
))
2737 if (s
->version
== SSL3_VERSION
) {
2738 s
->s3
->tmp
.cert_req
= 0;
2739 ssl3_send_alert(s
, SSL3_AL_WARNING
, SSL_AD_NO_CERTIFICATE
);
2740 return WORK_FINISHED_CONTINUE
;
2742 s
->s3
->tmp
.cert_req
= 2;
2743 if (!ssl3_digest_cached_records(s
, 0)) {
2744 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
2745 ossl_statem_set_error(s
);
2751 return WORK_FINISHED_CONTINUE
;
2754 /* Shouldn't ever get here */
2758 int tls_construct_client_certificate(SSL
*s
, WPACKET
*pkt
)
2760 if (!ssl3_output_cert_chain(s
, pkt
,
2761 (s
->s3
->tmp
.cert_req
== 2) ? NULL
2763 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE
, ERR_R_INTERNAL_ERROR
);
2764 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
2771 #define has_bits(i,m) (((i)&(m)) == (m))
2773 int ssl3_check_cert_and_algorithm(SSL
*s
)
2776 #ifndef OPENSSL_NO_EC
2780 EVP_PKEY
*pkey
= NULL
;
2781 int al
= SSL_AD_HANDSHAKE_FAILURE
;
2783 alg_k
= s
->s3
->tmp
.new_cipher
->algorithm_mkey
;
2784 alg_a
= s
->s3
->tmp
.new_cipher
->algorithm_auth
;
2786 /* we don't have a certificate */
2787 if ((alg_a
& SSL_aNULL
) || (alg_k
& SSL_kPSK
))
2790 /* This is the passed certificate */
2792 #ifndef OPENSSL_NO_EC
2793 idx
= s
->session
->peer_type
;
2794 if (idx
== SSL_PKEY_ECC
) {
2795 if (ssl_check_srvr_ecc_cert_and_alg(s
->session
->peer
, s
) == 0) {
2797 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM
, SSL_R_BAD_ECC_CERT
);
2802 } else if (alg_a
& SSL_aECDSA
) {
2803 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM
,
2804 SSL_R_MISSING_ECDSA_SIGNING_CERT
);
2808 pkey
= X509_get0_pubkey(s
->session
->peer
);
2809 i
= X509_certificate_type(s
->session
->peer
, pkey
);
2811 /* Check that we have a certificate if we require one */
2812 if ((alg_a
& SSL_aRSA
) && !has_bits(i
, EVP_PK_RSA
| EVP_PKT_SIGN
)) {
2813 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM
,
2814 SSL_R_MISSING_RSA_SIGNING_CERT
);
2817 #ifndef OPENSSL_NO_DSA
2818 else if ((alg_a
& SSL_aDSS
) && !has_bits(i
, EVP_PK_DSA
| EVP_PKT_SIGN
)) {
2819 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM
,
2820 SSL_R_MISSING_DSA_SIGNING_CERT
);
2824 #ifndef OPENSSL_NO_RSA
2825 if (alg_k
& (SSL_kRSA
| SSL_kRSAPSK
) &&
2826 !has_bits(i
, EVP_PK_RSA
| EVP_PKT_ENC
)) {
2827 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM
,
2828 SSL_R_MISSING_RSA_ENCRYPTING_CERT
);
2832 #ifndef OPENSSL_NO_DH
2833 if ((alg_k
& SSL_kDHE
) && (s
->s3
->peer_tmp
== NULL
)) {
2834 al
= SSL_AD_INTERNAL_ERROR
;
2835 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM
, ERR_R_INTERNAL_ERROR
);
2842 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
2846 #ifndef OPENSSL_NO_NEXTPROTONEG
2847 int tls_construct_next_proto(SSL
*s
, WPACKET
*pkt
)
2849 size_t len
, padding_len
;
2850 unsigned char *padding
= NULL
;
2852 len
= s
->next_proto_negotiated_len
;
2853 padding_len
= 32 - ((len
+ 2) % 32);
2855 if (!WPACKET_sub_memcpy_u8(pkt
, s
->next_proto_negotiated
, len
)
2856 || !WPACKET_sub_allocate_bytes_u8(pkt
, padding_len
, &padding
)) {
2857 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO
, ERR_R_INTERNAL_ERROR
);
2861 memset(padding
, 0, padding_len
);
2865 ssl3_send_alert(s
, SSL3_AL_FATAL
, SSL_AD_INTERNAL_ERROR
);
2870 int ssl_do_client_cert_cb(SSL
*s
, X509
**px509
, EVP_PKEY
**ppkey
)
2873 #ifndef OPENSSL_NO_ENGINE
2874 if (s
->ctx
->client_cert_engine
) {
2875 i
= ENGINE_load_ssl_client_cert(s
->ctx
->client_cert_engine
, s
,
2876 SSL_get_client_CA_list(s
),
2877 px509
, ppkey
, NULL
, NULL
, NULL
);
2882 if (s
->ctx
->client_cert_cb
)
2883 i
= s
->ctx
->client_cert_cb(s
, px509
, ppkey
);
2887 int ssl_cipher_list_to_bytes(SSL
*s
, STACK_OF(SSL_CIPHER
) *sk
, WPACKET
*pkt
)
2890 size_t totlen
= 0, len
, maxlen
;
2891 int empty_reneg_info_scsv
= !s
->renegotiate
;
2892 /* Set disabled masks for this session */
2893 ssl_set_client_disabled(s
);
2898 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
2899 # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6
2900 # error Max cipher length too short
2903 * Some servers hang if client hello > 256 bytes as hack workaround
2904 * chop number of supported ciphers to keep it well below this if we
2907 if (TLS1_get_version(s
) >= TLS1_2_VERSION
)
2908 maxlen
= OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
& ~1;
2911 /* Maximum length that can be stored in 2 bytes. Length must be even */
2914 if (empty_reneg_info_scsv
)
2916 if (s
->mode
& SSL_MODE_SEND_FALLBACK_SCSV
)
2919 for (i
= 0; i
< sk_SSL_CIPHER_num(sk
) && totlen
< maxlen
; i
++) {
2920 const SSL_CIPHER
*c
;
2922 c
= sk_SSL_CIPHER_value(sk
, i
);
2923 /* Skip disabled ciphers */
2924 if (ssl_cipher_disabled(s
, c
, SSL_SECOP_CIPHER_SUPPORTED
))
2927 if (!s
->method
->put_cipher_by_char(c
, pkt
, &len
)) {
2928 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES
, ERR_R_INTERNAL_ERROR
);
2936 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES
, SSL_R_NO_CIPHERS_AVAILABLE
);
2941 if (empty_reneg_info_scsv
) {
2942 static SSL_CIPHER scsv
= {
2943 0, NULL
, SSL3_CK_SCSV
, 0, 0, 0, 0, 0, 0, 0, 0, 0
2945 if (!s
->method
->put_cipher_by_char(&scsv
, pkt
, &len
)) {
2946 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES
, ERR_R_INTERNAL_ERROR
);
2950 if (s
->mode
& SSL_MODE_SEND_FALLBACK_SCSV
) {
2951 static SSL_CIPHER scsv
= {
2952 0, NULL
, SSL3_CK_FALLBACK_SCSV
, 0, 0, 0, 0, 0, 0, 0, 0, 0
2954 if (!s
->method
->put_cipher_by_char(&scsv
, pkt
, &len
)) {
2955 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES
, ERR_R_INTERNAL_ERROR
);