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)
873 unsigned int cookie_len;
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);
1362 BN_bin2bn(PACKET_data(&prime),
1363 PACKET_remaining(&prime), NULL)) == NULL
1365 BN_bin2bn(PACKET_data(&generator),
1366 PACKET_remaining(&generator), NULL)) == NULL
1368 BN_bin2bn(PACKET_data(&salt),
1369 PACKET_remaining(&salt), NULL)) == NULL
1371 BN_bin2bn(PACKET_data(&server_pub),
1372 PACKET_remaining(&server_pub), NULL)) == NULL) {
1373 *al = SSL_AD_INTERNAL_ERROR;
1374 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
1378 if (!srp_verify_server_param(s, al)) {
1379 *al = SSL_AD_DECODE_ERROR;
1380 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
1384 /* We must check if there is a certificate */
1385 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1386 *pkey = X509_get0_pubkey(s->session->peer);
1390 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
1391 *al = SSL_AD_INTERNAL_ERROR;
1396 static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1398 #ifndef OPENSSL_NO_DH
1399 PACKET prime, generator, pub_key;
1400 EVP_PKEY *peer_tmp = NULL;
1403 BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
1405 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1406 || !PACKET_get_length_prefixed_2(pkt, &generator)
1407 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1408 *al = SSL_AD_DECODE_ERROR;
1409 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
1413 peer_tmp = EVP_PKEY_new();
1416 if (peer_tmp == NULL || dh == NULL) {
1417 *al = SSL_AD_INTERNAL_ERROR;
1418 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
1422 p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
1423 g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), NULL);
1424 bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
1426 if (p == NULL || g == NULL || bnpub_key == NULL) {
1427 *al = SSL_AD_INTERNAL_ERROR;
1428 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1432 if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) {
1433 *al = SSL_AD_DECODE_ERROR;
1434 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
1438 if (!DH_set0_pqg(dh, p, NULL, g)) {
1439 *al = SSL_AD_INTERNAL_ERROR;
1440 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1445 if (!DH_set0_key(dh, bnpub_key, NULL)) {
1446 *al = SSL_AD_INTERNAL_ERROR;
1447 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1452 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1453 *al = SSL_AD_HANDSHAKE_FAILURE;
1454 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
1458 if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
1459 *al = SSL_AD_INTERNAL_ERROR;
1460 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
1464 s->s3->peer_tmp = peer_tmp;
1467 * FIXME: This makes assumptions about which ciphersuites come with
1468 * public keys. We should have a less ad-hoc way of doing this
1470 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1471 *pkey = X509_get0_pubkey(s->session->peer);
1472 /* else anonymous DH, so no certificate or pkey. */
1481 EVP_PKEY_free(peer_tmp);
1485 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
1486 *al = SSL_AD_INTERNAL_ERROR;
1491 static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1493 #ifndef OPENSSL_NO_EC
1495 const unsigned char *ecparams;
1497 unsigned int curve_flags;
1498 EVP_PKEY_CTX *pctx = NULL;
1501 * Extract elliptic curve parameters and the server's ephemeral ECDH
1502 * public key. For now we only support named (not generic) curves and
1503 * ECParameters in this case is just three bytes.
1505 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1506 *al = SSL_AD_DECODE_ERROR;
1507 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
1511 * Check curve is one of our preferences, if not server has sent an
1512 * invalid curve. ECParameters is 3 bytes.
1514 if (!tls1_check_curve(s, ecparams, 3)) {
1515 *al = SSL_AD_DECODE_ERROR;
1516 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
1520 curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
1522 if (curve_nid == 0) {
1523 *al = SSL_AD_INTERNAL_ERROR;
1524 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
1525 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1529 if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
1530 EVP_PKEY *key = EVP_PKEY_new();
1532 if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
1533 *al = SSL_AD_INTERNAL_ERROR;
1534 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1538 s->s3->peer_tmp = key;
1540 /* Set up EVP_PKEY with named curve as parameters */
1541 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
1543 || EVP_PKEY_paramgen_init(pctx) <= 0
1544 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
1545 || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
1546 *al = SSL_AD_INTERNAL_ERROR;
1547 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1548 EVP_PKEY_CTX_free(pctx);
1551 EVP_PKEY_CTX_free(pctx);
1555 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1556 *al = SSL_AD_DECODE_ERROR;
1557 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
1561 if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
1562 PACKET_data(&encoded_pt),
1563 PACKET_remaining(&encoded_pt))) {
1564 *al = SSL_AD_DECODE_ERROR;
1565 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
1570 * The ECC/TLS specification does not mention the use of DSA to sign
1571 * ECParameters in the server key exchange message. We do support RSA
1574 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
1575 *pkey = X509_get0_pubkey(s->session->peer);
1576 else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
1577 *pkey = X509_get0_pubkey(s->session->peer);
1578 /* else anonymous ECDH, so no certificate or pkey. */
1582 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
1583 *al = SSL_AD_INTERNAL_ERROR;
1588 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1592 EVP_PKEY *pkey = NULL;
1593 PACKET save_param_start, signature;
1595 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1597 save_param_start = *pkt;
1599 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1600 EVP_PKEY_free(s->s3->peer_tmp);
1601 s->s3->peer_tmp = NULL;
1604 if (alg_k & SSL_PSK) {
1605 if (!tls_process_ske_psk_preamble(s, pkt, &al))
1609 /* Nothing else to do for plain PSK or RSAPSK */
1610 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1611 } else if (alg_k & SSL_kSRP) {
1612 if (!tls_process_ske_srp(s, pkt, &pkey, &al))
1614 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1615 if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
1617 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1618 if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
1621 al = SSL_AD_UNEXPECTED_MESSAGE;
1622 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1626 /* if it was signed, check the signature */
1630 const EVP_MD *md = NULL;
1634 * |pkt| now points to the beginning of the signature, so the difference
1635 * equals the length of the parameters.
1637 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1638 PACKET_remaining(&save_param_start) -
1639 PACKET_remaining(pkt))) {
1640 al = SSL_AD_INTERNAL_ERROR;
1641 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1645 if (SSL_USE_SIGALGS(s)) {
1646 const unsigned char *sigalgs;
1648 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1649 al = SSL_AD_DECODE_ERROR;
1650 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1653 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1655 al = SSL_AD_INTERNAL_ERROR;
1657 } else if (rv == 0) {
1658 al = SSL_AD_DECODE_ERROR;
1662 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1664 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
1665 md = EVP_md5_sha1();
1670 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1671 || PACKET_remaining(pkt) != 0) {
1672 al = SSL_AD_DECODE_ERROR;
1673 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1676 maxsig = EVP_PKEY_size(pkey);
1678 al = SSL_AD_INTERNAL_ERROR;
1679 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1684 * Check signature length
1686 if (PACKET_remaining(&signature) > (size_t)maxsig) {
1687 /* wrong packet length */
1688 al = SSL_AD_DECODE_ERROR;
1689 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1690 SSL_R_WRONG_SIGNATURE_LENGTH);
1694 md_ctx = EVP_MD_CTX_new();
1695 if (md_ctx == NULL) {
1696 al = SSL_AD_INTERNAL_ERROR;
1697 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1701 if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
1702 || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
1703 SSL3_RANDOM_SIZE) <= 0
1704 || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
1705 SSL3_RANDOM_SIZE) <= 0
1706 || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
1707 PACKET_remaining(¶ms)) <= 0) {
1708 EVP_MD_CTX_free(md_ctx);
1709 al = SSL_AD_INTERNAL_ERROR;
1710 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1713 if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
1714 PACKET_remaining(&signature), pkey) <= 0) {
1716 EVP_MD_CTX_free(md_ctx);
1717 al = SSL_AD_DECRYPT_ERROR;
1718 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1721 EVP_MD_CTX_free(md_ctx);
1723 /* aNULL, aSRP or PSK do not need public keys */
1724 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
1725 && !(alg_k & SSL_PSK)) {
1726 /* Might be wrong key type, check it */
1727 if (ssl3_check_cert_and_algorithm(s)) {
1728 /* Otherwise this shouldn't happen */
1729 al = SSL_AD_INTERNAL_ERROR;
1730 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1732 al = SSL_AD_DECODE_ERROR;
1736 /* still data left over */
1737 if (PACKET_remaining(pkt) != 0) {
1738 al = SSL_AD_DECODE_ERROR;
1739 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1744 return MSG_PROCESS_CONTINUE_READING;
1747 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1748 ossl_statem_set_error(s);
1749 return MSG_PROCESS_ERROR;
1752 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
1754 int ret = MSG_PROCESS_ERROR;
1755 unsigned int list_len, ctype_num, i, name_len;
1756 X509_NAME *xn = NULL;
1757 const unsigned char *data;
1758 const unsigned char *namestart, *namebytes;
1759 STACK_OF(X509_NAME) *ca_sk = NULL;
1761 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1762 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1766 /* get the certificate types */
1767 if (!PACKET_get_1(pkt, &ctype_num)
1768 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
1769 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1770 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1773 OPENSSL_free(s->cert->ctypes);
1774 s->cert->ctypes = NULL;
1775 if (ctype_num > SSL3_CT_NUMBER) {
1776 /* If we exceed static buffer copy all to cert structure */
1777 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1778 if (s->cert->ctypes == NULL) {
1779 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1782 memcpy(s->cert->ctypes, data, ctype_num);
1783 s->cert->ctype_num = (size_t)ctype_num;
1784 ctype_num = SSL3_CT_NUMBER;
1786 for (i = 0; i < ctype_num; i++)
1787 s->s3->tmp.ctype[i] = data[i];
1789 if (SSL_USE_SIGALGS(s)) {
1790 if (!PACKET_get_net_2(pkt, &list_len)
1791 || !PACKET_get_bytes(pkt, &data, list_len)) {
1792 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1793 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1794 SSL_R_LENGTH_MISMATCH);
1798 /* Clear certificate digests and validity flags */
1799 for (i = 0; i < SSL_PKEY_NUM; i++) {
1800 s->s3->tmp.md[i] = NULL;
1801 s->s3->tmp.valid_flags[i] = 0;
1803 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1804 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1805 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1806 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1809 if (!tls1_process_sigalgs(s)) {
1810 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1811 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1815 ssl_set_default_md(s);
1818 /* get the CA RDNs */
1819 if (!PACKET_get_net_2(pkt, &list_len)
1820 || PACKET_remaining(pkt) != list_len) {
1821 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1822 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1826 while (PACKET_remaining(pkt)) {
1827 if (!PACKET_get_net_2(pkt, &name_len)
1828 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
1829 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1830 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1831 SSL_R_LENGTH_MISMATCH);
1835 namestart = namebytes;
1837 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
1838 name_len)) == NULL) {
1839 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1840 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1844 if (namebytes != (namestart + name_len)) {
1845 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1846 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1847 SSL_R_CA_DN_LENGTH_MISMATCH);
1850 if (!sk_X509_NAME_push(ca_sk, xn)) {
1851 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1857 /* we should setup a certificate to return.... */
1858 s->s3->tmp.cert_req = 1;
1859 s->s3->tmp.ctype_num = ctype_num;
1860 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1861 s->s3->tmp.ca_names = ca_sk;
1864 ret = MSG_PROCESS_CONTINUE_PROCESSING;
1867 ossl_statem_set_error(s);
1870 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1874 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
1876 return (X509_NAME_cmp(*a, *b));
1879 MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
1882 unsigned int ticklen;
1883 unsigned long ticket_lifetime_hint;
1884 unsigned int sess_len;
1886 if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
1887 || !PACKET_get_net_2(pkt, &ticklen)
1888 || PACKET_remaining(pkt) != ticklen) {
1889 al = SSL_AD_DECODE_ERROR;
1890 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1894 /* Server is allowed to change its mind and send an empty ticket. */
1896 return MSG_PROCESS_CONTINUE_READING;
1898 if (s->session->session_id_length > 0) {
1899 int i = s->session_ctx->session_cache_mode;
1900 SSL_SESSION *new_sess;
1902 * We reused an existing session, so we need to replace it with a new
1905 if (i & SSL_SESS_CACHE_CLIENT) {
1907 * Remove the old session from the cache. We carry on if this fails
1909 SSL_CTX_remove_session(s->session_ctx, s->session);
1912 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1913 al = SSL_AD_INTERNAL_ERROR;
1914 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1918 SSL_SESSION_free(s->session);
1919 s->session = new_sess;
1922 OPENSSL_free(s->session->tlsext_tick);
1923 s->session->tlsext_ticklen = 0;
1925 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1926 if (s->session->tlsext_tick == NULL) {
1927 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1930 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
1931 al = SSL_AD_DECODE_ERROR;
1932 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1936 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
1937 s->session->tlsext_ticklen = ticklen;
1939 * There are two ways to detect a resumed ticket session. One is to set
1940 * an appropriate session ID and then the server must return a match in
1941 * ServerHello. This allows the normal client session ID matching to work
1942 * and we know much earlier that the ticket has been accepted. The
1943 * other way is to set zero length session ID when the ticket is
1944 * presented and rely on the handshake to determine session resumption.
1945 * We choose the former approach because this fits in with assumptions
1946 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1947 * SHA256 is disabled) hash of the ticket.
1950 * TODO(size_t): we use sess_len here because EVP_Digest expects an int
1951 * but s->session->session_id_length is a size_t
1953 if (!EVP_Digest(s->session->tlsext_tick, ticklen,
1954 s->session->session_id, &sess_len,
1955 EVP_sha256(), NULL)) {
1956 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
1959 s->session->session_id_length = sess_len;
1960 return MSG_PROCESS_CONTINUE_READING;
1962 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1964 ossl_statem_set_error(s);
1965 return MSG_PROCESS_ERROR;
1968 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
1971 unsigned long resplen;
1974 if (!PACKET_get_1(pkt, &type)
1975 || type != TLSEXT_STATUSTYPE_ocsp) {
1976 al = SSL_AD_DECODE_ERROR;
1977 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1980 if (!PACKET_get_net_3(pkt, &resplen)
1981 || PACKET_remaining(pkt) != resplen) {
1982 al = SSL_AD_DECODE_ERROR;
1983 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1986 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
1987 if (s->tlsext_ocsp_resp == NULL) {
1988 al = SSL_AD_INTERNAL_ERROR;
1989 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1992 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
1993 al = SSL_AD_DECODE_ERROR;
1994 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1997 s->tlsext_ocsp_resplen = resplen;
1998 return MSG_PROCESS_CONTINUE_READING;
2000 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2001 ossl_statem_set_error(s);
2002 return MSG_PROCESS_ERROR;
2005 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
2007 if (PACKET_remaining(pkt) > 0) {
2008 /* should contain no data */
2009 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2010 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2011 ossl_statem_set_error(s);
2012 return MSG_PROCESS_ERROR;
2014 #ifndef OPENSSL_NO_SRP
2015 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2016 if (SRP_Calc_A_param(s) <= 0) {
2017 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2018 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2019 ossl_statem_set_error(s);
2020 return MSG_PROCESS_ERROR;
2026 * at this point we check that we have the required stuff from
2029 if (!ssl3_check_cert_and_algorithm(s)) {
2030 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2031 ossl_statem_set_error(s);
2032 return MSG_PROCESS_ERROR;
2036 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2037 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2038 * message, or NULL and -1 otherwise
2040 if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
2042 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2044 ssl3_send_alert(s, SSL3_AL_FATAL,
2045 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
2046 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
2047 SSL_R_INVALID_STATUS_RESPONSE);
2048 return MSG_PROCESS_ERROR;
2051 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2052 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
2053 return MSG_PROCESS_ERROR;
2056 #ifndef OPENSSL_NO_CT
2057 if (s->ct_validation_callback != NULL) {
2058 /* Note we validate the SCTs whether or not we abort on error */
2059 if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
2060 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2061 return MSG_PROCESS_ERROR;
2066 #ifndef OPENSSL_NO_SCTP
2067 /* Only applies to renegotiation */
2068 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2069 && s->renegotiate != 0)
2070 return MSG_PROCESS_CONTINUE_PROCESSING;
2073 return MSG_PROCESS_FINISHED_READING;
2076 static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al)
2078 #ifndef OPENSSL_NO_PSK
2081 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2082 * \0-terminated identity. The last byte is for us for simulating
2085 char identity[PSK_MAX_IDENTITY_LEN + 1];
2086 size_t identitylen = 0;
2087 unsigned char psk[PSK_MAX_PSK_LEN];
2088 unsigned char *tmppsk = NULL;
2089 char *tmpidentity = NULL;
2092 if (s->psk_client_callback == NULL) {
2093 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
2094 *al = SSL_AD_INTERNAL_ERROR;
2098 memset(identity, 0, sizeof(identity));
2100 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2101 identity, sizeof(identity) - 1,
2104 if (psklen > PSK_MAX_PSK_LEN) {
2105 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2106 *al = SSL_AD_HANDSHAKE_FAILURE;
2108 } else if (psklen == 0) {
2109 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
2110 SSL_R_PSK_IDENTITY_NOT_FOUND);
2111 *al = SSL_AD_HANDSHAKE_FAILURE;
2115 identitylen = strlen(identity);
2116 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2117 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2118 *al = SSL_AD_HANDSHAKE_FAILURE;
2122 tmppsk = OPENSSL_memdup(psk, psklen);
2123 tmpidentity = OPENSSL_strdup(identity);
2124 if (tmppsk == NULL || tmpidentity == NULL) {
2125 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
2126 *al = SSL_AD_INTERNAL_ERROR;
2130 OPENSSL_free(s->s3->tmp.psk);
2131 s->s3->tmp.psk = tmppsk;
2132 s->s3->tmp.psklen = psklen;
2134 OPENSSL_free(s->session->psk_identity);
2135 s->session->psk_identity = tmpidentity;
2138 if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) {
2139 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2140 *al = SSL_AD_INTERNAL_ERROR;
2147 OPENSSL_cleanse(psk, psklen);
2148 OPENSSL_cleanse(identity, sizeof(identity));
2149 OPENSSL_clear_free(tmppsk, psklen);
2150 OPENSSL_clear_free(tmpidentity, identitylen);
2154 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2155 *al = SSL_AD_INTERNAL_ERROR;
2160 static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al)
2162 #ifndef OPENSSL_NO_RSA
2163 unsigned char *encdata = NULL;
2164 EVP_PKEY *pkey = NULL;
2165 EVP_PKEY_CTX *pctx = NULL;
2167 unsigned char *pms = NULL;
2170 if (s->session->peer == NULL) {
2172 * We should always have a server certificate with SSL_kRSA.
2174 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2178 pkey = X509_get0_pubkey(s->session->peer);
2179 if (EVP_PKEY_get0_RSA(pkey) == NULL) {
2180 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2184 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2185 pms = OPENSSL_malloc(pmslen);
2187 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
2188 *al = SSL_AD_INTERNAL_ERROR;
2192 pms[0] = s->client_version >> 8;
2193 pms[1] = s->client_version & 0xff;
2194 if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
2198 /* Fix buf for TLS and beyond */
2199 if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) {
2200 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2203 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2204 if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
2205 || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
2206 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
2209 if (!WPACKET_allocate_bytes(pkt, enclen, &encdata)
2210 || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) {
2211 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
2214 EVP_PKEY_CTX_free(pctx);
2217 if (s->options & SSL_OP_PKCS1_CHECK_1)
2219 if (s->options & SSL_OP_PKCS1_CHECK_2)
2223 /* Fix buf for TLS and beyond */
2224 if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) {
2225 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2229 s->s3->tmp.pms = pms;
2230 s->s3->tmp.pmslen = pmslen;
2234 OPENSSL_clear_free(pms, pmslen);
2235 EVP_PKEY_CTX_free(pctx);
2239 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2240 *al = SSL_AD_INTERNAL_ERROR;
2245 static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al)
2247 #ifndef OPENSSL_NO_DH
2249 const BIGNUM *pub_key;
2250 EVP_PKEY *ckey = NULL, *skey = NULL;
2251 unsigned char *keybytes = NULL;
2253 skey = s->s3->peer_tmp;
2257 ckey = ssl_generate_pkey(skey);
2258 dh_clnt = EVP_PKEY_get0_DH(ckey);
2260 if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0)
2263 /* send off the data */
2264 DH_get0_key(dh_clnt, &pub_key, NULL);
2265 if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes))
2268 BN_bn2bin(pub_key, keybytes);
2269 EVP_PKEY_free(ckey);
2273 EVP_PKEY_free(ckey);
2275 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2276 *al = SSL_AD_INTERNAL_ERROR;
2280 static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al)
2282 #ifndef OPENSSL_NO_EC
2283 unsigned char *encodedPoint = NULL;
2284 int encoded_pt_len = 0;
2285 EVP_PKEY *ckey = NULL, *skey = NULL;
2288 skey = s->s3->peer_tmp;
2290 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2294 ckey = ssl_generate_pkey(skey);
2296 if (ssl_derive(s, ckey, skey) == 0) {
2297 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
2301 /* Generate encoding of client key */
2302 encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
2304 if (encoded_pt_len == 0) {
2305 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
2309 if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) {
2310 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2316 OPENSSL_free(encodedPoint);
2317 EVP_PKEY_free(ckey);
2320 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2321 *al = SSL_AD_INTERNAL_ERROR;
2326 static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al)
2328 #ifndef OPENSSL_NO_GOST
2329 /* GOST key exchange message creation */
2330 EVP_PKEY_CTX *pkey_ctx = NULL;
2333 unsigned int md_len;
2334 unsigned char shared_ukm[32], tmp[256];
2335 EVP_MD_CTX *ukm_hash = NULL;
2336 int dgst_nid = NID_id_GostR3411_94;
2337 unsigned char *pms = NULL;
2340 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2341 dgst_nid = NID_id_GostR3411_2012_256;
2344 * Get server sertificate PKEY and create ctx from it
2346 peer_cert = s->session->peer;
2348 *al = SSL_AD_HANDSHAKE_FAILURE;
2349 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
2350 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2354 pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
2355 if (pkey_ctx == NULL) {
2356 *al = SSL_AD_INTERNAL_ERROR;
2357 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2361 * If we have send a certificate, and certificate key
2362 * parameters match those of server certificate, use
2363 * certificate key for key exchange
2366 /* Otherwise, generate ephemeral key pair */
2368 pms = OPENSSL_malloc(pmslen);
2370 *al = SSL_AD_INTERNAL_ERROR;
2371 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2375 if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2376 /* Generate session key */
2377 || RAND_bytes(pms, pmslen) <= 0) {
2378 *al = SSL_AD_INTERNAL_ERROR;
2379 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2383 * Compute shared IV and store it in algorithm-specific context
2386 ukm_hash = EVP_MD_CTX_new();
2387 if (ukm_hash == NULL
2388 || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0
2389 || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2390 SSL3_RANDOM_SIZE) <= 0
2391 || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2392 SSL3_RANDOM_SIZE) <= 0
2393 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
2394 *al = SSL_AD_INTERNAL_ERROR;
2395 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2398 EVP_MD_CTX_free(ukm_hash);
2400 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
2401 EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
2402 *al = SSL_AD_INTERNAL_ERROR;
2403 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2406 /* Make GOST keytransport blob message */
2408 * Encapsulate it into sequence
2411 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
2412 *al = SSL_AD_INTERNAL_ERROR;
2413 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2417 if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)
2418 || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81))
2419 || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) {
2420 *al = SSL_AD_INTERNAL_ERROR;
2421 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2425 EVP_PKEY_CTX_free(pkey_ctx);
2426 s->s3->tmp.pms = pms;
2427 s->s3->tmp.pmslen = pmslen;
2431 EVP_PKEY_CTX_free(pkey_ctx);
2432 OPENSSL_clear_free(pms, pmslen);
2433 EVP_MD_CTX_free(ukm_hash);
2436 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2437 *al = SSL_AD_INTERNAL_ERROR;
2442 static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al)
2444 #ifndef OPENSSL_NO_SRP
2445 unsigned char *abytes = NULL;
2447 if (s->srp_ctx.A == NULL
2448 || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A),
2450 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2453 BN_bn2bin(s->srp_ctx.A, abytes);
2455 OPENSSL_free(s->session->srp_username);
2456 s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
2457 if (s->session->srp_username == NULL) {
2458 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE);
2464 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2465 *al = SSL_AD_INTERNAL_ERROR;
2470 int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt)
2472 unsigned long alg_k;
2475 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2477 if ((alg_k & SSL_PSK)
2478 && !tls_construct_cke_psk_preamble(s, pkt, &al))
2481 if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2482 if (!tls_construct_cke_rsa(s, pkt, &al))
2484 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
2485 if (!tls_construct_cke_dhe(s, pkt, &al))
2487 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
2488 if (!tls_construct_cke_ecdhe(s, pkt, &al))
2490 } else if (alg_k & SSL_kGOST) {
2491 if (!tls_construct_cke_gost(s, pkt, &al))
2493 } else if (alg_k & SSL_kSRP) {
2494 if (!tls_construct_cke_srp(s, pkt, &al))
2496 } else if (!(alg_k & SSL_kPSK)) {
2497 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2498 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2505 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2506 OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
2507 s->s3->tmp.pms = NULL;
2508 #ifndef OPENSSL_NO_PSK
2509 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2510 s->s3->tmp.psk = NULL;
2515 int tls_client_key_exchange_post_work(SSL *s)
2517 unsigned char *pms = NULL;
2520 pms = s->s3->tmp.pms;
2521 pmslen = s->s3->tmp.pmslen;
2523 #ifndef OPENSSL_NO_SRP
2525 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2526 if (!srp_generate_client_master_secret(s)) {
2527 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2528 ERR_R_INTERNAL_ERROR);
2535 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2536 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2537 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2540 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2541 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2542 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2543 /* ssl_generate_master_secret frees the pms even on error */
2551 #ifndef OPENSSL_NO_SCTP
2552 if (SSL_IS_DTLS(s)) {
2553 unsigned char sctpauthkey[64];
2554 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2557 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2560 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
2561 sizeof(DTLS1_SCTP_AUTH_LABEL));
2563 if (SSL_export_keying_material(s, sctpauthkey,
2564 sizeof(sctpauthkey), labelbuffer,
2565 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2568 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2569 sizeof(sctpauthkey), sctpauthkey);
2575 OPENSSL_clear_free(pms, pmslen);
2576 s->s3->tmp.pms = NULL;
2580 int tls_construct_client_verify(SSL *s, WPACKET *pkt)
2583 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2584 EVP_MD_CTX *mctx = NULL;
2588 unsigned char *sig = NULL;
2590 mctx = EVP_MD_CTX_new();
2592 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2595 pkey = s->cert->key->privatekey;
2597 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2598 if (hdatalen <= 0) {
2599 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2602 if (SSL_USE_SIGALGS(s)&& !tls12_get_sigandhash(pkt, pkey, md)) {
2603 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2607 fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
2609 sig = OPENSSL_malloc(EVP_PKEY_size(pkey));
2611 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2614 if (!EVP_SignInit_ex(mctx, md, NULL)
2615 || !EVP_SignUpdate(mctx, hdata, hdatalen)
2616 || (s->version == SSL3_VERSION
2617 && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
2618 s->session->master_key_length,
2619 s->session->master_key))
2620 || !EVP_SignFinal(mctx, sig, &u, pkey)) {
2621 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
2624 #ifndef OPENSSL_NO_GOST
2626 int pktype = EVP_PKEY_id(pkey);
2627 if (pktype == NID_id_GostR3410_2001
2628 || pktype == NID_id_GostR3410_2012_256
2629 || pktype == NID_id_GostR3410_2012_512)
2630 BUF_reverse(sig, NULL, u);
2634 if (!WPACKET_sub_memcpy_u16(pkt, sig, u)) {
2635 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2639 /* Digest cached records and discard handshake buffer */
2640 if (!ssl3_digest_cached_records(s, 0))
2644 EVP_MD_CTX_free(mctx);
2648 EVP_MD_CTX_free(mctx);
2649 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2654 * Check a certificate can be used for client authentication. Currently check
2655 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2656 * certificates can be used and optionally checks suitability for Suite B.
2658 static int ssl3_check_client_certificate(SSL *s)
2660 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
2662 /* If no suitable signature algorithm can't use certificate */
2663 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
2666 * If strict mode check suitability of chain before using it. This also
2667 * adjusts suite B digest if necessary.
2669 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
2670 !tls1_check_chain(s, NULL, NULL, NULL, -2))
2675 WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
2678 EVP_PKEY *pkey = NULL;
2681 if (wst == WORK_MORE_A) {
2682 /* Let cert callback update client certificates if required */
2683 if (s->cert->cert_cb) {
2684 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
2686 s->rwstate = SSL_X509_LOOKUP;
2690 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2691 ossl_statem_set_error(s);
2694 s->rwstate = SSL_NOTHING;
2696 if (ssl3_check_client_certificate(s))
2697 return WORK_FINISHED_CONTINUE;
2699 /* Fall through to WORK_MORE_B */
2703 /* We need to get a client cert */
2704 if (wst == WORK_MORE_B) {
2706 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2707 * return(-1); We then get retied later
2709 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2711 s->rwstate = SSL_X509_LOOKUP;
2714 s->rwstate = SSL_NOTHING;
2715 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2716 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2718 } else if (i == 1) {
2720 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
2721 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2725 EVP_PKEY_free(pkey);
2726 if (i && !ssl3_check_client_certificate(s))
2729 if (s->version == SSL3_VERSION) {
2730 s->s3->tmp.cert_req = 0;
2731 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2732 return WORK_FINISHED_CONTINUE;
2734 s->s3->tmp.cert_req = 2;
2735 if (!ssl3_digest_cached_records(s, 0)) {
2736 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2737 ossl_statem_set_error(s);
2743 return WORK_FINISHED_CONTINUE;
2746 /* Shouldn't ever get here */
2750 int tls_construct_client_certificate(SSL *s, WPACKET *pkt)
2752 if (!ssl3_output_cert_chain(s, pkt,
2753 (s->s3->tmp.cert_req == 2) ? NULL
2755 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
2756 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2763 #define has_bits(i,m) (((i)&(m)) == (m))
2765 int ssl3_check_cert_and_algorithm(SSL *s)
2768 #ifndef OPENSSL_NO_EC
2772 EVP_PKEY *pkey = NULL;
2773 int al = SSL_AD_HANDSHAKE_FAILURE;
2775 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2776 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2778 /* we don't have a certificate */
2779 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
2782 /* This is the passed certificate */
2784 #ifndef OPENSSL_NO_EC
2785 idx = s->session->peer_type;
2786 if (idx == SSL_PKEY_ECC) {
2787 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
2789 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2794 } else if (alg_a & SSL_aECDSA) {
2795 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2796 SSL_R_MISSING_ECDSA_SIGNING_CERT);
2800 pkey = X509_get0_pubkey(s->session->peer);
2801 i = X509_certificate_type(s->session->peer, pkey);
2803 /* Check that we have a certificate if we require one */
2804 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2805 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2806 SSL_R_MISSING_RSA_SIGNING_CERT);
2809 #ifndef OPENSSL_NO_DSA
2810 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2811 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2812 SSL_R_MISSING_DSA_SIGNING_CERT);
2816 #ifndef OPENSSL_NO_RSA
2817 if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
2818 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2819 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2820 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2824 #ifndef OPENSSL_NO_DH
2825 if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
2826 al = SSL_AD_INTERNAL_ERROR;
2827 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
2834 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2838 #ifndef OPENSSL_NO_NEXTPROTONEG
2839 int tls_construct_next_proto(SSL *s, WPACKET *pkt)
2841 size_t len, padding_len;
2842 unsigned char *padding = NULL;
2844 len = s->next_proto_negotiated_len;
2845 padding_len = 32 - ((len + 2) % 32);
2847 if (!WPACKET_sub_memcpy_u8(pkt, s->next_proto_negotiated, len)
2848 || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) {
2849 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2853 memset(padding, 0, padding_len);
2857 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2862 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2865 #ifndef OPENSSL_NO_ENGINE
2866 if (s->ctx->client_cert_engine) {
2867 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2868 SSL_get_client_CA_list(s),
2869 px509, ppkey, NULL, NULL, NULL);
2874 if (s->ctx->client_cert_cb)
2875 i = s->ctx->client_cert_cb(s, px509, ppkey);
2879 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt)
2882 size_t totlen = 0, len, maxlen;
2883 int empty_reneg_info_scsv = !s->renegotiate;
2884 /* Set disabled masks for this session */
2885 ssl_set_client_disabled(s);
2890 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
2891 # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6
2892 # error Max cipher length too short
2895 * Some servers hang if client hello > 256 bytes as hack workaround
2896 * chop number of supported ciphers to keep it well below this if we
2899 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2900 maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
2903 /* Maximum length that can be stored in 2 bytes. Length must be even */
2906 if (empty_reneg_info_scsv)
2908 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
2911 for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) {
2912 const SSL_CIPHER *c;
2914 c = sk_SSL_CIPHER_value(sk, i);
2915 /* Skip disabled ciphers */
2916 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
2919 if (!s->method->put_cipher_by_char(c, pkt, &len)) {
2920 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2928 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE);
2933 if (empty_reneg_info_scsv) {
2934 static SSL_CIPHER scsv = {
2935 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2937 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2938 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2942 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
2943 static SSL_CIPHER scsv = {
2944 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2946 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2947 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);