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 i = s->session->session_id_length;
794 if (i > (int)sizeof(s->session->session_id)
795 || !WPACKET_start_sub_packet_u8(pkt)
796 || (i != 0 && !WPACKET_memcpy(pkt, s->session->session_id, i))
797 || !WPACKET_close(pkt)) {
798 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
802 /* cookie stuff for DTLS */
803 if (SSL_IS_DTLS(s)) {
804 if (s->d1->cookie_len > sizeof(s->d1->cookie)
805 || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie,
806 s->d1->cookie_len)) {
807 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
812 /* Ciphers supported */
813 if (!WPACKET_start_sub_packet_u16(pkt)) {
814 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
817 /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */
818 if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt))
820 if (!WPACKET_close(pkt)) {
821 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
826 if (!WPACKET_start_sub_packet_u8(pkt)) {
827 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
830 #ifndef OPENSSL_NO_COMP
831 if (ssl_allow_compression(s) && s->ctx->comp_methods) {
832 int compnum = sk_SSL_COMP_num(s->ctx->comp_methods);
833 for (i = 0; i < compnum; i++) {
834 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
835 if (!WPACKET_put_bytes_u8(pkt, comp->id)) {
836 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
842 /* Add the NULL method */
843 if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) {
844 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
849 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
850 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
853 if (!WPACKET_start_sub_packet_u16(pkt)
855 * If extensions are of zero length then we don't even add the
856 * extensions length bytes
858 || !WPACKET_set_flags(pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH)
859 || !ssl_add_clienthello_tlsext(s, pkt, &al)
860 || !WPACKET_close(pkt)) {
861 ssl3_send_alert(s, SSL3_AL_FATAL, al);
862 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
869 MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
872 unsigned int cookie_len;
875 if (!PACKET_forward(pkt, 2)
876 || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
877 al = SSL_AD_DECODE_ERROR;
878 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
882 cookie_len = PACKET_remaining(&cookiepkt);
883 if (cookie_len > sizeof(s->d1->cookie)) {
884 al = SSL_AD_ILLEGAL_PARAMETER;
885 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
889 if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
890 al = SSL_AD_DECODE_ERROR;
891 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
894 s->d1->cookie_len = cookie_len;
896 return MSG_PROCESS_FINISHED_READING;
898 ssl3_send_alert(s, SSL3_AL_FATAL, al);
899 ossl_statem_set_error(s);
900 return MSG_PROCESS_ERROR;
903 MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
905 STACK_OF(SSL_CIPHER) *sk;
908 size_t session_id_len;
909 const unsigned char *cipherchars;
910 int i, al = SSL_AD_INTERNAL_ERROR;
911 unsigned int compression;
912 unsigned int sversion;
914 #ifndef OPENSSL_NO_COMP
918 if (!PACKET_get_net_2(pkt, &sversion)) {
919 al = SSL_AD_DECODE_ERROR;
920 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
924 protverr = ssl_choose_client_version(s, sversion);
926 al = SSL_AD_PROTOCOL_VERSION;
927 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
931 /* load the server hello data */
932 /* load the server random */
933 if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
934 al = SSL_AD_DECODE_ERROR;
935 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
941 /* Get the session-id. */
942 if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
943 al = SSL_AD_DECODE_ERROR;
944 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
947 session_id_len = PACKET_remaining(&session_id);
948 if (session_id_len > sizeof s->session->session_id
949 || session_id_len > SSL3_SESSION_ID_SIZE) {
950 al = SSL_AD_ILLEGAL_PARAMETER;
951 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
955 if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
956 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
957 al = SSL_AD_DECODE_ERROR;
962 * Check if we can resume the session based on external pre-shared secret.
963 * EAP-FAST (RFC 4851) supports two types of session resumption.
964 * Resumption based on server-side state works with session IDs.
965 * Resumption based on pre-shared Protected Access Credentials (PACs)
966 * works by overriding the SessionTicket extension at the application
967 * layer, and does not send a session ID. (We do not know whether EAP-FAST
968 * servers would honour the session ID.) Therefore, the session ID alone
969 * is not a reliable indicator of session resumption, so we first check if
970 * we can resume, and later peek at the next handshake message to see if the
971 * server wants to resume.
973 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
974 s->session->tlsext_tick) {
975 const SSL_CIPHER *pref_cipher = NULL;
976 s->session->master_key_length = sizeof(s->session->master_key);
977 if (s->tls_session_secret_cb(s, s->session->master_key,
978 &s->session->master_key_length,
980 s->tls_session_secret_cb_arg)) {
981 s->session->cipher = pref_cipher ?
982 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
984 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
985 al = SSL_AD_INTERNAL_ERROR;
990 if (session_id_len != 0 && session_id_len == s->session->session_id_length
991 && memcmp(PACKET_data(&session_id), s->session->session_id,
992 session_id_len) == 0) {
993 if (s->sid_ctx_length != s->session->sid_ctx_length
994 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
995 /* actually a client application bug */
996 al = SSL_AD_ILLEGAL_PARAMETER;
997 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
998 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1004 * If we were trying for session-id reuse but the server
1005 * didn't echo the ID, make a new SSL_SESSION.
1006 * In the case of EAP-FAST and PAC, we do not send a session ID,
1007 * so the PAC-based session secret is always preserved. It'll be
1008 * overwritten if the server refuses resumption.
1010 if (s->session->session_id_length > 0) {
1011 s->ctx->stats.sess_miss++;
1012 if (!ssl_get_new_session(s, 0)) {
1017 s->session->ssl_version = s->version;
1018 s->session->session_id_length = session_id_len;
1019 /* session_id_len could be 0 */
1020 memcpy(s->session->session_id, PACKET_data(&session_id),
1024 /* Session version and negotiated protocol version should match */
1025 if (s->version != s->session->ssl_version) {
1026 al = SSL_AD_PROTOCOL_VERSION;
1028 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1029 SSL_R_SSL_SESSION_VERSION_MISMATCH);
1033 c = ssl_get_cipher_by_char(s, cipherchars);
1035 /* unknown cipher */
1036 al = SSL_AD_ILLEGAL_PARAMETER;
1037 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1041 * Now that we know the version, update the check to see if it's an allowed
1044 s->s3->tmp.min_ver = s->version;
1045 s->s3->tmp.max_ver = s->version;
1047 * If it is a disabled cipher we either didn't send it in client hello,
1048 * or it's not allowed for the selected protocol. So we return an error.
1050 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1051 al = SSL_AD_ILLEGAL_PARAMETER;
1052 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1056 sk = ssl_get_ciphers_by_id(s);
1057 i = sk_SSL_CIPHER_find(sk, c);
1059 /* we did not say we would use this cipher */
1060 al = SSL_AD_ILLEGAL_PARAMETER;
1061 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1066 * Depending on the session caching (internal/external), the cipher
1067 * and/or cipher_id values may not be set. Make sure that cipher_id is
1068 * set and use it for comparison.
1070 if (s->session->cipher)
1071 s->session->cipher_id = s->session->cipher->id;
1072 if (s->hit && (s->session->cipher_id != c->id)) {
1073 al = SSL_AD_ILLEGAL_PARAMETER;
1074 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1075 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1078 s->s3->tmp.new_cipher = c;
1079 /* lets get the compression algorithm */
1081 if (!PACKET_get_1(pkt, &compression)) {
1082 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1083 al = SSL_AD_DECODE_ERROR;
1086 #ifdef OPENSSL_NO_COMP
1087 if (compression != 0) {
1088 al = SSL_AD_ILLEGAL_PARAMETER;
1089 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1090 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1094 * If compression is disabled we'd better not try to resume a session
1095 * using compression.
1097 if (s->session->compress_meth != 0) {
1098 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1102 if (s->hit && compression != s->session->compress_meth) {
1103 al = SSL_AD_ILLEGAL_PARAMETER;
1104 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1105 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1108 if (compression == 0)
1110 else if (!ssl_allow_compression(s)) {
1111 al = SSL_AD_ILLEGAL_PARAMETER;
1112 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1115 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1118 if (compression != 0 && comp == NULL) {
1119 al = SSL_AD_ILLEGAL_PARAMETER;
1120 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1121 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1124 s->s3->tmp.new_compression = comp;
1128 /* TLS extensions */
1129 if (!ssl_parse_serverhello_tlsext(s, pkt)) {
1130 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1134 if (PACKET_remaining(pkt) != 0) {
1135 /* wrong packet length */
1136 al = SSL_AD_DECODE_ERROR;
1137 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1140 #ifndef OPENSSL_NO_SCTP
1141 if (SSL_IS_DTLS(s) && s->hit) {
1142 unsigned char sctpauthkey[64];
1143 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
1146 * Add new shared key for SCTP-Auth, will be ignored if
1149 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
1150 sizeof(DTLS1_SCTP_AUTH_LABEL));
1152 if (SSL_export_keying_material(s, sctpauthkey,
1153 sizeof(sctpauthkey),
1155 sizeof(labelbuffer), NULL, 0, 0) <= 0)
1158 BIO_ctrl(SSL_get_wbio(s),
1159 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
1160 sizeof(sctpauthkey), sctpauthkey);
1164 return MSG_PROCESS_CONTINUE_READING;
1166 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1168 ossl_statem_set_error(s);
1169 return MSG_PROCESS_ERROR;
1172 MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
1174 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
1175 unsigned long cert_list_len, cert_len;
1177 const unsigned char *certstart, *certbytes;
1178 STACK_OF(X509) *sk = NULL;
1179 EVP_PKEY *pkey = NULL;
1181 if ((sk = sk_X509_new_null()) == NULL) {
1182 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1186 if (!PACKET_get_net_3(pkt, &cert_list_len)
1187 || PACKET_remaining(pkt) != cert_list_len) {
1188 al = SSL_AD_DECODE_ERROR;
1189 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1192 while (PACKET_remaining(pkt)) {
1193 if (!PACKET_get_net_3(pkt, &cert_len)
1194 || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
1195 al = SSL_AD_DECODE_ERROR;
1196 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1197 SSL_R_CERT_LENGTH_MISMATCH);
1201 certstart = certbytes;
1202 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1204 al = SSL_AD_BAD_CERTIFICATE;
1205 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1208 if (certbytes != (certstart + cert_len)) {
1209 al = SSL_AD_DECODE_ERROR;
1210 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1211 SSL_R_CERT_LENGTH_MISMATCH);
1214 if (!sk_X509_push(sk, x)) {
1215 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1221 i = ssl_verify_cert_chain(s, sk);
1222 if ((s->verify_mode & SSL_VERIFY_PEER) && i <= 0) {
1223 al = ssl_verify_alarm_type(s->verify_result);
1224 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1225 SSL_R_CERTIFICATE_VERIFY_FAILED);
1228 ERR_clear_error(); /* but we keep s->verify_result */
1230 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
1231 al = SSL_AD_HANDSHAKE_FAILURE;
1235 s->session->peer_chain = sk;
1237 * Inconsistency alert: cert_chain does include the peer's certificate,
1238 * which we don't include in statem_srvr.c
1240 x = sk_X509_value(sk, 0);
1243 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1246 pkey = X509_get0_pubkey(x);
1248 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1251 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1252 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1256 i = ssl_cert_type(x, pkey);
1260 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1261 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1265 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1266 if (exp_idx >= 0 && i != exp_idx
1267 && (exp_idx != SSL_PKEY_GOST_EC ||
1268 (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
1269 && i != SSL_PKEY_GOST01))) {
1271 al = SSL_AD_ILLEGAL_PARAMETER;
1272 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1273 SSL_R_WRONG_CERTIFICATE_TYPE);
1276 s->session->peer_type = i;
1278 X509_free(s->session->peer);
1280 s->session->peer = x;
1281 s->session->verify_result = s->verify_result;
1284 ret = MSG_PROCESS_CONTINUE_READING;
1288 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1290 ossl_statem_set_error(s);
1293 sk_X509_pop_free(sk, X509_free);
1297 static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al)
1299 #ifndef OPENSSL_NO_PSK
1300 PACKET psk_identity_hint;
1302 /* PSK ciphersuites are preceded by an identity hint */
1304 if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
1305 *al = SSL_AD_DECODE_ERROR;
1306 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH);
1311 * Store PSK identity hint for later use, hint is used in
1312 * tls_construct_client_key_exchange. Assume that the maximum length of
1313 * a PSK identity hint can be as long as the maximum length of a PSK
1316 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1317 *al = SSL_AD_HANDSHAKE_FAILURE;
1318 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG);
1322 if (PACKET_remaining(&psk_identity_hint) == 0) {
1323 OPENSSL_free(s->session->psk_identity_hint);
1324 s->session->psk_identity_hint = NULL;
1325 } else if (!PACKET_strndup(&psk_identity_hint,
1326 &s->session->psk_identity_hint)) {
1327 *al = SSL_AD_INTERNAL_ERROR;
1333 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
1334 *al = SSL_AD_INTERNAL_ERROR;
1339 static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1341 #ifndef OPENSSL_NO_SRP
1342 PACKET prime, generator, salt, server_pub;
1344 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1345 || !PACKET_get_length_prefixed_2(pkt, &generator)
1346 || !PACKET_get_length_prefixed_1(pkt, &salt)
1347 || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
1348 *al = SSL_AD_DECODE_ERROR;
1349 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH);
1354 BN_bin2bn(PACKET_data(&prime),
1355 PACKET_remaining(&prime), NULL)) == NULL
1357 BN_bin2bn(PACKET_data(&generator),
1358 PACKET_remaining(&generator), NULL)) == NULL
1360 BN_bin2bn(PACKET_data(&salt),
1361 PACKET_remaining(&salt), NULL)) == NULL
1363 BN_bin2bn(PACKET_data(&server_pub),
1364 PACKET_remaining(&server_pub), NULL)) == NULL) {
1365 *al = SSL_AD_INTERNAL_ERROR;
1366 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
1370 if (!srp_verify_server_param(s, al)) {
1371 *al = SSL_AD_DECODE_ERROR;
1372 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
1376 /* We must check if there is a certificate */
1377 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1378 *pkey = X509_get0_pubkey(s->session->peer);
1382 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
1383 *al = SSL_AD_INTERNAL_ERROR;
1388 static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1390 #ifndef OPENSSL_NO_DH
1391 PACKET prime, generator, pub_key;
1392 EVP_PKEY *peer_tmp = NULL;
1395 BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
1397 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1398 || !PACKET_get_length_prefixed_2(pkt, &generator)
1399 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1400 *al = SSL_AD_DECODE_ERROR;
1401 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
1405 peer_tmp = EVP_PKEY_new();
1408 if (peer_tmp == NULL || dh == NULL) {
1409 *al = SSL_AD_INTERNAL_ERROR;
1410 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
1414 p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
1415 g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), NULL);
1416 bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
1418 if (p == NULL || g == NULL || bnpub_key == NULL) {
1419 *al = SSL_AD_INTERNAL_ERROR;
1420 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1424 if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) {
1425 *al = SSL_AD_DECODE_ERROR;
1426 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
1430 if (!DH_set0_pqg(dh, p, NULL, g)) {
1431 *al = SSL_AD_INTERNAL_ERROR;
1432 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1437 if (!DH_set0_key(dh, bnpub_key, NULL)) {
1438 *al = SSL_AD_INTERNAL_ERROR;
1439 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1444 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1445 *al = SSL_AD_HANDSHAKE_FAILURE;
1446 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
1450 if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
1451 *al = SSL_AD_INTERNAL_ERROR;
1452 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
1456 s->s3->peer_tmp = peer_tmp;
1459 * FIXME: This makes assumptions about which ciphersuites come with
1460 * public keys. We should have a less ad-hoc way of doing this
1462 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1463 *pkey = X509_get0_pubkey(s->session->peer);
1464 /* else anonymous DH, so no certificate or pkey. */
1473 EVP_PKEY_free(peer_tmp);
1477 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
1478 *al = SSL_AD_INTERNAL_ERROR;
1483 static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1485 #ifndef OPENSSL_NO_EC
1487 const unsigned char *ecparams;
1489 unsigned int curve_flags;
1490 EVP_PKEY_CTX *pctx = NULL;
1493 * Extract elliptic curve parameters and the server's ephemeral ECDH
1494 * public key. For now we only support named (not generic) curves and
1495 * ECParameters in this case is just three bytes.
1497 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1498 *al = SSL_AD_DECODE_ERROR;
1499 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
1503 * Check curve is one of our preferences, if not server has sent an
1504 * invalid curve. ECParameters is 3 bytes.
1506 if (!tls1_check_curve(s, ecparams, 3)) {
1507 *al = SSL_AD_DECODE_ERROR;
1508 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
1512 curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
1514 if (curve_nid == 0) {
1515 *al = SSL_AD_INTERNAL_ERROR;
1516 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
1517 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1521 if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
1522 EVP_PKEY *key = EVP_PKEY_new();
1524 if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
1525 *al = SSL_AD_INTERNAL_ERROR;
1526 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1530 s->s3->peer_tmp = key;
1532 /* Set up EVP_PKEY with named curve as parameters */
1533 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
1535 || EVP_PKEY_paramgen_init(pctx) <= 0
1536 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
1537 || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
1538 *al = SSL_AD_INTERNAL_ERROR;
1539 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1540 EVP_PKEY_CTX_free(pctx);
1543 EVP_PKEY_CTX_free(pctx);
1547 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1548 *al = SSL_AD_DECODE_ERROR;
1549 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
1553 if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
1554 PACKET_data(&encoded_pt),
1555 PACKET_remaining(&encoded_pt))) {
1556 *al = SSL_AD_DECODE_ERROR;
1557 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
1562 * The ECC/TLS specification does not mention the use of DSA to sign
1563 * ECParameters in the server key exchange message. We do support RSA
1566 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
1567 *pkey = X509_get0_pubkey(s->session->peer);
1568 else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
1569 *pkey = X509_get0_pubkey(s->session->peer);
1570 /* else anonymous ECDH, so no certificate or pkey. */
1574 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
1575 *al = SSL_AD_INTERNAL_ERROR;
1580 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1584 EVP_PKEY *pkey = NULL;
1585 PACKET save_param_start, signature;
1587 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1589 save_param_start = *pkt;
1591 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1592 EVP_PKEY_free(s->s3->peer_tmp);
1593 s->s3->peer_tmp = NULL;
1596 if (alg_k & SSL_PSK) {
1597 if (!tls_process_ske_psk_preamble(s, pkt, &al))
1601 /* Nothing else to do for plain PSK or RSAPSK */
1602 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1603 } else if (alg_k & SSL_kSRP) {
1604 if (!tls_process_ske_srp(s, pkt, &pkey, &al))
1606 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1607 if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
1609 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1610 if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
1613 al = SSL_AD_UNEXPECTED_MESSAGE;
1614 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1618 /* if it was signed, check the signature */
1622 const EVP_MD *md = NULL;
1626 * |pkt| now points to the beginning of the signature, so the difference
1627 * equals the length of the parameters.
1629 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1630 PACKET_remaining(&save_param_start) -
1631 PACKET_remaining(pkt))) {
1632 al = SSL_AD_INTERNAL_ERROR;
1633 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1637 if (SSL_USE_SIGALGS(s)) {
1638 const unsigned char *sigalgs;
1640 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1641 al = SSL_AD_DECODE_ERROR;
1642 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1645 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1647 al = SSL_AD_INTERNAL_ERROR;
1649 } else if (rv == 0) {
1650 al = SSL_AD_DECODE_ERROR;
1654 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1656 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
1657 md = EVP_md5_sha1();
1662 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1663 || PACKET_remaining(pkt) != 0) {
1664 al = SSL_AD_DECODE_ERROR;
1665 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1668 maxsig = EVP_PKEY_size(pkey);
1670 al = SSL_AD_INTERNAL_ERROR;
1671 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1676 * Check signature length
1678 if (PACKET_remaining(&signature) > (size_t)maxsig) {
1679 /* wrong packet length */
1680 al = SSL_AD_DECODE_ERROR;
1681 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1682 SSL_R_WRONG_SIGNATURE_LENGTH);
1686 md_ctx = EVP_MD_CTX_new();
1687 if (md_ctx == NULL) {
1688 al = SSL_AD_INTERNAL_ERROR;
1689 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1693 if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
1694 || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
1695 SSL3_RANDOM_SIZE) <= 0
1696 || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
1697 SSL3_RANDOM_SIZE) <= 0
1698 || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
1699 PACKET_remaining(¶ms)) <= 0) {
1700 EVP_MD_CTX_free(md_ctx);
1701 al = SSL_AD_INTERNAL_ERROR;
1702 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1705 if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
1706 PACKET_remaining(&signature), pkey) <= 0) {
1708 EVP_MD_CTX_free(md_ctx);
1709 al = SSL_AD_DECRYPT_ERROR;
1710 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1713 EVP_MD_CTX_free(md_ctx);
1715 /* aNULL, aSRP or PSK do not need public keys */
1716 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
1717 && !(alg_k & SSL_PSK)) {
1718 /* Might be wrong key type, check it */
1719 if (ssl3_check_cert_and_algorithm(s)) {
1720 /* Otherwise this shouldn't happen */
1721 al = SSL_AD_INTERNAL_ERROR;
1722 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1724 al = SSL_AD_DECODE_ERROR;
1728 /* still data left over */
1729 if (PACKET_remaining(pkt) != 0) {
1730 al = SSL_AD_DECODE_ERROR;
1731 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1736 return MSG_PROCESS_CONTINUE_READING;
1739 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1740 ossl_statem_set_error(s);
1741 return MSG_PROCESS_ERROR;
1744 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
1746 int ret = MSG_PROCESS_ERROR;
1747 unsigned int list_len, ctype_num, i, name_len;
1748 X509_NAME *xn = NULL;
1749 const unsigned char *data;
1750 const unsigned char *namestart, *namebytes;
1751 STACK_OF(X509_NAME) *ca_sk = NULL;
1753 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1754 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1758 /* get the certificate types */
1759 if (!PACKET_get_1(pkt, &ctype_num)
1760 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
1761 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1762 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1765 OPENSSL_free(s->cert->ctypes);
1766 s->cert->ctypes = NULL;
1767 if (ctype_num > SSL3_CT_NUMBER) {
1768 /* If we exceed static buffer copy all to cert structure */
1769 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1770 if (s->cert->ctypes == NULL) {
1771 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1774 memcpy(s->cert->ctypes, data, ctype_num);
1775 s->cert->ctype_num = (size_t)ctype_num;
1776 ctype_num = SSL3_CT_NUMBER;
1778 for (i = 0; i < ctype_num; i++)
1779 s->s3->tmp.ctype[i] = data[i];
1781 if (SSL_USE_SIGALGS(s)) {
1782 if (!PACKET_get_net_2(pkt, &list_len)
1783 || !PACKET_get_bytes(pkt, &data, list_len)) {
1784 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1785 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1786 SSL_R_LENGTH_MISMATCH);
1790 /* Clear certificate digests and validity flags */
1791 for (i = 0; i < SSL_PKEY_NUM; i++) {
1792 s->s3->tmp.md[i] = NULL;
1793 s->s3->tmp.valid_flags[i] = 0;
1795 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1796 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1797 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1798 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1801 if (!tls1_process_sigalgs(s)) {
1802 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1803 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1807 ssl_set_default_md(s);
1810 /* get the CA RDNs */
1811 if (!PACKET_get_net_2(pkt, &list_len)
1812 || PACKET_remaining(pkt) != list_len) {
1813 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1814 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1818 while (PACKET_remaining(pkt)) {
1819 if (!PACKET_get_net_2(pkt, &name_len)
1820 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
1821 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1822 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1823 SSL_R_LENGTH_MISMATCH);
1827 namestart = namebytes;
1829 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
1830 name_len)) == NULL) {
1831 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1832 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1836 if (namebytes != (namestart + name_len)) {
1837 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1838 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1839 SSL_R_CA_DN_LENGTH_MISMATCH);
1842 if (!sk_X509_NAME_push(ca_sk, xn)) {
1843 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1849 /* we should setup a certificate to return.... */
1850 s->s3->tmp.cert_req = 1;
1851 s->s3->tmp.ctype_num = ctype_num;
1852 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1853 s->s3->tmp.ca_names = ca_sk;
1856 ret = MSG_PROCESS_CONTINUE_PROCESSING;
1859 ossl_statem_set_error(s);
1862 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1866 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
1868 return (X509_NAME_cmp(*a, *b));
1871 MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
1874 unsigned int ticklen;
1875 unsigned long ticket_lifetime_hint;
1877 if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
1878 || !PACKET_get_net_2(pkt, &ticklen)
1879 || PACKET_remaining(pkt) != ticklen) {
1880 al = SSL_AD_DECODE_ERROR;
1881 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1885 /* Server is allowed to change its mind and send an empty ticket. */
1887 return MSG_PROCESS_CONTINUE_READING;
1889 if (s->session->session_id_length > 0) {
1890 int i = s->session_ctx->session_cache_mode;
1891 SSL_SESSION *new_sess;
1893 * We reused an existing session, so we need to replace it with a new
1896 if (i & SSL_SESS_CACHE_CLIENT) {
1898 * Remove the old session from the cache. We carry on if this fails
1900 SSL_CTX_remove_session(s->session_ctx, s->session);
1903 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1904 al = SSL_AD_INTERNAL_ERROR;
1905 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1909 SSL_SESSION_free(s->session);
1910 s->session = new_sess;
1913 OPENSSL_free(s->session->tlsext_tick);
1914 s->session->tlsext_ticklen = 0;
1916 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1917 if (s->session->tlsext_tick == NULL) {
1918 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1921 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
1922 al = SSL_AD_DECODE_ERROR;
1923 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1927 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
1928 s->session->tlsext_ticklen = ticklen;
1930 * There are two ways to detect a resumed ticket session. One is to set
1931 * an appropriate session ID and then the server must return a match in
1932 * ServerHello. This allows the normal client session ID matching to work
1933 * and we know much earlier that the ticket has been accepted. The
1934 * other way is to set zero length session ID when the ticket is
1935 * presented and rely on the handshake to determine session resumption.
1936 * We choose the former approach because this fits in with assumptions
1937 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1938 * SHA256 is disabled) hash of the ticket.
1940 if (!EVP_Digest(s->session->tlsext_tick, ticklen,
1941 s->session->session_id, &s->session->session_id_length,
1942 EVP_sha256(), NULL)) {
1943 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
1946 return MSG_PROCESS_CONTINUE_READING;
1948 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1950 ossl_statem_set_error(s);
1951 return MSG_PROCESS_ERROR;
1954 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
1957 unsigned long resplen;
1960 if (!PACKET_get_1(pkt, &type)
1961 || type != TLSEXT_STATUSTYPE_ocsp) {
1962 al = SSL_AD_DECODE_ERROR;
1963 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1966 if (!PACKET_get_net_3(pkt, &resplen)
1967 || PACKET_remaining(pkt) != resplen) {
1968 al = SSL_AD_DECODE_ERROR;
1969 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1972 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
1973 if (s->tlsext_ocsp_resp == NULL) {
1974 al = SSL_AD_INTERNAL_ERROR;
1975 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1978 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
1979 al = SSL_AD_DECODE_ERROR;
1980 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1983 s->tlsext_ocsp_resplen = resplen;
1984 return MSG_PROCESS_CONTINUE_READING;
1986 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1987 ossl_statem_set_error(s);
1988 return MSG_PROCESS_ERROR;
1991 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
1993 if (PACKET_remaining(pkt) > 0) {
1994 /* should contain no data */
1995 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1996 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
1997 ossl_statem_set_error(s);
1998 return MSG_PROCESS_ERROR;
2000 #ifndef OPENSSL_NO_SRP
2001 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2002 if (SRP_Calc_A_param(s) <= 0) {
2003 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2004 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2005 ossl_statem_set_error(s);
2006 return MSG_PROCESS_ERROR;
2012 * at this point we check that we have the required stuff from
2015 if (!ssl3_check_cert_and_algorithm(s)) {
2016 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2017 ossl_statem_set_error(s);
2018 return MSG_PROCESS_ERROR;
2022 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2023 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2024 * message, or NULL and -1 otherwise
2026 if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
2028 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2030 ssl3_send_alert(s, SSL3_AL_FATAL,
2031 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
2032 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
2033 SSL_R_INVALID_STATUS_RESPONSE);
2034 return MSG_PROCESS_ERROR;
2037 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2038 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
2039 return MSG_PROCESS_ERROR;
2042 #ifndef OPENSSL_NO_CT
2043 if (s->ct_validation_callback != NULL) {
2044 /* Note we validate the SCTs whether or not we abort on error */
2045 if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
2046 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2047 return MSG_PROCESS_ERROR;
2052 #ifndef OPENSSL_NO_SCTP
2053 /* Only applies to renegotiation */
2054 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2055 && s->renegotiate != 0)
2056 return MSG_PROCESS_CONTINUE_PROCESSING;
2059 return MSG_PROCESS_FINISHED_READING;
2062 static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al)
2064 #ifndef OPENSSL_NO_PSK
2067 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2068 * \0-terminated identity. The last byte is for us for simulating
2071 char identity[PSK_MAX_IDENTITY_LEN + 1];
2072 size_t identitylen = 0;
2073 unsigned char psk[PSK_MAX_PSK_LEN];
2074 unsigned char *tmppsk = NULL;
2075 char *tmpidentity = NULL;
2078 if (s->psk_client_callback == NULL) {
2079 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
2080 *al = SSL_AD_INTERNAL_ERROR;
2084 memset(identity, 0, sizeof(identity));
2086 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2087 identity, sizeof(identity) - 1,
2090 if (psklen > PSK_MAX_PSK_LEN) {
2091 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2092 *al = SSL_AD_HANDSHAKE_FAILURE;
2094 } else if (psklen == 0) {
2095 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
2096 SSL_R_PSK_IDENTITY_NOT_FOUND);
2097 *al = SSL_AD_HANDSHAKE_FAILURE;
2101 identitylen = strlen(identity);
2102 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2103 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2104 *al = SSL_AD_HANDSHAKE_FAILURE;
2108 tmppsk = OPENSSL_memdup(psk, psklen);
2109 tmpidentity = OPENSSL_strdup(identity);
2110 if (tmppsk == NULL || tmpidentity == NULL) {
2111 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
2112 *al = SSL_AD_INTERNAL_ERROR;
2116 OPENSSL_free(s->s3->tmp.psk);
2117 s->s3->tmp.psk = tmppsk;
2118 s->s3->tmp.psklen = psklen;
2120 OPENSSL_free(s->session->psk_identity);
2121 s->session->psk_identity = tmpidentity;
2124 if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) {
2125 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2126 *al = SSL_AD_INTERNAL_ERROR;
2133 OPENSSL_cleanse(psk, psklen);
2134 OPENSSL_cleanse(identity, sizeof(identity));
2135 OPENSSL_clear_free(tmppsk, psklen);
2136 OPENSSL_clear_free(tmpidentity, identitylen);
2140 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2141 *al = SSL_AD_INTERNAL_ERROR;
2146 static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al)
2148 #ifndef OPENSSL_NO_RSA
2149 unsigned char *encdata = NULL;
2150 EVP_PKEY *pkey = NULL;
2151 EVP_PKEY_CTX *pctx = NULL;
2153 unsigned char *pms = NULL;
2156 if (s->session->peer == NULL) {
2158 * We should always have a server certificate with SSL_kRSA.
2160 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2164 pkey = X509_get0_pubkey(s->session->peer);
2165 if (EVP_PKEY_get0_RSA(pkey) == NULL) {
2166 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2170 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2171 pms = OPENSSL_malloc(pmslen);
2173 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
2174 *al = SSL_AD_INTERNAL_ERROR;
2178 pms[0] = s->client_version >> 8;
2179 pms[1] = s->client_version & 0xff;
2180 if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
2184 /* Fix buf for TLS and beyond */
2185 if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) {
2186 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2189 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2190 if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
2191 || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
2192 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
2195 if (!WPACKET_allocate_bytes(pkt, enclen, &encdata)
2196 || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) {
2197 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
2200 EVP_PKEY_CTX_free(pctx);
2203 if (s->options & SSL_OP_PKCS1_CHECK_1)
2205 if (s->options & SSL_OP_PKCS1_CHECK_2)
2209 /* Fix buf for TLS and beyond */
2210 if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) {
2211 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2215 s->s3->tmp.pms = pms;
2216 s->s3->tmp.pmslen = pmslen;
2220 OPENSSL_clear_free(pms, pmslen);
2221 EVP_PKEY_CTX_free(pctx);
2225 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2226 *al = SSL_AD_INTERNAL_ERROR;
2231 static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al)
2233 #ifndef OPENSSL_NO_DH
2235 const BIGNUM *pub_key;
2236 EVP_PKEY *ckey = NULL, *skey = NULL;
2237 unsigned char *keybytes = NULL;
2239 skey = s->s3->peer_tmp;
2243 ckey = ssl_generate_pkey(skey);
2244 dh_clnt = EVP_PKEY_get0_DH(ckey);
2246 if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0)
2249 /* send off the data */
2250 DH_get0_key(dh_clnt, &pub_key, NULL);
2251 if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes))
2254 BN_bn2bin(pub_key, keybytes);
2255 EVP_PKEY_free(ckey);
2259 EVP_PKEY_free(ckey);
2261 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2262 *al = SSL_AD_INTERNAL_ERROR;
2266 static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al)
2268 #ifndef OPENSSL_NO_EC
2269 unsigned char *encodedPoint = NULL;
2270 int encoded_pt_len = 0;
2271 EVP_PKEY *ckey = NULL, *skey = NULL;
2274 skey = s->s3->peer_tmp;
2276 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2280 ckey = ssl_generate_pkey(skey);
2282 if (ssl_derive(s, ckey, skey) == 0) {
2283 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
2287 /* Generate encoding of client key */
2288 encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
2290 if (encoded_pt_len == 0) {
2291 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
2295 if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) {
2296 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2302 OPENSSL_free(encodedPoint);
2303 EVP_PKEY_free(ckey);
2306 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2307 *al = SSL_AD_INTERNAL_ERROR;
2312 static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al)
2314 #ifndef OPENSSL_NO_GOST
2315 /* GOST key exchange message creation */
2316 EVP_PKEY_CTX *pkey_ctx = NULL;
2319 unsigned int md_len;
2320 unsigned char shared_ukm[32], tmp[256];
2321 EVP_MD_CTX *ukm_hash = NULL;
2322 int dgst_nid = NID_id_GostR3411_94;
2323 unsigned char *pms = NULL;
2326 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2327 dgst_nid = NID_id_GostR3411_2012_256;
2330 * Get server sertificate PKEY and create ctx from it
2332 peer_cert = s->session->peer;
2334 *al = SSL_AD_HANDSHAKE_FAILURE;
2335 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
2336 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2340 pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
2341 if (pkey_ctx == NULL) {
2342 *al = SSL_AD_INTERNAL_ERROR;
2343 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2347 * If we have send a certificate, and certificate key
2348 * parameters match those of server certificate, use
2349 * certificate key for key exchange
2352 /* Otherwise, generate ephemeral key pair */
2354 pms = OPENSSL_malloc(pmslen);
2356 *al = SSL_AD_INTERNAL_ERROR;
2357 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2361 if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2362 /* Generate session key */
2363 || RAND_bytes(pms, pmslen) <= 0) {
2364 *al = SSL_AD_INTERNAL_ERROR;
2365 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2369 * Compute shared IV and store it in algorithm-specific context
2372 ukm_hash = EVP_MD_CTX_new();
2373 if (ukm_hash == NULL
2374 || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0
2375 || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2376 SSL3_RANDOM_SIZE) <= 0
2377 || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2378 SSL3_RANDOM_SIZE) <= 0
2379 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
2380 *al = SSL_AD_INTERNAL_ERROR;
2381 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2384 EVP_MD_CTX_free(ukm_hash);
2386 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
2387 EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
2388 *al = SSL_AD_INTERNAL_ERROR;
2389 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2392 /* Make GOST keytransport blob message */
2394 * Encapsulate it into sequence
2397 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
2398 *al = SSL_AD_INTERNAL_ERROR;
2399 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2403 if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)
2404 || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81))
2405 || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) {
2406 *al = SSL_AD_INTERNAL_ERROR;
2407 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2411 EVP_PKEY_CTX_free(pkey_ctx);
2412 s->s3->tmp.pms = pms;
2413 s->s3->tmp.pmslen = pmslen;
2417 EVP_PKEY_CTX_free(pkey_ctx);
2418 OPENSSL_clear_free(pms, pmslen);
2419 EVP_MD_CTX_free(ukm_hash);
2422 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2423 *al = SSL_AD_INTERNAL_ERROR;
2428 static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al)
2430 #ifndef OPENSSL_NO_SRP
2431 unsigned char *abytes = NULL;
2433 if (s->srp_ctx.A == NULL
2434 || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A),
2436 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2439 BN_bn2bin(s->srp_ctx.A, abytes);
2441 OPENSSL_free(s->session->srp_username);
2442 s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
2443 if (s->session->srp_username == NULL) {
2444 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE);
2450 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2451 *al = SSL_AD_INTERNAL_ERROR;
2456 int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt)
2458 unsigned long alg_k;
2461 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2463 if ((alg_k & SSL_PSK)
2464 && !tls_construct_cke_psk_preamble(s, pkt, &al))
2467 if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2468 if (!tls_construct_cke_rsa(s, pkt, &al))
2470 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
2471 if (!tls_construct_cke_dhe(s, pkt, &al))
2473 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
2474 if (!tls_construct_cke_ecdhe(s, pkt, &al))
2476 } else if (alg_k & SSL_kGOST) {
2477 if (!tls_construct_cke_gost(s, pkt, &al))
2479 } else if (alg_k & SSL_kSRP) {
2480 if (!tls_construct_cke_srp(s, pkt, &al))
2482 } else if (!(alg_k & SSL_kPSK)) {
2483 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2484 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2491 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2492 OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
2493 s->s3->tmp.pms = NULL;
2494 #ifndef OPENSSL_NO_PSK
2495 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2496 s->s3->tmp.psk = NULL;
2501 int tls_client_key_exchange_post_work(SSL *s)
2503 unsigned char *pms = NULL;
2506 pms = s->s3->tmp.pms;
2507 pmslen = s->s3->tmp.pmslen;
2509 #ifndef OPENSSL_NO_SRP
2511 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2512 if (!srp_generate_client_master_secret(s)) {
2513 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2514 ERR_R_INTERNAL_ERROR);
2521 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2522 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2523 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2526 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2527 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2528 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2529 /* ssl_generate_master_secret frees the pms even on error */
2537 #ifndef OPENSSL_NO_SCTP
2538 if (SSL_IS_DTLS(s)) {
2539 unsigned char sctpauthkey[64];
2540 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2543 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2546 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
2547 sizeof(DTLS1_SCTP_AUTH_LABEL));
2549 if (SSL_export_keying_material(s, sctpauthkey,
2550 sizeof(sctpauthkey), labelbuffer,
2551 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2554 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2555 sizeof(sctpauthkey), sctpauthkey);
2561 OPENSSL_clear_free(pms, pmslen);
2562 s->s3->tmp.pms = NULL;
2566 int tls_construct_client_verify(SSL *s, WPACKET *pkt)
2569 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2570 EVP_MD_CTX *mctx = NULL;
2574 unsigned char *sig = NULL;
2576 mctx = EVP_MD_CTX_new();
2578 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2581 pkey = s->cert->key->privatekey;
2583 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2584 if (hdatalen <= 0) {
2585 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2588 if (SSL_USE_SIGALGS(s)&& !tls12_get_sigandhash(pkt, pkey, md)) {
2589 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2593 fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
2595 sig = OPENSSL_malloc(EVP_PKEY_size(pkey));
2597 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2600 if (!EVP_SignInit_ex(mctx, md, NULL)
2601 || !EVP_SignUpdate(mctx, hdata, hdatalen)
2602 || (s->version == SSL3_VERSION
2603 && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
2604 s->session->master_key_length,
2605 s->session->master_key))
2606 || !EVP_SignFinal(mctx, sig, &u, pkey)) {
2607 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
2610 #ifndef OPENSSL_NO_GOST
2612 int pktype = EVP_PKEY_id(pkey);
2613 if (pktype == NID_id_GostR3410_2001
2614 || pktype == NID_id_GostR3410_2012_256
2615 || pktype == NID_id_GostR3410_2012_512)
2616 BUF_reverse(sig, NULL, u);
2620 if (!WPACKET_sub_memcpy_u16(pkt, sig, u)) {
2621 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2625 /* Digest cached records and discard handshake buffer */
2626 if (!ssl3_digest_cached_records(s, 0))
2630 EVP_MD_CTX_free(mctx);
2634 EVP_MD_CTX_free(mctx);
2635 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2640 * Check a certificate can be used for client authentication. Currently check
2641 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2642 * certificates can be used and optionally checks suitability for Suite B.
2644 static int ssl3_check_client_certificate(SSL *s)
2646 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
2648 /* If no suitable signature algorithm can't use certificate */
2649 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
2652 * If strict mode check suitability of chain before using it. This also
2653 * adjusts suite B digest if necessary.
2655 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
2656 !tls1_check_chain(s, NULL, NULL, NULL, -2))
2661 WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
2664 EVP_PKEY *pkey = NULL;
2667 if (wst == WORK_MORE_A) {
2668 /* Let cert callback update client certificates if required */
2669 if (s->cert->cert_cb) {
2670 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
2672 s->rwstate = SSL_X509_LOOKUP;
2676 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2677 ossl_statem_set_error(s);
2680 s->rwstate = SSL_NOTHING;
2682 if (ssl3_check_client_certificate(s))
2683 return WORK_FINISHED_CONTINUE;
2685 /* Fall through to WORK_MORE_B */
2689 /* We need to get a client cert */
2690 if (wst == WORK_MORE_B) {
2692 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2693 * return(-1); We then get retied later
2695 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2697 s->rwstate = SSL_X509_LOOKUP;
2700 s->rwstate = SSL_NOTHING;
2701 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2702 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2704 } else if (i == 1) {
2706 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
2707 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2711 EVP_PKEY_free(pkey);
2712 if (i && !ssl3_check_client_certificate(s))
2715 if (s->version == SSL3_VERSION) {
2716 s->s3->tmp.cert_req = 0;
2717 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2718 return WORK_FINISHED_CONTINUE;
2720 s->s3->tmp.cert_req = 2;
2721 if (!ssl3_digest_cached_records(s, 0)) {
2722 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2723 ossl_statem_set_error(s);
2729 return WORK_FINISHED_CONTINUE;
2732 /* Shouldn't ever get here */
2736 int tls_construct_client_certificate(SSL *s, WPACKET *pkt)
2738 if (!ssl3_output_cert_chain(s, pkt,
2739 (s->s3->tmp.cert_req == 2) ? NULL
2741 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
2742 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2749 #define has_bits(i,m) (((i)&(m)) == (m))
2751 int ssl3_check_cert_and_algorithm(SSL *s)
2754 #ifndef OPENSSL_NO_EC
2758 EVP_PKEY *pkey = NULL;
2759 int al = SSL_AD_HANDSHAKE_FAILURE;
2761 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2762 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2764 /* we don't have a certificate */
2765 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
2768 /* This is the passed certificate */
2770 #ifndef OPENSSL_NO_EC
2771 idx = s->session->peer_type;
2772 if (idx == SSL_PKEY_ECC) {
2773 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
2775 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2780 } else if (alg_a & SSL_aECDSA) {
2781 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2782 SSL_R_MISSING_ECDSA_SIGNING_CERT);
2786 pkey = X509_get0_pubkey(s->session->peer);
2787 i = X509_certificate_type(s->session->peer, pkey);
2789 /* Check that we have a certificate if we require one */
2790 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2791 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2792 SSL_R_MISSING_RSA_SIGNING_CERT);
2795 #ifndef OPENSSL_NO_DSA
2796 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2797 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2798 SSL_R_MISSING_DSA_SIGNING_CERT);
2802 #ifndef OPENSSL_NO_RSA
2803 if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
2804 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2805 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2806 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2810 #ifndef OPENSSL_NO_DH
2811 if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
2812 al = SSL_AD_INTERNAL_ERROR;
2813 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
2820 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2824 #ifndef OPENSSL_NO_NEXTPROTONEG
2825 int tls_construct_next_proto(SSL *s, WPACKET *pkt)
2827 size_t len, padding_len;
2828 unsigned char *padding = NULL;
2830 len = s->next_proto_negotiated_len;
2831 padding_len = 32 - ((len + 2) % 32);
2833 if (!WPACKET_sub_memcpy_u8(pkt, s->next_proto_negotiated, len)
2834 || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) {
2835 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2839 memset(padding, 0, padding_len);
2843 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2848 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2851 #ifndef OPENSSL_NO_ENGINE
2852 if (s->ctx->client_cert_engine) {
2853 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2854 SSL_get_client_CA_list(s),
2855 px509, ppkey, NULL, NULL, NULL);
2860 if (s->ctx->client_cert_cb)
2861 i = s->ctx->client_cert_cb(s, px509, ppkey);
2865 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt)
2868 size_t totlen = 0, len, maxlen;
2869 int empty_reneg_info_scsv = !s->renegotiate;
2870 /* Set disabled masks for this session */
2871 ssl_set_client_disabled(s);
2876 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
2877 # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6
2878 # error Max cipher length too short
2881 * Some servers hang if client hello > 256 bytes as hack workaround
2882 * chop number of supported ciphers to keep it well below this if we
2885 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2886 maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
2889 /* Maximum length that can be stored in 2 bytes. Length must be even */
2892 if (empty_reneg_info_scsv)
2894 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
2897 for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) {
2898 const SSL_CIPHER *c;
2900 c = sk_SSL_CIPHER_value(sk, i);
2901 /* Skip disabled ciphers */
2902 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
2905 if (!s->method->put_cipher_by_char(c, pkt, &len)) {
2906 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2914 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE);
2919 if (empty_reneg_info_scsv) {
2920 static SSL_CIPHER scsv = {
2921 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2923 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2924 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2928 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
2929 static SSL_CIPHER scsv = {
2930 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2932 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2933 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);