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 * Construct a message to be sent from the client to the server.
509 * Valid return values are:
513 int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt)
515 OSSL_STATEM *st = &s->statem;
517 switch (st->hand_state) {
519 /* Shouldn't happen */
522 case TLS_ST_CW_CLNT_HELLO:
523 return tls_construct_client_hello(s, pkt);
526 return tls_construct_client_certificate(s, pkt);
528 case TLS_ST_CW_KEY_EXCH:
529 return tls_construct_client_key_exchange(s, pkt);
531 case TLS_ST_CW_CERT_VRFY:
532 return tls_construct_client_verify(s, pkt);
534 case TLS_ST_CW_CHANGE:
536 return dtls_construct_change_cipher_spec(s, pkt);
538 return tls_construct_change_cipher_spec(s, pkt);
540 #if !defined(OPENSSL_NO_NEXTPROTONEG)
541 case TLS_ST_CW_NEXT_PROTO:
542 return tls_construct_next_proto(s, pkt);
544 case TLS_ST_CW_FINISHED:
545 return tls_construct_finished(s, pkt,
547 ssl3_enc->client_finished_label,
549 ssl3_enc->client_finished_label_len);
554 * Returns the maximum allowed length for the current message that we are
555 * reading. Excludes the message header.
557 unsigned long ossl_statem_client_max_message_size(SSL *s)
559 OSSL_STATEM *st = &s->statem;
561 switch (st->hand_state) {
563 /* Shouldn't happen */
566 case TLS_ST_CR_SRVR_HELLO:
567 return SERVER_HELLO_MAX_LENGTH;
569 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
570 return HELLO_VERIFY_REQUEST_MAX_LENGTH;
573 return s->max_cert_list;
575 case TLS_ST_CR_CERT_STATUS:
576 return SSL3_RT_MAX_PLAIN_LENGTH;
578 case TLS_ST_CR_KEY_EXCH:
579 return SERVER_KEY_EXCH_MAX_LENGTH;
581 case TLS_ST_CR_CERT_REQ:
583 * Set to s->max_cert_list for compatibility with previous releases. In
584 * practice these messages can get quite long if servers are configured
585 * to provide a long list of acceptable CAs
587 return s->max_cert_list;
589 case TLS_ST_CR_SRVR_DONE:
590 return SERVER_HELLO_DONE_MAX_LENGTH;
592 case TLS_ST_CR_CHANGE:
593 if (s->version == DTLS1_BAD_VER)
595 return CCS_MAX_LENGTH;
597 case TLS_ST_CR_SESSION_TICKET:
598 return SSL3_RT_MAX_PLAIN_LENGTH;
600 case TLS_ST_CR_FINISHED:
601 return FINISHED_MAX_LENGTH;
606 * Process a message that the client has been received from the server.
608 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
610 OSSL_STATEM *st = &s->statem;
612 switch (st->hand_state) {
614 /* Shouldn't happen */
615 return MSG_PROCESS_ERROR;
617 case TLS_ST_CR_SRVR_HELLO:
618 return tls_process_server_hello(s, pkt);
620 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
621 return dtls_process_hello_verify(s, pkt);
624 return tls_process_server_certificate(s, pkt);
626 case TLS_ST_CR_CERT_STATUS:
627 return tls_process_cert_status(s, pkt);
629 case TLS_ST_CR_KEY_EXCH:
630 return tls_process_key_exchange(s, pkt);
632 case TLS_ST_CR_CERT_REQ:
633 return tls_process_certificate_request(s, pkt);
635 case TLS_ST_CR_SRVR_DONE:
636 return tls_process_server_done(s, pkt);
638 case TLS_ST_CR_CHANGE:
639 return tls_process_change_cipher_spec(s, pkt);
641 case TLS_ST_CR_SESSION_TICKET:
642 return tls_process_new_session_ticket(s, pkt);
644 case TLS_ST_CR_FINISHED:
645 return tls_process_finished(s, pkt);
650 * Perform any further processing required following the receipt of a message
653 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
655 OSSL_STATEM *st = &s->statem;
657 switch (st->hand_state) {
659 /* Shouldn't happen */
662 case TLS_ST_CR_CERT_REQ:
663 return tls_prepare_client_certificate(s, wst);
665 #ifndef OPENSSL_NO_SCTP
666 case TLS_ST_CR_SRVR_DONE:
667 /* We only get here if we are using SCTP and we are renegotiating */
668 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
669 s->s3->in_read_app_data = 2;
670 s->rwstate = SSL_READING;
671 BIO_clear_retry_flags(SSL_get_rbio(s));
672 BIO_set_retry_read(SSL_get_rbio(s));
673 ossl_statem_set_sctp_read_sock(s, 1);
676 ossl_statem_set_sctp_read_sock(s, 0);
677 return WORK_FINISHED_STOP;
682 int tls_construct_client_hello(SSL *s, WPACKET *pkt)
687 int al = SSL_AD_HANDSHAKE_FAILURE;
688 #ifndef OPENSSL_NO_COMP
691 SSL_SESSION *sess = s->session;
693 if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) {
694 /* Should not happen */
695 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
699 /* Work out what SSL/TLS/DTLS version to use */
700 protverr = ssl_set_client_hello_version(s);
702 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
706 if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) ||
708 * In the case of EAP-FAST, we can have a pre-shared
709 * "ticket" without a session ID.
711 (!sess->session_id_length && !sess->tlsext_tick) ||
712 (sess->not_resumable)) {
713 if (!ssl_get_new_session(s, 0))
716 /* else use the pre-loaded session */
718 p = s->s3->client_random;
721 * for DTLS if client_random is initialized, reuse it, we are
722 * required to use same upon reply to HelloVerify
724 if (SSL_IS_DTLS(s)) {
727 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
736 if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0)
739 if (!ssl_set_handshake_header(s, pkt, SSL3_MT_CLIENT_HELLO)) {
740 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
741 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
746 * version indicates the negotiated version: for example from
747 * an SSLv2/v3 compatible client hello). The client_version
748 * field is the maximum version we permit and it is also
749 * used in RSA encrypted premaster secrets. Some servers can
750 * choke if we initially report a higher version then
751 * renegotiate to a lower one in the premaster secret. This
752 * didn't happen with TLS 1.0 as most servers supported it
753 * but it can with TLS 1.1 or later if the server only supports
756 * Possible scenario with previous logic:
757 * 1. Client hello indicates TLS 1.2
758 * 2. Server hello says TLS 1.0
759 * 3. RSA encrypted premaster secret uses 1.2.
760 * 4. Handshake proceeds using TLS 1.0.
761 * 5. Server sends hello request to renegotiate.
762 * 6. Client hello indicates TLS v1.0 as we now
763 * know that is maximum server supports.
764 * 7. Server chokes on RSA encrypted premaster secret
765 * containing version 1.0.
767 * For interoperability it should be OK to always use the
768 * maximum version we support in client hello and then rely
769 * on the checking of version to ensure the servers isn't
770 * being inconsistent: for example initially negotiating with
771 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
772 * client_version in client hello and not resetting it to
773 * the negotiated version.
775 if (!WPACKET_put_bytes_u16(pkt, s->client_version)
776 || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) {
777 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
785 i = s->session->session_id_length;
786 if (i > (int)sizeof(s->session->session_id)
787 || !WPACKET_start_sub_packet_u8(pkt)
788 || (i != 0 && !WPACKET_memcpy(pkt, s->session->session_id, i))
789 || !WPACKET_close(pkt)) {
790 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
794 /* cookie stuff for DTLS */
795 if (SSL_IS_DTLS(s)) {
796 if (s->d1->cookie_len > sizeof(s->d1->cookie)
797 || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie,
798 s->d1->cookie_len)) {
799 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
804 /* Ciphers supported */
805 if (!WPACKET_start_sub_packet_u16(pkt)) {
806 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
809 /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */
810 if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt))
812 if (!WPACKET_close(pkt)) {
813 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
818 if (!WPACKET_start_sub_packet_u8(pkt)) {
819 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
822 #ifndef OPENSSL_NO_COMP
823 if (ssl_allow_compression(s) && s->ctx->comp_methods) {
824 int compnum = sk_SSL_COMP_num(s->ctx->comp_methods);
825 for (i = 0; i < compnum; i++) {
826 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
827 if (!WPACKET_put_bytes_u8(pkt, comp->id)) {
828 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
834 /* Add the NULL method */
835 if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) {
836 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
841 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
842 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
845 if (!WPACKET_start_sub_packet_u16(pkt)
847 * If extensions are of zero length then we don't even add the
848 * extensions length bytes
850 || !WPACKET_set_flags(pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH)
851 || !ssl_add_clienthello_tlsext(s, pkt, &al)
852 || !WPACKET_close(pkt)) {
853 ssl3_send_alert(s, SSL3_AL_FATAL, al);
854 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
858 if (!ssl_close_construct_packet(s, pkt)) {
859 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
866 MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
869 unsigned int cookie_len;
872 if (!PACKET_forward(pkt, 2)
873 || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
874 al = SSL_AD_DECODE_ERROR;
875 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
879 cookie_len = PACKET_remaining(&cookiepkt);
880 if (cookie_len > sizeof(s->d1->cookie)) {
881 al = SSL_AD_ILLEGAL_PARAMETER;
882 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
886 if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
887 al = SSL_AD_DECODE_ERROR;
888 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
891 s->d1->cookie_len = cookie_len;
893 return MSG_PROCESS_FINISHED_READING;
895 ssl3_send_alert(s, SSL3_AL_FATAL, al);
896 ossl_statem_set_error(s);
897 return MSG_PROCESS_ERROR;
900 MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
902 STACK_OF(SSL_CIPHER) *sk;
905 size_t session_id_len;
906 const unsigned char *cipherchars;
907 int i, al = SSL_AD_INTERNAL_ERROR;
908 unsigned int compression;
909 unsigned int sversion;
911 #ifndef OPENSSL_NO_COMP
915 if (!PACKET_get_net_2(pkt, &sversion)) {
916 al = SSL_AD_DECODE_ERROR;
917 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
921 protverr = ssl_choose_client_version(s, sversion);
923 al = SSL_AD_PROTOCOL_VERSION;
924 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
928 /* load the server hello data */
929 /* load the server random */
930 if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
931 al = SSL_AD_DECODE_ERROR;
932 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
938 /* Get the session-id. */
939 if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
940 al = SSL_AD_DECODE_ERROR;
941 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
944 session_id_len = PACKET_remaining(&session_id);
945 if (session_id_len > sizeof s->session->session_id
946 || session_id_len > SSL3_SESSION_ID_SIZE) {
947 al = SSL_AD_ILLEGAL_PARAMETER;
948 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
952 if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
953 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
954 al = SSL_AD_DECODE_ERROR;
959 * Check if we can resume the session based on external pre-shared secret.
960 * EAP-FAST (RFC 4851) supports two types of session resumption.
961 * Resumption based on server-side state works with session IDs.
962 * Resumption based on pre-shared Protected Access Credentials (PACs)
963 * works by overriding the SessionTicket extension at the application
964 * layer, and does not send a session ID. (We do not know whether EAP-FAST
965 * servers would honour the session ID.) Therefore, the session ID alone
966 * is not a reliable indicator of session resumption, so we first check if
967 * we can resume, and later peek at the next handshake message to see if the
968 * server wants to resume.
970 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
971 s->session->tlsext_tick) {
972 const SSL_CIPHER *pref_cipher = NULL;
973 s->session->master_key_length = sizeof(s->session->master_key);
974 if (s->tls_session_secret_cb(s, s->session->master_key,
975 &s->session->master_key_length,
977 s->tls_session_secret_cb_arg)) {
978 s->session->cipher = pref_cipher ?
979 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
981 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
982 al = SSL_AD_INTERNAL_ERROR;
987 if (session_id_len != 0 && session_id_len == s->session->session_id_length
988 && memcmp(PACKET_data(&session_id), s->session->session_id,
989 session_id_len) == 0) {
990 if (s->sid_ctx_length != s->session->sid_ctx_length
991 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
992 /* actually a client application bug */
993 al = SSL_AD_ILLEGAL_PARAMETER;
994 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
995 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1001 * If we were trying for session-id reuse but the server
1002 * didn't echo the ID, make a new SSL_SESSION.
1003 * In the case of EAP-FAST and PAC, we do not send a session ID,
1004 * so the PAC-based session secret is always preserved. It'll be
1005 * overwritten if the server refuses resumption.
1007 if (s->session->session_id_length > 0) {
1008 s->ctx->stats.sess_miss++;
1009 if (!ssl_get_new_session(s, 0)) {
1014 s->session->ssl_version = s->version;
1015 s->session->session_id_length = session_id_len;
1016 /* session_id_len could be 0 */
1017 memcpy(s->session->session_id, PACKET_data(&session_id),
1021 /* Session version and negotiated protocol version should match */
1022 if (s->version != s->session->ssl_version) {
1023 al = SSL_AD_PROTOCOL_VERSION;
1025 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1026 SSL_R_SSL_SESSION_VERSION_MISMATCH);
1030 c = ssl_get_cipher_by_char(s, cipherchars);
1032 /* unknown cipher */
1033 al = SSL_AD_ILLEGAL_PARAMETER;
1034 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1038 * Now that we know the version, update the check to see if it's an allowed
1041 s->s3->tmp.min_ver = s->version;
1042 s->s3->tmp.max_ver = s->version;
1044 * If it is a disabled cipher we either didn't send it in client hello,
1045 * or it's not allowed for the selected protocol. So we return an error.
1047 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1048 al = SSL_AD_ILLEGAL_PARAMETER;
1049 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1053 sk = ssl_get_ciphers_by_id(s);
1054 i = sk_SSL_CIPHER_find(sk, c);
1056 /* we did not say we would use this cipher */
1057 al = SSL_AD_ILLEGAL_PARAMETER;
1058 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1063 * Depending on the session caching (internal/external), the cipher
1064 * and/or cipher_id values may not be set. Make sure that cipher_id is
1065 * set and use it for comparison.
1067 if (s->session->cipher)
1068 s->session->cipher_id = s->session->cipher->id;
1069 if (s->hit && (s->session->cipher_id != c->id)) {
1070 al = SSL_AD_ILLEGAL_PARAMETER;
1071 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1072 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1075 s->s3->tmp.new_cipher = c;
1076 /* lets get the compression algorithm */
1078 if (!PACKET_get_1(pkt, &compression)) {
1079 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1080 al = SSL_AD_DECODE_ERROR;
1083 #ifdef OPENSSL_NO_COMP
1084 if (compression != 0) {
1085 al = SSL_AD_ILLEGAL_PARAMETER;
1086 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1087 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1091 * If compression is disabled we'd better not try to resume a session
1092 * using compression.
1094 if (s->session->compress_meth != 0) {
1095 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1099 if (s->hit && compression != s->session->compress_meth) {
1100 al = SSL_AD_ILLEGAL_PARAMETER;
1101 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1102 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1105 if (compression == 0)
1107 else if (!ssl_allow_compression(s)) {
1108 al = SSL_AD_ILLEGAL_PARAMETER;
1109 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1112 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1115 if (compression != 0 && comp == NULL) {
1116 al = SSL_AD_ILLEGAL_PARAMETER;
1117 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1118 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1121 s->s3->tmp.new_compression = comp;
1125 /* TLS extensions */
1126 if (!ssl_parse_serverhello_tlsext(s, pkt)) {
1127 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1131 if (PACKET_remaining(pkt) != 0) {
1132 /* wrong packet length */
1133 al = SSL_AD_DECODE_ERROR;
1134 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1137 #ifndef OPENSSL_NO_SCTP
1138 if (SSL_IS_DTLS(s) && s->hit) {
1139 unsigned char sctpauthkey[64];
1140 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
1143 * Add new shared key for SCTP-Auth, will be ignored if
1146 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
1147 sizeof(DTLS1_SCTP_AUTH_LABEL));
1149 if (SSL_export_keying_material(s, sctpauthkey,
1150 sizeof(sctpauthkey),
1152 sizeof(labelbuffer), NULL, 0, 0) <= 0)
1155 BIO_ctrl(SSL_get_wbio(s),
1156 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
1157 sizeof(sctpauthkey), sctpauthkey);
1161 return MSG_PROCESS_CONTINUE_READING;
1163 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1165 ossl_statem_set_error(s);
1166 return MSG_PROCESS_ERROR;
1169 MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
1171 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
1172 unsigned long cert_list_len, cert_len;
1174 const unsigned char *certstart, *certbytes;
1175 STACK_OF(X509) *sk = NULL;
1176 EVP_PKEY *pkey = NULL;
1178 if ((sk = sk_X509_new_null()) == NULL) {
1179 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1183 if (!PACKET_get_net_3(pkt, &cert_list_len)
1184 || PACKET_remaining(pkt) != cert_list_len) {
1185 al = SSL_AD_DECODE_ERROR;
1186 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1189 while (PACKET_remaining(pkt)) {
1190 if (!PACKET_get_net_3(pkt, &cert_len)
1191 || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
1192 al = SSL_AD_DECODE_ERROR;
1193 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1194 SSL_R_CERT_LENGTH_MISMATCH);
1198 certstart = certbytes;
1199 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1201 al = SSL_AD_BAD_CERTIFICATE;
1202 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1205 if (certbytes != (certstart + cert_len)) {
1206 al = SSL_AD_DECODE_ERROR;
1207 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1208 SSL_R_CERT_LENGTH_MISMATCH);
1211 if (!sk_X509_push(sk, x)) {
1212 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1218 i = ssl_verify_cert_chain(s, sk);
1219 if ((s->verify_mode & SSL_VERIFY_PEER) && i <= 0) {
1220 al = ssl_verify_alarm_type(s->verify_result);
1221 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1222 SSL_R_CERTIFICATE_VERIFY_FAILED);
1225 ERR_clear_error(); /* but we keep s->verify_result */
1227 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
1228 al = SSL_AD_HANDSHAKE_FAILURE;
1232 s->session->peer_chain = sk;
1234 * Inconsistency alert: cert_chain does include the peer's certificate,
1235 * which we don't include in statem_srvr.c
1237 x = sk_X509_value(sk, 0);
1240 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1243 pkey = X509_get0_pubkey(x);
1245 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1248 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1249 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1253 i = ssl_cert_type(x, pkey);
1257 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1258 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1262 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1263 if (exp_idx >= 0 && i != exp_idx
1264 && (exp_idx != SSL_PKEY_GOST_EC ||
1265 (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
1266 && i != SSL_PKEY_GOST01))) {
1268 al = SSL_AD_ILLEGAL_PARAMETER;
1269 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1270 SSL_R_WRONG_CERTIFICATE_TYPE);
1273 s->session->peer_type = i;
1275 X509_free(s->session->peer);
1277 s->session->peer = x;
1278 s->session->verify_result = s->verify_result;
1281 ret = MSG_PROCESS_CONTINUE_READING;
1285 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1287 ossl_statem_set_error(s);
1290 sk_X509_pop_free(sk, X509_free);
1294 static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al)
1296 #ifndef OPENSSL_NO_PSK
1297 PACKET psk_identity_hint;
1299 /* PSK ciphersuites are preceded by an identity hint */
1301 if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
1302 *al = SSL_AD_DECODE_ERROR;
1303 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH);
1308 * Store PSK identity hint for later use, hint is used in
1309 * tls_construct_client_key_exchange. Assume that the maximum length of
1310 * a PSK identity hint can be as long as the maximum length of a PSK
1313 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1314 *al = SSL_AD_HANDSHAKE_FAILURE;
1315 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG);
1319 if (PACKET_remaining(&psk_identity_hint) == 0) {
1320 OPENSSL_free(s->session->psk_identity_hint);
1321 s->session->psk_identity_hint = NULL;
1322 } else if (!PACKET_strndup(&psk_identity_hint,
1323 &s->session->psk_identity_hint)) {
1324 *al = SSL_AD_INTERNAL_ERROR;
1330 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
1331 *al = SSL_AD_INTERNAL_ERROR;
1336 static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1338 #ifndef OPENSSL_NO_SRP
1339 PACKET prime, generator, salt, server_pub;
1341 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1342 || !PACKET_get_length_prefixed_2(pkt, &generator)
1343 || !PACKET_get_length_prefixed_1(pkt, &salt)
1344 || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
1345 *al = SSL_AD_DECODE_ERROR;
1346 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH);
1351 BN_bin2bn(PACKET_data(&prime),
1352 PACKET_remaining(&prime), NULL)) == NULL
1354 BN_bin2bn(PACKET_data(&generator),
1355 PACKET_remaining(&generator), NULL)) == NULL
1357 BN_bin2bn(PACKET_data(&salt),
1358 PACKET_remaining(&salt), NULL)) == NULL
1360 BN_bin2bn(PACKET_data(&server_pub),
1361 PACKET_remaining(&server_pub), NULL)) == NULL) {
1362 *al = SSL_AD_INTERNAL_ERROR;
1363 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
1367 if (!srp_verify_server_param(s, al)) {
1368 *al = SSL_AD_DECODE_ERROR;
1369 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
1373 /* We must check if there is a certificate */
1374 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1375 *pkey = X509_get0_pubkey(s->session->peer);
1379 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
1380 *al = SSL_AD_INTERNAL_ERROR;
1385 static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1387 #ifndef OPENSSL_NO_DH
1388 PACKET prime, generator, pub_key;
1389 EVP_PKEY *peer_tmp = NULL;
1392 BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
1394 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1395 || !PACKET_get_length_prefixed_2(pkt, &generator)
1396 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1397 *al = SSL_AD_DECODE_ERROR;
1398 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
1402 peer_tmp = EVP_PKEY_new();
1405 if (peer_tmp == NULL || dh == NULL) {
1406 *al = SSL_AD_INTERNAL_ERROR;
1407 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
1411 p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
1412 g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), NULL);
1413 bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
1415 if (p == NULL || g == NULL || bnpub_key == NULL) {
1416 *al = SSL_AD_INTERNAL_ERROR;
1417 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1421 if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) {
1422 *al = SSL_AD_DECODE_ERROR;
1423 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
1427 if (!DH_set0_pqg(dh, p, NULL, g)) {
1428 *al = SSL_AD_INTERNAL_ERROR;
1429 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1434 if (!DH_set0_key(dh, bnpub_key, NULL)) {
1435 *al = SSL_AD_INTERNAL_ERROR;
1436 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1441 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1442 *al = SSL_AD_HANDSHAKE_FAILURE;
1443 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
1447 if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
1448 *al = SSL_AD_INTERNAL_ERROR;
1449 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
1453 s->s3->peer_tmp = peer_tmp;
1456 * FIXME: This makes assumptions about which ciphersuites come with
1457 * public keys. We should have a less ad-hoc way of doing this
1459 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1460 *pkey = X509_get0_pubkey(s->session->peer);
1461 /* else anonymous DH, so no certificate or pkey. */
1470 EVP_PKEY_free(peer_tmp);
1474 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
1475 *al = SSL_AD_INTERNAL_ERROR;
1480 static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1482 #ifndef OPENSSL_NO_EC
1484 const unsigned char *ecparams;
1486 unsigned int curve_flags;
1487 EVP_PKEY_CTX *pctx = NULL;
1490 * Extract elliptic curve parameters and the server's ephemeral ECDH
1491 * public key. For now we only support named (not generic) curves and
1492 * ECParameters in this case is just three bytes.
1494 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1495 *al = SSL_AD_DECODE_ERROR;
1496 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
1500 * Check curve is one of our preferences, if not server has sent an
1501 * invalid curve. ECParameters is 3 bytes.
1503 if (!tls1_check_curve(s, ecparams, 3)) {
1504 *al = SSL_AD_DECODE_ERROR;
1505 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
1509 curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
1511 if (curve_nid == 0) {
1512 *al = SSL_AD_INTERNAL_ERROR;
1513 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
1514 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1518 if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
1519 EVP_PKEY *key = EVP_PKEY_new();
1521 if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
1522 *al = SSL_AD_INTERNAL_ERROR;
1523 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1527 s->s3->peer_tmp = key;
1529 /* Set up EVP_PKEY with named curve as parameters */
1530 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
1532 || EVP_PKEY_paramgen_init(pctx) <= 0
1533 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
1534 || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
1535 *al = SSL_AD_INTERNAL_ERROR;
1536 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1537 EVP_PKEY_CTX_free(pctx);
1540 EVP_PKEY_CTX_free(pctx);
1544 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1545 *al = SSL_AD_DECODE_ERROR;
1546 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
1550 if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
1551 PACKET_data(&encoded_pt),
1552 PACKET_remaining(&encoded_pt))) {
1553 *al = SSL_AD_DECODE_ERROR;
1554 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
1559 * The ECC/TLS specification does not mention the use of DSA to sign
1560 * ECParameters in the server key exchange message. We do support RSA
1563 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
1564 *pkey = X509_get0_pubkey(s->session->peer);
1565 else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
1566 *pkey = X509_get0_pubkey(s->session->peer);
1567 /* else anonymous ECDH, so no certificate or pkey. */
1571 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
1572 *al = SSL_AD_INTERNAL_ERROR;
1577 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1581 EVP_PKEY *pkey = NULL;
1582 PACKET save_param_start, signature;
1584 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1586 save_param_start = *pkt;
1588 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1589 EVP_PKEY_free(s->s3->peer_tmp);
1590 s->s3->peer_tmp = NULL;
1593 if (alg_k & SSL_PSK) {
1594 if (!tls_process_ske_psk_preamble(s, pkt, &al))
1598 /* Nothing else to do for plain PSK or RSAPSK */
1599 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1600 } else if (alg_k & SSL_kSRP) {
1601 if (!tls_process_ske_srp(s, pkt, &pkey, &al))
1603 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1604 if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
1606 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1607 if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
1610 al = SSL_AD_UNEXPECTED_MESSAGE;
1611 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1615 /* if it was signed, check the signature */
1619 const EVP_MD *md = NULL;
1623 * |pkt| now points to the beginning of the signature, so the difference
1624 * equals the length of the parameters.
1626 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1627 PACKET_remaining(&save_param_start) -
1628 PACKET_remaining(pkt))) {
1629 al = SSL_AD_INTERNAL_ERROR;
1630 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1634 if (SSL_USE_SIGALGS(s)) {
1635 const unsigned char *sigalgs;
1637 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1638 al = SSL_AD_DECODE_ERROR;
1639 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1642 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1644 al = SSL_AD_INTERNAL_ERROR;
1646 } else if (rv == 0) {
1647 al = SSL_AD_DECODE_ERROR;
1651 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1653 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
1654 md = EVP_md5_sha1();
1659 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1660 || PACKET_remaining(pkt) != 0) {
1661 al = SSL_AD_DECODE_ERROR;
1662 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1665 maxsig = EVP_PKEY_size(pkey);
1667 al = SSL_AD_INTERNAL_ERROR;
1668 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1673 * Check signature length
1675 if (PACKET_remaining(&signature) > (size_t)maxsig) {
1676 /* wrong packet length */
1677 al = SSL_AD_DECODE_ERROR;
1678 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1679 SSL_R_WRONG_SIGNATURE_LENGTH);
1683 md_ctx = EVP_MD_CTX_new();
1684 if (md_ctx == NULL) {
1685 al = SSL_AD_INTERNAL_ERROR;
1686 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1690 if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
1691 || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
1692 SSL3_RANDOM_SIZE) <= 0
1693 || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
1694 SSL3_RANDOM_SIZE) <= 0
1695 || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
1696 PACKET_remaining(¶ms)) <= 0) {
1697 EVP_MD_CTX_free(md_ctx);
1698 al = SSL_AD_INTERNAL_ERROR;
1699 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1702 if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
1703 PACKET_remaining(&signature), pkey) <= 0) {
1705 EVP_MD_CTX_free(md_ctx);
1706 al = SSL_AD_DECRYPT_ERROR;
1707 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1710 EVP_MD_CTX_free(md_ctx);
1712 /* aNULL, aSRP or PSK do not need public keys */
1713 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
1714 && !(alg_k & SSL_PSK)) {
1715 /* Might be wrong key type, check it */
1716 if (ssl3_check_cert_and_algorithm(s)) {
1717 /* Otherwise this shouldn't happen */
1718 al = SSL_AD_INTERNAL_ERROR;
1719 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1721 al = SSL_AD_DECODE_ERROR;
1725 /* still data left over */
1726 if (PACKET_remaining(pkt) != 0) {
1727 al = SSL_AD_DECODE_ERROR;
1728 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1733 return MSG_PROCESS_CONTINUE_READING;
1736 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1737 ossl_statem_set_error(s);
1738 return MSG_PROCESS_ERROR;
1741 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
1743 int ret = MSG_PROCESS_ERROR;
1744 unsigned int list_len, ctype_num, i, name_len;
1745 X509_NAME *xn = NULL;
1746 const unsigned char *data;
1747 const unsigned char *namestart, *namebytes;
1748 STACK_OF(X509_NAME) *ca_sk = NULL;
1750 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1751 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1755 /* get the certificate types */
1756 if (!PACKET_get_1(pkt, &ctype_num)
1757 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
1758 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1759 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1762 OPENSSL_free(s->cert->ctypes);
1763 s->cert->ctypes = NULL;
1764 if (ctype_num > SSL3_CT_NUMBER) {
1765 /* If we exceed static buffer copy all to cert structure */
1766 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1767 if (s->cert->ctypes == NULL) {
1768 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1771 memcpy(s->cert->ctypes, data, ctype_num);
1772 s->cert->ctype_num = (size_t)ctype_num;
1773 ctype_num = SSL3_CT_NUMBER;
1775 for (i = 0; i < ctype_num; i++)
1776 s->s3->tmp.ctype[i] = data[i];
1778 if (SSL_USE_SIGALGS(s)) {
1779 if (!PACKET_get_net_2(pkt, &list_len)
1780 || !PACKET_get_bytes(pkt, &data, list_len)) {
1781 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1782 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1783 SSL_R_LENGTH_MISMATCH);
1787 /* Clear certificate digests and validity flags */
1788 for (i = 0; i < SSL_PKEY_NUM; i++) {
1789 s->s3->tmp.md[i] = NULL;
1790 s->s3->tmp.valid_flags[i] = 0;
1792 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1793 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1794 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1795 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1798 if (!tls1_process_sigalgs(s)) {
1799 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1800 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1804 ssl_set_default_md(s);
1807 /* get the CA RDNs */
1808 if (!PACKET_get_net_2(pkt, &list_len)
1809 || PACKET_remaining(pkt) != list_len) {
1810 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1811 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1815 while (PACKET_remaining(pkt)) {
1816 if (!PACKET_get_net_2(pkt, &name_len)
1817 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
1818 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1819 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1820 SSL_R_LENGTH_MISMATCH);
1824 namestart = namebytes;
1826 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
1827 name_len)) == NULL) {
1828 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1829 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1833 if (namebytes != (namestart + name_len)) {
1834 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1835 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1836 SSL_R_CA_DN_LENGTH_MISMATCH);
1839 if (!sk_X509_NAME_push(ca_sk, xn)) {
1840 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1846 /* we should setup a certificate to return.... */
1847 s->s3->tmp.cert_req = 1;
1848 s->s3->tmp.ctype_num = ctype_num;
1849 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1850 s->s3->tmp.ca_names = ca_sk;
1853 ret = MSG_PROCESS_CONTINUE_PROCESSING;
1856 ossl_statem_set_error(s);
1859 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1863 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
1865 return (X509_NAME_cmp(*a, *b));
1868 MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
1871 unsigned int ticklen;
1872 unsigned long ticket_lifetime_hint;
1874 if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
1875 || !PACKET_get_net_2(pkt, &ticklen)
1876 || PACKET_remaining(pkt) != ticklen) {
1877 al = SSL_AD_DECODE_ERROR;
1878 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1882 /* Server is allowed to change its mind and send an empty ticket. */
1884 return MSG_PROCESS_CONTINUE_READING;
1886 if (s->session->session_id_length > 0) {
1887 int i = s->session_ctx->session_cache_mode;
1888 SSL_SESSION *new_sess;
1890 * We reused an existing session, so we need to replace it with a new
1893 if (i & SSL_SESS_CACHE_CLIENT) {
1895 * Remove the old session from the cache. We carry on if this fails
1897 SSL_CTX_remove_session(s->session_ctx, s->session);
1900 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1901 al = SSL_AD_INTERNAL_ERROR;
1902 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1906 SSL_SESSION_free(s->session);
1907 s->session = new_sess;
1910 OPENSSL_free(s->session->tlsext_tick);
1911 s->session->tlsext_ticklen = 0;
1913 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1914 if (s->session->tlsext_tick == NULL) {
1915 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1918 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
1919 al = SSL_AD_DECODE_ERROR;
1920 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1924 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
1925 s->session->tlsext_ticklen = ticklen;
1927 * There are two ways to detect a resumed ticket session. One is to set
1928 * an appropriate session ID and then the server must return a match in
1929 * ServerHello. This allows the normal client session ID matching to work
1930 * and we know much earlier that the ticket has been accepted. The
1931 * other way is to set zero length session ID when the ticket is
1932 * presented and rely on the handshake to determine session resumption.
1933 * We choose the former approach because this fits in with assumptions
1934 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1935 * SHA256 is disabled) hash of the ticket.
1937 if (!EVP_Digest(s->session->tlsext_tick, ticklen,
1938 s->session->session_id, &s->session->session_id_length,
1939 EVP_sha256(), NULL)) {
1940 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
1943 return MSG_PROCESS_CONTINUE_READING;
1945 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1947 ossl_statem_set_error(s);
1948 return MSG_PROCESS_ERROR;
1951 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
1954 unsigned long resplen;
1957 if (!PACKET_get_1(pkt, &type)
1958 || type != TLSEXT_STATUSTYPE_ocsp) {
1959 al = SSL_AD_DECODE_ERROR;
1960 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1963 if (!PACKET_get_net_3(pkt, &resplen)
1964 || PACKET_remaining(pkt) != resplen) {
1965 al = SSL_AD_DECODE_ERROR;
1966 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1969 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
1970 if (s->tlsext_ocsp_resp == NULL) {
1971 al = SSL_AD_INTERNAL_ERROR;
1972 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1975 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
1976 al = SSL_AD_DECODE_ERROR;
1977 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1980 s->tlsext_ocsp_resplen = resplen;
1981 return MSG_PROCESS_CONTINUE_READING;
1983 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1984 ossl_statem_set_error(s);
1985 return MSG_PROCESS_ERROR;
1988 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
1990 if (PACKET_remaining(pkt) > 0) {
1991 /* should contain no data */
1992 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1993 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
1994 ossl_statem_set_error(s);
1995 return MSG_PROCESS_ERROR;
1997 #ifndef OPENSSL_NO_SRP
1998 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
1999 if (SRP_Calc_A_param(s) <= 0) {
2000 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2001 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2002 ossl_statem_set_error(s);
2003 return MSG_PROCESS_ERROR;
2009 * at this point we check that we have the required stuff from
2012 if (!ssl3_check_cert_and_algorithm(s)) {
2013 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2014 ossl_statem_set_error(s);
2015 return MSG_PROCESS_ERROR;
2019 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2020 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2021 * message, or NULL and -1 otherwise
2023 if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
2025 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2027 ssl3_send_alert(s, SSL3_AL_FATAL,
2028 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
2029 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
2030 SSL_R_INVALID_STATUS_RESPONSE);
2031 return MSG_PROCESS_ERROR;
2034 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2035 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
2036 return MSG_PROCESS_ERROR;
2039 #ifndef OPENSSL_NO_CT
2040 if (s->ct_validation_callback != NULL) {
2041 /* Note we validate the SCTs whether or not we abort on error */
2042 if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
2043 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2044 return MSG_PROCESS_ERROR;
2049 #ifndef OPENSSL_NO_SCTP
2050 /* Only applies to renegotiation */
2051 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2052 && s->renegotiate != 0)
2053 return MSG_PROCESS_CONTINUE_PROCESSING;
2056 return MSG_PROCESS_FINISHED_READING;
2059 static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al)
2061 #ifndef OPENSSL_NO_PSK
2064 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2065 * \0-terminated identity. The last byte is for us for simulating
2068 char identity[PSK_MAX_IDENTITY_LEN + 1];
2069 size_t identitylen = 0;
2070 unsigned char psk[PSK_MAX_PSK_LEN];
2071 unsigned char *tmppsk = NULL;
2072 char *tmpidentity = NULL;
2075 if (s->psk_client_callback == NULL) {
2076 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
2077 *al = SSL_AD_INTERNAL_ERROR;
2081 memset(identity, 0, sizeof(identity));
2083 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2084 identity, sizeof(identity) - 1,
2087 if (psklen > PSK_MAX_PSK_LEN) {
2088 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2089 *al = SSL_AD_HANDSHAKE_FAILURE;
2091 } else if (psklen == 0) {
2092 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
2093 SSL_R_PSK_IDENTITY_NOT_FOUND);
2094 *al = SSL_AD_HANDSHAKE_FAILURE;
2098 identitylen = strlen(identity);
2099 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2100 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2101 *al = SSL_AD_HANDSHAKE_FAILURE;
2105 tmppsk = OPENSSL_memdup(psk, psklen);
2106 tmpidentity = OPENSSL_strdup(identity);
2107 if (tmppsk == NULL || tmpidentity == NULL) {
2108 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
2109 *al = SSL_AD_INTERNAL_ERROR;
2113 OPENSSL_free(s->s3->tmp.psk);
2114 s->s3->tmp.psk = tmppsk;
2115 s->s3->tmp.psklen = psklen;
2117 OPENSSL_free(s->session->psk_identity);
2118 s->session->psk_identity = tmpidentity;
2121 if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) {
2122 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2123 *al = SSL_AD_INTERNAL_ERROR;
2130 OPENSSL_cleanse(psk, psklen);
2131 OPENSSL_cleanse(identity, sizeof(identity));
2132 OPENSSL_clear_free(tmppsk, psklen);
2133 OPENSSL_clear_free(tmpidentity, identitylen);
2137 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2138 *al = SSL_AD_INTERNAL_ERROR;
2143 static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al)
2145 #ifndef OPENSSL_NO_RSA
2146 unsigned char *encdata = NULL;
2147 EVP_PKEY *pkey = NULL;
2148 EVP_PKEY_CTX *pctx = NULL;
2150 unsigned char *pms = NULL;
2153 if (s->session->peer == NULL) {
2155 * We should always have a server certificate with SSL_kRSA.
2157 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2161 pkey = X509_get0_pubkey(s->session->peer);
2162 if (EVP_PKEY_get0_RSA(pkey) == NULL) {
2163 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2167 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2168 pms = OPENSSL_malloc(pmslen);
2170 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
2171 *al = SSL_AD_INTERNAL_ERROR;
2175 pms[0] = s->client_version >> 8;
2176 pms[1] = s->client_version & 0xff;
2177 if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
2181 /* Fix buf for TLS and beyond */
2182 if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) {
2183 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2186 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2187 if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
2188 || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
2189 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
2192 if (!WPACKET_allocate_bytes(pkt, enclen, &encdata)
2193 || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) {
2194 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
2197 EVP_PKEY_CTX_free(pctx);
2200 if (s->options & SSL_OP_PKCS1_CHECK_1)
2202 if (s->options & SSL_OP_PKCS1_CHECK_2)
2206 /* Fix buf for TLS and beyond */
2207 if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) {
2208 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2212 s->s3->tmp.pms = pms;
2213 s->s3->tmp.pmslen = pmslen;
2217 OPENSSL_clear_free(pms, pmslen);
2218 EVP_PKEY_CTX_free(pctx);
2222 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2223 *al = SSL_AD_INTERNAL_ERROR;
2228 static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al)
2230 #ifndef OPENSSL_NO_DH
2232 const BIGNUM *pub_key;
2233 EVP_PKEY *ckey = NULL, *skey = NULL;
2234 unsigned char *keybytes = NULL;
2236 skey = s->s3->peer_tmp;
2240 ckey = ssl_generate_pkey(skey);
2241 dh_clnt = EVP_PKEY_get0_DH(ckey);
2243 if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0)
2246 /* send off the data */
2247 DH_get0_key(dh_clnt, &pub_key, NULL);
2248 if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes))
2251 BN_bn2bin(pub_key, keybytes);
2252 EVP_PKEY_free(ckey);
2256 EVP_PKEY_free(ckey);
2258 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2259 *al = SSL_AD_INTERNAL_ERROR;
2263 static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al)
2265 #ifndef OPENSSL_NO_EC
2266 unsigned char *encodedPoint = NULL;
2267 int encoded_pt_len = 0;
2268 EVP_PKEY *ckey = NULL, *skey = NULL;
2271 skey = s->s3->peer_tmp;
2273 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2277 ckey = ssl_generate_pkey(skey);
2279 if (ssl_derive(s, ckey, skey) == 0) {
2280 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
2284 /* Generate encoding of client key */
2285 encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
2287 if (encoded_pt_len == 0) {
2288 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
2292 if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) {
2293 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2299 OPENSSL_free(encodedPoint);
2300 EVP_PKEY_free(ckey);
2303 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2304 *al = SSL_AD_INTERNAL_ERROR;
2309 static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al)
2311 #ifndef OPENSSL_NO_GOST
2312 /* GOST key exchange message creation */
2313 EVP_PKEY_CTX *pkey_ctx = NULL;
2316 unsigned int md_len;
2317 unsigned char shared_ukm[32], tmp[256];
2318 EVP_MD_CTX *ukm_hash = NULL;
2319 int dgst_nid = NID_id_GostR3411_94;
2320 unsigned char *pms = NULL;
2323 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2324 dgst_nid = NID_id_GostR3411_2012_256;
2327 * Get server sertificate PKEY and create ctx from it
2329 peer_cert = s->session->peer;
2331 *al = SSL_AD_HANDSHAKE_FAILURE;
2332 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
2333 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2337 pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
2338 if (pkey_ctx == NULL) {
2339 *al = SSL_AD_INTERNAL_ERROR;
2340 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2344 * If we have send a certificate, and certificate key
2345 * parameters match those of server certificate, use
2346 * certificate key for key exchange
2349 /* Otherwise, generate ephemeral key pair */
2351 pms = OPENSSL_malloc(pmslen);
2353 *al = SSL_AD_INTERNAL_ERROR;
2354 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2358 if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2359 /* Generate session key */
2360 || RAND_bytes(pms, pmslen) <= 0) {
2361 *al = SSL_AD_INTERNAL_ERROR;
2362 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2366 * Compute shared IV and store it in algorithm-specific context
2369 ukm_hash = EVP_MD_CTX_new();
2370 if (ukm_hash == NULL
2371 || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0
2372 || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2373 SSL3_RANDOM_SIZE) <= 0
2374 || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2375 SSL3_RANDOM_SIZE) <= 0
2376 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
2377 *al = SSL_AD_INTERNAL_ERROR;
2378 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2381 EVP_MD_CTX_free(ukm_hash);
2383 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
2384 EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
2385 *al = SSL_AD_INTERNAL_ERROR;
2386 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2389 /* Make GOST keytransport blob message */
2391 * Encapsulate it into sequence
2394 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
2395 *al = SSL_AD_INTERNAL_ERROR;
2396 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2400 if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)
2401 || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81))
2402 || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) {
2403 *al = SSL_AD_INTERNAL_ERROR;
2404 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2408 EVP_PKEY_CTX_free(pkey_ctx);
2409 s->s3->tmp.pms = pms;
2410 s->s3->tmp.pmslen = pmslen;
2414 EVP_PKEY_CTX_free(pkey_ctx);
2415 OPENSSL_clear_free(pms, pmslen);
2416 EVP_MD_CTX_free(ukm_hash);
2419 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2420 *al = SSL_AD_INTERNAL_ERROR;
2425 static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al)
2427 #ifndef OPENSSL_NO_SRP
2428 unsigned char *abytes = NULL;
2430 if (s->srp_ctx.A == NULL
2431 || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A),
2433 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2436 BN_bn2bin(s->srp_ctx.A, abytes);
2438 OPENSSL_free(s->session->srp_username);
2439 s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
2440 if (s->session->srp_username == NULL) {
2441 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE);
2447 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2448 *al = SSL_AD_INTERNAL_ERROR;
2453 int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt)
2455 unsigned long alg_k;
2458 if (!ssl_set_handshake_header(s, pkt, SSL3_MT_CLIENT_KEY_EXCHANGE)) {
2459 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2460 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2464 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2466 if ((alg_k & SSL_PSK)
2467 && !tls_construct_cke_psk_preamble(s, pkt, &al))
2470 if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2471 if (!tls_construct_cke_rsa(s, pkt, &al))
2473 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
2474 if (!tls_construct_cke_dhe(s, pkt, &al))
2476 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
2477 if (!tls_construct_cke_ecdhe(s, pkt, &al))
2479 } else if (alg_k & SSL_kGOST) {
2480 if (!tls_construct_cke_gost(s, pkt, &al))
2482 } else if (alg_k & SSL_kSRP) {
2483 if (!tls_construct_cke_srp(s, pkt, &al))
2485 } else if (!(alg_k & SSL_kPSK)) {
2486 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2487 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2491 if (!ssl_close_construct_packet(s, pkt)) {
2492 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2493 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2500 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2501 OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
2502 s->s3->tmp.pms = NULL;
2503 #ifndef OPENSSL_NO_PSK
2504 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2505 s->s3->tmp.psk = NULL;
2510 int tls_client_key_exchange_post_work(SSL *s)
2512 unsigned char *pms = NULL;
2515 pms = s->s3->tmp.pms;
2516 pmslen = s->s3->tmp.pmslen;
2518 #ifndef OPENSSL_NO_SRP
2520 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2521 if (!srp_generate_client_master_secret(s)) {
2522 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2523 ERR_R_INTERNAL_ERROR);
2530 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2531 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2532 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2535 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2536 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2537 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2538 /* ssl_generate_master_secret frees the pms even on error */
2546 #ifndef OPENSSL_NO_SCTP
2547 if (SSL_IS_DTLS(s)) {
2548 unsigned char sctpauthkey[64];
2549 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2552 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2555 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
2556 sizeof(DTLS1_SCTP_AUTH_LABEL));
2558 if (SSL_export_keying_material(s, sctpauthkey,
2559 sizeof(sctpauthkey), labelbuffer,
2560 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2563 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2564 sizeof(sctpauthkey), sctpauthkey);
2570 OPENSSL_clear_free(pms, pmslen);
2571 s->s3->tmp.pms = NULL;
2575 int tls_construct_client_verify(SSL *s, WPACKET *pkt)
2578 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2579 EVP_MD_CTX *mctx = NULL;
2583 unsigned char *sig = NULL;
2585 if (!ssl_set_handshake_header(s, pkt, SSL3_MT_CERTIFICATE_VERIFY)) {
2586 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
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))
2643 if (!ssl_close_construct_packet(s, pkt)) {
2644 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2649 EVP_MD_CTX_free(mctx);
2653 EVP_MD_CTX_free(mctx);
2654 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2659 * Check a certificate can be used for client authentication. Currently check
2660 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2661 * certificates can be used and optionally checks suitability for Suite B.
2663 static int ssl3_check_client_certificate(SSL *s)
2665 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
2667 /* If no suitable signature algorithm can't use certificate */
2668 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
2671 * If strict mode check suitability of chain before using it. This also
2672 * adjusts suite B digest if necessary.
2674 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
2675 !tls1_check_chain(s, NULL, NULL, NULL, -2))
2680 WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
2683 EVP_PKEY *pkey = NULL;
2686 if (wst == WORK_MORE_A) {
2687 /* Let cert callback update client certificates if required */
2688 if (s->cert->cert_cb) {
2689 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
2691 s->rwstate = SSL_X509_LOOKUP;
2695 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2696 ossl_statem_set_error(s);
2699 s->rwstate = SSL_NOTHING;
2701 if (ssl3_check_client_certificate(s))
2702 return WORK_FINISHED_CONTINUE;
2704 /* Fall through to WORK_MORE_B */
2708 /* We need to get a client cert */
2709 if (wst == WORK_MORE_B) {
2711 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2712 * return(-1); We then get retied later
2714 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2716 s->rwstate = SSL_X509_LOOKUP;
2719 s->rwstate = SSL_NOTHING;
2720 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2721 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2723 } else if (i == 1) {
2725 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
2726 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2730 EVP_PKEY_free(pkey);
2731 if (i && !ssl3_check_client_certificate(s))
2734 if (s->version == SSL3_VERSION) {
2735 s->s3->tmp.cert_req = 0;
2736 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2737 return WORK_FINISHED_CONTINUE;
2739 s->s3->tmp.cert_req = 2;
2740 if (!ssl3_digest_cached_records(s, 0)) {
2741 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2742 ossl_statem_set_error(s);
2748 return WORK_FINISHED_CONTINUE;
2751 /* Shouldn't ever get here */
2755 int tls_construct_client_certificate(SSL *s, WPACKET *pkt)
2757 if (!ssl3_output_cert_chain(s, pkt,
2758 (s->s3->tmp.cert_req ==
2759 2) ? NULL : s->cert->key)) {
2760 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
2761 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2768 #define has_bits(i,m) (((i)&(m)) == (m))
2770 int ssl3_check_cert_and_algorithm(SSL *s)
2773 #ifndef OPENSSL_NO_EC
2777 EVP_PKEY *pkey = NULL;
2778 int al = SSL_AD_HANDSHAKE_FAILURE;
2780 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2781 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2783 /* we don't have a certificate */
2784 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
2787 /* This is the passed certificate */
2789 #ifndef OPENSSL_NO_EC
2790 idx = s->session->peer_type;
2791 if (idx == SSL_PKEY_ECC) {
2792 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
2794 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2799 } else if (alg_a & SSL_aECDSA) {
2800 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2801 SSL_R_MISSING_ECDSA_SIGNING_CERT);
2805 pkey = X509_get0_pubkey(s->session->peer);
2806 i = X509_certificate_type(s->session->peer, pkey);
2808 /* Check that we have a certificate if we require one */
2809 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2810 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2811 SSL_R_MISSING_RSA_SIGNING_CERT);
2814 #ifndef OPENSSL_NO_DSA
2815 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2816 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2817 SSL_R_MISSING_DSA_SIGNING_CERT);
2821 #ifndef OPENSSL_NO_RSA
2822 if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
2823 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2824 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2825 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2829 #ifndef OPENSSL_NO_DH
2830 if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
2831 al = SSL_AD_INTERNAL_ERROR;
2832 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
2839 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2843 #ifndef OPENSSL_NO_NEXTPROTONEG
2844 int tls_construct_next_proto(SSL *s, WPACKET *pkt)
2846 size_t len, padding_len;
2847 unsigned char *padding = NULL;
2849 if (!ssl_set_handshake_header(s, pkt, SSL3_MT_NEXT_PROTO)) {
2850 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2854 len = s->next_proto_negotiated_len;
2855 padding_len = 32 - ((len + 2) % 32);
2857 if (!WPACKET_sub_memcpy_u8(pkt, s->next_proto_negotiated, len)
2858 || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) {
2859 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2863 memset(padding, 0, padding_len);
2865 if (!ssl_close_construct_packet(s, pkt)) {
2866 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2872 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2877 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2880 #ifndef OPENSSL_NO_ENGINE
2881 if (s->ctx->client_cert_engine) {
2882 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2883 SSL_get_client_CA_list(s),
2884 px509, ppkey, NULL, NULL, NULL);
2889 if (s->ctx->client_cert_cb)
2890 i = s->ctx->client_cert_cb(s, px509, ppkey);
2894 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt)
2897 size_t totlen = 0, len, maxlen;
2898 int empty_reneg_info_scsv = !s->renegotiate;
2899 /* Set disabled masks for this session */
2900 ssl_set_client_disabled(s);
2905 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
2906 # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6
2907 # error Max cipher length too short
2910 * Some servers hang if client hello > 256 bytes as hack workaround
2911 * chop number of supported ciphers to keep it well below this if we
2914 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2915 maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
2918 /* Maximum length that can be stored in 2 bytes. Length must be even */
2921 if (empty_reneg_info_scsv)
2923 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
2926 for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) {
2927 const SSL_CIPHER *c;
2929 c = sk_SSL_CIPHER_value(sk, i);
2930 /* Skip disabled ciphers */
2931 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
2934 if (!s->method->put_cipher_by_char(c, pkt, &len)) {
2935 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2943 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE);
2948 if (empty_reneg_info_scsv) {
2949 static SSL_CIPHER scsv = {
2950 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2952 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2953 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2957 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
2958 static SSL_CIPHER scsv = {
2959 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2961 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2962 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);