1 /* ssl/statem/statem_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
152 #include "../ssl_locl.h"
153 #include "statem_locl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
159 #ifndef OPENSSL_NO_DH
160 # include <openssl/dh.h>
162 #include <openssl/bn.h>
163 #ifndef OPENSSL_NO_ENGINE
164 # include <openssl/engine.h>
167 static inline int cert_req_allowed(SSL *s);
168 static int key_exchange_expected(SSL *s);
169 static int ssl_set_version(SSL *s);
170 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
171 static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
176 * Is a CertificateRequest message allowed at the moment or not?
182 static inline int cert_req_allowed(SSL *s)
184 /* TLS does not like anon-DH with client cert */
185 if ((s->version > SSL3_VERSION
186 && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
187 || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK)))
194 * Should we expect the ServerKeyExchange message or not?
201 static int key_exchange_expected(SSL *s)
203 long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
206 * Can't skip server key exchange if this is an ephemeral
207 * ciphersuite or for SRP
209 if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK
215 * Export ciphersuites may have temporary RSA keys if the public key in the
216 * server certificate is longer than the maximum export strength
218 if ((alg_k & SSL_kRSA) && SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
221 pkey = X509_get_pubkey(s->session->peer);
226 * If the public key in the certificate is shorter than or equal to the
227 * maximum export strength then a temporary RSA key is not allowed
229 if (EVP_PKEY_bits(pkey)
230 <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
242 * ossl_statem_client_read_transition() encapsulates the logic for the allowed
243 * handshake state transitions when the client is reading messages from the
244 * server. The message type that the server has sent is provided in |mt|. The
245 * current state is in |s->statem.hand_state|.
248 * 1: Success (transition allowed)
249 * 0: Error (transition not allowed)
251 int ossl_statem_client_read_transition(SSL *s, int mt)
253 OSSL_STATEM *st = &s->statem;
256 switch(st->hand_state) {
257 case TLS_ST_CW_CLNT_HELLO:
258 if (mt == SSL3_MT_SERVER_HELLO) {
259 st->hand_state = TLS_ST_CR_SRVR_HELLO;
263 if (SSL_IS_DTLS(s)) {
264 if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
265 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
271 case TLS_ST_CR_SRVR_HELLO:
273 if (s->tlsext_ticket_expected) {
274 if (mt == SSL3_MT_NEWSESSION_TICKET) {
275 st->hand_state = TLS_ST_CR_SESSION_TICKET;
278 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
279 st->hand_state = TLS_ST_CR_CHANGE;
283 if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
284 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
286 } else if (s->version >= TLS1_VERSION
287 && s->tls_session_secret_cb != NULL
288 && s->session->tlsext_tick != NULL
289 && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
291 * Normally, we can tell if the server is resuming the session
292 * from the session ID. EAP-FAST (RFC 4851), however, relies on
293 * the next server message after the ServerHello to determine if
294 * the server is resuming.
297 st->hand_state = TLS_ST_CR_CHANGE;
299 } else if (!(s->s3->tmp.new_cipher->algorithm_auth
300 & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
301 if (mt == SSL3_MT_CERTIFICATE) {
302 st->hand_state = TLS_ST_CR_CERT;
306 ske_expected = key_exchange_expected(s);
307 if (ske_expected < 0)
309 /* SKE is optional for some PSK ciphersuites */
311 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
312 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
313 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
314 st->hand_state = TLS_ST_CR_KEY_EXCH;
317 } else if (mt == SSL3_MT_CERTIFICATE_REQUEST
318 && cert_req_allowed(s)) {
319 st->hand_state = TLS_ST_CR_CERT_REQ;
321 } else if (mt == SSL3_MT_SERVER_DONE) {
322 st->hand_state = TLS_ST_CR_SRVR_DONE;
330 if (s->tlsext_status_expected) {
331 if (mt == SSL3_MT_CERTIFICATE_STATUS) {
332 st->hand_state = TLS_ST_CR_CERT_STATUS;
339 case TLS_ST_CR_CERT_STATUS:
340 ske_expected = key_exchange_expected(s);
341 if (ske_expected < 0)
343 /* SKE is optional for some PSK ciphersuites */
345 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
346 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
347 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
348 st->hand_state = TLS_ST_CR_KEY_EXCH;
355 case TLS_ST_CR_KEY_EXCH:
356 if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
357 if (cert_req_allowed(s)) {
358 st->hand_state = TLS_ST_CR_CERT_REQ;
365 case TLS_ST_CR_CERT_REQ:
366 if (mt == SSL3_MT_SERVER_DONE) {
367 st->hand_state = TLS_ST_CR_SRVR_DONE;
372 case TLS_ST_CW_FINISHED:
373 if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) {
374 st->hand_state = TLS_ST_CR_SESSION_TICKET;
376 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
377 st->hand_state = TLS_ST_CR_CHANGE;
382 case TLS_ST_CR_SESSION_TICKET:
383 if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
384 st->hand_state = TLS_ST_CR_CHANGE;
389 case TLS_ST_CR_CHANGE:
390 if (mt == SSL3_MT_FINISHED) {
391 st->hand_state = TLS_ST_CR_FINISHED;
400 /* No valid transition found */
405 * client_write_transition() works out what handshake state to move to next
406 * when the client is writing messages to be sent to the server.
408 WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
410 OSSL_STATEM *st = &s->statem;
412 switch(st->hand_state) {
414 /* Renegotiation - fall through */
416 st->hand_state = TLS_ST_CW_CLNT_HELLO;
417 return WRITE_TRAN_CONTINUE;
419 case TLS_ST_CW_CLNT_HELLO:
421 * No transition at the end of writing because we don't know what
424 return WRITE_TRAN_FINISHED;
426 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
427 st->hand_state = TLS_ST_CW_CLNT_HELLO;
428 return WRITE_TRAN_CONTINUE;
430 case TLS_ST_CR_SRVR_DONE:
431 if (s->s3->tmp.cert_req)
432 st->hand_state = TLS_ST_CW_CERT;
434 st->hand_state = TLS_ST_CW_KEY_EXCH;
435 return WRITE_TRAN_CONTINUE;
438 st->hand_state = TLS_ST_CW_KEY_EXCH;
439 return WRITE_TRAN_CONTINUE;
441 case TLS_ST_CW_KEY_EXCH:
443 * For TLS, cert_req is set to 2, so a cert chain of nothing is
444 * sent, but no verify packet is sent
447 * XXX: For now, we do not support client authentication in ECDH
448 * cipher suites with ECDH (rather than ECDSA) certificates. We
449 * need to skip the certificate verify message when client's
450 * ECDH public key is sent inside the client certificate.
452 if (s->s3->tmp.cert_req == 1) {
453 st->hand_state = TLS_ST_CW_CERT_VRFY;
455 st->hand_state = TLS_ST_CW_CHANGE;
457 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
458 st->hand_state = TLS_ST_CW_CHANGE;
460 return WRITE_TRAN_CONTINUE;
462 case TLS_ST_CW_CERT_VRFY:
463 st->hand_state = TLS_ST_CW_CHANGE;
464 return WRITE_TRAN_CONTINUE;
466 case TLS_ST_CW_CHANGE:
467 #if defined(OPENSSL_NO_NEXTPROTONEG)
468 st->hand_state = TLS_ST_CW_FINISHED;
470 if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
471 st->hand_state = TLS_ST_CW_NEXT_PROTO;
473 st->hand_state = TLS_ST_CW_FINISHED;
475 return WRITE_TRAN_CONTINUE;
477 #if !defined(OPENSSL_NO_NEXTPROTONEG)
478 case TLS_ST_CW_NEXT_PROTO:
479 st->hand_state = TLS_ST_CW_FINISHED;
480 return WRITE_TRAN_CONTINUE;
483 case TLS_ST_CW_FINISHED:
485 st->hand_state = TLS_ST_OK;
486 ossl_statem_set_in_init(s, 0);
487 return WRITE_TRAN_CONTINUE;
489 return WRITE_TRAN_FINISHED;
492 case TLS_ST_CR_FINISHED:
494 st->hand_state = TLS_ST_CW_CHANGE;
495 return WRITE_TRAN_CONTINUE;
497 st->hand_state = TLS_ST_OK;
498 ossl_statem_set_in_init(s, 0);
499 return WRITE_TRAN_CONTINUE;
503 /* Shouldn't happen */
504 return WRITE_TRAN_ERROR;
509 * Perform any pre work that needs to be done prior to sending a message from
510 * the client to the server.
512 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst)
514 OSSL_STATEM *st = &s->statem;
516 switch(st->hand_state) {
517 case TLS_ST_CW_CLNT_HELLO:
519 if (SSL_IS_DTLS(s)) {
520 /* every DTLS ClientHello resets Finished MAC */
521 ssl3_init_finished_mac(s);
526 return tls_prepare_client_certificate(s, wst);
528 case TLS_ST_CW_CHANGE:
529 if (SSL_IS_DTLS(s)) {
532 * We're into the last flight so we don't retransmit these
533 * messages unless we need to.
537 #ifndef OPENSSL_NO_SCTP
538 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
539 return dtls_wait_for_dry(s);
542 return WORK_FINISHED_CONTINUE;
545 return tls_finish_handshake(s, wst);
548 /* No pre work to be done */
552 return WORK_FINISHED_CONTINUE;
556 * Perform any work that needs to be done after sending a message from the
557 * client to the server.
559 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst)
561 OSSL_STATEM *st = &s->statem;
565 switch(st->hand_state) {
566 case TLS_ST_CW_CLNT_HELLO:
567 if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1)
569 #ifndef OPENSSL_NO_SCTP
570 /* Disable buffering for SCTP */
571 if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) {
574 * turn on buffering for the next lot of output
576 if (s->bbio != s->wbio)
577 s->wbio = BIO_push(s->bbio, s->wbio);
578 #ifndef OPENSSL_NO_SCTP
581 if (SSL_IS_DTLS(s)) {
582 /* Treat the next message as the first packet */
587 case TLS_ST_CW_KEY_EXCH:
588 if (tls_client_key_exchange_post_work(s) == 0)
592 case TLS_ST_CW_CHANGE:
593 s->session->cipher = s->s3->tmp.new_cipher;
594 #ifdef OPENSSL_NO_COMP
595 s->session->compress_meth = 0;
597 if (s->s3->tmp.new_compression == NULL)
598 s->session->compress_meth = 0;
600 s->session->compress_meth = s->s3->tmp.new_compression->id;
602 if (!s->method->ssl3_enc->setup_key_block(s))
605 if (!s->method->ssl3_enc->change_cipher_state(s,
606 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
609 if (SSL_IS_DTLS(s)) {
610 #ifndef OPENSSL_NO_SCTP
613 * Change to new shared key of SCTP-Auth, will be ignored if
616 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
621 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
625 case TLS_ST_CW_FINISHED:
626 #ifndef OPENSSL_NO_SCTP
627 if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
629 * Change to new shared key of SCTP-Auth, will be ignored if
632 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
636 if (statem_flush(s) != 1)
641 /* No post work to be done */
645 return WORK_FINISHED_CONTINUE;
649 * Construct a message to be sent from the client to the server.
651 * Valid return values are:
655 int ossl_statem_client_construct_message(SSL *s)
657 OSSL_STATEM *st = &s->statem;
659 switch(st->hand_state) {
660 case TLS_ST_CW_CLNT_HELLO:
661 return tls_construct_client_hello(s);
664 return tls_construct_client_certificate(s);
666 case TLS_ST_CW_KEY_EXCH:
667 return tls_construct_client_key_exchange(s);
669 case TLS_ST_CW_CERT_VRFY:
670 return tls_construct_client_verify(s);
672 case TLS_ST_CW_CHANGE:
674 return dtls_construct_change_cipher_spec(s);
676 return tls_construct_change_cipher_spec(s);
678 #if !defined(OPENSSL_NO_NEXTPROTONEG)
679 case TLS_ST_CW_NEXT_PROTO:
680 return tls_construct_next_proto(s);
682 case TLS_ST_CW_FINISHED:
683 return tls_construct_finished(s,
685 ssl3_enc->client_finished_label,
687 ssl3_enc->client_finished_label_len);
690 /* Shouldn't happen */
698 * Returns the maximum allowed length for the current message that we are
699 * reading. Excludes the message header.
701 unsigned long ossl_statem_client_max_message_size(SSL *s)
703 OSSL_STATEM *st = &s->statem;
705 switch(st->hand_state) {
706 case TLS_ST_CR_SRVR_HELLO:
707 return SERVER_HELLO_MAX_LENGTH;
709 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
710 return HELLO_VERIFY_REQUEST_MAX_LENGTH;
713 return s->max_cert_list;
715 case TLS_ST_CR_CERT_STATUS:
716 return SSL3_RT_MAX_PLAIN_LENGTH;
718 case TLS_ST_CR_KEY_EXCH:
719 return SERVER_KEY_EXCH_MAX_LENGTH;
721 case TLS_ST_CR_CERT_REQ:
722 return SSL3_RT_MAX_PLAIN_LENGTH;
724 case TLS_ST_CR_SRVR_DONE:
725 return SERVER_HELLO_DONE_MAX_LENGTH;
727 case TLS_ST_CR_CHANGE:
728 return CCS_MAX_LENGTH;
730 case TLS_ST_CR_SESSION_TICKET:
731 return SSL3_RT_MAX_PLAIN_LENGTH;
733 case TLS_ST_CR_FINISHED:
734 return FINISHED_MAX_LENGTH;
737 /* Shouldn't happen */
745 * Process a message that the client has been received from the server.
747 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
749 OSSL_STATEM *st = &s->statem;
751 switch(st->hand_state) {
752 case TLS_ST_CR_SRVR_HELLO:
753 return tls_process_server_hello(s, pkt);
755 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
756 return dtls_process_hello_verify(s, pkt);
759 return tls_process_server_certificate(s, pkt);
761 case TLS_ST_CR_CERT_STATUS:
762 return tls_process_cert_status(s, pkt);
764 case TLS_ST_CR_KEY_EXCH:
765 return tls_process_key_exchange(s, pkt);
767 case TLS_ST_CR_CERT_REQ:
768 return tls_process_certificate_request(s, pkt);
770 case TLS_ST_CR_SRVR_DONE:
771 return tls_process_server_done(s, pkt);
773 case TLS_ST_CR_CHANGE:
774 return tls_process_change_cipher_spec(s, pkt);
776 case TLS_ST_CR_SESSION_TICKET:
777 return tls_process_new_session_ticket(s, pkt);
779 case TLS_ST_CR_FINISHED:
780 return tls_process_finished(s, pkt);
783 /* Shouldn't happen */
787 return MSG_PROCESS_ERROR;
791 * Perform any further processing required following the receipt of a message
794 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
796 OSSL_STATEM *st = &s->statem;
798 switch(st->hand_state) {
799 #ifndef OPENSSL_NO_SCTP
800 case TLS_ST_CR_SRVR_DONE:
801 /* We only get here if we are using SCTP and we are renegotiating */
802 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
803 s->s3->in_read_app_data = 2;
804 s->rwstate = SSL_READING;
805 BIO_clear_retry_flags(SSL_get_rbio(s));
806 BIO_set_retry_read(SSL_get_rbio(s));
807 ossl_statem_set_sctp_read_sock(s, 1);
810 ossl_statem_set_sctp_read_sock(s, 0);
811 return WORK_FINISHED_STOP;
818 /* Shouldn't happen */
823 * Work out what version we should be using for the initial ClientHello if
824 * the version is currently set to (D)TLS_ANY_VERSION.
825 * Returns 1 on success
828 static int ssl_set_version(SSL *s)
830 unsigned long mask, options = s->options;
832 if (s->method->version == TLS_ANY_VERSION) {
834 * SSL_OP_NO_X disables all protocols above X *if* there are
835 * some protocols below X enabled. This is required in order
836 * to maintain "version capability" vector contiguous. So
837 * that if application wants to disable TLS1.0 in favour of
838 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
839 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3.
841 mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
842 #if !defined(OPENSSL_NO_SSL3)
846 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
847 if (options & SSL_OP_NO_TLSv1_2) {
848 if ((options & mask) != mask) {
849 s->version = TLS1_1_VERSION;
851 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
855 s->version = TLS1_2_VERSION;
858 if ((options & mask) == mask) {
859 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
862 s->version = TLS1_1_VERSION;
865 mask &= ~SSL_OP_NO_TLSv1_1;
866 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
867 s->version = TLS1_VERSION;
868 mask &= ~SSL_OP_NO_TLSv1;
869 #if !defined(OPENSSL_NO_SSL3)
870 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
871 s->version = SSL3_VERSION;
874 if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) {
875 SSLerr(SSL_F_SSL_SET_VERSION,
876 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
880 if (s->version == SSL3_VERSION && FIPS_mode()) {
881 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
885 } else if (s->method->version == DTLS_ANY_VERSION) {
886 /* Determine which DTLS version to use */
887 /* If DTLS 1.2 disabled correct the version number */
888 if (options & SSL_OP_NO_DTLSv1_2) {
889 if (tls1_suiteb(s)) {
890 SSLerr(SSL_F_SSL_SET_VERSION,
891 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
895 * Disabling all versions is silly: return an error.
897 if (options & SSL_OP_NO_DTLSv1) {
898 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION);
902 * Update method so we don't use any DTLS 1.2 features.
904 s->method = DTLSv1_client_method();
905 s->version = DTLS1_VERSION;
908 * We only support one version: update method
910 if (options & SSL_OP_NO_DTLSv1)
911 s->method = DTLSv1_2_client_method();
912 s->version = DTLS1_2_VERSION;
916 s->client_version = s->version;
921 int tls_construct_client_hello(SSL *s)
924 unsigned char *p, *d;
928 #ifndef OPENSSL_NO_COMP
932 SSL_SESSION *sess = s->session;
934 buf = (unsigned char *)s->init_buf->data;
936 /* Work out what SSL/TLS/DTLS version to use */
937 if (ssl_set_version(s) == 0)
940 if ((sess == NULL) || (sess->ssl_version != s->version) ||
942 * In the case of EAP-FAST, we can have a pre-shared
943 * "ticket" without a session ID.
945 (!sess->session_id_length && !sess->tlsext_tick) ||
946 (sess->not_resumable)) {
947 if (!ssl_get_new_session(s, 0))
950 /* else use the pre-loaded session */
952 p = s->s3->client_random;
955 * for DTLS if client_random is initialized, reuse it, we are
956 * required to use same upon reply to HelloVerify
958 if (SSL_IS_DTLS(s)) {
961 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
970 if (i && ssl_fill_hello_random(s, 0, p,
971 sizeof(s->s3->client_random)) <= 0)
974 /* Do the message type and length last */
975 d = p = ssl_handshake_start(s);
978 * version indicates the negotiated version: for example from
979 * an SSLv2/v3 compatible client hello). The client_version
980 * field is the maximum version we permit and it is also
981 * used in RSA encrypted premaster secrets. Some servers can
982 * choke if we initially report a higher version then
983 * renegotiate to a lower one in the premaster secret. This
984 * didn't happen with TLS 1.0 as most servers supported it
985 * but it can with TLS 1.1 or later if the server only supports
988 * Possible scenario with previous logic:
989 * 1. Client hello indicates TLS 1.2
990 * 2. Server hello says TLS 1.0
991 * 3. RSA encrypted premaster secret uses 1.2.
992 * 4. Handhaked proceeds using TLS 1.0.
993 * 5. Server sends hello request to renegotiate.
994 * 6. Client hello indicates TLS v1.0 as we now
995 * know that is maximum server supports.
996 * 7. Server chokes on RSA encrypted premaster secret
997 * containing version 1.0.
999 * For interoperability it should be OK to always use the
1000 * maximum version we support in client hello and then rely
1001 * on the checking of version to ensure the servers isn't
1002 * being inconsistent: for example initially negotiating with
1003 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
1004 * client_version in client hello and not resetting it to
1005 * the negotiated version.
1007 *(p++) = s->client_version >> 8;
1008 *(p++) = s->client_version & 0xff;
1011 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
1012 p += SSL3_RANDOM_SIZE;
1018 i = s->session->session_id_length;
1021 if (i > (int)sizeof(s->session->session_id)) {
1022 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
1025 memcpy(p, s->session->session_id, i);
1029 /* cookie stuff for DTLS */
1030 if (SSL_IS_DTLS(s)) {
1031 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
1032 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
1035 *(p++) = s->d1->cookie_len;
1036 memcpy(p, s->d1->cookie, s->d1->cookie_len);
1037 p += s->d1->cookie_len;
1040 /* Ciphers supported */
1041 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
1043 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
1046 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
1048 * Some servers hang if client hello > 256 bytes as hack workaround
1049 * chop number of supported ciphers to keep it well below this if we
1052 if (TLS1_get_version(s) >= TLS1_2_VERSION
1053 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
1054 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
1060 #ifdef OPENSSL_NO_COMP
1064 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
1067 j = sk_SSL_COMP_num(s->ctx->comp_methods);
1069 for (i = 0; i < j; i++) {
1070 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
1074 *(p++) = 0; /* Add the NULL method */
1076 /* TLS extensions */
1077 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
1078 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
1082 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
1084 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1085 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
1090 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
1091 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1092 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
1098 ossl_statem_set_error(s);
1102 MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
1105 unsigned int cookie_len;
1108 if (!PACKET_forward(pkt, 2)
1109 || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
1110 al = SSL_AD_DECODE_ERROR;
1111 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
1115 cookie_len = PACKET_remaining(&cookiepkt);
1116 if (cookie_len > sizeof(s->d1->cookie)) {
1117 al = SSL_AD_ILLEGAL_PARAMETER;
1118 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
1122 if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
1123 al = SSL_AD_DECODE_ERROR;
1124 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
1127 s->d1->cookie_len = cookie_len;
1129 return MSG_PROCESS_FINISHED_READING;
1131 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1132 ossl_statem_set_error(s);
1133 return MSG_PROCESS_ERROR;
1136 MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
1138 STACK_OF(SSL_CIPHER) *sk;
1139 const SSL_CIPHER *c;
1141 size_t session_id_len;
1142 unsigned char *cipherchars;
1143 int i, al = SSL_AD_INTERNAL_ERROR;
1144 unsigned int compression;
1145 #ifndef OPENSSL_NO_COMP
1149 if (s->method->version == TLS_ANY_VERSION) {
1150 unsigned int sversion;
1152 if (!PACKET_get_net_2(pkt, &sversion)) {
1153 al = SSL_AD_DECODE_ERROR;
1154 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1158 #if TLS_MAX_VERSION != TLS1_2_VERSION
1159 #error Code needs updating for new TLS version
1161 #ifndef OPENSSL_NO_SSL3
1162 if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) {
1164 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1165 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1166 al = SSL_AD_PROTOCOL_VERSION;
1169 s->method = SSLv3_client_method();
1172 if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) {
1173 s->method = TLSv1_client_method();
1174 } else if ((sversion == TLS1_1_VERSION) &&
1175 !(s->options & SSL_OP_NO_TLSv1_1)) {
1176 s->method = TLSv1_1_client_method();
1177 } else if ((sversion == TLS1_2_VERSION) &&
1178 !(s->options & SSL_OP_NO_TLSv1_2)) {
1179 s->method = TLSv1_2_client_method();
1181 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
1182 al = SSL_AD_PROTOCOL_VERSION;
1185 s->session->ssl_version = s->version = s->method->version;
1187 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
1188 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW);
1189 al = SSL_AD_PROTOCOL_VERSION;
1192 } else if (s->method->version == DTLS_ANY_VERSION) {
1193 /* Work out correct protocol version to use */
1194 unsigned int hversion;
1197 if (!PACKET_get_net_2(pkt, &hversion)) {
1198 al = SSL_AD_DECODE_ERROR;
1199 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1203 options = s->options;
1204 if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2))
1205 s->method = DTLSv1_2_client_method();
1206 else if (tls1_suiteb(s)) {
1207 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1208 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1209 s->version = hversion;
1210 al = SSL_AD_PROTOCOL_VERSION;
1212 } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1))
1213 s->method = DTLSv1_client_method();
1215 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1216 s->version = hversion;
1217 al = SSL_AD_PROTOCOL_VERSION;
1220 s->session->ssl_version = s->version = s->method->version;
1222 unsigned char *vers;
1224 if (!PACKET_get_bytes(pkt, &vers, 2)) {
1225 al = SSL_AD_DECODE_ERROR;
1226 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1229 if ((vers[0] != (s->version >> 8))
1230 || (vers[1] != (s->version & 0xff))) {
1231 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1232 s->version = (s->version & 0xff00) | vers[1];
1233 al = SSL_AD_PROTOCOL_VERSION;
1238 /* load the server hello data */
1239 /* load the server random */
1240 if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
1241 al = SSL_AD_DECODE_ERROR;
1242 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1248 /* Get the session-id. */
1249 if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
1250 al = SSL_AD_DECODE_ERROR;
1251 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1254 session_id_len = PACKET_remaining(&session_id);
1255 if (session_id_len > sizeof s->session->session_id
1256 || session_id_len > SSL3_SESSION_ID_SIZE) {
1257 al = SSL_AD_ILLEGAL_PARAMETER;
1258 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
1262 if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
1263 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1264 al = SSL_AD_DECODE_ERROR;
1269 * Check if we can resume the session based on external pre-shared secret.
1270 * EAP-FAST (RFC 4851) supports two types of session resumption.
1271 * Resumption based on server-side state works with session IDs.
1272 * Resumption based on pre-shared Protected Access Credentials (PACs)
1273 * works by overriding the SessionTicket extension at the application
1274 * layer, and does not send a session ID. (We do not know whether EAP-FAST
1275 * servers would honour the session ID.) Therefore, the session ID alone
1276 * is not a reliable indicator of session resumption, so we first check if
1277 * we can resume, and later peek at the next handshake message to see if the
1278 * server wants to resume.
1280 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
1281 s->session->tlsext_tick) {
1282 SSL_CIPHER *pref_cipher = NULL;
1283 s->session->master_key_length = sizeof(s->session->master_key);
1284 if (s->tls_session_secret_cb(s, s->session->master_key,
1285 &s->session->master_key_length,
1287 s->tls_session_secret_cb_arg)) {
1288 s->session->cipher = pref_cipher ?
1289 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
1291 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1292 al = SSL_AD_INTERNAL_ERROR;
1297 if (session_id_len != 0 && session_id_len == s->session->session_id_length
1298 && memcmp(PACKET_data(&session_id), s->session->session_id,
1299 session_id_len) == 0) {
1300 if (s->sid_ctx_length != s->session->sid_ctx_length
1301 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
1302 /* actually a client application bug */
1303 al = SSL_AD_ILLEGAL_PARAMETER;
1304 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1305 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1311 * If we were trying for session-id reuse but the server
1312 * didn't echo the ID, make a new SSL_SESSION.
1313 * In the case of EAP-FAST and PAC, we do not send a session ID,
1314 * so the PAC-based session secret is always preserved. It'll be
1315 * overwritten if the server refuses resumption.
1317 if (s->session->session_id_length > 0) {
1318 if (!ssl_get_new_session(s, 0)) {
1323 s->session->session_id_length = session_id_len;
1324 /* session_id_len could be 0 */
1325 memcpy(s->session->session_id, PACKET_data(&session_id),
1329 c = ssl_get_cipher_by_char(s, cipherchars);
1331 /* unknown cipher */
1332 al = SSL_AD_ILLEGAL_PARAMETER;
1333 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1336 /* Set version disabled mask now we know version */
1337 if (!SSL_USE_TLS1_2_CIPHERS(s))
1338 s->s3->tmp.mask_ssl = SSL_TLSV1_2;
1340 s->s3->tmp.mask_ssl = 0;
1341 /* Skip TLS v1.0 ciphersuites if SSLv3 */
1342 if ((c->algorithm_ssl & SSL_TLSV1) && s->version == SSL3_VERSION)
1343 s->s3->tmp.mask_ssl |= SSL_TLSV1;
1345 * If it is a disabled cipher we didn't send it in client hello, so
1348 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1349 al = SSL_AD_ILLEGAL_PARAMETER;
1350 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1354 sk = ssl_get_ciphers_by_id(s);
1355 i = sk_SSL_CIPHER_find(sk, c);
1357 /* we did not say we would use this cipher */
1358 al = SSL_AD_ILLEGAL_PARAMETER;
1359 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1364 * Depending on the session caching (internal/external), the cipher
1365 * and/or cipher_id values may not be set. Make sure that cipher_id is
1366 * set and use it for comparison.
1368 if (s->session->cipher)
1369 s->session->cipher_id = s->session->cipher->id;
1370 if (s->hit && (s->session->cipher_id != c->id)) {
1371 al = SSL_AD_ILLEGAL_PARAMETER;
1372 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1373 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1376 s->s3->tmp.new_cipher = c;
1377 /* lets get the compression algorithm */
1379 if (!PACKET_get_1(pkt, &compression)) {
1380 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1381 al = SSL_AD_DECODE_ERROR;
1384 #ifdef OPENSSL_NO_COMP
1385 if (compression != 0) {
1386 al = SSL_AD_ILLEGAL_PARAMETER;
1387 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1388 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1392 * If compression is disabled we'd better not try to resume a session
1393 * using compression.
1395 if (s->session->compress_meth != 0) {
1396 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1400 if (s->hit && compression != s->session->compress_meth) {
1401 al = SSL_AD_ILLEGAL_PARAMETER;
1402 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1403 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1406 if (compression == 0)
1408 else if (!ssl_allow_compression(s)) {
1409 al = SSL_AD_ILLEGAL_PARAMETER;
1410 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1413 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1416 if (compression != 0 && comp == NULL) {
1417 al = SSL_AD_ILLEGAL_PARAMETER;
1418 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1419 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1422 s->s3->tmp.new_compression = comp;
1426 /* TLS extensions */
1427 if (!ssl_parse_serverhello_tlsext(s, pkt)) {
1428 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1432 if (PACKET_remaining(pkt) != 0) {
1433 /* wrong packet length */
1434 al = SSL_AD_DECODE_ERROR;
1435 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1439 #ifndef OPENSSL_NO_SCTP
1440 if (SSL_IS_DTLS(s) && s->hit) {
1441 unsigned char sctpauthkey[64];
1442 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
1445 * Add new shared key for SCTP-Auth, will be ignored if
1448 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
1449 sizeof(DTLS1_SCTP_AUTH_LABEL));
1451 if (SSL_export_keying_material(s, sctpauthkey,
1452 sizeof(sctpauthkey),
1454 sizeof(labelbuffer), NULL, 0,
1458 BIO_ctrl(SSL_get_wbio(s),
1459 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
1460 sizeof(sctpauthkey), sctpauthkey);
1464 return MSG_PROCESS_CONTINUE_READING;
1466 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1468 ossl_statem_set_error(s);
1469 return MSG_PROCESS_ERROR;
1472 MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
1474 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
1475 unsigned long cert_list_len, cert_len;
1477 unsigned char *certstart, *certbytes;
1478 STACK_OF(X509) *sk = NULL;
1479 EVP_PKEY *pkey = NULL;
1481 if ((sk = sk_X509_new_null()) == NULL) {
1482 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1486 if (!PACKET_get_net_3(pkt, &cert_list_len)
1487 || PACKET_remaining(pkt) != cert_list_len) {
1488 al = SSL_AD_DECODE_ERROR;
1489 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1492 while (PACKET_remaining(pkt)) {
1493 if (!PACKET_get_net_3(pkt, &cert_len)
1494 || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
1495 al = SSL_AD_DECODE_ERROR;
1496 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1497 SSL_R_CERT_LENGTH_MISMATCH);
1501 certstart = certbytes;
1502 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1504 al = SSL_AD_BAD_CERTIFICATE;
1505 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1508 if (certbytes != (certstart + cert_len)) {
1509 al = SSL_AD_DECODE_ERROR;
1510 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1511 SSL_R_CERT_LENGTH_MISMATCH);
1514 if (!sk_X509_push(sk, x)) {
1515 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1521 i = ssl_verify_cert_chain(s, sk);
1522 if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
1523 al = ssl_verify_alarm_type(s->verify_result);
1524 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1525 SSL_R_CERTIFICATE_VERIFY_FAILED);
1528 ERR_clear_error(); /* but we keep s->verify_result */
1530 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
1531 al = SSL_AD_HANDSHAKE_FAILURE;
1535 s->session->peer_chain = sk;
1537 * Inconsistency alert: cert_chain does include the peer's certificate,
1538 * which we don't include in s3_srvr.c
1540 x = sk_X509_value(sk, 0);
1543 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1546 pkey = X509_get_pubkey(x);
1548 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1551 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1552 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1556 i = ssl_cert_type(x, pkey);
1560 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1561 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1565 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1566 if (exp_idx >= 0 && i != exp_idx
1567 && (exp_idx != SSL_PKEY_GOST_EC ||
1568 (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
1569 && i != SSL_PKEY_GOST01))) {
1571 al = SSL_AD_ILLEGAL_PARAMETER;
1572 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1573 SSL_R_WRONG_CERTIFICATE_TYPE);
1576 s->session->peer_type = i;
1578 X509_free(s->session->peer);
1580 s->session->peer = x;
1581 s->session->verify_result = s->verify_result;
1584 ret = MSG_PROCESS_CONTINUE_READING;
1588 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1590 ossl_statem_set_error(s);
1592 EVP_PKEY_free(pkey);
1594 sk_X509_pop_free(sk, X509_free);
1598 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1603 EVP_PKEY *pkey = NULL;
1604 const EVP_MD *md = NULL;
1605 #ifndef OPENSSL_NO_RSA
1608 #ifndef OPENSSL_NO_DH
1611 #ifndef OPENSSL_NO_EC
1612 EC_KEY *ecdh = NULL;
1613 BN_CTX *bn_ctx = NULL;
1614 EC_POINT *srvr_ecpoint = NULL;
1617 PACKET save_param_start, signature;
1619 EVP_MD_CTX_init(&md_ctx);
1621 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1623 save_param_start = *pkt;
1625 #ifndef OPENSSL_NO_RSA
1626 RSA_free(s->s3->peer_rsa_tmp);
1627 s->s3->peer_rsa_tmp = NULL;
1629 #ifndef OPENSSL_NO_DH
1630 DH_free(s->s3->peer_dh_tmp);
1631 s->s3->peer_dh_tmp = NULL;
1633 #ifndef OPENSSL_NO_EC
1634 EC_KEY_free(s->s3->peer_ecdh_tmp);
1635 s->s3->peer_ecdh_tmp = NULL;
1638 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1640 al = SSL_AD_DECODE_ERROR;
1642 #ifndef OPENSSL_NO_PSK
1643 /* PSK ciphersuites are preceded by an identity hint */
1644 if (alg_k & SSL_PSK) {
1645 PACKET psk_identity_hint;
1646 if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
1647 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1652 * Store PSK identity hint for later use, hint is used in
1653 * ssl3_send_client_key_exchange. Assume that the maximum length of
1654 * a PSK identity hint can be as long as the maximum length of a PSK
1657 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1658 al = SSL_AD_HANDSHAKE_FAILURE;
1659 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
1663 if (PACKET_remaining(&psk_identity_hint) == 0) {
1664 OPENSSL_free(s->session->psk_identity_hint);
1665 s->session->psk_identity_hint = NULL;
1666 } else if (!PACKET_strndup(&psk_identity_hint,
1667 &s->session->psk_identity_hint)) {
1668 al = SSL_AD_INTERNAL_ERROR;
1673 /* Nothing else to do for plain PSK or RSAPSK */
1674 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1676 #endif /* !OPENSSL_NO_PSK */
1677 #ifndef OPENSSL_NO_SRP
1678 if (alg_k & SSL_kSRP) {
1679 PACKET prime, generator, salt, server_pub;
1680 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1681 || !PACKET_get_length_prefixed_2(pkt, &generator)
1682 || !PACKET_get_length_prefixed_1(pkt, &salt)
1683 || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
1684 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1689 BN_bin2bn(PACKET_data(&prime),
1690 PACKET_remaining(&prime), NULL)) == NULL
1692 BN_bin2bn(PACKET_data(&generator),
1693 PACKET_remaining(&generator), NULL)) == NULL
1695 BN_bin2bn(PACKET_data(&salt),
1696 PACKET_remaining(&salt), NULL)) == NULL
1698 BN_bin2bn(PACKET_data(&server_pub),
1699 PACKET_remaining(&server_pub), NULL)) == NULL) {
1700 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
1704 if (!srp_verify_server_param(s, &al)) {
1705 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
1709 /* We must check if there is a certificate */
1710 if (alg_a & (SSL_aRSA|SSL_aDSS))
1711 pkey = X509_get_pubkey(s->session->peer);
1713 #endif /* !OPENSSL_NO_SRP */
1714 #ifndef OPENSSL_NO_RSA
1715 if (alg_k & SSL_kRSA) {
1717 /* Temporary RSA keys only allowed in export ciphersuites */
1718 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
1719 al = SSL_AD_UNEXPECTED_MESSAGE;
1720 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1724 if (!PACKET_get_length_prefixed_2(pkt, &mod)
1725 || !PACKET_get_length_prefixed_2(pkt, &exp)) {
1726 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1730 if ((rsa = RSA_new()) == NULL) {
1731 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1735 if ((rsa->n = BN_bin2bn(PACKET_data(&mod), PACKET_remaining(&mod),
1737 || (rsa->e = BN_bin2bn(PACKET_data(&exp), PACKET_remaining(&exp),
1739 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
1743 /* this should be because we are using an export cipher */
1744 if (alg_a & SSL_aRSA)
1745 pkey = X509_get_pubkey(s->session->peer);
1747 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1751 s->s3->peer_rsa_tmp = rsa;
1754 #else /* OPENSSL_NO_RSA */
1757 #ifndef OPENSSL_NO_DH
1758 else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1759 PACKET prime, generator, pub_key;
1761 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1762 || !PACKET_get_length_prefixed_2(pkt, &generator)
1763 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1764 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1768 if ((dh = DH_new()) == NULL) {
1769 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_DH_LIB);
1773 if ((dh->p = BN_bin2bn(PACKET_data(&prime),
1774 PACKET_remaining(&prime), NULL)) == NULL
1775 || (dh->g = BN_bin2bn(PACKET_data(&generator),
1776 PACKET_remaining(&generator), NULL)) == NULL
1778 BN_bin2bn(PACKET_data(&pub_key),
1779 PACKET_remaining(&pub_key), NULL)) == NULL) {
1780 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
1784 if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) {
1785 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE);
1789 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1790 al = SSL_AD_HANDSHAKE_FAILURE;
1791 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
1794 if (alg_a & (SSL_aRSA|SSL_aDSS))
1795 pkey = X509_get_pubkey(s->session->peer);
1796 /* else anonymous DH, so no certificate or pkey. */
1798 s->s3->peer_dh_tmp = dh;
1801 #endif /* !OPENSSL_NO_DH */
1803 #ifndef OPENSSL_NO_EC
1804 else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1806 const EC_GROUP *group;
1808 unsigned char *ecparams;
1810 if ((ecdh = EC_KEY_new()) == NULL) {
1811 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1816 * Extract elliptic curve parameters and the server's ephemeral ECDH
1817 * public key. For now we only support named (not generic) curves and
1818 * ECParameters in this case is just three bytes.
1820 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1821 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1825 * Check curve is one of our preferences, if not server has sent an
1826 * invalid curve. ECParameters is 3 bytes.
1828 if (!tls1_check_curve(s, ecparams, 3)) {
1829 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
1833 if ((curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2))) == 0) {
1834 al = SSL_AD_INTERNAL_ERROR;
1835 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1836 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1840 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1841 if (ngroup == NULL) {
1842 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB);
1845 if (EC_KEY_set_group(ecdh, ngroup) == 0) {
1846 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB);
1849 EC_GROUP_free(ngroup);
1851 group = EC_KEY_get0_group(ecdh);
1853 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1854 (EC_GROUP_get_degree(group) > 163)) {
1855 al = SSL_AD_EXPORT_RESTRICTION;
1856 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1857 SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1861 /* Next, get the encoded ECPoint */
1862 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1863 ((bn_ctx = BN_CTX_new()) == NULL)) {
1864 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1868 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1869 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1873 if (EC_POINT_oct2point(group, srvr_ecpoint, PACKET_data(&encoded_pt),
1874 PACKET_remaining(&encoded_pt), bn_ctx) == 0) {
1875 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1880 * The ECC/TLS specification does not mention the use of DSA to sign
1881 * ECParameters in the server key exchange message. We do support RSA
1885 # ifndef OPENSSL_NO_RSA
1886 else if (alg_a & SSL_aRSA)
1887 pkey = X509_get_pubkey(s->session->peer);
1889 # ifndef OPENSSL_NO_EC
1890 else if (alg_a & SSL_aECDSA)
1891 pkey = X509_get_pubkey(s->session->peer);
1893 /* else anonymous ECDH, so no certificate or pkey. */
1894 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1895 s->s3->peer_ecdh_tmp = ecdh;
1897 BN_CTX_free(bn_ctx);
1899 EC_POINT_free(srvr_ecpoint);
1900 srvr_ecpoint = NULL;
1902 al = SSL_AD_UNEXPECTED_MESSAGE;
1903 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1906 #endif /* !OPENSSL_NO_EC */
1908 /* if it was signed, check the signature */
1912 * |pkt| now points to the beginning of the signature, so the difference
1913 * equals the length of the parameters.
1915 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1916 PACKET_remaining(&save_param_start) -
1917 PACKET_remaining(pkt))) {
1918 al = SSL_AD_INTERNAL_ERROR;
1919 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1923 if (SSL_USE_SIGALGS(s)) {
1924 unsigned char *sigalgs;
1926 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1927 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1930 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1937 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1939 } else if (pkey->type == EVP_PKEY_RSA) {
1940 md = EVP_md5_sha1();
1945 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1946 || PACKET_remaining(pkt) != 0) {
1947 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1950 j = EVP_PKEY_size(pkey);
1952 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1957 * Check signature length
1959 if (PACKET_remaining(&signature) > (size_t)j) {
1960 /* wrong packet length */
1961 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1964 if (EVP_VerifyInit_ex(&md_ctx, md, NULL) <= 0
1965 || EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]),
1966 SSL3_RANDOM_SIZE) <= 0
1967 || EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]),
1968 SSL3_RANDOM_SIZE) <= 0
1969 || EVP_VerifyUpdate(&md_ctx, PACKET_data(¶ms),
1970 PACKET_remaining(¶ms)) <= 0) {
1971 al = SSL_AD_INTERNAL_ERROR;
1972 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1975 if (EVP_VerifyFinal(&md_ctx, PACKET_data(&signature),
1976 PACKET_remaining(&signature), pkey) <= 0) {
1978 al = SSL_AD_DECRYPT_ERROR;
1979 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1983 /* aNULL, aSRP or PSK do not need public keys */
1984 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) {
1985 /* Might be wrong key type, check it */
1986 if (ssl3_check_cert_and_algorithm(s))
1987 /* Otherwise this shouldn't happen */
1988 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1991 /* still data left over */
1992 if (PACKET_remaining(pkt) != 0) {
1993 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1997 EVP_PKEY_free(pkey);
1998 EVP_MD_CTX_cleanup(&md_ctx);
1999 return MSG_PROCESS_CONTINUE_READING;
2001 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2003 EVP_PKEY_free(pkey);
2004 #ifndef OPENSSL_NO_RSA
2007 #ifndef OPENSSL_NO_DH
2010 #ifndef OPENSSL_NO_EC
2011 BN_CTX_free(bn_ctx);
2012 EC_POINT_free(srvr_ecpoint);
2015 EVP_MD_CTX_cleanup(&md_ctx);
2016 ossl_statem_set_error(s);
2017 return MSG_PROCESS_ERROR;
2020 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
2022 int ret = MSG_PROCESS_ERROR;
2023 unsigned int list_len, ctype_num, i, name_len;
2024 X509_NAME *xn = NULL;
2025 unsigned char *data;
2026 unsigned char *namestart, *namebytes;
2027 STACK_OF(X509_NAME) *ca_sk = NULL;
2029 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
2030 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2034 /* get the certificate types */
2035 if (!PACKET_get_1(pkt, &ctype_num)
2036 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
2037 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2038 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
2041 OPENSSL_free(s->cert->ctypes);
2042 s->cert->ctypes = NULL;
2043 if (ctype_num > SSL3_CT_NUMBER) {
2044 /* If we exceed static buffer copy all to cert structure */
2045 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2046 if (s->cert->ctypes == NULL) {
2047 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2050 memcpy(s->cert->ctypes, data, ctype_num);
2051 s->cert->ctype_num = (size_t)ctype_num;
2052 ctype_num = SSL3_CT_NUMBER;
2054 for (i = 0; i < ctype_num; i++)
2055 s->s3->tmp.ctype[i] = data[i];
2057 if (SSL_USE_SIGALGS(s)) {
2058 if (!PACKET_get_net_2(pkt, &list_len)
2059 || !PACKET_get_bytes(pkt, &data, list_len)) {
2060 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2061 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
2062 SSL_R_LENGTH_MISMATCH);
2066 /* Clear certificate digests and validity flags */
2067 for (i = 0; i < SSL_PKEY_NUM; i++) {
2068 s->s3->tmp.md[i] = NULL;
2069 s->s3->tmp.valid_flags[i] = 0;
2071 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
2072 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2073 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
2074 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2077 if (!tls1_process_sigalgs(s)) {
2078 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2079 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2083 ssl_set_default_md(s);
2086 /* get the CA RDNs */
2087 if (!PACKET_get_net_2(pkt, &list_len)
2088 || PACKET_remaining(pkt) != list_len) {
2089 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2090 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
2094 while (PACKET_remaining(pkt)) {
2095 if (!PACKET_get_net_2(pkt, &name_len)
2096 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
2097 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2098 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
2099 SSL_R_LENGTH_MISMATCH);
2103 namestart = namebytes;
2105 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
2106 name_len)) == NULL) {
2107 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2108 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
2112 if (namebytes != (namestart + name_len)) {
2113 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2114 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
2115 SSL_R_CA_DN_LENGTH_MISMATCH);
2118 if (!sk_X509_NAME_push(ca_sk, xn)) {
2119 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2124 /* we should setup a certificate to return.... */
2125 s->s3->tmp.cert_req = 1;
2126 s->s3->tmp.ctype_num = ctype_num;
2127 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
2128 s->s3->tmp.ca_names = ca_sk;
2131 ret = MSG_PROCESS_CONTINUE_READING;
2134 ossl_statem_set_error(s);
2136 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
2140 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
2142 return (X509_NAME_cmp(*a, *b));
2145 MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
2148 unsigned int ticklen;
2149 unsigned long ticket_lifetime_hint;
2151 if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
2152 || !PACKET_get_net_2(pkt, &ticklen)
2153 || PACKET_remaining(pkt) != ticklen) {
2154 al = SSL_AD_DECODE_ERROR;
2155 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2159 /* Server is allowed to change its mind and send an empty ticket. */
2161 return MSG_PROCESS_CONTINUE_READING;
2163 if (s->session->session_id_length > 0) {
2164 int i = s->session_ctx->session_cache_mode;
2165 SSL_SESSION *new_sess;
2167 * We reused an existing session, so we need to replace it with a new
2170 if (i & SSL_SESS_CACHE_CLIENT) {
2172 * Remove the old session from the cache
2174 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
2175 if (s->session_ctx->remove_session_cb != NULL)
2176 s->session_ctx->remove_session_cb(s->session_ctx,
2179 /* We carry on if this fails */
2180 SSL_CTX_remove_session(s->session_ctx, s->session);
2184 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
2185 al = SSL_AD_INTERNAL_ERROR;
2186 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2190 SSL_SESSION_free(s->session);
2191 s->session = new_sess;
2194 OPENSSL_free(s->session->tlsext_tick);
2195 s->session->tlsext_ticklen = 0;
2197 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2198 if (s->session->tlsext_tick == NULL) {
2199 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2202 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
2203 al = SSL_AD_DECODE_ERROR;
2204 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2208 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
2209 s->session->tlsext_ticklen = ticklen;
2211 * There are two ways to detect a resumed ticket session. One is to set
2212 * an appropriate session ID and then the server must return a match in
2213 * ServerHello. This allows the normal client session ID matching to work
2214 * and we know much earlier that the ticket has been accepted. The
2215 * other way is to set zero length session ID when the ticket is
2216 * presented and rely on the handshake to determine session resumption.
2217 * We choose the former approach because this fits in with assumptions
2218 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
2219 * SHA256 is disabled) hash of the ticket.
2221 EVP_Digest(s->session->tlsext_tick, ticklen,
2222 s->session->session_id, &s->session->session_id_length,
2223 EVP_sha256(), NULL);
2224 return MSG_PROCESS_CONTINUE_READING;
2226 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2228 ossl_statem_set_error(s);
2229 return MSG_PROCESS_ERROR;
2232 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
2235 unsigned long resplen;
2238 if (!PACKET_get_1(pkt, &type)
2239 || type != TLSEXT_STATUSTYPE_ocsp) {
2240 al = SSL_AD_DECODE_ERROR;
2241 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
2244 if (!PACKET_get_net_3(pkt, &resplen)
2245 || PACKET_remaining(pkt) != resplen) {
2246 al = SSL_AD_DECODE_ERROR;
2247 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2250 OPENSSL_free(s->tlsext_ocsp_resp);
2251 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
2252 if (s->tlsext_ocsp_resp == NULL) {
2253 al = SSL_AD_INTERNAL_ERROR;
2254 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2257 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
2258 al = SSL_AD_DECODE_ERROR;
2259 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2262 s->tlsext_ocsp_resplen = resplen;
2263 if (s->ctx->tlsext_status_cb) {
2265 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2267 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2268 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE);
2272 al = SSL_AD_INTERNAL_ERROR;
2273 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2277 return MSG_PROCESS_CONTINUE_READING;
2279 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2280 ossl_statem_set_error(s);
2281 return MSG_PROCESS_ERROR;
2284 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
2286 if (PACKET_remaining(pkt) > 0) {
2287 /* should contain no data */
2288 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2289 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2290 ossl_statem_set_error(s);
2291 return MSG_PROCESS_ERROR;
2294 #ifndef OPENSSL_NO_SRP
2295 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2296 if (SRP_Calc_A_param(s) <= 0) {
2297 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2298 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2299 ossl_statem_set_error(s);
2300 return MSG_PROCESS_ERROR;
2306 * at this point we check that we have the required stuff from
2309 if (!ssl3_check_cert_and_algorithm(s)) {
2310 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2311 ossl_statem_set_error(s);
2312 return MSG_PROCESS_ERROR;
2315 #ifndef OPENSSL_NO_SCTP
2316 /* Only applies to renegotiation */
2317 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2318 && s->renegotiate != 0)
2319 return MSG_PROCESS_CONTINUE_PROCESSING;
2322 return MSG_PROCESS_FINISHED_READING;
2325 int tls_construct_client_key_exchange(SSL *s)
2329 #ifndef OPENSSL_NO_PSK
2330 size_t pskhdrlen = 0;
2332 unsigned long alg_k;
2333 #ifndef OPENSSL_NO_RSA
2335 EVP_PKEY *pkey = NULL;
2337 #ifndef OPENSSL_NO_EC
2338 EC_KEY *clnt_ecdh = NULL;
2339 const EC_POINT *srvr_ecpoint = NULL;
2340 EVP_PKEY *srvr_pub_pkey = NULL;
2341 unsigned char *encodedPoint = NULL;
2342 int encoded_pt_len = 0;
2343 BN_CTX *bn_ctx = NULL;
2345 unsigned char *pms = NULL;
2347 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2349 p = ssl_handshake_start(s);
2352 #ifndef OPENSSL_NO_PSK
2353 if (alg_k & SSL_PSK) {
2356 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2357 * \0-terminated identity. The last byte is for us for simulating
2360 char identity[PSK_MAX_IDENTITY_LEN + 1];
2362 unsigned char psk[PSK_MAX_PSK_LEN];
2365 if (s->psk_client_callback == NULL) {
2366 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2367 SSL_R_PSK_NO_CLIENT_CB);
2371 memset(identity, 0, sizeof(identity));
2373 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2374 identity, sizeof(identity) - 1,
2377 if (psklen > PSK_MAX_PSK_LEN) {
2378 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2379 ERR_R_INTERNAL_ERROR);
2381 } else if (psklen == 0) {
2382 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2383 SSL_R_PSK_IDENTITY_NOT_FOUND);
2387 OPENSSL_free(s->s3->tmp.psk);
2388 s->s3->tmp.psk = BUF_memdup(psk, psklen);
2389 OPENSSL_cleanse(psk, psklen);
2391 if (s->s3->tmp.psk == NULL) {
2392 OPENSSL_cleanse(identity, sizeof(identity));
2396 s->s3->tmp.psklen = psklen;
2398 identitylen = strlen(identity);
2399 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2400 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2401 ERR_R_INTERNAL_ERROR);
2404 OPENSSL_free(s->session->psk_identity);
2405 s->session->psk_identity = BUF_strdup(identity);
2406 if (s->session->psk_identity == NULL) {
2407 OPENSSL_cleanse(identity, sizeof(identity));
2411 s2n(identitylen, p);
2412 memcpy(p, identity, identitylen);
2413 pskhdrlen = 2 + identitylen;
2417 OPENSSL_cleanse(identity, sizeof(identity));
2419 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2423 if (alg_k & SSL_kPSK) {
2428 /* Fool emacs indentation */
2431 #ifndef OPENSSL_NO_RSA
2432 else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2434 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2435 pms = OPENSSL_malloc(pmslen);
2439 if (s->session->peer == NULL) {
2441 * We should always have a server certificate with SSL_kRSA.
2443 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2444 ERR_R_INTERNAL_ERROR);
2448 if (s->s3->peer_rsa_tmp != NULL)
2449 rsa = s->s3->peer_rsa_tmp;
2451 pkey = X509_get_pubkey(s->session->peer);
2452 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
2453 || (pkey->pkey.rsa == NULL)) {
2454 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2455 ERR_R_INTERNAL_ERROR);
2456 EVP_PKEY_free(pkey);
2459 rsa = pkey->pkey.rsa;
2460 EVP_PKEY_free(pkey);
2463 pms[0] = s->client_version >> 8;
2464 pms[1] = s->client_version & 0xff;
2465 if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
2469 /* Fix buf for TLS and beyond */
2470 if (s->version > SSL3_VERSION)
2472 n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING);
2474 if (s->options & SSL_OP_PKCS1_CHECK_1)
2476 if (s->options & SSL_OP_PKCS1_CHECK_2)
2480 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2481 SSL_R_BAD_RSA_ENCRYPT);
2485 /* Fix buf for TLS and beyond */
2486 if (s->version > SSL3_VERSION) {
2492 #ifndef OPENSSL_NO_DH
2493 else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) {
2494 DH *dh_srvr, *dh_clnt;
2495 if (s->s3->peer_dh_tmp != NULL)
2496 dh_srvr = s->s3->peer_dh_tmp;
2498 /* we get them from the cert */
2499 EVP_PKEY *spkey = NULL;
2501 spkey = X509_get_pubkey(s->session->peer);
2503 dh_srvr = EVP_PKEY_get1_DH(spkey);
2504 EVP_PKEY_free(spkey);
2506 if (dh_srvr == NULL) {
2507 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2508 ERR_R_INTERNAL_ERROR);
2512 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
2513 /* Use client certificate key */
2514 EVP_PKEY *clkey = s->cert->key->privatekey;
2517 dh_clnt = EVP_PKEY_get1_DH(clkey);
2518 if (dh_clnt == NULL) {
2519 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2520 ERR_R_INTERNAL_ERROR);
2524 /* generate a new random key */
2525 if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
2526 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2529 if (!DH_generate_key(dh_clnt)) {
2530 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2536 pmslen = DH_size(dh_clnt);
2537 pms = OPENSSL_malloc(pmslen);
2542 * use the 'p' output buffer for the DH key, but make sure to
2543 * clear it out afterwards
2546 n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt);
2547 if (s->s3->peer_dh_tmp == NULL)
2551 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
2557 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2560 /* send off the data */
2561 n = BN_num_bytes(dh_clnt->pub_key);
2563 BN_bn2bin(dh_clnt->pub_key, p);
2571 #ifndef OPENSSL_NO_EC
2572 else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
2573 const EC_GROUP *srvr_group = NULL;
2575 int ecdh_clnt_cert = 0;
2578 * Did we send out the client's ECDH share for use in premaster
2579 * computation as part of client certificate? If so, set
2580 * ecdh_clnt_cert to 1.
2582 if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
2584 * XXX: For now, we do not support client
2585 * authentication using ECDH certificates.
2586 * To add such support, one needs to add
2587 * code that checks for appropriate
2588 * conditions and sets ecdh_clnt_cert to 1.
2589 * For example, the cert have an ECC
2590 * key on the same curve as the server's
2591 * and the key should be authorized for
2594 * One also needs to add code in ssl3_connect
2595 * to skip sending the certificate verify
2598 * if ((s->cert->key->privatekey != NULL) &&
2599 * (s->cert->key->privatekey->type ==
2600 * EVP_PKEY_EC) && ...)
2601 * ecdh_clnt_cert = 1;
2605 if (s->s3->peer_ecdh_tmp != NULL) {
2606 tkey = s->s3->peer_ecdh_tmp;
2608 /* Get the Server Public Key from Cert */
2609 srvr_pub_pkey = X509_get_pubkey(s->session->peer);
2610 if ((srvr_pub_pkey == NULL)
2611 || (srvr_pub_pkey->type != EVP_PKEY_EC)
2612 || (srvr_pub_pkey->pkey.ec == NULL)) {
2613 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2614 ERR_R_INTERNAL_ERROR);
2618 tkey = srvr_pub_pkey->pkey.ec;
2621 srvr_group = EC_KEY_get0_group(tkey);
2622 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2624 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
2625 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2626 ERR_R_INTERNAL_ERROR);
2630 if ((clnt_ecdh = EC_KEY_new()) == NULL) {
2631 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2632 ERR_R_MALLOC_FAILURE);
2636 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
2637 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2640 if (ecdh_clnt_cert) {
2642 * Reuse key info from our certificate We only need our
2643 * private key to perform the ECDH computation.
2645 const BIGNUM *priv_key;
2646 tkey = s->cert->key->privatekey->pkey.ec;
2647 priv_key = EC_KEY_get0_private_key(tkey);
2648 if (priv_key == NULL) {
2649 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2650 ERR_R_MALLOC_FAILURE);
2653 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
2654 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2658 /* Generate a new ECDH key pair */
2659 if (!(EC_KEY_generate_key(clnt_ecdh))) {
2660 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2667 * use the 'p' output buffer for the ECDH key, but make sure to
2668 * clear it out afterwards
2671 field_size = EC_GROUP_get_degree(srvr_group);
2672 if (field_size <= 0) {
2673 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2676 pmslen = (field_size + 7) / 8;
2677 pms = OPENSSL_malloc(pmslen);
2680 n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL);
2681 if (n <= 0 || pmslen != (size_t)n) {
2682 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2686 if (ecdh_clnt_cert) {
2687 /* Send empty client key exch message */
2691 * First check the size of encoding and allocate memory
2695 EC_POINT_point2oct(srvr_group,
2696 EC_KEY_get0_public_key(clnt_ecdh),
2697 POINT_CONVERSION_UNCOMPRESSED,
2700 encodedPoint = (unsigned char *)
2701 OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
2702 bn_ctx = BN_CTX_new();
2703 if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
2704 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2705 ERR_R_MALLOC_FAILURE);
2709 /* Encode the public key */
2710 n = EC_POINT_point2oct(srvr_group,
2711 EC_KEY_get0_public_key(clnt_ecdh),
2712 POINT_CONVERSION_UNCOMPRESSED,
2713 encodedPoint, encoded_pt_len, bn_ctx);
2715 *p = n; /* length of encoded point */
2716 /* Encoded point will be copied here */
2718 /* copy the point */
2719 memcpy(p, encodedPoint, n);
2720 /* increment n to account for length field */
2724 /* Free allocated memory */
2725 BN_CTX_free(bn_ctx);
2726 OPENSSL_free(encodedPoint);
2727 EC_KEY_free(clnt_ecdh);
2728 EVP_PKEY_free(srvr_pub_pkey);
2730 #endif /* !OPENSSL_NO_EC */
2731 #ifndef OPENSSL_NO_GOST
2732 else if (alg_k & SSL_kGOST) {
2733 /* GOST key exchange message creation */
2734 EVP_PKEY_CTX *pkey_ctx;
2737 unsigned int md_len;
2738 unsigned char shared_ukm[32], tmp[256];
2739 EVP_MD_CTX *ukm_hash;
2741 int dgst_nid = NID_id_GostR3411_94;
2742 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2743 dgst_nid = NID_id_GostR3411_2012_256;
2747 pms = OPENSSL_malloc(pmslen);
2752 * Get server sertificate PKEY and create ctx from it
2754 peer_cert = s->session->peer;
2756 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2757 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2761 pkey_ctx = EVP_PKEY_CTX_new(pub_key =
2762 X509_get_pubkey(peer_cert), NULL);
2763 if (pkey_ctx == NULL) {
2764 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2765 ERR_R_MALLOC_FAILURE);
2769 * If we have send a certificate, and certificate key
2770 * parameters match those of server certificate, use
2771 * certificate key for key exchange
2774 /* Otherwise, generate ephemeral key pair */
2776 if (pkey_ctx == NULL
2777 || EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2778 /* Generate session key */
2779 || RAND_bytes(pms, pmslen) <= 0) {
2780 EVP_PKEY_CTX_free(pkey_ctx);
2781 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2782 ERR_R_INTERNAL_ERROR);
2786 * If we have client certificate, use its secret as peer key
2788 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2789 if (EVP_PKEY_derive_set_peer
2790 (pkey_ctx, s->cert->key->privatekey) <= 0) {
2792 * If there was an error - just ignore it. Ephemeral key
2799 * Compute shared IV and store it in algorithm-specific context
2802 ukm_hash = EVP_MD_CTX_create();
2803 if (EVP_DigestInit(ukm_hash,
2804 EVP_get_digestbynid(dgst_nid)) <= 0
2805 || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2806 SSL3_RANDOM_SIZE) <= 0
2807 || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2808 SSL3_RANDOM_SIZE) <= 0
2809 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
2810 EVP_MD_CTX_destroy(ukm_hash);
2811 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2812 ERR_R_INTERNAL_ERROR);
2815 EVP_MD_CTX_destroy(ukm_hash);
2816 if (EVP_PKEY_CTX_ctrl
2817 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
2819 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2823 /* Make GOST keytransport blob message */
2825 * Encapsulate it into sequence
2827 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2829 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
2830 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2834 if (msglen >= 0x80) {
2836 *(p++) = msglen & 0xff;
2839 *(p++) = msglen & 0xff;
2842 memcpy(p, tmp, msglen);
2843 /* Check if pubkey from client certificate was used */
2844 if (EVP_PKEY_CTX_ctrl
2845 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2846 /* Set flag "skip certificate verify" */
2847 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2849 EVP_PKEY_CTX_free(pkey_ctx);
2850 EVP_PKEY_free(pub_key);
2854 #ifndef OPENSSL_NO_SRP
2855 else if (alg_k & SSL_kSRP) {
2856 if (s->srp_ctx.A != NULL) {
2857 /* send off the data */
2858 n = BN_num_bytes(s->srp_ctx.A);
2860 BN_bn2bin(s->srp_ctx.A, p);
2863 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2864 ERR_R_INTERNAL_ERROR);
2867 OPENSSL_free(s->session->srp_username);
2868 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2869 if (s->session->srp_username == NULL) {
2870 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2871 ERR_R_MALLOC_FAILURE);
2877 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2878 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2882 #ifndef OPENSSL_NO_PSK
2886 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
2887 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2888 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2892 s->s3->tmp.pms = pms;
2893 s->s3->tmp.pmslen = pmslen;
2897 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2898 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2900 OPENSSL_clear_free(pms, pmslen);
2901 s->s3->tmp.pms = NULL;
2902 #ifndef OPENSSL_NO_EC
2903 BN_CTX_free(bn_ctx);
2904 OPENSSL_free(encodedPoint);
2905 EC_KEY_free(clnt_ecdh);
2906 EVP_PKEY_free(srvr_pub_pkey);
2908 #ifndef OPENSSL_NO_PSK
2909 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2910 s->s3->tmp.psk = NULL;
2912 ossl_statem_set_error(s);
2916 int tls_client_key_exchange_post_work(SSL *s)
2918 unsigned char *pms = NULL;
2921 #ifndef OPENSSL_NO_SRP
2923 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2924 if (!srp_generate_client_master_secret(s)) {
2925 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2926 ERR_R_INTERNAL_ERROR);
2932 pms = s->s3->tmp.pms;
2933 pmslen = s->s3->tmp.pmslen;
2935 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2936 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2937 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2940 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2941 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2942 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2946 #ifndef OPENSSL_NO_SCTP
2947 if (SSL_IS_DTLS(s)) {
2948 unsigned char sctpauthkey[64];
2949 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2952 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2955 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
2956 sizeof(DTLS1_SCTP_AUTH_LABEL));
2958 if (SSL_export_keying_material(s, sctpauthkey,
2959 sizeof(sctpauthkey), labelbuffer,
2960 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2963 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2964 sizeof(sctpauthkey), sctpauthkey);
2970 OPENSSL_clear_free(pms, pmslen);
2971 s->s3->tmp.pms = NULL;
2975 int tls_construct_client_verify(SSL *s)
2979 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2982 unsigned long n = 0;
2986 EVP_MD_CTX_init(&mctx);
2988 p = ssl_handshake_start(s);
2989 pkey = s->cert->key->privatekey;
2991 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2992 if (hdatalen <= 0) {
2993 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2996 if (SSL_USE_SIGALGS(s)) {
2997 if (!tls12_get_sigandhash(p, pkey, md)) {
2998 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3005 fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
3007 if (!EVP_SignInit_ex(&mctx, md, NULL)
3008 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3009 || (s->version == SSL3_VERSION
3010 && !EVP_MD_CTX_ctrl(&mctx, EVP_CTRL_SSL3_MASTER_SECRET,
3011 s->session->master_key_length,
3012 s->session->master_key))
3013 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) {
3014 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
3017 #ifndef OPENSSL_NO_GOST
3018 if (pkey->type == NID_id_GostR3410_2001
3019 || pkey->type == NID_id_GostR3410_2012_256
3020 || pkey->type == NID_id_GostR3410_2012_512) {
3021 BUF_reverse(p + 2, NULL, u);
3027 /* Digest cached records and discard handshake buffer */
3028 if (!ssl3_digest_cached_records(s, 0))
3030 if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
3031 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
3035 EVP_MD_CTX_cleanup(&mctx);
3038 EVP_MD_CTX_cleanup(&mctx);
3043 * Check a certificate can be used for client authentication. Currently check
3044 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
3045 * certificates can be used and optionally checks suitability for Suite B.
3047 static int ssl3_check_client_certificate(SSL *s)
3049 unsigned long alg_k;
3050 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3052 /* If no suitable signature algorithm can't use certificate */
3053 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
3056 * If strict mode check suitability of chain before using it. This also
3057 * adjusts suite B digest if necessary.
3059 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3060 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3062 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3063 /* See if we can use client certificate for fixed DH */
3064 if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3065 int i = s->session->peer_type;
3066 EVP_PKEY *clkey = NULL, *spkey = NULL;
3067 clkey = s->cert->key->privatekey;
3068 /* If client key not DH assume it can be used */
3069 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3072 spkey = X509_get_pubkey(s->session->peer);
3074 /* Compare server and client parameters */
3075 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3076 EVP_PKEY_free(spkey);
3080 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3085 WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
3088 EVP_PKEY *pkey = NULL;
3091 if (wst == WORK_MORE_A) {
3092 /* Let cert callback update client certificates if required */
3093 if (s->cert->cert_cb) {
3094 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3096 s->rwstate = SSL_X509_LOOKUP;
3100 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3101 ossl_statem_set_error(s);
3104 s->rwstate = SSL_NOTHING;
3106 if (ssl3_check_client_certificate(s))
3107 return WORK_FINISHED_CONTINUE;
3109 /* Fall through to WORK_MORE_B */
3113 /* We need to get a client cert */
3114 if (wst == WORK_MORE_B) {
3116 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
3117 * return(-1); We then get retied later
3119 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3121 s->rwstate = SSL_X509_LOOKUP;
3124 s->rwstate = SSL_NOTHING;
3125 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
3126 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
3128 } else if (i == 1) {
3130 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
3131 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3135 EVP_PKEY_free(pkey);
3136 if (i && !ssl3_check_client_certificate(s))
3139 if (s->version == SSL3_VERSION) {
3140 s->s3->tmp.cert_req = 0;
3141 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
3142 return WORK_FINISHED_CONTINUE;
3144 s->s3->tmp.cert_req = 2;
3145 if (!ssl3_digest_cached_records(s, 0)) {
3146 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3147 ossl_statem_set_error(s);
3153 return WORK_FINISHED_CONTINUE;
3156 /* Shouldn't ever get here */
3160 int tls_construct_client_certificate(SSL *s)
3162 if (!ssl3_output_cert_chain(s,
3163 (s->s3->tmp.cert_req ==
3164 2) ? NULL : s->cert->key)) {
3165 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3166 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
3167 ossl_statem_set_error(s);
3174 #define has_bits(i,m) (((i)&(m)) == (m))
3176 int ssl3_check_cert_and_algorithm(SSL *s)
3180 EVP_PKEY *pkey = NULL;
3182 #ifndef OPENSSL_NO_RSA
3185 #ifndef OPENSSL_NO_DH
3188 int al = SSL_AD_HANDSHAKE_FAILURE;
3190 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
3191 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
3193 /* we don't have a certificate */
3194 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
3196 #ifndef OPENSSL_NO_RSA
3197 rsa = s->s3->peer_rsa_tmp;
3199 #ifndef OPENSSL_NO_DH
3200 dh = s->s3->peer_dh_tmp;
3203 /* This is the passed certificate */
3205 idx = s->session->peer_type;
3206 #ifndef OPENSSL_NO_EC
3207 if (idx == SSL_PKEY_ECC) {
3208 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
3210 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
3215 } else if (alg_a & SSL_aECDSA) {
3216 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3217 SSL_R_MISSING_ECDSA_SIGNING_CERT);
3219 } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
3220 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
3224 pkey = X509_get_pubkey(s->session->peer);
3225 pkey_bits = EVP_PKEY_bits(pkey);
3226 i = X509_certificate_type(s->session->peer, pkey);
3227 EVP_PKEY_free(pkey);
3229 /* Check that we have a certificate if we require one */
3230 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
3231 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3232 SSL_R_MISSING_RSA_SIGNING_CERT);
3235 #ifndef OPENSSL_NO_DSA
3236 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
3237 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3238 SSL_R_MISSING_DSA_SIGNING_CERT);
3242 #ifndef OPENSSL_NO_RSA
3243 if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
3244 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
3245 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
3246 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3247 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3249 } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) {
3250 if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3251 if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
3252 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3253 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3257 /* server key exchange is not allowed. */
3258 al = SSL_AD_INTERNAL_ERROR;
3259 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3266 #ifndef OPENSSL_NO_DH
3267 if ((alg_k & SSL_kDHE) && (dh == NULL)) {
3268 al = SSL_AD_INTERNAL_ERROR;
3269 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
3271 } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3272 !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) {
3273 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3274 SSL_R_MISSING_DH_RSA_CERT);
3277 # ifndef OPENSSL_NO_DSA
3278 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3279 !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) {
3280 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3281 SSL_R_MISSING_DH_DSA_CERT);
3287 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
3288 pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3289 #ifndef OPENSSL_NO_RSA
3290 if (alg_k & SSL_kRSA) {
3292 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3293 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3295 } else if (RSA_bits(rsa) >
3296 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3297 /* We have a temporary RSA key but it's too large. */
3298 al = SSL_AD_EXPORT_RESTRICTION;
3299 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3300 SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3305 #ifndef OPENSSL_NO_DH
3306 if (alg_k & SSL_kDHE) {
3308 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) {
3309 /* We have a temporary DH key but it's too large. */
3310 al = SSL_AD_EXPORT_RESTRICTION;
3311 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3312 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3315 } else if (alg_k & (SSL_kDHr | SSL_kDHd)) {
3316 /* The cert should have had an export DH key. */
3317 al = SSL_AD_EXPORT_RESTRICTION;
3318 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3319 SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3324 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
3325 SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3331 ssl3_send_alert(s, SSL3_AL_FATAL, al);
3335 #ifndef OPENSSL_NO_NEXTPROTONEG
3336 int tls_construct_next_proto(SSL *s)
3338 unsigned int len, padding_len;
3341 len = s->next_proto_negotiated_len;
3342 padding_len = 32 - ((len + 2) % 32);
3343 d = (unsigned char *)s->init_buf->data;
3345 memcpy(d + 5, s->next_proto_negotiated, len);
3346 d[5 + len] = padding_len;
3347 memset(d + 6 + len, 0, padding_len);
3348 *(d++) = SSL3_MT_NEXT_PROTO;
3349 l2n3(2 + len + padding_len, d);
3350 s->init_num = 4 + 2 + len + padding_len;
3357 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3360 #ifndef OPENSSL_NO_ENGINE
3361 if (s->ctx->client_cert_engine) {
3362 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3363 SSL_get_client_CA_list(s),
3364 px509, ppkey, NULL, NULL, NULL);
3369 if (s->ctx->client_cert_cb)
3370 i = s->ctx->client_cert_cb(s, px509, ppkey);
3374 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
3380 int empty_reneg_info_scsv = !s->renegotiate;
3381 /* Set disabled masks for this session */
3382 ssl_set_client_disabled(s);
3388 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
3389 c = sk_SSL_CIPHER_value(sk, i);
3390 /* Skip disabled ciphers */
3391 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
3393 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
3394 if (c->id == SSL3_CK_SCSV) {
3395 if (!empty_reneg_info_scsv)
3398 empty_reneg_info_scsv = 0;
3401 j = s->method->put_cipher_by_char(c, p);
3405 * If p == q, no ciphers; caller indicates an error. Otherwise, add
3409 if (empty_reneg_info_scsv) {
3410 static SSL_CIPHER scsv = {
3411 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3413 j = s->method->put_cipher_by_char(&scsv, p);
3415 #ifdef OPENSSL_RI_DEBUG
3417 "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
3420 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
3421 static SSL_CIPHER scsv = {
3422 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3424 j = s->method->put_cipher_by_char(&scsv, p);