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 ossl_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 ossl_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
218 * ossl_statem_client_read_transition() encapsulates the logic for the allowed
219 * handshake state transitions when the client is reading messages from the
220 * server. The message type that the server has sent is provided in |mt|. The
221 * current state is in |s->statem.hand_state|.
224 * 1: Success (transition allowed)
225 * 0: Error (transition not allowed)
227 int ossl_statem_client_read_transition(SSL *s, int mt)
229 OSSL_STATEM *st = &s->statem;
232 switch(st->hand_state) {
233 case TLS_ST_CW_CLNT_HELLO:
234 if (mt == SSL3_MT_SERVER_HELLO) {
235 st->hand_state = TLS_ST_CR_SRVR_HELLO;
239 if (SSL_IS_DTLS(s)) {
240 if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
241 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
247 case TLS_ST_CR_SRVR_HELLO:
249 if (s->tlsext_ticket_expected) {
250 if (mt == SSL3_MT_NEWSESSION_TICKET) {
251 st->hand_state = TLS_ST_CR_SESSION_TICKET;
254 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
255 st->hand_state = TLS_ST_CR_CHANGE;
259 if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
260 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
262 } else if (s->version >= TLS1_VERSION
263 && s->tls_session_secret_cb != NULL
264 && s->session->tlsext_tick != NULL
265 && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
267 * Normally, we can tell if the server is resuming the session
268 * from the session ID. EAP-FAST (RFC 4851), however, relies on
269 * the next server message after the ServerHello to determine if
270 * the server is resuming.
273 st->hand_state = TLS_ST_CR_CHANGE;
275 } else if (!(s->s3->tmp.new_cipher->algorithm_auth
276 & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
277 if (mt == SSL3_MT_CERTIFICATE) {
278 st->hand_state = TLS_ST_CR_CERT;
282 ske_expected = key_exchange_expected(s);
283 if (ske_expected < 0)
285 /* SKE is optional for some PSK ciphersuites */
287 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
288 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
289 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
290 st->hand_state = TLS_ST_CR_KEY_EXCH;
293 } else if (mt == SSL3_MT_CERTIFICATE_REQUEST
294 && cert_req_allowed(s)) {
295 st->hand_state = TLS_ST_CR_CERT_REQ;
297 } else if (mt == SSL3_MT_SERVER_DONE) {
298 st->hand_state = TLS_ST_CR_SRVR_DONE;
307 * The CertificateStatus message is optional even if
308 * |tlsext_status_expected| is set
310 if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
311 st->hand_state = TLS_ST_CR_CERT_STATUS;
316 case TLS_ST_CR_CERT_STATUS:
317 ske_expected = key_exchange_expected(s);
318 if (ske_expected < 0)
320 /* SKE is optional for some PSK ciphersuites */
322 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
323 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
324 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
325 st->hand_state = TLS_ST_CR_KEY_EXCH;
332 case TLS_ST_CR_KEY_EXCH:
333 if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
334 if (cert_req_allowed(s)) {
335 st->hand_state = TLS_ST_CR_CERT_REQ;
342 case TLS_ST_CR_CERT_REQ:
343 if (mt == SSL3_MT_SERVER_DONE) {
344 st->hand_state = TLS_ST_CR_SRVR_DONE;
349 case TLS_ST_CW_FINISHED:
350 if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) {
351 st->hand_state = TLS_ST_CR_SESSION_TICKET;
353 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
354 st->hand_state = TLS_ST_CR_CHANGE;
359 case TLS_ST_CR_SESSION_TICKET:
360 if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
361 st->hand_state = TLS_ST_CR_CHANGE;
366 case TLS_ST_CR_CHANGE:
367 if (mt == SSL3_MT_FINISHED) {
368 st->hand_state = TLS_ST_CR_FINISHED;
377 /* No valid transition found */
382 * client_write_transition() works out what handshake state to move to next
383 * when the client is writing messages to be sent to the server.
385 WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
387 OSSL_STATEM *st = &s->statem;
389 switch(st->hand_state) {
391 /* Renegotiation - fall through */
393 st->hand_state = TLS_ST_CW_CLNT_HELLO;
394 return WRITE_TRAN_CONTINUE;
396 case TLS_ST_CW_CLNT_HELLO:
398 * No transition at the end of writing because we don't know what
401 return WRITE_TRAN_FINISHED;
403 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
404 st->hand_state = TLS_ST_CW_CLNT_HELLO;
405 return WRITE_TRAN_CONTINUE;
407 case TLS_ST_CR_SRVR_DONE:
408 if (s->s3->tmp.cert_req)
409 st->hand_state = TLS_ST_CW_CERT;
411 st->hand_state = TLS_ST_CW_KEY_EXCH;
412 return WRITE_TRAN_CONTINUE;
415 st->hand_state = TLS_ST_CW_KEY_EXCH;
416 return WRITE_TRAN_CONTINUE;
418 case TLS_ST_CW_KEY_EXCH:
420 * For TLS, cert_req is set to 2, so a cert chain of nothing is
421 * sent, but no verify packet is sent
424 * XXX: For now, we do not support client authentication in ECDH
425 * cipher suites with ECDH (rather than ECDSA) certificates. We
426 * need to skip the certificate verify message when client's
427 * ECDH public key is sent inside the client certificate.
429 if (s->s3->tmp.cert_req == 1) {
430 st->hand_state = TLS_ST_CW_CERT_VRFY;
432 st->hand_state = TLS_ST_CW_CHANGE;
434 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
435 st->hand_state = TLS_ST_CW_CHANGE;
437 return WRITE_TRAN_CONTINUE;
439 case TLS_ST_CW_CERT_VRFY:
440 st->hand_state = TLS_ST_CW_CHANGE;
441 return WRITE_TRAN_CONTINUE;
443 case TLS_ST_CW_CHANGE:
444 #if defined(OPENSSL_NO_NEXTPROTONEG)
445 st->hand_state = TLS_ST_CW_FINISHED;
447 if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
448 st->hand_state = TLS_ST_CW_NEXT_PROTO;
450 st->hand_state = TLS_ST_CW_FINISHED;
452 return WRITE_TRAN_CONTINUE;
454 #if !defined(OPENSSL_NO_NEXTPROTONEG)
455 case TLS_ST_CW_NEXT_PROTO:
456 st->hand_state = TLS_ST_CW_FINISHED;
457 return WRITE_TRAN_CONTINUE;
460 case TLS_ST_CW_FINISHED:
462 st->hand_state = TLS_ST_OK;
463 ossl_statem_set_in_init(s, 0);
464 return WRITE_TRAN_CONTINUE;
466 return WRITE_TRAN_FINISHED;
469 case TLS_ST_CR_FINISHED:
471 st->hand_state = TLS_ST_CW_CHANGE;
472 return WRITE_TRAN_CONTINUE;
474 st->hand_state = TLS_ST_OK;
475 ossl_statem_set_in_init(s, 0);
476 return WRITE_TRAN_CONTINUE;
480 /* Shouldn't happen */
481 return WRITE_TRAN_ERROR;
486 * Perform any pre work that needs to be done prior to sending a message from
487 * the client to the server.
489 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst)
491 OSSL_STATEM *st = &s->statem;
493 switch(st->hand_state) {
494 case TLS_ST_CW_CLNT_HELLO:
496 if (SSL_IS_DTLS(s)) {
497 /* every DTLS ClientHello resets Finished MAC */
498 ssl3_init_finished_mac(s);
503 return tls_prepare_client_certificate(s, wst);
505 case TLS_ST_CW_CHANGE:
506 if (SSL_IS_DTLS(s)) {
509 * We're into the last flight so we don't retransmit these
510 * messages unless we need to.
514 #ifndef OPENSSL_NO_SCTP
515 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
516 return dtls_wait_for_dry(s);
519 return WORK_FINISHED_CONTINUE;
522 return tls_finish_handshake(s, wst);
525 /* No pre work to be done */
529 return WORK_FINISHED_CONTINUE;
533 * Perform any work that needs to be done after sending a message from the
534 * client to the server.
536 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst)
538 OSSL_STATEM *st = &s->statem;
542 switch(st->hand_state) {
543 case TLS_ST_CW_CLNT_HELLO:
544 if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1)
546 #ifndef OPENSSL_NO_SCTP
547 /* Disable buffering for SCTP */
548 if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) {
551 * turn on buffering for the next lot of output
553 if (s->bbio != s->wbio)
554 s->wbio = BIO_push(s->bbio, s->wbio);
555 #ifndef OPENSSL_NO_SCTP
558 if (SSL_IS_DTLS(s)) {
559 /* Treat the next message as the first packet */
564 case TLS_ST_CW_KEY_EXCH:
565 if (tls_client_key_exchange_post_work(s) == 0)
569 case TLS_ST_CW_CHANGE:
570 s->session->cipher = s->s3->tmp.new_cipher;
571 #ifdef OPENSSL_NO_COMP
572 s->session->compress_meth = 0;
574 if (s->s3->tmp.new_compression == NULL)
575 s->session->compress_meth = 0;
577 s->session->compress_meth = s->s3->tmp.new_compression->id;
579 if (!s->method->ssl3_enc->setup_key_block(s))
582 if (!s->method->ssl3_enc->change_cipher_state(s,
583 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
586 if (SSL_IS_DTLS(s)) {
587 #ifndef OPENSSL_NO_SCTP
590 * Change to new shared key of SCTP-Auth, will be ignored if
593 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
598 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
602 case TLS_ST_CW_FINISHED:
603 #ifndef OPENSSL_NO_SCTP
604 if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
606 * Change to new shared key of SCTP-Auth, will be ignored if
609 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
613 if (statem_flush(s) != 1)
618 /* No post work to be done */
622 return WORK_FINISHED_CONTINUE;
626 * Construct a message to be sent from the client to the server.
628 * Valid return values are:
632 int ossl_statem_client_construct_message(SSL *s)
634 OSSL_STATEM *st = &s->statem;
636 switch(st->hand_state) {
637 case TLS_ST_CW_CLNT_HELLO:
638 return tls_construct_client_hello(s);
641 return tls_construct_client_certificate(s);
643 case TLS_ST_CW_KEY_EXCH:
644 return tls_construct_client_key_exchange(s);
646 case TLS_ST_CW_CERT_VRFY:
647 return tls_construct_client_verify(s);
649 case TLS_ST_CW_CHANGE:
651 return dtls_construct_change_cipher_spec(s);
653 return tls_construct_change_cipher_spec(s);
655 #if !defined(OPENSSL_NO_NEXTPROTONEG)
656 case TLS_ST_CW_NEXT_PROTO:
657 return tls_construct_next_proto(s);
659 case TLS_ST_CW_FINISHED:
660 return tls_construct_finished(s,
662 ssl3_enc->client_finished_label,
664 ssl3_enc->client_finished_label_len);
667 /* Shouldn't happen */
675 * Returns the maximum allowed length for the current message that we are
676 * reading. Excludes the message header.
678 unsigned long ossl_statem_client_max_message_size(SSL *s)
680 OSSL_STATEM *st = &s->statem;
682 switch(st->hand_state) {
683 case TLS_ST_CR_SRVR_HELLO:
684 return SERVER_HELLO_MAX_LENGTH;
686 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
687 return HELLO_VERIFY_REQUEST_MAX_LENGTH;
690 return s->max_cert_list;
692 case TLS_ST_CR_CERT_STATUS:
693 return SSL3_RT_MAX_PLAIN_LENGTH;
695 case TLS_ST_CR_KEY_EXCH:
696 return SERVER_KEY_EXCH_MAX_LENGTH;
698 case TLS_ST_CR_CERT_REQ:
699 return SSL3_RT_MAX_PLAIN_LENGTH;
701 case TLS_ST_CR_SRVR_DONE:
702 return SERVER_HELLO_DONE_MAX_LENGTH;
704 case TLS_ST_CR_CHANGE:
705 return CCS_MAX_LENGTH;
707 case TLS_ST_CR_SESSION_TICKET:
708 return SSL3_RT_MAX_PLAIN_LENGTH;
710 case TLS_ST_CR_FINISHED:
711 return FINISHED_MAX_LENGTH;
714 /* Shouldn't happen */
722 * Process a message that the client has been received from the server.
724 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
726 OSSL_STATEM *st = &s->statem;
728 switch(st->hand_state) {
729 case TLS_ST_CR_SRVR_HELLO:
730 return tls_process_server_hello(s, pkt);
732 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
733 return dtls_process_hello_verify(s, pkt);
736 return tls_process_server_certificate(s, pkt);
738 case TLS_ST_CR_CERT_STATUS:
739 return tls_process_cert_status(s, pkt);
741 case TLS_ST_CR_KEY_EXCH:
742 return tls_process_key_exchange(s, pkt);
744 case TLS_ST_CR_CERT_REQ:
745 return tls_process_certificate_request(s, pkt);
747 case TLS_ST_CR_SRVR_DONE:
748 return tls_process_server_done(s, pkt);
750 case TLS_ST_CR_CHANGE:
751 return tls_process_change_cipher_spec(s, pkt);
753 case TLS_ST_CR_SESSION_TICKET:
754 return tls_process_new_session_ticket(s, pkt);
756 case TLS_ST_CR_FINISHED:
757 return tls_process_finished(s, pkt);
760 /* Shouldn't happen */
764 return MSG_PROCESS_ERROR;
768 * Perform any further processing required following the receipt of a message
771 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
773 OSSL_STATEM *st = &s->statem;
775 switch(st->hand_state) {
776 #ifndef OPENSSL_NO_SCTP
777 case TLS_ST_CR_SRVR_DONE:
778 /* We only get here if we are using SCTP and we are renegotiating */
779 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
780 s->s3->in_read_app_data = 2;
781 s->rwstate = SSL_READING;
782 BIO_clear_retry_flags(SSL_get_rbio(s));
783 BIO_set_retry_read(SSL_get_rbio(s));
784 ossl_statem_set_sctp_read_sock(s, 1);
787 ossl_statem_set_sctp_read_sock(s, 0);
788 return WORK_FINISHED_STOP;
795 /* Shouldn't happen */
800 * Work out what version we should be using for the initial ClientHello if
801 * the version is currently set to (D)TLS_ANY_VERSION.
802 * Returns 1 on success
805 static int ssl_set_version(SSL *s)
807 unsigned long mask, options = s->options;
809 if (s->method->version == TLS_ANY_VERSION) {
811 * SSL_OP_NO_X disables all protocols above X *if* there are
812 * some protocols below X enabled. This is required in order
813 * to maintain "version capability" vector contiguous. So
814 * that if application wants to disable TLS1.0 in favour of
815 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
816 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3.
818 mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
819 #if !defined(OPENSSL_NO_SSL3)
823 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
824 if (options & SSL_OP_NO_TLSv1_2) {
825 if ((options & mask) != mask) {
826 s->version = TLS1_1_VERSION;
828 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
832 s->version = TLS1_2_VERSION;
835 if ((options & mask) == mask) {
836 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
839 s->version = TLS1_1_VERSION;
842 mask &= ~SSL_OP_NO_TLSv1_1;
843 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
844 s->version = TLS1_VERSION;
845 mask &= ~SSL_OP_NO_TLSv1;
846 #if !defined(OPENSSL_NO_SSL3)
847 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
848 s->version = SSL3_VERSION;
851 if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) {
852 SSLerr(SSL_F_SSL_SET_VERSION,
853 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
857 if (s->version == SSL3_VERSION && FIPS_mode()) {
858 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
862 } else if (s->method->version == DTLS_ANY_VERSION) {
863 /* Determine which DTLS version to use */
864 /* If DTLS 1.2 disabled correct the version number */
865 if (options & SSL_OP_NO_DTLSv1_2) {
866 if (tls1_suiteb(s)) {
867 SSLerr(SSL_F_SSL_SET_VERSION,
868 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
872 * Disabling all versions is silly: return an error.
874 if (options & SSL_OP_NO_DTLSv1) {
875 SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION);
879 * Update method so we don't use any DTLS 1.2 features.
881 s->method = DTLSv1_client_method();
882 s->version = DTLS1_VERSION;
885 * We only support one version: update method
887 if (options & SSL_OP_NO_DTLSv1)
888 s->method = DTLSv1_2_client_method();
889 s->version = DTLS1_2_VERSION;
893 s->client_version = s->version;
898 int tls_construct_client_hello(SSL *s)
901 unsigned char *p, *d;
905 #ifndef OPENSSL_NO_COMP
909 SSL_SESSION *sess = s->session;
911 buf = (unsigned char *)s->init_buf->data;
913 /* Work out what SSL/TLS/DTLS version to use */
914 if (ssl_set_version(s) == 0)
917 if ((sess == NULL) || (sess->ssl_version != s->version) ||
919 * In the case of EAP-FAST, we can have a pre-shared
920 * "ticket" without a session ID.
922 (!sess->session_id_length && !sess->tlsext_tick) ||
923 (sess->not_resumable)) {
924 if (!ssl_get_new_session(s, 0))
927 /* else use the pre-loaded session */
929 p = s->s3->client_random;
932 * for DTLS if client_random is initialized, reuse it, we are
933 * required to use same upon reply to HelloVerify
935 if (SSL_IS_DTLS(s)) {
938 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
947 if (i && ssl_fill_hello_random(s, 0, p,
948 sizeof(s->s3->client_random)) <= 0)
951 /* Do the message type and length last */
952 d = p = ssl_handshake_start(s);
955 * version indicates the negotiated version: for example from
956 * an SSLv2/v3 compatible client hello). The client_version
957 * field is the maximum version we permit and it is also
958 * used in RSA encrypted premaster secrets. Some servers can
959 * choke if we initially report a higher version then
960 * renegotiate to a lower one in the premaster secret. This
961 * didn't happen with TLS 1.0 as most servers supported it
962 * but it can with TLS 1.1 or later if the server only supports
965 * Possible scenario with previous logic:
966 * 1. Client hello indicates TLS 1.2
967 * 2. Server hello says TLS 1.0
968 * 3. RSA encrypted premaster secret uses 1.2.
969 * 4. Handhaked proceeds using TLS 1.0.
970 * 5. Server sends hello request to renegotiate.
971 * 6. Client hello indicates TLS v1.0 as we now
972 * know that is maximum server supports.
973 * 7. Server chokes on RSA encrypted premaster secret
974 * containing version 1.0.
976 * For interoperability it should be OK to always use the
977 * maximum version we support in client hello and then rely
978 * on the checking of version to ensure the servers isn't
979 * being inconsistent: for example initially negotiating with
980 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
981 * client_version in client hello and not resetting it to
982 * the negotiated version.
984 *(p++) = s->client_version >> 8;
985 *(p++) = s->client_version & 0xff;
988 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
989 p += SSL3_RANDOM_SIZE;
995 i = s->session->session_id_length;
998 if (i > (int)sizeof(s->session->session_id)) {
999 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
1002 memcpy(p, s->session->session_id, i);
1006 /* cookie stuff for DTLS */
1007 if (SSL_IS_DTLS(s)) {
1008 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
1009 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
1012 *(p++) = s->d1->cookie_len;
1013 memcpy(p, s->d1->cookie, s->d1->cookie_len);
1014 p += s->d1->cookie_len;
1017 /* Ciphers supported */
1018 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
1020 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
1023 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
1025 * Some servers hang if client hello > 256 bytes as hack workaround
1026 * chop number of supported ciphers to keep it well below this if we
1029 if (TLS1_get_version(s) >= TLS1_2_VERSION
1030 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
1031 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
1037 #ifdef OPENSSL_NO_COMP
1041 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
1044 j = sk_SSL_COMP_num(s->ctx->comp_methods);
1046 for (i = 0; i < j; i++) {
1047 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
1051 *(p++) = 0; /* Add the NULL method */
1053 /* TLS extensions */
1054 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
1055 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
1059 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
1061 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1062 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
1067 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
1068 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
1069 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
1075 ossl_statem_set_error(s);
1079 MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
1082 unsigned int cookie_len;
1085 if (!PACKET_forward(pkt, 2)
1086 || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
1087 al = SSL_AD_DECODE_ERROR;
1088 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
1092 cookie_len = PACKET_remaining(&cookiepkt);
1093 if (cookie_len > sizeof(s->d1->cookie)) {
1094 al = SSL_AD_ILLEGAL_PARAMETER;
1095 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
1099 if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
1100 al = SSL_AD_DECODE_ERROR;
1101 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
1104 s->d1->cookie_len = cookie_len;
1106 return MSG_PROCESS_FINISHED_READING;
1108 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1109 ossl_statem_set_error(s);
1110 return MSG_PROCESS_ERROR;
1113 MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
1115 STACK_OF(SSL_CIPHER) *sk;
1116 const SSL_CIPHER *c;
1118 size_t session_id_len;
1119 unsigned char *cipherchars;
1120 int i, al = SSL_AD_INTERNAL_ERROR;
1121 unsigned int compression;
1122 #ifndef OPENSSL_NO_COMP
1126 if (s->method->version == TLS_ANY_VERSION) {
1127 unsigned int sversion;
1129 if (!PACKET_get_net_2(pkt, &sversion)) {
1130 al = SSL_AD_DECODE_ERROR;
1131 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1135 #if TLS_MAX_VERSION != TLS1_2_VERSION
1136 #error Code needs updating for new TLS version
1138 #ifndef OPENSSL_NO_SSL3
1139 if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) {
1141 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1142 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
1143 al = SSL_AD_PROTOCOL_VERSION;
1146 s->method = SSLv3_client_method();
1149 if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) {
1150 s->method = TLSv1_client_method();
1151 } else if ((sversion == TLS1_1_VERSION) &&
1152 !(s->options & SSL_OP_NO_TLSv1_1)) {
1153 s->method = TLSv1_1_client_method();
1154 } else if ((sversion == TLS1_2_VERSION) &&
1155 !(s->options & SSL_OP_NO_TLSv1_2)) {
1156 s->method = TLSv1_2_client_method();
1158 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
1159 al = SSL_AD_PROTOCOL_VERSION;
1162 s->session->ssl_version = s->version = s->method->version;
1164 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
1165 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW);
1166 al = SSL_AD_PROTOCOL_VERSION;
1169 } else if (s->method->version == DTLS_ANY_VERSION) {
1170 /* Work out correct protocol version to use */
1171 unsigned int hversion;
1174 if (!PACKET_get_net_2(pkt, &hversion)) {
1175 al = SSL_AD_DECODE_ERROR;
1176 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1180 options = s->options;
1181 if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2))
1182 s->method = DTLSv1_2_client_method();
1183 else if (tls1_suiteb(s)) {
1184 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1185 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1186 s->version = hversion;
1187 al = SSL_AD_PROTOCOL_VERSION;
1189 } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1))
1190 s->method = DTLSv1_client_method();
1192 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1193 s->version = hversion;
1194 al = SSL_AD_PROTOCOL_VERSION;
1197 s->session->ssl_version = s->version = s->method->version;
1199 unsigned char *vers;
1201 if (!PACKET_get_bytes(pkt, &vers, 2)) {
1202 al = SSL_AD_DECODE_ERROR;
1203 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1206 if ((vers[0] != (s->version >> 8))
1207 || (vers[1] != (s->version & 0xff))) {
1208 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION);
1209 s->version = (s->version & 0xff00) | vers[1];
1210 al = SSL_AD_PROTOCOL_VERSION;
1215 /* load the server hello data */
1216 /* load the server random */
1217 if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
1218 al = SSL_AD_DECODE_ERROR;
1219 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1225 /* Get the session-id. */
1226 if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
1227 al = SSL_AD_DECODE_ERROR;
1228 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1231 session_id_len = PACKET_remaining(&session_id);
1232 if (session_id_len > sizeof s->session->session_id
1233 || session_id_len > SSL3_SESSION_ID_SIZE) {
1234 al = SSL_AD_ILLEGAL_PARAMETER;
1235 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
1239 if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
1240 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1241 al = SSL_AD_DECODE_ERROR;
1246 * Check if we can resume the session based on external pre-shared secret.
1247 * EAP-FAST (RFC 4851) supports two types of session resumption.
1248 * Resumption based on server-side state works with session IDs.
1249 * Resumption based on pre-shared Protected Access Credentials (PACs)
1250 * works by overriding the SessionTicket extension at the application
1251 * layer, and does not send a session ID. (We do not know whether EAP-FAST
1252 * servers would honour the session ID.) Therefore, the session ID alone
1253 * is not a reliable indicator of session resumption, so we first check if
1254 * we can resume, and later peek at the next handshake message to see if the
1255 * server wants to resume.
1257 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
1258 s->session->tlsext_tick) {
1259 SSL_CIPHER *pref_cipher = NULL;
1260 s->session->master_key_length = sizeof(s->session->master_key);
1261 if (s->tls_session_secret_cb(s, s->session->master_key,
1262 &s->session->master_key_length,
1264 s->tls_session_secret_cb_arg)) {
1265 s->session->cipher = pref_cipher ?
1266 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
1268 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1269 al = SSL_AD_INTERNAL_ERROR;
1274 if (session_id_len != 0 && session_id_len == s->session->session_id_length
1275 && memcmp(PACKET_data(&session_id), s->session->session_id,
1276 session_id_len) == 0) {
1277 if (s->sid_ctx_length != s->session->sid_ctx_length
1278 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
1279 /* actually a client application bug */
1280 al = SSL_AD_ILLEGAL_PARAMETER;
1281 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1282 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1288 * If we were trying for session-id reuse but the server
1289 * didn't echo the ID, make a new SSL_SESSION.
1290 * In the case of EAP-FAST and PAC, we do not send a session ID,
1291 * so the PAC-based session secret is always preserved. It'll be
1292 * overwritten if the server refuses resumption.
1294 if (s->session->session_id_length > 0) {
1295 if (!ssl_get_new_session(s, 0)) {
1300 s->session->session_id_length = session_id_len;
1301 /* session_id_len could be 0 */
1302 memcpy(s->session->session_id, PACKET_data(&session_id),
1306 c = ssl_get_cipher_by_char(s, cipherchars);
1308 /* unknown cipher */
1309 al = SSL_AD_ILLEGAL_PARAMETER;
1310 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1313 /* Set version disabled mask now we know version */
1314 if (!SSL_USE_TLS1_2_CIPHERS(s))
1315 s->s3->tmp.mask_ssl = SSL_TLSV1_2;
1317 s->s3->tmp.mask_ssl = 0;
1318 /* Skip TLS v1.0 ciphersuites if SSLv3 */
1319 if ((c->algorithm_ssl & SSL_TLSV1) && s->version == SSL3_VERSION)
1320 s->s3->tmp.mask_ssl |= SSL_TLSV1;
1322 * If it is a disabled cipher we didn't send it in client hello, so
1325 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1326 al = SSL_AD_ILLEGAL_PARAMETER;
1327 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1331 sk = ssl_get_ciphers_by_id(s);
1332 i = sk_SSL_CIPHER_find(sk, c);
1334 /* we did not say we would use this cipher */
1335 al = SSL_AD_ILLEGAL_PARAMETER;
1336 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1341 * Depending on the session caching (internal/external), the cipher
1342 * and/or cipher_id values may not be set. Make sure that cipher_id is
1343 * set and use it for comparison.
1345 if (s->session->cipher)
1346 s->session->cipher_id = s->session->cipher->id;
1347 if (s->hit && (s->session->cipher_id != c->id)) {
1348 al = SSL_AD_ILLEGAL_PARAMETER;
1349 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1350 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1353 s->s3->tmp.new_cipher = c;
1354 /* lets get the compression algorithm */
1356 if (!PACKET_get_1(pkt, &compression)) {
1357 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1358 al = SSL_AD_DECODE_ERROR;
1361 #ifdef OPENSSL_NO_COMP
1362 if (compression != 0) {
1363 al = SSL_AD_ILLEGAL_PARAMETER;
1364 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1365 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1369 * If compression is disabled we'd better not try to resume a session
1370 * using compression.
1372 if (s->session->compress_meth != 0) {
1373 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1377 if (s->hit && compression != s->session->compress_meth) {
1378 al = SSL_AD_ILLEGAL_PARAMETER;
1379 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1380 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1383 if (compression == 0)
1385 else if (!ssl_allow_compression(s)) {
1386 al = SSL_AD_ILLEGAL_PARAMETER;
1387 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1390 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1393 if (compression != 0 && comp == NULL) {
1394 al = SSL_AD_ILLEGAL_PARAMETER;
1395 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1396 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1399 s->s3->tmp.new_compression = comp;
1403 /* TLS extensions */
1404 if (!ssl_parse_serverhello_tlsext(s, pkt)) {
1405 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1409 if (PACKET_remaining(pkt) != 0) {
1410 /* wrong packet length */
1411 al = SSL_AD_DECODE_ERROR;
1412 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1416 #ifndef OPENSSL_NO_SCTP
1417 if (SSL_IS_DTLS(s) && s->hit) {
1418 unsigned char sctpauthkey[64];
1419 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
1422 * Add new shared key for SCTP-Auth, will be ignored if
1425 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
1426 sizeof(DTLS1_SCTP_AUTH_LABEL));
1428 if (SSL_export_keying_material(s, sctpauthkey,
1429 sizeof(sctpauthkey),
1431 sizeof(labelbuffer), NULL, 0,
1435 BIO_ctrl(SSL_get_wbio(s),
1436 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
1437 sizeof(sctpauthkey), sctpauthkey);
1441 return MSG_PROCESS_CONTINUE_READING;
1443 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1445 ossl_statem_set_error(s);
1446 return MSG_PROCESS_ERROR;
1449 MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
1451 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
1452 unsigned long cert_list_len, cert_len;
1454 unsigned char *certstart, *certbytes;
1455 STACK_OF(X509) *sk = NULL;
1456 EVP_PKEY *pkey = NULL;
1458 if ((sk = sk_X509_new_null()) == NULL) {
1459 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1463 if (!PACKET_get_net_3(pkt, &cert_list_len)
1464 || PACKET_remaining(pkt) != cert_list_len) {
1465 al = SSL_AD_DECODE_ERROR;
1466 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1469 while (PACKET_remaining(pkt)) {
1470 if (!PACKET_get_net_3(pkt, &cert_len)
1471 || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
1472 al = SSL_AD_DECODE_ERROR;
1473 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1474 SSL_R_CERT_LENGTH_MISMATCH);
1478 certstart = certbytes;
1479 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1481 al = SSL_AD_BAD_CERTIFICATE;
1482 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1485 if (certbytes != (certstart + cert_len)) {
1486 al = SSL_AD_DECODE_ERROR;
1487 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1488 SSL_R_CERT_LENGTH_MISMATCH);
1491 if (!sk_X509_push(sk, x)) {
1492 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1498 i = ssl_verify_cert_chain(s, sk);
1499 if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
1500 al = ssl_verify_alarm_type(s->verify_result);
1501 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1502 SSL_R_CERTIFICATE_VERIFY_FAILED);
1505 ERR_clear_error(); /* but we keep s->verify_result */
1507 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
1508 al = SSL_AD_HANDSHAKE_FAILURE;
1512 s->session->peer_chain = sk;
1514 * Inconsistency alert: cert_chain does include the peer's certificate,
1515 * which we don't include in s3_srvr.c
1517 x = sk_X509_value(sk, 0);
1520 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1523 pkey = X509_get_pubkey(x);
1525 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1528 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1529 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1533 i = ssl_cert_type(x, pkey);
1537 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1538 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1542 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1543 if (exp_idx >= 0 && i != exp_idx
1544 && (exp_idx != SSL_PKEY_GOST_EC ||
1545 (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
1546 && i != SSL_PKEY_GOST01))) {
1548 al = SSL_AD_ILLEGAL_PARAMETER;
1549 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1550 SSL_R_WRONG_CERTIFICATE_TYPE);
1553 s->session->peer_type = i;
1555 X509_free(s->session->peer);
1557 s->session->peer = x;
1558 s->session->verify_result = s->verify_result;
1561 ret = MSG_PROCESS_CONTINUE_READING;
1565 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1567 ossl_statem_set_error(s);
1569 EVP_PKEY_free(pkey);
1571 sk_X509_pop_free(sk, X509_free);
1575 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1580 EVP_PKEY *pkey = NULL;
1581 const EVP_MD *md = NULL;
1582 #ifndef OPENSSL_NO_RSA
1585 #ifndef OPENSSL_NO_EC
1586 EVP_PKEY_CTX *pctx = NULL;
1588 PACKET save_param_start, signature;
1590 md_ctx = EVP_MD_CTX_new();
1591 if (md_ctx == NULL) {
1592 al = SSL_AD_INTERNAL_ERROR;
1593 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1597 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1599 save_param_start = *pkt;
1601 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1602 EVP_PKEY_free(s->s3->peer_tmp);
1603 s->s3->peer_tmp = NULL;
1606 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1608 al = SSL_AD_DECODE_ERROR;
1610 #ifndef OPENSSL_NO_PSK
1611 /* PSK ciphersuites are preceded by an identity hint */
1612 if (alg_k & SSL_PSK) {
1613 PACKET psk_identity_hint;
1614 if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
1615 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1620 * Store PSK identity hint for later use, hint is used in
1621 * ssl3_send_client_key_exchange. Assume that the maximum length of
1622 * a PSK identity hint can be as long as the maximum length of a PSK
1625 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1626 al = SSL_AD_HANDSHAKE_FAILURE;
1627 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
1631 if (PACKET_remaining(&psk_identity_hint) == 0) {
1632 OPENSSL_free(s->session->psk_identity_hint);
1633 s->session->psk_identity_hint = NULL;
1634 } else if (!PACKET_strndup(&psk_identity_hint,
1635 &s->session->psk_identity_hint)) {
1636 al = SSL_AD_INTERNAL_ERROR;
1641 /* Nothing else to do for plain PSK or RSAPSK */
1642 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1644 #endif /* !OPENSSL_NO_PSK */
1646 * Dummy "if" to ensure sane C code in the event of various OPENSSL_NO_*
1651 #ifndef OPENSSL_NO_SRP
1652 else if (alg_k & SSL_kSRP) {
1653 PACKET prime, generator, salt, server_pub;
1654 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1655 || !PACKET_get_length_prefixed_2(pkt, &generator)
1656 || !PACKET_get_length_prefixed_1(pkt, &salt)
1657 || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
1658 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1663 BN_bin2bn(PACKET_data(&prime),
1664 PACKET_remaining(&prime), NULL)) == NULL
1666 BN_bin2bn(PACKET_data(&generator),
1667 PACKET_remaining(&generator), NULL)) == NULL
1669 BN_bin2bn(PACKET_data(&salt),
1670 PACKET_remaining(&salt), NULL)) == NULL
1672 BN_bin2bn(PACKET_data(&server_pub),
1673 PACKET_remaining(&server_pub), NULL)) == NULL) {
1674 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
1678 if (!srp_verify_server_param(s, &al)) {
1679 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
1683 /* We must check if there is a certificate */
1684 if (alg_a & (SSL_aRSA|SSL_aDSS))
1685 pkey = X509_get_pubkey(s->session->peer);
1687 #endif /* !OPENSSL_NO_SRP */
1688 #ifndef OPENSSL_NO_DH
1689 else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1690 PACKET prime, generator, pub_key;
1694 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1695 || !PACKET_get_length_prefixed_2(pkt, &generator)
1696 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1697 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1701 s->s3->peer_tmp = EVP_PKEY_new();
1704 if (s->s3->peer_tmp == NULL || dh == NULL) {
1705 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1710 if (EVP_PKEY_assign_DH(s->s3->peer_tmp, dh) == 0) {
1711 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1716 if ((dh->p = BN_bin2bn(PACKET_data(&prime),
1717 PACKET_remaining(&prime), NULL)) == NULL
1718 || (dh->g = BN_bin2bn(PACKET_data(&generator),
1719 PACKET_remaining(&generator), NULL)) == NULL
1721 BN_bin2bn(PACKET_data(&pub_key),
1722 PACKET_remaining(&pub_key), NULL)) == NULL) {
1723 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
1727 if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) {
1728 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE);
1732 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1733 al = SSL_AD_HANDSHAKE_FAILURE;
1734 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
1737 if (alg_a & (SSL_aRSA|SSL_aDSS))
1738 pkey = X509_get_pubkey(s->session->peer);
1739 /* else anonymous DH, so no certificate or pkey. */
1741 #endif /* !OPENSSL_NO_DH */
1743 #ifndef OPENSSL_NO_EC
1744 else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1746 unsigned char *ecparams;
1750 * Extract elliptic curve parameters and the server's ephemeral ECDH
1751 * public key. For now we only support named (not generic) curves and
1752 * ECParameters in this case is just three bytes.
1754 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1755 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1759 * Check curve is one of our preferences, if not server has sent an
1760 * invalid curve. ECParameters is 3 bytes.
1762 if (!tls1_check_curve(s, ecparams, 3)) {
1763 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
1767 curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2));
1768 if (curve_nid == 0) {
1769 al = SSL_AD_INTERNAL_ERROR;
1770 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1771 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1775 /* Set up EVP_PKEY with named curve as parameters */
1776 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
1778 || EVP_PKEY_paramgen_init(pctx) <= 0
1779 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
1780 || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
1781 al = SSL_AD_INTERNAL_ERROR;
1782 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1785 EVP_PKEY_CTX_free(pctx);
1788 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1789 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1793 if (EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(s->s3->peer_tmp),
1794 PACKET_data(&encoded_pt),
1795 PACKET_remaining(&encoded_pt), NULL) == 0) {
1796 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1801 * The ECC/TLS specification does not mention the use of DSA to sign
1802 * ECParameters in the server key exchange message. We do support RSA
1806 # ifndef OPENSSL_NO_RSA
1807 else if (alg_a & SSL_aRSA)
1808 pkey = X509_get_pubkey(s->session->peer);
1810 # ifndef OPENSSL_NO_EC
1811 else if (alg_a & SSL_aECDSA)
1812 pkey = X509_get_pubkey(s->session->peer);
1814 /* else anonymous ECDH, so no certificate or pkey. */
1816 al = SSL_AD_UNEXPECTED_MESSAGE;
1817 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1820 #endif /* !OPENSSL_NO_EC */
1822 /* if it was signed, check the signature */
1826 * |pkt| now points to the beginning of the signature, so the difference
1827 * equals the length of the parameters.
1829 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1830 PACKET_remaining(&save_param_start) -
1831 PACKET_remaining(pkt))) {
1832 al = SSL_AD_INTERNAL_ERROR;
1833 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1837 if (SSL_USE_SIGALGS(s)) {
1838 unsigned char *sigalgs;
1840 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1841 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1844 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1851 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1853 } else if (pkey->type == EVP_PKEY_RSA) {
1854 md = EVP_md5_sha1();
1859 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1860 || PACKET_remaining(pkt) != 0) {
1861 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1864 j = EVP_PKEY_size(pkey);
1866 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1871 * Check signature length
1873 if (PACKET_remaining(&signature) > (size_t)j) {
1874 /* wrong packet length */
1875 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1878 if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
1879 || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
1880 SSL3_RANDOM_SIZE) <= 0
1881 || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
1882 SSL3_RANDOM_SIZE) <= 0
1883 || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
1884 PACKET_remaining(¶ms)) <= 0) {
1885 al = SSL_AD_INTERNAL_ERROR;
1886 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1889 if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
1890 PACKET_remaining(&signature), pkey) <= 0) {
1892 al = SSL_AD_DECRYPT_ERROR;
1893 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1897 /* aNULL, aSRP or PSK do not need public keys */
1898 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) {
1899 /* Might be wrong key type, check it */
1900 if (ssl3_check_cert_and_algorithm(s))
1901 /* Otherwise this shouldn't happen */
1902 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1905 /* still data left over */
1906 if (PACKET_remaining(pkt) != 0) {
1907 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1911 EVP_PKEY_free(pkey);
1912 EVP_MD_CTX_free(md_ctx);
1913 return MSG_PROCESS_CONTINUE_READING;
1915 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1917 EVP_PKEY_free(pkey);
1918 #ifndef OPENSSL_NO_RSA
1921 #ifndef OPENSSL_NO_EC
1922 EVP_PKEY_CTX_free(pctx);
1924 EVP_MD_CTX_free(md_ctx);
1925 ossl_statem_set_error(s);
1926 return MSG_PROCESS_ERROR;
1929 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
1931 int ret = MSG_PROCESS_ERROR;
1932 unsigned int list_len, ctype_num, i, name_len;
1933 X509_NAME *xn = NULL;
1934 unsigned char *data;
1935 unsigned char *namestart, *namebytes;
1936 STACK_OF(X509_NAME) *ca_sk = NULL;
1938 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1939 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1943 /* get the certificate types */
1944 if (!PACKET_get_1(pkt, &ctype_num)
1945 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
1946 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1947 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1950 OPENSSL_free(s->cert->ctypes);
1951 s->cert->ctypes = NULL;
1952 if (ctype_num > SSL3_CT_NUMBER) {
1953 /* If we exceed static buffer copy all to cert structure */
1954 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1955 if (s->cert->ctypes == NULL) {
1956 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1959 memcpy(s->cert->ctypes, data, ctype_num);
1960 s->cert->ctype_num = (size_t)ctype_num;
1961 ctype_num = SSL3_CT_NUMBER;
1963 for (i = 0; i < ctype_num; i++)
1964 s->s3->tmp.ctype[i] = data[i];
1966 if (SSL_USE_SIGALGS(s)) {
1967 if (!PACKET_get_net_2(pkt, &list_len)
1968 || !PACKET_get_bytes(pkt, &data, list_len)) {
1969 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1970 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1971 SSL_R_LENGTH_MISMATCH);
1975 /* Clear certificate digests and validity flags */
1976 for (i = 0; i < SSL_PKEY_NUM; i++) {
1977 s->s3->tmp.md[i] = NULL;
1978 s->s3->tmp.valid_flags[i] = 0;
1980 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1981 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1982 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1983 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1986 if (!tls1_process_sigalgs(s)) {
1987 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1988 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1992 ssl_set_default_md(s);
1995 /* get the CA RDNs */
1996 if (!PACKET_get_net_2(pkt, &list_len)
1997 || PACKET_remaining(pkt) != list_len) {
1998 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1999 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
2003 while (PACKET_remaining(pkt)) {
2004 if (!PACKET_get_net_2(pkt, &name_len)
2005 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
2006 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2007 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
2008 SSL_R_LENGTH_MISMATCH);
2012 namestart = namebytes;
2014 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
2015 name_len)) == NULL) {
2016 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2017 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
2021 if (namebytes != (namestart + name_len)) {
2022 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2023 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
2024 SSL_R_CA_DN_LENGTH_MISMATCH);
2027 if (!sk_X509_NAME_push(ca_sk, xn)) {
2028 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2033 /* we should setup a certificate to return.... */
2034 s->s3->tmp.cert_req = 1;
2035 s->s3->tmp.ctype_num = ctype_num;
2036 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
2037 s->s3->tmp.ca_names = ca_sk;
2040 ret = MSG_PROCESS_CONTINUE_READING;
2043 ossl_statem_set_error(s);
2045 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
2049 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
2051 return (X509_NAME_cmp(*a, *b));
2054 MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
2057 unsigned int ticklen;
2058 unsigned long ticket_lifetime_hint;
2060 if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
2061 || !PACKET_get_net_2(pkt, &ticklen)
2062 || PACKET_remaining(pkt) != ticklen) {
2063 al = SSL_AD_DECODE_ERROR;
2064 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2068 /* Server is allowed to change its mind and send an empty ticket. */
2070 return MSG_PROCESS_CONTINUE_READING;
2072 if (s->session->session_id_length > 0) {
2073 int i = s->session_ctx->session_cache_mode;
2074 SSL_SESSION *new_sess;
2076 * We reused an existing session, so we need to replace it with a new
2079 if (i & SSL_SESS_CACHE_CLIENT) {
2081 * Remove the old session from the cache
2083 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
2084 if (s->session_ctx->remove_session_cb != NULL)
2085 s->session_ctx->remove_session_cb(s->session_ctx,
2088 /* We carry on if this fails */
2089 SSL_CTX_remove_session(s->session_ctx, s->session);
2093 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
2094 al = SSL_AD_INTERNAL_ERROR;
2095 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2099 SSL_SESSION_free(s->session);
2100 s->session = new_sess;
2103 OPENSSL_free(s->session->tlsext_tick);
2104 s->session->tlsext_ticklen = 0;
2106 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2107 if (s->session->tlsext_tick == NULL) {
2108 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
2111 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
2112 al = SSL_AD_DECODE_ERROR;
2113 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
2117 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
2118 s->session->tlsext_ticklen = ticklen;
2120 * There are two ways to detect a resumed ticket session. One is to set
2121 * an appropriate session ID and then the server must return a match in
2122 * ServerHello. This allows the normal client session ID matching to work
2123 * and we know much earlier that the ticket has been accepted. The
2124 * other way is to set zero length session ID when the ticket is
2125 * presented and rely on the handshake to determine session resumption.
2126 * We choose the former approach because this fits in with assumptions
2127 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
2128 * SHA256 is disabled) hash of the ticket.
2130 EVP_Digest(s->session->tlsext_tick, ticklen,
2131 s->session->session_id, &s->session->session_id_length,
2132 EVP_sha256(), NULL);
2133 return MSG_PROCESS_CONTINUE_READING;
2135 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2137 ossl_statem_set_error(s);
2138 return MSG_PROCESS_ERROR;
2141 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
2144 unsigned long resplen;
2147 if (!PACKET_get_1(pkt, &type)
2148 || type != TLSEXT_STATUSTYPE_ocsp) {
2149 al = SSL_AD_DECODE_ERROR;
2150 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
2153 if (!PACKET_get_net_3(pkt, &resplen)
2154 || PACKET_remaining(pkt) != resplen) {
2155 al = SSL_AD_DECODE_ERROR;
2156 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2159 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
2160 if (s->tlsext_ocsp_resp == NULL) {
2161 al = SSL_AD_INTERNAL_ERROR;
2162 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
2165 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
2166 al = SSL_AD_DECODE_ERROR;
2167 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2170 s->tlsext_ocsp_resplen = resplen;
2171 return MSG_PROCESS_CONTINUE_READING;
2173 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2174 ossl_statem_set_error(s);
2175 return MSG_PROCESS_ERROR;
2178 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
2180 if (PACKET_remaining(pkt) > 0) {
2181 /* should contain no data */
2182 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2183 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2184 ossl_statem_set_error(s);
2185 return MSG_PROCESS_ERROR;
2188 #ifndef OPENSSL_NO_SRP
2189 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2190 if (SRP_Calc_A_param(s) <= 0) {
2191 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2192 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2193 ossl_statem_set_error(s);
2194 return MSG_PROCESS_ERROR;
2200 * at this point we check that we have the required stuff from
2203 if (!ssl3_check_cert_and_algorithm(s)) {
2204 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2205 ossl_statem_set_error(s);
2206 return MSG_PROCESS_ERROR;
2210 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2211 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2212 * message, or NULL and -1 otherwise
2214 if (s->tlsext_status_expected && s->ctx->tlsext_status_cb != NULL) {
2216 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2218 ssl3_send_alert(s, SSL3_AL_FATAL,
2219 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
2220 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
2221 SSL_R_INVALID_STATUS_RESPONSE);
2222 return MSG_PROCESS_ERROR;
2225 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2226 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
2227 return MSG_PROCESS_ERROR;
2231 #ifndef OPENSSL_NO_SCTP
2232 /* Only applies to renegotiation */
2233 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2234 && s->renegotiate != 0)
2235 return MSG_PROCESS_CONTINUE_PROCESSING;
2238 return MSG_PROCESS_FINISHED_READING;
2241 int tls_construct_client_key_exchange(SSL *s)
2245 #ifndef OPENSSL_NO_PSK
2246 size_t pskhdrlen = 0;
2248 unsigned long alg_k;
2249 #ifndef OPENSSL_NO_RSA
2251 EVP_PKEY *pkey = NULL;
2253 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
2254 EVP_PKEY *ckey = NULL, *skey = NULL;
2256 #ifndef OPENSSL_NO_EC
2257 unsigned char *encodedPoint = NULL;
2258 int encoded_pt_len = 0;
2260 unsigned char *pms = NULL;
2262 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2264 p = ssl_handshake_start(s);
2267 #ifndef OPENSSL_NO_PSK
2268 if (alg_k & SSL_PSK) {
2271 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2272 * \0-terminated identity. The last byte is for us for simulating
2275 char identity[PSK_MAX_IDENTITY_LEN + 1];
2277 unsigned char psk[PSK_MAX_PSK_LEN];
2280 if (s->psk_client_callback == NULL) {
2281 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2282 SSL_R_PSK_NO_CLIENT_CB);
2286 memset(identity, 0, sizeof(identity));
2288 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2289 identity, sizeof(identity) - 1,
2292 if (psklen > PSK_MAX_PSK_LEN) {
2293 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2294 ERR_R_INTERNAL_ERROR);
2296 } else if (psklen == 0) {
2297 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2298 SSL_R_PSK_IDENTITY_NOT_FOUND);
2301 OPENSSL_free(s->s3->tmp.psk);
2302 s->s3->tmp.psk = OPENSSL_memdup(psk, psklen);
2303 OPENSSL_cleanse(psk, psklen);
2305 if (s->s3->tmp.psk == NULL) {
2306 OPENSSL_cleanse(identity, sizeof(identity));
2310 s->s3->tmp.psklen = psklen;
2311 identitylen = strlen(identity);
2312 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2313 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2314 ERR_R_INTERNAL_ERROR);
2317 OPENSSL_free(s->session->psk_identity);
2318 s->session->psk_identity = OPENSSL_strdup(identity);
2319 if (s->session->psk_identity == NULL) {
2320 OPENSSL_cleanse(identity, sizeof(identity));
2324 s2n(identitylen, p);
2325 memcpy(p, identity, identitylen);
2326 pskhdrlen = 2 + identitylen;
2330 OPENSSL_cleanse(identity, sizeof(identity));
2332 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2336 if (alg_k & SSL_kPSK) {
2341 /* Fool emacs indentation */
2344 #ifndef OPENSSL_NO_RSA
2345 else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2347 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2348 pms = OPENSSL_malloc(pmslen);
2352 if (s->session->peer == NULL) {
2354 * We should always have a server certificate with SSL_kRSA.
2356 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2357 ERR_R_INTERNAL_ERROR);
2361 pkey = X509_get_pubkey(s->session->peer);
2362 if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
2363 || (pkey->pkey.rsa == NULL)) {
2364 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2365 ERR_R_INTERNAL_ERROR);
2366 EVP_PKEY_free(pkey);
2369 rsa = pkey->pkey.rsa;
2370 EVP_PKEY_free(pkey);
2372 pms[0] = s->client_version >> 8;
2373 pms[1] = s->client_version & 0xff;
2374 if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
2378 /* Fix buf for TLS and beyond */
2379 if (s->version > SSL3_VERSION)
2381 n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING);
2383 if (s->options & SSL_OP_PKCS1_CHECK_1)
2385 if (s->options & SSL_OP_PKCS1_CHECK_2)
2389 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2390 SSL_R_BAD_RSA_ENCRYPT);
2394 /* Fix buf for TLS and beyond */
2395 if (s->version > SSL3_VERSION) {
2401 #ifndef OPENSSL_NO_DH
2402 else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
2404 skey = s->s3->peer_tmp;
2406 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2407 ERR_R_INTERNAL_ERROR);
2410 ckey = ssl_generate_pkey(skey, NID_undef);
2411 dh_clnt = EVP_PKEY_get0_DH(ckey);
2413 if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) {
2414 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2415 ERR_R_INTERNAL_ERROR);
2420 /* send off the data */
2421 n = BN_num_bytes(dh_clnt->pub_key);
2423 BN_bn2bin(dh_clnt->pub_key, p);
2425 EVP_PKEY_free(ckey);
2430 #ifndef OPENSSL_NO_EC
2431 else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
2433 if (s->s3->peer_tmp != NULL) {
2434 skey = s->s3->peer_tmp;
2436 /* Get the Server Public Key from Cert */
2437 skey = X509_get0_pubkey(s->session->peer);
2439 || (skey->type != EVP_PKEY_EC)
2440 || (skey->pkey.ec == NULL)) {
2441 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2442 ERR_R_INTERNAL_ERROR);
2447 ckey = ssl_generate_pkey(skey, NID_undef);
2449 if (ssl_derive(s, ckey, skey) == 0) {
2450 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EVP_LIB);
2454 /* Generate encoding of client key */
2455 encoded_pt_len = EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(ckey),
2456 POINT_CONVERSION_UNCOMPRESSED,
2457 &encodedPoint, NULL);
2459 if (encoded_pt_len == 0) {
2460 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2464 EVP_PKEY_free(ckey);
2469 *p = n; /* length of encoded point */
2470 /* Encoded point will be copied here */
2472 /* copy the point */
2473 memcpy(p, encodedPoint, n);
2474 /* increment n to account for length field */
2477 /* Free allocated memory */
2478 OPENSSL_free(encodedPoint);
2480 #endif /* !OPENSSL_NO_EC */
2481 #ifndef OPENSSL_NO_GOST
2482 else if (alg_k & SSL_kGOST) {
2483 /* GOST key exchange message creation */
2484 EVP_PKEY_CTX *pkey_ctx;
2487 unsigned int md_len;
2488 unsigned char shared_ukm[32], tmp[256];
2489 EVP_MD_CTX *ukm_hash;
2491 int dgst_nid = NID_id_GostR3411_94;
2492 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2493 dgst_nid = NID_id_GostR3411_2012_256;
2497 pms = OPENSSL_malloc(pmslen);
2502 * Get server sertificate PKEY and create ctx from it
2504 peer_cert = s->session->peer;
2506 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2507 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2511 pkey_ctx = EVP_PKEY_CTX_new(pub_key =
2512 X509_get_pubkey(peer_cert), NULL);
2513 if (pkey_ctx == NULL) {
2514 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2515 ERR_R_MALLOC_FAILURE);
2519 * If we have send a certificate, and certificate key
2520 * parameters match those of server certificate, use
2521 * certificate key for key exchange
2524 /* Otherwise, generate ephemeral key pair */
2526 if (pkey_ctx == NULL
2527 || EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2528 /* Generate session key */
2529 || RAND_bytes(pms, pmslen) <= 0) {
2530 EVP_PKEY_CTX_free(pkey_ctx);
2531 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2532 ERR_R_INTERNAL_ERROR);
2536 * If we have client certificate, use its secret as peer key
2538 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2539 if (EVP_PKEY_derive_set_peer
2540 (pkey_ctx, s->cert->key->privatekey) <= 0) {
2542 * If there was an error - just ignore it. Ephemeral key
2549 * Compute shared IV and store it in algorithm-specific context
2552 ukm_hash = EVP_MD_CTX_new();
2553 if (EVP_DigestInit(ukm_hash,
2554 EVP_get_digestbynid(dgst_nid)) <= 0
2555 || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2556 SSL3_RANDOM_SIZE) <= 0
2557 || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2558 SSL3_RANDOM_SIZE) <= 0
2559 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
2560 EVP_MD_CTX_free(ukm_hash);
2561 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2562 ERR_R_INTERNAL_ERROR);
2565 EVP_MD_CTX_free(ukm_hash);
2566 if (EVP_PKEY_CTX_ctrl
2567 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
2569 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2573 /* Make GOST keytransport blob message */
2575 * Encapsulate it into sequence
2577 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2579 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
2580 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2584 if (msglen >= 0x80) {
2586 *(p++) = msglen & 0xff;
2589 *(p++) = msglen & 0xff;
2592 memcpy(p, tmp, msglen);
2593 /* Check if pubkey from client certificate was used */
2594 if (EVP_PKEY_CTX_ctrl
2595 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2596 /* Set flag "skip certificate verify" */
2597 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2599 EVP_PKEY_CTX_free(pkey_ctx);
2600 EVP_PKEY_free(pub_key);
2604 #ifndef OPENSSL_NO_SRP
2605 else if (alg_k & SSL_kSRP) {
2606 if (s->srp_ctx.A != NULL) {
2607 /* send off the data */
2608 n = BN_num_bytes(s->srp_ctx.A);
2610 BN_bn2bin(s->srp_ctx.A, p);
2613 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2614 ERR_R_INTERNAL_ERROR);
2617 OPENSSL_free(s->session->srp_username);
2618 s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
2619 if (s->session->srp_username == NULL) {
2620 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2621 ERR_R_MALLOC_FAILURE);
2627 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2628 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2632 #ifndef OPENSSL_NO_PSK
2636 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
2637 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2638 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2643 s->s3->tmp.pms = pms;
2644 s->s3->tmp.pmslen = pmslen;
2649 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2650 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2652 OPENSSL_clear_free(pms, pmslen);
2653 s->s3->tmp.pms = NULL;
2654 #ifndef OPENSSL_NO_EC
2655 OPENSSL_free(encodedPoint);
2657 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
2658 EVP_PKEY_free(ckey);
2660 #ifndef OPENSSL_NO_PSK
2661 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2662 s->s3->tmp.psk = NULL;
2664 ossl_statem_set_error(s);
2668 int tls_client_key_exchange_post_work(SSL *s)
2670 unsigned char *pms = NULL;
2673 #ifndef OPENSSL_NO_SRP
2675 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2676 if (!srp_generate_client_master_secret(s)) {
2677 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2678 ERR_R_INTERNAL_ERROR);
2684 pms = s->s3->tmp.pms;
2685 pmslen = s->s3->tmp.pmslen;
2687 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2688 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2689 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2692 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2693 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2694 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2698 #ifndef OPENSSL_NO_SCTP
2699 if (SSL_IS_DTLS(s)) {
2700 unsigned char sctpauthkey[64];
2701 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2704 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2707 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
2708 sizeof(DTLS1_SCTP_AUTH_LABEL));
2710 if (SSL_export_keying_material(s, sctpauthkey,
2711 sizeof(sctpauthkey), labelbuffer,
2712 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2715 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2716 sizeof(sctpauthkey), sctpauthkey);
2722 OPENSSL_clear_free(pms, pmslen);
2723 s->s3->tmp.pms = NULL;
2727 int tls_construct_client_verify(SSL *s)
2731 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2734 unsigned long n = 0;
2738 mctx = EVP_MD_CTX_new();
2740 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2744 p = ssl_handshake_start(s);
2745 pkey = s->cert->key->privatekey;
2747 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2748 if (hdatalen <= 0) {
2749 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2752 if (SSL_USE_SIGALGS(s)) {
2753 if (!tls12_get_sigandhash(p, pkey, md)) {
2754 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2761 fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
2763 if (!EVP_SignInit_ex(mctx, md, NULL)
2764 || !EVP_SignUpdate(mctx, hdata, hdatalen)
2765 || (s->version == SSL3_VERSION
2766 && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
2767 s->session->master_key_length,
2768 s->session->master_key))
2769 || !EVP_SignFinal(mctx, p + 2, &u, pkey)) {
2770 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
2773 #ifndef OPENSSL_NO_GOST
2774 if (pkey->type == NID_id_GostR3410_2001
2775 || pkey->type == NID_id_GostR3410_2012_256
2776 || pkey->type == NID_id_GostR3410_2012_512) {
2777 BUF_reverse(p + 2, NULL, u);
2783 /* Digest cached records and discard handshake buffer */
2784 if (!ssl3_digest_cached_records(s, 0))
2786 if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
2787 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2791 EVP_MD_CTX_free(mctx);
2794 EVP_MD_CTX_free(mctx);
2799 * Check a certificate can be used for client authentication. Currently check
2800 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2801 * certificates can be used and optionally checks suitability for Suite B.
2803 static int ssl3_check_client_certificate(SSL *s)
2805 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
2807 /* If no suitable signature algorithm can't use certificate */
2808 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
2811 * If strict mode check suitability of chain before using it. This also
2812 * adjusts suite B digest if necessary.
2814 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
2815 !tls1_check_chain(s, NULL, NULL, NULL, -2))
2820 WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
2823 EVP_PKEY *pkey = NULL;
2826 if (wst == WORK_MORE_A) {
2827 /* Let cert callback update client certificates if required */
2828 if (s->cert->cert_cb) {
2829 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
2831 s->rwstate = SSL_X509_LOOKUP;
2835 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2836 ossl_statem_set_error(s);
2839 s->rwstate = SSL_NOTHING;
2841 if (ssl3_check_client_certificate(s))
2842 return WORK_FINISHED_CONTINUE;
2844 /* Fall through to WORK_MORE_B */
2848 /* We need to get a client cert */
2849 if (wst == WORK_MORE_B) {
2851 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2852 * return(-1); We then get retied later
2854 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2856 s->rwstate = SSL_X509_LOOKUP;
2859 s->rwstate = SSL_NOTHING;
2860 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2861 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2863 } else if (i == 1) {
2865 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
2866 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2870 EVP_PKEY_free(pkey);
2871 if (i && !ssl3_check_client_certificate(s))
2874 if (s->version == SSL3_VERSION) {
2875 s->s3->tmp.cert_req = 0;
2876 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2877 return WORK_FINISHED_CONTINUE;
2879 s->s3->tmp.cert_req = 2;
2880 if (!ssl3_digest_cached_records(s, 0)) {
2881 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2882 ossl_statem_set_error(s);
2888 return WORK_FINISHED_CONTINUE;
2891 /* Shouldn't ever get here */
2895 int tls_construct_client_certificate(SSL *s)
2897 if (!ssl3_output_cert_chain(s,
2898 (s->s3->tmp.cert_req ==
2899 2) ? NULL : s->cert->key)) {
2900 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
2901 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2902 ossl_statem_set_error(s);
2909 #define has_bits(i,m) (((i)&(m)) == (m))
2911 int ssl3_check_cert_and_algorithm(SSL *s)
2914 #ifndef OPENSSL_NO_EC
2918 EVP_PKEY *pkey = NULL;
2919 int al = SSL_AD_HANDSHAKE_FAILURE;
2921 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2922 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2924 /* we don't have a certificate */
2925 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
2928 /* This is the passed certificate */
2930 #ifndef OPENSSL_NO_EC
2931 idx = s->session->peer_type;
2932 if (idx == SSL_PKEY_ECC) {
2933 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
2935 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2940 } else if (alg_a & SSL_aECDSA) {
2941 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2942 SSL_R_MISSING_ECDSA_SIGNING_CERT);
2944 } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
2945 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
2949 pkey = X509_get_pubkey(s->session->peer);
2950 i = X509_certificate_type(s->session->peer, pkey);
2951 EVP_PKEY_free(pkey);
2953 /* Check that we have a certificate if we require one */
2954 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2955 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2956 SSL_R_MISSING_RSA_SIGNING_CERT);
2959 #ifndef OPENSSL_NO_DSA
2960 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2961 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2962 SSL_R_MISSING_DSA_SIGNING_CERT);
2966 #ifndef OPENSSL_NO_RSA
2967 if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
2968 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2969 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2970 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2974 #ifndef OPENSSL_NO_DH
2975 if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
2976 al = SSL_AD_INTERNAL_ERROR;
2977 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
2984 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2988 #ifndef OPENSSL_NO_NEXTPROTONEG
2989 int tls_construct_next_proto(SSL *s)
2991 unsigned int len, padding_len;
2994 len = s->next_proto_negotiated_len;
2995 padding_len = 32 - ((len + 2) % 32);
2996 d = (unsigned char *)s->init_buf->data;
2998 memcpy(d + 5, s->next_proto_negotiated, len);
2999 d[5 + len] = padding_len;
3000 memset(d + 6 + len, 0, padding_len);
3001 *(d++) = SSL3_MT_NEXT_PROTO;
3002 l2n3(2 + len + padding_len, d);
3003 s->init_num = 4 + 2 + len + padding_len;
3010 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3013 #ifndef OPENSSL_NO_ENGINE
3014 if (s->ctx->client_cert_engine) {
3015 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3016 SSL_get_client_CA_list(s),
3017 px509, ppkey, NULL, NULL, NULL);
3022 if (s->ctx->client_cert_cb)
3023 i = s->ctx->client_cert_cb(s, px509, ppkey);
3027 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
3033 int empty_reneg_info_scsv = !s->renegotiate;
3034 /* Set disabled masks for this session */
3035 ssl_set_client_disabled(s);
3041 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
3042 c = sk_SSL_CIPHER_value(sk, i);
3043 /* Skip disabled ciphers */
3044 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
3046 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
3047 if (c->id == SSL3_CK_SCSV) {
3048 if (!empty_reneg_info_scsv)
3051 empty_reneg_info_scsv = 0;
3054 j = s->method->put_cipher_by_char(c, p);
3058 * If p == q, no ciphers; caller indicates an error. Otherwise, add
3062 if (empty_reneg_info_scsv) {
3063 static SSL_CIPHER scsv = {
3064 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3066 j = s->method->put_cipher_by_char(&scsv, p);
3068 #ifdef OPENSSL_RI_DEBUG
3070 "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
3073 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
3074 static SSL_CIPHER scsv = {
3075 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
3077 j = s->method->put_cipher_by_char(&scsv, p);