1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
57 /* ====================================================================
58 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
64 * 1. Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in
69 * the documentation and/or other materials provided with the
72 * 3. All advertising materials mentioning features or use of this
73 * software must display the following acknowledgment:
74 * "This product includes software developed by the OpenSSL Project
75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78 * endorse or promote products derived from this software without
79 * prior written permission. For written permission, please contact
80 * openssl-core@openssl.org.
82 * 5. Products derived from this software may not be called "OpenSSL"
83 * nor may "OpenSSL" appear in their names without prior written
84 * permission of the OpenSSL Project.
86 * 6. Redistributions of any form whatsoever must retain the following
88 * "This product includes software developed by the OpenSSL Project
89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102 * OF THE POSSIBILITY OF SUCH DAMAGE.
103 * ====================================================================
105 * This product includes cryptographic software written by Eric Young
106 * (eay@cryptsoft.com). This product includes software written by Tim
107 * Hudson (tjh@cryptsoft.com).
110 /* ====================================================================
111 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * Portions of the attached software ("Contribution") are developed by
114 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 * The Contribution is licensed pursuant to the OpenSSL open source
117 * license provided above.
119 * ECC cipher suite support in OpenSSL originally written by
120 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
123 /* ====================================================================
124 * Copyright 2005 Nokia. All rights reserved.
126 * The portions of the attached software ("Contribution") is developed by
127 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
130 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
131 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
132 * support (see RFC 4279) to OpenSSL.
134 * No patent licenses or other rights except those expressly stated in
135 * the OpenSSL open source license shall be deemed granted or received
136 * expressly, by implication, estoppel, or otherwise.
138 * No assurances are provided by Nokia that the Contribution does not
139 * infringe the patent or other intellectual property rights of any third
140 * party or that the license provides you with all the necessary rights
141 * to make use of the Contribution.
143 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
144 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
145 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
146 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
151 #include "../ssl_locl.h"
152 #include "statem_locl.h"
153 #include <openssl/buffer.h>
154 #include <openssl/rand.h>
155 #include <openssl/objects.h>
156 #include <openssl/evp.h>
157 #include <openssl/md5.h>
158 #ifndef OPENSSL_NO_DH
159 # include <openssl/dh.h>
161 #include <openssl/bn.h>
162 #ifndef OPENSSL_NO_ENGINE
163 # include <openssl/engine.h>
166 static ossl_inline int cert_req_allowed(SSL *s);
167 static int key_exchange_expected(SSL *s);
168 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
169 static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
174 * Is a CertificateRequest message allowed at the moment or not?
180 static ossl_inline int cert_req_allowed(SSL *s)
182 /* TLS does not like anon-DH with client cert */
183 if ((s->version > SSL3_VERSION
184 && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
185 || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK)))
192 * Should we expect the ServerKeyExchange message or not?
199 static int key_exchange_expected(SSL *s)
201 long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
204 * Can't skip server key exchange if this is an ephemeral
205 * ciphersuite or for SRP
207 if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK
216 * ossl_statem_client_read_transition() encapsulates the logic for the allowed
217 * handshake state transitions when the client is reading messages from the
218 * server. The message type that the server has sent is provided in |mt|. The
219 * current state is in |s->statem.hand_state|.
222 * 1: Success (transition allowed)
223 * 0: Error (transition not allowed)
225 int ossl_statem_client_read_transition(SSL *s, int mt)
227 OSSL_STATEM *st = &s->statem;
230 switch(st->hand_state) {
231 case TLS_ST_CW_CLNT_HELLO:
232 if (mt == SSL3_MT_SERVER_HELLO) {
233 st->hand_state = TLS_ST_CR_SRVR_HELLO;
237 if (SSL_IS_DTLS(s)) {
238 if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
239 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
245 case TLS_ST_CR_SRVR_HELLO:
247 if (s->tlsext_ticket_expected) {
248 if (mt == SSL3_MT_NEWSESSION_TICKET) {
249 st->hand_state = TLS_ST_CR_SESSION_TICKET;
252 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
253 st->hand_state = TLS_ST_CR_CHANGE;
257 if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
258 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
260 } else if (s->version >= TLS1_VERSION
261 && s->tls_session_secret_cb != NULL
262 && s->session->tlsext_tick != NULL
263 && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
265 * Normally, we can tell if the server is resuming the session
266 * from the session ID. EAP-FAST (RFC 4851), however, relies on
267 * the next server message after the ServerHello to determine if
268 * the server is resuming.
271 st->hand_state = TLS_ST_CR_CHANGE;
273 } else if (!(s->s3->tmp.new_cipher->algorithm_auth
274 & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
275 if (mt == SSL3_MT_CERTIFICATE) {
276 st->hand_state = TLS_ST_CR_CERT;
280 ske_expected = key_exchange_expected(s);
281 if (ske_expected < 0)
283 /* SKE is optional for some PSK ciphersuites */
285 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
286 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
287 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
288 st->hand_state = TLS_ST_CR_KEY_EXCH;
291 } else if (mt == SSL3_MT_CERTIFICATE_REQUEST
292 && cert_req_allowed(s)) {
293 st->hand_state = TLS_ST_CR_CERT_REQ;
295 } else if (mt == SSL3_MT_SERVER_DONE) {
296 st->hand_state = TLS_ST_CR_SRVR_DONE;
305 * The CertificateStatus message is optional even if
306 * |tlsext_status_expected| is set
308 if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
309 st->hand_state = TLS_ST_CR_CERT_STATUS;
314 case TLS_ST_CR_CERT_STATUS:
315 ske_expected = key_exchange_expected(s);
316 if (ske_expected < 0)
318 /* SKE is optional for some PSK ciphersuites */
320 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
321 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
322 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
323 st->hand_state = TLS_ST_CR_KEY_EXCH;
330 case TLS_ST_CR_KEY_EXCH:
331 if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
332 if (cert_req_allowed(s)) {
333 st->hand_state = TLS_ST_CR_CERT_REQ;
340 case TLS_ST_CR_CERT_REQ:
341 if (mt == SSL3_MT_SERVER_DONE) {
342 st->hand_state = TLS_ST_CR_SRVR_DONE;
347 case TLS_ST_CW_FINISHED:
348 if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) {
349 st->hand_state = TLS_ST_CR_SESSION_TICKET;
351 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
352 st->hand_state = TLS_ST_CR_CHANGE;
357 case TLS_ST_CR_SESSION_TICKET:
358 if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
359 st->hand_state = TLS_ST_CR_CHANGE;
364 case TLS_ST_CR_CHANGE:
365 if (mt == SSL3_MT_FINISHED) {
366 st->hand_state = TLS_ST_CR_FINISHED;
375 /* No valid transition found */
380 * client_write_transition() works out what handshake state to move to next
381 * when the client is writing messages to be sent to the server.
383 WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
385 OSSL_STATEM *st = &s->statem;
387 switch(st->hand_state) {
389 /* Renegotiation - fall through */
391 st->hand_state = TLS_ST_CW_CLNT_HELLO;
392 return WRITE_TRAN_CONTINUE;
394 case TLS_ST_CW_CLNT_HELLO:
396 * No transition at the end of writing because we don't know what
399 return WRITE_TRAN_FINISHED;
401 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
402 st->hand_state = TLS_ST_CW_CLNT_HELLO;
403 return WRITE_TRAN_CONTINUE;
405 case TLS_ST_CR_SRVR_DONE:
406 if (s->s3->tmp.cert_req)
407 st->hand_state = TLS_ST_CW_CERT;
409 st->hand_state = TLS_ST_CW_KEY_EXCH;
410 return WRITE_TRAN_CONTINUE;
413 st->hand_state = TLS_ST_CW_KEY_EXCH;
414 return WRITE_TRAN_CONTINUE;
416 case TLS_ST_CW_KEY_EXCH:
418 * For TLS, cert_req is set to 2, so a cert chain of nothing is
419 * sent, but no verify packet is sent
422 * XXX: For now, we do not support client authentication in ECDH
423 * cipher suites with ECDH (rather than ECDSA) certificates. We
424 * need to skip the certificate verify message when client's
425 * ECDH public key is sent inside the client certificate.
427 if (s->s3->tmp.cert_req == 1) {
428 st->hand_state = TLS_ST_CW_CERT_VRFY;
430 st->hand_state = TLS_ST_CW_CHANGE;
432 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
433 st->hand_state = TLS_ST_CW_CHANGE;
435 return WRITE_TRAN_CONTINUE;
437 case TLS_ST_CW_CERT_VRFY:
438 st->hand_state = TLS_ST_CW_CHANGE;
439 return WRITE_TRAN_CONTINUE;
441 case TLS_ST_CW_CHANGE:
442 #if defined(OPENSSL_NO_NEXTPROTONEG)
443 st->hand_state = TLS_ST_CW_FINISHED;
445 if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
446 st->hand_state = TLS_ST_CW_NEXT_PROTO;
448 st->hand_state = TLS_ST_CW_FINISHED;
450 return WRITE_TRAN_CONTINUE;
452 #if !defined(OPENSSL_NO_NEXTPROTONEG)
453 case TLS_ST_CW_NEXT_PROTO:
454 st->hand_state = TLS_ST_CW_FINISHED;
455 return WRITE_TRAN_CONTINUE;
458 case TLS_ST_CW_FINISHED:
460 st->hand_state = TLS_ST_OK;
461 ossl_statem_set_in_init(s, 0);
462 return WRITE_TRAN_CONTINUE;
464 return WRITE_TRAN_FINISHED;
467 case TLS_ST_CR_FINISHED:
469 st->hand_state = TLS_ST_CW_CHANGE;
470 return WRITE_TRAN_CONTINUE;
472 st->hand_state = TLS_ST_OK;
473 ossl_statem_set_in_init(s, 0);
474 return WRITE_TRAN_CONTINUE;
478 /* Shouldn't happen */
479 return WRITE_TRAN_ERROR;
484 * Perform any pre work that needs to be done prior to sending a message from
485 * the client to the server.
487 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst)
489 OSSL_STATEM *st = &s->statem;
491 switch(st->hand_state) {
492 case TLS_ST_CW_CLNT_HELLO:
494 if (SSL_IS_DTLS(s)) {
495 /* every DTLS ClientHello resets Finished MAC */
496 ssl3_init_finished_mac(s);
501 return tls_prepare_client_certificate(s, wst);
503 case TLS_ST_CW_CHANGE:
504 if (SSL_IS_DTLS(s)) {
507 * We're into the last flight so we don't retransmit these
508 * messages unless we need to.
512 #ifndef OPENSSL_NO_SCTP
513 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
514 return dtls_wait_for_dry(s);
517 return WORK_FINISHED_CONTINUE;
520 return tls_finish_handshake(s, wst);
523 /* No pre work to be done */
527 return WORK_FINISHED_CONTINUE;
531 * Perform any work that needs to be done after sending a message from the
532 * client to the server.
534 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst)
536 OSSL_STATEM *st = &s->statem;
540 switch(st->hand_state) {
541 case TLS_ST_CW_CLNT_HELLO:
542 if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1)
544 #ifndef OPENSSL_NO_SCTP
545 /* Disable buffering for SCTP */
546 if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) {
549 * turn on buffering for the next lot of output
551 if (s->bbio != s->wbio)
552 s->wbio = BIO_push(s->bbio, s->wbio);
553 #ifndef OPENSSL_NO_SCTP
556 if (SSL_IS_DTLS(s)) {
557 /* Treat the next message as the first packet */
562 case TLS_ST_CW_KEY_EXCH:
563 if (tls_client_key_exchange_post_work(s) == 0)
567 case TLS_ST_CW_CHANGE:
568 s->session->cipher = s->s3->tmp.new_cipher;
569 #ifdef OPENSSL_NO_COMP
570 s->session->compress_meth = 0;
572 if (s->s3->tmp.new_compression == NULL)
573 s->session->compress_meth = 0;
575 s->session->compress_meth = s->s3->tmp.new_compression->id;
577 if (!s->method->ssl3_enc->setup_key_block(s))
580 if (!s->method->ssl3_enc->change_cipher_state(s,
581 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
584 if (SSL_IS_DTLS(s)) {
585 #ifndef OPENSSL_NO_SCTP
588 * Change to new shared key of SCTP-Auth, will be ignored if
591 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
596 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
600 case TLS_ST_CW_FINISHED:
601 #ifndef OPENSSL_NO_SCTP
602 if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
604 * Change to new shared key of SCTP-Auth, will be ignored if
607 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
611 if (statem_flush(s) != 1)
616 /* No post work to be done */
620 return WORK_FINISHED_CONTINUE;
624 * Construct a message to be sent from the client to the server.
626 * Valid return values are:
630 int ossl_statem_client_construct_message(SSL *s)
632 OSSL_STATEM *st = &s->statem;
634 switch(st->hand_state) {
635 case TLS_ST_CW_CLNT_HELLO:
636 return tls_construct_client_hello(s);
639 return tls_construct_client_certificate(s);
641 case TLS_ST_CW_KEY_EXCH:
642 return tls_construct_client_key_exchange(s);
644 case TLS_ST_CW_CERT_VRFY:
645 return tls_construct_client_verify(s);
647 case TLS_ST_CW_CHANGE:
649 return dtls_construct_change_cipher_spec(s);
651 return tls_construct_change_cipher_spec(s);
653 #if !defined(OPENSSL_NO_NEXTPROTONEG)
654 case TLS_ST_CW_NEXT_PROTO:
655 return tls_construct_next_proto(s);
657 case TLS_ST_CW_FINISHED:
658 return tls_construct_finished(s,
660 ssl3_enc->client_finished_label,
662 ssl3_enc->client_finished_label_len);
665 /* Shouldn't happen */
673 * Returns the maximum allowed length for the current message that we are
674 * reading. Excludes the message header.
676 unsigned long ossl_statem_client_max_message_size(SSL *s)
678 OSSL_STATEM *st = &s->statem;
680 switch(st->hand_state) {
681 case TLS_ST_CR_SRVR_HELLO:
682 return SERVER_HELLO_MAX_LENGTH;
684 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
685 return HELLO_VERIFY_REQUEST_MAX_LENGTH;
688 return s->max_cert_list;
690 case TLS_ST_CR_CERT_STATUS:
691 return SSL3_RT_MAX_PLAIN_LENGTH;
693 case TLS_ST_CR_KEY_EXCH:
694 return SERVER_KEY_EXCH_MAX_LENGTH;
696 case TLS_ST_CR_CERT_REQ:
697 /* Set to s->max_cert_list for compatibility with previous releases.
698 * In practice these messages can get quite long if servers are
699 * configured to provide a long list of acceptable CAs
701 return s->max_cert_list;
703 case TLS_ST_CR_SRVR_DONE:
704 return SERVER_HELLO_DONE_MAX_LENGTH;
706 case TLS_ST_CR_CHANGE:
707 return CCS_MAX_LENGTH;
709 case TLS_ST_CR_SESSION_TICKET:
710 return SSL3_RT_MAX_PLAIN_LENGTH;
712 case TLS_ST_CR_FINISHED:
713 return FINISHED_MAX_LENGTH;
716 /* Shouldn't happen */
724 * Process a message that the client has been received from the server.
726 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
728 OSSL_STATEM *st = &s->statem;
730 switch(st->hand_state) {
731 case TLS_ST_CR_SRVR_HELLO:
732 return tls_process_server_hello(s, pkt);
734 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
735 return dtls_process_hello_verify(s, pkt);
738 return tls_process_server_certificate(s, pkt);
740 case TLS_ST_CR_CERT_STATUS:
741 return tls_process_cert_status(s, pkt);
743 case TLS_ST_CR_KEY_EXCH:
744 return tls_process_key_exchange(s, pkt);
746 case TLS_ST_CR_CERT_REQ:
747 return tls_process_certificate_request(s, pkt);
749 case TLS_ST_CR_SRVR_DONE:
750 return tls_process_server_done(s, pkt);
752 case TLS_ST_CR_CHANGE:
753 return tls_process_change_cipher_spec(s, pkt);
755 case TLS_ST_CR_SESSION_TICKET:
756 return tls_process_new_session_ticket(s, pkt);
758 case TLS_ST_CR_FINISHED:
759 return tls_process_finished(s, pkt);
762 /* Shouldn't happen */
766 return MSG_PROCESS_ERROR;
770 * Perform any further processing required following the receipt of a message
773 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
775 OSSL_STATEM *st = &s->statem;
777 switch(st->hand_state) {
778 #ifndef OPENSSL_NO_SCTP
779 case TLS_ST_CR_SRVR_DONE:
780 /* We only get here if we are using SCTP and we are renegotiating */
781 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
782 s->s3->in_read_app_data = 2;
783 s->rwstate = SSL_READING;
784 BIO_clear_retry_flags(SSL_get_rbio(s));
785 BIO_set_retry_read(SSL_get_rbio(s));
786 ossl_statem_set_sctp_read_sock(s, 1);
789 ossl_statem_set_sctp_read_sock(s, 0);
790 return WORK_FINISHED_STOP;
797 /* Shouldn't happen */
801 int tls_construct_client_hello(SSL *s)
804 unsigned char *p, *d;
809 #ifndef OPENSSL_NO_COMP
813 SSL_SESSION *sess = s->session;
815 buf = (unsigned char *)s->init_buf->data;
817 /* Work out what SSL/TLS/DTLS version to use */
818 protverr = ssl_set_client_hello_version(s);
820 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
824 if ((sess == NULL) || (sess->ssl_version != s->version) ||
826 * In the case of EAP-FAST, we can have a pre-shared
827 * "ticket" without a session ID.
829 (!sess->session_id_length && !sess->tlsext_tick) ||
830 (sess->not_resumable)) {
831 if (!ssl_get_new_session(s, 0))
834 /* else use the pre-loaded session */
836 p = s->s3->client_random;
839 * for DTLS if client_random is initialized, reuse it, we are
840 * required to use same upon reply to HelloVerify
842 if (SSL_IS_DTLS(s)) {
845 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
854 if (i && ssl_fill_hello_random(s, 0, p,
855 sizeof(s->s3->client_random)) <= 0)
858 /* Do the message type and length last */
859 d = p = ssl_handshake_start(s);
862 * version indicates the negotiated version: for example from
863 * an SSLv2/v3 compatible client hello). The client_version
864 * field is the maximum version we permit and it is also
865 * used in RSA encrypted premaster secrets. Some servers can
866 * choke if we initially report a higher version then
867 * renegotiate to a lower one in the premaster secret. This
868 * didn't happen with TLS 1.0 as most servers supported it
869 * but it can with TLS 1.1 or later if the server only supports
872 * Possible scenario with previous logic:
873 * 1. Client hello indicates TLS 1.2
874 * 2. Server hello says TLS 1.0
875 * 3. RSA encrypted premaster secret uses 1.2.
876 * 4. Handhaked proceeds using TLS 1.0.
877 * 5. Server sends hello request to renegotiate.
878 * 6. Client hello indicates TLS v1.0 as we now
879 * know that is maximum server supports.
880 * 7. Server chokes on RSA encrypted premaster secret
881 * containing version 1.0.
883 * For interoperability it should be OK to always use the
884 * maximum version we support in client hello and then rely
885 * on the checking of version to ensure the servers isn't
886 * being inconsistent: for example initially negotiating with
887 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
888 * client_version in client hello and not resetting it to
889 * the negotiated version.
891 *(p++) = s->client_version >> 8;
892 *(p++) = s->client_version & 0xff;
895 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
896 p += SSL3_RANDOM_SIZE;
902 i = s->session->session_id_length;
905 if (i > (int)sizeof(s->session->session_id)) {
906 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
909 memcpy(p, s->session->session_id, i);
913 /* cookie stuff for DTLS */
914 if (SSL_IS_DTLS(s)) {
915 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
916 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
919 *(p++) = s->d1->cookie_len;
920 memcpy(p, s->d1->cookie, s->d1->cookie_len);
921 p += s->d1->cookie_len;
924 /* Ciphers supported */
925 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
927 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
930 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
932 * Some servers hang if client hello > 256 bytes as hack workaround
933 * chop number of supported ciphers to keep it well below this if we
936 if (TLS1_get_version(s) >= TLS1_2_VERSION
937 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
938 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
944 #ifdef OPENSSL_NO_COMP
948 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
951 j = sk_SSL_COMP_num(s->ctx->comp_methods);
953 for (i = 0; i < j; i++) {
954 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
958 *(p++) = 0; /* Add the NULL method */
961 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
962 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
966 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
968 ssl3_send_alert(s, SSL3_AL_FATAL, al);
969 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
974 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
975 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
976 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
982 ossl_statem_set_error(s);
986 MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
989 unsigned int cookie_len;
992 if (!PACKET_forward(pkt, 2)
993 || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
994 al = SSL_AD_DECODE_ERROR;
995 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
999 cookie_len = PACKET_remaining(&cookiepkt);
1000 if (cookie_len > sizeof(s->d1->cookie)) {
1001 al = SSL_AD_ILLEGAL_PARAMETER;
1002 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
1006 if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
1007 al = SSL_AD_DECODE_ERROR;
1008 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
1011 s->d1->cookie_len = cookie_len;
1013 return MSG_PROCESS_FINISHED_READING;
1015 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1016 ossl_statem_set_error(s);
1017 return MSG_PROCESS_ERROR;
1020 MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
1022 STACK_OF(SSL_CIPHER) *sk;
1023 const SSL_CIPHER *c;
1025 size_t session_id_len;
1026 const unsigned char *cipherchars;
1027 int i, al = SSL_AD_INTERNAL_ERROR;
1028 unsigned int compression;
1029 unsigned int sversion;
1031 #ifndef OPENSSL_NO_COMP
1035 if (!PACKET_get_net_2(pkt, &sversion)) {
1036 al = SSL_AD_DECODE_ERROR;
1037 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1041 protverr = ssl_choose_client_version(s, sversion);
1042 if (protverr != 0) {
1043 al = SSL_AD_PROTOCOL_VERSION;
1044 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
1048 /* load the server hello data */
1049 /* load the server random */
1050 if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
1051 al = SSL_AD_DECODE_ERROR;
1052 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1058 /* Get the session-id. */
1059 if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
1060 al = SSL_AD_DECODE_ERROR;
1061 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1064 session_id_len = PACKET_remaining(&session_id);
1065 if (session_id_len > sizeof s->session->session_id
1066 || session_id_len > SSL3_SESSION_ID_SIZE) {
1067 al = SSL_AD_ILLEGAL_PARAMETER;
1068 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
1072 if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
1073 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1074 al = SSL_AD_DECODE_ERROR;
1079 * Check if we can resume the session based on external pre-shared secret.
1080 * EAP-FAST (RFC 4851) supports two types of session resumption.
1081 * Resumption based on server-side state works with session IDs.
1082 * Resumption based on pre-shared Protected Access Credentials (PACs)
1083 * works by overriding the SessionTicket extension at the application
1084 * layer, and does not send a session ID. (We do not know whether EAP-FAST
1085 * servers would honour the session ID.) Therefore, the session ID alone
1086 * is not a reliable indicator of session resumption, so we first check if
1087 * we can resume, and later peek at the next handshake message to see if the
1088 * server wants to resume.
1090 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
1091 s->session->tlsext_tick) {
1092 const SSL_CIPHER *pref_cipher = NULL;
1093 s->session->master_key_length = sizeof(s->session->master_key);
1094 if (s->tls_session_secret_cb(s, s->session->master_key,
1095 &s->session->master_key_length,
1097 s->tls_session_secret_cb_arg)) {
1098 s->session->cipher = pref_cipher ?
1099 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
1101 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1102 al = SSL_AD_INTERNAL_ERROR;
1107 if (session_id_len != 0 && session_id_len == s->session->session_id_length
1108 && memcmp(PACKET_data(&session_id), s->session->session_id,
1109 session_id_len) == 0) {
1110 if (s->sid_ctx_length != s->session->sid_ctx_length
1111 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
1112 /* actually a client application bug */
1113 al = SSL_AD_ILLEGAL_PARAMETER;
1114 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1115 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1121 * If we were trying for session-id reuse but the server
1122 * didn't echo the ID, make a new SSL_SESSION.
1123 * In the case of EAP-FAST and PAC, we do not send a session ID,
1124 * so the PAC-based session secret is always preserved. It'll be
1125 * overwritten if the server refuses resumption.
1127 if (s->session->session_id_length > 0) {
1128 if (!ssl_get_new_session(s, 0)) {
1133 s->session->session_id_length = session_id_len;
1134 /* session_id_len could be 0 */
1135 memcpy(s->session->session_id, PACKET_data(&session_id),
1139 c = ssl_get_cipher_by_char(s, cipherchars);
1141 /* unknown cipher */
1142 al = SSL_AD_ILLEGAL_PARAMETER;
1143 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1146 /* Set version disabled mask now we know version */
1147 if (!SSL_USE_TLS1_2_CIPHERS(s))
1148 s->s3->tmp.mask_ssl = SSL_TLSV1_2;
1150 s->s3->tmp.mask_ssl = 0;
1151 /* Skip TLS v1.0 ciphersuites if SSLv3 */
1152 if ((c->algorithm_ssl & SSL_TLSV1) && s->version == SSL3_VERSION)
1153 s->s3->tmp.mask_ssl |= SSL_TLSV1;
1155 * If it is a disabled cipher we didn't send it in client hello, so
1158 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1159 al = SSL_AD_ILLEGAL_PARAMETER;
1160 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1164 sk = ssl_get_ciphers_by_id(s);
1165 i = sk_SSL_CIPHER_find(sk, c);
1167 /* we did not say we would use this cipher */
1168 al = SSL_AD_ILLEGAL_PARAMETER;
1169 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1174 * Depending on the session caching (internal/external), the cipher
1175 * and/or cipher_id values may not be set. Make sure that cipher_id is
1176 * set and use it for comparison.
1178 if (s->session->cipher)
1179 s->session->cipher_id = s->session->cipher->id;
1180 if (s->hit && (s->session->cipher_id != c->id)) {
1181 al = SSL_AD_ILLEGAL_PARAMETER;
1182 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1183 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1186 s->s3->tmp.new_cipher = c;
1187 /* lets get the compression algorithm */
1189 if (!PACKET_get_1(pkt, &compression)) {
1190 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1191 al = SSL_AD_DECODE_ERROR;
1194 #ifdef OPENSSL_NO_COMP
1195 if (compression != 0) {
1196 al = SSL_AD_ILLEGAL_PARAMETER;
1197 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1198 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1202 * If compression is disabled we'd better not try to resume a session
1203 * using compression.
1205 if (s->session->compress_meth != 0) {
1206 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1210 if (s->hit && compression != s->session->compress_meth) {
1211 al = SSL_AD_ILLEGAL_PARAMETER;
1212 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1213 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1216 if (compression == 0)
1218 else if (!ssl_allow_compression(s)) {
1219 al = SSL_AD_ILLEGAL_PARAMETER;
1220 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1223 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1226 if (compression != 0 && comp == NULL) {
1227 al = SSL_AD_ILLEGAL_PARAMETER;
1228 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1229 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1232 s->s3->tmp.new_compression = comp;
1236 /* TLS extensions */
1237 if (!ssl_parse_serverhello_tlsext(s, pkt)) {
1238 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1242 if (PACKET_remaining(pkt) != 0) {
1243 /* wrong packet length */
1244 al = SSL_AD_DECODE_ERROR;
1245 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1249 #ifndef OPENSSL_NO_SCTP
1250 if (SSL_IS_DTLS(s) && s->hit) {
1251 unsigned char sctpauthkey[64];
1252 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
1255 * Add new shared key for SCTP-Auth, will be ignored if
1258 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
1259 sizeof(DTLS1_SCTP_AUTH_LABEL));
1261 if (SSL_export_keying_material(s, sctpauthkey,
1262 sizeof(sctpauthkey),
1264 sizeof(labelbuffer), NULL, 0,
1268 BIO_ctrl(SSL_get_wbio(s),
1269 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
1270 sizeof(sctpauthkey), sctpauthkey);
1274 return MSG_PROCESS_CONTINUE_READING;
1276 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1278 ossl_statem_set_error(s);
1279 return MSG_PROCESS_ERROR;
1282 MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
1284 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
1285 unsigned long cert_list_len, cert_len;
1287 const unsigned char *certstart, *certbytes;
1288 STACK_OF(X509) *sk = NULL;
1289 EVP_PKEY *pkey = NULL;
1291 if ((sk = sk_X509_new_null()) == NULL) {
1292 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1296 if (!PACKET_get_net_3(pkt, &cert_list_len)
1297 || PACKET_remaining(pkt) != cert_list_len) {
1298 al = SSL_AD_DECODE_ERROR;
1299 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1302 while (PACKET_remaining(pkt)) {
1303 if (!PACKET_get_net_3(pkt, &cert_len)
1304 || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
1305 al = SSL_AD_DECODE_ERROR;
1306 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1307 SSL_R_CERT_LENGTH_MISMATCH);
1311 certstart = certbytes;
1312 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1314 al = SSL_AD_BAD_CERTIFICATE;
1315 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1318 if (certbytes != (certstart + cert_len)) {
1319 al = SSL_AD_DECODE_ERROR;
1320 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1321 SSL_R_CERT_LENGTH_MISMATCH);
1324 if (!sk_X509_push(sk, x)) {
1325 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1331 i = ssl_verify_cert_chain(s, sk);
1332 if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
1333 al = ssl_verify_alarm_type(s->verify_result);
1334 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1335 SSL_R_CERTIFICATE_VERIFY_FAILED);
1338 ERR_clear_error(); /* but we keep s->verify_result */
1340 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
1341 al = SSL_AD_HANDSHAKE_FAILURE;
1345 s->session->peer_chain = sk;
1347 * Inconsistency alert: cert_chain does include the peer's certificate,
1348 * which we don't include in s3_srvr.c
1350 x = sk_X509_value(sk, 0);
1353 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1356 pkey = X509_get0_pubkey(x);
1358 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1361 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1362 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1366 i = ssl_cert_type(x, pkey);
1370 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1371 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1375 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1376 if (exp_idx >= 0 && i != exp_idx
1377 && (exp_idx != SSL_PKEY_GOST_EC ||
1378 (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
1379 && i != SSL_PKEY_GOST01))) {
1381 al = SSL_AD_ILLEGAL_PARAMETER;
1382 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1383 SSL_R_WRONG_CERTIFICATE_TYPE);
1386 s->session->peer_type = i;
1388 X509_free(s->session->peer);
1390 s->session->peer = x;
1391 s->session->verify_result = s->verify_result;
1394 ret = MSG_PROCESS_CONTINUE_READING;
1398 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1400 ossl_statem_set_error(s);
1403 sk_X509_pop_free(sk, X509_free);
1407 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1412 EVP_PKEY *pkey = NULL;
1413 const EVP_MD *md = NULL;
1414 #ifndef OPENSSL_NO_RSA
1417 #ifndef OPENSSL_NO_EC
1418 EVP_PKEY_CTX *pctx = NULL;
1420 PACKET save_param_start, signature;
1422 md_ctx = EVP_MD_CTX_new();
1423 if (md_ctx == NULL) {
1424 al = SSL_AD_INTERNAL_ERROR;
1425 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1429 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1431 save_param_start = *pkt;
1433 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1434 EVP_PKEY_free(s->s3->peer_tmp);
1435 s->s3->peer_tmp = NULL;
1438 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1440 al = SSL_AD_DECODE_ERROR;
1442 #ifndef OPENSSL_NO_PSK
1443 /* PSK ciphersuites are preceded by an identity hint */
1444 if (alg_k & SSL_PSK) {
1445 PACKET psk_identity_hint;
1446 if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
1447 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1452 * Store PSK identity hint for later use, hint is used in
1453 * ssl3_send_client_key_exchange. Assume that the maximum length of
1454 * a PSK identity hint can be as long as the maximum length of a PSK
1457 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1458 al = SSL_AD_HANDSHAKE_FAILURE;
1459 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
1463 if (PACKET_remaining(&psk_identity_hint) == 0) {
1464 OPENSSL_free(s->session->psk_identity_hint);
1465 s->session->psk_identity_hint = NULL;
1466 } else if (!PACKET_strndup(&psk_identity_hint,
1467 &s->session->psk_identity_hint)) {
1468 al = SSL_AD_INTERNAL_ERROR;
1473 /* Nothing else to do for plain PSK or RSAPSK */
1474 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1476 #endif /* !OPENSSL_NO_PSK */
1478 * Dummy "if" to ensure sane C code in the event of various OPENSSL_NO_*
1483 #ifndef OPENSSL_NO_SRP
1484 else if (alg_k & SSL_kSRP) {
1485 PACKET prime, generator, salt, server_pub;
1486 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1487 || !PACKET_get_length_prefixed_2(pkt, &generator)
1488 || !PACKET_get_length_prefixed_1(pkt, &salt)
1489 || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
1490 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1495 BN_bin2bn(PACKET_data(&prime),
1496 PACKET_remaining(&prime), NULL)) == NULL
1498 BN_bin2bn(PACKET_data(&generator),
1499 PACKET_remaining(&generator), NULL)) == NULL
1501 BN_bin2bn(PACKET_data(&salt),
1502 PACKET_remaining(&salt), NULL)) == NULL
1504 BN_bin2bn(PACKET_data(&server_pub),
1505 PACKET_remaining(&server_pub), NULL)) == NULL) {
1506 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
1510 if (!srp_verify_server_param(s, &al)) {
1511 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
1515 /* We must check if there is a certificate */
1516 if (alg_a & (SSL_aRSA|SSL_aDSS))
1517 pkey = X509_get0_pubkey(s->session->peer);
1519 #endif /* !OPENSSL_NO_SRP */
1520 #ifndef OPENSSL_NO_DH
1521 else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1522 PACKET prime, generator, pub_key;
1526 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1527 || !PACKET_get_length_prefixed_2(pkt, &generator)
1528 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1529 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1533 s->s3->peer_tmp = EVP_PKEY_new();
1536 if (s->s3->peer_tmp == NULL || dh == NULL) {
1537 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1542 if (EVP_PKEY_assign_DH(s->s3->peer_tmp, dh) == 0) {
1543 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1548 if ((dh->p = BN_bin2bn(PACKET_data(&prime),
1549 PACKET_remaining(&prime), NULL)) == NULL
1550 || (dh->g = BN_bin2bn(PACKET_data(&generator),
1551 PACKET_remaining(&generator), NULL)) == NULL
1553 BN_bin2bn(PACKET_data(&pub_key),
1554 PACKET_remaining(&pub_key), NULL)) == NULL) {
1555 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
1559 if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) {
1560 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE);
1564 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1565 al = SSL_AD_HANDSHAKE_FAILURE;
1566 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
1569 if (alg_a & (SSL_aRSA|SSL_aDSS))
1570 pkey = X509_get0_pubkey(s->session->peer);
1571 /* else anonymous DH, so no certificate or pkey. */
1573 #endif /* !OPENSSL_NO_DH */
1575 #ifndef OPENSSL_NO_EC
1576 else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1578 const unsigned char *ecparams;
1582 * Extract elliptic curve parameters and the server's ephemeral ECDH
1583 * public key. For now we only support named (not generic) curves and
1584 * ECParameters in this case is just three bytes.
1586 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1587 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1591 * Check curve is one of our preferences, if not server has sent an
1592 * invalid curve. ECParameters is 3 bytes.
1594 if (!tls1_check_curve(s, ecparams, 3)) {
1595 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
1599 curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2));
1600 if (curve_nid == 0) {
1601 al = SSL_AD_INTERNAL_ERROR;
1602 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1603 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1607 /* Set up EVP_PKEY with named curve as parameters */
1608 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
1610 || EVP_PKEY_paramgen_init(pctx) <= 0
1611 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
1612 || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
1613 al = SSL_AD_INTERNAL_ERROR;
1614 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1617 EVP_PKEY_CTX_free(pctx);
1620 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1621 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1625 if (EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(s->s3->peer_tmp),
1626 PACKET_data(&encoded_pt),
1627 PACKET_remaining(&encoded_pt), NULL) == 0) {
1628 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
1633 * The ECC/TLS specification does not mention the use of DSA to sign
1634 * ECParameters in the server key exchange message. We do support RSA
1638 # ifndef OPENSSL_NO_RSA
1639 else if (alg_a & SSL_aRSA)
1640 pkey = X509_get0_pubkey(s->session->peer);
1642 # ifndef OPENSSL_NO_EC
1643 else if (alg_a & SSL_aECDSA)
1644 pkey = X509_get0_pubkey(s->session->peer);
1646 /* else anonymous ECDH, so no certificate or pkey. */
1648 al = SSL_AD_UNEXPECTED_MESSAGE;
1649 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1652 #endif /* !OPENSSL_NO_EC */
1654 /* if it was signed, check the signature */
1658 * |pkt| now points to the beginning of the signature, so the difference
1659 * equals the length of the parameters.
1661 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1662 PACKET_remaining(&save_param_start) -
1663 PACKET_remaining(pkt))) {
1664 al = SSL_AD_INTERNAL_ERROR;
1665 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1669 if (SSL_USE_SIGALGS(s)) {
1670 const unsigned char *sigalgs;
1672 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1673 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1676 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1683 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1685 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
1686 md = EVP_md5_sha1();
1691 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1692 || PACKET_remaining(pkt) != 0) {
1693 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1696 j = EVP_PKEY_size(pkey);
1698 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1703 * Check signature length
1705 if (PACKET_remaining(&signature) > (size_t)j) {
1706 /* wrong packet length */
1707 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1710 if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
1711 || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
1712 SSL3_RANDOM_SIZE) <= 0
1713 || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
1714 SSL3_RANDOM_SIZE) <= 0
1715 || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
1716 PACKET_remaining(¶ms)) <= 0) {
1717 al = SSL_AD_INTERNAL_ERROR;
1718 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1721 if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
1722 PACKET_remaining(&signature), pkey) <= 0) {
1724 al = SSL_AD_DECRYPT_ERROR;
1725 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1729 /* aNULL, aSRP or PSK do not need public keys */
1730 if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) {
1731 /* Might be wrong key type, check it */
1732 if (ssl3_check_cert_and_algorithm(s))
1733 /* Otherwise this shouldn't happen */
1734 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1737 /* still data left over */
1738 if (PACKET_remaining(pkt) != 0) {
1739 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1743 EVP_MD_CTX_free(md_ctx);
1744 return MSG_PROCESS_CONTINUE_READING;
1746 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1748 #ifndef OPENSSL_NO_RSA
1751 #ifndef OPENSSL_NO_EC
1752 EVP_PKEY_CTX_free(pctx);
1754 EVP_MD_CTX_free(md_ctx);
1755 ossl_statem_set_error(s);
1756 return MSG_PROCESS_ERROR;
1759 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
1761 int ret = MSG_PROCESS_ERROR;
1762 unsigned int list_len, ctype_num, i, name_len;
1763 X509_NAME *xn = NULL;
1764 const unsigned char *data;
1765 const unsigned char *namestart, *namebytes;
1766 STACK_OF(X509_NAME) *ca_sk = NULL;
1768 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1769 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1773 /* get the certificate types */
1774 if (!PACKET_get_1(pkt, &ctype_num)
1775 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
1776 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1777 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1780 OPENSSL_free(s->cert->ctypes);
1781 s->cert->ctypes = NULL;
1782 if (ctype_num > SSL3_CT_NUMBER) {
1783 /* If we exceed static buffer copy all to cert structure */
1784 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1785 if (s->cert->ctypes == NULL) {
1786 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1789 memcpy(s->cert->ctypes, data, ctype_num);
1790 s->cert->ctype_num = (size_t)ctype_num;
1791 ctype_num = SSL3_CT_NUMBER;
1793 for (i = 0; i < ctype_num; i++)
1794 s->s3->tmp.ctype[i] = data[i];
1796 if (SSL_USE_SIGALGS(s)) {
1797 if (!PACKET_get_net_2(pkt, &list_len)
1798 || !PACKET_get_bytes(pkt, &data, list_len)) {
1799 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1800 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1801 SSL_R_LENGTH_MISMATCH);
1805 /* Clear certificate digests and validity flags */
1806 for (i = 0; i < SSL_PKEY_NUM; i++) {
1807 s->s3->tmp.md[i] = NULL;
1808 s->s3->tmp.valid_flags[i] = 0;
1810 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1811 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1812 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1813 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1816 if (!tls1_process_sigalgs(s)) {
1817 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1818 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1822 ssl_set_default_md(s);
1825 /* get the CA RDNs */
1826 if (!PACKET_get_net_2(pkt, &list_len)
1827 || PACKET_remaining(pkt) != list_len) {
1828 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1829 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1833 while (PACKET_remaining(pkt)) {
1834 if (!PACKET_get_net_2(pkt, &name_len)
1835 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
1836 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1837 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1838 SSL_R_LENGTH_MISMATCH);
1842 namestart = namebytes;
1844 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
1845 name_len)) == NULL) {
1846 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1847 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1851 if (namebytes != (namestart + name_len)) {
1852 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1853 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1854 SSL_R_CA_DN_LENGTH_MISMATCH);
1857 if (!sk_X509_NAME_push(ca_sk, xn)) {
1858 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1863 /* we should setup a certificate to return.... */
1864 s->s3->tmp.cert_req = 1;
1865 s->s3->tmp.ctype_num = ctype_num;
1866 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1867 s->s3->tmp.ca_names = ca_sk;
1870 ret = MSG_PROCESS_CONTINUE_READING;
1873 ossl_statem_set_error(s);
1875 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1879 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
1881 return (X509_NAME_cmp(*a, *b));
1884 MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
1887 unsigned int ticklen;
1888 unsigned long ticket_lifetime_hint;
1890 if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
1891 || !PACKET_get_net_2(pkt, &ticklen)
1892 || PACKET_remaining(pkt) != ticklen) {
1893 al = SSL_AD_DECODE_ERROR;
1894 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1898 /* Server is allowed to change its mind and send an empty ticket. */
1900 return MSG_PROCESS_CONTINUE_READING;
1902 if (s->session->session_id_length > 0) {
1903 int i = s->session_ctx->session_cache_mode;
1904 SSL_SESSION *new_sess;
1906 * We reused an existing session, so we need to replace it with a new
1909 if (i & SSL_SESS_CACHE_CLIENT) {
1911 * Remove the old session from the cache
1913 if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) {
1914 if (s->session_ctx->remove_session_cb != NULL)
1915 s->session_ctx->remove_session_cb(s->session_ctx,
1918 /* We carry on if this fails */
1919 SSL_CTX_remove_session(s->session_ctx, s->session);
1923 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1924 al = SSL_AD_INTERNAL_ERROR;
1925 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1929 SSL_SESSION_free(s->session);
1930 s->session = new_sess;
1933 OPENSSL_free(s->session->tlsext_tick);
1934 s->session->tlsext_ticklen = 0;
1936 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1937 if (s->session->tlsext_tick == NULL) {
1938 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1941 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
1942 al = SSL_AD_DECODE_ERROR;
1943 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1947 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
1948 s->session->tlsext_ticklen = ticklen;
1950 * There are two ways to detect a resumed ticket session. One is to set
1951 * an appropriate session ID and then the server must return a match in
1952 * ServerHello. This allows the normal client session ID matching to work
1953 * and we know much earlier that the ticket has been accepted. The
1954 * other way is to set zero length session ID when the ticket is
1955 * presented and rely on the handshake to determine session resumption.
1956 * We choose the former approach because this fits in with assumptions
1957 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1958 * SHA256 is disabled) hash of the ticket.
1960 EVP_Digest(s->session->tlsext_tick, ticklen,
1961 s->session->session_id, &s->session->session_id_length,
1962 EVP_sha256(), NULL);
1963 return MSG_PROCESS_CONTINUE_READING;
1965 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1967 ossl_statem_set_error(s);
1968 return MSG_PROCESS_ERROR;
1971 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
1974 unsigned long resplen;
1977 if (!PACKET_get_1(pkt, &type)
1978 || type != TLSEXT_STATUSTYPE_ocsp) {
1979 al = SSL_AD_DECODE_ERROR;
1980 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1983 if (!PACKET_get_net_3(pkt, &resplen)
1984 || PACKET_remaining(pkt) != resplen) {
1985 al = SSL_AD_DECODE_ERROR;
1986 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1989 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
1990 if (s->tlsext_ocsp_resp == NULL) {
1991 al = SSL_AD_INTERNAL_ERROR;
1992 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1995 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
1996 al = SSL_AD_DECODE_ERROR;
1997 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
2000 s->tlsext_ocsp_resplen = resplen;
2001 return MSG_PROCESS_CONTINUE_READING;
2003 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2004 ossl_statem_set_error(s);
2005 return MSG_PROCESS_ERROR;
2008 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
2010 if (PACKET_remaining(pkt) > 0) {
2011 /* should contain no data */
2012 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2013 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2014 ossl_statem_set_error(s);
2015 return MSG_PROCESS_ERROR;
2018 #ifndef OPENSSL_NO_SRP
2019 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2020 if (SRP_Calc_A_param(s) <= 0) {
2021 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2022 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2023 ossl_statem_set_error(s);
2024 return MSG_PROCESS_ERROR;
2030 * at this point we check that we have the required stuff from
2033 if (!ssl3_check_cert_and_algorithm(s)) {
2034 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2035 ossl_statem_set_error(s);
2036 return MSG_PROCESS_ERROR;
2040 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2041 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2042 * message, or NULL and -1 otherwise
2044 if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
2046 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2048 ssl3_send_alert(s, SSL3_AL_FATAL,
2049 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
2050 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
2051 SSL_R_INVALID_STATUS_RESPONSE);
2052 return MSG_PROCESS_ERROR;
2055 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2056 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
2057 return MSG_PROCESS_ERROR;
2061 #ifndef OPENSSL_NO_CT
2062 if (s->ct_validation_callback != NULL) {
2063 if (!SSL_validate_ct(s)) {
2064 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2065 return MSG_PROCESS_ERROR;
2070 #ifndef OPENSSL_NO_SCTP
2071 /* Only applies to renegotiation */
2072 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2073 && s->renegotiate != 0)
2074 return MSG_PROCESS_CONTINUE_PROCESSING;
2077 return MSG_PROCESS_FINISHED_READING;
2080 int tls_construct_client_key_exchange(SSL *s)
2084 #ifndef OPENSSL_NO_PSK
2085 size_t pskhdrlen = 0;
2087 unsigned long alg_k;
2088 #ifndef OPENSSL_NO_RSA
2090 EVP_PKEY *pkey = NULL;
2091 EVP_PKEY_CTX *pctx = NULL;
2093 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
2094 EVP_PKEY *ckey = NULL, *skey = NULL;
2096 #ifndef OPENSSL_NO_EC
2097 unsigned char *encodedPoint = NULL;
2098 int encoded_pt_len = 0;
2100 unsigned char *pms = NULL;
2102 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2104 p = ssl_handshake_start(s);
2107 #ifndef OPENSSL_NO_PSK
2108 if (alg_k & SSL_PSK) {
2111 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2112 * \0-terminated identity. The last byte is for us for simulating
2115 char identity[PSK_MAX_IDENTITY_LEN + 1];
2117 unsigned char psk[PSK_MAX_PSK_LEN];
2120 if (s->psk_client_callback == NULL) {
2121 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2122 SSL_R_PSK_NO_CLIENT_CB);
2126 memset(identity, 0, sizeof(identity));
2128 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2129 identity, sizeof(identity) - 1,
2132 if (psklen > PSK_MAX_PSK_LEN) {
2133 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2134 ERR_R_INTERNAL_ERROR);
2136 } else if (psklen == 0) {
2137 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2138 SSL_R_PSK_IDENTITY_NOT_FOUND);
2141 OPENSSL_free(s->s3->tmp.psk);
2142 s->s3->tmp.psk = OPENSSL_memdup(psk, psklen);
2143 OPENSSL_cleanse(psk, psklen);
2145 if (s->s3->tmp.psk == NULL) {
2146 OPENSSL_cleanse(identity, sizeof(identity));
2150 s->s3->tmp.psklen = psklen;
2151 identitylen = strlen(identity);
2152 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2153 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2154 ERR_R_INTERNAL_ERROR);
2157 OPENSSL_free(s->session->psk_identity);
2158 s->session->psk_identity = OPENSSL_strdup(identity);
2159 if (s->session->psk_identity == NULL) {
2160 OPENSSL_cleanse(identity, sizeof(identity));
2164 s2n(identitylen, p);
2165 memcpy(p, identity, identitylen);
2166 pskhdrlen = 2 + identitylen;
2170 OPENSSL_cleanse(identity, sizeof(identity));
2172 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2176 if (alg_k & SSL_kPSK) {
2181 /* Fool emacs indentation */
2184 #ifndef OPENSSL_NO_RSA
2185 else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2187 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2188 pms = OPENSSL_malloc(pmslen);
2192 if (s->session->peer == NULL) {
2194 * We should always have a server certificate with SSL_kRSA.
2196 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2197 ERR_R_INTERNAL_ERROR);
2201 pkey = X509_get0_pubkey(s->session->peer);
2202 if (EVP_PKEY_get0_RSA(pkey) == NULL) {
2203 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2204 ERR_R_INTERNAL_ERROR);
2208 pms[0] = s->client_version >> 8;
2209 pms[1] = s->client_version & 0xff;
2210 if (RAND_bytes(pms + 2, pmslen - 2) <= 0)
2214 /* Fix buf for TLS and beyond */
2215 if (s->version > SSL3_VERSION)
2217 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2218 if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
2219 || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
2220 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2224 if (EVP_PKEY_encrypt(pctx, p, &enclen, pms, pmslen) <= 0) {
2225 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2226 SSL_R_BAD_RSA_ENCRYPT);
2230 EVP_PKEY_CTX_free(pctx);
2233 if (s->options & SSL_OP_PKCS1_CHECK_1)
2235 if (s->options & SSL_OP_PKCS1_CHECK_2)
2239 /* Fix buf for TLS and beyond */
2240 if (s->version > SSL3_VERSION) {
2246 #ifndef OPENSSL_NO_DH
2247 else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
2249 skey = s->s3->peer_tmp;
2251 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2252 ERR_R_INTERNAL_ERROR);
2255 ckey = ssl_generate_pkey(skey, NID_undef);
2256 dh_clnt = EVP_PKEY_get0_DH(ckey);
2258 if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) {
2259 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2260 ERR_R_INTERNAL_ERROR);
2265 /* send off the data */
2266 n = BN_num_bytes(dh_clnt->pub_key);
2268 BN_bn2bin(dh_clnt->pub_key, p);
2270 EVP_PKEY_free(ckey);
2275 #ifndef OPENSSL_NO_EC
2276 else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
2278 skey = s->s3->peer_tmp;
2279 if ((skey == NULL) || EVP_PKEY_get0_EC_KEY(skey) == NULL) {
2280 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2281 ERR_R_INTERNAL_ERROR);
2285 ckey = ssl_generate_pkey(skey, NID_undef);
2287 if (ssl_derive(s, ckey, skey) == 0) {
2288 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EVP_LIB);
2292 /* Generate encoding of client key */
2293 encoded_pt_len = EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(ckey),
2294 POINT_CONVERSION_UNCOMPRESSED,
2295 &encodedPoint, NULL);
2297 if (encoded_pt_len == 0) {
2298 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
2302 EVP_PKEY_free(ckey);
2307 *p = n; /* length of encoded point */
2308 /* Encoded point will be copied here */
2310 /* copy the point */
2311 memcpy(p, encodedPoint, n);
2312 /* increment n to account for length field */
2315 /* Free allocated memory */
2316 OPENSSL_free(encodedPoint);
2318 #endif /* !OPENSSL_NO_EC */
2319 #ifndef OPENSSL_NO_GOST
2320 else if (alg_k & SSL_kGOST) {
2321 /* GOST key exchange message creation */
2322 EVP_PKEY_CTX *pkey_ctx;
2325 unsigned int md_len;
2326 unsigned char shared_ukm[32], tmp[256];
2327 EVP_MD_CTX *ukm_hash;
2328 int dgst_nid = NID_id_GostR3411_94;
2329 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2330 dgst_nid = NID_id_GostR3411_2012_256;
2334 pms = OPENSSL_malloc(pmslen);
2339 * Get server sertificate PKEY and create ctx from it
2341 peer_cert = s->session->peer;
2343 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2344 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2348 pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
2349 if (pkey_ctx == NULL) {
2350 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2351 ERR_R_MALLOC_FAILURE);
2355 * If we have send a certificate, and certificate key
2356 * parameters match those of server certificate, use
2357 * certificate key for key exchange
2360 /* Otherwise, generate ephemeral key pair */
2362 if (pkey_ctx == NULL
2363 || EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2364 /* Generate session key */
2365 || RAND_bytes(pms, pmslen) <= 0) {
2366 EVP_PKEY_CTX_free(pkey_ctx);
2367 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2368 ERR_R_INTERNAL_ERROR);
2372 * If we have client certificate, use its secret as peer key
2374 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2375 if (EVP_PKEY_derive_set_peer
2376 (pkey_ctx, s->cert->key->privatekey) <= 0) {
2378 * If there was an error - just ignore it. Ephemeral key
2385 * Compute shared IV and store it in algorithm-specific context
2388 ukm_hash = EVP_MD_CTX_new();
2389 if (EVP_DigestInit(ukm_hash,
2390 EVP_get_digestbynid(dgst_nid)) <= 0
2391 || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2392 SSL3_RANDOM_SIZE) <= 0
2393 || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2394 SSL3_RANDOM_SIZE) <= 0
2395 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
2396 EVP_MD_CTX_free(ukm_hash);
2397 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2398 ERR_R_INTERNAL_ERROR);
2401 EVP_MD_CTX_free(ukm_hash);
2402 if (EVP_PKEY_CTX_ctrl
2403 (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8,
2405 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2409 /* Make GOST keytransport blob message */
2411 * Encapsulate it into sequence
2413 *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2415 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
2416 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2420 if (msglen >= 0x80) {
2422 *(p++) = msglen & 0xff;
2425 *(p++) = msglen & 0xff;
2428 memcpy(p, tmp, msglen);
2429 /* Check if pubkey from client certificate was used */
2430 if (EVP_PKEY_CTX_ctrl
2431 (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) {
2432 /* Set flag "skip certificate verify" */
2433 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2435 EVP_PKEY_CTX_free(pkey_ctx);
2439 #ifndef OPENSSL_NO_SRP
2440 else if (alg_k & SSL_kSRP) {
2441 if (s->srp_ctx.A != NULL) {
2442 /* send off the data */
2443 n = BN_num_bytes(s->srp_ctx.A);
2445 BN_bn2bin(s->srp_ctx.A, p);
2448 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2449 ERR_R_INTERNAL_ERROR);
2452 OPENSSL_free(s->session->srp_username);
2453 s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
2454 if (s->session->srp_username == NULL) {
2455 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
2456 ERR_R_MALLOC_FAILURE);
2462 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2463 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2467 #ifndef OPENSSL_NO_PSK
2471 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) {
2472 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2473 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2478 s->s3->tmp.pms = pms;
2479 s->s3->tmp.pmslen = pmslen;
2484 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2485 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
2487 OPENSSL_clear_free(pms, pmslen);
2488 s->s3->tmp.pms = NULL;
2489 #ifndef OPENSSL_NO_RSA
2490 EVP_PKEY_CTX_free(pctx);
2492 #ifndef OPENSSL_NO_EC
2493 OPENSSL_free(encodedPoint);
2495 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
2496 EVP_PKEY_free(ckey);
2498 #ifndef OPENSSL_NO_PSK
2499 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2500 s->s3->tmp.psk = NULL;
2502 ossl_statem_set_error(s);
2506 int tls_client_key_exchange_post_work(SSL *s)
2508 unsigned char *pms = NULL;
2511 #ifndef OPENSSL_NO_SRP
2513 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2514 if (!srp_generate_client_master_secret(s)) {
2515 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2516 ERR_R_INTERNAL_ERROR);
2522 pms = s->s3->tmp.pms;
2523 pmslen = s->s3->tmp.pmslen;
2525 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2526 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2527 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2530 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2531 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2532 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2536 #ifndef OPENSSL_NO_SCTP
2537 if (SSL_IS_DTLS(s)) {
2538 unsigned char sctpauthkey[64];
2539 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2542 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2545 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
2546 sizeof(DTLS1_SCTP_AUTH_LABEL));
2548 if (SSL_export_keying_material(s, sctpauthkey,
2549 sizeof(sctpauthkey), labelbuffer,
2550 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2553 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2554 sizeof(sctpauthkey), sctpauthkey);
2560 OPENSSL_clear_free(pms, pmslen);
2561 s->s3->tmp.pms = NULL;
2565 int tls_construct_client_verify(SSL *s)
2569 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2572 unsigned long n = 0;
2576 mctx = EVP_MD_CTX_new();
2578 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2582 p = ssl_handshake_start(s);
2583 pkey = s->cert->key->privatekey;
2585 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2586 if (hdatalen <= 0) {
2587 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2590 if (SSL_USE_SIGALGS(s)) {
2591 if (!tls12_get_sigandhash(p, pkey, md)) {
2592 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2599 fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
2601 if (!EVP_SignInit_ex(mctx, md, NULL)
2602 || !EVP_SignUpdate(mctx, hdata, hdatalen)
2603 || (s->version == SSL3_VERSION
2604 && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
2605 s->session->master_key_length,
2606 s->session->master_key))
2607 || !EVP_SignFinal(mctx, p + 2, &u, pkey)) {
2608 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
2611 #ifndef OPENSSL_NO_GOST
2613 int pktype = EVP_PKEY_id(pkey);
2614 if (pktype == NID_id_GostR3410_2001
2615 || pktype == NID_id_GostR3410_2012_256
2616 || pktype == NID_id_GostR3410_2012_512)
2617 BUF_reverse(p + 2, NULL, u);
2623 /* Digest cached records and discard handshake buffer */
2624 if (!ssl3_digest_cached_records(s, 0))
2626 if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
2627 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2631 EVP_MD_CTX_free(mctx);
2634 EVP_MD_CTX_free(mctx);
2639 * Check a certificate can be used for client authentication. Currently check
2640 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2641 * certificates can be used and optionally checks suitability for Suite B.
2643 static int ssl3_check_client_certificate(SSL *s)
2645 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
2647 /* If no suitable signature algorithm can't use certificate */
2648 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
2651 * If strict mode check suitability of chain before using it. This also
2652 * adjusts suite B digest if necessary.
2654 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
2655 !tls1_check_chain(s, NULL, NULL, NULL, -2))
2660 WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
2663 EVP_PKEY *pkey = NULL;
2666 if (wst == WORK_MORE_A) {
2667 /* Let cert callback update client certificates if required */
2668 if (s->cert->cert_cb) {
2669 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
2671 s->rwstate = SSL_X509_LOOKUP;
2675 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2676 ossl_statem_set_error(s);
2679 s->rwstate = SSL_NOTHING;
2681 if (ssl3_check_client_certificate(s))
2682 return WORK_FINISHED_CONTINUE;
2684 /* Fall through to WORK_MORE_B */
2688 /* We need to get a client cert */
2689 if (wst == WORK_MORE_B) {
2691 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2692 * return(-1); We then get retied later
2694 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2696 s->rwstate = SSL_X509_LOOKUP;
2699 s->rwstate = SSL_NOTHING;
2700 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2701 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2703 } else if (i == 1) {
2705 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
2706 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2710 EVP_PKEY_free(pkey);
2711 if (i && !ssl3_check_client_certificate(s))
2714 if (s->version == SSL3_VERSION) {
2715 s->s3->tmp.cert_req = 0;
2716 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2717 return WORK_FINISHED_CONTINUE;
2719 s->s3->tmp.cert_req = 2;
2720 if (!ssl3_digest_cached_records(s, 0)) {
2721 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2722 ossl_statem_set_error(s);
2728 return WORK_FINISHED_CONTINUE;
2731 /* Shouldn't ever get here */
2735 int tls_construct_client_certificate(SSL *s)
2737 if (!ssl3_output_cert_chain(s,
2738 (s->s3->tmp.cert_req ==
2739 2) ? NULL : s->cert->key)) {
2740 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
2741 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2742 ossl_statem_set_error(s);
2749 #define has_bits(i,m) (((i)&(m)) == (m))
2751 int ssl3_check_cert_and_algorithm(SSL *s)
2754 #ifndef OPENSSL_NO_EC
2758 EVP_PKEY *pkey = NULL;
2759 int al = SSL_AD_HANDSHAKE_FAILURE;
2761 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2762 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2764 /* we don't have a certificate */
2765 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
2768 /* This is the passed certificate */
2770 #ifndef OPENSSL_NO_EC
2771 idx = s->session->peer_type;
2772 if (idx == SSL_PKEY_ECC) {
2773 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
2775 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2780 } else if (alg_a & SSL_aECDSA) {
2781 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2782 SSL_R_MISSING_ECDSA_SIGNING_CERT);
2786 pkey = X509_get0_pubkey(s->session->peer);
2787 i = X509_certificate_type(s->session->peer, pkey);
2789 /* Check that we have a certificate if we require one */
2790 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2791 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2792 SSL_R_MISSING_RSA_SIGNING_CERT);
2795 #ifndef OPENSSL_NO_DSA
2796 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2797 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2798 SSL_R_MISSING_DSA_SIGNING_CERT);
2802 #ifndef OPENSSL_NO_RSA
2803 if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
2804 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2805 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2806 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2810 #ifndef OPENSSL_NO_DH
2811 if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
2812 al = SSL_AD_INTERNAL_ERROR;
2813 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
2820 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2824 #ifndef OPENSSL_NO_NEXTPROTONEG
2825 int tls_construct_next_proto(SSL *s)
2827 unsigned int len, padding_len;
2830 len = s->next_proto_negotiated_len;
2831 padding_len = 32 - ((len + 2) % 32);
2832 d = (unsigned char *)s->init_buf->data;
2834 memcpy(d + 5, s->next_proto_negotiated, len);
2835 d[5 + len] = padding_len;
2836 memset(d + 6 + len, 0, padding_len);
2837 *(d++) = SSL3_MT_NEXT_PROTO;
2838 l2n3(2 + len + padding_len, d);
2839 s->init_num = 4 + 2 + len + padding_len;
2846 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2849 #ifndef OPENSSL_NO_ENGINE
2850 if (s->ctx->client_cert_engine) {
2851 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2852 SSL_get_client_CA_list(s),
2853 px509, ppkey, NULL, NULL, NULL);
2858 if (s->ctx->client_cert_cb)
2859 i = s->ctx->client_cert_cb(s, px509, ppkey);
2863 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
2867 const SSL_CIPHER *c;
2869 int empty_reneg_info_scsv = !s->renegotiate;
2870 /* Set disabled masks for this session */
2871 ssl_set_client_disabled(s);
2877 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
2878 c = sk_SSL_CIPHER_value(sk, i);
2879 /* Skip disabled ciphers */
2880 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
2882 j = s->method->put_cipher_by_char(c, p);
2886 * If p == q, no ciphers; caller indicates an error. Otherwise, add
2890 if (empty_reneg_info_scsv) {
2891 static SSL_CIPHER scsv = {
2892 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2894 j = s->method->put_cipher_by_char(&scsv, p);
2897 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
2898 static SSL_CIPHER scsv = {
2899 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2901 j = s->method->put_cipher_by_char(&scsv, p);