2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* ====================================================================
11 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
13 * Portions of the attached software ("Contribution") are developed by
14 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
16 * The Contribution is licensed pursuant to the OpenSSL open source
17 * license provided above.
19 * ECC cipher suite support in OpenSSL originally written by
20 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
23 /* ====================================================================
24 * Copyright 2005 Nokia. All rights reserved.
26 * The portions of the attached software ("Contribution") is developed by
27 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
30 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
31 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
32 * support (see RFC 4279) to OpenSSL.
34 * No patent licenses or other rights except those expressly stated in
35 * the OpenSSL open source license shall be deemed granted or received
36 * expressly, by implication, estoppel, or otherwise.
38 * No assurances are provided by Nokia that the Contribution does not
39 * infringe the patent or other intellectual property rights of any third
40 * party or that the license provides you with all the necessary rights
41 * to make use of the Contribution.
43 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
44 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
45 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
46 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
51 #include "../ssl_locl.h"
52 #include "statem_locl.h"
53 #include <openssl/buffer.h>
54 #include <openssl/rand.h>
55 #include <openssl/objects.h>
56 #include <openssl/evp.h>
57 #include <openssl/md5.h>
58 #include <openssl/dh.h>
59 #include <openssl/bn.h>
60 #include <openssl/engine.h>
62 static ossl_inline int cert_req_allowed(SSL *s);
63 static int key_exchange_expected(SSL *s);
64 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
65 static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
69 * Is a CertificateRequest message allowed at the moment or not?
75 static ossl_inline int cert_req_allowed(SSL *s)
77 /* TLS does not like anon-DH with client cert */
78 if ((s->version > SSL3_VERSION
79 && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
80 || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK)))
87 * Should we expect the ServerKeyExchange message or not?
93 static int key_exchange_expected(SSL *s)
95 long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
98 * Can't skip server key exchange if this is an ephemeral
99 * ciphersuite or for SRP
101 if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK
110 * ossl_statem_client_read_transition() encapsulates the logic for the allowed
111 * handshake state transitions when the client is reading messages from the
112 * server. The message type that the server has sent is provided in |mt|. The
113 * current state is in |s->statem.hand_state|.
116 * 1: Success (transition allowed)
117 * 0: Error (transition not allowed)
119 int ossl_statem_client_read_transition(SSL *s, int mt)
121 OSSL_STATEM *st = &s->statem;
124 switch (st->hand_state) {
128 case TLS_ST_CW_CLNT_HELLO:
129 if (mt == SSL3_MT_SERVER_HELLO) {
130 st->hand_state = TLS_ST_CR_SRVR_HELLO;
134 if (SSL_IS_DTLS(s)) {
135 if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
136 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
142 case TLS_ST_CR_SRVR_HELLO:
144 if (s->tlsext_ticket_expected) {
145 if (mt == SSL3_MT_NEWSESSION_TICKET) {
146 st->hand_state = TLS_ST_CR_SESSION_TICKET;
149 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
150 st->hand_state = TLS_ST_CR_CHANGE;
154 if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
155 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
157 } else if (s->version >= TLS1_VERSION
158 && s->tls_session_secret_cb != NULL
159 && s->session->tlsext_tick != NULL
160 && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
162 * Normally, we can tell if the server is resuming the session
163 * from the session ID. EAP-FAST (RFC 4851), however, relies on
164 * the next server message after the ServerHello to determine if
165 * the server is resuming.
168 st->hand_state = TLS_ST_CR_CHANGE;
170 } else if (!(s->s3->tmp.new_cipher->algorithm_auth
171 & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
172 if (mt == SSL3_MT_CERTIFICATE) {
173 st->hand_state = TLS_ST_CR_CERT;
177 ske_expected = key_exchange_expected(s);
178 /* SKE is optional for some PSK ciphersuites */
180 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
181 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
182 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
183 st->hand_state = TLS_ST_CR_KEY_EXCH;
186 } else if (mt == SSL3_MT_CERTIFICATE_REQUEST
187 && cert_req_allowed(s)) {
188 st->hand_state = TLS_ST_CR_CERT_REQ;
190 } else if (mt == SSL3_MT_SERVER_DONE) {
191 st->hand_state = TLS_ST_CR_SRVR_DONE;
200 * The CertificateStatus message is optional even if
201 * |tlsext_status_expected| is set
203 if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
204 st->hand_state = TLS_ST_CR_CERT_STATUS;
209 case TLS_ST_CR_CERT_STATUS:
210 ske_expected = key_exchange_expected(s);
211 /* SKE is optional for some PSK ciphersuites */
212 if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
213 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
214 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
215 st->hand_state = TLS_ST_CR_KEY_EXCH;
222 case TLS_ST_CR_KEY_EXCH:
223 if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
224 if (cert_req_allowed(s)) {
225 st->hand_state = TLS_ST_CR_CERT_REQ;
232 case TLS_ST_CR_CERT_REQ:
233 if (mt == SSL3_MT_SERVER_DONE) {
234 st->hand_state = TLS_ST_CR_SRVR_DONE;
239 case TLS_ST_CW_FINISHED:
240 if (s->tlsext_ticket_expected) {
241 if (mt == SSL3_MT_NEWSESSION_TICKET) {
242 st->hand_state = TLS_ST_CR_SESSION_TICKET;
245 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
246 st->hand_state = TLS_ST_CR_CHANGE;
251 case TLS_ST_CR_SESSION_TICKET:
252 if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
253 st->hand_state = TLS_ST_CR_CHANGE;
258 case TLS_ST_CR_CHANGE:
259 if (mt == SSL3_MT_FINISHED) {
260 st->hand_state = TLS_ST_CR_FINISHED;
267 /* No valid transition found */
268 ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE);
269 SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE);
274 * client_write_transition() works out what handshake state to move to next
275 * when the client is writing messages to be sent to the server.
277 WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
279 OSSL_STATEM *st = &s->statem;
281 switch (st->hand_state) {
283 /* Shouldn't happen */
284 return WRITE_TRAN_ERROR;
287 /* Renegotiation - fall through */
289 st->hand_state = TLS_ST_CW_CLNT_HELLO;
290 return WRITE_TRAN_CONTINUE;
292 case TLS_ST_CW_CLNT_HELLO:
294 * No transition at the end of writing because we don't know what
297 return WRITE_TRAN_FINISHED;
299 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
300 st->hand_state = TLS_ST_CW_CLNT_HELLO;
301 return WRITE_TRAN_CONTINUE;
303 case TLS_ST_CR_SRVR_DONE:
304 if (s->s3->tmp.cert_req)
305 st->hand_state = TLS_ST_CW_CERT;
307 st->hand_state = TLS_ST_CW_KEY_EXCH;
308 return WRITE_TRAN_CONTINUE;
311 st->hand_state = TLS_ST_CW_KEY_EXCH;
312 return WRITE_TRAN_CONTINUE;
314 case TLS_ST_CW_KEY_EXCH:
316 * For TLS, cert_req is set to 2, so a cert chain of nothing is
317 * sent, but no verify packet is sent
320 * XXX: For now, we do not support client authentication in ECDH
321 * cipher suites with ECDH (rather than ECDSA) certificates. We
322 * need to skip the certificate verify message when client's
323 * ECDH public key is sent inside the client certificate.
325 if (s->s3->tmp.cert_req == 1) {
326 st->hand_state = TLS_ST_CW_CERT_VRFY;
328 st->hand_state = TLS_ST_CW_CHANGE;
330 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
331 st->hand_state = TLS_ST_CW_CHANGE;
333 return WRITE_TRAN_CONTINUE;
335 case TLS_ST_CW_CERT_VRFY:
336 st->hand_state = TLS_ST_CW_CHANGE;
337 return WRITE_TRAN_CONTINUE;
339 case TLS_ST_CW_CHANGE:
340 #if defined(OPENSSL_NO_NEXTPROTONEG)
341 st->hand_state = TLS_ST_CW_FINISHED;
343 if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
344 st->hand_state = TLS_ST_CW_NEXT_PROTO;
346 st->hand_state = TLS_ST_CW_FINISHED;
348 return WRITE_TRAN_CONTINUE;
350 #if !defined(OPENSSL_NO_NEXTPROTONEG)
351 case TLS_ST_CW_NEXT_PROTO:
352 st->hand_state = TLS_ST_CW_FINISHED;
353 return WRITE_TRAN_CONTINUE;
356 case TLS_ST_CW_FINISHED:
358 st->hand_state = TLS_ST_OK;
359 ossl_statem_set_in_init(s, 0);
360 return WRITE_TRAN_CONTINUE;
362 return WRITE_TRAN_FINISHED;
365 case TLS_ST_CR_FINISHED:
367 st->hand_state = TLS_ST_CW_CHANGE;
368 return WRITE_TRAN_CONTINUE;
370 st->hand_state = TLS_ST_OK;
371 ossl_statem_set_in_init(s, 0);
372 return WRITE_TRAN_CONTINUE;
378 * Perform any pre work that needs to be done prior to sending a message from
379 * the client to the server.
381 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst)
383 OSSL_STATEM *st = &s->statem;
385 switch (st->hand_state) {
387 /* No pre work to be done */
390 case TLS_ST_CW_CLNT_HELLO:
392 if (SSL_IS_DTLS(s)) {
393 /* every DTLS ClientHello resets Finished MAC */
394 if (!ssl3_init_finished_mac(s)) {
395 ossl_statem_set_error(s);
401 case TLS_ST_CW_CHANGE:
402 if (SSL_IS_DTLS(s)) {
405 * We're into the last flight so we don't retransmit these
406 * messages unless we need to.
410 #ifndef OPENSSL_NO_SCTP
411 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
412 return dtls_wait_for_dry(s);
418 return tls_finish_handshake(s, wst);
421 return WORK_FINISHED_CONTINUE;
425 * Perform any work that needs to be done after sending a message from the
426 * client to the server.
428 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst)
430 OSSL_STATEM *st = &s->statem;
434 switch (st->hand_state) {
436 /* No post work to be done */
439 case TLS_ST_CW_CLNT_HELLO:
440 if (wst == WORK_MORE_A && statem_flush(s) != 1)
443 if (SSL_IS_DTLS(s)) {
444 /* Treat the next message as the first packet */
449 case TLS_ST_CW_KEY_EXCH:
450 if (tls_client_key_exchange_post_work(s) == 0)
454 case TLS_ST_CW_CHANGE:
455 s->session->cipher = s->s3->tmp.new_cipher;
456 #ifdef OPENSSL_NO_COMP
457 s->session->compress_meth = 0;
459 if (s->s3->tmp.new_compression == NULL)
460 s->session->compress_meth = 0;
462 s->session->compress_meth = s->s3->tmp.new_compression->id;
464 if (!s->method->ssl3_enc->setup_key_block(s))
467 if (!s->method->ssl3_enc->change_cipher_state(s,
468 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
471 if (SSL_IS_DTLS(s)) {
472 #ifndef OPENSSL_NO_SCTP
475 * Change to new shared key of SCTP-Auth, will be ignored if
478 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
483 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
487 case TLS_ST_CW_FINISHED:
488 #ifndef OPENSSL_NO_SCTP
489 if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
491 * Change to new shared key of SCTP-Auth, will be ignored if
494 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
498 if (statem_flush(s) != 1)
503 return WORK_FINISHED_CONTINUE;
507 * Get the message construction function and message type for sending from the
510 * Valid return values are:
514 int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
515 int (**confunc) (SSL *s, WPACKET *pkt),
518 OSSL_STATEM *st = &s->statem;
520 switch (st->hand_state) {
522 /* Shouldn't happen */
525 case TLS_ST_CW_CHANGE:
527 *confunc = dtls_construct_change_cipher_spec;
529 *confunc = tls_construct_change_cipher_spec;
530 *mt = SSL3_MT_CHANGE_CIPHER_SPEC;
533 case TLS_ST_CW_CLNT_HELLO:
534 *confunc = tls_construct_client_hello;
535 *mt = SSL3_MT_CLIENT_HELLO;
539 *confunc = tls_construct_client_certificate;
540 *mt = SSL3_MT_CERTIFICATE;
543 case TLS_ST_CW_KEY_EXCH:
544 *confunc = tls_construct_client_key_exchange;
545 *mt = SSL3_MT_CLIENT_KEY_EXCHANGE;
548 case TLS_ST_CW_CERT_VRFY:
549 *confunc = tls_construct_client_verify;
550 *mt = SSL3_MT_CERTIFICATE_VERIFY;
553 #if !defined(OPENSSL_NO_NEXTPROTONEG)
554 case TLS_ST_CW_NEXT_PROTO:
555 *confunc = tls_construct_next_proto;
556 *mt = SSL3_MT_NEXT_PROTO;
559 case TLS_ST_CW_FINISHED:
560 *confunc = tls_construct_finished;
561 *mt = SSL3_MT_FINISHED;
569 * Returns the maximum allowed length for the current message that we are
570 * reading. Excludes the message header.
572 unsigned long ossl_statem_client_max_message_size(SSL *s)
574 OSSL_STATEM *st = &s->statem;
576 switch (st->hand_state) {
578 /* Shouldn't happen */
581 case TLS_ST_CR_SRVR_HELLO:
582 return SERVER_HELLO_MAX_LENGTH;
584 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
585 return HELLO_VERIFY_REQUEST_MAX_LENGTH;
588 return s->max_cert_list;
590 case TLS_ST_CR_CERT_STATUS:
591 return SSL3_RT_MAX_PLAIN_LENGTH;
593 case TLS_ST_CR_KEY_EXCH:
594 return SERVER_KEY_EXCH_MAX_LENGTH;
596 case TLS_ST_CR_CERT_REQ:
598 * Set to s->max_cert_list for compatibility with previous releases. In
599 * practice these messages can get quite long if servers are configured
600 * to provide a long list of acceptable CAs
602 return s->max_cert_list;
604 case TLS_ST_CR_SRVR_DONE:
605 return SERVER_HELLO_DONE_MAX_LENGTH;
607 case TLS_ST_CR_CHANGE:
608 if (s->version == DTLS1_BAD_VER)
610 return CCS_MAX_LENGTH;
612 case TLS_ST_CR_SESSION_TICKET:
613 return SSL3_RT_MAX_PLAIN_LENGTH;
615 case TLS_ST_CR_FINISHED:
616 return FINISHED_MAX_LENGTH;
621 * Process a message that the client has been received from the server.
623 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
625 OSSL_STATEM *st = &s->statem;
627 switch (st->hand_state) {
629 /* Shouldn't happen */
630 return MSG_PROCESS_ERROR;
632 case TLS_ST_CR_SRVR_HELLO:
633 return tls_process_server_hello(s, pkt);
635 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
636 return dtls_process_hello_verify(s, pkt);
639 return tls_process_server_certificate(s, pkt);
641 case TLS_ST_CR_CERT_STATUS:
642 return tls_process_cert_status(s, pkt);
644 case TLS_ST_CR_KEY_EXCH:
645 return tls_process_key_exchange(s, pkt);
647 case TLS_ST_CR_CERT_REQ:
648 return tls_process_certificate_request(s, pkt);
650 case TLS_ST_CR_SRVR_DONE:
651 return tls_process_server_done(s, pkt);
653 case TLS_ST_CR_CHANGE:
654 return tls_process_change_cipher_spec(s, pkt);
656 case TLS_ST_CR_SESSION_TICKET:
657 return tls_process_new_session_ticket(s, pkt);
659 case TLS_ST_CR_FINISHED:
660 return tls_process_finished(s, pkt);
665 * Perform any further processing required following the receipt of a message
668 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
670 OSSL_STATEM *st = &s->statem;
672 switch (st->hand_state) {
674 /* Shouldn't happen */
677 case TLS_ST_CR_CERT_REQ:
678 return tls_prepare_client_certificate(s, wst);
680 #ifndef OPENSSL_NO_SCTP
681 case TLS_ST_CR_SRVR_DONE:
682 /* We only get here if we are using SCTP and we are renegotiating */
683 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
684 s->s3->in_read_app_data = 2;
685 s->rwstate = SSL_READING;
686 BIO_clear_retry_flags(SSL_get_rbio(s));
687 BIO_set_retry_read(SSL_get_rbio(s));
688 ossl_statem_set_sctp_read_sock(s, 1);
691 ossl_statem_set_sctp_read_sock(s, 0);
692 return WORK_FINISHED_STOP;
697 int tls_construct_client_hello(SSL *s, WPACKET *pkt)
702 int al = SSL_AD_HANDSHAKE_FAILURE;
703 #ifndef OPENSSL_NO_COMP
706 SSL_SESSION *sess = s->session;
708 if (!WPACKET_set_max_size(pkt, SSL3_RT_MAX_PLAIN_LENGTH)) {
709 /* Should not happen */
710 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
714 /* Work out what SSL/TLS/DTLS version to use */
715 protverr = ssl_set_client_hello_version(s);
717 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
721 if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) ||
723 * In the case of EAP-FAST, we can have a pre-shared
724 * "ticket" without a session ID.
726 (!sess->session_id_length && !sess->tlsext_tick) ||
727 (sess->not_resumable)) {
728 if (!ssl_get_new_session(s, 0))
731 /* else use the pre-loaded session */
733 p = s->s3->client_random;
736 * for DTLS if client_random is initialized, reuse it, we are
737 * required to use same upon reply to HelloVerify
739 if (SSL_IS_DTLS(s)) {
742 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
751 if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0)
755 * version indicates the negotiated version: for example from
756 * an SSLv2/v3 compatible client hello). The client_version
757 * field is the maximum version we permit and it is also
758 * used in RSA encrypted premaster secrets. Some servers can
759 * choke if we initially report a higher version then
760 * renegotiate to a lower one in the premaster secret. This
761 * didn't happen with TLS 1.0 as most servers supported it
762 * but it can with TLS 1.1 or later if the server only supports
765 * Possible scenario with previous logic:
766 * 1. Client hello indicates TLS 1.2
767 * 2. Server hello says TLS 1.0
768 * 3. RSA encrypted premaster secret uses 1.2.
769 * 4. Handshake proceeds using TLS 1.0.
770 * 5. Server sends hello request to renegotiate.
771 * 6. Client hello indicates TLS v1.0 as we now
772 * know that is maximum server supports.
773 * 7. Server chokes on RSA encrypted premaster secret
774 * containing version 1.0.
776 * For interoperability it should be OK to always use the
777 * maximum version we support in client hello and then rely
778 * on the checking of version to ensure the servers isn't
779 * being inconsistent: for example initially negotiating with
780 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
781 * client_version in client hello and not resetting it to
782 * the negotiated version.
784 if (!WPACKET_put_bytes_u16(pkt, s->client_version)
785 || !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) {
786 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
794 i = s->session->session_id_length;
795 if (i > (int)sizeof(s->session->session_id)
796 || !WPACKET_start_sub_packet_u8(pkt)
797 || (i != 0 && !WPACKET_memcpy(pkt, s->session->session_id, i))
798 || !WPACKET_close(pkt)) {
799 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
803 /* cookie stuff for DTLS */
804 if (SSL_IS_DTLS(s)) {
805 if (s->d1->cookie_len > sizeof(s->d1->cookie)
806 || !WPACKET_sub_memcpy_u8(pkt, s->d1->cookie,
807 s->d1->cookie_len)) {
808 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
813 /* Ciphers supported */
814 if (!WPACKET_start_sub_packet_u16(pkt)) {
815 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
818 /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */
819 if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), pkt))
821 if (!WPACKET_close(pkt)) {
822 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
827 if (!WPACKET_start_sub_packet_u8(pkt)) {
828 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
831 #ifndef OPENSSL_NO_COMP
832 if (ssl_allow_compression(s) && s->ctx->comp_methods) {
833 int compnum = sk_SSL_COMP_num(s->ctx->comp_methods);
834 for (i = 0; i < compnum; i++) {
835 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
836 if (!WPACKET_put_bytes_u8(pkt, comp->id)) {
837 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
843 /* Add the NULL method */
844 if (!WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) {
845 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
850 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
851 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
854 if (!WPACKET_start_sub_packet_u16(pkt)
856 * If extensions are of zero length then we don't even add the
857 * extensions length bytes
859 || !WPACKET_set_flags(pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH)
860 || !ssl_add_clienthello_tlsext(s, pkt, &al)
861 || !WPACKET_close(pkt)) {
862 ssl3_send_alert(s, SSL3_AL_FATAL, al);
863 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
870 MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
873 unsigned int cookie_len;
876 if (!PACKET_forward(pkt, 2)
877 || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
878 al = SSL_AD_DECODE_ERROR;
879 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
883 cookie_len = PACKET_remaining(&cookiepkt);
884 if (cookie_len > sizeof(s->d1->cookie)) {
885 al = SSL_AD_ILLEGAL_PARAMETER;
886 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
890 if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
891 al = SSL_AD_DECODE_ERROR;
892 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
895 s->d1->cookie_len = cookie_len;
897 return MSG_PROCESS_FINISHED_READING;
899 ssl3_send_alert(s, SSL3_AL_FATAL, al);
900 ossl_statem_set_error(s);
901 return MSG_PROCESS_ERROR;
904 MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
906 STACK_OF(SSL_CIPHER) *sk;
909 size_t session_id_len;
910 const unsigned char *cipherchars;
911 int i, al = SSL_AD_INTERNAL_ERROR;
912 unsigned int compression;
913 unsigned int sversion;
915 #ifndef OPENSSL_NO_COMP
919 if (!PACKET_get_net_2(pkt, &sversion)) {
920 al = SSL_AD_DECODE_ERROR;
921 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
925 protverr = ssl_choose_client_version(s, sversion);
927 al = SSL_AD_PROTOCOL_VERSION;
928 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
932 /* load the server hello data */
933 /* load the server random */
934 if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
935 al = SSL_AD_DECODE_ERROR;
936 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
942 /* Get the session-id. */
943 if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
944 al = SSL_AD_DECODE_ERROR;
945 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
948 session_id_len = PACKET_remaining(&session_id);
949 if (session_id_len > sizeof s->session->session_id
950 || session_id_len > SSL3_SESSION_ID_SIZE) {
951 al = SSL_AD_ILLEGAL_PARAMETER;
952 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
956 if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
957 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
958 al = SSL_AD_DECODE_ERROR;
963 * Check if we can resume the session based on external pre-shared secret.
964 * EAP-FAST (RFC 4851) supports two types of session resumption.
965 * Resumption based on server-side state works with session IDs.
966 * Resumption based on pre-shared Protected Access Credentials (PACs)
967 * works by overriding the SessionTicket extension at the application
968 * layer, and does not send a session ID. (We do not know whether EAP-FAST
969 * servers would honour the session ID.) Therefore, the session ID alone
970 * is not a reliable indicator of session resumption, so we first check if
971 * we can resume, and later peek at the next handshake message to see if the
972 * server wants to resume.
974 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
975 s->session->tlsext_tick) {
976 const SSL_CIPHER *pref_cipher = NULL;
977 s->session->master_key_length = sizeof(s->session->master_key);
978 if (s->tls_session_secret_cb(s, s->session->master_key,
979 &s->session->master_key_length,
981 s->tls_session_secret_cb_arg)) {
982 s->session->cipher = pref_cipher ?
983 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
985 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
986 al = SSL_AD_INTERNAL_ERROR;
991 if (session_id_len != 0 && session_id_len == s->session->session_id_length
992 && memcmp(PACKET_data(&session_id), s->session->session_id,
993 session_id_len) == 0) {
994 if (s->sid_ctx_length != s->session->sid_ctx_length
995 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
996 /* actually a client application bug */
997 al = SSL_AD_ILLEGAL_PARAMETER;
998 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
999 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1005 * If we were trying for session-id reuse but the server
1006 * didn't echo the ID, make a new SSL_SESSION.
1007 * In the case of EAP-FAST and PAC, we do not send a session ID,
1008 * so the PAC-based session secret is always preserved. It'll be
1009 * overwritten if the server refuses resumption.
1011 if (s->session->session_id_length > 0) {
1012 s->ctx->stats.sess_miss++;
1013 if (!ssl_get_new_session(s, 0)) {
1018 s->session->ssl_version = s->version;
1019 s->session->session_id_length = session_id_len;
1020 /* session_id_len could be 0 */
1021 memcpy(s->session->session_id, PACKET_data(&session_id),
1025 /* Session version and negotiated protocol version should match */
1026 if (s->version != s->session->ssl_version) {
1027 al = SSL_AD_PROTOCOL_VERSION;
1029 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1030 SSL_R_SSL_SESSION_VERSION_MISMATCH);
1034 c = ssl_get_cipher_by_char(s, cipherchars);
1036 /* unknown cipher */
1037 al = SSL_AD_ILLEGAL_PARAMETER;
1038 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1042 * Now that we know the version, update the check to see if it's an allowed
1045 s->s3->tmp.min_ver = s->version;
1046 s->s3->tmp.max_ver = s->version;
1048 * If it is a disabled cipher we either didn't send it in client hello,
1049 * or it's not allowed for the selected protocol. So we return an error.
1051 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1052 al = SSL_AD_ILLEGAL_PARAMETER;
1053 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1057 sk = ssl_get_ciphers_by_id(s);
1058 i = sk_SSL_CIPHER_find(sk, c);
1060 /* we did not say we would use this cipher */
1061 al = SSL_AD_ILLEGAL_PARAMETER;
1062 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1067 * Depending on the session caching (internal/external), the cipher
1068 * and/or cipher_id values may not be set. Make sure that cipher_id is
1069 * set and use it for comparison.
1071 if (s->session->cipher)
1072 s->session->cipher_id = s->session->cipher->id;
1073 if (s->hit && (s->session->cipher_id != c->id)) {
1074 al = SSL_AD_ILLEGAL_PARAMETER;
1075 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1076 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1079 s->s3->tmp.new_cipher = c;
1080 /* lets get the compression algorithm */
1082 if (!PACKET_get_1(pkt, &compression)) {
1083 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1084 al = SSL_AD_DECODE_ERROR;
1087 #ifdef OPENSSL_NO_COMP
1088 if (compression != 0) {
1089 al = SSL_AD_ILLEGAL_PARAMETER;
1090 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1091 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1095 * If compression is disabled we'd better not try to resume a session
1096 * using compression.
1098 if (s->session->compress_meth != 0) {
1099 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1103 if (s->hit && compression != s->session->compress_meth) {
1104 al = SSL_AD_ILLEGAL_PARAMETER;
1105 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1106 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1109 if (compression == 0)
1111 else if (!ssl_allow_compression(s)) {
1112 al = SSL_AD_ILLEGAL_PARAMETER;
1113 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1116 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1119 if (compression != 0 && comp == NULL) {
1120 al = SSL_AD_ILLEGAL_PARAMETER;
1121 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1122 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1125 s->s3->tmp.new_compression = comp;
1129 /* TLS extensions */
1130 if (!ssl_parse_serverhello_tlsext(s, pkt)) {
1131 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1135 if (PACKET_remaining(pkt) != 0) {
1136 /* wrong packet length */
1137 al = SSL_AD_DECODE_ERROR;
1138 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1141 #ifndef OPENSSL_NO_SCTP
1142 if (SSL_IS_DTLS(s) && s->hit) {
1143 unsigned char sctpauthkey[64];
1144 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
1147 * Add new shared key for SCTP-Auth, will be ignored if
1150 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
1151 sizeof(DTLS1_SCTP_AUTH_LABEL));
1153 if (SSL_export_keying_material(s, sctpauthkey,
1154 sizeof(sctpauthkey),
1156 sizeof(labelbuffer), NULL, 0, 0) <= 0)
1159 BIO_ctrl(SSL_get_wbio(s),
1160 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
1161 sizeof(sctpauthkey), sctpauthkey);
1165 return MSG_PROCESS_CONTINUE_READING;
1167 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1169 ossl_statem_set_error(s);
1170 return MSG_PROCESS_ERROR;
1173 MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
1175 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
1176 unsigned long cert_list_len, cert_len;
1178 const unsigned char *certstart, *certbytes;
1179 STACK_OF(X509) *sk = NULL;
1180 EVP_PKEY *pkey = NULL;
1182 if ((sk = sk_X509_new_null()) == NULL) {
1183 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1187 if (!PACKET_get_net_3(pkt, &cert_list_len)
1188 || PACKET_remaining(pkt) != cert_list_len) {
1189 al = SSL_AD_DECODE_ERROR;
1190 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1193 while (PACKET_remaining(pkt)) {
1194 if (!PACKET_get_net_3(pkt, &cert_len)
1195 || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
1196 al = SSL_AD_DECODE_ERROR;
1197 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1198 SSL_R_CERT_LENGTH_MISMATCH);
1202 certstart = certbytes;
1203 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1205 al = SSL_AD_BAD_CERTIFICATE;
1206 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1209 if (certbytes != (certstart + cert_len)) {
1210 al = SSL_AD_DECODE_ERROR;
1211 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1212 SSL_R_CERT_LENGTH_MISMATCH);
1215 if (!sk_X509_push(sk, x)) {
1216 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1222 i = ssl_verify_cert_chain(s, sk);
1223 if ((s->verify_mode & SSL_VERIFY_PEER) && i <= 0) {
1224 al = ssl_verify_alarm_type(s->verify_result);
1225 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1226 SSL_R_CERTIFICATE_VERIFY_FAILED);
1229 ERR_clear_error(); /* but we keep s->verify_result */
1231 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
1232 al = SSL_AD_HANDSHAKE_FAILURE;
1236 s->session->peer_chain = sk;
1238 * Inconsistency alert: cert_chain does include the peer's certificate,
1239 * which we don't include in statem_srvr.c
1241 x = sk_X509_value(sk, 0);
1244 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1247 pkey = X509_get0_pubkey(x);
1249 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1252 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1253 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1257 i = ssl_cert_type(x, pkey);
1261 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1262 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1266 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1267 if (exp_idx >= 0 && i != exp_idx
1268 && (exp_idx != SSL_PKEY_GOST_EC ||
1269 (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
1270 && i != SSL_PKEY_GOST01))) {
1272 al = SSL_AD_ILLEGAL_PARAMETER;
1273 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1274 SSL_R_WRONG_CERTIFICATE_TYPE);
1277 s->session->peer_type = i;
1279 X509_free(s->session->peer);
1281 s->session->peer = x;
1282 s->session->verify_result = s->verify_result;
1285 ret = MSG_PROCESS_CONTINUE_READING;
1289 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1291 ossl_statem_set_error(s);
1294 sk_X509_pop_free(sk, X509_free);
1298 static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al)
1300 #ifndef OPENSSL_NO_PSK
1301 PACKET psk_identity_hint;
1303 /* PSK ciphersuites are preceded by an identity hint */
1305 if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
1306 *al = SSL_AD_DECODE_ERROR;
1307 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH);
1312 * Store PSK identity hint for later use, hint is used in
1313 * tls_construct_client_key_exchange. Assume that the maximum length of
1314 * a PSK identity hint can be as long as the maximum length of a PSK
1317 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1318 *al = SSL_AD_HANDSHAKE_FAILURE;
1319 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG);
1323 if (PACKET_remaining(&psk_identity_hint) == 0) {
1324 OPENSSL_free(s->session->psk_identity_hint);
1325 s->session->psk_identity_hint = NULL;
1326 } else if (!PACKET_strndup(&psk_identity_hint,
1327 &s->session->psk_identity_hint)) {
1328 *al = SSL_AD_INTERNAL_ERROR;
1334 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
1335 *al = SSL_AD_INTERNAL_ERROR;
1340 static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1342 #ifndef OPENSSL_NO_SRP
1343 PACKET prime, generator, salt, server_pub;
1345 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1346 || !PACKET_get_length_prefixed_2(pkt, &generator)
1347 || !PACKET_get_length_prefixed_1(pkt, &salt)
1348 || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
1349 *al = SSL_AD_DECODE_ERROR;
1350 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH);
1355 BN_bin2bn(PACKET_data(&prime),
1356 PACKET_remaining(&prime), NULL)) == NULL
1358 BN_bin2bn(PACKET_data(&generator),
1359 PACKET_remaining(&generator), NULL)) == NULL
1361 BN_bin2bn(PACKET_data(&salt),
1362 PACKET_remaining(&salt), NULL)) == NULL
1364 BN_bin2bn(PACKET_data(&server_pub),
1365 PACKET_remaining(&server_pub), NULL)) == NULL) {
1366 *al = SSL_AD_INTERNAL_ERROR;
1367 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
1371 if (!srp_verify_server_param(s, al)) {
1372 *al = SSL_AD_DECODE_ERROR;
1373 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
1377 /* We must check if there is a certificate */
1378 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1379 *pkey = X509_get0_pubkey(s->session->peer);
1383 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
1384 *al = SSL_AD_INTERNAL_ERROR;
1389 static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1391 #ifndef OPENSSL_NO_DH
1392 PACKET prime, generator, pub_key;
1393 EVP_PKEY *peer_tmp = NULL;
1396 BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
1398 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1399 || !PACKET_get_length_prefixed_2(pkt, &generator)
1400 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1401 *al = SSL_AD_DECODE_ERROR;
1402 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
1406 peer_tmp = EVP_PKEY_new();
1409 if (peer_tmp == NULL || dh == NULL) {
1410 *al = SSL_AD_INTERNAL_ERROR;
1411 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
1415 p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
1416 g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), NULL);
1417 bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
1419 if (p == NULL || g == NULL || bnpub_key == NULL) {
1420 *al = SSL_AD_INTERNAL_ERROR;
1421 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1425 if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) {
1426 *al = SSL_AD_DECODE_ERROR;
1427 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
1431 if (!DH_set0_pqg(dh, p, NULL, g)) {
1432 *al = SSL_AD_INTERNAL_ERROR;
1433 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1438 if (!DH_set0_key(dh, bnpub_key, NULL)) {
1439 *al = SSL_AD_INTERNAL_ERROR;
1440 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1445 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1446 *al = SSL_AD_HANDSHAKE_FAILURE;
1447 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
1451 if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
1452 *al = SSL_AD_INTERNAL_ERROR;
1453 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
1457 s->s3->peer_tmp = peer_tmp;
1460 * FIXME: This makes assumptions about which ciphersuites come with
1461 * public keys. We should have a less ad-hoc way of doing this
1463 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1464 *pkey = X509_get0_pubkey(s->session->peer);
1465 /* else anonymous DH, so no certificate or pkey. */
1474 EVP_PKEY_free(peer_tmp);
1478 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
1479 *al = SSL_AD_INTERNAL_ERROR;
1484 static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1486 #ifndef OPENSSL_NO_EC
1488 const unsigned char *ecparams;
1490 unsigned int curve_flags;
1491 EVP_PKEY_CTX *pctx = NULL;
1494 * Extract elliptic curve parameters and the server's ephemeral ECDH
1495 * public key. For now we only support named (not generic) curves and
1496 * ECParameters in this case is just three bytes.
1498 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1499 *al = SSL_AD_DECODE_ERROR;
1500 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
1504 * Check curve is one of our preferences, if not server has sent an
1505 * invalid curve. ECParameters is 3 bytes.
1507 if (!tls1_check_curve(s, ecparams, 3)) {
1508 *al = SSL_AD_DECODE_ERROR;
1509 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
1513 curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
1515 if (curve_nid == 0) {
1516 *al = SSL_AD_INTERNAL_ERROR;
1517 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
1518 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1522 if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
1523 EVP_PKEY *key = EVP_PKEY_new();
1525 if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
1526 *al = SSL_AD_INTERNAL_ERROR;
1527 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1531 s->s3->peer_tmp = key;
1533 /* Set up EVP_PKEY with named curve as parameters */
1534 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
1536 || EVP_PKEY_paramgen_init(pctx) <= 0
1537 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
1538 || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
1539 *al = SSL_AD_INTERNAL_ERROR;
1540 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1541 EVP_PKEY_CTX_free(pctx);
1544 EVP_PKEY_CTX_free(pctx);
1548 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1549 *al = SSL_AD_DECODE_ERROR;
1550 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
1554 if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
1555 PACKET_data(&encoded_pt),
1556 PACKET_remaining(&encoded_pt))) {
1557 *al = SSL_AD_DECODE_ERROR;
1558 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
1563 * The ECC/TLS specification does not mention the use of DSA to sign
1564 * ECParameters in the server key exchange message. We do support RSA
1567 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
1568 *pkey = X509_get0_pubkey(s->session->peer);
1569 else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
1570 *pkey = X509_get0_pubkey(s->session->peer);
1571 /* else anonymous ECDH, so no certificate or pkey. */
1575 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
1576 *al = SSL_AD_INTERNAL_ERROR;
1581 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1585 EVP_PKEY *pkey = NULL;
1586 PACKET save_param_start, signature;
1588 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1590 save_param_start = *pkt;
1592 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1593 EVP_PKEY_free(s->s3->peer_tmp);
1594 s->s3->peer_tmp = NULL;
1597 if (alg_k & SSL_PSK) {
1598 if (!tls_process_ske_psk_preamble(s, pkt, &al))
1602 /* Nothing else to do for plain PSK or RSAPSK */
1603 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1604 } else if (alg_k & SSL_kSRP) {
1605 if (!tls_process_ske_srp(s, pkt, &pkey, &al))
1607 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1608 if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
1610 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1611 if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
1614 al = SSL_AD_UNEXPECTED_MESSAGE;
1615 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1619 /* if it was signed, check the signature */
1623 const EVP_MD *md = NULL;
1627 * |pkt| now points to the beginning of the signature, so the difference
1628 * equals the length of the parameters.
1630 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1631 PACKET_remaining(&save_param_start) -
1632 PACKET_remaining(pkt))) {
1633 al = SSL_AD_INTERNAL_ERROR;
1634 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1638 if (SSL_USE_SIGALGS(s)) {
1639 const unsigned char *sigalgs;
1641 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1642 al = SSL_AD_DECODE_ERROR;
1643 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1646 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1648 al = SSL_AD_INTERNAL_ERROR;
1650 } else if (rv == 0) {
1651 al = SSL_AD_DECODE_ERROR;
1655 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1657 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
1658 md = EVP_md5_sha1();
1663 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1664 || PACKET_remaining(pkt) != 0) {
1665 al = SSL_AD_DECODE_ERROR;
1666 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1669 maxsig = EVP_PKEY_size(pkey);
1671 al = SSL_AD_INTERNAL_ERROR;
1672 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1677 * Check signature length
1679 if (PACKET_remaining(&signature) > (size_t)maxsig) {
1680 /* wrong packet length */
1681 al = SSL_AD_DECODE_ERROR;
1682 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1683 SSL_R_WRONG_SIGNATURE_LENGTH);
1687 md_ctx = EVP_MD_CTX_new();
1688 if (md_ctx == NULL) {
1689 al = SSL_AD_INTERNAL_ERROR;
1690 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1694 if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
1695 || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
1696 SSL3_RANDOM_SIZE) <= 0
1697 || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
1698 SSL3_RANDOM_SIZE) <= 0
1699 || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
1700 PACKET_remaining(¶ms)) <= 0) {
1701 EVP_MD_CTX_free(md_ctx);
1702 al = SSL_AD_INTERNAL_ERROR;
1703 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1706 if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
1707 PACKET_remaining(&signature), pkey) <= 0) {
1709 EVP_MD_CTX_free(md_ctx);
1710 al = SSL_AD_DECRYPT_ERROR;
1711 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1714 EVP_MD_CTX_free(md_ctx);
1716 /* aNULL, aSRP or PSK do not need public keys */
1717 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
1718 && !(alg_k & SSL_PSK)) {
1719 /* Might be wrong key type, check it */
1720 if (ssl3_check_cert_and_algorithm(s)) {
1721 /* Otherwise this shouldn't happen */
1722 al = SSL_AD_INTERNAL_ERROR;
1723 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1725 al = SSL_AD_DECODE_ERROR;
1729 /* still data left over */
1730 if (PACKET_remaining(pkt) != 0) {
1731 al = SSL_AD_DECODE_ERROR;
1732 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1737 return MSG_PROCESS_CONTINUE_READING;
1740 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1741 ossl_statem_set_error(s);
1742 return MSG_PROCESS_ERROR;
1745 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
1747 int ret = MSG_PROCESS_ERROR;
1748 unsigned int list_len, ctype_num, i, name_len;
1749 X509_NAME *xn = NULL;
1750 const unsigned char *data;
1751 const unsigned char *namestart, *namebytes;
1752 STACK_OF(X509_NAME) *ca_sk = NULL;
1754 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1755 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1759 /* get the certificate types */
1760 if (!PACKET_get_1(pkt, &ctype_num)
1761 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
1762 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1763 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1766 OPENSSL_free(s->cert->ctypes);
1767 s->cert->ctypes = NULL;
1768 if (ctype_num > SSL3_CT_NUMBER) {
1769 /* If we exceed static buffer copy all to cert structure */
1770 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1771 if (s->cert->ctypes == NULL) {
1772 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1775 memcpy(s->cert->ctypes, data, ctype_num);
1776 s->cert->ctype_num = (size_t)ctype_num;
1777 ctype_num = SSL3_CT_NUMBER;
1779 for (i = 0; i < ctype_num; i++)
1780 s->s3->tmp.ctype[i] = data[i];
1782 if (SSL_USE_SIGALGS(s)) {
1783 if (!PACKET_get_net_2(pkt, &list_len)
1784 || !PACKET_get_bytes(pkt, &data, list_len)) {
1785 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1786 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1787 SSL_R_LENGTH_MISMATCH);
1791 /* Clear certificate digests and validity flags */
1792 for (i = 0; i < SSL_PKEY_NUM; i++) {
1793 s->s3->tmp.md[i] = NULL;
1794 s->s3->tmp.valid_flags[i] = 0;
1796 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1797 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1798 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1799 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1802 if (!tls1_process_sigalgs(s)) {
1803 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1804 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1808 ssl_set_default_md(s);
1811 /* get the CA RDNs */
1812 if (!PACKET_get_net_2(pkt, &list_len)
1813 || PACKET_remaining(pkt) != list_len) {
1814 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1815 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1819 while (PACKET_remaining(pkt)) {
1820 if (!PACKET_get_net_2(pkt, &name_len)
1821 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
1822 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1823 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1824 SSL_R_LENGTH_MISMATCH);
1828 namestart = namebytes;
1830 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
1831 name_len)) == NULL) {
1832 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1833 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1837 if (namebytes != (namestart + name_len)) {
1838 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1839 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1840 SSL_R_CA_DN_LENGTH_MISMATCH);
1843 if (!sk_X509_NAME_push(ca_sk, xn)) {
1844 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1850 /* we should setup a certificate to return.... */
1851 s->s3->tmp.cert_req = 1;
1852 s->s3->tmp.ctype_num = ctype_num;
1853 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1854 s->s3->tmp.ca_names = ca_sk;
1857 ret = MSG_PROCESS_CONTINUE_PROCESSING;
1860 ossl_statem_set_error(s);
1863 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1867 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
1869 return (X509_NAME_cmp(*a, *b));
1872 MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
1875 unsigned int ticklen;
1876 unsigned long ticket_lifetime_hint;
1878 if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
1879 || !PACKET_get_net_2(pkt, &ticklen)
1880 || PACKET_remaining(pkt) != ticklen) {
1881 al = SSL_AD_DECODE_ERROR;
1882 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1886 /* Server is allowed to change its mind and send an empty ticket. */
1888 return MSG_PROCESS_CONTINUE_READING;
1890 if (s->session->session_id_length > 0) {
1891 int i = s->session_ctx->session_cache_mode;
1892 SSL_SESSION *new_sess;
1894 * We reused an existing session, so we need to replace it with a new
1897 if (i & SSL_SESS_CACHE_CLIENT) {
1899 * Remove the old session from the cache. We carry on if this fails
1901 SSL_CTX_remove_session(s->session_ctx, s->session);
1904 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1905 al = SSL_AD_INTERNAL_ERROR;
1906 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1910 SSL_SESSION_free(s->session);
1911 s->session = new_sess;
1914 OPENSSL_free(s->session->tlsext_tick);
1915 s->session->tlsext_ticklen = 0;
1917 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1918 if (s->session->tlsext_tick == NULL) {
1919 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1922 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
1923 al = SSL_AD_DECODE_ERROR;
1924 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1928 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
1929 s->session->tlsext_ticklen = ticklen;
1931 * There are two ways to detect a resumed ticket session. One is to set
1932 * an appropriate session ID and then the server must return a match in
1933 * ServerHello. This allows the normal client session ID matching to work
1934 * and we know much earlier that the ticket has been accepted. The
1935 * other way is to set zero length session ID when the ticket is
1936 * presented and rely on the handshake to determine session resumption.
1937 * We choose the former approach because this fits in with assumptions
1938 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1939 * SHA256 is disabled) hash of the ticket.
1941 if (!EVP_Digest(s->session->tlsext_tick, ticklen,
1942 s->session->session_id, &s->session->session_id_length,
1943 EVP_sha256(), NULL)) {
1944 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
1947 return MSG_PROCESS_CONTINUE_READING;
1949 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1951 ossl_statem_set_error(s);
1952 return MSG_PROCESS_ERROR;
1955 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
1958 unsigned long resplen;
1961 if (!PACKET_get_1(pkt, &type)
1962 || type != TLSEXT_STATUSTYPE_ocsp) {
1963 al = SSL_AD_DECODE_ERROR;
1964 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1967 if (!PACKET_get_net_3(pkt, &resplen)
1968 || PACKET_remaining(pkt) != resplen) {
1969 al = SSL_AD_DECODE_ERROR;
1970 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1973 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
1974 if (s->tlsext_ocsp_resp == NULL) {
1975 al = SSL_AD_INTERNAL_ERROR;
1976 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1979 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
1980 al = SSL_AD_DECODE_ERROR;
1981 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1984 s->tlsext_ocsp_resplen = resplen;
1985 return MSG_PROCESS_CONTINUE_READING;
1987 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1988 ossl_statem_set_error(s);
1989 return MSG_PROCESS_ERROR;
1992 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
1994 if (PACKET_remaining(pkt) > 0) {
1995 /* should contain no data */
1996 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1997 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
1998 ossl_statem_set_error(s);
1999 return MSG_PROCESS_ERROR;
2001 #ifndef OPENSSL_NO_SRP
2002 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2003 if (SRP_Calc_A_param(s) <= 0) {
2004 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2005 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2006 ossl_statem_set_error(s);
2007 return MSG_PROCESS_ERROR;
2013 * at this point we check that we have the required stuff from
2016 if (!ssl3_check_cert_and_algorithm(s)) {
2017 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2018 ossl_statem_set_error(s);
2019 return MSG_PROCESS_ERROR;
2023 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2024 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2025 * message, or NULL and -1 otherwise
2027 if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
2029 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2031 ssl3_send_alert(s, SSL3_AL_FATAL,
2032 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
2033 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
2034 SSL_R_INVALID_STATUS_RESPONSE);
2035 return MSG_PROCESS_ERROR;
2038 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2039 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
2040 return MSG_PROCESS_ERROR;
2043 #ifndef OPENSSL_NO_CT
2044 if (s->ct_validation_callback != NULL) {
2045 /* Note we validate the SCTs whether or not we abort on error */
2046 if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
2047 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2048 return MSG_PROCESS_ERROR;
2053 #ifndef OPENSSL_NO_SCTP
2054 /* Only applies to renegotiation */
2055 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2056 && s->renegotiate != 0)
2057 return MSG_PROCESS_CONTINUE_PROCESSING;
2060 return MSG_PROCESS_FINISHED_READING;
2063 static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al)
2065 #ifndef OPENSSL_NO_PSK
2068 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2069 * \0-terminated identity. The last byte is for us for simulating
2072 char identity[PSK_MAX_IDENTITY_LEN + 1];
2073 size_t identitylen = 0;
2074 unsigned char psk[PSK_MAX_PSK_LEN];
2075 unsigned char *tmppsk = NULL;
2076 char *tmpidentity = NULL;
2079 if (s->psk_client_callback == NULL) {
2080 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
2081 *al = SSL_AD_INTERNAL_ERROR;
2085 memset(identity, 0, sizeof(identity));
2087 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2088 identity, sizeof(identity) - 1,
2091 if (psklen > PSK_MAX_PSK_LEN) {
2092 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2093 *al = SSL_AD_HANDSHAKE_FAILURE;
2095 } else if (psklen == 0) {
2096 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
2097 SSL_R_PSK_IDENTITY_NOT_FOUND);
2098 *al = SSL_AD_HANDSHAKE_FAILURE;
2102 identitylen = strlen(identity);
2103 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2104 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2105 *al = SSL_AD_HANDSHAKE_FAILURE;
2109 tmppsk = OPENSSL_memdup(psk, psklen);
2110 tmpidentity = OPENSSL_strdup(identity);
2111 if (tmppsk == NULL || tmpidentity == NULL) {
2112 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
2113 *al = SSL_AD_INTERNAL_ERROR;
2117 OPENSSL_free(s->s3->tmp.psk);
2118 s->s3->tmp.psk = tmppsk;
2119 s->s3->tmp.psklen = psklen;
2121 OPENSSL_free(s->session->psk_identity);
2122 s->session->psk_identity = tmpidentity;
2125 if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) {
2126 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2127 *al = SSL_AD_INTERNAL_ERROR;
2134 OPENSSL_cleanse(psk, psklen);
2135 OPENSSL_cleanse(identity, sizeof(identity));
2136 OPENSSL_clear_free(tmppsk, psklen);
2137 OPENSSL_clear_free(tmpidentity, identitylen);
2141 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2142 *al = SSL_AD_INTERNAL_ERROR;
2147 static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al)
2149 #ifndef OPENSSL_NO_RSA
2150 unsigned char *encdata = NULL;
2151 EVP_PKEY *pkey = NULL;
2152 EVP_PKEY_CTX *pctx = NULL;
2154 unsigned char *pms = NULL;
2157 if (s->session->peer == NULL) {
2159 * We should always have a server certificate with SSL_kRSA.
2161 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2165 pkey = X509_get0_pubkey(s->session->peer);
2166 if (EVP_PKEY_get0_RSA(pkey) == NULL) {
2167 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2171 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2172 pms = OPENSSL_malloc(pmslen);
2174 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
2175 *al = SSL_AD_INTERNAL_ERROR;
2179 pms[0] = s->client_version >> 8;
2180 pms[1] = s->client_version & 0xff;
2181 if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
2185 /* Fix buf for TLS and beyond */
2186 if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) {
2187 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2190 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2191 if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
2192 || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
2193 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
2196 if (!WPACKET_allocate_bytes(pkt, enclen, &encdata)
2197 || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) {
2198 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
2201 EVP_PKEY_CTX_free(pctx);
2204 if (s->options & SSL_OP_PKCS1_CHECK_1)
2206 if (s->options & SSL_OP_PKCS1_CHECK_2)
2210 /* Fix buf for TLS and beyond */
2211 if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) {
2212 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2216 s->s3->tmp.pms = pms;
2217 s->s3->tmp.pmslen = pmslen;
2221 OPENSSL_clear_free(pms, pmslen);
2222 EVP_PKEY_CTX_free(pctx);
2226 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2227 *al = SSL_AD_INTERNAL_ERROR;
2232 static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al)
2234 #ifndef OPENSSL_NO_DH
2236 const BIGNUM *pub_key;
2237 EVP_PKEY *ckey = NULL, *skey = NULL;
2238 unsigned char *keybytes = NULL;
2240 skey = s->s3->peer_tmp;
2244 ckey = ssl_generate_pkey(skey);
2245 dh_clnt = EVP_PKEY_get0_DH(ckey);
2247 if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0)
2250 /* send off the data */
2251 DH_get0_key(dh_clnt, &pub_key, NULL);
2252 if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes))
2255 BN_bn2bin(pub_key, keybytes);
2256 EVP_PKEY_free(ckey);
2260 EVP_PKEY_free(ckey);
2262 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2263 *al = SSL_AD_INTERNAL_ERROR;
2267 static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al)
2269 #ifndef OPENSSL_NO_EC
2270 unsigned char *encodedPoint = NULL;
2271 int encoded_pt_len = 0;
2272 EVP_PKEY *ckey = NULL, *skey = NULL;
2275 skey = s->s3->peer_tmp;
2277 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2281 ckey = ssl_generate_pkey(skey);
2283 if (ssl_derive(s, ckey, skey) == 0) {
2284 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
2288 /* Generate encoding of client key */
2289 encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
2291 if (encoded_pt_len == 0) {
2292 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
2296 if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) {
2297 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2303 OPENSSL_free(encodedPoint);
2304 EVP_PKEY_free(ckey);
2307 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2308 *al = SSL_AD_INTERNAL_ERROR;
2313 static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al)
2315 #ifndef OPENSSL_NO_GOST
2316 /* GOST key exchange message creation */
2317 EVP_PKEY_CTX *pkey_ctx = NULL;
2320 unsigned int md_len;
2321 unsigned char shared_ukm[32], tmp[256];
2322 EVP_MD_CTX *ukm_hash = NULL;
2323 int dgst_nid = NID_id_GostR3411_94;
2324 unsigned char *pms = NULL;
2327 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2328 dgst_nid = NID_id_GostR3411_2012_256;
2331 * Get server sertificate PKEY and create ctx from it
2333 peer_cert = s->session->peer;
2335 *al = SSL_AD_HANDSHAKE_FAILURE;
2336 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
2337 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2341 pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
2342 if (pkey_ctx == NULL) {
2343 *al = SSL_AD_INTERNAL_ERROR;
2344 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2348 * If we have send a certificate, and certificate key
2349 * parameters match those of server certificate, use
2350 * certificate key for key exchange
2353 /* Otherwise, generate ephemeral key pair */
2355 pms = OPENSSL_malloc(pmslen);
2357 *al = SSL_AD_INTERNAL_ERROR;
2358 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2362 if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2363 /* Generate session key */
2364 || RAND_bytes(pms, pmslen) <= 0) {
2365 *al = SSL_AD_INTERNAL_ERROR;
2366 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2370 * Compute shared IV and store it in algorithm-specific context
2373 ukm_hash = EVP_MD_CTX_new();
2374 if (ukm_hash == NULL
2375 || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0
2376 || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2377 SSL3_RANDOM_SIZE) <= 0
2378 || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2379 SSL3_RANDOM_SIZE) <= 0
2380 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
2381 *al = SSL_AD_INTERNAL_ERROR;
2382 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2385 EVP_MD_CTX_free(ukm_hash);
2387 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
2388 EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
2389 *al = SSL_AD_INTERNAL_ERROR;
2390 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2393 /* Make GOST keytransport blob message */
2395 * Encapsulate it into sequence
2398 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
2399 *al = SSL_AD_INTERNAL_ERROR;
2400 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2404 if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)
2405 || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81))
2406 || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) {
2407 *al = SSL_AD_INTERNAL_ERROR;
2408 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2412 EVP_PKEY_CTX_free(pkey_ctx);
2413 s->s3->tmp.pms = pms;
2414 s->s3->tmp.pmslen = pmslen;
2418 EVP_PKEY_CTX_free(pkey_ctx);
2419 OPENSSL_clear_free(pms, pmslen);
2420 EVP_MD_CTX_free(ukm_hash);
2423 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2424 *al = SSL_AD_INTERNAL_ERROR;
2429 static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al)
2431 #ifndef OPENSSL_NO_SRP
2432 unsigned char *abytes = NULL;
2434 if (s->srp_ctx.A == NULL
2435 || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A),
2437 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2440 BN_bn2bin(s->srp_ctx.A, abytes);
2442 OPENSSL_free(s->session->srp_username);
2443 s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
2444 if (s->session->srp_username == NULL) {
2445 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE);
2451 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2452 *al = SSL_AD_INTERNAL_ERROR;
2457 int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt)
2459 unsigned long alg_k;
2462 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2464 if ((alg_k & SSL_PSK)
2465 && !tls_construct_cke_psk_preamble(s, pkt, &al))
2468 if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2469 if (!tls_construct_cke_rsa(s, pkt, &al))
2471 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
2472 if (!tls_construct_cke_dhe(s, pkt, &al))
2474 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
2475 if (!tls_construct_cke_ecdhe(s, pkt, &al))
2477 } else if (alg_k & SSL_kGOST) {
2478 if (!tls_construct_cke_gost(s, pkt, &al))
2480 } else if (alg_k & SSL_kSRP) {
2481 if (!tls_construct_cke_srp(s, pkt, &al))
2483 } else if (!(alg_k & SSL_kPSK)) {
2484 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2485 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2492 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2493 OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
2494 s->s3->tmp.pms = NULL;
2495 #ifndef OPENSSL_NO_PSK
2496 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2497 s->s3->tmp.psk = NULL;
2502 int tls_client_key_exchange_post_work(SSL *s)
2504 unsigned char *pms = NULL;
2507 pms = s->s3->tmp.pms;
2508 pmslen = s->s3->tmp.pmslen;
2510 #ifndef OPENSSL_NO_SRP
2512 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2513 if (!srp_generate_client_master_secret(s)) {
2514 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2515 ERR_R_INTERNAL_ERROR);
2522 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2523 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2524 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2527 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2528 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2529 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2530 /* ssl_generate_master_secret frees the pms even on error */
2538 #ifndef OPENSSL_NO_SCTP
2539 if (SSL_IS_DTLS(s)) {
2540 unsigned char sctpauthkey[64];
2541 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2544 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2547 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
2548 sizeof(DTLS1_SCTP_AUTH_LABEL));
2550 if (SSL_export_keying_material(s, sctpauthkey,
2551 sizeof(sctpauthkey), labelbuffer,
2552 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2555 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2556 sizeof(sctpauthkey), sctpauthkey);
2562 OPENSSL_clear_free(pms, pmslen);
2563 s->s3->tmp.pms = NULL;
2567 int tls_construct_client_verify(SSL *s, WPACKET *pkt)
2570 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2571 EVP_MD_CTX *mctx = NULL;
2575 unsigned char *sig = NULL;
2577 mctx = EVP_MD_CTX_new();
2579 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2582 pkey = s->cert->key->privatekey;
2584 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2585 if (hdatalen <= 0) {
2586 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2589 if (SSL_USE_SIGALGS(s)&& !tls12_get_sigandhash(pkt, pkey, md)) {
2590 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2594 fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
2596 sig = OPENSSL_malloc(EVP_PKEY_size(pkey));
2598 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
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, sig, &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(sig, NULL, u);
2621 if (!WPACKET_sub_memcpy_u16(pkt, sig, u)) {
2622 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2626 /* Digest cached records and discard handshake buffer */
2627 if (!ssl3_digest_cached_records(s, 0))
2631 EVP_MD_CTX_free(mctx);
2635 EVP_MD_CTX_free(mctx);
2636 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2641 * Check a certificate can be used for client authentication. Currently check
2642 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2643 * certificates can be used and optionally checks suitability for Suite B.
2645 static int ssl3_check_client_certificate(SSL *s)
2647 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
2649 /* If no suitable signature algorithm can't use certificate */
2650 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
2653 * If strict mode check suitability of chain before using it. This also
2654 * adjusts suite B digest if necessary.
2656 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
2657 !tls1_check_chain(s, NULL, NULL, NULL, -2))
2662 WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
2665 EVP_PKEY *pkey = NULL;
2668 if (wst == WORK_MORE_A) {
2669 /* Let cert callback update client certificates if required */
2670 if (s->cert->cert_cb) {
2671 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
2673 s->rwstate = SSL_X509_LOOKUP;
2677 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2678 ossl_statem_set_error(s);
2681 s->rwstate = SSL_NOTHING;
2683 if (ssl3_check_client_certificate(s))
2684 return WORK_FINISHED_CONTINUE;
2686 /* Fall through to WORK_MORE_B */
2690 /* We need to get a client cert */
2691 if (wst == WORK_MORE_B) {
2693 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2694 * return(-1); We then get retied later
2696 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2698 s->rwstate = SSL_X509_LOOKUP;
2701 s->rwstate = SSL_NOTHING;
2702 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2703 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2705 } else if (i == 1) {
2707 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
2708 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2712 EVP_PKEY_free(pkey);
2713 if (i && !ssl3_check_client_certificate(s))
2716 if (s->version == SSL3_VERSION) {
2717 s->s3->tmp.cert_req = 0;
2718 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2719 return WORK_FINISHED_CONTINUE;
2721 s->s3->tmp.cert_req = 2;
2722 if (!ssl3_digest_cached_records(s, 0)) {
2723 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2724 ossl_statem_set_error(s);
2730 return WORK_FINISHED_CONTINUE;
2733 /* Shouldn't ever get here */
2737 int tls_construct_client_certificate(SSL *s, WPACKET *pkt)
2739 if (!ssl3_output_cert_chain(s, pkt,
2740 (s->s3->tmp.cert_req ==
2741 2) ? NULL : s->cert->key)) {
2742 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
2743 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2750 #define has_bits(i,m) (((i)&(m)) == (m))
2752 int ssl3_check_cert_and_algorithm(SSL *s)
2755 #ifndef OPENSSL_NO_EC
2759 EVP_PKEY *pkey = NULL;
2760 int al = SSL_AD_HANDSHAKE_FAILURE;
2762 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2763 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2765 /* we don't have a certificate */
2766 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
2769 /* This is the passed certificate */
2771 #ifndef OPENSSL_NO_EC
2772 idx = s->session->peer_type;
2773 if (idx == SSL_PKEY_ECC) {
2774 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
2776 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2781 } else if (alg_a & SSL_aECDSA) {
2782 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2783 SSL_R_MISSING_ECDSA_SIGNING_CERT);
2787 pkey = X509_get0_pubkey(s->session->peer);
2788 i = X509_certificate_type(s->session->peer, pkey);
2790 /* Check that we have a certificate if we require one */
2791 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2792 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2793 SSL_R_MISSING_RSA_SIGNING_CERT);
2796 #ifndef OPENSSL_NO_DSA
2797 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2798 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2799 SSL_R_MISSING_DSA_SIGNING_CERT);
2803 #ifndef OPENSSL_NO_RSA
2804 if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
2805 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2806 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2807 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2811 #ifndef OPENSSL_NO_DH
2812 if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
2813 al = SSL_AD_INTERNAL_ERROR;
2814 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
2821 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2825 #ifndef OPENSSL_NO_NEXTPROTONEG
2826 int tls_construct_next_proto(SSL *s, WPACKET *pkt)
2828 size_t len, padding_len;
2829 unsigned char *padding = NULL;
2831 len = s->next_proto_negotiated_len;
2832 padding_len = 32 - ((len + 2) % 32);
2834 if (!WPACKET_sub_memcpy_u8(pkt, s->next_proto_negotiated, len)
2835 || !WPACKET_sub_allocate_bytes_u8(pkt, padding_len, &padding)) {
2836 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2840 memset(padding, 0, padding_len);
2844 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2849 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2852 #ifndef OPENSSL_NO_ENGINE
2853 if (s->ctx->client_cert_engine) {
2854 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2855 SSL_get_client_CA_list(s),
2856 px509, ppkey, NULL, NULL, NULL);
2861 if (s->ctx->client_cert_cb)
2862 i = s->ctx->client_cert_cb(s, px509, ppkey);
2866 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt)
2869 size_t totlen = 0, len, maxlen;
2870 int empty_reneg_info_scsv = !s->renegotiate;
2871 /* Set disabled masks for this session */
2872 ssl_set_client_disabled(s);
2877 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
2878 # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6
2879 # error Max cipher length too short
2882 * Some servers hang if client hello > 256 bytes as hack workaround
2883 * chop number of supported ciphers to keep it well below this if we
2886 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2887 maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
2890 /* Maximum length that can be stored in 2 bytes. Length must be even */
2893 if (empty_reneg_info_scsv)
2895 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
2898 for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) {
2899 const SSL_CIPHER *c;
2901 c = sk_SSL_CIPHER_value(sk, i);
2902 /* Skip disabled ciphers */
2903 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
2906 if (!s->method->put_cipher_by_char(c, pkt, &len)) {
2907 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2915 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE);
2920 if (empty_reneg_info_scsv) {
2921 static SSL_CIPHER scsv = {
2922 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2924 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2925 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2929 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
2930 static SSL_CIPHER scsv = {
2931 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2933 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2934 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);