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) {
125 case TLS_ST_CW_CLNT_HELLO:
126 if (mt == SSL3_MT_SERVER_HELLO) {
127 st->hand_state = TLS_ST_CR_SRVR_HELLO;
131 if (SSL_IS_DTLS(s)) {
132 if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
133 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
139 case TLS_ST_CR_SRVR_HELLO:
141 if (s->tlsext_ticket_expected) {
142 if (mt == SSL3_MT_NEWSESSION_TICKET) {
143 st->hand_state = TLS_ST_CR_SESSION_TICKET;
146 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
147 st->hand_state = TLS_ST_CR_CHANGE;
151 if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
152 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
154 } else if (s->version >= TLS1_VERSION
155 && s->tls_session_secret_cb != NULL
156 && s->session->tlsext_tick != NULL
157 && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
159 * Normally, we can tell if the server is resuming the session
160 * from the session ID. EAP-FAST (RFC 4851), however, relies on
161 * the next server message after the ServerHello to determine if
162 * the server is resuming.
165 st->hand_state = TLS_ST_CR_CHANGE;
167 } else if (!(s->s3->tmp.new_cipher->algorithm_auth
168 & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
169 if (mt == SSL3_MT_CERTIFICATE) {
170 st->hand_state = TLS_ST_CR_CERT;
174 ske_expected = key_exchange_expected(s);
175 /* SKE is optional for some PSK ciphersuites */
177 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
178 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
179 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
180 st->hand_state = TLS_ST_CR_KEY_EXCH;
183 } else if (mt == SSL3_MT_CERTIFICATE_REQUEST
184 && cert_req_allowed(s)) {
185 st->hand_state = TLS_ST_CR_CERT_REQ;
187 } else if (mt == SSL3_MT_SERVER_DONE) {
188 st->hand_state = TLS_ST_CR_SRVR_DONE;
197 * The CertificateStatus message is optional even if
198 * |tlsext_status_expected| is set
200 if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
201 st->hand_state = TLS_ST_CR_CERT_STATUS;
206 case TLS_ST_CR_CERT_STATUS:
207 ske_expected = key_exchange_expected(s);
208 /* SKE is optional for some PSK ciphersuites */
209 if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
210 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
211 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
212 st->hand_state = TLS_ST_CR_KEY_EXCH;
219 case TLS_ST_CR_KEY_EXCH:
220 if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
221 if (cert_req_allowed(s)) {
222 st->hand_state = TLS_ST_CR_CERT_REQ;
229 case TLS_ST_CR_CERT_REQ:
230 if (mt == SSL3_MT_SERVER_DONE) {
231 st->hand_state = TLS_ST_CR_SRVR_DONE;
236 case TLS_ST_CW_FINISHED:
237 if (s->tlsext_ticket_expected) {
238 if (mt == SSL3_MT_NEWSESSION_TICKET) {
239 st->hand_state = TLS_ST_CR_SESSION_TICKET;
242 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
243 st->hand_state = TLS_ST_CR_CHANGE;
248 case TLS_ST_CR_SESSION_TICKET:
249 if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
250 st->hand_state = TLS_ST_CR_CHANGE;
255 case TLS_ST_CR_CHANGE:
256 if (mt == SSL3_MT_FINISHED) {
257 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 /* Renegotiation - fall through */
285 st->hand_state = TLS_ST_CW_CLNT_HELLO;
286 return WRITE_TRAN_CONTINUE;
288 case TLS_ST_CW_CLNT_HELLO:
290 * No transition at the end of writing because we don't know what
293 return WRITE_TRAN_FINISHED;
295 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
296 st->hand_state = TLS_ST_CW_CLNT_HELLO;
297 return WRITE_TRAN_CONTINUE;
299 case TLS_ST_CR_SRVR_DONE:
300 if (s->s3->tmp.cert_req)
301 st->hand_state = TLS_ST_CW_CERT;
303 st->hand_state = TLS_ST_CW_KEY_EXCH;
304 return WRITE_TRAN_CONTINUE;
307 st->hand_state = TLS_ST_CW_KEY_EXCH;
308 return WRITE_TRAN_CONTINUE;
310 case TLS_ST_CW_KEY_EXCH:
312 * For TLS, cert_req is set to 2, so a cert chain of nothing is
313 * sent, but no verify packet is sent
316 * XXX: For now, we do not support client authentication in ECDH
317 * cipher suites with ECDH (rather than ECDSA) certificates. We
318 * need to skip the certificate verify message when client's
319 * ECDH public key is sent inside the client certificate.
321 if (s->s3->tmp.cert_req == 1) {
322 st->hand_state = TLS_ST_CW_CERT_VRFY;
324 st->hand_state = TLS_ST_CW_CHANGE;
326 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
327 st->hand_state = TLS_ST_CW_CHANGE;
329 return WRITE_TRAN_CONTINUE;
331 case TLS_ST_CW_CERT_VRFY:
332 st->hand_state = TLS_ST_CW_CHANGE;
333 return WRITE_TRAN_CONTINUE;
335 case TLS_ST_CW_CHANGE:
336 #if defined(OPENSSL_NO_NEXTPROTONEG)
337 st->hand_state = TLS_ST_CW_FINISHED;
339 if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
340 st->hand_state = TLS_ST_CW_NEXT_PROTO;
342 st->hand_state = TLS_ST_CW_FINISHED;
344 return WRITE_TRAN_CONTINUE;
346 #if !defined(OPENSSL_NO_NEXTPROTONEG)
347 case TLS_ST_CW_NEXT_PROTO:
348 st->hand_state = TLS_ST_CW_FINISHED;
349 return WRITE_TRAN_CONTINUE;
352 case TLS_ST_CW_FINISHED:
354 st->hand_state = TLS_ST_OK;
355 ossl_statem_set_in_init(s, 0);
356 return WRITE_TRAN_CONTINUE;
358 return WRITE_TRAN_FINISHED;
361 case TLS_ST_CR_FINISHED:
363 st->hand_state = TLS_ST_CW_CHANGE;
364 return WRITE_TRAN_CONTINUE;
366 st->hand_state = TLS_ST_OK;
367 ossl_statem_set_in_init(s, 0);
368 return WRITE_TRAN_CONTINUE;
372 /* Shouldn't happen */
373 return WRITE_TRAN_ERROR;
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) {
386 case TLS_ST_CW_CLNT_HELLO:
388 if (SSL_IS_DTLS(s)) {
389 /* every DTLS ClientHello resets Finished MAC */
390 if (!ssl3_init_finished_mac(s)) {
391 ossl_statem_set_error(s);
397 case TLS_ST_CW_CHANGE:
398 if (SSL_IS_DTLS(s)) {
401 * We're into the last flight so we don't retransmit these
402 * messages unless we need to.
406 #ifndef OPENSSL_NO_SCTP
407 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
408 return dtls_wait_for_dry(s);
411 return WORK_FINISHED_CONTINUE;
414 return tls_finish_handshake(s, wst);
417 /* No pre work to be done */
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) {
435 case TLS_ST_CW_CLNT_HELLO:
436 if (wst == WORK_MORE_A && statem_flush(s) != 1)
439 if (SSL_IS_DTLS(s)) {
440 /* Treat the next message as the first packet */
445 case TLS_ST_CW_KEY_EXCH:
446 if (tls_client_key_exchange_post_work(s) == 0)
450 case TLS_ST_CW_CHANGE:
451 s->session->cipher = s->s3->tmp.new_cipher;
452 #ifdef OPENSSL_NO_COMP
453 s->session->compress_meth = 0;
455 if (s->s3->tmp.new_compression == NULL)
456 s->session->compress_meth = 0;
458 s->session->compress_meth = s->s3->tmp.new_compression->id;
460 if (!s->method->ssl3_enc->setup_key_block(s))
463 if (!s->method->ssl3_enc->change_cipher_state(s,
464 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
467 if (SSL_IS_DTLS(s)) {
468 #ifndef OPENSSL_NO_SCTP
471 * Change to new shared key of SCTP-Auth, will be ignored if
474 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
479 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
483 case TLS_ST_CW_FINISHED:
484 #ifndef OPENSSL_NO_SCTP
485 if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
487 * Change to new shared key of SCTP-Auth, will be ignored if
490 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
494 if (statem_flush(s) != 1)
499 /* No post work to be done */
503 return WORK_FINISHED_CONTINUE;
507 * Construct a message to be sent from the client to the server.
509 * Valid return values are:
513 int ossl_statem_client_construct_message(SSL *s)
515 OSSL_STATEM *st = &s->statem;
517 switch (st->hand_state) {
518 case TLS_ST_CW_CLNT_HELLO:
519 return tls_construct_client_hello(s);
522 return tls_construct_client_certificate(s);
524 case TLS_ST_CW_KEY_EXCH:
525 return tls_construct_client_key_exchange(s);
527 case TLS_ST_CW_CERT_VRFY:
528 return tls_construct_client_verify(s);
530 case TLS_ST_CW_CHANGE:
532 return dtls_construct_change_cipher_spec(s);
534 return tls_construct_change_cipher_spec(s);
536 #if !defined(OPENSSL_NO_NEXTPROTONEG)
537 case TLS_ST_CW_NEXT_PROTO:
538 return tls_construct_next_proto(s);
540 case TLS_ST_CW_FINISHED:
541 return tls_construct_finished(s,
543 ssl3_enc->client_finished_label,
545 ssl3_enc->client_finished_label_len);
548 /* Shouldn't happen */
556 * Returns the maximum allowed length for the current message that we are
557 * reading. Excludes the message header.
559 unsigned long ossl_statem_client_max_message_size(SSL *s)
561 OSSL_STATEM *st = &s->statem;
563 switch (st->hand_state) {
564 case TLS_ST_CR_SRVR_HELLO:
565 return SERVER_HELLO_MAX_LENGTH;
567 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
568 return HELLO_VERIFY_REQUEST_MAX_LENGTH;
571 return s->max_cert_list;
573 case TLS_ST_CR_CERT_STATUS:
574 return SSL3_RT_MAX_PLAIN_LENGTH;
576 case TLS_ST_CR_KEY_EXCH:
577 return SERVER_KEY_EXCH_MAX_LENGTH;
579 case TLS_ST_CR_CERT_REQ:
581 * Set to s->max_cert_list for compatibility with previous releases. In
582 * practice these messages can get quite long if servers are configured
583 * to provide a long list of acceptable CAs
585 return s->max_cert_list;
587 case TLS_ST_CR_SRVR_DONE:
588 return SERVER_HELLO_DONE_MAX_LENGTH;
590 case TLS_ST_CR_CHANGE:
591 if (s->version == DTLS1_BAD_VER)
593 return CCS_MAX_LENGTH;
595 case TLS_ST_CR_SESSION_TICKET:
596 return SSL3_RT_MAX_PLAIN_LENGTH;
598 case TLS_ST_CR_FINISHED:
599 return FINISHED_MAX_LENGTH;
602 /* Shouldn't happen */
610 * Process a message that the client has been received from the server.
612 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
614 OSSL_STATEM *st = &s->statem;
616 switch (st->hand_state) {
617 case TLS_ST_CR_SRVR_HELLO:
618 return tls_process_server_hello(s, pkt);
620 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
621 return dtls_process_hello_verify(s, pkt);
624 return tls_process_server_certificate(s, pkt);
626 case TLS_ST_CR_CERT_STATUS:
627 return tls_process_cert_status(s, pkt);
629 case TLS_ST_CR_KEY_EXCH:
630 return tls_process_key_exchange(s, pkt);
632 case TLS_ST_CR_CERT_REQ:
633 return tls_process_certificate_request(s, pkt);
635 case TLS_ST_CR_SRVR_DONE:
636 return tls_process_server_done(s, pkt);
638 case TLS_ST_CR_CHANGE:
639 return tls_process_change_cipher_spec(s, pkt);
641 case TLS_ST_CR_SESSION_TICKET:
642 return tls_process_new_session_ticket(s, pkt);
644 case TLS_ST_CR_FINISHED:
645 return tls_process_finished(s, pkt);
648 /* Shouldn't happen */
652 return MSG_PROCESS_ERROR;
656 * Perform any further processing required following the receipt of a message
659 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
661 OSSL_STATEM *st = &s->statem;
663 switch (st->hand_state) {
664 case TLS_ST_CR_CERT_REQ:
665 return tls_prepare_client_certificate(s, wst);
667 #ifndef OPENSSL_NO_SCTP
668 case TLS_ST_CR_SRVR_DONE:
669 /* We only get here if we are using SCTP and we are renegotiating */
670 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
671 s->s3->in_read_app_data = 2;
672 s->rwstate = SSL_READING;
673 BIO_clear_retry_flags(SSL_get_rbio(s));
674 BIO_set_retry_read(SSL_get_rbio(s));
675 ossl_statem_set_sctp_read_sock(s, 1);
678 ossl_statem_set_sctp_read_sock(s, 0);
679 return WORK_FINISHED_STOP;
686 /* Shouldn't happen */
690 int tls_construct_client_hello(SSL *s)
695 int al = SSL_AD_HANDSHAKE_FAILURE;
696 #ifndef OPENSSL_NO_COMP
699 SSL_SESSION *sess = s->session;
702 if (!WPACKET_init(&pkt, s->init_buf)
703 || !WPACKET_set_max_size(&pkt, SSL3_RT_MAX_PLAIN_LENGTH)) {
704 /* Should not happen */
705 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
709 /* Work out what SSL/TLS/DTLS version to use */
710 protverr = ssl_set_client_hello_version(s);
712 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
716 if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) ||
718 * In the case of EAP-FAST, we can have a pre-shared
719 * "ticket" without a session ID.
721 (!sess->session_id_length && !sess->tlsext_tick) ||
722 (sess->not_resumable)) {
723 if (!ssl_get_new_session(s, 0))
726 /* else use the pre-loaded session */
728 p = s->s3->client_random;
731 * for DTLS if client_random is initialized, reuse it, we are
732 * required to use same upon reply to HelloVerify
734 if (SSL_IS_DTLS(s)) {
737 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
746 if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0)
749 if (!ssl_set_handshake_header2(s, &pkt, SSL3_MT_CLIENT_HELLO)) {
750 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
751 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
756 * version indicates the negotiated version: for example from
757 * an SSLv2/v3 compatible client hello). The client_version
758 * field is the maximum version we permit and it is also
759 * used in RSA encrypted premaster secrets. Some servers can
760 * choke if we initially report a higher version then
761 * renegotiate to a lower one in the premaster secret. This
762 * didn't happen with TLS 1.0 as most servers supported it
763 * but it can with TLS 1.1 or later if the server only supports
766 * Possible scenario with previous logic:
767 * 1. Client hello indicates TLS 1.2
768 * 2. Server hello says TLS 1.0
769 * 3. RSA encrypted premaster secret uses 1.2.
770 * 4. Handshake proceeds using TLS 1.0.
771 * 5. Server sends hello request to renegotiate.
772 * 6. Client hello indicates TLS v1.0 as we now
773 * know that is maximum server supports.
774 * 7. Server chokes on RSA encrypted premaster secret
775 * containing version 1.0.
777 * For interoperability it should be OK to always use the
778 * maximum version we support in client hello and then rely
779 * on the checking of version to ensure the servers isn't
780 * being inconsistent: for example initially negotiating with
781 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
782 * client_version in client hello and not resetting it to
783 * the negotiated version.
785 if (!WPACKET_put_bytes(&pkt, s->client_version, 2)
786 || !WPACKET_memcpy(&pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) {
787 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
795 i = s->session->session_id_length;
796 if (i > (int)sizeof(s->session->session_id)
797 || !WPACKET_start_sub_packet_len(&pkt, 1)
798 || (i != 0 && !WPACKET_memcpy(&pkt, s->session->session_id, i))
799 || !WPACKET_close(&pkt)) {
800 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
804 /* cookie stuff for DTLS */
805 if (SSL_IS_DTLS(s)) {
806 if (s->d1->cookie_len > sizeof(s->d1->cookie)
807 || !WPACKET_sub_memcpy(&pkt, s->d1->cookie, s->d1->cookie_len,
809 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
814 /* Ciphers supported */
815 if (!WPACKET_start_sub_packet_len(&pkt, 2)) {
816 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
819 /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */
820 if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &pkt))
822 if (!WPACKET_close(&pkt)) {
823 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
828 if (!WPACKET_start_sub_packet_len(&pkt, 1)) {
829 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
832 #ifndef OPENSSL_NO_COMP
833 if (ssl_allow_compression(s) && s->ctx->comp_methods) {
834 int compnum = sk_SSL_COMP_num(s->ctx->comp_methods);
835 for (i = 0; i < compnum; i++) {
836 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
837 if (!WPACKET_put_bytes(&pkt, comp->id, 1)) {
838 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
844 /* Add the NULL method */
845 if (!WPACKET_put_bytes(&pkt, 0, 1) || !WPACKET_close(&pkt)) {
846 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
851 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
852 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
855 if (!WPACKET_start_sub_packet_len(&pkt, 2)
857 * If extensions are of zero length then we don't even add the
858 * extensions length bytes
860 || !WPACKET_set_flags(&pkt,
861 OPENSSL_WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH)
862 || !ssl_add_clienthello_tlsext(s, &pkt, &al)
863 || !WPACKET_close(&pkt)) {
864 ssl3_send_alert(s, SSL3_AL_FATAL, al);
865 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
869 if (!WPACKET_close(&pkt) || !ssl_close_construct_packet(s, &pkt)) {
870 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
871 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
877 ossl_statem_set_error(s);
878 WPACKET_cleanup(&pkt);
882 MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
885 unsigned int cookie_len;
888 if (!PACKET_forward(pkt, 2)
889 || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
890 al = SSL_AD_DECODE_ERROR;
891 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
895 cookie_len = PACKET_remaining(&cookiepkt);
896 if (cookie_len > sizeof(s->d1->cookie)) {
897 al = SSL_AD_ILLEGAL_PARAMETER;
898 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
902 if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
903 al = SSL_AD_DECODE_ERROR;
904 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
907 s->d1->cookie_len = cookie_len;
909 return MSG_PROCESS_FINISHED_READING;
911 ssl3_send_alert(s, SSL3_AL_FATAL, al);
912 ossl_statem_set_error(s);
913 return MSG_PROCESS_ERROR;
916 MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
918 STACK_OF(SSL_CIPHER) *sk;
921 size_t session_id_len;
922 const unsigned char *cipherchars;
923 int i, al = SSL_AD_INTERNAL_ERROR;
924 unsigned int compression;
925 unsigned int sversion;
927 #ifndef OPENSSL_NO_COMP
931 if (!PACKET_get_net_2(pkt, &sversion)) {
932 al = SSL_AD_DECODE_ERROR;
933 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
937 protverr = ssl_choose_client_version(s, sversion);
939 al = SSL_AD_PROTOCOL_VERSION;
940 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
944 /* load the server hello data */
945 /* load the server random */
946 if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
947 al = SSL_AD_DECODE_ERROR;
948 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
954 /* Get the session-id. */
955 if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
956 al = SSL_AD_DECODE_ERROR;
957 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
960 session_id_len = PACKET_remaining(&session_id);
961 if (session_id_len > sizeof s->session->session_id
962 || session_id_len > SSL3_SESSION_ID_SIZE) {
963 al = SSL_AD_ILLEGAL_PARAMETER;
964 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
968 if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
969 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
970 al = SSL_AD_DECODE_ERROR;
975 * Check if we can resume the session based on external pre-shared secret.
976 * EAP-FAST (RFC 4851) supports two types of session resumption.
977 * Resumption based on server-side state works with session IDs.
978 * Resumption based on pre-shared Protected Access Credentials (PACs)
979 * works by overriding the SessionTicket extension at the application
980 * layer, and does not send a session ID. (We do not know whether EAP-FAST
981 * servers would honour the session ID.) Therefore, the session ID alone
982 * is not a reliable indicator of session resumption, so we first check if
983 * we can resume, and later peek at the next handshake message to see if the
984 * server wants to resume.
986 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
987 s->session->tlsext_tick) {
988 const SSL_CIPHER *pref_cipher = NULL;
989 s->session->master_key_length = sizeof(s->session->master_key);
990 if (s->tls_session_secret_cb(s, s->session->master_key,
991 &s->session->master_key_length,
993 s->tls_session_secret_cb_arg)) {
994 s->session->cipher = pref_cipher ?
995 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
997 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
998 al = SSL_AD_INTERNAL_ERROR;
1003 if (session_id_len != 0 && session_id_len == s->session->session_id_length
1004 && memcmp(PACKET_data(&session_id), s->session->session_id,
1005 session_id_len) == 0) {
1006 if (s->sid_ctx_length != s->session->sid_ctx_length
1007 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
1008 /* actually a client application bug */
1009 al = SSL_AD_ILLEGAL_PARAMETER;
1010 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1011 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1017 * If we were trying for session-id reuse but the server
1018 * didn't echo the ID, make a new SSL_SESSION.
1019 * In the case of EAP-FAST and PAC, we do not send a session ID,
1020 * so the PAC-based session secret is always preserved. It'll be
1021 * overwritten if the server refuses resumption.
1023 if (s->session->session_id_length > 0) {
1024 s->ctx->stats.sess_miss++;
1025 if (!ssl_get_new_session(s, 0)) {
1030 s->session->ssl_version = s->version;
1031 s->session->session_id_length = session_id_len;
1032 /* session_id_len could be 0 */
1033 memcpy(s->session->session_id, PACKET_data(&session_id),
1037 /* Session version and negotiated protocol version should match */
1038 if (s->version != s->session->ssl_version) {
1039 al = SSL_AD_PROTOCOL_VERSION;
1041 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1042 SSL_R_SSL_SESSION_VERSION_MISMATCH);
1046 c = ssl_get_cipher_by_char(s, cipherchars);
1048 /* unknown cipher */
1049 al = SSL_AD_ILLEGAL_PARAMETER;
1050 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1054 * Now that we know the version, update the check to see if it's an allowed
1057 s->s3->tmp.min_ver = s->version;
1058 s->s3->tmp.max_ver = s->version;
1060 * If it is a disabled cipher we either didn't send it in client hello,
1061 * or it's not allowed for the selected protocol. So we return an error.
1063 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1064 al = SSL_AD_ILLEGAL_PARAMETER;
1065 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1069 sk = ssl_get_ciphers_by_id(s);
1070 i = sk_SSL_CIPHER_find(sk, c);
1072 /* we did not say we would use this cipher */
1073 al = SSL_AD_ILLEGAL_PARAMETER;
1074 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1079 * Depending on the session caching (internal/external), the cipher
1080 * and/or cipher_id values may not be set. Make sure that cipher_id is
1081 * set and use it for comparison.
1083 if (s->session->cipher)
1084 s->session->cipher_id = s->session->cipher->id;
1085 if (s->hit && (s->session->cipher_id != c->id)) {
1086 al = SSL_AD_ILLEGAL_PARAMETER;
1087 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1088 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1091 s->s3->tmp.new_cipher = c;
1092 /* lets get the compression algorithm */
1094 if (!PACKET_get_1(pkt, &compression)) {
1095 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1096 al = SSL_AD_DECODE_ERROR;
1099 #ifdef OPENSSL_NO_COMP
1100 if (compression != 0) {
1101 al = SSL_AD_ILLEGAL_PARAMETER;
1102 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1103 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1107 * If compression is disabled we'd better not try to resume a session
1108 * using compression.
1110 if (s->session->compress_meth != 0) {
1111 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1115 if (s->hit && compression != s->session->compress_meth) {
1116 al = SSL_AD_ILLEGAL_PARAMETER;
1117 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1118 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1121 if (compression == 0)
1123 else if (!ssl_allow_compression(s)) {
1124 al = SSL_AD_ILLEGAL_PARAMETER;
1125 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1128 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1131 if (compression != 0 && comp == NULL) {
1132 al = SSL_AD_ILLEGAL_PARAMETER;
1133 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1134 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1137 s->s3->tmp.new_compression = comp;
1141 /* TLS extensions */
1142 if (!ssl_parse_serverhello_tlsext(s, pkt)) {
1143 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1147 if (PACKET_remaining(pkt) != 0) {
1148 /* wrong packet length */
1149 al = SSL_AD_DECODE_ERROR;
1150 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1153 #ifndef OPENSSL_NO_SCTP
1154 if (SSL_IS_DTLS(s) && s->hit) {
1155 unsigned char sctpauthkey[64];
1156 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
1159 * Add new shared key for SCTP-Auth, will be ignored if
1162 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
1163 sizeof(DTLS1_SCTP_AUTH_LABEL));
1165 if (SSL_export_keying_material(s, sctpauthkey,
1166 sizeof(sctpauthkey),
1168 sizeof(labelbuffer), NULL, 0, 0) <= 0)
1171 BIO_ctrl(SSL_get_wbio(s),
1172 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
1173 sizeof(sctpauthkey), sctpauthkey);
1177 return MSG_PROCESS_CONTINUE_READING;
1179 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1181 ossl_statem_set_error(s);
1182 return MSG_PROCESS_ERROR;
1185 MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
1187 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
1188 unsigned long cert_list_len, cert_len;
1190 const unsigned char *certstart, *certbytes;
1191 STACK_OF(X509) *sk = NULL;
1192 EVP_PKEY *pkey = NULL;
1194 if ((sk = sk_X509_new_null()) == NULL) {
1195 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1199 if (!PACKET_get_net_3(pkt, &cert_list_len)
1200 || PACKET_remaining(pkt) != cert_list_len) {
1201 al = SSL_AD_DECODE_ERROR;
1202 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1205 while (PACKET_remaining(pkt)) {
1206 if (!PACKET_get_net_3(pkt, &cert_len)
1207 || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
1208 al = SSL_AD_DECODE_ERROR;
1209 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1210 SSL_R_CERT_LENGTH_MISMATCH);
1214 certstart = certbytes;
1215 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1217 al = SSL_AD_BAD_CERTIFICATE;
1218 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1221 if (certbytes != (certstart + cert_len)) {
1222 al = SSL_AD_DECODE_ERROR;
1223 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1224 SSL_R_CERT_LENGTH_MISMATCH);
1227 if (!sk_X509_push(sk, x)) {
1228 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1234 i = ssl_verify_cert_chain(s, sk);
1235 if ((s->verify_mode & SSL_VERIFY_PEER) && i <= 0) {
1236 al = ssl_verify_alarm_type(s->verify_result);
1237 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1238 SSL_R_CERTIFICATE_VERIFY_FAILED);
1241 ERR_clear_error(); /* but we keep s->verify_result */
1243 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
1244 al = SSL_AD_HANDSHAKE_FAILURE;
1248 s->session->peer_chain = sk;
1250 * Inconsistency alert: cert_chain does include the peer's certificate,
1251 * which we don't include in statem_srvr.c
1253 x = sk_X509_value(sk, 0);
1256 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1259 pkey = X509_get0_pubkey(x);
1261 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1264 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1265 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1269 i = ssl_cert_type(x, pkey);
1273 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1274 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1278 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1279 if (exp_idx >= 0 && i != exp_idx
1280 && (exp_idx != SSL_PKEY_GOST_EC ||
1281 (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
1282 && i != SSL_PKEY_GOST01))) {
1284 al = SSL_AD_ILLEGAL_PARAMETER;
1285 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1286 SSL_R_WRONG_CERTIFICATE_TYPE);
1289 s->session->peer_type = i;
1291 X509_free(s->session->peer);
1293 s->session->peer = x;
1294 s->session->verify_result = s->verify_result;
1297 ret = MSG_PROCESS_CONTINUE_READING;
1301 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1303 ossl_statem_set_error(s);
1306 sk_X509_pop_free(sk, X509_free);
1310 static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al)
1312 #ifndef OPENSSL_NO_PSK
1313 PACKET psk_identity_hint;
1315 /* PSK ciphersuites are preceded by an identity hint */
1317 if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
1318 *al = SSL_AD_DECODE_ERROR;
1319 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH);
1324 * Store PSK identity hint for later use, hint is used in
1325 * tls_construct_client_key_exchange. Assume that the maximum length of
1326 * a PSK identity hint can be as long as the maximum length of a PSK
1329 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1330 *al = SSL_AD_HANDSHAKE_FAILURE;
1331 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG);
1335 if (PACKET_remaining(&psk_identity_hint) == 0) {
1336 OPENSSL_free(s->session->psk_identity_hint);
1337 s->session->psk_identity_hint = NULL;
1338 } else if (!PACKET_strndup(&psk_identity_hint,
1339 &s->session->psk_identity_hint)) {
1340 *al = SSL_AD_INTERNAL_ERROR;
1346 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
1347 *al = SSL_AD_INTERNAL_ERROR;
1352 static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1354 #ifndef OPENSSL_NO_SRP
1355 PACKET prime, generator, salt, server_pub;
1357 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1358 || !PACKET_get_length_prefixed_2(pkt, &generator)
1359 || !PACKET_get_length_prefixed_1(pkt, &salt)
1360 || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
1361 *al = SSL_AD_DECODE_ERROR;
1362 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH);
1367 BN_bin2bn(PACKET_data(&prime),
1368 PACKET_remaining(&prime), NULL)) == NULL
1370 BN_bin2bn(PACKET_data(&generator),
1371 PACKET_remaining(&generator), NULL)) == NULL
1373 BN_bin2bn(PACKET_data(&salt),
1374 PACKET_remaining(&salt), NULL)) == NULL
1376 BN_bin2bn(PACKET_data(&server_pub),
1377 PACKET_remaining(&server_pub), NULL)) == NULL) {
1378 *al = SSL_AD_INTERNAL_ERROR;
1379 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
1383 if (!srp_verify_server_param(s, al)) {
1384 *al = SSL_AD_DECODE_ERROR;
1385 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
1389 /* We must check if there is a certificate */
1390 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1391 *pkey = X509_get0_pubkey(s->session->peer);
1395 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
1396 *al = SSL_AD_INTERNAL_ERROR;
1401 static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1403 #ifndef OPENSSL_NO_DH
1404 PACKET prime, generator, pub_key;
1405 EVP_PKEY *peer_tmp = NULL;
1408 BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
1410 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1411 || !PACKET_get_length_prefixed_2(pkt, &generator)
1412 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1413 *al = SSL_AD_DECODE_ERROR;
1414 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
1418 peer_tmp = EVP_PKEY_new();
1421 if (peer_tmp == NULL || dh == NULL) {
1422 *al = SSL_AD_INTERNAL_ERROR;
1423 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
1427 p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
1428 g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), NULL);
1429 bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
1431 if (p == NULL || g == NULL || bnpub_key == NULL) {
1432 *al = SSL_AD_INTERNAL_ERROR;
1433 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1437 if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) {
1438 *al = SSL_AD_DECODE_ERROR;
1439 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
1443 if (!DH_set0_pqg(dh, p, NULL, g)) {
1444 *al = SSL_AD_INTERNAL_ERROR;
1445 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1450 if (!DH_set0_key(dh, bnpub_key, NULL)) {
1451 *al = SSL_AD_INTERNAL_ERROR;
1452 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1457 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1458 *al = SSL_AD_HANDSHAKE_FAILURE;
1459 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
1463 if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
1464 *al = SSL_AD_INTERNAL_ERROR;
1465 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
1469 s->s3->peer_tmp = peer_tmp;
1472 * FIXME: This makes assumptions about which ciphersuites come with
1473 * public keys. We should have a less ad-hoc way of doing this
1475 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1476 *pkey = X509_get0_pubkey(s->session->peer);
1477 /* else anonymous DH, so no certificate or pkey. */
1486 EVP_PKEY_free(peer_tmp);
1490 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
1491 *al = SSL_AD_INTERNAL_ERROR;
1496 static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1498 #ifndef OPENSSL_NO_EC
1500 const unsigned char *ecparams;
1502 unsigned int curve_flags;
1503 EVP_PKEY_CTX *pctx = NULL;
1506 * Extract elliptic curve parameters and the server's ephemeral ECDH
1507 * public key. For now we only support named (not generic) curves and
1508 * ECParameters in this case is just three bytes.
1510 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1511 *al = SSL_AD_DECODE_ERROR;
1512 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
1516 * Check curve is one of our preferences, if not server has sent an
1517 * invalid curve. ECParameters is 3 bytes.
1519 if (!tls1_check_curve(s, ecparams, 3)) {
1520 *al = SSL_AD_DECODE_ERROR;
1521 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
1525 curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
1527 if (curve_nid == 0) {
1528 *al = SSL_AD_INTERNAL_ERROR;
1529 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
1530 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1534 if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
1535 EVP_PKEY *key = EVP_PKEY_new();
1537 if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
1538 *al = SSL_AD_INTERNAL_ERROR;
1539 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1543 s->s3->peer_tmp = key;
1545 /* Set up EVP_PKEY with named curve as parameters */
1546 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
1548 || EVP_PKEY_paramgen_init(pctx) <= 0
1549 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
1550 || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
1551 *al = SSL_AD_INTERNAL_ERROR;
1552 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1553 EVP_PKEY_CTX_free(pctx);
1556 EVP_PKEY_CTX_free(pctx);
1560 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1561 *al = SSL_AD_DECODE_ERROR;
1562 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
1566 if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
1567 PACKET_data(&encoded_pt),
1568 PACKET_remaining(&encoded_pt))) {
1569 *al = SSL_AD_DECODE_ERROR;
1570 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
1575 * The ECC/TLS specification does not mention the use of DSA to sign
1576 * ECParameters in the server key exchange message. We do support RSA
1579 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
1580 *pkey = X509_get0_pubkey(s->session->peer);
1581 else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
1582 *pkey = X509_get0_pubkey(s->session->peer);
1583 /* else anonymous ECDH, so no certificate or pkey. */
1587 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
1588 *al = SSL_AD_INTERNAL_ERROR;
1593 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1597 EVP_PKEY *pkey = NULL;
1598 PACKET save_param_start, signature;
1600 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1602 save_param_start = *pkt;
1604 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1605 EVP_PKEY_free(s->s3->peer_tmp);
1606 s->s3->peer_tmp = NULL;
1609 if (alg_k & SSL_PSK) {
1610 if (!tls_process_ske_psk_preamble(s, pkt, &al))
1614 /* Nothing else to do for plain PSK or RSAPSK */
1615 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1616 } else if (alg_k & SSL_kSRP) {
1617 if (!tls_process_ske_srp(s, pkt, &pkey, &al))
1619 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1620 if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
1622 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1623 if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
1626 al = SSL_AD_UNEXPECTED_MESSAGE;
1627 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1631 /* if it was signed, check the signature */
1635 const EVP_MD *md = NULL;
1639 * |pkt| now points to the beginning of the signature, so the difference
1640 * equals the length of the parameters.
1642 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1643 PACKET_remaining(&save_param_start) -
1644 PACKET_remaining(pkt))) {
1645 al = SSL_AD_INTERNAL_ERROR;
1646 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1650 if (SSL_USE_SIGALGS(s)) {
1651 const unsigned char *sigalgs;
1653 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1654 al = SSL_AD_DECODE_ERROR;
1655 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1658 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1660 al = SSL_AD_INTERNAL_ERROR;
1662 } else if (rv == 0) {
1663 al = SSL_AD_DECODE_ERROR;
1667 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1669 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
1670 md = EVP_md5_sha1();
1675 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1676 || PACKET_remaining(pkt) != 0) {
1677 al = SSL_AD_DECODE_ERROR;
1678 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1681 maxsig = EVP_PKEY_size(pkey);
1683 al = SSL_AD_INTERNAL_ERROR;
1684 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1689 * Check signature length
1691 if (PACKET_remaining(&signature) > (size_t)maxsig) {
1692 /* wrong packet length */
1693 al = SSL_AD_DECODE_ERROR;
1694 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1695 SSL_R_WRONG_SIGNATURE_LENGTH);
1699 md_ctx = EVP_MD_CTX_new();
1700 if (md_ctx == NULL) {
1701 al = SSL_AD_INTERNAL_ERROR;
1702 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1706 if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
1707 || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
1708 SSL3_RANDOM_SIZE) <= 0
1709 || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
1710 SSL3_RANDOM_SIZE) <= 0
1711 || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
1712 PACKET_remaining(¶ms)) <= 0) {
1713 EVP_MD_CTX_free(md_ctx);
1714 al = SSL_AD_INTERNAL_ERROR;
1715 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1718 if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
1719 PACKET_remaining(&signature), pkey) <= 0) {
1721 EVP_MD_CTX_free(md_ctx);
1722 al = SSL_AD_DECRYPT_ERROR;
1723 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1726 EVP_MD_CTX_free(md_ctx);
1728 /* aNULL, aSRP or PSK do not need public keys */
1729 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
1730 && !(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 al = SSL_AD_INTERNAL_ERROR;
1735 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1737 al = SSL_AD_DECODE_ERROR;
1741 /* still data left over */
1742 if (PACKET_remaining(pkt) != 0) {
1743 al = SSL_AD_DECODE_ERROR;
1744 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1749 return MSG_PROCESS_CONTINUE_READING;
1752 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1753 ossl_statem_set_error(s);
1754 return MSG_PROCESS_ERROR;
1757 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
1759 int ret = MSG_PROCESS_ERROR;
1760 unsigned int list_len, ctype_num, i, name_len;
1761 X509_NAME *xn = NULL;
1762 const unsigned char *data;
1763 const unsigned char *namestart, *namebytes;
1764 STACK_OF(X509_NAME) *ca_sk = NULL;
1766 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1767 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1771 /* get the certificate types */
1772 if (!PACKET_get_1(pkt, &ctype_num)
1773 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
1774 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1775 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1778 OPENSSL_free(s->cert->ctypes);
1779 s->cert->ctypes = NULL;
1780 if (ctype_num > SSL3_CT_NUMBER) {
1781 /* If we exceed static buffer copy all to cert structure */
1782 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1783 if (s->cert->ctypes == NULL) {
1784 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1787 memcpy(s->cert->ctypes, data, ctype_num);
1788 s->cert->ctype_num = (size_t)ctype_num;
1789 ctype_num = SSL3_CT_NUMBER;
1791 for (i = 0; i < ctype_num; i++)
1792 s->s3->tmp.ctype[i] = data[i];
1794 if (SSL_USE_SIGALGS(s)) {
1795 if (!PACKET_get_net_2(pkt, &list_len)
1796 || !PACKET_get_bytes(pkt, &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_LENGTH_MISMATCH);
1803 /* Clear certificate digests and validity flags */
1804 for (i = 0; i < SSL_PKEY_NUM; i++) {
1805 s->s3->tmp.md[i] = NULL;
1806 s->s3->tmp.valid_flags[i] = 0;
1808 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1809 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1810 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1811 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1814 if (!tls1_process_sigalgs(s)) {
1815 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1816 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1820 ssl_set_default_md(s);
1823 /* get the CA RDNs */
1824 if (!PACKET_get_net_2(pkt, &list_len)
1825 || PACKET_remaining(pkt) != list_len) {
1826 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1827 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1831 while (PACKET_remaining(pkt)) {
1832 if (!PACKET_get_net_2(pkt, &name_len)
1833 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
1834 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1835 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1836 SSL_R_LENGTH_MISMATCH);
1840 namestart = namebytes;
1842 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
1843 name_len)) == NULL) {
1844 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1845 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1849 if (namebytes != (namestart + name_len)) {
1850 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1851 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1852 SSL_R_CA_DN_LENGTH_MISMATCH);
1855 if (!sk_X509_NAME_push(ca_sk, xn)) {
1856 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1862 /* we should setup a certificate to return.... */
1863 s->s3->tmp.cert_req = 1;
1864 s->s3->tmp.ctype_num = ctype_num;
1865 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1866 s->s3->tmp.ca_names = ca_sk;
1869 ret = MSG_PROCESS_CONTINUE_PROCESSING;
1872 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. We carry on if this fails
1913 SSL_CTX_remove_session(s->session_ctx, s->session);
1916 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1917 al = SSL_AD_INTERNAL_ERROR;
1918 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1922 SSL_SESSION_free(s->session);
1923 s->session = new_sess;
1926 OPENSSL_free(s->session->tlsext_tick);
1927 s->session->tlsext_ticklen = 0;
1929 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1930 if (s->session->tlsext_tick == NULL) {
1931 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1934 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
1935 al = SSL_AD_DECODE_ERROR;
1936 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1940 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
1941 s->session->tlsext_ticklen = ticklen;
1943 * There are two ways to detect a resumed ticket session. One is to set
1944 * an appropriate session ID and then the server must return a match in
1945 * ServerHello. This allows the normal client session ID matching to work
1946 * and we know much earlier that the ticket has been accepted. The
1947 * other way is to set zero length session ID when the ticket is
1948 * presented and rely on the handshake to determine session resumption.
1949 * We choose the former approach because this fits in with assumptions
1950 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1951 * SHA256 is disabled) hash of the ticket.
1953 if (!EVP_Digest(s->session->tlsext_tick, ticklen,
1954 s->session->session_id, &s->session->session_id_length,
1955 EVP_sha256(), NULL)) {
1956 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
1959 return MSG_PROCESS_CONTINUE_READING;
1961 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1963 ossl_statem_set_error(s);
1964 return MSG_PROCESS_ERROR;
1967 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
1970 unsigned long resplen;
1973 if (!PACKET_get_1(pkt, &type)
1974 || type != TLSEXT_STATUSTYPE_ocsp) {
1975 al = SSL_AD_DECODE_ERROR;
1976 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1979 if (!PACKET_get_net_3(pkt, &resplen)
1980 || PACKET_remaining(pkt) != resplen) {
1981 al = SSL_AD_DECODE_ERROR;
1982 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1985 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
1986 if (s->tlsext_ocsp_resp == NULL) {
1987 al = SSL_AD_INTERNAL_ERROR;
1988 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1991 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
1992 al = SSL_AD_DECODE_ERROR;
1993 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1996 s->tlsext_ocsp_resplen = resplen;
1997 return MSG_PROCESS_CONTINUE_READING;
1999 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2000 ossl_statem_set_error(s);
2001 return MSG_PROCESS_ERROR;
2004 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
2006 if (PACKET_remaining(pkt) > 0) {
2007 /* should contain no data */
2008 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2009 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2010 ossl_statem_set_error(s);
2011 return MSG_PROCESS_ERROR;
2013 #ifndef OPENSSL_NO_SRP
2014 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2015 if (SRP_Calc_A_param(s) <= 0) {
2016 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2017 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2018 ossl_statem_set_error(s);
2019 return MSG_PROCESS_ERROR;
2025 * at this point we check that we have the required stuff from
2028 if (!ssl3_check_cert_and_algorithm(s)) {
2029 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2030 ossl_statem_set_error(s);
2031 return MSG_PROCESS_ERROR;
2035 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2036 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2037 * message, or NULL and -1 otherwise
2039 if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
2041 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2043 ssl3_send_alert(s, SSL3_AL_FATAL,
2044 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
2045 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
2046 SSL_R_INVALID_STATUS_RESPONSE);
2047 return MSG_PROCESS_ERROR;
2050 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2051 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
2052 return MSG_PROCESS_ERROR;
2055 #ifndef OPENSSL_NO_CT
2056 if (s->ct_validation_callback != NULL) {
2057 /* Note we validate the SCTs whether or not we abort on error */
2058 if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
2059 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2060 return MSG_PROCESS_ERROR;
2065 #ifndef OPENSSL_NO_SCTP
2066 /* Only applies to renegotiation */
2067 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2068 && s->renegotiate != 0)
2069 return MSG_PROCESS_CONTINUE_PROCESSING;
2072 return MSG_PROCESS_FINISHED_READING;
2075 static int tls_construct_cke_psk_preamble(SSL *s, unsigned char **p,
2076 size_t *pskhdrlen, int *al)
2078 #ifndef OPENSSL_NO_PSK
2081 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2082 * \0-terminated identity. The last byte is for us for simulating
2085 char identity[PSK_MAX_IDENTITY_LEN + 1];
2086 size_t identitylen = 0;
2087 unsigned char psk[PSK_MAX_PSK_LEN];
2088 unsigned char *tmppsk = NULL;
2089 char *tmpidentity = NULL;
2092 if (s->psk_client_callback == NULL) {
2093 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
2094 *al = SSL_AD_INTERNAL_ERROR;
2098 memset(identity, 0, sizeof(identity));
2100 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2101 identity, sizeof(identity) - 1,
2104 if (psklen > PSK_MAX_PSK_LEN) {
2105 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2106 *al = SSL_AD_HANDSHAKE_FAILURE;
2108 } else if (psklen == 0) {
2109 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
2110 SSL_R_PSK_IDENTITY_NOT_FOUND);
2111 *al = SSL_AD_HANDSHAKE_FAILURE;
2115 identitylen = strlen(identity);
2116 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2117 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2118 *al = SSL_AD_HANDSHAKE_FAILURE;
2122 tmppsk = OPENSSL_memdup(psk, psklen);
2123 tmpidentity = OPENSSL_strdup(identity);
2124 if (tmppsk == NULL || tmpidentity == NULL) {
2125 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
2126 *al = SSL_AD_INTERNAL_ERROR;
2130 OPENSSL_free(s->s3->tmp.psk);
2131 s->s3->tmp.psk = tmppsk;
2132 s->s3->tmp.psklen = psklen;
2134 OPENSSL_free(s->session->psk_identity);
2135 s->session->psk_identity = tmpidentity;
2137 s2n(identitylen, *p);
2138 memcpy(*p, identity, identitylen);
2139 *pskhdrlen = 2 + identitylen;
2145 OPENSSL_cleanse(psk, psklen);
2146 OPENSSL_cleanse(identity, sizeof(identity));
2147 OPENSSL_clear_free(tmppsk, psklen);
2148 OPENSSL_clear_free(tmpidentity, identitylen);
2152 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2153 *al = SSL_AD_INTERNAL_ERROR;
2158 static int tls_construct_cke_rsa(SSL *s, unsigned char **p, int *len, int *al)
2160 #ifndef OPENSSL_NO_RSA
2162 EVP_PKEY *pkey = NULL;
2163 EVP_PKEY_CTX *pctx = NULL;
2165 unsigned char *pms = NULL;
2168 if (s->session->peer == NULL) {
2170 * We should always have a server certificate with SSL_kRSA.
2172 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2176 pkey = X509_get0_pubkey(s->session->peer);
2177 if (EVP_PKEY_get0_RSA(pkey) == NULL) {
2178 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2182 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2183 pms = OPENSSL_malloc(pmslen);
2185 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
2186 *al = SSL_AD_INTERNAL_ERROR;
2190 pms[0] = s->client_version >> 8;
2191 pms[1] = s->client_version & 0xff;
2192 if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
2197 /* Fix buf for TLS and beyond */
2198 if (s->version > SSL3_VERSION)
2200 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2201 if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
2202 || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
2203 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
2206 if (EVP_PKEY_encrypt(pctx, *p, &enclen, pms, pmslen) <= 0) {
2207 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
2211 EVP_PKEY_CTX_free(pctx);
2214 if (s->options & SSL_OP_PKCS1_CHECK_1)
2216 if (s->options & SSL_OP_PKCS1_CHECK_2)
2220 /* Fix buf for TLS and beyond */
2221 if (s->version > SSL3_VERSION) {
2226 s->s3->tmp.pms = pms;
2227 s->s3->tmp.pmslen = pmslen;
2231 OPENSSL_clear_free(pms, pmslen);
2232 EVP_PKEY_CTX_free(pctx);
2236 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2237 *al = SSL_AD_INTERNAL_ERROR;
2242 static int tls_construct_cke_dhe(SSL *s, unsigned char **p, int *len, int *al)
2244 #ifndef OPENSSL_NO_DH
2246 const BIGNUM *pub_key;
2247 EVP_PKEY *ckey = NULL, *skey = NULL;
2249 skey = s->s3->peer_tmp;
2251 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2254 ckey = ssl_generate_pkey(skey);
2255 dh_clnt = EVP_PKEY_get0_DH(ckey);
2257 if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) {
2258 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2259 EVP_PKEY_free(ckey);
2263 /* send off the data */
2264 DH_get0_key(dh_clnt, &pub_key, NULL);
2265 *len = BN_num_bytes(pub_key);
2267 BN_bn2bin(pub_key, *p);
2269 EVP_PKEY_free(ckey);
2273 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2274 *al = SSL_AD_INTERNAL_ERROR;
2279 static int tls_construct_cke_ecdhe(SSL *s, unsigned char **p, int *len, int *al)
2281 #ifndef OPENSSL_NO_EC
2282 unsigned char *encodedPoint = NULL;
2283 int encoded_pt_len = 0;
2284 EVP_PKEY *ckey = NULL, *skey = NULL;
2286 skey = s->s3->peer_tmp;
2288 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2292 ckey = ssl_generate_pkey(skey);
2294 if (ssl_derive(s, ckey, skey) == 0) {
2295 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
2299 /* Generate encoding of client key */
2300 encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
2302 if (encoded_pt_len == 0) {
2303 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
2307 EVP_PKEY_free(ckey);
2310 *len = encoded_pt_len;
2312 /* length of encoded point */
2315 /* copy the point */
2316 memcpy(*p, encodedPoint, *len);
2317 /* increment len to account for length field */
2320 OPENSSL_free(encodedPoint);
2324 EVP_PKEY_free(ckey);
2327 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2328 *al = SSL_AD_INTERNAL_ERROR;
2333 static int tls_construct_cke_gost(SSL *s, unsigned char **p, int *len, int *al)
2335 #ifndef OPENSSL_NO_GOST
2336 /* GOST key exchange message creation */
2337 EVP_PKEY_CTX *pkey_ctx = NULL;
2340 unsigned int md_len;
2341 unsigned char shared_ukm[32], tmp[256];
2342 EVP_MD_CTX *ukm_hash = NULL;
2343 int dgst_nid = NID_id_GostR3411_94;
2344 unsigned char *pms = NULL;
2347 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2348 dgst_nid = NID_id_GostR3411_2012_256;
2351 * Get server sertificate PKEY and create ctx from it
2353 peer_cert = s->session->peer;
2355 *al = SSL_AD_HANDSHAKE_FAILURE;
2356 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
2357 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2361 pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
2362 if (pkey_ctx == NULL) {
2363 *al = SSL_AD_INTERNAL_ERROR;
2364 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2368 * If we have send a certificate, and certificate key
2369 * parameters match those of server certificate, use
2370 * certificate key for key exchange
2373 /* Otherwise, generate ephemeral key pair */
2375 pms = OPENSSL_malloc(pmslen);
2377 *al = SSL_AD_INTERNAL_ERROR;
2378 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2382 if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2383 /* Generate session key */
2384 || RAND_bytes(pms, pmslen) <= 0) {
2385 *al = SSL_AD_INTERNAL_ERROR;
2386 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2390 * If we have client certificate, use its secret as peer key
2392 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2393 if (EVP_PKEY_derive_set_peer(pkey_ctx, s->cert->key->privatekey) <= 0) {
2395 * If there was an error - just ignore it. Ephemeral key
2402 * Compute shared IV and store it in algorithm-specific context
2405 ukm_hash = EVP_MD_CTX_new();
2406 if (ukm_hash == NULL
2407 || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0
2408 || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2409 SSL3_RANDOM_SIZE) <= 0
2410 || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2411 SSL3_RANDOM_SIZE) <= 0
2412 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
2413 *al = SSL_AD_INTERNAL_ERROR;
2414 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2417 EVP_MD_CTX_free(ukm_hash);
2419 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
2420 EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
2421 *al = SSL_AD_INTERNAL_ERROR;
2422 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2425 /* Make GOST keytransport blob message */
2427 * Encapsulate it into sequence
2429 *((*p)++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2431 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
2432 *al = SSL_AD_INTERNAL_ERROR;
2433 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2436 if (msglen >= 0x80) {
2438 *((*p)++) = msglen & 0xff;
2441 *((*p)++) = msglen & 0xff;
2444 memcpy(*p, tmp, msglen);
2445 /* Check if pubkey from client certificate was used */
2446 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2,
2448 /* Set flag "skip certificate verify" */
2449 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2451 EVP_PKEY_CTX_free(pkey_ctx);
2452 s->s3->tmp.pms = pms;
2453 s->s3->tmp.pmslen = pmslen;
2457 EVP_PKEY_CTX_free(pkey_ctx);
2458 OPENSSL_clear_free(pms, pmslen);
2459 EVP_MD_CTX_free(ukm_hash);
2462 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2463 *al = SSL_AD_INTERNAL_ERROR;
2468 static int tls_construct_cke_srp(SSL *s, unsigned char **p, int *len, int *al)
2470 #ifndef OPENSSL_NO_SRP
2471 if (s->srp_ctx.A != NULL) {
2472 /* send off the data */
2473 *len = BN_num_bytes(s->srp_ctx.A);
2475 BN_bn2bin(s->srp_ctx.A, *p);
2478 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2481 OPENSSL_free(s->session->srp_username);
2482 s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
2483 if (s->session->srp_username == NULL) {
2484 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE);
2490 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2491 *al = SSL_AD_INTERNAL_ERROR;
2496 int tls_construct_client_key_exchange(SSL *s)
2500 size_t pskhdrlen = 0;
2501 unsigned long alg_k;
2504 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2506 p = ssl_handshake_start(s);
2508 if ((alg_k & SSL_PSK)
2509 && !tls_construct_cke_psk_preamble(s, &p, &pskhdrlen, &al))
2512 if (alg_k & SSL_kPSK) {
2514 } else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2515 if (!tls_construct_cke_rsa(s, &p, &len, &al))
2517 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
2518 if (!tls_construct_cke_dhe(s, &p, &len, &al))
2520 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
2521 if (!tls_construct_cke_ecdhe(s, &p, &len, &al))
2523 } else if (alg_k & SSL_kGOST) {
2524 if (!tls_construct_cke_gost(s, &p, &len, &al))
2526 } else if (alg_k & SSL_kSRP) {
2527 if (!tls_construct_cke_srp(s, &p, &len, &al))
2530 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2531 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2537 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, len)) {
2538 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2539 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2546 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2547 OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
2548 s->s3->tmp.pms = NULL;
2549 #ifndef OPENSSL_NO_PSK
2550 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2551 s->s3->tmp.psk = NULL;
2553 ossl_statem_set_error(s);
2557 int tls_client_key_exchange_post_work(SSL *s)
2559 unsigned char *pms = NULL;
2562 pms = s->s3->tmp.pms;
2563 pmslen = s->s3->tmp.pmslen;
2565 #ifndef OPENSSL_NO_SRP
2567 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2568 if (!srp_generate_client_master_secret(s)) {
2569 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2570 ERR_R_INTERNAL_ERROR);
2577 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2578 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2579 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2582 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2583 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2584 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2585 /* ssl_generate_master_secret frees the pms even on error */
2593 #ifndef OPENSSL_NO_SCTP
2594 if (SSL_IS_DTLS(s)) {
2595 unsigned char sctpauthkey[64];
2596 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2599 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2602 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
2603 sizeof(DTLS1_SCTP_AUTH_LABEL));
2605 if (SSL_export_keying_material(s, sctpauthkey,
2606 sizeof(sctpauthkey), labelbuffer,
2607 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2610 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2611 sizeof(sctpauthkey), sctpauthkey);
2617 OPENSSL_clear_free(pms, pmslen);
2618 s->s3->tmp.pms = NULL;
2622 int tls_construct_client_verify(SSL *s)
2626 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2629 unsigned long n = 0;
2633 mctx = EVP_MD_CTX_new();
2635 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2639 p = ssl_handshake_start(s);
2640 pkey = s->cert->key->privatekey;
2642 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2643 if (hdatalen <= 0) {
2644 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2647 if (SSL_USE_SIGALGS(s)) {
2648 if (!tls12_get_sigandhash(p, pkey, md)) {
2649 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2656 fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
2658 if (!EVP_SignInit_ex(mctx, md, NULL)
2659 || !EVP_SignUpdate(mctx, hdata, hdatalen)
2660 || (s->version == SSL3_VERSION
2661 && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
2662 s->session->master_key_length,
2663 s->session->master_key))
2664 || !EVP_SignFinal(mctx, p + 2, &u, pkey)) {
2665 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
2668 #ifndef OPENSSL_NO_GOST
2670 int pktype = EVP_PKEY_id(pkey);
2671 if (pktype == NID_id_GostR3410_2001
2672 || pktype == NID_id_GostR3410_2012_256
2673 || pktype == NID_id_GostR3410_2012_512)
2674 BUF_reverse(p + 2, NULL, u);
2680 /* Digest cached records and discard handshake buffer */
2681 if (!ssl3_digest_cached_records(s, 0))
2683 if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
2684 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2688 EVP_MD_CTX_free(mctx);
2691 EVP_MD_CTX_free(mctx);
2696 * Check a certificate can be used for client authentication. Currently check
2697 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2698 * certificates can be used and optionally checks suitability for Suite B.
2700 static int ssl3_check_client_certificate(SSL *s)
2702 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
2704 /* If no suitable signature algorithm can't use certificate */
2705 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
2708 * If strict mode check suitability of chain before using it. This also
2709 * adjusts suite B digest if necessary.
2711 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
2712 !tls1_check_chain(s, NULL, NULL, NULL, -2))
2717 WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
2720 EVP_PKEY *pkey = NULL;
2723 if (wst == WORK_MORE_A) {
2724 /* Let cert callback update client certificates if required */
2725 if (s->cert->cert_cb) {
2726 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
2728 s->rwstate = SSL_X509_LOOKUP;
2732 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2733 ossl_statem_set_error(s);
2736 s->rwstate = SSL_NOTHING;
2738 if (ssl3_check_client_certificate(s))
2739 return WORK_FINISHED_CONTINUE;
2741 /* Fall through to WORK_MORE_B */
2745 /* We need to get a client cert */
2746 if (wst == WORK_MORE_B) {
2748 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2749 * return(-1); We then get retied later
2751 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2753 s->rwstate = SSL_X509_LOOKUP;
2756 s->rwstate = SSL_NOTHING;
2757 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2758 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2760 } else if (i == 1) {
2762 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
2763 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2767 EVP_PKEY_free(pkey);
2768 if (i && !ssl3_check_client_certificate(s))
2771 if (s->version == SSL3_VERSION) {
2772 s->s3->tmp.cert_req = 0;
2773 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2774 return WORK_FINISHED_CONTINUE;
2776 s->s3->tmp.cert_req = 2;
2777 if (!ssl3_digest_cached_records(s, 0)) {
2778 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2779 ossl_statem_set_error(s);
2785 return WORK_FINISHED_CONTINUE;
2788 /* Shouldn't ever get here */
2792 int tls_construct_client_certificate(SSL *s)
2794 if (!ssl3_output_cert_chain(s,
2795 (s->s3->tmp.cert_req ==
2796 2) ? NULL : s->cert->key)) {
2797 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
2798 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2799 ossl_statem_set_error(s);
2806 #define has_bits(i,m) (((i)&(m)) == (m))
2808 int ssl3_check_cert_and_algorithm(SSL *s)
2811 #ifndef OPENSSL_NO_EC
2815 EVP_PKEY *pkey = NULL;
2816 int al = SSL_AD_HANDSHAKE_FAILURE;
2818 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2819 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2821 /* we don't have a certificate */
2822 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
2825 /* This is the passed certificate */
2827 #ifndef OPENSSL_NO_EC
2828 idx = s->session->peer_type;
2829 if (idx == SSL_PKEY_ECC) {
2830 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
2832 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2837 } else if (alg_a & SSL_aECDSA) {
2838 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2839 SSL_R_MISSING_ECDSA_SIGNING_CERT);
2843 pkey = X509_get0_pubkey(s->session->peer);
2844 i = X509_certificate_type(s->session->peer, pkey);
2846 /* Check that we have a certificate if we require one */
2847 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2848 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2849 SSL_R_MISSING_RSA_SIGNING_CERT);
2852 #ifndef OPENSSL_NO_DSA
2853 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2854 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2855 SSL_R_MISSING_DSA_SIGNING_CERT);
2859 #ifndef OPENSSL_NO_RSA
2860 if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
2861 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2862 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2863 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2867 #ifndef OPENSSL_NO_DH
2868 if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
2869 al = SSL_AD_INTERNAL_ERROR;
2870 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
2877 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2881 #ifndef OPENSSL_NO_NEXTPROTONEG
2882 int tls_construct_next_proto(SSL *s)
2884 unsigned int len, padding_len;
2887 len = s->next_proto_negotiated_len;
2888 padding_len = 32 - ((len + 2) % 32);
2889 d = (unsigned char *)s->init_buf->data;
2891 memcpy(d + 5, s->next_proto_negotiated, len);
2892 d[5 + len] = padding_len;
2893 memset(d + 6 + len, 0, padding_len);
2894 *(d++) = SSL3_MT_NEXT_PROTO;
2895 l2n3(2 + len + padding_len, d);
2896 s->init_num = 4 + 2 + len + padding_len;
2903 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2906 #ifndef OPENSSL_NO_ENGINE
2907 if (s->ctx->client_cert_engine) {
2908 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2909 SSL_get_client_CA_list(s),
2910 px509, ppkey, NULL, NULL, NULL);
2915 if (s->ctx->client_cert_cb)
2916 i = s->ctx->client_cert_cb(s, px509, ppkey);
2920 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt)
2923 size_t totlen = 0, len, maxlen;
2924 int empty_reneg_info_scsv = !s->renegotiate;
2925 /* Set disabled masks for this session */
2926 ssl_set_client_disabled(s);
2931 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
2932 # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6
2933 # error Max cipher length too short
2936 * Some servers hang if client hello > 256 bytes as hack workaround
2937 * chop number of supported ciphers to keep it well below this if we
2940 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2941 maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
2944 /* Maximum length that can be stored in 2 bytes. Length must be even */
2947 if (empty_reneg_info_scsv)
2949 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
2952 for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) {
2953 const SSL_CIPHER *c;
2955 c = sk_SSL_CIPHER_value(sk, i);
2956 /* Skip disabled ciphers */
2957 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
2960 if (!s->method->put_cipher_by_char(c, pkt, &len)) {
2961 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2969 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE);
2974 if (empty_reneg_info_scsv) {
2975 static SSL_CIPHER scsv = {
2976 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2978 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2979 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2983 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
2984 static SSL_CIPHER scsv = {
2985 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2987 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2988 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);