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 * 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) {
519 /* Shouldn't happen */
522 case TLS_ST_CW_CLNT_HELLO:
523 return tls_construct_client_hello(s);
526 return tls_construct_client_certificate(s);
528 case TLS_ST_CW_KEY_EXCH:
529 return tls_construct_client_key_exchange(s);
531 case TLS_ST_CW_CERT_VRFY:
532 return tls_construct_client_verify(s);
534 case TLS_ST_CW_CHANGE:
536 return dtls_construct_change_cipher_spec(s);
538 return tls_construct_change_cipher_spec(s);
540 #if !defined(OPENSSL_NO_NEXTPROTONEG)
541 case TLS_ST_CW_NEXT_PROTO:
542 return tls_construct_next_proto(s);
544 case TLS_ST_CW_FINISHED:
545 return tls_construct_finished(s,
547 ssl3_enc->client_finished_label,
549 ssl3_enc->client_finished_label_len);
554 * Returns the maximum allowed length for the current message that we are
555 * reading. Excludes the message header.
557 unsigned long ossl_statem_client_max_message_size(SSL *s)
559 OSSL_STATEM *st = &s->statem;
561 switch (st->hand_state) {
563 /* Shouldn't happen */
566 case TLS_ST_CR_SRVR_HELLO:
567 return SERVER_HELLO_MAX_LENGTH;
569 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
570 return HELLO_VERIFY_REQUEST_MAX_LENGTH;
573 return s->max_cert_list;
575 case TLS_ST_CR_CERT_STATUS:
576 return SSL3_RT_MAX_PLAIN_LENGTH;
578 case TLS_ST_CR_KEY_EXCH:
579 return SERVER_KEY_EXCH_MAX_LENGTH;
581 case TLS_ST_CR_CERT_REQ:
583 * Set to s->max_cert_list for compatibility with previous releases. In
584 * practice these messages can get quite long if servers are configured
585 * to provide a long list of acceptable CAs
587 return s->max_cert_list;
589 case TLS_ST_CR_SRVR_DONE:
590 return SERVER_HELLO_DONE_MAX_LENGTH;
592 case TLS_ST_CR_CHANGE:
593 if (s->version == DTLS1_BAD_VER)
595 return CCS_MAX_LENGTH;
597 case TLS_ST_CR_SESSION_TICKET:
598 return SSL3_RT_MAX_PLAIN_LENGTH;
600 case TLS_ST_CR_FINISHED:
601 return FINISHED_MAX_LENGTH;
606 * Process a message that the client has been received from the server.
608 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
610 OSSL_STATEM *st = &s->statem;
612 switch (st->hand_state) {
614 /* Shouldn't happen */
615 return MSG_PROCESS_ERROR;
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);
650 * Perform any further processing required following the receipt of a message
653 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
655 OSSL_STATEM *st = &s->statem;
657 switch (st->hand_state) {
659 /* Shouldn't happen */
662 case TLS_ST_CR_CERT_REQ:
663 return tls_prepare_client_certificate(s, wst);
665 #ifndef OPENSSL_NO_SCTP
666 case TLS_ST_CR_SRVR_DONE:
667 /* We only get here if we are using SCTP and we are renegotiating */
668 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
669 s->s3->in_read_app_data = 2;
670 s->rwstate = SSL_READING;
671 BIO_clear_retry_flags(SSL_get_rbio(s));
672 BIO_set_retry_read(SSL_get_rbio(s));
673 ossl_statem_set_sctp_read_sock(s, 1);
676 ossl_statem_set_sctp_read_sock(s, 0);
677 return WORK_FINISHED_STOP;
682 int tls_construct_client_hello(SSL *s)
687 int al = SSL_AD_HANDSHAKE_FAILURE;
688 #ifndef OPENSSL_NO_COMP
691 SSL_SESSION *sess = s->session;
694 if (!WPACKET_init(&pkt, s->init_buf)
695 || !WPACKET_set_max_size(&pkt, SSL3_RT_MAX_PLAIN_LENGTH)) {
696 /* Should not happen */
697 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
701 /* Work out what SSL/TLS/DTLS version to use */
702 protverr = ssl_set_client_hello_version(s);
704 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
708 if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) ||
710 * In the case of EAP-FAST, we can have a pre-shared
711 * "ticket" without a session ID.
713 (!sess->session_id_length && !sess->tlsext_tick) ||
714 (sess->not_resumable)) {
715 if (!ssl_get_new_session(s, 0))
718 /* else use the pre-loaded session */
720 p = s->s3->client_random;
723 * for DTLS if client_random is initialized, reuse it, we are
724 * required to use same upon reply to HelloVerify
726 if (SSL_IS_DTLS(s)) {
729 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
738 if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0)
741 if (!ssl_set_handshake_header2(s, &pkt, SSL3_MT_CLIENT_HELLO)) {
742 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
743 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
748 * version indicates the negotiated version: for example from
749 * an SSLv2/v3 compatible client hello). The client_version
750 * field is the maximum version we permit and it is also
751 * used in RSA encrypted premaster secrets. Some servers can
752 * choke if we initially report a higher version then
753 * renegotiate to a lower one in the premaster secret. This
754 * didn't happen with TLS 1.0 as most servers supported it
755 * but it can with TLS 1.1 or later if the server only supports
758 * Possible scenario with previous logic:
759 * 1. Client hello indicates TLS 1.2
760 * 2. Server hello says TLS 1.0
761 * 3. RSA encrypted premaster secret uses 1.2.
762 * 4. Handshake proceeds using TLS 1.0.
763 * 5. Server sends hello request to renegotiate.
764 * 6. Client hello indicates TLS v1.0 as we now
765 * know that is maximum server supports.
766 * 7. Server chokes on RSA encrypted premaster secret
767 * containing version 1.0.
769 * For interoperability it should be OK to always use the
770 * maximum version we support in client hello and then rely
771 * on the checking of version to ensure the servers isn't
772 * being inconsistent: for example initially negotiating with
773 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
774 * client_version in client hello and not resetting it to
775 * the negotiated version.
777 if (!WPACKET_put_bytes_u16(&pkt, s->client_version)
778 || !WPACKET_memcpy(&pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) {
779 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
787 i = s->session->session_id_length;
788 if (i > (int)sizeof(s->session->session_id)
789 || !WPACKET_start_sub_packet_u8(&pkt)
790 || (i != 0 && !WPACKET_memcpy(&pkt, s->session->session_id, i))
791 || !WPACKET_close(&pkt)) {
792 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
796 /* cookie stuff for DTLS */
797 if (SSL_IS_DTLS(s)) {
798 if (s->d1->cookie_len > sizeof(s->d1->cookie)
799 || !WPACKET_sub_memcpy_u8(&pkt, s->d1->cookie,
800 s->d1->cookie_len)) {
801 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
806 /* Ciphers supported */
807 if (!WPACKET_start_sub_packet_u16(&pkt)) {
808 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
811 /* ssl_cipher_list_to_bytes() raises SSLerr if appropriate */
812 if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &pkt))
814 if (!WPACKET_close(&pkt)) {
815 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
820 if (!WPACKET_start_sub_packet_u8(&pkt)) {
821 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
824 #ifndef OPENSSL_NO_COMP
825 if (ssl_allow_compression(s) && s->ctx->comp_methods) {
826 int compnum = sk_SSL_COMP_num(s->ctx->comp_methods);
827 for (i = 0; i < compnum; i++) {
828 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
829 if (!WPACKET_put_bytes_u8(&pkt, comp->id)) {
830 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
836 /* Add the NULL method */
837 if (!WPACKET_put_bytes_u8(&pkt, 0) || !WPACKET_close(&pkt)) {
838 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
843 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
844 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
847 if (!WPACKET_start_sub_packet_u16(&pkt)
849 * If extensions are of zero length then we don't even add the
850 * extensions length bytes
852 || !WPACKET_set_flags(&pkt, WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH)
853 || !ssl_add_clienthello_tlsext(s, &pkt, &al)
854 || !WPACKET_close(&pkt)) {
855 ssl3_send_alert(s, SSL3_AL_FATAL, al);
856 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
860 if (!ssl_close_construct_packet(s, &pkt)) {
861 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
862 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
868 ossl_statem_set_error(s);
869 WPACKET_cleanup(&pkt);
873 MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
876 unsigned int cookie_len;
879 if (!PACKET_forward(pkt, 2)
880 || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
881 al = SSL_AD_DECODE_ERROR;
882 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
886 cookie_len = PACKET_remaining(&cookiepkt);
887 if (cookie_len > sizeof(s->d1->cookie)) {
888 al = SSL_AD_ILLEGAL_PARAMETER;
889 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
893 if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
894 al = SSL_AD_DECODE_ERROR;
895 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
898 s->d1->cookie_len = cookie_len;
900 return MSG_PROCESS_FINISHED_READING;
902 ssl3_send_alert(s, SSL3_AL_FATAL, al);
903 ossl_statem_set_error(s);
904 return MSG_PROCESS_ERROR;
907 MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
909 STACK_OF(SSL_CIPHER) *sk;
912 size_t session_id_len;
913 const unsigned char *cipherchars;
914 int i, al = SSL_AD_INTERNAL_ERROR;
915 unsigned int compression;
916 unsigned int sversion;
918 #ifndef OPENSSL_NO_COMP
922 if (!PACKET_get_net_2(pkt, &sversion)) {
923 al = SSL_AD_DECODE_ERROR;
924 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
928 protverr = ssl_choose_client_version(s, sversion);
930 al = SSL_AD_PROTOCOL_VERSION;
931 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
935 /* load the server hello data */
936 /* load the server random */
937 if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
938 al = SSL_AD_DECODE_ERROR;
939 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
945 /* Get the session-id. */
946 if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
947 al = SSL_AD_DECODE_ERROR;
948 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
951 session_id_len = PACKET_remaining(&session_id);
952 if (session_id_len > sizeof s->session->session_id
953 || session_id_len > SSL3_SESSION_ID_SIZE) {
954 al = SSL_AD_ILLEGAL_PARAMETER;
955 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
959 if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
960 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
961 al = SSL_AD_DECODE_ERROR;
966 * Check if we can resume the session based on external pre-shared secret.
967 * EAP-FAST (RFC 4851) supports two types of session resumption.
968 * Resumption based on server-side state works with session IDs.
969 * Resumption based on pre-shared Protected Access Credentials (PACs)
970 * works by overriding the SessionTicket extension at the application
971 * layer, and does not send a session ID. (We do not know whether EAP-FAST
972 * servers would honour the session ID.) Therefore, the session ID alone
973 * is not a reliable indicator of session resumption, so we first check if
974 * we can resume, and later peek at the next handshake message to see if the
975 * server wants to resume.
977 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
978 s->session->tlsext_tick) {
979 const SSL_CIPHER *pref_cipher = NULL;
980 s->session->master_key_length = sizeof(s->session->master_key);
981 if (s->tls_session_secret_cb(s, s->session->master_key,
982 &s->session->master_key_length,
984 s->tls_session_secret_cb_arg)) {
985 s->session->cipher = pref_cipher ?
986 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
988 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
989 al = SSL_AD_INTERNAL_ERROR;
994 if (session_id_len != 0 && session_id_len == s->session->session_id_length
995 && memcmp(PACKET_data(&session_id), s->session->session_id,
996 session_id_len) == 0) {
997 if (s->sid_ctx_length != s->session->sid_ctx_length
998 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
999 /* actually a client application bug */
1000 al = SSL_AD_ILLEGAL_PARAMETER;
1001 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1002 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1008 * If we were trying for session-id reuse but the server
1009 * didn't echo the ID, make a new SSL_SESSION.
1010 * In the case of EAP-FAST and PAC, we do not send a session ID,
1011 * so the PAC-based session secret is always preserved. It'll be
1012 * overwritten if the server refuses resumption.
1014 if (s->session->session_id_length > 0) {
1015 s->ctx->stats.sess_miss++;
1016 if (!ssl_get_new_session(s, 0)) {
1021 s->session->ssl_version = s->version;
1022 s->session->session_id_length = session_id_len;
1023 /* session_id_len could be 0 */
1024 memcpy(s->session->session_id, PACKET_data(&session_id),
1028 /* Session version and negotiated protocol version should match */
1029 if (s->version != s->session->ssl_version) {
1030 al = SSL_AD_PROTOCOL_VERSION;
1032 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1033 SSL_R_SSL_SESSION_VERSION_MISMATCH);
1037 c = ssl_get_cipher_by_char(s, cipherchars);
1039 /* unknown cipher */
1040 al = SSL_AD_ILLEGAL_PARAMETER;
1041 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1045 * Now that we know the version, update the check to see if it's an allowed
1048 s->s3->tmp.min_ver = s->version;
1049 s->s3->tmp.max_ver = s->version;
1051 * If it is a disabled cipher we either didn't send it in client hello,
1052 * or it's not allowed for the selected protocol. So we return an error.
1054 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1055 al = SSL_AD_ILLEGAL_PARAMETER;
1056 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1060 sk = ssl_get_ciphers_by_id(s);
1061 i = sk_SSL_CIPHER_find(sk, c);
1063 /* we did not say we would use this cipher */
1064 al = SSL_AD_ILLEGAL_PARAMETER;
1065 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1070 * Depending on the session caching (internal/external), the cipher
1071 * and/or cipher_id values may not be set. Make sure that cipher_id is
1072 * set and use it for comparison.
1074 if (s->session->cipher)
1075 s->session->cipher_id = s->session->cipher->id;
1076 if (s->hit && (s->session->cipher_id != c->id)) {
1077 al = SSL_AD_ILLEGAL_PARAMETER;
1078 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1079 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1082 s->s3->tmp.new_cipher = c;
1083 /* lets get the compression algorithm */
1085 if (!PACKET_get_1(pkt, &compression)) {
1086 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1087 al = SSL_AD_DECODE_ERROR;
1090 #ifdef OPENSSL_NO_COMP
1091 if (compression != 0) {
1092 al = SSL_AD_ILLEGAL_PARAMETER;
1093 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1094 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1098 * If compression is disabled we'd better not try to resume a session
1099 * using compression.
1101 if (s->session->compress_meth != 0) {
1102 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1106 if (s->hit && compression != s->session->compress_meth) {
1107 al = SSL_AD_ILLEGAL_PARAMETER;
1108 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1109 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1112 if (compression == 0)
1114 else if (!ssl_allow_compression(s)) {
1115 al = SSL_AD_ILLEGAL_PARAMETER;
1116 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1119 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1122 if (compression != 0 && comp == NULL) {
1123 al = SSL_AD_ILLEGAL_PARAMETER;
1124 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1125 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1128 s->s3->tmp.new_compression = comp;
1132 /* TLS extensions */
1133 if (!ssl_parse_serverhello_tlsext(s, pkt)) {
1134 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1138 if (PACKET_remaining(pkt) != 0) {
1139 /* wrong packet length */
1140 al = SSL_AD_DECODE_ERROR;
1141 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1144 #ifndef OPENSSL_NO_SCTP
1145 if (SSL_IS_DTLS(s) && s->hit) {
1146 unsigned char sctpauthkey[64];
1147 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
1150 * Add new shared key for SCTP-Auth, will be ignored if
1153 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
1154 sizeof(DTLS1_SCTP_AUTH_LABEL));
1156 if (SSL_export_keying_material(s, sctpauthkey,
1157 sizeof(sctpauthkey),
1159 sizeof(labelbuffer), NULL, 0, 0) <= 0)
1162 BIO_ctrl(SSL_get_wbio(s),
1163 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
1164 sizeof(sctpauthkey), sctpauthkey);
1168 return MSG_PROCESS_CONTINUE_READING;
1170 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1172 ossl_statem_set_error(s);
1173 return MSG_PROCESS_ERROR;
1176 MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
1178 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
1179 unsigned long cert_list_len, cert_len;
1181 const unsigned char *certstart, *certbytes;
1182 STACK_OF(X509) *sk = NULL;
1183 EVP_PKEY *pkey = NULL;
1185 if ((sk = sk_X509_new_null()) == NULL) {
1186 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1190 if (!PACKET_get_net_3(pkt, &cert_list_len)
1191 || PACKET_remaining(pkt) != cert_list_len) {
1192 al = SSL_AD_DECODE_ERROR;
1193 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1196 while (PACKET_remaining(pkt)) {
1197 if (!PACKET_get_net_3(pkt, &cert_len)
1198 || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
1199 al = SSL_AD_DECODE_ERROR;
1200 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1201 SSL_R_CERT_LENGTH_MISMATCH);
1205 certstart = certbytes;
1206 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1208 al = SSL_AD_BAD_CERTIFICATE;
1209 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1212 if (certbytes != (certstart + cert_len)) {
1213 al = SSL_AD_DECODE_ERROR;
1214 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1215 SSL_R_CERT_LENGTH_MISMATCH);
1218 if (!sk_X509_push(sk, x)) {
1219 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1225 i = ssl_verify_cert_chain(s, sk);
1226 if ((s->verify_mode & SSL_VERIFY_PEER) && i <= 0) {
1227 al = ssl_verify_alarm_type(s->verify_result);
1228 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1229 SSL_R_CERTIFICATE_VERIFY_FAILED);
1232 ERR_clear_error(); /* but we keep s->verify_result */
1234 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
1235 al = SSL_AD_HANDSHAKE_FAILURE;
1239 s->session->peer_chain = sk;
1241 * Inconsistency alert: cert_chain does include the peer's certificate,
1242 * which we don't include in statem_srvr.c
1244 x = sk_X509_value(sk, 0);
1247 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1250 pkey = X509_get0_pubkey(x);
1252 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1255 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1256 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1260 i = ssl_cert_type(x, pkey);
1264 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1265 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1269 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1270 if (exp_idx >= 0 && i != exp_idx
1271 && (exp_idx != SSL_PKEY_GOST_EC ||
1272 (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
1273 && i != SSL_PKEY_GOST01))) {
1275 al = SSL_AD_ILLEGAL_PARAMETER;
1276 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1277 SSL_R_WRONG_CERTIFICATE_TYPE);
1280 s->session->peer_type = i;
1282 X509_free(s->session->peer);
1284 s->session->peer = x;
1285 s->session->verify_result = s->verify_result;
1288 ret = MSG_PROCESS_CONTINUE_READING;
1292 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1294 ossl_statem_set_error(s);
1297 sk_X509_pop_free(sk, X509_free);
1301 static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al)
1303 #ifndef OPENSSL_NO_PSK
1304 PACKET psk_identity_hint;
1306 /* PSK ciphersuites are preceded by an identity hint */
1308 if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
1309 *al = SSL_AD_DECODE_ERROR;
1310 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH);
1315 * Store PSK identity hint for later use, hint is used in
1316 * tls_construct_client_key_exchange. Assume that the maximum length of
1317 * a PSK identity hint can be as long as the maximum length of a PSK
1320 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1321 *al = SSL_AD_HANDSHAKE_FAILURE;
1322 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG);
1326 if (PACKET_remaining(&psk_identity_hint) == 0) {
1327 OPENSSL_free(s->session->psk_identity_hint);
1328 s->session->psk_identity_hint = NULL;
1329 } else if (!PACKET_strndup(&psk_identity_hint,
1330 &s->session->psk_identity_hint)) {
1331 *al = SSL_AD_INTERNAL_ERROR;
1337 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
1338 *al = SSL_AD_INTERNAL_ERROR;
1343 static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1345 #ifndef OPENSSL_NO_SRP
1346 PACKET prime, generator, salt, server_pub;
1348 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1349 || !PACKET_get_length_prefixed_2(pkt, &generator)
1350 || !PACKET_get_length_prefixed_1(pkt, &salt)
1351 || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
1352 *al = SSL_AD_DECODE_ERROR;
1353 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH);
1358 BN_bin2bn(PACKET_data(&prime),
1359 PACKET_remaining(&prime), NULL)) == NULL
1361 BN_bin2bn(PACKET_data(&generator),
1362 PACKET_remaining(&generator), NULL)) == NULL
1364 BN_bin2bn(PACKET_data(&salt),
1365 PACKET_remaining(&salt), NULL)) == NULL
1367 BN_bin2bn(PACKET_data(&server_pub),
1368 PACKET_remaining(&server_pub), NULL)) == NULL) {
1369 *al = SSL_AD_INTERNAL_ERROR;
1370 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
1374 if (!srp_verify_server_param(s, al)) {
1375 *al = SSL_AD_DECODE_ERROR;
1376 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
1380 /* We must check if there is a certificate */
1381 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1382 *pkey = X509_get0_pubkey(s->session->peer);
1386 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
1387 *al = SSL_AD_INTERNAL_ERROR;
1392 static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1394 #ifndef OPENSSL_NO_DH
1395 PACKET prime, generator, pub_key;
1396 EVP_PKEY *peer_tmp = NULL;
1399 BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
1401 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1402 || !PACKET_get_length_prefixed_2(pkt, &generator)
1403 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1404 *al = SSL_AD_DECODE_ERROR;
1405 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
1409 peer_tmp = EVP_PKEY_new();
1412 if (peer_tmp == NULL || dh == NULL) {
1413 *al = SSL_AD_INTERNAL_ERROR;
1414 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
1418 p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
1419 g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), NULL);
1420 bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
1422 if (p == NULL || g == NULL || bnpub_key == NULL) {
1423 *al = SSL_AD_INTERNAL_ERROR;
1424 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1428 if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) {
1429 *al = SSL_AD_DECODE_ERROR;
1430 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
1434 if (!DH_set0_pqg(dh, p, NULL, g)) {
1435 *al = SSL_AD_INTERNAL_ERROR;
1436 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1441 if (!DH_set0_key(dh, bnpub_key, NULL)) {
1442 *al = SSL_AD_INTERNAL_ERROR;
1443 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1448 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1449 *al = SSL_AD_HANDSHAKE_FAILURE;
1450 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
1454 if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
1455 *al = SSL_AD_INTERNAL_ERROR;
1456 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
1460 s->s3->peer_tmp = peer_tmp;
1463 * FIXME: This makes assumptions about which ciphersuites come with
1464 * public keys. We should have a less ad-hoc way of doing this
1466 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
1467 *pkey = X509_get0_pubkey(s->session->peer);
1468 /* else anonymous DH, so no certificate or pkey. */
1477 EVP_PKEY_free(peer_tmp);
1481 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
1482 *al = SSL_AD_INTERNAL_ERROR;
1487 static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1489 #ifndef OPENSSL_NO_EC
1491 const unsigned char *ecparams;
1493 unsigned int curve_flags;
1494 EVP_PKEY_CTX *pctx = NULL;
1497 * Extract elliptic curve parameters and the server's ephemeral ECDH
1498 * public key. For now we only support named (not generic) curves and
1499 * ECParameters in this case is just three bytes.
1501 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1502 *al = SSL_AD_DECODE_ERROR;
1503 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
1507 * Check curve is one of our preferences, if not server has sent an
1508 * invalid curve. ECParameters is 3 bytes.
1510 if (!tls1_check_curve(s, ecparams, 3)) {
1511 *al = SSL_AD_DECODE_ERROR;
1512 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
1516 curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
1518 if (curve_nid == 0) {
1519 *al = SSL_AD_INTERNAL_ERROR;
1520 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
1521 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1525 if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
1526 EVP_PKEY *key = EVP_PKEY_new();
1528 if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
1529 *al = SSL_AD_INTERNAL_ERROR;
1530 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1534 s->s3->peer_tmp = key;
1536 /* Set up EVP_PKEY with named curve as parameters */
1537 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
1539 || EVP_PKEY_paramgen_init(pctx) <= 0
1540 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
1541 || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
1542 *al = SSL_AD_INTERNAL_ERROR;
1543 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1544 EVP_PKEY_CTX_free(pctx);
1547 EVP_PKEY_CTX_free(pctx);
1551 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1552 *al = SSL_AD_DECODE_ERROR;
1553 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
1557 if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
1558 PACKET_data(&encoded_pt),
1559 PACKET_remaining(&encoded_pt))) {
1560 *al = SSL_AD_DECODE_ERROR;
1561 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
1566 * The ECC/TLS specification does not mention the use of DSA to sign
1567 * ECParameters in the server key exchange message. We do support RSA
1570 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
1571 *pkey = X509_get0_pubkey(s->session->peer);
1572 else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
1573 *pkey = X509_get0_pubkey(s->session->peer);
1574 /* else anonymous ECDH, so no certificate or pkey. */
1578 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
1579 *al = SSL_AD_INTERNAL_ERROR;
1584 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1588 EVP_PKEY *pkey = NULL;
1589 PACKET save_param_start, signature;
1591 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1593 save_param_start = *pkt;
1595 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1596 EVP_PKEY_free(s->s3->peer_tmp);
1597 s->s3->peer_tmp = NULL;
1600 if (alg_k & SSL_PSK) {
1601 if (!tls_process_ske_psk_preamble(s, pkt, &al))
1605 /* Nothing else to do for plain PSK or RSAPSK */
1606 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1607 } else if (alg_k & SSL_kSRP) {
1608 if (!tls_process_ske_srp(s, pkt, &pkey, &al))
1610 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1611 if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
1613 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1614 if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
1617 al = SSL_AD_UNEXPECTED_MESSAGE;
1618 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1622 /* if it was signed, check the signature */
1626 const EVP_MD *md = NULL;
1630 * |pkt| now points to the beginning of the signature, so the difference
1631 * equals the length of the parameters.
1633 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1634 PACKET_remaining(&save_param_start) -
1635 PACKET_remaining(pkt))) {
1636 al = SSL_AD_INTERNAL_ERROR;
1637 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1641 if (SSL_USE_SIGALGS(s)) {
1642 const unsigned char *sigalgs;
1644 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1645 al = SSL_AD_DECODE_ERROR;
1646 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1649 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1651 al = SSL_AD_INTERNAL_ERROR;
1653 } else if (rv == 0) {
1654 al = SSL_AD_DECODE_ERROR;
1658 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1660 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
1661 md = EVP_md5_sha1();
1666 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1667 || PACKET_remaining(pkt) != 0) {
1668 al = SSL_AD_DECODE_ERROR;
1669 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1672 maxsig = EVP_PKEY_size(pkey);
1674 al = SSL_AD_INTERNAL_ERROR;
1675 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1680 * Check signature length
1682 if (PACKET_remaining(&signature) > (size_t)maxsig) {
1683 /* wrong packet length */
1684 al = SSL_AD_DECODE_ERROR;
1685 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
1686 SSL_R_WRONG_SIGNATURE_LENGTH);
1690 md_ctx = EVP_MD_CTX_new();
1691 if (md_ctx == NULL) {
1692 al = SSL_AD_INTERNAL_ERROR;
1693 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1697 if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
1698 || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
1699 SSL3_RANDOM_SIZE) <= 0
1700 || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
1701 SSL3_RANDOM_SIZE) <= 0
1702 || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
1703 PACKET_remaining(¶ms)) <= 0) {
1704 EVP_MD_CTX_free(md_ctx);
1705 al = SSL_AD_INTERNAL_ERROR;
1706 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1709 if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
1710 PACKET_remaining(&signature), pkey) <= 0) {
1712 EVP_MD_CTX_free(md_ctx);
1713 al = SSL_AD_DECRYPT_ERROR;
1714 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1717 EVP_MD_CTX_free(md_ctx);
1719 /* aNULL, aSRP or PSK do not need public keys */
1720 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
1721 && !(alg_k & SSL_PSK)) {
1722 /* Might be wrong key type, check it */
1723 if (ssl3_check_cert_and_algorithm(s)) {
1724 /* Otherwise this shouldn't happen */
1725 al = SSL_AD_INTERNAL_ERROR;
1726 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1728 al = SSL_AD_DECODE_ERROR;
1732 /* still data left over */
1733 if (PACKET_remaining(pkt) != 0) {
1734 al = SSL_AD_DECODE_ERROR;
1735 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1740 return MSG_PROCESS_CONTINUE_READING;
1743 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1744 ossl_statem_set_error(s);
1745 return MSG_PROCESS_ERROR;
1748 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
1750 int ret = MSG_PROCESS_ERROR;
1751 unsigned int list_len, ctype_num, i, name_len;
1752 X509_NAME *xn = NULL;
1753 const unsigned char *data;
1754 const unsigned char *namestart, *namebytes;
1755 STACK_OF(X509_NAME) *ca_sk = NULL;
1757 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1758 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1762 /* get the certificate types */
1763 if (!PACKET_get_1(pkt, &ctype_num)
1764 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
1765 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1766 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1769 OPENSSL_free(s->cert->ctypes);
1770 s->cert->ctypes = NULL;
1771 if (ctype_num > SSL3_CT_NUMBER) {
1772 /* If we exceed static buffer copy all to cert structure */
1773 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1774 if (s->cert->ctypes == NULL) {
1775 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1778 memcpy(s->cert->ctypes, data, ctype_num);
1779 s->cert->ctype_num = (size_t)ctype_num;
1780 ctype_num = SSL3_CT_NUMBER;
1782 for (i = 0; i < ctype_num; i++)
1783 s->s3->tmp.ctype[i] = data[i];
1785 if (SSL_USE_SIGALGS(s)) {
1786 if (!PACKET_get_net_2(pkt, &list_len)
1787 || !PACKET_get_bytes(pkt, &data, list_len)) {
1788 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1789 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1790 SSL_R_LENGTH_MISMATCH);
1794 /* Clear certificate digests and validity flags */
1795 for (i = 0; i < SSL_PKEY_NUM; i++) {
1796 s->s3->tmp.md[i] = NULL;
1797 s->s3->tmp.valid_flags[i] = 0;
1799 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1800 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1801 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1802 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1805 if (!tls1_process_sigalgs(s)) {
1806 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1807 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1811 ssl_set_default_md(s);
1814 /* get the CA RDNs */
1815 if (!PACKET_get_net_2(pkt, &list_len)
1816 || PACKET_remaining(pkt) != list_len) {
1817 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1818 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1822 while (PACKET_remaining(pkt)) {
1823 if (!PACKET_get_net_2(pkt, &name_len)
1824 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
1825 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1826 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1827 SSL_R_LENGTH_MISMATCH);
1831 namestart = namebytes;
1833 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
1834 name_len)) == NULL) {
1835 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1836 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1840 if (namebytes != (namestart + name_len)) {
1841 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1842 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1843 SSL_R_CA_DN_LENGTH_MISMATCH);
1846 if (!sk_X509_NAME_push(ca_sk, xn)) {
1847 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1853 /* we should setup a certificate to return.... */
1854 s->s3->tmp.cert_req = 1;
1855 s->s3->tmp.ctype_num = ctype_num;
1856 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1857 s->s3->tmp.ca_names = ca_sk;
1860 ret = MSG_PROCESS_CONTINUE_PROCESSING;
1863 ossl_statem_set_error(s);
1866 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1870 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
1872 return (X509_NAME_cmp(*a, *b));
1875 MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
1878 unsigned int ticklen;
1879 unsigned long ticket_lifetime_hint;
1881 if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
1882 || !PACKET_get_net_2(pkt, &ticklen)
1883 || PACKET_remaining(pkt) != ticklen) {
1884 al = SSL_AD_DECODE_ERROR;
1885 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1889 /* Server is allowed to change its mind and send an empty ticket. */
1891 return MSG_PROCESS_CONTINUE_READING;
1893 if (s->session->session_id_length > 0) {
1894 int i = s->session_ctx->session_cache_mode;
1895 SSL_SESSION *new_sess;
1897 * We reused an existing session, so we need to replace it with a new
1900 if (i & SSL_SESS_CACHE_CLIENT) {
1902 * Remove the old session from the cache. We carry on if this fails
1904 SSL_CTX_remove_session(s->session_ctx, s->session);
1907 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1908 al = SSL_AD_INTERNAL_ERROR;
1909 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1913 SSL_SESSION_free(s->session);
1914 s->session = new_sess;
1917 OPENSSL_free(s->session->tlsext_tick);
1918 s->session->tlsext_ticklen = 0;
1920 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1921 if (s->session->tlsext_tick == NULL) {
1922 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1925 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
1926 al = SSL_AD_DECODE_ERROR;
1927 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1931 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
1932 s->session->tlsext_ticklen = ticklen;
1934 * There are two ways to detect a resumed ticket session. One is to set
1935 * an appropriate session ID and then the server must return a match in
1936 * ServerHello. This allows the normal client session ID matching to work
1937 * and we know much earlier that the ticket has been accepted. The
1938 * other way is to set zero length session ID when the ticket is
1939 * presented and rely on the handshake to determine session resumption.
1940 * We choose the former approach because this fits in with assumptions
1941 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1942 * SHA256 is disabled) hash of the ticket.
1944 if (!EVP_Digest(s->session->tlsext_tick, ticklen,
1945 s->session->session_id, &s->session->session_id_length,
1946 EVP_sha256(), NULL)) {
1947 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
1950 return MSG_PROCESS_CONTINUE_READING;
1952 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1954 ossl_statem_set_error(s);
1955 return MSG_PROCESS_ERROR;
1958 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
1961 unsigned long resplen;
1964 if (!PACKET_get_1(pkt, &type)
1965 || type != TLSEXT_STATUSTYPE_ocsp) {
1966 al = SSL_AD_DECODE_ERROR;
1967 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1970 if (!PACKET_get_net_3(pkt, &resplen)
1971 || PACKET_remaining(pkt) != resplen) {
1972 al = SSL_AD_DECODE_ERROR;
1973 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1976 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
1977 if (s->tlsext_ocsp_resp == NULL) {
1978 al = SSL_AD_INTERNAL_ERROR;
1979 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1982 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
1983 al = SSL_AD_DECODE_ERROR;
1984 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1987 s->tlsext_ocsp_resplen = resplen;
1988 return MSG_PROCESS_CONTINUE_READING;
1990 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1991 ossl_statem_set_error(s);
1992 return MSG_PROCESS_ERROR;
1995 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
1997 if (PACKET_remaining(pkt) > 0) {
1998 /* should contain no data */
1999 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2000 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2001 ossl_statem_set_error(s);
2002 return MSG_PROCESS_ERROR;
2004 #ifndef OPENSSL_NO_SRP
2005 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2006 if (SRP_Calc_A_param(s) <= 0) {
2007 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2008 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2009 ossl_statem_set_error(s);
2010 return MSG_PROCESS_ERROR;
2016 * at this point we check that we have the required stuff from
2019 if (!ssl3_check_cert_and_algorithm(s)) {
2020 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2021 ossl_statem_set_error(s);
2022 return MSG_PROCESS_ERROR;
2026 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2027 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2028 * message, or NULL and -1 otherwise
2030 if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
2032 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2034 ssl3_send_alert(s, SSL3_AL_FATAL,
2035 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
2036 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
2037 SSL_R_INVALID_STATUS_RESPONSE);
2038 return MSG_PROCESS_ERROR;
2041 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2042 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
2043 return MSG_PROCESS_ERROR;
2046 #ifndef OPENSSL_NO_CT
2047 if (s->ct_validation_callback != NULL) {
2048 /* Note we validate the SCTs whether or not we abort on error */
2049 if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
2050 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2051 return MSG_PROCESS_ERROR;
2056 #ifndef OPENSSL_NO_SCTP
2057 /* Only applies to renegotiation */
2058 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2059 && s->renegotiate != 0)
2060 return MSG_PROCESS_CONTINUE_PROCESSING;
2063 return MSG_PROCESS_FINISHED_READING;
2066 static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al)
2068 #ifndef OPENSSL_NO_PSK
2071 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2072 * \0-terminated identity. The last byte is for us for simulating
2075 char identity[PSK_MAX_IDENTITY_LEN + 1];
2076 size_t identitylen = 0;
2077 unsigned char psk[PSK_MAX_PSK_LEN];
2078 unsigned char *tmppsk = NULL;
2079 char *tmpidentity = NULL;
2082 if (s->psk_client_callback == NULL) {
2083 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
2084 *al = SSL_AD_INTERNAL_ERROR;
2088 memset(identity, 0, sizeof(identity));
2090 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2091 identity, sizeof(identity) - 1,
2094 if (psklen > PSK_MAX_PSK_LEN) {
2095 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2096 *al = SSL_AD_HANDSHAKE_FAILURE;
2098 } else if (psklen == 0) {
2099 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
2100 SSL_R_PSK_IDENTITY_NOT_FOUND);
2101 *al = SSL_AD_HANDSHAKE_FAILURE;
2105 identitylen = strlen(identity);
2106 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2107 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2108 *al = SSL_AD_HANDSHAKE_FAILURE;
2112 tmppsk = OPENSSL_memdup(psk, psklen);
2113 tmpidentity = OPENSSL_strdup(identity);
2114 if (tmppsk == NULL || tmpidentity == NULL) {
2115 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
2116 *al = SSL_AD_INTERNAL_ERROR;
2120 OPENSSL_free(s->s3->tmp.psk);
2121 s->s3->tmp.psk = tmppsk;
2122 s->s3->tmp.psklen = psklen;
2124 OPENSSL_free(s->session->psk_identity);
2125 s->session->psk_identity = tmpidentity;
2128 if (!WPACKET_sub_memcpy_u16(pkt, identity, identitylen)) {
2129 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2130 *al = SSL_AD_INTERNAL_ERROR;
2137 OPENSSL_cleanse(psk, psklen);
2138 OPENSSL_cleanse(identity, sizeof(identity));
2139 OPENSSL_clear_free(tmppsk, psklen);
2140 OPENSSL_clear_free(tmpidentity, identitylen);
2144 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2145 *al = SSL_AD_INTERNAL_ERROR;
2150 static int tls_construct_cke_rsa(SSL *s, WPACKET *pkt, int *al)
2152 #ifndef OPENSSL_NO_RSA
2153 unsigned char *encdata = NULL;
2154 EVP_PKEY *pkey = NULL;
2155 EVP_PKEY_CTX *pctx = NULL;
2157 unsigned char *pms = NULL;
2160 if (s->session->peer == NULL) {
2162 * We should always have a server certificate with SSL_kRSA.
2164 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2168 pkey = X509_get0_pubkey(s->session->peer);
2169 if (EVP_PKEY_get0_RSA(pkey) == NULL) {
2170 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2174 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2175 pms = OPENSSL_malloc(pmslen);
2177 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
2178 *al = SSL_AD_INTERNAL_ERROR;
2182 pms[0] = s->client_version >> 8;
2183 pms[1] = s->client_version & 0xff;
2184 if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
2188 /* Fix buf for TLS and beyond */
2189 if (s->version > SSL3_VERSION && !WPACKET_start_sub_packet_u16(pkt)) {
2190 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2193 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2194 if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
2195 || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
2196 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
2199 if (!WPACKET_allocate_bytes(pkt, enclen, &encdata)
2200 || EVP_PKEY_encrypt(pctx, encdata, &enclen, pms, pmslen) <= 0) {
2201 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
2204 EVP_PKEY_CTX_free(pctx);
2207 if (s->options & SSL_OP_PKCS1_CHECK_1)
2209 if (s->options & SSL_OP_PKCS1_CHECK_2)
2213 /* Fix buf for TLS and beyond */
2214 if (s->version > SSL3_VERSION && !WPACKET_close(pkt)) {
2215 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2219 s->s3->tmp.pms = pms;
2220 s->s3->tmp.pmslen = pmslen;
2224 OPENSSL_clear_free(pms, pmslen);
2225 EVP_PKEY_CTX_free(pctx);
2229 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2230 *al = SSL_AD_INTERNAL_ERROR;
2235 static int tls_construct_cke_dhe(SSL *s, WPACKET *pkt, int *al)
2237 #ifndef OPENSSL_NO_DH
2239 const BIGNUM *pub_key;
2240 EVP_PKEY *ckey = NULL, *skey = NULL;
2241 unsigned char *keybytes = NULL;
2243 skey = s->s3->peer_tmp;
2247 ckey = ssl_generate_pkey(skey);
2248 dh_clnt = EVP_PKEY_get0_DH(ckey);
2250 if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0)
2253 /* send off the data */
2254 DH_get0_key(dh_clnt, &pub_key, NULL);
2255 if (!WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(pub_key), &keybytes))
2258 BN_bn2bin(pub_key, keybytes);
2259 EVP_PKEY_free(ckey);
2263 EVP_PKEY_free(ckey);
2265 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2266 *al = SSL_AD_INTERNAL_ERROR;
2270 static int tls_construct_cke_ecdhe(SSL *s, WPACKET *pkt, int *al)
2272 #ifndef OPENSSL_NO_EC
2273 unsigned char *encodedPoint = NULL;
2274 int encoded_pt_len = 0;
2275 EVP_PKEY *ckey = NULL, *skey = NULL;
2278 skey = s->s3->peer_tmp;
2280 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2284 ckey = ssl_generate_pkey(skey);
2286 if (ssl_derive(s, ckey, skey) == 0) {
2287 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
2291 /* Generate encoding of client key */
2292 encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
2294 if (encoded_pt_len == 0) {
2295 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
2299 if (!WPACKET_sub_memcpy_u8(pkt, encodedPoint, encoded_pt_len)) {
2300 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2306 OPENSSL_free(encodedPoint);
2307 EVP_PKEY_free(ckey);
2310 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2311 *al = SSL_AD_INTERNAL_ERROR;
2316 static int tls_construct_cke_gost(SSL *s, WPACKET *pkt, int *al)
2318 #ifndef OPENSSL_NO_GOST
2319 /* GOST key exchange message creation */
2320 EVP_PKEY_CTX *pkey_ctx = NULL;
2323 unsigned int md_len;
2324 unsigned char shared_ukm[32], tmp[256];
2325 EVP_MD_CTX *ukm_hash = NULL;
2326 int dgst_nid = NID_id_GostR3411_94;
2327 unsigned char *pms = NULL;
2330 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2331 dgst_nid = NID_id_GostR3411_2012_256;
2334 * Get server sertificate PKEY and create ctx from it
2336 peer_cert = s->session->peer;
2338 *al = SSL_AD_HANDSHAKE_FAILURE;
2339 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
2340 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2344 pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
2345 if (pkey_ctx == NULL) {
2346 *al = SSL_AD_INTERNAL_ERROR;
2347 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2351 * If we have send a certificate, and certificate key
2352 * parameters match those of server certificate, use
2353 * certificate key for key exchange
2356 /* Otherwise, generate ephemeral key pair */
2358 pms = OPENSSL_malloc(pmslen);
2360 *al = SSL_AD_INTERNAL_ERROR;
2361 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2365 if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2366 /* Generate session key */
2367 || RAND_bytes(pms, pmslen) <= 0) {
2368 *al = SSL_AD_INTERNAL_ERROR;
2369 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2373 * Compute shared IV and store it in algorithm-specific context
2376 ukm_hash = EVP_MD_CTX_new();
2377 if (ukm_hash == NULL
2378 || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0
2379 || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
2380 SSL3_RANDOM_SIZE) <= 0
2381 || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
2382 SSL3_RANDOM_SIZE) <= 0
2383 || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
2384 *al = SSL_AD_INTERNAL_ERROR;
2385 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2388 EVP_MD_CTX_free(ukm_hash);
2390 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
2391 EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
2392 *al = SSL_AD_INTERNAL_ERROR;
2393 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2396 /* Make GOST keytransport blob message */
2398 * Encapsulate it into sequence
2401 if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
2402 *al = SSL_AD_INTERNAL_ERROR;
2403 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
2407 if (!WPACKET_put_bytes_u8(pkt, V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)
2408 || (msglen >= 0x80 && !WPACKET_put_bytes_u8(pkt, 0x81))
2409 || !WPACKET_sub_memcpy_u8(pkt, tmp, msglen)) {
2410 *al = SSL_AD_INTERNAL_ERROR;
2411 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2415 EVP_PKEY_CTX_free(pkey_ctx);
2416 s->s3->tmp.pms = pms;
2417 s->s3->tmp.pmslen = pmslen;
2421 EVP_PKEY_CTX_free(pkey_ctx);
2422 OPENSSL_clear_free(pms, pmslen);
2423 EVP_MD_CTX_free(ukm_hash);
2426 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2427 *al = SSL_AD_INTERNAL_ERROR;
2432 static int tls_construct_cke_srp(SSL *s, WPACKET *pkt, int *al)
2434 #ifndef OPENSSL_NO_SRP
2435 unsigned char *abytes = NULL;
2437 if (s->srp_ctx.A == NULL
2438 || !WPACKET_sub_allocate_bytes_u16(pkt, BN_num_bytes(s->srp_ctx.A),
2440 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2443 BN_bn2bin(s->srp_ctx.A, abytes);
2445 OPENSSL_free(s->session->srp_username);
2446 s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
2447 if (s->session->srp_username == NULL) {
2448 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE);
2454 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
2455 *al = SSL_AD_INTERNAL_ERROR;
2460 int tls_construct_client_key_exchange(SSL *s)
2462 unsigned long alg_k;
2466 if (!WPACKET_init(&pkt, s->init_buf)) {
2467 /* Should not happen */
2468 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2472 if (!ssl_set_handshake_header2(s, &pkt, SSL3_MT_CLIENT_KEY_EXCHANGE)) {
2473 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2474 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2478 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2480 if ((alg_k & SSL_PSK)
2481 && !tls_construct_cke_psk_preamble(s, &pkt, &al))
2484 if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
2485 if (!tls_construct_cke_rsa(s, &pkt, &al))
2487 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
2488 if (!tls_construct_cke_dhe(s, &pkt, &al))
2490 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
2491 if (!tls_construct_cke_ecdhe(s, &pkt, &al))
2493 } else if (alg_k & SSL_kGOST) {
2494 if (!tls_construct_cke_gost(s, &pkt, &al))
2496 } else if (alg_k & SSL_kSRP) {
2497 if (!tls_construct_cke_srp(s, &pkt, &al))
2499 } else if (!(alg_k & SSL_kPSK)) {
2500 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2501 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2505 if (!ssl_close_construct_packet(s, &pkt)) {
2506 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2507 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2514 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2515 OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
2516 s->s3->tmp.pms = NULL;
2517 #ifndef OPENSSL_NO_PSK
2518 OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
2519 s->s3->tmp.psk = NULL;
2521 WPACKET_cleanup(&pkt);
2522 ossl_statem_set_error(s);
2526 int tls_client_key_exchange_post_work(SSL *s)
2528 unsigned char *pms = NULL;
2531 pms = s->s3->tmp.pms;
2532 pmslen = s->s3->tmp.pmslen;
2534 #ifndef OPENSSL_NO_SRP
2536 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2537 if (!srp_generate_client_master_secret(s)) {
2538 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
2539 ERR_R_INTERNAL_ERROR);
2546 if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
2547 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2548 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
2551 if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
2552 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2553 SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
2554 /* ssl_generate_master_secret frees the pms even on error */
2562 #ifndef OPENSSL_NO_SCTP
2563 if (SSL_IS_DTLS(s)) {
2564 unsigned char sctpauthkey[64];
2565 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
2568 * Add new shared key for SCTP-Auth, will be ignored if no SCTP
2571 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
2572 sizeof(DTLS1_SCTP_AUTH_LABEL));
2574 if (SSL_export_keying_material(s, sctpauthkey,
2575 sizeof(sctpauthkey), labelbuffer,
2576 sizeof(labelbuffer), NULL, 0, 0) <= 0)
2579 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
2580 sizeof(sctpauthkey), sctpauthkey);
2586 OPENSSL_clear_free(pms, pmslen);
2587 s->s3->tmp.pms = NULL;
2591 int tls_construct_client_verify(SSL *s)
2594 const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
2595 EVP_MD_CTX *mctx = NULL;
2599 unsigned char *sig = NULL;
2602 if (!WPACKET_init(&pkt, s->init_buf)) {
2603 /* Should not happen */
2604 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2608 if (!ssl_set_handshake_header2(s, &pkt, SSL3_MT_CERTIFICATE_VERIFY)) {
2609 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2613 mctx = EVP_MD_CTX_new();
2615 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2618 pkey = s->cert->key->privatekey;
2620 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
2621 if (hdatalen <= 0) {
2622 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2625 if (SSL_USE_SIGALGS(s)&& !tls12_get_sigandhash(&pkt, pkey, md)) {
2626 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2630 fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
2632 sig = OPENSSL_malloc(EVP_PKEY_size(pkey));
2634 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
2637 if (!EVP_SignInit_ex(mctx, md, NULL)
2638 || !EVP_SignUpdate(mctx, hdata, hdatalen)
2639 || (s->version == SSL3_VERSION
2640 && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
2641 s->session->master_key_length,
2642 s->session->master_key))
2643 || !EVP_SignFinal(mctx, sig, &u, pkey)) {
2644 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
2647 #ifndef OPENSSL_NO_GOST
2649 int pktype = EVP_PKEY_id(pkey);
2650 if (pktype == NID_id_GostR3410_2001
2651 || pktype == NID_id_GostR3410_2012_256
2652 || pktype == NID_id_GostR3410_2012_512)
2653 BUF_reverse(sig, NULL, u);
2657 if (!WPACKET_sub_memcpy_u16(&pkt, sig, u)) {
2658 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2662 /* Digest cached records and discard handshake buffer */
2663 if (!ssl3_digest_cached_records(s, 0))
2666 if (!ssl_close_construct_packet(s, &pkt)) {
2667 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
2672 EVP_MD_CTX_free(mctx);
2675 WPACKET_cleanup(&pkt);
2677 EVP_MD_CTX_free(mctx);
2678 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2683 * Check a certificate can be used for client authentication. Currently check
2684 * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
2685 * certificates can be used and optionally checks suitability for Suite B.
2687 static int ssl3_check_client_certificate(SSL *s)
2689 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
2691 /* If no suitable signature algorithm can't use certificate */
2692 if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
2695 * If strict mode check suitability of chain before using it. This also
2696 * adjusts suite B digest if necessary.
2698 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
2699 !tls1_check_chain(s, NULL, NULL, NULL, -2))
2704 WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
2707 EVP_PKEY *pkey = NULL;
2710 if (wst == WORK_MORE_A) {
2711 /* Let cert callback update client certificates if required */
2712 if (s->cert->cert_cb) {
2713 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
2715 s->rwstate = SSL_X509_LOOKUP;
2719 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2720 ossl_statem_set_error(s);
2723 s->rwstate = SSL_NOTHING;
2725 if (ssl3_check_client_certificate(s))
2726 return WORK_FINISHED_CONTINUE;
2728 /* Fall through to WORK_MORE_B */
2732 /* We need to get a client cert */
2733 if (wst == WORK_MORE_B) {
2735 * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
2736 * return(-1); We then get retied later
2738 i = ssl_do_client_cert_cb(s, &x509, &pkey);
2740 s->rwstate = SSL_X509_LOOKUP;
2743 s->rwstate = SSL_NOTHING;
2744 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
2745 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
2747 } else if (i == 1) {
2749 SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
2750 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
2754 EVP_PKEY_free(pkey);
2755 if (i && !ssl3_check_client_certificate(s))
2758 if (s->version == SSL3_VERSION) {
2759 s->s3->tmp.cert_req = 0;
2760 ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
2761 return WORK_FINISHED_CONTINUE;
2763 s->s3->tmp.cert_req = 2;
2764 if (!ssl3_digest_cached_records(s, 0)) {
2765 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2766 ossl_statem_set_error(s);
2772 return WORK_FINISHED_CONTINUE;
2775 /* Shouldn't ever get here */
2779 int tls_construct_client_certificate(SSL *s)
2781 if (!ssl3_output_cert_chain(s,
2782 (s->s3->tmp.cert_req ==
2783 2) ? NULL : s->cert->key)) {
2784 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
2785 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2786 ossl_statem_set_error(s);
2793 #define has_bits(i,m) (((i)&(m)) == (m))
2795 int ssl3_check_cert_and_algorithm(SSL *s)
2798 #ifndef OPENSSL_NO_EC
2802 EVP_PKEY *pkey = NULL;
2803 int al = SSL_AD_HANDSHAKE_FAILURE;
2805 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2806 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2808 /* we don't have a certificate */
2809 if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
2812 /* This is the passed certificate */
2814 #ifndef OPENSSL_NO_EC
2815 idx = s->session->peer_type;
2816 if (idx == SSL_PKEY_ECC) {
2817 if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
2819 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
2824 } else if (alg_a & SSL_aECDSA) {
2825 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2826 SSL_R_MISSING_ECDSA_SIGNING_CERT);
2830 pkey = X509_get0_pubkey(s->session->peer);
2831 i = X509_certificate_type(s->session->peer, pkey);
2833 /* Check that we have a certificate if we require one */
2834 if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
2835 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2836 SSL_R_MISSING_RSA_SIGNING_CERT);
2839 #ifndef OPENSSL_NO_DSA
2840 else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
2841 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2842 SSL_R_MISSING_DSA_SIGNING_CERT);
2846 #ifndef OPENSSL_NO_RSA
2847 if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
2848 !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
2849 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
2850 SSL_R_MISSING_RSA_ENCRYPTING_CERT);
2854 #ifndef OPENSSL_NO_DH
2855 if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
2856 al = SSL_AD_INTERNAL_ERROR;
2857 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
2864 ssl3_send_alert(s, SSL3_AL_FATAL, al);
2868 #ifndef OPENSSL_NO_NEXTPROTONEG
2869 int tls_construct_next_proto(SSL *s)
2871 size_t len, padding_len;
2872 unsigned char *padding = NULL;
2875 if (!WPACKET_init(&pkt, s->init_buf)) {
2876 /* Should not happen */
2877 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2881 if (!ssl_set_handshake_header2(s, &pkt, SSL3_MT_NEXT_PROTO)) {
2882 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2886 len = s->next_proto_negotiated_len;
2887 padding_len = 32 - ((len + 2) % 32);
2889 if (!WPACKET_sub_memcpy_u8(&pkt, s->next_proto_negotiated, len)
2890 || !WPACKET_sub_allocate_bytes_u8(&pkt, padding_len, &padding)) {
2891 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2895 memset(padding, 0, padding_len);
2897 if (!ssl_close_construct_packet(s, &pkt)) {
2898 SSLerr(SSL_F_TLS_CONSTRUCT_NEXT_PROTO, ERR_R_INTERNAL_ERROR);
2904 WPACKET_cleanup(&pkt);
2905 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2910 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
2913 #ifndef OPENSSL_NO_ENGINE
2914 if (s->ctx->client_cert_engine) {
2915 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
2916 SSL_get_client_CA_list(s),
2917 px509, ppkey, NULL, NULL, NULL);
2922 if (s->ctx->client_cert_cb)
2923 i = s->ctx->client_cert_cb(s, px509, ppkey);
2927 int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, WPACKET *pkt)
2930 size_t totlen = 0, len, maxlen;
2931 int empty_reneg_info_scsv = !s->renegotiate;
2932 /* Set disabled masks for this session */
2933 ssl_set_client_disabled(s);
2938 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
2939 # if OPENSSL_MAX_TLS1_2_CIPHER_LENGTH < 6
2940 # error Max cipher length too short
2943 * Some servers hang if client hello > 256 bytes as hack workaround
2944 * chop number of supported ciphers to keep it well below this if we
2947 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2948 maxlen = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
2951 /* Maximum length that can be stored in 2 bytes. Length must be even */
2954 if (empty_reneg_info_scsv)
2956 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
2959 for (i = 0; i < sk_SSL_CIPHER_num(sk) && totlen < maxlen; i++) {
2960 const SSL_CIPHER *c;
2962 c = sk_SSL_CIPHER_value(sk, i);
2963 /* Skip disabled ciphers */
2964 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
2967 if (!s->method->put_cipher_by_char(c, pkt, &len)) {
2968 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2976 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, SSL_R_NO_CIPHERS_AVAILABLE);
2981 if (empty_reneg_info_scsv) {
2982 static SSL_CIPHER scsv = {
2983 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2985 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2986 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);
2990 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
2991 static SSL_CIPHER scsv = {
2992 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2994 if (!s->method->put_cipher_by_char(&scsv, pkt, &len)) {
2995 SSLerr(SSL_F_SSL_CIPHER_LIST_TO_BYTES, ERR_R_INTERNAL_ERROR);