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,
70 * Is a CertificateRequest message allowed at the moment or not?
76 static ossl_inline int cert_req_allowed(SSL *s)
78 /* TLS does not like anon-DH with client cert */
79 if ((s->version > SSL3_VERSION
80 && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
81 || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK)))
88 * Should we expect the ServerKeyExchange message or not?
94 static int key_exchange_expected(SSL *s)
96 long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
99 * Can't skip server key exchange if this is an ephemeral
100 * ciphersuite or for SRP
102 if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK
111 * ossl_statem_client_read_transition() encapsulates the logic for the allowed
112 * handshake state transitions when the client is reading messages from the
113 * server. The message type that the server has sent is provided in |mt|. The
114 * current state is in |s->statem.hand_state|.
117 * 1: Success (transition allowed)
118 * 0: Error (transition not allowed)
120 int ossl_statem_client_read_transition(SSL *s, int mt)
122 OSSL_STATEM *st = &s->statem;
125 switch(st->hand_state) {
126 case TLS_ST_CW_CLNT_HELLO:
127 if (mt == SSL3_MT_SERVER_HELLO) {
128 st->hand_state = TLS_ST_CR_SRVR_HELLO;
132 if (SSL_IS_DTLS(s)) {
133 if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
134 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
140 case TLS_ST_CR_SRVR_HELLO:
142 if (s->tlsext_ticket_expected) {
143 if (mt == SSL3_MT_NEWSESSION_TICKET) {
144 st->hand_state = TLS_ST_CR_SESSION_TICKET;
147 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
148 st->hand_state = TLS_ST_CR_CHANGE;
152 if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
153 st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
155 } else if (s->version >= TLS1_VERSION
156 && s->tls_session_secret_cb != NULL
157 && s->session->tlsext_tick != NULL
158 && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
160 * Normally, we can tell if the server is resuming the session
161 * from the session ID. EAP-FAST (RFC 4851), however, relies on
162 * the next server message after the ServerHello to determine if
163 * the server is resuming.
166 st->hand_state = TLS_ST_CR_CHANGE;
168 } else if (!(s->s3->tmp.new_cipher->algorithm_auth
169 & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
170 if (mt == SSL3_MT_CERTIFICATE) {
171 st->hand_state = TLS_ST_CR_CERT;
175 ske_expected = key_exchange_expected(s);
176 /* SKE is optional for some PSK ciphersuites */
178 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
179 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
180 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
181 st->hand_state = TLS_ST_CR_KEY_EXCH;
184 } else if (mt == SSL3_MT_CERTIFICATE_REQUEST
185 && cert_req_allowed(s)) {
186 st->hand_state = TLS_ST_CR_CERT_REQ;
188 } else if (mt == SSL3_MT_SERVER_DONE) {
189 st->hand_state = TLS_ST_CR_SRVR_DONE;
198 * The CertificateStatus message is optional even if
199 * |tlsext_status_expected| is set
201 if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
202 st->hand_state = TLS_ST_CR_CERT_STATUS;
207 case TLS_ST_CR_CERT_STATUS:
208 ske_expected = key_exchange_expected(s);
209 /* SKE is optional for some PSK ciphersuites */
211 || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
212 && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
213 if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
214 st->hand_state = TLS_ST_CR_KEY_EXCH;
221 case TLS_ST_CR_KEY_EXCH:
222 if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
223 if (cert_req_allowed(s)) {
224 st->hand_state = TLS_ST_CR_CERT_REQ;
231 case TLS_ST_CR_CERT_REQ:
232 if (mt == SSL3_MT_SERVER_DONE) {
233 st->hand_state = TLS_ST_CR_SRVR_DONE;
238 case TLS_ST_CW_FINISHED:
239 if (s->tlsext_ticket_expected) {
240 if (mt == SSL3_MT_NEWSESSION_TICKET) {
241 st->hand_state = TLS_ST_CR_SESSION_TICKET;
244 } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
245 st->hand_state = TLS_ST_CR_CHANGE;
250 case TLS_ST_CR_SESSION_TICKET:
251 if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
252 st->hand_state = TLS_ST_CR_CHANGE;
257 case TLS_ST_CR_CHANGE:
258 if (mt == SSL3_MT_FINISHED) {
259 st->hand_state = TLS_ST_CR_FINISHED;
269 /* No valid transition found */
270 ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE);
271 SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE);
276 * client_write_transition() works out what handshake state to move to next
277 * when the client is writing messages to be sent to the server.
279 WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
281 OSSL_STATEM *st = &s->statem;
283 switch(st->hand_state) {
285 /* Renegotiation - fall through */
287 st->hand_state = TLS_ST_CW_CLNT_HELLO;
288 return WRITE_TRAN_CONTINUE;
290 case TLS_ST_CW_CLNT_HELLO:
292 * No transition at the end of writing because we don't know what
295 return WRITE_TRAN_FINISHED;
297 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
298 st->hand_state = TLS_ST_CW_CLNT_HELLO;
299 return WRITE_TRAN_CONTINUE;
301 case TLS_ST_CR_SRVR_DONE:
302 if (s->s3->tmp.cert_req)
303 st->hand_state = TLS_ST_CW_CERT;
305 st->hand_state = TLS_ST_CW_KEY_EXCH;
306 return WRITE_TRAN_CONTINUE;
309 st->hand_state = TLS_ST_CW_KEY_EXCH;
310 return WRITE_TRAN_CONTINUE;
312 case TLS_ST_CW_KEY_EXCH:
314 * For TLS, cert_req is set to 2, so a cert chain of nothing is
315 * sent, but no verify packet is sent
318 * XXX: For now, we do not support client authentication in ECDH
319 * cipher suites with ECDH (rather than ECDSA) certificates. We
320 * need to skip the certificate verify message when client's
321 * ECDH public key is sent inside the client certificate.
323 if (s->s3->tmp.cert_req == 1) {
324 st->hand_state = TLS_ST_CW_CERT_VRFY;
326 st->hand_state = TLS_ST_CW_CHANGE;
328 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
329 st->hand_state = TLS_ST_CW_CHANGE;
331 return WRITE_TRAN_CONTINUE;
333 case TLS_ST_CW_CERT_VRFY:
334 st->hand_state = TLS_ST_CW_CHANGE;
335 return WRITE_TRAN_CONTINUE;
337 case TLS_ST_CW_CHANGE:
338 #if defined(OPENSSL_NO_NEXTPROTONEG)
339 st->hand_state = TLS_ST_CW_FINISHED;
341 if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
342 st->hand_state = TLS_ST_CW_NEXT_PROTO;
344 st->hand_state = TLS_ST_CW_FINISHED;
346 return WRITE_TRAN_CONTINUE;
348 #if !defined(OPENSSL_NO_NEXTPROTONEG)
349 case TLS_ST_CW_NEXT_PROTO:
350 st->hand_state = TLS_ST_CW_FINISHED;
351 return WRITE_TRAN_CONTINUE;
354 case TLS_ST_CW_FINISHED:
356 st->hand_state = TLS_ST_OK;
357 ossl_statem_set_in_init(s, 0);
358 return WRITE_TRAN_CONTINUE;
360 return WRITE_TRAN_FINISHED;
363 case TLS_ST_CR_FINISHED:
365 st->hand_state = TLS_ST_CW_CHANGE;
366 return WRITE_TRAN_CONTINUE;
368 st->hand_state = TLS_ST_OK;
369 ossl_statem_set_in_init(s, 0);
370 return WRITE_TRAN_CONTINUE;
374 /* Shouldn't happen */
375 return WRITE_TRAN_ERROR;
380 * Perform any pre work that needs to be done prior to sending a message from
381 * the client to the server.
383 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst)
385 OSSL_STATEM *st = &s->statem;
387 switch(st->hand_state) {
388 case TLS_ST_CW_CLNT_HELLO:
390 if (SSL_IS_DTLS(s)) {
391 /* every DTLS ClientHello resets Finished MAC */
392 if (!ssl3_init_finished_mac(s)) {
393 ossl_statem_set_error(s);
399 case TLS_ST_CW_CHANGE:
400 if (SSL_IS_DTLS(s)) {
403 * We're into the last flight so we don't retransmit these
404 * messages unless we need to.
408 #ifndef OPENSSL_NO_SCTP
409 if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
410 return dtls_wait_for_dry(s);
413 return WORK_FINISHED_CONTINUE;
416 return tls_finish_handshake(s, wst);
419 /* No pre work to be done */
423 return WORK_FINISHED_CONTINUE;
427 * Perform any work that needs to be done after sending a message from the
428 * client to the server.
430 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst)
432 OSSL_STATEM *st = &s->statem;
436 switch(st->hand_state) {
437 case TLS_ST_CW_CLNT_HELLO:
438 if (wst == WORK_MORE_A && statem_flush(s) != 1)
441 if (SSL_IS_DTLS(s)) {
442 /* Treat the next message as the first packet */
447 case TLS_ST_CW_KEY_EXCH:
448 if (tls_client_key_exchange_post_work(s) == 0)
452 case TLS_ST_CW_CHANGE:
453 s->session->cipher = s->s3->tmp.new_cipher;
454 #ifdef OPENSSL_NO_COMP
455 s->session->compress_meth = 0;
457 if (s->s3->tmp.new_compression == NULL)
458 s->session->compress_meth = 0;
460 s->session->compress_meth = s->s3->tmp.new_compression->id;
462 if (!s->method->ssl3_enc->setup_key_block(s))
465 if (!s->method->ssl3_enc->change_cipher_state(s,
466 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
469 if (SSL_IS_DTLS(s)) {
470 #ifndef OPENSSL_NO_SCTP
473 * Change to new shared key of SCTP-Auth, will be ignored if
476 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
481 dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
485 case TLS_ST_CW_FINISHED:
486 #ifndef OPENSSL_NO_SCTP
487 if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
489 * Change to new shared key of SCTP-Auth, will be ignored if
492 BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
496 if (statem_flush(s) != 1)
501 /* No post work to be done */
505 return WORK_FINISHED_CONTINUE;
509 * Construct a message to be sent from the client to the server.
511 * Valid return values are:
515 int ossl_statem_client_construct_message(SSL *s)
517 OSSL_STATEM *st = &s->statem;
519 switch(st->hand_state) {
520 case TLS_ST_CW_CLNT_HELLO:
521 return tls_construct_client_hello(s);
524 return tls_construct_client_certificate(s);
526 case TLS_ST_CW_KEY_EXCH:
527 return tls_construct_client_key_exchange(s);
529 case TLS_ST_CW_CERT_VRFY:
530 return tls_construct_client_verify(s);
532 case TLS_ST_CW_CHANGE:
534 return dtls_construct_change_cipher_spec(s);
536 return tls_construct_change_cipher_spec(s);
538 #if !defined(OPENSSL_NO_NEXTPROTONEG)
539 case TLS_ST_CW_NEXT_PROTO:
540 return tls_construct_next_proto(s);
542 case TLS_ST_CW_FINISHED:
543 return tls_construct_finished(s,
545 ssl3_enc->client_finished_label,
547 ssl3_enc->client_finished_label_len);
550 /* Shouldn't happen */
558 * Returns the maximum allowed length for the current message that we are
559 * reading. Excludes the message header.
561 unsigned long ossl_statem_client_max_message_size(SSL *s)
563 OSSL_STATEM *st = &s->statem;
565 switch(st->hand_state) {
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:
582 /* Set to s->max_cert_list for compatibility with previous releases.
583 * In practice these messages can get quite long if servers are
584 * configured to provide a long list of acceptable CAs
586 return s->max_cert_list;
588 case TLS_ST_CR_SRVR_DONE:
589 return SERVER_HELLO_DONE_MAX_LENGTH;
591 case TLS_ST_CR_CHANGE:
592 if (s->version == DTLS1_BAD_VER)
594 return CCS_MAX_LENGTH;
596 case TLS_ST_CR_SESSION_TICKET:
597 return SSL3_RT_MAX_PLAIN_LENGTH;
599 case TLS_ST_CR_FINISHED:
600 return FINISHED_MAX_LENGTH;
603 /* Shouldn't happen */
611 * Process a message that the client has been received from the server.
613 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
615 OSSL_STATEM *st = &s->statem;
617 switch(st->hand_state) {
618 case TLS_ST_CR_SRVR_HELLO:
619 return tls_process_server_hello(s, pkt);
621 case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
622 return dtls_process_hello_verify(s, pkt);
625 return tls_process_server_certificate(s, pkt);
627 case TLS_ST_CR_CERT_STATUS:
628 return tls_process_cert_status(s, pkt);
630 case TLS_ST_CR_KEY_EXCH:
631 return tls_process_key_exchange(s, pkt);
633 case TLS_ST_CR_CERT_REQ:
634 return tls_process_certificate_request(s, pkt);
636 case TLS_ST_CR_SRVR_DONE:
637 return tls_process_server_done(s, pkt);
639 case TLS_ST_CR_CHANGE:
640 return tls_process_change_cipher_spec(s, pkt);
642 case TLS_ST_CR_SESSION_TICKET:
643 return tls_process_new_session_ticket(s, pkt);
645 case TLS_ST_CR_FINISHED:
646 return tls_process_finished(s, pkt);
649 /* Shouldn't happen */
653 return MSG_PROCESS_ERROR;
657 * Perform any further processing required following the receipt of a message
660 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
662 OSSL_STATEM *st = &s->statem;
664 switch(st->hand_state) {
665 case TLS_ST_CR_CERT_REQ:
666 return tls_prepare_client_certificate(s, wst);
668 #ifndef OPENSSL_NO_SCTP
669 case TLS_ST_CR_SRVR_DONE:
670 /* We only get here if we are using SCTP and we are renegotiating */
671 if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
672 s->s3->in_read_app_data = 2;
673 s->rwstate = SSL_READING;
674 BIO_clear_retry_flags(SSL_get_rbio(s));
675 BIO_set_retry_read(SSL_get_rbio(s));
676 ossl_statem_set_sctp_read_sock(s, 1);
679 ossl_statem_set_sctp_read_sock(s, 0);
680 return WORK_FINISHED_STOP;
687 /* Shouldn't happen */
691 int tls_construct_client_hello(SSL *s)
694 unsigned char *p, *d;
699 #ifndef OPENSSL_NO_COMP
703 SSL_SESSION *sess = s->session;
705 buf = (unsigned char *)s->init_buf->data;
707 /* Work out what SSL/TLS/DTLS version to use */
708 protverr = ssl_set_client_hello_version(s);
710 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
714 if ((sess == NULL) ||
715 !ssl_version_supported(s, sess->ssl_version) ||
717 * In the case of EAP-FAST, we can have a pre-shared
718 * "ticket" without a session ID.
720 (!sess->session_id_length && !sess->tlsext_tick) ||
721 (sess->not_resumable)) {
722 if (!ssl_get_new_session(s, 0))
725 /* else use the pre-loaded session */
727 p = s->s3->client_random;
730 * for DTLS if client_random is initialized, reuse it, we are
731 * required to use same upon reply to HelloVerify
733 if (SSL_IS_DTLS(s)) {
736 for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
745 if (i && ssl_fill_hello_random(s, 0, p,
746 sizeof(s->s3->client_random)) <= 0)
749 /* Do the message type and length last */
750 d = p = ssl_handshake_start(s);
753 * version indicates the negotiated version: for example from
754 * an SSLv2/v3 compatible client hello). The client_version
755 * field is the maximum version we permit and it is also
756 * used in RSA encrypted premaster secrets. Some servers can
757 * choke if we initially report a higher version then
758 * renegotiate to a lower one in the premaster secret. This
759 * didn't happen with TLS 1.0 as most servers supported it
760 * but it can with TLS 1.1 or later if the server only supports
763 * Possible scenario with previous logic:
764 * 1. Client hello indicates TLS 1.2
765 * 2. Server hello says TLS 1.0
766 * 3. RSA encrypted premaster secret uses 1.2.
767 * 4. Handshake proceeds using TLS 1.0.
768 * 5. Server sends hello request to renegotiate.
769 * 6. Client hello indicates TLS v1.0 as we now
770 * know that is maximum server supports.
771 * 7. Server chokes on RSA encrypted premaster secret
772 * containing version 1.0.
774 * For interoperability it should be OK to always use the
775 * maximum version we support in client hello and then rely
776 * on the checking of version to ensure the servers isn't
777 * being inconsistent: for example initially negotiating with
778 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
779 * client_version in client hello and not resetting it to
780 * the negotiated version.
782 *(p++) = s->client_version >> 8;
783 *(p++) = s->client_version & 0xff;
786 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
787 p += SSL3_RANDOM_SIZE;
793 i = s->session->session_id_length;
796 if (i > (int)sizeof(s->session->session_id)) {
797 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
800 memcpy(p, s->session->session_id, i);
804 /* cookie stuff for DTLS */
805 if (SSL_IS_DTLS(s)) {
806 if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
807 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
810 *(p++) = s->d1->cookie_len;
811 memcpy(p, s->d1->cookie, s->d1->cookie_len);
812 p += s->d1->cookie_len;
815 /* Ciphers supported */
816 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
818 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
821 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
823 * Some servers hang if client hello > 256 bytes as hack workaround
824 * chop number of supported ciphers to keep it well below this if we
827 if (TLS1_get_version(s) >= TLS1_2_VERSION
828 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
829 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
835 #ifdef OPENSSL_NO_COMP
839 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
842 j = sk_SSL_COMP_num(s->ctx->comp_methods);
844 for (i = 0; i < j; i++) {
845 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
849 *(p++) = 0; /* Add the NULL method */
852 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
853 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
857 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
859 ssl3_send_alert(s, SSL3_AL_FATAL, al);
860 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
865 if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
866 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
867 SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
873 ossl_statem_set_error(s);
877 MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
880 unsigned int cookie_len;
883 if (!PACKET_forward(pkt, 2)
884 || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
885 al = SSL_AD_DECODE_ERROR;
886 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
890 cookie_len = PACKET_remaining(&cookiepkt);
891 if (cookie_len > sizeof(s->d1->cookie)) {
892 al = SSL_AD_ILLEGAL_PARAMETER;
893 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
897 if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
898 al = SSL_AD_DECODE_ERROR;
899 SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
902 s->d1->cookie_len = cookie_len;
904 return MSG_PROCESS_FINISHED_READING;
906 ssl3_send_alert(s, SSL3_AL_FATAL, al);
907 ossl_statem_set_error(s);
908 return MSG_PROCESS_ERROR;
911 MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
913 STACK_OF(SSL_CIPHER) *sk;
916 size_t session_id_len;
917 const unsigned char *cipherchars;
918 int i, al = SSL_AD_INTERNAL_ERROR;
919 unsigned int compression;
920 unsigned int sversion;
922 #ifndef OPENSSL_NO_COMP
926 if (!PACKET_get_net_2(pkt, &sversion)) {
927 al = SSL_AD_DECODE_ERROR;
928 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
932 protverr = ssl_choose_client_version(s, sversion);
934 al = SSL_AD_PROTOCOL_VERSION;
935 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
939 /* load the server hello data */
940 /* load the server random */
941 if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
942 al = SSL_AD_DECODE_ERROR;
943 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
949 /* Get the session-id. */
950 if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
951 al = SSL_AD_DECODE_ERROR;
952 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
955 session_id_len = PACKET_remaining(&session_id);
956 if (session_id_len > sizeof s->session->session_id
957 || session_id_len > SSL3_SESSION_ID_SIZE) {
958 al = SSL_AD_ILLEGAL_PARAMETER;
959 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
963 if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
964 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
965 al = SSL_AD_DECODE_ERROR;
970 * Check if we can resume the session based on external pre-shared secret.
971 * EAP-FAST (RFC 4851) supports two types of session resumption.
972 * Resumption based on server-side state works with session IDs.
973 * Resumption based on pre-shared Protected Access Credentials (PACs)
974 * works by overriding the SessionTicket extension at the application
975 * layer, and does not send a session ID. (We do not know whether EAP-FAST
976 * servers would honour the session ID.) Therefore, the session ID alone
977 * is not a reliable indicator of session resumption, so we first check if
978 * we can resume, and later peek at the next handshake message to see if the
979 * server wants to resume.
981 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
982 s->session->tlsext_tick) {
983 const SSL_CIPHER *pref_cipher = NULL;
984 s->session->master_key_length = sizeof(s->session->master_key);
985 if (s->tls_session_secret_cb(s, s->session->master_key,
986 &s->session->master_key_length,
988 s->tls_session_secret_cb_arg)) {
989 s->session->cipher = pref_cipher ?
990 pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
992 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
993 al = SSL_AD_INTERNAL_ERROR;
998 if (session_id_len != 0 && session_id_len == s->session->session_id_length
999 && memcmp(PACKET_data(&session_id), s->session->session_id,
1000 session_id_len) == 0) {
1001 if (s->sid_ctx_length != s->session->sid_ctx_length
1002 || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
1003 /* actually a client application bug */
1004 al = SSL_AD_ILLEGAL_PARAMETER;
1005 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1006 SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1012 * If we were trying for session-id reuse but the server
1013 * didn't echo the ID, make a new SSL_SESSION.
1014 * In the case of EAP-FAST and PAC, we do not send a session ID,
1015 * so the PAC-based session secret is always preserved. It'll be
1016 * overwritten if the server refuses resumption.
1018 if (s->session->session_id_length > 0) {
1019 s->ctx->stats.sess_miss++;
1020 if (!ssl_get_new_session(s, 0)) {
1025 s->session->ssl_version = s->version;
1026 s->session->session_id_length = session_id_len;
1027 /* session_id_len could be 0 */
1028 memcpy(s->session->session_id, PACKET_data(&session_id),
1032 /* Session version and negotiated protocol version should match */
1033 if (s->version != s->session->ssl_version) {
1034 al = SSL_AD_PROTOCOL_VERSION;
1036 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1037 SSL_R_SSL_SESSION_VERSION_MISMATCH);
1041 c = ssl_get_cipher_by_char(s, cipherchars);
1043 /* unknown cipher */
1044 al = SSL_AD_ILLEGAL_PARAMETER;
1045 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
1049 * Now that we know the version, update the check to see if it's an allowed
1052 s->s3->tmp.min_ver = s->version;
1053 s->s3->tmp.max_ver = s->version;
1055 * If it is a disabled cipher we either didn't send it in client hello,
1056 * or it's not allowed for the selected protocol. So we return an error.
1058 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
1059 al = SSL_AD_ILLEGAL_PARAMETER;
1060 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1064 sk = ssl_get_ciphers_by_id(s);
1065 i = sk_SSL_CIPHER_find(sk, c);
1067 /* we did not say we would use this cipher */
1068 al = SSL_AD_ILLEGAL_PARAMETER;
1069 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
1074 * Depending on the session caching (internal/external), the cipher
1075 * and/or cipher_id values may not be set. Make sure that cipher_id is
1076 * set and use it for comparison.
1078 if (s->session->cipher)
1079 s->session->cipher_id = s->session->cipher->id;
1080 if (s->hit && (s->session->cipher_id != c->id)) {
1081 al = SSL_AD_ILLEGAL_PARAMETER;
1082 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1083 SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1086 s->s3->tmp.new_cipher = c;
1087 /* lets get the compression algorithm */
1089 if (!PACKET_get_1(pkt, &compression)) {
1090 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
1091 al = SSL_AD_DECODE_ERROR;
1094 #ifdef OPENSSL_NO_COMP
1095 if (compression != 0) {
1096 al = SSL_AD_ILLEGAL_PARAMETER;
1097 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1098 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1102 * If compression is disabled we'd better not try to resume a session
1103 * using compression.
1105 if (s->session->compress_meth != 0) {
1106 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
1110 if (s->hit && compression != s->session->compress_meth) {
1111 al = SSL_AD_ILLEGAL_PARAMETER;
1112 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1113 SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1116 if (compression == 0)
1118 else if (!ssl_allow_compression(s)) {
1119 al = SSL_AD_ILLEGAL_PARAMETER;
1120 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
1123 comp = ssl3_comp_find(s->ctx->comp_methods, compression);
1126 if (compression != 0 && comp == NULL) {
1127 al = SSL_AD_ILLEGAL_PARAMETER;
1128 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
1129 SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1132 s->s3->tmp.new_compression = comp;
1136 /* TLS extensions */
1137 if (!ssl_parse_serverhello_tlsext(s, pkt)) {
1138 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
1142 if (PACKET_remaining(pkt) != 0) {
1143 /* wrong packet length */
1144 al = SSL_AD_DECODE_ERROR;
1145 SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
1149 #ifndef OPENSSL_NO_SCTP
1150 if (SSL_IS_DTLS(s) && s->hit) {
1151 unsigned char sctpauthkey[64];
1152 char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
1155 * Add new shared key for SCTP-Auth, will be ignored if
1158 memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
1159 sizeof(DTLS1_SCTP_AUTH_LABEL));
1161 if (SSL_export_keying_material(s, sctpauthkey,
1162 sizeof(sctpauthkey),
1164 sizeof(labelbuffer), NULL, 0,
1168 BIO_ctrl(SSL_get_wbio(s),
1169 BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
1170 sizeof(sctpauthkey), sctpauthkey);
1174 return MSG_PROCESS_CONTINUE_READING;
1176 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1178 ossl_statem_set_error(s);
1179 return MSG_PROCESS_ERROR;
1182 MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
1184 int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
1185 unsigned long cert_list_len, cert_len;
1187 const unsigned char *certstart, *certbytes;
1188 STACK_OF(X509) *sk = NULL;
1189 EVP_PKEY *pkey = NULL;
1191 if ((sk = sk_X509_new_null()) == NULL) {
1192 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1196 if (!PACKET_get_net_3(pkt, &cert_list_len)
1197 || PACKET_remaining(pkt) != cert_list_len) {
1198 al = SSL_AD_DECODE_ERROR;
1199 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
1202 while (PACKET_remaining(pkt)) {
1203 if (!PACKET_get_net_3(pkt, &cert_len)
1204 || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
1205 al = SSL_AD_DECODE_ERROR;
1206 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1207 SSL_R_CERT_LENGTH_MISMATCH);
1211 certstart = certbytes;
1212 x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
1214 al = SSL_AD_BAD_CERTIFICATE;
1215 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
1218 if (certbytes != (certstart + cert_len)) {
1219 al = SSL_AD_DECODE_ERROR;
1220 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1221 SSL_R_CERT_LENGTH_MISMATCH);
1224 if (!sk_X509_push(sk, x)) {
1225 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1231 i = ssl_verify_cert_chain(s, sk);
1232 if ((s->verify_mode & SSL_VERIFY_PEER) && i <= 0) {
1233 al = ssl_verify_alarm_type(s->verify_result);
1234 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1235 SSL_R_CERTIFICATE_VERIFY_FAILED);
1238 ERR_clear_error(); /* but we keep s->verify_result */
1240 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
1241 al = SSL_AD_HANDSHAKE_FAILURE;
1245 s->session->peer_chain = sk;
1247 * Inconsistency alert: cert_chain does include the peer's certificate,
1248 * which we don't include in statem_srvr.c
1250 x = sk_X509_value(sk, 0);
1253 * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
1256 pkey = X509_get0_pubkey(x);
1258 if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
1261 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1262 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1266 i = ssl_cert_type(x, pkey);
1270 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1271 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1275 exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1276 if (exp_idx >= 0 && i != exp_idx
1277 && (exp_idx != SSL_PKEY_GOST_EC ||
1278 (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
1279 && i != SSL_PKEY_GOST01))) {
1281 al = SSL_AD_ILLEGAL_PARAMETER;
1282 SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
1283 SSL_R_WRONG_CERTIFICATE_TYPE);
1286 s->session->peer_type = i;
1288 X509_free(s->session->peer);
1290 s->session->peer = x;
1291 s->session->verify_result = s->verify_result;
1294 ret = MSG_PROCESS_CONTINUE_READING;
1298 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1300 ossl_statem_set_error(s);
1303 sk_X509_pop_free(sk, X509_free);
1307 static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al)
1309 #ifndef OPENSSL_NO_PSK
1310 PACKET psk_identity_hint;
1312 /* PSK ciphersuites are preceded by an identity hint */
1314 if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
1315 *al = SSL_AD_DECODE_ERROR;
1316 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH);
1321 * Store PSK identity hint for later use, hint is used in
1322 * tls_construct_client_key_exchange. Assume that the maximum length of
1323 * a PSK identity hint can be as long as the maximum length of a PSK
1326 if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
1327 *al = SSL_AD_HANDSHAKE_FAILURE;
1328 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG);
1332 if (PACKET_remaining(&psk_identity_hint) == 0) {
1333 OPENSSL_free(s->session->psk_identity_hint);
1334 s->session->psk_identity_hint = NULL;
1335 } else if (!PACKET_strndup(&psk_identity_hint,
1336 &s->session->psk_identity_hint)) {
1337 *al = SSL_AD_INTERNAL_ERROR;
1343 SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
1344 *al = SSL_AD_INTERNAL_ERROR;
1349 static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1351 #ifndef OPENSSL_NO_SRP
1352 PACKET prime, generator, salt, server_pub;
1354 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1355 || !PACKET_get_length_prefixed_2(pkt, &generator)
1356 || !PACKET_get_length_prefixed_1(pkt, &salt)
1357 || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
1358 *al = SSL_AD_DECODE_ERROR;
1359 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH);
1364 BN_bin2bn(PACKET_data(&prime),
1365 PACKET_remaining(&prime), NULL)) == NULL
1367 BN_bin2bn(PACKET_data(&generator),
1368 PACKET_remaining(&generator), NULL)) == NULL
1370 BN_bin2bn(PACKET_data(&salt),
1371 PACKET_remaining(&salt), NULL)) == NULL
1373 BN_bin2bn(PACKET_data(&server_pub),
1374 PACKET_remaining(&server_pub), NULL)) == NULL) {
1375 *al = SSL_AD_INTERNAL_ERROR;
1376 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
1380 if (!srp_verify_server_param(s, al)) {
1381 *al = SSL_AD_DECODE_ERROR;
1382 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
1386 /* We must check if there is a certificate */
1387 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA|SSL_aDSS))
1388 *pkey = X509_get0_pubkey(s->session->peer);
1392 SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
1393 *al = SSL_AD_INTERNAL_ERROR;
1398 static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1400 #ifndef OPENSSL_NO_DH
1401 PACKET prime, generator, pub_key;
1402 EVP_PKEY *peer_tmp = NULL;
1405 BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
1407 if (!PACKET_get_length_prefixed_2(pkt, &prime)
1408 || !PACKET_get_length_prefixed_2(pkt, &generator)
1409 || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
1410 *al = SSL_AD_DECODE_ERROR;
1411 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
1415 peer_tmp = EVP_PKEY_new();
1418 if (peer_tmp == NULL || dh == NULL) {
1419 *al = SSL_AD_INTERNAL_ERROR;
1420 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
1424 p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
1425 g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator),
1427 bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
1429 if (p == NULL || g == NULL || bnpub_key == NULL) {
1430 *al = SSL_AD_INTERNAL_ERROR;
1431 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1435 if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) {
1436 *al = SSL_AD_DECODE_ERROR;
1437 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
1441 if (!DH_set0_pqg(dh, p, NULL, g)) {
1442 *al = SSL_AD_INTERNAL_ERROR;
1443 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1448 if (!DH_set0_key(dh, bnpub_key, NULL)) {
1449 *al = SSL_AD_INTERNAL_ERROR;
1450 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
1455 if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
1456 *al = SSL_AD_HANDSHAKE_FAILURE;
1457 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
1461 if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
1462 *al = SSL_AD_INTERNAL_ERROR;
1463 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
1467 s->s3->peer_tmp = peer_tmp;
1470 * FIXME: This makes assumptions about which ciphersuites come with
1471 * public keys. We should have a less ad-hoc way of doing this
1473 if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA|SSL_aDSS))
1474 *pkey = X509_get0_pubkey(s->session->peer);
1475 /* else anonymous DH, so no certificate or pkey. */
1484 EVP_PKEY_free(peer_tmp);
1488 SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
1489 *al = SSL_AD_INTERNAL_ERROR;
1494 static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
1496 #ifndef OPENSSL_NO_EC
1498 const unsigned char *ecparams;
1500 unsigned int curve_flags;
1501 EVP_PKEY_CTX *pctx = NULL;
1504 * Extract elliptic curve parameters and the server's ephemeral ECDH
1505 * public key. For now we only support named (not generic) curves and
1506 * ECParameters in this case is just three bytes.
1508 if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
1509 *al = SSL_AD_DECODE_ERROR;
1510 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
1514 * Check curve is one of our preferences, if not server has sent an
1515 * invalid curve. ECParameters is 3 bytes.
1517 if (!tls1_check_curve(s, ecparams, 3)) {
1518 *al = SSL_AD_DECODE_ERROR;
1519 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
1523 curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
1525 if (curve_nid == 0) {
1526 *al = SSL_AD_INTERNAL_ERROR;
1527 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
1528 SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1532 if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
1533 EVP_PKEY *key = EVP_PKEY_new();
1535 if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
1536 *al = SSL_AD_INTERNAL_ERROR;
1537 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1541 s->s3->peer_tmp = key;
1543 /* Set up EVP_PKEY with named curve as parameters */
1544 pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
1546 || EVP_PKEY_paramgen_init(pctx) <= 0
1547 || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
1548 || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
1549 *al = SSL_AD_INTERNAL_ERROR;
1550 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
1551 EVP_PKEY_CTX_free(pctx);
1554 EVP_PKEY_CTX_free(pctx);
1558 if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
1559 *al = SSL_AD_DECODE_ERROR;
1560 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
1564 if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
1565 PACKET_data(&encoded_pt),
1566 PACKET_remaining(&encoded_pt))) {
1567 *al = SSL_AD_DECODE_ERROR;
1568 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
1573 * The ECC/TLS specification does not mention the use of DSA to sign
1574 * ECParameters in the server key exchange message. We do support RSA
1577 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
1578 *pkey = X509_get0_pubkey(s->session->peer);
1579 else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
1580 *pkey = X509_get0_pubkey(s->session->peer);
1581 /* else anonymous ECDH, so no certificate or pkey. */
1585 SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
1586 *al = SSL_AD_INTERNAL_ERROR;
1591 MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
1595 EVP_PKEY *pkey = NULL;
1596 PACKET save_param_start, signature;
1598 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1600 save_param_start = *pkt;
1602 #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
1603 EVP_PKEY_free(s->s3->peer_tmp);
1604 s->s3->peer_tmp = NULL;
1607 if (alg_k & SSL_PSK) {
1608 if (!tls_process_ske_psk_preamble(s, pkt, &al))
1612 /* Nothing else to do for plain PSK or RSAPSK */
1613 if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
1614 } else if (alg_k & SSL_kSRP) {
1615 if (!tls_process_ske_srp(s, pkt, &pkey, &al))
1617 } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
1618 if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
1620 } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
1621 if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
1624 al = SSL_AD_UNEXPECTED_MESSAGE;
1625 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1629 /* if it was signed, check the signature */
1633 const EVP_MD *md = NULL;
1637 * |pkt| now points to the beginning of the signature, so the difference
1638 * equals the length of the parameters.
1640 if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
1641 PACKET_remaining(&save_param_start) -
1642 PACKET_remaining(pkt))) {
1643 al = SSL_AD_INTERNAL_ERROR;
1644 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1648 if (SSL_USE_SIGALGS(s)) {
1649 const unsigned char *sigalgs;
1651 if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
1652 al = SSL_AD_DECODE_ERROR;
1653 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
1656 rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
1658 al = SSL_AD_INTERNAL_ERROR;
1660 } else if (rv == 0) {
1661 al = SSL_AD_DECODE_ERROR;
1665 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1667 } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
1668 md = EVP_md5_sha1();
1673 if (!PACKET_get_length_prefixed_2(pkt, &signature)
1674 || PACKET_remaining(pkt) != 0) {
1675 al = SSL_AD_DECODE_ERROR;
1676 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
1679 maxsig = EVP_PKEY_size(pkey);
1681 al = SSL_AD_INTERNAL_ERROR;
1682 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1687 * Check signature length
1689 if (PACKET_remaining(&signature) > (size_t)maxsig) {
1690 /* wrong packet length */
1691 al = SSL_AD_DECODE_ERROR;
1692 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
1696 md_ctx = EVP_MD_CTX_new();
1697 if (md_ctx == NULL) {
1698 al = SSL_AD_INTERNAL_ERROR;
1699 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1703 if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
1704 || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
1705 SSL3_RANDOM_SIZE) <= 0
1706 || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
1707 SSL3_RANDOM_SIZE) <= 0
1708 || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
1709 PACKET_remaining(¶ms)) <= 0) {
1710 EVP_MD_CTX_free(md_ctx);
1711 al = SSL_AD_INTERNAL_ERROR;
1712 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
1715 if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
1716 PACKET_remaining(&signature), pkey) <= 0) {
1718 EVP_MD_CTX_free(md_ctx);
1719 al = SSL_AD_DECRYPT_ERROR;
1720 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
1723 EVP_MD_CTX_free(md_ctx);
1725 /* aNULL, aSRP or PSK do not need public keys */
1726 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
1727 && !(alg_k & SSL_PSK)) {
1728 /* Might be wrong key type, check it */
1729 if (ssl3_check_cert_and_algorithm(s)) {
1730 /* Otherwise this shouldn't happen */
1731 al = SSL_AD_INTERNAL_ERROR;
1732 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1734 al = SSL_AD_DECODE_ERROR;
1738 /* still data left over */
1739 if (PACKET_remaining(pkt) != 0) {
1740 al = SSL_AD_DECODE_ERROR;
1741 SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
1746 return MSG_PROCESS_CONTINUE_READING;
1749 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1750 ossl_statem_set_error(s);
1751 return MSG_PROCESS_ERROR;
1754 MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
1756 int ret = MSG_PROCESS_ERROR;
1757 unsigned int list_len, ctype_num, i, name_len;
1758 X509_NAME *xn = NULL;
1759 const unsigned char *data;
1760 const unsigned char *namestart, *namebytes;
1761 STACK_OF(X509_NAME) *ca_sk = NULL;
1763 if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
1764 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1768 /* get the certificate types */
1769 if (!PACKET_get_1(pkt, &ctype_num)
1770 || !PACKET_get_bytes(pkt, &data, ctype_num)) {
1771 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1772 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1775 OPENSSL_free(s->cert->ctypes);
1776 s->cert->ctypes = NULL;
1777 if (ctype_num > SSL3_CT_NUMBER) {
1778 /* If we exceed static buffer copy all to cert structure */
1779 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1780 if (s->cert->ctypes == NULL) {
1781 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1784 memcpy(s->cert->ctypes, data, ctype_num);
1785 s->cert->ctype_num = (size_t)ctype_num;
1786 ctype_num = SSL3_CT_NUMBER;
1788 for (i = 0; i < ctype_num; i++)
1789 s->s3->tmp.ctype[i] = data[i];
1791 if (SSL_USE_SIGALGS(s)) {
1792 if (!PACKET_get_net_2(pkt, &list_len)
1793 || !PACKET_get_bytes(pkt, &data, list_len)) {
1794 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1795 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1796 SSL_R_LENGTH_MISMATCH);
1800 /* Clear certificate digests and validity flags */
1801 for (i = 0; i < SSL_PKEY_NUM; i++) {
1802 s->s3->tmp.md[i] = NULL;
1803 s->s3->tmp.valid_flags[i] = 0;
1805 if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
1806 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1807 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1808 SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1811 if (!tls1_process_sigalgs(s)) {
1812 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
1813 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1817 ssl_set_default_md(s);
1820 /* get the CA RDNs */
1821 if (!PACKET_get_net_2(pkt, &list_len)
1822 || PACKET_remaining(pkt) != list_len) {
1823 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1824 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
1828 while (PACKET_remaining(pkt)) {
1829 if (!PACKET_get_net_2(pkt, &name_len)
1830 || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
1831 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1832 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1833 SSL_R_LENGTH_MISMATCH);
1837 namestart = namebytes;
1839 if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
1840 name_len)) == NULL) {
1841 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1842 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
1846 if (namebytes != (namestart + name_len)) {
1847 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
1848 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
1849 SSL_R_CA_DN_LENGTH_MISMATCH);
1852 if (!sk_X509_NAME_push(ca_sk, xn)) {
1853 SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
1859 /* we should setup a certificate to return.... */
1860 s->s3->tmp.cert_req = 1;
1861 s->s3->tmp.ctype_num = ctype_num;
1862 sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
1863 s->s3->tmp.ca_names = ca_sk;
1866 ret = MSG_PROCESS_CONTINUE_PROCESSING;
1869 ossl_statem_set_error(s);
1872 sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
1876 static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
1878 return (X509_NAME_cmp(*a, *b));
1881 MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
1884 unsigned int ticklen;
1885 unsigned long ticket_lifetime_hint;
1887 if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
1888 || !PACKET_get_net_2(pkt, &ticklen)
1889 || PACKET_remaining(pkt) != ticklen) {
1890 al = SSL_AD_DECODE_ERROR;
1891 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1895 /* Server is allowed to change its mind and send an empty ticket. */
1897 return MSG_PROCESS_CONTINUE_READING;
1899 if (s->session->session_id_length > 0) {
1900 int i = s->session_ctx->session_cache_mode;
1901 SSL_SESSION *new_sess;
1903 * We reused an existing session, so we need to replace it with a new
1906 if (i & SSL_SESS_CACHE_CLIENT) {
1908 * Remove the old session from the cache. We carry on if this fails
1910 SSL_CTX_remove_session(s->session_ctx, s->session);
1913 if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
1914 al = SSL_AD_INTERNAL_ERROR;
1915 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1919 SSL_SESSION_free(s->session);
1920 s->session = new_sess;
1923 OPENSSL_free(s->session->tlsext_tick);
1924 s->session->tlsext_ticklen = 0;
1926 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
1927 if (s->session->tlsext_tick == NULL) {
1928 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
1931 if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
1932 al = SSL_AD_DECODE_ERROR;
1933 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
1937 s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
1938 s->session->tlsext_ticklen = ticklen;
1940 * There are two ways to detect a resumed ticket session. One is to set
1941 * an appropriate session ID and then the server must return a match in
1942 * ServerHello. This allows the normal client session ID matching to work
1943 * and we know much earlier that the ticket has been accepted. The
1944 * other way is to set zero length session ID when the ticket is
1945 * presented and rely on the handshake to determine session resumption.
1946 * We choose the former approach because this fits in with assumptions
1947 * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
1948 * SHA256 is disabled) hash of the ticket.
1950 if (!EVP_Digest(s->session->tlsext_tick, ticklen,
1951 s->session->session_id, &s->session->session_id_length,
1952 EVP_sha256(), NULL)) {
1953 SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
1956 return MSG_PROCESS_CONTINUE_READING;
1958 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1960 ossl_statem_set_error(s);
1961 return MSG_PROCESS_ERROR;
1964 MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
1967 unsigned long resplen;
1970 if (!PACKET_get_1(pkt, &type)
1971 || type != TLSEXT_STATUSTYPE_ocsp) {
1972 al = SSL_AD_DECODE_ERROR;
1973 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
1976 if (!PACKET_get_net_3(pkt, &resplen)
1977 || PACKET_remaining(pkt) != resplen) {
1978 al = SSL_AD_DECODE_ERROR;
1979 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1982 s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
1983 if (s->tlsext_ocsp_resp == NULL) {
1984 al = SSL_AD_INTERNAL_ERROR;
1985 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
1988 if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
1989 al = SSL_AD_DECODE_ERROR;
1990 SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
1993 s->tlsext_ocsp_resplen = resplen;
1994 return MSG_PROCESS_CONTINUE_READING;
1996 ssl3_send_alert(s, SSL3_AL_FATAL, al);
1997 ossl_statem_set_error(s);
1998 return MSG_PROCESS_ERROR;
2001 MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
2003 if (PACKET_remaining(pkt) > 0) {
2004 /* should contain no data */
2005 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
2006 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
2007 ossl_statem_set_error(s);
2008 return MSG_PROCESS_ERROR;
2011 #ifndef OPENSSL_NO_SRP
2012 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
2013 if (SRP_Calc_A_param(s) <= 0) {
2014 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
2015 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2016 ossl_statem_set_error(s);
2017 return MSG_PROCESS_ERROR;
2023 * at this point we check that we have the required stuff from
2026 if (!ssl3_check_cert_and_algorithm(s)) {
2027 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2028 ossl_statem_set_error(s);
2029 return MSG_PROCESS_ERROR;
2033 * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
2034 * |tlsext_ocsp_resplen| values will be set if we actually received a status
2035 * message, or NULL and -1 otherwise
2037 if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
2039 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2041 ssl3_send_alert(s, SSL3_AL_FATAL,
2042 SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
2043 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
2044 SSL_R_INVALID_STATUS_RESPONSE);
2045 return MSG_PROCESS_ERROR;
2048 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2049 SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
2050 return MSG_PROCESS_ERROR;
2054 #ifndef OPENSSL_NO_CT
2055 if (s->ct_validation_callback != NULL) {
2056 /* Note we validate the SCTs whether or not we abort on error */
2057 if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
2058 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2059 return MSG_PROCESS_ERROR;
2064 #ifndef OPENSSL_NO_SCTP
2065 /* Only applies to renegotiation */
2066 if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
2067 && s->renegotiate != 0)
2068 return MSG_PROCESS_CONTINUE_PROCESSING;
2071 return MSG_PROCESS_FINISHED_READING;
2074 static int tls_construct_cke_psk_preamble(SSL *s, unsigned char **p,
2075 size_t *pskhdrlen, int *al)
2077 #ifndef OPENSSL_NO_PSK
2080 * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
2081 * \0-terminated identity. The last byte is for us for simulating
2084 char identity[PSK_MAX_IDENTITY_LEN + 1];
2085 size_t identitylen = 0;
2086 unsigned char psk[PSK_MAX_PSK_LEN];
2087 unsigned char *tmppsk = NULL;
2088 char *tmpidentity = NULL;
2091 if (s->psk_client_callback == NULL) {
2092 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
2093 *al = SSL_AD_INTERNAL_ERROR;
2097 memset(identity, 0, sizeof(identity));
2099 psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
2100 identity, sizeof(identity) - 1,
2103 if (psklen > PSK_MAX_PSK_LEN) {
2104 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2105 *al = SSL_AD_HANDSHAKE_FAILURE;
2107 } else if (psklen == 0) {
2108 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
2109 SSL_R_PSK_IDENTITY_NOT_FOUND);
2110 *al = SSL_AD_HANDSHAKE_FAILURE;
2114 identitylen = strlen(identity);
2115 if (identitylen > PSK_MAX_IDENTITY_LEN) {
2116 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2117 *al = SSL_AD_HANDSHAKE_FAILURE;
2121 tmppsk = OPENSSL_memdup(psk, psklen);
2122 tmpidentity = OPENSSL_strdup(identity);
2123 if (tmppsk == NULL || tmpidentity == NULL) {
2124 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
2125 *al = SSL_AD_INTERNAL_ERROR;
2129 OPENSSL_free(s->s3->tmp.psk);
2130 s->s3->tmp.psk = tmppsk;
2131 s->s3->tmp.psklen = psklen;
2133 OPENSSL_free(s->session->psk_identity);
2134 s->session->psk_identity = tmpidentity;
2136 s2n(identitylen, *p);
2137 memcpy(*p, identity, identitylen);
2138 *pskhdrlen = 2 + identitylen;
2144 OPENSSL_cleanse(psk, psklen);
2145 OPENSSL_cleanse(identity, sizeof(identity));
2146 OPENSSL_clear_free(tmppsk, psklen);
2147 OPENSSL_clear_free(tmpidentity, identitylen);
2151 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
2152 *al = SSL_AD_INTERNAL_ERROR;
2157 static int tls_construct_cke_rsa(SSL *s, unsigned char **p, int *len, int *al)
2159 #ifndef OPENSSL_NO_RSA
2161 EVP_PKEY *pkey = NULL;
2162 EVP_PKEY_CTX *pctx = NULL;
2164 unsigned char *pms = NULL;
2167 if (s->session->peer == NULL) {
2169 * We should always have a server certificate with SSL_kRSA.
2171 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2175 pkey = X509_get0_pubkey(s->session->peer);
2176 if (EVP_PKEY_get0_RSA(pkey) == NULL) {
2177 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2181 pmslen = SSL_MAX_MASTER_KEY_LENGTH;
2182 pms = OPENSSL_malloc(pmslen);
2184 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
2185 *al = SSL_AD_INTERNAL_ERROR;
2189 pms[0] = s->client_version >> 8;
2190 pms[1] = s->client_version & 0xff;
2191 if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
2196 /* Fix buf for TLS and beyond */
2197 if (s->version > SSL3_VERSION)
2199 pctx = EVP_PKEY_CTX_new(pkey, NULL);
2200 if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
2201 || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
2202 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
2205 if (EVP_PKEY_encrypt(pctx, *p, &enclen, pms, pmslen) <= 0) {
2206 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
2210 EVP_PKEY_CTX_free(pctx);
2213 if (s->options & SSL_OP_PKCS1_CHECK_1)
2215 if (s->options & SSL_OP_PKCS1_CHECK_2)
2219 /* Fix buf for TLS and beyond */
2220 if (s->version > SSL3_VERSION) {
2225 s->s3->tmp.pms = pms;
2226 s->s3->tmp.pmslen = pmslen;
2230 OPENSSL_clear_free(pms, pmslen);
2231 EVP_PKEY_CTX_free(pctx);
2235 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
2236 *al = SSL_AD_INTERNAL_ERROR;
2241 static int tls_construct_cke_dhe(SSL *s, unsigned char **p, int *len, int *al)
2243 #ifndef OPENSSL_NO_DH
2245 const BIGNUM *pub_key;
2246 EVP_PKEY *ckey = NULL, *skey = NULL;
2248 skey = s->s3->peer_tmp;
2250 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2253 ckey = ssl_generate_pkey(skey, NID_undef);
2254 dh_clnt = EVP_PKEY_get0_DH(ckey);
2256 if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) {
2257 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2258 EVP_PKEY_free(ckey);
2262 /* send off the data */
2263 DH_get0_key(dh_clnt, &pub_key, NULL);
2264 *len = BN_num_bytes(pub_key);
2266 BN_bn2bin(pub_key, *p);
2268 EVP_PKEY_free(ckey);
2272 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
2273 *al = SSL_AD_INTERNAL_ERROR;
2278 static int tls_construct_cke_ecdhe(SSL *s, unsigned char **p, int *len, int *al)
2280 #ifndef OPENSSL_NO_EC
2281 unsigned char *encodedPoint = NULL;
2282 int encoded_pt_len = 0;
2283 EVP_PKEY *ckey = NULL, *skey = NULL;
2285 skey = s->s3->peer_tmp;
2287 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2291 ckey = ssl_generate_pkey(skey, NID_undef);
2293 if (ssl_derive(s, ckey, skey) == 0) {
2294 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
2298 /* Generate encoding of client key */
2299 encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
2301 if (encoded_pt_len == 0) {
2302 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
2306 EVP_PKEY_free(ckey);
2309 *len = encoded_pt_len;
2311 /* length of encoded point */
2314 /* copy the point */
2315 memcpy(*p, encodedPoint, *len);
2316 /* increment len to account for length field */
2319 OPENSSL_free(encodedPoint);
2323 EVP_PKEY_free(ckey);
2326 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
2327 *al = SSL_AD_INTERNAL_ERROR;
2332 static int tls_construct_cke_gost(SSL *s, unsigned char **p, int *len, int *al)
2334 #ifndef OPENSSL_NO_GOST
2335 /* GOST key exchange message creation */
2336 EVP_PKEY_CTX *pkey_ctx = NULL;
2339 unsigned int md_len;
2340 unsigned char shared_ukm[32], tmp[256];
2341 EVP_MD_CTX *ukm_hash = NULL;
2342 int dgst_nid = NID_id_GostR3411_94;
2343 unsigned char *pms = NULL;
2346 if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
2347 dgst_nid = NID_id_GostR3411_2012_256;
2350 * Get server sertificate PKEY and create ctx from it
2352 peer_cert = s->session->peer;
2354 *al = SSL_AD_HANDSHAKE_FAILURE;
2355 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
2356 SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2360 pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
2361 if (pkey_ctx == NULL) {
2362 *al = SSL_AD_INTERNAL_ERROR;
2363 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2367 * If we have send a certificate, and certificate key
2368 * parameters match those of server certificate, use
2369 * certificate key for key exchange
2372 /* Otherwise, generate ephemeral key pair */
2374 pms = OPENSSL_malloc(pmslen);
2376 *al = SSL_AD_INTERNAL_ERROR;
2377 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
2381 if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
2382 /* Generate session key */
2383 || RAND_bytes(pms, pmslen) <= 0) {
2384 *al = SSL_AD_INTERNAL_ERROR;
2385 SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
2389 * If we have client certificate, use its secret as peer key
2391 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2392 if (EVP_PKEY_derive_set_peer
2393 (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,
2924 const SSL_CIPHER *c;
2926 int empty_reneg_info_scsv = !s->renegotiate;
2927 /* Set disabled masks for this session */
2928 ssl_set_client_disabled(s);
2934 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
2935 c = sk_SSL_CIPHER_value(sk, i);
2936 /* Skip disabled ciphers */
2937 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
2939 j = s->method->put_cipher_by_char(c, p);
2943 * If p == q, no ciphers; caller indicates an error. Otherwise, add
2947 if (empty_reneg_info_scsv) {
2948 static SSL_CIPHER scsv = {
2949 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2951 j = s->method->put_cipher_by_char(&scsv, p);
2954 if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
2955 static SSL_CIPHER scsv = {
2956 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
2958 j = s->method->put_cipher_by_char(&scsv, p);