1 /* ssl/s3_srvr.c -*- mode:C; c-file-style: "eay" -*- */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
151 #define REUSE_CIPHER_BUG
152 #define NETSCAPE_HANG_BUG
155 #include "ssl_locl.h"
156 #include "kssl_lcl.h"
157 #include <openssl/buffer.h>
158 #include <openssl/rand.h>
159 #include <openssl/objects.h>
160 #include <openssl/evp.h>
161 #include <openssl/hmac.h>
162 #include <openssl/x509.h>
163 #ifndef OPENSSL_NO_DH
164 #include <openssl/dh.h>
166 #include <openssl/bn.h>
167 #ifndef OPENSSL_NO_KRB5
168 #include <openssl/krb5_asn.h>
170 #include <openssl/md5.h>
172 static const SSL_METHOD *ssl3_get_server_method(int ver);
174 static const SSL_METHOD *ssl3_get_server_method(int ver)
176 if (ver == SSL3_VERSION)
177 return(SSLv3_server_method());
182 #ifndef OPENSSL_NO_SRP
183 static int ssl_check_srp_ext_ClientHello(SSL *s, int *al)
185 int ret = SSL_ERROR_NONE;
187 *al = SSL_AD_UNRECOGNIZED_NAME;
189 if ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) &&
190 (s->srp_ctx.TLS_ext_srp_username_callback != NULL))
192 if(s->srp_ctx.login == NULL)
194 /* RFC 5054 says SHOULD reject,
195 we do so if There is no srp login name */
197 *al = SSL_AD_UNKNOWN_PSK_IDENTITY;
201 ret = SSL_srp_server_param_with_username(s,al);
208 IMPLEMENT_ssl3_meth_func(SSLv3_server_method,
210 ssl_undefined_function,
211 ssl3_get_server_method)
213 int ssl3_accept(SSL *s)
216 unsigned long alg_k,Time=(unsigned long)time(NULL);
217 void (*cb)(const SSL *ssl,int type,int val)=NULL;
219 int new_state,state,skip=0;
221 RAND_add(&Time,sizeof(Time),0);
225 if (s->info_callback != NULL)
227 else if (s->ctx->info_callback != NULL)
228 cb=s->ctx->info_callback;
230 /* init things to blank */
232 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
236 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
240 #ifndef OPENSSL_NO_HEARTBEATS
241 /* If we're awaiting a HeartbeatResponse, pretend we
242 * already got and don't await it anymore, because
243 * Heartbeats don't make sense during handshakes anyway.
245 if (s->tlsext_hb_pending)
247 s->tlsext_hb_pending = 0;
258 case SSL_ST_RENEGOTIATE:
260 /* s->state=SSL_ST_ACCEPT; */
264 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
265 case SSL_ST_OK|SSL_ST_ACCEPT:
268 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
270 if ((s->version>>8) != 3)
272 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
275 s->type=SSL_ST_ACCEPT;
277 if (s->init_buf == NULL)
279 if ((buf=BUF_MEM_new()) == NULL)
284 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
292 if (!ssl3_setup_buffers(s))
299 s->s3->flags &= ~SSL3_FLAGS_SGC_RESTART_DONE;
301 if (s->state != SSL_ST_RENEGOTIATE)
303 /* Ok, we now need to push on a buffering BIO so that
304 * the output is sent in a way that TCP likes :-)
306 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
308 ssl3_init_finished_mac(s);
309 s->state=SSL3_ST_SR_CLNT_HELLO_A;
310 s->ctx->stats.sess_accept++;
312 else if (!s->s3->send_connection_binding &&
313 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
315 /* Server attempting to renegotiate with
316 * client that doesn't support secure
319 SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
320 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
326 /* s->state == SSL_ST_RENEGOTIATE,
327 * we will just send a HelloRequest */
328 s->ctx->stats.sess_accept_renegotiate++;
329 s->state=SSL3_ST_SW_HELLO_REQ_A;
333 case SSL3_ST_SW_HELLO_REQ_A:
334 case SSL3_ST_SW_HELLO_REQ_B:
337 ret=ssl3_send_hello_request(s);
338 if (ret <= 0) goto end;
339 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
340 s->state=SSL3_ST_SW_FLUSH;
343 ssl3_init_finished_mac(s);
346 case SSL3_ST_SW_HELLO_REQ_C:
350 case SSL3_ST_SR_CLNT_HELLO_A:
351 case SSL3_ST_SR_CLNT_HELLO_B:
352 case SSL3_ST_SR_CLNT_HELLO_C:
355 if (s->rwstate != SSL_X509_LOOKUP)
357 ret=ssl3_get_client_hello(s);
358 if (ret <= 0) goto end;
360 #ifndef OPENSSL_NO_SRP
363 if ((ret = ssl_check_srp_ext_ClientHello(s,&al)) < 0)
365 /* callback indicates firther work to be done */
366 s->rwstate=SSL_X509_LOOKUP;
369 if (ret != SSL_ERROR_NONE)
371 ssl3_send_alert(s,SSL3_AL_FATAL,al);
372 /* This is not really an error but the only means to
373 for a client to detect whether srp is supported. */
374 if (al != TLS1_AD_UNKNOWN_PSK_IDENTITY)
375 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLSEXT);
376 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
384 s->state=SSL3_ST_SW_SRVR_HELLO_A;
388 case SSL3_ST_SW_SRVR_HELLO_A:
389 case SSL3_ST_SW_SRVR_HELLO_B:
390 ret=ssl3_send_server_hello(s);
391 if (ret <= 0) goto end;
392 #ifndef OPENSSL_NO_TLSEXT
395 if (s->tlsext_ticket_expected)
396 s->state=SSL3_ST_SW_SESSION_TICKET_A;
398 s->state=SSL3_ST_SW_CHANGE_A;
402 s->state=SSL3_ST_SW_CHANGE_A;
405 s->state=SSL3_ST_SW_CERT_A;
409 case SSL3_ST_SW_CERT_A:
410 case SSL3_ST_SW_CERT_B:
411 /* Check if it is anon DH or anon ECDH, */
412 /* normal PSK or KRB5 or SRP */
413 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
414 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
415 && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
417 ret=ssl3_send_server_certificate(s);
418 if (ret <= 0) goto end;
419 #ifndef OPENSSL_NO_TLSEXT
420 if (s->tlsext_status_expected)
421 s->state=SSL3_ST_SW_CERT_STATUS_A;
423 s->state=SSL3_ST_SW_KEY_EXCH_A;
428 s->state=SSL3_ST_SW_KEY_EXCH_A;
435 s->state=SSL3_ST_SW_KEY_EXCH_A;
440 case SSL3_ST_SW_KEY_EXCH_A:
441 case SSL3_ST_SW_KEY_EXCH_B:
442 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
444 /* clear this, it may get reset by
445 * send_server_key_exchange */
446 if ((s->options & SSL_OP_EPHEMERAL_RSA)
447 #ifndef OPENSSL_NO_KRB5
448 && !(alg_k & SSL_kKRB5)
449 #endif /* OPENSSL_NO_KRB5 */
451 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
452 * even when forbidden by protocol specs
453 * (handshake may fail as clients are not required to
454 * be able to handle this) */
455 s->s3->tmp.use_rsa_tmp=1;
457 s->s3->tmp.use_rsa_tmp=0;
460 /* only send if a DH key exchange, fortezza or
461 * RSA but we have a sign only certificate
463 * PSK: may send PSK identity hints
465 * For ECC ciphersuites, we send a serverKeyExchange
466 * message only if the cipher suite is either
467 * ECDH-anon or ECDHE. In other cases, the
468 * server certificate contains the server's
469 * public key for key exchange.
471 if (s->s3->tmp.use_rsa_tmp
472 /* PSK: send ServerKeyExchange if PSK identity
473 * hint if provided */
474 #ifndef OPENSSL_NO_PSK
475 || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint)
477 #ifndef OPENSSL_NO_SRP
478 /* SRP: send ServerKeyExchange */
479 || (alg_k & SSL_kSRP)
481 || (alg_k & (SSL_kDHr|SSL_kDHd|SSL_kEDH))
482 || (alg_k & SSL_kEECDH)
483 || ((alg_k & SSL_kRSA)
484 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
485 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
486 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
492 ret=ssl3_send_server_key_exchange(s);
493 if (ret <= 0) goto end;
498 s->state=SSL3_ST_SW_CERT_REQ_A;
502 case SSL3_ST_SW_CERT_REQ_A:
503 case SSL3_ST_SW_CERT_REQ_B:
504 if (/* don't request cert unless asked for it: */
505 !(s->verify_mode & SSL_VERIFY_PEER) ||
506 /* if SSL_VERIFY_CLIENT_ONCE is set,
507 * don't request cert during re-negotiation: */
508 ((s->session->peer != NULL) &&
509 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
510 /* never request cert in anonymous ciphersuites
511 * (see section "Certificate request" in SSL 3 drafts
512 * and in RFC 2246): */
513 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
514 /* ... except when the application insists on verification
515 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
516 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
517 /* never request cert in Kerberos ciphersuites */
518 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)
519 /* With normal PSK Certificates and
520 * Certificate Requests are omitted */
521 || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
523 /* no cert request */
525 s->s3->tmp.cert_request=0;
526 s->state=SSL3_ST_SW_SRVR_DONE_A;
527 if (s->s3->handshake_buffer)
528 if (!ssl3_digest_cached_records(s))
533 s->s3->tmp.cert_request=1;
534 ret=ssl3_send_certificate_request(s);
535 if (ret <= 0) goto end;
536 #ifndef NETSCAPE_HANG_BUG
537 s->state=SSL3_ST_SW_SRVR_DONE_A;
539 s->state=SSL3_ST_SW_FLUSH;
540 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
546 case SSL3_ST_SW_SRVR_DONE_A:
547 case SSL3_ST_SW_SRVR_DONE_B:
548 ret=ssl3_send_server_done(s);
549 if (ret <= 0) goto end;
550 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
551 s->state=SSL3_ST_SW_FLUSH;
555 case SSL3_ST_SW_FLUSH:
557 /* This code originally checked to see if
558 * any data was pending using BIO_CTRL_INFO
559 * and then flushed. This caused problems
560 * as documented in PR#1939. The proposed
561 * fix doesn't completely resolve this issue
562 * as buggy implementations of BIO_CTRL_PENDING
563 * still exist. So instead we just flush
567 s->rwstate=SSL_WRITING;
568 if (BIO_flush(s->wbio) <= 0)
573 s->rwstate=SSL_NOTHING;
575 s->state=s->s3->tmp.next_state;
578 case SSL3_ST_SR_CERT_A:
579 case SSL3_ST_SR_CERT_B:
580 /* Check for second client hello (MS SGC) */
581 ret = ssl3_check_client_hello(s);
585 s->state = SSL3_ST_SR_CLNT_HELLO_C;
587 if (s->s3->tmp.cert_request)
589 ret=ssl3_get_client_certificate(s);
590 if (ret <= 0) goto end;
593 s->state=SSL3_ST_SR_KEY_EXCH_A;
597 case SSL3_ST_SR_KEY_EXCH_A:
598 case SSL3_ST_SR_KEY_EXCH_B:
599 ret=ssl3_get_client_key_exchange(s);
604 /* For the ECDH ciphersuites when
605 * the client sends its ECDH pub key in
606 * a certificate, the CertificateVerify
607 * message is not sent.
608 * Also for GOST ciphersuites when
609 * the client uses its key from the certificate
612 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
613 s->state=SSL3_ST_SR_FINISHED_A;
615 if (s->s3->next_proto_neg_seen)
616 s->state=SSL3_ST_SR_NEXT_PROTO_A;
618 s->state=SSL3_ST_SR_FINISHED_A;
622 else if (TLS1_get_version(s) >= TLS1_2_VERSION)
624 s->state=SSL3_ST_SR_CERT_VRFY_A;
626 if (!s->session->peer)
628 /* For TLS v1.2 freeze the handshake buffer
629 * at this point and digest cached records.
631 if (!s->s3->handshake_buffer)
633 SSLerr(SSL_F_SSL3_ACCEPT,ERR_R_INTERNAL_ERROR);
636 s->s3->flags |= TLS1_FLAGS_KEEP_HANDSHAKE;
637 if (!ssl3_digest_cached_records(s))
645 s->state=SSL3_ST_SR_CERT_VRFY_A;
648 /* We need to get hashes here so if there is
649 * a client cert, it can be verified
650 * FIXME - digest processing for CertificateVerify
651 * should be generalized. But it is next step
653 if (s->s3->handshake_buffer)
654 if (!ssl3_digest_cached_records(s))
656 for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++)
657 if (s->s3->handshake_dgst[dgst_num])
661 s->method->ssl3_enc->cert_verify_mac(s,EVP_MD_CTX_type(s->s3->handshake_dgst[dgst_num]),&(s->s3->tmp.cert_verify_md[offset]));
662 dgst_size=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]);
673 case SSL3_ST_SR_CERT_VRFY_A:
674 case SSL3_ST_SR_CERT_VRFY_B:
676 s->s3->flags |= SSL3_FLAGS_CCS_OK;
677 /* we should decide if we expected this one */
678 ret=ssl3_get_cert_verify(s);
679 if (ret <= 0) goto end;
681 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
682 s->state=SSL3_ST_SR_FINISHED_A;
684 if (s->s3->next_proto_neg_seen)
685 s->state=SSL3_ST_SR_NEXT_PROTO_A;
687 s->state=SSL3_ST_SR_FINISHED_A;
692 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
693 case SSL3_ST_SR_NEXT_PROTO_A:
694 case SSL3_ST_SR_NEXT_PROTO_B:
695 ret=ssl3_get_next_proto(s);
696 if (ret <= 0) goto end;
698 s->state=SSL3_ST_SR_FINISHED_A;
702 case SSL3_ST_SR_FINISHED_A:
703 case SSL3_ST_SR_FINISHED_B:
704 s->s3->flags |= SSL3_FLAGS_CCS_OK;
705 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
706 SSL3_ST_SR_FINISHED_B);
707 if (ret <= 0) goto end;
710 #ifndef OPENSSL_NO_TLSEXT
711 else if (s->tlsext_ticket_expected)
712 s->state=SSL3_ST_SW_SESSION_TICKET_A;
715 s->state=SSL3_ST_SW_CHANGE_A;
719 #ifndef OPENSSL_NO_TLSEXT
720 case SSL3_ST_SW_SESSION_TICKET_A:
721 case SSL3_ST_SW_SESSION_TICKET_B:
722 ret=ssl3_send_newsession_ticket(s);
723 if (ret <= 0) goto end;
724 s->state=SSL3_ST_SW_CHANGE_A;
728 case SSL3_ST_SW_CERT_STATUS_A:
729 case SSL3_ST_SW_CERT_STATUS_B:
730 ret=ssl3_send_cert_status(s);
731 if (ret <= 0) goto end;
732 s->state=SSL3_ST_SW_KEY_EXCH_A;
738 case SSL3_ST_SW_CHANGE_A:
739 case SSL3_ST_SW_CHANGE_B:
741 s->session->cipher=s->s3->tmp.new_cipher;
742 if (!s->method->ssl3_enc->setup_key_block(s))
743 { ret= -1; goto end; }
745 ret=ssl3_send_change_cipher_spec(s,
746 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
748 if (ret <= 0) goto end;
749 s->state=SSL3_ST_SW_FINISHED_A;
752 if (!s->method->ssl3_enc->change_cipher_state(s,
753 SSL3_CHANGE_CIPHER_SERVER_WRITE))
761 case SSL3_ST_SW_FINISHED_A:
762 case SSL3_ST_SW_FINISHED_B:
763 ret=ssl3_send_finished(s,
764 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
765 s->method->ssl3_enc->server_finished_label,
766 s->method->ssl3_enc->server_finished_label_len);
767 if (ret <= 0) goto end;
768 s->state=SSL3_ST_SW_FLUSH;
771 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
772 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
774 if (s->s3->next_proto_neg_seen)
776 s->s3->flags |= SSL3_FLAGS_CCS_OK;
777 s->s3->tmp.next_state=SSL3_ST_SR_NEXT_PROTO_A;
780 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
784 s->s3->tmp.next_state=SSL_ST_OK;
789 /* clean a few things up */
790 ssl3_cleanup_key_block(s);
792 BUF_MEM_free(s->init_buf);
795 /* remove buffering on output */
796 ssl_free_wbio_buffer(s);
800 if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
805 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
807 s->ctx->stats.sess_accept_good++;
809 s->handshake_func=ssl3_accept;
811 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
819 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
825 if (!s->s3->tmp.reuse_message && !skip)
829 if ((ret=BIO_flush(s->wbio)) <= 0)
834 if ((cb != NULL) && (s->state != state))
838 cb(s,SSL_CB_ACCEPT_LOOP,1);
845 /* BIO_flush(s->wbio); */
849 cb(s,SSL_CB_ACCEPT_EXIT,ret);
853 int ssl3_send_hello_request(SSL *s)
857 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
859 p=(unsigned char *)s->init_buf->data;
860 *(p++)=SSL3_MT_HELLO_REQUEST;
865 s->state=SSL3_ST_SW_HELLO_REQ_B;
866 /* number of bytes to write */
871 /* SSL3_ST_SW_HELLO_REQ_B */
872 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
875 int ssl3_check_client_hello(SSL *s)
880 /* this function is called when we really expect a Certificate message,
881 * so permit appropriate message length */
882 n=s->method->ssl_get_message(s,
888 if (!ok) return((int)n);
889 s->s3->tmp.reuse_message = 1;
890 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
892 /* We only allow the client to restart the handshake once per
894 if (s->s3->flags & SSL3_FLAGS_SGC_RESTART_DONE)
896 SSLerr(SSL_F_SSL3_CHECK_CLIENT_HELLO, SSL_R_MULTIPLE_SGC_RESTARTS);
899 /* Throw away what we have done so far in the current handshake,
900 * which will now be aborted. (A full SSL_clear would be too much.) */
901 #ifndef OPENSSL_NO_DH
902 if (s->s3->tmp.dh != NULL)
904 DH_free(s->s3->tmp.dh);
905 s->s3->tmp.dh = NULL;
908 #ifndef OPENSSL_NO_ECDH
909 if (s->s3->tmp.ecdh != NULL)
911 EC_KEY_free(s->s3->tmp.ecdh);
912 s->s3->tmp.ecdh = NULL;
915 s->s3->flags |= SSL3_FLAGS_SGC_RESTART_DONE;
921 int ssl3_get_client_hello(SSL *s)
923 int i,j,ok,al,ret= -1;
924 unsigned int cookie_len;
927 unsigned char *p,*d,*q;
929 #ifndef OPENSSL_NO_COMP
932 STACK_OF(SSL_CIPHER) *ciphers=NULL;
934 /* We do this so that we will respond with our native type.
935 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
936 * This down switching should be handled by a different method.
937 * If we are SSLv3, we will respond with SSLv3, even if prompted with
940 if (s->state == SSL3_ST_SR_CLNT_HELLO_A
943 s->state=SSL3_ST_SR_CLNT_HELLO_B;
946 n=s->method->ssl_get_message(s,
947 SSL3_ST_SR_CLNT_HELLO_B,
948 SSL3_ST_SR_CLNT_HELLO_C,
949 SSL3_MT_CLIENT_HELLO,
950 SSL3_RT_MAX_PLAIN_LENGTH,
953 if (!ok) return((int)n);
955 d=p=(unsigned char *)s->init_msg;
957 /* use version from inside client hello, not from record header
958 * (may differ: see RFC 2246, Appendix E, second paragraph) */
959 s->client_version=(((int)p[0])<<8)|(int)p[1];
962 if ((s->version == DTLS1_VERSION && s->client_version > s->version) ||
963 (s->version != DTLS1_VERSION && s->client_version < s->version))
965 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
966 if ((s->client_version>>8) == SSL3_VERSION_MAJOR &&
967 !s->enc_write_ctx && !s->write_hash)
969 /* similar to ssl3_get_record, send alert using remote version number */
970 s->version = s->client_version;
972 al = SSL_AD_PROTOCOL_VERSION;
976 /* If we require cookies and this ClientHello doesn't
977 * contain one, just return since we do not want to
978 * allocate any memory yet. So check cookie length...
980 if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)
982 unsigned int session_length, cookie_length;
984 session_length = *(p + SSL3_RANDOM_SIZE);
985 cookie_length = *(p + SSL3_RANDOM_SIZE + session_length + 1);
987 if (cookie_length == 0)
991 /* load the client random */
992 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
995 /* get the session-id */
999 /* Versions before 0.9.7 always allow clients to resume sessions in renegotiation.
1000 * 0.9.7 and later allow this by default, but optionally ignore resumption requests
1001 * with flag SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION (it's a new flag rather
1002 * than a change to default behavior so that applications relying on this for security
1003 * won't even compile against older library versions).
1005 * 1.0.1 and later also have a function SSL_renegotiate_abbreviated() to request
1006 * renegotiation but not a new session (s->new_session remains unset): for servers,
1007 * this essentially just means that the SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
1008 * setting will be ignored.
1010 if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
1012 if (!ssl_get_new_session(s,1))
1017 i=ssl_get_prev_session(s, p, j, d + n);
1019 { /* previous session */
1026 if (!ssl_get_new_session(s,1))
1033 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
1036 cookie_len = *(p++);
1039 * The ClientHello may contain a cookie even if the
1040 * HelloVerify message has not been sent--make sure that it
1041 * does not cause an overflow.
1043 if ( cookie_len > sizeof(s->d1->rcvd_cookie))
1046 al = SSL_AD_DECODE_ERROR;
1047 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
1051 /* verify the cookie if appropriate option is set. */
1052 if ((SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
1055 memcpy(s->d1->rcvd_cookie, p, cookie_len);
1057 if ( s->ctx->app_verify_cookie_cb != NULL)
1059 if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie,
1062 al=SSL_AD_HANDSHAKE_FAILURE;
1063 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
1064 SSL_R_COOKIE_MISMATCH);
1067 /* else cookie verification succeeded */
1069 else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie,
1070 s->d1->cookie_len) != 0) /* default verification */
1072 al=SSL_AD_HANDSHAKE_FAILURE;
1073 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
1074 SSL_R_COOKIE_MISMATCH);
1085 if ((i == 0) && (j != 0))
1087 /* we need a cipher if we are not resuming a session */
1088 al=SSL_AD_ILLEGAL_PARAMETER;
1089 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
1094 /* not enough data */
1095 al=SSL_AD_DECODE_ERROR;
1096 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
1099 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
1106 /* If it is a hit, check that the cipher is in the list */
1107 if ((s->hit) && (i > 0))
1110 id=s->session->cipher->id;
1113 printf("client sent %d ciphers\n",sk_num(ciphers));
1115 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
1117 c=sk_SSL_CIPHER_value(ciphers,i);
1119 printf("client [%2d of %2d]:%s\n",
1120 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
1128 /* Disabled because it can be used in a ciphersuite downgrade
1129 * attack: CVE-2010-4180.
1132 if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
1134 /* Special case as client bug workaround: the previously used cipher may
1135 * not be in the current list, the client instead might be trying to
1136 * continue using a cipher that before wasn't chosen due to server
1137 * preferences. We'll have to reject the connection if the cipher is not
1138 * enabled, though. */
1139 c = sk_SSL_CIPHER_value(ciphers, 0);
1140 if (sk_SSL_CIPHER_find(SSL_get_ciphers(s), c) >= 0)
1142 s->session->cipher = c;
1149 /* we need to have the cipher in the cipher
1150 * list if we are asked to reuse it */
1151 al=SSL_AD_ILLEGAL_PARAMETER;
1152 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
1161 /* not enough data */
1162 al=SSL_AD_DECODE_ERROR;
1163 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
1169 if (p[j] == 0) break;
1176 al=SSL_AD_DECODE_ERROR;
1177 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
1181 #ifndef OPENSSL_NO_TLSEXT
1183 if (s->version >= SSL3_VERSION)
1185 if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al))
1187 /* 'al' set by ssl_parse_clienthello_tlsext */
1188 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT);
1192 if (ssl_check_clienthello_tlsext_early(s) <= 0) {
1193 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
1197 /* Check if we want to use external pre-shared secret for this
1198 * handshake for not reused session only. We need to generate
1199 * server_random before calling tls_session_secret_cb in order to allow
1200 * SessionTicket processing to use it in key derivation. */
1203 pos=s->s3->server_random;
1204 if (ssl_fill_hello_random(s, 1, pos, SSL3_RANDOM_SIZE) <= 0)
1206 al=SSL_AD_INTERNAL_ERROR;
1211 if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1213 SSL_CIPHER *pref_cipher=NULL;
1215 s->session->master_key_length=sizeof(s->session->master_key);
1216 if(s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length,
1217 ciphers, &pref_cipher, s->tls_session_secret_cb_arg))
1220 s->session->ciphers=ciphers;
1221 s->session->verify_result=X509_V_OK;
1225 /* check if some cipher was preferred by call back */
1226 pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s));
1227 if (pref_cipher == NULL)
1229 al=SSL_AD_HANDSHAKE_FAILURE;
1230 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
1234 s->session->cipher=pref_cipher;
1237 sk_SSL_CIPHER_free(s->cipher_list);
1239 if (s->cipher_list_by_id)
1240 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1242 s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers);
1243 s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers);
1248 /* Worst case, we will use the NULL compression, but if we have other
1249 * options, we will now look for them. We have i-1 compression
1250 * algorithms from the client, starting at q. */
1251 s->s3->tmp.new_compression=NULL;
1252 #ifndef OPENSSL_NO_COMP
1253 /* This only happens if we have a cache hit */
1254 if (s->session->compress_meth != 0)
1256 int m, comp_id = s->session->compress_meth;
1257 /* Perform sanity checks on resumed compression algorithm */
1258 /* Can't disable compression */
1259 if (s->options & SSL_OP_NO_COMPRESSION)
1261 al=SSL_AD_INTERNAL_ERROR;
1262 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1265 /* Look for resumed compression method */
1266 for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++)
1268 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
1269 if (comp_id == comp->id)
1271 s->s3->tmp.new_compression=comp;
1275 if (s->s3->tmp.new_compression == NULL)
1277 al=SSL_AD_INTERNAL_ERROR;
1278 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INVALID_COMPRESSION_ALGORITHM);
1281 /* Look for resumed method in compression list */
1282 for (m = 0; m < i; m++)
1284 if (q[m] == comp_id)
1289 al=SSL_AD_ILLEGAL_PARAMETER;
1290 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING);
1296 else if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods)
1297 { /* See if we have a match */
1298 int m,nn,o,v,done=0;
1300 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
1301 for (m=0; m<nn; m++)
1303 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
1316 s->s3->tmp.new_compression=comp;
1321 /* If compression is disabled we'd better not try to resume a session
1322 * using compression.
1324 if (s->session->compress_meth != 0)
1326 al=SSL_AD_INTERNAL_ERROR;
1327 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1332 /* Given s->session->ciphers and SSL_get_ciphers, we must
1337 #ifdef OPENSSL_NO_COMP
1338 s->session->compress_meth=0;
1340 s->session->compress_meth=(comp == NULL)?0:comp->id;
1342 if (s->session->ciphers != NULL)
1343 sk_SSL_CIPHER_free(s->session->ciphers);
1344 s->session->ciphers=ciphers;
1345 if (ciphers == NULL)
1347 al=SSL_AD_ILLEGAL_PARAMETER;
1348 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
1352 c=ssl3_choose_cipher(s,s->session->ciphers,
1353 SSL_get_ciphers(s));
1357 al=SSL_AD_HANDSHAKE_FAILURE;
1358 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
1361 s->s3->tmp.new_cipher=c;
1365 /* Session-id reuse */
1366 #ifdef REUSE_CIPHER_BUG
1367 STACK_OF(SSL_CIPHER) *sk;
1368 SSL_CIPHER *nc=NULL;
1369 SSL_CIPHER *ec=NULL;
1371 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
1373 sk=s->session->ciphers;
1374 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1376 c=sk_SSL_CIPHER_value(sk,i);
1377 if (c->algorithm_enc & SSL_eNULL)
1379 if (SSL_C_IS_EXPORT(c))
1383 s->s3->tmp.new_cipher=nc;
1384 else if (ec != NULL)
1385 s->s3->tmp.new_cipher=ec;
1387 s->s3->tmp.new_cipher=s->session->cipher;
1391 s->s3->tmp.new_cipher=s->session->cipher;
1394 if (TLS1_get_version(s) < TLS1_2_VERSION || !(s->verify_mode & SSL_VERIFY_PEER))
1396 if (!ssl3_digest_cached_records(s))
1398 al = SSL_AD_INTERNAL_ERROR;
1403 /* we now have the following setup.
1405 * cipher_list - our prefered list of ciphers
1406 * ciphers - the clients prefered list of ciphers
1407 * compression - basically ignored right now
1408 * ssl version is set - sslv3
1409 * s->session - The ssl session has been setup.
1410 * s->hit - session reuse flag
1411 * s->tmp.new_cipher - the new cipher to use.
1414 /* Handles TLS extensions that we couldn't check earlier */
1415 if (s->version >= SSL3_VERSION)
1417 if (ssl_check_clienthello_tlsext_late(s) <= 0)
1419 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
1428 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1431 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
1435 int ssl3_send_server_hello(SSL *s)
1438 unsigned char *p,*d;
1442 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
1444 buf=(unsigned char *)s->init_buf->data;
1445 #ifdef OPENSSL_NO_TLSEXT
1446 p=s->s3->server_random;
1447 if (ssl_fill_hello_random(s, 1, p, SSL3_RANDOM_SIZE) <= 0)
1450 /* Do the message type and length last */
1453 *(p++)=s->version>>8;
1454 *(p++)=s->version&0xff;
1457 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
1458 p+=SSL3_RANDOM_SIZE;
1460 /* There are several cases for the session ID to send
1461 * back in the server hello:
1462 * - For session reuse from the session cache,
1463 * we send back the old session ID.
1464 * - If stateless session reuse (using a session ticket)
1465 * is successful, we send back the client's "session ID"
1466 * (which doesn't actually identify the session).
1467 * - If it is a new session, we send back the new
1469 * - However, if we want the new session to be single-use,
1470 * we send back a 0-length session ID.
1471 * s->hit is non-zero in either case of session reuse,
1472 * so the following won't overwrite an ID that we're supposed
1475 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)
1477 s->session->session_id_length=0;
1479 sl=s->session->session_id_length;
1480 if (sl > (int)sizeof(s->session->session_id))
1482 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1486 memcpy(p,s->session->session_id,sl);
1489 /* put the cipher */
1490 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
1493 /* put the compression method */
1494 #ifdef OPENSSL_NO_COMP
1497 if (s->s3->tmp.new_compression == NULL)
1500 *(p++)=s->s3->tmp.new_compression->id;
1502 #ifndef OPENSSL_NO_TLSEXT
1503 if (ssl_prepare_serverhello_tlsext(s) <= 0)
1505 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1508 if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
1510 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
1517 *(d++)=SSL3_MT_SERVER_HELLO;
1520 s->state=SSL3_ST_SW_SRVR_HELLO_B;
1521 /* number of bytes to write */
1526 /* SSL3_ST_SW_SRVR_HELLO_B */
1527 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1530 int ssl3_send_server_done(SSL *s)
1534 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
1536 p=(unsigned char *)s->init_buf->data;
1539 *(p++)=SSL3_MT_SERVER_DONE;
1544 s->state=SSL3_ST_SW_SRVR_DONE_B;
1545 /* number of bytes to write */
1550 /* SSL3_ST_SW_SRVR_DONE_B */
1551 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1554 int ssl3_send_server_key_exchange(SSL *s)
1556 #ifndef OPENSSL_NO_RSA
1560 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1563 #ifndef OPENSSL_NO_DH
1566 #ifndef OPENSSL_NO_ECDH
1567 EC_KEY *ecdh=NULL, *ecdhp;
1568 unsigned char *encodedPoint = NULL;
1571 BN_CTX *bn_ctx = NULL;
1574 const EVP_MD *md = NULL;
1575 unsigned char *p,*d;
1585 EVP_MD_CTX_init(&md_ctx);
1586 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1588 type=s->s3->tmp.new_cipher->algorithm_mkey;
1593 r[0]=r[1]=r[2]=r[3]=NULL;
1595 #ifndef OPENSSL_NO_RSA
1596 if (type & SSL_kRSA)
1599 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1601 rsa=s->cert->rsa_tmp_cb(s,
1602 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1603 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1606 al=SSL_AD_HANDSHAKE_FAILURE;
1607 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1615 al=SSL_AD_HANDSHAKE_FAILURE;
1616 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1621 s->s3->tmp.use_rsa_tmp=1;
1625 #ifndef OPENSSL_NO_DH
1626 if (type & SSL_kEDH)
1629 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1630 dhp=s->cert->dh_tmp_cb(s,
1631 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1632 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1635 al=SSL_AD_HANDSHAKE_FAILURE;
1636 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1640 if (s->s3->tmp.dh != NULL)
1642 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1646 if ((dh=DHparams_dup(dhp)) == NULL)
1648 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1653 if ((dhp->pub_key == NULL ||
1654 dhp->priv_key == NULL ||
1655 (s->options & SSL_OP_SINGLE_DH_USE)))
1657 if(!DH_generate_key(dh))
1659 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1666 dh->pub_key=BN_dup(dhp->pub_key);
1667 dh->priv_key=BN_dup(dhp->priv_key);
1668 if ((dh->pub_key == NULL) ||
1669 (dh->priv_key == NULL))
1671 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1681 #ifndef OPENSSL_NO_ECDH
1682 if (type & SSL_kEECDH)
1684 const EC_GROUP *group;
1686 ecdhp=cert->ecdh_tmp;
1687 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1689 ecdhp=s->cert->ecdh_tmp_cb(s,
1690 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1691 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1695 al=SSL_AD_HANDSHAKE_FAILURE;
1696 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1700 if (s->s3->tmp.ecdh != NULL)
1702 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1706 /* Duplicate the ECDH structure. */
1709 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1712 if ((ecdh = EC_KEY_dup(ecdhp)) == NULL)
1714 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1718 s->s3->tmp.ecdh=ecdh;
1719 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
1720 (EC_KEY_get0_private_key(ecdh) == NULL) ||
1721 (s->options & SSL_OP_SINGLE_ECDH_USE))
1723 if(!EC_KEY_generate_key(ecdh))
1725 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1730 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
1731 (EC_KEY_get0_public_key(ecdh) == NULL) ||
1732 (EC_KEY_get0_private_key(ecdh) == NULL))
1734 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1738 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1739 (EC_GROUP_get_degree(group) > 163))
1741 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1745 /* XXX: For now, we only support ephemeral ECDH
1746 * keys over named (not generic) curves. For
1747 * supported named curves, curve_id is non-zero.
1750 tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
1753 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1757 /* Encode the public key.
1758 * First check the size of encoding and
1759 * allocate memory accordingly.
1761 encodedlen = EC_POINT_point2oct(group,
1762 EC_KEY_get0_public_key(ecdh),
1763 POINT_CONVERSION_UNCOMPRESSED,
1766 encodedPoint = (unsigned char *)
1767 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1768 bn_ctx = BN_CTX_new();
1769 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1771 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1776 encodedlen = EC_POINT_point2oct(group,
1777 EC_KEY_get0_public_key(ecdh),
1778 POINT_CONVERSION_UNCOMPRESSED,
1779 encodedPoint, encodedlen, bn_ctx);
1781 if (encodedlen == 0)
1783 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1787 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1789 /* XXX: For now, we only support named (not
1790 * generic) curves in ECDH ephemeral key exchanges.
1791 * In this situation, we need four additional bytes
1792 * to encode the entire ServerECDHParams
1797 /* We'll generate the serverKeyExchange message
1798 * explicitly so we can set these to NULLs
1806 #endif /* !OPENSSL_NO_ECDH */
1807 #ifndef OPENSSL_NO_PSK
1808 if (type & SSL_kPSK)
1810 /* reserve size for record length and PSK identity hint*/
1811 n+=2+strlen(s->ctx->psk_identity_hint);
1814 #endif /* !OPENSSL_NO_PSK */
1815 #ifndef OPENSSL_NO_SRP
1816 if (type & SSL_kSRP)
1818 if ((s->srp_ctx.N == NULL) ||
1819 (s->srp_ctx.g == NULL) ||
1820 (s->srp_ctx.s == NULL) ||
1821 (s->srp_ctx.B == NULL))
1823 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_SRP_PARAM);
1834 al=SSL_AD_HANDSHAKE_FAILURE;
1835 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1838 for (i=0; i < 4 && r[i] != NULL; i++)
1840 nr[i]=BN_num_bytes(r[i]);
1841 #ifndef OPENSSL_NO_SRP
1842 if ((i == 2) && (type & SSL_kSRP))
1849 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1850 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
1852 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher,&md))
1855 al=SSL_AD_DECODE_ERROR;
1858 kn=EVP_PKEY_size(pkey);
1866 if (!BUF_MEM_grow_clean(buf,n+4+kn))
1868 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1871 d=(unsigned char *)s->init_buf->data;
1874 for (i=0; i < 4 && r[i] != NULL; i++)
1876 #ifndef OPENSSL_NO_SRP
1877 if ((i == 2) && (type & SSL_kSRP))
1889 #ifndef OPENSSL_NO_ECDH
1890 if (type & SSL_kEECDH)
1892 /* XXX: For now, we only support named (not generic) curves.
1893 * In this situation, the serverKeyExchange message has:
1894 * [1 byte CurveType], [2 byte CurveName]
1895 * [1 byte length of encoded point], followed by
1896 * the actual encoded point itself
1898 *p = NAMED_CURVE_TYPE;
1906 memcpy((unsigned char*)p,
1907 (unsigned char *)encodedPoint,
1909 OPENSSL_free(encodedPoint);
1910 encodedPoint = NULL;
1915 #ifndef OPENSSL_NO_PSK
1916 if (type & SSL_kPSK)
1918 /* copy PSK identity hint */
1919 s2n(strlen(s->ctx->psk_identity_hint), p);
1920 strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint));
1921 p+=strlen(s->ctx->psk_identity_hint);
1928 /* n is the length of the params, they start at &(d[4])
1929 * and p points to the space at the end. */
1930 #ifndef OPENSSL_NO_RSA
1931 if (pkey->type == EVP_PKEY_RSA
1932 && TLS1_get_version(s) < TLS1_2_VERSION)
1936 for (num=2; num > 0; num--)
1938 EVP_MD_CTX_set_flags(&md_ctx,
1939 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1940 EVP_DigestInit_ex(&md_ctx,(num == 2)
1941 ?s->ctx->md5:s->ctx->sha1, NULL);
1942 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1943 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1944 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1945 EVP_DigestFinal_ex(&md_ctx,q,
1946 (unsigned int *)&i);
1950 if (RSA_sign(NID_md5_sha1, md_buf, j,
1951 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1953 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1963 /* For TLS1.2 and later send signature
1965 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1967 if (!tls12_get_sigandhash(p, pkey, md))
1969 /* Should never happen */
1970 al=SSL_AD_INTERNAL_ERROR;
1971 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1977 fprintf(stderr, "Using hash %s\n",
1980 EVP_SignInit_ex(&md_ctx, md, NULL);
1981 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1982 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1983 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1984 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1985 (unsigned int *)&i,pkey))
1987 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_EVP);
1992 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1997 /* Is this error check actually needed? */
1998 al=SSL_AD_HANDSHAKE_FAILURE;
1999 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
2004 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
2007 /* we should now have things packed up, so lets send
2013 s->state = SSL3_ST_SW_KEY_EXCH_B;
2014 EVP_MD_CTX_cleanup(&md_ctx);
2015 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2017 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2019 #ifndef OPENSSL_NO_ECDH
2020 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2021 BN_CTX_free(bn_ctx);
2023 EVP_MD_CTX_cleanup(&md_ctx);
2027 int ssl3_send_certificate_request(SSL *s)
2029 unsigned char *p,*d;
2031 STACK_OF(X509_NAME) *sk=NULL;
2035 if (s->state == SSL3_ST_SW_CERT_REQ_A)
2039 d=p=(unsigned char *)&(buf->data[4]);
2041 /* get the list of acceptable cert types */
2043 n=ssl3_get_req_cert_type(s,p);
2048 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2050 nl = tls12_get_req_sig_algs(s, p + 2);
2060 sk=SSL_get_client_CA_list(s);
2064 for (i=0; i<sk_X509_NAME_num(sk); i++)
2066 name=sk_X509_NAME_value(sk,i);
2067 j=i2d_X509_NAME(name,NULL);
2068 if (!BUF_MEM_grow_clean(buf,4+n+j+2))
2070 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
2073 p=(unsigned char *)&(buf->data[4+n]);
2074 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2077 i2d_X509_NAME(name,&p);
2084 i2d_X509_NAME(name,&p);
2085 j-=2; s2n(j,d); j+=2;
2091 /* else no CA names */
2092 p=(unsigned char *)&(buf->data[4+off]);
2095 d=(unsigned char *)buf->data;
2096 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
2099 /* we should now have things packed up, so lets send
2104 #ifdef NETSCAPE_HANG_BUG
2105 if (!BUF_MEM_grow_clean(buf, s->init_num + 4))
2107 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
2110 p=(unsigned char *)s->init_buf->data + s->init_num;
2113 *(p++)=SSL3_MT_SERVER_DONE;
2120 s->state = SSL3_ST_SW_CERT_REQ_B;
2123 /* SSL3_ST_SW_CERT_REQ_B */
2124 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2129 int ssl3_get_client_key_exchange(SSL *s)
2133 unsigned long alg_k;
2135 #ifndef OPENSSL_NO_RSA
2137 EVP_PKEY *pkey=NULL;
2139 #ifndef OPENSSL_NO_DH
2143 #ifndef OPENSSL_NO_KRB5
2145 #endif /* OPENSSL_NO_KRB5 */
2147 #ifndef OPENSSL_NO_ECDH
2148 EC_KEY *srvr_ecdh = NULL;
2149 EVP_PKEY *clnt_pub_pkey = NULL;
2150 EC_POINT *clnt_ecpoint = NULL;
2151 BN_CTX *bn_ctx = NULL;
2154 n=s->method->ssl_get_message(s,
2155 SSL3_ST_SR_KEY_EXCH_A,
2156 SSL3_ST_SR_KEY_EXCH_B,
2157 SSL3_MT_CLIENT_KEY_EXCHANGE,
2161 if (!ok) return((int)n);
2162 p=(unsigned char *)s->init_msg;
2164 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2166 #ifndef OPENSSL_NO_RSA
2167 if (alg_k & SSL_kRSA)
2169 /* FIX THIS UP EAY EAY EAY EAY */
2170 if (s->s3->tmp.use_rsa_tmp)
2172 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
2173 rsa=s->cert->rsa_tmp;
2174 /* Don't do a callback because rsa_tmp should
2175 * be sent already */
2178 al=SSL_AD_HANDSHAKE_FAILURE;
2179 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
2186 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
2187 if ( (pkey == NULL) ||
2188 (pkey->type != EVP_PKEY_RSA) ||
2189 (pkey->pkey.rsa == NULL))
2191 al=SSL_AD_HANDSHAKE_FAILURE;
2192 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
2198 /* TLS and [incidentally] DTLS{0xFEFF} */
2199 if (s->version > SSL3_VERSION && s->version != DTLS1_BAD_VER)
2204 if (!(s->options & SSL_OP_TLS_D5_BUG))
2206 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
2216 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
2220 if (i != SSL_MAX_MASTER_KEY_LENGTH)
2222 al=SSL_AD_DECODE_ERROR;
2223 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */
2226 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
2228 /* The premaster secret must contain the same version number as the
2229 * ClientHello to detect version rollback attacks (strangely, the
2230 * protocol does not offer such protection for DH ciphersuites).
2231 * However, buggy clients exist that send the negotiated protocol
2232 * version instead if the server does not support the requested
2234 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
2235 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
2236 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
2238 al=SSL_AD_DECODE_ERROR;
2239 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */
2241 /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack
2242 * (http://eprint.iacr.org/2003/052/) exploits the version
2243 * number check as a "bad version oracle" -- an alert would
2244 * reveal that the plaintext corresponding to some ciphertext
2245 * made up by the adversary is properly formatted except
2246 * that the version number is wrong. To avoid such attacks,
2247 * we should treat this just like any other decryption error. */
2253 /* Some decryption failure -- use random value instead as countermeasure
2254 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
2255 * (see RFC 2246, section 7.4.7.1). */
2257 i = SSL_MAX_MASTER_KEY_LENGTH;
2258 p[0] = s->client_version >> 8;
2259 p[1] = s->client_version & 0xff;
2260 if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */
2264 s->session->master_key_length=
2265 s->method->ssl3_enc->generate_master_secret(s,
2266 s->session->master_key,
2268 OPENSSL_cleanse(p,i);
2272 #ifndef OPENSSL_NO_DH
2273 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2278 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
2280 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
2290 if (n == 0L) /* the parameters are in the cert */
2292 al=SSL_AD_HANDSHAKE_FAILURE;
2293 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
2298 if (s->s3->tmp.dh == NULL)
2300 al=SSL_AD_HANDSHAKE_FAILURE;
2301 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
2305 dh_srvr=s->s3->tmp.dh;
2308 pub=BN_bin2bn(p,i,NULL);
2311 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
2315 i=DH_compute_key(p,pub,dh_srvr);
2319 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2324 DH_free(s->s3->tmp.dh);
2329 s->session->master_key_length=
2330 s->method->ssl3_enc->generate_master_secret(s,
2331 s->session->master_key,p,i);
2332 OPENSSL_cleanse(p,i);
2336 #ifndef OPENSSL_NO_KRB5
2337 if (alg_k & SSL_kKRB5)
2339 krb5_error_code krb5rc;
2340 krb5_data enc_ticket;
2341 krb5_data authenticator;
2343 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2344 EVP_CIPHER_CTX ciph_ctx;
2345 const EVP_CIPHER *enc = NULL;
2346 unsigned char iv[EVP_MAX_IV_LENGTH];
2347 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
2348 + EVP_MAX_BLOCK_LENGTH];
2350 krb5_timestamp authtime = 0;
2351 krb5_ticket_times ttimes;
2353 EVP_CIPHER_CTX_init(&ciph_ctx);
2355 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
2358 enc_ticket.length = i;
2360 if (n < (long)(enc_ticket.length + 6))
2362 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2363 SSL_R_DATA_LENGTH_TOO_LONG);
2367 enc_ticket.data = (char *)p;
2368 p+=enc_ticket.length;
2371 authenticator.length = i;
2373 if (n < (long)(enc_ticket.length + authenticator.length + 6))
2375 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2376 SSL_R_DATA_LENGTH_TOO_LONG);
2380 authenticator.data = (char *)p;
2381 p+=authenticator.length;
2385 enc_pms.data = (char *)p;
2388 /* Note that the length is checked again below,
2391 if(enc_pms.length > sizeof pms)
2393 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2394 SSL_R_DATA_LENGTH_TOO_LONG);
2398 if (n != (long)(enc_ticket.length + authenticator.length +
2399 enc_pms.length + 6))
2401 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2402 SSL_R_DATA_LENGTH_TOO_LONG);
2406 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
2410 printf("kssl_sget_tkt rtn %d [%d]\n",
2411 krb5rc, kssl_err.reason);
2413 printf("kssl_err text= %s\n", kssl_err.text);
2414 #endif /* KSSL_DEBUG */
2415 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2420 /* Note: no authenticator is not considered an error,
2421 ** but will return authtime == 0.
2423 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
2424 &authtime, &kssl_err)) != 0)
2427 printf("kssl_check_authent rtn %d [%d]\n",
2428 krb5rc, kssl_err.reason);
2430 printf("kssl_err text= %s\n", kssl_err.text);
2431 #endif /* KSSL_DEBUG */
2432 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2437 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
2439 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc);
2444 kssl_ctx_show(kssl_ctx);
2445 #endif /* KSSL_DEBUG */
2447 enc = kssl_map_enc(kssl_ctx->enctype);
2451 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2453 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
2455 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2456 SSL_R_DECRYPTION_FAILED);
2459 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
2460 (unsigned char *)enc_pms.data, enc_pms.length))
2462 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2463 SSL_R_DECRYPTION_FAILED);
2466 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2468 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2469 SSL_R_DATA_LENGTH_TOO_LONG);
2472 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
2474 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2475 SSL_R_DECRYPTION_FAILED);
2479 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2481 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2482 SSL_R_DATA_LENGTH_TOO_LONG);
2485 if (!((pms[0] == (s->client_version>>8)) && (pms[1] == (s->client_version & 0xff))))
2487 /* The premaster secret must contain the same version number as the
2488 * ClientHello to detect version rollback attacks (strangely, the
2489 * protocol does not offer such protection for DH ciphersuites).
2490 * However, buggy clients exist that send random bytes instead of
2491 * the protocol version.
2492 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients.
2493 * (Perhaps we should have a separate BUG value for the Kerberos cipher)
2495 if (!(s->options & SSL_OP_TLS_ROLLBACK_BUG))
2497 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2498 SSL_AD_DECODE_ERROR);
2503 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2505 s->session->master_key_length=
2506 s->method->ssl3_enc->generate_master_secret(s,
2507 s->session->master_key, pms, outl);
2509 if (kssl_ctx->client_princ)
2511 size_t len = strlen(kssl_ctx->client_princ);
2512 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
2514 s->session->krb5_client_princ_len = len;
2515 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
2520 /* Was doing kssl_ctx_free() here,
2521 ** but it caused problems for apache.
2522 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
2523 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
2527 #endif /* OPENSSL_NO_KRB5 */
2529 #ifndef OPENSSL_NO_ECDH
2530 if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2535 const EC_GROUP *group;
2536 const BIGNUM *priv_key;
2538 /* initialize structures for server's ECDH key pair */
2539 if ((srvr_ecdh = EC_KEY_new()) == NULL)
2541 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2542 ERR_R_MALLOC_FAILURE);
2546 /* Let's get server private key and group information */
2547 if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2549 /* use the certificate */
2550 tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec;
2554 /* use the ephermeral values we saved when
2555 * generating the ServerKeyExchange msg.
2557 tkey = s->s3->tmp.ecdh;
2560 group = EC_KEY_get0_group(tkey);
2561 priv_key = EC_KEY_get0_private_key(tkey);
2563 if (!EC_KEY_set_group(srvr_ecdh, group) ||
2564 !EC_KEY_set_private_key(srvr_ecdh, priv_key))
2566 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2571 /* Let's get client's public key */
2572 if ((clnt_ecpoint = EC_POINT_new(group)) == NULL)
2574 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2575 ERR_R_MALLOC_FAILURE);
2581 /* Client Publickey was in Client Certificate */
2583 if (alg_k & SSL_kEECDH)
2585 al=SSL_AD_HANDSHAKE_FAILURE;
2586 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
2589 if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer))
2591 (clnt_pub_pkey->type != EVP_PKEY_EC))
2593 /* XXX: For now, we do not support client
2594 * authentication using ECDH certificates
2595 * so this branch (n == 0L) of the code is
2596 * never executed. When that support is
2597 * added, we ought to ensure the key
2598 * received in the certificate is
2599 * authorized for key agreement.
2600 * ECDH_compute_key implicitly checks that
2601 * the two ECDH shares are for the same
2604 al=SSL_AD_HANDSHAKE_FAILURE;
2605 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2606 SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
2610 if (EC_POINT_copy(clnt_ecpoint,
2611 EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0)
2613 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2617 ret = 2; /* Skip certificate verify processing */
2621 /* Get client's public key from encoded point
2622 * in the ClientKeyExchange message.
2624 if ((bn_ctx = BN_CTX_new()) == NULL)
2626 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2627 ERR_R_MALLOC_FAILURE);
2631 /* Get encoded point length */
2636 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2640 if (EC_POINT_oct2point(group,
2641 clnt_ecpoint, p, i, bn_ctx) == 0)
2643 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2647 /* p is pointing to somewhere in the buffer
2648 * currently, so set it to the start
2650 p=(unsigned char *)s->init_buf->data;
2653 /* Compute the shared pre-master secret */
2654 field_size = EC_GROUP_get_degree(group);
2655 if (field_size <= 0)
2657 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2661 i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL);
2664 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2669 EVP_PKEY_free(clnt_pub_pkey);
2670 EC_POINT_free(clnt_ecpoint);
2671 EC_KEY_free(srvr_ecdh);
2672 BN_CTX_free(bn_ctx);
2673 EC_KEY_free(s->s3->tmp.ecdh);
2674 s->s3->tmp.ecdh = NULL;
2676 /* Compute the master secret */
2677 s->session->master_key_length = s->method->ssl3_enc-> \
2678 generate_master_secret(s, s->session->master_key, p, i);
2680 OPENSSL_cleanse(p, i);
2685 #ifndef OPENSSL_NO_PSK
2686 if (alg_k & SSL_kPSK)
2688 unsigned char *t = NULL;
2689 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2690 unsigned int pre_ms_len = 0, psk_len = 0;
2692 char tmp_id[PSK_MAX_IDENTITY_LEN+1];
2694 al=SSL_AD_HANDSHAKE_FAILURE;
2699 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2700 SSL_R_LENGTH_MISMATCH);
2703 if (i > PSK_MAX_IDENTITY_LEN)
2705 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2706 SSL_R_DATA_LENGTH_TOO_LONG);
2709 if (s->psk_server_callback == NULL)
2711 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2712 SSL_R_PSK_NO_SERVER_CB);
2716 /* Create guaranteed NULL-terminated identity
2717 * string for the callback */
2718 memcpy(tmp_id, p, i);
2719 memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
2720 psk_len = s->psk_server_callback(s, tmp_id,
2721 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2722 OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1);
2724 if (psk_len > PSK_MAX_PSK_LEN)
2726 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2727 ERR_R_INTERNAL_ERROR);
2730 else if (psk_len == 0)
2732 /* PSK related to the given identity not found */
2733 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2734 SSL_R_PSK_IDENTITY_NOT_FOUND);
2735 al=SSL_AD_UNKNOWN_PSK_IDENTITY;
2739 /* create PSK pre_master_secret */
2740 pre_ms_len=2+psk_len+2+psk_len;
2742 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2744 memset(t, 0, psk_len);
2748 if (s->session->psk_identity != NULL)
2749 OPENSSL_free(s->session->psk_identity);
2750 s->session->psk_identity = BUF_strdup((char *)p);
2751 if (s->session->psk_identity == NULL)
2753 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2754 ERR_R_MALLOC_FAILURE);
2758 if (s->session->psk_identity_hint != NULL)
2759 OPENSSL_free(s->session->psk_identity_hint);
2760 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2761 if (s->ctx->psk_identity_hint != NULL &&
2762 s->session->psk_identity_hint == NULL)
2764 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2765 ERR_R_MALLOC_FAILURE);
2769 s->session->master_key_length=
2770 s->method->ssl3_enc->generate_master_secret(s,
2771 s->session->master_key, psk_or_pre_ms, pre_ms_len);
2774 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2780 #ifndef OPENSSL_NO_SRP
2781 if (alg_k & SSL_kSRP)
2789 al=SSL_AD_DECODE_ERROR;
2790 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_SRP_A_LENGTH);
2793 if (!(s->srp_ctx.A=BN_bin2bn(p,i,NULL)))
2795 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_BN_LIB);
2798 if (s->session->srp_username != NULL)
2799 OPENSSL_free(s->session->srp_username);
2800 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2801 if (s->session->srp_username == NULL)
2803 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2804 ERR_R_MALLOC_FAILURE);
2808 if ((s->session->master_key_length = SRP_generate_server_master_secret(s,s->session->master_key))<0)
2810 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2817 #endif /* OPENSSL_NO_SRP */
2818 if (alg_k & SSL_kGOST)
2821 EVP_PKEY_CTX *pkey_ctx;
2822 EVP_PKEY *client_pub_pkey = NULL, *pk = NULL;
2823 unsigned char premaster_secret[32], *start;
2824 size_t outlen=32, inlen;
2825 unsigned long alg_a;
2829 /* Get our certificate private key*/
2830 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2831 if (alg_a & SSL_aGOST94)
2832 pk = s->cert->pkeys[SSL_PKEY_GOST94].privatekey;
2833 else if (alg_a & SSL_aGOST01)
2834 pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey;
2836 pkey_ctx = EVP_PKEY_CTX_new(pk,NULL);
2837 EVP_PKEY_decrypt_init(pkey_ctx);
2838 /* If client certificate is present and is of the same type, maybe
2839 * use it for key exchange. Don't mind errors from
2840 * EVP_PKEY_derive_set_peer, because it is completely valid to use
2841 * a client certificate for authorization only. */
2842 client_pub_pkey = X509_get_pubkey(s->session->peer);
2843 if (client_pub_pkey)
2845 if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0)
2848 /* Decrypt session key */
2849 if (ASN1_get_object((const unsigned char **)&p, &Tlen, &Ttag, &Tclass, n) != V_ASN1_CONSTRUCTED ||
2850 Ttag != V_ASN1_SEQUENCE ||
2851 Tclass != V_ASN1_UNIVERSAL)
2853 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED);
2858 if (EVP_PKEY_decrypt(pkey_ctx,premaster_secret,&outlen,start,inlen) <=0)
2861 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED);
2864 /* Generate master secret */
2865 s->session->master_key_length=
2866 s->method->ssl3_enc->generate_master_secret(s,
2867 s->session->master_key,premaster_secret,32);
2868 /* Check if pubkey from client certificate was used */
2869 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2874 EVP_PKEY_free(client_pub_pkey);
2875 EVP_PKEY_CTX_free(pkey_ctx);
2883 al=SSL_AD_HANDSHAKE_FAILURE;
2884 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2885 SSL_R_UNKNOWN_CIPHER_TYPE);
2891 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2892 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_SRP)
2895 #ifndef OPENSSL_NO_ECDH
2896 EVP_PKEY_free(clnt_pub_pkey);
2897 EC_POINT_free(clnt_ecpoint);
2898 if (srvr_ecdh != NULL)
2899 EC_KEY_free(srvr_ecdh);
2900 BN_CTX_free(bn_ctx);
2905 int ssl3_get_cert_verify(SSL *s)
2907 EVP_PKEY *pkey=NULL;
2913 const EVP_MD *md = NULL;
2915 EVP_MD_CTX_init(&mctx);
2917 n=s->method->ssl_get_message(s,
2918 SSL3_ST_SR_CERT_VRFY_A,
2919 SSL3_ST_SR_CERT_VRFY_B,
2921 516, /* Enough for 4096 bit RSA key with TLS v1.2 */
2924 if (!ok) return((int)n);
2926 if (s->session->peer != NULL)
2928 peer=s->session->peer;
2929 pkey=X509_get_pubkey(peer);
2930 type=X509_certificate_type(peer,pkey);
2938 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
2940 s->s3->tmp.reuse_message=1;
2941 if ((peer != NULL) && (type & EVP_PKT_SIGN))
2943 al=SSL_AD_UNEXPECTED_MESSAGE;
2944 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
2953 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
2954 al=SSL_AD_UNEXPECTED_MESSAGE;
2958 if (!(type & EVP_PKT_SIGN))
2960 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
2961 al=SSL_AD_ILLEGAL_PARAMETER;
2965 if (s->s3->change_cipher_spec)
2967 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
2968 al=SSL_AD_UNEXPECTED_MESSAGE;
2972 /* we now have a signature that we need to verify */
2973 p=(unsigned char *)s->init_msg;
2974 /* Check for broken implementations of GOST ciphersuites */
2975 /* If key is GOST and n is exactly 64, it is bare
2976 * signature without length field */
2977 if (n==64 && (pkey->type==NID_id_GostR3410_94 ||
2978 pkey->type == NID_id_GostR3410_2001) )
2984 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2986 int sigalg = tls12_get_sigid(pkey);
2987 /* Should never happen */
2990 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
2991 al=SSL_AD_INTERNAL_ERROR;
2994 /* Check key type is consistent with signature */
2995 if (sigalg != (int)p[1])
2997 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_TYPE);
2998 al=SSL_AD_DECODE_ERROR;
3001 md = tls12_get_hash(p[0]);
3004 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_UNKNOWN_DIGEST);
3005 al=SSL_AD_DECODE_ERROR;
3009 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
3018 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
3019 al=SSL_AD_DECODE_ERROR;
3023 j=EVP_PKEY_size(pkey);
3024 if ((i > j) || (n > j) || (n <= 0))
3026 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
3027 al=SSL_AD_DECODE_ERROR;
3031 if (TLS1_get_version(s) >= TLS1_2_VERSION)
3035 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
3038 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, ERR_R_INTERNAL_ERROR);
3039 al=SSL_AD_INTERNAL_ERROR;
3043 fprintf(stderr, "Using TLS 1.2 with client verify alg %s\n",
3046 if (!EVP_VerifyInit_ex(&mctx, md, NULL)
3047 || !EVP_VerifyUpdate(&mctx, hdata, hdatalen))
3049 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, ERR_R_EVP_LIB);
3050 al=SSL_AD_INTERNAL_ERROR;
3054 if (EVP_VerifyFinal(&mctx, p , i, pkey) <= 0)
3056 al=SSL_AD_DECRYPT_ERROR;
3057 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_SIGNATURE);
3062 #ifndef OPENSSL_NO_RSA
3063 if (pkey->type == EVP_PKEY_RSA)
3065 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
3066 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
3070 al=SSL_AD_DECRYPT_ERROR;
3071 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
3076 al=SSL_AD_DECRYPT_ERROR;
3077 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
3083 #ifndef OPENSSL_NO_DSA
3084 if (pkey->type == EVP_PKEY_DSA)
3086 j=DSA_verify(pkey->save_type,
3087 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
3088 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
3092 al=SSL_AD_DECRYPT_ERROR;
3093 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
3099 #ifndef OPENSSL_NO_ECDSA
3100 if (pkey->type == EVP_PKEY_EC)
3102 j=ECDSA_verify(pkey->save_type,
3103 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
3104 SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec);
3108 al=SSL_AD_DECRYPT_ERROR;
3109 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
3110 SSL_R_BAD_ECDSA_SIGNATURE);
3116 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3117 { unsigned char signature[64];
3119 EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey,NULL);
3120 EVP_PKEY_verify_init(pctx);
3122 fprintf(stderr,"GOST signature length is %d",i);
3124 for (idx=0;idx<64;idx++) {
3125 signature[63-idx]=p[idx];
3127 j=EVP_PKEY_verify(pctx,signature,64,s->s3->tmp.cert_verify_md,32);
3128 EVP_PKEY_CTX_free(pctx);
3131 al=SSL_AD_DECRYPT_ERROR;
3132 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
3133 SSL_R_BAD_ECDSA_SIGNATURE);
3139 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
3140 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
3149 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3152 if (s->s3->handshake_buffer)
3154 BIO_free(s->s3->handshake_buffer);
3155 s->s3->handshake_buffer = NULL;
3156 s->s3->flags &= ~TLS1_FLAGS_KEEP_HANDSHAKE;
3158 EVP_MD_CTX_cleanup(&mctx);
3159 EVP_PKEY_free(pkey);
3163 int ssl3_get_client_certificate(SSL *s)
3165 int i,ok,al,ret= -1;
3167 unsigned long l,nc,llen,n;
3168 const unsigned char *p,*q;
3170 STACK_OF(X509) *sk=NULL;
3172 n=s->method->ssl_get_message(s,
3179 if (!ok) return((int)n);
3181 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
3183 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
3184 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
3186 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
3187 al=SSL_AD_HANDSHAKE_FAILURE;
3190 /* If tls asked for a client cert, the client must return a 0 list */
3191 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
3193 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
3194 al=SSL_AD_UNEXPECTED_MESSAGE;
3197 s->s3->tmp.reuse_message=1;
3201 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
3203 al=SSL_AD_UNEXPECTED_MESSAGE;
3204 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
3207 p=d=(unsigned char *)s->init_msg;
3209 if ((sk=sk_X509_new_null()) == NULL)
3211 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
3218 al=SSL_AD_DECODE_ERROR;
3219 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
3222 for (nc=0; nc<llen; )
3225 if ((l+nc+3) > llen)
3227 al=SSL_AD_DECODE_ERROR;
3228 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
3233 x=d2i_X509(NULL,&p,l);
3236 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
3241 al=SSL_AD_DECODE_ERROR;
3242 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
3245 if (!sk_X509_push(sk,x))
3247 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
3254 if (sk_X509_num(sk) <= 0)
3256 /* TLS does not mind 0 certs returned */
3257 if (s->version == SSL3_VERSION)
3259 al=SSL_AD_HANDSHAKE_FAILURE;
3260 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
3263 /* Fail for TLS only if we required a certificate */
3264 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
3265 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
3267 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
3268 al=SSL_AD_HANDSHAKE_FAILURE;
3271 /* No client certificate so digest cached records */
3272 if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s))
3274 al=SSL_AD_INTERNAL_ERROR;
3280 i=ssl_verify_cert_chain(s,sk);
3283 al=ssl_verify_alarm_type(s->verify_result);
3284 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
3289 if (s->session->peer != NULL) /* This should not be needed */
3290 X509_free(s->session->peer);
3291 s->session->peer=sk_X509_shift(sk);
3292 s->session->verify_result = s->verify_result;
3294 /* With the current implementation, sess_cert will always be NULL
3295 * when we arrive here. */
3296 if (s->session->sess_cert == NULL)
3298 s->session->sess_cert = ssl_sess_cert_new();
3299 if (s->session->sess_cert == NULL)
3301 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
3305 if (s->session->sess_cert->cert_chain != NULL)
3306 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
3307 s->session->sess_cert->cert_chain=sk;
3308 /* Inconsistency alert: cert_chain does *not* include the
3309 * peer's own certificate, while we do include it in s3_clnt.c */
3317 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3320 if (x != NULL) X509_free(x);
3321 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
3325 int ssl3_send_server_certificate(SSL *s)
3330 if (s->state == SSL3_ST_SW_CERT_A)
3332 x=ssl_get_server_send_cert(s);
3335 /* VRS: allow null cert if auth == KRB5 */
3336 if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) ||
3337 (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5))
3339 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
3344 l=ssl3_output_cert_chain(s,x);
3345 s->state=SSL3_ST_SW_CERT_B;
3350 /* SSL3_ST_SW_CERT_B */
3351 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3354 #ifndef OPENSSL_NO_TLSEXT
3355 /* send a new session ticket (not necessarily for a new session) */
3356 int ssl3_send_newsession_ticket(SSL *s)
3358 if (s->state == SSL3_ST_SW_SESSION_TICKET_A)
3360 unsigned char *p, *senc, *macstart;
3361 const unsigned char *const_p;
3362 int len, slen_full, slen;
3367 SSL_CTX *tctx = s->initial_ctx;
3368 unsigned char iv[EVP_MAX_IV_LENGTH];
3369 unsigned char key_name[16];
3371 /* get session encoding length */
3372 slen_full = i2d_SSL_SESSION(s->session, NULL);
3373 /* Some length values are 16 bits, so forget it if session is
3376 if (slen_full > 0xFF00)
3378 senc = OPENSSL_malloc(slen_full);
3382 i2d_SSL_SESSION(s->session, &p);
3384 /* create a fresh copy (not shared with other threads) to clean up */
3386 sess = d2i_SSL_SESSION(NULL, &const_p, slen_full);
3392 sess->session_id_length = 0; /* ID is irrelevant for the ticket */
3394 slen = i2d_SSL_SESSION(sess, NULL);
3395 if (slen > slen_full) /* shouldn't ever happen */
3401 i2d_SSL_SESSION(sess, &p);
3402 SSL_SESSION_free(sess);
3404 /* Grow buffer if need be: the length calculation is as
3405 * follows 1 (size of message name) + 3 (message length
3406 * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) +
3407 * 16 (key name) + max_iv_len (iv length) +
3408 * session_length + max_enc_block_size (max encrypted session
3409 * length) + max_md_size (HMAC).
3411 if (!BUF_MEM_grow(s->init_buf,
3412 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH +
3413 EVP_MAX_MD_SIZE + slen))
3416 p=(unsigned char *)s->init_buf->data;
3418 *(p++)=SSL3_MT_NEWSESSION_TICKET;
3419 /* Skip message length for now */
3421 EVP_CIPHER_CTX_init(&ctx);
3422 HMAC_CTX_init(&hctx);
3423 /* Initialize HMAC and cipher contexts. If callback present
3424 * it does all the work otherwise use generated values
3427 if (tctx->tlsext_ticket_key_cb)
3429 if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
3438 RAND_pseudo_bytes(iv, 16);
3439 EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
3440 tctx->tlsext_tick_aes_key, iv);
3441 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
3442 tlsext_tick_md(), NULL);
3443 memcpy(key_name, tctx->tlsext_tick_key_name, 16);
3446 /* Ticket lifetime hint (advisory only):
3447 * We leave this unspecified for resumed session (for simplicity),
3448 * and guess that tickets for new sessions will live as long
3449 * as their sessions. */
3450 l2n(s->hit ? 0 : s->session->timeout, p);
3452 /* Skip ticket length for now */
3454 /* Output key name */
3456 memcpy(p, key_name, 16);
3459 memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
3460 p += EVP_CIPHER_CTX_iv_length(&ctx);
3461 /* Encrypt session data */
3462 EVP_EncryptUpdate(&ctx, p, &len, senc, slen);
3464 EVP_EncryptFinal(&ctx, p, &len);
3466 EVP_CIPHER_CTX_cleanup(&ctx);
3468 HMAC_Update(&hctx, macstart, p - macstart);
3469 HMAC_Final(&hctx, p, &hlen);
3470 HMAC_CTX_cleanup(&hctx);
3473 /* Now write out lengths: p points to end of data written */
3475 len = p - (unsigned char *)s->init_buf->data;
3476 p=(unsigned char *)s->init_buf->data + 1;
3477 l2n3(len - 4, p); /* Message length */
3479 s2n(len - 10, p); /* Ticket length */
3481 /* number of bytes to write */
3483 s->state=SSL3_ST_SW_SESSION_TICKET_B;
3488 /* SSL3_ST_SW_SESSION_TICKET_B */
3489 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3492 int ssl3_send_cert_status(SSL *s)
3494 if (s->state == SSL3_ST_SW_CERT_STATUS_A)
3497 /* Grow buffer if need be: the length calculation is as
3498 * follows 1 (message type) + 3 (message length) +
3499 * 1 (ocsp response type) + 3 (ocsp response length)
3502 if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen))
3505 p=(unsigned char *)s->init_buf->data;
3508 *(p++)=SSL3_MT_CERTIFICATE_STATUS;
3509 /* message length */
3510 l2n3(s->tlsext_ocsp_resplen + 4, p);
3512 *(p++)= s->tlsext_status_type;
3513 /* length of OCSP response */
3514 l2n3(s->tlsext_ocsp_resplen, p);
3515 /* actual response */
3516 memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen);
3517 /* number of bytes to write */
3518 s->init_num = 8 + s->tlsext_ocsp_resplen;
3519 s->state=SSL3_ST_SW_CERT_STATUS_B;
3523 /* SSL3_ST_SW_CERT_STATUS_B */
3524 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3527 # ifndef OPENSSL_NO_NEXTPROTONEG
3528 /* ssl3_get_next_proto reads a Next Protocol Negotiation handshake message. It
3529 * sets the next_proto member in s if found */
3530 int ssl3_get_next_proto(SSL *s)
3533 int proto_len, padding_len;
3535 const unsigned char *p;
3537 /* Clients cannot send a NextProtocol message if we didn't see the
3538 * extension in their ClientHello */
3539 if (!s->s3->next_proto_neg_seen)
3541 SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION);
3545 n=s->method->ssl_get_message(s,
3546 SSL3_ST_SR_NEXT_PROTO_A,
3547 SSL3_ST_SR_NEXT_PROTO_B,
3549 514, /* See the payload format below */
3555 /* s->state doesn't reflect whether ChangeCipherSpec has been received
3556 * in this handshake, but s->s3->change_cipher_spec does (will be reset
3557 * by ssl3_get_finished). */
3558 if (!s->s3->change_cipher_spec)
3560 SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS);
3565 return 0; /* The body must be > 1 bytes long */
3567 p=(unsigned char *)s->init_msg;
3569 /* The payload looks like:
3571 * uint8 proto[proto_len];
3572 * uint8 padding_len;
3573 * uint8 padding[padding_len];
3576 if (proto_len + 2 > s->init_num)
3578 padding_len = p[proto_len + 1];
3579 if (proto_len + padding_len + 2 != s->init_num)
3582 s->next_proto_negotiated = OPENSSL_malloc(proto_len);
3583 if (!s->next_proto_negotiated)
3585 SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,ERR_R_MALLOC_FAILURE);
3588 memcpy(s->next_proto_negotiated, p + 1, proto_len);
3589 s->next_proto_negotiated_len = proto_len;