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
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
160 #include <openssl/fips.h>
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
173 static const SSL_METHOD *ssl3_get_client_method(int ver)
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
184 ssl3_get_client_method)
186 int ssl3_connect(SSL *s)
189 unsigned long Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
192 int new_state,state,skip=0;
194 RAND_add(&Time,sizeof(Time),0);
198 if (s->info_callback != NULL)
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
206 #ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
211 if (s->tlsext_hb_pending)
213 s->tlsext_hb_pending = 0;
224 case SSL_ST_RENEGOTIATE:
226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
237 if ((s->version & 0xff00 ) != 0x0300)
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
244 if (!ssl_security(s, SSL_SECOP_VERSION, 0,
247 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW);
251 /* s->version=SSL3_VERSION; */
252 s->type=SSL_ST_CONNECT;
254 if (s->init_buf == NULL)
256 if ((buf=BUF_MEM_new()) == NULL)
261 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
270 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
272 /* setup buffing BIO */
273 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
275 /* don't push the buffering BIO quite yet */
277 ssl3_init_finished_mac(s);
279 s->state=SSL3_ST_CW_CLNT_HELLO_A;
280 s->ctx->stats.sess_connect++;
284 case SSL3_ST_CW_CLNT_HELLO_A:
285 case SSL3_ST_CW_CLNT_HELLO_B:
288 ret=ssl3_client_hello(s);
289 if (ret <= 0) goto end;
290 s->state=SSL3_ST_CR_SRVR_HELLO_A;
293 /* turn on buffering for the next lot of output */
294 if (s->bbio != s->wbio)
295 s->wbio=BIO_push(s->bbio,s->wbio);
299 case SSL3_ST_CR_SRVR_HELLO_A:
300 case SSL3_ST_CR_SRVR_HELLO_B:
301 ret=ssl3_get_server_hello(s);
302 if (ret <= 0) goto end;
306 s->state=SSL3_ST_CR_FINISHED_A;
307 #ifndef OPENSSL_NO_TLSEXT
308 if (s->tlsext_ticket_expected)
310 /* receive renewed session ticket */
311 s->state=SSL3_ST_CR_SESSION_TICKET_A;
317 s->state=SSL3_ST_CR_CERT_A;
321 #ifndef OPENSSL_NO_TLSEXT
322 case SSL3_ST_CR_SUPPLEMENTAL_DATA_A:
323 case SSL3_ST_CR_SUPPLEMENTAL_DATA_B:
324 ret = tls1_get_server_supplemental_data(s);
325 if (ret <= 0) goto end;
326 s->state=SSL3_ST_CR_CERT_A;
330 case SSL3_ST_CR_CERT_A:
331 case SSL3_ST_CR_CERT_B:
332 #ifndef OPENSSL_NO_TLSEXT
333 ret=ssl3_check_finished(s);
334 if (ret <= 0) goto end;
337 s->state=SSL3_ST_CR_SUPPLEMENTAL_DATA_A;
344 if (s->tlsext_ticket_expected)
345 s->state=SSL3_ST_CR_SESSION_TICKET_A;
347 s->state=SSL3_ST_CR_FINISHED_A;
352 /* Check if it is anon DH/ECDH */
354 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
355 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
357 ret=ssl3_get_server_certificate(s);
358 if (ret <= 0) goto end;
359 #ifndef OPENSSL_NO_TLSEXT
360 if (s->tlsext_status_expected)
361 s->state=SSL3_ST_CR_CERT_STATUS_A;
363 s->state=SSL3_ST_CR_KEY_EXCH_A;
368 s->state=SSL3_ST_CR_KEY_EXCH_A;
375 s->state=SSL3_ST_CR_KEY_EXCH_A;
380 case SSL3_ST_CR_KEY_EXCH_A:
381 case SSL3_ST_CR_KEY_EXCH_B:
382 ret=ssl3_get_key_exchange(s);
383 if (ret <= 0) goto end;
384 s->state=SSL3_ST_CR_CERT_REQ_A;
387 /* at this point we check that we have the
388 * required stuff from the server */
389 if (!ssl3_check_cert_and_algorithm(s))
396 case SSL3_ST_CR_CERT_REQ_A:
397 case SSL3_ST_CR_CERT_REQ_B:
398 ret=ssl3_get_certificate_request(s);
399 if (ret <= 0) goto end;
400 s->state=SSL3_ST_CR_SRVR_DONE_A;
404 case SSL3_ST_CR_SRVR_DONE_A:
405 case SSL3_ST_CR_SRVR_DONE_B:
406 ret=ssl3_get_server_done(s);
407 if (ret <= 0) goto end;
408 #ifndef OPENSSL_NO_SRP
409 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
411 if ((ret = SRP_Calc_A_param(s))<=0)
413 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
414 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
419 #ifndef OPENSSL_NO_TLSEXT
420 s->state=SSL3_ST_CW_SUPPLEMENTAL_DATA_A;
422 if (s->s3->tmp.cert_req)
423 s->state=SSL3_ST_CW_CERT_A;
425 s->state=SSL3_ST_CW_KEY_EXCH_A;
431 case SSL3_ST_CW_CERT_A:
432 case SSL3_ST_CW_CERT_B:
433 case SSL3_ST_CW_CERT_C:
434 case SSL3_ST_CW_CERT_D:
435 ret=ssl3_send_client_certificate(s);
436 if (ret <= 0) goto end;
437 s->state=SSL3_ST_CW_KEY_EXCH_A;
441 case SSL3_ST_CW_KEY_EXCH_A:
442 case SSL3_ST_CW_KEY_EXCH_B:
443 ret=ssl3_send_client_key_exchange(s);
444 if (ret <= 0) goto end;
445 /* EAY EAY EAY need to check for DH fix cert
447 /* For TLS, cert_req is set to 2, so a cert chain
448 * of nothing is sent, but no verify packet is sent */
449 /* XXX: For now, we do not support client
450 * authentication in ECDH cipher suites with
451 * ECDH (rather than ECDSA) certificates.
452 * We need to skip the certificate verify
453 * message when client's ECDH public key is sent
454 * inside the client certificate.
456 if (s->s3->tmp.cert_req == 1)
458 s->state=SSL3_ST_CW_CERT_VRFY_A;
462 s->state=SSL3_ST_CW_CHANGE_A;
463 s->s3->change_cipher_spec=0;
465 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
467 s->state=SSL3_ST_CW_CHANGE_A;
468 s->s3->change_cipher_spec=0;
474 case SSL3_ST_CW_CERT_VRFY_A:
475 case SSL3_ST_CW_CERT_VRFY_B:
476 ret=ssl3_send_client_verify(s);
477 if (ret <= 0) goto end;
478 s->state=SSL3_ST_CW_CHANGE_A;
480 s->s3->change_cipher_spec=0;
483 case SSL3_ST_CW_CHANGE_A:
484 case SSL3_ST_CW_CHANGE_B:
485 ret=ssl3_send_change_cipher_spec(s,
486 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
487 if (ret <= 0) goto end;
489 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
490 s->state=SSL3_ST_CW_FINISHED_A;
492 if (s->s3->next_proto_neg_seen)
493 s->state=SSL3_ST_CW_NEXT_PROTO_A;
495 s->state=SSL3_ST_CW_FINISHED_A;
499 s->session->cipher=s->s3->tmp.new_cipher;
500 #ifdef OPENSSL_NO_COMP
501 s->session->compress_meth=0;
503 if (s->s3->tmp.new_compression == NULL)
504 s->session->compress_meth=0;
506 s->session->compress_meth=
507 s->s3->tmp.new_compression->id;
509 if (!s->method->ssl3_enc->setup_key_block(s))
515 if (!s->method->ssl3_enc->change_cipher_state(s,
516 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
524 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
525 case SSL3_ST_CW_NEXT_PROTO_A:
526 case SSL3_ST_CW_NEXT_PROTO_B:
527 ret=ssl3_send_next_proto(s);
528 if (ret <= 0) goto end;
529 s->state=SSL3_ST_CW_FINISHED_A;
533 #ifndef OPENSSL_NO_TLSEXT
534 case SSL3_ST_CW_SUPPLEMENTAL_DATA_A:
535 case SSL3_ST_CW_SUPPLEMENTAL_DATA_B:
536 ret = tls1_send_client_supplemental_data(s, &skip);
537 if (ret <= 0) goto end;
538 if (s->s3->tmp.cert_req)
539 s->state=SSL3_ST_CW_CERT_A;
541 s->state=SSL3_ST_CW_KEY_EXCH_A;
546 case SSL3_ST_CW_FINISHED_A:
547 case SSL3_ST_CW_FINISHED_B:
548 ret=ssl3_send_finished(s,
549 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
550 s->method->ssl3_enc->client_finished_label,
551 s->method->ssl3_enc->client_finished_label_len);
552 if (ret <= 0) goto end;
553 s->state=SSL3_ST_CW_FLUSH;
556 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
559 s->s3->tmp.next_state=SSL_ST_OK;
560 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
563 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
564 s->s3->delay_buf_pop_ret=0;
569 #ifndef OPENSSL_NO_TLSEXT
570 /* Allow NewSessionTicket if ticket expected */
571 if (s->tlsext_ticket_expected)
572 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
576 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
581 #ifndef OPENSSL_NO_TLSEXT
582 case SSL3_ST_CR_SESSION_TICKET_A:
583 case SSL3_ST_CR_SESSION_TICKET_B:
584 ret=ssl3_get_new_session_ticket(s);
585 if (ret <= 0) goto end;
586 s->state=SSL3_ST_CR_FINISHED_A;
590 case SSL3_ST_CR_CERT_STATUS_A:
591 case SSL3_ST_CR_CERT_STATUS_B:
592 ret=ssl3_get_cert_status(s);
593 if (ret <= 0) goto end;
594 s->state=SSL3_ST_CR_KEY_EXCH_A;
599 case SSL3_ST_CR_FINISHED_A:
600 case SSL3_ST_CR_FINISHED_B:
602 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
603 SSL3_ST_CR_FINISHED_B);
604 if (ret <= 0) goto end;
607 s->state=SSL3_ST_CW_CHANGE_A;
613 case SSL3_ST_CW_FLUSH:
614 s->rwstate=SSL_WRITING;
615 if (BIO_flush(s->wbio) <= 0)
620 s->rwstate=SSL_NOTHING;
621 s->state=s->s3->tmp.next_state;
625 /* clean a few things up */
626 ssl3_cleanup_key_block(s);
628 if (s->init_buf != NULL)
630 BUF_MEM_free(s->init_buf);
634 /* If we are not 'joining' the last two packets,
635 * remove the buffering now */
636 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
637 ssl_free_wbio_buffer(s);
638 /* else do it later in ssl3_write */
644 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
645 if (s->hit) s->ctx->stats.sess_hit++;
649 s->handshake_func=ssl3_connect;
650 s->ctx->stats.sess_connect_good++;
652 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
658 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
664 /* did we do anything */
665 if (!s->s3->tmp.reuse_message && !skip)
669 if ((ret=BIO_flush(s->wbio)) <= 0)
673 if ((cb != NULL) && (s->state != state))
677 cb(s,SSL_CB_CONNECT_LOOP,1);
688 cb(s,SSL_CB_CONNECT_EXIT,ret);
693 int ssl3_client_hello(SSL *s)
700 #ifndef OPENSSL_NO_COMP
705 buf=(unsigned char *)s->init_buf->data;
706 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
708 SSL_SESSION *sess = s->session;
709 if ((sess == NULL) ||
710 (sess->ssl_version != s->version) ||
711 #ifdef OPENSSL_NO_TLSEXT
712 !sess->session_id_length ||
714 (!sess->session_id_length && !sess->tlsext_tick) ||
716 (sess->not_resumable))
718 if (!ssl_get_new_session(s,0))
721 if (s->method->version == DTLS_ANY_VERSION)
723 /* Determine which DTLS version to use */
724 int options = s->options;
725 /* If DTLS 1.2 disabled correct the version number */
726 if (options & SSL_OP_NO_DTLSv1_2)
730 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
733 /* Disabling all versions is silly: return an
736 if (options & SSL_OP_NO_DTLSv1)
738 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
741 /* Update method so we don't use any DTLS 1.2
744 s->method = DTLSv1_client_method();
745 s->version = DTLS1_VERSION;
749 /* We only support one version: update method */
750 if (options & SSL_OP_NO_DTLSv1)
751 s->method = DTLSv1_2_client_method();
752 s->version = DTLS1_2_VERSION;
754 s->client_version = s->version;
756 /* else use the pre-loaded session */
758 p=s->s3->client_random;
760 /* for DTLS if client_random is initialized, reuse it, we are
761 * required to use same upon reply to HelloVerify */
766 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
779 ssl_fill_hello_random(s, 0, p,
780 sizeof(s->s3->client_random));
782 /* Do the message type and length last */
783 d=p= ssl_handshake_start(s);
785 /* version indicates the negotiated version: for example from
786 * an SSLv2/v3 compatible client hello). The client_version
787 * field is the maximum version we permit and it is also
788 * used in RSA encrypted premaster secrets. Some servers can
789 * choke if we initially report a higher version then
790 * renegotiate to a lower one in the premaster secret. This
791 * didn't happen with TLS 1.0 as most servers supported it
792 * but it can with TLS 1.1 or later if the server only supports
795 * Possible scenario with previous logic:
796 * 1. Client hello indicates TLS 1.2
797 * 2. Server hello says TLS 1.0
798 * 3. RSA encrypted premaster secret uses 1.2.
799 * 4. Handhaked proceeds using TLS 1.0.
800 * 5. Server sends hello request to renegotiate.
801 * 6. Client hello indicates TLS v1.0 as we now
802 * know that is maximum server supports.
803 * 7. Server chokes on RSA encrypted premaster secret
804 * containing version 1.0.
806 * For interoperability it should be OK to always use the
807 * maximum version we support in client hello and then rely
808 * on the checking of version to ensure the servers isn't
809 * being inconsistent: for example initially negotiating with
810 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
811 * client_version in client hello and not resetting it to
812 * the negotiated version.
815 *(p++)=s->version>>8;
816 *(p++)=s->version&0xff;
817 s->client_version=s->version;
819 *(p++)=s->client_version>>8;
820 *(p++)=s->client_version&0xff;
824 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
831 i=s->session->session_id_length;
835 if (i > (int)sizeof(s->session->session_id))
837 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
840 memcpy(p,s->session->session_id,i);
844 /* cookie stuff for DTLS */
847 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
849 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
852 *(p++) = s->d1->cookie_len;
853 memcpy(p, s->d1->cookie, s->d1->cookie_len);
854 p += s->d1->cookie_len;
857 /* Ciphers supported */
858 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
861 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
864 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
865 /* Some servers hang if client hello > 256 bytes
866 * as hack workaround chop number of supported ciphers
867 * to keep it well below this if we use TLS v1.2
869 if (TLS1_get_version(s) >= TLS1_2_VERSION
870 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
871 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
877 #ifdef OPENSSL_NO_COMP
881 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
884 j=sk_SSL_COMP_num(s->ctx->comp_methods);
888 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
892 *(p++)=0; /* Add the NULL method */
894 #ifndef OPENSSL_NO_TLSEXT
896 if (ssl_prepare_clienthello_tlsext(s) <= 0)
898 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
901 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
903 ssl3_send_alert(s,SSL3_AL_FATAL,al);
904 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
910 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
911 s->state=SSL3_ST_CW_CLNT_HELLO_B;
914 /* SSL3_ST_CW_CLNT_HELLO_B */
915 return ssl_do_write(s);
920 int ssl3_get_server_hello(SSL *s)
922 STACK_OF(SSL_CIPHER) *sk;
926 int i,al=SSL_AD_INTERNAL_ERROR,ok;
929 #ifndef OPENSSL_NO_COMP
932 /* Hello verify request and/or server hello version may not
933 * match so set first packet if we're negotiating version.
938 n=s->method->ssl_get_message(s,
939 SSL3_ST_CR_SRVR_HELLO_A,
940 SSL3_ST_CR_SRVR_HELLO_B,
945 if (!ok) return((int)n);
950 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
952 if ( s->d1->send_cookie == 0)
954 s->s3->tmp.reuse_message = 1;
957 else /* already sent a cookie */
959 al=SSL_AD_UNEXPECTED_MESSAGE;
960 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
966 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
968 al=SSL_AD_UNEXPECTED_MESSAGE;
969 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
973 d=p=(unsigned char *)s->init_msg;
974 if (s->method->version == DTLS_ANY_VERSION)
976 /* Work out correct protocol version to use */
977 int hversion = (p[0] << 8)|p[1];
978 int options = s->options;
979 if (hversion == DTLS1_2_VERSION
980 && !(options & SSL_OP_NO_DTLSv1_2))
981 s->method = DTLSv1_2_client_method();
982 else if (tls1_suiteb(s))
984 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
985 s->version = hversion;
986 al = SSL_AD_PROTOCOL_VERSION;
989 else if (hversion == DTLS1_VERSION
990 && !(options & SSL_OP_NO_DTLSv1))
991 s->method = DTLSv1_client_method();
994 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
995 s->version = hversion;
996 al = SSL_AD_PROTOCOL_VERSION;
999 s->version = s->client_version = s->method->version;
1002 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
1004 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
1005 s->version=(s->version&0xff00)|p[1];
1006 al=SSL_AD_PROTOCOL_VERSION;
1011 /* load the server hello data */
1012 /* load the server random */
1013 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
1014 p+=SSL3_RANDOM_SIZE;
1016 /* get the session-id */
1019 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
1021 al=SSL_AD_ILLEGAL_PARAMETER;
1022 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
1026 #ifndef OPENSSL_NO_TLSEXT
1027 /* check if we want to resume the session based on external pre-shared secret */
1028 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1030 SSL_CIPHER *pref_cipher=NULL;
1031 s->session->master_key_length=sizeof(s->session->master_key);
1032 if (s->tls_session_secret_cb(s, s->session->master_key,
1033 &s->session->master_key_length,
1035 s->tls_session_secret_cb_arg))
1037 s->session->cipher = pref_cipher ?
1038 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1041 #endif /* OPENSSL_NO_TLSEXT */
1043 if (j != 0 && j == s->session->session_id_length
1044 && memcmp(p,s->session->session_id,j) == 0)
1046 if(s->sid_ctx_length != s->session->sid_ctx_length
1047 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1049 /* actually a client application bug */
1050 al=SSL_AD_ILLEGAL_PARAMETER;
1051 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1056 else /* a miss or crap from the other end */
1058 /* If we were trying for session-id reuse, make a new
1059 * SSL_SESSION so we don't stuff up other people */
1061 if (s->session->session_id_length > 0)
1063 if (!ssl_get_new_session(s,0))
1068 s->session->session_id_length=j;
1069 memcpy(s->session->session_id,p,j); /* j could be 0 */
1072 c=ssl_get_cipher_by_char(s,p);
1075 /* unknown cipher */
1076 al=SSL_AD_ILLEGAL_PARAMETER;
1077 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1080 /* Set version disabled mask now we know version */
1081 if (!SSL_USE_TLS1_2_CIPHERS(s))
1082 ct->mask_ssl = SSL_TLSV1_2;
1085 /* If it is a disabled cipher we didn't send it in client hello,
1086 * so return an error.
1088 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK))
1090 al=SSL_AD_ILLEGAL_PARAMETER;
1091 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1094 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1096 sk=ssl_get_ciphers_by_id(s);
1097 i=sk_SSL_CIPHER_find(sk,c);
1100 /* we did not say we would use this cipher */
1101 al=SSL_AD_ILLEGAL_PARAMETER;
1102 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1106 /* Depending on the session caching (internal/external), the cipher
1107 and/or cipher_id values may not be set. Make sure that
1108 cipher_id is set and use it for comparison. */
1109 if (s->session->cipher)
1110 s->session->cipher_id = s->session->cipher->id;
1111 if (s->hit && (s->session->cipher_id != c->id))
1113 /* Workaround is now obsolete */
1116 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1119 al=SSL_AD_ILLEGAL_PARAMETER;
1120 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1124 s->s3->tmp.new_cipher=c;
1125 /* Don't digest cached records if no sigalgs: we may need them for
1126 * client authentication.
1128 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1130 /* lets get the compression algorithm */
1132 #ifdef OPENSSL_NO_COMP
1135 al=SSL_AD_ILLEGAL_PARAMETER;
1136 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1139 /* If compression is disabled we'd better not try to resume a session
1140 * using compression.
1142 if (s->session->compress_meth != 0)
1144 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1149 if (s->hit && j != s->session->compress_meth)
1151 al=SSL_AD_ILLEGAL_PARAMETER;
1152 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1157 else if (!ssl_allow_compression(s))
1159 al=SSL_AD_ILLEGAL_PARAMETER;
1160 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1164 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1166 if ((j != 0) && (comp == NULL))
1168 al=SSL_AD_ILLEGAL_PARAMETER;
1169 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1174 s->s3->tmp.new_compression=comp;
1178 #ifndef OPENSSL_NO_TLSEXT
1180 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1182 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1189 /* wrong packet length */
1190 al=SSL_AD_DECODE_ERROR;
1191 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1197 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1202 int ssl3_get_server_certificate(SSL *s)
1204 int al,i,ok,ret= -1;
1205 unsigned long n,nc,llen,l;
1207 const unsigned char *q,*p;
1209 STACK_OF(X509) *sk=NULL;
1211 EVP_PKEY *pkey=NULL;
1212 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1214 n=s->method->ssl_get_message(s,
1221 if (!ok) return((int)n);
1223 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1224 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1225 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1227 s->s3->tmp.reuse_message=1;
1231 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1233 al=SSL_AD_UNEXPECTED_MESSAGE;
1234 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1237 p=d=(unsigned char *)s->init_msg;
1239 if ((sk=sk_X509_new_null()) == NULL)
1241 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1248 al=SSL_AD_DECODE_ERROR;
1249 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1252 for (nc=0; nc<llen; )
1255 if ((l+nc+3) > llen)
1257 al=SSL_AD_DECODE_ERROR;
1258 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1263 x=d2i_X509(NULL,&q,l);
1266 al=SSL_AD_BAD_CERTIFICATE;
1267 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1272 al=SSL_AD_DECODE_ERROR;
1273 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1276 if (!sk_X509_push(sk,x))
1278 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1286 i=ssl_verify_cert_chain(s,sk);
1287 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1288 #ifndef OPENSSL_NO_KRB5
1289 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1290 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1291 #endif /* OPENSSL_NO_KRB5 */
1294 al=ssl_verify_alarm_type(s->verify_result);
1295 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1298 ERR_clear_error(); /* but we keep s->verify_result */
1301 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1302 al = SSL_AD_HANDSHAKE_FAILURE;
1306 sc=ssl_sess_cert_new();
1307 if (sc == NULL) goto err;
1309 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1310 s->session->sess_cert=sc;
1313 /* Inconsistency alert: cert_chain does include the peer's
1314 * certificate, which we don't include in s3_srvr.c */
1315 x=sk_X509_value(sk,0);
1317 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1319 pkey=X509_get_pubkey(x);
1321 /* VRS: allow null cert if auth == KRB5 */
1322 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1323 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1327 printf("pkey,x = %p, %p\n", pkey,x);
1328 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1329 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1330 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1331 #endif /* KSSL_DEBUG */
1333 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1337 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1338 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1342 i=ssl_cert_type(x,pkey);
1343 if (need_cert && i < 0)
1347 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1348 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1354 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1355 if (exp_idx >= 0 && i != exp_idx)
1358 al=SSL_AD_ILLEGAL_PARAMETER;
1359 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1360 SSL_R_WRONG_CERTIFICATE_TYPE);
1363 sc->peer_cert_type=i;
1364 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1365 /* Why would the following ever happen?
1366 * We just created sc a couple of lines ago. */
1367 if (sc->peer_pkeys[i].x509 != NULL)
1368 X509_free(sc->peer_pkeys[i].x509);
1369 sc->peer_pkeys[i].x509=x;
1370 sc->peer_key= &(sc->peer_pkeys[i]);
1372 if (s->session->peer != NULL)
1373 X509_free(s->session->peer);
1374 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1379 sc->peer_cert_type=i;
1382 if (s->session->peer != NULL)
1383 X509_free(s->session->peer);
1384 s->session->peer=NULL;
1386 s->session->verify_result = s->verify_result;
1393 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1396 EVP_PKEY_free(pkey);
1398 sk_X509_pop_free(sk,X509_free);
1402 int ssl3_get_key_exchange(SSL *s)
1404 #ifndef OPENSSL_NO_RSA
1405 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1408 unsigned char *param,*p;
1409 int al,i,j,param_len,ok;
1411 EVP_PKEY *pkey=NULL;
1412 const EVP_MD *md = NULL;
1413 #ifndef OPENSSL_NO_RSA
1416 #ifndef OPENSSL_NO_DH
1419 #ifndef OPENSSL_NO_ECDH
1420 EC_KEY *ecdh = NULL;
1421 BN_CTX *bn_ctx = NULL;
1422 EC_POINT *srvr_ecpoint = NULL;
1424 int encoded_pt_len = 0;
1427 /* use same message size as in ssl3_get_certificate_request()
1428 * as ServerKeyExchange message may be skipped */
1429 n=s->method->ssl_get_message(s,
1430 SSL3_ST_CR_KEY_EXCH_A,
1431 SSL3_ST_CR_KEY_EXCH_B,
1435 if (!ok) return((int)n);
1437 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1439 #ifndef OPENSSL_NO_PSK
1440 /* In plain PSK ciphersuite, ServerKeyExchange can be
1441 omitted if no identity hint is sent. Set
1442 session->sess_cert anyway to avoid problems
1444 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1446 s->session->sess_cert=ssl_sess_cert_new();
1447 if (s->ctx->psk_identity_hint)
1448 OPENSSL_free(s->ctx->psk_identity_hint);
1449 s->ctx->psk_identity_hint = NULL;
1452 s->s3->tmp.reuse_message=1;
1456 param=p=(unsigned char *)s->init_msg;
1457 if (s->session->sess_cert != NULL)
1459 #ifndef OPENSSL_NO_RSA
1460 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1462 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1463 s->session->sess_cert->peer_rsa_tmp=NULL;
1466 #ifndef OPENSSL_NO_DH
1467 if (s->session->sess_cert->peer_dh_tmp)
1469 DH_free(s->session->sess_cert->peer_dh_tmp);
1470 s->session->sess_cert->peer_dh_tmp=NULL;
1473 #ifndef OPENSSL_NO_ECDH
1474 if (s->session->sess_cert->peer_ecdh_tmp)
1476 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1477 s->session->sess_cert->peer_ecdh_tmp=NULL;
1483 s->session->sess_cert=ssl_sess_cert_new();
1487 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1488 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1489 EVP_MD_CTX_init(&md_ctx);
1491 #ifndef OPENSSL_NO_PSK
1492 if (alg_k & SSL_kPSK)
1494 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1496 al=SSL_AD_HANDSHAKE_FAILURE;
1499 /* Store PSK identity hint for later use, hint is used
1500 * in ssl3_send_client_key_exchange. Assume that the
1501 * maximum length of a PSK identity hint can be as
1502 * long as the maximum length of a PSK identity. */
1503 if (i > PSK_MAX_IDENTITY_LEN)
1505 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1506 SSL_R_DATA_LENGTH_TOO_LONG);
1511 al=SSL_AD_DECODE_ERROR;
1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1513 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1516 /* If received PSK identity hint contains NULL
1517 * characters, the hint is truncated from the first
1518 * NULL. p may not be ending with NULL, so create a
1519 * NULL-terminated string. */
1520 memcpy(tmp_id_hint, p, i);
1521 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1522 if (s->ctx->psk_identity_hint != NULL)
1523 OPENSSL_free(s->ctx->psk_identity_hint);
1524 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1525 if (s->ctx->psk_identity_hint == NULL)
1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1535 #endif /* !OPENSSL_NO_PSK */
1536 #ifndef OPENSSL_NO_SRP
1537 if (alg_k & SSL_kSRP)
1543 al=SSL_AD_DECODE_ERROR;
1544 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1547 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1549 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1558 al=SSL_AD_DECODE_ERROR;
1559 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1562 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1564 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1569 i = (unsigned int)(p[0]);
1574 al=SSL_AD_DECODE_ERROR;
1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1578 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1580 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1589 al=SSL_AD_DECODE_ERROR;
1590 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1593 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1595 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1601 /* We must check if there is a certificate */
1602 #ifndef OPENSSL_NO_RSA
1603 if (alg_a & SSL_aRSA)
1604 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1609 #ifndef OPENSSL_NO_DSA
1610 else if (alg_a & SSL_aDSS)
1611 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1615 #endif /* !OPENSSL_NO_SRP */
1616 #ifndef OPENSSL_NO_RSA
1617 if (alg_k & SSL_kRSA)
1619 if ((rsa=RSA_new()) == NULL)
1621 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1628 al=SSL_AD_DECODE_ERROR;
1629 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1632 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1634 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1643 al=SSL_AD_DECODE_ERROR;
1644 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1647 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1649 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1655 /* this should be because we are using an export cipher */
1656 if (alg_a & SSL_aRSA)
1657 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1660 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1663 s->session->sess_cert->peer_rsa_tmp=rsa;
1666 #else /* OPENSSL_NO_RSA */
1670 #ifndef OPENSSL_NO_DH
1671 else if (alg_k & SSL_kDHE)
1673 if ((dh=DH_new()) == NULL)
1675 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1682 al=SSL_AD_DECODE_ERROR;
1683 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1686 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1688 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1697 al=SSL_AD_DECODE_ERROR;
1698 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1701 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1703 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1712 al=SSL_AD_DECODE_ERROR;
1713 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1716 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1718 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1724 if (!ssl_security(s, SSL_SECOP_TMP_DH,
1725 DH_security_bits(dh), 0, dh))
1727 al=SSL_AD_HANDSHAKE_FAILURE;
1728 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL);
1732 #ifndef OPENSSL_NO_RSA
1733 if (alg_a & SSL_aRSA)
1734 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1739 #ifndef OPENSSL_NO_DSA
1740 else if (alg_a & SSL_aDSS)
1741 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1743 /* else anonymous DH, so no certificate or pkey. */
1745 s->session->sess_cert->peer_dh_tmp=dh;
1748 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1750 al=SSL_AD_ILLEGAL_PARAMETER;
1751 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1754 #endif /* !OPENSSL_NO_DH */
1756 #ifndef OPENSSL_NO_ECDH
1757 else if (alg_k & SSL_kECDHE)
1760 const EC_GROUP *group;
1762 if ((ecdh=EC_KEY_new()) == NULL)
1764 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1768 /* Extract elliptic curve parameters and the
1769 * server's ephemeral ECDH public key.
1770 * Keep accumulating lengths of various components in
1771 * param_len and make sure it never exceeds n.
1774 /* XXX: For now we only support named (not generic) curves
1775 * and the ECParameters in this case is just three bytes.
1778 /* Check curve is one of our preferences, if not server has
1779 * sent an invalid curve.
1781 if (!tls1_check_curve(s, p, param_len))
1783 al=SSL_AD_DECODE_ERROR;
1784 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1788 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1790 al=SSL_AD_INTERNAL_ERROR;
1791 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1795 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1798 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1801 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1803 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1806 EC_GROUP_free(ngroup);
1808 group = EC_KEY_get0_group(ecdh);
1810 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1811 (EC_GROUP_get_degree(group) > 163))
1813 al=SSL_AD_EXPORT_RESTRICTION;
1814 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1820 /* Next, get the encoded ECPoint */
1821 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1822 ((bn_ctx = BN_CTX_new()) == NULL))
1824 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1828 encoded_pt_len = *p; /* length of encoded point */
1830 param_len += (1 + encoded_pt_len);
1831 if ((param_len > n) ||
1832 (EC_POINT_oct2point(group, srvr_ecpoint,
1833 p, encoded_pt_len, bn_ctx) == 0))
1835 al=SSL_AD_DECODE_ERROR;
1836 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1843 /* The ECC/TLS specification does not mention
1844 * the use of DSA to sign ECParameters in the server
1845 * key exchange message. We do support RSA and ECDSA.
1848 #ifndef OPENSSL_NO_RSA
1849 else if (alg_a & SSL_aRSA)
1850 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1852 #ifndef OPENSSL_NO_ECDSA
1853 else if (alg_a & SSL_aECDSA)
1854 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1856 /* else anonymous ECDH, so no certificate or pkey. */
1857 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1858 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1860 BN_CTX_free(bn_ctx);
1862 EC_POINT_free(srvr_ecpoint);
1863 srvr_ecpoint = NULL;
1867 al=SSL_AD_UNEXPECTED_MESSAGE;
1868 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1871 #endif /* !OPENSSL_NO_ECDH */
1874 /* p points to the next byte, there are 'n' bytes left */
1876 /* if it was signed, check the signature */
1879 if (SSL_USE_SIGALGS(s))
1881 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1886 al = SSL_AD_DECODE_ERROR;
1890 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1900 j=EVP_PKEY_size(pkey);
1902 if ((i != n) || (n > j) || (n <= 0))
1904 /* wrong packet length */
1905 al=SSL_AD_DECODE_ERROR;
1906 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1910 #ifndef OPENSSL_NO_RSA
1911 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1917 for (num=2; num > 0; num--)
1919 EVP_MD_CTX_set_flags(&md_ctx,
1920 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1921 EVP_DigestInit_ex(&md_ctx,(num == 2)
1922 ?s->ctx->md5:s->ctx->sha1, NULL);
1923 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1924 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1925 EVP_DigestUpdate(&md_ctx,param,param_len);
1926 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1930 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1934 al=SSL_AD_DECRYPT_ERROR;
1935 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1941 al=SSL_AD_DECRYPT_ERROR;
1942 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1949 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1950 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1951 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1952 EVP_VerifyUpdate(&md_ctx,param,param_len);
1953 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1956 al=SSL_AD_DECRYPT_ERROR;
1957 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1964 /* aNULL or kPSK do not need public keys */
1965 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1967 /* Might be wrong key type, check it */
1968 if (ssl3_check_cert_and_algorithm(s))
1969 /* Otherwise this shouldn't happen */
1970 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1973 /* still data left over */
1976 al=SSL_AD_DECODE_ERROR;
1977 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1981 EVP_PKEY_free(pkey);
1982 EVP_MD_CTX_cleanup(&md_ctx);
1985 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1987 EVP_PKEY_free(pkey);
1988 #ifndef OPENSSL_NO_RSA
1992 #ifndef OPENSSL_NO_DH
1996 #ifndef OPENSSL_NO_ECDH
1997 BN_CTX_free(bn_ctx);
1998 EC_POINT_free(srvr_ecpoint);
2002 EVP_MD_CTX_cleanup(&md_ctx);
2006 int ssl3_get_certificate_request(SSL *s)
2009 unsigned long n,nc,l;
2010 unsigned int llen, ctype_num,i;
2012 const unsigned char *p,*q;
2014 STACK_OF(X509_NAME) *ca_sk=NULL;
2016 n=s->method->ssl_get_message(s,
2017 SSL3_ST_CR_CERT_REQ_A,
2018 SSL3_ST_CR_CERT_REQ_B,
2023 if (!ok) return((int)n);
2025 s->s3->tmp.cert_req=0;
2027 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2029 s->s3->tmp.reuse_message=1;
2030 /* If we get here we don't need any cached handshake records
2031 * as we wont be doing client auth.
2033 if (s->s3->handshake_buffer)
2035 if (!ssl3_digest_cached_records(s))
2041 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2043 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2044 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2048 /* TLS does not like anon-DH with client cert */
2049 if (s->version > SSL3_VERSION)
2051 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2053 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2054 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2059 p=d=(unsigned char *)s->init_msg;
2061 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2063 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2067 /* get the certificate types */
2069 if (s->cert->ctypes)
2071 OPENSSL_free(s->cert->ctypes);
2072 s->cert->ctypes = NULL;
2074 if (ctype_num > SSL3_CT_NUMBER)
2076 /* If we exceed static buffer copy all to cert structure */
2077 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2078 memcpy(s->cert->ctypes, p, ctype_num);
2079 s->cert->ctype_num = (size_t)ctype_num;
2080 ctype_num=SSL3_CT_NUMBER;
2082 for (i=0; i<ctype_num; i++)
2083 s->s3->tmp.ctype[i]= p[i];
2085 if (SSL_USE_SIGALGS(s))
2088 /* Check we have enough room for signature algorithms and
2089 * following length value.
2091 if ((unsigned long)(p - d + llen + 2) > n)
2093 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2094 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2097 /* Clear certificate digests and validity flags */
2098 for (i = 0; i < SSL_PKEY_NUM; i++)
2100 s->cert->pkeys[i].digest = NULL;
2101 s->cert->pkeys[i].valid_flags = 0;
2103 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2105 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2106 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2112 /* get the CA RDNs */
2117 out=fopen("/tmp/vsign.der","w");
2118 fwrite(p,1,llen,out);
2123 if ((unsigned long)(p - d + llen) != n)
2125 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2126 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2130 for (nc=0; nc<llen; )
2133 if ((l+nc+2) > llen)
2135 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2136 goto cont; /* netscape bugs */
2137 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2138 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2144 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2146 /* If netscape tolerance is on, ignore errors */
2147 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2151 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2152 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2159 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2160 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2163 if (!sk_X509_NAME_push(ca_sk,xn))
2165 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2179 /* we should setup a certificate to return.... */
2180 s->s3->tmp.cert_req=1;
2181 s->s3->tmp.ctype_num=ctype_num;
2182 if (s->s3->tmp.ca_names != NULL)
2183 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2184 s->s3->tmp.ca_names=ca_sk;
2189 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2193 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2195 return(X509_NAME_cmp(*a,*b));
2197 #ifndef OPENSSL_NO_TLSEXT
2198 int ssl3_get_new_session_ticket(SSL *s)
2200 int ok,al,ret=0, ticklen;
2202 const unsigned char *p;
2205 n=s->method->ssl_get_message(s,
2206 SSL3_ST_CR_SESSION_TICKET_A,
2207 SSL3_ST_CR_SESSION_TICKET_B,
2215 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2217 s->s3->tmp.reuse_message=1;
2220 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2222 al=SSL_AD_UNEXPECTED_MESSAGE;
2223 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2228 /* need at least ticket_lifetime_hint + ticket length */
2229 al = SSL_AD_DECODE_ERROR;
2230 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2234 p=d=(unsigned char *)s->init_msg;
2235 n2l(p, s->session->tlsext_tick_lifetime_hint);
2237 /* ticket_lifetime_hint + ticket_length + ticket */
2238 if (ticklen + 6 != n)
2240 al = SSL_AD_DECODE_ERROR;
2241 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2244 if (s->session->tlsext_tick)
2246 OPENSSL_free(s->session->tlsext_tick);
2247 s->session->tlsext_ticklen = 0;
2249 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2250 if (!s->session->tlsext_tick)
2252 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2255 memcpy(s->session->tlsext_tick, p, ticklen);
2256 s->session->tlsext_ticklen = ticklen;
2257 /* There are two ways to detect a resumed ticket sesion.
2258 * One is to set an appropriate session ID and then the server
2259 * must return a match in ServerHello. This allows the normal
2260 * client session ID matching to work and we know much
2261 * earlier that the ticket has been accepted.
2263 * The other way is to set zero length session ID when the
2264 * ticket is presented and rely on the handshake to determine
2265 * session resumption.
2267 * We choose the former approach because this fits in with
2268 * assumptions elsewhere in OpenSSL. The session ID is set
2269 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2272 EVP_Digest(p, ticklen,
2273 s->session->session_id, &s->session->session_id_length,
2274 #ifndef OPENSSL_NO_SHA256
2275 EVP_sha256(), NULL);
2282 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2287 int ssl3_get_cert_status(SSL *s)
2290 unsigned long resplen,n;
2291 const unsigned char *p;
2293 n=s->method->ssl_get_message(s,
2294 SSL3_ST_CR_CERT_STATUS_A,
2295 SSL3_ST_CR_CERT_STATUS_B,
2296 SSL3_MT_CERTIFICATE_STATUS,
2300 if (!ok) return((int)n);
2303 /* need at least status type + length */
2304 al = SSL_AD_DECODE_ERROR;
2305 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2308 p = (unsigned char *)s->init_msg;
2309 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2311 al = SSL_AD_DECODE_ERROR;
2312 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2316 if (resplen + 4 != n)
2318 al = SSL_AD_DECODE_ERROR;
2319 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2322 if (s->tlsext_ocsp_resp)
2323 OPENSSL_free(s->tlsext_ocsp_resp);
2324 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2325 if (!s->tlsext_ocsp_resp)
2327 al = SSL_AD_INTERNAL_ERROR;
2328 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2331 s->tlsext_ocsp_resplen = resplen;
2332 if (s->ctx->tlsext_status_cb)
2335 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2338 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2339 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2344 al = SSL_AD_INTERNAL_ERROR;
2345 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2351 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2356 int ssl3_get_server_done(SSL *s)
2361 n=s->method->ssl_get_message(s,
2362 SSL3_ST_CR_SRVR_DONE_A,
2363 SSL3_ST_CR_SRVR_DONE_B,
2364 SSL3_MT_SERVER_DONE,
2365 30, /* should be very small, like 0 :-) */
2368 if (!ok) return((int)n);
2371 /* should contain no data */
2372 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2373 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2381 int ssl3_send_client_key_exchange(SSL *s)
2385 unsigned long alg_k;
2386 #ifndef OPENSSL_NO_RSA
2388 EVP_PKEY *pkey=NULL;
2390 #ifndef OPENSSL_NO_KRB5
2392 #endif /* OPENSSL_NO_KRB5 */
2393 #ifndef OPENSSL_NO_ECDH
2394 EC_KEY *clnt_ecdh = NULL;
2395 const EC_POINT *srvr_ecpoint = NULL;
2396 EVP_PKEY *srvr_pub_pkey = NULL;
2397 unsigned char *encodedPoint = NULL;
2398 int encoded_pt_len = 0;
2399 BN_CTX * bn_ctx = NULL;
2402 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2404 p = ssl_handshake_start(s);
2406 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2408 /* Fool emacs indentation */
2410 #ifndef OPENSSL_NO_RSA
2411 else if (alg_k & SSL_kRSA)
2414 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2416 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2417 rsa=s->session->sess_cert->peer_rsa_tmp;
2420 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2421 if ((pkey == NULL) ||
2422 (pkey->type != EVP_PKEY_RSA) ||
2423 (pkey->pkey.rsa == NULL))
2425 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2429 EVP_PKEY_free(pkey);
2432 tmp_buf[0]=s->client_version>>8;
2433 tmp_buf[1]=s->client_version&0xff;
2434 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2437 s->session->master_key_length=sizeof tmp_buf;
2440 /* Fix buf for TLS and beyond */
2441 if (s->version > SSL3_VERSION)
2443 n=RSA_public_encrypt(sizeof tmp_buf,
2444 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2446 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2447 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2451 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2455 /* Fix buf for TLS and beyond */
2456 if (s->version > SSL3_VERSION)
2462 s->session->master_key_length=
2463 s->method->ssl3_enc->generate_master_secret(s,
2464 s->session->master_key,
2465 tmp_buf,sizeof tmp_buf);
2466 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2469 #ifndef OPENSSL_NO_KRB5
2470 else if (alg_k & SSL_kKRB5)
2472 krb5_error_code krb5rc;
2473 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2474 /* krb5_data krb5_ap_req; */
2475 krb5_data *enc_ticket;
2476 krb5_data authenticator, *authp = NULL;
2477 EVP_CIPHER_CTX ciph_ctx;
2478 const EVP_CIPHER *enc = NULL;
2479 unsigned char iv[EVP_MAX_IV_LENGTH];
2480 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2481 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2482 + EVP_MAX_IV_LENGTH];
2483 int padl, outl = sizeof(epms);
2485 EVP_CIPHER_CTX_init(&ciph_ctx);
2488 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2490 #endif /* KSSL_DEBUG */
2494 if (KRB5SENDAUTH) authp = &authenticator;
2495 #endif /* KRB5SENDAUTH */
2497 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2499 enc = kssl_map_enc(kssl_ctx->enctype);
2504 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2505 if (krb5rc && kssl_err.text)
2506 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2508 #endif /* KSSL_DEBUG */
2512 ssl3_send_alert(s,SSL3_AL_FATAL,
2513 SSL_AD_HANDSHAKE_FAILURE);
2514 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2519 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2520 ** in place of RFC 2712 KerberosWrapper, as in:
2522 ** Send ticket (copy to *p, set n = length)
2523 ** n = krb5_ap_req.length;
2524 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2525 ** if (krb5_ap_req.data)
2526 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2528 ** Now using real RFC 2712 KerberosWrapper
2529 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2530 ** Note: 2712 "opaque" types are here replaced
2531 ** with a 2-byte length followed by the value.
2533 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2534 ** Where "xx xx" = length bytes. Shown here with
2535 ** optional authenticator omitted.
2538 /* KerberosWrapper.Ticket */
2539 s2n(enc_ticket->length,p);
2540 memcpy(p, enc_ticket->data, enc_ticket->length);
2541 p+= enc_ticket->length;
2542 n = enc_ticket->length + 2;
2544 /* KerberosWrapper.Authenticator */
2545 if (authp && authp->length)
2547 s2n(authp->length,p);
2548 memcpy(p, authp->data, authp->length);
2550 n+= authp->length + 2;
2558 s2n(0,p);/* null authenticator length */
2562 tmp_buf[0]=s->client_version>>8;
2563 tmp_buf[1]=s->client_version&0xff;
2564 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2567 /* 20010420 VRS. Tried it this way; failed.
2568 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2569 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2570 ** kssl_ctx->length);
2571 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2574 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2575 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2577 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2579 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2581 if (outl > (int)sizeof epms)
2583 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2586 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2588 /* KerberosWrapper.EncryptedPreMasterSecret */
2590 memcpy(p, epms, outl);
2594 s->session->master_key_length=
2595 s->method->ssl3_enc->generate_master_secret(s,
2596 s->session->master_key,
2597 tmp_buf, sizeof tmp_buf);
2599 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2600 OPENSSL_cleanse(epms, outl);
2603 #ifndef OPENSSL_NO_DH
2604 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2606 DH *dh_srvr,*dh_clnt;
2607 SESS_CERT *scert = s->session->sess_cert;
2611 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2616 if (scert->peer_dh_tmp != NULL)
2617 dh_srvr=scert->peer_dh_tmp;
2620 /* we get them from the cert */
2621 int idx = scert->peer_cert_type;
2622 EVP_PKEY *spkey = NULL;
2625 spkey = X509_get_pubkey(
2626 scert->peer_pkeys[idx].x509);
2629 dh_srvr = EVP_PKEY_get1_DH(spkey);
2630 EVP_PKEY_free(spkey);
2632 if (dh_srvr == NULL)
2634 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2635 ERR_R_INTERNAL_ERROR);
2639 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2641 /* Use client certificate key */
2642 EVP_PKEY *clkey = s->cert->key->privatekey;
2645 dh_clnt = EVP_PKEY_get1_DH(clkey);
2646 if (dh_clnt == NULL)
2648 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2649 ERR_R_INTERNAL_ERROR);
2655 /* generate a new random key */
2656 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2658 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2661 if (!DH_generate_key(dh_clnt))
2663 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2669 /* use the 'p' output buffer for the DH key, but
2670 * make sure to clear it out afterwards */
2672 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2673 if (scert->peer_dh_tmp == NULL)
2678 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2683 /* generate master key from the result */
2684 s->session->master_key_length=
2685 s->method->ssl3_enc->generate_master_secret(s,
2686 s->session->master_key,p,n);
2690 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2694 /* send off the data */
2695 n=BN_num_bytes(dh_clnt->pub_key);
2697 BN_bn2bin(dh_clnt->pub_key,p);
2703 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2707 #ifndef OPENSSL_NO_ECDH
2708 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2710 const EC_GROUP *srvr_group = NULL;
2712 int ecdh_clnt_cert = 0;
2715 /* Did we send out the client's
2716 * ECDH share for use in premaster
2717 * computation as part of client certificate?
2718 * If so, set ecdh_clnt_cert to 1.
2720 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2722 /* XXX: For now, we do not support client
2723 * authentication using ECDH certificates.
2724 * To add such support, one needs to add
2725 * code that checks for appropriate
2726 * conditions and sets ecdh_clnt_cert to 1.
2727 * For example, the cert have an ECC
2728 * key on the same curve as the server's
2729 * and the key should be authorized for
2732 * One also needs to add code in ssl3_connect
2733 * to skip sending the certificate verify
2736 * if ((s->cert->key->privatekey != NULL) &&
2737 * (s->cert->key->privatekey->type ==
2738 * EVP_PKEY_EC) && ...)
2739 * ecdh_clnt_cert = 1;
2743 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2745 tkey = s->session->sess_cert->peer_ecdh_tmp;
2749 /* Get the Server Public Key from Cert */
2750 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2751 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2752 if ((srvr_pub_pkey == NULL) ||
2753 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2754 (srvr_pub_pkey->pkey.ec == NULL))
2756 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2757 ERR_R_INTERNAL_ERROR);
2761 tkey = srvr_pub_pkey->pkey.ec;
2764 srvr_group = EC_KEY_get0_group(tkey);
2765 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2767 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2769 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2770 ERR_R_INTERNAL_ERROR);
2774 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2776 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2780 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2782 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2787 /* Reuse key info from our certificate
2788 * We only need our private key to perform
2789 * the ECDH computation.
2791 const BIGNUM *priv_key;
2792 tkey = s->cert->key->privatekey->pkey.ec;
2793 priv_key = EC_KEY_get0_private_key(tkey);
2794 if (priv_key == NULL)
2796 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2799 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2801 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2807 /* Generate a new ECDH key pair */
2808 if (!(EC_KEY_generate_key(clnt_ecdh)))
2810 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2815 /* use the 'p' output buffer for the ECDH key, but
2816 * make sure to clear it out afterwards
2819 field_size = EC_GROUP_get_degree(srvr_group);
2820 if (field_size <= 0)
2822 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2826 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2829 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2834 /* generate master key from the result */
2835 s->session->master_key_length = s->method->ssl3_enc \
2836 -> generate_master_secret(s,
2837 s->session->master_key,
2840 memset(p, 0, n); /* clean up */
2844 /* Send empty client key exch message */
2849 /* First check the size of encoding and
2850 * allocate memory accordingly.
2853 EC_POINT_point2oct(srvr_group,
2854 EC_KEY_get0_public_key(clnt_ecdh),
2855 POINT_CONVERSION_UNCOMPRESSED,
2858 encodedPoint = (unsigned char *)
2859 OPENSSL_malloc(encoded_pt_len *
2860 sizeof(unsigned char));
2861 bn_ctx = BN_CTX_new();
2862 if ((encodedPoint == NULL) ||
2865 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2869 /* Encode the public key */
2870 n = EC_POINT_point2oct(srvr_group,
2871 EC_KEY_get0_public_key(clnt_ecdh),
2872 POINT_CONVERSION_UNCOMPRESSED,
2873 encodedPoint, encoded_pt_len, bn_ctx);
2875 *p = n; /* length of encoded point */
2876 /* Encoded point will be copied here */
2878 /* copy the point */
2879 memcpy((unsigned char *)p, encodedPoint, n);
2880 /* increment n to account for length field */
2884 /* Free allocated memory */
2885 BN_CTX_free(bn_ctx);
2886 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2887 if (clnt_ecdh != NULL)
2888 EC_KEY_free(clnt_ecdh);
2889 EVP_PKEY_free(srvr_pub_pkey);
2891 #endif /* !OPENSSL_NO_ECDH */
2892 else if (alg_k & SSL_kGOST)
2894 /* GOST key exchange message creation */
2895 EVP_PKEY_CTX *pkey_ctx;
2898 unsigned int md_len;
2900 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2901 EVP_MD_CTX *ukm_hash;
2904 /* Get server sertificate PKEY and create ctx from it */
2905 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2907 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2909 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2913 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2914 /* If we have send a certificate, and certificate key
2916 * parameters match those of server certificate, use
2917 * certificate key for key exchange
2920 /* Otherwise, generate ephemeral key pair */
2922 EVP_PKEY_encrypt_init(pkey_ctx);
2923 /* Generate session key */
2924 RAND_bytes(premaster_secret,32);
2925 /* If we have client certificate, use its secret as peer key */
2926 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2927 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2928 /* If there was an error - just ignore it. Ephemeral key
2934 /* Compute shared IV and store it in algorithm-specific
2936 ukm_hash = EVP_MD_CTX_create();
2937 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2938 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2939 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2940 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2941 EVP_MD_CTX_destroy(ukm_hash);
2942 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2944 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2948 /* Make GOST keytransport blob message */
2949 /*Encapsulate it into sequence */
2950 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2952 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2953 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2960 *(p++)= msglen & 0xff;
2965 *(p++)= msglen & 0xff;
2968 memcpy(p, tmp, msglen);
2969 /* Check if pubkey from client certificate was used */
2970 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2972 /* Set flag "skip certificate verify" */
2973 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2975 EVP_PKEY_CTX_free(pkey_ctx);
2976 s->session->master_key_length=
2977 s->method->ssl3_enc->generate_master_secret(s,
2978 s->session->master_key,premaster_secret,32);
2979 EVP_PKEY_free(pub_key);
2982 #ifndef OPENSSL_NO_SRP
2983 else if (alg_k & SSL_kSRP)
2985 if (s->srp_ctx.A != NULL)
2987 /* send off the data */
2988 n=BN_num_bytes(s->srp_ctx.A);
2990 BN_bn2bin(s->srp_ctx.A,p);
2995 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2998 if (s->session->srp_username != NULL)
2999 OPENSSL_free(s->session->srp_username);
3000 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3001 if (s->session->srp_username == NULL)
3003 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3004 ERR_R_MALLOC_FAILURE);
3008 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3010 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3015 #ifndef OPENSSL_NO_PSK
3016 else if (alg_k & SSL_kPSK)
3018 char identity[PSK_MAX_IDENTITY_LEN];
3019 unsigned char *t = NULL;
3020 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3021 unsigned int pre_ms_len = 0, psk_len = 0;
3025 if (s->psk_client_callback == NULL)
3027 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3028 SSL_R_PSK_NO_CLIENT_CB);
3032 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3033 identity, PSK_MAX_IDENTITY_LEN,
3034 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3035 if (psk_len > PSK_MAX_PSK_LEN)
3037 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3038 ERR_R_INTERNAL_ERROR);
3041 else if (psk_len == 0)
3043 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3044 SSL_R_PSK_IDENTITY_NOT_FOUND);
3048 /* create PSK pre_master_secret */
3049 pre_ms_len = 2+psk_len+2+psk_len;
3051 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3053 memset(t, 0, psk_len);
3057 if (s->session->psk_identity_hint != NULL)
3058 OPENSSL_free(s->session->psk_identity_hint);
3059 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3060 if (s->ctx->psk_identity_hint != NULL &&
3061 s->session->psk_identity_hint == NULL)
3063 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3064 ERR_R_MALLOC_FAILURE);
3068 if (s->session->psk_identity != NULL)
3069 OPENSSL_free(s->session->psk_identity);
3070 s->session->psk_identity = BUF_strdup(identity);
3071 if (s->session->psk_identity == NULL)
3073 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3074 ERR_R_MALLOC_FAILURE);
3078 s->session->master_key_length =
3079 s->method->ssl3_enc->generate_master_secret(s,
3080 s->session->master_key,
3081 psk_or_pre_ms, pre_ms_len);
3082 n = strlen(identity);
3084 memcpy(p, identity, n);
3088 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
3089 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3092 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3099 ssl3_send_alert(s, SSL3_AL_FATAL,
3100 SSL_AD_HANDSHAKE_FAILURE);
3101 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3102 ERR_R_INTERNAL_ERROR);
3106 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3107 s->state=SSL3_ST_CW_KEY_EXCH_B;
3110 /* SSL3_ST_CW_KEY_EXCH_B */
3111 return ssl_do_write(s);
3113 #ifndef OPENSSL_NO_ECDH
3114 BN_CTX_free(bn_ctx);
3115 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3116 if (clnt_ecdh != NULL)
3117 EC_KEY_free(clnt_ecdh);
3118 EVP_PKEY_free(srvr_pub_pkey);
3123 int ssl3_send_client_verify(SSL *s)
3126 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3128 EVP_PKEY_CTX *pctx=NULL;
3134 EVP_MD_CTX_init(&mctx);
3136 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3138 p= ssl_handshake_start(s);
3139 pkey=s->cert->key->privatekey;
3140 /* Create context from key and test if sha1 is allowed as digest */
3141 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3142 EVP_PKEY_sign_init(pctx);
3143 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3145 if (!SSL_USE_SIGALGS(s))
3146 s->method->ssl3_enc->cert_verify_mac(s,
3148 &(data[MD5_DIGEST_LENGTH]));
3154 /* For TLS v1.2 send signature algorithm and signature
3155 * using agreed digest and cached handshake records.
3157 if (SSL_USE_SIGALGS(s))
3161 const EVP_MD *md = s->cert->key->digest;
3162 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3164 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3166 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3167 ERR_R_INTERNAL_ERROR);
3172 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3175 if (!EVP_SignInit_ex(&mctx, md, NULL)
3176 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3177 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3179 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3185 if (!ssl3_digest_cached_records(s))
3189 #ifndef OPENSSL_NO_RSA
3190 if (pkey->type == EVP_PKEY_RSA)
3192 s->method->ssl3_enc->cert_verify_mac(s,
3195 if (RSA_sign(NID_md5_sha1, data,
3196 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3197 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3199 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3207 #ifndef OPENSSL_NO_DSA
3208 if (pkey->type == EVP_PKEY_DSA)
3210 if (!DSA_sign(pkey->save_type,
3211 &(data[MD5_DIGEST_LENGTH]),
3212 SHA_DIGEST_LENGTH,&(p[2]),
3213 (unsigned int *)&j,pkey->pkey.dsa))
3215 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3223 #ifndef OPENSSL_NO_ECDSA
3224 if (pkey->type == EVP_PKEY_EC)
3226 if (!ECDSA_sign(pkey->save_type,
3227 &(data[MD5_DIGEST_LENGTH]),
3228 SHA_DIGEST_LENGTH,&(p[2]),
3229 (unsigned int *)&j,pkey->pkey.ec))
3231 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3240 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3242 unsigned char signbuf[64];
3245 s->method->ssl3_enc->cert_verify_mac(s,
3246 NID_id_GostR3411_94,
3248 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3249 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3250 ERR_R_INTERNAL_ERROR);
3253 for (i=63,j=0; i>=0; j++, i--) {
3261 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3264 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3265 s->state=SSL3_ST_CW_CERT_VRFY_B;
3267 EVP_MD_CTX_cleanup(&mctx);
3268 EVP_PKEY_CTX_free(pctx);
3269 return ssl_do_write(s);
3271 EVP_MD_CTX_cleanup(&mctx);
3272 EVP_PKEY_CTX_free(pctx);
3276 /* Check a certificate can be used for client authentication. Currently
3277 * check cert exists, if we have a suitable digest for TLS 1.2 if
3278 * static DH client certificates can be used and optionally checks
3279 * suitability for Suite B.
3281 static int ssl3_check_client_certificate(SSL *s)
3283 unsigned long alg_k;
3284 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3286 /* If no suitable signature algorithm can't use certificate */
3287 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3289 /* If strict mode check suitability of chain before using it.
3290 * This also adjusts suite B digest if necessary.
3292 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3293 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3295 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3296 /* See if we can use client certificate for fixed DH */
3297 if (alg_k & (SSL_kDHr|SSL_kDHd))
3299 SESS_CERT *scert = s->session->sess_cert;
3300 int i = scert->peer_cert_type;
3301 EVP_PKEY *clkey = NULL, *spkey = NULL;
3302 clkey = s->cert->key->privatekey;
3303 /* If client key not DH assume it can be used */
3304 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3307 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3310 /* Compare server and client parameters */
3311 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3312 EVP_PKEY_free(spkey);
3316 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3321 int ssl3_send_client_certificate(SSL *s)
3324 EVP_PKEY *pkey=NULL;
3327 if (s->state == SSL3_ST_CW_CERT_A)
3329 /* Let cert callback update client certificates if required */
3330 if (s->cert->cert_cb)
3332 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3335 s->rwstate=SSL_X509_LOOKUP;
3340 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3343 s->rwstate=SSL_NOTHING;
3345 if (ssl3_check_client_certificate(s))
3346 s->state=SSL3_ST_CW_CERT_C;
3348 s->state=SSL3_ST_CW_CERT_B;
3351 /* We need to get a client cert */
3352 if (s->state == SSL3_ST_CW_CERT_B)
3354 /* If we get an error, we need to
3355 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3356 * We then get retied later */
3358 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3361 s->rwstate=SSL_X509_LOOKUP;
3364 s->rwstate=SSL_NOTHING;
3365 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3367 s->state=SSL3_ST_CW_CERT_B;
3368 if ( !SSL_use_certificate(s,x509) ||
3369 !SSL_use_PrivateKey(s,pkey))
3375 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3378 if (x509 != NULL) X509_free(x509);
3379 if (pkey != NULL) EVP_PKEY_free(pkey);
3380 if (i && !ssl3_check_client_certificate(s))
3384 if (s->version == SSL3_VERSION)
3386 s->s3->tmp.cert_req=0;
3387 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3392 s->s3->tmp.cert_req=2;
3396 /* Ok, we have a cert */
3397 s->state=SSL3_ST_CW_CERT_C;
3400 if (s->state == SSL3_ST_CW_CERT_C)
3402 s->state=SSL3_ST_CW_CERT_D;
3403 if (!ssl3_output_cert_chain(s,
3404 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3406 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3407 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3411 /* SSL3_ST_CW_CERT_D */
3412 return ssl_do_write(s);
3415 #define has_bits(i,m) (((i)&(m)) == (m))
3417 int ssl3_check_cert_and_algorithm(SSL *s)
3421 EVP_PKEY *pkey=NULL;
3423 #ifndef OPENSSL_NO_RSA
3426 #ifndef OPENSSL_NO_DH
3430 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3431 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3433 /* we don't have a certificate */
3434 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3437 sc=s->session->sess_cert;
3440 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3444 #ifndef OPENSSL_NO_RSA
3445 rsa=s->session->sess_cert->peer_rsa_tmp;
3447 #ifndef OPENSSL_NO_DH
3448 dh=s->session->sess_cert->peer_dh_tmp;
3451 /* This is the passed certificate */
3453 idx=sc->peer_cert_type;
3454 #ifndef OPENSSL_NO_ECDH
3455 if (idx == SSL_PKEY_ECC)
3457 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3459 { /* check failed */
3460 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3468 else if (alg_a & SSL_aECDSA)
3470 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3473 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3475 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3479 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3480 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3481 EVP_PKEY_free(pkey);
3484 /* Check that we have a certificate if we require one */
3485 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3487 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3490 #ifndef OPENSSL_NO_DSA
3491 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3493 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3497 #ifndef OPENSSL_NO_RSA
3498 if ((alg_k & SSL_kRSA) &&
3499 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3501 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3505 #ifndef OPENSSL_NO_DH
3506 if ((alg_k & SSL_kDHE) &&
3507 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3509 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3512 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3513 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3515 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3518 #ifndef OPENSSL_NO_DSA
3519 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3520 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3522 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3528 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3530 #ifndef OPENSSL_NO_RSA
3531 if (alg_k & SSL_kRSA)
3534 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3536 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3542 #ifndef OPENSSL_NO_DH
3543 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3546 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3548 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3555 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3561 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3566 /* Check to see if handshake is full or resumed. Usually this is just a
3567 * case of checking to see if a cache hit has occurred. In the case of
3568 * session tickets we have to check the next message to be sure.
3571 #ifndef OPENSSL_NO_TLSEXT
3572 # ifndef OPENSSL_NO_NEXTPROTONEG
3573 int ssl3_send_next_proto(SSL *s)
3575 unsigned int len, padding_len;
3578 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3580 len = s->next_proto_negotiated_len;
3581 padding_len = 32 - ((len + 2) % 32);
3582 d = (unsigned char *)s->init_buf->data;
3584 memcpy(d + 5, s->next_proto_negotiated, len);
3585 d[5 + len] = padding_len;
3586 memset(d + 6 + len, 0, padding_len);
3587 *(d++)=SSL3_MT_NEXT_PROTO;
3588 l2n3(2 + len + padding_len, d);
3589 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3590 s->init_num = 4 + 2 + len + padding_len;
3594 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3598 int ssl3_check_finished(SSL *s)
3603 /* Read the message to see if it is supplemental data,
3604 * regardless if there is a session ticket this function is
3605 * called when we really expect a Certificate message, so
3606 * permit appropriate message length */
3607 n=s->method->ssl_get_message(s,
3613 if (!ok) return((int)n);
3614 s->s3->tmp.reuse_message = 1;
3616 if (s->s3->tmp.message_type == SSL3_MT_SUPPLEMENTAL_DATA)
3618 /* If we have no ticket it cannot be a resumed session. */
3619 if (!s->session->tlsext_tick)
3621 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3622 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3629 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3632 #ifndef OPENSSL_NO_ENGINE
3633 if (s->ctx->client_cert_engine)
3635 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3636 SSL_get_client_CA_list(s),
3637 px509, ppkey, NULL, NULL, NULL);
3642 if (s->ctx->client_cert_cb)
3643 i = s->ctx->client_cert_cb(s,px509,ppkey);
3647 #ifndef OPENSSL_NO_TLSEXT
3648 int tls1_send_client_supplemental_data(SSL *s, int *skip)
3651 if (s->ctx->cli_supp_data_records_count)
3653 unsigned char *p = NULL;
3654 unsigned char *size_loc = NULL;
3655 cli_supp_data_record *record = NULL;
3659 for (i = 0; i < s->ctx->cli_supp_data_records_count; i++)
3661 const unsigned char *out = NULL;
3662 unsigned short outlen = 0;
3664 record = &s->ctx->cli_supp_data_records[i];
3666 /* NULL callback or -1 omits supp data entry*/
3669 cb_retval = record->fn2(s, record->supp_data_type,
3672 if (cb_retval == -1)
3673 continue; /* skip this supp data entry */
3676 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3679 if (outlen == 0 || TLSEXT_MAXLEN_supplemental_data < outlen + 4 + length)
3681 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3684 /* if first entry, write handshake message type */
3687 if (!BUF_MEM_grow_clean(s->init_buf, 4))
3689 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3692 p = (unsigned char *)s->init_buf->data;
3693 *(p++) = SSL3_MT_SUPPLEMENTAL_DATA;
3694 /* update message length when all
3695 * callbacks complete */
3697 /* skip over handshake length field (3
3698 * bytes) and supp_data length field
3703 if (!BUF_MEM_grow(s->init_buf, outlen + 4))
3705 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3708 s2n(record->supp_data_type, p);
3710 memcpy(p, out, outlen);
3711 length += (outlen + 4);
3716 /* write handshake length */
3717 l2n3(length - 4, size_loc);
3718 /* supp_data length */
3719 l2n3(length - 7, size_loc);
3720 s->state = SSL3_ST_CW_SUPPLEMENTAL_DATA_B;
3721 s->init_num = length;
3723 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3727 /* no supp data message sent */
3734 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3738 int tls1_get_server_supplemental_data(SSL *s)
3743 const unsigned char *p, *d;
3744 unsigned short supp_data_entry_type = 0;
3745 unsigned short supp_data_entry_len = 0;
3746 unsigned long supp_data_len = 0;
3750 n=s->method->ssl_get_message(s,
3751 SSL3_ST_CR_SUPPLEMENTAL_DATA_A,
3752 SSL3_ST_CR_SUPPLEMENTAL_DATA_B,
3753 SSL3_MT_SUPPLEMENTAL_DATA,
3754 /* use default limit */
3755 TLSEXT_MAXLEN_supplemental_data,
3758 if (!ok) return((int)n);
3760 p = (unsigned char *)s->init_msg;
3762 /* The message cannot be empty */
3765 al = SSL_AD_DECODE_ERROR;
3766 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3769 n2l3(p, supp_data_len);
3770 while (p < d+supp_data_len)
3772 n2s(p, supp_data_entry_type);
3773 n2s(p, supp_data_entry_len);
3774 /* if there is a callback for this supp data type, send it */
3775 for (i=0; i < s->ctx->cli_supp_data_records_count; i++)
3777 if (s->ctx->cli_supp_data_records[i].supp_data_type == supp_data_entry_type &&
3778 s->ctx->cli_supp_data_records[i].fn1)
3780 cb_retval = s->ctx->cli_supp_data_records[i].fn1(s, supp_data_entry_type, p,
3781 supp_data_entry_len, &al,
3782 s->ctx->cli_supp_data_records[i].arg);
3785 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA, ERR_R_SSL_LIB);
3790 p += supp_data_entry_len;
3794 ssl3_send_alert(s,SSL3_AL_FATAL,al);