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 /* s->version=SSL3_VERSION; */
245 s->type=SSL_ST_CONNECT;
247 if (s->init_buf == NULL)
249 if ((buf=BUF_MEM_new()) == NULL)
254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
268 /* don't push the buffering BIO quite yet */
270 ssl3_init_finished_mac(s);
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->ctx->stats.sess_connect++;
277 case SSL3_ST_CW_CLNT_HELLO_A:
278 case SSL3_ST_CW_CLNT_HELLO_B:
281 ret=ssl3_client_hello(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio=BIO_push(s->bbio,s->wbio);
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret=ssl3_get_server_hello(s);
295 if (ret <= 0) goto end;
299 s->state=SSL3_ST_CR_FINISHED_A;
300 #ifndef OPENSSL_NO_TLSEXT
301 if (s->tlsext_ticket_expected)
303 /* receive renewed session ticket */
304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
310 #ifndef OPENSSL_NO_TLSEXT
311 /* The server hello indicated that
312 * an audit proof would follow. */
313 if (s->s3->tlsext_authz_server_promised)
314 s->state=SSL3_ST_CR_SUPPLEMENTAL_DATA_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;
338 if (s->tlsext_ticket_expected)
339 s->state=SSL3_ST_CR_SESSION_TICKET_A;
341 s->state=SSL3_ST_CR_FINISHED_A;
346 /* Check if it is anon DH/ECDH */
348 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
349 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
351 ret=ssl3_get_server_certificate(s);
352 if (ret <= 0) goto end;
353 #ifndef OPENSSL_NO_TLSEXT
354 if (s->tlsext_status_expected)
355 s->state=SSL3_ST_CR_CERT_STATUS_A;
357 s->state=SSL3_ST_CR_KEY_EXCH_A;
362 s->state=SSL3_ST_CR_KEY_EXCH_A;
369 s->state=SSL3_ST_CR_KEY_EXCH_A;
374 case SSL3_ST_CR_KEY_EXCH_A:
375 case SSL3_ST_CR_KEY_EXCH_B:
376 ret=ssl3_get_key_exchange(s);
377 if (ret <= 0) goto end;
378 s->state=SSL3_ST_CR_CERT_REQ_A;
381 /* at this point we check that we have the
382 * required stuff from the server */
383 if (!ssl3_check_cert_and_algorithm(s))
390 case SSL3_ST_CR_CERT_REQ_A:
391 case SSL3_ST_CR_CERT_REQ_B:
392 ret=ssl3_get_certificate_request(s);
393 if (ret <= 0) goto end;
394 s->state=SSL3_ST_CR_SRVR_DONE_A;
398 case SSL3_ST_CR_SRVR_DONE_A:
399 case SSL3_ST_CR_SRVR_DONE_B:
400 ret=ssl3_get_server_done(s);
401 if (ret <= 0) goto end;
402 #ifndef OPENSSL_NO_SRP
403 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
405 if ((ret = SRP_Calc_A_param(s))<=0)
407 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
408 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
413 if (s->s3->tmp.cert_req)
414 s->state=SSL3_ST_CW_CERT_A;
416 s->state=SSL3_ST_CW_KEY_EXCH_A;
421 case SSL3_ST_CW_CERT_A:
422 case SSL3_ST_CW_CERT_B:
423 case SSL3_ST_CW_CERT_C:
424 case SSL3_ST_CW_CERT_D:
425 ret=ssl3_send_client_certificate(s);
426 if (ret <= 0) goto end;
427 s->state=SSL3_ST_CW_KEY_EXCH_A;
431 case SSL3_ST_CW_KEY_EXCH_A:
432 case SSL3_ST_CW_KEY_EXCH_B:
433 ret=ssl3_send_client_key_exchange(s);
434 if (ret <= 0) goto end;
435 /* EAY EAY EAY need to check for DH fix cert
437 /* For TLS, cert_req is set to 2, so a cert chain
438 * of nothing is sent, but no verify packet is sent */
439 /* XXX: For now, we do not support client
440 * authentication in ECDH cipher suites with
441 * ECDH (rather than ECDSA) certificates.
442 * We need to skip the certificate verify
443 * message when client's ECDH public key is sent
444 * inside the client certificate.
446 if (s->s3->tmp.cert_req == 1)
448 s->state=SSL3_ST_CW_CERT_VRFY_A;
452 s->state=SSL3_ST_CW_CHANGE_A;
453 s->s3->change_cipher_spec=0;
455 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
457 s->state=SSL3_ST_CW_CHANGE_A;
458 s->s3->change_cipher_spec=0;
464 case SSL3_ST_CW_CERT_VRFY_A:
465 case SSL3_ST_CW_CERT_VRFY_B:
466 ret=ssl3_send_client_verify(s);
467 if (ret <= 0) goto end;
468 s->state=SSL3_ST_CW_CHANGE_A;
470 s->s3->change_cipher_spec=0;
473 case SSL3_ST_CW_CHANGE_A:
474 case SSL3_ST_CW_CHANGE_B:
475 ret=ssl3_send_change_cipher_spec(s,
476 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
477 if (ret <= 0) goto end;
479 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
480 s->state=SSL3_ST_CW_FINISHED_A;
482 if (s->s3->next_proto_neg_seen)
483 s->state=SSL3_ST_CW_NEXT_PROTO_A;
485 s->state=SSL3_ST_CW_FINISHED_A;
489 s->session->cipher=s->s3->tmp.new_cipher;
490 #ifdef OPENSSL_NO_COMP
491 s->session->compress_meth=0;
493 if (s->s3->tmp.new_compression == NULL)
494 s->session->compress_meth=0;
496 s->session->compress_meth=
497 s->s3->tmp.new_compression->id;
499 if (!s->method->ssl3_enc->setup_key_block(s))
505 if (!s->method->ssl3_enc->change_cipher_state(s,
506 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
514 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
515 case SSL3_ST_CW_NEXT_PROTO_A:
516 case SSL3_ST_CW_NEXT_PROTO_B:
517 ret=ssl3_send_next_proto(s);
518 if (ret <= 0) goto end;
519 s->state=SSL3_ST_CW_FINISHED_A;
523 case SSL3_ST_CW_FINISHED_A:
524 case SSL3_ST_CW_FINISHED_B:
525 ret=ssl3_send_finished(s,
526 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
527 s->method->ssl3_enc->client_finished_label,
528 s->method->ssl3_enc->client_finished_label_len);
529 if (ret <= 0) goto end;
530 s->state=SSL3_ST_CW_FLUSH;
533 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
536 s->s3->tmp.next_state=SSL_ST_OK;
537 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
540 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
541 s->s3->delay_buf_pop_ret=0;
546 #ifndef OPENSSL_NO_TLSEXT
547 /* Allow NewSessionTicket if ticket expected */
548 if (s->tlsext_ticket_expected)
549 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
553 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
558 #ifndef OPENSSL_NO_TLSEXT
559 case SSL3_ST_CR_SESSION_TICKET_A:
560 case SSL3_ST_CR_SESSION_TICKET_B:
561 ret=ssl3_get_new_session_ticket(s);
562 if (ret <= 0) goto end;
563 s->state=SSL3_ST_CR_FINISHED_A;
567 case SSL3_ST_CR_CERT_STATUS_A:
568 case SSL3_ST_CR_CERT_STATUS_B:
569 ret=ssl3_get_cert_status(s);
570 if (ret <= 0) goto end;
571 s->state=SSL3_ST_CR_KEY_EXCH_A;
576 case SSL3_ST_CR_FINISHED_A:
577 case SSL3_ST_CR_FINISHED_B:
579 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
580 SSL3_ST_CR_FINISHED_B);
581 if (ret <= 0) goto end;
584 s->state=SSL3_ST_CW_CHANGE_A;
590 case SSL3_ST_CW_FLUSH:
591 s->rwstate=SSL_WRITING;
592 if (BIO_flush(s->wbio) <= 0)
597 s->rwstate=SSL_NOTHING;
598 s->state=s->s3->tmp.next_state;
602 /* clean a few things up */
603 ssl3_cleanup_key_block(s);
605 if (s->init_buf != NULL)
607 BUF_MEM_free(s->init_buf);
611 /* If we are not 'joining' the last two packets,
612 * remove the buffering now */
613 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
614 ssl_free_wbio_buffer(s);
615 /* else do it later in ssl3_write */
621 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
622 if (s->hit) s->ctx->stats.sess_hit++;
626 s->handshake_func=ssl3_connect;
627 s->ctx->stats.sess_connect_good++;
629 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
635 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
641 /* did we do anything */
642 if (!s->s3->tmp.reuse_message && !skip)
646 if ((ret=BIO_flush(s->wbio)) <= 0)
650 if ((cb != NULL) && (s->state != state))
654 cb(s,SSL_CB_CONNECT_LOOP,1);
665 cb(s,SSL_CB_CONNECT_EXIT,ret);
670 int ssl3_client_hello(SSL *s)
675 unsigned long Time,l;
676 #ifndef OPENSSL_NO_COMP
681 buf=(unsigned char *)s->init_buf->data;
682 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
684 SSL_SESSION *sess = s->session;
685 if ((sess == NULL) ||
686 (sess->ssl_version != s->version) ||
687 #ifdef OPENSSL_NO_TLSEXT
688 !sess->session_id_length ||
690 (!sess->session_id_length && !sess->tlsext_tick) ||
692 (sess->not_resumable))
694 if (!ssl_get_new_session(s,0))
697 /* else use the pre-loaded session */
699 p=s->s3->client_random;
700 Time=(unsigned long)time(NULL); /* Time */
702 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
705 /* Do the message type and length last */
708 /* version indicates the negotiated version: for example from
709 * an SSLv2/v3 compatible client hello). The client_version
710 * field is the maximum version we permit and it is also
711 * used in RSA encrypted premaster secrets. Some servers can
712 * choke if we initially report a higher version then
713 * renegotiate to a lower one in the premaster secret. This
714 * didn't happen with TLS 1.0 as most servers supported it
715 * but it can with TLS 1.1 or later if the server only supports
718 * Possible scenario with previous logic:
719 * 1. Client hello indicates TLS 1.2
720 * 2. Server hello says TLS 1.0
721 * 3. RSA encrypted premaster secret uses 1.2.
722 * 4. Handhaked proceeds using TLS 1.0.
723 * 5. Server sends hello request to renegotiate.
724 * 6. Client hello indicates TLS v1.0 as we now
725 * know that is maximum server supports.
726 * 7. Server chokes on RSA encrypted premaster secret
727 * containing version 1.0.
729 * For interoperability it should be OK to always use the
730 * maximum version we support in client hello and then rely
731 * on the checking of version to ensure the servers isn't
732 * being inconsistent: for example initially negotiating with
733 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
734 * client_version in client hello and not resetting it to
735 * the negotiated version.
738 *(p++)=s->version>>8;
739 *(p++)=s->version&0xff;
740 s->client_version=s->version;
742 *(p++)=s->client_version>>8;
743 *(p++)=s->client_version&0xff;
747 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
754 i=s->session->session_id_length;
758 if (i > (int)sizeof(s->session->session_id))
760 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
763 memcpy(p,s->session->session_id,i);
767 /* Ciphers supported */
768 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
771 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
774 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
775 /* Some servers hang if client hello > 256 bytes
776 * as hack workaround chop number of supported ciphers
777 * to keep it well below this if we use TLS v1.2
779 if (TLS1_get_version(s) >= TLS1_2_VERSION
780 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
781 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
787 #ifdef OPENSSL_NO_COMP
791 if ((s->options & SSL_OP_NO_COMPRESSION)
792 || !s->ctx->comp_methods)
795 j=sk_SSL_COMP_num(s->ctx->comp_methods);
799 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
803 *(p++)=0; /* Add the NULL method */
805 #ifndef OPENSSL_NO_TLSEXT
807 if (ssl_prepare_clienthello_tlsext(s) <= 0)
809 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
812 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
814 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
821 *(d++)=SSL3_MT_CLIENT_HELLO;
824 s->state=SSL3_ST_CW_CLNT_HELLO_B;
825 /* number of bytes to write */
830 /* SSL3_ST_CW_CLNT_HELLO_B */
831 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
836 int ssl3_get_server_hello(SSL *s)
838 STACK_OF(SSL_CIPHER) *sk;
842 int i,al=SSL_AD_INTERNAL_ERROR,ok;
845 #ifndef OPENSSL_NO_COMP
849 n=s->method->ssl_get_message(s,
850 SSL3_ST_CR_SRVR_HELLO_A,
851 SSL3_ST_CR_SRVR_HELLO_B,
856 if (!ok) return((int)n);
858 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
860 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
862 if ( s->d1->send_cookie == 0)
864 s->s3->tmp.reuse_message = 1;
867 else /* already sent a cookie */
869 al=SSL_AD_UNEXPECTED_MESSAGE;
870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
876 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
878 al=SSL_AD_UNEXPECTED_MESSAGE;
879 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
883 d=p=(unsigned char *)s->init_msg;
885 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
887 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
888 s->version=(s->version&0xff00)|p[1];
889 al=SSL_AD_PROTOCOL_VERSION;
894 /* load the server hello data */
895 /* load the server random */
896 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
899 /* get the session-id */
902 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
904 al=SSL_AD_ILLEGAL_PARAMETER;
905 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
909 #ifndef OPENSSL_NO_TLSEXT
910 /* check if we want to resume the session based on external pre-shared secret */
911 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
913 SSL_CIPHER *pref_cipher=NULL;
914 s->session->master_key_length=sizeof(s->session->master_key);
915 if (s->tls_session_secret_cb(s, s->session->master_key,
916 &s->session->master_key_length,
918 s->tls_session_secret_cb_arg))
920 s->session->cipher = pref_cipher ?
921 pref_cipher : ssl_get_cipher_by_char(s, p+j);
924 #endif /* OPENSSL_NO_TLSEXT */
926 if (j != 0 && j == s->session->session_id_length
927 && memcmp(p,s->session->session_id,j) == 0)
929 if(s->sid_ctx_length != s->session->sid_ctx_length
930 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
932 /* actually a client application bug */
933 al=SSL_AD_ILLEGAL_PARAMETER;
934 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
939 else /* a miss or crap from the other end */
941 /* If we were trying for session-id reuse, make a new
942 * SSL_SESSION so we don't stuff up other people */
944 if (s->session->session_id_length > 0)
946 if (!ssl_get_new_session(s,0))
951 s->session->session_id_length=j;
952 memcpy(s->session->session_id,p,j); /* j could be 0 */
955 c=ssl_get_cipher_by_char(s,p);
959 al=SSL_AD_ILLEGAL_PARAMETER;
960 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
963 /* If it is a disabled cipher we didn't send it in client hello,
964 * so return an error.
966 if (c->algorithm_ssl & ct->mask_ssl ||
967 c->algorithm_mkey & ct->mask_k ||
968 c->algorithm_auth & ct->mask_a)
970 al=SSL_AD_ILLEGAL_PARAMETER;
971 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
974 p+=ssl_put_cipher_by_char(s,NULL,NULL);
976 sk=ssl_get_ciphers_by_id(s);
977 i=sk_SSL_CIPHER_find(sk,c);
980 /* we did not say we would use this cipher */
981 al=SSL_AD_ILLEGAL_PARAMETER;
982 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
986 /* Depending on the session caching (internal/external), the cipher
987 and/or cipher_id values may not be set. Make sure that
988 cipher_id is set and use it for comparison. */
989 if (s->session->cipher)
990 s->session->cipher_id = s->session->cipher->id;
991 if (s->hit && (s->session->cipher_id != c->id))
993 /* Workaround is now obsolete */
996 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
999 al=SSL_AD_ILLEGAL_PARAMETER;
1000 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1004 s->s3->tmp.new_cipher=c;
1005 /* Don't digest cached records if TLS v1.2: we may need them for
1006 * client authentication.
1008 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
1010 /* lets get the compression algorithm */
1012 #ifdef OPENSSL_NO_COMP
1015 al=SSL_AD_ILLEGAL_PARAMETER;
1016 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1019 /* If compression is disabled we'd better not try to resume a session
1020 * using compression.
1022 if (s->session->compress_meth != 0)
1024 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1029 if (s->hit && j != s->session->compress_meth)
1031 al=SSL_AD_ILLEGAL_PARAMETER;
1032 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1037 else if (s->options & SSL_OP_NO_COMPRESSION)
1039 al=SSL_AD_ILLEGAL_PARAMETER;
1040 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1044 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1046 if ((j != 0) && (comp == NULL))
1048 al=SSL_AD_ILLEGAL_PARAMETER;
1049 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1054 s->s3->tmp.new_compression=comp;
1058 #ifndef OPENSSL_NO_TLSEXT
1060 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1062 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1069 /* wrong packet length */
1070 al=SSL_AD_DECODE_ERROR;
1071 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1077 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1082 int ssl3_get_server_certificate(SSL *s)
1084 int al,i,ok,ret= -1;
1085 unsigned long n,nc,llen,l;
1087 const unsigned char *q,*p;
1089 STACK_OF(X509) *sk=NULL;
1091 EVP_PKEY *pkey=NULL;
1092 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1094 n=s->method->ssl_get_message(s,
1101 if (!ok) return((int)n);
1103 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1104 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1105 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1107 s->s3->tmp.reuse_message=1;
1111 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1113 al=SSL_AD_UNEXPECTED_MESSAGE;
1114 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1117 p=d=(unsigned char *)s->init_msg;
1119 if ((sk=sk_X509_new_null()) == NULL)
1121 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1128 al=SSL_AD_DECODE_ERROR;
1129 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1132 for (nc=0; nc<llen; )
1135 if ((l+nc+3) > llen)
1137 al=SSL_AD_DECODE_ERROR;
1138 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1143 x=d2i_X509(NULL,&q,l);
1146 al=SSL_AD_BAD_CERTIFICATE;
1147 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1152 al=SSL_AD_DECODE_ERROR;
1153 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1156 if (!sk_X509_push(sk,x))
1158 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1166 i=ssl_verify_cert_chain(s,sk);
1167 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1168 #ifndef OPENSSL_NO_KRB5
1169 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1170 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1171 #endif /* OPENSSL_NO_KRB5 */
1174 al=ssl_verify_alarm_type(s->verify_result);
1175 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1178 ERR_clear_error(); /* but we keep s->verify_result */
1180 sc=ssl_sess_cert_new();
1181 if (sc == NULL) goto err;
1183 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1184 s->session->sess_cert=sc;
1187 /* Inconsistency alert: cert_chain does include the peer's
1188 * certificate, which we don't include in s3_srvr.c */
1189 x=sk_X509_value(sk,0);
1191 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1193 pkey=X509_get_pubkey(x);
1195 /* VRS: allow null cert if auth == KRB5 */
1196 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1197 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1201 printf("pkey,x = %p, %p\n", pkey,x);
1202 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1203 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1204 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1205 #endif /* KSSL_DEBUG */
1207 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1211 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1212 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1216 i=ssl_cert_type(x,pkey);
1217 if (need_cert && i < 0)
1221 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1222 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1228 sc->peer_cert_type=i;
1229 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1230 /* Why would the following ever happen?
1231 * We just created sc a couple of lines ago. */
1232 if (sc->peer_pkeys[i].x509 != NULL)
1233 X509_free(sc->peer_pkeys[i].x509);
1234 sc->peer_pkeys[i].x509=x;
1235 sc->peer_key= &(sc->peer_pkeys[i]);
1237 if (s->session->peer != NULL)
1238 X509_free(s->session->peer);
1239 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1244 sc->peer_cert_type=i;
1247 if (s->session->peer != NULL)
1248 X509_free(s->session->peer);
1249 s->session->peer=NULL;
1251 s->session->verify_result = s->verify_result;
1254 #ifndef OPENSSL_NO_TLSEXT
1255 /* Check the audit proof. */
1256 if (s->ctx->tlsext_authz_server_audit_proof_cb)
1258 ret = s->ctx->tlsext_authz_server_audit_proof_cb(s,
1259 s->ctx->tlsext_authz_server_audit_proof_cb_arg);
1262 al = SSL_AD_BAD_CERTIFICATE;
1263 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_INVALID_AUDIT_PROOF);
1274 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1277 EVP_PKEY_free(pkey);
1279 sk_X509_pop_free(sk,X509_free);
1283 int ssl3_get_key_exchange(SSL *s)
1285 #ifndef OPENSSL_NO_RSA
1286 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1289 unsigned char *param,*p;
1290 int al,i,j,param_len,ok;
1292 EVP_PKEY *pkey=NULL;
1293 const EVP_MD *md = NULL;
1294 #ifndef OPENSSL_NO_RSA
1297 #ifndef OPENSSL_NO_DH
1300 #ifndef OPENSSL_NO_ECDH
1301 EC_KEY *ecdh = NULL;
1302 BN_CTX *bn_ctx = NULL;
1303 EC_POINT *srvr_ecpoint = NULL;
1305 int encoded_pt_len = 0;
1308 /* use same message size as in ssl3_get_certificate_request()
1309 * as ServerKeyExchange message may be skipped */
1310 n=s->method->ssl_get_message(s,
1311 SSL3_ST_CR_KEY_EXCH_A,
1312 SSL3_ST_CR_KEY_EXCH_B,
1316 if (!ok) return((int)n);
1318 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1320 #ifndef OPENSSL_NO_PSK
1321 /* In plain PSK ciphersuite, ServerKeyExchange can be
1322 omitted if no identity hint is sent. Set
1323 session->sess_cert anyway to avoid problems
1325 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1327 s->session->sess_cert=ssl_sess_cert_new();
1328 if (s->ctx->psk_identity_hint)
1329 OPENSSL_free(s->ctx->psk_identity_hint);
1330 s->ctx->psk_identity_hint = NULL;
1333 s->s3->tmp.reuse_message=1;
1337 param=p=(unsigned char *)s->init_msg;
1338 if (s->session->sess_cert != NULL)
1340 #ifndef OPENSSL_NO_RSA
1341 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1343 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1344 s->session->sess_cert->peer_rsa_tmp=NULL;
1347 #ifndef OPENSSL_NO_DH
1348 if (s->session->sess_cert->peer_dh_tmp)
1350 DH_free(s->session->sess_cert->peer_dh_tmp);
1351 s->session->sess_cert->peer_dh_tmp=NULL;
1354 #ifndef OPENSSL_NO_ECDH
1355 if (s->session->sess_cert->peer_ecdh_tmp)
1357 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1358 s->session->sess_cert->peer_ecdh_tmp=NULL;
1364 s->session->sess_cert=ssl_sess_cert_new();
1368 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1369 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1370 EVP_MD_CTX_init(&md_ctx);
1372 #ifndef OPENSSL_NO_PSK
1373 if (alg_k & SSL_kPSK)
1375 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1377 al=SSL_AD_HANDSHAKE_FAILURE;
1380 /* Store PSK identity hint for later use, hint is used
1381 * in ssl3_send_client_key_exchange. Assume that the
1382 * maximum length of a PSK identity hint can be as
1383 * long as the maximum length of a PSK identity. */
1384 if (i > PSK_MAX_IDENTITY_LEN)
1386 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1387 SSL_R_DATA_LENGTH_TOO_LONG);
1392 al=SSL_AD_DECODE_ERROR;
1393 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1394 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1397 /* If received PSK identity hint contains NULL
1398 * characters, the hint is truncated from the first
1399 * NULL. p may not be ending with NULL, so create a
1400 * NULL-terminated string. */
1401 memcpy(tmp_id_hint, p, i);
1402 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1403 if (s->ctx->psk_identity_hint != NULL)
1404 OPENSSL_free(s->ctx->psk_identity_hint);
1405 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1406 if (s->ctx->psk_identity_hint == NULL)
1408 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1416 #endif /* !OPENSSL_NO_PSK */
1417 #ifndef OPENSSL_NO_SRP
1418 if (alg_k & SSL_kSRP)
1424 al=SSL_AD_DECODE_ERROR;
1425 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1428 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1430 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1439 al=SSL_AD_DECODE_ERROR;
1440 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1443 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1445 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1450 i = (unsigned int)(p[0]);
1455 al=SSL_AD_DECODE_ERROR;
1456 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1459 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1461 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1470 al=SSL_AD_DECODE_ERROR;
1471 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1474 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1476 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1482 /* We must check if there is a certificate */
1483 #ifndef OPENSSL_NO_RSA
1484 if (alg_a & SSL_aRSA)
1485 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1490 #ifndef OPENSSL_NO_DSA
1491 else if (alg_a & SSL_aDSS)
1492 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1496 #endif /* !OPENSSL_NO_SRP */
1497 #ifndef OPENSSL_NO_RSA
1498 if (alg_k & SSL_kRSA)
1500 if ((rsa=RSA_new()) == NULL)
1502 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1509 al=SSL_AD_DECODE_ERROR;
1510 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1513 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1515 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1524 al=SSL_AD_DECODE_ERROR;
1525 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1528 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1530 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1536 /* this should be because we are using an export cipher */
1537 if (alg_a & SSL_aRSA)
1538 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1541 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1544 s->session->sess_cert->peer_rsa_tmp=rsa;
1547 #else /* OPENSSL_NO_RSA */
1551 #ifndef OPENSSL_NO_DH
1552 else if (alg_k & SSL_kEDH)
1554 if ((dh=DH_new()) == NULL)
1556 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1563 al=SSL_AD_DECODE_ERROR;
1564 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1567 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1569 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1578 al=SSL_AD_DECODE_ERROR;
1579 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1582 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1584 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1593 al=SSL_AD_DECODE_ERROR;
1594 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1597 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1599 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1605 #ifndef OPENSSL_NO_RSA
1606 if (alg_a & SSL_aRSA)
1607 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1612 #ifndef OPENSSL_NO_DSA
1613 else if (alg_a & SSL_aDSS)
1614 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1616 /* else anonymous DH, so no certificate or pkey. */
1618 s->session->sess_cert->peer_dh_tmp=dh;
1621 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1623 al=SSL_AD_ILLEGAL_PARAMETER;
1624 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1627 #endif /* !OPENSSL_NO_DH */
1629 #ifndef OPENSSL_NO_ECDH
1630 else if (alg_k & SSL_kEECDH)
1633 const EC_GROUP *group;
1635 if ((ecdh=EC_KEY_new()) == NULL)
1637 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1641 /* Extract elliptic curve parameters and the
1642 * server's ephemeral ECDH public key.
1643 * Keep accumulating lengths of various components in
1644 * param_len and make sure it never exceeds n.
1647 /* XXX: For now we only support named (not generic) curves
1648 * and the ECParameters in this case is just three bytes.
1651 /* Check curve is one of our prefrences, if not server has
1652 * sent an invalid curve.
1654 if (!tls1_check_curve(s, p, param_len))
1656 al=SSL_AD_DECODE_ERROR;
1657 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1661 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1663 al=SSL_AD_INTERNAL_ERROR;
1664 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1668 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1671 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1674 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1676 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1679 EC_GROUP_free(ngroup);
1681 group = EC_KEY_get0_group(ecdh);
1683 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1684 (EC_GROUP_get_degree(group) > 163))
1686 al=SSL_AD_EXPORT_RESTRICTION;
1687 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1693 /* Next, get the encoded ECPoint */
1694 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1695 ((bn_ctx = BN_CTX_new()) == NULL))
1697 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1701 encoded_pt_len = *p; /* length of encoded point */
1703 param_len += (1 + encoded_pt_len);
1704 if ((param_len > n) ||
1705 (EC_POINT_oct2point(group, srvr_ecpoint,
1706 p, encoded_pt_len, bn_ctx) == 0))
1708 al=SSL_AD_DECODE_ERROR;
1709 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1716 /* The ECC/TLS specification does not mention
1717 * the use of DSA to sign ECParameters in the server
1718 * key exchange message. We do support RSA and ECDSA.
1721 #ifndef OPENSSL_NO_RSA
1722 else if (alg_a & SSL_aRSA)
1723 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1725 #ifndef OPENSSL_NO_ECDSA
1726 else if (alg_a & SSL_aECDSA)
1727 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1729 /* else anonymous ECDH, so no certificate or pkey. */
1730 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1731 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1733 BN_CTX_free(bn_ctx);
1735 EC_POINT_free(srvr_ecpoint);
1736 srvr_ecpoint = NULL;
1740 al=SSL_AD_UNEXPECTED_MESSAGE;
1741 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1744 #endif /* !OPENSSL_NO_ECDH */
1747 /* p points to the next byte, there are 'n' bytes left */
1749 /* if it was signed, check the signature */
1752 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1754 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1759 al = SSL_AD_DECODE_ERROR;
1763 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1773 j=EVP_PKEY_size(pkey);
1775 if ((i != n) || (n > j) || (n <= 0))
1777 /* wrong packet length */
1778 al=SSL_AD_DECODE_ERROR;
1779 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1783 #ifndef OPENSSL_NO_RSA
1784 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1790 for (num=2; num > 0; num--)
1792 EVP_MD_CTX_set_flags(&md_ctx,
1793 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1794 EVP_DigestInit_ex(&md_ctx,(num == 2)
1795 ?s->ctx->md5:s->ctx->sha1, NULL);
1796 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1797 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1798 EVP_DigestUpdate(&md_ctx,param,param_len);
1799 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1803 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1807 al=SSL_AD_DECRYPT_ERROR;
1808 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1814 al=SSL_AD_DECRYPT_ERROR;
1815 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1822 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1823 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1824 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1825 EVP_VerifyUpdate(&md_ctx,param,param_len);
1826 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1829 al=SSL_AD_DECRYPT_ERROR;
1830 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1837 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1838 /* aNULL or kPSK do not need public keys */
1840 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1843 /* still data left over */
1846 al=SSL_AD_DECODE_ERROR;
1847 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1851 EVP_PKEY_free(pkey);
1852 EVP_MD_CTX_cleanup(&md_ctx);
1855 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1857 EVP_PKEY_free(pkey);
1858 #ifndef OPENSSL_NO_RSA
1862 #ifndef OPENSSL_NO_DH
1866 #ifndef OPENSSL_NO_ECDH
1867 BN_CTX_free(bn_ctx);
1868 EC_POINT_free(srvr_ecpoint);
1872 EVP_MD_CTX_cleanup(&md_ctx);
1876 int ssl3_get_certificate_request(SSL *s)
1879 unsigned long n,nc,l;
1880 unsigned int llen, ctype_num,i;
1882 const unsigned char *p,*q;
1884 STACK_OF(X509_NAME) *ca_sk=NULL;
1886 n=s->method->ssl_get_message(s,
1887 SSL3_ST_CR_CERT_REQ_A,
1888 SSL3_ST_CR_CERT_REQ_B,
1893 if (!ok) return((int)n);
1895 s->s3->tmp.cert_req=0;
1897 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1899 s->s3->tmp.reuse_message=1;
1900 /* If we get here we don't need any cached handshake records
1901 * as we wont be doing client auth.
1903 if (s->s3->handshake_buffer)
1905 if (!ssl3_digest_cached_records(s))
1911 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1913 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1914 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1918 /* TLS does not like anon-DH with client cert */
1919 if (s->version > SSL3_VERSION)
1921 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1923 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1924 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1929 p=d=(unsigned char *)s->init_msg;
1931 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1933 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1937 /* get the certificate types */
1939 if (s->cert->ctypes)
1941 OPENSSL_free(s->cert->ctypes);
1942 s->cert->ctypes = NULL;
1944 if (ctype_num > SSL3_CT_NUMBER)
1946 /* If we exceed static buffer copy all to cert structure */
1947 s->cert->ctypes = OPENSSL_malloc(ctype_num);
1948 memcpy(s->cert->ctypes, p, ctype_num);
1949 s->cert->ctype_num = (size_t)ctype_num;
1950 ctype_num=SSL3_CT_NUMBER;
1952 for (i=0; i<ctype_num; i++)
1953 s->s3->tmp.ctype[i]= p[i];
1955 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1958 /* Check we have enough room for signature algorithms and
1959 * following length value.
1961 if ((unsigned long)(p - d + llen + 2) > n)
1963 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1964 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1967 /* Clear certificate digests and validity flags */
1968 for (i = 0; i < SSL_PKEY_NUM; i++)
1970 s->cert->pkeys[i].digest = NULL;
1971 s->cert->pkeys[i].valid_flags = 0;
1973 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1975 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1976 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1982 /* get the CA RDNs */
1987 out=fopen("/tmp/vsign.der","w");
1988 fwrite(p,1,llen,out);
1993 if ((unsigned long)(p - d + llen) != n)
1995 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1996 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2000 for (nc=0; nc<llen; )
2003 if ((l+nc+2) > llen)
2005 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2006 goto cont; /* netscape bugs */
2007 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2008 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2014 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2016 /* If netscape tolerance is on, ignore errors */
2017 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2021 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2022 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2029 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2030 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2033 if (!sk_X509_NAME_push(ca_sk,xn))
2035 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2049 /* we should setup a certificate to return.... */
2050 s->s3->tmp.cert_req=1;
2051 s->s3->tmp.ctype_num=ctype_num;
2052 if (s->s3->tmp.ca_names != NULL)
2053 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2054 s->s3->tmp.ca_names=ca_sk;
2059 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2063 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2065 return(X509_NAME_cmp(*a,*b));
2067 #ifndef OPENSSL_NO_TLSEXT
2068 int ssl3_get_new_session_ticket(SSL *s)
2070 int ok,al,ret=0, ticklen;
2072 const unsigned char *p;
2075 n=s->method->ssl_get_message(s,
2076 SSL3_ST_CR_SESSION_TICKET_A,
2077 SSL3_ST_CR_SESSION_TICKET_B,
2085 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2087 s->s3->tmp.reuse_message=1;
2090 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2092 al=SSL_AD_UNEXPECTED_MESSAGE;
2093 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2098 /* need at least ticket_lifetime_hint + ticket length */
2099 al = SSL_AD_DECODE_ERROR;
2100 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2104 p=d=(unsigned char *)s->init_msg;
2105 n2l(p, s->session->tlsext_tick_lifetime_hint);
2107 /* ticket_lifetime_hint + ticket_length + ticket */
2108 if (ticklen + 6 != n)
2110 al = SSL_AD_DECODE_ERROR;
2111 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2114 if (s->session->tlsext_tick)
2116 OPENSSL_free(s->session->tlsext_tick);
2117 s->session->tlsext_ticklen = 0;
2119 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2120 if (!s->session->tlsext_tick)
2122 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2125 memcpy(s->session->tlsext_tick, p, ticklen);
2126 s->session->tlsext_ticklen = ticklen;
2127 /* There are two ways to detect a resumed ticket sesion.
2128 * One is to set an appropriate session ID and then the server
2129 * must return a match in ServerHello. This allows the normal
2130 * client session ID matching to work and we know much
2131 * earlier that the ticket has been accepted.
2133 * The other way is to set zero length session ID when the
2134 * ticket is presented and rely on the handshake to determine
2135 * session resumption.
2137 * We choose the former approach because this fits in with
2138 * assumptions elsewhere in OpenSSL. The session ID is set
2139 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2142 EVP_Digest(p, ticklen,
2143 s->session->session_id, &s->session->session_id_length,
2144 #ifndef OPENSSL_NO_SHA256
2145 EVP_sha256(), NULL);
2152 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2157 int ssl3_get_cert_status(SSL *s)
2160 unsigned long resplen,n;
2161 const unsigned char *p;
2163 n=s->method->ssl_get_message(s,
2164 SSL3_ST_CR_CERT_STATUS_A,
2165 SSL3_ST_CR_CERT_STATUS_B,
2166 SSL3_MT_CERTIFICATE_STATUS,
2170 if (!ok) return((int)n);
2173 /* need at least status type + length */
2174 al = SSL_AD_DECODE_ERROR;
2175 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2178 p = (unsigned char *)s->init_msg;
2179 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2181 al = SSL_AD_DECODE_ERROR;
2182 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2186 if (resplen + 4 != n)
2188 al = SSL_AD_DECODE_ERROR;
2189 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2192 if (s->tlsext_ocsp_resp)
2193 OPENSSL_free(s->tlsext_ocsp_resp);
2194 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2195 if (!s->tlsext_ocsp_resp)
2197 al = SSL_AD_INTERNAL_ERROR;
2198 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2201 s->tlsext_ocsp_resplen = resplen;
2202 if (s->ctx->tlsext_status_cb)
2205 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2208 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2209 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2214 al = SSL_AD_INTERNAL_ERROR;
2215 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2221 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2226 int ssl3_get_server_done(SSL *s)
2231 n=s->method->ssl_get_message(s,
2232 SSL3_ST_CR_SRVR_DONE_A,
2233 SSL3_ST_CR_SRVR_DONE_B,
2234 SSL3_MT_SERVER_DONE,
2235 30, /* should be very small, like 0 :-) */
2238 if (!ok) return((int)n);
2241 /* should contain no data */
2242 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2243 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2251 int ssl3_send_client_key_exchange(SSL *s)
2253 unsigned char *p,*d;
2255 unsigned long alg_k;
2256 #ifndef OPENSSL_NO_RSA
2258 EVP_PKEY *pkey=NULL;
2260 #ifndef OPENSSL_NO_KRB5
2262 #endif /* OPENSSL_NO_KRB5 */
2263 #ifndef OPENSSL_NO_ECDH
2264 EC_KEY *clnt_ecdh = NULL;
2265 const EC_POINT *srvr_ecpoint = NULL;
2266 EVP_PKEY *srvr_pub_pkey = NULL;
2267 unsigned char *encodedPoint = NULL;
2268 int encoded_pt_len = 0;
2269 BN_CTX * bn_ctx = NULL;
2272 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2274 d=(unsigned char *)s->init_buf->data;
2277 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2279 /* Fool emacs indentation */
2281 #ifndef OPENSSL_NO_RSA
2282 else if (alg_k & SSL_kRSA)
2285 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2287 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2288 rsa=s->session->sess_cert->peer_rsa_tmp;
2291 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2292 if ((pkey == NULL) ||
2293 (pkey->type != EVP_PKEY_RSA) ||
2294 (pkey->pkey.rsa == NULL))
2296 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2300 EVP_PKEY_free(pkey);
2303 tmp_buf[0]=s->client_version>>8;
2304 tmp_buf[1]=s->client_version&0xff;
2305 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2308 s->session->master_key_length=sizeof tmp_buf;
2311 /* Fix buf for TLS and beyond */
2312 if (s->version > SSL3_VERSION)
2314 n=RSA_public_encrypt(sizeof tmp_buf,
2315 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2317 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2318 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2322 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2326 /* Fix buf for TLS and beyond */
2327 if (s->version > SSL3_VERSION)
2333 s->session->master_key_length=
2334 s->method->ssl3_enc->generate_master_secret(s,
2335 s->session->master_key,
2336 tmp_buf,sizeof tmp_buf);
2337 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2340 #ifndef OPENSSL_NO_KRB5
2341 else if (alg_k & SSL_kKRB5)
2343 krb5_error_code krb5rc;
2344 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2345 /* krb5_data krb5_ap_req; */
2346 krb5_data *enc_ticket;
2347 krb5_data authenticator, *authp = NULL;
2348 EVP_CIPHER_CTX ciph_ctx;
2349 const EVP_CIPHER *enc = NULL;
2350 unsigned char iv[EVP_MAX_IV_LENGTH];
2351 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2352 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2353 + EVP_MAX_IV_LENGTH];
2354 int padl, outl = sizeof(epms);
2356 EVP_CIPHER_CTX_init(&ciph_ctx);
2359 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2361 #endif /* KSSL_DEBUG */
2365 if (KRB5SENDAUTH) authp = &authenticator;
2366 #endif /* KRB5SENDAUTH */
2368 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2370 enc = kssl_map_enc(kssl_ctx->enctype);
2375 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2376 if (krb5rc && kssl_err.text)
2377 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2379 #endif /* KSSL_DEBUG */
2383 ssl3_send_alert(s,SSL3_AL_FATAL,
2384 SSL_AD_HANDSHAKE_FAILURE);
2385 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2390 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2391 ** in place of RFC 2712 KerberosWrapper, as in:
2393 ** Send ticket (copy to *p, set n = length)
2394 ** n = krb5_ap_req.length;
2395 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2396 ** if (krb5_ap_req.data)
2397 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2399 ** Now using real RFC 2712 KerberosWrapper
2400 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2401 ** Note: 2712 "opaque" types are here replaced
2402 ** with a 2-byte length followed by the value.
2404 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2405 ** Where "xx xx" = length bytes. Shown here with
2406 ** optional authenticator omitted.
2409 /* KerberosWrapper.Ticket */
2410 s2n(enc_ticket->length,p);
2411 memcpy(p, enc_ticket->data, enc_ticket->length);
2412 p+= enc_ticket->length;
2413 n = enc_ticket->length + 2;
2415 /* KerberosWrapper.Authenticator */
2416 if (authp && authp->length)
2418 s2n(authp->length,p);
2419 memcpy(p, authp->data, authp->length);
2421 n+= authp->length + 2;
2429 s2n(0,p);/* null authenticator length */
2433 tmp_buf[0]=s->client_version>>8;
2434 tmp_buf[1]=s->client_version&0xff;
2435 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2438 /* 20010420 VRS. Tried it this way; failed.
2439 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2440 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2441 ** kssl_ctx->length);
2442 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2445 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2446 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2448 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2450 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2452 if (outl > (int)sizeof epms)
2454 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2457 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2459 /* KerberosWrapper.EncryptedPreMasterSecret */
2461 memcpy(p, epms, outl);
2465 s->session->master_key_length=
2466 s->method->ssl3_enc->generate_master_secret(s,
2467 s->session->master_key,
2468 tmp_buf, sizeof tmp_buf);
2470 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2471 OPENSSL_cleanse(epms, outl);
2474 #ifndef OPENSSL_NO_DH
2475 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2477 DH *dh_srvr,*dh_clnt;
2478 SESS_CERT *scert = s->session->sess_cert;
2482 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2483 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2487 if (scert->peer_dh_tmp != NULL)
2488 dh_srvr=scert->peer_dh_tmp;
2491 /* we get them from the cert */
2492 int idx = scert->peer_cert_type;
2493 EVP_PKEY *spkey = NULL;
2496 spkey = X509_get_pubkey(
2497 scert->peer_pkeys[idx].x509);
2500 dh_srvr = EVP_PKEY_get1_DH(spkey);
2501 EVP_PKEY_free(spkey);
2503 if (dh_srvr == NULL)
2505 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2506 ERR_R_INTERNAL_ERROR);
2510 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2512 /* Use client certificate key */
2513 EVP_PKEY *clkey = s->cert->key->privatekey;
2516 dh_clnt = EVP_PKEY_get1_DH(clkey);
2517 if (dh_clnt == NULL)
2519 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2520 ERR_R_INTERNAL_ERROR);
2526 /* generate a new random key */
2527 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2529 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2532 if (!DH_generate_key(dh_clnt))
2534 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2540 /* use the 'p' output buffer for the DH key, but
2541 * make sure to clear it out afterwards */
2543 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2544 if (scert->peer_dh_tmp == NULL)
2549 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2554 /* generate master key from the result */
2555 s->session->master_key_length=
2556 s->method->ssl3_enc->generate_master_secret(s,
2557 s->session->master_key,p,n);
2561 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2565 /* send off the data */
2566 n=BN_num_bytes(dh_clnt->pub_key);
2568 BN_bn2bin(dh_clnt->pub_key,p);
2574 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2578 #ifndef OPENSSL_NO_ECDH
2579 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2581 const EC_GROUP *srvr_group = NULL;
2583 int ecdh_clnt_cert = 0;
2586 /* Did we send out the client's
2587 * ECDH share for use in premaster
2588 * computation as part of client certificate?
2589 * If so, set ecdh_clnt_cert to 1.
2591 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2593 /* XXX: For now, we do not support client
2594 * authentication using ECDH certificates.
2595 * To add such support, one needs to add
2596 * code that checks for appropriate
2597 * conditions and sets ecdh_clnt_cert to 1.
2598 * For example, the cert have an ECC
2599 * key on the same curve as the server's
2600 * and the key should be authorized for
2603 * One also needs to add code in ssl3_connect
2604 * to skip sending the certificate verify
2607 * if ((s->cert->key->privatekey != NULL) &&
2608 * (s->cert->key->privatekey->type ==
2609 * EVP_PKEY_EC) && ...)
2610 * ecdh_clnt_cert = 1;
2614 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2616 tkey = s->session->sess_cert->peer_ecdh_tmp;
2620 /* Get the Server Public Key from Cert */
2621 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2622 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2623 if ((srvr_pub_pkey == NULL) ||
2624 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2625 (srvr_pub_pkey->pkey.ec == NULL))
2627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2628 ERR_R_INTERNAL_ERROR);
2632 tkey = srvr_pub_pkey->pkey.ec;
2635 srvr_group = EC_KEY_get0_group(tkey);
2636 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2638 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2640 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2641 ERR_R_INTERNAL_ERROR);
2645 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2647 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2651 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2653 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2658 /* Reuse key info from our certificate
2659 * We only need our private key to perform
2660 * the ECDH computation.
2662 const BIGNUM *priv_key;
2663 tkey = s->cert->key->privatekey->pkey.ec;
2664 priv_key = EC_KEY_get0_private_key(tkey);
2665 if (priv_key == NULL)
2667 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2670 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2672 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2678 /* Generate a new ECDH key pair */
2679 if (!(EC_KEY_generate_key(clnt_ecdh)))
2681 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2686 /* use the 'p' output buffer for the ECDH key, but
2687 * make sure to clear it out afterwards
2690 field_size = EC_GROUP_get_degree(srvr_group);
2691 if (field_size <= 0)
2693 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2697 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2700 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2705 /* generate master key from the result */
2706 s->session->master_key_length = s->method->ssl3_enc \
2707 -> generate_master_secret(s,
2708 s->session->master_key,
2711 memset(p, 0, n); /* clean up */
2715 /* Send empty client key exch message */
2720 /* First check the size of encoding and
2721 * allocate memory accordingly.
2724 EC_POINT_point2oct(srvr_group,
2725 EC_KEY_get0_public_key(clnt_ecdh),
2726 POINT_CONVERSION_UNCOMPRESSED,
2729 encodedPoint = (unsigned char *)
2730 OPENSSL_malloc(encoded_pt_len *
2731 sizeof(unsigned char));
2732 bn_ctx = BN_CTX_new();
2733 if ((encodedPoint == NULL) ||
2736 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2740 /* Encode the public key */
2741 n = EC_POINT_point2oct(srvr_group,
2742 EC_KEY_get0_public_key(clnt_ecdh),
2743 POINT_CONVERSION_UNCOMPRESSED,
2744 encodedPoint, encoded_pt_len, bn_ctx);
2746 *p = n; /* length of encoded point */
2747 /* Encoded point will be copied here */
2749 /* copy the point */
2750 memcpy((unsigned char *)p, encodedPoint, n);
2751 /* increment n to account for length field */
2755 /* Free allocated memory */
2756 BN_CTX_free(bn_ctx);
2757 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2758 if (clnt_ecdh != NULL)
2759 EC_KEY_free(clnt_ecdh);
2760 EVP_PKEY_free(srvr_pub_pkey);
2762 #endif /* !OPENSSL_NO_ECDH */
2763 else if (alg_k & SSL_kGOST)
2765 /* GOST key exchange message creation */
2766 EVP_PKEY_CTX *pkey_ctx;
2769 unsigned int md_len;
2771 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2772 EVP_MD_CTX *ukm_hash;
2775 /* Get server sertificate PKEY and create ctx from it */
2776 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2778 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2780 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2784 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2785 /* If we have send a certificate, and certificate key
2787 * parameters match those of server certificate, use
2788 * certificate key for key exchange
2791 /* Otherwise, generate ephemeral key pair */
2793 EVP_PKEY_encrypt_init(pkey_ctx);
2794 /* Generate session key */
2795 RAND_bytes(premaster_secret,32);
2796 /* If we have client certificate, use its secret as peer key */
2797 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2798 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2799 /* If there was an error - just ignore it. Ephemeral key
2805 /* Compute shared IV and store it in algorithm-specific
2807 ukm_hash = EVP_MD_CTX_create();
2808 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2809 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2810 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2811 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2812 EVP_MD_CTX_destroy(ukm_hash);
2813 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2815 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2819 /* Make GOST keytransport blob message */
2820 /*Encapsulate it into sequence */
2821 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2823 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2824 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2831 *(p++)= msglen & 0xff;
2836 *(p++)= msglen & 0xff;
2839 memcpy(p, tmp, msglen);
2840 /* Check if pubkey from client certificate was used */
2841 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2843 /* Set flag "skip certificate verify" */
2844 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2846 EVP_PKEY_CTX_free(pkey_ctx);
2847 s->session->master_key_length=
2848 s->method->ssl3_enc->generate_master_secret(s,
2849 s->session->master_key,premaster_secret,32);
2850 EVP_PKEY_free(pub_key);
2853 #ifndef OPENSSL_NO_SRP
2854 else if (alg_k & SSL_kSRP)
2856 if (s->srp_ctx.A != NULL)
2858 /* send off the data */
2859 n=BN_num_bytes(s->srp_ctx.A);
2861 BN_bn2bin(s->srp_ctx.A,p);
2866 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2869 if (s->session->srp_username != NULL)
2870 OPENSSL_free(s->session->srp_username);
2871 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2872 if (s->session->srp_username == NULL)
2874 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2875 ERR_R_MALLOC_FAILURE);
2879 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2881 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2886 #ifndef OPENSSL_NO_PSK
2887 else if (alg_k & SSL_kPSK)
2889 char identity[PSK_MAX_IDENTITY_LEN];
2890 unsigned char *t = NULL;
2891 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2892 unsigned int pre_ms_len = 0, psk_len = 0;
2896 if (s->psk_client_callback == NULL)
2898 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2899 SSL_R_PSK_NO_CLIENT_CB);
2903 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2904 identity, PSK_MAX_IDENTITY_LEN,
2905 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2906 if (psk_len > PSK_MAX_PSK_LEN)
2908 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2909 ERR_R_INTERNAL_ERROR);
2912 else if (psk_len == 0)
2914 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2915 SSL_R_PSK_IDENTITY_NOT_FOUND);
2919 /* create PSK pre_master_secret */
2920 pre_ms_len = 2+psk_len+2+psk_len;
2922 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2924 memset(t, 0, psk_len);
2928 if (s->session->psk_identity_hint != NULL)
2929 OPENSSL_free(s->session->psk_identity_hint);
2930 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2931 if (s->ctx->psk_identity_hint != NULL &&
2932 s->session->psk_identity_hint == NULL)
2934 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2935 ERR_R_MALLOC_FAILURE);
2939 if (s->session->psk_identity != NULL)
2940 OPENSSL_free(s->session->psk_identity);
2941 s->session->psk_identity = BUF_strdup(identity);
2942 if (s->session->psk_identity == NULL)
2944 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2945 ERR_R_MALLOC_FAILURE);
2949 s->session->master_key_length =
2950 s->method->ssl3_enc->generate_master_secret(s,
2951 s->session->master_key,
2952 psk_or_pre_ms, pre_ms_len);
2953 n = strlen(identity);
2955 memcpy(p, identity, n);
2959 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2960 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2963 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2970 ssl3_send_alert(s, SSL3_AL_FATAL,
2971 SSL_AD_HANDSHAKE_FAILURE);
2972 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2973 ERR_R_INTERNAL_ERROR);
2977 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2980 s->state=SSL3_ST_CW_KEY_EXCH_B;
2981 /* number of bytes to write */
2986 /* SSL3_ST_CW_KEY_EXCH_B */
2987 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2989 #ifndef OPENSSL_NO_ECDH
2990 BN_CTX_free(bn_ctx);
2991 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2992 if (clnt_ecdh != NULL)
2993 EC_KEY_free(clnt_ecdh);
2994 EVP_PKEY_free(srvr_pub_pkey);
2999 int ssl3_send_client_verify(SSL *s)
3001 unsigned char *p,*d;
3002 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3004 EVP_PKEY_CTX *pctx=NULL;
3010 EVP_MD_CTX_init(&mctx);
3012 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3014 d=(unsigned char *)s->init_buf->data;
3016 pkey=s->cert->key->privatekey;
3017 /* Create context from key and test if sha1 is allowed as digest */
3018 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3019 EVP_PKEY_sign_init(pctx);
3020 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3022 if (TLS1_get_version(s) < TLS1_2_VERSION)
3023 s->method->ssl3_enc->cert_verify_mac(s,
3025 &(data[MD5_DIGEST_LENGTH]));
3031 /* For TLS v1.2 send signature algorithm and signature
3032 * using agreed digest and cached handshake records.
3034 if (TLS1_get_version(s) >= TLS1_2_VERSION)
3038 const EVP_MD *md = s->cert->key->digest;
3039 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3041 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3043 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3044 ERR_R_INTERNAL_ERROR);
3049 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3052 if (!EVP_SignInit_ex(&mctx, md, NULL)
3053 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3054 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3056 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3062 if (!ssl3_digest_cached_records(s))
3066 #ifndef OPENSSL_NO_RSA
3067 if (pkey->type == EVP_PKEY_RSA)
3069 s->method->ssl3_enc->cert_verify_mac(s,
3072 if (RSA_sign(NID_md5_sha1, data,
3073 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3074 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3076 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3084 #ifndef OPENSSL_NO_DSA
3085 if (pkey->type == EVP_PKEY_DSA)
3087 if (!DSA_sign(pkey->save_type,
3088 &(data[MD5_DIGEST_LENGTH]),
3089 SHA_DIGEST_LENGTH,&(p[2]),
3090 (unsigned int *)&j,pkey->pkey.dsa))
3092 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3100 #ifndef OPENSSL_NO_ECDSA
3101 if (pkey->type == EVP_PKEY_EC)
3103 if (!ECDSA_sign(pkey->save_type,
3104 &(data[MD5_DIGEST_LENGTH]),
3105 SHA_DIGEST_LENGTH,&(p[2]),
3106 (unsigned int *)&j,pkey->pkey.ec))
3108 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3117 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3119 unsigned char signbuf[64];
3122 s->method->ssl3_enc->cert_verify_mac(s,
3123 NID_id_GostR3411_94,
3125 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3126 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3127 ERR_R_INTERNAL_ERROR);
3130 for (i=63,j=0; i>=0; j++, i--) {
3138 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3141 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3144 s->state=SSL3_ST_CW_CERT_VRFY_B;
3145 s->init_num=(int)n+4;
3148 EVP_MD_CTX_cleanup(&mctx);
3149 EVP_PKEY_CTX_free(pctx);
3150 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3152 EVP_MD_CTX_cleanup(&mctx);
3153 EVP_PKEY_CTX_free(pctx);
3157 /* Check a certificate can be used for client authentication. Currently
3158 * check cert exists, if we have a suitable digest for TLS 1.2 and if
3159 * static DH client certificates can be used.
3161 static int ssl3_check_client_certificate(SSL *s)
3163 unsigned long alg_k;
3164 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3166 /* If no suitable signature algorithm can't use certificate */
3167 if (TLS1_get_version(s) >= TLS1_2_VERSION && !s->cert->key->digest)
3169 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3170 /* See if we can use client certificate for fixed DH */
3171 if (alg_k & (SSL_kDHr|SSL_kDHd))
3173 SESS_CERT *scert = s->session->sess_cert;
3174 int i = scert->peer_cert_type;
3175 EVP_PKEY *clkey = NULL, *spkey = NULL;
3176 clkey = s->cert->key->privatekey;
3177 /* If client key not DH assume it can be used */
3178 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3181 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3184 /* Compare server and client parameters */
3185 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3186 EVP_PKEY_free(spkey);
3190 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3195 int ssl3_send_client_certificate(SSL *s)
3198 EVP_PKEY *pkey=NULL;
3202 if (s->state == SSL3_ST_CW_CERT_A)
3204 /* Let cert callback update client certificates if required */
3205 if (s->cert->cert_cb
3206 && s->cert->cert_cb(s, s->cert->cert_cb_arg) <= 0)
3208 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3211 if (ssl3_check_client_certificate(s))
3212 s->state=SSL3_ST_CW_CERT_C;
3214 s->state=SSL3_ST_CW_CERT_B;
3217 /* We need to get a client cert */
3218 if (s->state == SSL3_ST_CW_CERT_B)
3220 /* If we get an error, we need to
3221 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3222 * We then get retied later */
3224 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3227 s->rwstate=SSL_X509_LOOKUP;
3230 s->rwstate=SSL_NOTHING;
3231 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3233 s->state=SSL3_ST_CW_CERT_B;
3234 if ( !SSL_use_certificate(s,x509) ||
3235 !SSL_use_PrivateKey(s,pkey))
3241 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3244 if (x509 != NULL) X509_free(x509);
3245 if (pkey != NULL) EVP_PKEY_free(pkey);
3246 if (i && !ssl3_check_client_certificate(s))
3250 if (s->version == SSL3_VERSION)
3252 s->s3->tmp.cert_req=0;
3253 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3258 s->s3->tmp.cert_req=2;
3262 /* Ok, we have a cert */
3263 s->state=SSL3_ST_CW_CERT_C;
3266 if (s->state == SSL3_ST_CW_CERT_C)
3268 s->state=SSL3_ST_CW_CERT_D;
3269 l=ssl3_output_cert_chain(s,
3270 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3274 /* SSL3_ST_CW_CERT_D */
3275 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3278 #define has_bits(i,m) (((i)&(m)) == (m))
3280 int ssl3_check_cert_and_algorithm(SSL *s)
3284 EVP_PKEY *pkey=NULL;
3286 #ifndef OPENSSL_NO_RSA
3289 #ifndef OPENSSL_NO_DH
3293 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3294 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3296 /* we don't have a certificate */
3297 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3300 sc=s->session->sess_cert;
3303 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3307 #ifndef OPENSSL_NO_RSA
3308 rsa=s->session->sess_cert->peer_rsa_tmp;
3310 #ifndef OPENSSL_NO_DH
3311 dh=s->session->sess_cert->peer_dh_tmp;
3314 /* This is the passed certificate */
3316 idx=sc->peer_cert_type;
3317 #ifndef OPENSSL_NO_ECDH
3318 if (idx == SSL_PKEY_ECC)
3320 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3322 { /* check failed */
3323 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3332 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3333 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3334 EVP_PKEY_free(pkey);
3337 /* Check that we have a certificate if we require one */
3338 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3340 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3343 #ifndef OPENSSL_NO_DSA
3344 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3346 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3350 #ifndef OPENSSL_NO_RSA
3351 if ((alg_k & SSL_kRSA) &&
3352 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3354 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3358 #ifndef OPENSSL_NO_DH
3359 if ((alg_k & SSL_kEDH) &&
3360 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3362 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3365 else if ((alg_k & SSL_kDHr) && (TLS1_get_version(s) < TLS1_2_VERSION) &&
3366 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3368 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3371 #ifndef OPENSSL_NO_DSA
3372 else if ((alg_k & SSL_kDHd) && (TLS1_get_version(s) < TLS1_2_VERSION) &&
3373 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3375 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3381 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3383 #ifndef OPENSSL_NO_RSA
3384 if (alg_k & SSL_kRSA)
3387 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3389 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3395 #ifndef OPENSSL_NO_DH
3396 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3399 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3401 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3408 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3414 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3419 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3420 int ssl3_send_next_proto(SSL *s)
3422 unsigned int len, padding_len;
3425 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3427 len = s->next_proto_negotiated_len;
3428 padding_len = 32 - ((len + 2) % 32);
3429 d = (unsigned char *)s->init_buf->data;
3431 memcpy(d + 5, s->next_proto_negotiated, len);
3432 d[5 + len] = padding_len;
3433 memset(d + 6 + len, 0, padding_len);
3434 *(d++)=SSL3_MT_NEXT_PROTO;
3435 l2n3(2 + len + padding_len, d);
3436 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3437 s->init_num = 4 + 2 + len + padding_len;
3441 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3443 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3445 /* Check to see if handshake is full or resumed. Usually this is just a
3446 * case of checking to see if a cache hit has occurred. In the case of
3447 * session tickets we have to check the next message to be sure.
3450 #ifndef OPENSSL_NO_TLSEXT
3451 int ssl3_check_finished(SSL *s)
3455 /* If we have no ticket it cannot be a resumed session. */
3456 if (!s->session->tlsext_tick)
3458 /* this function is called when we really expect a Certificate
3459 * message, so permit appropriate message length */
3460 n=s->method->ssl_get_message(s,
3466 if (!ok) return((int)n);
3467 s->s3->tmp.reuse_message = 1;
3468 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3469 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3476 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3479 #ifndef OPENSSL_NO_ENGINE
3480 if (s->ctx->client_cert_engine)
3482 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3483 SSL_get_client_CA_list(s),
3484 px509, ppkey, NULL, NULL, NULL);
3489 if (s->ctx->client_cert_cb)
3490 i = s->ctx->client_cert_cb(s,px509,ppkey);
3494 #ifndef OPENSSL_NO_TLSEXT
3495 int tls1_get_server_supplemental_data(SSL *s)
3499 unsigned long supp_data_len, authz_data_len;
3501 unsigned short supp_data_type, authz_data_type, proof_len;
3502 const unsigned char *p;
3503 unsigned char *new_proof;
3505 n=s->method->ssl_get_message(s,
3506 SSL3_ST_CR_SUPPLEMENTAL_DATA_A,
3507 SSL3_ST_CR_SUPPLEMENTAL_DATA_B,
3508 SSL3_MT_SUPPLEMENTAL_DATA,
3509 /* use default limit */
3510 TLSEXT_MAXLEN_supplemental_data,
3513 if (!ok) return((int)n);
3515 p = (unsigned char *)s->init_msg;
3517 /* The message cannot be empty */
3520 al = SSL_AD_DECODE_ERROR;
3521 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3524 /* Length of supplemental data */
3525 n2l3(p,supp_data_len);
3527 /* We must have at least one supplemental data entry
3528 * with type (1 byte) and length (2 bytes). */
3529 if (supp_data_len != (unsigned long) n || n < 4)
3531 al = SSL_AD_DECODE_ERROR;
3532 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3535 /* Supplemental data type: must be authz_data */
3536 n2s(p,supp_data_type);
3538 if (supp_data_type != TLSEXT_SUPPLEMENTALDATATYPE_authz_data)
3540 al = SSL_AD_UNEXPECTED_MESSAGE;
3541 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_UNKNOWN_SUPPLEMENTAL_DATA_TYPE);
3544 /* Authz data length */
3545 n2s(p, authz_data_len);
3547 if (authz_data_len != (unsigned long) n || n < 1)
3549 al = SSL_AD_DECODE_ERROR;
3550 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3553 /* Authz data type: must be audit_proof */
3554 authz_data_type = *(p++);
3556 if (authz_data_type != TLSEXT_AUTHZDATAFORMAT_audit_proof)
3558 al=SSL_AD_UNEXPECTED_MESSAGE;
3559 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_UNKNOWN_AUTHZ_DATA_TYPE);
3562 /* We have a proof: read its length */
3565 al = SSL_AD_DECODE_ERROR;
3566 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3571 if (proof_len != (unsigned long) n)
3573 al = SSL_AD_DECODE_ERROR;
3574 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3577 /* Store the proof */
3578 new_proof = OPENSSL_realloc(s->session->audit_proof,
3580 if (new_proof == NULL)
3582 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,ERR_R_MALLOC_FAILURE);
3585 s->session->audit_proof_length = proof_len;
3586 s->session->audit_proof = new_proof;
3587 memcpy(s->session->audit_proof, p, proof_len);
3589 /* Got the proof, but can't verify it yet. */
3592 ssl3_send_alert(s,SSL3_AL_FATAL,al);