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 case SSL3_ST_CR_CERT_A:
322 case SSL3_ST_CR_CERT_B:
323 #ifndef OPENSSL_NO_TLSEXT
324 ret=ssl3_check_finished(s);
325 if (ret <= 0) goto end;
329 if (s->tlsext_ticket_expected)
330 s->state=SSL3_ST_CR_SESSION_TICKET_A;
332 s->state=SSL3_ST_CR_FINISHED_A;
337 /* Check if it is anon DH/ECDH, SRP auth */
339 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) &&
340 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
342 ret=ssl3_get_server_certificate(s);
343 if (ret <= 0) goto end;
344 #ifndef OPENSSL_NO_TLSEXT
345 if (s->tlsext_status_expected)
346 s->state=SSL3_ST_CR_CERT_STATUS_A;
348 s->state=SSL3_ST_CR_KEY_EXCH_A;
353 s->state=SSL3_ST_CR_KEY_EXCH_A;
360 s->state=SSL3_ST_CR_KEY_EXCH_A;
365 case SSL3_ST_CR_KEY_EXCH_A:
366 case SSL3_ST_CR_KEY_EXCH_B:
367 ret=ssl3_get_key_exchange(s);
368 if (ret <= 0) goto end;
369 s->state=SSL3_ST_CR_CERT_REQ_A;
372 /* at this point we check that we have the
373 * required stuff from the server */
374 if (!ssl3_check_cert_and_algorithm(s))
381 case SSL3_ST_CR_CERT_REQ_A:
382 case SSL3_ST_CR_CERT_REQ_B:
383 ret=ssl3_get_certificate_request(s);
384 if (ret <= 0) goto end;
385 s->state=SSL3_ST_CR_SRVR_DONE_A;
389 case SSL3_ST_CR_SRVR_DONE_A:
390 case SSL3_ST_CR_SRVR_DONE_B:
391 ret=ssl3_get_server_done(s);
392 if (ret <= 0) goto end;
393 #ifndef OPENSSL_NO_SRP
394 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
396 if ((ret = SRP_Calc_A_param(s))<=0)
398 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
399 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
404 if (s->s3->tmp.cert_req)
405 s->state=SSL3_ST_CW_CERT_A;
407 s->state=SSL3_ST_CW_KEY_EXCH_A;
412 case SSL3_ST_CW_CERT_A:
413 case SSL3_ST_CW_CERT_B:
414 case SSL3_ST_CW_CERT_C:
415 case SSL3_ST_CW_CERT_D:
416 ret=ssl3_send_client_certificate(s);
417 if (ret <= 0) goto end;
418 s->state=SSL3_ST_CW_KEY_EXCH_A;
422 case SSL3_ST_CW_KEY_EXCH_A:
423 case SSL3_ST_CW_KEY_EXCH_B:
424 ret=ssl3_send_client_key_exchange(s);
425 if (ret <= 0) goto end;
426 /* EAY EAY EAY need to check for DH fix cert
428 /* For TLS, cert_req is set to 2, so a cert chain
429 * of nothing is sent, but no verify packet is sent */
430 /* XXX: For now, we do not support client
431 * authentication in ECDH cipher suites with
432 * ECDH (rather than ECDSA) certificates.
433 * We need to skip the certificate verify
434 * message when client's ECDH public key is sent
435 * inside the client certificate.
437 if (s->s3->tmp.cert_req == 1)
439 s->state=SSL3_ST_CW_CERT_VRFY_A;
443 s->state=SSL3_ST_CW_CHANGE_A;
444 s->s3->change_cipher_spec=0;
446 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
448 s->state=SSL3_ST_CW_CHANGE_A;
449 s->s3->change_cipher_spec=0;
455 case SSL3_ST_CW_CERT_VRFY_A:
456 case SSL3_ST_CW_CERT_VRFY_B:
457 ret=ssl3_send_client_verify(s);
458 if (ret <= 0) goto end;
459 s->state=SSL3_ST_CW_CHANGE_A;
461 s->s3->change_cipher_spec=0;
464 case SSL3_ST_CW_CHANGE_A:
465 case SSL3_ST_CW_CHANGE_B:
466 ret=ssl3_send_change_cipher_spec(s,
467 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
468 if (ret <= 0) goto end;
470 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
471 s->state=SSL3_ST_CW_FINISHED_A;
473 if (s->s3->next_proto_neg_seen)
474 s->state=SSL3_ST_CW_NEXT_PROTO_A;
476 s->state=SSL3_ST_CW_FINISHED_A;
480 s->session->cipher=s->s3->tmp.new_cipher;
481 #ifdef OPENSSL_NO_COMP
482 s->session->compress_meth=0;
484 if (s->s3->tmp.new_compression == NULL)
485 s->session->compress_meth=0;
487 s->session->compress_meth=
488 s->s3->tmp.new_compression->id;
490 if (!s->method->ssl3_enc->setup_key_block(s))
496 if (!s->method->ssl3_enc->change_cipher_state(s,
497 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
505 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
506 case SSL3_ST_CW_NEXT_PROTO_A:
507 case SSL3_ST_CW_NEXT_PROTO_B:
508 ret=ssl3_send_next_proto(s);
509 if (ret <= 0) goto end;
510 s->state=SSL3_ST_CW_FINISHED_A;
514 case SSL3_ST_CW_FINISHED_A:
515 case SSL3_ST_CW_FINISHED_B:
516 ret=ssl3_send_finished(s,
517 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
518 s->method->ssl3_enc->client_finished_label,
519 s->method->ssl3_enc->client_finished_label_len);
520 if (ret <= 0) goto end;
521 s->s3->flags |= SSL3_FLAGS_CCS_OK;
522 s->state=SSL3_ST_CW_FLUSH;
525 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
528 s->s3->tmp.next_state=SSL_ST_OK;
529 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
532 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
533 s->s3->delay_buf_pop_ret=0;
538 #ifndef OPENSSL_NO_TLSEXT
539 /* Allow NewSessionTicket if ticket expected */
540 if (s->tlsext_ticket_expected)
541 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
545 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
550 #ifndef OPENSSL_NO_TLSEXT
551 case SSL3_ST_CR_SESSION_TICKET_A:
552 case SSL3_ST_CR_SESSION_TICKET_B:
553 ret=ssl3_get_new_session_ticket(s);
554 if (ret <= 0) goto end;
555 s->state=SSL3_ST_CR_FINISHED_A;
559 case SSL3_ST_CR_CERT_STATUS_A:
560 case SSL3_ST_CR_CERT_STATUS_B:
561 ret=ssl3_get_cert_status(s);
562 if (ret <= 0) goto end;
563 s->state=SSL3_ST_CR_KEY_EXCH_A;
568 case SSL3_ST_CR_FINISHED_A:
569 case SSL3_ST_CR_FINISHED_B:
571 s->s3->flags |= SSL3_FLAGS_CCS_OK;
572 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
573 SSL3_ST_CR_FINISHED_B);
574 if (ret <= 0) goto end;
577 s->state=SSL3_ST_CW_CHANGE_A;
583 case SSL3_ST_CW_FLUSH:
584 s->rwstate=SSL_WRITING;
585 if (BIO_flush(s->wbio) <= 0)
590 s->rwstate=SSL_NOTHING;
591 s->state=s->s3->tmp.next_state;
595 /* clean a few things up */
596 ssl3_cleanup_key_block(s);
598 if (s->init_buf != NULL)
600 BUF_MEM_free(s->init_buf);
604 /* If we are not 'joining' the last two packets,
605 * remove the buffering now */
606 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
607 ssl_free_wbio_buffer(s);
608 /* else do it later in ssl3_write */
614 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
615 if (s->hit) s->ctx->stats.sess_hit++;
619 s->handshake_func=ssl3_connect;
620 s->ctx->stats.sess_connect_good++;
622 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
628 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
634 /* did we do anything */
635 if (!s->s3->tmp.reuse_message && !skip)
639 if ((ret=BIO_flush(s->wbio)) <= 0)
643 if ((cb != NULL) && (s->state != state))
647 cb(s,SSL_CB_CONNECT_LOOP,1);
658 cb(s,SSL_CB_CONNECT_EXIT,ret);
663 int ssl3_client_hello(SSL *s)
670 #ifndef OPENSSL_NO_COMP
675 buf=(unsigned char *)s->init_buf->data;
676 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
678 SSL_SESSION *sess = s->session;
679 if ((sess == NULL) ||
680 (sess->ssl_version != s->version) ||
681 #ifdef OPENSSL_NO_TLSEXT
682 !sess->session_id_length ||
684 (!sess->session_id_length && !sess->tlsext_tick) ||
686 (sess->not_resumable))
688 if (!ssl_get_new_session(s,0))
691 if (s->method->version == DTLS_ANY_VERSION)
693 /* Determine which DTLS version to use */
694 int options = s->options;
695 /* If DTLS 1.2 disabled correct the version number */
696 if (options & SSL_OP_NO_DTLSv1_2)
700 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
703 /* Disabling all versions is silly: return an
706 if (options & SSL_OP_NO_DTLSv1)
708 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
711 /* Update method so we don't use any DTLS 1.2
714 s->method = DTLSv1_client_method();
715 s->version = DTLS1_VERSION;
719 /* We only support one version: update method */
720 if (options & SSL_OP_NO_DTLSv1)
721 s->method = DTLSv1_2_client_method();
722 s->version = DTLS1_2_VERSION;
724 s->client_version = s->version;
726 /* else use the pre-loaded session */
728 p=s->s3->client_random;
730 /* for DTLS if client_random is initialized, reuse it, we are
731 * required to use same upon reply to HelloVerify */
736 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
749 ssl_fill_hello_random(s, 0, p,
750 sizeof(s->s3->client_random));
752 /* Do the message type and length last */
753 d=p= ssl_handshake_start(s);
755 /* version indicates the negotiated version: for example from
756 * an SSLv2/v3 compatible client hello). The client_version
757 * field is the maximum version we permit and it is also
758 * used in RSA encrypted premaster secrets. Some servers can
759 * choke if we initially report a higher version then
760 * renegotiate to a lower one in the premaster secret. This
761 * didn't happen with TLS 1.0 as most servers supported it
762 * but it can with TLS 1.1 or later if the server only supports
765 * Possible scenario with previous logic:
766 * 1. Client hello indicates TLS 1.2
767 * 2. Server hello says TLS 1.0
768 * 3. RSA encrypted premaster secret uses 1.2.
769 * 4. Handhaked proceeds using TLS 1.0.
770 * 5. Server sends hello request to renegotiate.
771 * 6. Client hello indicates TLS v1.0 as we now
772 * know that is maximum server supports.
773 * 7. Server chokes on RSA encrypted premaster secret
774 * containing version 1.0.
776 * For interoperability it should be OK to always use the
777 * maximum version we support in client hello and then rely
778 * on the checking of version to ensure the servers isn't
779 * being inconsistent: for example initially negotiating with
780 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
781 * client_version in client hello and not resetting it to
782 * the negotiated version.
785 *(p++)=s->version>>8;
786 *(p++)=s->version&0xff;
787 s->client_version=s->version;
789 *(p++)=s->client_version>>8;
790 *(p++)=s->client_version&0xff;
794 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
801 i=s->session->session_id_length;
805 if (i > (int)sizeof(s->session->session_id))
807 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
810 memcpy(p,s->session->session_id,i);
814 /* cookie stuff for DTLS */
817 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
819 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
822 *(p++) = s->d1->cookie_len;
823 memcpy(p, s->d1->cookie, s->d1->cookie_len);
824 p += s->d1->cookie_len;
827 /* Ciphers supported */
828 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
831 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
834 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
835 /* Some servers hang if client hello > 256 bytes
836 * as hack workaround chop number of supported ciphers
837 * to keep it well below this if we use TLS v1.2
839 if (TLS1_get_version(s) >= TLS1_2_VERSION
840 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
841 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
847 #ifdef OPENSSL_NO_COMP
851 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
854 j=sk_SSL_COMP_num(s->ctx->comp_methods);
858 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
862 *(p++)=0; /* Add the NULL method */
864 #ifndef OPENSSL_NO_TLSEXT
866 if (ssl_prepare_clienthello_tlsext(s) <= 0)
868 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
871 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
873 ssl3_send_alert(s,SSL3_AL_FATAL,al);
874 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
880 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
881 s->state=SSL3_ST_CW_CLNT_HELLO_B;
884 /* SSL3_ST_CW_CLNT_HELLO_B */
885 return ssl_do_write(s);
890 int ssl3_get_server_hello(SSL *s)
892 STACK_OF(SSL_CIPHER) *sk;
896 int i,al=SSL_AD_INTERNAL_ERROR,ok;
899 #ifndef OPENSSL_NO_COMP
902 /* Hello verify request and/or server hello version may not
903 * match so set first packet if we're negotiating version.
908 n=s->method->ssl_get_message(s,
909 SSL3_ST_CR_SRVR_HELLO_A,
910 SSL3_ST_CR_SRVR_HELLO_B,
915 if (!ok) return((int)n);
920 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
922 if ( s->d1->send_cookie == 0)
924 s->s3->tmp.reuse_message = 1;
927 else /* already sent a cookie */
929 al=SSL_AD_UNEXPECTED_MESSAGE;
930 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
936 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
938 al=SSL_AD_UNEXPECTED_MESSAGE;
939 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
943 d=p=(unsigned char *)s->init_msg;
944 if (s->method->version == DTLS_ANY_VERSION)
946 /* Work out correct protocol version to use */
947 int hversion = (p[0] << 8)|p[1];
948 int options = s->options;
949 if (hversion == DTLS1_2_VERSION
950 && !(options & SSL_OP_NO_DTLSv1_2))
951 s->method = DTLSv1_2_client_method();
952 else if (tls1_suiteb(s))
954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
955 s->version = hversion;
956 al = SSL_AD_PROTOCOL_VERSION;
959 else if (hversion == DTLS1_VERSION
960 && !(options & SSL_OP_NO_DTLSv1))
961 s->method = DTLSv1_client_method();
964 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
965 s->version = hversion;
966 al = SSL_AD_PROTOCOL_VERSION;
969 s->version = s->client_version = s->method->version;
972 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
974 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
975 s->version=(s->version&0xff00)|p[1];
976 al=SSL_AD_PROTOCOL_VERSION;
981 /* load the server hello data */
982 /* load the server random */
983 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
986 /* get the session-id */
989 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
991 al=SSL_AD_ILLEGAL_PARAMETER;
992 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
996 #ifndef OPENSSL_NO_TLSEXT
997 /* check if we want to resume the session based on external pre-shared secret */
998 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1000 SSL_CIPHER *pref_cipher=NULL;
1001 s->session->master_key_length=sizeof(s->session->master_key);
1002 if (s->tls_session_secret_cb(s, s->session->master_key,
1003 &s->session->master_key_length,
1005 s->tls_session_secret_cb_arg))
1007 s->session->cipher = pref_cipher ?
1008 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1009 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1012 #endif /* OPENSSL_NO_TLSEXT */
1014 if (j != 0 && j == s->session->session_id_length
1015 && memcmp(p,s->session->session_id,j) == 0)
1017 if(s->sid_ctx_length != s->session->sid_ctx_length
1018 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1020 /* actually a client application bug */
1021 al=SSL_AD_ILLEGAL_PARAMETER;
1022 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1025 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1028 else /* a miss or crap from the other end */
1030 /* If we were trying for session-id reuse, make a new
1031 * SSL_SESSION so we don't stuff up other people */
1033 if (s->session->session_id_length > 0)
1035 if (!ssl_get_new_session(s,0))
1040 s->session->session_id_length=j;
1041 memcpy(s->session->session_id,p,j); /* j could be 0 */
1044 c=ssl_get_cipher_by_char(s,p);
1047 /* unknown cipher */
1048 al=SSL_AD_ILLEGAL_PARAMETER;
1049 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1052 /* Set version disabled mask now we know version */
1053 if (!SSL_USE_TLS1_2_CIPHERS(s))
1054 ct->mask_ssl = SSL_TLSV1_2;
1057 /* If it is a disabled cipher we didn't send it in client hello,
1058 * so return an error.
1060 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK))
1062 al=SSL_AD_ILLEGAL_PARAMETER;
1063 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1066 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1068 sk=ssl_get_ciphers_by_id(s);
1069 i=sk_SSL_CIPHER_find(sk,c);
1072 /* we did not say we would use this cipher */
1073 al=SSL_AD_ILLEGAL_PARAMETER;
1074 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1078 /* Depending on the session caching (internal/external), the cipher
1079 and/or cipher_id values may not be set. Make sure that
1080 cipher_id is set and use it for comparison. */
1081 if (s->session->cipher)
1082 s->session->cipher_id = s->session->cipher->id;
1083 if (s->hit && (s->session->cipher_id != c->id))
1085 /* Workaround is now obsolete */
1088 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1091 al=SSL_AD_ILLEGAL_PARAMETER;
1092 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1096 s->s3->tmp.new_cipher=c;
1097 /* Don't digest cached records if no sigalgs: we may need them for
1098 * client authentication.
1100 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1102 /* lets get the compression algorithm */
1104 #ifdef OPENSSL_NO_COMP
1107 al=SSL_AD_ILLEGAL_PARAMETER;
1108 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1111 /* If compression is disabled we'd better not try to resume a session
1112 * using compression.
1114 if (s->session->compress_meth != 0)
1116 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1121 if (s->hit && j != s->session->compress_meth)
1123 al=SSL_AD_ILLEGAL_PARAMETER;
1124 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1129 else if (!ssl_allow_compression(s))
1131 al=SSL_AD_ILLEGAL_PARAMETER;
1132 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1136 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1138 if ((j != 0) && (comp == NULL))
1140 al=SSL_AD_ILLEGAL_PARAMETER;
1141 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1146 s->s3->tmp.new_compression=comp;
1150 #ifndef OPENSSL_NO_TLSEXT
1152 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1154 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1161 /* wrong packet length */
1162 al=SSL_AD_DECODE_ERROR;
1163 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1169 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1174 int ssl3_get_server_certificate(SSL *s)
1176 int al,i,ok,ret= -1;
1177 unsigned long n,nc,llen,l;
1179 const unsigned char *q,*p;
1181 STACK_OF(X509) *sk=NULL;
1183 EVP_PKEY *pkey=NULL;
1184 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1186 n=s->method->ssl_get_message(s,
1193 if (!ok) return((int)n);
1195 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1196 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1197 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1199 s->s3->tmp.reuse_message=1;
1203 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1205 al=SSL_AD_UNEXPECTED_MESSAGE;
1206 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1209 p=d=(unsigned char *)s->init_msg;
1211 if ((sk=sk_X509_new_null()) == NULL)
1213 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1220 al=SSL_AD_DECODE_ERROR;
1221 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1224 for (nc=0; nc<llen; )
1227 if ((l+nc+3) > llen)
1229 al=SSL_AD_DECODE_ERROR;
1230 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1235 x=d2i_X509(NULL,&q,l);
1238 al=SSL_AD_BAD_CERTIFICATE;
1239 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1244 al=SSL_AD_DECODE_ERROR;
1245 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1248 if (!sk_X509_push(sk,x))
1250 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1258 i=ssl_verify_cert_chain(s,sk);
1259 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1260 #ifndef OPENSSL_NO_KRB5
1261 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1262 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1263 #endif /* OPENSSL_NO_KRB5 */
1266 al=ssl_verify_alarm_type(s->verify_result);
1267 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1270 ERR_clear_error(); /* but we keep s->verify_result */
1273 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1274 al = SSL_AD_HANDSHAKE_FAILURE;
1278 sc=ssl_sess_cert_new();
1279 if (sc == NULL) goto err;
1281 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1282 s->session->sess_cert=sc;
1285 /* Inconsistency alert: cert_chain does include the peer's
1286 * certificate, which we don't include in s3_srvr.c */
1287 x=sk_X509_value(sk,0);
1289 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1291 pkey=X509_get_pubkey(x);
1293 /* VRS: allow null cert if auth == KRB5 */
1294 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1295 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1299 printf("pkey,x = %p, %p\n", pkey,x);
1300 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1301 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1302 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1303 #endif /* KSSL_DEBUG */
1305 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1309 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1310 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1314 i=ssl_cert_type(x,pkey);
1315 if (need_cert && i < 0)
1319 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1320 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1326 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1327 if (exp_idx >= 0 && i != exp_idx)
1330 al=SSL_AD_ILLEGAL_PARAMETER;
1331 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1332 SSL_R_WRONG_CERTIFICATE_TYPE);
1335 sc->peer_cert_type=i;
1336 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1337 /* Why would the following ever happen?
1338 * We just created sc a couple of lines ago. */
1339 if (sc->peer_pkeys[i].x509 != NULL)
1340 X509_free(sc->peer_pkeys[i].x509);
1341 sc->peer_pkeys[i].x509=x;
1342 sc->peer_key= &(sc->peer_pkeys[i]);
1344 if (s->session->peer != NULL)
1345 X509_free(s->session->peer);
1346 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1351 sc->peer_cert_type=i;
1354 if (s->session->peer != NULL)
1355 X509_free(s->session->peer);
1356 s->session->peer=NULL;
1358 s->session->verify_result = s->verify_result;
1365 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1368 EVP_PKEY_free(pkey);
1370 sk_X509_pop_free(sk,X509_free);
1374 int ssl3_get_key_exchange(SSL *s)
1376 #ifndef OPENSSL_NO_RSA
1377 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1380 unsigned char *param,*p;
1382 long i,param_len,n,alg_k,alg_a;
1383 EVP_PKEY *pkey=NULL;
1384 const EVP_MD *md = NULL;
1385 #ifndef OPENSSL_NO_RSA
1388 #ifndef OPENSSL_NO_DH
1391 #ifndef OPENSSL_NO_ECDH
1392 EC_KEY *ecdh = NULL;
1393 BN_CTX *bn_ctx = NULL;
1394 EC_POINT *srvr_ecpoint = NULL;
1396 int encoded_pt_len = 0;
1399 /* use same message size as in ssl3_get_certificate_request()
1400 * as ServerKeyExchange message may be skipped */
1401 n=s->method->ssl_get_message(s,
1402 SSL3_ST_CR_KEY_EXCH_A,
1403 SSL3_ST_CR_KEY_EXCH_B,
1407 if (!ok) return((int)n);
1409 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1411 #ifndef OPENSSL_NO_PSK
1412 /* In plain PSK ciphersuite, ServerKeyExchange can be
1413 omitted if no identity hint is sent. Set
1414 session->sess_cert anyway to avoid problems
1416 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1418 s->session->sess_cert=ssl_sess_cert_new();
1419 if (s->ctx->psk_identity_hint)
1420 OPENSSL_free(s->ctx->psk_identity_hint);
1421 s->ctx->psk_identity_hint = NULL;
1424 s->s3->tmp.reuse_message=1;
1428 param=p=(unsigned char *)s->init_msg;
1429 if (s->session->sess_cert != NULL)
1431 #ifndef OPENSSL_NO_RSA
1432 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1434 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1435 s->session->sess_cert->peer_rsa_tmp=NULL;
1438 #ifndef OPENSSL_NO_DH
1439 if (s->session->sess_cert->peer_dh_tmp)
1441 DH_free(s->session->sess_cert->peer_dh_tmp);
1442 s->session->sess_cert->peer_dh_tmp=NULL;
1445 #ifndef OPENSSL_NO_ECDH
1446 if (s->session->sess_cert->peer_ecdh_tmp)
1448 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1449 s->session->sess_cert->peer_ecdh_tmp=NULL;
1455 s->session->sess_cert=ssl_sess_cert_new();
1458 /* Total length of the parameters including the length prefix */
1461 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1462 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1463 EVP_MD_CTX_init(&md_ctx);
1465 al=SSL_AD_DECODE_ERROR;
1467 #ifndef OPENSSL_NO_PSK
1468 if (alg_k & SSL_kPSK)
1470 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1475 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1476 SSL_R_LENGTH_TOO_SHORT);
1481 /* Store PSK identity hint for later use, hint is used
1482 * in ssl3_send_client_key_exchange. Assume that the
1483 * maximum length of a PSK identity hint can be as
1484 * long as the maximum length of a PSK identity. */
1485 if (i > PSK_MAX_IDENTITY_LEN)
1487 al=SSL_AD_HANDSHAKE_FAILURE;
1488 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1489 SSL_R_DATA_LENGTH_TOO_LONG);
1492 if (i > n - param_len)
1494 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1495 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1500 /* If received PSK identity hint contains NULL
1501 * characters, the hint is truncated from the first
1502 * NULL. p may not be ending with NULL, so create a
1503 * NULL-terminated string. */
1504 memcpy(tmp_id_hint, p, i);
1505 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1506 if (s->ctx->psk_identity_hint != NULL)
1507 OPENSSL_free(s->ctx->psk_identity_hint);
1508 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1509 if (s->ctx->psk_identity_hint == NULL)
1511 al=SSL_AD_HANDSHAKE_FAILURE;
1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1520 #endif /* !OPENSSL_NO_PSK */
1521 #ifndef OPENSSL_NO_SRP
1522 if (alg_k & SSL_kSRP)
1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1528 SSL_R_LENGTH_TOO_SHORT);
1533 if (i > n - param_len)
1535 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1540 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1542 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1548 if (2 > n - param_len)
1550 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1551 SSL_R_LENGTH_TOO_SHORT);
1558 if (i > n - param_len)
1560 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1565 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1573 if (1 > n - param_len)
1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1576 SSL_R_LENGTH_TOO_SHORT);
1581 i = (unsigned int)(p[0]);
1584 if (i > n - param_len)
1586 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1591 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1593 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1598 if (2 > n - param_len)
1600 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1601 SSL_R_LENGTH_TOO_SHORT);
1608 if (i > n - param_len)
1610 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1615 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1617 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1623 if (!srp_verify_server_param(s, &al))
1625 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1629 /* We must check if there is a certificate */
1630 #ifndef OPENSSL_NO_RSA
1631 if (alg_a & SSL_aRSA)
1632 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1637 #ifndef OPENSSL_NO_DSA
1638 else if (alg_a & SSL_aDSS)
1639 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1643 #endif /* !OPENSSL_NO_SRP */
1644 #ifndef OPENSSL_NO_RSA
1645 if (alg_k & SSL_kRSA)
1647 if ((rsa=RSA_new()) == NULL)
1649 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1656 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1657 SSL_R_LENGTH_TOO_SHORT);
1662 if (i > n - param_len)
1664 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1669 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1671 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1676 if (2 > n - param_len)
1678 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1679 SSL_R_LENGTH_TOO_SHORT);
1686 if (i > n - param_len)
1688 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1693 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1695 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1701 /* this should be because we are using an export cipher */
1702 if (alg_a & SSL_aRSA)
1703 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1706 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1709 s->session->sess_cert->peer_rsa_tmp=rsa;
1712 #else /* OPENSSL_NO_RSA */
1716 #ifndef OPENSSL_NO_DH
1717 else if (alg_k & SSL_kDHE)
1719 if ((dh=DH_new()) == NULL)
1721 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1728 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1729 SSL_R_LENGTH_TOO_SHORT);
1734 if (i > n - param_len)
1736 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1741 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1743 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1748 if (2 > n - param_len)
1750 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1751 SSL_R_LENGTH_TOO_SHORT);
1758 if (i > n - param_len)
1760 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1765 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1767 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1772 if (2 > n - param_len)
1774 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1775 SSL_R_LENGTH_TOO_SHORT);
1782 if (i > n - param_len)
1784 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1789 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1791 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1797 if (!ssl_security(s, SSL_SECOP_TMP_DH,
1798 DH_security_bits(dh), 0, dh))
1800 al=SSL_AD_HANDSHAKE_FAILURE;
1801 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL);
1805 #ifndef OPENSSL_NO_RSA
1806 if (alg_a & SSL_aRSA)
1807 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1812 #ifndef OPENSSL_NO_DSA
1813 else if (alg_a & SSL_aDSS)
1814 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1816 /* else anonymous DH, so no certificate or pkey. */
1818 s->session->sess_cert->peer_dh_tmp=dh;
1821 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1823 al=SSL_AD_ILLEGAL_PARAMETER;
1824 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1827 #endif /* !OPENSSL_NO_DH */
1829 #ifndef OPENSSL_NO_ECDH
1830 else if (alg_k & SSL_kECDHE)
1833 const EC_GROUP *group;
1835 if ((ecdh=EC_KEY_new()) == NULL)
1837 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1841 /* Extract elliptic curve parameters and the
1842 * server's ephemeral ECDH public key.
1843 * Keep accumulating lengths of various components in
1844 * param_len and make sure it never exceeds n.
1847 /* XXX: For now we only support named (not generic) curves
1848 * and the ECParameters in this case is just three bytes. We
1849 * also need one byte for the length of the encoded point
1854 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1855 SSL_R_LENGTH_TOO_SHORT);
1858 /* Check curve is one of our preferences, if not server has
1859 * sent an invalid curve. ECParameters is 3 bytes.
1861 if (!tls1_check_curve(s, p, 3))
1863 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1867 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1869 al=SSL_AD_INTERNAL_ERROR;
1870 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1874 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1877 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1880 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1882 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1885 EC_GROUP_free(ngroup);
1887 group = EC_KEY_get0_group(ecdh);
1889 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1890 (EC_GROUP_get_degree(group) > 163))
1892 al=SSL_AD_EXPORT_RESTRICTION;
1893 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1899 /* Next, get the encoded ECPoint */
1900 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1901 ((bn_ctx = BN_CTX_new()) == NULL))
1903 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1907 encoded_pt_len = *p; /* length of encoded point */
1910 if ((encoded_pt_len > n - param_len) ||
1911 (EC_POINT_oct2point(group, srvr_ecpoint,
1912 p, encoded_pt_len, bn_ctx) == 0))
1914 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1917 param_len += encoded_pt_len;
1922 /* The ECC/TLS specification does not mention
1923 * the use of DSA to sign ECParameters in the server
1924 * key exchange message. We do support RSA and ECDSA.
1927 #ifndef OPENSSL_NO_RSA
1928 else if (alg_a & SSL_aRSA)
1929 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1931 #ifndef OPENSSL_NO_ECDSA
1932 else if (alg_a & SSL_aECDSA)
1933 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1935 /* else anonymous ECDH, so no certificate or pkey. */
1936 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1937 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1939 BN_CTX_free(bn_ctx);
1941 EC_POINT_free(srvr_ecpoint);
1942 srvr_ecpoint = NULL;
1946 al=SSL_AD_UNEXPECTED_MESSAGE;
1947 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1950 #endif /* !OPENSSL_NO_ECDH */
1953 /* p points to the next byte, there are 'n' bytes left */
1955 /* if it was signed, check the signature */
1958 if (SSL_USE_SIGALGS(s))
1963 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1964 SSL_R_LENGTH_TOO_SHORT);
1967 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1975 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1985 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1986 SSL_R_LENGTH_TOO_SHORT);
1991 j=EVP_PKEY_size(pkey);
1993 /* Check signature length. If n is 0 then signature is empty */
1994 if ((i != n) || (n > j) || (n <= 0))
1996 /* wrong packet length */
1997 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
2001 #ifndef OPENSSL_NO_RSA
2002 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
2009 for (num=2; num > 0; num--)
2011 EVP_MD_CTX_set_flags(&md_ctx,
2012 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
2013 EVP_DigestInit_ex(&md_ctx,(num == 2)
2014 ?s->ctx->md5:s->ctx->sha1, NULL);
2015 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2016 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2017 EVP_DigestUpdate(&md_ctx,param,param_len);
2018 EVP_DigestFinal_ex(&md_ctx,q,&size);
2022 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
2026 al=SSL_AD_DECRYPT_ERROR;
2027 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
2033 al=SSL_AD_DECRYPT_ERROR;
2034 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2041 EVP_VerifyInit_ex(&md_ctx, md, NULL);
2042 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2043 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2044 EVP_VerifyUpdate(&md_ctx,param,param_len);
2045 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
2048 al=SSL_AD_DECRYPT_ERROR;
2049 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2056 /* aNULL, aSRP or kPSK do not need public keys */
2057 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
2059 /* Might be wrong key type, check it */
2060 if (ssl3_check_cert_and_algorithm(s))
2061 /* Otherwise this shouldn't happen */
2062 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2065 /* still data left over */
2068 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
2072 EVP_PKEY_free(pkey);
2073 EVP_MD_CTX_cleanup(&md_ctx);
2076 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2078 EVP_PKEY_free(pkey);
2079 #ifndef OPENSSL_NO_RSA
2083 #ifndef OPENSSL_NO_DH
2087 #ifndef OPENSSL_NO_ECDH
2088 BN_CTX_free(bn_ctx);
2089 EC_POINT_free(srvr_ecpoint);
2093 EVP_MD_CTX_cleanup(&md_ctx);
2097 int ssl3_get_certificate_request(SSL *s)
2100 unsigned long n,nc,l;
2101 unsigned int llen, ctype_num,i;
2103 const unsigned char *p,*q;
2105 STACK_OF(X509_NAME) *ca_sk=NULL;
2107 n=s->method->ssl_get_message(s,
2108 SSL3_ST_CR_CERT_REQ_A,
2109 SSL3_ST_CR_CERT_REQ_B,
2114 if (!ok) return((int)n);
2116 s->s3->tmp.cert_req=0;
2118 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2120 s->s3->tmp.reuse_message=1;
2121 /* If we get here we don't need any cached handshake records
2122 * as we wont be doing client auth.
2124 if (s->s3->handshake_buffer)
2126 if (!ssl3_digest_cached_records(s))
2132 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2134 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2135 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2139 /* TLS does not like anon-DH with client cert */
2140 if (s->version > SSL3_VERSION)
2142 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2144 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2145 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2150 p=d=(unsigned char *)s->init_msg;
2152 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2154 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2158 /* get the certificate types */
2160 if (s->cert->ctypes)
2162 OPENSSL_free(s->cert->ctypes);
2163 s->cert->ctypes = NULL;
2165 if (ctype_num > SSL3_CT_NUMBER)
2167 /* If we exceed static buffer copy all to cert structure */
2168 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2169 memcpy(s->cert->ctypes, p, ctype_num);
2170 s->cert->ctype_num = (size_t)ctype_num;
2171 ctype_num=SSL3_CT_NUMBER;
2173 for (i=0; i<ctype_num; i++)
2174 s->s3->tmp.ctype[i]= p[i];
2176 if (SSL_USE_SIGALGS(s))
2179 /* Check we have enough room for signature algorithms and
2180 * following length value.
2182 if ((unsigned long)(p - d + llen + 2) > n)
2184 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2185 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2188 /* Clear certificate digests and validity flags */
2189 for (i = 0; i < SSL_PKEY_NUM; i++)
2191 s->cert->pkeys[i].digest = NULL;
2192 s->cert->pkeys[i].valid_flags = 0;
2194 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2196 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2197 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2203 /* get the CA RDNs */
2208 out=fopen("/tmp/vsign.der","w");
2209 fwrite(p,1,llen,out);
2214 if ((unsigned long)(p - d + llen) != n)
2216 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2217 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2221 for (nc=0; nc<llen; )
2224 if ((l+nc+2) > llen)
2226 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2227 goto cont; /* netscape bugs */
2228 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2229 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2235 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2237 /* If netscape tolerance is on, ignore errors */
2238 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2242 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2243 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2250 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2251 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2254 if (!sk_X509_NAME_push(ca_sk,xn))
2256 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2270 /* we should setup a certificate to return.... */
2271 s->s3->tmp.cert_req=1;
2272 s->s3->tmp.ctype_num=ctype_num;
2273 if (s->s3->tmp.ca_names != NULL)
2274 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2275 s->s3->tmp.ca_names=ca_sk;
2280 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2284 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2286 return(X509_NAME_cmp(*a,*b));
2288 #ifndef OPENSSL_NO_TLSEXT
2289 int ssl3_get_new_session_ticket(SSL *s)
2291 int ok,al,ret=0, ticklen;
2293 const unsigned char *p;
2296 n=s->method->ssl_get_message(s,
2297 SSL3_ST_CR_SESSION_TICKET_A,
2298 SSL3_ST_CR_SESSION_TICKET_B,
2306 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2308 s->s3->tmp.reuse_message=1;
2311 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2313 al=SSL_AD_UNEXPECTED_MESSAGE;
2314 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2319 /* need at least ticket_lifetime_hint + ticket length */
2320 al = SSL_AD_DECODE_ERROR;
2321 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2325 p=d=(unsigned char *)s->init_msg;
2326 n2l(p, s->session->tlsext_tick_lifetime_hint);
2328 /* ticket_lifetime_hint + ticket_length + ticket */
2329 if (ticklen + 6 != n)
2331 al = SSL_AD_DECODE_ERROR;
2332 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2335 if (s->session->tlsext_tick)
2337 OPENSSL_free(s->session->tlsext_tick);
2338 s->session->tlsext_ticklen = 0;
2340 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2341 if (!s->session->tlsext_tick)
2343 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2346 memcpy(s->session->tlsext_tick, p, ticklen);
2347 s->session->tlsext_ticklen = ticklen;
2348 /* There are two ways to detect a resumed ticket sesion.
2349 * One is to set an appropriate session ID and then the server
2350 * must return a match in ServerHello. This allows the normal
2351 * client session ID matching to work and we know much
2352 * earlier that the ticket has been accepted.
2354 * The other way is to set zero length session ID when the
2355 * ticket is presented and rely on the handshake to determine
2356 * session resumption.
2358 * We choose the former approach because this fits in with
2359 * assumptions elsewhere in OpenSSL. The session ID is set
2360 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2363 EVP_Digest(p, ticklen,
2364 s->session->session_id, &s->session->session_id_length,
2365 #ifndef OPENSSL_NO_SHA256
2366 EVP_sha256(), NULL);
2373 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2378 int ssl3_get_cert_status(SSL *s)
2381 unsigned long resplen,n;
2382 const unsigned char *p;
2384 n=s->method->ssl_get_message(s,
2385 SSL3_ST_CR_CERT_STATUS_A,
2386 SSL3_ST_CR_CERT_STATUS_B,
2387 SSL3_MT_CERTIFICATE_STATUS,
2391 if (!ok) return((int)n);
2394 /* need at least status type + length */
2395 al = SSL_AD_DECODE_ERROR;
2396 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2399 p = (unsigned char *)s->init_msg;
2400 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2402 al = SSL_AD_DECODE_ERROR;
2403 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2407 if (resplen + 4 != n)
2409 al = SSL_AD_DECODE_ERROR;
2410 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2413 if (s->tlsext_ocsp_resp)
2414 OPENSSL_free(s->tlsext_ocsp_resp);
2415 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2416 if (!s->tlsext_ocsp_resp)
2418 al = SSL_AD_INTERNAL_ERROR;
2419 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2422 s->tlsext_ocsp_resplen = resplen;
2423 if (s->ctx->tlsext_status_cb)
2426 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2429 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2430 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2435 al = SSL_AD_INTERNAL_ERROR;
2436 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2442 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2447 int ssl3_get_server_done(SSL *s)
2452 n=s->method->ssl_get_message(s,
2453 SSL3_ST_CR_SRVR_DONE_A,
2454 SSL3_ST_CR_SRVR_DONE_B,
2455 SSL3_MT_SERVER_DONE,
2456 30, /* should be very small, like 0 :-) */
2459 if (!ok) return((int)n);
2462 /* should contain no data */
2463 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2464 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2472 int ssl3_send_client_key_exchange(SSL *s)
2476 unsigned long alg_k;
2477 #ifndef OPENSSL_NO_RSA
2479 EVP_PKEY *pkey=NULL;
2481 #ifndef OPENSSL_NO_KRB5
2483 #endif /* OPENSSL_NO_KRB5 */
2484 #ifndef OPENSSL_NO_ECDH
2485 EC_KEY *clnt_ecdh = NULL;
2486 const EC_POINT *srvr_ecpoint = NULL;
2487 EVP_PKEY *srvr_pub_pkey = NULL;
2488 unsigned char *encodedPoint = NULL;
2489 int encoded_pt_len = 0;
2490 BN_CTX * bn_ctx = NULL;
2493 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2495 p = ssl_handshake_start(s);
2497 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2499 /* Fool emacs indentation */
2501 #ifndef OPENSSL_NO_RSA
2502 else if (alg_k & SSL_kRSA)
2505 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2507 if (s->session->sess_cert == NULL)
2509 /* We should always have a server certificate with SSL_kRSA. */
2510 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2514 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2515 rsa=s->session->sess_cert->peer_rsa_tmp;
2518 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2519 if ((pkey == NULL) ||
2520 (pkey->type != EVP_PKEY_RSA) ||
2521 (pkey->pkey.rsa == NULL))
2523 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2527 EVP_PKEY_free(pkey);
2530 tmp_buf[0]=s->client_version>>8;
2531 tmp_buf[1]=s->client_version&0xff;
2532 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2535 s->session->master_key_length=sizeof tmp_buf;
2538 /* Fix buf for TLS and beyond */
2539 if (s->version > SSL3_VERSION)
2541 n=RSA_public_encrypt(sizeof tmp_buf,
2542 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2544 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2545 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2549 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2553 /* Fix buf for TLS and beyond */
2554 if (s->version > SSL3_VERSION)
2560 s->session->master_key_length=
2561 s->method->ssl3_enc->generate_master_secret(s,
2562 s->session->master_key,
2563 tmp_buf,sizeof tmp_buf);
2564 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2567 #ifndef OPENSSL_NO_KRB5
2568 else if (alg_k & SSL_kKRB5)
2570 krb5_error_code krb5rc;
2571 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2572 /* krb5_data krb5_ap_req; */
2573 krb5_data *enc_ticket;
2574 krb5_data authenticator, *authp = NULL;
2575 EVP_CIPHER_CTX ciph_ctx;
2576 const EVP_CIPHER *enc = NULL;
2577 unsigned char iv[EVP_MAX_IV_LENGTH];
2578 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2579 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2580 + EVP_MAX_IV_LENGTH];
2581 int padl, outl = sizeof(epms);
2583 EVP_CIPHER_CTX_init(&ciph_ctx);
2586 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2588 #endif /* KSSL_DEBUG */
2592 if (KRB5SENDAUTH) authp = &authenticator;
2593 #endif /* KRB5SENDAUTH */
2595 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2597 enc = kssl_map_enc(kssl_ctx->enctype);
2602 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2603 if (krb5rc && kssl_err.text)
2604 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2606 #endif /* KSSL_DEBUG */
2610 ssl3_send_alert(s,SSL3_AL_FATAL,
2611 SSL_AD_HANDSHAKE_FAILURE);
2612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2617 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2618 ** in place of RFC 2712 KerberosWrapper, as in:
2620 ** Send ticket (copy to *p, set n = length)
2621 ** n = krb5_ap_req.length;
2622 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2623 ** if (krb5_ap_req.data)
2624 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2626 ** Now using real RFC 2712 KerberosWrapper
2627 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2628 ** Note: 2712 "opaque" types are here replaced
2629 ** with a 2-byte length followed by the value.
2631 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2632 ** Where "xx xx" = length bytes. Shown here with
2633 ** optional authenticator omitted.
2636 /* KerberosWrapper.Ticket */
2637 s2n(enc_ticket->length,p);
2638 memcpy(p, enc_ticket->data, enc_ticket->length);
2639 p+= enc_ticket->length;
2640 n = enc_ticket->length + 2;
2642 /* KerberosWrapper.Authenticator */
2643 if (authp && authp->length)
2645 s2n(authp->length,p);
2646 memcpy(p, authp->data, authp->length);
2648 n+= authp->length + 2;
2656 s2n(0,p);/* null authenticator length */
2660 tmp_buf[0]=s->client_version>>8;
2661 tmp_buf[1]=s->client_version&0xff;
2662 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2665 /* 20010420 VRS. Tried it this way; failed.
2666 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2667 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2668 ** kssl_ctx->length);
2669 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2672 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2673 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2675 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2677 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2679 if (outl > (int)sizeof epms)
2681 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2684 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2686 /* KerberosWrapper.EncryptedPreMasterSecret */
2688 memcpy(p, epms, outl);
2692 s->session->master_key_length=
2693 s->method->ssl3_enc->generate_master_secret(s,
2694 s->session->master_key,
2695 tmp_buf, sizeof tmp_buf);
2697 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2698 OPENSSL_cleanse(epms, outl);
2701 #ifndef OPENSSL_NO_DH
2702 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2704 DH *dh_srvr,*dh_clnt;
2705 SESS_CERT *scert = s->session->sess_cert;
2709 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2710 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2714 if (scert->peer_dh_tmp != NULL)
2715 dh_srvr=scert->peer_dh_tmp;
2718 /* we get them from the cert */
2719 int idx = scert->peer_cert_type;
2720 EVP_PKEY *spkey = NULL;
2723 spkey = X509_get_pubkey(
2724 scert->peer_pkeys[idx].x509);
2727 dh_srvr = EVP_PKEY_get1_DH(spkey);
2728 EVP_PKEY_free(spkey);
2730 if (dh_srvr == NULL)
2732 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2733 ERR_R_INTERNAL_ERROR);
2737 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2739 /* Use client certificate key */
2740 EVP_PKEY *clkey = s->cert->key->privatekey;
2743 dh_clnt = EVP_PKEY_get1_DH(clkey);
2744 if (dh_clnt == NULL)
2746 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2747 ERR_R_INTERNAL_ERROR);
2753 /* generate a new random key */
2754 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2756 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2759 if (!DH_generate_key(dh_clnt))
2761 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2767 /* use the 'p' output buffer for the DH key, but
2768 * make sure to clear it out afterwards */
2770 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2771 if (scert->peer_dh_tmp == NULL)
2776 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2781 /* generate master key from the result */
2782 s->session->master_key_length=
2783 s->method->ssl3_enc->generate_master_secret(s,
2784 s->session->master_key,p,n);
2788 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2792 /* send off the data */
2793 n=BN_num_bytes(dh_clnt->pub_key);
2795 BN_bn2bin(dh_clnt->pub_key,p);
2801 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2805 #ifndef OPENSSL_NO_ECDH
2806 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2808 const EC_GROUP *srvr_group = NULL;
2810 int ecdh_clnt_cert = 0;
2813 if (s->session->sess_cert == NULL)
2815 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2816 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2820 /* Did we send out the client's
2821 * ECDH share for use in premaster
2822 * computation as part of client certificate?
2823 * If so, set ecdh_clnt_cert to 1.
2825 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2827 /* XXX: For now, we do not support client
2828 * authentication using ECDH certificates.
2829 * To add such support, one needs to add
2830 * code that checks for appropriate
2831 * conditions and sets ecdh_clnt_cert to 1.
2832 * For example, the cert have an ECC
2833 * key on the same curve as the server's
2834 * and the key should be authorized for
2837 * One also needs to add code in ssl3_connect
2838 * to skip sending the certificate verify
2841 * if ((s->cert->key->privatekey != NULL) &&
2842 * (s->cert->key->privatekey->type ==
2843 * EVP_PKEY_EC) && ...)
2844 * ecdh_clnt_cert = 1;
2848 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2850 tkey = s->session->sess_cert->peer_ecdh_tmp;
2854 /* Get the Server Public Key from Cert */
2855 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2856 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2857 if ((srvr_pub_pkey == NULL) ||
2858 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2859 (srvr_pub_pkey->pkey.ec == NULL))
2861 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2862 ERR_R_INTERNAL_ERROR);
2866 tkey = srvr_pub_pkey->pkey.ec;
2869 srvr_group = EC_KEY_get0_group(tkey);
2870 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2872 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2874 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2875 ERR_R_INTERNAL_ERROR);
2879 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2881 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2885 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2887 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2892 /* Reuse key info from our certificate
2893 * We only need our private key to perform
2894 * the ECDH computation.
2896 const BIGNUM *priv_key;
2897 tkey = s->cert->key->privatekey->pkey.ec;
2898 priv_key = EC_KEY_get0_private_key(tkey);
2899 if (priv_key == NULL)
2901 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2904 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2906 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2912 /* Generate a new ECDH key pair */
2913 if (!(EC_KEY_generate_key(clnt_ecdh)))
2915 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2920 /* use the 'p' output buffer for the ECDH key, but
2921 * make sure to clear it out afterwards
2924 field_size = EC_GROUP_get_degree(srvr_group);
2925 if (field_size <= 0)
2927 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2931 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2934 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2939 /* generate master key from the result */
2940 s->session->master_key_length = s->method->ssl3_enc \
2941 -> generate_master_secret(s,
2942 s->session->master_key,
2945 memset(p, 0, n); /* clean up */
2949 /* Send empty client key exch message */
2954 /* First check the size of encoding and
2955 * allocate memory accordingly.
2958 EC_POINT_point2oct(srvr_group,
2959 EC_KEY_get0_public_key(clnt_ecdh),
2960 POINT_CONVERSION_UNCOMPRESSED,
2963 encodedPoint = (unsigned char *)
2964 OPENSSL_malloc(encoded_pt_len *
2965 sizeof(unsigned char));
2966 bn_ctx = BN_CTX_new();
2967 if ((encodedPoint == NULL) ||
2970 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2974 /* Encode the public key */
2975 n = EC_POINT_point2oct(srvr_group,
2976 EC_KEY_get0_public_key(clnt_ecdh),
2977 POINT_CONVERSION_UNCOMPRESSED,
2978 encodedPoint, encoded_pt_len, bn_ctx);
2980 *p = n; /* length of encoded point */
2981 /* Encoded point will be copied here */
2983 /* copy the point */
2984 memcpy((unsigned char *)p, encodedPoint, n);
2985 /* increment n to account for length field */
2989 /* Free allocated memory */
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);
2996 #endif /* !OPENSSL_NO_ECDH */
2997 else if (alg_k & SSL_kGOST)
2999 /* GOST key exchange message creation */
3000 EVP_PKEY_CTX *pkey_ctx;
3003 unsigned int md_len;
3005 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
3006 EVP_MD_CTX *ukm_hash;
3009 /* Get server sertificate PKEY and create ctx from it */
3010 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
3012 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
3014 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
3018 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
3019 /* If we have send a certificate, and certificate key
3021 * parameters match those of server certificate, use
3022 * certificate key for key exchange
3025 /* Otherwise, generate ephemeral key pair */
3027 EVP_PKEY_encrypt_init(pkey_ctx);
3028 /* Generate session key */
3029 RAND_bytes(premaster_secret,32);
3030 /* If we have client certificate, use its secret as peer key */
3031 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
3032 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
3033 /* If there was an error - just ignore it. Ephemeral key
3039 /* Compute shared IV and store it in algorithm-specific
3041 ukm_hash = EVP_MD_CTX_create();
3042 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
3043 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
3044 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
3045 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
3046 EVP_MD_CTX_destroy(ukm_hash);
3047 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
3049 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3053 /* Make GOST keytransport blob message */
3054 /*Encapsulate it into sequence */
3055 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
3057 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
3058 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3065 *(p++)= msglen & 0xff;
3070 *(p++)= msglen & 0xff;
3073 memcpy(p, tmp, msglen);
3074 /* Check if pubkey from client certificate was used */
3075 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
3077 /* Set flag "skip certificate verify" */
3078 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3080 EVP_PKEY_CTX_free(pkey_ctx);
3081 s->session->master_key_length=
3082 s->method->ssl3_enc->generate_master_secret(s,
3083 s->session->master_key,premaster_secret,32);
3084 EVP_PKEY_free(pub_key);
3087 #ifndef OPENSSL_NO_SRP
3088 else if (alg_k & SSL_kSRP)
3090 if (s->srp_ctx.A != NULL)
3092 /* send off the data */
3093 n=BN_num_bytes(s->srp_ctx.A);
3095 BN_bn2bin(s->srp_ctx.A,p);
3100 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3103 if (s->session->srp_username != NULL)
3104 OPENSSL_free(s->session->srp_username);
3105 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3106 if (s->session->srp_username == NULL)
3108 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3109 ERR_R_MALLOC_FAILURE);
3113 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3115 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3120 #ifndef OPENSSL_NO_PSK
3121 else if (alg_k & SSL_kPSK)
3123 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes
3124 * to return a \0-terminated identity. The last byte
3125 * is for us for simulating strnlen. */
3126 char identity[PSK_MAX_IDENTITY_LEN + 2];
3127 size_t identity_len;
3128 unsigned char *t = NULL;
3129 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3130 unsigned int pre_ms_len = 0, psk_len = 0;
3134 if (s->psk_client_callback == NULL)
3136 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3137 SSL_R_PSK_NO_CLIENT_CB);
3141 memset(identity, 0, sizeof(identity));
3142 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3143 identity, sizeof(identity) - 1,
3144 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3145 if (psk_len > PSK_MAX_PSK_LEN)
3147 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3148 ERR_R_INTERNAL_ERROR);
3151 else if (psk_len == 0)
3153 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3154 SSL_R_PSK_IDENTITY_NOT_FOUND);
3157 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
3158 identity_len = strlen(identity);
3159 if (identity_len > PSK_MAX_IDENTITY_LEN)
3161 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3162 ERR_R_INTERNAL_ERROR);
3165 /* create PSK pre_master_secret */
3166 pre_ms_len = 2+psk_len+2+psk_len;
3168 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3170 memset(t, 0, psk_len);
3174 if (s->session->psk_identity_hint != NULL)
3175 OPENSSL_free(s->session->psk_identity_hint);
3176 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3177 if (s->ctx->psk_identity_hint != NULL &&
3178 s->session->psk_identity_hint == NULL)
3180 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3181 ERR_R_MALLOC_FAILURE);
3185 if (s->session->psk_identity != NULL)
3186 OPENSSL_free(s->session->psk_identity);
3187 s->session->psk_identity = BUF_strdup(identity);
3188 if (s->session->psk_identity == NULL)
3190 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3191 ERR_R_MALLOC_FAILURE);
3195 s->session->master_key_length =
3196 s->method->ssl3_enc->generate_master_secret(s,
3197 s->session->master_key,
3198 psk_or_pre_ms, pre_ms_len);
3199 s2n(identity_len, p);
3200 memcpy(p, identity, identity_len);
3201 n = 2 + identity_len;
3204 OPENSSL_cleanse(identity, sizeof(identity));
3205 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3208 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3215 ssl3_send_alert(s, SSL3_AL_FATAL,
3216 SSL_AD_HANDSHAKE_FAILURE);
3217 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3218 ERR_R_INTERNAL_ERROR);
3222 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3223 s->state=SSL3_ST_CW_KEY_EXCH_B;
3226 /* SSL3_ST_CW_KEY_EXCH_B */
3227 return ssl_do_write(s);
3229 #ifndef OPENSSL_NO_ECDH
3230 BN_CTX_free(bn_ctx);
3231 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3232 if (clnt_ecdh != NULL)
3233 EC_KEY_free(clnt_ecdh);
3234 EVP_PKEY_free(srvr_pub_pkey);
3239 int ssl3_send_client_verify(SSL *s)
3242 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3244 EVP_PKEY_CTX *pctx=NULL;
3250 EVP_MD_CTX_init(&mctx);
3252 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3254 p= ssl_handshake_start(s);
3255 pkey=s->cert->key->privatekey;
3256 /* Create context from key and test if sha1 is allowed as digest */
3257 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3258 EVP_PKEY_sign_init(pctx);
3259 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3261 if (!SSL_USE_SIGALGS(s))
3262 s->method->ssl3_enc->cert_verify_mac(s,
3264 &(data[MD5_DIGEST_LENGTH]));
3270 /* For TLS v1.2 send signature algorithm and signature
3271 * using agreed digest and cached handshake records.
3273 if (SSL_USE_SIGALGS(s))
3277 const EVP_MD *md = s->cert->key->digest;
3278 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3280 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3282 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3283 ERR_R_INTERNAL_ERROR);
3288 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3291 if (!EVP_SignInit_ex(&mctx, md, NULL)
3292 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3293 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3295 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3301 if (!ssl3_digest_cached_records(s))
3305 #ifndef OPENSSL_NO_RSA
3306 if (pkey->type == EVP_PKEY_RSA)
3308 s->method->ssl3_enc->cert_verify_mac(s,
3311 if (RSA_sign(NID_md5_sha1, data,
3312 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3313 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3315 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3323 #ifndef OPENSSL_NO_DSA
3324 if (pkey->type == EVP_PKEY_DSA)
3326 if (!DSA_sign(pkey->save_type,
3327 &(data[MD5_DIGEST_LENGTH]),
3328 SHA_DIGEST_LENGTH,&(p[2]),
3329 (unsigned int *)&j,pkey->pkey.dsa))
3331 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3339 #ifndef OPENSSL_NO_ECDSA
3340 if (pkey->type == EVP_PKEY_EC)
3342 if (!ECDSA_sign(pkey->save_type,
3343 &(data[MD5_DIGEST_LENGTH]),
3344 SHA_DIGEST_LENGTH,&(p[2]),
3345 (unsigned int *)&j,pkey->pkey.ec))
3347 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3356 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3358 unsigned char signbuf[64];
3361 s->method->ssl3_enc->cert_verify_mac(s,
3362 NID_id_GostR3411_94,
3364 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3365 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3366 ERR_R_INTERNAL_ERROR);
3369 for (i=63,j=0; i>=0; j++, i--) {
3377 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3380 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3381 s->state=SSL3_ST_CW_CERT_VRFY_B;
3383 EVP_MD_CTX_cleanup(&mctx);
3384 EVP_PKEY_CTX_free(pctx);
3385 return ssl_do_write(s);
3387 EVP_MD_CTX_cleanup(&mctx);
3388 EVP_PKEY_CTX_free(pctx);
3392 /* Check a certificate can be used for client authentication. Currently
3393 * check cert exists, if we have a suitable digest for TLS 1.2 if
3394 * static DH client certificates can be used and optionally checks
3395 * suitability for Suite B.
3397 static int ssl3_check_client_certificate(SSL *s)
3399 unsigned long alg_k;
3400 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3402 /* If no suitable signature algorithm can't use certificate */
3403 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3405 /* If strict mode check suitability of chain before using it.
3406 * This also adjusts suite B digest if necessary.
3408 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3409 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3411 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3412 /* See if we can use client certificate for fixed DH */
3413 if (alg_k & (SSL_kDHr|SSL_kDHd))
3415 SESS_CERT *scert = s->session->sess_cert;
3416 int i = scert->peer_cert_type;
3417 EVP_PKEY *clkey = NULL, *spkey = NULL;
3418 clkey = s->cert->key->privatekey;
3419 /* If client key not DH assume it can be used */
3420 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3423 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3426 /* Compare server and client parameters */
3427 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3428 EVP_PKEY_free(spkey);
3432 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3437 int ssl3_send_client_certificate(SSL *s)
3440 EVP_PKEY *pkey=NULL;
3443 if (s->state == SSL3_ST_CW_CERT_A)
3445 /* Let cert callback update client certificates if required */
3446 if (s->cert->cert_cb)
3448 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3451 s->rwstate=SSL_X509_LOOKUP;
3456 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3459 s->rwstate=SSL_NOTHING;
3461 if (ssl3_check_client_certificate(s))
3462 s->state=SSL3_ST_CW_CERT_C;
3464 s->state=SSL3_ST_CW_CERT_B;
3467 /* We need to get a client cert */
3468 if (s->state == SSL3_ST_CW_CERT_B)
3470 /* If we get an error, we need to
3471 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3472 * We then get retied later */
3474 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3477 s->rwstate=SSL_X509_LOOKUP;
3480 s->rwstate=SSL_NOTHING;
3481 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3483 s->state=SSL3_ST_CW_CERT_B;
3484 if ( !SSL_use_certificate(s,x509) ||
3485 !SSL_use_PrivateKey(s,pkey))
3491 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3494 if (x509 != NULL) X509_free(x509);
3495 if (pkey != NULL) EVP_PKEY_free(pkey);
3496 if (i && !ssl3_check_client_certificate(s))
3500 if (s->version == SSL3_VERSION)
3502 s->s3->tmp.cert_req=0;
3503 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3508 s->s3->tmp.cert_req=2;
3512 /* Ok, we have a cert */
3513 s->state=SSL3_ST_CW_CERT_C;
3516 if (s->state == SSL3_ST_CW_CERT_C)
3518 s->state=SSL3_ST_CW_CERT_D;
3519 if (!ssl3_output_cert_chain(s,
3520 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3522 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3523 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3527 /* SSL3_ST_CW_CERT_D */
3528 return ssl_do_write(s);
3531 #define has_bits(i,m) (((i)&(m)) == (m))
3533 int ssl3_check_cert_and_algorithm(SSL *s)
3537 EVP_PKEY *pkey=NULL;
3539 #ifndef OPENSSL_NO_RSA
3542 #ifndef OPENSSL_NO_DH
3546 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3547 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3549 /* we don't have a certificate */
3550 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3553 sc=s->session->sess_cert;
3556 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3560 #ifndef OPENSSL_NO_RSA
3561 rsa=s->session->sess_cert->peer_rsa_tmp;
3563 #ifndef OPENSSL_NO_DH
3564 dh=s->session->sess_cert->peer_dh_tmp;
3567 /* This is the passed certificate */
3569 idx=sc->peer_cert_type;
3570 #ifndef OPENSSL_NO_ECDH
3571 if (idx == SSL_PKEY_ECC)
3573 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3575 { /* check failed */
3576 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3584 else if (alg_a & SSL_aECDSA)
3586 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3589 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3591 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3595 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3596 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3597 EVP_PKEY_free(pkey);
3600 /* Check that we have a certificate if we require one */
3601 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3603 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3606 #ifndef OPENSSL_NO_DSA
3607 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3609 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3613 #ifndef OPENSSL_NO_RSA
3614 if ((alg_k & SSL_kRSA) &&
3615 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3617 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3621 #ifndef OPENSSL_NO_DH
3622 if ((alg_k & SSL_kDHE) &&
3623 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3625 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3628 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3629 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3631 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3634 #ifndef OPENSSL_NO_DSA
3635 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3636 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3638 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3644 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3646 #ifndef OPENSSL_NO_RSA
3647 if (alg_k & SSL_kRSA)
3650 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3652 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3658 #ifndef OPENSSL_NO_DH
3659 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3662 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3664 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3671 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3677 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3682 /* Check to see if handshake is full or resumed. Usually this is just a
3683 * case of checking to see if a cache hit has occurred. In the case of
3684 * session tickets we have to check the next message to be sure.
3687 #ifndef OPENSSL_NO_TLSEXT
3688 # ifndef OPENSSL_NO_NEXTPROTONEG
3689 int ssl3_send_next_proto(SSL *s)
3691 unsigned int len, padding_len;
3694 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3696 len = s->next_proto_negotiated_len;
3697 padding_len = 32 - ((len + 2) % 32);
3698 d = (unsigned char *)s->init_buf->data;
3700 memcpy(d + 5, s->next_proto_negotiated, len);
3701 d[5 + len] = padding_len;
3702 memset(d + 6 + len, 0, padding_len);
3703 *(d++)=SSL3_MT_NEXT_PROTO;
3704 l2n3(2 + len + padding_len, d);
3705 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3706 s->init_num = 4 + 2 + len + padding_len;
3710 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3714 int ssl3_check_finished(SSL *s)
3719 /* If we have no ticket it cannot be a resumed session. */
3720 if (!s->session->tlsext_tick)
3722 /* this function is called when we really expect a Certificate
3723 * message, so permit appropriate message length */
3724 n=s->method->ssl_get_message(s,
3730 if (!ok) return((int)n);
3731 s->s3->tmp.reuse_message = 1;
3733 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3734 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3741 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3744 #ifndef OPENSSL_NO_ENGINE
3745 if (s->ctx->client_cert_engine)
3747 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3748 SSL_get_client_CA_list(s),
3749 px509, ppkey, NULL, NULL, NULL);
3754 if (s->ctx->client_cert_cb)
3755 i = s->ctx->client_cert_cb(s,px509,ppkey);