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 s->state=SSL3_ST_CR_CERT_A;
314 #ifndef OPENSSL_NO_TLSEXT
315 case SSL3_ST_CR_SUPPLEMENTAL_DATA_A:
316 case SSL3_ST_CR_SUPPLEMENTAL_DATA_B:
317 ret = tls1_get_server_supplemental_data(s);
318 if (ret <= 0) goto end;
319 s->state=SSL3_ST_CR_CERT_A;
323 case SSL3_ST_CR_CERT_A:
324 case SSL3_ST_CR_CERT_B:
325 #ifndef OPENSSL_NO_TLSEXT
326 ret=ssl3_check_finished(s);
327 if (ret <= 0) goto end;
330 s->state=SSL3_ST_CR_SUPPLEMENTAL_DATA_A;
337 if (s->tlsext_ticket_expected)
338 s->state=SSL3_ST_CR_SESSION_TICKET_A;
340 s->state=SSL3_ST_CR_FINISHED_A;
345 /* Check if it is anon DH/ECDH */
347 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
348 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
350 ret=ssl3_get_server_certificate(s);
351 if (ret <= 0) goto end;
352 #ifndef OPENSSL_NO_TLSEXT
353 if (s->tlsext_status_expected)
354 s->state=SSL3_ST_CR_CERT_STATUS_A;
356 s->state=SSL3_ST_CR_KEY_EXCH_A;
361 s->state=SSL3_ST_CR_KEY_EXCH_A;
368 s->state=SSL3_ST_CR_KEY_EXCH_A;
373 case SSL3_ST_CR_KEY_EXCH_A:
374 case SSL3_ST_CR_KEY_EXCH_B:
375 ret=ssl3_get_key_exchange(s);
376 if (ret <= 0) goto end;
377 s->state=SSL3_ST_CR_CERT_REQ_A;
380 /* at this point we check that we have the
381 * required stuff from the server */
382 if (!ssl3_check_cert_and_algorithm(s))
389 case SSL3_ST_CR_CERT_REQ_A:
390 case SSL3_ST_CR_CERT_REQ_B:
391 ret=ssl3_get_certificate_request(s);
392 if (ret <= 0) goto end;
393 s->state=SSL3_ST_CR_SRVR_DONE_A;
397 case SSL3_ST_CR_SRVR_DONE_A:
398 case SSL3_ST_CR_SRVR_DONE_B:
399 ret=ssl3_get_server_done(s);
400 if (ret <= 0) goto end;
401 #ifndef OPENSSL_NO_SRP
402 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
404 if ((ret = SRP_Calc_A_param(s))<=0)
406 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
407 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
412 #ifndef OPENSSL_NO_TLSEXT
413 s->state=SSL3_ST_CW_SUPPLEMENTAL_DATA_A;
415 if (s->s3->tmp.cert_req)
416 s->state=SSL3_ST_CW_CERT_A;
418 s->state=SSL3_ST_CW_KEY_EXCH_A;
424 case SSL3_ST_CW_CERT_A:
425 case SSL3_ST_CW_CERT_B:
426 case SSL3_ST_CW_CERT_C:
427 case SSL3_ST_CW_CERT_D:
428 ret=ssl3_send_client_certificate(s);
429 if (ret <= 0) goto end;
430 s->state=SSL3_ST_CW_KEY_EXCH_A;
434 case SSL3_ST_CW_KEY_EXCH_A:
435 case SSL3_ST_CW_KEY_EXCH_B:
436 ret=ssl3_send_client_key_exchange(s);
437 if (ret <= 0) goto end;
438 /* EAY EAY EAY need to check for DH fix cert
440 /* For TLS, cert_req is set to 2, so a cert chain
441 * of nothing is sent, but no verify packet is sent */
442 /* XXX: For now, we do not support client
443 * authentication in ECDH cipher suites with
444 * ECDH (rather than ECDSA) certificates.
445 * We need to skip the certificate verify
446 * message when client's ECDH public key is sent
447 * inside the client certificate.
449 if (s->s3->tmp.cert_req == 1)
451 s->state=SSL3_ST_CW_CERT_VRFY_A;
455 s->state=SSL3_ST_CW_CHANGE_A;
456 s->s3->change_cipher_spec=0;
458 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
460 s->state=SSL3_ST_CW_CHANGE_A;
461 s->s3->change_cipher_spec=0;
467 case SSL3_ST_CW_CERT_VRFY_A:
468 case SSL3_ST_CW_CERT_VRFY_B:
469 ret=ssl3_send_client_verify(s);
470 if (ret <= 0) goto end;
471 s->state=SSL3_ST_CW_CHANGE_A;
473 s->s3->change_cipher_spec=0;
476 case SSL3_ST_CW_CHANGE_A:
477 case SSL3_ST_CW_CHANGE_B:
478 ret=ssl3_send_change_cipher_spec(s,
479 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
480 if (ret <= 0) goto end;
482 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
483 s->state=SSL3_ST_CW_FINISHED_A;
485 if (s->s3->next_proto_neg_seen)
486 s->state=SSL3_ST_CW_NEXT_PROTO_A;
488 s->state=SSL3_ST_CW_FINISHED_A;
492 s->session->cipher=s->s3->tmp.new_cipher;
493 #ifdef OPENSSL_NO_COMP
494 s->session->compress_meth=0;
496 if (s->s3->tmp.new_compression == NULL)
497 s->session->compress_meth=0;
499 s->session->compress_meth=
500 s->s3->tmp.new_compression->id;
502 if (!s->method->ssl3_enc->setup_key_block(s))
508 if (!s->method->ssl3_enc->change_cipher_state(s,
509 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
517 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
518 case SSL3_ST_CW_NEXT_PROTO_A:
519 case SSL3_ST_CW_NEXT_PROTO_B:
520 ret=ssl3_send_next_proto(s);
521 if (ret <= 0) goto end;
522 s->state=SSL3_ST_CW_FINISHED_A;
526 #ifndef OPENSSL_NO_TLSEXT
527 case SSL3_ST_CW_SUPPLEMENTAL_DATA_A:
528 case SSL3_ST_CW_SUPPLEMENTAL_DATA_B:
529 ret = tls1_send_client_supplemental_data(s, &skip);
530 if (ret <= 0) goto end;
531 if (s->s3->tmp.cert_req)
532 s->state=SSL3_ST_CW_CERT_A;
534 s->state=SSL3_ST_CW_KEY_EXCH_A;
539 case SSL3_ST_CW_FINISHED_A:
540 case SSL3_ST_CW_FINISHED_B:
541 ret=ssl3_send_finished(s,
542 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
543 s->method->ssl3_enc->client_finished_label,
544 s->method->ssl3_enc->client_finished_label_len);
545 if (ret <= 0) goto end;
546 s->state=SSL3_ST_CW_FLUSH;
549 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
552 s->s3->tmp.next_state=SSL_ST_OK;
553 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
556 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
557 s->s3->delay_buf_pop_ret=0;
562 #ifndef OPENSSL_NO_TLSEXT
563 /* Allow NewSessionTicket if ticket expected */
564 if (s->tlsext_ticket_expected)
565 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
569 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
574 #ifndef OPENSSL_NO_TLSEXT
575 case SSL3_ST_CR_SESSION_TICKET_A:
576 case SSL3_ST_CR_SESSION_TICKET_B:
577 ret=ssl3_get_new_session_ticket(s);
578 if (ret <= 0) goto end;
579 s->state=SSL3_ST_CR_FINISHED_A;
583 case SSL3_ST_CR_CERT_STATUS_A:
584 case SSL3_ST_CR_CERT_STATUS_B:
585 ret=ssl3_get_cert_status(s);
586 if (ret <= 0) goto end;
587 s->state=SSL3_ST_CR_KEY_EXCH_A;
592 case SSL3_ST_CR_FINISHED_A:
593 case SSL3_ST_CR_FINISHED_B:
595 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
596 SSL3_ST_CR_FINISHED_B);
597 if (ret <= 0) goto end;
600 s->state=SSL3_ST_CW_CHANGE_A;
606 case SSL3_ST_CW_FLUSH:
607 s->rwstate=SSL_WRITING;
608 if (BIO_flush(s->wbio) <= 0)
613 s->rwstate=SSL_NOTHING;
614 s->state=s->s3->tmp.next_state;
618 /* clean a few things up */
619 ssl3_cleanup_key_block(s);
621 if (s->init_buf != NULL)
623 BUF_MEM_free(s->init_buf);
627 /* If we are not 'joining' the last two packets,
628 * remove the buffering now */
629 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
630 ssl_free_wbio_buffer(s);
631 /* else do it later in ssl3_write */
637 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
638 if (s->hit) s->ctx->stats.sess_hit++;
642 s->handshake_func=ssl3_connect;
643 s->ctx->stats.sess_connect_good++;
645 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
651 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
657 /* did we do anything */
658 if (!s->s3->tmp.reuse_message && !skip)
662 if ((ret=BIO_flush(s->wbio)) <= 0)
666 if ((cb != NULL) && (s->state != state))
670 cb(s,SSL_CB_CONNECT_LOOP,1);
681 cb(s,SSL_CB_CONNECT_EXIT,ret);
686 int ssl3_client_hello(SSL *s)
693 #ifndef OPENSSL_NO_COMP
698 buf=(unsigned char *)s->init_buf->data;
699 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
701 SSL_SESSION *sess = s->session;
702 if ((sess == NULL) ||
703 (sess->ssl_version != s->version) ||
704 #ifdef OPENSSL_NO_TLSEXT
705 !sess->session_id_length ||
707 (!sess->session_id_length && !sess->tlsext_tick) ||
709 (sess->not_resumable))
711 if (!ssl_get_new_session(s,0))
714 if (s->method->version == DTLS_ANY_VERSION)
716 /* Determine which DTLS version to use */
717 int options = s->options;
718 /* If DTLS 1.2 disabled correct the version number */
719 if (options & SSL_OP_NO_DTLSv1_2)
723 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
726 /* Disabling all versions is silly: return an
729 if (options & SSL_OP_NO_DTLSv1)
731 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
734 /* Update method so we don't use any DTLS 1.2
737 s->method = DTLSv1_client_method();
738 s->version = DTLS1_VERSION;
742 /* We only support one version: update method */
743 if (options & SSL_OP_NO_DTLSv1)
744 s->method = DTLSv1_2_client_method();
745 s->version = DTLS1_2_VERSION;
747 s->client_version = s->version;
749 /* else use the pre-loaded session */
751 p=s->s3->client_random;
753 /* for DTLS if client_random is initialized, reuse it, we are
754 * required to use same upon reply to HelloVerify */
759 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
772 ssl_fill_hello_random(s, 0, p,
773 sizeof(s->s3->client_random));
775 /* Do the message type and length last */
776 d=p= ssl_handshake_start(s);
778 /* version indicates the negotiated version: for example from
779 * an SSLv2/v3 compatible client hello). The client_version
780 * field is the maximum version we permit and it is also
781 * used in RSA encrypted premaster secrets. Some servers can
782 * choke if we initially report a higher version then
783 * renegotiate to a lower one in the premaster secret. This
784 * didn't happen with TLS 1.0 as most servers supported it
785 * but it can with TLS 1.1 or later if the server only supports
788 * Possible scenario with previous logic:
789 * 1. Client hello indicates TLS 1.2
790 * 2. Server hello says TLS 1.0
791 * 3. RSA encrypted premaster secret uses 1.2.
792 * 4. Handhaked proceeds using TLS 1.0.
793 * 5. Server sends hello request to renegotiate.
794 * 6. Client hello indicates TLS v1.0 as we now
795 * know that is maximum server supports.
796 * 7. Server chokes on RSA encrypted premaster secret
797 * containing version 1.0.
799 * For interoperability it should be OK to always use the
800 * maximum version we support in client hello and then rely
801 * on the checking of version to ensure the servers isn't
802 * being inconsistent: for example initially negotiating with
803 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
804 * client_version in client hello and not resetting it to
805 * the negotiated version.
808 *(p++)=s->version>>8;
809 *(p++)=s->version&0xff;
810 s->client_version=s->version;
812 *(p++)=s->client_version>>8;
813 *(p++)=s->client_version&0xff;
817 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
824 i=s->session->session_id_length;
828 if (i > (int)sizeof(s->session->session_id))
830 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
833 memcpy(p,s->session->session_id,i);
837 /* cookie stuff for DTLS */
840 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
842 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
845 *(p++) = s->d1->cookie_len;
846 memcpy(p, s->d1->cookie, s->d1->cookie_len);
847 p += s->d1->cookie_len;
850 /* Ciphers supported */
851 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
854 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
857 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
858 /* Some servers hang if client hello > 256 bytes
859 * as hack workaround chop number of supported ciphers
860 * to keep it well below this if we use TLS v1.2
862 if (TLS1_get_version(s) >= TLS1_2_VERSION
863 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
864 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
870 #ifdef OPENSSL_NO_COMP
874 if ((s->options & SSL_OP_NO_COMPRESSION)
875 || !s->ctx->comp_methods)
878 j=sk_SSL_COMP_num(s->ctx->comp_methods);
882 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
886 *(p++)=0; /* Add the NULL method */
888 #ifndef OPENSSL_NO_TLSEXT
890 if (ssl_prepare_clienthello_tlsext(s) <= 0)
892 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
895 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
897 ssl3_send_alert(s,SSL3_AL_FATAL,al);
898 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
904 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
905 s->state=SSL3_ST_CW_CLNT_HELLO_B;
908 /* SSL3_ST_CW_CLNT_HELLO_B */
909 return ssl_do_write(s);
914 int ssl3_get_server_hello(SSL *s)
916 STACK_OF(SSL_CIPHER) *sk;
920 int i,al=SSL_AD_INTERNAL_ERROR,ok;
923 #ifndef OPENSSL_NO_COMP
926 /* Hello verify request and/or server hello version may not
927 * match so set first packet if we're negotiating version.
932 n=s->method->ssl_get_message(s,
933 SSL3_ST_CR_SRVR_HELLO_A,
934 SSL3_ST_CR_SRVR_HELLO_B,
939 if (!ok) return((int)n);
944 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
946 if ( s->d1->send_cookie == 0)
948 s->s3->tmp.reuse_message = 1;
951 else /* already sent a cookie */
953 al=SSL_AD_UNEXPECTED_MESSAGE;
954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
960 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
962 al=SSL_AD_UNEXPECTED_MESSAGE;
963 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
967 d=p=(unsigned char *)s->init_msg;
968 if (s->method->version == DTLS_ANY_VERSION)
970 /* Work out correct protocol version to use */
971 int hversion = (p[0] << 8)|p[1];
972 int options = s->options;
973 if (hversion == DTLS1_2_VERSION
974 && !(options & SSL_OP_NO_DTLSv1_2))
975 s->method = DTLSv1_2_client_method();
976 else if (tls1_suiteb(s))
978 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
979 s->version = hversion;
980 al = SSL_AD_PROTOCOL_VERSION;
983 else if (hversion == DTLS1_VERSION
984 && !(options & SSL_OP_NO_DTLSv1))
985 s->method = DTLSv1_client_method();
988 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
989 s->version = hversion;
990 al = SSL_AD_PROTOCOL_VERSION;
993 s->version = s->client_version = s->method->version;
996 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
998 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
999 s->version=(s->version&0xff00)|p[1];
1000 al=SSL_AD_PROTOCOL_VERSION;
1005 /* load the server hello data */
1006 /* load the server random */
1007 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
1008 p+=SSL3_RANDOM_SIZE;
1010 /* get the session-id */
1013 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
1015 al=SSL_AD_ILLEGAL_PARAMETER;
1016 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
1020 #ifndef OPENSSL_NO_TLSEXT
1021 /* check if we want to resume the session based on external pre-shared secret */
1022 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1024 SSL_CIPHER *pref_cipher=NULL;
1025 s->session->master_key_length=sizeof(s->session->master_key);
1026 if (s->tls_session_secret_cb(s, s->session->master_key,
1027 &s->session->master_key_length,
1029 s->tls_session_secret_cb_arg))
1031 s->session->cipher = pref_cipher ?
1032 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1035 #endif /* OPENSSL_NO_TLSEXT */
1037 if (j != 0 && j == s->session->session_id_length
1038 && memcmp(p,s->session->session_id,j) == 0)
1040 if(s->sid_ctx_length != s->session->sid_ctx_length
1041 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1043 /* actually a client application bug */
1044 al=SSL_AD_ILLEGAL_PARAMETER;
1045 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1050 else /* a miss or crap from the other end */
1052 /* If we were trying for session-id reuse, make a new
1053 * SSL_SESSION so we don't stuff up other people */
1055 if (s->session->session_id_length > 0)
1057 if (!ssl_get_new_session(s,0))
1062 s->session->session_id_length=j;
1063 memcpy(s->session->session_id,p,j); /* j could be 0 */
1066 c=ssl_get_cipher_by_char(s,p);
1069 /* unknown cipher */
1070 al=SSL_AD_ILLEGAL_PARAMETER;
1071 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1074 /* If it is a disabled cipher we didn't send it in client hello,
1075 * so return an error.
1077 if (c->algorithm_ssl & ct->mask_ssl ||
1078 c->algorithm_mkey & ct->mask_k ||
1079 c->algorithm_auth & ct->mask_a)
1081 al=SSL_AD_ILLEGAL_PARAMETER;
1082 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1085 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1087 sk=ssl_get_ciphers_by_id(s);
1088 i=sk_SSL_CIPHER_find(sk,c);
1091 /* we did not say we would use this cipher */
1092 al=SSL_AD_ILLEGAL_PARAMETER;
1093 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1097 /* Depending on the session caching (internal/external), the cipher
1098 and/or cipher_id values may not be set. Make sure that
1099 cipher_id is set and use it for comparison. */
1100 if (s->session->cipher)
1101 s->session->cipher_id = s->session->cipher->id;
1102 if (s->hit && (s->session->cipher_id != c->id))
1104 /* Workaround is now obsolete */
1107 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1110 al=SSL_AD_ILLEGAL_PARAMETER;
1111 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1115 s->s3->tmp.new_cipher=c;
1116 /* Don't digest cached records if no sigalgs: we may need them for
1117 * client authentication.
1119 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1121 /* lets get the compression algorithm */
1123 #ifdef OPENSSL_NO_COMP
1126 al=SSL_AD_ILLEGAL_PARAMETER;
1127 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1130 /* If compression is disabled we'd better not try to resume a session
1131 * using compression.
1133 if (s->session->compress_meth != 0)
1135 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1140 if (s->hit && j != s->session->compress_meth)
1142 al=SSL_AD_ILLEGAL_PARAMETER;
1143 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1148 else if (s->options & SSL_OP_NO_COMPRESSION)
1150 al=SSL_AD_ILLEGAL_PARAMETER;
1151 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1155 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1157 if ((j != 0) && (comp == NULL))
1159 al=SSL_AD_ILLEGAL_PARAMETER;
1160 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1165 s->s3->tmp.new_compression=comp;
1169 #ifndef OPENSSL_NO_TLSEXT
1171 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1173 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1180 /* wrong packet length */
1181 al=SSL_AD_DECODE_ERROR;
1182 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1188 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1193 int ssl3_get_server_certificate(SSL *s)
1195 int al,i,ok,ret= -1;
1196 unsigned long n,nc,llen,l;
1198 const unsigned char *q,*p;
1200 STACK_OF(X509) *sk=NULL;
1202 EVP_PKEY *pkey=NULL;
1203 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1205 n=s->method->ssl_get_message(s,
1212 if (!ok) return((int)n);
1214 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1215 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1216 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1218 s->s3->tmp.reuse_message=1;
1222 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1224 al=SSL_AD_UNEXPECTED_MESSAGE;
1225 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1228 p=d=(unsigned char *)s->init_msg;
1230 if ((sk=sk_X509_new_null()) == NULL)
1232 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1239 al=SSL_AD_DECODE_ERROR;
1240 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1243 for (nc=0; nc<llen; )
1246 if ((l+nc+3) > llen)
1248 al=SSL_AD_DECODE_ERROR;
1249 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1254 x=d2i_X509(NULL,&q,l);
1257 al=SSL_AD_BAD_CERTIFICATE;
1258 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1263 al=SSL_AD_DECODE_ERROR;
1264 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1267 if (!sk_X509_push(sk,x))
1269 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1277 i=ssl_verify_cert_chain(s,sk);
1278 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1279 #ifndef OPENSSL_NO_KRB5
1280 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1281 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1282 #endif /* OPENSSL_NO_KRB5 */
1285 al=ssl_verify_alarm_type(s->verify_result);
1286 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1289 ERR_clear_error(); /* but we keep s->verify_result */
1291 sc=ssl_sess_cert_new();
1292 if (sc == NULL) goto err;
1294 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1295 s->session->sess_cert=sc;
1298 /* Inconsistency alert: cert_chain does include the peer's
1299 * certificate, which we don't include in s3_srvr.c */
1300 x=sk_X509_value(sk,0);
1302 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1304 pkey=X509_get_pubkey(x);
1306 /* VRS: allow null cert if auth == KRB5 */
1307 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1308 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1312 printf("pkey,x = %p, %p\n", pkey,x);
1313 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1314 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1315 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1316 #endif /* KSSL_DEBUG */
1318 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1322 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1323 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1327 i=ssl_cert_type(x,pkey);
1328 if (need_cert && i < 0)
1332 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1333 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1339 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1340 if (exp_idx >= 0 && i != exp_idx)
1343 al=SSL_AD_ILLEGAL_PARAMETER;
1344 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1345 SSL_R_WRONG_CERTIFICATE_TYPE);
1348 sc->peer_cert_type=i;
1349 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1350 /* Why would the following ever happen?
1351 * We just created sc a couple of lines ago. */
1352 if (sc->peer_pkeys[i].x509 != NULL)
1353 X509_free(sc->peer_pkeys[i].x509);
1354 sc->peer_pkeys[i].x509=x;
1355 sc->peer_key= &(sc->peer_pkeys[i]);
1357 if (s->session->peer != NULL)
1358 X509_free(s->session->peer);
1359 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1364 sc->peer_cert_type=i;
1367 if (s->session->peer != NULL)
1368 X509_free(s->session->peer);
1369 s->session->peer=NULL;
1371 s->session->verify_result = s->verify_result;
1378 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1381 EVP_PKEY_free(pkey);
1383 sk_X509_pop_free(sk,X509_free);
1387 int ssl3_get_key_exchange(SSL *s)
1389 #ifndef OPENSSL_NO_RSA
1390 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1393 unsigned char *param,*p;
1394 int al,i,j,param_len,ok;
1396 EVP_PKEY *pkey=NULL;
1397 const EVP_MD *md = NULL;
1398 #ifndef OPENSSL_NO_RSA
1401 #ifndef OPENSSL_NO_DH
1404 #ifndef OPENSSL_NO_ECDH
1405 EC_KEY *ecdh = NULL;
1406 BN_CTX *bn_ctx = NULL;
1407 EC_POINT *srvr_ecpoint = NULL;
1409 int encoded_pt_len = 0;
1412 /* use same message size as in ssl3_get_certificate_request()
1413 * as ServerKeyExchange message may be skipped */
1414 n=s->method->ssl_get_message(s,
1415 SSL3_ST_CR_KEY_EXCH_A,
1416 SSL3_ST_CR_KEY_EXCH_B,
1420 if (!ok) return((int)n);
1422 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1424 #ifndef OPENSSL_NO_PSK
1425 /* In plain PSK ciphersuite, ServerKeyExchange can be
1426 omitted if no identity hint is sent. Set
1427 session->sess_cert anyway to avoid problems
1429 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1431 s->session->sess_cert=ssl_sess_cert_new();
1432 if (s->ctx->psk_identity_hint)
1433 OPENSSL_free(s->ctx->psk_identity_hint);
1434 s->ctx->psk_identity_hint = NULL;
1437 s->s3->tmp.reuse_message=1;
1441 param=p=(unsigned char *)s->init_msg;
1442 if (s->session->sess_cert != NULL)
1444 #ifndef OPENSSL_NO_RSA
1445 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1447 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1448 s->session->sess_cert->peer_rsa_tmp=NULL;
1451 #ifndef OPENSSL_NO_DH
1452 if (s->session->sess_cert->peer_dh_tmp)
1454 DH_free(s->session->sess_cert->peer_dh_tmp);
1455 s->session->sess_cert->peer_dh_tmp=NULL;
1458 #ifndef OPENSSL_NO_ECDH
1459 if (s->session->sess_cert->peer_ecdh_tmp)
1461 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1462 s->session->sess_cert->peer_ecdh_tmp=NULL;
1468 s->session->sess_cert=ssl_sess_cert_new();
1472 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1473 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1474 EVP_MD_CTX_init(&md_ctx);
1476 #ifndef OPENSSL_NO_PSK
1477 if (alg_k & SSL_kPSK)
1479 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1481 al=SSL_AD_HANDSHAKE_FAILURE;
1484 /* Store PSK identity hint for later use, hint is used
1485 * in ssl3_send_client_key_exchange. Assume that the
1486 * maximum length of a PSK identity hint can be as
1487 * long as the maximum length of a PSK identity. */
1488 if (i > PSK_MAX_IDENTITY_LEN)
1490 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1491 SSL_R_DATA_LENGTH_TOO_LONG);
1496 al=SSL_AD_DECODE_ERROR;
1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1498 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1501 /* If received PSK identity hint contains NULL
1502 * characters, the hint is truncated from the first
1503 * NULL. p may not be ending with NULL, so create a
1504 * NULL-terminated string. */
1505 memcpy(tmp_id_hint, p, i);
1506 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1507 if (s->ctx->psk_identity_hint != NULL)
1508 OPENSSL_free(s->ctx->psk_identity_hint);
1509 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1510 if (s->ctx->psk_identity_hint == NULL)
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)
1528 al=SSL_AD_DECODE_ERROR;
1529 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1532 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1534 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1543 al=SSL_AD_DECODE_ERROR;
1544 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1547 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1549 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1554 i = (unsigned int)(p[0]);
1559 al=SSL_AD_DECODE_ERROR;
1560 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1563 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1565 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1574 al=SSL_AD_DECODE_ERROR;
1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1578 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1580 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1586 /* We must check if there is a certificate */
1587 #ifndef OPENSSL_NO_RSA
1588 if (alg_a & SSL_aRSA)
1589 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1594 #ifndef OPENSSL_NO_DSA
1595 else if (alg_a & SSL_aDSS)
1596 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1600 #endif /* !OPENSSL_NO_SRP */
1601 #ifndef OPENSSL_NO_RSA
1602 if (alg_k & SSL_kRSA)
1604 if ((rsa=RSA_new()) == NULL)
1606 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1613 al=SSL_AD_DECODE_ERROR;
1614 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1617 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1619 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1628 al=SSL_AD_DECODE_ERROR;
1629 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1632 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1634 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1640 /* this should be because we are using an export cipher */
1641 if (alg_a & SSL_aRSA)
1642 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1645 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1648 s->session->sess_cert->peer_rsa_tmp=rsa;
1651 #else /* OPENSSL_NO_RSA */
1655 #ifndef OPENSSL_NO_DH
1656 else if (alg_k & SSL_kEDH)
1658 if ((dh=DH_new()) == NULL)
1660 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1667 al=SSL_AD_DECODE_ERROR;
1668 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1671 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1673 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1682 al=SSL_AD_DECODE_ERROR;
1683 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1686 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1688 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1697 al=SSL_AD_DECODE_ERROR;
1698 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1701 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1703 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1709 #ifndef OPENSSL_NO_RSA
1710 if (alg_a & SSL_aRSA)
1711 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1716 #ifndef OPENSSL_NO_DSA
1717 else if (alg_a & SSL_aDSS)
1718 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1720 /* else anonymous DH, so no certificate or pkey. */
1722 s->session->sess_cert->peer_dh_tmp=dh;
1725 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1727 al=SSL_AD_ILLEGAL_PARAMETER;
1728 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1731 #endif /* !OPENSSL_NO_DH */
1733 #ifndef OPENSSL_NO_ECDH
1734 else if (alg_k & SSL_kEECDH)
1737 const EC_GROUP *group;
1739 if ((ecdh=EC_KEY_new()) == NULL)
1741 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1745 /* Extract elliptic curve parameters and the
1746 * server's ephemeral ECDH public key.
1747 * Keep accumulating lengths of various components in
1748 * param_len and make sure it never exceeds n.
1751 /* XXX: For now we only support named (not generic) curves
1752 * and the ECParameters in this case is just three bytes.
1755 /* Check curve is one of our prefrences, if not server has
1756 * sent an invalid curve.
1758 if (!tls1_check_curve(s, p, param_len))
1760 al=SSL_AD_DECODE_ERROR;
1761 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1765 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1767 al=SSL_AD_INTERNAL_ERROR;
1768 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1772 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1775 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1778 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1780 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1783 EC_GROUP_free(ngroup);
1785 group = EC_KEY_get0_group(ecdh);
1787 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1788 (EC_GROUP_get_degree(group) > 163))
1790 al=SSL_AD_EXPORT_RESTRICTION;
1791 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1797 /* Next, get the encoded ECPoint */
1798 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1799 ((bn_ctx = BN_CTX_new()) == NULL))
1801 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1805 encoded_pt_len = *p; /* length of encoded point */
1807 param_len += (1 + encoded_pt_len);
1808 if ((param_len > n) ||
1809 (EC_POINT_oct2point(group, srvr_ecpoint,
1810 p, encoded_pt_len, bn_ctx) == 0))
1812 al=SSL_AD_DECODE_ERROR;
1813 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1820 /* The ECC/TLS specification does not mention
1821 * the use of DSA to sign ECParameters in the server
1822 * key exchange message. We do support RSA and ECDSA.
1825 #ifndef OPENSSL_NO_RSA
1826 else if (alg_a & SSL_aRSA)
1827 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1829 #ifndef OPENSSL_NO_ECDSA
1830 else if (alg_a & SSL_aECDSA)
1831 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1833 /* else anonymous ECDH, so no certificate or pkey. */
1834 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1835 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1837 BN_CTX_free(bn_ctx);
1839 EC_POINT_free(srvr_ecpoint);
1840 srvr_ecpoint = NULL;
1844 al=SSL_AD_UNEXPECTED_MESSAGE;
1845 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1848 #endif /* !OPENSSL_NO_ECDH */
1851 /* p points to the next byte, there are 'n' bytes left */
1853 /* if it was signed, check the signature */
1856 if (SSL_USE_SIGALGS(s))
1858 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1863 al = SSL_AD_DECODE_ERROR;
1867 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1877 j=EVP_PKEY_size(pkey);
1879 if ((i != n) || (n > j) || (n <= 0))
1881 /* wrong packet length */
1882 al=SSL_AD_DECODE_ERROR;
1883 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1887 #ifndef OPENSSL_NO_RSA
1888 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1894 for (num=2; num > 0; num--)
1896 EVP_MD_CTX_set_flags(&md_ctx,
1897 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1898 EVP_DigestInit_ex(&md_ctx,(num == 2)
1899 ?s->ctx->md5:s->ctx->sha1, NULL);
1900 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1901 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1902 EVP_DigestUpdate(&md_ctx,param,param_len);
1903 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1907 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1911 al=SSL_AD_DECRYPT_ERROR;
1912 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1918 al=SSL_AD_DECRYPT_ERROR;
1919 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1926 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1927 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1928 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1929 EVP_VerifyUpdate(&md_ctx,param,param_len);
1930 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1933 al=SSL_AD_DECRYPT_ERROR;
1934 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1941 /* aNULL or kPSK do not need public keys */
1942 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1944 /* Might be wrong key type, check it */
1945 if (ssl3_check_cert_and_algorithm(s))
1946 /* Otherwise this shouldn't happen */
1947 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1950 /* still data left over */
1953 al=SSL_AD_DECODE_ERROR;
1954 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1958 EVP_PKEY_free(pkey);
1959 EVP_MD_CTX_cleanup(&md_ctx);
1962 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1964 EVP_PKEY_free(pkey);
1965 #ifndef OPENSSL_NO_RSA
1969 #ifndef OPENSSL_NO_DH
1973 #ifndef OPENSSL_NO_ECDH
1974 BN_CTX_free(bn_ctx);
1975 EC_POINT_free(srvr_ecpoint);
1979 EVP_MD_CTX_cleanup(&md_ctx);
1983 int ssl3_get_certificate_request(SSL *s)
1986 unsigned long n,nc,l;
1987 unsigned int llen, ctype_num,i;
1989 const unsigned char *p,*q;
1991 STACK_OF(X509_NAME) *ca_sk=NULL;
1993 n=s->method->ssl_get_message(s,
1994 SSL3_ST_CR_CERT_REQ_A,
1995 SSL3_ST_CR_CERT_REQ_B,
2000 if (!ok) return((int)n);
2002 s->s3->tmp.cert_req=0;
2004 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2006 s->s3->tmp.reuse_message=1;
2007 /* If we get here we don't need any cached handshake records
2008 * as we wont be doing client auth.
2010 if (s->s3->handshake_buffer)
2012 if (!ssl3_digest_cached_records(s))
2018 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2020 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2021 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2025 /* TLS does not like anon-DH with client cert */
2026 if (s->version > SSL3_VERSION)
2028 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2030 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2031 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2036 p=d=(unsigned char *)s->init_msg;
2038 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2040 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2044 /* get the certificate types */
2046 if (s->cert->ctypes)
2048 OPENSSL_free(s->cert->ctypes);
2049 s->cert->ctypes = NULL;
2051 if (ctype_num > SSL3_CT_NUMBER)
2053 /* If we exceed static buffer copy all to cert structure */
2054 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2055 memcpy(s->cert->ctypes, p, ctype_num);
2056 s->cert->ctype_num = (size_t)ctype_num;
2057 ctype_num=SSL3_CT_NUMBER;
2059 for (i=0; i<ctype_num; i++)
2060 s->s3->tmp.ctype[i]= p[i];
2062 if (SSL_USE_SIGALGS(s))
2065 /* Check we have enough room for signature algorithms and
2066 * following length value.
2068 if ((unsigned long)(p - d + llen + 2) > n)
2070 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2071 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2074 /* Clear certificate digests and validity flags */
2075 for (i = 0; i < SSL_PKEY_NUM; i++)
2077 s->cert->pkeys[i].digest = NULL;
2078 s->cert->pkeys[i].valid_flags = 0;
2080 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2082 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2083 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2089 /* get the CA RDNs */
2094 out=fopen("/tmp/vsign.der","w");
2095 fwrite(p,1,llen,out);
2100 if ((unsigned long)(p - d + llen) != n)
2102 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2103 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2107 for (nc=0; nc<llen; )
2110 if ((l+nc+2) > llen)
2112 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2113 goto cont; /* netscape bugs */
2114 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2115 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2121 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2123 /* If netscape tolerance is on, ignore errors */
2124 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2128 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2129 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2136 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2137 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2140 if (!sk_X509_NAME_push(ca_sk,xn))
2142 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2156 /* we should setup a certificate to return.... */
2157 s->s3->tmp.cert_req=1;
2158 s->s3->tmp.ctype_num=ctype_num;
2159 if (s->s3->tmp.ca_names != NULL)
2160 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2161 s->s3->tmp.ca_names=ca_sk;
2166 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2170 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2172 return(X509_NAME_cmp(*a,*b));
2174 #ifndef OPENSSL_NO_TLSEXT
2175 int ssl3_get_new_session_ticket(SSL *s)
2177 int ok,al,ret=0, ticklen;
2179 const unsigned char *p;
2182 n=s->method->ssl_get_message(s,
2183 SSL3_ST_CR_SESSION_TICKET_A,
2184 SSL3_ST_CR_SESSION_TICKET_B,
2192 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2194 s->s3->tmp.reuse_message=1;
2197 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2199 al=SSL_AD_UNEXPECTED_MESSAGE;
2200 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2205 /* need at least ticket_lifetime_hint + ticket length */
2206 al = SSL_AD_DECODE_ERROR;
2207 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2211 p=d=(unsigned char *)s->init_msg;
2212 n2l(p, s->session->tlsext_tick_lifetime_hint);
2214 /* ticket_lifetime_hint + ticket_length + ticket */
2215 if (ticklen + 6 != n)
2217 al = SSL_AD_DECODE_ERROR;
2218 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2221 if (s->session->tlsext_tick)
2223 OPENSSL_free(s->session->tlsext_tick);
2224 s->session->tlsext_ticklen = 0;
2226 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2227 if (!s->session->tlsext_tick)
2229 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2232 memcpy(s->session->tlsext_tick, p, ticklen);
2233 s->session->tlsext_ticklen = ticklen;
2234 /* There are two ways to detect a resumed ticket sesion.
2235 * One is to set an appropriate session ID and then the server
2236 * must return a match in ServerHello. This allows the normal
2237 * client session ID matching to work and we know much
2238 * earlier that the ticket has been accepted.
2240 * The other way is to set zero length session ID when the
2241 * ticket is presented and rely on the handshake to determine
2242 * session resumption.
2244 * We choose the former approach because this fits in with
2245 * assumptions elsewhere in OpenSSL. The session ID is set
2246 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2249 EVP_Digest(p, ticklen,
2250 s->session->session_id, &s->session->session_id_length,
2251 #ifndef OPENSSL_NO_SHA256
2252 EVP_sha256(), NULL);
2259 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2264 int ssl3_get_cert_status(SSL *s)
2267 unsigned long resplen,n;
2268 const unsigned char *p;
2270 n=s->method->ssl_get_message(s,
2271 SSL3_ST_CR_CERT_STATUS_A,
2272 SSL3_ST_CR_CERT_STATUS_B,
2273 SSL3_MT_CERTIFICATE_STATUS,
2277 if (!ok) return((int)n);
2280 /* need at least status type + length */
2281 al = SSL_AD_DECODE_ERROR;
2282 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2285 p = (unsigned char *)s->init_msg;
2286 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2288 al = SSL_AD_DECODE_ERROR;
2289 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2293 if (resplen + 4 != n)
2295 al = SSL_AD_DECODE_ERROR;
2296 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2299 if (s->tlsext_ocsp_resp)
2300 OPENSSL_free(s->tlsext_ocsp_resp);
2301 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2302 if (!s->tlsext_ocsp_resp)
2304 al = SSL_AD_INTERNAL_ERROR;
2305 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2308 s->tlsext_ocsp_resplen = resplen;
2309 if (s->ctx->tlsext_status_cb)
2312 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2315 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2316 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2321 al = SSL_AD_INTERNAL_ERROR;
2322 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2328 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2333 int ssl3_get_server_done(SSL *s)
2338 n=s->method->ssl_get_message(s,
2339 SSL3_ST_CR_SRVR_DONE_A,
2340 SSL3_ST_CR_SRVR_DONE_B,
2341 SSL3_MT_SERVER_DONE,
2342 30, /* should be very small, like 0 :-) */
2345 if (!ok) return((int)n);
2348 /* should contain no data */
2349 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2350 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2358 int ssl3_send_client_key_exchange(SSL *s)
2362 unsigned long alg_k;
2363 #ifndef OPENSSL_NO_RSA
2365 EVP_PKEY *pkey=NULL;
2367 #ifndef OPENSSL_NO_KRB5
2369 #endif /* OPENSSL_NO_KRB5 */
2370 #ifndef OPENSSL_NO_ECDH
2371 EC_KEY *clnt_ecdh = NULL;
2372 const EC_POINT *srvr_ecpoint = NULL;
2373 EVP_PKEY *srvr_pub_pkey = NULL;
2374 unsigned char *encodedPoint = NULL;
2375 int encoded_pt_len = 0;
2376 BN_CTX * bn_ctx = NULL;
2379 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2381 p = ssl_handshake_start(s);
2383 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2385 /* Fool emacs indentation */
2387 #ifndef OPENSSL_NO_RSA
2388 else if (alg_k & SSL_kRSA)
2391 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2393 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2394 rsa=s->session->sess_cert->peer_rsa_tmp;
2397 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2398 if ((pkey == NULL) ||
2399 (pkey->type != EVP_PKEY_RSA) ||
2400 (pkey->pkey.rsa == NULL))
2402 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2406 EVP_PKEY_free(pkey);
2409 tmp_buf[0]=s->client_version>>8;
2410 tmp_buf[1]=s->client_version&0xff;
2411 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2414 s->session->master_key_length=sizeof tmp_buf;
2417 /* Fix buf for TLS and beyond */
2418 if (s->version > SSL3_VERSION)
2420 n=RSA_public_encrypt(sizeof tmp_buf,
2421 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2423 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2424 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2428 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2432 /* Fix buf for TLS and beyond */
2433 if (s->version > SSL3_VERSION)
2439 s->session->master_key_length=
2440 s->method->ssl3_enc->generate_master_secret(s,
2441 s->session->master_key,
2442 tmp_buf,sizeof tmp_buf);
2443 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2446 #ifndef OPENSSL_NO_KRB5
2447 else if (alg_k & SSL_kKRB5)
2449 krb5_error_code krb5rc;
2450 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2451 /* krb5_data krb5_ap_req; */
2452 krb5_data *enc_ticket;
2453 krb5_data authenticator, *authp = NULL;
2454 EVP_CIPHER_CTX ciph_ctx;
2455 const EVP_CIPHER *enc = NULL;
2456 unsigned char iv[EVP_MAX_IV_LENGTH];
2457 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2458 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2459 + EVP_MAX_IV_LENGTH];
2460 int padl, outl = sizeof(epms);
2462 EVP_CIPHER_CTX_init(&ciph_ctx);
2465 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2467 #endif /* KSSL_DEBUG */
2471 if (KRB5SENDAUTH) authp = &authenticator;
2472 #endif /* KRB5SENDAUTH */
2474 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2476 enc = kssl_map_enc(kssl_ctx->enctype);
2481 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2482 if (krb5rc && kssl_err.text)
2483 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2485 #endif /* KSSL_DEBUG */
2489 ssl3_send_alert(s,SSL3_AL_FATAL,
2490 SSL_AD_HANDSHAKE_FAILURE);
2491 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2496 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2497 ** in place of RFC 2712 KerberosWrapper, as in:
2499 ** Send ticket (copy to *p, set n = length)
2500 ** n = krb5_ap_req.length;
2501 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2502 ** if (krb5_ap_req.data)
2503 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2505 ** Now using real RFC 2712 KerberosWrapper
2506 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2507 ** Note: 2712 "opaque" types are here replaced
2508 ** with a 2-byte length followed by the value.
2510 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2511 ** Where "xx xx" = length bytes. Shown here with
2512 ** optional authenticator omitted.
2515 /* KerberosWrapper.Ticket */
2516 s2n(enc_ticket->length,p);
2517 memcpy(p, enc_ticket->data, enc_ticket->length);
2518 p+= enc_ticket->length;
2519 n = enc_ticket->length + 2;
2521 /* KerberosWrapper.Authenticator */
2522 if (authp && authp->length)
2524 s2n(authp->length,p);
2525 memcpy(p, authp->data, authp->length);
2527 n+= authp->length + 2;
2535 s2n(0,p);/* null authenticator length */
2539 tmp_buf[0]=s->client_version>>8;
2540 tmp_buf[1]=s->client_version&0xff;
2541 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2544 /* 20010420 VRS. Tried it this way; failed.
2545 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2546 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2547 ** kssl_ctx->length);
2548 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2551 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2552 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2554 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2556 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2558 if (outl > (int)sizeof epms)
2560 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2563 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2565 /* KerberosWrapper.EncryptedPreMasterSecret */
2567 memcpy(p, epms, outl);
2571 s->session->master_key_length=
2572 s->method->ssl3_enc->generate_master_secret(s,
2573 s->session->master_key,
2574 tmp_buf, sizeof tmp_buf);
2576 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2577 OPENSSL_cleanse(epms, outl);
2580 #ifndef OPENSSL_NO_DH
2581 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2583 DH *dh_srvr,*dh_clnt;
2584 SESS_CERT *scert = s->session->sess_cert;
2588 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2589 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2593 if (scert->peer_dh_tmp != NULL)
2594 dh_srvr=scert->peer_dh_tmp;
2597 /* we get them from the cert */
2598 int idx = scert->peer_cert_type;
2599 EVP_PKEY *spkey = NULL;
2602 spkey = X509_get_pubkey(
2603 scert->peer_pkeys[idx].x509);
2606 dh_srvr = EVP_PKEY_get1_DH(spkey);
2607 EVP_PKEY_free(spkey);
2609 if (dh_srvr == NULL)
2611 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2612 ERR_R_INTERNAL_ERROR);
2616 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2618 /* Use client certificate key */
2619 EVP_PKEY *clkey = s->cert->key->privatekey;
2622 dh_clnt = EVP_PKEY_get1_DH(clkey);
2623 if (dh_clnt == NULL)
2625 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2626 ERR_R_INTERNAL_ERROR);
2632 /* generate a new random key */
2633 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2635 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2638 if (!DH_generate_key(dh_clnt))
2640 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2646 /* use the 'p' output buffer for the DH key, but
2647 * make sure to clear it out afterwards */
2649 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2650 if (scert->peer_dh_tmp == NULL)
2655 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2660 /* generate master key from the result */
2661 s->session->master_key_length=
2662 s->method->ssl3_enc->generate_master_secret(s,
2663 s->session->master_key,p,n);
2667 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2671 /* send off the data */
2672 n=BN_num_bytes(dh_clnt->pub_key);
2674 BN_bn2bin(dh_clnt->pub_key,p);
2680 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2684 #ifndef OPENSSL_NO_ECDH
2685 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2687 const EC_GROUP *srvr_group = NULL;
2689 int ecdh_clnt_cert = 0;
2692 /* Did we send out the client's
2693 * ECDH share for use in premaster
2694 * computation as part of client certificate?
2695 * If so, set ecdh_clnt_cert to 1.
2697 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2699 /* XXX: For now, we do not support client
2700 * authentication using ECDH certificates.
2701 * To add such support, one needs to add
2702 * code that checks for appropriate
2703 * conditions and sets ecdh_clnt_cert to 1.
2704 * For example, the cert have an ECC
2705 * key on the same curve as the server's
2706 * and the key should be authorized for
2709 * One also needs to add code in ssl3_connect
2710 * to skip sending the certificate verify
2713 * if ((s->cert->key->privatekey != NULL) &&
2714 * (s->cert->key->privatekey->type ==
2715 * EVP_PKEY_EC) && ...)
2716 * ecdh_clnt_cert = 1;
2720 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2722 tkey = s->session->sess_cert->peer_ecdh_tmp;
2726 /* Get the Server Public Key from Cert */
2727 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2728 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2729 if ((srvr_pub_pkey == NULL) ||
2730 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2731 (srvr_pub_pkey->pkey.ec == NULL))
2733 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2734 ERR_R_INTERNAL_ERROR);
2738 tkey = srvr_pub_pkey->pkey.ec;
2741 srvr_group = EC_KEY_get0_group(tkey);
2742 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2744 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2746 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2747 ERR_R_INTERNAL_ERROR);
2751 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2753 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2757 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2759 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2764 /* Reuse key info from our certificate
2765 * We only need our private key to perform
2766 * the ECDH computation.
2768 const BIGNUM *priv_key;
2769 tkey = s->cert->key->privatekey->pkey.ec;
2770 priv_key = EC_KEY_get0_private_key(tkey);
2771 if (priv_key == NULL)
2773 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2776 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2778 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2784 /* Generate a new ECDH key pair */
2785 if (!(EC_KEY_generate_key(clnt_ecdh)))
2787 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2792 /* use the 'p' output buffer for the ECDH key, but
2793 * make sure to clear it out afterwards
2796 field_size = EC_GROUP_get_degree(srvr_group);
2797 if (field_size <= 0)
2799 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2803 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2806 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2811 /* generate master key from the result */
2812 s->session->master_key_length = s->method->ssl3_enc \
2813 -> generate_master_secret(s,
2814 s->session->master_key,
2817 memset(p, 0, n); /* clean up */
2821 /* Send empty client key exch message */
2826 /* First check the size of encoding and
2827 * allocate memory accordingly.
2830 EC_POINT_point2oct(srvr_group,
2831 EC_KEY_get0_public_key(clnt_ecdh),
2832 POINT_CONVERSION_UNCOMPRESSED,
2835 encodedPoint = (unsigned char *)
2836 OPENSSL_malloc(encoded_pt_len *
2837 sizeof(unsigned char));
2838 bn_ctx = BN_CTX_new();
2839 if ((encodedPoint == NULL) ||
2842 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2846 /* Encode the public key */
2847 n = EC_POINT_point2oct(srvr_group,
2848 EC_KEY_get0_public_key(clnt_ecdh),
2849 POINT_CONVERSION_UNCOMPRESSED,
2850 encodedPoint, encoded_pt_len, bn_ctx);
2852 *p = n; /* length of encoded point */
2853 /* Encoded point will be copied here */
2855 /* copy the point */
2856 memcpy((unsigned char *)p, encodedPoint, n);
2857 /* increment n to account for length field */
2861 /* Free allocated memory */
2862 BN_CTX_free(bn_ctx);
2863 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2864 if (clnt_ecdh != NULL)
2865 EC_KEY_free(clnt_ecdh);
2866 EVP_PKEY_free(srvr_pub_pkey);
2868 #endif /* !OPENSSL_NO_ECDH */
2869 else if (alg_k & SSL_kGOST)
2871 /* GOST key exchange message creation */
2872 EVP_PKEY_CTX *pkey_ctx;
2875 unsigned int md_len;
2877 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2878 EVP_MD_CTX *ukm_hash;
2881 /* Get server sertificate PKEY and create ctx from it */
2882 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2884 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2886 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2890 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2891 /* If we have send a certificate, and certificate key
2893 * parameters match those of server certificate, use
2894 * certificate key for key exchange
2897 /* Otherwise, generate ephemeral key pair */
2899 EVP_PKEY_encrypt_init(pkey_ctx);
2900 /* Generate session key */
2901 RAND_bytes(premaster_secret,32);
2902 /* If we have client certificate, use its secret as peer key */
2903 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2904 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2905 /* If there was an error - just ignore it. Ephemeral key
2911 /* Compute shared IV and store it in algorithm-specific
2913 ukm_hash = EVP_MD_CTX_create();
2914 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2915 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2916 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2917 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2918 EVP_MD_CTX_destroy(ukm_hash);
2919 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2921 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2925 /* Make GOST keytransport blob message */
2926 /*Encapsulate it into sequence */
2927 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2929 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2930 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2937 *(p++)= msglen & 0xff;
2942 *(p++)= msglen & 0xff;
2945 memcpy(p, tmp, msglen);
2946 /* Check if pubkey from client certificate was used */
2947 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2949 /* Set flag "skip certificate verify" */
2950 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2952 EVP_PKEY_CTX_free(pkey_ctx);
2953 s->session->master_key_length=
2954 s->method->ssl3_enc->generate_master_secret(s,
2955 s->session->master_key,premaster_secret,32);
2956 EVP_PKEY_free(pub_key);
2959 #ifndef OPENSSL_NO_SRP
2960 else if (alg_k & SSL_kSRP)
2962 if (s->srp_ctx.A != NULL)
2964 /* send off the data */
2965 n=BN_num_bytes(s->srp_ctx.A);
2967 BN_bn2bin(s->srp_ctx.A,p);
2972 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2975 if (s->session->srp_username != NULL)
2976 OPENSSL_free(s->session->srp_username);
2977 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2978 if (s->session->srp_username == NULL)
2980 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2981 ERR_R_MALLOC_FAILURE);
2985 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2987 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2992 #ifndef OPENSSL_NO_PSK
2993 else if (alg_k & SSL_kPSK)
2995 char identity[PSK_MAX_IDENTITY_LEN];
2996 unsigned char *t = NULL;
2997 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2998 unsigned int pre_ms_len = 0, psk_len = 0;
3002 if (s->psk_client_callback == NULL)
3004 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3005 SSL_R_PSK_NO_CLIENT_CB);
3009 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3010 identity, PSK_MAX_IDENTITY_LEN,
3011 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3012 if (psk_len > PSK_MAX_PSK_LEN)
3014 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3015 ERR_R_INTERNAL_ERROR);
3018 else if (psk_len == 0)
3020 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3021 SSL_R_PSK_IDENTITY_NOT_FOUND);
3025 /* create PSK pre_master_secret */
3026 pre_ms_len = 2+psk_len+2+psk_len;
3028 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3030 memset(t, 0, psk_len);
3034 if (s->session->psk_identity_hint != NULL)
3035 OPENSSL_free(s->session->psk_identity_hint);
3036 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3037 if (s->ctx->psk_identity_hint != NULL &&
3038 s->session->psk_identity_hint == NULL)
3040 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3041 ERR_R_MALLOC_FAILURE);
3045 if (s->session->psk_identity != NULL)
3046 OPENSSL_free(s->session->psk_identity);
3047 s->session->psk_identity = BUF_strdup(identity);
3048 if (s->session->psk_identity == NULL)
3050 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3051 ERR_R_MALLOC_FAILURE);
3055 s->session->master_key_length =
3056 s->method->ssl3_enc->generate_master_secret(s,
3057 s->session->master_key,
3058 psk_or_pre_ms, pre_ms_len);
3059 n = strlen(identity);
3061 memcpy(p, identity, n);
3065 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
3066 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3069 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3076 ssl3_send_alert(s, SSL3_AL_FATAL,
3077 SSL_AD_HANDSHAKE_FAILURE);
3078 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3079 ERR_R_INTERNAL_ERROR);
3083 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3084 s->state=SSL3_ST_CW_KEY_EXCH_B;
3087 /* SSL3_ST_CW_KEY_EXCH_B */
3088 return ssl_do_write(s);
3090 #ifndef OPENSSL_NO_ECDH
3091 BN_CTX_free(bn_ctx);
3092 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3093 if (clnt_ecdh != NULL)
3094 EC_KEY_free(clnt_ecdh);
3095 EVP_PKEY_free(srvr_pub_pkey);
3100 int ssl3_send_client_verify(SSL *s)
3103 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3105 EVP_PKEY_CTX *pctx=NULL;
3111 EVP_MD_CTX_init(&mctx);
3113 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3115 p= ssl_handshake_start(s);
3116 pkey=s->cert->key->privatekey;
3117 /* Create context from key and test if sha1 is allowed as digest */
3118 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3119 EVP_PKEY_sign_init(pctx);
3120 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3122 if (!SSL_USE_SIGALGS(s))
3123 s->method->ssl3_enc->cert_verify_mac(s,
3125 &(data[MD5_DIGEST_LENGTH]));
3131 /* For TLS v1.2 send signature algorithm and signature
3132 * using agreed digest and cached handshake records.
3134 if (SSL_USE_SIGALGS(s))
3138 const EVP_MD *md = s->cert->key->digest;
3139 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3141 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3143 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3144 ERR_R_INTERNAL_ERROR);
3149 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3152 if (!EVP_SignInit_ex(&mctx, md, NULL)
3153 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3154 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3156 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3162 if (!ssl3_digest_cached_records(s))
3166 #ifndef OPENSSL_NO_RSA
3167 if (pkey->type == EVP_PKEY_RSA)
3169 s->method->ssl3_enc->cert_verify_mac(s,
3172 if (RSA_sign(NID_md5_sha1, data,
3173 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3174 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3176 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3184 #ifndef OPENSSL_NO_DSA
3185 if (pkey->type == EVP_PKEY_DSA)
3187 if (!DSA_sign(pkey->save_type,
3188 &(data[MD5_DIGEST_LENGTH]),
3189 SHA_DIGEST_LENGTH,&(p[2]),
3190 (unsigned int *)&j,pkey->pkey.dsa))
3192 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3200 #ifndef OPENSSL_NO_ECDSA
3201 if (pkey->type == EVP_PKEY_EC)
3203 if (!ECDSA_sign(pkey->save_type,
3204 &(data[MD5_DIGEST_LENGTH]),
3205 SHA_DIGEST_LENGTH,&(p[2]),
3206 (unsigned int *)&j,pkey->pkey.ec))
3208 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3217 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3219 unsigned char signbuf[64];
3222 s->method->ssl3_enc->cert_verify_mac(s,
3223 NID_id_GostR3411_94,
3225 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3226 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3227 ERR_R_INTERNAL_ERROR);
3230 for (i=63,j=0; i>=0; j++, i--) {
3238 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3241 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3242 s->state=SSL3_ST_CW_CERT_VRFY_B;
3244 EVP_MD_CTX_cleanup(&mctx);
3245 EVP_PKEY_CTX_free(pctx);
3246 return ssl_do_write(s);
3248 EVP_MD_CTX_cleanup(&mctx);
3249 EVP_PKEY_CTX_free(pctx);
3253 /* Check a certificate can be used for client authentication. Currently
3254 * check cert exists, if we have a suitable digest for TLS 1.2 if
3255 * static DH client certificates can be used and optionally checks
3256 * suitability for Suite B.
3258 static int ssl3_check_client_certificate(SSL *s)
3260 unsigned long alg_k;
3261 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3263 /* If no suitable signature algorithm can't use certificate */
3264 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3266 /* If strict mode check suitability of chain before using it.
3267 * This also adjusts suite B digest if necessary.
3269 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3270 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3272 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3273 /* See if we can use client certificate for fixed DH */
3274 if (alg_k & (SSL_kDHr|SSL_kDHd))
3276 SESS_CERT *scert = s->session->sess_cert;
3277 int i = scert->peer_cert_type;
3278 EVP_PKEY *clkey = NULL, *spkey = NULL;
3279 clkey = s->cert->key->privatekey;
3280 /* If client key not DH assume it can be used */
3281 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3284 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3287 /* Compare server and client parameters */
3288 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3289 EVP_PKEY_free(spkey);
3293 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3298 int ssl3_send_client_certificate(SSL *s)
3301 EVP_PKEY *pkey=NULL;
3304 if (s->state == SSL3_ST_CW_CERT_A)
3306 /* Let cert callback update client certificates if required */
3307 if (s->cert->cert_cb)
3309 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3312 s->rwstate=SSL_X509_LOOKUP;
3317 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3320 s->rwstate=SSL_NOTHING;
3322 if (ssl3_check_client_certificate(s))
3323 s->state=SSL3_ST_CW_CERT_C;
3325 s->state=SSL3_ST_CW_CERT_B;
3328 /* We need to get a client cert */
3329 if (s->state == SSL3_ST_CW_CERT_B)
3331 /* If we get an error, we need to
3332 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3333 * We then get retied later */
3335 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3338 s->rwstate=SSL_X509_LOOKUP;
3341 s->rwstate=SSL_NOTHING;
3342 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3344 s->state=SSL3_ST_CW_CERT_B;
3345 if ( !SSL_use_certificate(s,x509) ||
3346 !SSL_use_PrivateKey(s,pkey))
3352 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3355 if (x509 != NULL) X509_free(x509);
3356 if (pkey != NULL) EVP_PKEY_free(pkey);
3357 if (i && !ssl3_check_client_certificate(s))
3361 if (s->version == SSL3_VERSION)
3363 s->s3->tmp.cert_req=0;
3364 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3369 s->s3->tmp.cert_req=2;
3373 /* Ok, we have a cert */
3374 s->state=SSL3_ST_CW_CERT_C;
3377 if (s->state == SSL3_ST_CW_CERT_C)
3379 s->state=SSL3_ST_CW_CERT_D;
3380 ssl3_output_cert_chain(s,
3381 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3383 /* SSL3_ST_CW_CERT_D */
3384 return ssl_do_write(s);
3387 #define has_bits(i,m) (((i)&(m)) == (m))
3389 int ssl3_check_cert_and_algorithm(SSL *s)
3393 EVP_PKEY *pkey=NULL;
3395 #ifndef OPENSSL_NO_RSA
3398 #ifndef OPENSSL_NO_DH
3402 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3403 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3405 /* we don't have a certificate */
3406 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3409 sc=s->session->sess_cert;
3412 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3416 #ifndef OPENSSL_NO_RSA
3417 rsa=s->session->sess_cert->peer_rsa_tmp;
3419 #ifndef OPENSSL_NO_DH
3420 dh=s->session->sess_cert->peer_dh_tmp;
3423 /* This is the passed certificate */
3425 idx=sc->peer_cert_type;
3426 #ifndef OPENSSL_NO_ECDH
3427 if (idx == SSL_PKEY_ECC)
3429 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3431 { /* check failed */
3432 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3440 else if (alg_a & SSL_aECDSA)
3442 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3445 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3447 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3451 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3452 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3453 EVP_PKEY_free(pkey);
3456 /* Check that we have a certificate if we require one */
3457 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3459 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3462 #ifndef OPENSSL_NO_DSA
3463 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3465 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3469 #ifndef OPENSSL_NO_RSA
3470 if ((alg_k & SSL_kRSA) &&
3471 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3473 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3477 #ifndef OPENSSL_NO_DH
3478 if ((alg_k & SSL_kEDH) &&
3479 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3481 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3484 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3485 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3487 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3490 #ifndef OPENSSL_NO_DSA
3491 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3492 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3494 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3500 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3502 #ifndef OPENSSL_NO_RSA
3503 if (alg_k & SSL_kRSA)
3506 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3508 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3514 #ifndef OPENSSL_NO_DH
3515 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3518 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3520 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3527 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3533 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3538 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3539 int ssl3_send_next_proto(SSL *s)
3541 unsigned int len, padding_len;
3544 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3546 len = s->next_proto_negotiated_len;
3547 padding_len = 32 - ((len + 2) % 32);
3548 d = (unsigned char *)s->init_buf->data;
3550 memcpy(d + 5, s->next_proto_negotiated, len);
3551 d[5 + len] = padding_len;
3552 memset(d + 6 + len, 0, padding_len);
3553 *(d++)=SSL3_MT_NEXT_PROTO;
3554 l2n3(2 + len + padding_len, d);
3555 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3556 s->init_num = 4 + 2 + len + padding_len;
3560 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3562 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3564 /* Check to see if handshake is full or resumed. Usually this is just a
3565 * case of checking to see if a cache hit has occurred. In the case of
3566 * session tickets we have to check the next message to be sure.
3569 #ifndef OPENSSL_NO_TLSEXT
3570 int ssl3_check_finished(SSL *s)
3574 /* Read the message to see if it is supplemental data, regardless if there is a session ticket
3575 this function is called when we really expect a Certificate
3576 message, so permit appropriate message length */
3577 n=s->method->ssl_get_message(s,
3583 if (!ok) return((int)n);
3584 s->s3->tmp.reuse_message = 1;
3586 if (s->s3->tmp.message_type == SSL3_MT_SUPPLEMENTAL_DATA)
3590 /* If we have no ticket it cannot be a resumed session. */
3591 if (!s->session->tlsext_tick)
3593 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3594 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3601 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3604 #ifndef OPENSSL_NO_ENGINE
3605 if (s->ctx->client_cert_engine)
3607 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3608 SSL_get_client_CA_list(s),
3609 px509, ppkey, NULL, NULL, NULL);
3614 if (s->ctx->client_cert_cb)
3615 i = s->ctx->client_cert_cb(s,px509,ppkey);
3619 #ifndef OPENSSL_NO_TLSEXT
3620 int tls1_send_client_supplemental_data(SSL *s, int *skip)
3623 if (s->ctx->cli_supp_data_records_count)
3625 unsigned char *p = NULL;
3626 unsigned char *size_loc = NULL;
3627 cli_supp_data_record *record = NULL;
3631 for (i = 0; i < s->ctx->cli_supp_data_records_count; i++)
3633 const unsigned char *out = NULL;
3634 unsigned short outlen = 0;
3636 record = &s->ctx->cli_supp_data_records[i];
3638 /* NULL callback or -1 omits supp data entry*/
3641 cb_retval = record->fn2(s, record->supp_data_type,
3644 if (cb_retval == -1)
3645 continue; /* skip this supp data entry */
3648 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3651 if (outlen == 0 || TLSEXT_MAXLEN_supplemental_data < outlen + 4 + length)
3653 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3656 /* if first entry, write handshake message type */
3659 if (!BUF_MEM_grow_clean(s->init_buf, 4))
3661 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3664 p = (unsigned char *)s->init_buf->data;
3665 *(p++) = SSL3_MT_SUPPLEMENTAL_DATA;
3666 /* update message length when all
3667 * callbacks complete */
3669 /* skip over handshake length field (3
3670 * bytes) and supp_data length field
3675 if (!BUF_MEM_grow(s->init_buf, outlen + 4))
3677 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3680 s2n(record->supp_data_type, p);
3682 memcpy(p, out, outlen);
3683 length += (outlen + 4);
3688 //write handshake length
3689 l2n3(length - 4, size_loc);
3691 l2n3(length - 7, size_loc);
3692 s->state = SSL3_ST_CW_SUPPLEMENTAL_DATA_B;
3693 s->init_num = length;
3695 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3699 //no supp data message sent
3706 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3710 int tls1_get_server_supplemental_data(SSL *s)
3715 const unsigned char *p, *d;
3716 unsigned short supp_data_entry_type = 0;
3717 unsigned long supp_data_entry_len = 0;
3718 unsigned long supp_data_len = 0;
3722 n=s->method->ssl_get_message(s,
3723 SSL3_ST_CR_SUPPLEMENTAL_DATA_A,
3724 SSL3_ST_CR_SUPPLEMENTAL_DATA_B,
3725 SSL3_MT_SUPPLEMENTAL_DATA,
3726 /* use default limit */
3727 TLSEXT_MAXLEN_supplemental_data,
3730 if (!ok) return((int)n);
3732 p = (unsigned char *)s->init_msg;
3734 /* The message cannot be empty */
3737 al = SSL_AD_DECODE_ERROR;
3738 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3741 n2l3(p, supp_data_len);
3742 while (p<d+supp_data_len)
3744 n2s(p, supp_data_entry_type);
3745 n2s(p, supp_data_entry_len);
3746 //if there is a callback for this supp data type, send it
3747 for (i=0; i < s->ctx->cli_supp_data_records_count; i++)
3749 if (s->ctx->cli_supp_data_records[i].supp_data_type == supp_data_entry_type &&
3750 s->ctx->cli_supp_data_records[i].fn1)
3752 cb_retval = s->ctx->cli_supp_data_records[i].fn1(s, supp_data_entry_type, p,
3753 supp_data_entry_len, &al, s->ctx->cli_supp_data_records[i].arg);
3756 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA, ERR_R_SSL_LIB);
3761 p+=supp_data_entry_len;
3765 ssl3_send_alert(s,SSL3_AL_FATAL,al);