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 /* Set version disabled mask now we know version */
1075 if (!SSL_USE_TLS1_2_CIPHERS(s))
1076 ct->mask_ssl = SSL_TLSV1_2;
1079 /* If it is a disabled cipher we didn't send it in client hello,
1080 * so return an error.
1082 if (c->algorithm_ssl & ct->mask_ssl ||
1083 c->algorithm_mkey & ct->mask_k ||
1084 c->algorithm_auth & ct->mask_a)
1086 al=SSL_AD_ILLEGAL_PARAMETER;
1087 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1090 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1092 sk=ssl_get_ciphers_by_id(s);
1093 i=sk_SSL_CIPHER_find(sk,c);
1096 /* we did not say we would use this cipher */
1097 al=SSL_AD_ILLEGAL_PARAMETER;
1098 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1102 /* Depending on the session caching (internal/external), the cipher
1103 and/or cipher_id values may not be set. Make sure that
1104 cipher_id is set and use it for comparison. */
1105 if (s->session->cipher)
1106 s->session->cipher_id = s->session->cipher->id;
1107 if (s->hit && (s->session->cipher_id != c->id))
1109 /* Workaround is now obsolete */
1112 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1115 al=SSL_AD_ILLEGAL_PARAMETER;
1116 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1120 s->s3->tmp.new_cipher=c;
1121 /* Don't digest cached records if no sigalgs: we may need them for
1122 * client authentication.
1124 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1126 /* lets get the compression algorithm */
1128 #ifdef OPENSSL_NO_COMP
1131 al=SSL_AD_ILLEGAL_PARAMETER;
1132 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1135 /* If compression is disabled we'd better not try to resume a session
1136 * using compression.
1138 if (s->session->compress_meth != 0)
1140 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1145 if (s->hit && j != s->session->compress_meth)
1147 al=SSL_AD_ILLEGAL_PARAMETER;
1148 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1153 else if (s->options & SSL_OP_NO_COMPRESSION)
1155 al=SSL_AD_ILLEGAL_PARAMETER;
1156 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1160 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1162 if ((j != 0) && (comp == NULL))
1164 al=SSL_AD_ILLEGAL_PARAMETER;
1165 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1170 s->s3->tmp.new_compression=comp;
1174 #ifndef OPENSSL_NO_TLSEXT
1176 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1178 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1185 /* wrong packet length */
1186 al=SSL_AD_DECODE_ERROR;
1187 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1193 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1198 int ssl3_get_server_certificate(SSL *s)
1200 int al,i,ok,ret= -1;
1201 unsigned long n,nc,llen,l;
1203 const unsigned char *q,*p;
1205 STACK_OF(X509) *sk=NULL;
1207 EVP_PKEY *pkey=NULL;
1208 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1210 n=s->method->ssl_get_message(s,
1217 if (!ok) return((int)n);
1219 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1220 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1221 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1223 s->s3->tmp.reuse_message=1;
1227 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1229 al=SSL_AD_UNEXPECTED_MESSAGE;
1230 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1233 p=d=(unsigned char *)s->init_msg;
1235 if ((sk=sk_X509_new_null()) == NULL)
1237 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1244 al=SSL_AD_DECODE_ERROR;
1245 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1248 for (nc=0; nc<llen; )
1251 if ((l+nc+3) > llen)
1253 al=SSL_AD_DECODE_ERROR;
1254 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1259 x=d2i_X509(NULL,&q,l);
1262 al=SSL_AD_BAD_CERTIFICATE;
1263 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1268 al=SSL_AD_DECODE_ERROR;
1269 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1272 if (!sk_X509_push(sk,x))
1274 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1282 i=ssl_verify_cert_chain(s,sk);
1283 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1284 #ifndef OPENSSL_NO_KRB5
1285 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1286 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1287 #endif /* OPENSSL_NO_KRB5 */
1290 al=ssl_verify_alarm_type(s->verify_result);
1291 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1294 ERR_clear_error(); /* but we keep s->verify_result */
1296 sc=ssl_sess_cert_new();
1297 if (sc == NULL) goto err;
1299 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1300 s->session->sess_cert=sc;
1303 /* Inconsistency alert: cert_chain does include the peer's
1304 * certificate, which we don't include in s3_srvr.c */
1305 x=sk_X509_value(sk,0);
1307 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1309 pkey=X509_get_pubkey(x);
1311 /* VRS: allow null cert if auth == KRB5 */
1312 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1313 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1317 printf("pkey,x = %p, %p\n", pkey,x);
1318 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1319 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1320 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1321 #endif /* KSSL_DEBUG */
1323 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1327 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1328 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1332 i=ssl_cert_type(x,pkey);
1333 if (need_cert && i < 0)
1337 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1338 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1344 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1345 if (exp_idx >= 0 && i != exp_idx)
1348 al=SSL_AD_ILLEGAL_PARAMETER;
1349 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1350 SSL_R_WRONG_CERTIFICATE_TYPE);
1353 sc->peer_cert_type=i;
1354 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1355 /* Why would the following ever happen?
1356 * We just created sc a couple of lines ago. */
1357 if (sc->peer_pkeys[i].x509 != NULL)
1358 X509_free(sc->peer_pkeys[i].x509);
1359 sc->peer_pkeys[i].x509=x;
1360 sc->peer_key= &(sc->peer_pkeys[i]);
1362 if (s->session->peer != NULL)
1363 X509_free(s->session->peer);
1364 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1369 sc->peer_cert_type=i;
1372 if (s->session->peer != NULL)
1373 X509_free(s->session->peer);
1374 s->session->peer=NULL;
1376 s->session->verify_result = s->verify_result;
1383 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1386 EVP_PKEY_free(pkey);
1388 sk_X509_pop_free(sk,X509_free);
1392 int ssl3_get_key_exchange(SSL *s)
1394 #ifndef OPENSSL_NO_RSA
1395 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1398 unsigned char *param,*p;
1399 int al,i,j,param_len,ok;
1401 EVP_PKEY *pkey=NULL;
1402 const EVP_MD *md = NULL;
1403 #ifndef OPENSSL_NO_RSA
1406 #ifndef OPENSSL_NO_DH
1409 #ifndef OPENSSL_NO_ECDH
1410 EC_KEY *ecdh = NULL;
1411 BN_CTX *bn_ctx = NULL;
1412 EC_POINT *srvr_ecpoint = NULL;
1414 int encoded_pt_len = 0;
1417 /* use same message size as in ssl3_get_certificate_request()
1418 * as ServerKeyExchange message may be skipped */
1419 n=s->method->ssl_get_message(s,
1420 SSL3_ST_CR_KEY_EXCH_A,
1421 SSL3_ST_CR_KEY_EXCH_B,
1425 if (!ok) return((int)n);
1427 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1429 #ifndef OPENSSL_NO_PSK
1430 /* In plain PSK ciphersuite, ServerKeyExchange can be
1431 omitted if no identity hint is sent. Set
1432 session->sess_cert anyway to avoid problems
1434 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1436 s->session->sess_cert=ssl_sess_cert_new();
1437 if (s->ctx->psk_identity_hint)
1438 OPENSSL_free(s->ctx->psk_identity_hint);
1439 s->ctx->psk_identity_hint = NULL;
1442 s->s3->tmp.reuse_message=1;
1446 param=p=(unsigned char *)s->init_msg;
1447 if (s->session->sess_cert != NULL)
1449 #ifndef OPENSSL_NO_RSA
1450 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1452 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1453 s->session->sess_cert->peer_rsa_tmp=NULL;
1456 #ifndef OPENSSL_NO_DH
1457 if (s->session->sess_cert->peer_dh_tmp)
1459 DH_free(s->session->sess_cert->peer_dh_tmp);
1460 s->session->sess_cert->peer_dh_tmp=NULL;
1463 #ifndef OPENSSL_NO_ECDH
1464 if (s->session->sess_cert->peer_ecdh_tmp)
1466 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1467 s->session->sess_cert->peer_ecdh_tmp=NULL;
1473 s->session->sess_cert=ssl_sess_cert_new();
1477 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1478 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1479 EVP_MD_CTX_init(&md_ctx);
1481 #ifndef OPENSSL_NO_PSK
1482 if (alg_k & SSL_kPSK)
1484 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1486 al=SSL_AD_HANDSHAKE_FAILURE;
1489 /* Store PSK identity hint for later use, hint is used
1490 * in ssl3_send_client_key_exchange. Assume that the
1491 * maximum length of a PSK identity hint can be as
1492 * long as the maximum length of a PSK identity. */
1493 if (i > PSK_MAX_IDENTITY_LEN)
1495 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1496 SSL_R_DATA_LENGTH_TOO_LONG);
1501 al=SSL_AD_DECODE_ERROR;
1502 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1503 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1506 /* If received PSK identity hint contains NULL
1507 * characters, the hint is truncated from the first
1508 * NULL. p may not be ending with NULL, so create a
1509 * NULL-terminated string. */
1510 memcpy(tmp_id_hint, p, i);
1511 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1512 if (s->ctx->psk_identity_hint != NULL)
1513 OPENSSL_free(s->ctx->psk_identity_hint);
1514 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1515 if (s->ctx->psk_identity_hint == NULL)
1517 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1525 #endif /* !OPENSSL_NO_PSK */
1526 #ifndef OPENSSL_NO_SRP
1527 if (alg_k & SSL_kSRP)
1533 al=SSL_AD_DECODE_ERROR;
1534 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1537 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1539 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1548 al=SSL_AD_DECODE_ERROR;
1549 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1552 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1554 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1559 i = (unsigned int)(p[0]);
1564 al=SSL_AD_DECODE_ERROR;
1565 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1568 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1570 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1579 al=SSL_AD_DECODE_ERROR;
1580 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1583 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1585 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1591 /* We must check if there is a certificate */
1592 #ifndef OPENSSL_NO_RSA
1593 if (alg_a & SSL_aRSA)
1594 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1599 #ifndef OPENSSL_NO_DSA
1600 else if (alg_a & SSL_aDSS)
1601 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1605 #endif /* !OPENSSL_NO_SRP */
1606 #ifndef OPENSSL_NO_RSA
1607 if (alg_k & SSL_kRSA)
1609 if ((rsa=RSA_new()) == NULL)
1611 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1618 al=SSL_AD_DECODE_ERROR;
1619 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1622 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1624 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1633 al=SSL_AD_DECODE_ERROR;
1634 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1637 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1639 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1645 /* this should be because we are using an export cipher */
1646 if (alg_a & SSL_aRSA)
1647 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1650 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1653 s->session->sess_cert->peer_rsa_tmp=rsa;
1656 #else /* OPENSSL_NO_RSA */
1660 #ifndef OPENSSL_NO_DH
1661 else if (alg_k & SSL_kDHE)
1663 if ((dh=DH_new()) == NULL)
1665 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1672 al=SSL_AD_DECODE_ERROR;
1673 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1676 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1678 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1687 al=SSL_AD_DECODE_ERROR;
1688 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1691 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1693 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1702 al=SSL_AD_DECODE_ERROR;
1703 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1706 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1708 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1714 #ifndef OPENSSL_NO_RSA
1715 if (alg_a & SSL_aRSA)
1716 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1721 #ifndef OPENSSL_NO_DSA
1722 else if (alg_a & SSL_aDSS)
1723 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1725 /* else anonymous DH, so no certificate or pkey. */
1727 s->session->sess_cert->peer_dh_tmp=dh;
1730 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1732 al=SSL_AD_ILLEGAL_PARAMETER;
1733 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1736 #endif /* !OPENSSL_NO_DH */
1738 #ifndef OPENSSL_NO_ECDH
1739 else if (alg_k & SSL_kECDHE)
1742 const EC_GROUP *group;
1744 if ((ecdh=EC_KEY_new()) == NULL)
1746 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1750 /* Extract elliptic curve parameters and the
1751 * server's ephemeral ECDH public key.
1752 * Keep accumulating lengths of various components in
1753 * param_len and make sure it never exceeds n.
1756 /* XXX: For now we only support named (not generic) curves
1757 * and the ECParameters in this case is just three bytes.
1760 /* Check curve is one of our preferences, if not server has
1761 * sent an invalid curve.
1763 if (!tls1_check_curve(s, p, param_len))
1765 al=SSL_AD_DECODE_ERROR;
1766 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1770 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1772 al=SSL_AD_INTERNAL_ERROR;
1773 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1777 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1780 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1783 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1785 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1788 EC_GROUP_free(ngroup);
1790 group = EC_KEY_get0_group(ecdh);
1792 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1793 (EC_GROUP_get_degree(group) > 163))
1795 al=SSL_AD_EXPORT_RESTRICTION;
1796 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1802 /* Next, get the encoded ECPoint */
1803 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1804 ((bn_ctx = BN_CTX_new()) == NULL))
1806 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1810 encoded_pt_len = *p; /* length of encoded point */
1812 param_len += (1 + encoded_pt_len);
1813 if ((param_len > n) ||
1814 (EC_POINT_oct2point(group, srvr_ecpoint,
1815 p, encoded_pt_len, bn_ctx) == 0))
1817 al=SSL_AD_DECODE_ERROR;
1818 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1825 /* The ECC/TLS specification does not mention
1826 * the use of DSA to sign ECParameters in the server
1827 * key exchange message. We do support RSA and ECDSA.
1830 #ifndef OPENSSL_NO_RSA
1831 else if (alg_a & SSL_aRSA)
1832 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1834 #ifndef OPENSSL_NO_ECDSA
1835 else if (alg_a & SSL_aECDSA)
1836 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1838 /* else anonymous ECDH, so no certificate or pkey. */
1839 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1840 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1842 BN_CTX_free(bn_ctx);
1844 EC_POINT_free(srvr_ecpoint);
1845 srvr_ecpoint = NULL;
1849 al=SSL_AD_UNEXPECTED_MESSAGE;
1850 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1853 #endif /* !OPENSSL_NO_ECDH */
1856 /* p points to the next byte, there are 'n' bytes left */
1858 /* if it was signed, check the signature */
1861 if (SSL_USE_SIGALGS(s))
1863 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1868 al = SSL_AD_DECODE_ERROR;
1872 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1882 j=EVP_PKEY_size(pkey);
1884 if ((i != n) || (n > j) || (n <= 0))
1886 /* wrong packet length */
1887 al=SSL_AD_DECODE_ERROR;
1888 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1892 #ifndef OPENSSL_NO_RSA
1893 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1899 for (num=2; num > 0; num--)
1901 EVP_MD_CTX_set_flags(&md_ctx,
1902 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1903 EVP_DigestInit_ex(&md_ctx,(num == 2)
1904 ?s->ctx->md5:s->ctx->sha1, NULL);
1905 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1906 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1907 EVP_DigestUpdate(&md_ctx,param,param_len);
1908 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1912 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1916 al=SSL_AD_DECRYPT_ERROR;
1917 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1923 al=SSL_AD_DECRYPT_ERROR;
1924 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1931 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1932 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1933 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1934 EVP_VerifyUpdate(&md_ctx,param,param_len);
1935 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1938 al=SSL_AD_DECRYPT_ERROR;
1939 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1946 /* aNULL or kPSK do not need public keys */
1947 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1949 /* Might be wrong key type, check it */
1950 if (ssl3_check_cert_and_algorithm(s))
1951 /* Otherwise this shouldn't happen */
1952 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1955 /* still data left over */
1958 al=SSL_AD_DECODE_ERROR;
1959 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1963 EVP_PKEY_free(pkey);
1964 EVP_MD_CTX_cleanup(&md_ctx);
1967 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1969 EVP_PKEY_free(pkey);
1970 #ifndef OPENSSL_NO_RSA
1974 #ifndef OPENSSL_NO_DH
1978 #ifndef OPENSSL_NO_ECDH
1979 BN_CTX_free(bn_ctx);
1980 EC_POINT_free(srvr_ecpoint);
1984 EVP_MD_CTX_cleanup(&md_ctx);
1988 int ssl3_get_certificate_request(SSL *s)
1991 unsigned long n,nc,l;
1992 unsigned int llen, ctype_num,i;
1994 const unsigned char *p,*q;
1996 STACK_OF(X509_NAME) *ca_sk=NULL;
1998 n=s->method->ssl_get_message(s,
1999 SSL3_ST_CR_CERT_REQ_A,
2000 SSL3_ST_CR_CERT_REQ_B,
2005 if (!ok) return((int)n);
2007 s->s3->tmp.cert_req=0;
2009 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2011 s->s3->tmp.reuse_message=1;
2012 /* If we get here we don't need any cached handshake records
2013 * as we wont be doing client auth.
2015 if (s->s3->handshake_buffer)
2017 if (!ssl3_digest_cached_records(s))
2023 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2025 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2026 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2030 /* TLS does not like anon-DH with client cert */
2031 if (s->version > SSL3_VERSION)
2033 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2035 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2036 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2041 p=d=(unsigned char *)s->init_msg;
2043 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2045 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2049 /* get the certificate types */
2051 if (s->cert->ctypes)
2053 OPENSSL_free(s->cert->ctypes);
2054 s->cert->ctypes = NULL;
2056 if (ctype_num > SSL3_CT_NUMBER)
2058 /* If we exceed static buffer copy all to cert structure */
2059 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2060 memcpy(s->cert->ctypes, p, ctype_num);
2061 s->cert->ctype_num = (size_t)ctype_num;
2062 ctype_num=SSL3_CT_NUMBER;
2064 for (i=0; i<ctype_num; i++)
2065 s->s3->tmp.ctype[i]= p[i];
2067 if (SSL_USE_SIGALGS(s))
2070 /* Check we have enough room for signature algorithms and
2071 * following length value.
2073 if ((unsigned long)(p - d + llen + 2) > n)
2075 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2076 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2079 /* Clear certificate digests and validity flags */
2080 for (i = 0; i < SSL_PKEY_NUM; i++)
2082 s->cert->pkeys[i].digest = NULL;
2083 s->cert->pkeys[i].valid_flags = 0;
2085 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2087 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2088 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2094 /* get the CA RDNs */
2099 out=fopen("/tmp/vsign.der","w");
2100 fwrite(p,1,llen,out);
2105 if ((unsigned long)(p - d + llen) != n)
2107 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2108 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2112 for (nc=0; nc<llen; )
2115 if ((l+nc+2) > llen)
2117 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2118 goto cont; /* netscape bugs */
2119 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2120 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2126 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2128 /* If netscape tolerance is on, ignore errors */
2129 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2133 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2134 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2141 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2142 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2145 if (!sk_X509_NAME_push(ca_sk,xn))
2147 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2161 /* we should setup a certificate to return.... */
2162 s->s3->tmp.cert_req=1;
2163 s->s3->tmp.ctype_num=ctype_num;
2164 if (s->s3->tmp.ca_names != NULL)
2165 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2166 s->s3->tmp.ca_names=ca_sk;
2171 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2175 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2177 return(X509_NAME_cmp(*a,*b));
2179 #ifndef OPENSSL_NO_TLSEXT
2180 int ssl3_get_new_session_ticket(SSL *s)
2182 int ok,al,ret=0, ticklen;
2184 const unsigned char *p;
2187 n=s->method->ssl_get_message(s,
2188 SSL3_ST_CR_SESSION_TICKET_A,
2189 SSL3_ST_CR_SESSION_TICKET_B,
2197 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2199 s->s3->tmp.reuse_message=1;
2202 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2204 al=SSL_AD_UNEXPECTED_MESSAGE;
2205 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2210 /* need at least ticket_lifetime_hint + ticket length */
2211 al = SSL_AD_DECODE_ERROR;
2212 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2216 p=d=(unsigned char *)s->init_msg;
2217 n2l(p, s->session->tlsext_tick_lifetime_hint);
2219 /* ticket_lifetime_hint + ticket_length + ticket */
2220 if (ticklen + 6 != n)
2222 al = SSL_AD_DECODE_ERROR;
2223 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2226 if (s->session->tlsext_tick)
2228 OPENSSL_free(s->session->tlsext_tick);
2229 s->session->tlsext_ticklen = 0;
2231 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2232 if (!s->session->tlsext_tick)
2234 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2237 memcpy(s->session->tlsext_tick, p, ticklen);
2238 s->session->tlsext_ticklen = ticklen;
2239 /* There are two ways to detect a resumed ticket sesion.
2240 * One is to set an appropriate session ID and then the server
2241 * must return a match in ServerHello. This allows the normal
2242 * client session ID matching to work and we know much
2243 * earlier that the ticket has been accepted.
2245 * The other way is to set zero length session ID when the
2246 * ticket is presented and rely on the handshake to determine
2247 * session resumption.
2249 * We choose the former approach because this fits in with
2250 * assumptions elsewhere in OpenSSL. The session ID is set
2251 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2254 EVP_Digest(p, ticklen,
2255 s->session->session_id, &s->session->session_id_length,
2256 #ifndef OPENSSL_NO_SHA256
2257 EVP_sha256(), NULL);
2264 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2269 int ssl3_get_cert_status(SSL *s)
2272 unsigned long resplen,n;
2273 const unsigned char *p;
2275 n=s->method->ssl_get_message(s,
2276 SSL3_ST_CR_CERT_STATUS_A,
2277 SSL3_ST_CR_CERT_STATUS_B,
2278 SSL3_MT_CERTIFICATE_STATUS,
2282 if (!ok) return((int)n);
2285 /* need at least status type + length */
2286 al = SSL_AD_DECODE_ERROR;
2287 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2290 p = (unsigned char *)s->init_msg;
2291 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2293 al = SSL_AD_DECODE_ERROR;
2294 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2298 if (resplen + 4 != n)
2300 al = SSL_AD_DECODE_ERROR;
2301 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2304 if (s->tlsext_ocsp_resp)
2305 OPENSSL_free(s->tlsext_ocsp_resp);
2306 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2307 if (!s->tlsext_ocsp_resp)
2309 al = SSL_AD_INTERNAL_ERROR;
2310 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2313 s->tlsext_ocsp_resplen = resplen;
2314 if (s->ctx->tlsext_status_cb)
2317 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2320 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2321 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2326 al = SSL_AD_INTERNAL_ERROR;
2327 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2333 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2338 int ssl3_get_server_done(SSL *s)
2343 n=s->method->ssl_get_message(s,
2344 SSL3_ST_CR_SRVR_DONE_A,
2345 SSL3_ST_CR_SRVR_DONE_B,
2346 SSL3_MT_SERVER_DONE,
2347 30, /* should be very small, like 0 :-) */
2350 if (!ok) return((int)n);
2353 /* should contain no data */
2354 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2355 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2363 int ssl3_send_client_key_exchange(SSL *s)
2367 unsigned long alg_k;
2368 #ifndef OPENSSL_NO_RSA
2370 EVP_PKEY *pkey=NULL;
2372 #ifndef OPENSSL_NO_KRB5
2374 #endif /* OPENSSL_NO_KRB5 */
2375 #ifndef OPENSSL_NO_ECDH
2376 EC_KEY *clnt_ecdh = NULL;
2377 const EC_POINT *srvr_ecpoint = NULL;
2378 EVP_PKEY *srvr_pub_pkey = NULL;
2379 unsigned char *encodedPoint = NULL;
2380 int encoded_pt_len = 0;
2381 BN_CTX * bn_ctx = NULL;
2384 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2386 p = ssl_handshake_start(s);
2388 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2390 /* Fool emacs indentation */
2392 #ifndef OPENSSL_NO_RSA
2393 else if (alg_k & SSL_kRSA)
2396 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2398 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2399 rsa=s->session->sess_cert->peer_rsa_tmp;
2402 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2403 if ((pkey == NULL) ||
2404 (pkey->type != EVP_PKEY_RSA) ||
2405 (pkey->pkey.rsa == NULL))
2407 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2411 EVP_PKEY_free(pkey);
2414 tmp_buf[0]=s->client_version>>8;
2415 tmp_buf[1]=s->client_version&0xff;
2416 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2419 s->session->master_key_length=sizeof tmp_buf;
2422 /* Fix buf for TLS and beyond */
2423 if (s->version > SSL3_VERSION)
2425 n=RSA_public_encrypt(sizeof tmp_buf,
2426 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2428 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2429 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2433 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2437 /* Fix buf for TLS and beyond */
2438 if (s->version > SSL3_VERSION)
2444 s->session->master_key_length=
2445 s->method->ssl3_enc->generate_master_secret(s,
2446 s->session->master_key,
2447 tmp_buf,sizeof tmp_buf);
2448 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2451 #ifndef OPENSSL_NO_KRB5
2452 else if (alg_k & SSL_kKRB5)
2454 krb5_error_code krb5rc;
2455 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2456 /* krb5_data krb5_ap_req; */
2457 krb5_data *enc_ticket;
2458 krb5_data authenticator, *authp = NULL;
2459 EVP_CIPHER_CTX ciph_ctx;
2460 const EVP_CIPHER *enc = NULL;
2461 unsigned char iv[EVP_MAX_IV_LENGTH];
2462 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2463 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2464 + EVP_MAX_IV_LENGTH];
2465 int padl, outl = sizeof(epms);
2467 EVP_CIPHER_CTX_init(&ciph_ctx);
2470 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2472 #endif /* KSSL_DEBUG */
2476 if (KRB5SENDAUTH) authp = &authenticator;
2477 #endif /* KRB5SENDAUTH */
2479 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2481 enc = kssl_map_enc(kssl_ctx->enctype);
2486 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2487 if (krb5rc && kssl_err.text)
2488 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2490 #endif /* KSSL_DEBUG */
2494 ssl3_send_alert(s,SSL3_AL_FATAL,
2495 SSL_AD_HANDSHAKE_FAILURE);
2496 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2501 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2502 ** in place of RFC 2712 KerberosWrapper, as in:
2504 ** Send ticket (copy to *p, set n = length)
2505 ** n = krb5_ap_req.length;
2506 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2507 ** if (krb5_ap_req.data)
2508 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2510 ** Now using real RFC 2712 KerberosWrapper
2511 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2512 ** Note: 2712 "opaque" types are here replaced
2513 ** with a 2-byte length followed by the value.
2515 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2516 ** Where "xx xx" = length bytes. Shown here with
2517 ** optional authenticator omitted.
2520 /* KerberosWrapper.Ticket */
2521 s2n(enc_ticket->length,p);
2522 memcpy(p, enc_ticket->data, enc_ticket->length);
2523 p+= enc_ticket->length;
2524 n = enc_ticket->length + 2;
2526 /* KerberosWrapper.Authenticator */
2527 if (authp && authp->length)
2529 s2n(authp->length,p);
2530 memcpy(p, authp->data, authp->length);
2532 n+= authp->length + 2;
2540 s2n(0,p);/* null authenticator length */
2544 tmp_buf[0]=s->client_version>>8;
2545 tmp_buf[1]=s->client_version&0xff;
2546 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2549 /* 20010420 VRS. Tried it this way; failed.
2550 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2551 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2552 ** kssl_ctx->length);
2553 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2556 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2557 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2559 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2561 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2563 if (outl > (int)sizeof epms)
2565 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2568 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2570 /* KerberosWrapper.EncryptedPreMasterSecret */
2572 memcpy(p, epms, outl);
2576 s->session->master_key_length=
2577 s->method->ssl3_enc->generate_master_secret(s,
2578 s->session->master_key,
2579 tmp_buf, sizeof tmp_buf);
2581 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2582 OPENSSL_cleanse(epms, outl);
2585 #ifndef OPENSSL_NO_DH
2586 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2588 DH *dh_srvr,*dh_clnt;
2589 SESS_CERT *scert = s->session->sess_cert;
2593 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2594 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2598 if (scert->peer_dh_tmp != NULL)
2599 dh_srvr=scert->peer_dh_tmp;
2602 /* we get them from the cert */
2603 int idx = scert->peer_cert_type;
2604 EVP_PKEY *spkey = NULL;
2607 spkey = X509_get_pubkey(
2608 scert->peer_pkeys[idx].x509);
2611 dh_srvr = EVP_PKEY_get1_DH(spkey);
2612 EVP_PKEY_free(spkey);
2614 if (dh_srvr == NULL)
2616 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2617 ERR_R_INTERNAL_ERROR);
2621 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2623 /* Use client certificate key */
2624 EVP_PKEY *clkey = s->cert->key->privatekey;
2627 dh_clnt = EVP_PKEY_get1_DH(clkey);
2628 if (dh_clnt == NULL)
2630 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2631 ERR_R_INTERNAL_ERROR);
2637 /* generate a new random key */
2638 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2640 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2643 if (!DH_generate_key(dh_clnt))
2645 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2651 /* use the 'p' output buffer for the DH key, but
2652 * make sure to clear it out afterwards */
2654 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2655 if (scert->peer_dh_tmp == NULL)
2660 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2665 /* generate master key from the result */
2666 s->session->master_key_length=
2667 s->method->ssl3_enc->generate_master_secret(s,
2668 s->session->master_key,p,n);
2672 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2676 /* send off the data */
2677 n=BN_num_bytes(dh_clnt->pub_key);
2679 BN_bn2bin(dh_clnt->pub_key,p);
2685 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2689 #ifndef OPENSSL_NO_ECDH
2690 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2692 const EC_GROUP *srvr_group = NULL;
2694 int ecdh_clnt_cert = 0;
2697 /* Did we send out the client's
2698 * ECDH share for use in premaster
2699 * computation as part of client certificate?
2700 * If so, set ecdh_clnt_cert to 1.
2702 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2704 /* XXX: For now, we do not support client
2705 * authentication using ECDH certificates.
2706 * To add such support, one needs to add
2707 * code that checks for appropriate
2708 * conditions and sets ecdh_clnt_cert to 1.
2709 * For example, the cert have an ECC
2710 * key on the same curve as the server's
2711 * and the key should be authorized for
2714 * One also needs to add code in ssl3_connect
2715 * to skip sending the certificate verify
2718 * if ((s->cert->key->privatekey != NULL) &&
2719 * (s->cert->key->privatekey->type ==
2720 * EVP_PKEY_EC) && ...)
2721 * ecdh_clnt_cert = 1;
2725 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2727 tkey = s->session->sess_cert->peer_ecdh_tmp;
2731 /* Get the Server Public Key from Cert */
2732 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2733 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2734 if ((srvr_pub_pkey == NULL) ||
2735 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2736 (srvr_pub_pkey->pkey.ec == NULL))
2738 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2739 ERR_R_INTERNAL_ERROR);
2743 tkey = srvr_pub_pkey->pkey.ec;
2746 srvr_group = EC_KEY_get0_group(tkey);
2747 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2749 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2751 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2752 ERR_R_INTERNAL_ERROR);
2756 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2758 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2762 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2764 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2769 /* Reuse key info from our certificate
2770 * We only need our private key to perform
2771 * the ECDH computation.
2773 const BIGNUM *priv_key;
2774 tkey = s->cert->key->privatekey->pkey.ec;
2775 priv_key = EC_KEY_get0_private_key(tkey);
2776 if (priv_key == NULL)
2778 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2781 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2783 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2789 /* Generate a new ECDH key pair */
2790 if (!(EC_KEY_generate_key(clnt_ecdh)))
2792 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2797 /* use the 'p' output buffer for the ECDH key, but
2798 * make sure to clear it out afterwards
2801 field_size = EC_GROUP_get_degree(srvr_group);
2802 if (field_size <= 0)
2804 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2808 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2811 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2816 /* generate master key from the result */
2817 s->session->master_key_length = s->method->ssl3_enc \
2818 -> generate_master_secret(s,
2819 s->session->master_key,
2822 memset(p, 0, n); /* clean up */
2826 /* Send empty client key exch message */
2831 /* First check the size of encoding and
2832 * allocate memory accordingly.
2835 EC_POINT_point2oct(srvr_group,
2836 EC_KEY_get0_public_key(clnt_ecdh),
2837 POINT_CONVERSION_UNCOMPRESSED,
2840 encodedPoint = (unsigned char *)
2841 OPENSSL_malloc(encoded_pt_len *
2842 sizeof(unsigned char));
2843 bn_ctx = BN_CTX_new();
2844 if ((encodedPoint == NULL) ||
2847 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2851 /* Encode the public key */
2852 n = EC_POINT_point2oct(srvr_group,
2853 EC_KEY_get0_public_key(clnt_ecdh),
2854 POINT_CONVERSION_UNCOMPRESSED,
2855 encodedPoint, encoded_pt_len, bn_ctx);
2857 *p = n; /* length of encoded point */
2858 /* Encoded point will be copied here */
2860 /* copy the point */
2861 memcpy((unsigned char *)p, encodedPoint, n);
2862 /* increment n to account for length field */
2866 /* Free allocated memory */
2867 BN_CTX_free(bn_ctx);
2868 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2869 if (clnt_ecdh != NULL)
2870 EC_KEY_free(clnt_ecdh);
2871 EVP_PKEY_free(srvr_pub_pkey);
2873 #endif /* !OPENSSL_NO_ECDH */
2874 else if (alg_k & SSL_kGOST)
2876 /* GOST key exchange message creation */
2877 EVP_PKEY_CTX *pkey_ctx;
2880 unsigned int md_len;
2882 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2883 EVP_MD_CTX *ukm_hash;
2886 /* Get server sertificate PKEY and create ctx from it */
2887 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2889 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2891 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2895 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2896 /* If we have send a certificate, and certificate key
2898 * parameters match those of server certificate, use
2899 * certificate key for key exchange
2902 /* Otherwise, generate ephemeral key pair */
2904 EVP_PKEY_encrypt_init(pkey_ctx);
2905 /* Generate session key */
2906 RAND_bytes(premaster_secret,32);
2907 /* If we have client certificate, use its secret as peer key */
2908 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2909 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2910 /* If there was an error - just ignore it. Ephemeral key
2916 /* Compute shared IV and store it in algorithm-specific
2918 ukm_hash = EVP_MD_CTX_create();
2919 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2920 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2921 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2922 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2923 EVP_MD_CTX_destroy(ukm_hash);
2924 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2926 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2930 /* Make GOST keytransport blob message */
2931 /*Encapsulate it into sequence */
2932 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2934 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2935 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2942 *(p++)= msglen & 0xff;
2947 *(p++)= msglen & 0xff;
2950 memcpy(p, tmp, msglen);
2951 /* Check if pubkey from client certificate was used */
2952 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2954 /* Set flag "skip certificate verify" */
2955 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2957 EVP_PKEY_CTX_free(pkey_ctx);
2958 s->session->master_key_length=
2959 s->method->ssl3_enc->generate_master_secret(s,
2960 s->session->master_key,premaster_secret,32);
2961 EVP_PKEY_free(pub_key);
2964 #ifndef OPENSSL_NO_SRP
2965 else if (alg_k & SSL_kSRP)
2967 if (s->srp_ctx.A != NULL)
2969 /* send off the data */
2970 n=BN_num_bytes(s->srp_ctx.A);
2972 BN_bn2bin(s->srp_ctx.A,p);
2977 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2980 if (s->session->srp_username != NULL)
2981 OPENSSL_free(s->session->srp_username);
2982 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2983 if (s->session->srp_username == NULL)
2985 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2986 ERR_R_MALLOC_FAILURE);
2990 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2992 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2997 #ifndef OPENSSL_NO_PSK
2998 else if (alg_k & SSL_kPSK)
3000 char identity[PSK_MAX_IDENTITY_LEN];
3001 unsigned char *t = NULL;
3002 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3003 unsigned int pre_ms_len = 0, psk_len = 0;
3007 if (s->psk_client_callback == NULL)
3009 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3010 SSL_R_PSK_NO_CLIENT_CB);
3014 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3015 identity, PSK_MAX_IDENTITY_LEN,
3016 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3017 if (psk_len > PSK_MAX_PSK_LEN)
3019 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3020 ERR_R_INTERNAL_ERROR);
3023 else if (psk_len == 0)
3025 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3026 SSL_R_PSK_IDENTITY_NOT_FOUND);
3030 /* create PSK pre_master_secret */
3031 pre_ms_len = 2+psk_len+2+psk_len;
3033 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3035 memset(t, 0, psk_len);
3039 if (s->session->psk_identity_hint != NULL)
3040 OPENSSL_free(s->session->psk_identity_hint);
3041 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3042 if (s->ctx->psk_identity_hint != NULL &&
3043 s->session->psk_identity_hint == NULL)
3045 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3046 ERR_R_MALLOC_FAILURE);
3050 if (s->session->psk_identity != NULL)
3051 OPENSSL_free(s->session->psk_identity);
3052 s->session->psk_identity = BUF_strdup(identity);
3053 if (s->session->psk_identity == NULL)
3055 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3056 ERR_R_MALLOC_FAILURE);
3060 s->session->master_key_length =
3061 s->method->ssl3_enc->generate_master_secret(s,
3062 s->session->master_key,
3063 psk_or_pre_ms, pre_ms_len);
3064 n = strlen(identity);
3066 memcpy(p, identity, n);
3070 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
3071 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3074 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3081 ssl3_send_alert(s, SSL3_AL_FATAL,
3082 SSL_AD_HANDSHAKE_FAILURE);
3083 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3084 ERR_R_INTERNAL_ERROR);
3088 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3089 s->state=SSL3_ST_CW_KEY_EXCH_B;
3092 /* SSL3_ST_CW_KEY_EXCH_B */
3093 return ssl_do_write(s);
3095 #ifndef OPENSSL_NO_ECDH
3096 BN_CTX_free(bn_ctx);
3097 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3098 if (clnt_ecdh != NULL)
3099 EC_KEY_free(clnt_ecdh);
3100 EVP_PKEY_free(srvr_pub_pkey);
3105 int ssl3_send_client_verify(SSL *s)
3108 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3110 EVP_PKEY_CTX *pctx=NULL;
3116 EVP_MD_CTX_init(&mctx);
3118 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3120 p= ssl_handshake_start(s);
3121 pkey=s->cert->key->privatekey;
3122 /* Create context from key and test if sha1 is allowed as digest */
3123 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3124 EVP_PKEY_sign_init(pctx);
3125 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3127 if (!SSL_USE_SIGALGS(s))
3128 s->method->ssl3_enc->cert_verify_mac(s,
3130 &(data[MD5_DIGEST_LENGTH]));
3136 /* For TLS v1.2 send signature algorithm and signature
3137 * using agreed digest and cached handshake records.
3139 if (SSL_USE_SIGALGS(s))
3143 const EVP_MD *md = s->cert->key->digest;
3144 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3146 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3148 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3149 ERR_R_INTERNAL_ERROR);
3154 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3157 if (!EVP_SignInit_ex(&mctx, md, NULL)
3158 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3159 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3161 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3167 if (!ssl3_digest_cached_records(s))
3171 #ifndef OPENSSL_NO_RSA
3172 if (pkey->type == EVP_PKEY_RSA)
3174 s->method->ssl3_enc->cert_verify_mac(s,
3177 if (RSA_sign(NID_md5_sha1, data,
3178 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3179 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3181 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3189 #ifndef OPENSSL_NO_DSA
3190 if (pkey->type == EVP_PKEY_DSA)
3192 if (!DSA_sign(pkey->save_type,
3193 &(data[MD5_DIGEST_LENGTH]),
3194 SHA_DIGEST_LENGTH,&(p[2]),
3195 (unsigned int *)&j,pkey->pkey.dsa))
3197 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3205 #ifndef OPENSSL_NO_ECDSA
3206 if (pkey->type == EVP_PKEY_EC)
3208 if (!ECDSA_sign(pkey->save_type,
3209 &(data[MD5_DIGEST_LENGTH]),
3210 SHA_DIGEST_LENGTH,&(p[2]),
3211 (unsigned int *)&j,pkey->pkey.ec))
3213 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3222 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3224 unsigned char signbuf[64];
3227 s->method->ssl3_enc->cert_verify_mac(s,
3228 NID_id_GostR3411_94,
3230 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3231 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3232 ERR_R_INTERNAL_ERROR);
3235 for (i=63,j=0; i>=0; j++, i--) {
3243 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3246 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3247 s->state=SSL3_ST_CW_CERT_VRFY_B;
3249 EVP_MD_CTX_cleanup(&mctx);
3250 EVP_PKEY_CTX_free(pctx);
3251 return ssl_do_write(s);
3253 EVP_MD_CTX_cleanup(&mctx);
3254 EVP_PKEY_CTX_free(pctx);
3258 /* Check a certificate can be used for client authentication. Currently
3259 * check cert exists, if we have a suitable digest for TLS 1.2 if
3260 * static DH client certificates can be used and optionally checks
3261 * suitability for Suite B.
3263 static int ssl3_check_client_certificate(SSL *s)
3265 unsigned long alg_k;
3266 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3268 /* If no suitable signature algorithm can't use certificate */
3269 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3271 /* If strict mode check suitability of chain before using it.
3272 * This also adjusts suite B digest if necessary.
3274 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3275 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3277 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3278 /* See if we can use client certificate for fixed DH */
3279 if (alg_k & (SSL_kDHr|SSL_kDHd))
3281 SESS_CERT *scert = s->session->sess_cert;
3282 int i = scert->peer_cert_type;
3283 EVP_PKEY *clkey = NULL, *spkey = NULL;
3284 clkey = s->cert->key->privatekey;
3285 /* If client key not DH assume it can be used */
3286 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3289 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3292 /* Compare server and client parameters */
3293 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3294 EVP_PKEY_free(spkey);
3298 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3303 int ssl3_send_client_certificate(SSL *s)
3306 EVP_PKEY *pkey=NULL;
3309 if (s->state == SSL3_ST_CW_CERT_A)
3311 /* Let cert callback update client certificates if required */
3312 if (s->cert->cert_cb)
3314 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3317 s->rwstate=SSL_X509_LOOKUP;
3322 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3325 s->rwstate=SSL_NOTHING;
3327 if (ssl3_check_client_certificate(s))
3328 s->state=SSL3_ST_CW_CERT_C;
3330 s->state=SSL3_ST_CW_CERT_B;
3333 /* We need to get a client cert */
3334 if (s->state == SSL3_ST_CW_CERT_B)
3336 /* If we get an error, we need to
3337 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3338 * We then get retied later */
3340 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3343 s->rwstate=SSL_X509_LOOKUP;
3346 s->rwstate=SSL_NOTHING;
3347 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3349 s->state=SSL3_ST_CW_CERT_B;
3350 if ( !SSL_use_certificate(s,x509) ||
3351 !SSL_use_PrivateKey(s,pkey))
3357 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3360 if (x509 != NULL) X509_free(x509);
3361 if (pkey != NULL) EVP_PKEY_free(pkey);
3362 if (i && !ssl3_check_client_certificate(s))
3366 if (s->version == SSL3_VERSION)
3368 s->s3->tmp.cert_req=0;
3369 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3374 s->s3->tmp.cert_req=2;
3378 /* Ok, we have a cert */
3379 s->state=SSL3_ST_CW_CERT_C;
3382 if (s->state == SSL3_ST_CW_CERT_C)
3384 s->state=SSL3_ST_CW_CERT_D;
3385 ssl3_output_cert_chain(s,
3386 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3388 /* SSL3_ST_CW_CERT_D */
3389 return ssl_do_write(s);
3392 #define has_bits(i,m) (((i)&(m)) == (m))
3394 int ssl3_check_cert_and_algorithm(SSL *s)
3398 EVP_PKEY *pkey=NULL;
3400 #ifndef OPENSSL_NO_RSA
3403 #ifndef OPENSSL_NO_DH
3407 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3408 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3410 /* we don't have a certificate */
3411 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3414 sc=s->session->sess_cert;
3417 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3421 #ifndef OPENSSL_NO_RSA
3422 rsa=s->session->sess_cert->peer_rsa_tmp;
3424 #ifndef OPENSSL_NO_DH
3425 dh=s->session->sess_cert->peer_dh_tmp;
3428 /* This is the passed certificate */
3430 idx=sc->peer_cert_type;
3431 #ifndef OPENSSL_NO_ECDH
3432 if (idx == SSL_PKEY_ECC)
3434 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3436 { /* check failed */
3437 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3445 else if (alg_a & SSL_aECDSA)
3447 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3450 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3452 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3456 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3457 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3458 EVP_PKEY_free(pkey);
3461 /* Check that we have a certificate if we require one */
3462 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3464 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3467 #ifndef OPENSSL_NO_DSA
3468 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3470 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3474 #ifndef OPENSSL_NO_RSA
3475 if ((alg_k & SSL_kRSA) &&
3476 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3478 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3482 #ifndef OPENSSL_NO_DH
3483 if ((alg_k & SSL_kDHE) &&
3484 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3486 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3489 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3490 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3492 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3495 #ifndef OPENSSL_NO_DSA
3496 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3497 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3499 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3505 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3507 #ifndef OPENSSL_NO_RSA
3508 if (alg_k & SSL_kRSA)
3511 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3513 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3519 #ifndef OPENSSL_NO_DH
3520 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3523 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3525 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3532 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3538 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3543 /* Check to see if handshake is full or resumed. Usually this is just a
3544 * case of checking to see if a cache hit has occurred. In the case of
3545 * session tickets we have to check the next message to be sure.
3548 #ifndef OPENSSL_NO_TLSEXT
3549 # ifndef OPENSSL_NO_NEXTPROTONEG
3550 int ssl3_send_next_proto(SSL *s)
3552 unsigned int len, padding_len;
3555 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3557 len = s->next_proto_negotiated_len;
3558 padding_len = 32 - ((len + 2) % 32);
3559 d = (unsigned char *)s->init_buf->data;
3561 memcpy(d + 5, s->next_proto_negotiated, len);
3562 d[5 + len] = padding_len;
3563 memset(d + 6 + len, 0, padding_len);
3564 *(d++)=SSL3_MT_NEXT_PROTO;
3565 l2n3(2 + len + padding_len, d);
3566 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3567 s->init_num = 4 + 2 + len + padding_len;
3571 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3575 int ssl3_check_finished(SSL *s)
3580 /* Read the message to see if it is supplemental data,
3581 * regardless if there is a session ticket this function is
3582 * called when we really expect a Certificate message, so
3583 * permit appropriate message length */
3584 n=s->method->ssl_get_message(s,
3590 if (!ok) return((int)n);
3591 s->s3->tmp.reuse_message = 1;
3593 if (s->s3->tmp.message_type == SSL3_MT_SUPPLEMENTAL_DATA)
3595 /* If we have no ticket it cannot be a resumed session. */
3596 if (!s->session->tlsext_tick)
3598 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3599 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3606 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3609 #ifndef OPENSSL_NO_ENGINE
3610 if (s->ctx->client_cert_engine)
3612 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3613 SSL_get_client_CA_list(s),
3614 px509, ppkey, NULL, NULL, NULL);
3619 if (s->ctx->client_cert_cb)
3620 i = s->ctx->client_cert_cb(s,px509,ppkey);
3624 #ifndef OPENSSL_NO_TLSEXT
3625 int tls1_send_client_supplemental_data(SSL *s, int *skip)
3628 if (s->ctx->cli_supp_data_records_count)
3630 unsigned char *p = NULL;
3631 unsigned char *size_loc = NULL;
3632 cli_supp_data_record *record = NULL;
3636 for (i = 0; i < s->ctx->cli_supp_data_records_count; i++)
3638 const unsigned char *out = NULL;
3639 unsigned short outlen = 0;
3641 record = &s->ctx->cli_supp_data_records[i];
3643 /* NULL callback or -1 omits supp data entry*/
3646 cb_retval = record->fn2(s, record->supp_data_type,
3649 if (cb_retval == -1)
3650 continue; /* skip this supp data entry */
3653 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3656 if (outlen == 0 || TLSEXT_MAXLEN_supplemental_data < outlen + 4 + length)
3658 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3661 /* if first entry, write handshake message type */
3664 if (!BUF_MEM_grow_clean(s->init_buf, 4))
3666 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3669 p = (unsigned char *)s->init_buf->data;
3670 *(p++) = SSL3_MT_SUPPLEMENTAL_DATA;
3671 /* update message length when all
3672 * callbacks complete */
3674 /* skip over handshake length field (3
3675 * bytes) and supp_data length field
3680 if (!BUF_MEM_grow(s->init_buf, outlen + 4))
3682 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3685 s2n(record->supp_data_type, p);
3687 memcpy(p, out, outlen);
3688 length += (outlen + 4);
3693 /* write handshake length */
3694 l2n3(length - 4, size_loc);
3695 /* supp_data length */
3696 l2n3(length - 7, size_loc);
3697 s->state = SSL3_ST_CW_SUPPLEMENTAL_DATA_B;
3698 s->init_num = length;
3700 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3704 /* no supp data message sent */
3711 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3715 int tls1_get_server_supplemental_data(SSL *s)
3720 const unsigned char *p, *d;
3721 unsigned short supp_data_entry_type = 0;
3722 unsigned long supp_data_entry_len = 0;
3723 unsigned long supp_data_len = 0;
3727 n=s->method->ssl_get_message(s,
3728 SSL3_ST_CR_SUPPLEMENTAL_DATA_A,
3729 SSL3_ST_CR_SUPPLEMENTAL_DATA_B,
3730 SSL3_MT_SUPPLEMENTAL_DATA,
3731 /* use default limit */
3732 TLSEXT_MAXLEN_supplemental_data,
3735 if (!ok) return((int)n);
3737 p = (unsigned char *)s->init_msg;
3739 /* The message cannot be empty */
3742 al = SSL_AD_DECODE_ERROR;
3743 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3746 n2l3(p, supp_data_len);
3747 while (p < d+supp_data_len)
3749 n2s(p, supp_data_entry_type);
3750 n2s(p, supp_data_entry_len);
3751 /* if there is a callback for this supp data type, send it */
3752 for (i=0; i < s->ctx->cli_supp_data_records_count; i++)
3754 if (s->ctx->cli_supp_data_records[i].supp_data_type == supp_data_entry_type &&
3755 s->ctx->cli_supp_data_records[i].fn1)
3757 cb_retval = s->ctx->cli_supp_data_records[i].fn1(s, supp_data_entry_type, p,
3758 supp_data_entry_len, &al,
3759 s->ctx->cli_supp_data_records[i].arg);
3762 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA, ERR_R_SSL_LIB);
3767 p += supp_data_entry_len;
3771 ssl3_send_alert(s,SSL3_AL_FATAL,al);