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 s->s3->flags |= SSL3_FLAGS_CCS_OK;
596 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
597 SSL3_ST_CR_FINISHED_B);
598 if (ret <= 0) goto end;
601 s->state=SSL3_ST_CW_CHANGE_A;
607 case SSL3_ST_CW_FLUSH:
608 s->rwstate=SSL_WRITING;
609 if (BIO_flush(s->wbio) <= 0)
614 s->rwstate=SSL_NOTHING;
615 s->state=s->s3->tmp.next_state;
619 /* clean a few things up */
620 ssl3_cleanup_key_block(s);
622 if (s->init_buf != NULL)
624 BUF_MEM_free(s->init_buf);
628 /* If we are not 'joining' the last two packets,
629 * remove the buffering now */
630 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
631 ssl_free_wbio_buffer(s);
632 /* else do it later in ssl3_write */
638 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
639 if (s->hit) s->ctx->stats.sess_hit++;
643 s->handshake_func=ssl3_connect;
644 s->ctx->stats.sess_connect_good++;
646 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
652 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
658 /* did we do anything */
659 if (!s->s3->tmp.reuse_message && !skip)
663 if ((ret=BIO_flush(s->wbio)) <= 0)
667 if ((cb != NULL) && (s->state != state))
671 cb(s,SSL_CB_CONNECT_LOOP,1);
682 cb(s,SSL_CB_CONNECT_EXIT,ret);
687 int ssl3_client_hello(SSL *s)
694 #ifndef OPENSSL_NO_COMP
699 buf=(unsigned char *)s->init_buf->data;
700 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
702 SSL_SESSION *sess = s->session;
703 if ((sess == NULL) ||
704 (sess->ssl_version != s->version) ||
705 #ifdef OPENSSL_NO_TLSEXT
706 !sess->session_id_length ||
708 (!sess->session_id_length && !sess->tlsext_tick) ||
710 (sess->not_resumable))
712 if (!ssl_get_new_session(s,0))
715 if (s->method->version == DTLS_ANY_VERSION)
717 /* Determine which DTLS version to use */
718 int options = s->options;
719 /* If DTLS 1.2 disabled correct the version number */
720 if (options & SSL_OP_NO_DTLSv1_2)
724 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
727 /* Disabling all versions is silly: return an
730 if (options & SSL_OP_NO_DTLSv1)
732 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
735 /* Update method so we don't use any DTLS 1.2
738 s->method = DTLSv1_client_method();
739 s->version = DTLS1_VERSION;
743 /* We only support one version: update method */
744 if (options & SSL_OP_NO_DTLSv1)
745 s->method = DTLSv1_2_client_method();
746 s->version = DTLS1_2_VERSION;
748 s->client_version = s->version;
750 /* else use the pre-loaded session */
752 p=s->s3->client_random;
754 /* for DTLS if client_random is initialized, reuse it, we are
755 * required to use same upon reply to HelloVerify */
760 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
773 ssl_fill_hello_random(s, 0, p,
774 sizeof(s->s3->client_random));
776 /* Do the message type and length last */
777 d=p= ssl_handshake_start(s);
779 /* version indicates the negotiated version: for example from
780 * an SSLv2/v3 compatible client hello). The client_version
781 * field is the maximum version we permit and it is also
782 * used in RSA encrypted premaster secrets. Some servers can
783 * choke if we initially report a higher version then
784 * renegotiate to a lower one in the premaster secret. This
785 * didn't happen with TLS 1.0 as most servers supported it
786 * but it can with TLS 1.1 or later if the server only supports
789 * Possible scenario with previous logic:
790 * 1. Client hello indicates TLS 1.2
791 * 2. Server hello says TLS 1.0
792 * 3. RSA encrypted premaster secret uses 1.2.
793 * 4. Handhaked proceeds using TLS 1.0.
794 * 5. Server sends hello request to renegotiate.
795 * 6. Client hello indicates TLS v1.0 as we now
796 * know that is maximum server supports.
797 * 7. Server chokes on RSA encrypted premaster secret
798 * containing version 1.0.
800 * For interoperability it should be OK to always use the
801 * maximum version we support in client hello and then rely
802 * on the checking of version to ensure the servers isn't
803 * being inconsistent: for example initially negotiating with
804 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
805 * client_version in client hello and not resetting it to
806 * the negotiated version.
809 *(p++)=s->version>>8;
810 *(p++)=s->version&0xff;
811 s->client_version=s->version;
813 *(p++)=s->client_version>>8;
814 *(p++)=s->client_version&0xff;
818 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
825 i=s->session->session_id_length;
829 if (i > (int)sizeof(s->session->session_id))
831 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
834 memcpy(p,s->session->session_id,i);
838 /* cookie stuff for DTLS */
841 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
843 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
846 *(p++) = s->d1->cookie_len;
847 memcpy(p, s->d1->cookie, s->d1->cookie_len);
848 p += s->d1->cookie_len;
851 /* Ciphers supported */
852 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
855 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
858 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
859 /* Some servers hang if client hello > 256 bytes
860 * as hack workaround chop number of supported ciphers
861 * to keep it well below this if we use TLS v1.2
863 if (TLS1_get_version(s) >= TLS1_2_VERSION
864 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
865 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
871 #ifdef OPENSSL_NO_COMP
875 if ((s->options & SSL_OP_NO_COMPRESSION)
876 || !s->ctx->comp_methods)
879 j=sk_SSL_COMP_num(s->ctx->comp_methods);
883 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
887 *(p++)=0; /* Add the NULL method */
889 #ifndef OPENSSL_NO_TLSEXT
891 if (ssl_prepare_clienthello_tlsext(s) <= 0)
893 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
896 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
898 ssl3_send_alert(s,SSL3_AL_FATAL,al);
899 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
905 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
906 s->state=SSL3_ST_CW_CLNT_HELLO_B;
909 /* SSL3_ST_CW_CLNT_HELLO_B */
910 return ssl_do_write(s);
915 int ssl3_get_server_hello(SSL *s)
917 STACK_OF(SSL_CIPHER) *sk;
921 int i,al=SSL_AD_INTERNAL_ERROR,ok;
924 #ifndef OPENSSL_NO_COMP
927 /* Hello verify request and/or server hello version may not
928 * match so set first packet if we're negotiating version.
933 n=s->method->ssl_get_message(s,
934 SSL3_ST_CR_SRVR_HELLO_A,
935 SSL3_ST_CR_SRVR_HELLO_B,
940 if (!ok) return((int)n);
945 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
947 if ( s->d1->send_cookie == 0)
949 s->s3->tmp.reuse_message = 1;
952 else /* already sent a cookie */
954 al=SSL_AD_UNEXPECTED_MESSAGE;
955 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
961 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
963 al=SSL_AD_UNEXPECTED_MESSAGE;
964 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
968 d=p=(unsigned char *)s->init_msg;
969 if (s->method->version == DTLS_ANY_VERSION)
971 /* Work out correct protocol version to use */
972 int hversion = (p[0] << 8)|p[1];
973 int options = s->options;
974 if (hversion == DTLS1_2_VERSION
975 && !(options & SSL_OP_NO_DTLSv1_2))
976 s->method = DTLSv1_2_client_method();
977 else if (tls1_suiteb(s))
979 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
980 s->version = hversion;
981 al = SSL_AD_PROTOCOL_VERSION;
984 else if (hversion == DTLS1_VERSION
985 && !(options & SSL_OP_NO_DTLSv1))
986 s->method = DTLSv1_client_method();
989 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
990 s->version = hversion;
991 al = SSL_AD_PROTOCOL_VERSION;
994 s->version = s->client_version = s->method->version;
997 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
999 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
1000 s->version=(s->version&0xff00)|p[1];
1001 al=SSL_AD_PROTOCOL_VERSION;
1006 /* load the server hello data */
1007 /* load the server random */
1008 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
1009 p+=SSL3_RANDOM_SIZE;
1011 /* get the session-id */
1014 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
1016 al=SSL_AD_ILLEGAL_PARAMETER;
1017 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
1021 #ifndef OPENSSL_NO_TLSEXT
1022 /* check if we want to resume the session based on external pre-shared secret */
1023 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1025 SSL_CIPHER *pref_cipher=NULL;
1026 s->session->master_key_length=sizeof(s->session->master_key);
1027 if (s->tls_session_secret_cb(s, s->session->master_key,
1028 &s->session->master_key_length,
1030 s->tls_session_secret_cb_arg))
1032 s->session->cipher = pref_cipher ?
1033 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1036 #endif /* OPENSSL_NO_TLSEXT */
1038 if (j != 0 && j == s->session->session_id_length
1039 && memcmp(p,s->session->session_id,j) == 0)
1041 if(s->sid_ctx_length != s->session->sid_ctx_length
1042 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1044 /* actually a client application bug */
1045 al=SSL_AD_ILLEGAL_PARAMETER;
1046 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1049 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1052 else /* a miss or crap from the other end */
1054 /* If we were trying for session-id reuse, make a new
1055 * SSL_SESSION so we don't stuff up other people */
1057 if (s->session->session_id_length > 0)
1059 if (!ssl_get_new_session(s,0))
1064 s->session->session_id_length=j;
1065 memcpy(s->session->session_id,p,j); /* j could be 0 */
1068 c=ssl_get_cipher_by_char(s,p);
1071 /* unknown cipher */
1072 al=SSL_AD_ILLEGAL_PARAMETER;
1073 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1076 /* If it is a disabled cipher we didn't send it in client hello,
1077 * so return an error.
1079 if (c->algorithm_ssl & ct->mask_ssl ||
1080 c->algorithm_mkey & ct->mask_k ||
1081 c->algorithm_auth & ct->mask_a)
1083 al=SSL_AD_ILLEGAL_PARAMETER;
1084 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1087 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1089 sk=ssl_get_ciphers_by_id(s);
1090 i=sk_SSL_CIPHER_find(sk,c);
1093 /* we did not say we would use this cipher */
1094 al=SSL_AD_ILLEGAL_PARAMETER;
1095 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1099 /* Depending on the session caching (internal/external), the cipher
1100 and/or cipher_id values may not be set. Make sure that
1101 cipher_id is set and use it for comparison. */
1102 if (s->session->cipher)
1103 s->session->cipher_id = s->session->cipher->id;
1104 if (s->hit && (s->session->cipher_id != c->id))
1106 /* Workaround is now obsolete */
1109 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1112 al=SSL_AD_ILLEGAL_PARAMETER;
1113 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1117 s->s3->tmp.new_cipher=c;
1118 /* Don't digest cached records if no sigalgs: we may need them for
1119 * client authentication.
1121 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1123 /* lets get the compression algorithm */
1125 #ifdef OPENSSL_NO_COMP
1128 al=SSL_AD_ILLEGAL_PARAMETER;
1129 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1132 /* If compression is disabled we'd better not try to resume a session
1133 * using compression.
1135 if (s->session->compress_meth != 0)
1137 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1142 if (s->hit && j != s->session->compress_meth)
1144 al=SSL_AD_ILLEGAL_PARAMETER;
1145 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1150 else if (s->options & SSL_OP_NO_COMPRESSION)
1152 al=SSL_AD_ILLEGAL_PARAMETER;
1153 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1157 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1159 if ((j != 0) && (comp == NULL))
1161 al=SSL_AD_ILLEGAL_PARAMETER;
1162 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1167 s->s3->tmp.new_compression=comp;
1171 #ifndef OPENSSL_NO_TLSEXT
1173 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1175 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1182 /* wrong packet length */
1183 al=SSL_AD_DECODE_ERROR;
1184 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1190 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1195 int ssl3_get_server_certificate(SSL *s)
1197 int al,i,ok,ret= -1;
1198 unsigned long n,nc,llen,l;
1200 const unsigned char *q,*p;
1202 STACK_OF(X509) *sk=NULL;
1204 EVP_PKEY *pkey=NULL;
1205 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1207 n=s->method->ssl_get_message(s,
1214 if (!ok) return((int)n);
1216 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1217 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1218 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1220 s->s3->tmp.reuse_message=1;
1224 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1226 al=SSL_AD_UNEXPECTED_MESSAGE;
1227 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1230 p=d=(unsigned char *)s->init_msg;
1232 if ((sk=sk_X509_new_null()) == NULL)
1234 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1241 al=SSL_AD_DECODE_ERROR;
1242 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1245 for (nc=0; nc<llen; )
1248 if ((l+nc+3) > llen)
1250 al=SSL_AD_DECODE_ERROR;
1251 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1256 x=d2i_X509(NULL,&q,l);
1259 al=SSL_AD_BAD_CERTIFICATE;
1260 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1265 al=SSL_AD_DECODE_ERROR;
1266 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1269 if (!sk_X509_push(sk,x))
1271 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1279 i=ssl_verify_cert_chain(s,sk);
1280 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1281 #ifndef OPENSSL_NO_KRB5
1282 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1283 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1284 #endif /* OPENSSL_NO_KRB5 */
1287 al=ssl_verify_alarm_type(s->verify_result);
1288 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1291 ERR_clear_error(); /* but we keep s->verify_result */
1293 sc=ssl_sess_cert_new();
1294 if (sc == NULL) goto err;
1296 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1297 s->session->sess_cert=sc;
1300 /* Inconsistency alert: cert_chain does include the peer's
1301 * certificate, which we don't include in s3_srvr.c */
1302 x=sk_X509_value(sk,0);
1304 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1306 pkey=X509_get_pubkey(x);
1308 /* VRS: allow null cert if auth == KRB5 */
1309 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1310 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1314 printf("pkey,x = %p, %p\n", pkey,x);
1315 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1316 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1317 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1318 #endif /* KSSL_DEBUG */
1320 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1324 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1325 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1329 i=ssl_cert_type(x,pkey);
1330 if (need_cert && i < 0)
1334 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1335 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1341 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1342 if (exp_idx >= 0 && i != exp_idx)
1345 al=SSL_AD_ILLEGAL_PARAMETER;
1346 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1347 SSL_R_WRONG_CERTIFICATE_TYPE);
1350 sc->peer_cert_type=i;
1351 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1352 /* Why would the following ever happen?
1353 * We just created sc a couple of lines ago. */
1354 if (sc->peer_pkeys[i].x509 != NULL)
1355 X509_free(sc->peer_pkeys[i].x509);
1356 sc->peer_pkeys[i].x509=x;
1357 sc->peer_key= &(sc->peer_pkeys[i]);
1359 if (s->session->peer != NULL)
1360 X509_free(s->session->peer);
1361 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1366 sc->peer_cert_type=i;
1369 if (s->session->peer != NULL)
1370 X509_free(s->session->peer);
1371 s->session->peer=NULL;
1373 s->session->verify_result = s->verify_result;
1380 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1383 EVP_PKEY_free(pkey);
1385 sk_X509_pop_free(sk,X509_free);
1389 int ssl3_get_key_exchange(SSL *s)
1391 #ifndef OPENSSL_NO_RSA
1392 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1395 unsigned char *param,*p;
1396 int al,i,j,param_len,ok;
1398 EVP_PKEY *pkey=NULL;
1399 const EVP_MD *md = NULL;
1400 #ifndef OPENSSL_NO_RSA
1403 #ifndef OPENSSL_NO_DH
1406 #ifndef OPENSSL_NO_ECDH
1407 EC_KEY *ecdh = NULL;
1408 BN_CTX *bn_ctx = NULL;
1409 EC_POINT *srvr_ecpoint = NULL;
1411 int encoded_pt_len = 0;
1414 /* use same message size as in ssl3_get_certificate_request()
1415 * as ServerKeyExchange message may be skipped */
1416 n=s->method->ssl_get_message(s,
1417 SSL3_ST_CR_KEY_EXCH_A,
1418 SSL3_ST_CR_KEY_EXCH_B,
1422 if (!ok) return((int)n);
1424 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1426 #ifndef OPENSSL_NO_PSK
1427 /* In plain PSK ciphersuite, ServerKeyExchange can be
1428 omitted if no identity hint is sent. Set
1429 session->sess_cert anyway to avoid problems
1431 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1433 s->session->sess_cert=ssl_sess_cert_new();
1434 if (s->ctx->psk_identity_hint)
1435 OPENSSL_free(s->ctx->psk_identity_hint);
1436 s->ctx->psk_identity_hint = NULL;
1439 s->s3->tmp.reuse_message=1;
1443 param=p=(unsigned char *)s->init_msg;
1444 if (s->session->sess_cert != NULL)
1446 #ifndef OPENSSL_NO_RSA
1447 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1449 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1450 s->session->sess_cert->peer_rsa_tmp=NULL;
1453 #ifndef OPENSSL_NO_DH
1454 if (s->session->sess_cert->peer_dh_tmp)
1456 DH_free(s->session->sess_cert->peer_dh_tmp);
1457 s->session->sess_cert->peer_dh_tmp=NULL;
1460 #ifndef OPENSSL_NO_ECDH
1461 if (s->session->sess_cert->peer_ecdh_tmp)
1463 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1464 s->session->sess_cert->peer_ecdh_tmp=NULL;
1470 s->session->sess_cert=ssl_sess_cert_new();
1474 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1475 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1476 EVP_MD_CTX_init(&md_ctx);
1478 #ifndef OPENSSL_NO_PSK
1479 if (alg_k & SSL_kPSK)
1481 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1483 al=SSL_AD_HANDSHAKE_FAILURE;
1486 /* Store PSK identity hint for later use, hint is used
1487 * in ssl3_send_client_key_exchange. Assume that the
1488 * maximum length of a PSK identity hint can be as
1489 * long as the maximum length of a PSK identity. */
1490 if (i > PSK_MAX_IDENTITY_LEN)
1492 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1493 SSL_R_DATA_LENGTH_TOO_LONG);
1498 al=SSL_AD_DECODE_ERROR;
1499 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1500 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1503 /* If received PSK identity hint contains NULL
1504 * characters, the hint is truncated from the first
1505 * NULL. p may not be ending with NULL, so create a
1506 * NULL-terminated string. */
1507 memcpy(tmp_id_hint, p, i);
1508 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1509 if (s->ctx->psk_identity_hint != NULL)
1510 OPENSSL_free(s->ctx->psk_identity_hint);
1511 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1512 if (s->ctx->psk_identity_hint == NULL)
1514 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1522 #endif /* !OPENSSL_NO_PSK */
1523 #ifndef OPENSSL_NO_SRP
1524 if (alg_k & SSL_kSRP)
1530 al=SSL_AD_DECODE_ERROR;
1531 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1534 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1536 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1545 al=SSL_AD_DECODE_ERROR;
1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1549 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1551 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1556 i = (unsigned int)(p[0]);
1561 al=SSL_AD_DECODE_ERROR;
1562 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1565 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1576 al=SSL_AD_DECODE_ERROR;
1577 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1580 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1582 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1588 /* We must check if there is a certificate */
1589 #ifndef OPENSSL_NO_RSA
1590 if (alg_a & SSL_aRSA)
1591 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1596 #ifndef OPENSSL_NO_DSA
1597 else if (alg_a & SSL_aDSS)
1598 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1602 #endif /* !OPENSSL_NO_SRP */
1603 #ifndef OPENSSL_NO_RSA
1604 if (alg_k & SSL_kRSA)
1606 if ((rsa=RSA_new()) == NULL)
1608 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1615 al=SSL_AD_DECODE_ERROR;
1616 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1619 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1621 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1630 al=SSL_AD_DECODE_ERROR;
1631 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1634 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1636 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1642 /* this should be because we are using an export cipher */
1643 if (alg_a & SSL_aRSA)
1644 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1647 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1650 s->session->sess_cert->peer_rsa_tmp=rsa;
1653 #else /* OPENSSL_NO_RSA */
1657 #ifndef OPENSSL_NO_DH
1658 else if (alg_k & SSL_kEDH)
1660 if ((dh=DH_new()) == NULL)
1662 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1669 al=SSL_AD_DECODE_ERROR;
1670 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1673 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1675 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1684 al=SSL_AD_DECODE_ERROR;
1685 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1688 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1690 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1699 al=SSL_AD_DECODE_ERROR;
1700 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1703 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1705 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1711 #ifndef OPENSSL_NO_RSA
1712 if (alg_a & SSL_aRSA)
1713 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1718 #ifndef OPENSSL_NO_DSA
1719 else if (alg_a & SSL_aDSS)
1720 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1722 /* else anonymous DH, so no certificate or pkey. */
1724 s->session->sess_cert->peer_dh_tmp=dh;
1727 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1729 al=SSL_AD_ILLEGAL_PARAMETER;
1730 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1733 #endif /* !OPENSSL_NO_DH */
1735 #ifndef OPENSSL_NO_ECDH
1736 else if (alg_k & SSL_kEECDH)
1739 const EC_GROUP *group;
1741 if ((ecdh=EC_KEY_new()) == NULL)
1743 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1747 /* Extract elliptic curve parameters and the
1748 * server's ephemeral ECDH public key.
1749 * Keep accumulating lengths of various components in
1750 * param_len and make sure it never exceeds n.
1753 /* XXX: For now we only support named (not generic) curves
1754 * and the ECParameters in this case is just three bytes.
1757 /* Check curve is one of our prefrences, if not server has
1758 * sent an invalid curve.
1760 if (!tls1_check_curve(s, p, param_len))
1762 al=SSL_AD_DECODE_ERROR;
1763 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1767 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1769 al=SSL_AD_INTERNAL_ERROR;
1770 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1774 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1777 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1780 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1782 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1785 EC_GROUP_free(ngroup);
1787 group = EC_KEY_get0_group(ecdh);
1789 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1790 (EC_GROUP_get_degree(group) > 163))
1792 al=SSL_AD_EXPORT_RESTRICTION;
1793 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1799 /* Next, get the encoded ECPoint */
1800 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1801 ((bn_ctx = BN_CTX_new()) == NULL))
1803 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1807 encoded_pt_len = *p; /* length of encoded point */
1809 param_len += (1 + encoded_pt_len);
1810 if ((param_len > n) ||
1811 (EC_POINT_oct2point(group, srvr_ecpoint,
1812 p, encoded_pt_len, bn_ctx) == 0))
1814 al=SSL_AD_DECODE_ERROR;
1815 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1822 /* The ECC/TLS specification does not mention
1823 * the use of DSA to sign ECParameters in the server
1824 * key exchange message. We do support RSA and ECDSA.
1827 #ifndef OPENSSL_NO_RSA
1828 else if (alg_a & SSL_aRSA)
1829 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1831 #ifndef OPENSSL_NO_ECDSA
1832 else if (alg_a & SSL_aECDSA)
1833 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1835 /* else anonymous ECDH, so no certificate or pkey. */
1836 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1837 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1839 BN_CTX_free(bn_ctx);
1841 EC_POINT_free(srvr_ecpoint);
1842 srvr_ecpoint = NULL;
1846 al=SSL_AD_UNEXPECTED_MESSAGE;
1847 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1850 #endif /* !OPENSSL_NO_ECDH */
1853 /* p points to the next byte, there are 'n' bytes left */
1855 /* if it was signed, check the signature */
1858 if (SSL_USE_SIGALGS(s))
1860 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1865 al = SSL_AD_DECODE_ERROR;
1869 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1879 j=EVP_PKEY_size(pkey);
1881 if ((i != n) || (n > j) || (n <= 0))
1883 /* wrong packet length */
1884 al=SSL_AD_DECODE_ERROR;
1885 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1889 #ifndef OPENSSL_NO_RSA
1890 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1896 for (num=2; num > 0; num--)
1898 EVP_MD_CTX_set_flags(&md_ctx,
1899 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1900 EVP_DigestInit_ex(&md_ctx,(num == 2)
1901 ?s->ctx->md5:s->ctx->sha1, NULL);
1902 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1903 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1904 EVP_DigestUpdate(&md_ctx,param,param_len);
1905 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1909 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1913 al=SSL_AD_DECRYPT_ERROR;
1914 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1920 al=SSL_AD_DECRYPT_ERROR;
1921 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1928 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1929 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1930 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1931 EVP_VerifyUpdate(&md_ctx,param,param_len);
1932 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1935 al=SSL_AD_DECRYPT_ERROR;
1936 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1943 /* aNULL or kPSK do not need public keys */
1944 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1946 /* Might be wrong key type, check it */
1947 if (ssl3_check_cert_and_algorithm(s))
1948 /* Otherwise this shouldn't happen */
1949 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1952 /* still data left over */
1955 al=SSL_AD_DECODE_ERROR;
1956 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1960 EVP_PKEY_free(pkey);
1961 EVP_MD_CTX_cleanup(&md_ctx);
1964 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1966 EVP_PKEY_free(pkey);
1967 #ifndef OPENSSL_NO_RSA
1971 #ifndef OPENSSL_NO_DH
1975 #ifndef OPENSSL_NO_ECDH
1976 BN_CTX_free(bn_ctx);
1977 EC_POINT_free(srvr_ecpoint);
1981 EVP_MD_CTX_cleanup(&md_ctx);
1985 int ssl3_get_certificate_request(SSL *s)
1988 unsigned long n,nc,l;
1989 unsigned int llen, ctype_num,i;
1991 const unsigned char *p,*q;
1993 STACK_OF(X509_NAME) *ca_sk=NULL;
1995 n=s->method->ssl_get_message(s,
1996 SSL3_ST_CR_CERT_REQ_A,
1997 SSL3_ST_CR_CERT_REQ_B,
2002 if (!ok) return((int)n);
2004 s->s3->tmp.cert_req=0;
2006 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2008 s->s3->tmp.reuse_message=1;
2009 /* If we get here we don't need any cached handshake records
2010 * as we wont be doing client auth.
2012 if (s->s3->handshake_buffer)
2014 if (!ssl3_digest_cached_records(s))
2020 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2022 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2023 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2027 /* TLS does not like anon-DH with client cert */
2028 if (s->version > SSL3_VERSION)
2030 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2032 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2033 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2038 p=d=(unsigned char *)s->init_msg;
2040 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2042 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2046 /* get the certificate types */
2048 if (s->cert->ctypes)
2050 OPENSSL_free(s->cert->ctypes);
2051 s->cert->ctypes = NULL;
2053 if (ctype_num > SSL3_CT_NUMBER)
2055 /* If we exceed static buffer copy all to cert structure */
2056 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2057 memcpy(s->cert->ctypes, p, ctype_num);
2058 s->cert->ctype_num = (size_t)ctype_num;
2059 ctype_num=SSL3_CT_NUMBER;
2061 for (i=0; i<ctype_num; i++)
2062 s->s3->tmp.ctype[i]= p[i];
2064 if (SSL_USE_SIGALGS(s))
2067 /* Check we have enough room for signature algorithms and
2068 * following length value.
2070 if ((unsigned long)(p - d + llen + 2) > n)
2072 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2073 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2076 /* Clear certificate digests and validity flags */
2077 for (i = 0; i < SSL_PKEY_NUM; i++)
2079 s->cert->pkeys[i].digest = NULL;
2080 s->cert->pkeys[i].valid_flags = 0;
2082 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2084 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2085 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2091 /* get the CA RDNs */
2096 out=fopen("/tmp/vsign.der","w");
2097 fwrite(p,1,llen,out);
2102 if ((unsigned long)(p - d + llen) != n)
2104 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2105 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2109 for (nc=0; nc<llen; )
2112 if ((l+nc+2) > llen)
2114 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2115 goto cont; /* netscape bugs */
2116 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2117 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2123 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2125 /* If netscape tolerance is on, ignore errors */
2126 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2130 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2131 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2138 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2139 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2142 if (!sk_X509_NAME_push(ca_sk,xn))
2144 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2158 /* we should setup a certificate to return.... */
2159 s->s3->tmp.cert_req=1;
2160 s->s3->tmp.ctype_num=ctype_num;
2161 if (s->s3->tmp.ca_names != NULL)
2162 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2163 s->s3->tmp.ca_names=ca_sk;
2168 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2172 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2174 return(X509_NAME_cmp(*a,*b));
2176 #ifndef OPENSSL_NO_TLSEXT
2177 int ssl3_get_new_session_ticket(SSL *s)
2179 int ok,al,ret=0, ticklen;
2181 const unsigned char *p;
2184 n=s->method->ssl_get_message(s,
2185 SSL3_ST_CR_SESSION_TICKET_A,
2186 SSL3_ST_CR_SESSION_TICKET_B,
2194 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2196 s->s3->tmp.reuse_message=1;
2199 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2201 al=SSL_AD_UNEXPECTED_MESSAGE;
2202 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2207 /* need at least ticket_lifetime_hint + ticket length */
2208 al = SSL_AD_DECODE_ERROR;
2209 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2213 p=d=(unsigned char *)s->init_msg;
2214 n2l(p, s->session->tlsext_tick_lifetime_hint);
2216 /* ticket_lifetime_hint + ticket_length + ticket */
2217 if (ticklen + 6 != n)
2219 al = SSL_AD_DECODE_ERROR;
2220 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2223 if (s->session->tlsext_tick)
2225 OPENSSL_free(s->session->tlsext_tick);
2226 s->session->tlsext_ticklen = 0;
2228 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2229 if (!s->session->tlsext_tick)
2231 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2234 memcpy(s->session->tlsext_tick, p, ticklen);
2235 s->session->tlsext_ticklen = ticklen;
2236 /* There are two ways to detect a resumed ticket sesion.
2237 * One is to set an appropriate session ID and then the server
2238 * must return a match in ServerHello. This allows the normal
2239 * client session ID matching to work and we know much
2240 * earlier that the ticket has been accepted.
2242 * The other way is to set zero length session ID when the
2243 * ticket is presented and rely on the handshake to determine
2244 * session resumption.
2246 * We choose the former approach because this fits in with
2247 * assumptions elsewhere in OpenSSL. The session ID is set
2248 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2251 EVP_Digest(p, ticklen,
2252 s->session->session_id, &s->session->session_id_length,
2253 #ifndef OPENSSL_NO_SHA256
2254 EVP_sha256(), NULL);
2261 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2266 int ssl3_get_cert_status(SSL *s)
2269 unsigned long resplen,n;
2270 const unsigned char *p;
2272 n=s->method->ssl_get_message(s,
2273 SSL3_ST_CR_CERT_STATUS_A,
2274 SSL3_ST_CR_CERT_STATUS_B,
2275 SSL3_MT_CERTIFICATE_STATUS,
2279 if (!ok) return((int)n);
2282 /* need at least status type + length */
2283 al = SSL_AD_DECODE_ERROR;
2284 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2287 p = (unsigned char *)s->init_msg;
2288 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2290 al = SSL_AD_DECODE_ERROR;
2291 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2295 if (resplen + 4 != n)
2297 al = SSL_AD_DECODE_ERROR;
2298 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2301 if (s->tlsext_ocsp_resp)
2302 OPENSSL_free(s->tlsext_ocsp_resp);
2303 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2304 if (!s->tlsext_ocsp_resp)
2306 al = SSL_AD_INTERNAL_ERROR;
2307 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2310 s->tlsext_ocsp_resplen = resplen;
2311 if (s->ctx->tlsext_status_cb)
2314 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2317 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2318 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2323 al = SSL_AD_INTERNAL_ERROR;
2324 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2330 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2335 int ssl3_get_server_done(SSL *s)
2340 n=s->method->ssl_get_message(s,
2341 SSL3_ST_CR_SRVR_DONE_A,
2342 SSL3_ST_CR_SRVR_DONE_B,
2343 SSL3_MT_SERVER_DONE,
2344 30, /* should be very small, like 0 :-) */
2347 if (!ok) return((int)n);
2350 /* should contain no data */
2351 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2352 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2360 int ssl3_send_client_key_exchange(SSL *s)
2364 unsigned long alg_k;
2365 #ifndef OPENSSL_NO_RSA
2367 EVP_PKEY *pkey=NULL;
2369 #ifndef OPENSSL_NO_KRB5
2371 #endif /* OPENSSL_NO_KRB5 */
2372 #ifndef OPENSSL_NO_ECDH
2373 EC_KEY *clnt_ecdh = NULL;
2374 const EC_POINT *srvr_ecpoint = NULL;
2375 EVP_PKEY *srvr_pub_pkey = NULL;
2376 unsigned char *encodedPoint = NULL;
2377 int encoded_pt_len = 0;
2378 BN_CTX * bn_ctx = NULL;
2381 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2383 p = ssl_handshake_start(s);
2385 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2387 /* Fool emacs indentation */
2389 #ifndef OPENSSL_NO_RSA
2390 else if (alg_k & SSL_kRSA)
2393 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2395 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2396 rsa=s->session->sess_cert->peer_rsa_tmp;
2399 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2400 if ((pkey == NULL) ||
2401 (pkey->type != EVP_PKEY_RSA) ||
2402 (pkey->pkey.rsa == NULL))
2404 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2408 EVP_PKEY_free(pkey);
2411 tmp_buf[0]=s->client_version>>8;
2412 tmp_buf[1]=s->client_version&0xff;
2413 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2416 s->session->master_key_length=sizeof tmp_buf;
2419 /* Fix buf for TLS and beyond */
2420 if (s->version > SSL3_VERSION)
2422 n=RSA_public_encrypt(sizeof tmp_buf,
2423 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2425 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2426 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2430 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2434 /* Fix buf for TLS and beyond */
2435 if (s->version > SSL3_VERSION)
2441 s->session->master_key_length=
2442 s->method->ssl3_enc->generate_master_secret(s,
2443 s->session->master_key,
2444 tmp_buf,sizeof tmp_buf);
2445 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2448 #ifndef OPENSSL_NO_KRB5
2449 else if (alg_k & SSL_kKRB5)
2451 krb5_error_code krb5rc;
2452 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2453 /* krb5_data krb5_ap_req; */
2454 krb5_data *enc_ticket;
2455 krb5_data authenticator, *authp = NULL;
2456 EVP_CIPHER_CTX ciph_ctx;
2457 const EVP_CIPHER *enc = NULL;
2458 unsigned char iv[EVP_MAX_IV_LENGTH];
2459 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2460 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2461 + EVP_MAX_IV_LENGTH];
2462 int padl, outl = sizeof(epms);
2464 EVP_CIPHER_CTX_init(&ciph_ctx);
2467 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2469 #endif /* KSSL_DEBUG */
2473 if (KRB5SENDAUTH) authp = &authenticator;
2474 #endif /* KRB5SENDAUTH */
2476 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2478 enc = kssl_map_enc(kssl_ctx->enctype);
2483 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2484 if (krb5rc && kssl_err.text)
2485 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2487 #endif /* KSSL_DEBUG */
2491 ssl3_send_alert(s,SSL3_AL_FATAL,
2492 SSL_AD_HANDSHAKE_FAILURE);
2493 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2498 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2499 ** in place of RFC 2712 KerberosWrapper, as in:
2501 ** Send ticket (copy to *p, set n = length)
2502 ** n = krb5_ap_req.length;
2503 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2504 ** if (krb5_ap_req.data)
2505 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2507 ** Now using real RFC 2712 KerberosWrapper
2508 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2509 ** Note: 2712 "opaque" types are here replaced
2510 ** with a 2-byte length followed by the value.
2512 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2513 ** Where "xx xx" = length bytes. Shown here with
2514 ** optional authenticator omitted.
2517 /* KerberosWrapper.Ticket */
2518 s2n(enc_ticket->length,p);
2519 memcpy(p, enc_ticket->data, enc_ticket->length);
2520 p+= enc_ticket->length;
2521 n = enc_ticket->length + 2;
2523 /* KerberosWrapper.Authenticator */
2524 if (authp && authp->length)
2526 s2n(authp->length,p);
2527 memcpy(p, authp->data, authp->length);
2529 n+= authp->length + 2;
2537 s2n(0,p);/* null authenticator length */
2541 tmp_buf[0]=s->client_version>>8;
2542 tmp_buf[1]=s->client_version&0xff;
2543 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2546 /* 20010420 VRS. Tried it this way; failed.
2547 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2548 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2549 ** kssl_ctx->length);
2550 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2553 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2554 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2556 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2558 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2560 if (outl > (int)sizeof epms)
2562 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2565 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2567 /* KerberosWrapper.EncryptedPreMasterSecret */
2569 memcpy(p, epms, outl);
2573 s->session->master_key_length=
2574 s->method->ssl3_enc->generate_master_secret(s,
2575 s->session->master_key,
2576 tmp_buf, sizeof tmp_buf);
2578 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2579 OPENSSL_cleanse(epms, outl);
2582 #ifndef OPENSSL_NO_DH
2583 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2585 DH *dh_srvr,*dh_clnt;
2586 SESS_CERT *scert = s->session->sess_cert;
2590 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2591 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2595 if (scert->peer_dh_tmp != NULL)
2596 dh_srvr=scert->peer_dh_tmp;
2599 /* we get them from the cert */
2600 int idx = scert->peer_cert_type;
2601 EVP_PKEY *spkey = NULL;
2604 spkey = X509_get_pubkey(
2605 scert->peer_pkeys[idx].x509);
2608 dh_srvr = EVP_PKEY_get1_DH(spkey);
2609 EVP_PKEY_free(spkey);
2611 if (dh_srvr == NULL)
2613 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2614 ERR_R_INTERNAL_ERROR);
2618 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2620 /* Use client certificate key */
2621 EVP_PKEY *clkey = s->cert->key->privatekey;
2624 dh_clnt = EVP_PKEY_get1_DH(clkey);
2625 if (dh_clnt == NULL)
2627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2628 ERR_R_INTERNAL_ERROR);
2634 /* generate a new random key */
2635 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2637 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2640 if (!DH_generate_key(dh_clnt))
2642 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2648 /* use the 'p' output buffer for the DH key, but
2649 * make sure to clear it out afterwards */
2651 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2652 if (scert->peer_dh_tmp == NULL)
2657 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2662 /* generate master key from the result */
2663 s->session->master_key_length=
2664 s->method->ssl3_enc->generate_master_secret(s,
2665 s->session->master_key,p,n);
2669 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2673 /* send off the data */
2674 n=BN_num_bytes(dh_clnt->pub_key);
2676 BN_bn2bin(dh_clnt->pub_key,p);
2682 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2686 #ifndef OPENSSL_NO_ECDH
2687 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2689 const EC_GROUP *srvr_group = NULL;
2691 int ecdh_clnt_cert = 0;
2694 if (s->session->sess_cert == NULL)
2696 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2697 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2701 /* Did we send out the client's
2702 * ECDH share for use in premaster
2703 * computation as part of client certificate?
2704 * If so, set ecdh_clnt_cert to 1.
2706 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2708 /* XXX: For now, we do not support client
2709 * authentication using ECDH certificates.
2710 * To add such support, one needs to add
2711 * code that checks for appropriate
2712 * conditions and sets ecdh_clnt_cert to 1.
2713 * For example, the cert have an ECC
2714 * key on the same curve as the server's
2715 * and the key should be authorized for
2718 * One also needs to add code in ssl3_connect
2719 * to skip sending the certificate verify
2722 * if ((s->cert->key->privatekey != NULL) &&
2723 * (s->cert->key->privatekey->type ==
2724 * EVP_PKEY_EC) && ...)
2725 * ecdh_clnt_cert = 1;
2729 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2731 tkey = s->session->sess_cert->peer_ecdh_tmp;
2735 /* Get the Server Public Key from Cert */
2736 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2737 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2738 if ((srvr_pub_pkey == NULL) ||
2739 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2740 (srvr_pub_pkey->pkey.ec == NULL))
2742 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2743 ERR_R_INTERNAL_ERROR);
2747 tkey = srvr_pub_pkey->pkey.ec;
2750 srvr_group = EC_KEY_get0_group(tkey);
2751 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2753 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2755 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2756 ERR_R_INTERNAL_ERROR);
2760 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2762 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2766 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2768 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2773 /* Reuse key info from our certificate
2774 * We only need our private key to perform
2775 * the ECDH computation.
2777 const BIGNUM *priv_key;
2778 tkey = s->cert->key->privatekey->pkey.ec;
2779 priv_key = EC_KEY_get0_private_key(tkey);
2780 if (priv_key == NULL)
2782 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2785 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2787 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2793 /* Generate a new ECDH key pair */
2794 if (!(EC_KEY_generate_key(clnt_ecdh)))
2796 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2801 /* use the 'p' output buffer for the ECDH key, but
2802 * make sure to clear it out afterwards
2805 field_size = EC_GROUP_get_degree(srvr_group);
2806 if (field_size <= 0)
2808 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2812 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2815 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2820 /* generate master key from the result */
2821 s->session->master_key_length = s->method->ssl3_enc \
2822 -> generate_master_secret(s,
2823 s->session->master_key,
2826 memset(p, 0, n); /* clean up */
2830 /* Send empty client key exch message */
2835 /* First check the size of encoding and
2836 * allocate memory accordingly.
2839 EC_POINT_point2oct(srvr_group,
2840 EC_KEY_get0_public_key(clnt_ecdh),
2841 POINT_CONVERSION_UNCOMPRESSED,
2844 encodedPoint = (unsigned char *)
2845 OPENSSL_malloc(encoded_pt_len *
2846 sizeof(unsigned char));
2847 bn_ctx = BN_CTX_new();
2848 if ((encodedPoint == NULL) ||
2851 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2855 /* Encode the public key */
2856 n = EC_POINT_point2oct(srvr_group,
2857 EC_KEY_get0_public_key(clnt_ecdh),
2858 POINT_CONVERSION_UNCOMPRESSED,
2859 encodedPoint, encoded_pt_len, bn_ctx);
2861 *p = n; /* length of encoded point */
2862 /* Encoded point will be copied here */
2864 /* copy the point */
2865 memcpy((unsigned char *)p, encodedPoint, n);
2866 /* increment n to account for length field */
2870 /* Free allocated memory */
2871 BN_CTX_free(bn_ctx);
2872 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2873 if (clnt_ecdh != NULL)
2874 EC_KEY_free(clnt_ecdh);
2875 EVP_PKEY_free(srvr_pub_pkey);
2877 #endif /* !OPENSSL_NO_ECDH */
2878 else if (alg_k & SSL_kGOST)
2880 /* GOST key exchange message creation */
2881 EVP_PKEY_CTX *pkey_ctx;
2884 unsigned int md_len;
2886 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2887 EVP_MD_CTX *ukm_hash;
2890 /* Get server sertificate PKEY and create ctx from it */
2891 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2893 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2895 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2899 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2900 /* If we have send a certificate, and certificate key
2902 * parameters match those of server certificate, use
2903 * certificate key for key exchange
2906 /* Otherwise, generate ephemeral key pair */
2908 EVP_PKEY_encrypt_init(pkey_ctx);
2909 /* Generate session key */
2910 RAND_bytes(premaster_secret,32);
2911 /* If we have client certificate, use its secret as peer key */
2912 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2913 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2914 /* If there was an error - just ignore it. Ephemeral key
2920 /* Compute shared IV and store it in algorithm-specific
2922 ukm_hash = EVP_MD_CTX_create();
2923 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2924 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2925 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2926 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2927 EVP_MD_CTX_destroy(ukm_hash);
2928 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2930 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2934 /* Make GOST keytransport blob message */
2935 /*Encapsulate it into sequence */
2936 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2938 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2939 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2946 *(p++)= msglen & 0xff;
2951 *(p++)= msglen & 0xff;
2954 memcpy(p, tmp, msglen);
2955 /* Check if pubkey from client certificate was used */
2956 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2958 /* Set flag "skip certificate verify" */
2959 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2961 EVP_PKEY_CTX_free(pkey_ctx);
2962 s->session->master_key_length=
2963 s->method->ssl3_enc->generate_master_secret(s,
2964 s->session->master_key,premaster_secret,32);
2965 EVP_PKEY_free(pub_key);
2968 #ifndef OPENSSL_NO_SRP
2969 else if (alg_k & SSL_kSRP)
2971 if (s->srp_ctx.A != NULL)
2973 /* send off the data */
2974 n=BN_num_bytes(s->srp_ctx.A);
2976 BN_bn2bin(s->srp_ctx.A,p);
2981 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2984 if (s->session->srp_username != NULL)
2985 OPENSSL_free(s->session->srp_username);
2986 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2987 if (s->session->srp_username == NULL)
2989 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2990 ERR_R_MALLOC_FAILURE);
2994 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2996 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3001 #ifndef OPENSSL_NO_PSK
3002 else if (alg_k & SSL_kPSK)
3004 char identity[PSK_MAX_IDENTITY_LEN];
3005 unsigned char *t = NULL;
3006 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3007 unsigned int pre_ms_len = 0, psk_len = 0;
3011 if (s->psk_client_callback == NULL)
3013 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3014 SSL_R_PSK_NO_CLIENT_CB);
3018 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3019 identity, PSK_MAX_IDENTITY_LEN,
3020 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3021 if (psk_len > PSK_MAX_PSK_LEN)
3023 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3024 ERR_R_INTERNAL_ERROR);
3027 else if (psk_len == 0)
3029 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3030 SSL_R_PSK_IDENTITY_NOT_FOUND);
3034 /* create PSK pre_master_secret */
3035 pre_ms_len = 2+psk_len+2+psk_len;
3037 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3039 memset(t, 0, psk_len);
3043 if (s->session->psk_identity_hint != NULL)
3044 OPENSSL_free(s->session->psk_identity_hint);
3045 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3046 if (s->ctx->psk_identity_hint != NULL &&
3047 s->session->psk_identity_hint == NULL)
3049 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3050 ERR_R_MALLOC_FAILURE);
3054 if (s->session->psk_identity != NULL)
3055 OPENSSL_free(s->session->psk_identity);
3056 s->session->psk_identity = BUF_strdup(identity);
3057 if (s->session->psk_identity == NULL)
3059 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3060 ERR_R_MALLOC_FAILURE);
3064 s->session->master_key_length =
3065 s->method->ssl3_enc->generate_master_secret(s,
3066 s->session->master_key,
3067 psk_or_pre_ms, pre_ms_len);
3068 n = strlen(identity);
3070 memcpy(p, identity, n);
3074 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
3075 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3078 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3085 ssl3_send_alert(s, SSL3_AL_FATAL,
3086 SSL_AD_HANDSHAKE_FAILURE);
3087 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3088 ERR_R_INTERNAL_ERROR);
3092 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3093 s->state=SSL3_ST_CW_KEY_EXCH_B;
3096 /* SSL3_ST_CW_KEY_EXCH_B */
3097 return ssl_do_write(s);
3099 #ifndef OPENSSL_NO_ECDH
3100 BN_CTX_free(bn_ctx);
3101 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3102 if (clnt_ecdh != NULL)
3103 EC_KEY_free(clnt_ecdh);
3104 EVP_PKEY_free(srvr_pub_pkey);
3109 int ssl3_send_client_verify(SSL *s)
3112 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3114 EVP_PKEY_CTX *pctx=NULL;
3120 EVP_MD_CTX_init(&mctx);
3122 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3124 p= ssl_handshake_start(s);
3125 pkey=s->cert->key->privatekey;
3126 /* Create context from key and test if sha1 is allowed as digest */
3127 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3128 EVP_PKEY_sign_init(pctx);
3129 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3131 if (!SSL_USE_SIGALGS(s))
3132 s->method->ssl3_enc->cert_verify_mac(s,
3134 &(data[MD5_DIGEST_LENGTH]));
3140 /* For TLS v1.2 send signature algorithm and signature
3141 * using agreed digest and cached handshake records.
3143 if (SSL_USE_SIGALGS(s))
3147 const EVP_MD *md = s->cert->key->digest;
3148 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3150 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3152 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3153 ERR_R_INTERNAL_ERROR);
3158 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3161 if (!EVP_SignInit_ex(&mctx, md, NULL)
3162 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3163 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3165 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3171 if (!ssl3_digest_cached_records(s))
3175 #ifndef OPENSSL_NO_RSA
3176 if (pkey->type == EVP_PKEY_RSA)
3178 s->method->ssl3_enc->cert_verify_mac(s,
3181 if (RSA_sign(NID_md5_sha1, data,
3182 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3183 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3185 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3193 #ifndef OPENSSL_NO_DSA
3194 if (pkey->type == EVP_PKEY_DSA)
3196 if (!DSA_sign(pkey->save_type,
3197 &(data[MD5_DIGEST_LENGTH]),
3198 SHA_DIGEST_LENGTH,&(p[2]),
3199 (unsigned int *)&j,pkey->pkey.dsa))
3201 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3209 #ifndef OPENSSL_NO_ECDSA
3210 if (pkey->type == EVP_PKEY_EC)
3212 if (!ECDSA_sign(pkey->save_type,
3213 &(data[MD5_DIGEST_LENGTH]),
3214 SHA_DIGEST_LENGTH,&(p[2]),
3215 (unsigned int *)&j,pkey->pkey.ec))
3217 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3226 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3228 unsigned char signbuf[64];
3231 s->method->ssl3_enc->cert_verify_mac(s,
3232 NID_id_GostR3411_94,
3234 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3235 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3236 ERR_R_INTERNAL_ERROR);
3239 for (i=63,j=0; i>=0; j++, i--) {
3247 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3250 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3251 s->state=SSL3_ST_CW_CERT_VRFY_B;
3253 EVP_MD_CTX_cleanup(&mctx);
3254 EVP_PKEY_CTX_free(pctx);
3255 return ssl_do_write(s);
3257 EVP_MD_CTX_cleanup(&mctx);
3258 EVP_PKEY_CTX_free(pctx);
3262 /* Check a certificate can be used for client authentication. Currently
3263 * check cert exists, if we have a suitable digest for TLS 1.2 if
3264 * static DH client certificates can be used and optionally checks
3265 * suitability for Suite B.
3267 static int ssl3_check_client_certificate(SSL *s)
3269 unsigned long alg_k;
3270 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3272 /* If no suitable signature algorithm can't use certificate */
3273 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3275 /* If strict mode check suitability of chain before using it.
3276 * This also adjusts suite B digest if necessary.
3278 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3279 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3281 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3282 /* See if we can use client certificate for fixed DH */
3283 if (alg_k & (SSL_kDHr|SSL_kDHd))
3285 SESS_CERT *scert = s->session->sess_cert;
3286 int i = scert->peer_cert_type;
3287 EVP_PKEY *clkey = NULL, *spkey = NULL;
3288 clkey = s->cert->key->privatekey;
3289 /* If client key not DH assume it can be used */
3290 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3293 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3296 /* Compare server and client parameters */
3297 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3298 EVP_PKEY_free(spkey);
3302 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3307 int ssl3_send_client_certificate(SSL *s)
3310 EVP_PKEY *pkey=NULL;
3313 if (s->state == SSL3_ST_CW_CERT_A)
3315 /* Let cert callback update client certificates if required */
3316 if (s->cert->cert_cb)
3318 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3321 s->rwstate=SSL_X509_LOOKUP;
3326 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3329 s->rwstate=SSL_NOTHING;
3331 if (ssl3_check_client_certificate(s))
3332 s->state=SSL3_ST_CW_CERT_C;
3334 s->state=SSL3_ST_CW_CERT_B;
3337 /* We need to get a client cert */
3338 if (s->state == SSL3_ST_CW_CERT_B)
3340 /* If we get an error, we need to
3341 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3342 * We then get retied later */
3344 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3347 s->rwstate=SSL_X509_LOOKUP;
3350 s->rwstate=SSL_NOTHING;
3351 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3353 s->state=SSL3_ST_CW_CERT_B;
3354 if ( !SSL_use_certificate(s,x509) ||
3355 !SSL_use_PrivateKey(s,pkey))
3361 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3364 if (x509 != NULL) X509_free(x509);
3365 if (pkey != NULL) EVP_PKEY_free(pkey);
3366 if (i && !ssl3_check_client_certificate(s))
3370 if (s->version == SSL3_VERSION)
3372 s->s3->tmp.cert_req=0;
3373 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3378 s->s3->tmp.cert_req=2;
3382 /* Ok, we have a cert */
3383 s->state=SSL3_ST_CW_CERT_C;
3386 if (s->state == SSL3_ST_CW_CERT_C)
3388 s->state=SSL3_ST_CW_CERT_D;
3389 ssl3_output_cert_chain(s,
3390 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3392 /* SSL3_ST_CW_CERT_D */
3393 return ssl_do_write(s);
3396 #define has_bits(i,m) (((i)&(m)) == (m))
3398 int ssl3_check_cert_and_algorithm(SSL *s)
3402 EVP_PKEY *pkey=NULL;
3404 #ifndef OPENSSL_NO_RSA
3407 #ifndef OPENSSL_NO_DH
3411 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3412 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3414 /* we don't have a certificate */
3415 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3418 sc=s->session->sess_cert;
3421 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3425 #ifndef OPENSSL_NO_RSA
3426 rsa=s->session->sess_cert->peer_rsa_tmp;
3428 #ifndef OPENSSL_NO_DH
3429 dh=s->session->sess_cert->peer_dh_tmp;
3432 /* This is the passed certificate */
3434 idx=sc->peer_cert_type;
3435 #ifndef OPENSSL_NO_ECDH
3436 if (idx == SSL_PKEY_ECC)
3438 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3440 { /* check failed */
3441 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3449 else if (alg_a & SSL_aECDSA)
3451 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3454 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3456 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3460 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3461 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3462 EVP_PKEY_free(pkey);
3465 /* Check that we have a certificate if we require one */
3466 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3468 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3471 #ifndef OPENSSL_NO_DSA
3472 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3474 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3478 #ifndef OPENSSL_NO_RSA
3479 if ((alg_k & SSL_kRSA) &&
3480 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3482 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3486 #ifndef OPENSSL_NO_DH
3487 if ((alg_k & SSL_kEDH) &&
3488 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3490 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3493 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3494 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3496 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3499 #ifndef OPENSSL_NO_DSA
3500 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3501 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3503 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3509 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3511 #ifndef OPENSSL_NO_RSA
3512 if (alg_k & SSL_kRSA)
3515 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3517 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3523 #ifndef OPENSSL_NO_DH
3524 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3527 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3529 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3536 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3542 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3547 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3548 int ssl3_send_next_proto(SSL *s)
3550 unsigned int len, padding_len;
3553 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3555 len = s->next_proto_negotiated_len;
3556 padding_len = 32 - ((len + 2) % 32);
3557 d = (unsigned char *)s->init_buf->data;
3559 memcpy(d + 5, s->next_proto_negotiated, len);
3560 d[5 + len] = padding_len;
3561 memset(d + 6 + len, 0, padding_len);
3562 *(d++)=SSL3_MT_NEXT_PROTO;
3563 l2n3(2 + len + padding_len, d);
3564 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3565 s->init_num = 4 + 2 + len + padding_len;
3569 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3571 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3573 /* Check to see if handshake is full or resumed. Usually this is just a
3574 * case of checking to see if a cache hit has occurred. In the case of
3575 * session tickets we have to check the next message to be sure.
3578 #ifndef OPENSSL_NO_TLSEXT
3579 int ssl3_check_finished(SSL *s)
3584 /* Read the message to see if it is supplemental data,
3585 * regardless if there is a session ticket this function is
3586 * called when we really expect a Certificate message, so
3587 * permit appropriate message length */
3588 n=s->method->ssl_get_message(s,
3594 if (!ok) return((int)n);
3595 s->s3->tmp.reuse_message = 1;
3597 if (s->s3->tmp.message_type == SSL3_MT_SUPPLEMENTAL_DATA)
3599 /* If we have no ticket it cannot be a resumed session. */
3600 if (!s->session->tlsext_tick)
3602 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3603 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3610 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3613 #ifndef OPENSSL_NO_ENGINE
3614 if (s->ctx->client_cert_engine)
3616 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3617 SSL_get_client_CA_list(s),
3618 px509, ppkey, NULL, NULL, NULL);
3623 if (s->ctx->client_cert_cb)
3624 i = s->ctx->client_cert_cb(s,px509,ppkey);
3628 #ifndef OPENSSL_NO_TLSEXT
3629 int tls1_send_client_supplemental_data(SSL *s, int *skip)
3632 if (s->ctx->cli_supp_data_records_count)
3634 unsigned char *p = NULL;
3635 unsigned char *size_loc = NULL;
3636 cli_supp_data_record *record = NULL;
3640 for (i = 0; i < s->ctx->cli_supp_data_records_count; i++)
3642 const unsigned char *out = NULL;
3643 unsigned short outlen = 0;
3645 record = &s->ctx->cli_supp_data_records[i];
3647 /* NULL callback or -1 omits supp data entry*/
3650 cb_retval = record->fn2(s, record->supp_data_type,
3653 if (cb_retval == -1)
3654 continue; /* skip this supp data entry */
3657 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3660 if (outlen == 0 || TLSEXT_MAXLEN_supplemental_data < outlen + 4 + length)
3662 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3665 /* if first entry, write handshake message type */
3668 if (!BUF_MEM_grow_clean(s->init_buf, 4))
3670 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3673 p = (unsigned char *)s->init_buf->data;
3674 *(p++) = SSL3_MT_SUPPLEMENTAL_DATA;
3675 /* update message length when all
3676 * callbacks complete */
3678 /* skip over handshake length field (3
3679 * bytes) and supp_data length field
3684 if (!BUF_MEM_grow(s->init_buf, outlen + 4))
3686 SSLerr(SSL_F_TLS1_SEND_CLIENT_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB);
3689 s2n(record->supp_data_type, p);
3691 memcpy(p, out, outlen);
3692 length += (outlen + 4);
3697 /* write handshake length */
3698 l2n3(length - 4, size_loc);
3699 /* supp_data length */
3700 l2n3(length - 7, size_loc);
3701 s->state = SSL3_ST_CW_SUPPLEMENTAL_DATA_B;
3702 s->init_num = length;
3704 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3708 /* no supp data message sent */
3715 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3719 int tls1_get_server_supplemental_data(SSL *s)
3724 const unsigned char *p, *d;
3725 unsigned short supp_data_entry_type = 0;
3726 unsigned short supp_data_entry_len = 0;
3727 unsigned long supp_data_len = 0;
3731 n=s->method->ssl_get_message(s,
3732 SSL3_ST_CR_SUPPLEMENTAL_DATA_A,
3733 SSL3_ST_CR_SUPPLEMENTAL_DATA_B,
3734 SSL3_MT_SUPPLEMENTAL_DATA,
3735 /* use default limit */
3736 TLSEXT_MAXLEN_supplemental_data,
3739 if (!ok) return((int)n);
3741 p = (unsigned char *)s->init_msg;
3743 /* The message cannot be empty */
3746 al = SSL_AD_DECODE_ERROR;
3747 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA,SSL_R_LENGTH_MISMATCH);
3750 n2l3(p, supp_data_len);
3751 while (p < d+supp_data_len)
3753 n2s(p, supp_data_entry_type);
3754 n2s(p, supp_data_entry_len);
3755 /* if there is a callback for this supp data type, send it */
3756 for (i=0; i < s->ctx->cli_supp_data_records_count; i++)
3758 if (s->ctx->cli_supp_data_records[i].supp_data_type == supp_data_entry_type &&
3759 s->ctx->cli_supp_data_records[i].fn1)
3761 cb_retval = s->ctx->cli_supp_data_records[i].fn1(s, supp_data_entry_type, p,
3762 supp_data_entry_len, &al,
3763 s->ctx->cli_supp_data_records[i].arg);
3766 SSLerr(SSL_F_TLS1_GET_SERVER_SUPPLEMENTAL_DATA, ERR_R_SSL_LIB);
3771 p += supp_data_entry_len;
3775 ssl3_send_alert(s,SSL3_AL_FATAL,al);