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 int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172 #ifndef OPENSSL_NO_SSL3_METHOD
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)
187 int ssl3_connect(SSL *s)
190 unsigned long Time=(unsigned long)time(NULL);
191 void (*cb)(const SSL *ssl,int type,int val)=NULL;
193 int new_state,state,skip=0;
195 RAND_add(&Time,sizeof(Time),0);
199 if (s->info_callback != NULL)
201 else if (s->ctx->info_callback != NULL)
202 cb=s->ctx->info_callback;
205 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
207 #ifndef OPENSSL_NO_HEARTBEATS
208 /* If we're awaiting a HeartbeatResponse, pretend we
209 * already got and don't await it anymore, because
210 * Heartbeats don't make sense during handshakes anyway.
212 if (s->tlsext_hb_pending)
214 s->tlsext_hb_pending = 0;
225 case SSL_ST_RENEGOTIATE:
227 s->state=SSL_ST_CONNECT;
228 s->ctx->stats.sess_connect_renegotiate++;
229 #ifndef OPENSSL_NO_TLSEXT
231 * If renegotiating, the server may choose to not issue
232 * a new ticket, so reset the flag. It will be set to
233 * the right value when parsing ServerHello extensions.
235 s->tlsext_ticket_expected = 0;
240 case SSL_ST_BEFORE|SSL_ST_CONNECT:
241 case SSL_ST_OK|SSL_ST_CONNECT:
244 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
246 if ((s->version & 0xff00 ) != 0x0300)
248 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
253 if (!ssl_security(s, SSL_SECOP_VERSION, 0,
256 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW);
260 /* s->version=SSL3_VERSION; */
261 s->type=SSL_ST_CONNECT;
263 if (s->init_buf == NULL)
265 if ((buf=BUF_MEM_new()) == NULL)
270 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
279 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
281 /* setup buffing BIO */
282 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
284 /* don't push the buffering BIO quite yet */
286 ssl3_init_finished_mac(s);
288 s->state=SSL3_ST_CW_CLNT_HELLO_A;
289 s->ctx->stats.sess_connect++;
293 case SSL3_ST_CW_CLNT_HELLO_A:
294 case SSL3_ST_CW_CLNT_HELLO_B:
297 ret=ssl3_client_hello(s);
298 if (ret <= 0) goto end;
299 s->state=SSL3_ST_CR_SRVR_HELLO_A;
302 /* turn on buffering for the next lot of output */
303 if (s->bbio != s->wbio)
304 s->wbio=BIO_push(s->bbio,s->wbio);
308 case SSL3_ST_CR_SRVR_HELLO_A:
309 case SSL3_ST_CR_SRVR_HELLO_B:
310 ret=ssl3_get_server_hello(s);
311 if (ret <= 0) goto end;
315 s->state=SSL3_ST_CR_FINISHED_A;
316 #ifndef OPENSSL_NO_TLSEXT
317 if (s->tlsext_ticket_expected)
319 /* receive renewed session ticket */
320 s->state=SSL3_ST_CR_SESSION_TICKET_A;
326 s->state=SSL3_ST_CR_CERT_A;
330 case SSL3_ST_CR_CERT_A:
331 case SSL3_ST_CR_CERT_B:
332 #ifndef OPENSSL_NO_TLSEXT
333 ret=ssl3_check_finished(s);
334 if (ret <= 0) goto end;
338 if (s->tlsext_ticket_expected)
339 s->state=SSL3_ST_CR_SESSION_TICKET_A;
341 s->state=SSL3_ST_CR_FINISHED_A;
346 /* Check if it is anon DH/ECDH, SRP auth */
348 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) &&
349 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
351 ret=ssl3_get_server_certificate(s);
352 if (ret <= 0) goto end;
353 #ifndef OPENSSL_NO_TLSEXT
354 if (s->tlsext_status_expected)
355 s->state=SSL3_ST_CR_CERT_STATUS_A;
357 s->state=SSL3_ST_CR_KEY_EXCH_A;
362 s->state=SSL3_ST_CR_KEY_EXCH_A;
369 s->state=SSL3_ST_CR_KEY_EXCH_A;
374 case SSL3_ST_CR_KEY_EXCH_A:
375 case SSL3_ST_CR_KEY_EXCH_B:
376 ret=ssl3_get_key_exchange(s);
377 if (ret <= 0) goto end;
378 s->state=SSL3_ST_CR_CERT_REQ_A;
381 /* at this point we check that we have the
382 * required stuff from the server */
383 if (!ssl3_check_cert_and_algorithm(s))
390 case SSL3_ST_CR_CERT_REQ_A:
391 case SSL3_ST_CR_CERT_REQ_B:
392 ret=ssl3_get_certificate_request(s);
393 if (ret <= 0) goto end;
394 s->state=SSL3_ST_CR_SRVR_DONE_A;
398 case SSL3_ST_CR_SRVR_DONE_A:
399 case SSL3_ST_CR_SRVR_DONE_B:
400 ret=ssl3_get_server_done(s);
401 if (ret <= 0) goto end;
402 #ifndef OPENSSL_NO_SRP
403 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
405 if ((ret = SRP_Calc_A_param(s))<=0)
407 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
408 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
413 if (s->s3->tmp.cert_req)
414 s->state=SSL3_ST_CW_CERT_A;
416 s->state=SSL3_ST_CW_KEY_EXCH_A;
421 case SSL3_ST_CW_CERT_A:
422 case SSL3_ST_CW_CERT_B:
423 case SSL3_ST_CW_CERT_C:
424 case SSL3_ST_CW_CERT_D:
425 ret=ssl3_send_client_certificate(s);
426 if (ret <= 0) goto end;
427 s->state=SSL3_ST_CW_KEY_EXCH_A;
431 case SSL3_ST_CW_KEY_EXCH_A:
432 case SSL3_ST_CW_KEY_EXCH_B:
433 ret=ssl3_send_client_key_exchange(s);
434 if (ret <= 0) goto end;
435 /* EAY EAY EAY need to check for DH fix cert
437 /* For TLS, cert_req is set to 2, so a cert chain
438 * of nothing is sent, but no verify packet is sent */
439 /* XXX: For now, we do not support client
440 * authentication in ECDH cipher suites with
441 * ECDH (rather than ECDSA) certificates.
442 * We need to skip the certificate verify
443 * message when client's ECDH public key is sent
444 * inside the client certificate.
446 if (s->s3->tmp.cert_req == 1)
448 s->state=SSL3_ST_CW_CERT_VRFY_A;
452 s->state=SSL3_ST_CW_CHANGE_A;
453 s->s3->change_cipher_spec=0;
455 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
457 s->state=SSL3_ST_CW_CHANGE_A;
458 s->s3->change_cipher_spec=0;
464 case SSL3_ST_CW_CERT_VRFY_A:
465 case SSL3_ST_CW_CERT_VRFY_B:
466 ret=ssl3_send_client_verify(s);
467 if (ret <= 0) goto end;
468 s->state=SSL3_ST_CW_CHANGE_A;
470 s->s3->change_cipher_spec=0;
473 case SSL3_ST_CW_CHANGE_A:
474 case SSL3_ST_CW_CHANGE_B:
475 ret=ssl3_send_change_cipher_spec(s,
476 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
477 if (ret <= 0) goto end;
479 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
480 s->state=SSL3_ST_CW_FINISHED_A;
482 if (s->s3->next_proto_neg_seen)
483 s->state=SSL3_ST_CW_NEXT_PROTO_A;
485 s->state=SSL3_ST_CW_FINISHED_A;
489 s->session->cipher=s->s3->tmp.new_cipher;
490 #ifdef OPENSSL_NO_COMP
491 s->session->compress_meth=0;
493 if (s->s3->tmp.new_compression == NULL)
494 s->session->compress_meth=0;
496 s->session->compress_meth=
497 s->s3->tmp.new_compression->id;
499 if (!s->method->ssl3_enc->setup_key_block(s))
505 if (!s->method->ssl3_enc->change_cipher_state(s,
506 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
514 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
515 case SSL3_ST_CW_NEXT_PROTO_A:
516 case SSL3_ST_CW_NEXT_PROTO_B:
517 ret=ssl3_send_next_proto(s);
518 if (ret <= 0) goto end;
519 s->state=SSL3_ST_CW_FINISHED_A;
523 case SSL3_ST_CW_FINISHED_A:
524 case SSL3_ST_CW_FINISHED_B:
525 ret=ssl3_send_finished(s,
526 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
527 s->method->ssl3_enc->client_finished_label,
528 s->method->ssl3_enc->client_finished_label_len);
529 if (ret <= 0) goto end;
530 s->s3->flags |= SSL3_FLAGS_CCS_OK;
531 s->state=SSL3_ST_CW_FLUSH;
534 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
537 s->s3->tmp.next_state=SSL_ST_OK;
538 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
541 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
542 s->s3->delay_buf_pop_ret=0;
547 #ifndef OPENSSL_NO_TLSEXT
548 /* Allow NewSessionTicket if ticket expected */
549 if (s->tlsext_ticket_expected)
550 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
554 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
559 #ifndef OPENSSL_NO_TLSEXT
560 case SSL3_ST_CR_SESSION_TICKET_A:
561 case SSL3_ST_CR_SESSION_TICKET_B:
562 ret=ssl3_get_new_session_ticket(s);
563 if (ret <= 0) goto end;
564 s->state=SSL3_ST_CR_FINISHED_A;
568 case SSL3_ST_CR_CERT_STATUS_A:
569 case SSL3_ST_CR_CERT_STATUS_B:
570 ret=ssl3_get_cert_status(s);
571 if (ret <= 0) goto end;
572 s->state=SSL3_ST_CR_KEY_EXCH_A;
577 case SSL3_ST_CR_FINISHED_A:
578 case SSL3_ST_CR_FINISHED_B:
580 s->s3->flags |= SSL3_FLAGS_CCS_OK;
581 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
582 SSL3_ST_CR_FINISHED_B);
583 if (ret <= 0) goto end;
586 s->state=SSL3_ST_CW_CHANGE_A;
592 case SSL3_ST_CW_FLUSH:
593 s->rwstate=SSL_WRITING;
594 if (BIO_flush(s->wbio) <= 0)
599 s->rwstate=SSL_NOTHING;
600 s->state=s->s3->tmp.next_state;
604 /* clean a few things up */
605 ssl3_cleanup_key_block(s);
607 if (s->init_buf != NULL)
609 BUF_MEM_free(s->init_buf);
613 /* If we are not 'joining' the last two packets,
614 * remove the buffering now */
615 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
616 ssl_free_wbio_buffer(s);
617 /* else do it later in ssl3_write */
623 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
624 if (s->hit) s->ctx->stats.sess_hit++;
628 s->handshake_func=ssl3_connect;
629 s->ctx->stats.sess_connect_good++;
631 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
637 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
643 /* did we do anything */
644 if (!s->s3->tmp.reuse_message && !skip)
648 if ((ret=BIO_flush(s->wbio)) <= 0)
652 if ((cb != NULL) && (s->state != state))
656 cb(s,SSL_CB_CONNECT_LOOP,1);
667 cb(s,SSL_CB_CONNECT_EXIT,ret);
672 int ssl3_client_hello(SSL *s)
679 #ifndef OPENSSL_NO_COMP
684 buf=(unsigned char *)s->init_buf->data;
685 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
687 SSL_SESSION *sess = s->session;
688 if ((sess == NULL) ||
689 (sess->ssl_version != s->version) ||
690 #ifdef OPENSSL_NO_TLSEXT
691 !sess->session_id_length ||
693 (!sess->session_id_length && !sess->tlsext_tick) ||
695 (sess->not_resumable))
697 if (!ssl_get_new_session(s,0))
700 if (s->method->version == DTLS_ANY_VERSION)
702 /* Determine which DTLS version to use */
703 int options = s->options;
704 /* If DTLS 1.2 disabled correct the version number */
705 if (options & SSL_OP_NO_DTLSv1_2)
709 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
712 /* Disabling all versions is silly: return an
715 if (options & SSL_OP_NO_DTLSv1)
717 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
720 /* Update method so we don't use any DTLS 1.2
723 s->method = DTLSv1_client_method();
724 s->version = DTLS1_VERSION;
728 /* We only support one version: update method */
729 if (options & SSL_OP_NO_DTLSv1)
730 s->method = DTLSv1_2_client_method();
731 s->version = DTLS1_2_VERSION;
733 s->client_version = s->version;
735 /* else use the pre-loaded session */
737 p=s->s3->client_random;
739 /* for DTLS if client_random is initialized, reuse it, we are
740 * required to use same upon reply to HelloVerify */
745 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
758 ssl_fill_hello_random(s, 0, p,
759 sizeof(s->s3->client_random));
761 /* Do the message type and length last */
762 d=p= ssl_handshake_start(s);
764 /* version indicates the negotiated version: for example from
765 * an SSLv2/v3 compatible client hello). The client_version
766 * field is the maximum version we permit and it is also
767 * used in RSA encrypted premaster secrets. Some servers can
768 * choke if we initially report a higher version then
769 * renegotiate to a lower one in the premaster secret. This
770 * didn't happen with TLS 1.0 as most servers supported it
771 * but it can with TLS 1.1 or later if the server only supports
774 * Possible scenario with previous logic:
775 * 1. Client hello indicates TLS 1.2
776 * 2. Server hello says TLS 1.0
777 * 3. RSA encrypted premaster secret uses 1.2.
778 * 4. Handhaked proceeds using TLS 1.0.
779 * 5. Server sends hello request to renegotiate.
780 * 6. Client hello indicates TLS v1.0 as we now
781 * know that is maximum server supports.
782 * 7. Server chokes on RSA encrypted premaster secret
783 * containing version 1.0.
785 * For interoperability it should be OK to always use the
786 * maximum version we support in client hello and then rely
787 * on the checking of version to ensure the servers isn't
788 * being inconsistent: for example initially negotiating with
789 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
790 * client_version in client hello and not resetting it to
791 * the negotiated version.
794 *(p++)=s->version>>8;
795 *(p++)=s->version&0xff;
796 s->client_version=s->version;
798 *(p++)=s->client_version>>8;
799 *(p++)=s->client_version&0xff;
803 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
810 i=s->session->session_id_length;
814 if (i > (int)sizeof(s->session->session_id))
816 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
819 memcpy(p,s->session->session_id,i);
823 /* cookie stuff for DTLS */
826 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
828 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
831 *(p++) = s->d1->cookie_len;
832 memcpy(p, s->d1->cookie, s->d1->cookie_len);
833 p += s->d1->cookie_len;
836 /* Ciphers supported */
837 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
840 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
843 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
844 /* Some servers hang if client hello > 256 bytes
845 * as hack workaround chop number of supported ciphers
846 * to keep it well below this if we use TLS v1.2
848 if (TLS1_get_version(s) >= TLS1_2_VERSION
849 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
850 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
856 #ifdef OPENSSL_NO_COMP
860 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
863 j=sk_SSL_COMP_num(s->ctx->comp_methods);
867 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
871 *(p++)=0; /* Add the NULL method */
873 #ifndef OPENSSL_NO_TLSEXT
875 if (ssl_prepare_clienthello_tlsext(s) <= 0)
877 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
880 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
882 ssl3_send_alert(s,SSL3_AL_FATAL,al);
883 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
889 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
890 s->state=SSL3_ST_CW_CLNT_HELLO_B;
893 /* SSL3_ST_CW_CLNT_HELLO_B */
894 return ssl_do_write(s);
899 int ssl3_get_server_hello(SSL *s)
901 STACK_OF(SSL_CIPHER) *sk;
905 int i,al=SSL_AD_INTERNAL_ERROR,ok;
908 #ifndef OPENSSL_NO_COMP
911 /* Hello verify request and/or server hello version may not
912 * match so set first packet if we're negotiating version.
917 n=s->method->ssl_get_message(s,
918 SSL3_ST_CR_SRVR_HELLO_A,
919 SSL3_ST_CR_SRVR_HELLO_B,
924 if (!ok) return((int)n);
929 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
931 if ( s->d1->send_cookie == 0)
933 s->s3->tmp.reuse_message = 1;
936 else /* already sent a cookie */
938 al=SSL_AD_UNEXPECTED_MESSAGE;
939 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
945 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
947 al=SSL_AD_UNEXPECTED_MESSAGE;
948 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
952 d=p=(unsigned char *)s->init_msg;
953 if (s->method->version == DTLS_ANY_VERSION)
955 /* Work out correct protocol version to use */
956 int hversion = (p[0] << 8)|p[1];
957 int options = s->options;
958 if (hversion == DTLS1_2_VERSION
959 && !(options & SSL_OP_NO_DTLSv1_2))
960 s->method = DTLSv1_2_client_method();
961 else if (tls1_suiteb(s))
963 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
964 s->version = hversion;
965 al = SSL_AD_PROTOCOL_VERSION;
968 else if (hversion == DTLS1_VERSION
969 && !(options & SSL_OP_NO_DTLSv1))
970 s->method = DTLSv1_client_method();
973 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
974 s->version = hversion;
975 al = SSL_AD_PROTOCOL_VERSION;
978 s->version = s->client_version = s->method->version;
981 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
983 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
984 s->version=(s->version&0xff00)|p[1];
985 al=SSL_AD_PROTOCOL_VERSION;
990 /* load the server hello data */
991 /* load the server random */
992 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
995 /* get the session-id */
998 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
1000 al=SSL_AD_ILLEGAL_PARAMETER;
1001 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
1005 #ifndef OPENSSL_NO_TLSEXT
1006 /* check if we want to resume the session based on external pre-shared secret */
1007 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1009 SSL_CIPHER *pref_cipher=NULL;
1010 s->session->master_key_length=sizeof(s->session->master_key);
1011 if (s->tls_session_secret_cb(s, s->session->master_key,
1012 &s->session->master_key_length,
1014 s->tls_session_secret_cb_arg))
1016 s->session->cipher = pref_cipher ?
1017 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1018 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1021 #endif /* OPENSSL_NO_TLSEXT */
1023 if (j != 0 && j == s->session->session_id_length
1024 && memcmp(p,s->session->session_id,j) == 0)
1026 if(s->sid_ctx_length != s->session->sid_ctx_length
1027 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1029 /* actually a client application bug */
1030 al=SSL_AD_ILLEGAL_PARAMETER;
1031 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1034 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1037 else /* a miss or crap from the other end */
1039 /* If we were trying for session-id reuse, make a new
1040 * SSL_SESSION so we don't stuff up other people */
1042 if (s->session->session_id_length > 0)
1044 if (!ssl_get_new_session(s,0))
1049 s->session->session_id_length=j;
1050 memcpy(s->session->session_id,p,j); /* j could be 0 */
1053 c=ssl_get_cipher_by_char(s,p);
1056 /* unknown cipher */
1057 al=SSL_AD_ILLEGAL_PARAMETER;
1058 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1061 /* Set version disabled mask now we know version */
1062 if (!SSL_USE_TLS1_2_CIPHERS(s))
1063 ct->mask_ssl = SSL_TLSV1_2;
1066 /* If it is a disabled cipher we didn't send it in client hello,
1067 * so return an error.
1069 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK))
1071 al=SSL_AD_ILLEGAL_PARAMETER;
1072 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1075 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1077 sk=ssl_get_ciphers_by_id(s);
1078 i=sk_SSL_CIPHER_find(sk,c);
1081 /* we did not say we would use this cipher */
1082 al=SSL_AD_ILLEGAL_PARAMETER;
1083 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1087 /* Depending on the session caching (internal/external), the cipher
1088 and/or cipher_id values may not be set. Make sure that
1089 cipher_id is set and use it for comparison. */
1090 if (s->session->cipher)
1091 s->session->cipher_id = s->session->cipher->id;
1092 if (s->hit && (s->session->cipher_id != c->id))
1094 /* Workaround is now obsolete */
1097 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1100 al=SSL_AD_ILLEGAL_PARAMETER;
1101 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1105 s->s3->tmp.new_cipher=c;
1106 /* Don't digest cached records if no sigalgs: we may need them for
1107 * client authentication.
1109 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1111 /* lets get the compression algorithm */
1113 #ifdef OPENSSL_NO_COMP
1116 al=SSL_AD_ILLEGAL_PARAMETER;
1117 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1120 /* If compression is disabled we'd better not try to resume a session
1121 * using compression.
1123 if (s->session->compress_meth != 0)
1125 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1130 if (s->hit && j != s->session->compress_meth)
1132 al=SSL_AD_ILLEGAL_PARAMETER;
1133 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1138 else if (!ssl_allow_compression(s))
1140 al=SSL_AD_ILLEGAL_PARAMETER;
1141 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1145 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1147 if ((j != 0) && (comp == NULL))
1149 al=SSL_AD_ILLEGAL_PARAMETER;
1150 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1155 s->s3->tmp.new_compression=comp;
1159 #ifndef OPENSSL_NO_TLSEXT
1161 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1163 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1170 /* wrong packet length */
1171 al=SSL_AD_DECODE_ERROR;
1172 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1178 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1183 int ssl3_get_server_certificate(SSL *s)
1185 int al,i,ok,ret= -1;
1186 unsigned long n,nc,llen,l;
1188 const unsigned char *q,*p;
1190 STACK_OF(X509) *sk=NULL;
1192 EVP_PKEY *pkey=NULL;
1193 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1195 n=s->method->ssl_get_message(s,
1202 if (!ok) return((int)n);
1204 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1205 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1206 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1208 s->s3->tmp.reuse_message=1;
1212 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1214 al=SSL_AD_UNEXPECTED_MESSAGE;
1215 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1218 p=d=(unsigned char *)s->init_msg;
1220 if ((sk=sk_X509_new_null()) == NULL)
1222 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1229 al=SSL_AD_DECODE_ERROR;
1230 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1233 for (nc=0; nc<llen; )
1236 if ((l+nc+3) > llen)
1238 al=SSL_AD_DECODE_ERROR;
1239 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1244 x=d2i_X509(NULL,&q,l);
1247 al=SSL_AD_BAD_CERTIFICATE;
1248 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1253 al=SSL_AD_DECODE_ERROR;
1254 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1257 if (!sk_X509_push(sk,x))
1259 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1267 i=ssl_verify_cert_chain(s,sk);
1268 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1269 #ifndef OPENSSL_NO_KRB5
1270 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1271 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1272 #endif /* OPENSSL_NO_KRB5 */
1275 al=ssl_verify_alarm_type(s->verify_result);
1276 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1279 ERR_clear_error(); /* but we keep s->verify_result */
1282 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1283 al = SSL_AD_HANDSHAKE_FAILURE;
1287 sc=ssl_sess_cert_new();
1288 if (sc == NULL) goto err;
1290 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1291 s->session->sess_cert=sc;
1294 /* Inconsistency alert: cert_chain does include the peer's
1295 * certificate, which we don't include in s3_srvr.c */
1296 x=sk_X509_value(sk,0);
1298 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1300 pkey=X509_get_pubkey(x);
1302 /* VRS: allow null cert if auth == KRB5 */
1303 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1304 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1308 printf("pkey,x = %p, %p\n", pkey,x);
1309 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1310 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1311 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1312 #endif /* KSSL_DEBUG */
1314 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1318 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1319 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1323 i=ssl_cert_type(x,pkey);
1324 if (need_cert && i < 0)
1328 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1329 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1335 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1336 if (exp_idx >= 0 && i != exp_idx)
1339 al=SSL_AD_ILLEGAL_PARAMETER;
1340 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1341 SSL_R_WRONG_CERTIFICATE_TYPE);
1344 sc->peer_cert_type=i;
1345 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1346 /* Why would the following ever happen?
1347 * We just created sc a couple of lines ago. */
1348 if (sc->peer_pkeys[i].x509 != NULL)
1349 X509_free(sc->peer_pkeys[i].x509);
1350 sc->peer_pkeys[i].x509=x;
1351 sc->peer_key= &(sc->peer_pkeys[i]);
1353 if (s->session->peer != NULL)
1354 X509_free(s->session->peer);
1355 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1360 sc->peer_cert_type=i;
1363 if (s->session->peer != NULL)
1364 X509_free(s->session->peer);
1365 s->session->peer=NULL;
1367 s->session->verify_result = s->verify_result;
1374 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1377 EVP_PKEY_free(pkey);
1379 sk_X509_pop_free(sk,X509_free);
1383 int ssl3_get_key_exchange(SSL *s)
1385 #ifndef OPENSSL_NO_RSA
1386 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1389 unsigned char *param,*p;
1391 long i,param_len,n,alg_k,alg_a;
1392 EVP_PKEY *pkey=NULL;
1393 const EVP_MD *md = NULL;
1394 #ifndef OPENSSL_NO_RSA
1397 #ifndef OPENSSL_NO_DH
1400 #ifndef OPENSSL_NO_ECDH
1401 EC_KEY *ecdh = NULL;
1402 BN_CTX *bn_ctx = NULL;
1403 EC_POINT *srvr_ecpoint = NULL;
1405 int encoded_pt_len = 0;
1408 /* use same message size as in ssl3_get_certificate_request()
1409 * as ServerKeyExchange message may be skipped */
1410 n=s->method->ssl_get_message(s,
1411 SSL3_ST_CR_KEY_EXCH_A,
1412 SSL3_ST_CR_KEY_EXCH_B,
1416 if (!ok) return((int)n);
1418 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1420 #ifndef OPENSSL_NO_PSK
1421 /* In plain PSK ciphersuite, ServerKeyExchange can be
1422 omitted if no identity hint is sent. Set
1423 session->sess_cert anyway to avoid problems
1425 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1427 s->session->sess_cert=ssl_sess_cert_new();
1428 if (s->ctx->psk_identity_hint)
1429 OPENSSL_free(s->ctx->psk_identity_hint);
1430 s->ctx->psk_identity_hint = NULL;
1433 s->s3->tmp.reuse_message=1;
1437 param=p=(unsigned char *)s->init_msg;
1438 if (s->session->sess_cert != NULL)
1440 #ifndef OPENSSL_NO_RSA
1441 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1443 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1444 s->session->sess_cert->peer_rsa_tmp=NULL;
1447 #ifndef OPENSSL_NO_DH
1448 if (s->session->sess_cert->peer_dh_tmp)
1450 DH_free(s->session->sess_cert->peer_dh_tmp);
1451 s->session->sess_cert->peer_dh_tmp=NULL;
1454 #ifndef OPENSSL_NO_ECDH
1455 if (s->session->sess_cert->peer_ecdh_tmp)
1457 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1458 s->session->sess_cert->peer_ecdh_tmp=NULL;
1464 s->session->sess_cert=ssl_sess_cert_new();
1467 /* Total length of the parameters including the length prefix */
1470 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1471 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1472 EVP_MD_CTX_init(&md_ctx);
1474 al=SSL_AD_DECODE_ERROR;
1476 #ifndef OPENSSL_NO_PSK
1477 if (alg_k & SSL_kPSK)
1479 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1484 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1485 SSL_R_LENGTH_TOO_SHORT);
1490 /* Store PSK identity hint for later use, hint is used
1491 * in ssl3_send_client_key_exchange. Assume that the
1492 * maximum length of a PSK identity hint can be as
1493 * long as the maximum length of a PSK identity. */
1494 if (i > PSK_MAX_IDENTITY_LEN)
1496 al=SSL_AD_HANDSHAKE_FAILURE;
1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1498 SSL_R_DATA_LENGTH_TOO_LONG);
1501 if (i > n - param_len)
1503 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1504 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1509 /* If received PSK identity hint contains NULL
1510 * characters, the hint is truncated from the first
1511 * NULL. p may not be ending with NULL, so create a
1512 * NULL-terminated string. */
1513 memcpy(tmp_id_hint, p, i);
1514 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1515 if (s->ctx->psk_identity_hint != NULL)
1516 OPENSSL_free(s->ctx->psk_identity_hint);
1517 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1518 if (s->ctx->psk_identity_hint == NULL)
1520 al=SSL_AD_HANDSHAKE_FAILURE;
1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1529 #endif /* !OPENSSL_NO_PSK */
1530 #ifndef OPENSSL_NO_SRP
1531 if (alg_k & SSL_kSRP)
1536 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1537 SSL_R_LENGTH_TOO_SHORT);
1542 if (i > n - param_len)
1544 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1549 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1551 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1557 if (2 > n - param_len)
1559 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1560 SSL_R_LENGTH_TOO_SHORT);
1567 if (i > n - param_len)
1569 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1574 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1576 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1582 if (1 > n - param_len)
1584 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1585 SSL_R_LENGTH_TOO_SHORT);
1590 i = (unsigned int)(p[0]);
1593 if (i > n - param_len)
1595 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1600 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1602 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1607 if (2 > n - param_len)
1609 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1610 SSL_R_LENGTH_TOO_SHORT);
1617 if (i > n - param_len)
1619 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1624 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1626 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1632 if (!srp_verify_server_param(s, &al))
1634 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1638 /* We must check if there is a certificate */
1639 #ifndef OPENSSL_NO_RSA
1640 if (alg_a & SSL_aRSA)
1641 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1646 #ifndef OPENSSL_NO_DSA
1647 else if (alg_a & SSL_aDSS)
1648 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1652 #endif /* !OPENSSL_NO_SRP */
1653 #ifndef OPENSSL_NO_RSA
1654 if (alg_k & SSL_kRSA)
1656 if ((rsa=RSA_new()) == NULL)
1658 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1665 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1666 SSL_R_LENGTH_TOO_SHORT);
1671 if (i > n - param_len)
1673 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1678 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1680 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1685 if (2 > n - param_len)
1687 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1688 SSL_R_LENGTH_TOO_SHORT);
1695 if (i > n - param_len)
1697 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1702 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1704 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1710 /* this should be because we are using an export cipher */
1711 if (alg_a & SSL_aRSA)
1712 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1715 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1718 s->session->sess_cert->peer_rsa_tmp=rsa;
1721 #else /* OPENSSL_NO_RSA */
1725 #ifndef OPENSSL_NO_DH
1726 else if (alg_k & SSL_kDHE)
1728 if ((dh=DH_new()) == NULL)
1730 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1737 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1738 SSL_R_LENGTH_TOO_SHORT);
1743 if (i > n - param_len)
1745 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1750 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1752 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1757 if (2 > n - param_len)
1759 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1760 SSL_R_LENGTH_TOO_SHORT);
1767 if (i > n - param_len)
1769 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1774 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1776 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1781 if (2 > n - param_len)
1783 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1784 SSL_R_LENGTH_TOO_SHORT);
1791 if (i > n - param_len)
1793 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1798 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1800 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1806 if (!ssl_security(s, SSL_SECOP_TMP_DH,
1807 DH_security_bits(dh), 0, dh))
1809 al=SSL_AD_HANDSHAKE_FAILURE;
1810 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL);
1814 #ifndef OPENSSL_NO_RSA
1815 if (alg_a & SSL_aRSA)
1816 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1821 #ifndef OPENSSL_NO_DSA
1822 else if (alg_a & SSL_aDSS)
1823 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1825 /* else anonymous DH, so no certificate or pkey. */
1827 s->session->sess_cert->peer_dh_tmp=dh;
1830 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1832 al=SSL_AD_ILLEGAL_PARAMETER;
1833 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1836 #endif /* !OPENSSL_NO_DH */
1838 #ifndef OPENSSL_NO_ECDH
1839 else if (alg_k & SSL_kECDHE)
1842 const EC_GROUP *group;
1844 if ((ecdh=EC_KEY_new()) == NULL)
1846 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1850 /* Extract elliptic curve parameters and the
1851 * server's ephemeral ECDH public key.
1852 * Keep accumulating lengths of various components in
1853 * param_len and make sure it never exceeds n.
1856 /* XXX: For now we only support named (not generic) curves
1857 * and the ECParameters in this case is just three bytes. We
1858 * also need one byte for the length of the encoded point
1863 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1864 SSL_R_LENGTH_TOO_SHORT);
1867 /* Check curve is one of our preferences, if not server has
1868 * sent an invalid curve. ECParameters is 3 bytes.
1870 if (!tls1_check_curve(s, p, 3))
1872 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1876 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1878 al=SSL_AD_INTERNAL_ERROR;
1879 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1883 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1886 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1889 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1891 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1894 EC_GROUP_free(ngroup);
1896 group = EC_KEY_get0_group(ecdh);
1898 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1899 (EC_GROUP_get_degree(group) > 163))
1901 al=SSL_AD_EXPORT_RESTRICTION;
1902 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1908 /* Next, get the encoded ECPoint */
1909 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1910 ((bn_ctx = BN_CTX_new()) == NULL))
1912 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1916 encoded_pt_len = *p; /* length of encoded point */
1919 if ((encoded_pt_len > n - param_len) ||
1920 (EC_POINT_oct2point(group, srvr_ecpoint,
1921 p, encoded_pt_len, bn_ctx) == 0))
1923 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1926 param_len += encoded_pt_len;
1931 /* The ECC/TLS specification does not mention
1932 * the use of DSA to sign ECParameters in the server
1933 * key exchange message. We do support RSA and ECDSA.
1936 #ifndef OPENSSL_NO_RSA
1937 else if (alg_a & SSL_aRSA)
1938 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1940 #ifndef OPENSSL_NO_ECDSA
1941 else if (alg_a & SSL_aECDSA)
1942 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1944 /* else anonymous ECDH, so no certificate or pkey. */
1945 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1946 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1948 BN_CTX_free(bn_ctx);
1950 EC_POINT_free(srvr_ecpoint);
1951 srvr_ecpoint = NULL;
1955 al=SSL_AD_UNEXPECTED_MESSAGE;
1956 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1959 #endif /* !OPENSSL_NO_ECDH */
1962 /* p points to the next byte, there are 'n' bytes left */
1964 /* if it was signed, check the signature */
1967 if (SSL_USE_SIGALGS(s))
1972 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1973 SSL_R_LENGTH_TOO_SHORT);
1976 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1984 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1994 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1995 SSL_R_LENGTH_TOO_SHORT);
2000 j=EVP_PKEY_size(pkey);
2002 /* Check signature length. If n is 0 then signature is empty */
2003 if ((i != n) || (n > j) || (n <= 0))
2005 /* wrong packet length */
2006 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
2010 #ifndef OPENSSL_NO_RSA
2011 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
2018 for (num=2; num > 0; num--)
2020 EVP_MD_CTX_set_flags(&md_ctx,
2021 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
2022 EVP_DigestInit_ex(&md_ctx,(num == 2)
2023 ?s->ctx->md5:s->ctx->sha1, NULL);
2024 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2025 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2026 EVP_DigestUpdate(&md_ctx,param,param_len);
2027 EVP_DigestFinal_ex(&md_ctx,q,&size);
2031 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
2035 al=SSL_AD_DECRYPT_ERROR;
2036 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
2042 al=SSL_AD_DECRYPT_ERROR;
2043 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2050 EVP_VerifyInit_ex(&md_ctx, md, NULL);
2051 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2052 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2053 EVP_VerifyUpdate(&md_ctx,param,param_len);
2054 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
2057 al=SSL_AD_DECRYPT_ERROR;
2058 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2065 /* aNULL, aSRP or kPSK do not need public keys */
2066 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
2068 /* Might be wrong key type, check it */
2069 if (ssl3_check_cert_and_algorithm(s))
2070 /* Otherwise this shouldn't happen */
2071 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2074 /* still data left over */
2077 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
2081 EVP_PKEY_free(pkey);
2082 EVP_MD_CTX_cleanup(&md_ctx);
2085 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2087 EVP_PKEY_free(pkey);
2088 #ifndef OPENSSL_NO_RSA
2092 #ifndef OPENSSL_NO_DH
2096 #ifndef OPENSSL_NO_ECDH
2097 BN_CTX_free(bn_ctx);
2098 EC_POINT_free(srvr_ecpoint);
2102 EVP_MD_CTX_cleanup(&md_ctx);
2106 int ssl3_get_certificate_request(SSL *s)
2109 unsigned long n,nc,l;
2110 unsigned int llen, ctype_num,i;
2112 const unsigned char *p,*q;
2114 STACK_OF(X509_NAME) *ca_sk=NULL;
2116 n=s->method->ssl_get_message(s,
2117 SSL3_ST_CR_CERT_REQ_A,
2118 SSL3_ST_CR_CERT_REQ_B,
2123 if (!ok) return((int)n);
2125 s->s3->tmp.cert_req=0;
2127 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2129 s->s3->tmp.reuse_message=1;
2130 /* If we get here we don't need any cached handshake records
2131 * as we wont be doing client auth.
2133 if (s->s3->handshake_buffer)
2135 if (!ssl3_digest_cached_records(s))
2141 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2143 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2144 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2148 /* TLS does not like anon-DH with client cert */
2149 if (s->version > SSL3_VERSION)
2151 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2153 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2154 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2159 p=d=(unsigned char *)s->init_msg;
2161 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2163 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2167 /* get the certificate types */
2169 if (s->cert->ctypes)
2171 OPENSSL_free(s->cert->ctypes);
2172 s->cert->ctypes = NULL;
2174 if (ctype_num > SSL3_CT_NUMBER)
2176 /* If we exceed static buffer copy all to cert structure */
2177 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2178 memcpy(s->cert->ctypes, p, ctype_num);
2179 s->cert->ctype_num = (size_t)ctype_num;
2180 ctype_num=SSL3_CT_NUMBER;
2182 for (i=0; i<ctype_num; i++)
2183 s->s3->tmp.ctype[i]= p[i];
2185 if (SSL_USE_SIGALGS(s))
2188 /* Check we have enough room for signature algorithms and
2189 * following length value.
2191 if ((unsigned long)(p - d + llen + 2) > n)
2193 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2194 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2197 /* Clear certificate digests and validity flags */
2198 for (i = 0; i < SSL_PKEY_NUM; i++)
2200 s->cert->pkeys[i].digest = NULL;
2201 s->cert->pkeys[i].valid_flags = 0;
2203 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen))
2205 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2206 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2209 if (!tls1_process_sigalgs(s))
2211 ssl3_send_alert(s,SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2212 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2218 /* get the CA RDNs */
2223 out=fopen("/tmp/vsign.der","w");
2224 fwrite(p,1,llen,out);
2229 if ((unsigned long)(p - d + llen) != n)
2231 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2232 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2236 for (nc=0; nc<llen; )
2239 if ((l+nc+2) > llen)
2241 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2242 goto cont; /* netscape bugs */
2243 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2244 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2250 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2252 /* If netscape tolerance is on, ignore errors */
2253 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2257 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2258 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2265 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2266 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2269 if (!sk_X509_NAME_push(ca_sk,xn))
2271 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2285 /* we should setup a certificate to return.... */
2286 s->s3->tmp.cert_req=1;
2287 s->s3->tmp.ctype_num=ctype_num;
2288 if (s->s3->tmp.ca_names != NULL)
2289 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2290 s->s3->tmp.ca_names=ca_sk;
2295 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2299 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2301 return(X509_NAME_cmp(*a,*b));
2303 #ifndef OPENSSL_NO_TLSEXT
2304 int ssl3_get_new_session_ticket(SSL *s)
2306 int ok,al,ret=0, ticklen;
2308 const unsigned char *p;
2311 n=s->method->ssl_get_message(s,
2312 SSL3_ST_CR_SESSION_TICKET_A,
2313 SSL3_ST_CR_SESSION_TICKET_B,
2321 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2323 s->s3->tmp.reuse_message=1;
2326 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2328 al=SSL_AD_UNEXPECTED_MESSAGE;
2329 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2334 /* need at least ticket_lifetime_hint + ticket length */
2335 al = SSL_AD_DECODE_ERROR;
2336 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2340 p=d=(unsigned char *)s->init_msg;
2341 n2l(p, s->session->tlsext_tick_lifetime_hint);
2343 /* ticket_lifetime_hint + ticket_length + ticket */
2344 if (ticklen + 6 != n)
2346 al = SSL_AD_DECODE_ERROR;
2347 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2350 if (s->session->tlsext_tick)
2352 OPENSSL_free(s->session->tlsext_tick);
2353 s->session->tlsext_ticklen = 0;
2355 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2356 if (!s->session->tlsext_tick)
2358 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2361 memcpy(s->session->tlsext_tick, p, ticklen);
2362 s->session->tlsext_ticklen = ticklen;
2363 /* There are two ways to detect a resumed ticket session.
2364 * One is to set an appropriate session ID and then the server
2365 * must return a match in ServerHello. This allows the normal
2366 * client session ID matching to work and we know much
2367 * earlier that the ticket has been accepted.
2369 * The other way is to set zero length session ID when the
2370 * ticket is presented and rely on the handshake to determine
2371 * session resumption.
2373 * We choose the former approach because this fits in with
2374 * assumptions elsewhere in OpenSSL. The session ID is set
2375 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2378 EVP_Digest(p, ticklen,
2379 s->session->session_id, &s->session->session_id_length,
2380 #ifndef OPENSSL_NO_SHA256
2381 EVP_sha256(), NULL);
2388 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2393 int ssl3_get_cert_status(SSL *s)
2396 unsigned long resplen,n;
2397 const unsigned char *p;
2399 n=s->method->ssl_get_message(s,
2400 SSL3_ST_CR_CERT_STATUS_A,
2401 SSL3_ST_CR_CERT_STATUS_B,
2402 SSL3_MT_CERTIFICATE_STATUS,
2406 if (!ok) return((int)n);
2409 /* need at least status type + length */
2410 al = SSL_AD_DECODE_ERROR;
2411 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2414 p = (unsigned char *)s->init_msg;
2415 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2417 al = SSL_AD_DECODE_ERROR;
2418 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2422 if (resplen + 4 != n)
2424 al = SSL_AD_DECODE_ERROR;
2425 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2428 if (s->tlsext_ocsp_resp)
2429 OPENSSL_free(s->tlsext_ocsp_resp);
2430 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2431 if (!s->tlsext_ocsp_resp)
2433 al = SSL_AD_INTERNAL_ERROR;
2434 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2437 s->tlsext_ocsp_resplen = resplen;
2438 if (s->ctx->tlsext_status_cb)
2441 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2444 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2445 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2450 al = SSL_AD_INTERNAL_ERROR;
2451 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2457 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2462 int ssl3_get_server_done(SSL *s)
2467 n=s->method->ssl_get_message(s,
2468 SSL3_ST_CR_SRVR_DONE_A,
2469 SSL3_ST_CR_SRVR_DONE_B,
2470 SSL3_MT_SERVER_DONE,
2471 30, /* should be very small, like 0 :-) */
2474 if (!ok) return((int)n);
2477 /* should contain no data */
2478 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2479 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2487 int ssl3_send_client_key_exchange(SSL *s)
2491 unsigned long alg_k;
2492 #ifndef OPENSSL_NO_RSA
2494 EVP_PKEY *pkey=NULL;
2496 #ifndef OPENSSL_NO_KRB5
2498 #endif /* OPENSSL_NO_KRB5 */
2499 #ifndef OPENSSL_NO_ECDH
2500 EC_KEY *clnt_ecdh = NULL;
2501 const EC_POINT *srvr_ecpoint = NULL;
2502 EVP_PKEY *srvr_pub_pkey = NULL;
2503 unsigned char *encodedPoint = NULL;
2504 int encoded_pt_len = 0;
2505 BN_CTX * bn_ctx = NULL;
2508 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2510 p = ssl_handshake_start(s);
2512 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2514 /* Fool emacs indentation */
2516 #ifndef OPENSSL_NO_RSA
2517 else if (alg_k & SSL_kRSA)
2520 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2522 if (s->session->sess_cert == NULL)
2524 /* We should always have a server certificate with SSL_kRSA. */
2525 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2529 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2530 rsa=s->session->sess_cert->peer_rsa_tmp;
2533 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2534 if ((pkey == NULL) ||
2535 (pkey->type != EVP_PKEY_RSA) ||
2536 (pkey->pkey.rsa == NULL))
2538 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2542 EVP_PKEY_free(pkey);
2545 tmp_buf[0]=s->client_version>>8;
2546 tmp_buf[1]=s->client_version&0xff;
2547 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2550 s->session->master_key_length=sizeof tmp_buf;
2553 /* Fix buf for TLS and beyond */
2554 if (s->version > SSL3_VERSION)
2556 n=RSA_public_encrypt(sizeof tmp_buf,
2557 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2559 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2560 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2564 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2568 /* Fix buf for TLS and beyond */
2569 if (s->version > SSL3_VERSION)
2575 s->session->master_key_length=
2576 s->method->ssl3_enc->generate_master_secret(s,
2577 s->session->master_key,
2578 tmp_buf,sizeof tmp_buf);
2579 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2582 #ifndef OPENSSL_NO_KRB5
2583 else if (alg_k & SSL_kKRB5)
2585 krb5_error_code krb5rc;
2586 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2587 /* krb5_data krb5_ap_req; */
2588 krb5_data *enc_ticket;
2589 krb5_data authenticator, *authp = NULL;
2590 EVP_CIPHER_CTX ciph_ctx;
2591 const EVP_CIPHER *enc = NULL;
2592 unsigned char iv[EVP_MAX_IV_LENGTH];
2593 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2594 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2595 + EVP_MAX_IV_LENGTH];
2596 int padl, outl = sizeof(epms);
2598 EVP_CIPHER_CTX_init(&ciph_ctx);
2601 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2603 #endif /* KSSL_DEBUG */
2607 if (KRB5SENDAUTH) authp = &authenticator;
2608 #endif /* KRB5SENDAUTH */
2610 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2612 enc = kssl_map_enc(kssl_ctx->enctype);
2617 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2618 if (krb5rc && kssl_err.text)
2619 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2621 #endif /* KSSL_DEBUG */
2625 ssl3_send_alert(s,SSL3_AL_FATAL,
2626 SSL_AD_HANDSHAKE_FAILURE);
2627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2632 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2633 ** in place of RFC 2712 KerberosWrapper, as in:
2635 ** Send ticket (copy to *p, set n = length)
2636 ** n = krb5_ap_req.length;
2637 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2638 ** if (krb5_ap_req.data)
2639 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2641 ** Now using real RFC 2712 KerberosWrapper
2642 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2643 ** Note: 2712 "opaque" types are here replaced
2644 ** with a 2-byte length followed by the value.
2646 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2647 ** Where "xx xx" = length bytes. Shown here with
2648 ** optional authenticator omitted.
2651 /* KerberosWrapper.Ticket */
2652 s2n(enc_ticket->length,p);
2653 memcpy(p, enc_ticket->data, enc_ticket->length);
2654 p+= enc_ticket->length;
2655 n = enc_ticket->length + 2;
2657 /* KerberosWrapper.Authenticator */
2658 if (authp && authp->length)
2660 s2n(authp->length,p);
2661 memcpy(p, authp->data, authp->length);
2663 n+= authp->length + 2;
2671 s2n(0,p);/* null authenticator length */
2675 tmp_buf[0]=s->client_version>>8;
2676 tmp_buf[1]=s->client_version&0xff;
2677 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2680 /* 20010420 VRS. Tried it this way; failed.
2681 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2682 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2683 ** kssl_ctx->length);
2684 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2687 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2688 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2690 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2692 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2694 if (outl > (int)sizeof epms)
2696 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2699 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2701 /* KerberosWrapper.EncryptedPreMasterSecret */
2703 memcpy(p, epms, outl);
2707 s->session->master_key_length=
2708 s->method->ssl3_enc->generate_master_secret(s,
2709 s->session->master_key,
2710 tmp_buf, sizeof tmp_buf);
2712 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2713 OPENSSL_cleanse(epms, outl);
2716 #ifndef OPENSSL_NO_DH
2717 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2719 DH *dh_srvr,*dh_clnt;
2720 SESS_CERT *scert = s->session->sess_cert;
2724 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2725 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2729 if (scert->peer_dh_tmp != NULL)
2730 dh_srvr=scert->peer_dh_tmp;
2733 /* we get them from the cert */
2734 int idx = scert->peer_cert_type;
2735 EVP_PKEY *spkey = NULL;
2738 spkey = X509_get_pubkey(
2739 scert->peer_pkeys[idx].x509);
2742 dh_srvr = EVP_PKEY_get1_DH(spkey);
2743 EVP_PKEY_free(spkey);
2745 if (dh_srvr == NULL)
2747 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2748 ERR_R_INTERNAL_ERROR);
2752 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2754 /* Use client certificate key */
2755 EVP_PKEY *clkey = s->cert->key->privatekey;
2758 dh_clnt = EVP_PKEY_get1_DH(clkey);
2759 if (dh_clnt == NULL)
2761 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2762 ERR_R_INTERNAL_ERROR);
2768 /* generate a new random key */
2769 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2771 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2774 if (!DH_generate_key(dh_clnt))
2776 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2782 /* use the 'p' output buffer for the DH key, but
2783 * make sure to clear it out afterwards */
2785 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2786 if (scert->peer_dh_tmp == NULL)
2791 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2796 /* generate master key from the result */
2797 s->session->master_key_length=
2798 s->method->ssl3_enc->generate_master_secret(s,
2799 s->session->master_key,p,n);
2803 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2807 /* send off the data */
2808 n=BN_num_bytes(dh_clnt->pub_key);
2810 BN_bn2bin(dh_clnt->pub_key,p);
2816 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2820 #ifndef OPENSSL_NO_ECDH
2821 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2823 const EC_GROUP *srvr_group = NULL;
2825 int ecdh_clnt_cert = 0;
2828 if (s->session->sess_cert == NULL)
2830 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2831 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2835 /* Did we send out the client's
2836 * ECDH share for use in premaster
2837 * computation as part of client certificate?
2838 * If so, set ecdh_clnt_cert to 1.
2840 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2842 /* XXX: For now, we do not support client
2843 * authentication using ECDH certificates.
2844 * To add such support, one needs to add
2845 * code that checks for appropriate
2846 * conditions and sets ecdh_clnt_cert to 1.
2847 * For example, the cert have an ECC
2848 * key on the same curve as the server's
2849 * and the key should be authorized for
2852 * One also needs to add code in ssl3_connect
2853 * to skip sending the certificate verify
2856 * if ((s->cert->key->privatekey != NULL) &&
2857 * (s->cert->key->privatekey->type ==
2858 * EVP_PKEY_EC) && ...)
2859 * ecdh_clnt_cert = 1;
2863 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2865 tkey = s->session->sess_cert->peer_ecdh_tmp;
2869 /* Get the Server Public Key from Cert */
2870 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2871 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2872 if ((srvr_pub_pkey == NULL) ||
2873 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2874 (srvr_pub_pkey->pkey.ec == NULL))
2876 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2877 ERR_R_INTERNAL_ERROR);
2881 tkey = srvr_pub_pkey->pkey.ec;
2884 srvr_group = EC_KEY_get0_group(tkey);
2885 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2887 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2889 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2890 ERR_R_INTERNAL_ERROR);
2894 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2896 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2900 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2902 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2907 /* Reuse key info from our certificate
2908 * We only need our private key to perform
2909 * the ECDH computation.
2911 const BIGNUM *priv_key;
2912 tkey = s->cert->key->privatekey->pkey.ec;
2913 priv_key = EC_KEY_get0_private_key(tkey);
2914 if (priv_key == NULL)
2916 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2919 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2921 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2927 /* Generate a new ECDH key pair */
2928 if (!(EC_KEY_generate_key(clnt_ecdh)))
2930 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2935 /* use the 'p' output buffer for the ECDH key, but
2936 * make sure to clear it out afterwards
2939 field_size = EC_GROUP_get_degree(srvr_group);
2940 if (field_size <= 0)
2942 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2946 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2949 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2954 /* generate master key from the result */
2955 s->session->master_key_length = s->method->ssl3_enc \
2956 -> generate_master_secret(s,
2957 s->session->master_key,
2960 memset(p, 0, n); /* clean up */
2964 /* Send empty client key exch message */
2969 /* First check the size of encoding and
2970 * allocate memory accordingly.
2973 EC_POINT_point2oct(srvr_group,
2974 EC_KEY_get0_public_key(clnt_ecdh),
2975 POINT_CONVERSION_UNCOMPRESSED,
2978 encodedPoint = (unsigned char *)
2979 OPENSSL_malloc(encoded_pt_len *
2980 sizeof(unsigned char));
2981 bn_ctx = BN_CTX_new();
2982 if ((encodedPoint == NULL) ||
2985 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2989 /* Encode the public key */
2990 n = EC_POINT_point2oct(srvr_group,
2991 EC_KEY_get0_public_key(clnt_ecdh),
2992 POINT_CONVERSION_UNCOMPRESSED,
2993 encodedPoint, encoded_pt_len, bn_ctx);
2995 *p = n; /* length of encoded point */
2996 /* Encoded point will be copied here */
2998 /* copy the point */
2999 memcpy((unsigned char *)p, encodedPoint, n);
3000 /* increment n to account for length field */
3004 /* Free allocated memory */
3005 BN_CTX_free(bn_ctx);
3006 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3007 if (clnt_ecdh != NULL)
3008 EC_KEY_free(clnt_ecdh);
3009 EVP_PKEY_free(srvr_pub_pkey);
3011 #endif /* !OPENSSL_NO_ECDH */
3012 else if (alg_k & SSL_kGOST)
3014 /* GOST key exchange message creation */
3015 EVP_PKEY_CTX *pkey_ctx;
3018 unsigned int md_len;
3020 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
3021 EVP_MD_CTX *ukm_hash;
3024 /* Get server sertificate PKEY and create ctx from it */
3025 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
3027 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
3029 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
3033 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
3034 /* If we have send a certificate, and certificate key
3036 * parameters match those of server certificate, use
3037 * certificate key for key exchange
3040 /* Otherwise, generate ephemeral key pair */
3042 EVP_PKEY_encrypt_init(pkey_ctx);
3043 /* Generate session key */
3044 RAND_bytes(premaster_secret,32);
3045 /* If we have client certificate, use its secret as peer key */
3046 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
3047 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
3048 /* If there was an error - just ignore it. Ephemeral key
3054 /* Compute shared IV and store it in algorithm-specific
3056 ukm_hash = EVP_MD_CTX_create();
3057 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
3058 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
3059 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
3060 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
3061 EVP_MD_CTX_destroy(ukm_hash);
3062 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
3064 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3068 /* Make GOST keytransport blob message */
3069 /*Encapsulate it into sequence */
3070 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
3072 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
3073 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3080 *(p++)= msglen & 0xff;
3085 *(p++)= msglen & 0xff;
3088 memcpy(p, tmp, msglen);
3089 /* Check if pubkey from client certificate was used */
3090 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
3092 /* Set flag "skip certificate verify" */
3093 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3095 EVP_PKEY_CTX_free(pkey_ctx);
3096 s->session->master_key_length=
3097 s->method->ssl3_enc->generate_master_secret(s,
3098 s->session->master_key,premaster_secret,32);
3099 EVP_PKEY_free(pub_key);
3102 #ifndef OPENSSL_NO_SRP
3103 else if (alg_k & SSL_kSRP)
3105 if (s->srp_ctx.A != NULL)
3107 /* send off the data */
3108 n=BN_num_bytes(s->srp_ctx.A);
3110 BN_bn2bin(s->srp_ctx.A,p);
3115 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3118 if (s->session->srp_username != NULL)
3119 OPENSSL_free(s->session->srp_username);
3120 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3121 if (s->session->srp_username == NULL)
3123 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3124 ERR_R_MALLOC_FAILURE);
3128 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3130 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3135 #ifndef OPENSSL_NO_PSK
3136 else if (alg_k & SSL_kPSK)
3138 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes
3139 * to return a \0-terminated identity. The last byte
3140 * is for us for simulating strnlen. */
3141 char identity[PSK_MAX_IDENTITY_LEN + 2];
3142 size_t identity_len;
3143 unsigned char *t = NULL;
3144 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3145 unsigned int pre_ms_len = 0, psk_len = 0;
3149 if (s->psk_client_callback == NULL)
3151 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3152 SSL_R_PSK_NO_CLIENT_CB);
3156 memset(identity, 0, sizeof(identity));
3157 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3158 identity, sizeof(identity) - 1,
3159 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3160 if (psk_len > PSK_MAX_PSK_LEN)
3162 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3163 ERR_R_INTERNAL_ERROR);
3166 else if (psk_len == 0)
3168 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3169 SSL_R_PSK_IDENTITY_NOT_FOUND);
3172 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
3173 identity_len = strlen(identity);
3174 if (identity_len > PSK_MAX_IDENTITY_LEN)
3176 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3177 ERR_R_INTERNAL_ERROR);
3180 /* create PSK pre_master_secret */
3181 pre_ms_len = 2+psk_len+2+psk_len;
3183 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3185 memset(t, 0, psk_len);
3189 if (s->session->psk_identity_hint != NULL)
3190 OPENSSL_free(s->session->psk_identity_hint);
3191 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3192 if (s->ctx->psk_identity_hint != NULL &&
3193 s->session->psk_identity_hint == NULL)
3195 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3196 ERR_R_MALLOC_FAILURE);
3200 if (s->session->psk_identity != NULL)
3201 OPENSSL_free(s->session->psk_identity);
3202 s->session->psk_identity = BUF_strdup(identity);
3203 if (s->session->psk_identity == NULL)
3205 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3206 ERR_R_MALLOC_FAILURE);
3210 s->session->master_key_length =
3211 s->method->ssl3_enc->generate_master_secret(s,
3212 s->session->master_key,
3213 psk_or_pre_ms, pre_ms_len);
3214 s2n(identity_len, p);
3215 memcpy(p, identity, identity_len);
3216 n = 2 + identity_len;
3219 OPENSSL_cleanse(identity, sizeof(identity));
3220 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3223 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3230 ssl3_send_alert(s, SSL3_AL_FATAL,
3231 SSL_AD_HANDSHAKE_FAILURE);
3232 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3233 ERR_R_INTERNAL_ERROR);
3237 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3238 s->state=SSL3_ST_CW_KEY_EXCH_B;
3241 /* SSL3_ST_CW_KEY_EXCH_B */
3242 return ssl_do_write(s);
3244 #ifndef OPENSSL_NO_ECDH
3245 BN_CTX_free(bn_ctx);
3246 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3247 if (clnt_ecdh != NULL)
3248 EC_KEY_free(clnt_ecdh);
3249 EVP_PKEY_free(srvr_pub_pkey);
3254 int ssl3_send_client_verify(SSL *s)
3257 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3259 EVP_PKEY_CTX *pctx=NULL;
3265 EVP_MD_CTX_init(&mctx);
3267 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3269 p= ssl_handshake_start(s);
3270 pkey=s->cert->key->privatekey;
3271 /* Create context from key and test if sha1 is allowed as digest */
3272 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3273 EVP_PKEY_sign_init(pctx);
3274 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3276 if (!SSL_USE_SIGALGS(s))
3277 s->method->ssl3_enc->cert_verify_mac(s,
3279 &(data[MD5_DIGEST_LENGTH]));
3285 /* For TLS v1.2 send signature algorithm and signature
3286 * using agreed digest and cached handshake records.
3288 if (SSL_USE_SIGALGS(s))
3292 const EVP_MD *md = s->cert->key->digest;
3293 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3295 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3297 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3298 ERR_R_INTERNAL_ERROR);
3303 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3306 if (!EVP_SignInit_ex(&mctx, md, NULL)
3307 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3308 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3310 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3316 if (!ssl3_digest_cached_records(s))
3320 #ifndef OPENSSL_NO_RSA
3321 if (pkey->type == EVP_PKEY_RSA)
3323 s->method->ssl3_enc->cert_verify_mac(s,
3326 if (RSA_sign(NID_md5_sha1, data,
3327 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3328 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3330 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3338 #ifndef OPENSSL_NO_DSA
3339 if (pkey->type == EVP_PKEY_DSA)
3341 if (!DSA_sign(pkey->save_type,
3342 &(data[MD5_DIGEST_LENGTH]),
3343 SHA_DIGEST_LENGTH,&(p[2]),
3344 (unsigned int *)&j,pkey->pkey.dsa))
3346 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3354 #ifndef OPENSSL_NO_ECDSA
3355 if (pkey->type == EVP_PKEY_EC)
3357 if (!ECDSA_sign(pkey->save_type,
3358 &(data[MD5_DIGEST_LENGTH]),
3359 SHA_DIGEST_LENGTH,&(p[2]),
3360 (unsigned int *)&j,pkey->pkey.ec))
3362 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3371 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3373 unsigned char signbuf[64];
3376 s->method->ssl3_enc->cert_verify_mac(s,
3377 NID_id_GostR3411_94,
3379 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3380 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3381 ERR_R_INTERNAL_ERROR);
3384 for (i=63,j=0; i>=0; j++, i--) {
3392 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3395 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3396 s->state=SSL3_ST_CW_CERT_VRFY_B;
3398 EVP_MD_CTX_cleanup(&mctx);
3399 EVP_PKEY_CTX_free(pctx);
3400 return ssl_do_write(s);
3402 EVP_MD_CTX_cleanup(&mctx);
3403 EVP_PKEY_CTX_free(pctx);
3407 /* Check a certificate can be used for client authentication. Currently
3408 * check cert exists, if we have a suitable digest for TLS 1.2 if
3409 * static DH client certificates can be used and optionally checks
3410 * suitability for Suite B.
3412 static int ssl3_check_client_certificate(SSL *s)
3414 unsigned long alg_k;
3415 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3417 /* If no suitable signature algorithm can't use certificate */
3418 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3420 /* If strict mode check suitability of chain before using it.
3421 * This also adjusts suite B digest if necessary.
3423 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3424 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3426 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3427 /* See if we can use client certificate for fixed DH */
3428 if (alg_k & (SSL_kDHr|SSL_kDHd))
3430 SESS_CERT *scert = s->session->sess_cert;
3431 int i = scert->peer_cert_type;
3432 EVP_PKEY *clkey = NULL, *spkey = NULL;
3433 clkey = s->cert->key->privatekey;
3434 /* If client key not DH assume it can be used */
3435 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3438 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3441 /* Compare server and client parameters */
3442 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3443 EVP_PKEY_free(spkey);
3447 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3452 int ssl3_send_client_certificate(SSL *s)
3455 EVP_PKEY *pkey=NULL;
3458 if (s->state == SSL3_ST_CW_CERT_A)
3460 /* Let cert callback update client certificates if required */
3461 if (s->cert->cert_cb)
3463 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3466 s->rwstate=SSL_X509_LOOKUP;
3471 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3474 s->rwstate=SSL_NOTHING;
3476 if (ssl3_check_client_certificate(s))
3477 s->state=SSL3_ST_CW_CERT_C;
3479 s->state=SSL3_ST_CW_CERT_B;
3482 /* We need to get a client cert */
3483 if (s->state == SSL3_ST_CW_CERT_B)
3485 /* If we get an error, we need to
3486 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3487 * We then get retied later */
3489 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3492 s->rwstate=SSL_X509_LOOKUP;
3495 s->rwstate=SSL_NOTHING;
3496 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3498 s->state=SSL3_ST_CW_CERT_B;
3499 if ( !SSL_use_certificate(s,x509) ||
3500 !SSL_use_PrivateKey(s,pkey))
3506 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3509 if (x509 != NULL) X509_free(x509);
3510 if (pkey != NULL) EVP_PKEY_free(pkey);
3511 if (i && !ssl3_check_client_certificate(s))
3515 if (s->version == SSL3_VERSION)
3517 s->s3->tmp.cert_req=0;
3518 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3523 s->s3->tmp.cert_req=2;
3527 /* Ok, we have a cert */
3528 s->state=SSL3_ST_CW_CERT_C;
3531 if (s->state == SSL3_ST_CW_CERT_C)
3533 s->state=SSL3_ST_CW_CERT_D;
3534 if (!ssl3_output_cert_chain(s,
3535 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3537 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3538 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3542 /* SSL3_ST_CW_CERT_D */
3543 return ssl_do_write(s);
3546 #define has_bits(i,m) (((i)&(m)) == (m))
3548 int ssl3_check_cert_and_algorithm(SSL *s)
3552 EVP_PKEY *pkey=NULL;
3554 #ifndef OPENSSL_NO_RSA
3557 #ifndef OPENSSL_NO_DH
3561 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3562 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3564 /* we don't have a certificate */
3565 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3568 sc=s->session->sess_cert;
3571 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3575 #ifndef OPENSSL_NO_RSA
3576 rsa=s->session->sess_cert->peer_rsa_tmp;
3578 #ifndef OPENSSL_NO_DH
3579 dh=s->session->sess_cert->peer_dh_tmp;
3582 /* This is the passed certificate */
3584 idx=sc->peer_cert_type;
3585 #ifndef OPENSSL_NO_ECDH
3586 if (idx == SSL_PKEY_ECC)
3588 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3590 { /* check failed */
3591 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3599 else if (alg_a & SSL_aECDSA)
3601 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3604 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3606 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3610 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3611 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3612 EVP_PKEY_free(pkey);
3615 /* Check that we have a certificate if we require one */
3616 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3618 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3621 #ifndef OPENSSL_NO_DSA
3622 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3624 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3628 #ifndef OPENSSL_NO_RSA
3629 if ((alg_k & SSL_kRSA) &&
3630 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3632 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3636 #ifndef OPENSSL_NO_DH
3637 if ((alg_k & SSL_kDHE) &&
3638 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3640 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3643 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3644 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3646 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3649 #ifndef OPENSSL_NO_DSA
3650 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3651 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3653 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3659 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3661 #ifndef OPENSSL_NO_RSA
3662 if (alg_k & SSL_kRSA)
3665 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3667 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3673 #ifndef OPENSSL_NO_DH
3674 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3677 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3679 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3686 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3692 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3697 /* Check to see if handshake is full or resumed. Usually this is just a
3698 * case of checking to see if a cache hit has occurred. In the case of
3699 * session tickets we have to check the next message to be sure.
3702 #ifndef OPENSSL_NO_TLSEXT
3703 # ifndef OPENSSL_NO_NEXTPROTONEG
3704 int ssl3_send_next_proto(SSL *s)
3706 unsigned int len, padding_len;
3709 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3711 len = s->next_proto_negotiated_len;
3712 padding_len = 32 - ((len + 2) % 32);
3713 d = (unsigned char *)s->init_buf->data;
3715 memcpy(d + 5, s->next_proto_negotiated, len);
3716 d[5 + len] = padding_len;
3717 memset(d + 6 + len, 0, padding_len);
3718 *(d++)=SSL3_MT_NEXT_PROTO;
3719 l2n3(2 + len + padding_len, d);
3720 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3721 s->init_num = 4 + 2 + len + padding_len;
3725 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3729 int ssl3_check_finished(SSL *s)
3734 /* If we have no ticket it cannot be a resumed session. */
3735 if (!s->session->tlsext_tick)
3737 /* this function is called when we really expect a Certificate
3738 * message, so permit appropriate message length */
3739 n=s->method->ssl_get_message(s,
3745 if (!ok) return((int)n);
3746 s->s3->tmp.reuse_message = 1;
3748 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3749 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3756 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3759 #ifndef OPENSSL_NO_ENGINE
3760 if (s->ctx->client_cert_engine)
3762 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3763 SSL_get_client_CA_list(s),
3764 px509, ppkey, NULL, NULL, NULL);
3769 if (s->ctx->client_cert_cb)
3770 i = s->ctx->client_cert_cb(s,px509,ppkey);