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++;
232 case SSL_ST_BEFORE|SSL_ST_CONNECT:
233 case SSL_ST_OK|SSL_ST_CONNECT:
236 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
238 if ((s->version & 0xff00 ) != 0x0300)
240 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
245 /* s->version=SSL3_VERSION; */
246 s->type=SSL_ST_CONNECT;
248 if (s->init_buf == NULL)
250 if ((buf=BUF_MEM_new()) == NULL)
255 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
264 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
266 /* setup buffing BIO */
267 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
269 /* don't push the buffering BIO quite yet */
271 ssl3_init_finished_mac(s);
273 s->state=SSL3_ST_CW_CLNT_HELLO_A;
274 s->ctx->stats.sess_connect++;
278 case SSL3_ST_CW_CLNT_HELLO_A:
279 case SSL3_ST_CW_CLNT_HELLO_B:
282 ret=ssl3_client_hello(s);
283 if (ret <= 0) goto end;
284 s->state=SSL3_ST_CR_SRVR_HELLO_A;
287 /* turn on buffering for the next lot of output */
288 if (s->bbio != s->wbio)
289 s->wbio=BIO_push(s->bbio,s->wbio);
293 case SSL3_ST_CR_SRVR_HELLO_A:
294 case SSL3_ST_CR_SRVR_HELLO_B:
295 ret=ssl3_get_server_hello(s);
296 if (ret <= 0) goto end;
300 s->state=SSL3_ST_CR_FINISHED_A;
301 #ifndef OPENSSL_NO_TLSEXT
302 if (s->tlsext_ticket_expected)
304 /* receive renewed session ticket */
305 s->state=SSL3_ST_CR_SESSION_TICKET_A;
311 s->state=SSL3_ST_CR_CERT_A;
315 case SSL3_ST_CR_CERT_A:
316 case SSL3_ST_CR_CERT_B:
317 /* Check if it is anon DH/ECDH, SRP auth */
319 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) &&
320 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
322 ret=ssl3_get_server_certificate(s);
323 if (ret <= 0) goto end;
324 #ifndef OPENSSL_NO_TLSEXT
325 if (s->tlsext_status_expected)
326 s->state=SSL3_ST_CR_CERT_STATUS_A;
328 s->state=SSL3_ST_CR_KEY_EXCH_A;
333 s->state=SSL3_ST_CR_KEY_EXCH_A;
340 s->state=SSL3_ST_CR_KEY_EXCH_A;
345 case SSL3_ST_CR_KEY_EXCH_A:
346 case SSL3_ST_CR_KEY_EXCH_B:
347 ret=ssl3_get_key_exchange(s);
348 if (ret <= 0) goto end;
349 s->state=SSL3_ST_CR_CERT_REQ_A;
352 /* at this point we check that we have the
353 * required stuff from the server */
354 if (!ssl3_check_cert_and_algorithm(s))
361 case SSL3_ST_CR_CERT_REQ_A:
362 case SSL3_ST_CR_CERT_REQ_B:
363 ret=ssl3_get_certificate_request(s);
364 if (ret <= 0) goto end;
365 s->state=SSL3_ST_CR_SRVR_DONE_A;
369 case SSL3_ST_CR_SRVR_DONE_A:
370 case SSL3_ST_CR_SRVR_DONE_B:
371 ret=ssl3_get_server_done(s);
372 if (ret <= 0) goto end;
373 #ifndef OPENSSL_NO_SRP
374 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
376 if ((ret = SRP_Calc_A_param(s))<=0)
378 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
379 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
384 if (s->s3->tmp.cert_req)
385 s->state=SSL3_ST_CW_CERT_A;
387 s->state=SSL3_ST_CW_KEY_EXCH_A;
392 case SSL3_ST_CW_CERT_A:
393 case SSL3_ST_CW_CERT_B:
394 case SSL3_ST_CW_CERT_C:
395 case SSL3_ST_CW_CERT_D:
396 ret=ssl3_send_client_certificate(s);
397 if (ret <= 0) goto end;
398 s->state=SSL3_ST_CW_KEY_EXCH_A;
402 case SSL3_ST_CW_KEY_EXCH_A:
403 case SSL3_ST_CW_KEY_EXCH_B:
404 ret=ssl3_send_client_key_exchange(s);
405 if (ret <= 0) goto end;
406 /* EAY EAY EAY need to check for DH fix cert
408 /* For TLS, cert_req is set to 2, so a cert chain
409 * of nothing is sent, but no verify packet is sent */
410 /* XXX: For now, we do not support client
411 * authentication in ECDH cipher suites with
412 * ECDH (rather than ECDSA) certificates.
413 * We need to skip the certificate verify
414 * message when client's ECDH public key is sent
415 * inside the client certificate.
417 if (s->s3->tmp.cert_req == 1)
419 s->state=SSL3_ST_CW_CERT_VRFY_A;
423 s->state=SSL3_ST_CW_CHANGE_A;
424 s->s3->change_cipher_spec=0;
426 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
428 s->state=SSL3_ST_CW_CHANGE_A;
429 s->s3->change_cipher_spec=0;
435 case SSL3_ST_CW_CERT_VRFY_A:
436 case SSL3_ST_CW_CERT_VRFY_B:
437 ret=ssl3_send_client_verify(s);
438 if (ret <= 0) goto end;
439 s->state=SSL3_ST_CW_CHANGE_A;
441 s->s3->change_cipher_spec=0;
444 case SSL3_ST_CW_CHANGE_A:
445 case SSL3_ST_CW_CHANGE_B:
446 ret=ssl3_send_change_cipher_spec(s,
447 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
448 if (ret <= 0) goto end;
450 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
451 s->state=SSL3_ST_CW_FINISHED_A;
453 if (s->s3->next_proto_neg_seen)
454 s->state=SSL3_ST_CW_NEXT_PROTO_A;
456 s->state=SSL3_ST_CW_FINISHED_A;
460 s->session->cipher=s->s3->tmp.new_cipher;
461 #ifdef OPENSSL_NO_COMP
462 s->session->compress_meth=0;
464 if (s->s3->tmp.new_compression == NULL)
465 s->session->compress_meth=0;
467 s->session->compress_meth=
468 s->s3->tmp.new_compression->id;
470 if (!s->method->ssl3_enc->setup_key_block(s))
476 if (!s->method->ssl3_enc->change_cipher_state(s,
477 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
485 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
486 case SSL3_ST_CW_NEXT_PROTO_A:
487 case SSL3_ST_CW_NEXT_PROTO_B:
488 ret=ssl3_send_next_proto(s);
489 if (ret <= 0) goto end;
490 s->state=SSL3_ST_CW_FINISHED_A;
494 case SSL3_ST_CW_FINISHED_A:
495 case SSL3_ST_CW_FINISHED_B:
496 ret=ssl3_send_finished(s,
497 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
498 s->method->ssl3_enc->client_finished_label,
499 s->method->ssl3_enc->client_finished_label_len);
500 if (ret <= 0) goto end;
501 s->s3->flags |= SSL3_FLAGS_CCS_OK;
502 s->state=SSL3_ST_CW_FLUSH;
505 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
508 s->s3->tmp.next_state=SSL_ST_OK;
509 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
512 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
513 s->s3->delay_buf_pop_ret=0;
518 #ifndef OPENSSL_NO_TLSEXT
519 /* Allow NewSessionTicket if ticket expected */
520 if (s->tlsext_ticket_expected)
521 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
525 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
530 #ifndef OPENSSL_NO_TLSEXT
531 case SSL3_ST_CR_SESSION_TICKET_A:
532 case SSL3_ST_CR_SESSION_TICKET_B:
533 ret=ssl3_get_new_session_ticket(s);
534 if (ret <= 0) goto end;
535 s->state=SSL3_ST_CR_FINISHED_A;
539 case SSL3_ST_CR_CERT_STATUS_A:
540 case SSL3_ST_CR_CERT_STATUS_B:
541 ret=ssl3_get_cert_status(s);
542 if (ret <= 0) goto end;
543 s->state=SSL3_ST_CR_KEY_EXCH_A;
548 case SSL3_ST_CR_FINISHED_A:
549 case SSL3_ST_CR_FINISHED_B:
551 s->s3->flags |= SSL3_FLAGS_CCS_OK;
552 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
553 SSL3_ST_CR_FINISHED_B);
554 if (ret <= 0) goto end;
557 s->state=SSL3_ST_CW_CHANGE_A;
563 case SSL3_ST_CW_FLUSH:
564 s->rwstate=SSL_WRITING;
565 if (BIO_flush(s->wbio) <= 0)
570 s->rwstate=SSL_NOTHING;
571 s->state=s->s3->tmp.next_state;
575 /* clean a few things up */
576 ssl3_cleanup_key_block(s);
578 if (s->init_buf != NULL)
580 BUF_MEM_free(s->init_buf);
584 /* If we are not 'joining' the last two packets,
585 * remove the buffering now */
586 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
587 ssl_free_wbio_buffer(s);
588 /* else do it later in ssl3_write */
594 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
595 if (s->hit) s->ctx->stats.sess_hit++;
599 s->handshake_func=ssl3_connect;
600 s->ctx->stats.sess_connect_good++;
602 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
608 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
614 /* did we do anything */
615 if (!s->s3->tmp.reuse_message && !skip)
619 if ((ret=BIO_flush(s->wbio)) <= 0)
623 if ((cb != NULL) && (s->state != state))
627 cb(s,SSL_CB_CONNECT_LOOP,1);
638 cb(s,SSL_CB_CONNECT_EXIT,ret);
643 int ssl3_client_hello(SSL *s)
650 #ifndef OPENSSL_NO_COMP
655 buf=(unsigned char *)s->init_buf->data;
656 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
658 SSL_SESSION *sess = s->session;
659 if ((sess == NULL) ||
660 (sess->ssl_version != s->version) ||
661 !sess->session_id_length ||
662 (sess->not_resumable))
664 if (!ssl_get_new_session(s,0))
667 if (s->method->version == DTLS_ANY_VERSION)
669 /* Determine which DTLS version to use */
670 int options = s->options;
671 /* If DTLS 1.2 disabled correct the version number */
672 if (options & SSL_OP_NO_DTLSv1_2)
676 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
679 /* Disabling all versions is silly: return an
682 if (options & SSL_OP_NO_DTLSv1)
684 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
687 /* Update method so we don't use any DTLS 1.2
690 s->method = DTLSv1_client_method();
691 s->version = DTLS1_VERSION;
695 /* We only support one version: update method */
696 if (options & SSL_OP_NO_DTLSv1)
697 s->method = DTLSv1_2_client_method();
698 s->version = DTLS1_2_VERSION;
700 s->client_version = s->version;
702 /* else use the pre-loaded session */
704 p=s->s3->client_random;
706 /* for DTLS if client_random is initialized, reuse it, we are
707 * required to use same upon reply to HelloVerify */
712 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
725 ssl_fill_hello_random(s, 0, p,
726 sizeof(s->s3->client_random));
728 /* Do the message type and length last */
729 d=p= ssl_handshake_start(s);
731 /* version indicates the negotiated version: for example from
732 * an SSLv2/v3 compatible client hello). The client_version
733 * field is the maximum version we permit and it is also
734 * used in RSA encrypted premaster secrets. Some servers can
735 * choke if we initially report a higher version then
736 * renegotiate to a lower one in the premaster secret. This
737 * didn't happen with TLS 1.0 as most servers supported it
738 * but it can with TLS 1.1 or later if the server only supports
741 * Possible scenario with previous logic:
742 * 1. Client hello indicates TLS 1.2
743 * 2. Server hello says TLS 1.0
744 * 3. RSA encrypted premaster secret uses 1.2.
745 * 4. Handhaked proceeds using TLS 1.0.
746 * 5. Server sends hello request to renegotiate.
747 * 6. Client hello indicates TLS v1.0 as we now
748 * know that is maximum server supports.
749 * 7. Server chokes on RSA encrypted premaster secret
750 * containing version 1.0.
752 * For interoperability it should be OK to always use the
753 * maximum version we support in client hello and then rely
754 * on the checking of version to ensure the servers isn't
755 * being inconsistent: for example initially negotiating with
756 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
757 * client_version in client hello and not resetting it to
758 * the negotiated version.
761 *(p++)=s->version>>8;
762 *(p++)=s->version&0xff;
763 s->client_version=s->version;
765 *(p++)=s->client_version>>8;
766 *(p++)=s->client_version&0xff;
770 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
777 i=s->session->session_id_length;
781 if (i > (int)sizeof(s->session->session_id))
783 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
786 memcpy(p,s->session->session_id,i);
790 /* cookie stuff for DTLS */
793 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
795 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
798 *(p++) = s->d1->cookie_len;
799 memcpy(p, s->d1->cookie, s->d1->cookie_len);
800 p += s->d1->cookie_len;
803 /* Ciphers supported */
804 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
807 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
810 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
811 /* Some servers hang if client hello > 256 bytes
812 * as hack workaround chop number of supported ciphers
813 * to keep it well below this if we use TLS v1.2
815 if (TLS1_get_version(s) >= TLS1_2_VERSION
816 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
817 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
823 #ifdef OPENSSL_NO_COMP
827 if ((s->options & SSL_OP_NO_COMPRESSION)
828 || !s->ctx->comp_methods)
831 j=sk_SSL_COMP_num(s->ctx->comp_methods);
835 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
839 *(p++)=0; /* Add the NULL method */
841 #ifndef OPENSSL_NO_TLSEXT
843 if (ssl_prepare_clienthello_tlsext(s) <= 0)
845 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
848 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
850 ssl3_send_alert(s,SSL3_AL_FATAL,al);
851 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
857 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
858 s->state=SSL3_ST_CW_CLNT_HELLO_B;
861 /* SSL3_ST_CW_CLNT_HELLO_B */
862 return ssl_do_write(s);
867 int ssl3_get_server_hello(SSL *s)
869 STACK_OF(SSL_CIPHER) *sk;
873 int i,al=SSL_AD_INTERNAL_ERROR,ok;
876 #ifndef OPENSSL_NO_COMP
879 /* Hello verify request and/or server hello version may not
880 * match so set first packet if we're negotiating version.
885 n=s->method->ssl_get_message(s,
886 SSL3_ST_CR_SRVR_HELLO_A,
887 SSL3_ST_CR_SRVR_HELLO_B,
892 if (!ok) return((int)n);
897 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
899 if ( s->d1->send_cookie == 0)
901 s->s3->tmp.reuse_message = 1;
904 else /* already sent a cookie */
906 al=SSL_AD_UNEXPECTED_MESSAGE;
907 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
913 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
915 al=SSL_AD_UNEXPECTED_MESSAGE;
916 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
920 d=p=(unsigned char *)s->init_msg;
921 if (s->method->version == DTLS_ANY_VERSION)
923 /* Work out correct protocol version to use */
924 int hversion = (p[0] << 8)|p[1];
925 int options = s->options;
926 if (hversion == DTLS1_2_VERSION
927 && !(options & SSL_OP_NO_DTLSv1_2))
928 s->method = DTLSv1_2_client_method();
929 else if (tls1_suiteb(s))
931 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
932 s->version = hversion;
933 al = SSL_AD_PROTOCOL_VERSION;
936 else if (hversion == DTLS1_VERSION
937 && !(options & SSL_OP_NO_DTLSv1))
938 s->method = DTLSv1_client_method();
941 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
942 s->version = hversion;
943 al = SSL_AD_PROTOCOL_VERSION;
946 s->version = s->client_version = s->method->version;
949 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
951 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
952 s->version=(s->version&0xff00)|p[1];
953 al=SSL_AD_PROTOCOL_VERSION;
958 /* load the server hello data */
959 /* load the server random */
960 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
965 /* get the session-id */
968 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
970 al=SSL_AD_ILLEGAL_PARAMETER;
971 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
975 #ifndef OPENSSL_NO_TLSEXT
976 /* check if we want to resume the session based on external pre-shared secret */
977 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
979 SSL_CIPHER *pref_cipher=NULL;
980 s->session->master_key_length=sizeof(s->session->master_key);
981 if (s->tls_session_secret_cb(s, s->session->master_key,
982 &s->session->master_key_length,
984 s->tls_session_secret_cb_arg))
986 s->session->cipher = pref_cipher ?
987 pref_cipher : ssl_get_cipher_by_char(s, p+j);
989 s->s3->flags |= SSL3_FLAGS_CCS_OK;
992 #endif /* OPENSSL_NO_TLSEXT */
994 if (!s->hit && j != 0 && j == s->session->session_id_length
995 && memcmp(p,s->session->session_id,j) == 0)
997 if(s->sid_ctx_length != s->session->sid_ctx_length
998 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1000 /* actually a client application bug */
1001 al=SSL_AD_ILLEGAL_PARAMETER;
1002 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1005 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1008 /* a miss or crap from the other end */
1011 /* If we were trying for session-id reuse, make a new
1012 * SSL_SESSION so we don't stuff up other people */
1013 if (s->session->session_id_length > 0)
1015 if (!ssl_get_new_session(s,0))
1020 s->session->session_id_length=j;
1021 memcpy(s->session->session_id,p,j); /* j could be 0 */
1024 c=ssl_get_cipher_by_char(s,p);
1027 /* unknown cipher */
1028 al=SSL_AD_ILLEGAL_PARAMETER;
1029 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1032 /* If it is a disabled cipher we didn't send it in client hello,
1033 * so return an error.
1035 if (c->algorithm_ssl & ct->mask_ssl ||
1036 c->algorithm_mkey & ct->mask_k ||
1037 c->algorithm_auth & ct->mask_a)
1039 al=SSL_AD_ILLEGAL_PARAMETER;
1040 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1043 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1045 sk=ssl_get_ciphers_by_id(s);
1046 i=sk_SSL_CIPHER_find(sk,c);
1049 /* we did not say we would use this cipher */
1050 al=SSL_AD_ILLEGAL_PARAMETER;
1051 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1055 /* Depending on the session caching (internal/external), the cipher
1056 and/or cipher_id values may not be set. Make sure that
1057 cipher_id is set and use it for comparison. */
1058 if (s->session->cipher)
1059 s->session->cipher_id = s->session->cipher->id;
1060 if (s->hit && (s->session->cipher_id != c->id))
1062 /* Workaround is now obsolete */
1065 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1068 al=SSL_AD_ILLEGAL_PARAMETER;
1069 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1073 s->s3->tmp.new_cipher=c;
1074 /* Don't digest cached records if no sigalgs: we may need them for
1075 * client authentication.
1077 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1079 /* lets get the compression algorithm */
1081 #ifdef OPENSSL_NO_COMP
1084 al=SSL_AD_ILLEGAL_PARAMETER;
1085 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1088 /* If compression is disabled we'd better not try to resume a session
1089 * using compression.
1091 if (s->session->compress_meth != 0)
1093 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1098 if (s->hit && j != s->session->compress_meth)
1100 al=SSL_AD_ILLEGAL_PARAMETER;
1101 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1106 else if (s->options & SSL_OP_NO_COMPRESSION)
1108 al=SSL_AD_ILLEGAL_PARAMETER;
1109 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1113 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1115 if ((j != 0) && (comp == NULL))
1117 al=SSL_AD_ILLEGAL_PARAMETER;
1118 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1123 s->s3->tmp.new_compression=comp;
1127 #ifndef OPENSSL_NO_TLSEXT
1129 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1131 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1138 /* wrong packet length */
1139 al=SSL_AD_DECODE_ERROR;
1140 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1146 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1151 int ssl3_get_server_certificate(SSL *s)
1153 int al,i,ok,ret= -1;
1154 unsigned long n,nc,llen,l;
1156 const unsigned char *q,*p;
1158 STACK_OF(X509) *sk=NULL;
1160 EVP_PKEY *pkey=NULL;
1161 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1163 n=s->method->ssl_get_message(s,
1170 if (!ok) return((int)n);
1172 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1173 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1174 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1176 s->s3->tmp.reuse_message=1;
1180 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1182 al=SSL_AD_UNEXPECTED_MESSAGE;
1183 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1186 p=d=(unsigned char *)s->init_msg;
1188 if ((sk=sk_X509_new_null()) == NULL)
1190 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1197 al=SSL_AD_DECODE_ERROR;
1198 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1201 for (nc=0; nc<llen; )
1204 if ((l+nc+3) > llen)
1206 al=SSL_AD_DECODE_ERROR;
1207 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1212 x=d2i_X509(NULL,&q,l);
1215 al=SSL_AD_BAD_CERTIFICATE;
1216 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1221 al=SSL_AD_DECODE_ERROR;
1222 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1225 if (!sk_X509_push(sk,x))
1227 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1235 i=ssl_verify_cert_chain(s,sk);
1236 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1237 #ifndef OPENSSL_NO_KRB5
1238 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1239 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1240 #endif /* OPENSSL_NO_KRB5 */
1243 al=ssl_verify_alarm_type(s->verify_result);
1244 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1247 ERR_clear_error(); /* but we keep s->verify_result */
1249 sc=ssl_sess_cert_new();
1250 if (sc == NULL) goto err;
1252 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1253 s->session->sess_cert=sc;
1256 /* Inconsistency alert: cert_chain does include the peer's
1257 * certificate, which we don't include in s3_srvr.c */
1258 x=sk_X509_value(sk,0);
1260 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1262 pkey=X509_get_pubkey(x);
1264 /* VRS: allow null cert if auth == KRB5 */
1265 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1266 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1270 printf("pkey,x = %p, %p\n", pkey,x);
1271 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1272 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1273 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1274 #endif /* KSSL_DEBUG */
1276 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1280 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1281 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1285 i=ssl_cert_type(x,pkey);
1286 if (need_cert && i < 0)
1290 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1291 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1297 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1298 if (exp_idx >= 0 && i != exp_idx)
1301 al=SSL_AD_ILLEGAL_PARAMETER;
1302 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1303 SSL_R_WRONG_CERTIFICATE_TYPE);
1306 sc->peer_cert_type=i;
1307 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1308 /* Why would the following ever happen?
1309 * We just created sc a couple of lines ago. */
1310 if (sc->peer_pkeys[i].x509 != NULL)
1311 X509_free(sc->peer_pkeys[i].x509);
1312 sc->peer_pkeys[i].x509=x;
1313 sc->peer_key= &(sc->peer_pkeys[i]);
1315 if (s->session->peer != NULL)
1316 X509_free(s->session->peer);
1317 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1322 sc->peer_cert_type=i;
1325 if (s->session->peer != NULL)
1326 X509_free(s->session->peer);
1327 s->session->peer=NULL;
1329 s->session->verify_result = s->verify_result;
1336 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1339 EVP_PKEY_free(pkey);
1341 sk_X509_pop_free(sk,X509_free);
1345 int ssl3_get_key_exchange(SSL *s)
1347 #ifndef OPENSSL_NO_RSA
1348 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1351 unsigned char *param,*p;
1353 long i,param_len,n,alg_k,alg_a;
1354 EVP_PKEY *pkey=NULL;
1355 const EVP_MD *md = NULL;
1356 #ifndef OPENSSL_NO_RSA
1359 #ifndef OPENSSL_NO_DH
1362 #ifndef OPENSSL_NO_ECDH
1363 EC_KEY *ecdh = NULL;
1364 BN_CTX *bn_ctx = NULL;
1365 EC_POINT *srvr_ecpoint = NULL;
1367 int encoded_pt_len = 0;
1370 /* use same message size as in ssl3_get_certificate_request()
1371 * as ServerKeyExchange message may be skipped */
1372 n=s->method->ssl_get_message(s,
1373 SSL3_ST_CR_KEY_EXCH_A,
1374 SSL3_ST_CR_KEY_EXCH_B,
1378 if (!ok) return((int)n);
1380 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1382 #ifndef OPENSSL_NO_PSK
1383 /* In plain PSK ciphersuite, ServerKeyExchange can be
1384 omitted if no identity hint is sent. Set
1385 session->sess_cert anyway to avoid problems
1387 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1389 s->session->sess_cert=ssl_sess_cert_new();
1390 if (s->ctx->psk_identity_hint)
1391 OPENSSL_free(s->ctx->psk_identity_hint);
1392 s->ctx->psk_identity_hint = NULL;
1395 s->s3->tmp.reuse_message=1;
1399 param=p=(unsigned char *)s->init_msg;
1400 if (s->session->sess_cert != NULL)
1402 #ifndef OPENSSL_NO_RSA
1403 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1405 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1406 s->session->sess_cert->peer_rsa_tmp=NULL;
1409 #ifndef OPENSSL_NO_DH
1410 if (s->session->sess_cert->peer_dh_tmp)
1412 DH_free(s->session->sess_cert->peer_dh_tmp);
1413 s->session->sess_cert->peer_dh_tmp=NULL;
1416 #ifndef OPENSSL_NO_ECDH
1417 if (s->session->sess_cert->peer_ecdh_tmp)
1419 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1420 s->session->sess_cert->peer_ecdh_tmp=NULL;
1426 s->session->sess_cert=ssl_sess_cert_new();
1429 /* Total length of the parameters including the length prefix */
1432 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1433 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1434 EVP_MD_CTX_init(&md_ctx);
1436 al=SSL_AD_DECODE_ERROR;
1438 #ifndef OPENSSL_NO_PSK
1439 if (alg_k & SSL_kPSK)
1441 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1446 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1447 SSL_R_LENGTH_TOO_SHORT);
1452 /* Store PSK identity hint for later use, hint is used
1453 * in ssl3_send_client_key_exchange. Assume that the
1454 * maximum length of a PSK identity hint can be as
1455 * long as the maximum length of a PSK identity. */
1456 if (i > PSK_MAX_IDENTITY_LEN)
1458 al=SSL_AD_HANDSHAKE_FAILURE;
1459 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1460 SSL_R_DATA_LENGTH_TOO_LONG);
1463 if (i > n - param_len)
1465 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1466 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1471 /* If received PSK identity hint contains NULL
1472 * characters, the hint is truncated from the first
1473 * NULL. p may not be ending with NULL, so create a
1474 * NULL-terminated string. */
1475 memcpy(tmp_id_hint, p, i);
1476 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1477 if (s->ctx->psk_identity_hint != NULL)
1478 OPENSSL_free(s->ctx->psk_identity_hint);
1479 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1480 if (s->ctx->psk_identity_hint == NULL)
1482 al=SSL_AD_HANDSHAKE_FAILURE;
1483 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1491 #endif /* !OPENSSL_NO_PSK */
1492 #ifndef OPENSSL_NO_SRP
1493 if (alg_k & SSL_kSRP)
1498 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1499 SSL_R_LENGTH_TOO_SHORT);
1504 if (i > n - param_len)
1506 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1511 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1513 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1519 if (2 > n - param_len)
1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1522 SSL_R_LENGTH_TOO_SHORT);
1529 if (i > n - param_len)
1531 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1536 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1538 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1544 if (1 > n - param_len)
1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1547 SSL_R_LENGTH_TOO_SHORT);
1552 i = (unsigned int)(p[0]);
1555 if (i > n - param_len)
1557 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1562 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1564 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1569 if (2 > n - param_len)
1571 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1572 SSL_R_LENGTH_TOO_SHORT);
1579 if (i > n - param_len)
1581 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1586 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1588 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1594 if (!srp_verify_server_param(s, &al))
1596 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1600 /* We must check if there is a certificate */
1601 #ifndef OPENSSL_NO_RSA
1602 if (alg_a & SSL_aRSA)
1603 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1608 #ifndef OPENSSL_NO_DSA
1609 else if (alg_a & SSL_aDSS)
1610 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1614 #endif /* !OPENSSL_NO_SRP */
1615 #ifndef OPENSSL_NO_RSA
1616 if (alg_k & SSL_kRSA)
1618 if ((rsa=RSA_new()) == NULL)
1620 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1627 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1628 SSL_R_LENGTH_TOO_SHORT);
1633 if (i > n - param_len)
1635 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1640 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1642 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1647 if (2 > n - param_len)
1649 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1650 SSL_R_LENGTH_TOO_SHORT);
1657 if (i > n - param_len)
1659 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1664 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1666 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1672 /* this should be because we are using an export cipher */
1673 if (alg_a & SSL_aRSA)
1674 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1677 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1680 s->session->sess_cert->peer_rsa_tmp=rsa;
1683 #else /* OPENSSL_NO_RSA */
1687 #ifndef OPENSSL_NO_DH
1688 else if (alg_k & SSL_kEDH)
1690 if ((dh=DH_new()) == NULL)
1692 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1699 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1700 SSL_R_LENGTH_TOO_SHORT);
1705 if (i > n - param_len)
1707 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1712 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1714 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1719 if (2 > n - param_len)
1721 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1722 SSL_R_LENGTH_TOO_SHORT);
1729 if (i > n - param_len)
1731 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1736 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1738 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1743 if (2 > n - param_len)
1745 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1746 SSL_R_LENGTH_TOO_SHORT);
1753 if (i > n - param_len)
1755 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1760 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1762 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1768 #ifndef OPENSSL_NO_RSA
1769 if (alg_a & SSL_aRSA)
1770 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1775 #ifndef OPENSSL_NO_DSA
1776 else if (alg_a & SSL_aDSS)
1777 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1779 /* else anonymous DH, so no certificate or pkey. */
1781 s->session->sess_cert->peer_dh_tmp=dh;
1784 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1786 al=SSL_AD_ILLEGAL_PARAMETER;
1787 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1790 #endif /* !OPENSSL_NO_DH */
1792 #ifndef OPENSSL_NO_ECDH
1793 else if (alg_k & SSL_kEECDH)
1796 const EC_GROUP *group;
1798 if ((ecdh=EC_KEY_new()) == NULL)
1800 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1804 /* Extract elliptic curve parameters and the
1805 * server's ephemeral ECDH public key.
1806 * Keep accumulating lengths of various components in
1807 * param_len and make sure it never exceeds n.
1810 /* XXX: For now we only support named (not generic) curves
1811 * and the ECParameters in this case is just three bytes. We
1812 * also need one byte for the length of the encoded point
1817 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1818 SSL_R_LENGTH_TOO_SHORT);
1821 /* Check curve is one of our preferences, if not server has
1822 * sent an invalid curve. ECParameters is 3 bytes.
1824 if (!tls1_check_curve(s, p, 3))
1826 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1830 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1832 al=SSL_AD_INTERNAL_ERROR;
1833 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1837 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1840 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1843 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1845 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1848 EC_GROUP_free(ngroup);
1850 group = EC_KEY_get0_group(ecdh);
1852 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1853 (EC_GROUP_get_degree(group) > 163))
1855 al=SSL_AD_EXPORT_RESTRICTION;
1856 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1862 /* Next, get the encoded ECPoint */
1863 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1864 ((bn_ctx = BN_CTX_new()) == NULL))
1866 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1870 encoded_pt_len = *p; /* length of encoded point */
1873 if ((encoded_pt_len > n - param_len) ||
1874 (EC_POINT_oct2point(group, srvr_ecpoint,
1875 p, encoded_pt_len, bn_ctx) == 0))
1877 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1880 param_len += encoded_pt_len;
1885 /* The ECC/TLS specification does not mention
1886 * the use of DSA to sign ECParameters in the server
1887 * key exchange message. We do support RSA and ECDSA.
1890 #ifndef OPENSSL_NO_RSA
1891 else if (alg_a & SSL_aRSA)
1892 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1894 #ifndef OPENSSL_NO_ECDSA
1895 else if (alg_a & SSL_aECDSA)
1896 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1898 /* else anonymous ECDH, so no certificate or pkey. */
1899 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1900 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1902 BN_CTX_free(bn_ctx);
1904 EC_POINT_free(srvr_ecpoint);
1905 srvr_ecpoint = NULL;
1909 al=SSL_AD_UNEXPECTED_MESSAGE;
1910 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1913 #endif /* !OPENSSL_NO_ECDH */
1916 /* p points to the next byte, there are 'n' bytes left */
1918 /* if it was signed, check the signature */
1921 if (SSL_USE_SIGALGS(s))
1926 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1927 SSL_R_LENGTH_TOO_SHORT);
1930 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1938 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1948 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1949 SSL_R_LENGTH_TOO_SHORT);
1954 j=EVP_PKEY_size(pkey);
1956 /* Check signature length. If n is 0 then signature is empty */
1957 if ((i != n) || (n > j) || (n <= 0))
1959 /* wrong packet length */
1960 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1964 #ifndef OPENSSL_NO_RSA
1965 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1972 for (num=2; num > 0; num--)
1974 EVP_MD_CTX_set_flags(&md_ctx,
1975 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1976 EVP_DigestInit_ex(&md_ctx,(num == 2)
1977 ?s->ctx->md5:s->ctx->sha1, NULL);
1978 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1979 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1980 EVP_DigestUpdate(&md_ctx,param,param_len);
1981 EVP_DigestFinal_ex(&md_ctx,q,&size);
1985 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1989 al=SSL_AD_DECRYPT_ERROR;
1990 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1996 al=SSL_AD_DECRYPT_ERROR;
1997 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2004 EVP_VerifyInit_ex(&md_ctx, md, NULL);
2005 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2006 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2007 EVP_VerifyUpdate(&md_ctx,param,param_len);
2008 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
2011 al=SSL_AD_DECRYPT_ERROR;
2012 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2019 /* aNULL, aSRP or kPSK do not need public keys */
2020 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
2022 /* Might be wrong key type, check it */
2023 if (ssl3_check_cert_and_algorithm(s))
2024 /* Otherwise this shouldn't happen */
2025 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2028 /* still data left over */
2031 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
2035 EVP_PKEY_free(pkey);
2036 EVP_MD_CTX_cleanup(&md_ctx);
2039 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2041 EVP_PKEY_free(pkey);
2042 #ifndef OPENSSL_NO_RSA
2046 #ifndef OPENSSL_NO_DH
2050 #ifndef OPENSSL_NO_ECDH
2051 BN_CTX_free(bn_ctx);
2052 EC_POINT_free(srvr_ecpoint);
2056 EVP_MD_CTX_cleanup(&md_ctx);
2060 int ssl3_get_certificate_request(SSL *s)
2063 unsigned long n,nc,l;
2064 unsigned int llen, ctype_num,i;
2066 const unsigned char *p,*q;
2068 STACK_OF(X509_NAME) *ca_sk=NULL;
2070 n=s->method->ssl_get_message(s,
2071 SSL3_ST_CR_CERT_REQ_A,
2072 SSL3_ST_CR_CERT_REQ_B,
2077 if (!ok) return((int)n);
2079 s->s3->tmp.cert_req=0;
2081 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2083 s->s3->tmp.reuse_message=1;
2084 /* If we get here we don't need any cached handshake records
2085 * as we wont be doing client auth.
2087 if (s->s3->handshake_buffer)
2089 if (!ssl3_digest_cached_records(s))
2095 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2097 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2098 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2102 /* TLS does not like anon-DH with client cert */
2103 if (s->version > SSL3_VERSION)
2105 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2107 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2108 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2113 p=d=(unsigned char *)s->init_msg;
2115 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2117 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2121 /* get the certificate types */
2123 if (s->cert->ctypes)
2125 OPENSSL_free(s->cert->ctypes);
2126 s->cert->ctypes = NULL;
2128 if (ctype_num > SSL3_CT_NUMBER)
2130 /* If we exceed static buffer copy all to cert structure */
2131 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2132 memcpy(s->cert->ctypes, p, ctype_num);
2133 s->cert->ctype_num = (size_t)ctype_num;
2134 ctype_num=SSL3_CT_NUMBER;
2136 for (i=0; i<ctype_num; i++)
2137 s->s3->tmp.ctype[i]= p[i];
2139 if (SSL_USE_SIGALGS(s))
2142 /* Check we have enough room for signature algorithms and
2143 * following length value.
2145 if ((unsigned long)(p - d + llen + 2) > n)
2147 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2148 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2151 /* Clear certificate digests and validity flags */
2152 for (i = 0; i < SSL_PKEY_NUM; i++)
2154 s->cert->pkeys[i].digest = NULL;
2155 s->cert->pkeys[i].valid_flags = 0;
2157 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen))
2159 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2160 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2163 if (!tls1_process_sigalgs(s))
2165 ssl3_send_alert(s,SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2166 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2172 /* get the CA RDNs */
2177 out=fopen("/tmp/vsign.der","w");
2178 fwrite(p,1,llen,out);
2183 if ((unsigned long)(p - d + llen) != n)
2185 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2186 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2190 for (nc=0; nc<llen; )
2193 if ((l+nc+2) > llen)
2195 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2196 goto cont; /* netscape bugs */
2197 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2198 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2204 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2206 /* If netscape tolerance is on, ignore errors */
2207 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2211 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2212 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2219 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2220 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2223 if (!sk_X509_NAME_push(ca_sk,xn))
2225 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2239 /* we should setup a certificate to return.... */
2240 s->s3->tmp.cert_req=1;
2241 s->s3->tmp.ctype_num=ctype_num;
2242 if (s->s3->tmp.ca_names != NULL)
2243 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2244 s->s3->tmp.ca_names=ca_sk;
2249 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2253 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2255 return(X509_NAME_cmp(*a,*b));
2257 #ifndef OPENSSL_NO_TLSEXT
2258 int ssl3_get_new_session_ticket(SSL *s)
2260 int ok,al,ret=0, ticklen;
2262 const unsigned char *p;
2265 n=s->method->ssl_get_message(s,
2266 SSL3_ST_CR_SESSION_TICKET_A,
2267 SSL3_ST_CR_SESSION_TICKET_B,
2268 SSL3_MT_NEWSESSION_TICKET,
2277 /* need at least ticket_lifetime_hint + ticket length */
2278 al = SSL_AD_DECODE_ERROR;
2279 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2283 p=d=(unsigned char *)s->init_msg;
2284 n2l(p, s->session->tlsext_tick_lifetime_hint);
2286 /* ticket_lifetime_hint + ticket_length + ticket */
2287 if (ticklen + 6 != n)
2289 al = SSL_AD_DECODE_ERROR;
2290 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2293 if (s->session->tlsext_tick)
2295 OPENSSL_free(s->session->tlsext_tick);
2296 s->session->tlsext_ticklen = 0;
2298 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2299 if (!s->session->tlsext_tick)
2301 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2304 memcpy(s->session->tlsext_tick, p, ticklen);
2305 s->session->tlsext_ticklen = ticklen;
2306 /* There are two ways to detect a resumed ticket session.
2307 * One is to set an appropriate session ID and then the server
2308 * must return a match in ServerHello. This allows the normal
2309 * client session ID matching to work and we know much
2310 * earlier that the ticket has been accepted.
2312 * The other way is to set zero length session ID when the
2313 * ticket is presented and rely on the handshake to determine
2314 * session resumption.
2316 * We choose the former approach because this fits in with
2317 * assumptions elsewhere in OpenSSL. The session ID is set
2318 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2321 EVP_Digest(p, ticklen,
2322 s->session->session_id, &s->session->session_id_length,
2323 #ifndef OPENSSL_NO_SHA256
2324 EVP_sha256(), NULL);
2331 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2336 int ssl3_get_cert_status(SSL *s)
2339 unsigned long resplen,n;
2340 const unsigned char *p;
2342 n=s->method->ssl_get_message(s,
2343 SSL3_ST_CR_CERT_STATUS_A,
2344 SSL3_ST_CR_CERT_STATUS_B,
2345 SSL3_MT_CERTIFICATE_STATUS,
2349 if (!ok) return((int)n);
2352 /* need at least status type + length */
2353 al = SSL_AD_DECODE_ERROR;
2354 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2357 p = (unsigned char *)s->init_msg;
2358 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2360 al = SSL_AD_DECODE_ERROR;
2361 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2365 if (resplen + 4 != n)
2367 al = SSL_AD_DECODE_ERROR;
2368 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2371 if (s->tlsext_ocsp_resp)
2372 OPENSSL_free(s->tlsext_ocsp_resp);
2373 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2374 if (!s->tlsext_ocsp_resp)
2376 al = SSL_AD_INTERNAL_ERROR;
2377 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2380 s->tlsext_ocsp_resplen = resplen;
2381 if (s->ctx->tlsext_status_cb)
2384 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2387 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2388 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2393 al = SSL_AD_INTERNAL_ERROR;
2394 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2400 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2405 int ssl3_get_server_done(SSL *s)
2410 n=s->method->ssl_get_message(s,
2411 SSL3_ST_CR_SRVR_DONE_A,
2412 SSL3_ST_CR_SRVR_DONE_B,
2413 SSL3_MT_SERVER_DONE,
2414 30, /* should be very small, like 0 :-) */
2417 if (!ok) return((int)n);
2420 /* should contain no data */
2421 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2422 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2430 int ssl3_send_client_key_exchange(SSL *s)
2434 unsigned long alg_k;
2435 #ifndef OPENSSL_NO_RSA
2437 EVP_PKEY *pkey=NULL;
2439 #ifndef OPENSSL_NO_KRB5
2441 #endif /* OPENSSL_NO_KRB5 */
2442 #ifndef OPENSSL_NO_ECDH
2443 EC_KEY *clnt_ecdh = NULL;
2444 const EC_POINT *srvr_ecpoint = NULL;
2445 EVP_PKEY *srvr_pub_pkey = NULL;
2446 unsigned char *encodedPoint = NULL;
2447 int encoded_pt_len = 0;
2448 BN_CTX * bn_ctx = NULL;
2451 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2453 p = ssl_handshake_start(s);
2455 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2457 /* Fool emacs indentation */
2459 #ifndef OPENSSL_NO_RSA
2460 else if (alg_k & SSL_kRSA)
2463 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2465 if (s->session->sess_cert == NULL)
2467 /* We should always have a server certificate with SSL_kRSA. */
2468 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2472 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2473 rsa=s->session->sess_cert->peer_rsa_tmp;
2476 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2477 if ((pkey == NULL) ||
2478 (pkey->type != EVP_PKEY_RSA) ||
2479 (pkey->pkey.rsa == NULL))
2481 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2485 EVP_PKEY_free(pkey);
2488 tmp_buf[0]=s->client_version>>8;
2489 tmp_buf[1]=s->client_version&0xff;
2490 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2493 s->session->master_key_length=sizeof tmp_buf;
2496 /* Fix buf for TLS and beyond */
2497 if (s->version > SSL3_VERSION)
2499 n=RSA_public_encrypt(sizeof tmp_buf,
2500 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2502 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2503 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2507 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2511 /* Fix buf for TLS and beyond */
2512 if (s->version > SSL3_VERSION)
2518 s->session->master_key_length=
2519 s->method->ssl3_enc->generate_master_secret(s,
2520 s->session->master_key,
2521 tmp_buf,sizeof tmp_buf);
2522 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2525 #ifndef OPENSSL_NO_KRB5
2526 else if (alg_k & SSL_kKRB5)
2528 krb5_error_code krb5rc;
2529 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2530 /* krb5_data krb5_ap_req; */
2531 krb5_data *enc_ticket;
2532 krb5_data authenticator, *authp = NULL;
2533 EVP_CIPHER_CTX ciph_ctx;
2534 const EVP_CIPHER *enc = NULL;
2535 unsigned char iv[EVP_MAX_IV_LENGTH];
2536 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2537 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2538 + EVP_MAX_IV_LENGTH];
2539 int padl, outl = sizeof(epms);
2541 EVP_CIPHER_CTX_init(&ciph_ctx);
2544 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2546 #endif /* KSSL_DEBUG */
2550 if (KRB5SENDAUTH) authp = &authenticator;
2551 #endif /* KRB5SENDAUTH */
2553 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2555 enc = kssl_map_enc(kssl_ctx->enctype);
2560 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2561 if (krb5rc && kssl_err.text)
2562 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2564 #endif /* KSSL_DEBUG */
2568 ssl3_send_alert(s,SSL3_AL_FATAL,
2569 SSL_AD_HANDSHAKE_FAILURE);
2570 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2575 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2576 ** in place of RFC 2712 KerberosWrapper, as in:
2578 ** Send ticket (copy to *p, set n = length)
2579 ** n = krb5_ap_req.length;
2580 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2581 ** if (krb5_ap_req.data)
2582 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2584 ** Now using real RFC 2712 KerberosWrapper
2585 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2586 ** Note: 2712 "opaque" types are here replaced
2587 ** with a 2-byte length followed by the value.
2589 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2590 ** Where "xx xx" = length bytes. Shown here with
2591 ** optional authenticator omitted.
2594 /* KerberosWrapper.Ticket */
2595 s2n(enc_ticket->length,p);
2596 memcpy(p, enc_ticket->data, enc_ticket->length);
2597 p+= enc_ticket->length;
2598 n = enc_ticket->length + 2;
2600 /* KerberosWrapper.Authenticator */
2601 if (authp && authp->length)
2603 s2n(authp->length,p);
2604 memcpy(p, authp->data, authp->length);
2606 n+= authp->length + 2;
2614 s2n(0,p);/* null authenticator length */
2618 tmp_buf[0]=s->client_version>>8;
2619 tmp_buf[1]=s->client_version&0xff;
2620 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2623 /* 20010420 VRS. Tried it this way; failed.
2624 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2625 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2626 ** kssl_ctx->length);
2627 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2630 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2631 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2633 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2635 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2637 if (outl > (int)sizeof epms)
2639 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2642 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2644 /* KerberosWrapper.EncryptedPreMasterSecret */
2646 memcpy(p, epms, outl);
2650 s->session->master_key_length=
2651 s->method->ssl3_enc->generate_master_secret(s,
2652 s->session->master_key,
2653 tmp_buf, sizeof tmp_buf);
2655 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2656 OPENSSL_cleanse(epms, outl);
2659 #ifndef OPENSSL_NO_DH
2660 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2662 DH *dh_srvr,*dh_clnt;
2663 SESS_CERT *scert = s->session->sess_cert;
2667 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2668 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2672 if (scert->peer_dh_tmp != NULL)
2673 dh_srvr=scert->peer_dh_tmp;
2676 /* we get them from the cert */
2677 int idx = scert->peer_cert_type;
2678 EVP_PKEY *spkey = NULL;
2681 spkey = X509_get_pubkey(
2682 scert->peer_pkeys[idx].x509);
2685 dh_srvr = EVP_PKEY_get1_DH(spkey);
2686 EVP_PKEY_free(spkey);
2688 if (dh_srvr == NULL)
2690 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2691 ERR_R_INTERNAL_ERROR);
2695 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2697 /* Use client certificate key */
2698 EVP_PKEY *clkey = s->cert->key->privatekey;
2701 dh_clnt = EVP_PKEY_get1_DH(clkey);
2702 if (dh_clnt == NULL)
2704 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2705 ERR_R_INTERNAL_ERROR);
2711 /* generate a new random key */
2712 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2714 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2717 if (!DH_generate_key(dh_clnt))
2719 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2725 /* use the 'p' output buffer for the DH key, but
2726 * make sure to clear it out afterwards */
2728 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2729 if (scert->peer_dh_tmp == NULL)
2734 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2739 /* generate master key from the result */
2740 s->session->master_key_length=
2741 s->method->ssl3_enc->generate_master_secret(s,
2742 s->session->master_key,p,n);
2746 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2750 /* send off the data */
2751 n=BN_num_bytes(dh_clnt->pub_key);
2753 BN_bn2bin(dh_clnt->pub_key,p);
2759 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2763 #ifndef OPENSSL_NO_ECDH
2764 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2766 const EC_GROUP *srvr_group = NULL;
2768 int ecdh_clnt_cert = 0;
2771 if (s->session->sess_cert == NULL)
2773 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2774 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2778 /* Did we send out the client's
2779 * ECDH share for use in premaster
2780 * computation as part of client certificate?
2781 * If so, set ecdh_clnt_cert to 1.
2783 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2785 /* XXX: For now, we do not support client
2786 * authentication using ECDH certificates.
2787 * To add such support, one needs to add
2788 * code that checks for appropriate
2789 * conditions and sets ecdh_clnt_cert to 1.
2790 * For example, the cert have an ECC
2791 * key on the same curve as the server's
2792 * and the key should be authorized for
2795 * One also needs to add code in ssl3_connect
2796 * to skip sending the certificate verify
2799 * if ((s->cert->key->privatekey != NULL) &&
2800 * (s->cert->key->privatekey->type ==
2801 * EVP_PKEY_EC) && ...)
2802 * ecdh_clnt_cert = 1;
2806 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2808 tkey = s->session->sess_cert->peer_ecdh_tmp;
2812 /* Get the Server Public Key from Cert */
2813 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2814 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2815 if ((srvr_pub_pkey == NULL) ||
2816 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2817 (srvr_pub_pkey->pkey.ec == NULL))
2819 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2820 ERR_R_INTERNAL_ERROR);
2824 tkey = srvr_pub_pkey->pkey.ec;
2827 srvr_group = EC_KEY_get0_group(tkey);
2828 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2830 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2832 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2833 ERR_R_INTERNAL_ERROR);
2837 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2839 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2843 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2845 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2850 /* Reuse key info from our certificate
2851 * We only need our private key to perform
2852 * the ECDH computation.
2854 const BIGNUM *priv_key;
2855 tkey = s->cert->key->privatekey->pkey.ec;
2856 priv_key = EC_KEY_get0_private_key(tkey);
2857 if (priv_key == NULL)
2859 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2862 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2864 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2870 /* Generate a new ECDH key pair */
2871 if (!(EC_KEY_generate_key(clnt_ecdh)))
2873 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2878 /* use the 'p' output buffer for the ECDH key, but
2879 * make sure to clear it out afterwards
2882 field_size = EC_GROUP_get_degree(srvr_group);
2883 if (field_size <= 0)
2885 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2889 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2892 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2897 /* generate master key from the result */
2898 s->session->master_key_length = s->method->ssl3_enc \
2899 -> generate_master_secret(s,
2900 s->session->master_key,
2903 memset(p, 0, n); /* clean up */
2907 /* Send empty client key exch message */
2912 /* First check the size of encoding and
2913 * allocate memory accordingly.
2916 EC_POINT_point2oct(srvr_group,
2917 EC_KEY_get0_public_key(clnt_ecdh),
2918 POINT_CONVERSION_UNCOMPRESSED,
2921 encodedPoint = (unsigned char *)
2922 OPENSSL_malloc(encoded_pt_len *
2923 sizeof(unsigned char));
2924 bn_ctx = BN_CTX_new();
2925 if ((encodedPoint == NULL) ||
2928 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2932 /* Encode the public key */
2933 n = EC_POINT_point2oct(srvr_group,
2934 EC_KEY_get0_public_key(clnt_ecdh),
2935 POINT_CONVERSION_UNCOMPRESSED,
2936 encodedPoint, encoded_pt_len, bn_ctx);
2938 *p = n; /* length of encoded point */
2939 /* Encoded point will be copied here */
2941 /* copy the point */
2942 memcpy((unsigned char *)p, encodedPoint, n);
2943 /* increment n to account for length field */
2947 /* Free allocated memory */
2948 BN_CTX_free(bn_ctx);
2949 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2950 if (clnt_ecdh != NULL)
2951 EC_KEY_free(clnt_ecdh);
2952 EVP_PKEY_free(srvr_pub_pkey);
2954 #endif /* !OPENSSL_NO_ECDH */
2955 else if (alg_k & SSL_kGOST)
2957 /* GOST key exchange message creation */
2958 EVP_PKEY_CTX *pkey_ctx;
2961 unsigned int md_len;
2963 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2964 EVP_MD_CTX *ukm_hash;
2967 /* Get server sertificate PKEY and create ctx from it */
2968 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2970 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2972 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2976 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2977 /* If we have send a certificate, and certificate key
2979 * parameters match those of server certificate, use
2980 * certificate key for key exchange
2983 /* Otherwise, generate ephemeral key pair */
2985 EVP_PKEY_encrypt_init(pkey_ctx);
2986 /* Generate session key */
2987 RAND_bytes(premaster_secret,32);
2988 /* If we have client certificate, use its secret as peer key */
2989 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2990 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2991 /* If there was an error - just ignore it. Ephemeral key
2997 /* Compute shared IV and store it in algorithm-specific
2999 ukm_hash = EVP_MD_CTX_create();
3000 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
3001 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
3002 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
3003 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
3004 EVP_MD_CTX_destroy(ukm_hash);
3005 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
3007 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3011 /* Make GOST keytransport blob message */
3012 /*Encapsulate it into sequence */
3013 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
3015 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
3016 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3023 *(p++)= msglen & 0xff;
3028 *(p++)= msglen & 0xff;
3031 memcpy(p, tmp, msglen);
3032 /* Check if pubkey from client certificate was used */
3033 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
3035 /* Set flag "skip certificate verify" */
3036 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3038 EVP_PKEY_CTX_free(pkey_ctx);
3039 s->session->master_key_length=
3040 s->method->ssl3_enc->generate_master_secret(s,
3041 s->session->master_key,premaster_secret,32);
3042 EVP_PKEY_free(pub_key);
3045 #ifndef OPENSSL_NO_SRP
3046 else if (alg_k & SSL_kSRP)
3048 if (s->srp_ctx.A != NULL)
3050 /* send off the data */
3051 n=BN_num_bytes(s->srp_ctx.A);
3053 BN_bn2bin(s->srp_ctx.A,p);
3058 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3061 if (s->session->srp_username != NULL)
3062 OPENSSL_free(s->session->srp_username);
3063 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3064 if (s->session->srp_username == NULL)
3066 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3067 ERR_R_MALLOC_FAILURE);
3071 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3073 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3078 #ifndef OPENSSL_NO_PSK
3079 else if (alg_k & SSL_kPSK)
3081 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes
3082 * to return a \0-terminated identity. The last byte
3083 * is for us for simulating strnlen. */
3084 char identity[PSK_MAX_IDENTITY_LEN + 2];
3085 size_t identity_len;
3086 unsigned char *t = NULL;
3087 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3088 unsigned int pre_ms_len = 0, psk_len = 0;
3092 if (s->psk_client_callback == NULL)
3094 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3095 SSL_R_PSK_NO_CLIENT_CB);
3099 memset(identity, 0, sizeof(identity));
3100 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3101 identity, sizeof(identity) - 1,
3102 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3103 if (psk_len > PSK_MAX_PSK_LEN)
3105 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3106 ERR_R_INTERNAL_ERROR);
3109 else if (psk_len == 0)
3111 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3112 SSL_R_PSK_IDENTITY_NOT_FOUND);
3115 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
3116 identity_len = strlen(identity);
3117 if (identity_len > PSK_MAX_IDENTITY_LEN)
3119 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3120 ERR_R_INTERNAL_ERROR);
3123 /* create PSK pre_master_secret */
3124 pre_ms_len = 2+psk_len+2+psk_len;
3126 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3128 memset(t, 0, psk_len);
3132 if (s->session->psk_identity_hint != NULL)
3133 OPENSSL_free(s->session->psk_identity_hint);
3134 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3135 if (s->ctx->psk_identity_hint != NULL &&
3136 s->session->psk_identity_hint == NULL)
3138 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3139 ERR_R_MALLOC_FAILURE);
3143 if (s->session->psk_identity != NULL)
3144 OPENSSL_free(s->session->psk_identity);
3145 s->session->psk_identity = BUF_strdup(identity);
3146 if (s->session->psk_identity == NULL)
3148 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3149 ERR_R_MALLOC_FAILURE);
3153 s->session->master_key_length =
3154 s->method->ssl3_enc->generate_master_secret(s,
3155 s->session->master_key,
3156 psk_or_pre_ms, pre_ms_len);
3157 s2n(identity_len, p);
3158 memcpy(p, identity, identity_len);
3159 n = 2 + identity_len;
3162 OPENSSL_cleanse(identity, sizeof(identity));
3163 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3166 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3173 ssl3_send_alert(s, SSL3_AL_FATAL,
3174 SSL_AD_HANDSHAKE_FAILURE);
3175 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3176 ERR_R_INTERNAL_ERROR);
3180 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3181 s->state=SSL3_ST_CW_KEY_EXCH_B;
3184 /* SSL3_ST_CW_KEY_EXCH_B */
3185 return ssl_do_write(s);
3187 #ifndef OPENSSL_NO_ECDH
3188 BN_CTX_free(bn_ctx);
3189 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3190 if (clnt_ecdh != NULL)
3191 EC_KEY_free(clnt_ecdh);
3192 EVP_PKEY_free(srvr_pub_pkey);
3197 int ssl3_send_client_verify(SSL *s)
3200 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3202 EVP_PKEY_CTX *pctx=NULL;
3208 EVP_MD_CTX_init(&mctx);
3210 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3212 p= ssl_handshake_start(s);
3213 pkey=s->cert->key->privatekey;
3214 /* Create context from key and test if sha1 is allowed as digest */
3215 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3216 EVP_PKEY_sign_init(pctx);
3217 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3219 if (!SSL_USE_SIGALGS(s))
3220 s->method->ssl3_enc->cert_verify_mac(s,
3222 &(data[MD5_DIGEST_LENGTH]));
3228 /* For TLS v1.2 send signature algorithm and signature
3229 * using agreed digest and cached handshake records.
3231 if (SSL_USE_SIGALGS(s))
3235 const EVP_MD *md = s->cert->key->digest;
3236 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3238 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3240 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3241 ERR_R_INTERNAL_ERROR);
3246 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3249 if (!EVP_SignInit_ex(&mctx, md, NULL)
3250 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3251 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3253 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3259 if (!ssl3_digest_cached_records(s))
3263 #ifndef OPENSSL_NO_RSA
3264 if (pkey->type == EVP_PKEY_RSA)
3266 s->method->ssl3_enc->cert_verify_mac(s,
3269 if (RSA_sign(NID_md5_sha1, data,
3270 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3271 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3273 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3281 #ifndef OPENSSL_NO_DSA
3282 if (pkey->type == EVP_PKEY_DSA)
3284 if (!DSA_sign(pkey->save_type,
3285 &(data[MD5_DIGEST_LENGTH]),
3286 SHA_DIGEST_LENGTH,&(p[2]),
3287 (unsigned int *)&j,pkey->pkey.dsa))
3289 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3297 #ifndef OPENSSL_NO_ECDSA
3298 if (pkey->type == EVP_PKEY_EC)
3300 if (!ECDSA_sign(pkey->save_type,
3301 &(data[MD5_DIGEST_LENGTH]),
3302 SHA_DIGEST_LENGTH,&(p[2]),
3303 (unsigned int *)&j,pkey->pkey.ec))
3305 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3314 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3316 unsigned char signbuf[64];
3319 s->method->ssl3_enc->cert_verify_mac(s,
3320 NID_id_GostR3411_94,
3322 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3323 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3324 ERR_R_INTERNAL_ERROR);
3327 for (i=63,j=0; i>=0; j++, i--) {
3335 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3338 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3339 s->state=SSL3_ST_CW_CERT_VRFY_B;
3341 EVP_MD_CTX_cleanup(&mctx);
3342 EVP_PKEY_CTX_free(pctx);
3343 return ssl_do_write(s);
3345 EVP_MD_CTX_cleanup(&mctx);
3346 EVP_PKEY_CTX_free(pctx);
3350 /* Check a certificate can be used for client authentication. Currently
3351 * check cert exists, if we have a suitable digest for TLS 1.2 if
3352 * static DH client certificates can be used and optionally checks
3353 * suitability for Suite B.
3355 static int ssl3_check_client_certificate(SSL *s)
3357 unsigned long alg_k;
3358 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3360 /* If no suitable signature algorithm can't use certificate */
3361 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3363 /* If strict mode check suitability of chain before using it.
3364 * This also adjusts suite B digest if necessary.
3366 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3367 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3369 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3370 /* See if we can use client certificate for fixed DH */
3371 if (alg_k & (SSL_kDHr|SSL_kDHd))
3373 SESS_CERT *scert = s->session->sess_cert;
3374 int i = scert->peer_cert_type;
3375 EVP_PKEY *clkey = NULL, *spkey = NULL;
3376 clkey = s->cert->key->privatekey;
3377 /* If client key not DH assume it can be used */
3378 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3381 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3384 /* Compare server and client parameters */
3385 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3386 EVP_PKEY_free(spkey);
3390 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3395 int ssl3_send_client_certificate(SSL *s)
3398 EVP_PKEY *pkey=NULL;
3401 if (s->state == SSL3_ST_CW_CERT_A)
3403 /* Let cert callback update client certificates if required */
3404 if (s->cert->cert_cb)
3406 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3409 s->rwstate=SSL_X509_LOOKUP;
3414 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3417 s->rwstate=SSL_NOTHING;
3419 if (ssl3_check_client_certificate(s))
3420 s->state=SSL3_ST_CW_CERT_C;
3422 s->state=SSL3_ST_CW_CERT_B;
3425 /* We need to get a client cert */
3426 if (s->state == SSL3_ST_CW_CERT_B)
3428 /* If we get an error, we need to
3429 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3430 * We then get retied later */
3432 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3435 s->rwstate=SSL_X509_LOOKUP;
3438 s->rwstate=SSL_NOTHING;
3439 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3441 s->state=SSL3_ST_CW_CERT_B;
3442 if ( !SSL_use_certificate(s,x509) ||
3443 !SSL_use_PrivateKey(s,pkey))
3449 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3452 if (x509 != NULL) X509_free(x509);
3453 if (pkey != NULL) EVP_PKEY_free(pkey);
3454 if (i && !ssl3_check_client_certificate(s))
3458 if (s->version == SSL3_VERSION)
3460 s->s3->tmp.cert_req=0;
3461 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3466 s->s3->tmp.cert_req=2;
3470 /* Ok, we have a cert */
3471 s->state=SSL3_ST_CW_CERT_C;
3474 if (s->state == SSL3_ST_CW_CERT_C)
3476 s->state=SSL3_ST_CW_CERT_D;
3477 ssl3_output_cert_chain(s,
3478 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3480 /* SSL3_ST_CW_CERT_D */
3481 return ssl_do_write(s);
3484 #define has_bits(i,m) (((i)&(m)) == (m))
3486 int ssl3_check_cert_and_algorithm(SSL *s)
3490 EVP_PKEY *pkey=NULL;
3492 #ifndef OPENSSL_NO_RSA
3495 #ifndef OPENSSL_NO_DH
3499 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3500 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3502 /* we don't have a certificate */
3503 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3506 sc=s->session->sess_cert;
3509 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3513 #ifndef OPENSSL_NO_RSA
3514 rsa=s->session->sess_cert->peer_rsa_tmp;
3516 #ifndef OPENSSL_NO_DH
3517 dh=s->session->sess_cert->peer_dh_tmp;
3520 /* This is the passed certificate */
3522 idx=sc->peer_cert_type;
3523 #ifndef OPENSSL_NO_ECDH
3524 if (idx == SSL_PKEY_ECC)
3526 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3528 { /* check failed */
3529 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3537 else if (alg_a & SSL_aECDSA)
3539 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3542 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3544 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3548 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3549 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3550 EVP_PKEY_free(pkey);
3553 /* Check that we have a certificate if we require one */
3554 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3556 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3559 #ifndef OPENSSL_NO_DSA
3560 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3562 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3566 #ifndef OPENSSL_NO_RSA
3567 if ((alg_k & SSL_kRSA) &&
3568 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3570 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3574 #ifndef OPENSSL_NO_DH
3575 if ((alg_k & SSL_kEDH) &&
3576 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3578 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3581 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3582 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3584 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3587 #ifndef OPENSSL_NO_DSA
3588 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3589 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3591 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3597 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3599 #ifndef OPENSSL_NO_RSA
3600 if (alg_k & SSL_kRSA)
3603 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3605 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3611 #ifndef OPENSSL_NO_DH
3612 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3615 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3617 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3624 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3630 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3635 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3636 int ssl3_send_next_proto(SSL *s)
3638 unsigned int len, padding_len;
3641 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3643 len = s->next_proto_negotiated_len;
3644 padding_len = 32 - ((len + 2) % 32);
3645 d = (unsigned char *)s->init_buf->data;
3647 memcpy(d + 5, s->next_proto_negotiated, len);
3648 d[5 + len] = padding_len;
3649 memset(d + 6 + len, 0, padding_len);
3650 *(d++)=SSL3_MT_NEXT_PROTO;
3651 l2n3(2 + len + padding_len, d);
3652 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3653 s->init_num = 4 + 2 + len + padding_len;
3657 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3659 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3661 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3664 #ifndef OPENSSL_NO_ENGINE
3665 if (s->ctx->client_cert_engine)
3667 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3668 SSL_get_client_CA_list(s),
3669 px509, ppkey, NULL, NULL, NULL);
3674 if (s->ctx->client_cert_cb)
3675 i = s->ctx->client_cert_cb(s,px509,ppkey);