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 if (!ssl_security(s, SSL_SECOP_VERSION, 0,
248 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW);
252 /* s->version=SSL3_VERSION; */
253 s->type=SSL_ST_CONNECT;
255 if (s->init_buf == NULL)
257 if ((buf=BUF_MEM_new()) == NULL)
262 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
271 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
273 /* setup buffing BIO */
274 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
276 /* don't push the buffering BIO quite yet */
278 ssl3_init_finished_mac(s);
280 s->state=SSL3_ST_CW_CLNT_HELLO_A;
281 s->ctx->stats.sess_connect++;
283 s->s3->flags &= ~SSL3_FLAGS_CCS_OK;
284 /* Should have been reset by ssl3_get_finished, too. */
285 s->s3->change_cipher_spec = 0;
288 case SSL3_ST_CW_CLNT_HELLO_A:
289 case SSL3_ST_CW_CLNT_HELLO_B:
292 ret=ssl3_client_hello(s);
293 if (ret <= 0) goto end;
294 s->state=SSL3_ST_CR_SRVR_HELLO_A;
297 /* turn on buffering for the next lot of output */
298 if (s->bbio != s->wbio)
299 s->wbio=BIO_push(s->bbio,s->wbio);
303 case SSL3_ST_CR_SRVR_HELLO_A:
304 case SSL3_ST_CR_SRVR_HELLO_B:
305 ret=ssl3_get_server_hello(s);
306 if (ret <= 0) goto end;
310 s->state=SSL3_ST_CR_FINISHED_A;
311 #ifndef OPENSSL_NO_TLSEXT
312 if (s->tlsext_ticket_expected)
314 /* receive renewed session ticket */
315 s->state=SSL3_ST_CR_SESSION_TICKET_A;
321 s->state=SSL3_ST_CR_CERT_A;
325 case SSL3_ST_CR_CERT_A:
326 case SSL3_ST_CR_CERT_B:
327 /* Check if it is anon DH/ECDH, SRP auth */
329 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) &&
330 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
332 ret=ssl3_get_server_certificate(s);
333 if (ret <= 0) goto end;
334 #ifndef OPENSSL_NO_TLSEXT
335 if (s->tlsext_status_expected)
336 s->state=SSL3_ST_CR_CERT_STATUS_A;
338 s->state=SSL3_ST_CR_KEY_EXCH_A;
343 s->state=SSL3_ST_CR_KEY_EXCH_A;
350 s->state=SSL3_ST_CR_KEY_EXCH_A;
355 case SSL3_ST_CR_KEY_EXCH_A:
356 case SSL3_ST_CR_KEY_EXCH_B:
357 ret=ssl3_get_key_exchange(s);
358 if (ret <= 0) goto end;
359 s->state=SSL3_ST_CR_CERT_REQ_A;
362 /* at this point we check that we have the
363 * required stuff from the server */
364 if (!ssl3_check_cert_and_algorithm(s))
371 case SSL3_ST_CR_CERT_REQ_A:
372 case SSL3_ST_CR_CERT_REQ_B:
373 ret=ssl3_get_certificate_request(s);
374 if (ret <= 0) goto end;
375 s->state=SSL3_ST_CR_SRVR_DONE_A;
379 case SSL3_ST_CR_SRVR_DONE_A:
380 case SSL3_ST_CR_SRVR_DONE_B:
381 ret=ssl3_get_server_done(s);
382 if (ret <= 0) goto end;
383 #ifndef OPENSSL_NO_SRP
384 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
386 if ((ret = SRP_Calc_A_param(s))<=0)
388 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
389 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
394 if (s->s3->tmp.cert_req)
395 s->state=SSL3_ST_CW_CERT_A;
397 s->state=SSL3_ST_CW_KEY_EXCH_A;
402 case SSL3_ST_CW_CERT_A:
403 case SSL3_ST_CW_CERT_B:
404 case SSL3_ST_CW_CERT_C:
405 case SSL3_ST_CW_CERT_D:
406 ret=ssl3_send_client_certificate(s);
407 if (ret <= 0) goto end;
408 s->state=SSL3_ST_CW_KEY_EXCH_A;
412 case SSL3_ST_CW_KEY_EXCH_A:
413 case SSL3_ST_CW_KEY_EXCH_B:
414 ret=ssl3_send_client_key_exchange(s);
415 if (ret <= 0) goto end;
416 /* EAY EAY EAY need to check for DH fix cert
418 /* For TLS, cert_req is set to 2, so a cert chain
419 * of nothing is sent, but no verify packet is sent */
420 /* XXX: For now, we do not support client
421 * authentication in ECDH cipher suites with
422 * ECDH (rather than ECDSA) certificates.
423 * We need to skip the certificate verify
424 * message when client's ECDH public key is sent
425 * inside the client certificate.
427 if (s->s3->tmp.cert_req == 1)
429 s->state=SSL3_ST_CW_CERT_VRFY_A;
433 s->state=SSL3_ST_CW_CHANGE_A;
435 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
437 s->state=SSL3_ST_CW_CHANGE_A;
443 case SSL3_ST_CW_CERT_VRFY_A:
444 case SSL3_ST_CW_CERT_VRFY_B:
445 ret=ssl3_send_client_verify(s);
446 if (ret <= 0) goto end;
447 s->state=SSL3_ST_CW_CHANGE_A;
451 case SSL3_ST_CW_CHANGE_A:
452 case SSL3_ST_CW_CHANGE_B:
453 ret=ssl3_send_change_cipher_spec(s,
454 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
455 if (ret <= 0) goto end;
457 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
458 s->state=SSL3_ST_CW_FINISHED_A;
460 if (s->s3->next_proto_neg_seen)
461 s->state=SSL3_ST_CW_NEXT_PROTO_A;
463 s->state=SSL3_ST_CW_FINISHED_A;
467 s->session->cipher=s->s3->tmp.new_cipher;
468 #ifdef OPENSSL_NO_COMP
469 s->session->compress_meth=0;
471 if (s->s3->tmp.new_compression == NULL)
472 s->session->compress_meth=0;
474 s->session->compress_meth=
475 s->s3->tmp.new_compression->id;
477 if (!s->method->ssl3_enc->setup_key_block(s))
483 if (!s->method->ssl3_enc->change_cipher_state(s,
484 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
492 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
493 case SSL3_ST_CW_NEXT_PROTO_A:
494 case SSL3_ST_CW_NEXT_PROTO_B:
495 ret=ssl3_send_next_proto(s);
496 if (ret <= 0) goto end;
497 s->state=SSL3_ST_CW_FINISHED_A;
501 case SSL3_ST_CW_FINISHED_A:
502 case SSL3_ST_CW_FINISHED_B:
503 ret=ssl3_send_finished(s,
504 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
505 s->method->ssl3_enc->client_finished_label,
506 s->method->ssl3_enc->client_finished_label_len);
507 if (ret <= 0) goto end;
508 s->state=SSL3_ST_CW_FLUSH;
511 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
514 s->s3->tmp.next_state=SSL_ST_OK;
515 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
518 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
519 s->s3->delay_buf_pop_ret=0;
524 #ifndef OPENSSL_NO_TLSEXT
525 /* Allow NewSessionTicket if ticket expected */
526 if (s->tlsext_ticket_expected)
527 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
531 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
536 #ifndef OPENSSL_NO_TLSEXT
537 case SSL3_ST_CR_SESSION_TICKET_A:
538 case SSL3_ST_CR_SESSION_TICKET_B:
539 ret=ssl3_get_new_session_ticket(s);
540 if (ret <= 0) goto end;
541 s->state=SSL3_ST_CR_FINISHED_A;
545 case SSL3_ST_CR_CERT_STATUS_A:
546 case SSL3_ST_CR_CERT_STATUS_B:
547 ret=ssl3_get_cert_status(s);
548 if (ret <= 0) goto end;
549 s->state=SSL3_ST_CR_KEY_EXCH_A;
554 case SSL3_ST_CR_FINISHED_A:
555 case SSL3_ST_CR_FINISHED_B:
556 s->s3->flags |= SSL3_FLAGS_CCS_OK;
557 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
558 SSL3_ST_CR_FINISHED_B);
559 if (ret <= 0) goto end;
562 s->state=SSL3_ST_CW_CHANGE_A;
568 case SSL3_ST_CW_FLUSH:
569 s->rwstate=SSL_WRITING;
570 if (BIO_flush(s->wbio) <= 0)
575 s->rwstate=SSL_NOTHING;
576 s->state=s->s3->tmp.next_state;
580 /* clean a few things up */
581 ssl3_cleanup_key_block(s);
583 if (s->init_buf != NULL)
585 BUF_MEM_free(s->init_buf);
589 /* If we are not 'joining' the last two packets,
590 * remove the buffering now */
591 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
592 ssl_free_wbio_buffer(s);
593 /* else do it later in ssl3_write */
599 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
600 if (s->hit) s->ctx->stats.sess_hit++;
604 s->handshake_func=ssl3_connect;
605 s->ctx->stats.sess_connect_good++;
607 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
613 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
619 /* did we do anything */
620 if (!s->s3->tmp.reuse_message && !skip)
624 if ((ret=BIO_flush(s->wbio)) <= 0)
628 if ((cb != NULL) && (s->state != state))
632 cb(s,SSL_CB_CONNECT_LOOP,1);
643 cb(s,SSL_CB_CONNECT_EXIT,ret);
648 int ssl3_client_hello(SSL *s)
655 #ifndef OPENSSL_NO_COMP
660 buf=(unsigned char *)s->init_buf->data;
661 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
663 SSL_SESSION *sess = s->session;
664 if ((sess == NULL) ||
665 (sess->ssl_version != s->version) ||
666 !sess->session_id_length ||
667 (sess->not_resumable))
669 if (!ssl_get_new_session(s,0))
672 if (s->method->version == DTLS_ANY_VERSION)
674 /* Determine which DTLS version to use */
675 int options = s->options;
676 /* If DTLS 1.2 disabled correct the version number */
677 if (options & SSL_OP_NO_DTLSv1_2)
681 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
684 /* Disabling all versions is silly: return an
687 if (options & SSL_OP_NO_DTLSv1)
689 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
692 /* Update method so we don't use any DTLS 1.2
695 s->method = DTLSv1_client_method();
696 s->version = DTLS1_VERSION;
700 /* We only support one version: update method */
701 if (options & SSL_OP_NO_DTLSv1)
702 s->method = DTLSv1_2_client_method();
703 s->version = DTLS1_2_VERSION;
705 s->client_version = s->version;
707 /* else use the pre-loaded session */
709 p=s->s3->client_random;
711 /* for DTLS if client_random is initialized, reuse it, we are
712 * required to use same upon reply to HelloVerify */
717 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
730 ssl_fill_hello_random(s, 0, p,
731 sizeof(s->s3->client_random));
733 /* Do the message type and length last */
734 d=p= ssl_handshake_start(s);
736 /* version indicates the negotiated version: for example from
737 * an SSLv2/v3 compatible client hello). The client_version
738 * field is the maximum version we permit and it is also
739 * used in RSA encrypted premaster secrets. Some servers can
740 * choke if we initially report a higher version then
741 * renegotiate to a lower one in the premaster secret. This
742 * didn't happen with TLS 1.0 as most servers supported it
743 * but it can with TLS 1.1 or later if the server only supports
746 * Possible scenario with previous logic:
747 * 1. Client hello indicates TLS 1.2
748 * 2. Server hello says TLS 1.0
749 * 3. RSA encrypted premaster secret uses 1.2.
750 * 4. Handhaked proceeds using TLS 1.0.
751 * 5. Server sends hello request to renegotiate.
752 * 6. Client hello indicates TLS v1.0 as we now
753 * know that is maximum server supports.
754 * 7. Server chokes on RSA encrypted premaster secret
755 * containing version 1.0.
757 * For interoperability it should be OK to always use the
758 * maximum version we support in client hello and then rely
759 * on the checking of version to ensure the servers isn't
760 * being inconsistent: for example initially negotiating with
761 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
762 * client_version in client hello and not resetting it to
763 * the negotiated version.
766 *(p++)=s->version>>8;
767 *(p++)=s->version&0xff;
768 s->client_version=s->version;
770 *(p++)=s->client_version>>8;
771 *(p++)=s->client_version&0xff;
775 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
782 i=s->session->session_id_length;
786 if (i > (int)sizeof(s->session->session_id))
788 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
791 memcpy(p,s->session->session_id,i);
795 /* cookie stuff for DTLS */
798 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
800 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
803 *(p++) = s->d1->cookie_len;
804 memcpy(p, s->d1->cookie, s->d1->cookie_len);
805 p += s->d1->cookie_len;
808 /* Ciphers supported */
809 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
812 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
815 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
816 /* Some servers hang if client hello > 256 bytes
817 * as hack workaround chop number of supported ciphers
818 * to keep it well below this if we use TLS v1.2
820 if (TLS1_get_version(s) >= TLS1_2_VERSION
821 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
822 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
828 #ifdef OPENSSL_NO_COMP
832 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
835 j=sk_SSL_COMP_num(s->ctx->comp_methods);
839 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
843 *(p++)=0; /* Add the NULL method */
845 #ifndef OPENSSL_NO_TLSEXT
847 if (ssl_prepare_clienthello_tlsext(s) <= 0)
849 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
852 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
854 ssl3_send_alert(s,SSL3_AL_FATAL,al);
855 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
861 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
862 s->state=SSL3_ST_CW_CLNT_HELLO_B;
865 /* SSL3_ST_CW_CLNT_HELLO_B */
866 return ssl_do_write(s);
871 int ssl3_get_server_hello(SSL *s)
873 STACK_OF(SSL_CIPHER) *sk;
877 int i,al=SSL_AD_INTERNAL_ERROR,ok;
880 #ifndef OPENSSL_NO_COMP
883 /* Hello verify request and/or server hello version may not
884 * match so set first packet if we're negotiating version.
889 n=s->method->ssl_get_message(s,
890 SSL3_ST_CR_SRVR_HELLO_A,
891 SSL3_ST_CR_SRVR_HELLO_B,
896 if (!ok) return((int)n);
901 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
903 if ( s->d1->send_cookie == 0)
905 s->s3->tmp.reuse_message = 1;
908 else /* already sent a cookie */
910 al=SSL_AD_UNEXPECTED_MESSAGE;
911 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
917 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
919 al=SSL_AD_UNEXPECTED_MESSAGE;
920 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
924 d=p=(unsigned char *)s->init_msg;
925 if (s->method->version == DTLS_ANY_VERSION)
927 /* Work out correct protocol version to use */
928 int hversion = (p[0] << 8)|p[1];
929 int options = s->options;
930 if (hversion == DTLS1_2_VERSION
931 && !(options & SSL_OP_NO_DTLSv1_2))
932 s->method = DTLSv1_2_client_method();
933 else if (tls1_suiteb(s))
935 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
936 s->version = hversion;
937 al = SSL_AD_PROTOCOL_VERSION;
940 else if (hversion == DTLS1_VERSION
941 && !(options & SSL_OP_NO_DTLSv1))
942 s->method = DTLSv1_client_method();
945 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
946 s->version = hversion;
947 al = SSL_AD_PROTOCOL_VERSION;
950 s->version = s->client_version = s->method->version;
953 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
955 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
956 s->version=(s->version&0xff00)|p[1];
957 al=SSL_AD_PROTOCOL_VERSION;
962 /* load the server hello data */
963 /* load the server random */
964 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
969 /* get the session-id */
972 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
974 al=SSL_AD_ILLEGAL_PARAMETER;
975 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
979 #ifndef OPENSSL_NO_TLSEXT
980 /* check if we want to resume the session based on external pre-shared secret */
981 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
983 SSL_CIPHER *pref_cipher=NULL;
984 s->session->master_key_length=sizeof(s->session->master_key);
985 if (s->tls_session_secret_cb(s, s->session->master_key,
986 &s->session->master_key_length,
988 s->tls_session_secret_cb_arg))
990 s->session->cipher = pref_cipher ?
991 pref_cipher : ssl_get_cipher_by_char(s, p+j);
995 #endif /* OPENSSL_NO_TLSEXT */
997 if (!s->hit && j != 0 && j == s->session->session_id_length
998 && memcmp(p,s->session->session_id,j) == 0)
1000 if(s->sid_ctx_length != s->session->sid_ctx_length
1001 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1003 /* actually a client application bug */
1004 al=SSL_AD_ILLEGAL_PARAMETER;
1005 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1010 /* a miss or crap from the other end */
1013 /* If we were trying for session-id reuse, make a new
1014 * SSL_SESSION so we don't stuff up other people */
1015 if (s->session->session_id_length > 0)
1017 if (!ssl_get_new_session(s,0))
1022 s->session->session_id_length=j;
1023 memcpy(s->session->session_id,p,j); /* j could be 0 */
1026 c=ssl_get_cipher_by_char(s,p);
1029 /* unknown cipher */
1030 al=SSL_AD_ILLEGAL_PARAMETER;
1031 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1034 /* Set version disabled mask now we know version */
1035 if (!SSL_USE_TLS1_2_CIPHERS(s))
1036 ct->mask_ssl = SSL_TLSV1_2;
1039 /* If it is a disabled cipher we didn't send it in client hello,
1040 * so return an error.
1042 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK))
1044 al=SSL_AD_ILLEGAL_PARAMETER;
1045 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1048 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1050 sk=ssl_get_ciphers_by_id(s);
1051 i=sk_SSL_CIPHER_find(sk,c);
1054 /* we did not say we would use this cipher */
1055 al=SSL_AD_ILLEGAL_PARAMETER;
1056 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1060 /* Depending on the session caching (internal/external), the cipher
1061 and/or cipher_id values may not be set. Make sure that
1062 cipher_id is set and use it for comparison. */
1063 if (s->session->cipher)
1064 s->session->cipher_id = s->session->cipher->id;
1065 if (s->hit && (s->session->cipher_id != c->id))
1067 /* Workaround is now obsolete */
1070 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1073 al=SSL_AD_ILLEGAL_PARAMETER;
1074 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1078 s->s3->tmp.new_cipher=c;
1079 /* Don't digest cached records if no sigalgs: we may need them for
1080 * client authentication.
1082 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1084 /* lets get the compression algorithm */
1086 #ifdef OPENSSL_NO_COMP
1089 al=SSL_AD_ILLEGAL_PARAMETER;
1090 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1093 /* If compression is disabled we'd better not try to resume a session
1094 * using compression.
1096 if (s->session->compress_meth != 0)
1098 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1103 if (s->hit && j != s->session->compress_meth)
1105 al=SSL_AD_ILLEGAL_PARAMETER;
1106 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1111 else if (!ssl_allow_compression(s))
1113 al=SSL_AD_ILLEGAL_PARAMETER;
1114 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1118 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1120 if ((j != 0) && (comp == NULL))
1122 al=SSL_AD_ILLEGAL_PARAMETER;
1123 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1128 s->s3->tmp.new_compression=comp;
1132 #ifndef OPENSSL_NO_TLSEXT
1134 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1136 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1143 /* wrong packet length */
1144 al=SSL_AD_DECODE_ERROR;
1145 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1151 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1156 int ssl3_get_server_certificate(SSL *s)
1158 int al,i,ok,ret= -1;
1159 unsigned long n,nc,llen,l;
1161 const unsigned char *q,*p;
1163 STACK_OF(X509) *sk=NULL;
1165 EVP_PKEY *pkey=NULL;
1166 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1168 n=s->method->ssl_get_message(s,
1175 if (!ok) return((int)n);
1177 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1178 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1179 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1181 s->s3->tmp.reuse_message=1;
1185 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1187 al=SSL_AD_UNEXPECTED_MESSAGE;
1188 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1191 p=d=(unsigned char *)s->init_msg;
1193 if ((sk=sk_X509_new_null()) == NULL)
1195 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1202 al=SSL_AD_DECODE_ERROR;
1203 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1206 for (nc=0; nc<llen; )
1209 if ((l+nc+3) > llen)
1211 al=SSL_AD_DECODE_ERROR;
1212 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1217 x=d2i_X509(NULL,&q,l);
1220 al=SSL_AD_BAD_CERTIFICATE;
1221 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1226 al=SSL_AD_DECODE_ERROR;
1227 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1230 if (!sk_X509_push(sk,x))
1232 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1240 i=ssl_verify_cert_chain(s,sk);
1241 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1242 #ifndef OPENSSL_NO_KRB5
1243 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1244 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1245 #endif /* OPENSSL_NO_KRB5 */
1248 al=ssl_verify_alarm_type(s->verify_result);
1249 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1252 ERR_clear_error(); /* but we keep s->verify_result */
1255 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1256 al = SSL_AD_HANDSHAKE_FAILURE;
1260 sc=ssl_sess_cert_new();
1261 if (sc == NULL) goto err;
1263 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1264 s->session->sess_cert=sc;
1267 /* Inconsistency alert: cert_chain does include the peer's
1268 * certificate, which we don't include in s3_srvr.c */
1269 x=sk_X509_value(sk,0);
1271 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1273 pkey=X509_get_pubkey(x);
1275 /* VRS: allow null cert if auth == KRB5 */
1276 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1277 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1281 printf("pkey,x = %p, %p\n", pkey,x);
1282 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1283 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1284 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1285 #endif /* KSSL_DEBUG */
1287 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1291 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1292 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1296 i=ssl_cert_type(x,pkey);
1297 if (need_cert && i < 0)
1301 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1302 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1308 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1309 if (exp_idx >= 0 && i != exp_idx)
1312 al=SSL_AD_ILLEGAL_PARAMETER;
1313 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1314 SSL_R_WRONG_CERTIFICATE_TYPE);
1317 sc->peer_cert_type=i;
1318 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1319 /* Why would the following ever happen?
1320 * We just created sc a couple of lines ago. */
1321 if (sc->peer_pkeys[i].x509 != NULL)
1322 X509_free(sc->peer_pkeys[i].x509);
1323 sc->peer_pkeys[i].x509=x;
1324 sc->peer_key= &(sc->peer_pkeys[i]);
1326 if (s->session->peer != NULL)
1327 X509_free(s->session->peer);
1328 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1333 sc->peer_cert_type=i;
1336 if (s->session->peer != NULL)
1337 X509_free(s->session->peer);
1338 s->session->peer=NULL;
1340 s->session->verify_result = s->verify_result;
1347 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1350 EVP_PKEY_free(pkey);
1352 sk_X509_pop_free(sk,X509_free);
1356 int ssl3_get_key_exchange(SSL *s)
1358 #ifndef OPENSSL_NO_RSA
1359 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1362 unsigned char *param,*p;
1364 long i,param_len,n,alg_k,alg_a;
1365 EVP_PKEY *pkey=NULL;
1366 const EVP_MD *md = NULL;
1367 #ifndef OPENSSL_NO_RSA
1370 #ifndef OPENSSL_NO_DH
1373 #ifndef OPENSSL_NO_ECDH
1374 EC_KEY *ecdh = NULL;
1375 BN_CTX *bn_ctx = NULL;
1376 EC_POINT *srvr_ecpoint = NULL;
1378 int encoded_pt_len = 0;
1381 /* use same message size as in ssl3_get_certificate_request()
1382 * as ServerKeyExchange message may be skipped */
1383 n=s->method->ssl_get_message(s,
1384 SSL3_ST_CR_KEY_EXCH_A,
1385 SSL3_ST_CR_KEY_EXCH_B,
1389 if (!ok) return((int)n);
1391 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1393 #ifndef OPENSSL_NO_PSK
1394 /* In plain PSK ciphersuite, ServerKeyExchange can be
1395 omitted if no identity hint is sent. Set
1396 session->sess_cert anyway to avoid problems
1398 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1400 s->session->sess_cert=ssl_sess_cert_new();
1401 if (s->ctx->psk_identity_hint)
1402 OPENSSL_free(s->ctx->psk_identity_hint);
1403 s->ctx->psk_identity_hint = NULL;
1406 s->s3->tmp.reuse_message=1;
1410 param=p=(unsigned char *)s->init_msg;
1411 if (s->session->sess_cert != NULL)
1413 #ifndef OPENSSL_NO_RSA
1414 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1416 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1417 s->session->sess_cert->peer_rsa_tmp=NULL;
1420 #ifndef OPENSSL_NO_DH
1421 if (s->session->sess_cert->peer_dh_tmp)
1423 DH_free(s->session->sess_cert->peer_dh_tmp);
1424 s->session->sess_cert->peer_dh_tmp=NULL;
1427 #ifndef OPENSSL_NO_ECDH
1428 if (s->session->sess_cert->peer_ecdh_tmp)
1430 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1431 s->session->sess_cert->peer_ecdh_tmp=NULL;
1437 s->session->sess_cert=ssl_sess_cert_new();
1440 /* Total length of the parameters including the length prefix */
1443 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1444 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1445 EVP_MD_CTX_init(&md_ctx);
1447 al=SSL_AD_DECODE_ERROR;
1449 #ifndef OPENSSL_NO_PSK
1450 if (alg_k & SSL_kPSK)
1452 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1457 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1458 SSL_R_LENGTH_TOO_SHORT);
1463 /* Store PSK identity hint for later use, hint is used
1464 * in ssl3_send_client_key_exchange. Assume that the
1465 * maximum length of a PSK identity hint can be as
1466 * long as the maximum length of a PSK identity. */
1467 if (i > PSK_MAX_IDENTITY_LEN)
1469 al=SSL_AD_HANDSHAKE_FAILURE;
1470 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1471 SSL_R_DATA_LENGTH_TOO_LONG);
1474 if (i > n - param_len)
1476 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1477 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1482 /* If received PSK identity hint contains NULL
1483 * characters, the hint is truncated from the first
1484 * NULL. p may not be ending with NULL, so create a
1485 * NULL-terminated string. */
1486 memcpy(tmp_id_hint, p, i);
1487 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1488 if (s->ctx->psk_identity_hint != NULL)
1489 OPENSSL_free(s->ctx->psk_identity_hint);
1490 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1491 if (s->ctx->psk_identity_hint == NULL)
1493 al=SSL_AD_HANDSHAKE_FAILURE;
1494 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1502 #endif /* !OPENSSL_NO_PSK */
1503 #ifndef OPENSSL_NO_SRP
1504 if (alg_k & SSL_kSRP)
1509 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1510 SSL_R_LENGTH_TOO_SHORT);
1515 if (i > n - param_len)
1517 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1522 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1524 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1530 if (2 > n - param_len)
1532 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1533 SSL_R_LENGTH_TOO_SHORT);
1540 if (i > n - param_len)
1542 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1547 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1549 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1555 if (1 > n - param_len)
1557 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1558 SSL_R_LENGTH_TOO_SHORT);
1563 i = (unsigned int)(p[0]);
1566 if (i > n - param_len)
1568 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1573 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1580 if (2 > n - param_len)
1582 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1583 SSL_R_LENGTH_TOO_SHORT);
1590 if (i > n - param_len)
1592 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1597 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1599 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1605 if (!srp_verify_server_param(s, &al))
1607 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1611 /* We must check if there is a certificate */
1612 #ifndef OPENSSL_NO_RSA
1613 if (alg_a & SSL_aRSA)
1614 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1619 #ifndef OPENSSL_NO_DSA
1620 else if (alg_a & SSL_aDSS)
1621 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1625 #endif /* !OPENSSL_NO_SRP */
1626 #ifndef OPENSSL_NO_RSA
1627 if (alg_k & SSL_kRSA)
1629 if ((rsa=RSA_new()) == NULL)
1631 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1638 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1639 SSL_R_LENGTH_TOO_SHORT);
1644 if (i > n - param_len)
1646 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1651 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1653 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1658 if (2 > n - param_len)
1660 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1661 SSL_R_LENGTH_TOO_SHORT);
1668 if (i > n - param_len)
1670 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1675 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1677 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1683 /* this should be because we are using an export cipher */
1684 if (alg_a & SSL_aRSA)
1685 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1688 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1691 s->session->sess_cert->peer_rsa_tmp=rsa;
1694 #else /* OPENSSL_NO_RSA */
1698 #ifndef OPENSSL_NO_DH
1699 else if (alg_k & SSL_kDHE)
1701 if ((dh=DH_new()) == NULL)
1703 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1710 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1711 SSL_R_LENGTH_TOO_SHORT);
1716 if (i > n - param_len)
1718 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1723 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1725 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1730 if (2 > n - param_len)
1732 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1733 SSL_R_LENGTH_TOO_SHORT);
1740 if (i > n - param_len)
1742 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1747 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1749 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1754 if (2 > n - param_len)
1756 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1757 SSL_R_LENGTH_TOO_SHORT);
1764 if (i > n - param_len)
1766 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1771 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1773 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1779 if (!ssl_security(s, SSL_SECOP_TMP_DH,
1780 DH_security_bits(dh), 0, dh))
1782 al=SSL_AD_HANDSHAKE_FAILURE;
1783 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL);
1787 #ifndef OPENSSL_NO_RSA
1788 if (alg_a & SSL_aRSA)
1789 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1794 #ifndef OPENSSL_NO_DSA
1795 else if (alg_a & SSL_aDSS)
1796 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1798 /* else anonymous DH, so no certificate or pkey. */
1800 s->session->sess_cert->peer_dh_tmp=dh;
1803 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1805 al=SSL_AD_ILLEGAL_PARAMETER;
1806 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1809 #endif /* !OPENSSL_NO_DH */
1811 #ifndef OPENSSL_NO_ECDH
1812 else if (alg_k & SSL_kECDHE)
1815 const EC_GROUP *group;
1817 if ((ecdh=EC_KEY_new()) == NULL)
1819 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1823 /* Extract elliptic curve parameters and the
1824 * server's ephemeral ECDH public key.
1825 * Keep accumulating lengths of various components in
1826 * param_len and make sure it never exceeds n.
1829 /* XXX: For now we only support named (not generic) curves
1830 * and the ECParameters in this case is just three bytes. We
1831 * also need one byte for the length of the encoded point
1836 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1837 SSL_R_LENGTH_TOO_SHORT);
1840 /* Check curve is one of our preferences, if not server has
1841 * sent an invalid curve. ECParameters is 3 bytes.
1843 if (!tls1_check_curve(s, p, 3))
1845 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1849 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1851 al=SSL_AD_INTERNAL_ERROR;
1852 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1856 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1859 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1862 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1864 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1867 EC_GROUP_free(ngroup);
1869 group = EC_KEY_get0_group(ecdh);
1871 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1872 (EC_GROUP_get_degree(group) > 163))
1874 al=SSL_AD_EXPORT_RESTRICTION;
1875 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1881 /* Next, get the encoded ECPoint */
1882 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1883 ((bn_ctx = BN_CTX_new()) == NULL))
1885 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1889 encoded_pt_len = *p; /* length of encoded point */
1892 if ((encoded_pt_len > n - param_len) ||
1893 (EC_POINT_oct2point(group, srvr_ecpoint,
1894 p, encoded_pt_len, bn_ctx) == 0))
1896 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1899 param_len += encoded_pt_len;
1904 /* The ECC/TLS specification does not mention
1905 * the use of DSA to sign ECParameters in the server
1906 * key exchange message. We do support RSA and ECDSA.
1909 #ifndef OPENSSL_NO_RSA
1910 else if (alg_a & SSL_aRSA)
1911 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1913 #ifndef OPENSSL_NO_ECDSA
1914 else if (alg_a & SSL_aECDSA)
1915 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1917 /* else anonymous ECDH, so no certificate or pkey. */
1918 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1919 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1921 BN_CTX_free(bn_ctx);
1923 EC_POINT_free(srvr_ecpoint);
1924 srvr_ecpoint = NULL;
1928 al=SSL_AD_UNEXPECTED_MESSAGE;
1929 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1932 #endif /* !OPENSSL_NO_ECDH */
1935 /* p points to the next byte, there are 'n' bytes left */
1937 /* if it was signed, check the signature */
1940 if (SSL_USE_SIGALGS(s))
1945 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1946 SSL_R_LENGTH_TOO_SHORT);
1949 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1957 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1967 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1968 SSL_R_LENGTH_TOO_SHORT);
1973 j=EVP_PKEY_size(pkey);
1975 /* Check signature length. If n is 0 then signature is empty */
1976 if ((i != n) || (n > j) || (n <= 0))
1978 /* wrong packet length */
1979 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1983 #ifndef OPENSSL_NO_RSA
1984 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1991 for (num=2; num > 0; num--)
1993 EVP_MD_CTX_set_flags(&md_ctx,
1994 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1995 EVP_DigestInit_ex(&md_ctx,(num == 2)
1996 ?s->ctx->md5:s->ctx->sha1, NULL);
1997 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1998 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1999 EVP_DigestUpdate(&md_ctx,param,param_len);
2000 EVP_DigestFinal_ex(&md_ctx,q,&size);
2004 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
2008 al=SSL_AD_DECRYPT_ERROR;
2009 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
2015 al=SSL_AD_DECRYPT_ERROR;
2016 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2023 EVP_VerifyInit_ex(&md_ctx, md, NULL);
2024 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2025 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2026 EVP_VerifyUpdate(&md_ctx,param,param_len);
2027 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
2030 al=SSL_AD_DECRYPT_ERROR;
2031 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2038 /* aNULL, aSRP or kPSK do not need public keys */
2039 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
2041 /* Might be wrong key type, check it */
2042 if (ssl3_check_cert_and_algorithm(s))
2043 /* Otherwise this shouldn't happen */
2044 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2047 /* still data left over */
2050 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
2054 EVP_PKEY_free(pkey);
2055 EVP_MD_CTX_cleanup(&md_ctx);
2058 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2060 EVP_PKEY_free(pkey);
2061 #ifndef OPENSSL_NO_RSA
2065 #ifndef OPENSSL_NO_DH
2069 #ifndef OPENSSL_NO_ECDH
2070 BN_CTX_free(bn_ctx);
2071 EC_POINT_free(srvr_ecpoint);
2075 EVP_MD_CTX_cleanup(&md_ctx);
2079 int ssl3_get_certificate_request(SSL *s)
2082 unsigned long n,nc,l;
2083 unsigned int llen, ctype_num,i;
2085 const unsigned char *p,*q;
2087 STACK_OF(X509_NAME) *ca_sk=NULL;
2089 n=s->method->ssl_get_message(s,
2090 SSL3_ST_CR_CERT_REQ_A,
2091 SSL3_ST_CR_CERT_REQ_B,
2096 if (!ok) return((int)n);
2098 s->s3->tmp.cert_req=0;
2100 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2102 s->s3->tmp.reuse_message=1;
2103 /* If we get here we don't need any cached handshake records
2104 * as we wont be doing client auth.
2106 if (s->s3->handshake_buffer)
2108 if (!ssl3_digest_cached_records(s))
2114 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2116 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2117 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2121 /* TLS does not like anon-DH with client cert */
2122 if (s->version > SSL3_VERSION)
2124 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2126 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2127 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2132 p=d=(unsigned char *)s->init_msg;
2134 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2136 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2140 /* get the certificate types */
2142 if (s->cert->ctypes)
2144 OPENSSL_free(s->cert->ctypes);
2145 s->cert->ctypes = NULL;
2147 if (ctype_num > SSL3_CT_NUMBER)
2149 /* If we exceed static buffer copy all to cert structure */
2150 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2151 memcpy(s->cert->ctypes, p, ctype_num);
2152 s->cert->ctype_num = (size_t)ctype_num;
2153 ctype_num=SSL3_CT_NUMBER;
2155 for (i=0; i<ctype_num; i++)
2156 s->s3->tmp.ctype[i]= p[i];
2158 if (SSL_USE_SIGALGS(s))
2161 /* Check we have enough room for signature algorithms and
2162 * following length value.
2164 if ((unsigned long)(p - d + llen + 2) > n)
2166 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2167 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2170 /* Clear certificate digests and validity flags */
2171 for (i = 0; i < SSL_PKEY_NUM; i++)
2173 s->cert->pkeys[i].digest = NULL;
2174 s->cert->pkeys[i].valid_flags = 0;
2176 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen))
2178 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2179 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2182 if (!tls1_process_sigalgs(s))
2184 ssl3_send_alert(s,SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2185 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2191 /* get the CA RDNs */
2196 out=fopen("/tmp/vsign.der","w");
2197 fwrite(p,1,llen,out);
2202 if ((unsigned long)(p - d + llen) != n)
2204 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2205 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2209 for (nc=0; nc<llen; )
2212 if ((l+nc+2) > llen)
2214 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2215 goto cont; /* netscape bugs */
2216 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2217 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2223 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2225 /* If netscape tolerance is on, ignore errors */
2226 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2230 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2231 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2238 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2239 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2242 if (!sk_X509_NAME_push(ca_sk,xn))
2244 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2258 /* we should setup a certificate to return.... */
2259 s->s3->tmp.cert_req=1;
2260 s->s3->tmp.ctype_num=ctype_num;
2261 if (s->s3->tmp.ca_names != NULL)
2262 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2263 s->s3->tmp.ca_names=ca_sk;
2268 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2272 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2274 return(X509_NAME_cmp(*a,*b));
2276 #ifndef OPENSSL_NO_TLSEXT
2277 int ssl3_get_new_session_ticket(SSL *s)
2279 int ok,al,ret=0, ticklen;
2281 const unsigned char *p;
2284 n=s->method->ssl_get_message(s,
2285 SSL3_ST_CR_SESSION_TICKET_A,
2286 SSL3_ST_CR_SESSION_TICKET_B,
2287 SSL3_MT_NEWSESSION_TICKET,
2296 /* need at least ticket_lifetime_hint + ticket length */
2297 al = SSL_AD_DECODE_ERROR;
2298 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2302 p=d=(unsigned char *)s->init_msg;
2303 n2l(p, s->session->tlsext_tick_lifetime_hint);
2305 /* ticket_lifetime_hint + ticket_length + ticket */
2306 if (ticklen + 6 != n)
2308 al = SSL_AD_DECODE_ERROR;
2309 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2312 if (s->session->tlsext_tick)
2314 OPENSSL_free(s->session->tlsext_tick);
2315 s->session->tlsext_ticklen = 0;
2317 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2318 if (!s->session->tlsext_tick)
2320 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2323 memcpy(s->session->tlsext_tick, p, ticklen);
2324 s->session->tlsext_ticklen = ticklen;
2325 /* There are two ways to detect a resumed ticket session.
2326 * One is to set an appropriate session ID and then the server
2327 * must return a match in ServerHello. This allows the normal
2328 * client session ID matching to work and we know much
2329 * earlier that the ticket has been accepted.
2331 * The other way is to set zero length session ID when the
2332 * ticket is presented and rely on the handshake to determine
2333 * session resumption.
2335 * We choose the former approach because this fits in with
2336 * assumptions elsewhere in OpenSSL. The session ID is set
2337 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2340 EVP_Digest(p, ticklen,
2341 s->session->session_id, &s->session->session_id_length,
2342 #ifndef OPENSSL_NO_SHA256
2343 EVP_sha256(), NULL);
2350 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2355 int ssl3_get_cert_status(SSL *s)
2358 unsigned long resplen,n;
2359 const unsigned char *p;
2361 n=s->method->ssl_get_message(s,
2362 SSL3_ST_CR_CERT_STATUS_A,
2363 SSL3_ST_CR_CERT_STATUS_B,
2364 SSL3_MT_CERTIFICATE_STATUS,
2368 if (!ok) return((int)n);
2371 /* need at least status type + length */
2372 al = SSL_AD_DECODE_ERROR;
2373 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2376 p = (unsigned char *)s->init_msg;
2377 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2379 al = SSL_AD_DECODE_ERROR;
2380 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2384 if (resplen + 4 != n)
2386 al = SSL_AD_DECODE_ERROR;
2387 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2390 if (s->tlsext_ocsp_resp)
2391 OPENSSL_free(s->tlsext_ocsp_resp);
2392 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2393 if (!s->tlsext_ocsp_resp)
2395 al = SSL_AD_INTERNAL_ERROR;
2396 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2399 s->tlsext_ocsp_resplen = resplen;
2400 if (s->ctx->tlsext_status_cb)
2403 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2406 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2407 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2412 al = SSL_AD_INTERNAL_ERROR;
2413 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2419 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2424 int ssl3_get_server_done(SSL *s)
2429 n=s->method->ssl_get_message(s,
2430 SSL3_ST_CR_SRVR_DONE_A,
2431 SSL3_ST_CR_SRVR_DONE_B,
2432 SSL3_MT_SERVER_DONE,
2433 30, /* should be very small, like 0 :-) */
2436 if (!ok) return((int)n);
2439 /* should contain no data */
2440 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2441 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2449 int ssl3_send_client_key_exchange(SSL *s)
2453 unsigned long alg_k;
2454 #ifndef OPENSSL_NO_RSA
2456 EVP_PKEY *pkey=NULL;
2458 #ifndef OPENSSL_NO_KRB5
2460 #endif /* OPENSSL_NO_KRB5 */
2461 #ifndef OPENSSL_NO_ECDH
2462 EC_KEY *clnt_ecdh = NULL;
2463 const EC_POINT *srvr_ecpoint = NULL;
2464 EVP_PKEY *srvr_pub_pkey = NULL;
2465 unsigned char *encodedPoint = NULL;
2466 int encoded_pt_len = 0;
2467 BN_CTX * bn_ctx = NULL;
2470 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2472 p = ssl_handshake_start(s);
2474 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2476 /* Fool emacs indentation */
2478 #ifndef OPENSSL_NO_RSA
2479 else if (alg_k & SSL_kRSA)
2482 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2484 if (s->session->sess_cert == NULL)
2486 /* We should always have a server certificate with SSL_kRSA. */
2487 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2491 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2492 rsa=s->session->sess_cert->peer_rsa_tmp;
2495 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2496 if ((pkey == NULL) ||
2497 (pkey->type != EVP_PKEY_RSA) ||
2498 (pkey->pkey.rsa == NULL))
2500 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2504 EVP_PKEY_free(pkey);
2507 tmp_buf[0]=s->client_version>>8;
2508 tmp_buf[1]=s->client_version&0xff;
2509 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2512 s->session->master_key_length=sizeof tmp_buf;
2515 /* Fix buf for TLS and beyond */
2516 if (s->version > SSL3_VERSION)
2518 n=RSA_public_encrypt(sizeof tmp_buf,
2519 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2521 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2522 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2526 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2530 /* Fix buf for TLS and beyond */
2531 if (s->version > SSL3_VERSION)
2537 s->session->master_key_length=
2538 s->method->ssl3_enc->generate_master_secret(s,
2539 s->session->master_key,
2540 tmp_buf,sizeof tmp_buf);
2541 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2544 #ifndef OPENSSL_NO_KRB5
2545 else if (alg_k & SSL_kKRB5)
2547 krb5_error_code krb5rc;
2548 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2549 /* krb5_data krb5_ap_req; */
2550 krb5_data *enc_ticket;
2551 krb5_data authenticator, *authp = NULL;
2552 EVP_CIPHER_CTX ciph_ctx;
2553 const EVP_CIPHER *enc = NULL;
2554 unsigned char iv[EVP_MAX_IV_LENGTH];
2555 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2556 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2557 + EVP_MAX_IV_LENGTH];
2558 int padl, outl = sizeof(epms);
2560 EVP_CIPHER_CTX_init(&ciph_ctx);
2563 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2565 #endif /* KSSL_DEBUG */
2569 if (KRB5SENDAUTH) authp = &authenticator;
2570 #endif /* KRB5SENDAUTH */
2572 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2574 enc = kssl_map_enc(kssl_ctx->enctype);
2579 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2580 if (krb5rc && kssl_err.text)
2581 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2583 #endif /* KSSL_DEBUG */
2587 ssl3_send_alert(s,SSL3_AL_FATAL,
2588 SSL_AD_HANDSHAKE_FAILURE);
2589 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2594 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2595 ** in place of RFC 2712 KerberosWrapper, as in:
2597 ** Send ticket (copy to *p, set n = length)
2598 ** n = krb5_ap_req.length;
2599 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2600 ** if (krb5_ap_req.data)
2601 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2603 ** Now using real RFC 2712 KerberosWrapper
2604 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2605 ** Note: 2712 "opaque" types are here replaced
2606 ** with a 2-byte length followed by the value.
2608 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2609 ** Where "xx xx" = length bytes. Shown here with
2610 ** optional authenticator omitted.
2613 /* KerberosWrapper.Ticket */
2614 s2n(enc_ticket->length,p);
2615 memcpy(p, enc_ticket->data, enc_ticket->length);
2616 p+= enc_ticket->length;
2617 n = enc_ticket->length + 2;
2619 /* KerberosWrapper.Authenticator */
2620 if (authp && authp->length)
2622 s2n(authp->length,p);
2623 memcpy(p, authp->data, authp->length);
2625 n+= authp->length + 2;
2633 s2n(0,p);/* null authenticator length */
2637 tmp_buf[0]=s->client_version>>8;
2638 tmp_buf[1]=s->client_version&0xff;
2639 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2642 /* 20010420 VRS. Tried it this way; failed.
2643 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2644 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2645 ** kssl_ctx->length);
2646 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2649 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2650 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2652 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2654 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2656 if (outl > (int)sizeof epms)
2658 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2661 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2663 /* KerberosWrapper.EncryptedPreMasterSecret */
2665 memcpy(p, epms, outl);
2669 s->session->master_key_length=
2670 s->method->ssl3_enc->generate_master_secret(s,
2671 s->session->master_key,
2672 tmp_buf, sizeof tmp_buf);
2674 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2675 OPENSSL_cleanse(epms, outl);
2678 #ifndef OPENSSL_NO_DH
2679 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2681 DH *dh_srvr,*dh_clnt;
2682 SESS_CERT *scert = s->session->sess_cert;
2686 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2687 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2691 if (scert->peer_dh_tmp != NULL)
2692 dh_srvr=scert->peer_dh_tmp;
2695 /* we get them from the cert */
2696 int idx = scert->peer_cert_type;
2697 EVP_PKEY *spkey = NULL;
2700 spkey = X509_get_pubkey(
2701 scert->peer_pkeys[idx].x509);
2704 dh_srvr = EVP_PKEY_get1_DH(spkey);
2705 EVP_PKEY_free(spkey);
2707 if (dh_srvr == NULL)
2709 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2710 ERR_R_INTERNAL_ERROR);
2714 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2716 /* Use client certificate key */
2717 EVP_PKEY *clkey = s->cert->key->privatekey;
2720 dh_clnt = EVP_PKEY_get1_DH(clkey);
2721 if (dh_clnt == NULL)
2723 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2724 ERR_R_INTERNAL_ERROR);
2730 /* generate a new random key */
2731 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2733 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2736 if (!DH_generate_key(dh_clnt))
2738 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2744 /* use the 'p' output buffer for the DH key, but
2745 * make sure to clear it out afterwards */
2747 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2748 if (scert->peer_dh_tmp == NULL)
2753 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2758 /* generate master key from the result */
2759 s->session->master_key_length=
2760 s->method->ssl3_enc->generate_master_secret(s,
2761 s->session->master_key,p,n);
2765 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2769 /* send off the data */
2770 n=BN_num_bytes(dh_clnt->pub_key);
2772 BN_bn2bin(dh_clnt->pub_key,p);
2778 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2782 #ifndef OPENSSL_NO_ECDH
2783 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2785 const EC_GROUP *srvr_group = NULL;
2787 int ecdh_clnt_cert = 0;
2790 if (s->session->sess_cert == NULL)
2792 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2793 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2797 /* Did we send out the client's
2798 * ECDH share for use in premaster
2799 * computation as part of client certificate?
2800 * If so, set ecdh_clnt_cert to 1.
2802 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2804 /* XXX: For now, we do not support client
2805 * authentication using ECDH certificates.
2806 * To add such support, one needs to add
2807 * code that checks for appropriate
2808 * conditions and sets ecdh_clnt_cert to 1.
2809 * For example, the cert have an ECC
2810 * key on the same curve as the server's
2811 * and the key should be authorized for
2814 * One also needs to add code in ssl3_connect
2815 * to skip sending the certificate verify
2818 * if ((s->cert->key->privatekey != NULL) &&
2819 * (s->cert->key->privatekey->type ==
2820 * EVP_PKEY_EC) && ...)
2821 * ecdh_clnt_cert = 1;
2825 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2827 tkey = s->session->sess_cert->peer_ecdh_tmp;
2831 /* Get the Server Public Key from Cert */
2832 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2833 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2834 if ((srvr_pub_pkey == NULL) ||
2835 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2836 (srvr_pub_pkey->pkey.ec == NULL))
2838 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2839 ERR_R_INTERNAL_ERROR);
2843 tkey = srvr_pub_pkey->pkey.ec;
2846 srvr_group = EC_KEY_get0_group(tkey);
2847 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2849 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2851 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2852 ERR_R_INTERNAL_ERROR);
2856 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2858 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2862 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2864 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2869 /* Reuse key info from our certificate
2870 * We only need our private key to perform
2871 * the ECDH computation.
2873 const BIGNUM *priv_key;
2874 tkey = s->cert->key->privatekey->pkey.ec;
2875 priv_key = EC_KEY_get0_private_key(tkey);
2876 if (priv_key == NULL)
2878 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2881 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2883 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2889 /* Generate a new ECDH key pair */
2890 if (!(EC_KEY_generate_key(clnt_ecdh)))
2892 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2897 /* use the 'p' output buffer for the ECDH key, but
2898 * make sure to clear it out afterwards
2901 field_size = EC_GROUP_get_degree(srvr_group);
2902 if (field_size <= 0)
2904 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2908 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2911 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2916 /* generate master key from the result */
2917 s->session->master_key_length = s->method->ssl3_enc \
2918 -> generate_master_secret(s,
2919 s->session->master_key,
2922 memset(p, 0, n); /* clean up */
2926 /* Send empty client key exch message */
2931 /* First check the size of encoding and
2932 * allocate memory accordingly.
2935 EC_POINT_point2oct(srvr_group,
2936 EC_KEY_get0_public_key(clnt_ecdh),
2937 POINT_CONVERSION_UNCOMPRESSED,
2940 encodedPoint = (unsigned char *)
2941 OPENSSL_malloc(encoded_pt_len *
2942 sizeof(unsigned char));
2943 bn_ctx = BN_CTX_new();
2944 if ((encodedPoint == NULL) ||
2947 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2951 /* Encode the public key */
2952 n = EC_POINT_point2oct(srvr_group,
2953 EC_KEY_get0_public_key(clnt_ecdh),
2954 POINT_CONVERSION_UNCOMPRESSED,
2955 encodedPoint, encoded_pt_len, bn_ctx);
2957 *p = n; /* length of encoded point */
2958 /* Encoded point will be copied here */
2960 /* copy the point */
2961 memcpy((unsigned char *)p, encodedPoint, n);
2962 /* increment n to account for length field */
2966 /* Free allocated memory */
2967 BN_CTX_free(bn_ctx);
2968 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2969 if (clnt_ecdh != NULL)
2970 EC_KEY_free(clnt_ecdh);
2971 EVP_PKEY_free(srvr_pub_pkey);
2973 #endif /* !OPENSSL_NO_ECDH */
2974 else if (alg_k & SSL_kGOST)
2976 /* GOST key exchange message creation */
2977 EVP_PKEY_CTX *pkey_ctx;
2980 unsigned int md_len;
2982 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2983 EVP_MD_CTX *ukm_hash;
2986 /* Get server sertificate PKEY and create ctx from it */
2987 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2989 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2991 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2995 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2996 /* If we have send a certificate, and certificate key
2998 * parameters match those of server certificate, use
2999 * certificate key for key exchange
3002 /* Otherwise, generate ephemeral key pair */
3004 EVP_PKEY_encrypt_init(pkey_ctx);
3005 /* Generate session key */
3006 RAND_bytes(premaster_secret,32);
3007 /* If we have client certificate, use its secret as peer key */
3008 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
3009 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
3010 /* If there was an error - just ignore it. Ephemeral key
3016 /* Compute shared IV and store it in algorithm-specific
3018 ukm_hash = EVP_MD_CTX_create();
3019 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
3020 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
3021 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
3022 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
3023 EVP_MD_CTX_destroy(ukm_hash);
3024 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
3026 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3030 /* Make GOST keytransport blob message */
3031 /*Encapsulate it into sequence */
3032 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
3034 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
3035 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3042 *(p++)= msglen & 0xff;
3047 *(p++)= msglen & 0xff;
3050 memcpy(p, tmp, msglen);
3051 /* Check if pubkey from client certificate was used */
3052 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
3054 /* Set flag "skip certificate verify" */
3055 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3057 EVP_PKEY_CTX_free(pkey_ctx);
3058 s->session->master_key_length=
3059 s->method->ssl3_enc->generate_master_secret(s,
3060 s->session->master_key,premaster_secret,32);
3061 EVP_PKEY_free(pub_key);
3064 #ifndef OPENSSL_NO_SRP
3065 else if (alg_k & SSL_kSRP)
3067 if (s->srp_ctx.A != NULL)
3069 /* send off the data */
3070 n=BN_num_bytes(s->srp_ctx.A);
3072 BN_bn2bin(s->srp_ctx.A,p);
3077 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3080 if (s->session->srp_username != NULL)
3081 OPENSSL_free(s->session->srp_username);
3082 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3083 if (s->session->srp_username == NULL)
3085 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3086 ERR_R_MALLOC_FAILURE);
3090 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3092 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3097 #ifndef OPENSSL_NO_PSK
3098 else if (alg_k & SSL_kPSK)
3100 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes
3101 * to return a \0-terminated identity. The last byte
3102 * is for us for simulating strnlen. */
3103 char identity[PSK_MAX_IDENTITY_LEN + 2];
3104 size_t identity_len;
3105 unsigned char *t = NULL;
3106 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3107 unsigned int pre_ms_len = 0, psk_len = 0;
3111 if (s->psk_client_callback == NULL)
3113 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3114 SSL_R_PSK_NO_CLIENT_CB);
3118 memset(identity, 0, sizeof(identity));
3119 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3120 identity, sizeof(identity) - 1,
3121 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3122 if (psk_len > PSK_MAX_PSK_LEN)
3124 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3125 ERR_R_INTERNAL_ERROR);
3128 else if (psk_len == 0)
3130 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3131 SSL_R_PSK_IDENTITY_NOT_FOUND);
3134 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
3135 identity_len = strlen(identity);
3136 if (identity_len > PSK_MAX_IDENTITY_LEN)
3138 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3139 ERR_R_INTERNAL_ERROR);
3142 /* create PSK pre_master_secret */
3143 pre_ms_len = 2+psk_len+2+psk_len;
3145 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3147 memset(t, 0, psk_len);
3151 if (s->session->psk_identity_hint != NULL)
3152 OPENSSL_free(s->session->psk_identity_hint);
3153 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3154 if (s->ctx->psk_identity_hint != NULL &&
3155 s->session->psk_identity_hint == NULL)
3157 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3158 ERR_R_MALLOC_FAILURE);
3162 if (s->session->psk_identity != NULL)
3163 OPENSSL_free(s->session->psk_identity);
3164 s->session->psk_identity = BUF_strdup(identity);
3165 if (s->session->psk_identity == NULL)
3167 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3168 ERR_R_MALLOC_FAILURE);
3172 s->session->master_key_length =
3173 s->method->ssl3_enc->generate_master_secret(s,
3174 s->session->master_key,
3175 psk_or_pre_ms, pre_ms_len);
3176 s2n(identity_len, p);
3177 memcpy(p, identity, identity_len);
3178 n = 2 + identity_len;
3181 OPENSSL_cleanse(identity, sizeof(identity));
3182 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3185 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3192 ssl3_send_alert(s, SSL3_AL_FATAL,
3193 SSL_AD_HANDSHAKE_FAILURE);
3194 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3195 ERR_R_INTERNAL_ERROR);
3199 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3200 s->state=SSL3_ST_CW_KEY_EXCH_B;
3203 /* SSL3_ST_CW_KEY_EXCH_B */
3204 return ssl_do_write(s);
3206 #ifndef OPENSSL_NO_ECDH
3207 BN_CTX_free(bn_ctx);
3208 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3209 if (clnt_ecdh != NULL)
3210 EC_KEY_free(clnt_ecdh);
3211 EVP_PKEY_free(srvr_pub_pkey);
3216 int ssl3_send_client_verify(SSL *s)
3219 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3221 EVP_PKEY_CTX *pctx=NULL;
3227 EVP_MD_CTX_init(&mctx);
3229 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3231 p= ssl_handshake_start(s);
3232 pkey=s->cert->key->privatekey;
3233 /* Create context from key and test if sha1 is allowed as digest */
3234 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3235 EVP_PKEY_sign_init(pctx);
3236 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3238 if (!SSL_USE_SIGALGS(s))
3239 s->method->ssl3_enc->cert_verify_mac(s,
3241 &(data[MD5_DIGEST_LENGTH]));
3247 /* For TLS v1.2 send signature algorithm and signature
3248 * using agreed digest and cached handshake records.
3250 if (SSL_USE_SIGALGS(s))
3254 const EVP_MD *md = s->cert->key->digest;
3255 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3257 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3259 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3260 ERR_R_INTERNAL_ERROR);
3265 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3268 if (!EVP_SignInit_ex(&mctx, md, NULL)
3269 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3270 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3272 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3278 if (!ssl3_digest_cached_records(s))
3282 #ifndef OPENSSL_NO_RSA
3283 if (pkey->type == EVP_PKEY_RSA)
3285 s->method->ssl3_enc->cert_verify_mac(s,
3288 if (RSA_sign(NID_md5_sha1, data,
3289 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3290 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3292 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3300 #ifndef OPENSSL_NO_DSA
3301 if (pkey->type == EVP_PKEY_DSA)
3303 if (!DSA_sign(pkey->save_type,
3304 &(data[MD5_DIGEST_LENGTH]),
3305 SHA_DIGEST_LENGTH,&(p[2]),
3306 (unsigned int *)&j,pkey->pkey.dsa))
3308 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3316 #ifndef OPENSSL_NO_ECDSA
3317 if (pkey->type == EVP_PKEY_EC)
3319 if (!ECDSA_sign(pkey->save_type,
3320 &(data[MD5_DIGEST_LENGTH]),
3321 SHA_DIGEST_LENGTH,&(p[2]),
3322 (unsigned int *)&j,pkey->pkey.ec))
3324 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3333 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3335 unsigned char signbuf[64];
3338 s->method->ssl3_enc->cert_verify_mac(s,
3339 NID_id_GostR3411_94,
3341 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3342 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3343 ERR_R_INTERNAL_ERROR);
3346 for (i=63,j=0; i>=0; j++, i--) {
3354 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3357 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3358 s->state=SSL3_ST_CW_CERT_VRFY_B;
3360 EVP_MD_CTX_cleanup(&mctx);
3361 EVP_PKEY_CTX_free(pctx);
3362 return ssl_do_write(s);
3364 EVP_MD_CTX_cleanup(&mctx);
3365 EVP_PKEY_CTX_free(pctx);
3369 /* Check a certificate can be used for client authentication. Currently
3370 * check cert exists, if we have a suitable digest for TLS 1.2 if
3371 * static DH client certificates can be used and optionally checks
3372 * suitability for Suite B.
3374 static int ssl3_check_client_certificate(SSL *s)
3376 unsigned long alg_k;
3377 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3379 /* If no suitable signature algorithm can't use certificate */
3380 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3382 /* If strict mode check suitability of chain before using it.
3383 * This also adjusts suite B digest if necessary.
3385 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3386 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3388 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3389 /* See if we can use client certificate for fixed DH */
3390 if (alg_k & (SSL_kDHr|SSL_kDHd))
3392 SESS_CERT *scert = s->session->sess_cert;
3393 int i = scert->peer_cert_type;
3394 EVP_PKEY *clkey = NULL, *spkey = NULL;
3395 clkey = s->cert->key->privatekey;
3396 /* If client key not DH assume it can be used */
3397 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3400 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3403 /* Compare server and client parameters */
3404 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3405 EVP_PKEY_free(spkey);
3409 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3414 int ssl3_send_client_certificate(SSL *s)
3417 EVP_PKEY *pkey=NULL;
3420 if (s->state == SSL3_ST_CW_CERT_A)
3422 /* Let cert callback update client certificates if required */
3423 if (s->cert->cert_cb)
3425 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3428 s->rwstate=SSL_X509_LOOKUP;
3433 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3436 s->rwstate=SSL_NOTHING;
3438 if (ssl3_check_client_certificate(s))
3439 s->state=SSL3_ST_CW_CERT_C;
3441 s->state=SSL3_ST_CW_CERT_B;
3444 /* We need to get a client cert */
3445 if (s->state == SSL3_ST_CW_CERT_B)
3447 /* If we get an error, we need to
3448 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3449 * We then get retied later */
3451 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3454 s->rwstate=SSL_X509_LOOKUP;
3457 s->rwstate=SSL_NOTHING;
3458 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3460 s->state=SSL3_ST_CW_CERT_B;
3461 if ( !SSL_use_certificate(s,x509) ||
3462 !SSL_use_PrivateKey(s,pkey))
3468 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3471 if (x509 != NULL) X509_free(x509);
3472 if (pkey != NULL) EVP_PKEY_free(pkey);
3473 if (i && !ssl3_check_client_certificate(s))
3477 if (s->version == SSL3_VERSION)
3479 s->s3->tmp.cert_req=0;
3480 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3485 s->s3->tmp.cert_req=2;
3489 /* Ok, we have a cert */
3490 s->state=SSL3_ST_CW_CERT_C;
3493 if (s->state == SSL3_ST_CW_CERT_C)
3495 s->state=SSL3_ST_CW_CERT_D;
3496 if (!ssl3_output_cert_chain(s,
3497 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3499 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3500 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3504 /* SSL3_ST_CW_CERT_D */
3505 return ssl_do_write(s);
3508 #define has_bits(i,m) (((i)&(m)) == (m))
3510 int ssl3_check_cert_and_algorithm(SSL *s)
3514 EVP_PKEY *pkey=NULL;
3516 #ifndef OPENSSL_NO_RSA
3519 #ifndef OPENSSL_NO_DH
3523 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3524 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3526 /* we don't have a certificate */
3527 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3530 sc=s->session->sess_cert;
3533 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3537 #ifndef OPENSSL_NO_RSA
3538 rsa=s->session->sess_cert->peer_rsa_tmp;
3540 #ifndef OPENSSL_NO_DH
3541 dh=s->session->sess_cert->peer_dh_tmp;
3544 /* This is the passed certificate */
3546 idx=sc->peer_cert_type;
3547 #ifndef OPENSSL_NO_ECDH
3548 if (idx == SSL_PKEY_ECC)
3550 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3552 { /* check failed */
3553 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3561 else if (alg_a & SSL_aECDSA)
3563 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3566 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3568 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3572 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3573 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3574 EVP_PKEY_free(pkey);
3577 /* Check that we have a certificate if we require one */
3578 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3580 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3583 #ifndef OPENSSL_NO_DSA
3584 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3586 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3590 #ifndef OPENSSL_NO_RSA
3591 if ((alg_k & SSL_kRSA) &&
3592 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3594 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3598 #ifndef OPENSSL_NO_DH
3599 if ((alg_k & SSL_kDHE) &&
3600 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3602 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3605 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3606 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3608 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3611 #ifndef OPENSSL_NO_DSA
3612 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3613 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3615 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3621 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3623 #ifndef OPENSSL_NO_RSA
3624 if (alg_k & SSL_kRSA)
3627 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3629 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3635 #ifndef OPENSSL_NO_DH
3636 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3639 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3641 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3648 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3654 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3659 /* Check to see if handshake is full or resumed. Usually this is just a
3660 * case of checking to see if a cache hit has occurred. In the case of
3661 * session tickets we have to check the next message to be sure.
3664 #ifndef OPENSSL_NO_TLSEXT
3665 # ifndef OPENSSL_NO_NEXTPROTONEG
3666 int ssl3_send_next_proto(SSL *s)
3668 unsigned int len, padding_len;
3671 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3673 len = s->next_proto_negotiated_len;
3674 padding_len = 32 - ((len + 2) % 32);
3675 d = (unsigned char *)s->init_buf->data;
3677 memcpy(d + 5, s->next_proto_negotiated, len);
3678 d[5 + len] = padding_len;
3679 memset(d + 6 + len, 0, padding_len);
3680 *(d++)=SSL3_MT_NEXT_PROTO;
3681 l2n3(2 + len + padding_len, d);
3682 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3683 s->init_num = 4 + 2 + len + padding_len;
3687 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3692 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3695 #ifndef OPENSSL_NO_ENGINE
3696 if (s->ctx->client_cert_engine)
3698 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3699 SSL_get_client_CA_list(s),
3700 px509, ppkey, NULL, NULL, NULL);
3705 if (s->ctx->client_cert_cb)
3706 i = s->ctx->client_cert_cb(s,px509,ppkey);