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++;
285 case SSL3_ST_CW_CLNT_HELLO_A:
286 case SSL3_ST_CW_CLNT_HELLO_B:
289 ret=ssl3_client_hello(s);
290 if (ret <= 0) goto end;
291 s->state=SSL3_ST_CR_SRVR_HELLO_A;
294 /* turn on buffering for the next lot of output */
295 if (s->bbio != s->wbio)
296 s->wbio=BIO_push(s->bbio,s->wbio);
300 case SSL3_ST_CR_SRVR_HELLO_A:
301 case SSL3_ST_CR_SRVR_HELLO_B:
302 ret=ssl3_get_server_hello(s);
303 if (ret <= 0) goto end;
307 s->state=SSL3_ST_CR_FINISHED_A;
308 #ifndef OPENSSL_NO_TLSEXT
309 if (s->tlsext_ticket_expected)
311 /* receive renewed session ticket */
312 s->state=SSL3_ST_CR_SESSION_TICKET_A;
318 s->state=SSL3_ST_CR_CERT_A;
322 case SSL3_ST_CR_CERT_A:
323 case SSL3_ST_CR_CERT_B:
324 #ifndef OPENSSL_NO_TLSEXT
325 ret=ssl3_check_finished(s);
326 if (ret <= 0) goto end;
330 if (s->tlsext_ticket_expected)
331 s->state=SSL3_ST_CR_SESSION_TICKET_A;
333 s->state=SSL3_ST_CR_FINISHED_A;
338 /* Check if it is anon DH/ECDH, SRP auth */
340 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) &&
341 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
343 ret=ssl3_get_server_certificate(s);
344 if (ret <= 0) goto end;
345 #ifndef OPENSSL_NO_TLSEXT
346 if (s->tlsext_status_expected)
347 s->state=SSL3_ST_CR_CERT_STATUS_A;
349 s->state=SSL3_ST_CR_KEY_EXCH_A;
354 s->state=SSL3_ST_CR_KEY_EXCH_A;
361 s->state=SSL3_ST_CR_KEY_EXCH_A;
366 case SSL3_ST_CR_KEY_EXCH_A:
367 case SSL3_ST_CR_KEY_EXCH_B:
368 ret=ssl3_get_key_exchange(s);
369 if (ret <= 0) goto end;
370 s->state=SSL3_ST_CR_CERT_REQ_A;
373 /* at this point we check that we have the
374 * required stuff from the server */
375 if (!ssl3_check_cert_and_algorithm(s))
382 case SSL3_ST_CR_CERT_REQ_A:
383 case SSL3_ST_CR_CERT_REQ_B:
384 ret=ssl3_get_certificate_request(s);
385 if (ret <= 0) goto end;
386 s->state=SSL3_ST_CR_SRVR_DONE_A;
390 case SSL3_ST_CR_SRVR_DONE_A:
391 case SSL3_ST_CR_SRVR_DONE_B:
392 ret=ssl3_get_server_done(s);
393 if (ret <= 0) goto end;
394 #ifndef OPENSSL_NO_SRP
395 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
397 if ((ret = SRP_Calc_A_param(s))<=0)
399 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
400 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
405 if (s->s3->tmp.cert_req)
406 s->state=SSL3_ST_CW_CERT_A;
408 s->state=SSL3_ST_CW_KEY_EXCH_A;
413 case SSL3_ST_CW_CERT_A:
414 case SSL3_ST_CW_CERT_B:
415 case SSL3_ST_CW_CERT_C:
416 case SSL3_ST_CW_CERT_D:
417 ret=ssl3_send_client_certificate(s);
418 if (ret <= 0) goto end;
419 s->state=SSL3_ST_CW_KEY_EXCH_A;
423 case SSL3_ST_CW_KEY_EXCH_A:
424 case SSL3_ST_CW_KEY_EXCH_B:
425 ret=ssl3_send_client_key_exchange(s);
426 if (ret <= 0) goto end;
427 /* EAY EAY EAY need to check for DH fix cert
429 /* For TLS, cert_req is set to 2, so a cert chain
430 * of nothing is sent, but no verify packet is sent */
431 /* XXX: For now, we do not support client
432 * authentication in ECDH cipher suites with
433 * ECDH (rather than ECDSA) certificates.
434 * We need to skip the certificate verify
435 * message when client's ECDH public key is sent
436 * inside the client certificate.
438 if (s->s3->tmp.cert_req == 1)
440 s->state=SSL3_ST_CW_CERT_VRFY_A;
444 s->state=SSL3_ST_CW_CHANGE_A;
445 s->s3->change_cipher_spec=0;
447 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
449 s->state=SSL3_ST_CW_CHANGE_A;
450 s->s3->change_cipher_spec=0;
456 case SSL3_ST_CW_CERT_VRFY_A:
457 case SSL3_ST_CW_CERT_VRFY_B:
458 ret=ssl3_send_client_verify(s);
459 if (ret <= 0) goto end;
460 s->state=SSL3_ST_CW_CHANGE_A;
462 s->s3->change_cipher_spec=0;
465 case SSL3_ST_CW_CHANGE_A:
466 case SSL3_ST_CW_CHANGE_B:
467 ret=ssl3_send_change_cipher_spec(s,
468 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
469 if (ret <= 0) goto end;
471 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
472 s->state=SSL3_ST_CW_FINISHED_A;
474 if (s->s3->next_proto_neg_seen)
475 s->state=SSL3_ST_CW_NEXT_PROTO_A;
477 s->state=SSL3_ST_CW_FINISHED_A;
481 s->session->cipher=s->s3->tmp.new_cipher;
482 #ifdef OPENSSL_NO_COMP
483 s->session->compress_meth=0;
485 if (s->s3->tmp.new_compression == NULL)
486 s->session->compress_meth=0;
488 s->session->compress_meth=
489 s->s3->tmp.new_compression->id;
491 if (!s->method->ssl3_enc->setup_key_block(s))
497 if (!s->method->ssl3_enc->change_cipher_state(s,
498 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
506 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
507 case SSL3_ST_CW_NEXT_PROTO_A:
508 case SSL3_ST_CW_NEXT_PROTO_B:
509 ret=ssl3_send_next_proto(s);
510 if (ret <= 0) goto end;
511 s->state=SSL3_ST_CW_FINISHED_A;
515 case SSL3_ST_CW_FINISHED_A:
516 case SSL3_ST_CW_FINISHED_B:
517 ret=ssl3_send_finished(s,
518 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
519 s->method->ssl3_enc->client_finished_label,
520 s->method->ssl3_enc->client_finished_label_len);
521 if (ret <= 0) goto end;
522 s->s3->flags |= SSL3_FLAGS_CCS_OK;
523 s->state=SSL3_ST_CW_FLUSH;
526 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
529 s->s3->tmp.next_state=SSL_ST_OK;
530 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
533 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
534 s->s3->delay_buf_pop_ret=0;
539 #ifndef OPENSSL_NO_TLSEXT
540 /* Allow NewSessionTicket if ticket expected */
541 if (s->tlsext_ticket_expected)
542 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
546 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
551 #ifndef OPENSSL_NO_TLSEXT
552 case SSL3_ST_CR_SESSION_TICKET_A:
553 case SSL3_ST_CR_SESSION_TICKET_B:
554 ret=ssl3_get_new_session_ticket(s);
555 if (ret <= 0) goto end;
556 s->state=SSL3_ST_CR_FINISHED_A;
560 case SSL3_ST_CR_CERT_STATUS_A:
561 case SSL3_ST_CR_CERT_STATUS_B:
562 ret=ssl3_get_cert_status(s);
563 if (ret <= 0) goto end;
564 s->state=SSL3_ST_CR_KEY_EXCH_A;
569 case SSL3_ST_CR_FINISHED_A:
570 case SSL3_ST_CR_FINISHED_B:
572 s->s3->flags |= SSL3_FLAGS_CCS_OK;
573 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
574 SSL3_ST_CR_FINISHED_B);
575 if (ret <= 0) goto end;
578 s->state=SSL3_ST_CW_CHANGE_A;
584 case SSL3_ST_CW_FLUSH:
585 s->rwstate=SSL_WRITING;
586 if (BIO_flush(s->wbio) <= 0)
591 s->rwstate=SSL_NOTHING;
592 s->state=s->s3->tmp.next_state;
596 /* clean a few things up */
597 ssl3_cleanup_key_block(s);
599 if (s->init_buf != NULL)
601 BUF_MEM_free(s->init_buf);
605 /* If we are not 'joining' the last two packets,
606 * remove the buffering now */
607 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
608 ssl_free_wbio_buffer(s);
609 /* else do it later in ssl3_write */
615 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
616 if (s->hit) s->ctx->stats.sess_hit++;
620 s->handshake_func=ssl3_connect;
621 s->ctx->stats.sess_connect_good++;
623 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
629 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
635 /* did we do anything */
636 if (!s->s3->tmp.reuse_message && !skip)
640 if ((ret=BIO_flush(s->wbio)) <= 0)
644 if ((cb != NULL) && (s->state != state))
648 cb(s,SSL_CB_CONNECT_LOOP,1);
659 cb(s,SSL_CB_CONNECT_EXIT,ret);
664 int ssl3_client_hello(SSL *s)
671 #ifndef OPENSSL_NO_COMP
676 buf=(unsigned char *)s->init_buf->data;
677 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
679 SSL_SESSION *sess = s->session;
680 if ((sess == NULL) ||
681 (sess->ssl_version != s->version) ||
682 #ifdef OPENSSL_NO_TLSEXT
683 !sess->session_id_length ||
685 (!sess->session_id_length && !sess->tlsext_tick) ||
687 (sess->not_resumable))
689 if (!ssl_get_new_session(s,0))
692 if (s->method->version == DTLS_ANY_VERSION)
694 /* Determine which DTLS version to use */
695 int options = s->options;
696 /* If DTLS 1.2 disabled correct the version number */
697 if (options & SSL_OP_NO_DTLSv1_2)
701 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
704 /* Disabling all versions is silly: return an
707 if (options & SSL_OP_NO_DTLSv1)
709 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
712 /* Update method so we don't use any DTLS 1.2
715 s->method = DTLSv1_client_method();
716 s->version = DTLS1_VERSION;
720 /* We only support one version: update method */
721 if (options & SSL_OP_NO_DTLSv1)
722 s->method = DTLSv1_2_client_method();
723 s->version = DTLS1_2_VERSION;
725 s->client_version = s->version;
727 /* else use the pre-loaded session */
729 p=s->s3->client_random;
731 /* for DTLS if client_random is initialized, reuse it, we are
732 * required to use same upon reply to HelloVerify */
737 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
750 ssl_fill_hello_random(s, 0, p,
751 sizeof(s->s3->client_random));
753 /* Do the message type and length last */
754 d=p= ssl_handshake_start(s);
756 /* version indicates the negotiated version: for example from
757 * an SSLv2/v3 compatible client hello). The client_version
758 * field is the maximum version we permit and it is also
759 * used in RSA encrypted premaster secrets. Some servers can
760 * choke if we initially report a higher version then
761 * renegotiate to a lower one in the premaster secret. This
762 * didn't happen with TLS 1.0 as most servers supported it
763 * but it can with TLS 1.1 or later if the server only supports
766 * Possible scenario with previous logic:
767 * 1. Client hello indicates TLS 1.2
768 * 2. Server hello says TLS 1.0
769 * 3. RSA encrypted premaster secret uses 1.2.
770 * 4. Handhaked proceeds using TLS 1.0.
771 * 5. Server sends hello request to renegotiate.
772 * 6. Client hello indicates TLS v1.0 as we now
773 * know that is maximum server supports.
774 * 7. Server chokes on RSA encrypted premaster secret
775 * containing version 1.0.
777 * For interoperability it should be OK to always use the
778 * maximum version we support in client hello and then rely
779 * on the checking of version to ensure the servers isn't
780 * being inconsistent: for example initially negotiating with
781 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
782 * client_version in client hello and not resetting it to
783 * the negotiated version.
786 *(p++)=s->version>>8;
787 *(p++)=s->version&0xff;
788 s->client_version=s->version;
790 *(p++)=s->client_version>>8;
791 *(p++)=s->client_version&0xff;
795 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
802 i=s->session->session_id_length;
806 if (i > (int)sizeof(s->session->session_id))
808 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
811 memcpy(p,s->session->session_id,i);
815 /* cookie stuff for DTLS */
818 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
820 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
823 *(p++) = s->d1->cookie_len;
824 memcpy(p, s->d1->cookie, s->d1->cookie_len);
825 p += s->d1->cookie_len;
828 /* Ciphers supported */
829 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
832 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
835 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
836 /* Some servers hang if client hello > 256 bytes
837 * as hack workaround chop number of supported ciphers
838 * to keep it well below this if we use TLS v1.2
840 if (TLS1_get_version(s) >= TLS1_2_VERSION
841 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
842 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
848 #ifdef OPENSSL_NO_COMP
852 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
855 j=sk_SSL_COMP_num(s->ctx->comp_methods);
859 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
863 *(p++)=0; /* Add the NULL method */
865 #ifndef OPENSSL_NO_TLSEXT
867 if (ssl_prepare_clienthello_tlsext(s) <= 0)
869 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
872 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
874 ssl3_send_alert(s,SSL3_AL_FATAL,al);
875 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
881 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
882 s->state=SSL3_ST_CW_CLNT_HELLO_B;
885 /* SSL3_ST_CW_CLNT_HELLO_B */
886 return ssl_do_write(s);
891 int ssl3_get_server_hello(SSL *s)
893 STACK_OF(SSL_CIPHER) *sk;
897 int i,al=SSL_AD_INTERNAL_ERROR,ok;
900 #ifndef OPENSSL_NO_COMP
903 /* Hello verify request and/or server hello version may not
904 * match so set first packet if we're negotiating version.
909 n=s->method->ssl_get_message(s,
910 SSL3_ST_CR_SRVR_HELLO_A,
911 SSL3_ST_CR_SRVR_HELLO_B,
916 if (!ok) return((int)n);
921 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
923 if ( s->d1->send_cookie == 0)
925 s->s3->tmp.reuse_message = 1;
928 else /* already sent a cookie */
930 al=SSL_AD_UNEXPECTED_MESSAGE;
931 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
937 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
939 al=SSL_AD_UNEXPECTED_MESSAGE;
940 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
944 d=p=(unsigned char *)s->init_msg;
945 if (s->method->version == DTLS_ANY_VERSION)
947 /* Work out correct protocol version to use */
948 int hversion = (p[0] << 8)|p[1];
949 int options = s->options;
950 if (hversion == DTLS1_2_VERSION
951 && !(options & SSL_OP_NO_DTLSv1_2))
952 s->method = DTLSv1_2_client_method();
953 else if (tls1_suiteb(s))
955 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
956 s->version = hversion;
957 al = SSL_AD_PROTOCOL_VERSION;
960 else if (hversion == DTLS1_VERSION
961 && !(options & SSL_OP_NO_DTLSv1))
962 s->method = DTLSv1_client_method();
965 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
966 s->version = hversion;
967 al = SSL_AD_PROTOCOL_VERSION;
970 s->version = s->client_version = s->method->version;
973 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
975 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
976 s->version=(s->version&0xff00)|p[1];
977 al=SSL_AD_PROTOCOL_VERSION;
982 /* load the server hello data */
983 /* load the server random */
984 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
987 /* get the session-id */
990 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
992 al=SSL_AD_ILLEGAL_PARAMETER;
993 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
997 #ifndef OPENSSL_NO_TLSEXT
998 /* check if we want to resume the session based on external pre-shared secret */
999 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1001 SSL_CIPHER *pref_cipher=NULL;
1002 s->session->master_key_length=sizeof(s->session->master_key);
1003 if (s->tls_session_secret_cb(s, s->session->master_key,
1004 &s->session->master_key_length,
1006 s->tls_session_secret_cb_arg))
1008 s->session->cipher = pref_cipher ?
1009 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1010 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1013 #endif /* OPENSSL_NO_TLSEXT */
1015 if (j != 0 && j == s->session->session_id_length
1016 && memcmp(p,s->session->session_id,j) == 0)
1018 if(s->sid_ctx_length != s->session->sid_ctx_length
1019 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1021 /* actually a client application bug */
1022 al=SSL_AD_ILLEGAL_PARAMETER;
1023 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1026 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1029 else /* a miss or crap from the other end */
1031 /* If we were trying for session-id reuse, make a new
1032 * SSL_SESSION so we don't stuff up other people */
1034 if (s->session->session_id_length > 0)
1036 if (!ssl_get_new_session(s,0))
1041 s->session->session_id_length=j;
1042 memcpy(s->session->session_id,p,j); /* j could be 0 */
1045 c=ssl_get_cipher_by_char(s,p);
1048 /* unknown cipher */
1049 al=SSL_AD_ILLEGAL_PARAMETER;
1050 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1053 /* Set version disabled mask now we know version */
1054 if (!SSL_USE_TLS1_2_CIPHERS(s))
1055 ct->mask_ssl = SSL_TLSV1_2;
1058 /* If it is a disabled cipher we didn't send it in client hello,
1059 * so return an error.
1061 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK))
1063 al=SSL_AD_ILLEGAL_PARAMETER;
1064 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1067 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1069 sk=ssl_get_ciphers_by_id(s);
1070 i=sk_SSL_CIPHER_find(sk,c);
1073 /* we did not say we would use this cipher */
1074 al=SSL_AD_ILLEGAL_PARAMETER;
1075 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1079 /* Depending on the session caching (internal/external), the cipher
1080 and/or cipher_id values may not be set. Make sure that
1081 cipher_id is set and use it for comparison. */
1082 if (s->session->cipher)
1083 s->session->cipher_id = s->session->cipher->id;
1084 if (s->hit && (s->session->cipher_id != c->id))
1086 /* Workaround is now obsolete */
1089 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1092 al=SSL_AD_ILLEGAL_PARAMETER;
1093 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1097 s->s3->tmp.new_cipher=c;
1098 /* Don't digest cached records if no sigalgs: we may need them for
1099 * client authentication.
1101 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1103 /* lets get the compression algorithm */
1105 #ifdef OPENSSL_NO_COMP
1108 al=SSL_AD_ILLEGAL_PARAMETER;
1109 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1112 /* If compression is disabled we'd better not try to resume a session
1113 * using compression.
1115 if (s->session->compress_meth != 0)
1117 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1122 if (s->hit && j != s->session->compress_meth)
1124 al=SSL_AD_ILLEGAL_PARAMETER;
1125 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1130 else if (!ssl_allow_compression(s))
1132 al=SSL_AD_ILLEGAL_PARAMETER;
1133 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1137 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1139 if ((j != 0) && (comp == NULL))
1141 al=SSL_AD_ILLEGAL_PARAMETER;
1142 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1147 s->s3->tmp.new_compression=comp;
1151 #ifndef OPENSSL_NO_TLSEXT
1153 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1155 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1162 /* wrong packet length */
1163 al=SSL_AD_DECODE_ERROR;
1164 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1170 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1175 int ssl3_get_server_certificate(SSL *s)
1177 int al,i,ok,ret= -1;
1178 unsigned long n,nc,llen,l;
1180 const unsigned char *q,*p;
1182 STACK_OF(X509) *sk=NULL;
1184 EVP_PKEY *pkey=NULL;
1185 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1187 n=s->method->ssl_get_message(s,
1194 if (!ok) return((int)n);
1196 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1197 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1198 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1200 s->s3->tmp.reuse_message=1;
1204 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1206 al=SSL_AD_UNEXPECTED_MESSAGE;
1207 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1210 p=d=(unsigned char *)s->init_msg;
1212 if ((sk=sk_X509_new_null()) == NULL)
1214 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1221 al=SSL_AD_DECODE_ERROR;
1222 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1225 for (nc=0; nc<llen; )
1228 if ((l+nc+3) > llen)
1230 al=SSL_AD_DECODE_ERROR;
1231 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1236 x=d2i_X509(NULL,&q,l);
1239 al=SSL_AD_BAD_CERTIFICATE;
1240 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1245 al=SSL_AD_DECODE_ERROR;
1246 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1249 if (!sk_X509_push(sk,x))
1251 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1259 i=ssl_verify_cert_chain(s,sk);
1260 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1261 #ifndef OPENSSL_NO_KRB5
1262 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1263 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1264 #endif /* OPENSSL_NO_KRB5 */
1267 al=ssl_verify_alarm_type(s->verify_result);
1268 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1271 ERR_clear_error(); /* but we keep s->verify_result */
1274 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1275 al = SSL_AD_HANDSHAKE_FAILURE;
1279 sc=ssl_sess_cert_new();
1280 if (sc == NULL) goto err;
1282 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1283 s->session->sess_cert=sc;
1286 /* Inconsistency alert: cert_chain does include the peer's
1287 * certificate, which we don't include in s3_srvr.c */
1288 x=sk_X509_value(sk,0);
1290 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1292 pkey=X509_get_pubkey(x);
1294 /* VRS: allow null cert if auth == KRB5 */
1295 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1296 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1300 printf("pkey,x = %p, %p\n", pkey,x);
1301 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1302 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1303 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1304 #endif /* KSSL_DEBUG */
1306 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1310 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1311 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1315 i=ssl_cert_type(x,pkey);
1316 if (need_cert && i < 0)
1320 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1321 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1327 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1328 if (exp_idx >= 0 && i != exp_idx)
1331 al=SSL_AD_ILLEGAL_PARAMETER;
1332 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1333 SSL_R_WRONG_CERTIFICATE_TYPE);
1336 sc->peer_cert_type=i;
1337 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1338 /* Why would the following ever happen?
1339 * We just created sc a couple of lines ago. */
1340 if (sc->peer_pkeys[i].x509 != NULL)
1341 X509_free(sc->peer_pkeys[i].x509);
1342 sc->peer_pkeys[i].x509=x;
1343 sc->peer_key= &(sc->peer_pkeys[i]);
1345 if (s->session->peer != NULL)
1346 X509_free(s->session->peer);
1347 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1352 sc->peer_cert_type=i;
1355 if (s->session->peer != NULL)
1356 X509_free(s->session->peer);
1357 s->session->peer=NULL;
1359 s->session->verify_result = s->verify_result;
1366 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1369 EVP_PKEY_free(pkey);
1371 sk_X509_pop_free(sk,X509_free);
1375 int ssl3_get_key_exchange(SSL *s)
1377 #ifndef OPENSSL_NO_RSA
1378 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1381 unsigned char *param,*p;
1383 long i,param_len,n,alg_k,alg_a;
1384 EVP_PKEY *pkey=NULL;
1385 const EVP_MD *md = NULL;
1386 #ifndef OPENSSL_NO_RSA
1389 #ifndef OPENSSL_NO_DH
1392 #ifndef OPENSSL_NO_ECDH
1393 EC_KEY *ecdh = NULL;
1394 BN_CTX *bn_ctx = NULL;
1395 EC_POINT *srvr_ecpoint = NULL;
1397 int encoded_pt_len = 0;
1400 /* use same message size as in ssl3_get_certificate_request()
1401 * as ServerKeyExchange message may be skipped */
1402 n=s->method->ssl_get_message(s,
1403 SSL3_ST_CR_KEY_EXCH_A,
1404 SSL3_ST_CR_KEY_EXCH_B,
1408 if (!ok) return((int)n);
1410 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1412 #ifndef OPENSSL_NO_PSK
1413 /* In plain PSK ciphersuite, ServerKeyExchange can be
1414 omitted if no identity hint is sent. Set
1415 session->sess_cert anyway to avoid problems
1417 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1419 s->session->sess_cert=ssl_sess_cert_new();
1420 if (s->ctx->psk_identity_hint)
1421 OPENSSL_free(s->ctx->psk_identity_hint);
1422 s->ctx->psk_identity_hint = NULL;
1425 s->s3->tmp.reuse_message=1;
1429 param=p=(unsigned char *)s->init_msg;
1430 if (s->session->sess_cert != NULL)
1432 #ifndef OPENSSL_NO_RSA
1433 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1435 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1436 s->session->sess_cert->peer_rsa_tmp=NULL;
1439 #ifndef OPENSSL_NO_DH
1440 if (s->session->sess_cert->peer_dh_tmp)
1442 DH_free(s->session->sess_cert->peer_dh_tmp);
1443 s->session->sess_cert->peer_dh_tmp=NULL;
1446 #ifndef OPENSSL_NO_ECDH
1447 if (s->session->sess_cert->peer_ecdh_tmp)
1449 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1450 s->session->sess_cert->peer_ecdh_tmp=NULL;
1456 s->session->sess_cert=ssl_sess_cert_new();
1459 /* Total length of the parameters including the length prefix */
1462 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1463 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1464 EVP_MD_CTX_init(&md_ctx);
1466 al=SSL_AD_DECODE_ERROR;
1468 #ifndef OPENSSL_NO_PSK
1469 if (alg_k & SSL_kPSK)
1471 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1476 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1477 SSL_R_LENGTH_TOO_SHORT);
1482 /* Store PSK identity hint for later use, hint is used
1483 * in ssl3_send_client_key_exchange. Assume that the
1484 * maximum length of a PSK identity hint can be as
1485 * long as the maximum length of a PSK identity. */
1486 if (i > PSK_MAX_IDENTITY_LEN)
1488 al=SSL_AD_HANDSHAKE_FAILURE;
1489 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1490 SSL_R_DATA_LENGTH_TOO_LONG);
1493 if (i > n - param_len)
1495 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1496 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1501 /* If received PSK identity hint contains NULL
1502 * characters, the hint is truncated from the first
1503 * NULL. p may not be ending with NULL, so create a
1504 * NULL-terminated string. */
1505 memcpy(tmp_id_hint, p, i);
1506 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1507 if (s->ctx->psk_identity_hint != NULL)
1508 OPENSSL_free(s->ctx->psk_identity_hint);
1509 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1510 if (s->ctx->psk_identity_hint == NULL)
1512 al=SSL_AD_HANDSHAKE_FAILURE;
1513 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1521 #endif /* !OPENSSL_NO_PSK */
1522 #ifndef OPENSSL_NO_SRP
1523 if (alg_k & SSL_kSRP)
1528 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1529 SSL_R_LENGTH_TOO_SHORT);
1534 if (i > n - param_len)
1536 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1541 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1543 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1549 if (2 > n - param_len)
1551 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1552 SSL_R_LENGTH_TOO_SHORT);
1559 if (i > n - param_len)
1561 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1566 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1568 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1574 if (1 > n - param_len)
1576 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1577 SSL_R_LENGTH_TOO_SHORT);
1582 i = (unsigned int)(p[0]);
1585 if (i > n - param_len)
1587 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1592 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1594 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1599 if (2 > n - param_len)
1601 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1602 SSL_R_LENGTH_TOO_SHORT);
1609 if (i > n - param_len)
1611 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1616 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1618 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1624 if (!srp_verify_server_param(s, &al))
1626 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1630 /* We must check if there is a certificate */
1631 #ifndef OPENSSL_NO_RSA
1632 if (alg_a & SSL_aRSA)
1633 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1638 #ifndef OPENSSL_NO_DSA
1639 else if (alg_a & SSL_aDSS)
1640 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1644 #endif /* !OPENSSL_NO_SRP */
1645 #ifndef OPENSSL_NO_RSA
1646 if (alg_k & SSL_kRSA)
1648 if ((rsa=RSA_new()) == NULL)
1650 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1657 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1658 SSL_R_LENGTH_TOO_SHORT);
1663 if (i > n - param_len)
1665 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1670 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1672 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1677 if (2 > n - param_len)
1679 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1680 SSL_R_LENGTH_TOO_SHORT);
1687 if (i > n - param_len)
1689 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1694 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1696 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1702 /* this should be because we are using an export cipher */
1703 if (alg_a & SSL_aRSA)
1704 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1707 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1710 s->session->sess_cert->peer_rsa_tmp=rsa;
1713 #else /* OPENSSL_NO_RSA */
1717 #ifndef OPENSSL_NO_DH
1718 else if (alg_k & SSL_kDHE)
1720 if ((dh=DH_new()) == NULL)
1722 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1729 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1730 SSL_R_LENGTH_TOO_SHORT);
1735 if (i > n - param_len)
1737 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1742 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1744 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1749 if (2 > n - param_len)
1751 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1752 SSL_R_LENGTH_TOO_SHORT);
1759 if (i > n - param_len)
1761 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1766 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1768 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1773 if (2 > n - param_len)
1775 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1776 SSL_R_LENGTH_TOO_SHORT);
1783 if (i > n - param_len)
1785 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1790 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1792 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1798 if (!ssl_security(s, SSL_SECOP_TMP_DH,
1799 DH_security_bits(dh), 0, dh))
1801 al=SSL_AD_HANDSHAKE_FAILURE;
1802 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL);
1806 #ifndef OPENSSL_NO_RSA
1807 if (alg_a & SSL_aRSA)
1808 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1813 #ifndef OPENSSL_NO_DSA
1814 else if (alg_a & SSL_aDSS)
1815 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1817 /* else anonymous DH, so no certificate or pkey. */
1819 s->session->sess_cert->peer_dh_tmp=dh;
1822 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1824 al=SSL_AD_ILLEGAL_PARAMETER;
1825 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1828 #endif /* !OPENSSL_NO_DH */
1830 #ifndef OPENSSL_NO_ECDH
1831 else if (alg_k & SSL_kECDHE)
1834 const EC_GROUP *group;
1836 if ((ecdh=EC_KEY_new()) == NULL)
1838 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1842 /* Extract elliptic curve parameters and the
1843 * server's ephemeral ECDH public key.
1844 * Keep accumulating lengths of various components in
1845 * param_len and make sure it never exceeds n.
1848 /* XXX: For now we only support named (not generic) curves
1849 * and the ECParameters in this case is just three bytes. We
1850 * also need one byte for the length of the encoded point
1855 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1856 SSL_R_LENGTH_TOO_SHORT);
1859 /* Check curve is one of our preferences, if not server has
1860 * sent an invalid curve. ECParameters is 3 bytes.
1862 if (!tls1_check_curve(s, p, 3))
1864 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1868 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1870 al=SSL_AD_INTERNAL_ERROR;
1871 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1875 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1878 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1881 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1883 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1886 EC_GROUP_free(ngroup);
1888 group = EC_KEY_get0_group(ecdh);
1890 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1891 (EC_GROUP_get_degree(group) > 163))
1893 al=SSL_AD_EXPORT_RESTRICTION;
1894 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1900 /* Next, get the encoded ECPoint */
1901 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1902 ((bn_ctx = BN_CTX_new()) == NULL))
1904 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1908 encoded_pt_len = *p; /* length of encoded point */
1911 if ((encoded_pt_len > n - param_len) ||
1912 (EC_POINT_oct2point(group, srvr_ecpoint,
1913 p, encoded_pt_len, bn_ctx) == 0))
1915 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1918 param_len += encoded_pt_len;
1923 /* The ECC/TLS specification does not mention
1924 * the use of DSA to sign ECParameters in the server
1925 * key exchange message. We do support RSA and ECDSA.
1928 #ifndef OPENSSL_NO_RSA
1929 else if (alg_a & SSL_aRSA)
1930 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1932 #ifndef OPENSSL_NO_ECDSA
1933 else if (alg_a & SSL_aECDSA)
1934 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1936 /* else anonymous ECDH, so no certificate or pkey. */
1937 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1938 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1940 BN_CTX_free(bn_ctx);
1942 EC_POINT_free(srvr_ecpoint);
1943 srvr_ecpoint = NULL;
1947 al=SSL_AD_UNEXPECTED_MESSAGE;
1948 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1951 #endif /* !OPENSSL_NO_ECDH */
1954 /* p points to the next byte, there are 'n' bytes left */
1956 /* if it was signed, check the signature */
1959 if (SSL_USE_SIGALGS(s))
1964 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1965 SSL_R_LENGTH_TOO_SHORT);
1968 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1976 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1986 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1987 SSL_R_LENGTH_TOO_SHORT);
1992 j=EVP_PKEY_size(pkey);
1994 /* Check signature length. If n is 0 then signature is empty */
1995 if ((i != n) || (n > j) || (n <= 0))
1997 /* wrong packet length */
1998 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
2002 #ifndef OPENSSL_NO_RSA
2003 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
2010 for (num=2; num > 0; num--)
2012 EVP_MD_CTX_set_flags(&md_ctx,
2013 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
2014 EVP_DigestInit_ex(&md_ctx,(num == 2)
2015 ?s->ctx->md5:s->ctx->sha1, NULL);
2016 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2017 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2018 EVP_DigestUpdate(&md_ctx,param,param_len);
2019 EVP_DigestFinal_ex(&md_ctx,q,&size);
2023 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
2027 al=SSL_AD_DECRYPT_ERROR;
2028 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
2034 al=SSL_AD_DECRYPT_ERROR;
2035 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2042 EVP_VerifyInit_ex(&md_ctx, md, NULL);
2043 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2044 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2045 EVP_VerifyUpdate(&md_ctx,param,param_len);
2046 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
2049 al=SSL_AD_DECRYPT_ERROR;
2050 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2057 /* aNULL, aSRP or kPSK do not need public keys */
2058 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
2060 /* Might be wrong key type, check it */
2061 if (ssl3_check_cert_and_algorithm(s))
2062 /* Otherwise this shouldn't happen */
2063 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2066 /* still data left over */
2069 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
2073 EVP_PKEY_free(pkey);
2074 EVP_MD_CTX_cleanup(&md_ctx);
2077 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2079 EVP_PKEY_free(pkey);
2080 #ifndef OPENSSL_NO_RSA
2084 #ifndef OPENSSL_NO_DH
2088 #ifndef OPENSSL_NO_ECDH
2089 BN_CTX_free(bn_ctx);
2090 EC_POINT_free(srvr_ecpoint);
2094 EVP_MD_CTX_cleanup(&md_ctx);
2098 int ssl3_get_certificate_request(SSL *s)
2101 unsigned long n,nc,l;
2102 unsigned int llen, ctype_num,i;
2104 const unsigned char *p,*q;
2106 STACK_OF(X509_NAME) *ca_sk=NULL;
2108 n=s->method->ssl_get_message(s,
2109 SSL3_ST_CR_CERT_REQ_A,
2110 SSL3_ST_CR_CERT_REQ_B,
2115 if (!ok) return((int)n);
2117 s->s3->tmp.cert_req=0;
2119 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2121 s->s3->tmp.reuse_message=1;
2122 /* If we get here we don't need any cached handshake records
2123 * as we wont be doing client auth.
2125 if (s->s3->handshake_buffer)
2127 if (!ssl3_digest_cached_records(s))
2133 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2135 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2136 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2140 /* TLS does not like anon-DH with client cert */
2141 if (s->version > SSL3_VERSION)
2143 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2145 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2146 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2151 p=d=(unsigned char *)s->init_msg;
2153 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2155 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2159 /* get the certificate types */
2161 if (s->cert->ctypes)
2163 OPENSSL_free(s->cert->ctypes);
2164 s->cert->ctypes = NULL;
2166 if (ctype_num > SSL3_CT_NUMBER)
2168 /* If we exceed static buffer copy all to cert structure */
2169 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2170 memcpy(s->cert->ctypes, p, ctype_num);
2171 s->cert->ctype_num = (size_t)ctype_num;
2172 ctype_num=SSL3_CT_NUMBER;
2174 for (i=0; i<ctype_num; i++)
2175 s->s3->tmp.ctype[i]= p[i];
2177 if (SSL_USE_SIGALGS(s))
2180 /* Check we have enough room for signature algorithms and
2181 * following length value.
2183 if ((unsigned long)(p - d + llen + 2) > n)
2185 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2186 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2189 /* Clear certificate digests and validity flags */
2190 for (i = 0; i < SSL_PKEY_NUM; i++)
2192 s->cert->pkeys[i].digest = NULL;
2193 s->cert->pkeys[i].valid_flags = 0;
2195 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen))
2197 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2198 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2201 if (!tls1_process_sigalgs(s))
2203 ssl3_send_alert(s,SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2204 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2210 /* get the CA RDNs */
2215 out=fopen("/tmp/vsign.der","w");
2216 fwrite(p,1,llen,out);
2221 if ((unsigned long)(p - d + llen) != n)
2223 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2224 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2228 for (nc=0; nc<llen; )
2231 if ((l+nc+2) > llen)
2233 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2234 goto cont; /* netscape bugs */
2235 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2236 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2242 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2244 /* If netscape tolerance is on, ignore errors */
2245 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2249 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2250 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2257 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2258 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2261 if (!sk_X509_NAME_push(ca_sk,xn))
2263 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2277 /* we should setup a certificate to return.... */
2278 s->s3->tmp.cert_req=1;
2279 s->s3->tmp.ctype_num=ctype_num;
2280 if (s->s3->tmp.ca_names != NULL)
2281 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2282 s->s3->tmp.ca_names=ca_sk;
2287 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2291 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2293 return(X509_NAME_cmp(*a,*b));
2295 #ifndef OPENSSL_NO_TLSEXT
2296 int ssl3_get_new_session_ticket(SSL *s)
2298 int ok,al,ret=0, ticklen;
2300 const unsigned char *p;
2303 n=s->method->ssl_get_message(s,
2304 SSL3_ST_CR_SESSION_TICKET_A,
2305 SSL3_ST_CR_SESSION_TICKET_B,
2313 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2315 s->s3->tmp.reuse_message=1;
2318 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2320 al=SSL_AD_UNEXPECTED_MESSAGE;
2321 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2326 /* need at least ticket_lifetime_hint + ticket length */
2327 al = SSL_AD_DECODE_ERROR;
2328 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2332 p=d=(unsigned char *)s->init_msg;
2333 n2l(p, s->session->tlsext_tick_lifetime_hint);
2335 /* ticket_lifetime_hint + ticket_length + ticket */
2336 if (ticklen + 6 != n)
2338 al = SSL_AD_DECODE_ERROR;
2339 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2342 if (s->session->tlsext_tick)
2344 OPENSSL_free(s->session->tlsext_tick);
2345 s->session->tlsext_ticklen = 0;
2347 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2348 if (!s->session->tlsext_tick)
2350 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2353 memcpy(s->session->tlsext_tick, p, ticklen);
2354 s->session->tlsext_ticklen = ticklen;
2355 /* There are two ways to detect a resumed ticket session.
2356 * One is to set an appropriate session ID and then the server
2357 * must return a match in ServerHello. This allows the normal
2358 * client session ID matching to work and we know much
2359 * earlier that the ticket has been accepted.
2361 * The other way is to set zero length session ID when the
2362 * ticket is presented and rely on the handshake to determine
2363 * session resumption.
2365 * We choose the former approach because this fits in with
2366 * assumptions elsewhere in OpenSSL. The session ID is set
2367 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2370 EVP_Digest(p, ticklen,
2371 s->session->session_id, &s->session->session_id_length,
2372 #ifndef OPENSSL_NO_SHA256
2373 EVP_sha256(), NULL);
2380 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2385 int ssl3_get_cert_status(SSL *s)
2388 unsigned long resplen,n;
2389 const unsigned char *p;
2391 n=s->method->ssl_get_message(s,
2392 SSL3_ST_CR_CERT_STATUS_A,
2393 SSL3_ST_CR_CERT_STATUS_B,
2394 SSL3_MT_CERTIFICATE_STATUS,
2398 if (!ok) return((int)n);
2401 /* need at least status type + length */
2402 al = SSL_AD_DECODE_ERROR;
2403 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2406 p = (unsigned char *)s->init_msg;
2407 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2409 al = SSL_AD_DECODE_ERROR;
2410 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2414 if (resplen + 4 != n)
2416 al = SSL_AD_DECODE_ERROR;
2417 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2420 if (s->tlsext_ocsp_resp)
2421 OPENSSL_free(s->tlsext_ocsp_resp);
2422 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2423 if (!s->tlsext_ocsp_resp)
2425 al = SSL_AD_INTERNAL_ERROR;
2426 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2429 s->tlsext_ocsp_resplen = resplen;
2430 if (s->ctx->tlsext_status_cb)
2433 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2436 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2437 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2442 al = SSL_AD_INTERNAL_ERROR;
2443 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2449 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2454 int ssl3_get_server_done(SSL *s)
2459 n=s->method->ssl_get_message(s,
2460 SSL3_ST_CR_SRVR_DONE_A,
2461 SSL3_ST_CR_SRVR_DONE_B,
2462 SSL3_MT_SERVER_DONE,
2463 30, /* should be very small, like 0 :-) */
2466 if (!ok) return((int)n);
2469 /* should contain no data */
2470 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2471 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2479 int ssl3_send_client_key_exchange(SSL *s)
2483 unsigned long alg_k;
2484 #ifndef OPENSSL_NO_RSA
2486 EVP_PKEY *pkey=NULL;
2488 #ifndef OPENSSL_NO_KRB5
2490 #endif /* OPENSSL_NO_KRB5 */
2491 #ifndef OPENSSL_NO_ECDH
2492 EC_KEY *clnt_ecdh = NULL;
2493 const EC_POINT *srvr_ecpoint = NULL;
2494 EVP_PKEY *srvr_pub_pkey = NULL;
2495 unsigned char *encodedPoint = NULL;
2496 int encoded_pt_len = 0;
2497 BN_CTX * bn_ctx = NULL;
2500 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2502 p = ssl_handshake_start(s);
2504 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2506 /* Fool emacs indentation */
2508 #ifndef OPENSSL_NO_RSA
2509 else if (alg_k & SSL_kRSA)
2512 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2514 if (s->session->sess_cert == NULL)
2516 /* We should always have a server certificate with SSL_kRSA. */
2517 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2521 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2522 rsa=s->session->sess_cert->peer_rsa_tmp;
2525 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2526 if ((pkey == NULL) ||
2527 (pkey->type != EVP_PKEY_RSA) ||
2528 (pkey->pkey.rsa == NULL))
2530 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2534 EVP_PKEY_free(pkey);
2537 tmp_buf[0]=s->client_version>>8;
2538 tmp_buf[1]=s->client_version&0xff;
2539 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2542 s->session->master_key_length=sizeof tmp_buf;
2545 /* Fix buf for TLS and beyond */
2546 if (s->version > SSL3_VERSION)
2548 n=RSA_public_encrypt(sizeof tmp_buf,
2549 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2551 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2552 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2556 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2560 /* Fix buf for TLS and beyond */
2561 if (s->version > SSL3_VERSION)
2567 s->session->master_key_length=
2568 s->method->ssl3_enc->generate_master_secret(s,
2569 s->session->master_key,
2570 tmp_buf,sizeof tmp_buf);
2571 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2574 #ifndef OPENSSL_NO_KRB5
2575 else if (alg_k & SSL_kKRB5)
2577 krb5_error_code krb5rc;
2578 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2579 /* krb5_data krb5_ap_req; */
2580 krb5_data *enc_ticket;
2581 krb5_data authenticator, *authp = NULL;
2582 EVP_CIPHER_CTX ciph_ctx;
2583 const EVP_CIPHER *enc = NULL;
2584 unsigned char iv[EVP_MAX_IV_LENGTH];
2585 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2586 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2587 + EVP_MAX_IV_LENGTH];
2588 int padl, outl = sizeof(epms);
2590 EVP_CIPHER_CTX_init(&ciph_ctx);
2593 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2595 #endif /* KSSL_DEBUG */
2599 if (KRB5SENDAUTH) authp = &authenticator;
2600 #endif /* KRB5SENDAUTH */
2602 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2604 enc = kssl_map_enc(kssl_ctx->enctype);
2609 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2610 if (krb5rc && kssl_err.text)
2611 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2613 #endif /* KSSL_DEBUG */
2617 ssl3_send_alert(s,SSL3_AL_FATAL,
2618 SSL_AD_HANDSHAKE_FAILURE);
2619 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2624 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2625 ** in place of RFC 2712 KerberosWrapper, as in:
2627 ** Send ticket (copy to *p, set n = length)
2628 ** n = krb5_ap_req.length;
2629 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2630 ** if (krb5_ap_req.data)
2631 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2633 ** Now using real RFC 2712 KerberosWrapper
2634 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2635 ** Note: 2712 "opaque" types are here replaced
2636 ** with a 2-byte length followed by the value.
2638 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2639 ** Where "xx xx" = length bytes. Shown here with
2640 ** optional authenticator omitted.
2643 /* KerberosWrapper.Ticket */
2644 s2n(enc_ticket->length,p);
2645 memcpy(p, enc_ticket->data, enc_ticket->length);
2646 p+= enc_ticket->length;
2647 n = enc_ticket->length + 2;
2649 /* KerberosWrapper.Authenticator */
2650 if (authp && authp->length)
2652 s2n(authp->length,p);
2653 memcpy(p, authp->data, authp->length);
2655 n+= authp->length + 2;
2663 s2n(0,p);/* null authenticator length */
2667 tmp_buf[0]=s->client_version>>8;
2668 tmp_buf[1]=s->client_version&0xff;
2669 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2672 /* 20010420 VRS. Tried it this way; failed.
2673 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2674 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2675 ** kssl_ctx->length);
2676 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2679 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2680 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2682 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2684 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2686 if (outl > (int)sizeof epms)
2688 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2691 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2693 /* KerberosWrapper.EncryptedPreMasterSecret */
2695 memcpy(p, epms, outl);
2699 s->session->master_key_length=
2700 s->method->ssl3_enc->generate_master_secret(s,
2701 s->session->master_key,
2702 tmp_buf, sizeof tmp_buf);
2704 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2705 OPENSSL_cleanse(epms, outl);
2708 #ifndef OPENSSL_NO_DH
2709 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2711 DH *dh_srvr,*dh_clnt;
2712 SESS_CERT *scert = s->session->sess_cert;
2716 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2717 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2721 if (scert->peer_dh_tmp != NULL)
2722 dh_srvr=scert->peer_dh_tmp;
2725 /* we get them from the cert */
2726 int idx = scert->peer_cert_type;
2727 EVP_PKEY *spkey = NULL;
2730 spkey = X509_get_pubkey(
2731 scert->peer_pkeys[idx].x509);
2734 dh_srvr = EVP_PKEY_get1_DH(spkey);
2735 EVP_PKEY_free(spkey);
2737 if (dh_srvr == NULL)
2739 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2740 ERR_R_INTERNAL_ERROR);
2744 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2746 /* Use client certificate key */
2747 EVP_PKEY *clkey = s->cert->key->privatekey;
2750 dh_clnt = EVP_PKEY_get1_DH(clkey);
2751 if (dh_clnt == NULL)
2753 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2754 ERR_R_INTERNAL_ERROR);
2760 /* generate a new random key */
2761 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2763 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2766 if (!DH_generate_key(dh_clnt))
2768 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2774 /* use the 'p' output buffer for the DH key, but
2775 * make sure to clear it out afterwards */
2777 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2778 if (scert->peer_dh_tmp == NULL)
2783 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2788 /* generate master key from the result */
2789 s->session->master_key_length=
2790 s->method->ssl3_enc->generate_master_secret(s,
2791 s->session->master_key,p,n);
2795 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2799 /* send off the data */
2800 n=BN_num_bytes(dh_clnt->pub_key);
2802 BN_bn2bin(dh_clnt->pub_key,p);
2808 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2812 #ifndef OPENSSL_NO_ECDH
2813 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2815 const EC_GROUP *srvr_group = NULL;
2817 int ecdh_clnt_cert = 0;
2820 if (s->session->sess_cert == NULL)
2822 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2823 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2827 /* Did we send out the client's
2828 * ECDH share for use in premaster
2829 * computation as part of client certificate?
2830 * If so, set ecdh_clnt_cert to 1.
2832 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2834 /* XXX: For now, we do not support client
2835 * authentication using ECDH certificates.
2836 * To add such support, one needs to add
2837 * code that checks for appropriate
2838 * conditions and sets ecdh_clnt_cert to 1.
2839 * For example, the cert have an ECC
2840 * key on the same curve as the server's
2841 * and the key should be authorized for
2844 * One also needs to add code in ssl3_connect
2845 * to skip sending the certificate verify
2848 * if ((s->cert->key->privatekey != NULL) &&
2849 * (s->cert->key->privatekey->type ==
2850 * EVP_PKEY_EC) && ...)
2851 * ecdh_clnt_cert = 1;
2855 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2857 tkey = s->session->sess_cert->peer_ecdh_tmp;
2861 /* Get the Server Public Key from Cert */
2862 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2863 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2864 if ((srvr_pub_pkey == NULL) ||
2865 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2866 (srvr_pub_pkey->pkey.ec == NULL))
2868 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2869 ERR_R_INTERNAL_ERROR);
2873 tkey = srvr_pub_pkey->pkey.ec;
2876 srvr_group = EC_KEY_get0_group(tkey);
2877 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2879 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2881 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2882 ERR_R_INTERNAL_ERROR);
2886 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2888 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2892 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2894 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2899 /* Reuse key info from our certificate
2900 * We only need our private key to perform
2901 * the ECDH computation.
2903 const BIGNUM *priv_key;
2904 tkey = s->cert->key->privatekey->pkey.ec;
2905 priv_key = EC_KEY_get0_private_key(tkey);
2906 if (priv_key == NULL)
2908 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2911 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2913 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2919 /* Generate a new ECDH key pair */
2920 if (!(EC_KEY_generate_key(clnt_ecdh)))
2922 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2927 /* use the 'p' output buffer for the ECDH key, but
2928 * make sure to clear it out afterwards
2931 field_size = EC_GROUP_get_degree(srvr_group);
2932 if (field_size <= 0)
2934 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2938 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2941 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2946 /* generate master key from the result */
2947 s->session->master_key_length = s->method->ssl3_enc \
2948 -> generate_master_secret(s,
2949 s->session->master_key,
2952 memset(p, 0, n); /* clean up */
2956 /* Send empty client key exch message */
2961 /* First check the size of encoding and
2962 * allocate memory accordingly.
2965 EC_POINT_point2oct(srvr_group,
2966 EC_KEY_get0_public_key(clnt_ecdh),
2967 POINT_CONVERSION_UNCOMPRESSED,
2970 encodedPoint = (unsigned char *)
2971 OPENSSL_malloc(encoded_pt_len *
2972 sizeof(unsigned char));
2973 bn_ctx = BN_CTX_new();
2974 if ((encodedPoint == NULL) ||
2977 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2981 /* Encode the public key */
2982 n = EC_POINT_point2oct(srvr_group,
2983 EC_KEY_get0_public_key(clnt_ecdh),
2984 POINT_CONVERSION_UNCOMPRESSED,
2985 encodedPoint, encoded_pt_len, bn_ctx);
2987 *p = n; /* length of encoded point */
2988 /* Encoded point will be copied here */
2990 /* copy the point */
2991 memcpy((unsigned char *)p, encodedPoint, n);
2992 /* increment n to account for length field */
2996 /* Free allocated memory */
2997 BN_CTX_free(bn_ctx);
2998 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2999 if (clnt_ecdh != NULL)
3000 EC_KEY_free(clnt_ecdh);
3001 EVP_PKEY_free(srvr_pub_pkey);
3003 #endif /* !OPENSSL_NO_ECDH */
3004 else if (alg_k & SSL_kGOST)
3006 /* GOST key exchange message creation */
3007 EVP_PKEY_CTX *pkey_ctx;
3010 unsigned int md_len;
3012 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
3013 EVP_MD_CTX *ukm_hash;
3016 /* Get server sertificate PKEY and create ctx from it */
3017 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
3019 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
3021 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
3025 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
3026 /* If we have send a certificate, and certificate key
3028 * parameters match those of server certificate, use
3029 * certificate key for key exchange
3032 /* Otherwise, generate ephemeral key pair */
3034 EVP_PKEY_encrypt_init(pkey_ctx);
3035 /* Generate session key */
3036 RAND_bytes(premaster_secret,32);
3037 /* If we have client certificate, use its secret as peer key */
3038 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
3039 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
3040 /* If there was an error - just ignore it. Ephemeral key
3046 /* Compute shared IV and store it in algorithm-specific
3048 ukm_hash = EVP_MD_CTX_create();
3049 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
3050 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
3051 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
3052 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
3053 EVP_MD_CTX_destroy(ukm_hash);
3054 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
3056 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3060 /* Make GOST keytransport blob message */
3061 /*Encapsulate it into sequence */
3062 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
3064 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
3065 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3072 *(p++)= msglen & 0xff;
3077 *(p++)= msglen & 0xff;
3080 memcpy(p, tmp, msglen);
3081 /* Check if pubkey from client certificate was used */
3082 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
3084 /* Set flag "skip certificate verify" */
3085 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3087 EVP_PKEY_CTX_free(pkey_ctx);
3088 s->session->master_key_length=
3089 s->method->ssl3_enc->generate_master_secret(s,
3090 s->session->master_key,premaster_secret,32);
3091 EVP_PKEY_free(pub_key);
3094 #ifndef OPENSSL_NO_SRP
3095 else if (alg_k & SSL_kSRP)
3097 if (s->srp_ctx.A != NULL)
3099 /* send off the data */
3100 n=BN_num_bytes(s->srp_ctx.A);
3102 BN_bn2bin(s->srp_ctx.A,p);
3107 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3110 if (s->session->srp_username != NULL)
3111 OPENSSL_free(s->session->srp_username);
3112 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3113 if (s->session->srp_username == NULL)
3115 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3116 ERR_R_MALLOC_FAILURE);
3120 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3122 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3127 #ifndef OPENSSL_NO_PSK
3128 else if (alg_k & SSL_kPSK)
3130 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes
3131 * to return a \0-terminated identity. The last byte
3132 * is for us for simulating strnlen. */
3133 char identity[PSK_MAX_IDENTITY_LEN + 2];
3134 size_t identity_len;
3135 unsigned char *t = NULL;
3136 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3137 unsigned int pre_ms_len = 0, psk_len = 0;
3141 if (s->psk_client_callback == NULL)
3143 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3144 SSL_R_PSK_NO_CLIENT_CB);
3148 memset(identity, 0, sizeof(identity));
3149 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3150 identity, sizeof(identity) - 1,
3151 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3152 if (psk_len > PSK_MAX_PSK_LEN)
3154 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3155 ERR_R_INTERNAL_ERROR);
3158 else if (psk_len == 0)
3160 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3161 SSL_R_PSK_IDENTITY_NOT_FOUND);
3164 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
3165 identity_len = strlen(identity);
3166 if (identity_len > PSK_MAX_IDENTITY_LEN)
3168 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3169 ERR_R_INTERNAL_ERROR);
3172 /* create PSK pre_master_secret */
3173 pre_ms_len = 2+psk_len+2+psk_len;
3175 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3177 memset(t, 0, psk_len);
3181 if (s->session->psk_identity_hint != NULL)
3182 OPENSSL_free(s->session->psk_identity_hint);
3183 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3184 if (s->ctx->psk_identity_hint != NULL &&
3185 s->session->psk_identity_hint == NULL)
3187 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3188 ERR_R_MALLOC_FAILURE);
3192 if (s->session->psk_identity != NULL)
3193 OPENSSL_free(s->session->psk_identity);
3194 s->session->psk_identity = BUF_strdup(identity);
3195 if (s->session->psk_identity == NULL)
3197 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3198 ERR_R_MALLOC_FAILURE);
3202 s->session->master_key_length =
3203 s->method->ssl3_enc->generate_master_secret(s,
3204 s->session->master_key,
3205 psk_or_pre_ms, pre_ms_len);
3206 s2n(identity_len, p);
3207 memcpy(p, identity, identity_len);
3208 n = 2 + identity_len;
3211 OPENSSL_cleanse(identity, sizeof(identity));
3212 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3215 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3222 ssl3_send_alert(s, SSL3_AL_FATAL,
3223 SSL_AD_HANDSHAKE_FAILURE);
3224 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3225 ERR_R_INTERNAL_ERROR);
3229 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3230 s->state=SSL3_ST_CW_KEY_EXCH_B;
3233 /* SSL3_ST_CW_KEY_EXCH_B */
3234 return ssl_do_write(s);
3236 #ifndef OPENSSL_NO_ECDH
3237 BN_CTX_free(bn_ctx);
3238 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3239 if (clnt_ecdh != NULL)
3240 EC_KEY_free(clnt_ecdh);
3241 EVP_PKEY_free(srvr_pub_pkey);
3246 int ssl3_send_client_verify(SSL *s)
3249 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3251 EVP_PKEY_CTX *pctx=NULL;
3257 EVP_MD_CTX_init(&mctx);
3259 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3261 p= ssl_handshake_start(s);
3262 pkey=s->cert->key->privatekey;
3263 /* Create context from key and test if sha1 is allowed as digest */
3264 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3265 EVP_PKEY_sign_init(pctx);
3266 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3268 if (!SSL_USE_SIGALGS(s))
3269 s->method->ssl3_enc->cert_verify_mac(s,
3271 &(data[MD5_DIGEST_LENGTH]));
3277 /* For TLS v1.2 send signature algorithm and signature
3278 * using agreed digest and cached handshake records.
3280 if (SSL_USE_SIGALGS(s))
3284 const EVP_MD *md = s->cert->key->digest;
3285 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3287 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3289 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3290 ERR_R_INTERNAL_ERROR);
3295 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3298 if (!EVP_SignInit_ex(&mctx, md, NULL)
3299 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3300 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3302 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3308 if (!ssl3_digest_cached_records(s))
3312 #ifndef OPENSSL_NO_RSA
3313 if (pkey->type == EVP_PKEY_RSA)
3315 s->method->ssl3_enc->cert_verify_mac(s,
3318 if (RSA_sign(NID_md5_sha1, data,
3319 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3320 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3322 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3330 #ifndef OPENSSL_NO_DSA
3331 if (pkey->type == EVP_PKEY_DSA)
3333 if (!DSA_sign(pkey->save_type,
3334 &(data[MD5_DIGEST_LENGTH]),
3335 SHA_DIGEST_LENGTH,&(p[2]),
3336 (unsigned int *)&j,pkey->pkey.dsa))
3338 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3346 #ifndef OPENSSL_NO_ECDSA
3347 if (pkey->type == EVP_PKEY_EC)
3349 if (!ECDSA_sign(pkey->save_type,
3350 &(data[MD5_DIGEST_LENGTH]),
3351 SHA_DIGEST_LENGTH,&(p[2]),
3352 (unsigned int *)&j,pkey->pkey.ec))
3354 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3363 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3365 unsigned char signbuf[64];
3368 s->method->ssl3_enc->cert_verify_mac(s,
3369 NID_id_GostR3411_94,
3371 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3372 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3373 ERR_R_INTERNAL_ERROR);
3376 for (i=63,j=0; i>=0; j++, i--) {
3384 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3387 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3388 s->state=SSL3_ST_CW_CERT_VRFY_B;
3390 EVP_MD_CTX_cleanup(&mctx);
3391 EVP_PKEY_CTX_free(pctx);
3392 return ssl_do_write(s);
3394 EVP_MD_CTX_cleanup(&mctx);
3395 EVP_PKEY_CTX_free(pctx);
3399 /* Check a certificate can be used for client authentication. Currently
3400 * check cert exists, if we have a suitable digest for TLS 1.2 if
3401 * static DH client certificates can be used and optionally checks
3402 * suitability for Suite B.
3404 static int ssl3_check_client_certificate(SSL *s)
3406 unsigned long alg_k;
3407 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3409 /* If no suitable signature algorithm can't use certificate */
3410 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3412 /* If strict mode check suitability of chain before using it.
3413 * This also adjusts suite B digest if necessary.
3415 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3416 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3418 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3419 /* See if we can use client certificate for fixed DH */
3420 if (alg_k & (SSL_kDHr|SSL_kDHd))
3422 SESS_CERT *scert = s->session->sess_cert;
3423 int i = scert->peer_cert_type;
3424 EVP_PKEY *clkey = NULL, *spkey = NULL;
3425 clkey = s->cert->key->privatekey;
3426 /* If client key not DH assume it can be used */
3427 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3430 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3433 /* Compare server and client parameters */
3434 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3435 EVP_PKEY_free(spkey);
3439 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3444 int ssl3_send_client_certificate(SSL *s)
3447 EVP_PKEY *pkey=NULL;
3450 if (s->state == SSL3_ST_CW_CERT_A)
3452 /* Let cert callback update client certificates if required */
3453 if (s->cert->cert_cb)
3455 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3458 s->rwstate=SSL_X509_LOOKUP;
3463 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3466 s->rwstate=SSL_NOTHING;
3468 if (ssl3_check_client_certificate(s))
3469 s->state=SSL3_ST_CW_CERT_C;
3471 s->state=SSL3_ST_CW_CERT_B;
3474 /* We need to get a client cert */
3475 if (s->state == SSL3_ST_CW_CERT_B)
3477 /* If we get an error, we need to
3478 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3479 * We then get retied later */
3481 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3484 s->rwstate=SSL_X509_LOOKUP;
3487 s->rwstate=SSL_NOTHING;
3488 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3490 s->state=SSL3_ST_CW_CERT_B;
3491 if ( !SSL_use_certificate(s,x509) ||
3492 !SSL_use_PrivateKey(s,pkey))
3498 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3501 if (x509 != NULL) X509_free(x509);
3502 if (pkey != NULL) EVP_PKEY_free(pkey);
3503 if (i && !ssl3_check_client_certificate(s))
3507 if (s->version == SSL3_VERSION)
3509 s->s3->tmp.cert_req=0;
3510 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3515 s->s3->tmp.cert_req=2;
3519 /* Ok, we have a cert */
3520 s->state=SSL3_ST_CW_CERT_C;
3523 if (s->state == SSL3_ST_CW_CERT_C)
3525 s->state=SSL3_ST_CW_CERT_D;
3526 if (!ssl3_output_cert_chain(s,
3527 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3529 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3530 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3534 /* SSL3_ST_CW_CERT_D */
3535 return ssl_do_write(s);
3538 #define has_bits(i,m) (((i)&(m)) == (m))
3540 int ssl3_check_cert_and_algorithm(SSL *s)
3544 EVP_PKEY *pkey=NULL;
3546 #ifndef OPENSSL_NO_RSA
3549 #ifndef OPENSSL_NO_DH
3553 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3554 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3556 /* we don't have a certificate */
3557 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3560 sc=s->session->sess_cert;
3563 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3567 #ifndef OPENSSL_NO_RSA
3568 rsa=s->session->sess_cert->peer_rsa_tmp;
3570 #ifndef OPENSSL_NO_DH
3571 dh=s->session->sess_cert->peer_dh_tmp;
3574 /* This is the passed certificate */
3576 idx=sc->peer_cert_type;
3577 #ifndef OPENSSL_NO_ECDH
3578 if (idx == SSL_PKEY_ECC)
3580 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3582 { /* check failed */
3583 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3591 else if (alg_a & SSL_aECDSA)
3593 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3596 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3598 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3602 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3603 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3604 EVP_PKEY_free(pkey);
3607 /* Check that we have a certificate if we require one */
3608 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3610 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3613 #ifndef OPENSSL_NO_DSA
3614 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3616 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3620 #ifndef OPENSSL_NO_RSA
3621 if ((alg_k & SSL_kRSA) &&
3622 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3624 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3628 #ifndef OPENSSL_NO_DH
3629 if ((alg_k & SSL_kDHE) &&
3630 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3632 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3635 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3636 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3638 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3641 #ifndef OPENSSL_NO_DSA
3642 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3643 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3645 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3651 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3653 #ifndef OPENSSL_NO_RSA
3654 if (alg_k & SSL_kRSA)
3657 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3659 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3665 #ifndef OPENSSL_NO_DH
3666 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3669 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3671 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3678 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3684 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3689 /* Check to see if handshake is full or resumed. Usually this is just a
3690 * case of checking to see if a cache hit has occurred. In the case of
3691 * session tickets we have to check the next message to be sure.
3694 #ifndef OPENSSL_NO_TLSEXT
3695 # ifndef OPENSSL_NO_NEXTPROTONEG
3696 int ssl3_send_next_proto(SSL *s)
3698 unsigned int len, padding_len;
3701 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3703 len = s->next_proto_negotiated_len;
3704 padding_len = 32 - ((len + 2) % 32);
3705 d = (unsigned char *)s->init_buf->data;
3707 memcpy(d + 5, s->next_proto_negotiated, len);
3708 d[5 + len] = padding_len;
3709 memset(d + 6 + len, 0, padding_len);
3710 *(d++)=SSL3_MT_NEXT_PROTO;
3711 l2n3(2 + len + padding_len, d);
3712 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3713 s->init_num = 4 + 2 + len + padding_len;
3717 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3721 int ssl3_check_finished(SSL *s)
3726 /* If we have no ticket it cannot be a resumed session. */
3727 if (!s->session->tlsext_tick)
3729 /* this function is called when we really expect a Certificate
3730 * message, so permit appropriate message length */
3731 n=s->method->ssl_get_message(s,
3737 if (!ok) return((int)n);
3738 s->s3->tmp.reuse_message = 1;
3740 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3741 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3748 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3751 #ifndef OPENSSL_NO_ENGINE
3752 if (s->ctx->client_cert_engine)
3754 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3755 SSL_get_client_CA_list(s),
3756 px509, ppkey, NULL, NULL, NULL);
3761 if (s->ctx->client_cert_cb)
3762 i = s->ctx->client_cert_cb(s,px509,ppkey);