2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
152 #include "ssl_locl.h"
153 #include "kssl_lcl.h"
154 #include <openssl/buffer.h>
155 #include <openssl/rand.h>
156 #include <openssl/objects.h>
157 #include <openssl/evp.h>
158 #include <openssl/md5.h>
160 #include <openssl/fips.h>
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_ENGINE
167 #include <openssl/engine.h>
170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
173 static const SSL_METHOD *ssl3_get_client_method(int ver)
175 if (ver == SSL3_VERSION)
176 return(SSLv3_client_method());
181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 ssl_undefined_function,
184 ssl3_get_client_method)
186 int ssl3_connect(SSL *s)
189 unsigned long Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
192 int new_state,state,skip=0;
194 RAND_add(&Time,sizeof(Time),0);
198 if (s->info_callback != NULL)
200 else if (s->ctx->info_callback != NULL)
201 cb=s->ctx->info_callback;
204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
206 #ifndef OPENSSL_NO_HEARTBEATS
207 /* If we're awaiting a HeartbeatResponse, pretend we
208 * already got and don't await it anymore, because
209 * Heartbeats don't make sense during handshakes anyway.
211 if (s->tlsext_hb_pending)
213 s->tlsext_hb_pending = 0;
224 case SSL_ST_RENEGOTIATE:
226 s->state=SSL_ST_CONNECT;
227 s->ctx->stats.sess_connect_renegotiate++;
231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 case SSL_ST_OK|SSL_ST_CONNECT:
235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
237 if ((s->version & 0xff00 ) != 0x0300)
239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
244 /* s->version=SSL3_VERSION; */
245 s->type=SSL_ST_CONNECT;
247 if (s->init_buf == NULL)
249 if ((buf=BUF_MEM_new()) == NULL)
254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
265 /* setup buffing BIO */
266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
268 /* don't push the buffering BIO quite yet */
270 ssl3_init_finished_mac(s);
272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 s->ctx->stats.sess_connect++;
277 case SSL3_ST_CW_CLNT_HELLO_A:
278 case SSL3_ST_CW_CLNT_HELLO_B:
281 ret=ssl3_client_hello(s);
282 if (ret <= 0) goto end;
283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
286 /* turn on buffering for the next lot of output */
287 if (s->bbio != s->wbio)
288 s->wbio=BIO_push(s->bbio,s->wbio);
292 case SSL3_ST_CR_SRVR_HELLO_A:
293 case SSL3_ST_CR_SRVR_HELLO_B:
294 ret=ssl3_get_server_hello(s);
295 if (ret <= 0) goto end;
299 s->state=SSL3_ST_CR_FINISHED_A;
300 #ifndef OPENSSL_NO_TLSEXT
301 if (s->tlsext_ticket_expected)
303 /* receive renewed session ticket */
304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
310 s->state=SSL3_ST_CR_CERT_A;
314 case SSL3_ST_CR_CERT_A:
315 case SSL3_ST_CR_CERT_B:
316 #ifndef OPENSSL_NO_TLSEXT
317 ret=ssl3_check_finished(s);
318 if (ret <= 0) goto end;
322 if (s->tlsext_ticket_expected)
323 s->state=SSL3_ST_CR_SESSION_TICKET_A;
325 s->state=SSL3_ST_CR_FINISHED_A;
330 /* Check if it is anon DH/ECDH */
332 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
333 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
335 ret=ssl3_get_server_certificate(s);
336 if (ret <= 0) goto end;
337 #ifndef OPENSSL_NO_TLSEXT
338 if (s->tlsext_status_expected)
339 s->state=SSL3_ST_CR_CERT_STATUS_A;
341 s->state=SSL3_ST_CR_KEY_EXCH_A;
346 s->state=SSL3_ST_CR_KEY_EXCH_A;
353 s->state=SSL3_ST_CR_KEY_EXCH_A;
358 case SSL3_ST_CR_KEY_EXCH_A:
359 case SSL3_ST_CR_KEY_EXCH_B:
360 ret=ssl3_get_key_exchange(s);
361 if (ret <= 0) goto end;
362 s->state=SSL3_ST_CR_CERT_REQ_A;
365 /* at this point we check that we have the
366 * required stuff from the server */
367 if (!ssl3_check_cert_and_algorithm(s))
374 case SSL3_ST_CR_CERT_REQ_A:
375 case SSL3_ST_CR_CERT_REQ_B:
376 ret=ssl3_get_certificate_request(s);
377 if (ret <= 0) goto end;
378 s->state=SSL3_ST_CR_SRVR_DONE_A;
382 case SSL3_ST_CR_SRVR_DONE_A:
383 case SSL3_ST_CR_SRVR_DONE_B:
384 ret=ssl3_get_server_done(s);
385 if (ret <= 0) goto end;
386 #ifndef OPENSSL_NO_SRP
387 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
389 if ((ret = SRP_Calc_A_param(s))<=0)
391 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
392 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
397 if (s->s3->tmp.cert_req)
398 s->state=SSL3_ST_CW_CERT_A;
400 s->state=SSL3_ST_CW_KEY_EXCH_A;
405 case SSL3_ST_CW_CERT_A:
406 case SSL3_ST_CW_CERT_B:
407 case SSL3_ST_CW_CERT_C:
408 case SSL3_ST_CW_CERT_D:
409 ret=ssl3_send_client_certificate(s);
410 if (ret <= 0) goto end;
411 s->state=SSL3_ST_CW_KEY_EXCH_A;
415 case SSL3_ST_CW_KEY_EXCH_A:
416 case SSL3_ST_CW_KEY_EXCH_B:
417 ret=ssl3_send_client_key_exchange(s);
418 if (ret <= 0) goto end;
419 /* EAY EAY EAY need to check for DH fix cert
421 /* For TLS, cert_req is set to 2, so a cert chain
422 * of nothing is sent, but no verify packet is sent */
423 /* XXX: For now, we do not support client
424 * authentication in ECDH cipher suites with
425 * ECDH (rather than ECDSA) certificates.
426 * We need to skip the certificate verify
427 * message when client's ECDH public key is sent
428 * inside the client certificate.
430 if (s->s3->tmp.cert_req == 1)
432 s->state=SSL3_ST_CW_CERT_VRFY_A;
436 s->state=SSL3_ST_CW_CHANGE_A;
437 s->s3->change_cipher_spec=0;
439 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
441 s->state=SSL3_ST_CW_CHANGE_A;
442 s->s3->change_cipher_spec=0;
448 case SSL3_ST_CW_CERT_VRFY_A:
449 case SSL3_ST_CW_CERT_VRFY_B:
450 ret=ssl3_send_client_verify(s);
451 if (ret <= 0) goto end;
452 s->state=SSL3_ST_CW_CHANGE_A;
454 s->s3->change_cipher_spec=0;
457 case SSL3_ST_CW_CHANGE_A:
458 case SSL3_ST_CW_CHANGE_B:
459 ret=ssl3_send_change_cipher_spec(s,
460 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
461 if (ret <= 0) goto end;
463 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
464 s->state=SSL3_ST_CW_FINISHED_A;
466 if (s->s3->next_proto_neg_seen)
467 s->state=SSL3_ST_CW_NEXT_PROTO_A;
469 s->state=SSL3_ST_CW_FINISHED_A;
473 s->session->cipher=s->s3->tmp.new_cipher;
474 #ifdef OPENSSL_NO_COMP
475 s->session->compress_meth=0;
477 if (s->s3->tmp.new_compression == NULL)
478 s->session->compress_meth=0;
480 s->session->compress_meth=
481 s->s3->tmp.new_compression->id;
483 if (!s->method->ssl3_enc->setup_key_block(s))
489 if (!s->method->ssl3_enc->change_cipher_state(s,
490 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
498 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
499 case SSL3_ST_CW_NEXT_PROTO_A:
500 case SSL3_ST_CW_NEXT_PROTO_B:
501 ret=ssl3_send_next_proto(s);
502 if (ret <= 0) goto end;
503 s->state=SSL3_ST_CW_FINISHED_A;
507 case SSL3_ST_CW_FINISHED_A:
508 case SSL3_ST_CW_FINISHED_B:
509 ret=ssl3_send_finished(s,
510 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
511 s->method->ssl3_enc->client_finished_label,
512 s->method->ssl3_enc->client_finished_label_len);
513 if (ret <= 0) goto end;
514 s->s3->flags |= SSL3_FLAGS_CCS_OK;
515 s->state=SSL3_ST_CW_FLUSH;
518 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
521 s->s3->tmp.next_state=SSL_ST_OK;
522 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
525 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
526 s->s3->delay_buf_pop_ret=0;
531 #ifndef OPENSSL_NO_TLSEXT
532 /* Allow NewSessionTicket if ticket expected */
533 if (s->tlsext_ticket_expected)
534 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
538 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
543 #ifndef OPENSSL_NO_TLSEXT
544 case SSL3_ST_CR_SESSION_TICKET_A:
545 case SSL3_ST_CR_SESSION_TICKET_B:
546 ret=ssl3_get_new_session_ticket(s);
547 if (ret <= 0) goto end;
548 s->state=SSL3_ST_CR_FINISHED_A;
552 case SSL3_ST_CR_CERT_STATUS_A:
553 case SSL3_ST_CR_CERT_STATUS_B:
554 ret=ssl3_get_cert_status(s);
555 if (ret <= 0) goto end;
556 s->state=SSL3_ST_CR_KEY_EXCH_A;
561 case SSL3_ST_CR_FINISHED_A:
562 case SSL3_ST_CR_FINISHED_B:
564 s->s3->flags |= SSL3_FLAGS_CCS_OK;
565 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
566 SSL3_ST_CR_FINISHED_B);
567 if (ret <= 0) goto end;
570 s->state=SSL3_ST_CW_CHANGE_A;
576 case SSL3_ST_CW_FLUSH:
577 s->rwstate=SSL_WRITING;
578 if (BIO_flush(s->wbio) <= 0)
583 s->rwstate=SSL_NOTHING;
584 s->state=s->s3->tmp.next_state;
588 /* clean a few things up */
589 ssl3_cleanup_key_block(s);
591 if (s->init_buf != NULL)
593 BUF_MEM_free(s->init_buf);
597 /* If we are not 'joining' the last two packets,
598 * remove the buffering now */
599 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
600 ssl_free_wbio_buffer(s);
601 /* else do it later in ssl3_write */
607 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
608 if (s->hit) s->ctx->stats.sess_hit++;
612 s->handshake_func=ssl3_connect;
613 s->ctx->stats.sess_connect_good++;
615 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
621 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
627 /* did we do anything */
628 if (!s->s3->tmp.reuse_message && !skip)
632 if ((ret=BIO_flush(s->wbio)) <= 0)
636 if ((cb != NULL) && (s->state != state))
640 cb(s,SSL_CB_CONNECT_LOOP,1);
651 cb(s,SSL_CB_CONNECT_EXIT,ret);
656 int ssl3_client_hello(SSL *s)
663 #ifndef OPENSSL_NO_COMP
668 buf=(unsigned char *)s->init_buf->data;
669 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
671 SSL_SESSION *sess = s->session;
672 if ((sess == NULL) ||
673 (sess->ssl_version != s->version) ||
674 #ifdef OPENSSL_NO_TLSEXT
675 !sess->session_id_length ||
677 (!sess->session_id_length && !sess->tlsext_tick) ||
679 (sess->not_resumable))
681 if (!ssl_get_new_session(s,0))
684 if (s->method->version == DTLS_ANY_VERSION)
686 /* Determine which DTLS version to use */
687 int options = s->options;
688 /* If DTLS 1.2 disabled correct the version number */
689 if (options & SSL_OP_NO_DTLSv1_2)
693 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
696 /* Disabling all versions is silly: return an
699 if (options & SSL_OP_NO_DTLSv1)
701 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
704 /* Update method so we don't use any DTLS 1.2
707 s->method = DTLSv1_client_method();
708 s->version = DTLS1_VERSION;
712 /* We only support one version: update method */
713 if (options & SSL_OP_NO_DTLSv1)
714 s->method = DTLSv1_2_client_method();
715 s->version = DTLS1_2_VERSION;
717 s->client_version = s->version;
719 /* else use the pre-loaded session */
721 p=s->s3->client_random;
723 /* for DTLS if client_random is initialized, reuse it, we are
724 * required to use same upon reply to HelloVerify */
729 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
742 ssl_fill_hello_random(s, 0, p,
743 sizeof(s->s3->client_random));
745 /* Do the message type and length last */
746 d=p= ssl_handshake_start(s);
748 /* version indicates the negotiated version: for example from
749 * an SSLv2/v3 compatible client hello). The client_version
750 * field is the maximum version we permit and it is also
751 * used in RSA encrypted premaster secrets. Some servers can
752 * choke if we initially report a higher version then
753 * renegotiate to a lower one in the premaster secret. This
754 * didn't happen with TLS 1.0 as most servers supported it
755 * but it can with TLS 1.1 or later if the server only supports
758 * Possible scenario with previous logic:
759 * 1. Client hello indicates TLS 1.2
760 * 2. Server hello says TLS 1.0
761 * 3. RSA encrypted premaster secret uses 1.2.
762 * 4. Handhaked proceeds using TLS 1.0.
763 * 5. Server sends hello request to renegotiate.
764 * 6. Client hello indicates TLS v1.0 as we now
765 * know that is maximum server supports.
766 * 7. Server chokes on RSA encrypted premaster secret
767 * containing version 1.0.
769 * For interoperability it should be OK to always use the
770 * maximum version we support in client hello and then rely
771 * on the checking of version to ensure the servers isn't
772 * being inconsistent: for example initially negotiating with
773 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
774 * client_version in client hello and not resetting it to
775 * the negotiated version.
778 *(p++)=s->version>>8;
779 *(p++)=s->version&0xff;
780 s->client_version=s->version;
782 *(p++)=s->client_version>>8;
783 *(p++)=s->client_version&0xff;
787 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
794 i=s->session->session_id_length;
798 if (i > (int)sizeof(s->session->session_id))
800 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
803 memcpy(p,s->session->session_id,i);
807 /* cookie stuff for DTLS */
810 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
812 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
815 *(p++) = s->d1->cookie_len;
816 memcpy(p, s->d1->cookie, s->d1->cookie_len);
817 p += s->d1->cookie_len;
820 /* Ciphers supported */
821 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
824 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
827 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
828 /* Some servers hang if client hello > 256 bytes
829 * as hack workaround chop number of supported ciphers
830 * to keep it well below this if we use TLS v1.2
832 if (TLS1_get_version(s) >= TLS1_2_VERSION
833 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
834 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
840 #ifdef OPENSSL_NO_COMP
844 if ((s->options & SSL_OP_NO_COMPRESSION)
845 || !s->ctx->comp_methods)
848 j=sk_SSL_COMP_num(s->ctx->comp_methods);
852 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
856 *(p++)=0; /* Add the NULL method */
858 #ifndef OPENSSL_NO_TLSEXT
860 if (ssl_prepare_clienthello_tlsext(s) <= 0)
862 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
865 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
867 ssl3_send_alert(s,SSL3_AL_FATAL,al);
868 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
874 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
875 s->state=SSL3_ST_CW_CLNT_HELLO_B;
878 /* SSL3_ST_CW_CLNT_HELLO_B */
879 return ssl_do_write(s);
884 int ssl3_get_server_hello(SSL *s)
886 STACK_OF(SSL_CIPHER) *sk;
890 int i,al=SSL_AD_INTERNAL_ERROR,ok;
893 #ifndef OPENSSL_NO_COMP
896 /* Hello verify request and/or server hello version may not
897 * match so set first packet if we're negotiating version.
902 n=s->method->ssl_get_message(s,
903 SSL3_ST_CR_SRVR_HELLO_A,
904 SSL3_ST_CR_SRVR_HELLO_B,
909 if (!ok) return((int)n);
914 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
916 if ( s->d1->send_cookie == 0)
918 s->s3->tmp.reuse_message = 1;
921 else /* already sent a cookie */
923 al=SSL_AD_UNEXPECTED_MESSAGE;
924 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
930 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
932 al=SSL_AD_UNEXPECTED_MESSAGE;
933 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
937 d=p=(unsigned char *)s->init_msg;
938 if (s->method->version == DTLS_ANY_VERSION)
940 /* Work out correct protocol version to use */
941 int hversion = (p[0] << 8)|p[1];
942 int options = s->options;
943 if (hversion == DTLS1_2_VERSION
944 && !(options & SSL_OP_NO_DTLSv1_2))
945 s->method = DTLSv1_2_client_method();
946 else if (tls1_suiteb(s))
948 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
949 s->version = hversion;
950 al = SSL_AD_PROTOCOL_VERSION;
953 else if (hversion == DTLS1_VERSION
954 && !(options & SSL_OP_NO_DTLSv1))
955 s->method = DTLSv1_client_method();
958 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
959 s->version = hversion;
960 al = SSL_AD_PROTOCOL_VERSION;
963 s->version = s->client_version = s->method->version;
966 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
968 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
969 s->version=(s->version&0xff00)|p[1];
970 al=SSL_AD_PROTOCOL_VERSION;
975 /* load the server hello data */
976 /* load the server random */
977 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
980 /* get the session-id */
983 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
985 al=SSL_AD_ILLEGAL_PARAMETER;
986 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
990 #ifndef OPENSSL_NO_TLSEXT
991 /* check if we want to resume the session based on external pre-shared secret */
992 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
994 SSL_CIPHER *pref_cipher=NULL;
995 s->session->master_key_length=sizeof(s->session->master_key);
996 if (s->tls_session_secret_cb(s, s->session->master_key,
997 &s->session->master_key_length,
999 s->tls_session_secret_cb_arg))
1001 s->session->cipher = pref_cipher ?
1002 pref_cipher : ssl_get_cipher_by_char(s, p+j);
1003 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1006 #endif /* OPENSSL_NO_TLSEXT */
1008 if (j != 0 && j == s->session->session_id_length
1009 && memcmp(p,s->session->session_id,j) == 0)
1011 if(s->sid_ctx_length != s->session->sid_ctx_length
1012 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1014 /* actually a client application bug */
1015 al=SSL_AD_ILLEGAL_PARAMETER;
1016 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1019 s->s3->flags |= SSL3_FLAGS_CCS_OK;
1022 else /* a miss or crap from the other end */
1024 /* If we were trying for session-id reuse, make a new
1025 * SSL_SESSION so we don't stuff up other people */
1027 if (s->session->session_id_length > 0)
1029 if (!ssl_get_new_session(s,0))
1034 s->session->session_id_length=j;
1035 memcpy(s->session->session_id,p,j); /* j could be 0 */
1038 c=ssl_get_cipher_by_char(s,p);
1041 /* unknown cipher */
1042 al=SSL_AD_ILLEGAL_PARAMETER;
1043 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1046 /* If it is a disabled cipher we didn't send it in client hello,
1047 * so return an error.
1049 if (c->algorithm_ssl & ct->mask_ssl ||
1050 c->algorithm_mkey & ct->mask_k ||
1051 c->algorithm_auth & ct->mask_a)
1053 al=SSL_AD_ILLEGAL_PARAMETER;
1054 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1057 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1059 sk=ssl_get_ciphers_by_id(s);
1060 i=sk_SSL_CIPHER_find(sk,c);
1063 /* we did not say we would use this cipher */
1064 al=SSL_AD_ILLEGAL_PARAMETER;
1065 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1069 /* Depending on the session caching (internal/external), the cipher
1070 and/or cipher_id values may not be set. Make sure that
1071 cipher_id is set and use it for comparison. */
1072 if (s->session->cipher)
1073 s->session->cipher_id = s->session->cipher->id;
1074 if (s->hit && (s->session->cipher_id != c->id))
1076 /* Workaround is now obsolete */
1079 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1082 al=SSL_AD_ILLEGAL_PARAMETER;
1083 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1087 s->s3->tmp.new_cipher=c;
1088 /* Don't digest cached records if no sigalgs: we may need them for
1089 * client authentication.
1091 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1093 /* lets get the compression algorithm */
1095 #ifdef OPENSSL_NO_COMP
1098 al=SSL_AD_ILLEGAL_PARAMETER;
1099 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1102 /* If compression is disabled we'd better not try to resume a session
1103 * using compression.
1105 if (s->session->compress_meth != 0)
1107 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1112 if (s->hit && j != s->session->compress_meth)
1114 al=SSL_AD_ILLEGAL_PARAMETER;
1115 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1120 else if (s->options & SSL_OP_NO_COMPRESSION)
1122 al=SSL_AD_ILLEGAL_PARAMETER;
1123 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1127 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1129 if ((j != 0) && (comp == NULL))
1131 al=SSL_AD_ILLEGAL_PARAMETER;
1132 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1137 s->s3->tmp.new_compression=comp;
1141 #ifndef OPENSSL_NO_TLSEXT
1143 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1145 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1152 /* wrong packet length */
1153 al=SSL_AD_DECODE_ERROR;
1154 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1160 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1165 int ssl3_get_server_certificate(SSL *s)
1167 int al,i,ok,ret= -1;
1168 unsigned long n,nc,llen,l;
1170 const unsigned char *q,*p;
1172 STACK_OF(X509) *sk=NULL;
1174 EVP_PKEY *pkey=NULL;
1175 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1177 n=s->method->ssl_get_message(s,
1184 if (!ok) return((int)n);
1186 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1187 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1188 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1190 s->s3->tmp.reuse_message=1;
1194 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1196 al=SSL_AD_UNEXPECTED_MESSAGE;
1197 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1200 p=d=(unsigned char *)s->init_msg;
1202 if ((sk=sk_X509_new_null()) == NULL)
1204 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1211 al=SSL_AD_DECODE_ERROR;
1212 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1215 for (nc=0; nc<llen; )
1218 if ((l+nc+3) > llen)
1220 al=SSL_AD_DECODE_ERROR;
1221 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1226 x=d2i_X509(NULL,&q,l);
1229 al=SSL_AD_BAD_CERTIFICATE;
1230 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1235 al=SSL_AD_DECODE_ERROR;
1236 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1239 if (!sk_X509_push(sk,x))
1241 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1249 i=ssl_verify_cert_chain(s,sk);
1250 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1251 #ifndef OPENSSL_NO_KRB5
1252 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1253 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1254 #endif /* OPENSSL_NO_KRB5 */
1257 al=ssl_verify_alarm_type(s->verify_result);
1258 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1261 ERR_clear_error(); /* but we keep s->verify_result */
1263 sc=ssl_sess_cert_new();
1264 if (sc == NULL) goto err;
1266 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1267 s->session->sess_cert=sc;
1270 /* Inconsistency alert: cert_chain does include the peer's
1271 * certificate, which we don't include in s3_srvr.c */
1272 x=sk_X509_value(sk,0);
1274 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1276 pkey=X509_get_pubkey(x);
1278 /* VRS: allow null cert if auth == KRB5 */
1279 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1280 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1284 printf("pkey,x = %p, %p\n", pkey,x);
1285 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1286 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1287 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1288 #endif /* KSSL_DEBUG */
1290 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1294 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1295 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1299 i=ssl_cert_type(x,pkey);
1300 if (need_cert && i < 0)
1304 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1305 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1311 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1312 if (exp_idx >= 0 && i != exp_idx)
1315 al=SSL_AD_ILLEGAL_PARAMETER;
1316 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1317 SSL_R_WRONG_CERTIFICATE_TYPE);
1320 sc->peer_cert_type=i;
1321 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1322 /* Why would the following ever happen?
1323 * We just created sc a couple of lines ago. */
1324 if (sc->peer_pkeys[i].x509 != NULL)
1325 X509_free(sc->peer_pkeys[i].x509);
1326 sc->peer_pkeys[i].x509=x;
1327 sc->peer_key= &(sc->peer_pkeys[i]);
1329 if (s->session->peer != NULL)
1330 X509_free(s->session->peer);
1331 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1336 sc->peer_cert_type=i;
1339 if (s->session->peer != NULL)
1340 X509_free(s->session->peer);
1341 s->session->peer=NULL;
1343 s->session->verify_result = s->verify_result;
1350 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1353 EVP_PKEY_free(pkey);
1355 sk_X509_pop_free(sk,X509_free);
1359 int ssl3_get_key_exchange(SSL *s)
1361 #ifndef OPENSSL_NO_RSA
1362 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1365 unsigned char *param,*p;
1366 int al,i,j,param_len,ok;
1368 EVP_PKEY *pkey=NULL;
1369 const EVP_MD *md = NULL;
1370 #ifndef OPENSSL_NO_RSA
1373 #ifndef OPENSSL_NO_DH
1376 #ifndef OPENSSL_NO_ECDH
1377 EC_KEY *ecdh = NULL;
1378 BN_CTX *bn_ctx = NULL;
1379 EC_POINT *srvr_ecpoint = NULL;
1381 int encoded_pt_len = 0;
1384 /* use same message size as in ssl3_get_certificate_request()
1385 * as ServerKeyExchange message may be skipped */
1386 n=s->method->ssl_get_message(s,
1387 SSL3_ST_CR_KEY_EXCH_A,
1388 SSL3_ST_CR_KEY_EXCH_B,
1392 if (!ok) return((int)n);
1394 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1396 #ifndef OPENSSL_NO_PSK
1397 /* In plain PSK ciphersuite, ServerKeyExchange can be
1398 omitted if no identity hint is sent. Set
1399 session->sess_cert anyway to avoid problems
1401 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1403 s->session->sess_cert=ssl_sess_cert_new();
1404 if (s->ctx->psk_identity_hint)
1405 OPENSSL_free(s->ctx->psk_identity_hint);
1406 s->ctx->psk_identity_hint = NULL;
1409 s->s3->tmp.reuse_message=1;
1413 param=p=(unsigned char *)s->init_msg;
1414 if (s->session->sess_cert != NULL)
1416 #ifndef OPENSSL_NO_RSA
1417 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1419 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1420 s->session->sess_cert->peer_rsa_tmp=NULL;
1423 #ifndef OPENSSL_NO_DH
1424 if (s->session->sess_cert->peer_dh_tmp)
1426 DH_free(s->session->sess_cert->peer_dh_tmp);
1427 s->session->sess_cert->peer_dh_tmp=NULL;
1430 #ifndef OPENSSL_NO_ECDH
1431 if (s->session->sess_cert->peer_ecdh_tmp)
1433 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1434 s->session->sess_cert->peer_ecdh_tmp=NULL;
1440 s->session->sess_cert=ssl_sess_cert_new();
1444 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1445 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1446 EVP_MD_CTX_init(&md_ctx);
1448 #ifndef OPENSSL_NO_PSK
1449 if (alg_k & SSL_kPSK)
1451 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1453 al=SSL_AD_HANDSHAKE_FAILURE;
1456 /* Store PSK identity hint for later use, hint is used
1457 * in ssl3_send_client_key_exchange. Assume that the
1458 * maximum length of a PSK identity hint can be as
1459 * long as the maximum length of a PSK identity. */
1460 if (i > PSK_MAX_IDENTITY_LEN)
1462 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1463 SSL_R_DATA_LENGTH_TOO_LONG);
1468 al=SSL_AD_DECODE_ERROR;
1469 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1470 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1473 /* If received PSK identity hint contains NULL
1474 * characters, the hint is truncated from the first
1475 * NULL. p may not be ending with NULL, so create a
1476 * NULL-terminated string. */
1477 memcpy(tmp_id_hint, p, i);
1478 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1479 if (s->ctx->psk_identity_hint != NULL)
1480 OPENSSL_free(s->ctx->psk_identity_hint);
1481 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1482 if (s->ctx->psk_identity_hint == NULL)
1484 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1492 #endif /* !OPENSSL_NO_PSK */
1493 #ifndef OPENSSL_NO_SRP
1494 if (alg_k & SSL_kSRP)
1500 al=SSL_AD_DECODE_ERROR;
1501 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1504 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1506 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1515 al=SSL_AD_DECODE_ERROR;
1516 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1519 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1526 i = (unsigned int)(p[0]);
1531 al=SSL_AD_DECODE_ERROR;
1532 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1535 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1546 al=SSL_AD_DECODE_ERROR;
1547 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1550 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1552 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1558 /* We must check if there is a certificate */
1559 #ifndef OPENSSL_NO_RSA
1560 if (alg_a & SSL_aRSA)
1561 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1566 #ifndef OPENSSL_NO_DSA
1567 else if (alg_a & SSL_aDSS)
1568 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1572 #endif /* !OPENSSL_NO_SRP */
1573 #ifndef OPENSSL_NO_RSA
1574 if (alg_k & SSL_kRSA)
1576 if ((rsa=RSA_new()) == NULL)
1578 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1585 al=SSL_AD_DECODE_ERROR;
1586 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1589 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1591 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1600 al=SSL_AD_DECODE_ERROR;
1601 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1604 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1606 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1612 /* this should be because we are using an export cipher */
1613 if (alg_a & SSL_aRSA)
1614 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1617 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1620 s->session->sess_cert->peer_rsa_tmp=rsa;
1623 #else /* OPENSSL_NO_RSA */
1627 #ifndef OPENSSL_NO_DH
1628 else if (alg_k & SSL_kEDH)
1630 if ((dh=DH_new()) == NULL)
1632 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1639 al=SSL_AD_DECODE_ERROR;
1640 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1643 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1645 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1654 al=SSL_AD_DECODE_ERROR;
1655 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1658 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1660 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1669 al=SSL_AD_DECODE_ERROR;
1670 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1673 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1675 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1681 #ifndef OPENSSL_NO_RSA
1682 if (alg_a & SSL_aRSA)
1683 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1688 #ifndef OPENSSL_NO_DSA
1689 else if (alg_a & SSL_aDSS)
1690 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1692 /* else anonymous DH, so no certificate or pkey. */
1694 s->session->sess_cert->peer_dh_tmp=dh;
1697 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1699 al=SSL_AD_ILLEGAL_PARAMETER;
1700 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1703 #endif /* !OPENSSL_NO_DH */
1705 #ifndef OPENSSL_NO_ECDH
1706 else if (alg_k & SSL_kEECDH)
1709 const EC_GROUP *group;
1711 if ((ecdh=EC_KEY_new()) == NULL)
1713 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1717 /* Extract elliptic curve parameters and the
1718 * server's ephemeral ECDH public key.
1719 * Keep accumulating lengths of various components in
1720 * param_len and make sure it never exceeds n.
1723 /* XXX: For now we only support named (not generic) curves
1724 * and the ECParameters in this case is just three bytes.
1727 /* Check curve is one of our prefrences, if not server has
1728 * sent an invalid curve.
1730 if (!tls1_check_curve(s, p, param_len))
1732 al=SSL_AD_DECODE_ERROR;
1733 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1737 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1739 al=SSL_AD_INTERNAL_ERROR;
1740 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1744 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1747 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1750 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1752 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1755 EC_GROUP_free(ngroup);
1757 group = EC_KEY_get0_group(ecdh);
1759 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1760 (EC_GROUP_get_degree(group) > 163))
1762 al=SSL_AD_EXPORT_RESTRICTION;
1763 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1769 /* Next, get the encoded ECPoint */
1770 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1771 ((bn_ctx = BN_CTX_new()) == NULL))
1773 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1777 encoded_pt_len = *p; /* length of encoded point */
1779 param_len += (1 + encoded_pt_len);
1780 if ((param_len > n) ||
1781 (EC_POINT_oct2point(group, srvr_ecpoint,
1782 p, encoded_pt_len, bn_ctx) == 0))
1784 al=SSL_AD_DECODE_ERROR;
1785 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1792 /* The ECC/TLS specification does not mention
1793 * the use of DSA to sign ECParameters in the server
1794 * key exchange message. We do support RSA and ECDSA.
1797 #ifndef OPENSSL_NO_RSA
1798 else if (alg_a & SSL_aRSA)
1799 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1801 #ifndef OPENSSL_NO_ECDSA
1802 else if (alg_a & SSL_aECDSA)
1803 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1805 /* else anonymous ECDH, so no certificate or pkey. */
1806 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1807 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1809 BN_CTX_free(bn_ctx);
1811 EC_POINT_free(srvr_ecpoint);
1812 srvr_ecpoint = NULL;
1816 al=SSL_AD_UNEXPECTED_MESSAGE;
1817 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1820 #endif /* !OPENSSL_NO_ECDH */
1823 /* p points to the next byte, there are 'n' bytes left */
1825 /* if it was signed, check the signature */
1828 if (SSL_USE_SIGALGS(s))
1830 int rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1835 al = SSL_AD_DECODE_ERROR;
1839 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1849 j=EVP_PKEY_size(pkey);
1851 if ((i != n) || (n > j) || (n <= 0))
1853 /* wrong packet length */
1854 al=SSL_AD_DECODE_ERROR;
1855 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1859 #ifndef OPENSSL_NO_RSA
1860 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1866 for (num=2; num > 0; num--)
1868 EVP_MD_CTX_set_flags(&md_ctx,
1869 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1870 EVP_DigestInit_ex(&md_ctx,(num == 2)
1871 ?s->ctx->md5:s->ctx->sha1, NULL);
1872 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1873 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1874 EVP_DigestUpdate(&md_ctx,param,param_len);
1875 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1879 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1883 al=SSL_AD_DECRYPT_ERROR;
1884 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1890 al=SSL_AD_DECRYPT_ERROR;
1891 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1898 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1899 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1900 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1901 EVP_VerifyUpdate(&md_ctx,param,param_len);
1902 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1905 al=SSL_AD_DECRYPT_ERROR;
1906 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1913 /* aNULL or kPSK do not need public keys */
1914 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1916 /* Might be wrong key type, check it */
1917 if (ssl3_check_cert_and_algorithm(s))
1918 /* Otherwise this shouldn't happen */
1919 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1922 /* still data left over */
1925 al=SSL_AD_DECODE_ERROR;
1926 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1930 EVP_PKEY_free(pkey);
1931 EVP_MD_CTX_cleanup(&md_ctx);
1934 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1936 EVP_PKEY_free(pkey);
1937 #ifndef OPENSSL_NO_RSA
1941 #ifndef OPENSSL_NO_DH
1945 #ifndef OPENSSL_NO_ECDH
1946 BN_CTX_free(bn_ctx);
1947 EC_POINT_free(srvr_ecpoint);
1951 EVP_MD_CTX_cleanup(&md_ctx);
1955 int ssl3_get_certificate_request(SSL *s)
1958 unsigned long n,nc,l;
1959 unsigned int llen, ctype_num,i;
1961 const unsigned char *p,*q;
1963 STACK_OF(X509_NAME) *ca_sk=NULL;
1965 n=s->method->ssl_get_message(s,
1966 SSL3_ST_CR_CERT_REQ_A,
1967 SSL3_ST_CR_CERT_REQ_B,
1972 if (!ok) return((int)n);
1974 s->s3->tmp.cert_req=0;
1976 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1978 s->s3->tmp.reuse_message=1;
1979 /* If we get here we don't need any cached handshake records
1980 * as we wont be doing client auth.
1982 if (s->s3->handshake_buffer)
1984 if (!ssl3_digest_cached_records(s))
1990 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1992 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1993 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1997 /* TLS does not like anon-DH with client cert */
1998 if (s->version > SSL3_VERSION)
2000 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2002 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2003 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2008 p=d=(unsigned char *)s->init_msg;
2010 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2012 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2016 /* get the certificate types */
2018 if (s->cert->ctypes)
2020 OPENSSL_free(s->cert->ctypes);
2021 s->cert->ctypes = NULL;
2023 if (ctype_num > SSL3_CT_NUMBER)
2025 /* If we exceed static buffer copy all to cert structure */
2026 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2027 memcpy(s->cert->ctypes, p, ctype_num);
2028 s->cert->ctype_num = (size_t)ctype_num;
2029 ctype_num=SSL3_CT_NUMBER;
2031 for (i=0; i<ctype_num; i++)
2032 s->s3->tmp.ctype[i]= p[i];
2034 if (SSL_USE_SIGALGS(s))
2037 /* Check we have enough room for signature algorithms and
2038 * following length value.
2040 if ((unsigned long)(p - d + llen + 2) > n)
2042 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2043 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2046 /* Clear certificate digests and validity flags */
2047 for (i = 0; i < SSL_PKEY_NUM; i++)
2049 s->cert->pkeys[i].digest = NULL;
2050 s->cert->pkeys[i].valid_flags = 0;
2052 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2054 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2055 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2061 /* get the CA RDNs */
2066 out=fopen("/tmp/vsign.der","w");
2067 fwrite(p,1,llen,out);
2072 if ((unsigned long)(p - d + llen) != n)
2074 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2075 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2079 for (nc=0; nc<llen; )
2082 if ((l+nc+2) > llen)
2084 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2085 goto cont; /* netscape bugs */
2086 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2087 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2093 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2095 /* If netscape tolerance is on, ignore errors */
2096 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2100 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2101 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2108 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2109 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2112 if (!sk_X509_NAME_push(ca_sk,xn))
2114 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2128 /* we should setup a certificate to return.... */
2129 s->s3->tmp.cert_req=1;
2130 s->s3->tmp.ctype_num=ctype_num;
2131 if (s->s3->tmp.ca_names != NULL)
2132 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2133 s->s3->tmp.ca_names=ca_sk;
2138 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2142 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2144 return(X509_NAME_cmp(*a,*b));
2146 #ifndef OPENSSL_NO_TLSEXT
2147 int ssl3_get_new_session_ticket(SSL *s)
2149 int ok,al,ret=0, ticklen;
2151 const unsigned char *p;
2154 n=s->method->ssl_get_message(s,
2155 SSL3_ST_CR_SESSION_TICKET_A,
2156 SSL3_ST_CR_SESSION_TICKET_B,
2164 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2166 s->s3->tmp.reuse_message=1;
2169 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2171 al=SSL_AD_UNEXPECTED_MESSAGE;
2172 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2177 /* need at least ticket_lifetime_hint + ticket length */
2178 al = SSL_AD_DECODE_ERROR;
2179 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2183 p=d=(unsigned char *)s->init_msg;
2184 n2l(p, s->session->tlsext_tick_lifetime_hint);
2186 /* ticket_lifetime_hint + ticket_length + ticket */
2187 if (ticklen + 6 != n)
2189 al = SSL_AD_DECODE_ERROR;
2190 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2193 if (s->session->tlsext_tick)
2195 OPENSSL_free(s->session->tlsext_tick);
2196 s->session->tlsext_ticklen = 0;
2198 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2199 if (!s->session->tlsext_tick)
2201 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2204 memcpy(s->session->tlsext_tick, p, ticklen);
2205 s->session->tlsext_ticklen = ticklen;
2206 /* There are two ways to detect a resumed ticket sesion.
2207 * One is to set an appropriate session ID and then the server
2208 * must return a match in ServerHello. This allows the normal
2209 * client session ID matching to work and we know much
2210 * earlier that the ticket has been accepted.
2212 * The other way is to set zero length session ID when the
2213 * ticket is presented and rely on the handshake to determine
2214 * session resumption.
2216 * We choose the former approach because this fits in with
2217 * assumptions elsewhere in OpenSSL. The session ID is set
2218 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2221 EVP_Digest(p, ticklen,
2222 s->session->session_id, &s->session->session_id_length,
2223 #ifndef OPENSSL_NO_SHA256
2224 EVP_sha256(), NULL);
2231 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2236 int ssl3_get_cert_status(SSL *s)
2239 unsigned long resplen,n;
2240 const unsigned char *p;
2242 n=s->method->ssl_get_message(s,
2243 SSL3_ST_CR_CERT_STATUS_A,
2244 SSL3_ST_CR_CERT_STATUS_B,
2245 SSL3_MT_CERTIFICATE_STATUS,
2249 if (!ok) return((int)n);
2252 /* need at least status type + length */
2253 al = SSL_AD_DECODE_ERROR;
2254 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2257 p = (unsigned char *)s->init_msg;
2258 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2260 al = SSL_AD_DECODE_ERROR;
2261 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2265 if (resplen + 4 != n)
2267 al = SSL_AD_DECODE_ERROR;
2268 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2271 if (s->tlsext_ocsp_resp)
2272 OPENSSL_free(s->tlsext_ocsp_resp);
2273 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2274 if (!s->tlsext_ocsp_resp)
2276 al = SSL_AD_INTERNAL_ERROR;
2277 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2280 s->tlsext_ocsp_resplen = resplen;
2281 if (s->ctx->tlsext_status_cb)
2284 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2287 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2288 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2293 al = SSL_AD_INTERNAL_ERROR;
2294 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2300 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2305 int ssl3_get_server_done(SSL *s)
2310 n=s->method->ssl_get_message(s,
2311 SSL3_ST_CR_SRVR_DONE_A,
2312 SSL3_ST_CR_SRVR_DONE_B,
2313 SSL3_MT_SERVER_DONE,
2314 30, /* should be very small, like 0 :-) */
2317 if (!ok) return((int)n);
2320 /* should contain no data */
2321 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2322 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2330 int ssl3_send_client_key_exchange(SSL *s)
2334 unsigned long alg_k;
2335 #ifndef OPENSSL_NO_RSA
2337 EVP_PKEY *pkey=NULL;
2339 #ifndef OPENSSL_NO_KRB5
2341 #endif /* OPENSSL_NO_KRB5 */
2342 #ifndef OPENSSL_NO_ECDH
2343 EC_KEY *clnt_ecdh = NULL;
2344 const EC_POINT *srvr_ecpoint = NULL;
2345 EVP_PKEY *srvr_pub_pkey = NULL;
2346 unsigned char *encodedPoint = NULL;
2347 int encoded_pt_len = 0;
2348 BN_CTX * bn_ctx = NULL;
2351 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2353 p = ssl_handshake_start(s);
2355 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2357 /* Fool emacs indentation */
2359 #ifndef OPENSSL_NO_RSA
2360 else if (alg_k & SSL_kRSA)
2363 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2365 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2366 rsa=s->session->sess_cert->peer_rsa_tmp;
2369 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2370 if ((pkey == NULL) ||
2371 (pkey->type != EVP_PKEY_RSA) ||
2372 (pkey->pkey.rsa == NULL))
2374 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2378 EVP_PKEY_free(pkey);
2381 tmp_buf[0]=s->client_version>>8;
2382 tmp_buf[1]=s->client_version&0xff;
2383 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2386 s->session->master_key_length=sizeof tmp_buf;
2389 /* Fix buf for TLS and beyond */
2390 if (s->version > SSL3_VERSION)
2392 n=RSA_public_encrypt(sizeof tmp_buf,
2393 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2395 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2396 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2400 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2404 /* Fix buf for TLS and beyond */
2405 if (s->version > SSL3_VERSION)
2411 s->session->master_key_length=
2412 s->method->ssl3_enc->generate_master_secret(s,
2413 s->session->master_key,
2414 tmp_buf,sizeof tmp_buf);
2415 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2418 #ifndef OPENSSL_NO_KRB5
2419 else if (alg_k & SSL_kKRB5)
2421 krb5_error_code krb5rc;
2422 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2423 /* krb5_data krb5_ap_req; */
2424 krb5_data *enc_ticket;
2425 krb5_data authenticator, *authp = NULL;
2426 EVP_CIPHER_CTX ciph_ctx;
2427 const EVP_CIPHER *enc = NULL;
2428 unsigned char iv[EVP_MAX_IV_LENGTH];
2429 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2430 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2431 + EVP_MAX_IV_LENGTH];
2432 int padl, outl = sizeof(epms);
2434 EVP_CIPHER_CTX_init(&ciph_ctx);
2437 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2439 #endif /* KSSL_DEBUG */
2443 if (KRB5SENDAUTH) authp = &authenticator;
2444 #endif /* KRB5SENDAUTH */
2446 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2448 enc = kssl_map_enc(kssl_ctx->enctype);
2453 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2454 if (krb5rc && kssl_err.text)
2455 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2457 #endif /* KSSL_DEBUG */
2461 ssl3_send_alert(s,SSL3_AL_FATAL,
2462 SSL_AD_HANDSHAKE_FAILURE);
2463 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2468 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2469 ** in place of RFC 2712 KerberosWrapper, as in:
2471 ** Send ticket (copy to *p, set n = length)
2472 ** n = krb5_ap_req.length;
2473 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2474 ** if (krb5_ap_req.data)
2475 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2477 ** Now using real RFC 2712 KerberosWrapper
2478 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2479 ** Note: 2712 "opaque" types are here replaced
2480 ** with a 2-byte length followed by the value.
2482 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2483 ** Where "xx xx" = length bytes. Shown here with
2484 ** optional authenticator omitted.
2487 /* KerberosWrapper.Ticket */
2488 s2n(enc_ticket->length,p);
2489 memcpy(p, enc_ticket->data, enc_ticket->length);
2490 p+= enc_ticket->length;
2491 n = enc_ticket->length + 2;
2493 /* KerberosWrapper.Authenticator */
2494 if (authp && authp->length)
2496 s2n(authp->length,p);
2497 memcpy(p, authp->data, authp->length);
2499 n+= authp->length + 2;
2507 s2n(0,p);/* null authenticator length */
2511 tmp_buf[0]=s->client_version>>8;
2512 tmp_buf[1]=s->client_version&0xff;
2513 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2516 /* 20010420 VRS. Tried it this way; failed.
2517 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2518 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2519 ** kssl_ctx->length);
2520 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2523 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2524 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2526 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2528 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2530 if (outl > (int)sizeof epms)
2532 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2535 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2537 /* KerberosWrapper.EncryptedPreMasterSecret */
2539 memcpy(p, epms, outl);
2543 s->session->master_key_length=
2544 s->method->ssl3_enc->generate_master_secret(s,
2545 s->session->master_key,
2546 tmp_buf, sizeof tmp_buf);
2548 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2549 OPENSSL_cleanse(epms, outl);
2552 #ifndef OPENSSL_NO_DH
2553 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2555 DH *dh_srvr,*dh_clnt;
2556 SESS_CERT *scert = s->session->sess_cert;
2560 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2561 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2565 if (scert->peer_dh_tmp != NULL)
2566 dh_srvr=scert->peer_dh_tmp;
2569 /* we get them from the cert */
2570 int idx = scert->peer_cert_type;
2571 EVP_PKEY *spkey = NULL;
2574 spkey = X509_get_pubkey(
2575 scert->peer_pkeys[idx].x509);
2578 dh_srvr = EVP_PKEY_get1_DH(spkey);
2579 EVP_PKEY_free(spkey);
2581 if (dh_srvr == NULL)
2583 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2584 ERR_R_INTERNAL_ERROR);
2588 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2590 /* Use client certificate key */
2591 EVP_PKEY *clkey = s->cert->key->privatekey;
2594 dh_clnt = EVP_PKEY_get1_DH(clkey);
2595 if (dh_clnt == NULL)
2597 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2598 ERR_R_INTERNAL_ERROR);
2604 /* generate a new random key */
2605 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2607 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2610 if (!DH_generate_key(dh_clnt))
2612 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2618 /* use the 'p' output buffer for the DH key, but
2619 * make sure to clear it out afterwards */
2621 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2622 if (scert->peer_dh_tmp == NULL)
2627 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2632 /* generate master key from the result */
2633 s->session->master_key_length=
2634 s->method->ssl3_enc->generate_master_secret(s,
2635 s->session->master_key,p,n);
2639 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2643 /* send off the data */
2644 n=BN_num_bytes(dh_clnt->pub_key);
2646 BN_bn2bin(dh_clnt->pub_key,p);
2652 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2656 #ifndef OPENSSL_NO_ECDH
2657 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2659 const EC_GROUP *srvr_group = NULL;
2661 int ecdh_clnt_cert = 0;
2664 if (s->session->sess_cert == NULL)
2666 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2667 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2671 /* Did we send out the client's
2672 * ECDH share for use in premaster
2673 * computation as part of client certificate?
2674 * If so, set ecdh_clnt_cert to 1.
2676 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2678 /* XXX: For now, we do not support client
2679 * authentication using ECDH certificates.
2680 * To add such support, one needs to add
2681 * code that checks for appropriate
2682 * conditions and sets ecdh_clnt_cert to 1.
2683 * For example, the cert have an ECC
2684 * key on the same curve as the server's
2685 * and the key should be authorized for
2688 * One also needs to add code in ssl3_connect
2689 * to skip sending the certificate verify
2692 * if ((s->cert->key->privatekey != NULL) &&
2693 * (s->cert->key->privatekey->type ==
2694 * EVP_PKEY_EC) && ...)
2695 * ecdh_clnt_cert = 1;
2699 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2701 tkey = s->session->sess_cert->peer_ecdh_tmp;
2705 /* Get the Server Public Key from Cert */
2706 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2707 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2708 if ((srvr_pub_pkey == NULL) ||
2709 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2710 (srvr_pub_pkey->pkey.ec == NULL))
2712 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2713 ERR_R_INTERNAL_ERROR);
2717 tkey = srvr_pub_pkey->pkey.ec;
2720 srvr_group = EC_KEY_get0_group(tkey);
2721 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2723 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2725 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2726 ERR_R_INTERNAL_ERROR);
2730 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2732 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2736 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2738 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2743 /* Reuse key info from our certificate
2744 * We only need our private key to perform
2745 * the ECDH computation.
2747 const BIGNUM *priv_key;
2748 tkey = s->cert->key->privatekey->pkey.ec;
2749 priv_key = EC_KEY_get0_private_key(tkey);
2750 if (priv_key == NULL)
2752 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2755 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2757 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2763 /* Generate a new ECDH key pair */
2764 if (!(EC_KEY_generate_key(clnt_ecdh)))
2766 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2771 /* use the 'p' output buffer for the ECDH key, but
2772 * make sure to clear it out afterwards
2775 field_size = EC_GROUP_get_degree(srvr_group);
2776 if (field_size <= 0)
2778 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2782 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2785 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2790 /* generate master key from the result */
2791 s->session->master_key_length = s->method->ssl3_enc \
2792 -> generate_master_secret(s,
2793 s->session->master_key,
2796 memset(p, 0, n); /* clean up */
2800 /* Send empty client key exch message */
2805 /* First check the size of encoding and
2806 * allocate memory accordingly.
2809 EC_POINT_point2oct(srvr_group,
2810 EC_KEY_get0_public_key(clnt_ecdh),
2811 POINT_CONVERSION_UNCOMPRESSED,
2814 encodedPoint = (unsigned char *)
2815 OPENSSL_malloc(encoded_pt_len *
2816 sizeof(unsigned char));
2817 bn_ctx = BN_CTX_new();
2818 if ((encodedPoint == NULL) ||
2821 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2825 /* Encode the public key */
2826 n = EC_POINT_point2oct(srvr_group,
2827 EC_KEY_get0_public_key(clnt_ecdh),
2828 POINT_CONVERSION_UNCOMPRESSED,
2829 encodedPoint, encoded_pt_len, bn_ctx);
2831 *p = n; /* length of encoded point */
2832 /* Encoded point will be copied here */
2834 /* copy the point */
2835 memcpy((unsigned char *)p, encodedPoint, n);
2836 /* increment n to account for length field */
2840 /* Free allocated memory */
2841 BN_CTX_free(bn_ctx);
2842 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2843 if (clnt_ecdh != NULL)
2844 EC_KEY_free(clnt_ecdh);
2845 EVP_PKEY_free(srvr_pub_pkey);
2847 #endif /* !OPENSSL_NO_ECDH */
2848 else if (alg_k & SSL_kGOST)
2850 /* GOST key exchange message creation */
2851 EVP_PKEY_CTX *pkey_ctx;
2854 unsigned int md_len;
2856 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2857 EVP_MD_CTX *ukm_hash;
2860 /* Get server sertificate PKEY and create ctx from it */
2861 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2863 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2865 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2869 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2870 /* If we have send a certificate, and certificate key
2872 * parameters match those of server certificate, use
2873 * certificate key for key exchange
2876 /* Otherwise, generate ephemeral key pair */
2878 EVP_PKEY_encrypt_init(pkey_ctx);
2879 /* Generate session key */
2880 RAND_bytes(premaster_secret,32);
2881 /* If we have client certificate, use its secret as peer key */
2882 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2883 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2884 /* If there was an error - just ignore it. Ephemeral key
2890 /* Compute shared IV and store it in algorithm-specific
2892 ukm_hash = EVP_MD_CTX_create();
2893 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2894 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2895 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2896 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2897 EVP_MD_CTX_destroy(ukm_hash);
2898 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2900 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2904 /* Make GOST keytransport blob message */
2905 /*Encapsulate it into sequence */
2906 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2908 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2909 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2916 *(p++)= msglen & 0xff;
2921 *(p++)= msglen & 0xff;
2924 memcpy(p, tmp, msglen);
2925 /* Check if pubkey from client certificate was used */
2926 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2928 /* Set flag "skip certificate verify" */
2929 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2931 EVP_PKEY_CTX_free(pkey_ctx);
2932 s->session->master_key_length=
2933 s->method->ssl3_enc->generate_master_secret(s,
2934 s->session->master_key,premaster_secret,32);
2935 EVP_PKEY_free(pub_key);
2938 #ifndef OPENSSL_NO_SRP
2939 else if (alg_k & SSL_kSRP)
2941 if (s->srp_ctx.A != NULL)
2943 /* send off the data */
2944 n=BN_num_bytes(s->srp_ctx.A);
2946 BN_bn2bin(s->srp_ctx.A,p);
2951 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2954 if (s->session->srp_username != NULL)
2955 OPENSSL_free(s->session->srp_username);
2956 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2957 if (s->session->srp_username == NULL)
2959 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2960 ERR_R_MALLOC_FAILURE);
2964 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2966 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2971 #ifndef OPENSSL_NO_PSK
2972 else if (alg_k & SSL_kPSK)
2974 char identity[PSK_MAX_IDENTITY_LEN];
2975 unsigned char *t = NULL;
2976 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2977 unsigned int pre_ms_len = 0, psk_len = 0;
2981 if (s->psk_client_callback == NULL)
2983 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2984 SSL_R_PSK_NO_CLIENT_CB);
2988 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2989 identity, PSK_MAX_IDENTITY_LEN,
2990 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2991 if (psk_len > PSK_MAX_PSK_LEN)
2993 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2994 ERR_R_INTERNAL_ERROR);
2997 else if (psk_len == 0)
2999 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3000 SSL_R_PSK_IDENTITY_NOT_FOUND);
3004 /* create PSK pre_master_secret */
3005 pre_ms_len = 2+psk_len+2+psk_len;
3007 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3009 memset(t, 0, psk_len);
3013 if (s->session->psk_identity_hint != NULL)
3014 OPENSSL_free(s->session->psk_identity_hint);
3015 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3016 if (s->ctx->psk_identity_hint != NULL &&
3017 s->session->psk_identity_hint == NULL)
3019 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3020 ERR_R_MALLOC_FAILURE);
3024 if (s->session->psk_identity != NULL)
3025 OPENSSL_free(s->session->psk_identity);
3026 s->session->psk_identity = BUF_strdup(identity);
3027 if (s->session->psk_identity == NULL)
3029 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3030 ERR_R_MALLOC_FAILURE);
3034 s->session->master_key_length =
3035 s->method->ssl3_enc->generate_master_secret(s,
3036 s->session->master_key,
3037 psk_or_pre_ms, pre_ms_len);
3038 n = strlen(identity);
3040 memcpy(p, identity, n);
3044 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
3045 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3048 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3055 ssl3_send_alert(s, SSL3_AL_FATAL,
3056 SSL_AD_HANDSHAKE_FAILURE);
3057 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3058 ERR_R_INTERNAL_ERROR);
3062 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3063 s->state=SSL3_ST_CW_KEY_EXCH_B;
3066 /* SSL3_ST_CW_KEY_EXCH_B */
3067 return ssl_do_write(s);
3069 #ifndef OPENSSL_NO_ECDH
3070 BN_CTX_free(bn_ctx);
3071 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3072 if (clnt_ecdh != NULL)
3073 EC_KEY_free(clnt_ecdh);
3074 EVP_PKEY_free(srvr_pub_pkey);
3079 int ssl3_send_client_verify(SSL *s)
3082 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3084 EVP_PKEY_CTX *pctx=NULL;
3090 EVP_MD_CTX_init(&mctx);
3092 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3094 p= ssl_handshake_start(s);
3095 pkey=s->cert->key->privatekey;
3096 /* Create context from key and test if sha1 is allowed as digest */
3097 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3098 EVP_PKEY_sign_init(pctx);
3099 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3101 if (!SSL_USE_SIGALGS(s))
3102 s->method->ssl3_enc->cert_verify_mac(s,
3104 &(data[MD5_DIGEST_LENGTH]));
3110 /* For TLS v1.2 send signature algorithm and signature
3111 * using agreed digest and cached handshake records.
3113 if (SSL_USE_SIGALGS(s))
3117 const EVP_MD *md = s->cert->key->digest;
3118 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3120 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3122 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3123 ERR_R_INTERNAL_ERROR);
3128 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3131 if (!EVP_SignInit_ex(&mctx, md, NULL)
3132 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3133 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3135 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3141 if (!ssl3_digest_cached_records(s))
3145 #ifndef OPENSSL_NO_RSA
3146 if (pkey->type == EVP_PKEY_RSA)
3148 s->method->ssl3_enc->cert_verify_mac(s,
3151 if (RSA_sign(NID_md5_sha1, data,
3152 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3153 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3155 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3163 #ifndef OPENSSL_NO_DSA
3164 if (pkey->type == EVP_PKEY_DSA)
3166 if (!DSA_sign(pkey->save_type,
3167 &(data[MD5_DIGEST_LENGTH]),
3168 SHA_DIGEST_LENGTH,&(p[2]),
3169 (unsigned int *)&j,pkey->pkey.dsa))
3171 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3179 #ifndef OPENSSL_NO_ECDSA
3180 if (pkey->type == EVP_PKEY_EC)
3182 if (!ECDSA_sign(pkey->save_type,
3183 &(data[MD5_DIGEST_LENGTH]),
3184 SHA_DIGEST_LENGTH,&(p[2]),
3185 (unsigned int *)&j,pkey->pkey.ec))
3187 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3196 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3198 unsigned char signbuf[64];
3201 s->method->ssl3_enc->cert_verify_mac(s,
3202 NID_id_GostR3411_94,
3204 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3205 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3206 ERR_R_INTERNAL_ERROR);
3209 for (i=63,j=0; i>=0; j++, i--) {
3217 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3220 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3221 s->state=SSL3_ST_CW_CERT_VRFY_B;
3223 EVP_MD_CTX_cleanup(&mctx);
3224 EVP_PKEY_CTX_free(pctx);
3225 return ssl_do_write(s);
3227 EVP_MD_CTX_cleanup(&mctx);
3228 EVP_PKEY_CTX_free(pctx);
3232 /* Check a certificate can be used for client authentication. Currently
3233 * check cert exists, if we have a suitable digest for TLS 1.2 if
3234 * static DH client certificates can be used and optionally checks
3235 * suitability for Suite B.
3237 static int ssl3_check_client_certificate(SSL *s)
3239 unsigned long alg_k;
3240 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3242 /* If no suitable signature algorithm can't use certificate */
3243 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3245 /* If strict mode check suitability of chain before using it.
3246 * This also adjusts suite B digest if necessary.
3248 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3249 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3251 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3252 /* See if we can use client certificate for fixed DH */
3253 if (alg_k & (SSL_kDHr|SSL_kDHd))
3255 SESS_CERT *scert = s->session->sess_cert;
3256 int i = scert->peer_cert_type;
3257 EVP_PKEY *clkey = NULL, *spkey = NULL;
3258 clkey = s->cert->key->privatekey;
3259 /* If client key not DH assume it can be used */
3260 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3263 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3266 /* Compare server and client parameters */
3267 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3268 EVP_PKEY_free(spkey);
3272 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3277 int ssl3_send_client_certificate(SSL *s)
3280 EVP_PKEY *pkey=NULL;
3283 if (s->state == SSL3_ST_CW_CERT_A)
3285 /* Let cert callback update client certificates if required */
3286 if (s->cert->cert_cb)
3288 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3291 s->rwstate=SSL_X509_LOOKUP;
3296 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3299 s->rwstate=SSL_NOTHING;
3301 if (ssl3_check_client_certificate(s))
3302 s->state=SSL3_ST_CW_CERT_C;
3304 s->state=SSL3_ST_CW_CERT_B;
3307 /* We need to get a client cert */
3308 if (s->state == SSL3_ST_CW_CERT_B)
3310 /* If we get an error, we need to
3311 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3312 * We then get retied later */
3314 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3317 s->rwstate=SSL_X509_LOOKUP;
3320 s->rwstate=SSL_NOTHING;
3321 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3323 s->state=SSL3_ST_CW_CERT_B;
3324 if ( !SSL_use_certificate(s,x509) ||
3325 !SSL_use_PrivateKey(s,pkey))
3331 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3334 if (x509 != NULL) X509_free(x509);
3335 if (pkey != NULL) EVP_PKEY_free(pkey);
3336 if (i && !ssl3_check_client_certificate(s))
3340 if (s->version == SSL3_VERSION)
3342 s->s3->tmp.cert_req=0;
3343 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3348 s->s3->tmp.cert_req=2;
3352 /* Ok, we have a cert */
3353 s->state=SSL3_ST_CW_CERT_C;
3356 if (s->state == SSL3_ST_CW_CERT_C)
3358 s->state=SSL3_ST_CW_CERT_D;
3359 ssl3_output_cert_chain(s,
3360 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key);
3362 /* SSL3_ST_CW_CERT_D */
3363 return ssl_do_write(s);
3366 #define has_bits(i,m) (((i)&(m)) == (m))
3368 int ssl3_check_cert_and_algorithm(SSL *s)
3372 EVP_PKEY *pkey=NULL;
3374 #ifndef OPENSSL_NO_RSA
3377 #ifndef OPENSSL_NO_DH
3381 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3382 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3384 /* we don't have a certificate */
3385 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3388 sc=s->session->sess_cert;
3391 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3395 #ifndef OPENSSL_NO_RSA
3396 rsa=s->session->sess_cert->peer_rsa_tmp;
3398 #ifndef OPENSSL_NO_DH
3399 dh=s->session->sess_cert->peer_dh_tmp;
3402 /* This is the passed certificate */
3404 idx=sc->peer_cert_type;
3405 #ifndef OPENSSL_NO_ECDH
3406 if (idx == SSL_PKEY_ECC)
3408 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3410 { /* check failed */
3411 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3419 else if (alg_a & SSL_aECDSA)
3421 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3424 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3426 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3430 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3431 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3432 EVP_PKEY_free(pkey);
3435 /* Check that we have a certificate if we require one */
3436 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3438 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3441 #ifndef OPENSSL_NO_DSA
3442 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3444 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3448 #ifndef OPENSSL_NO_RSA
3449 if ((alg_k & SSL_kRSA) &&
3450 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3452 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3456 #ifndef OPENSSL_NO_DH
3457 if ((alg_k & SSL_kEDH) &&
3458 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3460 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3463 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3464 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3466 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3469 #ifndef OPENSSL_NO_DSA
3470 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3471 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3473 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3479 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3481 #ifndef OPENSSL_NO_RSA
3482 if (alg_k & SSL_kRSA)
3485 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3487 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3493 #ifndef OPENSSL_NO_DH
3494 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3497 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3499 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3506 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3512 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3517 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3518 int ssl3_send_next_proto(SSL *s)
3520 unsigned int len, padding_len;
3523 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3525 len = s->next_proto_negotiated_len;
3526 padding_len = 32 - ((len + 2) % 32);
3527 d = (unsigned char *)s->init_buf->data;
3529 memcpy(d + 5, s->next_proto_negotiated, len);
3530 d[5 + len] = padding_len;
3531 memset(d + 6 + len, 0, padding_len);
3532 *(d++)=SSL3_MT_NEXT_PROTO;
3533 l2n3(2 + len + padding_len, d);
3534 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3535 s->init_num = 4 + 2 + len + padding_len;
3539 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3541 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3543 /* Check to see if handshake is full or resumed. Usually this is just a
3544 * case of checking to see if a cache hit has occurred. In the case of
3545 * session tickets we have to check the next message to be sure.
3548 #ifndef OPENSSL_NO_TLSEXT
3549 int ssl3_check_finished(SSL *s)
3554 /* If we have no ticket it cannot be a resumed session. */
3555 if (!s->session->tlsext_tick)
3557 /* this function is called when we really expect a Certificate
3558 * message, so permit appropriate message length */
3559 n=s->method->ssl_get_message(s,
3565 if (!ok) return((int)n);
3566 s->s3->tmp.reuse_message = 1;
3568 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3569 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3576 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3579 #ifndef OPENSSL_NO_ENGINE
3580 if (s->ctx->client_cert_engine)
3582 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3583 SSL_get_client_CA_list(s),
3584 px509, ppkey, NULL, NULL, NULL);
3589 if (s->ctx->client_cert_cb)
3590 i = s->ctx->client_cert_cb(s,px509,ppkey);