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;
309 s->state=SSL3_ST_CR_CERT_A;
313 case SSL3_ST_CR_CERT_A:
314 case SSL3_ST_CR_CERT_B:
315 #ifndef OPENSSL_NO_TLSEXT
316 ret=ssl3_check_finished(s);
317 if (ret <= 0) goto end;
321 if (s->tlsext_ticket_expected)
322 s->state=SSL3_ST_CR_SESSION_TICKET_A;
324 s->state=SSL3_ST_CR_FINISHED_A;
329 /* Check if it is anon DH/ECDH, SRP auth */
331 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) &&
332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
334 ret=ssl3_get_server_certificate(s);
335 if (ret <= 0) goto end;
336 #ifndef OPENSSL_NO_TLSEXT
337 if (s->tlsext_status_expected)
338 s->state=SSL3_ST_CR_CERT_STATUS_A;
340 s->state=SSL3_ST_CR_KEY_EXCH_A;
345 s->state=SSL3_ST_CR_KEY_EXCH_A;
352 s->state=SSL3_ST_CR_KEY_EXCH_A;
357 case SSL3_ST_CR_KEY_EXCH_A:
358 case SSL3_ST_CR_KEY_EXCH_B:
359 ret=ssl3_get_key_exchange(s);
360 if (ret <= 0) goto end;
361 s->state=SSL3_ST_CR_CERT_REQ_A;
364 /* at this point we check that we have the
365 * required stuff from the server */
366 if (!ssl3_check_cert_and_algorithm(s))
373 case SSL3_ST_CR_CERT_REQ_A:
374 case SSL3_ST_CR_CERT_REQ_B:
375 ret=ssl3_get_certificate_request(s);
376 if (ret <= 0) goto end;
377 s->state=SSL3_ST_CR_SRVR_DONE_A;
381 case SSL3_ST_CR_SRVR_DONE_A:
382 case SSL3_ST_CR_SRVR_DONE_B:
383 ret=ssl3_get_server_done(s);
384 if (ret <= 0) goto end;
385 #ifndef OPENSSL_NO_SRP
386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
388 if ((ret = SRP_Calc_A_param(s))<=0)
390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
396 if (s->s3->tmp.cert_req)
397 s->state=SSL3_ST_CW_CERT_A;
399 s->state=SSL3_ST_CW_KEY_EXCH_A;
404 case SSL3_ST_CW_CERT_A:
405 case SSL3_ST_CW_CERT_B:
406 case SSL3_ST_CW_CERT_C:
407 case SSL3_ST_CW_CERT_D:
408 ret=ssl3_send_client_certificate(s);
409 if (ret <= 0) goto end;
410 s->state=SSL3_ST_CW_KEY_EXCH_A;
414 case SSL3_ST_CW_KEY_EXCH_A:
415 case SSL3_ST_CW_KEY_EXCH_B:
416 ret=ssl3_send_client_key_exchange(s);
417 if (ret <= 0) goto end;
418 /* EAY EAY EAY need to check for DH fix cert
420 /* For TLS, cert_req is set to 2, so a cert chain
421 * of nothing is sent, but no verify packet is sent */
422 /* XXX: For now, we do not support client
423 * authentication in ECDH cipher suites with
424 * ECDH (rather than ECDSA) certificates.
425 * We need to skip the certificate verify
426 * message when client's ECDH public key is sent
427 * inside the client certificate.
429 if (s->s3->tmp.cert_req == 1)
431 s->state=SSL3_ST_CW_CERT_VRFY_A;
435 s->state=SSL3_ST_CW_CHANGE_A;
436 s->s3->change_cipher_spec=0;
438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
440 s->state=SSL3_ST_CW_CHANGE_A;
441 s->s3->change_cipher_spec=0;
447 case SSL3_ST_CW_CERT_VRFY_A:
448 case SSL3_ST_CW_CERT_VRFY_B:
449 ret=ssl3_send_client_verify(s);
450 if (ret <= 0) goto end;
451 s->state=SSL3_ST_CW_CHANGE_A;
453 s->s3->change_cipher_spec=0;
456 case SSL3_ST_CW_CHANGE_A:
457 case SSL3_ST_CW_CHANGE_B:
458 ret=ssl3_send_change_cipher_spec(s,
459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
460 if (ret <= 0) goto end;
462 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
463 s->state=SSL3_ST_CW_FINISHED_A;
465 if (s->s3->next_proto_neg_seen)
466 s->state=SSL3_ST_CW_NEXT_PROTO_A;
468 s->state=SSL3_ST_CW_FINISHED_A;
472 s->session->cipher=s->s3->tmp.new_cipher;
473 #ifdef OPENSSL_NO_COMP
474 s->session->compress_meth=0;
476 if (s->s3->tmp.new_compression == NULL)
477 s->session->compress_meth=0;
479 s->session->compress_meth=
480 s->s3->tmp.new_compression->id;
482 if (!s->method->ssl3_enc->setup_key_block(s))
488 if (!s->method->ssl3_enc->change_cipher_state(s,
489 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
497 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
498 case SSL3_ST_CW_NEXT_PROTO_A:
499 case SSL3_ST_CW_NEXT_PROTO_B:
500 ret=ssl3_send_next_proto(s);
501 if (ret <= 0) goto end;
502 s->state=SSL3_ST_CW_FINISHED_A;
506 case SSL3_ST_CW_FINISHED_A:
507 case SSL3_ST_CW_FINISHED_B:
508 ret=ssl3_send_finished(s,
509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
510 s->method->ssl3_enc->client_finished_label,
511 s->method->ssl3_enc->client_finished_label_len);
512 if (ret <= 0) goto end;
513 s->s3->flags |= SSL3_FLAGS_CCS_OK;
514 s->state=SSL3_ST_CW_FLUSH;
517 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
520 s->s3->tmp.next_state=SSL_ST_OK;
521 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
524 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
525 s->s3->delay_buf_pop_ret=0;
530 #ifndef OPENSSL_NO_TLSEXT
531 /* Allow NewSessionTicket if ticket expected */
532 if (s->tlsext_ticket_expected)
533 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
537 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
542 #ifndef OPENSSL_NO_TLSEXT
543 case SSL3_ST_CR_SESSION_TICKET_A:
544 case SSL3_ST_CR_SESSION_TICKET_B:
545 ret=ssl3_get_new_session_ticket(s);
546 if (ret <= 0) goto end;
547 s->state=SSL3_ST_CR_FINISHED_A;
551 case SSL3_ST_CR_CERT_STATUS_A:
552 case SSL3_ST_CR_CERT_STATUS_B:
553 ret=ssl3_get_cert_status(s);
554 if (ret <= 0) goto end;
555 s->state=SSL3_ST_CR_KEY_EXCH_A;
560 case SSL3_ST_CR_FINISHED_A:
561 case SSL3_ST_CR_FINISHED_B:
563 s->s3->flags |= SSL3_FLAGS_CCS_OK;
564 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
565 SSL3_ST_CR_FINISHED_B);
566 if (ret <= 0) goto end;
569 s->state=SSL3_ST_CW_CHANGE_A;
575 case SSL3_ST_CW_FLUSH:
576 s->rwstate=SSL_WRITING;
577 if (BIO_flush(s->wbio) <= 0)
582 s->rwstate=SSL_NOTHING;
583 s->state=s->s3->tmp.next_state;
587 /* clean a few things up */
588 ssl3_cleanup_key_block(s);
590 if (s->init_buf != NULL)
592 BUF_MEM_free(s->init_buf);
596 /* If we are not 'joining' the last two packets,
597 * remove the buffering now */
598 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
599 ssl_free_wbio_buffer(s);
600 /* else do it later in ssl3_write */
606 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
607 if (s->hit) s->ctx->stats.sess_hit++;
611 s->handshake_func=ssl3_connect;
612 s->ctx->stats.sess_connect_good++;
614 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
620 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
626 /* did we do anything */
627 if (!s->s3->tmp.reuse_message && !skip)
631 if ((ret=BIO_flush(s->wbio)) <= 0)
635 if ((cb != NULL) && (s->state != state))
639 cb(s,SSL_CB_CONNECT_LOOP,1);
650 cb(s,SSL_CB_CONNECT_EXIT,ret);
655 int ssl3_client_hello(SSL *s)
661 #ifndef OPENSSL_NO_COMP
666 buf=(unsigned char *)s->init_buf->data;
667 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
669 SSL_SESSION *sess = s->session;
670 if ((sess == NULL) ||
671 (sess->ssl_version != s->version) ||
672 #ifdef OPENSSL_NO_TLSEXT
673 !sess->session_id_length ||
675 (!sess->session_id_length && !sess->tlsext_tick) ||
677 (sess->not_resumable))
679 if (!ssl_get_new_session(s,0))
682 /* else use the pre-loaded session */
684 p=s->s3->client_random;
686 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
689 /* Do the message type and length last */
692 /* version indicates the negotiated version: for example from
693 * an SSLv2/v3 compatible client hello). The client_version
694 * field is the maximum version we permit and it is also
695 * used in RSA encrypted premaster secrets. Some servers can
696 * choke if we initially report a higher version then
697 * renegotiate to a lower one in the premaster secret. This
698 * didn't happen with TLS 1.0 as most servers supported it
699 * but it can with TLS 1.1 or later if the server only supports
702 * Possible scenario with previous logic:
703 * 1. Client hello indicates TLS 1.2
704 * 2. Server hello says TLS 1.0
705 * 3. RSA encrypted premaster secret uses 1.2.
706 * 4. Handhaked proceeds using TLS 1.0.
707 * 5. Server sends hello request to renegotiate.
708 * 6. Client hello indicates TLS v1.0 as we now
709 * know that is maximum server supports.
710 * 7. Server chokes on RSA encrypted premaster secret
711 * containing version 1.0.
713 * For interoperability it should be OK to always use the
714 * maximum version we support in client hello and then rely
715 * on the checking of version to ensure the servers isn't
716 * being inconsistent: for example initially negotiating with
717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
718 * client_version in client hello and not resetting it to
719 * the negotiated version.
722 *(p++)=s->version>>8;
723 *(p++)=s->version&0xff;
724 s->client_version=s->version;
726 *(p++)=s->client_version>>8;
727 *(p++)=s->client_version&0xff;
731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
738 i=s->session->session_id_length;
742 if (i > (int)sizeof(s->session->session_id))
744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
747 memcpy(p,s->session->session_id,i);
751 /* Ciphers supported */
752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
758 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
759 /* Some servers hang if client hello > 256 bytes
760 * as hack workaround chop number of supported ciphers
761 * to keep it well below this if we use TLS v1.2
763 if (TLS1_get_version(s) >= TLS1_2_VERSION
764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
771 #ifdef OPENSSL_NO_COMP
775 if ((s->options & SSL_OP_NO_COMPRESSION)
776 || !s->ctx->comp_methods)
779 j=sk_SSL_COMP_num(s->ctx->comp_methods);
783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
787 *(p++)=0; /* Add the NULL method */
789 #ifndef OPENSSL_NO_TLSEXT
791 if (ssl_prepare_clienthello_tlsext(s) <= 0)
793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
805 *(d++)=SSL3_MT_CLIENT_HELLO;
808 s->state=SSL3_ST_CW_CLNT_HELLO_B;
809 /* number of bytes to write */
814 /* SSL3_ST_CW_CLNT_HELLO_B */
815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
820 int ssl3_get_server_hello(SSL *s)
822 STACK_OF(SSL_CIPHER) *sk;
828 #ifndef OPENSSL_NO_COMP
832 n=s->method->ssl_get_message(s,
833 SSL3_ST_CR_SRVR_HELLO_A,
834 SSL3_ST_CR_SRVR_HELLO_B,
839 if (!ok) return((int)n);
841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
845 if ( s->d1->send_cookie == 0)
847 s->s3->tmp.reuse_message = 1;
850 else /* already sent a cookie */
852 al=SSL_AD_UNEXPECTED_MESSAGE;
853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
861 al=SSL_AD_UNEXPECTED_MESSAGE;
862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
866 d=p=(unsigned char *)s->init_msg;
868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
871 s->version=(s->version&0xff00)|p[1];
872 al=SSL_AD_PROTOCOL_VERSION;
877 /* load the server hello data */
878 /* load the server random */
879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
882 /* get the session-id */
885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
887 al=SSL_AD_ILLEGAL_PARAMETER;
888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
892 #ifndef OPENSSL_NO_TLSEXT
893 /* check if we want to resume the session based on external pre-shared secret */
894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
896 SSL_CIPHER *pref_cipher=NULL;
897 s->session->master_key_length=sizeof(s->session->master_key);
898 if (s->tls_session_secret_cb(s, s->session->master_key,
899 &s->session->master_key_length,
901 s->tls_session_secret_cb_arg))
903 s->session->cipher = pref_cipher ?
904 pref_cipher : ssl_get_cipher_by_char(s, p+j);
905 s->s3->flags |= SSL3_FLAGS_CCS_OK;
908 #endif /* OPENSSL_NO_TLSEXT */
910 if (j != 0 && j == s->session->session_id_length
911 && memcmp(p,s->session->session_id,j) == 0)
913 if(s->sid_ctx_length != s->session->sid_ctx_length
914 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
916 /* actually a client application bug */
917 al=SSL_AD_ILLEGAL_PARAMETER;
918 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
921 s->s3->flags |= SSL3_FLAGS_CCS_OK;
924 else /* a miss or crap from the other end */
926 /* If we were trying for session-id reuse, make a new
927 * SSL_SESSION so we don't stuff up other people */
929 if (s->session->session_id_length > 0)
931 if (!ssl_get_new_session(s,0))
933 al=SSL_AD_INTERNAL_ERROR;
937 s->session->session_id_length=j;
938 memcpy(s->session->session_id,p,j); /* j could be 0 */
941 c=ssl_get_cipher_by_char(s,p);
945 al=SSL_AD_ILLEGAL_PARAMETER;
946 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
949 /* TLS v1.2 only ciphersuites require v1.2 or later */
950 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
951 (TLS1_get_version(s) < TLS1_2_VERSION))
953 al=SSL_AD_ILLEGAL_PARAMETER;
954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
957 #ifndef OPENSSL_NO_SRP
958 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) &&
959 !(s->srp_ctx.srp_Mask & SSL_kSRP))
961 al=SSL_AD_ILLEGAL_PARAMETER;
962 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
965 #endif /* OPENSSL_NO_SRP */
966 p+=ssl_put_cipher_by_char(s,NULL,NULL);
968 sk=ssl_get_ciphers_by_id(s);
969 i=sk_SSL_CIPHER_find(sk,c);
972 /* we did not say we would use this cipher */
973 al=SSL_AD_ILLEGAL_PARAMETER;
974 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
978 /* Depending on the session caching (internal/external), the cipher
979 and/or cipher_id values may not be set. Make sure that
980 cipher_id is set and use it for comparison. */
981 if (s->session->cipher)
982 s->session->cipher_id = s->session->cipher->id;
983 if (s->hit && (s->session->cipher_id != c->id))
985 /* Workaround is now obsolete */
988 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
991 al=SSL_AD_ILLEGAL_PARAMETER;
992 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
996 s->s3->tmp.new_cipher=c;
997 /* Don't digest cached records if TLS v1.2: we may need them for
998 * client authentication.
1000 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
1002 al = SSL_AD_INTERNAL_ERROR;
1005 /* lets get the compression algorithm */
1007 #ifdef OPENSSL_NO_COMP
1010 al=SSL_AD_ILLEGAL_PARAMETER;
1011 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1014 /* If compression is disabled we'd better not try to resume a session
1015 * using compression.
1017 if (s->session->compress_meth != 0)
1019 al=SSL_AD_INTERNAL_ERROR;
1020 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1025 if (s->hit && j != s->session->compress_meth)
1027 al=SSL_AD_ILLEGAL_PARAMETER;
1028 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1033 else if (s->options & SSL_OP_NO_COMPRESSION)
1035 al=SSL_AD_ILLEGAL_PARAMETER;
1036 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1040 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1042 if ((j != 0) && (comp == NULL))
1044 al=SSL_AD_ILLEGAL_PARAMETER;
1045 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1050 s->s3->tmp.new_compression=comp;
1054 #ifndef OPENSSL_NO_TLSEXT
1056 if (s->version >= SSL3_VERSION)
1058 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1060 /* 'al' set by ssl_parse_serverhello_tlsext */
1061 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1064 if (ssl_check_serverhello_tlsext(s) <= 0)
1066 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1074 /* wrong packet length */
1075 al=SSL_AD_DECODE_ERROR;
1076 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1082 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1087 int ssl3_get_server_certificate(SSL *s)
1089 int al,i,ok,ret= -1;
1090 unsigned long n,nc,llen,l;
1092 const unsigned char *q,*p;
1094 STACK_OF(X509) *sk=NULL;
1096 EVP_PKEY *pkey=NULL;
1097 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1099 n=s->method->ssl_get_message(s,
1106 if (!ok) return((int)n);
1108 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1109 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1110 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1112 s->s3->tmp.reuse_message=1;
1116 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1118 al=SSL_AD_UNEXPECTED_MESSAGE;
1119 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1122 p=d=(unsigned char *)s->init_msg;
1124 if ((sk=sk_X509_new_null()) == NULL)
1126 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1133 al=SSL_AD_DECODE_ERROR;
1134 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1137 for (nc=0; nc<llen; )
1140 if ((l+nc+3) > llen)
1142 al=SSL_AD_DECODE_ERROR;
1143 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1148 x=d2i_X509(NULL,&q,l);
1151 al=SSL_AD_BAD_CERTIFICATE;
1152 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1157 al=SSL_AD_DECODE_ERROR;
1158 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1161 if (!sk_X509_push(sk,x))
1163 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1171 i=ssl_verify_cert_chain(s,sk);
1172 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1173 #ifndef OPENSSL_NO_KRB5
1174 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1175 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1176 #endif /* OPENSSL_NO_KRB5 */
1179 al=ssl_verify_alarm_type(s->verify_result);
1180 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1183 ERR_clear_error(); /* but we keep s->verify_result */
1185 sc=ssl_sess_cert_new();
1186 if (sc == NULL) goto err;
1188 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1189 s->session->sess_cert=sc;
1192 /* Inconsistency alert: cert_chain does include the peer's
1193 * certificate, which we don't include in s3_srvr.c */
1194 x=sk_X509_value(sk,0);
1196 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1198 pkey=X509_get_pubkey(x);
1200 /* VRS: allow null cert if auth == KRB5 */
1201 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1202 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1206 printf("pkey,x = %p, %p\n", pkey,x);
1207 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1208 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1209 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1210 #endif /* KSSL_DEBUG */
1212 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1216 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1217 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1221 i=ssl_cert_type(x,pkey);
1222 if (need_cert && i < 0)
1226 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1227 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1233 sc->peer_cert_type=i;
1234 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1235 /* Why would the following ever happen?
1236 * We just created sc a couple of lines ago. */
1237 if (sc->peer_pkeys[i].x509 != NULL)
1238 X509_free(sc->peer_pkeys[i].x509);
1239 sc->peer_pkeys[i].x509=x;
1240 sc->peer_key= &(sc->peer_pkeys[i]);
1242 if (s->session->peer != NULL)
1243 X509_free(s->session->peer);
1244 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1249 sc->peer_cert_type=i;
1252 if (s->session->peer != NULL)
1253 X509_free(s->session->peer);
1254 s->session->peer=NULL;
1256 s->session->verify_result = s->verify_result;
1264 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1267 EVP_PKEY_free(pkey);
1269 sk_X509_pop_free(sk,X509_free);
1273 int ssl3_get_key_exchange(SSL *s)
1275 #ifndef OPENSSL_NO_RSA
1276 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1279 unsigned char *param,*p;
1281 long i,param_len,n,alg_k,alg_a;
1282 EVP_PKEY *pkey=NULL;
1283 const EVP_MD *md = NULL;
1284 #ifndef OPENSSL_NO_RSA
1287 #ifndef OPENSSL_NO_DH
1290 #ifndef OPENSSL_NO_ECDH
1291 EC_KEY *ecdh = NULL;
1292 BN_CTX *bn_ctx = NULL;
1293 EC_POINT *srvr_ecpoint = NULL;
1295 int encoded_pt_len = 0;
1298 /* use same message size as in ssl3_get_certificate_request()
1299 * as ServerKeyExchange message may be skipped */
1300 n=s->method->ssl_get_message(s,
1301 SSL3_ST_CR_KEY_EXCH_A,
1302 SSL3_ST_CR_KEY_EXCH_B,
1306 if (!ok) return((int)n);
1308 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1310 #ifndef OPENSSL_NO_PSK
1311 /* In plain PSK ciphersuite, ServerKeyExchange can be
1312 omitted if no identity hint is sent. Set
1313 session->sess_cert anyway to avoid problems
1315 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1317 s->session->sess_cert=ssl_sess_cert_new();
1318 if (s->ctx->psk_identity_hint)
1319 OPENSSL_free(s->ctx->psk_identity_hint);
1320 s->ctx->psk_identity_hint = NULL;
1323 s->s3->tmp.reuse_message=1;
1327 param=p=(unsigned char *)s->init_msg;
1328 if (s->session->sess_cert != NULL)
1330 #ifndef OPENSSL_NO_RSA
1331 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1333 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1334 s->session->sess_cert->peer_rsa_tmp=NULL;
1337 #ifndef OPENSSL_NO_DH
1338 if (s->session->sess_cert->peer_dh_tmp)
1340 DH_free(s->session->sess_cert->peer_dh_tmp);
1341 s->session->sess_cert->peer_dh_tmp=NULL;
1344 #ifndef OPENSSL_NO_ECDH
1345 if (s->session->sess_cert->peer_ecdh_tmp)
1347 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1348 s->session->sess_cert->peer_ecdh_tmp=NULL;
1354 s->session->sess_cert=ssl_sess_cert_new();
1357 /* Total length of the parameters including the length prefix */
1360 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1361 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1362 EVP_MD_CTX_init(&md_ctx);
1364 al=SSL_AD_DECODE_ERROR;
1366 #ifndef OPENSSL_NO_PSK
1367 if (alg_k & SSL_kPSK)
1369 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1374 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1375 SSL_R_LENGTH_TOO_SHORT);
1380 /* Store PSK identity hint for later use, hint is used
1381 * in ssl3_send_client_key_exchange. Assume that the
1382 * maximum length of a PSK identity hint can be as
1383 * long as the maximum length of a PSK identity. */
1384 if (i > PSK_MAX_IDENTITY_LEN)
1386 al=SSL_AD_HANDSHAKE_FAILURE;
1387 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1388 SSL_R_DATA_LENGTH_TOO_LONG);
1391 if (i > n - param_len)
1393 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1394 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1399 /* If received PSK identity hint contains NULL
1400 * characters, the hint is truncated from the first
1401 * NULL. p may not be ending with NULL, so create a
1402 * NULL-terminated string. */
1403 memcpy(tmp_id_hint, p, i);
1404 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1405 if (s->ctx->psk_identity_hint != NULL)
1406 OPENSSL_free(s->ctx->psk_identity_hint);
1407 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1408 if (s->ctx->psk_identity_hint == NULL)
1410 al=SSL_AD_HANDSHAKE_FAILURE;
1411 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1419 #endif /* !OPENSSL_NO_PSK */
1420 #ifndef OPENSSL_NO_SRP
1421 if (alg_k & SSL_kSRP)
1426 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1427 SSL_R_LENGTH_TOO_SHORT);
1432 if (i > n - param_len)
1434 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1439 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1441 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1447 if (2 > n - param_len)
1449 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1450 SSL_R_LENGTH_TOO_SHORT);
1457 if (i > n - param_len)
1459 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1464 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1466 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1472 if (1 > n - param_len)
1474 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1475 SSL_R_LENGTH_TOO_SHORT);
1480 i = (unsigned int)(p[0]);
1483 if (i > n - param_len)
1485 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1490 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1492 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1497 if (2 > n - param_len)
1499 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1500 SSL_R_LENGTH_TOO_SHORT);
1507 if (i > n - param_len)
1509 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1514 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1516 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1522 if (!srp_verify_server_param(s, &al))
1524 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1528 /* We must check if there is a certificate */
1529 #ifndef OPENSSL_NO_RSA
1530 if (alg_a & SSL_aRSA)
1531 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1536 #ifndef OPENSSL_NO_DSA
1537 else if (alg_a & SSL_aDSS)
1538 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1542 #endif /* !OPENSSL_NO_SRP */
1543 #ifndef OPENSSL_NO_RSA
1544 if (alg_k & SSL_kRSA)
1546 if ((rsa=RSA_new()) == NULL)
1548 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1555 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1556 SSL_R_LENGTH_TOO_SHORT);
1561 if (i > n - param_len)
1563 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1568 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1570 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1575 if (2 > n - param_len)
1577 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1578 SSL_R_LENGTH_TOO_SHORT);
1585 if (i > n - param_len)
1587 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1592 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1594 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1600 /* this should be because we are using an export cipher */
1601 if (alg_a & SSL_aRSA)
1602 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1605 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1608 s->session->sess_cert->peer_rsa_tmp=rsa;
1611 #else /* OPENSSL_NO_RSA */
1615 #ifndef OPENSSL_NO_DH
1616 else if (alg_k & SSL_kEDH)
1618 if ((dh=DH_new()) == NULL)
1620 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1627 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1628 SSL_R_LENGTH_TOO_SHORT);
1633 if (i > n - param_len)
1635 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1640 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1642 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1647 if (2 > n - param_len)
1649 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1650 SSL_R_LENGTH_TOO_SHORT);
1657 if (i > n - param_len)
1659 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1664 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1666 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1671 if (2 > n - param_len)
1673 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1674 SSL_R_LENGTH_TOO_SHORT);
1681 if (i > n - param_len)
1683 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1688 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1690 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1696 #ifndef OPENSSL_NO_RSA
1697 if (alg_a & SSL_aRSA)
1698 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1703 #ifndef OPENSSL_NO_DSA
1704 else if (alg_a & SSL_aDSS)
1705 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1707 /* else anonymous DH, so no certificate or pkey. */
1709 s->session->sess_cert->peer_dh_tmp=dh;
1712 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1714 al=SSL_AD_ILLEGAL_PARAMETER;
1715 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1718 #endif /* !OPENSSL_NO_DH */
1720 #ifndef OPENSSL_NO_ECDH
1721 else if (alg_k & SSL_kEECDH)
1724 const EC_GROUP *group;
1726 if ((ecdh=EC_KEY_new()) == NULL)
1728 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1732 /* Extract elliptic curve parameters and the
1733 * server's ephemeral ECDH public key.
1734 * Keep accumulating lengths of various components in
1735 * param_len and make sure it never exceeds n.
1738 /* XXX: For now we only support named (not generic) curves
1739 * and the ECParameters in this case is just three bytes. We
1740 * also need one byte for the length of the encoded point
1745 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1746 SSL_R_LENGTH_TOO_SHORT);
1750 if ((*p != NAMED_CURVE_TYPE) ||
1751 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1753 al=SSL_AD_INTERNAL_ERROR;
1754 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1758 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1761 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1764 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1766 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1769 EC_GROUP_free(ngroup);
1771 group = EC_KEY_get0_group(ecdh);
1773 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1774 (EC_GROUP_get_degree(group) > 163))
1776 al=SSL_AD_EXPORT_RESTRICTION;
1777 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1783 /* Next, get the encoded ECPoint */
1784 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1785 ((bn_ctx = BN_CTX_new()) == NULL))
1787 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1791 encoded_pt_len = *p; /* length of encoded point */
1794 if ((encoded_pt_len > n - param_len) ||
1795 (EC_POINT_oct2point(group, srvr_ecpoint,
1796 p, encoded_pt_len, bn_ctx) == 0))
1798 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1801 param_len += encoded_pt_len;
1806 /* The ECC/TLS specification does not mention
1807 * the use of DSA to sign ECParameters in the server
1808 * key exchange message. We do support RSA and ECDSA.
1811 #ifndef OPENSSL_NO_RSA
1812 else if (alg_a & SSL_aRSA)
1813 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1815 #ifndef OPENSSL_NO_ECDSA
1816 else if (alg_a & SSL_aECDSA)
1817 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1819 /* else anonymous ECDH, so no certificate or pkey. */
1820 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1821 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1823 BN_CTX_free(bn_ctx);
1825 EC_POINT_free(srvr_ecpoint);
1826 srvr_ecpoint = NULL;
1830 al=SSL_AD_UNEXPECTED_MESSAGE;
1831 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1834 #endif /* !OPENSSL_NO_ECDH */
1837 /* p points to the next byte, there are 'n' bytes left */
1839 /* if it was signed, check the signature */
1842 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1847 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1848 SSL_R_LENGTH_TOO_SHORT);
1852 sigalg = tls12_get_sigid(pkey);
1853 /* Should never happen */
1856 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1859 /* Check key type is consistent with signature */
1860 if (sigalg != (int)p[1])
1862 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1863 al=SSL_AD_DECODE_ERROR;
1866 md = tls12_get_hash(p[0]);
1869 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1873 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1883 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1884 SSL_R_LENGTH_TOO_SHORT);
1889 j=EVP_PKEY_size(pkey);
1891 /* Check signature length. If n is 0 then signature is empty */
1892 if ((i != n) || (n > j) || (n <= 0))
1894 /* wrong packet length */
1895 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1899 #ifndef OPENSSL_NO_RSA
1900 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1906 for (num=2; num > 0; num--)
1908 EVP_MD_CTX_set_flags(&md_ctx,
1909 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1910 EVP_DigestInit_ex(&md_ctx,(num == 2)
1911 ?s->ctx->md5:s->ctx->sha1, NULL);
1912 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1913 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1914 EVP_DigestUpdate(&md_ctx,param,param_len);
1915 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1919 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1923 al=SSL_AD_DECRYPT_ERROR;
1924 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1930 al=SSL_AD_DECRYPT_ERROR;
1931 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1938 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1939 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1940 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1941 EVP_VerifyUpdate(&md_ctx,param,param_len);
1942 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1945 al=SSL_AD_DECRYPT_ERROR;
1946 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1953 /* aNULL, aSRP or kPSK do not need public keys */
1954 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
1956 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1959 /* still data left over */
1962 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1966 EVP_PKEY_free(pkey);
1967 EVP_MD_CTX_cleanup(&md_ctx);
1970 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1972 EVP_PKEY_free(pkey);
1973 #ifndef OPENSSL_NO_RSA
1977 #ifndef OPENSSL_NO_DH
1981 #ifndef OPENSSL_NO_ECDH
1982 BN_CTX_free(bn_ctx);
1983 EC_POINT_free(srvr_ecpoint);
1987 EVP_MD_CTX_cleanup(&md_ctx);
1991 int ssl3_get_certificate_request(SSL *s)
1994 unsigned long n,nc,l;
1995 unsigned int llen, ctype_num,i;
1997 const unsigned char *p,*q;
1999 STACK_OF(X509_NAME) *ca_sk=NULL;
2001 n=s->method->ssl_get_message(s,
2002 SSL3_ST_CR_CERT_REQ_A,
2003 SSL3_ST_CR_CERT_REQ_B,
2008 if (!ok) return((int)n);
2010 s->s3->tmp.cert_req=0;
2012 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2014 s->s3->tmp.reuse_message=1;
2015 /* If we get here we don't need any cached handshake records
2016 * as we wont be doing client auth.
2018 if (s->s3->handshake_buffer)
2020 if (!ssl3_digest_cached_records(s))
2026 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2028 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2029 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2033 /* TLS does not like anon-DH with client cert */
2034 if (s->version > SSL3_VERSION)
2036 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2038 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2039 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2044 p=d=(unsigned char *)s->init_msg;
2046 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2048 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2052 /* get the certificate types */
2054 if (ctype_num > SSL3_CT_NUMBER)
2055 ctype_num=SSL3_CT_NUMBER;
2056 for (i=0; i<ctype_num; i++)
2057 s->s3->tmp.ctype[i]= p[i];
2059 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2062 /* Check we have enough room for signature algorithms and
2063 * following length value.
2065 if ((unsigned long)(p - d + llen + 2) > n)
2067 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2068 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2071 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
2073 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2074 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2080 /* get the CA RDNs */
2085 out=fopen("/tmp/vsign.der","w");
2086 fwrite(p,1,llen,out);
2091 if ((unsigned long)(p - d + llen) != n)
2093 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2094 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2098 for (nc=0; nc<llen; )
2101 if ((l+nc+2) > llen)
2103 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2104 goto cont; /* netscape bugs */
2105 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2106 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2112 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2114 /* If netscape tolerance is on, ignore errors */
2115 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2119 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2120 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2127 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2128 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2131 if (!sk_X509_NAME_push(ca_sk,xn))
2133 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2147 /* we should setup a certificate to return.... */
2148 s->s3->tmp.cert_req=1;
2149 s->s3->tmp.ctype_num=ctype_num;
2150 if (s->s3->tmp.ca_names != NULL)
2151 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2152 s->s3->tmp.ca_names=ca_sk;
2157 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2161 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2163 return(X509_NAME_cmp(*a,*b));
2165 #ifndef OPENSSL_NO_TLSEXT
2166 int ssl3_get_new_session_ticket(SSL *s)
2168 int ok,al,ret=0, ticklen;
2170 const unsigned char *p;
2173 n=s->method->ssl_get_message(s,
2174 SSL3_ST_CR_SESSION_TICKET_A,
2175 SSL3_ST_CR_SESSION_TICKET_B,
2183 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2185 s->s3->tmp.reuse_message=1;
2188 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2190 al=SSL_AD_UNEXPECTED_MESSAGE;
2191 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2196 /* need at least ticket_lifetime_hint + ticket length */
2197 al = SSL_AD_DECODE_ERROR;
2198 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2202 p=d=(unsigned char *)s->init_msg;
2203 n2l(p, s->session->tlsext_tick_lifetime_hint);
2205 /* ticket_lifetime_hint + ticket_length + ticket */
2206 if (ticklen + 6 != n)
2208 al = SSL_AD_DECODE_ERROR;
2209 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2212 if (s->session->tlsext_tick)
2214 OPENSSL_free(s->session->tlsext_tick);
2215 s->session->tlsext_ticklen = 0;
2217 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2218 if (!s->session->tlsext_tick)
2220 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2223 memcpy(s->session->tlsext_tick, p, ticklen);
2224 s->session->tlsext_ticklen = ticklen;
2225 /* There are two ways to detect a resumed ticket sesion.
2226 * One is to set an appropriate session ID and then the server
2227 * must return a match in ServerHello. This allows the normal
2228 * client session ID matching to work and we know much
2229 * earlier that the ticket has been accepted.
2231 * The other way is to set zero length session ID when the
2232 * ticket is presented and rely on the handshake to determine
2233 * session resumption.
2235 * We choose the former approach because this fits in with
2236 * assumptions elsewhere in OpenSSL. The session ID is set
2237 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2240 EVP_Digest(p, ticklen,
2241 s->session->session_id, &s->session->session_id_length,
2242 #ifndef OPENSSL_NO_SHA256
2243 EVP_sha256(), NULL);
2250 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2255 int ssl3_get_cert_status(SSL *s)
2258 unsigned long resplen,n;
2259 const unsigned char *p;
2261 n=s->method->ssl_get_message(s,
2262 SSL3_ST_CR_CERT_STATUS_A,
2263 SSL3_ST_CR_CERT_STATUS_B,
2264 SSL3_MT_CERTIFICATE_STATUS,
2268 if (!ok) return((int)n);
2271 /* need at least status type + length */
2272 al = SSL_AD_DECODE_ERROR;
2273 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2276 p = (unsigned char *)s->init_msg;
2277 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2279 al = SSL_AD_DECODE_ERROR;
2280 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2284 if (resplen + 4 != n)
2286 al = SSL_AD_DECODE_ERROR;
2287 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2290 if (s->tlsext_ocsp_resp)
2291 OPENSSL_free(s->tlsext_ocsp_resp);
2292 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2293 if (!s->tlsext_ocsp_resp)
2295 al = SSL_AD_INTERNAL_ERROR;
2296 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2299 s->tlsext_ocsp_resplen = resplen;
2300 if (s->ctx->tlsext_status_cb)
2303 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2306 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2307 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2312 al = SSL_AD_INTERNAL_ERROR;
2313 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2319 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2324 int ssl3_get_server_done(SSL *s)
2329 n=s->method->ssl_get_message(s,
2330 SSL3_ST_CR_SRVR_DONE_A,
2331 SSL3_ST_CR_SRVR_DONE_B,
2332 SSL3_MT_SERVER_DONE,
2333 30, /* should be very small, like 0 :-) */
2336 if (!ok) return((int)n);
2339 /* should contain no data */
2340 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2341 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2349 int ssl3_send_client_key_exchange(SSL *s)
2351 unsigned char *p,*d;
2353 unsigned long alg_k;
2354 #ifndef OPENSSL_NO_RSA
2356 EVP_PKEY *pkey=NULL;
2358 #ifndef OPENSSL_NO_KRB5
2360 #endif /* OPENSSL_NO_KRB5 */
2361 #ifndef OPENSSL_NO_ECDH
2362 EC_KEY *clnt_ecdh = NULL;
2363 const EC_POINT *srvr_ecpoint = NULL;
2364 EVP_PKEY *srvr_pub_pkey = NULL;
2365 unsigned char *encodedPoint = NULL;
2366 int encoded_pt_len = 0;
2367 BN_CTX * bn_ctx = NULL;
2370 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2372 d=(unsigned char *)s->init_buf->data;
2375 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2377 /* Fool emacs indentation */
2379 #ifndef OPENSSL_NO_RSA
2380 else if (alg_k & SSL_kRSA)
2383 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2385 if (s->session->sess_cert == NULL)
2387 /* We should always have a server certificate with SSL_kRSA. */
2388 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2392 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2393 rsa=s->session->sess_cert->peer_rsa_tmp;
2396 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2397 if ((pkey == NULL) ||
2398 (pkey->type != EVP_PKEY_RSA) ||
2399 (pkey->pkey.rsa == NULL))
2401 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2405 EVP_PKEY_free(pkey);
2408 tmp_buf[0]=s->client_version>>8;
2409 tmp_buf[1]=s->client_version&0xff;
2410 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2413 s->session->master_key_length=sizeof tmp_buf;
2416 /* Fix buf for TLS and beyond */
2417 if (s->version > SSL3_VERSION)
2419 n=RSA_public_encrypt(sizeof tmp_buf,
2420 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2422 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2423 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2427 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2431 /* Fix buf for TLS and beyond */
2432 if (s->version > SSL3_VERSION)
2438 s->session->master_key_length=
2439 s->method->ssl3_enc->generate_master_secret(s,
2440 s->session->master_key,
2441 tmp_buf,sizeof tmp_buf);
2442 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2445 #ifndef OPENSSL_NO_KRB5
2446 else if (alg_k & SSL_kKRB5)
2448 krb5_error_code krb5rc;
2449 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2450 /* krb5_data krb5_ap_req; */
2451 krb5_data *enc_ticket;
2452 krb5_data authenticator, *authp = NULL;
2453 EVP_CIPHER_CTX ciph_ctx;
2454 const EVP_CIPHER *enc = NULL;
2455 unsigned char iv[EVP_MAX_IV_LENGTH];
2456 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2457 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2458 + EVP_MAX_IV_LENGTH];
2459 int padl, outl = sizeof(epms);
2461 EVP_CIPHER_CTX_init(&ciph_ctx);
2464 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2466 #endif /* KSSL_DEBUG */
2470 if (KRB5SENDAUTH) authp = &authenticator;
2471 #endif /* KRB5SENDAUTH */
2473 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2475 enc = kssl_map_enc(kssl_ctx->enctype);
2480 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2481 if (krb5rc && kssl_err.text)
2482 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2484 #endif /* KSSL_DEBUG */
2488 ssl3_send_alert(s,SSL3_AL_FATAL,
2489 SSL_AD_HANDSHAKE_FAILURE);
2490 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2495 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2496 ** in place of RFC 2712 KerberosWrapper, as in:
2498 ** Send ticket (copy to *p, set n = length)
2499 ** n = krb5_ap_req.length;
2500 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2501 ** if (krb5_ap_req.data)
2502 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2504 ** Now using real RFC 2712 KerberosWrapper
2505 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2506 ** Note: 2712 "opaque" types are here replaced
2507 ** with a 2-byte length followed by the value.
2509 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2510 ** Where "xx xx" = length bytes. Shown here with
2511 ** optional authenticator omitted.
2514 /* KerberosWrapper.Ticket */
2515 s2n(enc_ticket->length,p);
2516 memcpy(p, enc_ticket->data, enc_ticket->length);
2517 p+= enc_ticket->length;
2518 n = enc_ticket->length + 2;
2520 /* KerberosWrapper.Authenticator */
2521 if (authp && authp->length)
2523 s2n(authp->length,p);
2524 memcpy(p, authp->data, authp->length);
2526 n+= authp->length + 2;
2534 s2n(0,p);/* null authenticator length */
2538 tmp_buf[0]=s->client_version>>8;
2539 tmp_buf[1]=s->client_version&0xff;
2540 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2543 /* 20010420 VRS. Tried it this way; failed.
2544 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2545 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2546 ** kssl_ctx->length);
2547 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2550 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2551 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2553 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2555 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2557 if (outl > (int)sizeof epms)
2559 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2562 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2564 /* KerberosWrapper.EncryptedPreMasterSecret */
2566 memcpy(p, epms, outl);
2570 s->session->master_key_length=
2571 s->method->ssl3_enc->generate_master_secret(s,
2572 s->session->master_key,
2573 tmp_buf, sizeof tmp_buf);
2575 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2576 OPENSSL_cleanse(epms, outl);
2579 #ifndef OPENSSL_NO_DH
2580 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2582 DH *dh_srvr,*dh_clnt;
2584 if (s->session->sess_cert == NULL)
2586 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2587 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2591 if (s->session->sess_cert->peer_dh_tmp != NULL)
2592 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2595 /* we get them from the cert */
2596 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2597 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2601 /* generate a new random key */
2602 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2604 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2607 if (!DH_generate_key(dh_clnt))
2609 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2614 /* use the 'p' output buffer for the DH key, but
2615 * make sure to clear it out afterwards */
2617 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2621 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2626 /* generate master key from the result */
2627 s->session->master_key_length=
2628 s->method->ssl3_enc->generate_master_secret(s,
2629 s->session->master_key,p,n);
2633 /* send off the data */
2634 n=BN_num_bytes(dh_clnt->pub_key);
2636 BN_bn2bin(dh_clnt->pub_key,p);
2641 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2645 #ifndef OPENSSL_NO_ECDH
2646 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2648 const EC_GROUP *srvr_group = NULL;
2650 int ecdh_clnt_cert = 0;
2653 if (s->session->sess_cert == NULL)
2655 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2656 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2660 /* Did we send out the client's
2661 * ECDH share for use in premaster
2662 * computation as part of client certificate?
2663 * If so, set ecdh_clnt_cert to 1.
2665 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2667 /* XXX: For now, we do not support client
2668 * authentication using ECDH certificates.
2669 * To add such support, one needs to add
2670 * code that checks for appropriate
2671 * conditions and sets ecdh_clnt_cert to 1.
2672 * For example, the cert have an ECC
2673 * key on the same curve as the server's
2674 * and the key should be authorized for
2677 * One also needs to add code in ssl3_connect
2678 * to skip sending the certificate verify
2681 * if ((s->cert->key->privatekey != NULL) &&
2682 * (s->cert->key->privatekey->type ==
2683 * EVP_PKEY_EC) && ...)
2684 * ecdh_clnt_cert = 1;
2688 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2690 tkey = s->session->sess_cert->peer_ecdh_tmp;
2694 /* Get the Server Public Key from Cert */
2695 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2696 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2697 if ((srvr_pub_pkey == NULL) ||
2698 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2699 (srvr_pub_pkey->pkey.ec == NULL))
2701 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2702 ERR_R_INTERNAL_ERROR);
2706 tkey = srvr_pub_pkey->pkey.ec;
2709 srvr_group = EC_KEY_get0_group(tkey);
2710 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2712 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2714 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2715 ERR_R_INTERNAL_ERROR);
2719 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2721 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2725 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2727 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2732 /* Reuse key info from our certificate
2733 * We only need our private key to perform
2734 * the ECDH computation.
2736 const BIGNUM *priv_key;
2737 tkey = s->cert->key->privatekey->pkey.ec;
2738 priv_key = EC_KEY_get0_private_key(tkey);
2739 if (priv_key == NULL)
2741 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2744 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2746 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2752 /* Generate a new ECDH key pair */
2753 if (!(EC_KEY_generate_key(clnt_ecdh)))
2755 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2760 /* use the 'p' output buffer for the ECDH key, but
2761 * make sure to clear it out afterwards
2764 field_size = EC_GROUP_get_degree(srvr_group);
2765 if (field_size <= 0)
2767 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2771 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2774 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2779 /* generate master key from the result */
2780 s->session->master_key_length = s->method->ssl3_enc \
2781 -> generate_master_secret(s,
2782 s->session->master_key,
2785 memset(p, 0, n); /* clean up */
2789 /* Send empty client key exch message */
2794 /* First check the size of encoding and
2795 * allocate memory accordingly.
2798 EC_POINT_point2oct(srvr_group,
2799 EC_KEY_get0_public_key(clnt_ecdh),
2800 POINT_CONVERSION_UNCOMPRESSED,
2803 encodedPoint = (unsigned char *)
2804 OPENSSL_malloc(encoded_pt_len *
2805 sizeof(unsigned char));
2806 bn_ctx = BN_CTX_new();
2807 if ((encodedPoint == NULL) ||
2810 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2814 /* Encode the public key */
2815 n = EC_POINT_point2oct(srvr_group,
2816 EC_KEY_get0_public_key(clnt_ecdh),
2817 POINT_CONVERSION_UNCOMPRESSED,
2818 encodedPoint, encoded_pt_len, bn_ctx);
2820 *p = n; /* length of encoded point */
2821 /* Encoded point will be copied here */
2823 /* copy the point */
2824 memcpy((unsigned char *)p, encodedPoint, n);
2825 /* increment n to account for length field */
2829 /* Free allocated memory */
2830 BN_CTX_free(bn_ctx);
2831 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2832 if (clnt_ecdh != NULL)
2833 EC_KEY_free(clnt_ecdh);
2834 EVP_PKEY_free(srvr_pub_pkey);
2836 #endif /* !OPENSSL_NO_ECDH */
2837 else if (alg_k & SSL_kGOST)
2839 /* GOST key exchange message creation */
2840 EVP_PKEY_CTX *pkey_ctx;
2843 unsigned int md_len;
2845 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2846 EVP_MD_CTX *ukm_hash;
2849 /* Get server sertificate PKEY and create ctx from it */
2850 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2852 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2854 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2858 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2859 /* If we have send a certificate, and certificate key
2861 * parameters match those of server certificate, use
2862 * certificate key for key exchange
2865 /* Otherwise, generate ephemeral key pair */
2867 EVP_PKEY_encrypt_init(pkey_ctx);
2868 /* Generate session key */
2869 RAND_bytes(premaster_secret,32);
2870 /* If we have client certificate, use its secret as peer key */
2871 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2872 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2873 /* If there was an error - just ignore it. Ephemeral key
2879 /* Compute shared IV and store it in algorithm-specific
2881 ukm_hash = EVP_MD_CTX_create();
2882 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2883 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2884 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2885 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2886 EVP_MD_CTX_destroy(ukm_hash);
2887 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2889 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2893 /* Make GOST keytransport blob message */
2894 /*Encapsulate it into sequence */
2895 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2897 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2898 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2905 *(p++)= msglen & 0xff;
2910 *(p++)= msglen & 0xff;
2913 memcpy(p, tmp, msglen);
2914 /* Check if pubkey from client certificate was used */
2915 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2917 /* Set flag "skip certificate verify" */
2918 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2920 EVP_PKEY_CTX_free(pkey_ctx);
2921 s->session->master_key_length=
2922 s->method->ssl3_enc->generate_master_secret(s,
2923 s->session->master_key,premaster_secret,32);
2924 EVP_PKEY_free(pub_key);
2927 #ifndef OPENSSL_NO_SRP
2928 else if (alg_k & SSL_kSRP)
2930 if (s->srp_ctx.A != NULL)
2932 /* send off the data */
2933 n=BN_num_bytes(s->srp_ctx.A);
2935 BN_bn2bin(s->srp_ctx.A,p);
2940 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2943 if (s->session->srp_username != NULL)
2944 OPENSSL_free(s->session->srp_username);
2945 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2946 if (s->session->srp_username == NULL)
2948 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2949 ERR_R_MALLOC_FAILURE);
2953 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2955 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2960 #ifndef OPENSSL_NO_PSK
2961 else if (alg_k & SSL_kPSK)
2963 char identity[PSK_MAX_IDENTITY_LEN];
2964 unsigned char *t = NULL;
2965 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2966 unsigned int pre_ms_len = 0, psk_len = 0;
2970 if (s->psk_client_callback == NULL)
2972 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2973 SSL_R_PSK_NO_CLIENT_CB);
2977 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2978 identity, PSK_MAX_IDENTITY_LEN,
2979 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2980 if (psk_len > PSK_MAX_PSK_LEN)
2982 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2983 ERR_R_INTERNAL_ERROR);
2986 else if (psk_len == 0)
2988 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2989 SSL_R_PSK_IDENTITY_NOT_FOUND);
2993 /* create PSK pre_master_secret */
2994 pre_ms_len = 2+psk_len+2+psk_len;
2996 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2998 memset(t, 0, psk_len);
3002 if (s->session->psk_identity_hint != NULL)
3003 OPENSSL_free(s->session->psk_identity_hint);
3004 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3005 if (s->ctx->psk_identity_hint != NULL &&
3006 s->session->psk_identity_hint == NULL)
3008 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3009 ERR_R_MALLOC_FAILURE);
3013 if (s->session->psk_identity != NULL)
3014 OPENSSL_free(s->session->psk_identity);
3015 s->session->psk_identity = BUF_strdup(identity);
3016 if (s->session->psk_identity == NULL)
3018 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3019 ERR_R_MALLOC_FAILURE);
3023 s->session->master_key_length =
3024 s->method->ssl3_enc->generate_master_secret(s,
3025 s->session->master_key,
3026 psk_or_pre_ms, pre_ms_len);
3027 n = strlen(identity);
3029 memcpy(p, identity, n);
3033 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
3034 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3037 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3044 ssl3_send_alert(s, SSL3_AL_FATAL,
3045 SSL_AD_HANDSHAKE_FAILURE);
3046 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3047 ERR_R_INTERNAL_ERROR);
3051 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
3054 s->state=SSL3_ST_CW_KEY_EXCH_B;
3055 /* number of bytes to write */
3060 /* SSL3_ST_CW_KEY_EXCH_B */
3061 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3063 #ifndef OPENSSL_NO_ECDH
3064 BN_CTX_free(bn_ctx);
3065 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3066 if (clnt_ecdh != NULL)
3067 EC_KEY_free(clnt_ecdh);
3068 EVP_PKEY_free(srvr_pub_pkey);
3073 int ssl3_send_client_verify(SSL *s)
3075 unsigned char *p,*d;
3076 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3078 EVP_PKEY_CTX *pctx=NULL;
3084 EVP_MD_CTX_init(&mctx);
3086 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3088 d=(unsigned char *)s->init_buf->data;
3090 pkey=s->cert->key->privatekey;
3091 /* Create context from key and test if sha1 is allowed as digest */
3092 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3093 EVP_PKEY_sign_init(pctx);
3094 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3096 if (TLS1_get_version(s) < TLS1_2_VERSION)
3097 s->method->ssl3_enc->cert_verify_mac(s,
3099 &(data[MD5_DIGEST_LENGTH]));
3105 /* For TLS v1.2 send signature algorithm and signature
3106 * using agreed digest and cached handshake records.
3108 if (TLS1_get_version(s) >= TLS1_2_VERSION)
3112 const EVP_MD *md = s->cert->key->digest;
3113 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3115 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3117 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3118 ERR_R_INTERNAL_ERROR);
3123 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3126 if (!EVP_SignInit_ex(&mctx, md, NULL)
3127 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3128 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3130 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3136 if (!ssl3_digest_cached_records(s))
3140 #ifndef OPENSSL_NO_RSA
3141 if (pkey->type == EVP_PKEY_RSA)
3143 s->method->ssl3_enc->cert_verify_mac(s,
3146 if (RSA_sign(NID_md5_sha1, data,
3147 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3148 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3150 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3158 #ifndef OPENSSL_NO_DSA
3159 if (pkey->type == EVP_PKEY_DSA)
3161 if (!DSA_sign(pkey->save_type,
3162 &(data[MD5_DIGEST_LENGTH]),
3163 SHA_DIGEST_LENGTH,&(p[2]),
3164 (unsigned int *)&j,pkey->pkey.dsa))
3166 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3174 #ifndef OPENSSL_NO_ECDSA
3175 if (pkey->type == EVP_PKEY_EC)
3177 if (!ECDSA_sign(pkey->save_type,
3178 &(data[MD5_DIGEST_LENGTH]),
3179 SHA_DIGEST_LENGTH,&(p[2]),
3180 (unsigned int *)&j,pkey->pkey.ec))
3182 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3191 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3193 unsigned char signbuf[64];
3196 s->method->ssl3_enc->cert_verify_mac(s,
3197 NID_id_GostR3411_94,
3199 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3200 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3201 ERR_R_INTERNAL_ERROR);
3204 for (i=63,j=0; i>=0; j++, i--) {
3212 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3215 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3218 s->state=SSL3_ST_CW_CERT_VRFY_B;
3219 s->init_num=(int)n+4;
3222 EVP_MD_CTX_cleanup(&mctx);
3223 EVP_PKEY_CTX_free(pctx);
3224 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3226 EVP_MD_CTX_cleanup(&mctx);
3227 EVP_PKEY_CTX_free(pctx);
3231 int ssl3_send_client_certificate(SSL *s)
3234 EVP_PKEY *pkey=NULL;
3238 if (s->state == SSL3_ST_CW_CERT_A)
3240 if ((s->cert == NULL) ||
3241 (s->cert->key->x509 == NULL) ||
3242 (s->cert->key->privatekey == NULL))
3243 s->state=SSL3_ST_CW_CERT_B;
3245 s->state=SSL3_ST_CW_CERT_C;
3248 /* We need to get a client cert */
3249 if (s->state == SSL3_ST_CW_CERT_B)
3251 /* If we get an error, we need to
3252 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3253 * We then get retied later */
3255 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3258 s->rwstate=SSL_X509_LOOKUP;
3261 s->rwstate=SSL_NOTHING;
3262 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3264 s->state=SSL3_ST_CW_CERT_B;
3265 if ( !SSL_use_certificate(s,x509) ||
3266 !SSL_use_PrivateKey(s,pkey))
3272 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3275 if (x509 != NULL) X509_free(x509);
3276 if (pkey != NULL) EVP_PKEY_free(pkey);
3279 if (s->version == SSL3_VERSION)
3281 s->s3->tmp.cert_req=0;
3282 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3287 s->s3->tmp.cert_req=2;
3291 /* Ok, we have a cert */
3292 s->state=SSL3_ST_CW_CERT_C;
3295 if (s->state == SSL3_ST_CW_CERT_C)
3297 s->state=SSL3_ST_CW_CERT_D;
3298 l=ssl3_output_cert_chain(s,
3299 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3303 /* SSL3_ST_CW_CERT_D */
3304 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3307 #define has_bits(i,m) (((i)&(m)) == (m))
3309 int ssl3_check_cert_and_algorithm(SSL *s)
3313 EVP_PKEY *pkey=NULL;
3315 #ifndef OPENSSL_NO_RSA
3318 #ifndef OPENSSL_NO_DH
3322 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3323 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3325 /* we don't have a certificate */
3326 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3329 sc=s->session->sess_cert;
3332 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3336 #ifndef OPENSSL_NO_RSA
3337 rsa=s->session->sess_cert->peer_rsa_tmp;
3339 #ifndef OPENSSL_NO_DH
3340 dh=s->session->sess_cert->peer_dh_tmp;
3343 /* This is the passed certificate */
3345 idx=sc->peer_cert_type;
3346 #ifndef OPENSSL_NO_ECDH
3347 if (idx == SSL_PKEY_ECC)
3349 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3351 { /* check failed */
3352 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3361 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3362 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3363 EVP_PKEY_free(pkey);
3366 /* Check that we have a certificate if we require one */
3367 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3369 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3372 #ifndef OPENSSL_NO_DSA
3373 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3375 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3379 #ifndef OPENSSL_NO_RSA
3380 if ((alg_k & SSL_kRSA) &&
3381 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3383 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3387 #ifndef OPENSSL_NO_DH
3388 if ((alg_k & SSL_kEDH) &&
3389 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3391 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3394 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3396 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3399 #ifndef OPENSSL_NO_DSA
3400 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3402 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3408 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3410 #ifndef OPENSSL_NO_RSA
3411 if (alg_k & SSL_kRSA)
3414 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3416 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3422 #ifndef OPENSSL_NO_DH
3423 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3426 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3428 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3435 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3441 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3446 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3447 int ssl3_send_next_proto(SSL *s)
3449 unsigned int len, padding_len;
3452 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3454 len = s->next_proto_negotiated_len;
3455 padding_len = 32 - ((len + 2) % 32);
3456 d = (unsigned char *)s->init_buf->data;
3458 memcpy(d + 5, s->next_proto_negotiated, len);
3459 d[5 + len] = padding_len;
3460 memset(d + 6 + len, 0, padding_len);
3461 *(d++)=SSL3_MT_NEXT_PROTO;
3462 l2n3(2 + len + padding_len, d);
3463 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3464 s->init_num = 4 + 2 + len + padding_len;
3468 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3470 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3472 /* Check to see if handshake is full or resumed. Usually this is just a
3473 * case of checking to see if a cache hit has occurred. In the case of
3474 * session tickets we have to check the next message to be sure.
3477 #ifndef OPENSSL_NO_TLSEXT
3478 int ssl3_check_finished(SSL *s)
3482 /* If we have no ticket it cannot be a resumed session. */
3483 if (!s->session->tlsext_tick)
3485 /* this function is called when we really expect a Certificate
3486 * message, so permit appropriate message length */
3487 n=s->method->ssl_get_message(s,
3493 if (!ok) return((int)n);
3494 s->s3->tmp.reuse_message = 1;
3495 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3496 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3503 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3506 #ifndef OPENSSL_NO_ENGINE
3507 if (s->ctx->client_cert_engine)
3509 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3510 SSL_get_client_CA_list(s),
3511 px509, ppkey, NULL, NULL, NULL);
3516 if (s->ctx->client_cert_cb)
3517 i = s->ctx->client_cert_cb(s,px509,ppkey);