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>
159 #ifndef OPENSSL_NO_DH
160 #include <openssl/dh.h>
162 #include <openssl/bn.h>
163 #ifndef OPENSSL_NO_ENGINE
164 #include <openssl/engine.h>
167 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
169 #ifndef OPENSSL_NO_SSL3_METHOD
170 static const SSL_METHOD *ssl3_get_client_method(int ver)
172 if (ver == SSL3_VERSION)
173 return(SSLv3_client_method());
178 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
179 ssl_undefined_function,
181 ssl3_get_client_method)
184 int ssl3_connect(SSL *s)
187 unsigned long Time=(unsigned long)time(NULL);
188 void (*cb)(const SSL *ssl,int type,int val)=NULL;
190 int new_state,state,skip=0;
192 RAND_add(&Time,sizeof(Time),0);
196 if (s->info_callback != NULL)
198 else if (s->ctx->info_callback != NULL)
199 cb=s->ctx->info_callback;
202 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
204 #ifndef OPENSSL_NO_HEARTBEATS
205 /* If we're awaiting a HeartbeatResponse, pretend we
206 * already got and don't await it anymore, because
207 * Heartbeats don't make sense during handshakes anyway.
209 if (s->tlsext_hb_pending)
211 s->tlsext_hb_pending = 0;
222 case SSL_ST_RENEGOTIATE:
224 s->state=SSL_ST_CONNECT;
225 s->ctx->stats.sess_connect_renegotiate++;
229 case SSL_ST_BEFORE|SSL_ST_CONNECT:
230 case SSL_ST_OK|SSL_ST_CONNECT:
233 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
235 if ((s->version & 0xff00 ) != 0x0300)
237 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
242 if (!ssl_security(s, SSL_SECOP_VERSION, 0,
245 SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW);
249 /* s->version=SSL3_VERSION; */
250 s->type=SSL_ST_CONNECT;
252 if (s->init_buf == NULL)
254 if ((buf=BUF_MEM_new()) == NULL)
259 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
268 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
270 /* setup buffing BIO */
271 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
273 /* don't push the buffering BIO quite yet */
275 ssl3_init_finished_mac(s);
277 s->state=SSL3_ST_CW_CLNT_HELLO_A;
278 s->ctx->stats.sess_connect++;
280 s->s3->flags &= ~SSL3_FLAGS_CCS_OK;
281 /* Should have been reset by ssl3_get_finished, too. */
282 s->s3->change_cipher_spec = 0;
285 case SSL3_ST_CW_CLNT_HELLO_A:
286 case SSL3_ST_CW_CLNT_HELLO_B:
289 ret=ssl3_client_hello(s);
290 if (ret <= 0) goto end;
291 s->state=SSL3_ST_CR_SRVR_HELLO_A;
294 /* turn on buffering for the next lot of output */
295 if (s->bbio != s->wbio)
296 s->wbio=BIO_push(s->bbio,s->wbio);
300 case SSL3_ST_CR_SRVR_HELLO_A:
301 case SSL3_ST_CR_SRVR_HELLO_B:
302 ret=ssl3_get_server_hello(s);
303 if (ret <= 0) goto end;
307 s->state=SSL3_ST_CR_FINISHED_A;
308 #ifndef OPENSSL_NO_TLSEXT
309 if (s->tlsext_ticket_expected)
311 /* receive renewed session ticket */
312 s->state=SSL3_ST_CR_SESSION_TICKET_A;
318 s->state=SSL3_ST_CR_CERT_A;
322 case SSL3_ST_CR_CERT_A:
323 case SSL3_ST_CR_CERT_B:
324 /* Check if it is anon DH/ECDH, SRP auth */
326 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) &&
327 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
329 ret=ssl3_get_server_certificate(s);
330 if (ret <= 0) goto end;
331 #ifndef OPENSSL_NO_TLSEXT
332 if (s->tlsext_status_expected)
333 s->state=SSL3_ST_CR_CERT_STATUS_A;
335 s->state=SSL3_ST_CR_KEY_EXCH_A;
340 s->state=SSL3_ST_CR_KEY_EXCH_A;
347 s->state=SSL3_ST_CR_KEY_EXCH_A;
352 case SSL3_ST_CR_KEY_EXCH_A:
353 case SSL3_ST_CR_KEY_EXCH_B:
354 ret=ssl3_get_key_exchange(s);
355 if (ret <= 0) goto end;
356 s->state=SSL3_ST_CR_CERT_REQ_A;
359 /* at this point we check that we have the
360 * required stuff from the server */
361 if (!ssl3_check_cert_and_algorithm(s))
368 case SSL3_ST_CR_CERT_REQ_A:
369 case SSL3_ST_CR_CERT_REQ_B:
370 ret=ssl3_get_certificate_request(s);
371 if (ret <= 0) goto end;
372 s->state=SSL3_ST_CR_SRVR_DONE_A;
376 case SSL3_ST_CR_SRVR_DONE_A:
377 case SSL3_ST_CR_SRVR_DONE_B:
378 ret=ssl3_get_server_done(s);
379 if (ret <= 0) goto end;
380 #ifndef OPENSSL_NO_SRP
381 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
383 if ((ret = SRP_Calc_A_param(s))<=0)
385 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
386 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
391 if (s->s3->tmp.cert_req)
392 s->state=SSL3_ST_CW_CERT_A;
394 s->state=SSL3_ST_CW_KEY_EXCH_A;
399 case SSL3_ST_CW_CERT_A:
400 case SSL3_ST_CW_CERT_B:
401 case SSL3_ST_CW_CERT_C:
402 case SSL3_ST_CW_CERT_D:
403 ret=ssl3_send_client_certificate(s);
404 if (ret <= 0) goto end;
405 s->state=SSL3_ST_CW_KEY_EXCH_A;
409 case SSL3_ST_CW_KEY_EXCH_A:
410 case SSL3_ST_CW_KEY_EXCH_B:
411 ret=ssl3_send_client_key_exchange(s);
412 if (ret <= 0) goto end;
413 /* EAY EAY EAY need to check for DH fix cert
415 /* For TLS, cert_req is set to 2, so a cert chain
416 * of nothing is sent, but no verify packet is sent */
417 /* XXX: For now, we do not support client
418 * authentication in ECDH cipher suites with
419 * ECDH (rather than ECDSA) certificates.
420 * We need to skip the certificate verify
421 * message when client's ECDH public key is sent
422 * inside the client certificate.
424 if (s->s3->tmp.cert_req == 1)
426 s->state=SSL3_ST_CW_CERT_VRFY_A;
430 s->state=SSL3_ST_CW_CHANGE_A;
432 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
434 s->state=SSL3_ST_CW_CHANGE_A;
440 case SSL3_ST_CW_CERT_VRFY_A:
441 case SSL3_ST_CW_CERT_VRFY_B:
442 ret=ssl3_send_client_verify(s);
443 if (ret <= 0) goto end;
444 s->state=SSL3_ST_CW_CHANGE_A;
448 case SSL3_ST_CW_CHANGE_A:
449 case SSL3_ST_CW_CHANGE_B:
450 ret=ssl3_send_change_cipher_spec(s,
451 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
452 if (ret <= 0) goto end;
454 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
455 s->state=SSL3_ST_CW_FINISHED_A;
457 if (s->s3->next_proto_neg_seen)
458 s->state=SSL3_ST_CW_NEXT_PROTO_A;
460 s->state=SSL3_ST_CW_FINISHED_A;
464 s->session->cipher=s->s3->tmp.new_cipher;
465 #ifdef OPENSSL_NO_COMP
466 s->session->compress_meth=0;
468 if (s->s3->tmp.new_compression == NULL)
469 s->session->compress_meth=0;
471 s->session->compress_meth=
472 s->s3->tmp.new_compression->id;
474 if (!s->method->ssl3_enc->setup_key_block(s))
480 if (!s->method->ssl3_enc->change_cipher_state(s,
481 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
489 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
490 case SSL3_ST_CW_NEXT_PROTO_A:
491 case SSL3_ST_CW_NEXT_PROTO_B:
492 ret=ssl3_send_next_proto(s);
493 if (ret <= 0) goto end;
494 s->state=SSL3_ST_CW_FINISHED_A;
498 case SSL3_ST_CW_FINISHED_A:
499 case SSL3_ST_CW_FINISHED_B:
500 ret=ssl3_send_finished(s,
501 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
502 s->method->ssl3_enc->client_finished_label,
503 s->method->ssl3_enc->client_finished_label_len);
504 if (ret <= 0) goto end;
505 s->state=SSL3_ST_CW_FLUSH;
508 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
511 s->s3->tmp.next_state=SSL_ST_OK;
512 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
515 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
516 s->s3->delay_buf_pop_ret=0;
521 #ifndef OPENSSL_NO_TLSEXT
522 /* Allow NewSessionTicket if ticket expected */
523 if (s->tlsext_ticket_expected)
524 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
528 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
533 #ifndef OPENSSL_NO_TLSEXT
534 case SSL3_ST_CR_SESSION_TICKET_A:
535 case SSL3_ST_CR_SESSION_TICKET_B:
536 ret=ssl3_get_new_session_ticket(s);
537 if (ret <= 0) goto end;
538 s->state=SSL3_ST_CR_FINISHED_A;
542 case SSL3_ST_CR_CERT_STATUS_A:
543 case SSL3_ST_CR_CERT_STATUS_B:
544 ret=ssl3_get_cert_status(s);
545 if (ret <= 0) goto end;
546 s->state=SSL3_ST_CR_KEY_EXCH_A;
551 case SSL3_ST_CR_FINISHED_A:
552 case SSL3_ST_CR_FINISHED_B:
553 s->s3->flags |= SSL3_FLAGS_CCS_OK;
554 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
555 SSL3_ST_CR_FINISHED_B);
556 if (ret <= 0) goto end;
559 s->state=SSL3_ST_CW_CHANGE_A;
565 case SSL3_ST_CW_FLUSH:
566 s->rwstate=SSL_WRITING;
567 if (BIO_flush(s->wbio) <= 0)
572 s->rwstate=SSL_NOTHING;
573 s->state=s->s3->tmp.next_state;
577 /* clean a few things up */
578 ssl3_cleanup_key_block(s);
580 if (s->init_buf != NULL)
582 BUF_MEM_free(s->init_buf);
586 /* If we are not 'joining' the last two packets,
587 * remove the buffering now */
588 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
589 ssl_free_wbio_buffer(s);
590 /* else do it later in ssl3_write */
596 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
597 if (s->hit) s->ctx->stats.sess_hit++;
601 s->handshake_func=ssl3_connect;
602 s->ctx->stats.sess_connect_good++;
604 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
610 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
616 /* did we do anything */
617 if (!s->s3->tmp.reuse_message && !skip)
621 if ((ret=BIO_flush(s->wbio)) <= 0)
625 if ((cb != NULL) && (s->state != state))
629 cb(s,SSL_CB_CONNECT_LOOP,1);
640 cb(s,SSL_CB_CONNECT_EXIT,ret);
645 int ssl3_client_hello(SSL *s)
652 #ifndef OPENSSL_NO_COMP
657 buf=(unsigned char *)s->init_buf->data;
658 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
660 SSL_SESSION *sess = s->session;
661 if ((sess == NULL) ||
662 (sess->ssl_version != s->version) ||
663 !sess->session_id_length ||
664 (sess->not_resumable))
666 if (!ssl_get_new_session(s,0))
669 if (s->method->version == DTLS_ANY_VERSION)
671 /* Determine which DTLS version to use */
672 int options = s->options;
673 /* If DTLS 1.2 disabled correct the version number */
674 if (options & SSL_OP_NO_DTLSv1_2)
678 SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
681 /* Disabling all versions is silly: return an
684 if (options & SSL_OP_NO_DTLSv1)
686 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_WRONG_SSL_VERSION);
689 /* Update method so we don't use any DTLS 1.2
692 s->method = DTLSv1_client_method();
693 s->version = DTLS1_VERSION;
697 /* We only support one version: update method */
698 if (options & SSL_OP_NO_DTLSv1)
699 s->method = DTLSv1_2_client_method();
700 s->version = DTLS1_2_VERSION;
702 s->client_version = s->version;
704 /* else use the pre-loaded session */
706 p=s->s3->client_random;
708 /* for DTLS if client_random is initialized, reuse it, we are
709 * required to use same upon reply to HelloVerify */
714 for (idx=0; idx < sizeof(s->s3->client_random); idx++)
727 ssl_fill_hello_random(s, 0, p,
728 sizeof(s->s3->client_random));
730 /* Do the message type and length last */
731 d=p= ssl_handshake_start(s);
733 /* version indicates the negotiated version: for example from
734 * an SSLv2/v3 compatible client hello). The client_version
735 * field is the maximum version we permit and it is also
736 * used in RSA encrypted premaster secrets. Some servers can
737 * choke if we initially report a higher version then
738 * renegotiate to a lower one in the premaster secret. This
739 * didn't happen with TLS 1.0 as most servers supported it
740 * but it can with TLS 1.1 or later if the server only supports
743 * Possible scenario with previous logic:
744 * 1. Client hello indicates TLS 1.2
745 * 2. Server hello says TLS 1.0
746 * 3. RSA encrypted premaster secret uses 1.2.
747 * 4. Handhaked proceeds using TLS 1.0.
748 * 5. Server sends hello request to renegotiate.
749 * 6. Client hello indicates TLS v1.0 as we now
750 * know that is maximum server supports.
751 * 7. Server chokes on RSA encrypted premaster secret
752 * containing version 1.0.
754 * For interoperability it should be OK to always use the
755 * maximum version we support in client hello and then rely
756 * on the checking of version to ensure the servers isn't
757 * being inconsistent: for example initially negotiating with
758 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
759 * client_version in client hello and not resetting it to
760 * the negotiated version.
763 *(p++)=s->version>>8;
764 *(p++)=s->version&0xff;
765 s->client_version=s->version;
767 *(p++)=s->client_version>>8;
768 *(p++)=s->client_version&0xff;
772 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
779 i=s->session->session_id_length;
783 if (i > (int)sizeof(s->session->session_id))
785 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
788 memcpy(p,s->session->session_id,i);
792 /* cookie stuff for DTLS */
795 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
797 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
800 *(p++) = s->d1->cookie_len;
801 memcpy(p, s->d1->cookie, s->d1->cookie_len);
802 p += s->d1->cookie_len;
805 /* Ciphers supported */
806 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
809 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
812 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
813 /* Some servers hang if client hello > 256 bytes
814 * as hack workaround chop number of supported ciphers
815 * to keep it well below this if we use TLS v1.2
817 if (TLS1_get_version(s) >= TLS1_2_VERSION
818 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
819 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
825 #ifdef OPENSSL_NO_COMP
829 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
832 j=sk_SSL_COMP_num(s->ctx->comp_methods);
836 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
840 *(p++)=0; /* Add the NULL method */
842 #ifndef OPENSSL_NO_TLSEXT
844 if (ssl_prepare_clienthello_tlsext(s) <= 0)
846 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
849 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
851 ssl3_send_alert(s,SSL3_AL_FATAL,al);
852 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
858 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
859 s->state=SSL3_ST_CW_CLNT_HELLO_B;
862 /* SSL3_ST_CW_CLNT_HELLO_B */
863 return ssl_do_write(s);
868 int ssl3_get_server_hello(SSL *s)
870 STACK_OF(SSL_CIPHER) *sk;
874 int i,al=SSL_AD_INTERNAL_ERROR,ok;
877 #ifndef OPENSSL_NO_COMP
880 /* Hello verify request and/or server hello version may not
881 * match so set first packet if we're negotiating version.
886 n=s->method->ssl_get_message(s,
887 SSL3_ST_CR_SRVR_HELLO_A,
888 SSL3_ST_CR_SRVR_HELLO_B,
893 if (!ok) return((int)n);
898 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
900 if ( s->d1->send_cookie == 0)
902 s->s3->tmp.reuse_message = 1;
905 else /* already sent a cookie */
907 al=SSL_AD_UNEXPECTED_MESSAGE;
908 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
914 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
916 al=SSL_AD_UNEXPECTED_MESSAGE;
917 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
921 d=p=(unsigned char *)s->init_msg;
922 if (s->method->version == DTLS_ANY_VERSION)
924 /* Work out correct protocol version to use */
925 int hversion = (p[0] << 8)|p[1];
926 int options = s->options;
927 if (hversion == DTLS1_2_VERSION
928 && !(options & SSL_OP_NO_DTLSv1_2))
929 s->method = DTLSv1_2_client_method();
930 else if (tls1_suiteb(s))
932 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
933 s->version = hversion;
934 al = SSL_AD_PROTOCOL_VERSION;
937 else if (hversion == DTLS1_VERSION
938 && !(options & SSL_OP_NO_DTLSv1))
939 s->method = DTLSv1_client_method();
942 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
943 s->version = hversion;
944 al = SSL_AD_PROTOCOL_VERSION;
947 s->version = s->method->version;
950 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
952 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
953 s->version=(s->version&0xff00)|p[1];
954 al=SSL_AD_PROTOCOL_VERSION;
959 /* load the server hello data */
960 /* load the server random */
961 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
966 /* get the session-id */
969 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
971 al=SSL_AD_ILLEGAL_PARAMETER;
972 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
976 #ifndef OPENSSL_NO_TLSEXT
977 /* check if we want to resume the session based on external pre-shared secret */
978 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
980 SSL_CIPHER *pref_cipher=NULL;
981 s->session->master_key_length=sizeof(s->session->master_key);
982 if (s->tls_session_secret_cb(s, s->session->master_key,
983 &s->session->master_key_length,
985 s->tls_session_secret_cb_arg))
987 s->session->cipher = pref_cipher ?
988 pref_cipher : ssl_get_cipher_by_char(s, p+j);
992 #endif /* OPENSSL_NO_TLSEXT */
994 if (!s->hit && j != 0 && j == s->session->session_id_length
995 && memcmp(p,s->session->session_id,j) == 0)
997 if(s->sid_ctx_length != s->session->sid_ctx_length
998 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1000 /* actually a client application bug */
1001 al=SSL_AD_ILLEGAL_PARAMETER;
1002 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1007 /* a miss or crap from the other end */
1010 /* If we were trying for session-id reuse, make a new
1011 * SSL_SESSION so we don't stuff up other people */
1012 if (s->session->session_id_length > 0)
1014 if (!ssl_get_new_session(s,0))
1019 s->session->session_id_length=j;
1020 memcpy(s->session->session_id,p,j); /* j could be 0 */
1023 c=ssl_get_cipher_by_char(s,p);
1026 /* unknown cipher */
1027 al=SSL_AD_ILLEGAL_PARAMETER;
1028 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1031 /* Set version disabled mask now we know version */
1032 if (!SSL_USE_TLS1_2_CIPHERS(s))
1033 ct->mask_ssl = SSL_TLSV1_2;
1036 /* If it is a disabled cipher we didn't send it in client hello,
1037 * so return an error.
1039 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK))
1041 al=SSL_AD_ILLEGAL_PARAMETER;
1042 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1045 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1047 sk=ssl_get_ciphers_by_id(s);
1048 i=sk_SSL_CIPHER_find(sk,c);
1051 /* we did not say we would use this cipher */
1052 al=SSL_AD_ILLEGAL_PARAMETER;
1053 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1057 /* Depending on the session caching (internal/external), the cipher
1058 and/or cipher_id values may not be set. Make sure that
1059 cipher_id is set and use it for comparison. */
1060 if (s->session->cipher)
1061 s->session->cipher_id = s->session->cipher->id;
1062 if (s->hit && (s->session->cipher_id != c->id))
1064 /* Workaround is now obsolete */
1067 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1070 al=SSL_AD_ILLEGAL_PARAMETER;
1071 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1075 s->s3->tmp.new_cipher=c;
1076 /* Don't digest cached records if no sigalgs: we may need them for
1077 * client authentication.
1079 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1081 /* lets get the compression algorithm */
1083 #ifdef OPENSSL_NO_COMP
1086 al=SSL_AD_ILLEGAL_PARAMETER;
1087 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1090 /* If compression is disabled we'd better not try to resume a session
1091 * using compression.
1093 if (s->session->compress_meth != 0)
1095 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1100 if (s->hit && j != s->session->compress_meth)
1102 al=SSL_AD_ILLEGAL_PARAMETER;
1103 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1108 else if (!ssl_allow_compression(s))
1110 al=SSL_AD_ILLEGAL_PARAMETER;
1111 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1115 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1117 if ((j != 0) && (comp == NULL))
1119 al=SSL_AD_ILLEGAL_PARAMETER;
1120 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1125 s->s3->tmp.new_compression=comp;
1129 #ifndef OPENSSL_NO_TLSEXT
1131 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1133 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1140 /* wrong packet length */
1141 al=SSL_AD_DECODE_ERROR;
1142 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1148 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1153 int ssl3_get_server_certificate(SSL *s)
1155 int al,i,ok,ret= -1;
1156 unsigned long n,nc,llen,l;
1158 const unsigned char *q,*p;
1160 STACK_OF(X509) *sk=NULL;
1162 EVP_PKEY *pkey=NULL;
1163 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1165 n=s->method->ssl_get_message(s,
1172 if (!ok) return((int)n);
1174 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1175 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1176 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1178 s->s3->tmp.reuse_message=1;
1182 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1184 al=SSL_AD_UNEXPECTED_MESSAGE;
1185 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1188 p=d=(unsigned char *)s->init_msg;
1190 if ((sk=sk_X509_new_null()) == NULL)
1192 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1199 al=SSL_AD_DECODE_ERROR;
1200 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1203 for (nc=0; nc<llen; )
1206 if ((l+nc+3) > llen)
1208 al=SSL_AD_DECODE_ERROR;
1209 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1214 x=d2i_X509(NULL,&q,l);
1217 al=SSL_AD_BAD_CERTIFICATE;
1218 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1223 al=SSL_AD_DECODE_ERROR;
1224 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1227 if (!sk_X509_push(sk,x))
1229 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1237 i=ssl_verify_cert_chain(s,sk);
1238 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1239 #ifndef OPENSSL_NO_KRB5
1240 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1241 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1242 #endif /* OPENSSL_NO_KRB5 */
1245 al=ssl_verify_alarm_type(s->verify_result);
1246 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1249 ERR_clear_error(); /* but we keep s->verify_result */
1252 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1253 al = SSL_AD_HANDSHAKE_FAILURE;
1257 sc=ssl_sess_cert_new();
1258 if (sc == NULL) goto err;
1260 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1261 s->session->sess_cert=sc;
1264 /* Inconsistency alert: cert_chain does include the peer's
1265 * certificate, which we don't include in s3_srvr.c */
1266 x=sk_X509_value(sk,0);
1268 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1270 pkey=X509_get_pubkey(x);
1272 /* VRS: allow null cert if auth == KRB5 */
1273 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1274 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1278 fprintf(stderr,"pkey,x = %p, %p\n", pkey,x);
1279 fprintf(stderr,"ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1280 fprintf(stderr,"cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1281 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1282 #endif /* KSSL_DEBUG */
1284 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1288 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1289 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1293 i=ssl_cert_type(x,pkey);
1294 if (need_cert && i < 0)
1298 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1299 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1305 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1306 if (exp_idx >= 0 && i != exp_idx)
1309 al=SSL_AD_ILLEGAL_PARAMETER;
1310 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1311 SSL_R_WRONG_CERTIFICATE_TYPE);
1314 sc->peer_cert_type=i;
1315 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1316 /* Why would the following ever happen?
1317 * We just created sc a couple of lines ago. */
1318 if (sc->peer_pkeys[i].x509 != NULL)
1319 X509_free(sc->peer_pkeys[i].x509);
1320 sc->peer_pkeys[i].x509=x;
1321 sc->peer_key= &(sc->peer_pkeys[i]);
1323 if (s->session->peer != NULL)
1324 X509_free(s->session->peer);
1325 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1330 sc->peer_cert_type=i;
1333 if (s->session->peer != NULL)
1334 X509_free(s->session->peer);
1335 s->session->peer=NULL;
1337 s->session->verify_result = s->verify_result;
1344 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1347 EVP_PKEY_free(pkey);
1349 sk_X509_pop_free(sk,X509_free);
1353 int ssl3_get_key_exchange(SSL *s)
1355 #ifndef OPENSSL_NO_RSA
1356 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1359 unsigned char *param,*p;
1361 long i,param_len,n,alg_k,alg_a;
1362 EVP_PKEY *pkey=NULL;
1363 const EVP_MD *md = NULL;
1364 #ifndef OPENSSL_NO_RSA
1367 #ifndef OPENSSL_NO_DH
1370 #ifndef OPENSSL_NO_ECDH
1371 EC_KEY *ecdh = NULL;
1372 BN_CTX *bn_ctx = NULL;
1373 EC_POINT *srvr_ecpoint = NULL;
1375 int encoded_pt_len = 0;
1378 /* use same message size as in ssl3_get_certificate_request()
1379 * as ServerKeyExchange message may be skipped */
1380 n=s->method->ssl_get_message(s,
1381 SSL3_ST_CR_KEY_EXCH_A,
1382 SSL3_ST_CR_KEY_EXCH_B,
1386 if (!ok) return((int)n);
1388 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1390 #ifndef OPENSSL_NO_PSK
1391 /* In plain PSK ciphersuite, ServerKeyExchange can be
1392 omitted if no identity hint is sent. Set
1393 session->sess_cert anyway to avoid problems
1395 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1397 s->session->sess_cert=ssl_sess_cert_new();
1398 if (s->ctx->psk_identity_hint)
1399 OPENSSL_free(s->ctx->psk_identity_hint);
1400 s->ctx->psk_identity_hint = NULL;
1403 s->s3->tmp.reuse_message=1;
1407 param=p=(unsigned char *)s->init_msg;
1408 if (s->session->sess_cert != NULL)
1410 #ifndef OPENSSL_NO_RSA
1411 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1413 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1414 s->session->sess_cert->peer_rsa_tmp=NULL;
1417 #ifndef OPENSSL_NO_DH
1418 if (s->session->sess_cert->peer_dh_tmp)
1420 DH_free(s->session->sess_cert->peer_dh_tmp);
1421 s->session->sess_cert->peer_dh_tmp=NULL;
1424 #ifndef OPENSSL_NO_ECDH
1425 if (s->session->sess_cert->peer_ecdh_tmp)
1427 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1428 s->session->sess_cert->peer_ecdh_tmp=NULL;
1434 s->session->sess_cert=ssl_sess_cert_new();
1437 /* Total length of the parameters including the length prefix */
1440 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1441 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1442 EVP_MD_CTX_init(&md_ctx);
1444 al=SSL_AD_DECODE_ERROR;
1446 #ifndef OPENSSL_NO_PSK
1447 if (alg_k & SSL_kPSK)
1449 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1454 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1455 SSL_R_LENGTH_TOO_SHORT);
1460 /* Store PSK identity hint for later use, hint is used
1461 * in ssl3_send_client_key_exchange. Assume that the
1462 * maximum length of a PSK identity hint can be as
1463 * long as the maximum length of a PSK identity. */
1464 if (i > PSK_MAX_IDENTITY_LEN)
1466 al=SSL_AD_HANDSHAKE_FAILURE;
1467 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1468 SSL_R_DATA_LENGTH_TOO_LONG);
1471 if (i > n - param_len)
1473 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1474 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1479 /* If received PSK identity hint contains NULL
1480 * characters, the hint is truncated from the first
1481 * NULL. p may not be ending with NULL, so create a
1482 * NULL-terminated string. */
1483 memcpy(tmp_id_hint, p, i);
1484 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1485 if (s->ctx->psk_identity_hint != NULL)
1486 OPENSSL_free(s->ctx->psk_identity_hint);
1487 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1488 if (s->ctx->psk_identity_hint == NULL)
1490 al=SSL_AD_HANDSHAKE_FAILURE;
1491 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1499 #endif /* !OPENSSL_NO_PSK */
1500 #ifndef OPENSSL_NO_SRP
1501 if (alg_k & SSL_kSRP)
1506 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1507 SSL_R_LENGTH_TOO_SHORT);
1512 if (i > n - param_len)
1514 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1519 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1527 if (2 > n - param_len)
1529 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1530 SSL_R_LENGTH_TOO_SHORT);
1537 if (i > n - param_len)
1539 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1544 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1552 if (1 > n - param_len)
1554 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1555 SSL_R_LENGTH_TOO_SHORT);
1560 i = (unsigned int)(p[0]);
1563 if (i > n - param_len)
1565 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1570 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1572 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1577 if (2 > n - param_len)
1579 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1580 SSL_R_LENGTH_TOO_SHORT);
1587 if (i > n - param_len)
1589 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1594 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1596 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1602 if (!srp_verify_server_param(s, &al))
1604 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1608 /* We must check if there is a certificate */
1609 #ifndef OPENSSL_NO_RSA
1610 if (alg_a & SSL_aRSA)
1611 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1616 #ifndef OPENSSL_NO_DSA
1617 else if (alg_a & SSL_aDSS)
1618 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1622 #endif /* !OPENSSL_NO_SRP */
1623 #ifndef OPENSSL_NO_RSA
1624 if (alg_k & SSL_kRSA)
1626 if ((rsa=RSA_new()) == NULL)
1628 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1635 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1636 SSL_R_LENGTH_TOO_SHORT);
1641 if (i > n - param_len)
1643 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1648 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1650 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1655 if (2 > n - param_len)
1657 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1658 SSL_R_LENGTH_TOO_SHORT);
1665 if (i > n - param_len)
1667 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1672 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1674 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1680 /* this should be because we are using an export cipher */
1681 if (alg_a & SSL_aRSA)
1682 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1685 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1688 s->session->sess_cert->peer_rsa_tmp=rsa;
1691 #else /* OPENSSL_NO_RSA */
1695 #ifndef OPENSSL_NO_DH
1696 else if (alg_k & SSL_kDHE)
1698 if ((dh=DH_new()) == NULL)
1700 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1707 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1708 SSL_R_LENGTH_TOO_SHORT);
1713 if (i > n - param_len)
1715 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1720 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1722 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1727 if (2 > n - param_len)
1729 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1730 SSL_R_LENGTH_TOO_SHORT);
1737 if (i > n - param_len)
1739 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1744 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1746 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1751 if (2 > n - param_len)
1753 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1754 SSL_R_LENGTH_TOO_SHORT);
1761 if (i > n - param_len)
1763 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1768 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1770 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1776 if (!ssl_security(s, SSL_SECOP_TMP_DH,
1777 DH_security_bits(dh), 0, dh))
1779 al=SSL_AD_HANDSHAKE_FAILURE;
1780 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL);
1784 #ifndef OPENSSL_NO_RSA
1785 if (alg_a & SSL_aRSA)
1786 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1791 #ifndef OPENSSL_NO_DSA
1792 else if (alg_a & SSL_aDSS)
1793 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1795 /* else anonymous DH, so no certificate or pkey. */
1797 s->session->sess_cert->peer_dh_tmp=dh;
1800 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1802 al=SSL_AD_ILLEGAL_PARAMETER;
1803 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1806 #endif /* !OPENSSL_NO_DH */
1808 #ifndef OPENSSL_NO_ECDH
1809 else if (alg_k & SSL_kECDHE)
1812 const EC_GROUP *group;
1814 if ((ecdh=EC_KEY_new()) == NULL)
1816 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1820 /* Extract elliptic curve parameters and the
1821 * server's ephemeral ECDH public key.
1822 * Keep accumulating lengths of various components in
1823 * param_len and make sure it never exceeds n.
1826 /* XXX: For now we only support named (not generic) curves
1827 * and the ECParameters in this case is just three bytes. We
1828 * also need one byte for the length of the encoded point
1833 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1834 SSL_R_LENGTH_TOO_SHORT);
1837 /* Check curve is one of our preferences, if not server has
1838 * sent an invalid curve. ECParameters is 3 bytes.
1840 if (!tls1_check_curve(s, p, 3))
1842 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1846 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1848 al=SSL_AD_INTERNAL_ERROR;
1849 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1853 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1856 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1859 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1861 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1864 EC_GROUP_free(ngroup);
1866 group = EC_KEY_get0_group(ecdh);
1868 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1869 (EC_GROUP_get_degree(group) > 163))
1871 al=SSL_AD_EXPORT_RESTRICTION;
1872 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1878 /* Next, get the encoded ECPoint */
1879 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1880 ((bn_ctx = BN_CTX_new()) == NULL))
1882 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1886 encoded_pt_len = *p; /* length of encoded point */
1889 if ((encoded_pt_len > n - param_len) ||
1890 (EC_POINT_oct2point(group, srvr_ecpoint,
1891 p, encoded_pt_len, bn_ctx) == 0))
1893 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1896 param_len += encoded_pt_len;
1901 /* The ECC/TLS specification does not mention
1902 * the use of DSA to sign ECParameters in the server
1903 * key exchange message. We do support RSA and ECDSA.
1906 #ifndef OPENSSL_NO_RSA
1907 else if (alg_a & SSL_aRSA)
1908 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1910 #ifndef OPENSSL_NO_ECDSA
1911 else if (alg_a & SSL_aECDSA)
1912 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1914 /* else anonymous ECDH, so no certificate or pkey. */
1915 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1916 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1918 BN_CTX_free(bn_ctx);
1920 EC_POINT_free(srvr_ecpoint);
1921 srvr_ecpoint = NULL;
1925 al=SSL_AD_UNEXPECTED_MESSAGE;
1926 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1929 #endif /* !OPENSSL_NO_ECDH */
1932 /* p points to the next byte, there are 'n' bytes left */
1934 /* if it was signed, check the signature */
1937 if (SSL_USE_SIGALGS(s))
1942 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1943 SSL_R_LENGTH_TOO_SHORT);
1946 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1954 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1964 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1965 SSL_R_LENGTH_TOO_SHORT);
1970 j=EVP_PKEY_size(pkey);
1972 /* Check signature length. If n is 0 then signature is empty */
1973 if ((i != n) || (n > j) || (n <= 0))
1975 /* wrong packet length */
1976 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1980 #ifndef OPENSSL_NO_RSA
1981 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
1988 for (num=2; num > 0; num--)
1990 EVP_MD_CTX_set_flags(&md_ctx,
1991 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1992 EVP_DigestInit_ex(&md_ctx,(num == 2)
1993 ?s->ctx->md5:s->ctx->sha1, NULL);
1994 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1995 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1996 EVP_DigestUpdate(&md_ctx,param,param_len);
1997 EVP_DigestFinal_ex(&md_ctx,q,&size);
2001 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
2005 al=SSL_AD_DECRYPT_ERROR;
2006 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
2012 al=SSL_AD_DECRYPT_ERROR;
2013 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2020 EVP_VerifyInit_ex(&md_ctx, md, NULL);
2021 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2022 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2023 EVP_VerifyUpdate(&md_ctx,param,param_len);
2024 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
2027 al=SSL_AD_DECRYPT_ERROR;
2028 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2035 /* aNULL, aSRP or kPSK do not need public keys */
2036 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
2038 /* Might be wrong key type, check it */
2039 if (ssl3_check_cert_and_algorithm(s))
2040 /* Otherwise this shouldn't happen */
2041 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2044 /* still data left over */
2047 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
2051 EVP_PKEY_free(pkey);
2052 EVP_MD_CTX_cleanup(&md_ctx);
2055 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2057 EVP_PKEY_free(pkey);
2058 #ifndef OPENSSL_NO_RSA
2062 #ifndef OPENSSL_NO_DH
2066 #ifndef OPENSSL_NO_ECDH
2067 BN_CTX_free(bn_ctx);
2068 EC_POINT_free(srvr_ecpoint);
2072 EVP_MD_CTX_cleanup(&md_ctx);
2076 int ssl3_get_certificate_request(SSL *s)
2079 unsigned long n,nc,l;
2080 unsigned int llen, ctype_num,i;
2082 const unsigned char *p,*q;
2084 STACK_OF(X509_NAME) *ca_sk=NULL;
2086 n=s->method->ssl_get_message(s,
2087 SSL3_ST_CR_CERT_REQ_A,
2088 SSL3_ST_CR_CERT_REQ_B,
2093 if (!ok) return((int)n);
2095 s->s3->tmp.cert_req=0;
2097 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2099 s->s3->tmp.reuse_message=1;
2100 /* If we get here we don't need any cached handshake records
2101 * as we wont be doing client auth.
2103 if (s->s3->handshake_buffer)
2105 if (!ssl3_digest_cached_records(s))
2111 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2113 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2114 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2118 /* TLS does not like anon-DH with client cert */
2119 if (s->version > SSL3_VERSION)
2121 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2123 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2124 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2129 p=d=(unsigned char *)s->init_msg;
2131 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2133 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2137 /* get the certificate types */
2139 if (s->cert->ctypes)
2141 OPENSSL_free(s->cert->ctypes);
2142 s->cert->ctypes = NULL;
2144 if (ctype_num > SSL3_CT_NUMBER)
2146 /* If we exceed static buffer copy all to cert structure */
2147 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2148 if (s->cert->ctypes == NULL)
2150 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2153 memcpy(s->cert->ctypes, p, ctype_num);
2154 s->cert->ctype_num = (size_t)ctype_num;
2155 ctype_num=SSL3_CT_NUMBER;
2157 for (i=0; i<ctype_num; i++)
2158 s->s3->tmp.ctype[i]= p[i];
2160 if (SSL_USE_SIGALGS(s))
2163 /* Check we have enough room for signature algorithms and
2164 * following length value.
2166 if ((unsigned long)(p - d + llen + 2) > n)
2168 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2169 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2172 /* Clear certificate digests and validity flags */
2173 for (i = 0; i < SSL_PKEY_NUM; i++)
2175 s->cert->pkeys[i].digest = NULL;
2176 s->cert->pkeys[i].valid_flags = 0;
2178 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen))
2180 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2181 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2184 if (!tls1_process_sigalgs(s))
2186 ssl3_send_alert(s,SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2187 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2193 /* get the CA RDNs */
2198 out=fopen("/tmp/vsign.der","w");
2199 fwrite(p,1,llen,out);
2204 if ((unsigned long)(p - d + llen) != n)
2206 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2207 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2211 for (nc=0; nc<llen; )
2214 if ((l+nc+2) > llen)
2216 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2217 goto cont; /* netscape bugs */
2218 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2219 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2225 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2227 /* If netscape tolerance is on, ignore errors */
2228 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2232 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2233 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2240 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2241 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2244 if (!sk_X509_NAME_push(ca_sk,xn))
2246 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2260 /* we should setup a certificate to return.... */
2261 s->s3->tmp.cert_req=1;
2262 s->s3->tmp.ctype_num=ctype_num;
2263 if (s->s3->tmp.ca_names != NULL)
2264 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2265 s->s3->tmp.ca_names=ca_sk;
2270 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2274 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2276 return(X509_NAME_cmp(*a,*b));
2278 #ifndef OPENSSL_NO_TLSEXT
2279 int ssl3_get_new_session_ticket(SSL *s)
2281 int ok,al,ret=0, ticklen;
2283 const unsigned char *p;
2286 n=s->method->ssl_get_message(s,
2287 SSL3_ST_CR_SESSION_TICKET_A,
2288 SSL3_ST_CR_SESSION_TICKET_B,
2289 SSL3_MT_NEWSESSION_TICKET,
2298 /* need at least ticket_lifetime_hint + ticket length */
2299 al = SSL_AD_DECODE_ERROR;
2300 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2304 p=d=(unsigned char *)s->init_msg;
2305 n2l(p, s->session->tlsext_tick_lifetime_hint);
2307 /* ticket_lifetime_hint + ticket_length + ticket */
2308 if (ticklen + 6 != n)
2310 al = SSL_AD_DECODE_ERROR;
2311 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2314 if (s->session->tlsext_tick)
2316 OPENSSL_free(s->session->tlsext_tick);
2317 s->session->tlsext_ticklen = 0;
2319 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2320 if (!s->session->tlsext_tick)
2322 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2325 memcpy(s->session->tlsext_tick, p, ticklen);
2326 s->session->tlsext_ticklen = ticklen;
2327 /* There are two ways to detect a resumed ticket session.
2328 * One is to set an appropriate session ID and then the server
2329 * must return a match in ServerHello. This allows the normal
2330 * client session ID matching to work and we know much
2331 * earlier that the ticket has been accepted.
2333 * The other way is to set zero length session ID when the
2334 * ticket is presented and rely on the handshake to determine
2335 * session resumption.
2337 * We choose the former approach because this fits in with
2338 * assumptions elsewhere in OpenSSL. The session ID is set
2339 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2342 EVP_Digest(p, ticklen,
2343 s->session->session_id, &s->session->session_id_length,
2344 #ifndef OPENSSL_NO_SHA256
2345 EVP_sha256(), NULL);
2352 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2357 int ssl3_get_cert_status(SSL *s)
2360 unsigned long resplen,n;
2361 const unsigned char *p;
2363 n=s->method->ssl_get_message(s,
2364 SSL3_ST_CR_CERT_STATUS_A,
2365 SSL3_ST_CR_CERT_STATUS_B,
2366 SSL3_MT_CERTIFICATE_STATUS,
2370 if (!ok) return((int)n);
2373 /* need at least status type + length */
2374 al = SSL_AD_DECODE_ERROR;
2375 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2378 p = (unsigned char *)s->init_msg;
2379 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2381 al = SSL_AD_DECODE_ERROR;
2382 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2386 if (resplen + 4 != n)
2388 al = SSL_AD_DECODE_ERROR;
2389 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2392 if (s->tlsext_ocsp_resp)
2393 OPENSSL_free(s->tlsext_ocsp_resp);
2394 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2395 if (!s->tlsext_ocsp_resp)
2397 al = SSL_AD_INTERNAL_ERROR;
2398 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2401 s->tlsext_ocsp_resplen = resplen;
2402 if (s->ctx->tlsext_status_cb)
2405 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2408 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2409 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2414 al = SSL_AD_INTERNAL_ERROR;
2415 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2421 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2426 int ssl3_get_server_done(SSL *s)
2431 n=s->method->ssl_get_message(s,
2432 SSL3_ST_CR_SRVR_DONE_A,
2433 SSL3_ST_CR_SRVR_DONE_B,
2434 SSL3_MT_SERVER_DONE,
2435 30, /* should be very small, like 0 :-) */
2438 if (!ok) return((int)n);
2441 /* should contain no data */
2442 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2443 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2451 int ssl3_send_client_key_exchange(SSL *s)
2455 unsigned long alg_k;
2456 #ifndef OPENSSL_NO_RSA
2458 EVP_PKEY *pkey=NULL;
2460 #ifndef OPENSSL_NO_KRB5
2462 #endif /* OPENSSL_NO_KRB5 */
2463 #ifndef OPENSSL_NO_ECDH
2464 EC_KEY *clnt_ecdh = NULL;
2465 const EC_POINT *srvr_ecpoint = NULL;
2466 EVP_PKEY *srvr_pub_pkey = NULL;
2467 unsigned char *encodedPoint = NULL;
2468 int encoded_pt_len = 0;
2469 BN_CTX * bn_ctx = NULL;
2472 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2474 p = ssl_handshake_start(s);
2476 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2478 /* Fool emacs indentation */
2480 #ifndef OPENSSL_NO_RSA
2481 else if (alg_k & SSL_kRSA)
2484 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2486 if (s->session->sess_cert == NULL)
2488 /* We should always have a server certificate with SSL_kRSA. */
2489 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2493 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2494 rsa=s->session->sess_cert->peer_rsa_tmp;
2497 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2498 if ((pkey == NULL) ||
2499 (pkey->type != EVP_PKEY_RSA) ||
2500 (pkey->pkey.rsa == NULL))
2502 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2506 EVP_PKEY_free(pkey);
2509 tmp_buf[0]=s->client_version>>8;
2510 tmp_buf[1]=s->client_version&0xff;
2511 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2514 s->session->master_key_length=sizeof tmp_buf;
2517 /* Fix buf for TLS and beyond */
2518 if (s->version > SSL3_VERSION)
2520 n=RSA_public_encrypt(sizeof tmp_buf,
2521 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2523 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2524 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2528 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2532 /* Fix buf for TLS and beyond */
2533 if (s->version > SSL3_VERSION)
2539 s->session->master_key_length=
2540 s->method->ssl3_enc->generate_master_secret(s,
2541 s->session->master_key,
2542 tmp_buf,sizeof tmp_buf);
2543 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2546 #ifndef OPENSSL_NO_KRB5
2547 else if (alg_k & SSL_kKRB5)
2549 krb5_error_code krb5rc;
2550 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2551 /* krb5_data krb5_ap_req; */
2552 krb5_data *enc_ticket;
2553 krb5_data authenticator, *authp = NULL;
2554 EVP_CIPHER_CTX ciph_ctx;
2555 const EVP_CIPHER *enc = NULL;
2556 unsigned char iv[EVP_MAX_IV_LENGTH];
2557 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2558 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2559 + EVP_MAX_IV_LENGTH];
2560 int padl, outl = sizeof(epms);
2562 EVP_CIPHER_CTX_init(&ciph_ctx);
2565 fprintf(stderr,"ssl3_send_client_key_exchange(%lx & %lx)\n",
2567 #endif /* KSSL_DEBUG */
2571 if (KRB5SENDAUTH) authp = &authenticator;
2572 #endif /* KRB5SENDAUTH */
2574 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2576 enc = kssl_map_enc(kssl_ctx->enctype);
2581 fprintf(stderr,"kssl_cget_tkt rtn %d\n", krb5rc);
2582 if (krb5rc && kssl_err.text)
2583 fprintf(stderr,"kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2585 #endif /* KSSL_DEBUG */
2589 ssl3_send_alert(s,SSL3_AL_FATAL,
2590 SSL_AD_HANDSHAKE_FAILURE);
2591 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2596 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2597 ** in place of RFC 2712 KerberosWrapper, as in:
2599 ** Send ticket (copy to *p, set n = length)
2600 ** n = krb5_ap_req.length;
2601 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2602 ** if (krb5_ap_req.data)
2603 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2605 ** Now using real RFC 2712 KerberosWrapper
2606 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2607 ** Note: 2712 "opaque" types are here replaced
2608 ** with a 2-byte length followed by the value.
2610 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2611 ** Where "xx xx" = length bytes. Shown here with
2612 ** optional authenticator omitted.
2615 /* KerberosWrapper.Ticket */
2616 s2n(enc_ticket->length,p);
2617 memcpy(p, enc_ticket->data, enc_ticket->length);
2618 p+= enc_ticket->length;
2619 n = enc_ticket->length + 2;
2621 /* KerberosWrapper.Authenticator */
2622 if (authp && authp->length)
2624 s2n(authp->length,p);
2625 memcpy(p, authp->data, authp->length);
2627 n+= authp->length + 2;
2635 s2n(0,p);/* null authenticator length */
2639 tmp_buf[0]=s->client_version>>8;
2640 tmp_buf[1]=s->client_version&0xff;
2641 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2644 /* 20010420 VRS. Tried it this way; failed.
2645 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2646 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2647 ** kssl_ctx->length);
2648 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2651 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2652 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2654 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2656 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2658 if (outl > (int)sizeof epms)
2660 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2663 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2665 /* KerberosWrapper.EncryptedPreMasterSecret */
2667 memcpy(p, epms, outl);
2671 s->session->master_key_length=
2672 s->method->ssl3_enc->generate_master_secret(s,
2673 s->session->master_key,
2674 tmp_buf, sizeof tmp_buf);
2676 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2677 OPENSSL_cleanse(epms, outl);
2680 #ifndef OPENSSL_NO_DH
2681 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2683 DH *dh_srvr,*dh_clnt;
2684 SESS_CERT *scert = s->session->sess_cert;
2688 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2689 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2693 if (scert->peer_dh_tmp != NULL)
2694 dh_srvr=scert->peer_dh_tmp;
2697 /* we get them from the cert */
2698 int idx = scert->peer_cert_type;
2699 EVP_PKEY *spkey = NULL;
2702 spkey = X509_get_pubkey(
2703 scert->peer_pkeys[idx].x509);
2706 dh_srvr = EVP_PKEY_get1_DH(spkey);
2707 EVP_PKEY_free(spkey);
2709 if (dh_srvr == NULL)
2711 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2712 ERR_R_INTERNAL_ERROR);
2716 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2718 /* Use client certificate key */
2719 EVP_PKEY *clkey = s->cert->key->privatekey;
2722 dh_clnt = EVP_PKEY_get1_DH(clkey);
2723 if (dh_clnt == NULL)
2725 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2726 ERR_R_INTERNAL_ERROR);
2732 /* generate a new random key */
2733 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2735 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2738 if (!DH_generate_key(dh_clnt))
2740 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2746 /* use the 'p' output buffer for the DH key, but
2747 * make sure to clear it out afterwards */
2749 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2750 if (scert->peer_dh_tmp == NULL)
2755 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2760 /* generate master key from the result */
2761 s->session->master_key_length=
2762 s->method->ssl3_enc->generate_master_secret(s,
2763 s->session->master_key,p,n);
2767 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2771 /* send off the data */
2772 n=BN_num_bytes(dh_clnt->pub_key);
2774 BN_bn2bin(dh_clnt->pub_key,p);
2780 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2784 #ifndef OPENSSL_NO_ECDH
2785 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2787 const EC_GROUP *srvr_group = NULL;
2789 int ecdh_clnt_cert = 0;
2792 if (s->session->sess_cert == NULL)
2794 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2795 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2799 /* Did we send out the client's
2800 * ECDH share for use in premaster
2801 * computation as part of client certificate?
2802 * If so, set ecdh_clnt_cert to 1.
2804 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2806 /* XXX: For now, we do not support client
2807 * authentication using ECDH certificates.
2808 * To add such support, one needs to add
2809 * code that checks for appropriate
2810 * conditions and sets ecdh_clnt_cert to 1.
2811 * For example, the cert have an ECC
2812 * key on the same curve as the server's
2813 * and the key should be authorized for
2816 * One also needs to add code in ssl3_connect
2817 * to skip sending the certificate verify
2820 * if ((s->cert->key->privatekey != NULL) &&
2821 * (s->cert->key->privatekey->type ==
2822 * EVP_PKEY_EC) && ...)
2823 * ecdh_clnt_cert = 1;
2827 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2829 tkey = s->session->sess_cert->peer_ecdh_tmp;
2833 /* Get the Server Public Key from Cert */
2834 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2835 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2836 if ((srvr_pub_pkey == NULL) ||
2837 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2838 (srvr_pub_pkey->pkey.ec == NULL))
2840 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2841 ERR_R_INTERNAL_ERROR);
2845 tkey = srvr_pub_pkey->pkey.ec;
2848 srvr_group = EC_KEY_get0_group(tkey);
2849 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2851 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2853 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2854 ERR_R_INTERNAL_ERROR);
2858 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2860 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2864 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2866 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2871 /* Reuse key info from our certificate
2872 * We only need our private key to perform
2873 * the ECDH computation.
2875 const BIGNUM *priv_key;
2876 tkey = s->cert->key->privatekey->pkey.ec;
2877 priv_key = EC_KEY_get0_private_key(tkey);
2878 if (priv_key == NULL)
2880 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2883 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2885 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2891 /* Generate a new ECDH key pair */
2892 if (!(EC_KEY_generate_key(clnt_ecdh)))
2894 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2899 /* use the 'p' output buffer for the ECDH key, but
2900 * make sure to clear it out afterwards
2903 field_size = EC_GROUP_get_degree(srvr_group);
2904 if (field_size <= 0)
2906 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2910 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2913 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2918 /* generate master key from the result */
2919 s->session->master_key_length = s->method->ssl3_enc \
2920 -> generate_master_secret(s,
2921 s->session->master_key,
2924 memset(p, 0, n); /* clean up */
2928 /* Send empty client key exch message */
2933 /* First check the size of encoding and
2934 * allocate memory accordingly.
2937 EC_POINT_point2oct(srvr_group,
2938 EC_KEY_get0_public_key(clnt_ecdh),
2939 POINT_CONVERSION_UNCOMPRESSED,
2942 encodedPoint = (unsigned char *)
2943 OPENSSL_malloc(encoded_pt_len *
2944 sizeof(unsigned char));
2945 bn_ctx = BN_CTX_new();
2946 if ((encodedPoint == NULL) ||
2949 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2953 /* Encode the public key */
2954 n = EC_POINT_point2oct(srvr_group,
2955 EC_KEY_get0_public_key(clnt_ecdh),
2956 POINT_CONVERSION_UNCOMPRESSED,
2957 encodedPoint, encoded_pt_len, bn_ctx);
2959 *p = n; /* length of encoded point */
2960 /* Encoded point will be copied here */
2962 /* copy the point */
2963 memcpy((unsigned char *)p, encodedPoint, n);
2964 /* increment n to account for length field */
2968 /* Free allocated memory */
2969 BN_CTX_free(bn_ctx);
2970 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2971 if (clnt_ecdh != NULL)
2972 EC_KEY_free(clnt_ecdh);
2973 EVP_PKEY_free(srvr_pub_pkey);
2975 #endif /* !OPENSSL_NO_ECDH */
2976 else if (alg_k & SSL_kGOST)
2978 /* GOST key exchange message creation */
2979 EVP_PKEY_CTX *pkey_ctx;
2982 unsigned int md_len;
2984 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2985 EVP_MD_CTX *ukm_hash;
2988 /* Get server sertificate PKEY and create ctx from it */
2989 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2991 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2993 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2997 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2998 /* If we have send a certificate, and certificate key
3000 * parameters match those of server certificate, use
3001 * certificate key for key exchange
3004 /* Otherwise, generate ephemeral key pair */
3006 EVP_PKEY_encrypt_init(pkey_ctx);
3007 /* Generate session key */
3008 RAND_bytes(premaster_secret,32);
3009 /* If we have client certificate, use its secret as peer key */
3010 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
3011 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
3012 /* If there was an error - just ignore it. Ephemeral key
3018 /* Compute shared IV and store it in algorithm-specific
3020 ukm_hash = EVP_MD_CTX_create();
3021 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
3022 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
3023 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
3024 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
3025 EVP_MD_CTX_destroy(ukm_hash);
3026 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
3028 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3032 /* Make GOST keytransport blob message */
3033 /*Encapsulate it into sequence */
3034 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
3036 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
3037 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3044 *(p++)= msglen & 0xff;
3049 *(p++)= msglen & 0xff;
3052 memcpy(p, tmp, msglen);
3053 /* Check if pubkey from client certificate was used */
3054 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
3056 /* Set flag "skip certificate verify" */
3057 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3059 EVP_PKEY_CTX_free(pkey_ctx);
3060 s->session->master_key_length=
3061 s->method->ssl3_enc->generate_master_secret(s,
3062 s->session->master_key,premaster_secret,32);
3063 EVP_PKEY_free(pub_key);
3066 #ifndef OPENSSL_NO_SRP
3067 else if (alg_k & SSL_kSRP)
3069 if (s->srp_ctx.A != NULL)
3071 /* send off the data */
3072 n=BN_num_bytes(s->srp_ctx.A);
3074 BN_bn2bin(s->srp_ctx.A,p);
3079 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3082 if (s->session->srp_username != NULL)
3083 OPENSSL_free(s->session->srp_username);
3084 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3085 if (s->session->srp_username == NULL)
3087 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3088 ERR_R_MALLOC_FAILURE);
3092 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3094 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3099 #ifndef OPENSSL_NO_PSK
3100 else if (alg_k & SSL_kPSK)
3102 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes
3103 * to return a \0-terminated identity. The last byte
3104 * is for us for simulating strnlen. */
3105 char identity[PSK_MAX_IDENTITY_LEN + 2];
3106 size_t identity_len;
3107 unsigned char *t = NULL;
3108 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3109 unsigned int pre_ms_len = 0, psk_len = 0;
3113 if (s->psk_client_callback == NULL)
3115 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3116 SSL_R_PSK_NO_CLIENT_CB);
3120 memset(identity, 0, sizeof(identity));
3121 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3122 identity, sizeof(identity) - 1,
3123 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3124 if (psk_len > PSK_MAX_PSK_LEN)
3126 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3127 ERR_R_INTERNAL_ERROR);
3130 else if (psk_len == 0)
3132 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3133 SSL_R_PSK_IDENTITY_NOT_FOUND);
3136 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
3137 identity_len = strlen(identity);
3138 if (identity_len > PSK_MAX_IDENTITY_LEN)
3140 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3141 ERR_R_INTERNAL_ERROR);
3144 /* create PSK pre_master_secret */
3145 pre_ms_len = 2+psk_len+2+psk_len;
3147 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3149 memset(t, 0, psk_len);
3153 if (s->session->psk_identity_hint != NULL)
3154 OPENSSL_free(s->session->psk_identity_hint);
3155 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3156 if (s->ctx->psk_identity_hint != NULL &&
3157 s->session->psk_identity_hint == NULL)
3159 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3160 ERR_R_MALLOC_FAILURE);
3164 if (s->session->psk_identity != NULL)
3165 OPENSSL_free(s->session->psk_identity);
3166 s->session->psk_identity = BUF_strdup(identity);
3167 if (s->session->psk_identity == NULL)
3169 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3170 ERR_R_MALLOC_FAILURE);
3174 s->session->master_key_length =
3175 s->method->ssl3_enc->generate_master_secret(s,
3176 s->session->master_key,
3177 psk_or_pre_ms, pre_ms_len);
3178 s2n(identity_len, p);
3179 memcpy(p, identity, identity_len);
3180 n = 2 + identity_len;
3183 OPENSSL_cleanse(identity, sizeof(identity));
3184 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3187 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3194 ssl3_send_alert(s, SSL3_AL_FATAL,
3195 SSL_AD_HANDSHAKE_FAILURE);
3196 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3197 ERR_R_INTERNAL_ERROR);
3201 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3202 s->state=SSL3_ST_CW_KEY_EXCH_B;
3205 /* SSL3_ST_CW_KEY_EXCH_B */
3206 return ssl_do_write(s);
3208 #ifndef OPENSSL_NO_ECDH
3209 BN_CTX_free(bn_ctx);
3210 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3211 if (clnt_ecdh != NULL)
3212 EC_KEY_free(clnt_ecdh);
3213 EVP_PKEY_free(srvr_pub_pkey);
3218 int ssl3_send_client_verify(SSL *s)
3221 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3223 EVP_PKEY_CTX *pctx=NULL;
3229 EVP_MD_CTX_init(&mctx);
3231 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3233 p= ssl_handshake_start(s);
3234 pkey=s->cert->key->privatekey;
3235 /* Create context from key and test if sha1 is allowed as digest */
3236 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3237 EVP_PKEY_sign_init(pctx);
3238 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3240 if (!SSL_USE_SIGALGS(s))
3241 s->method->ssl3_enc->cert_verify_mac(s,
3243 &(data[MD5_DIGEST_LENGTH]));
3249 /* For TLS v1.2 send signature algorithm and signature
3250 * using agreed digest and cached handshake records.
3252 if (SSL_USE_SIGALGS(s))
3256 const EVP_MD *md = s->cert->key->digest;
3257 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3259 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3261 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3262 ERR_R_INTERNAL_ERROR);
3267 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3270 if (!EVP_SignInit_ex(&mctx, md, NULL)
3271 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3272 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3274 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3280 if (!ssl3_digest_cached_records(s))
3284 #ifndef OPENSSL_NO_RSA
3285 if (pkey->type == EVP_PKEY_RSA)
3287 s->method->ssl3_enc->cert_verify_mac(s,
3290 if (RSA_sign(NID_md5_sha1, data,
3291 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3292 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3294 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3302 #ifndef OPENSSL_NO_DSA
3303 if (pkey->type == EVP_PKEY_DSA)
3305 if (!DSA_sign(pkey->save_type,
3306 &(data[MD5_DIGEST_LENGTH]),
3307 SHA_DIGEST_LENGTH,&(p[2]),
3308 (unsigned int *)&j,pkey->pkey.dsa))
3310 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3318 #ifndef OPENSSL_NO_ECDSA
3319 if (pkey->type == EVP_PKEY_EC)
3321 if (!ECDSA_sign(pkey->save_type,
3322 &(data[MD5_DIGEST_LENGTH]),
3323 SHA_DIGEST_LENGTH,&(p[2]),
3324 (unsigned int *)&j,pkey->pkey.ec))
3326 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3335 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3337 unsigned char signbuf[64];
3340 s->method->ssl3_enc->cert_verify_mac(s,
3341 NID_id_GostR3411_94,
3343 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3344 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3345 ERR_R_INTERNAL_ERROR);
3348 for (i=63,j=0; i>=0; j++, i--) {
3356 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3359 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3360 s->state=SSL3_ST_CW_CERT_VRFY_B;
3362 EVP_MD_CTX_cleanup(&mctx);
3363 EVP_PKEY_CTX_free(pctx);
3364 return ssl_do_write(s);
3366 EVP_MD_CTX_cleanup(&mctx);
3367 EVP_PKEY_CTX_free(pctx);
3371 /* Check a certificate can be used for client authentication. Currently
3372 * check cert exists, if we have a suitable digest for TLS 1.2 if
3373 * static DH client certificates can be used and optionally checks
3374 * suitability for Suite B.
3376 static int ssl3_check_client_certificate(SSL *s)
3378 unsigned long alg_k;
3379 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3381 /* If no suitable signature algorithm can't use certificate */
3382 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3384 /* If strict mode check suitability of chain before using it.
3385 * This also adjusts suite B digest if necessary.
3387 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3388 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3390 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3391 /* See if we can use client certificate for fixed DH */
3392 if (alg_k & (SSL_kDHr|SSL_kDHd))
3394 SESS_CERT *scert = s->session->sess_cert;
3395 int i = scert->peer_cert_type;
3396 EVP_PKEY *clkey = NULL, *spkey = NULL;
3397 clkey = s->cert->key->privatekey;
3398 /* If client key not DH assume it can be used */
3399 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3402 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3405 /* Compare server and client parameters */
3406 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3407 EVP_PKEY_free(spkey);
3411 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3416 int ssl3_send_client_certificate(SSL *s)
3419 EVP_PKEY *pkey=NULL;
3422 if (s->state == SSL3_ST_CW_CERT_A)
3424 /* Let cert callback update client certificates if required */
3425 if (s->cert->cert_cb)
3427 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3430 s->rwstate=SSL_X509_LOOKUP;
3435 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3438 s->rwstate=SSL_NOTHING;
3440 if (ssl3_check_client_certificate(s))
3441 s->state=SSL3_ST_CW_CERT_C;
3443 s->state=SSL3_ST_CW_CERT_B;
3446 /* We need to get a client cert */
3447 if (s->state == SSL3_ST_CW_CERT_B)
3449 /* If we get an error, we need to
3450 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3451 * We then get retied later */
3453 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3456 s->rwstate=SSL_X509_LOOKUP;
3459 s->rwstate=SSL_NOTHING;
3460 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3462 s->state=SSL3_ST_CW_CERT_B;
3463 if ( !SSL_use_certificate(s,x509) ||
3464 !SSL_use_PrivateKey(s,pkey))
3470 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3473 if (x509 != NULL) X509_free(x509);
3474 if (pkey != NULL) EVP_PKEY_free(pkey);
3475 if (i && !ssl3_check_client_certificate(s))
3479 if (s->version == SSL3_VERSION)
3481 s->s3->tmp.cert_req=0;
3482 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3487 s->s3->tmp.cert_req=2;
3491 /* Ok, we have a cert */
3492 s->state=SSL3_ST_CW_CERT_C;
3495 if (s->state == SSL3_ST_CW_CERT_C)
3497 s->state=SSL3_ST_CW_CERT_D;
3498 if (!ssl3_output_cert_chain(s,
3499 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3501 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3502 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3506 /* SSL3_ST_CW_CERT_D */
3507 return ssl_do_write(s);
3510 #define has_bits(i,m) (((i)&(m)) == (m))
3512 int ssl3_check_cert_and_algorithm(SSL *s)
3516 EVP_PKEY *pkey=NULL;
3518 #ifndef OPENSSL_NO_RSA
3521 #ifndef OPENSSL_NO_DH
3525 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3526 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3528 /* we don't have a certificate */
3529 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3532 sc=s->session->sess_cert;
3535 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3539 #ifndef OPENSSL_NO_RSA
3540 rsa=s->session->sess_cert->peer_rsa_tmp;
3542 #ifndef OPENSSL_NO_DH
3543 dh=s->session->sess_cert->peer_dh_tmp;
3546 /* This is the passed certificate */
3548 idx=sc->peer_cert_type;
3549 #ifndef OPENSSL_NO_ECDH
3550 if (idx == SSL_PKEY_ECC)
3552 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3554 { /* check failed */
3555 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3563 else if (alg_a & SSL_aECDSA)
3565 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3568 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3570 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3574 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3575 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3576 EVP_PKEY_free(pkey);
3579 /* Check that we have a certificate if we require one */
3580 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3582 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3585 #ifndef OPENSSL_NO_DSA
3586 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3588 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3592 #ifndef OPENSSL_NO_RSA
3593 if ((alg_k & SSL_kRSA) &&
3594 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3596 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3600 #ifndef OPENSSL_NO_DH
3601 if ((alg_k & SSL_kDHE) &&
3602 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3604 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3607 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3608 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3610 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3613 #ifndef OPENSSL_NO_DSA
3614 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3615 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3617 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3623 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3625 #ifndef OPENSSL_NO_RSA
3626 if (alg_k & SSL_kRSA)
3629 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3631 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3637 #ifndef OPENSSL_NO_DH
3638 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3641 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3643 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3650 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3656 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3661 /* Check to see if handshake is full or resumed. Usually this is just a
3662 * case of checking to see if a cache hit has occurred. In the case of
3663 * session tickets we have to check the next message to be sure.
3666 #ifndef OPENSSL_NO_TLSEXT
3667 # ifndef OPENSSL_NO_NEXTPROTONEG
3668 int ssl3_send_next_proto(SSL *s)
3670 unsigned int len, padding_len;
3673 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3675 len = s->next_proto_negotiated_len;
3676 padding_len = 32 - ((len + 2) % 32);
3677 d = (unsigned char *)s->init_buf->data;
3679 memcpy(d + 5, s->next_proto_negotiated, len);
3680 d[5 + len] = padding_len;
3681 memset(d + 6 + len, 0, padding_len);
3682 *(d++)=SSL3_MT_NEXT_PROTO;
3683 l2n3(2 + len + padding_len, d);
3684 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3685 s->init_num = 4 + 2 + len + padding_len;
3689 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3694 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3697 #ifndef OPENSSL_NO_ENGINE
3698 if (s->ctx->client_cert_engine)
3700 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3701 SSL_get_client_CA_list(s),
3702 px509, ppkey, NULL, NULL, NULL);
3707 if (s->ctx->client_cert_cb)
3708 i = s->ctx->client_cert_cb(s,px509,ppkey);