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);
734 * version indicates the negotiated version: for example from
735 * an SSLv2/v3 compatible client hello). The client_version
736 * field is the maximum version we permit and it is also
737 * used in RSA encrypted premaster secrets. Some servers can
738 * choke if we initially report a higher version then
739 * renegotiate to a lower one in the premaster secret. This
740 * didn't happen with TLS 1.0 as most servers supported it
741 * but it can with TLS 1.1 or later if the server only supports
744 * Possible scenario with previous logic:
745 * 1. Client hello indicates TLS 1.2
746 * 2. Server hello says TLS 1.0
747 * 3. RSA encrypted premaster secret uses 1.2.
748 * 4. Handhaked proceeds using TLS 1.0.
749 * 5. Server sends hello request to renegotiate.
750 * 6. Client hello indicates TLS v1.0 as we now
751 * know that is maximum server supports.
752 * 7. Server chokes on RSA encrypted premaster secret
753 * containing version 1.0.
755 * For interoperability it should be OK to always use the
756 * maximum version we support in client hello and then rely
757 * on the checking of version to ensure the servers isn't
758 * being inconsistent: for example initially negotiating with
759 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
760 * client_version in client hello and not resetting it to
761 * the negotiated version.
764 *(p++)=s->version>>8;
765 *(p++)=s->version&0xff;
766 s->client_version=s->version;
768 *(p++)=s->client_version>>8;
769 *(p++)=s->client_version&0xff;
773 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
780 i=s->session->session_id_length;
784 if (i > (int)sizeof(s->session->session_id))
786 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
789 memcpy(p,s->session->session_id,i);
793 /* cookie stuff for DTLS */
796 if ( s->d1->cookie_len > sizeof(s->d1->cookie))
798 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
801 *(p++) = s->d1->cookie_len;
802 memcpy(p, s->d1->cookie, s->d1->cookie_len);
803 p += s->d1->cookie_len;
806 /* Ciphers supported */
807 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
810 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
813 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
814 /* Some servers hang if client hello > 256 bytes
815 * as hack workaround chop number of supported ciphers
816 * to keep it well below this if we use TLS v1.2
818 if (TLS1_get_version(s) >= TLS1_2_VERSION
819 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
820 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
826 #ifdef OPENSSL_NO_COMP
830 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
833 j=sk_SSL_COMP_num(s->ctx->comp_methods);
837 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
841 *(p++)=0; /* Add the NULL method */
843 #ifndef OPENSSL_NO_TLSEXT
845 if (ssl_prepare_clienthello_tlsext(s) <= 0)
847 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
850 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
852 ssl3_send_alert(s,SSL3_AL_FATAL,al);
853 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
859 ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l);
860 s->state=SSL3_ST_CW_CLNT_HELLO_B;
863 /* SSL3_ST_CW_CLNT_HELLO_B */
864 return ssl_do_write(s);
869 int ssl3_get_server_hello(SSL *s)
871 STACK_OF(SSL_CIPHER) *sk;
875 int i,al=SSL_AD_INTERNAL_ERROR,ok;
878 #ifndef OPENSSL_NO_COMP
881 /* Hello verify request and/or server hello version may not
882 * match so set first packet if we're negotiating version.
887 n=s->method->ssl_get_message(s,
888 SSL3_ST_CR_SRVR_HELLO_A,
889 SSL3_ST_CR_SRVR_HELLO_B,
894 if (!ok) return((int)n);
899 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
901 if ( s->d1->send_cookie == 0)
903 s->s3->tmp.reuse_message = 1;
906 else /* already sent a cookie */
908 al=SSL_AD_UNEXPECTED_MESSAGE;
909 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
915 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
917 al=SSL_AD_UNEXPECTED_MESSAGE;
918 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
922 d=p=(unsigned char *)s->init_msg;
923 if (s->method->version == DTLS_ANY_VERSION)
925 /* Work out correct protocol version to use */
926 int hversion = (p[0] << 8)|p[1];
927 int options = s->options;
928 if (hversion == DTLS1_2_VERSION
929 && !(options & SSL_OP_NO_DTLSv1_2))
930 s->method = DTLSv1_2_client_method();
931 else if (tls1_suiteb(s))
933 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
934 s->version = hversion;
935 al = SSL_AD_PROTOCOL_VERSION;
938 else if (hversion == DTLS1_VERSION
939 && !(options & SSL_OP_NO_DTLSv1))
940 s->method = DTLSv1_client_method();
943 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
944 s->version = hversion;
945 al = SSL_AD_PROTOCOL_VERSION;
948 s->version = s->method->version;
951 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
953 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
954 s->version=(s->version&0xff00)|p[1];
955 al=SSL_AD_PROTOCOL_VERSION;
960 /* load the server hello data */
961 /* load the server random */
962 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
967 /* get the session-id */
970 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
972 al=SSL_AD_ILLEGAL_PARAMETER;
973 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
977 #ifndef OPENSSL_NO_TLSEXT
978 /* check if we want to resume the session based on external pre-shared secret */
979 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
981 SSL_CIPHER *pref_cipher=NULL;
982 s->session->master_key_length=sizeof(s->session->master_key);
983 if (s->tls_session_secret_cb(s, s->session->master_key,
984 &s->session->master_key_length,
986 s->tls_session_secret_cb_arg))
988 s->session->cipher = pref_cipher ?
989 pref_cipher : ssl_get_cipher_by_char(s, p+j);
993 #endif /* OPENSSL_NO_TLSEXT */
995 if (!s->hit && j != 0 && j == s->session->session_id_length
996 && memcmp(p,s->session->session_id,j) == 0)
998 if(s->sid_ctx_length != s->session->sid_ctx_length
999 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
1001 /* actually a client application bug */
1002 al=SSL_AD_ILLEGAL_PARAMETER;
1003 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
1008 /* a miss or crap from the other end */
1011 /* If we were trying for session-id reuse, make a new
1012 * SSL_SESSION so we don't stuff up other people */
1013 if (s->session->session_id_length > 0)
1015 if (!ssl_get_new_session(s,0))
1020 s->session->session_id_length=j;
1021 memcpy(s->session->session_id,p,j); /* j could be 0 */
1024 c=ssl_get_cipher_by_char(s,p);
1027 /* unknown cipher */
1028 al=SSL_AD_ILLEGAL_PARAMETER;
1029 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
1032 /* Set version disabled mask now we know version */
1033 if (!SSL_USE_TLS1_2_CIPHERS(s))
1034 ct->mask_ssl = SSL_TLSV1_2;
1037 /* If it is a disabled cipher we didn't send it in client hello,
1038 * so return an error.
1040 if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK))
1042 al=SSL_AD_ILLEGAL_PARAMETER;
1043 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1046 p+=ssl_put_cipher_by_char(s,NULL,NULL);
1048 sk=ssl_get_ciphers_by_id(s);
1049 i=sk_SSL_CIPHER_find(sk,c);
1052 /* we did not say we would use this cipher */
1053 al=SSL_AD_ILLEGAL_PARAMETER;
1054 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
1058 /* Depending on the session caching (internal/external), the cipher
1059 and/or cipher_id values may not be set. Make sure that
1060 cipher_id is set and use it for comparison. */
1061 if (s->session->cipher)
1062 s->session->cipher_id = s->session->cipher->id;
1063 if (s->hit && (s->session->cipher_id != c->id))
1065 /* Workaround is now obsolete */
1068 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
1071 al=SSL_AD_ILLEGAL_PARAMETER;
1072 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
1076 s->s3->tmp.new_cipher=c;
1077 /* Don't digest cached records if no sigalgs: we may need them for
1078 * client authentication.
1080 if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s))
1082 /* lets get the compression algorithm */
1084 #ifdef OPENSSL_NO_COMP
1087 al=SSL_AD_ILLEGAL_PARAMETER;
1088 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1091 /* If compression is disabled we'd better not try to resume a session
1092 * using compression.
1094 if (s->session->compress_meth != 0)
1096 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1101 if (s->hit && j != s->session->compress_meth)
1103 al=SSL_AD_ILLEGAL_PARAMETER;
1104 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1109 else if (!ssl_allow_compression(s))
1111 al=SSL_AD_ILLEGAL_PARAMETER;
1112 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1116 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1118 if ((j != 0) && (comp == NULL))
1120 al=SSL_AD_ILLEGAL_PARAMETER;
1121 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1126 s->s3->tmp.new_compression=comp;
1130 #ifndef OPENSSL_NO_TLSEXT
1132 if (!ssl_parse_serverhello_tlsext(s,&p,d,n))
1134 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1141 /* wrong packet length */
1142 al=SSL_AD_DECODE_ERROR;
1143 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1149 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1154 int ssl3_get_server_certificate(SSL *s)
1156 int al,i,ok,ret= -1;
1157 unsigned long n,nc,llen,l;
1159 const unsigned char *q,*p;
1161 STACK_OF(X509) *sk=NULL;
1163 EVP_PKEY *pkey=NULL;
1164 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1166 n=s->method->ssl_get_message(s,
1173 if (!ok) return((int)n);
1175 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1176 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1177 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1179 s->s3->tmp.reuse_message=1;
1183 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1185 al=SSL_AD_UNEXPECTED_MESSAGE;
1186 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1189 p=d=(unsigned char *)s->init_msg;
1191 if ((sk=sk_X509_new_null()) == NULL)
1193 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1200 al=SSL_AD_DECODE_ERROR;
1201 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1204 for (nc=0; nc<llen; )
1207 if ((l+nc+3) > llen)
1209 al=SSL_AD_DECODE_ERROR;
1210 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1215 x=d2i_X509(NULL,&q,l);
1218 al=SSL_AD_BAD_CERTIFICATE;
1219 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1224 al=SSL_AD_DECODE_ERROR;
1225 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1228 if (!sk_X509_push(sk,x))
1230 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1238 i=ssl_verify_cert_chain(s,sk);
1239 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1240 #ifndef OPENSSL_NO_KRB5
1241 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1242 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1243 #endif /* OPENSSL_NO_KRB5 */
1246 al=ssl_verify_alarm_type(s->verify_result);
1247 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1250 ERR_clear_error(); /* but we keep s->verify_result */
1253 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i);
1254 al = SSL_AD_HANDSHAKE_FAILURE;
1258 sc=ssl_sess_cert_new();
1259 if (sc == NULL) goto err;
1261 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1262 s->session->sess_cert=sc;
1265 /* Inconsistency alert: cert_chain does include the peer's
1266 * certificate, which we don't include in s3_srvr.c */
1267 x=sk_X509_value(sk,0);
1269 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1271 pkey=X509_get_pubkey(x);
1273 /* VRS: allow null cert if auth == KRB5 */
1274 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1275 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1279 fprintf(stderr,"pkey,x = %p, %p\n", pkey,x);
1280 fprintf(stderr,"ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1281 fprintf(stderr,"cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1282 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1283 #endif /* KSSL_DEBUG */
1285 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1289 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1290 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1294 i=ssl_cert_type(x,pkey);
1295 if (need_cert && i < 0)
1299 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1300 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1306 int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
1307 if (exp_idx >= 0 && i != exp_idx)
1310 al=SSL_AD_ILLEGAL_PARAMETER;
1311 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1312 SSL_R_WRONG_CERTIFICATE_TYPE);
1315 sc->peer_cert_type=i;
1316 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1317 /* Why would the following ever happen?
1318 * We just created sc a couple of lines ago. */
1319 if (sc->peer_pkeys[i].x509 != NULL)
1320 X509_free(sc->peer_pkeys[i].x509);
1321 sc->peer_pkeys[i].x509=x;
1322 sc->peer_key= &(sc->peer_pkeys[i]);
1324 if (s->session->peer != NULL)
1325 X509_free(s->session->peer);
1326 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1331 sc->peer_cert_type=i;
1334 if (s->session->peer != NULL)
1335 X509_free(s->session->peer);
1336 s->session->peer=NULL;
1338 s->session->verify_result = s->verify_result;
1345 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1348 EVP_PKEY_free(pkey);
1350 sk_X509_pop_free(sk,X509_free);
1354 int ssl3_get_key_exchange(SSL *s)
1356 #ifndef OPENSSL_NO_RSA
1357 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1360 unsigned char *param,*p;
1362 long i,param_len,n,alg_k,alg_a;
1363 EVP_PKEY *pkey=NULL;
1364 const EVP_MD *md = NULL;
1365 #ifndef OPENSSL_NO_RSA
1368 #ifndef OPENSSL_NO_DH
1371 #ifndef OPENSSL_NO_ECDH
1372 EC_KEY *ecdh = NULL;
1373 BN_CTX *bn_ctx = NULL;
1374 EC_POINT *srvr_ecpoint = NULL;
1376 int encoded_pt_len = 0;
1379 EVP_MD_CTX_init(&md_ctx);
1381 /* use same message size as in ssl3_get_certificate_request()
1382 * as ServerKeyExchange message may be skipped */
1383 n=s->method->ssl_get_message(s,
1384 SSL3_ST_CR_KEY_EXCH_A,
1385 SSL3_ST_CR_KEY_EXCH_B,
1389 if (!ok) return((int)n);
1391 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1393 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1396 * Can't skip server key exchange if this is an ephemeral
1399 if (alg_k & (SSL_kDHE|SSL_kECDHE))
1401 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
1402 al = SSL_AD_UNEXPECTED_MESSAGE;
1405 #ifndef OPENSSL_NO_PSK
1406 /* In plain PSK ciphersuite, ServerKeyExchange can be
1407 omitted if no identity hint is sent. Set
1408 session->sess_cert anyway to avoid problems
1410 if (alg_k & SSL_kPSK)
1412 s->session->sess_cert=ssl_sess_cert_new();
1413 if (s->ctx->psk_identity_hint)
1414 OPENSSL_free(s->ctx->psk_identity_hint);
1415 s->ctx->psk_identity_hint = NULL;
1418 s->s3->tmp.reuse_message=1;
1422 param=p=(unsigned char *)s->init_msg;
1423 if (s->session->sess_cert != NULL)
1425 #ifndef OPENSSL_NO_RSA
1426 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1428 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1429 s->session->sess_cert->peer_rsa_tmp=NULL;
1432 #ifndef OPENSSL_NO_DH
1433 if (s->session->sess_cert->peer_dh_tmp)
1435 DH_free(s->session->sess_cert->peer_dh_tmp);
1436 s->session->sess_cert->peer_dh_tmp=NULL;
1439 #ifndef OPENSSL_NO_ECDH
1440 if (s->session->sess_cert->peer_ecdh_tmp)
1442 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1443 s->session->sess_cert->peer_ecdh_tmp=NULL;
1449 s->session->sess_cert=ssl_sess_cert_new();
1452 /* Total length of the parameters including the length prefix */
1455 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1457 al=SSL_AD_DECODE_ERROR;
1459 #ifndef OPENSSL_NO_PSK
1460 if (alg_k & SSL_kPSK)
1462 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1467 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1468 SSL_R_LENGTH_TOO_SHORT);
1473 /* Store PSK identity hint for later use, hint is used
1474 * in ssl3_send_client_key_exchange. Assume that the
1475 * maximum length of a PSK identity hint can be as
1476 * long as the maximum length of a PSK identity. */
1477 if (i > PSK_MAX_IDENTITY_LEN)
1479 al=SSL_AD_HANDSHAKE_FAILURE;
1480 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1481 SSL_R_DATA_LENGTH_TOO_LONG);
1484 if (i > n - param_len)
1486 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1487 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1492 /* If received PSK identity hint contains NULL
1493 * characters, the hint is truncated from the first
1494 * NULL. p may not be ending with NULL, so create a
1495 * NULL-terminated string. */
1496 memcpy(tmp_id_hint, p, i);
1497 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1498 if (s->ctx->psk_identity_hint != NULL)
1499 OPENSSL_free(s->ctx->psk_identity_hint);
1500 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1501 if (s->ctx->psk_identity_hint == NULL)
1503 al=SSL_AD_HANDSHAKE_FAILURE;
1504 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1512 #endif /* !OPENSSL_NO_PSK */
1513 #ifndef OPENSSL_NO_SRP
1514 if (alg_k & SSL_kSRP)
1519 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1520 SSL_R_LENGTH_TOO_SHORT);
1525 if (i > n - param_len)
1527 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1532 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1534 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1540 if (2 > n - param_len)
1542 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1543 SSL_R_LENGTH_TOO_SHORT);
1550 if (i > n - param_len)
1552 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1557 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1559 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1565 if (1 > n - param_len)
1567 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1568 SSL_R_LENGTH_TOO_SHORT);
1573 i = (unsigned int)(p[0]);
1576 if (i > n - param_len)
1578 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1583 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1585 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1590 if (2 > n - param_len)
1592 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1593 SSL_R_LENGTH_TOO_SHORT);
1600 if (i > n - param_len)
1602 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1607 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1609 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1615 if (!srp_verify_server_param(s, &al))
1617 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1621 /* We must check if there is a certificate */
1622 #ifndef OPENSSL_NO_RSA
1623 if (alg_a & SSL_aRSA)
1624 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1629 #ifndef OPENSSL_NO_DSA
1630 else if (alg_a & SSL_aDSS)
1631 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1635 #endif /* !OPENSSL_NO_SRP */
1636 #ifndef OPENSSL_NO_RSA
1637 if (alg_k & SSL_kRSA)
1639 /* Temporary RSA keys only allowed in export ciphersuites */
1640 if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher))
1642 al=SSL_AD_UNEXPECTED_MESSAGE;
1643 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1646 if ((rsa=RSA_new()) == NULL)
1648 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1655 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1656 SSL_R_LENGTH_TOO_SHORT);
1661 if (i > n - param_len)
1663 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1668 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1670 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1675 if (2 > n - param_len)
1677 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1678 SSL_R_LENGTH_TOO_SHORT);
1685 if (i > n - param_len)
1687 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1692 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1694 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1700 /* this should be because we are using an export cipher */
1701 if (alg_a & SSL_aRSA)
1702 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1705 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1708 s->session->sess_cert->peer_rsa_tmp=rsa;
1711 #else /* OPENSSL_NO_RSA */
1715 #ifndef OPENSSL_NO_DH
1716 else if (alg_k & SSL_kDHE)
1718 if ((dh=DH_new()) == NULL)
1720 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1727 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1728 SSL_R_LENGTH_TOO_SHORT);
1733 if (i > n - param_len)
1735 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1740 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1742 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1747 if (2 > n - param_len)
1749 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1750 SSL_R_LENGTH_TOO_SHORT);
1757 if (i > n - param_len)
1759 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1764 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1766 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1771 if (2 > n - param_len)
1773 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1774 SSL_R_LENGTH_TOO_SHORT);
1781 if (i > n - param_len)
1783 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1788 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1790 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1796 if (!ssl_security(s, SSL_SECOP_TMP_DH,
1797 DH_security_bits(dh), 0, dh))
1799 al=SSL_AD_HANDSHAKE_FAILURE;
1800 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL);
1804 #ifndef OPENSSL_NO_RSA
1805 if (alg_a & SSL_aRSA)
1806 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1811 #ifndef OPENSSL_NO_DSA
1812 else if (alg_a & SSL_aDSS)
1813 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1815 /* else anonymous DH, so no certificate or pkey. */
1817 s->session->sess_cert->peer_dh_tmp=dh;
1820 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1822 al=SSL_AD_ILLEGAL_PARAMETER;
1823 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1826 #endif /* !OPENSSL_NO_DH */
1828 #ifndef OPENSSL_NO_ECDH
1829 else if (alg_k & SSL_kECDHE)
1832 const EC_GROUP *group;
1834 if ((ecdh=EC_KEY_new()) == NULL)
1836 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1840 /* Extract elliptic curve parameters and the
1841 * server's ephemeral ECDH public key.
1842 * Keep accumulating lengths of various components in
1843 * param_len and make sure it never exceeds n.
1846 /* XXX: For now we only support named (not generic) curves
1847 * and the ECParameters in this case is just three bytes. We
1848 * also need one byte for the length of the encoded point
1853 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1854 SSL_R_LENGTH_TOO_SHORT);
1857 /* Check curve is one of our preferences, if not server has
1858 * sent an invalid curve. ECParameters is 3 bytes.
1860 if (!tls1_check_curve(s, p, 3))
1862 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_CURVE);
1866 if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)
1868 al=SSL_AD_INTERNAL_ERROR;
1869 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1873 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1876 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1879 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1881 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1884 EC_GROUP_free(ngroup);
1886 group = EC_KEY_get0_group(ecdh);
1888 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1889 (EC_GROUP_get_degree(group) > 163))
1891 al=SSL_AD_EXPORT_RESTRICTION;
1892 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1898 /* Next, get the encoded ECPoint */
1899 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1900 ((bn_ctx = BN_CTX_new()) == NULL))
1902 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1906 encoded_pt_len = *p; /* length of encoded point */
1909 if ((encoded_pt_len > n - param_len) ||
1910 (EC_POINT_oct2point(group, srvr_ecpoint,
1911 p, encoded_pt_len, bn_ctx) == 0))
1913 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1916 param_len += encoded_pt_len;
1921 /* The ECC/TLS specification does not mention
1922 * the use of DSA to sign ECParameters in the server
1923 * key exchange message. We do support RSA and ECDSA.
1926 #ifndef OPENSSL_NO_RSA
1927 else if (alg_a & SSL_aRSA)
1928 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1930 #ifndef OPENSSL_NO_ECDSA
1931 else if (alg_a & SSL_aECDSA)
1932 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1934 /* else anonymous ECDH, so no certificate or pkey. */
1935 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1936 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1938 BN_CTX_free(bn_ctx);
1940 EC_POINT_free(srvr_ecpoint);
1941 srvr_ecpoint = NULL;
1945 al=SSL_AD_UNEXPECTED_MESSAGE;
1946 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1949 #endif /* !OPENSSL_NO_ECDH */
1952 /* p points to the next byte, there are 'n' bytes left */
1954 /* if it was signed, check the signature */
1957 if (SSL_USE_SIGALGS(s))
1962 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1963 SSL_R_LENGTH_TOO_SHORT);
1966 rv = tls12_check_peer_sigalg(&md, s, p, pkey);
1974 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1984 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1985 SSL_R_LENGTH_TOO_SHORT);
1990 j=EVP_PKEY_size(pkey);
1992 /* Check signature length. If n is 0 then signature is empty */
1993 if ((i != n) || (n > j) || (n <= 0))
1995 /* wrong packet length */
1996 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
2000 #ifndef OPENSSL_NO_RSA
2001 if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s))
2008 for (num=2; num > 0; num--)
2010 EVP_MD_CTX_set_flags(&md_ctx,
2011 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
2012 EVP_DigestInit_ex(&md_ctx,(num == 2)
2013 ?s->ctx->md5:s->ctx->sha1, NULL);
2014 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2015 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2016 EVP_DigestUpdate(&md_ctx,param,param_len);
2017 EVP_DigestFinal_ex(&md_ctx,q,&size);
2021 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
2025 al=SSL_AD_DECRYPT_ERROR;
2026 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
2032 al=SSL_AD_DECRYPT_ERROR;
2033 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2040 EVP_VerifyInit_ex(&md_ctx, md, NULL);
2041 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
2042 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
2043 EVP_VerifyUpdate(&md_ctx,param,param_len);
2044 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
2047 al=SSL_AD_DECRYPT_ERROR;
2048 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
2055 /* aNULL, aSRP or kPSK do not need public keys */
2056 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK))
2058 /* Might be wrong key type, check it */
2059 if (ssl3_check_cert_and_algorithm(s))
2060 /* Otherwise this shouldn't happen */
2061 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2064 /* still data left over */
2067 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
2071 EVP_PKEY_free(pkey);
2072 EVP_MD_CTX_cleanup(&md_ctx);
2075 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2077 EVP_PKEY_free(pkey);
2078 #ifndef OPENSSL_NO_RSA
2082 #ifndef OPENSSL_NO_DH
2086 #ifndef OPENSSL_NO_ECDH
2087 BN_CTX_free(bn_ctx);
2088 EC_POINT_free(srvr_ecpoint);
2092 EVP_MD_CTX_cleanup(&md_ctx);
2096 int ssl3_get_certificate_request(SSL *s)
2099 unsigned long n,nc,l;
2100 unsigned int llen, ctype_num,i;
2102 const unsigned char *p,*q;
2104 STACK_OF(X509_NAME) *ca_sk=NULL;
2106 n=s->method->ssl_get_message(s,
2107 SSL3_ST_CR_CERT_REQ_A,
2108 SSL3_ST_CR_CERT_REQ_B,
2113 if (!ok) return((int)n);
2115 s->s3->tmp.cert_req=0;
2117 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
2119 s->s3->tmp.reuse_message=1;
2120 /* If we get here we don't need any cached handshake records
2121 * as we wont be doing client auth.
2123 if (s->s3->handshake_buffer)
2125 if (!ssl3_digest_cached_records(s))
2131 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
2133 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2134 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
2138 /* TLS does not like anon-DH with client cert */
2139 if (s->version > SSL3_VERSION)
2141 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
2143 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2144 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
2149 p=d=(unsigned char *)s->init_msg;
2151 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
2153 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2157 /* get the certificate types */
2159 if (s->cert->ctypes)
2161 OPENSSL_free(s->cert->ctypes);
2162 s->cert->ctypes = NULL;
2164 if (ctype_num > SSL3_CT_NUMBER)
2166 /* If we exceed static buffer copy all to cert structure */
2167 s->cert->ctypes = OPENSSL_malloc(ctype_num);
2168 if (s->cert->ctypes == NULL)
2170 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2173 memcpy(s->cert->ctypes, p, ctype_num);
2174 s->cert->ctype_num = (size_t)ctype_num;
2175 ctype_num=SSL3_CT_NUMBER;
2177 for (i=0; i<ctype_num; i++)
2178 s->s3->tmp.ctype[i]= p[i];
2180 if (SSL_USE_SIGALGS(s))
2183 /* Check we have enough room for signature algorithms and
2184 * following length value.
2186 if ((unsigned long)(p - d + llen + 2) > n)
2188 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2189 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
2192 /* Clear certificate digests and validity flags */
2193 for (i = 0; i < SSL_PKEY_NUM; i++)
2195 s->cert->pkeys[i].digest = NULL;
2196 s->cert->pkeys[i].valid_flags = 0;
2198 if ((llen & 1) || !tls1_save_sigalgs(s, p, llen))
2200 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2201 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
2204 if (!tls1_process_sigalgs(s))
2206 ssl3_send_alert(s,SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
2207 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
2213 /* get the CA RDNs */
2218 out=fopen("/tmp/vsign.der","w");
2219 fwrite(p,1,llen,out);
2224 if ((unsigned long)(p - d + llen) != n)
2226 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2227 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
2231 for (nc=0; nc<llen; )
2234 if ((l+nc+2) > llen)
2236 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
2237 goto cont; /* netscape bugs */
2238 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2239 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
2245 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
2247 /* If netscape tolerance is on, ignore errors */
2248 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2252 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2253 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2260 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2261 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2264 if (!sk_X509_NAME_push(ca_sk,xn))
2266 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2280 /* we should setup a certificate to return.... */
2281 s->s3->tmp.cert_req=1;
2282 s->s3->tmp.ctype_num=ctype_num;
2283 if (s->s3->tmp.ca_names != NULL)
2284 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2285 s->s3->tmp.ca_names=ca_sk;
2290 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2294 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2296 return(X509_NAME_cmp(*a,*b));
2298 #ifndef OPENSSL_NO_TLSEXT
2299 int ssl3_get_new_session_ticket(SSL *s)
2301 int ok,al,ret=0, ticklen;
2303 const unsigned char *p;
2306 n=s->method->ssl_get_message(s,
2307 SSL3_ST_CR_SESSION_TICKET_A,
2308 SSL3_ST_CR_SESSION_TICKET_B,
2309 SSL3_MT_NEWSESSION_TICKET,
2318 /* need at least ticket_lifetime_hint + ticket length */
2319 al = SSL_AD_DECODE_ERROR;
2320 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2324 p=d=(unsigned char *)s->init_msg;
2325 n2l(p, s->session->tlsext_tick_lifetime_hint);
2327 /* ticket_lifetime_hint + ticket_length + ticket */
2328 if (ticklen + 6 != n)
2330 al = SSL_AD_DECODE_ERROR;
2331 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2334 if (s->session->tlsext_tick)
2336 OPENSSL_free(s->session->tlsext_tick);
2337 s->session->tlsext_ticklen = 0;
2339 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2340 if (!s->session->tlsext_tick)
2342 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2345 memcpy(s->session->tlsext_tick, p, ticklen);
2346 s->session->tlsext_ticklen = ticklen;
2347 /* There are two ways to detect a resumed ticket session.
2348 * One is to set an appropriate session ID and then the server
2349 * must return a match in ServerHello. This allows the normal
2350 * client session ID matching to work and we know much
2351 * earlier that the ticket has been accepted.
2353 * The other way is to set zero length session ID when the
2354 * ticket is presented and rely on the handshake to determine
2355 * session resumption.
2357 * We choose the former approach because this fits in with
2358 * assumptions elsewhere in OpenSSL. The session ID is set
2359 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2362 EVP_Digest(p, ticklen,
2363 s->session->session_id, &s->session->session_id_length,
2364 #ifndef OPENSSL_NO_SHA256
2365 EVP_sha256(), NULL);
2372 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2377 int ssl3_get_cert_status(SSL *s)
2380 unsigned long resplen,n;
2381 const unsigned char *p;
2383 n=s->method->ssl_get_message(s,
2384 SSL3_ST_CR_CERT_STATUS_A,
2385 SSL3_ST_CR_CERT_STATUS_B,
2386 SSL3_MT_CERTIFICATE_STATUS,
2390 if (!ok) return((int)n);
2393 /* need at least status type + length */
2394 al = SSL_AD_DECODE_ERROR;
2395 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2398 p = (unsigned char *)s->init_msg;
2399 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2401 al = SSL_AD_DECODE_ERROR;
2402 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2406 if (resplen + 4 != n)
2408 al = SSL_AD_DECODE_ERROR;
2409 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2412 if (s->tlsext_ocsp_resp)
2413 OPENSSL_free(s->tlsext_ocsp_resp);
2414 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2415 if (!s->tlsext_ocsp_resp)
2417 al = SSL_AD_INTERNAL_ERROR;
2418 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2421 s->tlsext_ocsp_resplen = resplen;
2422 if (s->ctx->tlsext_status_cb)
2425 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2428 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2429 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2434 al = SSL_AD_INTERNAL_ERROR;
2435 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2441 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2446 int ssl3_get_server_done(SSL *s)
2451 n=s->method->ssl_get_message(s,
2452 SSL3_ST_CR_SRVR_DONE_A,
2453 SSL3_ST_CR_SRVR_DONE_B,
2454 SSL3_MT_SERVER_DONE,
2455 30, /* should be very small, like 0 :-) */
2458 if (!ok) return((int)n);
2461 /* should contain no data */
2462 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2463 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2471 int ssl3_send_client_key_exchange(SSL *s)
2475 unsigned long alg_k;
2476 #ifndef OPENSSL_NO_RSA
2478 EVP_PKEY *pkey=NULL;
2480 #ifndef OPENSSL_NO_KRB5
2482 #endif /* OPENSSL_NO_KRB5 */
2483 #ifndef OPENSSL_NO_ECDH
2484 EC_KEY *clnt_ecdh = NULL;
2485 const EC_POINT *srvr_ecpoint = NULL;
2486 EVP_PKEY *srvr_pub_pkey = NULL;
2487 unsigned char *encodedPoint = NULL;
2488 int encoded_pt_len = 0;
2489 BN_CTX * bn_ctx = NULL;
2492 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2494 p = ssl_handshake_start(s);
2496 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2498 /* Fool emacs indentation */
2500 #ifndef OPENSSL_NO_RSA
2501 else if (alg_k & SSL_kRSA)
2504 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2506 if (s->session->sess_cert == NULL)
2508 /* We should always have a server certificate with SSL_kRSA. */
2509 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2513 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2514 rsa=s->session->sess_cert->peer_rsa_tmp;
2517 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2518 if ((pkey == NULL) ||
2519 (pkey->type != EVP_PKEY_RSA) ||
2520 (pkey->pkey.rsa == NULL))
2522 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2526 EVP_PKEY_free(pkey);
2529 tmp_buf[0]=s->client_version>>8;
2530 tmp_buf[1]=s->client_version&0xff;
2531 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2534 s->session->master_key_length=sizeof tmp_buf;
2537 /* Fix buf for TLS and beyond */
2538 if (s->version > SSL3_VERSION)
2540 n=RSA_public_encrypt(sizeof tmp_buf,
2541 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2543 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2544 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2548 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2552 /* Fix buf for TLS and beyond */
2553 if (s->version > SSL3_VERSION)
2559 s->session->master_key_length=
2560 s->method->ssl3_enc->generate_master_secret(s,
2561 s->session->master_key,
2562 tmp_buf,sizeof tmp_buf);
2563 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2566 #ifndef OPENSSL_NO_KRB5
2567 else if (alg_k & SSL_kKRB5)
2569 krb5_error_code krb5rc;
2570 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2571 /* krb5_data krb5_ap_req; */
2572 krb5_data *enc_ticket;
2573 krb5_data authenticator, *authp = NULL;
2574 EVP_CIPHER_CTX ciph_ctx;
2575 const EVP_CIPHER *enc = NULL;
2576 unsigned char iv[EVP_MAX_IV_LENGTH];
2577 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2578 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2579 + EVP_MAX_IV_LENGTH];
2580 int padl, outl = sizeof(epms);
2582 EVP_CIPHER_CTX_init(&ciph_ctx);
2585 fprintf(stderr,"ssl3_send_client_key_exchange(%lx & %lx)\n",
2587 #endif /* KSSL_DEBUG */
2591 if (KRB5SENDAUTH) authp = &authenticator;
2592 #endif /* KRB5SENDAUTH */
2594 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2596 enc = kssl_map_enc(kssl_ctx->enctype);
2601 fprintf(stderr,"kssl_cget_tkt rtn %d\n", krb5rc);
2602 if (krb5rc && kssl_err.text)
2603 fprintf(stderr,"kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2605 #endif /* KSSL_DEBUG */
2609 ssl3_send_alert(s,SSL3_AL_FATAL,
2610 SSL_AD_HANDSHAKE_FAILURE);
2611 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2617 * 20010406 VRS - Earlier versions used KRB5 AP_REQ
2618 * in place of RFC 2712 KerberosWrapper, as in:
2620 * Send ticket (copy to *p, set n = length)
2621 * n = krb5_ap_req.length;
2622 * memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2623 * if (krb5_ap_req.data)
2624 * kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2626 * Now using real RFC 2712 KerberosWrapper
2627 * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2628 * Note: 2712 "opaque" types are here replaced
2629 * with a 2-byte length followed by the value.
2631 * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2632 * Where "xx xx" = length bytes. Shown here with
2633 * optional authenticator omitted.
2636 /* KerberosWrapper.Ticket */
2637 s2n(enc_ticket->length,p);
2638 memcpy(p, enc_ticket->data, enc_ticket->length);
2639 p+= enc_ticket->length;
2640 n = enc_ticket->length + 2;
2642 /* KerberosWrapper.Authenticator */
2643 if (authp && authp->length)
2645 s2n(authp->length,p);
2646 memcpy(p, authp->data, authp->length);
2648 n+= authp->length + 2;
2656 s2n(0,p);/* null authenticator length */
2660 tmp_buf[0]=s->client_version>>8;
2661 tmp_buf[1]=s->client_version&0xff;
2662 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2666 * 20010420 VRS. Tried it this way; failed.
2667 * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2668 * EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2669 * kssl_ctx->length);
2670 * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2673 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2674 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2676 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2678 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2680 if (outl > (int)sizeof epms)
2682 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2685 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2687 /* KerberosWrapper.EncryptedPreMasterSecret */
2689 memcpy(p, epms, outl);
2693 s->session->master_key_length=
2694 s->method->ssl3_enc->generate_master_secret(s,
2695 s->session->master_key,
2696 tmp_buf, sizeof tmp_buf);
2698 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2699 OPENSSL_cleanse(epms, outl);
2702 #ifndef OPENSSL_NO_DH
2703 else if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
2705 DH *dh_srvr,*dh_clnt;
2706 SESS_CERT *scert = s->session->sess_cert;
2710 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2711 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2715 if (scert->peer_dh_tmp != NULL)
2716 dh_srvr=scert->peer_dh_tmp;
2719 /* we get them from the cert */
2720 int idx = scert->peer_cert_type;
2721 EVP_PKEY *spkey = NULL;
2724 spkey = X509_get_pubkey(
2725 scert->peer_pkeys[idx].x509);
2728 dh_srvr = EVP_PKEY_get1_DH(spkey);
2729 EVP_PKEY_free(spkey);
2731 if (dh_srvr == NULL)
2733 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2734 ERR_R_INTERNAL_ERROR);
2738 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2740 /* Use client certificate key */
2741 EVP_PKEY *clkey = s->cert->key->privatekey;
2744 dh_clnt = EVP_PKEY_get1_DH(clkey);
2745 if (dh_clnt == NULL)
2747 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2748 ERR_R_INTERNAL_ERROR);
2754 /* generate a new random key */
2755 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2757 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2760 if (!DH_generate_key(dh_clnt))
2762 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2768 /* use the 'p' output buffer for the DH key, but
2769 * make sure to clear it out afterwards */
2771 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2772 if (scert->peer_dh_tmp == NULL)
2777 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2782 /* generate master key from the result */
2783 s->session->master_key_length=
2784 s->method->ssl3_enc->generate_master_secret(s,
2785 s->session->master_key,p,n);
2789 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
2793 /* send off the data */
2794 n=BN_num_bytes(dh_clnt->pub_key);
2796 BN_bn2bin(dh_clnt->pub_key,p);
2802 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2806 #ifndef OPENSSL_NO_ECDH
2807 else if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe))
2809 const EC_GROUP *srvr_group = NULL;
2811 int ecdh_clnt_cert = 0;
2814 if (s->session->sess_cert == NULL)
2816 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2817 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2821 /* Did we send out the client's
2822 * ECDH share for use in premaster
2823 * computation as part of client certificate?
2824 * If so, set ecdh_clnt_cert to 1.
2826 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2829 * XXX: For now, we do not support client
2830 * authentication using ECDH certificates.
2831 * To add such support, one needs to add
2832 * code that checks for appropriate
2833 * conditions and sets ecdh_clnt_cert to 1.
2834 * For example, the cert have an ECC
2835 * key on the same curve as the server's
2836 * and the key should be authorized for
2839 * One also needs to add code in ssl3_connect
2840 * to skip sending the certificate verify
2843 * if ((s->cert->key->privatekey != NULL) &&
2844 * (s->cert->key->privatekey->type ==
2845 * EVP_PKEY_EC) && ...)
2846 * ecdh_clnt_cert = 1;
2850 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2852 tkey = s->session->sess_cert->peer_ecdh_tmp;
2856 /* Get the Server Public Key from Cert */
2857 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2858 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2859 if ((srvr_pub_pkey == NULL) ||
2860 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2861 (srvr_pub_pkey->pkey.ec == NULL))
2863 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2864 ERR_R_INTERNAL_ERROR);
2868 tkey = srvr_pub_pkey->pkey.ec;
2871 srvr_group = EC_KEY_get0_group(tkey);
2872 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2874 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2876 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2877 ERR_R_INTERNAL_ERROR);
2881 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2883 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2887 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2889 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2894 /* Reuse key info from our certificate
2895 * We only need our private key to perform
2896 * the ECDH computation.
2898 const BIGNUM *priv_key;
2899 tkey = s->cert->key->privatekey->pkey.ec;
2900 priv_key = EC_KEY_get0_private_key(tkey);
2901 if (priv_key == NULL)
2903 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2906 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2908 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2914 /* Generate a new ECDH key pair */
2915 if (!(EC_KEY_generate_key(clnt_ecdh)))
2917 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2922 /* use the 'p' output buffer for the ECDH key, but
2923 * make sure to clear it out afterwards
2926 field_size = EC_GROUP_get_degree(srvr_group);
2927 if (field_size <= 0)
2929 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2933 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2936 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2941 /* generate master key from the result */
2942 s->session->master_key_length = s->method->ssl3_enc \
2943 -> generate_master_secret(s,
2944 s->session->master_key,
2947 memset(p, 0, n); /* clean up */
2951 /* Send empty client key exch message */
2956 /* First check the size of encoding and
2957 * allocate memory accordingly.
2960 EC_POINT_point2oct(srvr_group,
2961 EC_KEY_get0_public_key(clnt_ecdh),
2962 POINT_CONVERSION_UNCOMPRESSED,
2965 encodedPoint = (unsigned char *)
2966 OPENSSL_malloc(encoded_pt_len *
2967 sizeof(unsigned char));
2968 bn_ctx = BN_CTX_new();
2969 if ((encodedPoint == NULL) ||
2972 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2976 /* Encode the public key */
2977 n = EC_POINT_point2oct(srvr_group,
2978 EC_KEY_get0_public_key(clnt_ecdh),
2979 POINT_CONVERSION_UNCOMPRESSED,
2980 encodedPoint, encoded_pt_len, bn_ctx);
2982 *p = n; /* length of encoded point */
2983 /* Encoded point will be copied here */
2985 /* copy the point */
2986 memcpy((unsigned char *)p, encodedPoint, n);
2987 /* increment n to account for length field */
2991 /* Free allocated memory */
2992 BN_CTX_free(bn_ctx);
2993 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2994 if (clnt_ecdh != NULL)
2995 EC_KEY_free(clnt_ecdh);
2996 EVP_PKEY_free(srvr_pub_pkey);
2998 #endif /* !OPENSSL_NO_ECDH */
2999 else if (alg_k & SSL_kGOST)
3001 /* GOST key exchange message creation */
3002 EVP_PKEY_CTX *pkey_ctx;
3005 unsigned int md_len;
3007 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
3008 EVP_MD_CTX *ukm_hash;
3011 /* Get server sertificate PKEY and create ctx from it */
3012 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
3014 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
3016 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
3020 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
3021 /* If we have send a certificate, and certificate key
3023 * parameters match those of server certificate, use
3024 * certificate key for key exchange
3027 /* Otherwise, generate ephemeral key pair */
3029 EVP_PKEY_encrypt_init(pkey_ctx);
3030 /* Generate session key */
3031 RAND_bytes(premaster_secret,32);
3032 /* If we have client certificate, use its secret as peer key */
3033 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
3034 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
3035 /* If there was an error - just ignore it. Ephemeral key
3041 /* Compute shared IV and store it in algorithm-specific
3043 ukm_hash = EVP_MD_CTX_create();
3044 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
3045 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
3046 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
3047 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
3048 EVP_MD_CTX_destroy(ukm_hash);
3049 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
3051 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3055 /* Make GOST keytransport blob message */
3056 /*Encapsulate it into sequence */
3057 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
3059 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
3060 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3067 *(p++)= msglen & 0xff;
3072 *(p++)= msglen & 0xff;
3075 memcpy(p, tmp, msglen);
3076 /* Check if pubkey from client certificate was used */
3077 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
3079 /* Set flag "skip certificate verify" */
3080 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3082 EVP_PKEY_CTX_free(pkey_ctx);
3083 s->session->master_key_length=
3084 s->method->ssl3_enc->generate_master_secret(s,
3085 s->session->master_key,premaster_secret,32);
3086 EVP_PKEY_free(pub_key);
3089 #ifndef OPENSSL_NO_SRP
3090 else if (alg_k & SSL_kSRP)
3092 if (s->srp_ctx.A != NULL)
3094 /* send off the data */
3095 n=BN_num_bytes(s->srp_ctx.A);
3097 BN_bn2bin(s->srp_ctx.A,p);
3102 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3105 if (s->session->srp_username != NULL)
3106 OPENSSL_free(s->session->srp_username);
3107 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
3108 if (s->session->srp_username == NULL)
3110 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3111 ERR_R_MALLOC_FAILURE);
3115 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
3117 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
3122 #ifndef OPENSSL_NO_PSK
3123 else if (alg_k & SSL_kPSK)
3125 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes
3126 * to return a \0-terminated identity. The last byte
3127 * is for us for simulating strnlen. */
3128 char identity[PSK_MAX_IDENTITY_LEN + 2];
3129 size_t identity_len;
3130 unsigned char *t = NULL;
3131 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
3132 unsigned int pre_ms_len = 0, psk_len = 0;
3136 if (s->psk_client_callback == NULL)
3138 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3139 SSL_R_PSK_NO_CLIENT_CB);
3143 memset(identity, 0, sizeof(identity));
3144 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
3145 identity, sizeof(identity) - 1,
3146 psk_or_pre_ms, sizeof(psk_or_pre_ms));
3147 if (psk_len > PSK_MAX_PSK_LEN)
3149 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3150 ERR_R_INTERNAL_ERROR);
3153 else if (psk_len == 0)
3155 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3156 SSL_R_PSK_IDENTITY_NOT_FOUND);
3159 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0';
3160 identity_len = strlen(identity);
3161 if (identity_len > PSK_MAX_IDENTITY_LEN)
3163 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3164 ERR_R_INTERNAL_ERROR);
3167 /* create PSK pre_master_secret */
3168 pre_ms_len = 2+psk_len+2+psk_len;
3170 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
3172 memset(t, 0, psk_len);
3176 if (s->session->psk_identity_hint != NULL)
3177 OPENSSL_free(s->session->psk_identity_hint);
3178 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
3179 if (s->ctx->psk_identity_hint != NULL &&
3180 s->session->psk_identity_hint == NULL)
3182 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3183 ERR_R_MALLOC_FAILURE);
3187 if (s->session->psk_identity != NULL)
3188 OPENSSL_free(s->session->psk_identity);
3189 s->session->psk_identity = BUF_strdup(identity);
3190 if (s->session->psk_identity == NULL)
3192 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3193 ERR_R_MALLOC_FAILURE);
3197 s->session->master_key_length =
3198 s->method->ssl3_enc->generate_master_secret(s,
3199 s->session->master_key,
3200 psk_or_pre_ms, pre_ms_len);
3201 s2n(identity_len, p);
3202 memcpy(p, identity, identity_len);
3203 n = 2 + identity_len;
3206 OPENSSL_cleanse(identity, sizeof(identity));
3207 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
3210 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
3217 ssl3_send_alert(s, SSL3_AL_FATAL,
3218 SSL_AD_HANDSHAKE_FAILURE);
3219 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
3220 ERR_R_INTERNAL_ERROR);
3224 ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n);
3225 s->state=SSL3_ST_CW_KEY_EXCH_B;
3228 /* SSL3_ST_CW_KEY_EXCH_B */
3229 return ssl_do_write(s);
3231 #ifndef OPENSSL_NO_ECDH
3232 BN_CTX_free(bn_ctx);
3233 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
3234 if (clnt_ecdh != NULL)
3235 EC_KEY_free(clnt_ecdh);
3236 EVP_PKEY_free(srvr_pub_pkey);
3241 int ssl3_send_client_verify(SSL *s)
3244 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
3246 EVP_PKEY_CTX *pctx=NULL;
3252 EVP_MD_CTX_init(&mctx);
3254 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
3256 p= ssl_handshake_start(s);
3257 pkey=s->cert->key->privatekey;
3258 /* Create context from key and test if sha1 is allowed as digest */
3259 pctx = EVP_PKEY_CTX_new(pkey,NULL);
3260 EVP_PKEY_sign_init(pctx);
3261 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
3263 if (!SSL_USE_SIGALGS(s))
3264 s->method->ssl3_enc->cert_verify_mac(s,
3266 &(data[MD5_DIGEST_LENGTH]));
3272 /* For TLS v1.2 send signature algorithm and signature
3273 * using agreed digest and cached handshake records.
3275 if (SSL_USE_SIGALGS(s))
3279 const EVP_MD *md = s->cert->key->digest;
3280 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3282 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3284 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3285 ERR_R_INTERNAL_ERROR);
3290 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3293 if (!EVP_SignInit_ex(&mctx, md, NULL)
3294 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3295 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3297 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3303 if (!ssl3_digest_cached_records(s))
3307 #ifndef OPENSSL_NO_RSA
3308 if (pkey->type == EVP_PKEY_RSA)
3310 s->method->ssl3_enc->cert_verify_mac(s,
3313 if (RSA_sign(NID_md5_sha1, data,
3314 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3315 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3317 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3325 #ifndef OPENSSL_NO_DSA
3326 if (pkey->type == EVP_PKEY_DSA)
3328 if (!DSA_sign(pkey->save_type,
3329 &(data[MD5_DIGEST_LENGTH]),
3330 SHA_DIGEST_LENGTH,&(p[2]),
3331 (unsigned int *)&j,pkey->pkey.dsa))
3333 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3341 #ifndef OPENSSL_NO_ECDSA
3342 if (pkey->type == EVP_PKEY_EC)
3344 if (!ECDSA_sign(pkey->save_type,
3345 &(data[MD5_DIGEST_LENGTH]),
3346 SHA_DIGEST_LENGTH,&(p[2]),
3347 (unsigned int *)&j,pkey->pkey.ec))
3349 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3358 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3360 unsigned char signbuf[64];
3363 s->method->ssl3_enc->cert_verify_mac(s,
3364 NID_id_GostR3411_94,
3366 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3367 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3368 ERR_R_INTERNAL_ERROR);
3371 for (i=63,j=0; i>=0; j++, i--) {
3379 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3382 ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n);
3383 s->state=SSL3_ST_CW_CERT_VRFY_B;
3385 EVP_MD_CTX_cleanup(&mctx);
3386 EVP_PKEY_CTX_free(pctx);
3387 return ssl_do_write(s);
3389 EVP_MD_CTX_cleanup(&mctx);
3390 EVP_PKEY_CTX_free(pctx);
3394 /* Check a certificate can be used for client authentication. Currently
3395 * check cert exists, if we have a suitable digest for TLS 1.2 if
3396 * static DH client certificates can be used and optionally checks
3397 * suitability for Suite B.
3399 static int ssl3_check_client_certificate(SSL *s)
3401 unsigned long alg_k;
3402 if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
3404 /* If no suitable signature algorithm can't use certificate */
3405 if (SSL_USE_SIGALGS(s) && !s->cert->key->digest)
3407 /* If strict mode check suitability of chain before using it.
3408 * This also adjusts suite B digest if necessary.
3410 if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
3411 !tls1_check_chain(s, NULL, NULL, NULL, -2))
3413 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3414 /* See if we can use client certificate for fixed DH */
3415 if (alg_k & (SSL_kDHr|SSL_kDHd))
3417 SESS_CERT *scert = s->session->sess_cert;
3418 int i = scert->peer_cert_type;
3419 EVP_PKEY *clkey = NULL, *spkey = NULL;
3420 clkey = s->cert->key->privatekey;
3421 /* If client key not DH assume it can be used */
3422 if (EVP_PKEY_id(clkey) != EVP_PKEY_DH)
3425 spkey = X509_get_pubkey(scert->peer_pkeys[i].x509);
3428 /* Compare server and client parameters */
3429 i = EVP_PKEY_cmp_parameters(clkey, spkey);
3430 EVP_PKEY_free(spkey);
3434 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
3439 int ssl3_send_client_certificate(SSL *s)
3442 EVP_PKEY *pkey=NULL;
3445 if (s->state == SSL3_ST_CW_CERT_A)
3447 /* Let cert callback update client certificates if required */
3448 if (s->cert->cert_cb)
3450 i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
3453 s->rwstate=SSL_X509_LOOKUP;
3458 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3461 s->rwstate=SSL_NOTHING;
3463 if (ssl3_check_client_certificate(s))
3464 s->state=SSL3_ST_CW_CERT_C;
3466 s->state=SSL3_ST_CW_CERT_B;
3469 /* We need to get a client cert */
3470 if (s->state == SSL3_ST_CW_CERT_B)
3472 /* If we get an error, we need to
3473 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3474 * We then get retied later */
3476 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3479 s->rwstate=SSL_X509_LOOKUP;
3482 s->rwstate=SSL_NOTHING;
3483 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3485 s->state=SSL3_ST_CW_CERT_B;
3486 if ( !SSL_use_certificate(s,x509) ||
3487 !SSL_use_PrivateKey(s,pkey))
3493 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3496 if (x509 != NULL) X509_free(x509);
3497 if (pkey != NULL) EVP_PKEY_free(pkey);
3498 if (i && !ssl3_check_client_certificate(s))
3502 if (s->version == SSL3_VERSION)
3504 s->s3->tmp.cert_req=0;
3505 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3510 s->s3->tmp.cert_req=2;
3514 /* Ok, we have a cert */
3515 s->state=SSL3_ST_CW_CERT_C;
3518 if (s->state == SSL3_ST_CW_CERT_C)
3520 s->state=SSL3_ST_CW_CERT_D;
3521 if (!ssl3_output_cert_chain(s,
3522 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key))
3524 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
3525 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
3529 /* SSL3_ST_CW_CERT_D */
3530 return ssl_do_write(s);
3533 #define has_bits(i,m) (((i)&(m)) == (m))
3535 int ssl3_check_cert_and_algorithm(SSL *s)
3539 EVP_PKEY *pkey=NULL;
3541 #ifndef OPENSSL_NO_RSA
3544 #ifndef OPENSSL_NO_DH
3548 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3549 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3551 /* we don't have a certificate */
3552 if ((alg_a & (SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3555 sc=s->session->sess_cert;
3558 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3562 #ifndef OPENSSL_NO_RSA
3563 rsa=s->session->sess_cert->peer_rsa_tmp;
3565 #ifndef OPENSSL_NO_DH
3566 dh=s->session->sess_cert->peer_dh_tmp;
3569 /* This is the passed certificate */
3571 idx=sc->peer_cert_type;
3572 #ifndef OPENSSL_NO_ECDH
3573 if (idx == SSL_PKEY_ECC)
3575 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3577 { /* check failed */
3578 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3586 else if (alg_a & SSL_aECDSA)
3588 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDSA_SIGNING_CERT);
3591 else if (alg_k & (SSL_kECDHr|SSL_kECDHe))
3593 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_ECDH_CERT);
3597 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3598 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3599 EVP_PKEY_free(pkey);
3602 /* Check that we have a certificate if we require one */
3603 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3605 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3608 #ifndef OPENSSL_NO_DSA
3609 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3611 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3615 #ifndef OPENSSL_NO_RSA
3616 if ((alg_k & SSL_kRSA) &&
3617 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3619 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3623 #ifndef OPENSSL_NO_DH
3624 if ((alg_k & SSL_kDHE) &&
3625 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3627 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3630 else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) &&
3631 !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3633 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3636 #ifndef OPENSSL_NO_DSA
3637 else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) &&
3638 !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3640 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3646 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3648 #ifndef OPENSSL_NO_RSA
3649 if (alg_k & SSL_kRSA)
3652 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3654 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3660 #ifndef OPENSSL_NO_DH
3661 if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd))
3664 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3666 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3673 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3679 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3684 /* Check to see if handshake is full or resumed. Usually this is just a
3685 * case of checking to see if a cache hit has occurred. In the case of
3686 * session tickets we have to check the next message to be sure.
3689 #ifndef OPENSSL_NO_TLSEXT
3690 # ifndef OPENSSL_NO_NEXTPROTONEG
3691 int ssl3_send_next_proto(SSL *s)
3693 unsigned int len, padding_len;
3696 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3698 len = s->next_proto_negotiated_len;
3699 padding_len = 32 - ((len + 2) % 32);
3700 d = (unsigned char *)s->init_buf->data;
3702 memcpy(d + 5, s->next_proto_negotiated, len);
3703 d[5 + len] = padding_len;
3704 memset(d + 6 + len, 0, padding_len);
3705 *(d++)=SSL3_MT_NEXT_PROTO;
3706 l2n3(2 + len + padding_len, d);
3707 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3708 s->init_num = 4 + 2 + len + padding_len;
3712 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3717 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3720 #ifndef OPENSSL_NO_ENGINE
3721 if (s->ctx->client_cert_engine)
3723 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3724 SSL_get_client_CA_list(s),
3725 px509, ppkey, NULL, NULL, NULL);
3730 if (s->ctx->client_cert_cb)
3731 i = s->ctx->client_cert_cb(s,px509,ppkey);