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) 1998-2005 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.
125 #define REUSE_CIPHER_BUG
126 #define NETSCAPE_HANG_BUG
129 #include "ssl_locl.h"
130 #include "kssl_lcl.h"
131 #include <openssl/buffer.h>
132 #include <openssl/rand.h>
133 #include <openssl/objects.h>
134 #include <openssl/evp.h>
135 #include <openssl/hmac.h>
136 #include <openssl/x509.h>
137 #ifndef OPENSSL_NO_DH
138 #include <openssl/dh.h>
140 #include <openssl/bn.h>
141 #ifndef OPENSSL_NO_KRB5
142 #include <openssl/krb5_asn.h>
144 #include <openssl/md5.h>
146 static SSL_METHOD *ssl3_get_server_method(int ver);
147 #ifndef OPENSSL_NO_ECDH
148 static int nid2curve_id(int nid);
151 static SSL_METHOD *ssl3_get_server_method(int ver)
153 if (ver == SSL3_VERSION)
154 return(SSLv3_server_method());
159 IMPLEMENT_ssl3_meth_func(SSLv3_server_method,
161 ssl_undefined_function,
162 ssl3_get_server_method)
164 int ssl3_accept(SSL *s)
167 unsigned long l,Time=(unsigned long)time(NULL);
168 void (*cb)(const SSL *ssl,int type,int val)=NULL;
170 int new_state,state,skip=0;
172 RAND_add(&Time,sizeof(Time),0);
176 if (s->info_callback != NULL)
178 else if (s->ctx->info_callback != NULL)
179 cb=s->ctx->info_callback;
181 /* init things to blank */
183 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
187 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
197 case SSL_ST_RENEGOTIATE:
199 /* s->state=SSL_ST_ACCEPT; */
203 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
204 case SSL_ST_OK|SSL_ST_ACCEPT:
207 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
209 if ((s->version>>8) != 3)
211 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
214 s->type=SSL_ST_ACCEPT;
216 if (s->init_buf == NULL)
218 if ((buf=BUF_MEM_new()) == NULL)
223 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
231 if (!ssl3_setup_buffers(s))
238 s->s3->flags &= ~SSL3_FLAGS_SGC_RESTART_DONE;
240 if (s->state != SSL_ST_RENEGOTIATE)
242 /* Ok, we now need to push on a buffering BIO so that
243 * the output is sent in a way that TCP likes :-)
245 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
247 ssl3_init_finished_mac(s);
248 s->state=SSL3_ST_SR_CLNT_HELLO_A;
249 s->ctx->stats.sess_accept++;
251 else if (!s->s3->send_connection_binding &&
252 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
254 /* Server attempting to renegotiate with
255 * client that doesn't support secure
258 SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
259 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
265 /* s->state == SSL_ST_RENEGOTIATE,
266 * we will just send a HelloRequest */
267 s->ctx->stats.sess_accept_renegotiate++;
268 s->state=SSL3_ST_SW_HELLO_REQ_A;
272 case SSL3_ST_SW_HELLO_REQ_A:
273 case SSL3_ST_SW_HELLO_REQ_B:
276 ret=ssl3_send_hello_request(s);
277 if (ret <= 0) goto end;
278 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
279 s->state=SSL3_ST_SW_FLUSH;
282 ssl3_init_finished_mac(s);
285 case SSL3_ST_SW_HELLO_REQ_C:
289 case SSL3_ST_SR_CLNT_HELLO_A:
290 case SSL3_ST_SR_CLNT_HELLO_B:
291 case SSL3_ST_SR_CLNT_HELLO_C:
294 ret=ssl3_get_client_hello(s);
295 if (ret <= 0) goto end;
297 s->state=SSL3_ST_SW_SRVR_HELLO_A;
301 case SSL3_ST_SW_SRVR_HELLO_A:
302 case SSL3_ST_SW_SRVR_HELLO_B:
303 ret=ssl3_send_server_hello(s);
304 if (ret <= 0) goto end;
305 #ifndef OPENSSL_NO_TLSEXT
308 if (s->tlsext_ticket_expected)
309 s->state=SSL3_ST_SW_SESSION_TICKET_A;
311 s->state=SSL3_ST_SW_CHANGE_A;
315 s->state=SSL3_ST_SW_CHANGE_A;
318 s->state=SSL3_ST_SW_CERT_A;
322 case SSL3_ST_SW_CERT_A:
323 case SSL3_ST_SW_CERT_B:
324 /* Check if it is anon DH or anon ECDH or KRB5 */
325 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)
326 && !(s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
328 ret=ssl3_send_server_certificate(s);
329 if (ret <= 0) goto end;
330 #ifndef OPENSSL_NO_TLSEXT
331 if (s->tlsext_status_expected)
332 s->state=SSL3_ST_SW_CERT_STATUS_A;
334 s->state=SSL3_ST_SW_KEY_EXCH_A;
339 s->state=SSL3_ST_SW_KEY_EXCH_A;
346 s->state=SSL3_ST_SW_KEY_EXCH_A;
351 case SSL3_ST_SW_KEY_EXCH_A:
352 case SSL3_ST_SW_KEY_EXCH_B:
353 l=s->s3->tmp.new_cipher->algorithms;
355 /* clear this, it may get reset by
356 * send_server_key_exchange */
357 if ((s->options & SSL_OP_EPHEMERAL_RSA)
358 #ifndef OPENSSL_NO_KRB5
360 #endif /* OPENSSL_NO_KRB5 */
362 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
363 * even when forbidden by protocol specs
364 * (handshake may fail as clients are not required to
365 * be able to handle this) */
366 s->s3->tmp.use_rsa_tmp=1;
368 s->s3->tmp.use_rsa_tmp=0;
371 /* only send if a DH key exchange, fortezza or
372 * RSA but we have a sign only certificate
374 * For ECC ciphersuites, we send a serverKeyExchange
375 * message only if the cipher suite is either
376 * ECDH-anon or ECDHE. In other cases, the
377 * server certificate contains the server's
378 * public key for key exchange.
380 if (s->s3->tmp.use_rsa_tmp
382 || (l & (SSL_DH|SSL_kFZA))
384 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
385 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
386 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
392 ret=ssl3_send_server_key_exchange(s);
393 if (ret <= 0) goto end;
398 s->state=SSL3_ST_SW_CERT_REQ_A;
402 case SSL3_ST_SW_CERT_REQ_A:
403 case SSL3_ST_SW_CERT_REQ_B:
404 if (/* don't request cert unless asked for it: */
405 !(s->verify_mode & SSL_VERIFY_PEER) ||
406 /* if SSL_VERIFY_CLIENT_ONCE is set,
407 * don't request cert during re-negotiation: */
408 ((s->session->peer != NULL) &&
409 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
410 /* never request cert in anonymous ciphersuites
411 * (see section "Certificate request" in SSL 3 drafts
412 * and in RFC 2246): */
413 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
414 /* ... except when the application insists on verification
415 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
416 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
417 /* never request cert in Kerberos ciphersuites */
418 (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
420 /* no cert request */
422 s->s3->tmp.cert_request=0;
423 s->state=SSL3_ST_SW_SRVR_DONE_A;
427 s->s3->tmp.cert_request=1;
428 ret=ssl3_send_certificate_request(s);
429 if (ret <= 0) goto end;
430 #ifndef NETSCAPE_HANG_BUG
431 s->state=SSL3_ST_SW_SRVR_DONE_A;
433 s->state=SSL3_ST_SW_FLUSH;
434 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
440 case SSL3_ST_SW_SRVR_DONE_A:
441 case SSL3_ST_SW_SRVR_DONE_B:
442 ret=ssl3_send_server_done(s);
443 if (ret <= 0) goto end;
444 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
445 s->state=SSL3_ST_SW_FLUSH;
449 case SSL3_ST_SW_FLUSH:
451 /* This code originally checked to see if
452 * any data was pending using BIO_CTRL_INFO
453 * and then flushed. This caused problems
454 * as documented in PR#1939. The proposed
455 * fix doesn't completely resolve this issue
456 * as buggy implementations of BIO_CTRL_PENDING
457 * still exist. So instead we just flush
461 s->rwstate=SSL_WRITING;
462 if (BIO_flush(s->wbio) <= 0)
467 s->rwstate=SSL_NOTHING;
469 s->state=s->s3->tmp.next_state;
472 case SSL3_ST_SR_CERT_A:
473 case SSL3_ST_SR_CERT_B:
474 /* Check for second client hello (MS SGC) */
475 ret = ssl3_check_client_hello(s);
479 s->state = SSL3_ST_SR_CLNT_HELLO_C;
481 if (s->s3->tmp.cert_request)
483 ret=ssl3_get_client_certificate(s);
484 if (ret <= 0) goto end;
487 s->state=SSL3_ST_SR_KEY_EXCH_A;
491 case SSL3_ST_SR_KEY_EXCH_A:
492 case SSL3_ST_SR_KEY_EXCH_B:
493 ret=ssl3_get_client_key_exchange(s);
498 /* For the ECDH ciphersuites when
499 * the client sends its ECDH pub key in
500 * a certificate, the CertificateVerify
501 * message is not sent.
503 s->state=SSL3_ST_SR_FINISHED_A;
508 s->state=SSL3_ST_SR_CERT_VRFY_A;
511 /* We need to get hashes here so if there is
512 * a client cert, it can be verified
514 s->method->ssl3_enc->cert_verify_mac(s,
515 &(s->s3->finish_dgst1),
516 &(s->s3->tmp.cert_verify_md[0]));
517 s->method->ssl3_enc->cert_verify_mac(s,
518 &(s->s3->finish_dgst2),
519 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
523 case SSL3_ST_SR_CERT_VRFY_A:
524 case SSL3_ST_SR_CERT_VRFY_B:
526 /* we should decide if we expected this one */
527 ret=ssl3_get_cert_verify(s);
528 if (ret <= 0) goto end;
530 s->state=SSL3_ST_SR_FINISHED_A;
534 case SSL3_ST_SR_FINISHED_A:
535 case SSL3_ST_SR_FINISHED_B:
536 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
537 SSL3_ST_SR_FINISHED_B);
538 if (ret <= 0) goto end;
541 #ifndef OPENSSL_NO_TLSEXT
542 else if (s->tlsext_ticket_expected)
543 s->state=SSL3_ST_SW_SESSION_TICKET_A;
546 s->state=SSL3_ST_SW_CHANGE_A;
550 #ifndef OPENSSL_NO_TLSEXT
551 case SSL3_ST_SW_SESSION_TICKET_A:
552 case SSL3_ST_SW_SESSION_TICKET_B:
553 ret=ssl3_send_newsession_ticket(s);
554 if (ret <= 0) goto end;
555 s->state=SSL3_ST_SW_CHANGE_A;
559 case SSL3_ST_SW_CERT_STATUS_A:
560 case SSL3_ST_SW_CERT_STATUS_B:
561 ret=ssl3_send_cert_status(s);
562 if (ret <= 0) goto end;
563 s->state=SSL3_ST_SW_KEY_EXCH_A;
569 case SSL3_ST_SW_CHANGE_A:
570 case SSL3_ST_SW_CHANGE_B:
572 s->session->cipher=s->s3->tmp.new_cipher;
573 if (!s->method->ssl3_enc->setup_key_block(s))
574 { ret= -1; goto end; }
576 ret=ssl3_send_change_cipher_spec(s,
577 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
579 if (ret <= 0) goto end;
580 s->state=SSL3_ST_SW_FINISHED_A;
583 if (!s->method->ssl3_enc->change_cipher_state(s,
584 SSL3_CHANGE_CIPHER_SERVER_WRITE))
592 case SSL3_ST_SW_FINISHED_A:
593 case SSL3_ST_SW_FINISHED_B:
594 ret=ssl3_send_finished(s,
595 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
596 s->method->ssl3_enc->server_finished_label,
597 s->method->ssl3_enc->server_finished_label_len);
598 if (ret <= 0) goto end;
599 s->state=SSL3_ST_SW_FLUSH;
601 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
603 s->s3->tmp.next_state=SSL_ST_OK;
608 /* clean a few things up */
609 ssl3_cleanup_key_block(s);
611 BUF_MEM_free(s->init_buf);
614 /* remove buffering on output */
615 ssl_free_wbio_buffer(s);
619 if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
621 /* actually not necessarily a 'new' session unless
622 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
626 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
628 s->ctx->stats.sess_accept_good++;
630 s->handshake_func=ssl3_accept;
632 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
640 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
646 if (!s->s3->tmp.reuse_message && !skip)
650 if ((ret=BIO_flush(s->wbio)) <= 0)
655 if ((cb != NULL) && (s->state != state))
659 cb(s,SSL_CB_ACCEPT_LOOP,1);
666 /* BIO_flush(s->wbio); */
670 cb(s,SSL_CB_ACCEPT_EXIT,ret);
674 int ssl3_send_hello_request(SSL *s)
678 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
680 p=(unsigned char *)s->init_buf->data;
681 *(p++)=SSL3_MT_HELLO_REQUEST;
686 s->state=SSL3_ST_SW_HELLO_REQ_B;
687 /* number of bytes to write */
692 /* SSL3_ST_SW_HELLO_REQ_B */
693 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
696 int ssl3_check_client_hello(SSL *s)
701 /* this function is called when we really expect a Certificate message,
702 * so permit appropriate message length */
703 n=s->method->ssl_get_message(s,
709 if (!ok) return((int)n);
710 s->s3->tmp.reuse_message = 1;
711 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
713 /* We only allow the client to restart the handshake once per
715 if (s->s3->flags & SSL3_FLAGS_SGC_RESTART_DONE)
717 SSLerr(SSL_F_SSL3_CHECK_CLIENT_HELLO, SSL_R_MULTIPLE_SGC_RESTARTS);
720 /* Throw away what we have done so far in the current handshake,
721 * which will now be aborted. (A full SSL_clear would be too much.) */
722 #ifndef OPENSSL_NO_DH
723 if (s->s3->tmp.dh != NULL)
725 DH_free(s->s3->tmp.dh);
726 s->s3->tmp.dh = NULL;
729 #ifndef OPENSSL_NO_ECDH
730 if (s->s3->tmp.ecdh != NULL)
732 EC_KEY_free(s->s3->tmp.ecdh);
733 s->s3->tmp.ecdh = NULL;
736 s->s3->flags |= SSL3_FLAGS_SGC_RESTART_DONE;
742 int ssl3_get_client_hello(SSL *s)
744 int i,j,ok,al,ret= -1;
745 unsigned int cookie_len;
748 unsigned char *p,*d,*q;
750 #ifndef OPENSSL_NO_COMP
753 STACK_OF(SSL_CIPHER) *ciphers=NULL;
755 /* We do this so that we will respond with our native type.
756 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
757 * This down switching should be handled by a different method.
758 * If we are SSLv3, we will respond with SSLv3, even if prompted with
761 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
763 s->state=SSL3_ST_SR_CLNT_HELLO_B;
766 n=s->method->ssl_get_message(s,
767 SSL3_ST_SR_CLNT_HELLO_B,
768 SSL3_ST_SR_CLNT_HELLO_C,
769 SSL3_MT_CLIENT_HELLO,
770 SSL3_RT_MAX_PLAIN_LENGTH,
773 if (!ok) return((int)n);
775 d=p=(unsigned char *)s->init_msg;
777 /* use version from inside client hello, not from record header
778 * (may differ: see RFC 2246, Appendix E, second paragraph) */
779 s->client_version=(((int)p[0])<<8)|(int)p[1];
782 if ((s->version == DTLS1_VERSION && s->client_version > s->version) ||
783 (s->version != DTLS1_VERSION && s->client_version < s->version))
785 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
786 if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
788 /* similar to ssl3_get_record, send alert using remote version number */
789 s->version = s->client_version;
791 al = SSL_AD_PROTOCOL_VERSION;
795 /* If we require cookies and this ClientHello doesn't
796 * contain one, just return since we do not want to
797 * allocate any memory yet. So check cookie length...
799 if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)
801 unsigned int session_length, cookie_length;
803 session_length = *(p + SSL3_RANDOM_SIZE);
804 cookie_length = *(p + SSL3_RANDOM_SIZE + session_length + 1);
806 if (cookie_length == 0)
810 /* load the client random */
811 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
814 /* get the session-id */
818 /* Versions before 0.9.7 always allow session reuse during renegotiation
819 * (i.e. when s->new_session is true), option
820 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7.
821 * Maybe this optional behaviour should always have been the default,
822 * but we cannot safely change the default behaviour (or new applications
823 * might be written that become totally unsecure when compiled with
824 * an earlier library version)
826 if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
828 if (!ssl_get_new_session(s,1))
833 i=ssl_get_prev_session(s, p, j, d + n);
835 { /* previous session */
842 if (!ssl_get_new_session(s,1))
849 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
855 * The ClientHello may contain a cookie even if the
856 * HelloVerify message has not been sent--make sure that it
857 * does not cause an overflow.
859 if ( cookie_len > sizeof(s->d1->rcvd_cookie))
862 al = SSL_AD_DECODE_ERROR;
863 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
867 /* verify the cookie if appropriate option is set. */
868 if ((SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
871 memcpy(s->d1->rcvd_cookie, p, cookie_len);
873 if ( s->ctx->app_verify_cookie_cb != NULL)
875 if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie,
878 al=SSL_AD_HANDSHAKE_FAILURE;
879 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
880 SSL_R_COOKIE_MISMATCH);
883 /* else cookie verification succeeded */
885 else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie,
886 s->d1->cookie_len) != 0) /* default verification */
888 al=SSL_AD_HANDSHAKE_FAILURE;
889 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
890 SSL_R_COOKIE_MISMATCH);
901 if ((i == 0) && (j != 0))
903 /* we need a cipher if we are not resuming a session */
904 al=SSL_AD_ILLEGAL_PARAMETER;
905 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
910 /* not enough data */
911 al=SSL_AD_DECODE_ERROR;
912 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
915 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
922 /* If it is a hit, check that the cipher is in the list */
923 if ((s->hit) && (i > 0))
926 id=s->session->cipher->id;
929 printf("client sent %d ciphers\n",sk_num(ciphers));
931 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
933 c=sk_SSL_CIPHER_value(ciphers,i);
935 printf("client [%2d of %2d]:%s\n",
936 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
944 /* Disabled because it can be used in a ciphersuite downgrade
945 * attack: CVE-2010-4180.
948 if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
950 /* Special case as client bug workaround: the previously used cipher may
951 * not be in the current list, the client instead might be trying to
952 * continue using a cipher that before wasn't chosen due to server
953 * preferences. We'll have to reject the connection if the cipher is not
954 * enabled, though. */
955 c = sk_SSL_CIPHER_value(ciphers, 0);
956 if (sk_SSL_CIPHER_find(SSL_get_ciphers(s), c) >= 0)
958 s->session->cipher = c;
965 /* we need to have the cipher in the cipher
966 * list if we are asked to reuse it */
967 al=SSL_AD_ILLEGAL_PARAMETER;
968 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
977 /* not enough data */
978 al=SSL_AD_DECODE_ERROR;
979 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
985 if (p[j] == 0) break;
992 al=SSL_AD_DECODE_ERROR;
993 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
997 #ifndef OPENSSL_NO_TLSEXT
999 if (s->version >= SSL3_VERSION)
1001 if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al))
1003 /* 'al' set by ssl_parse_clienthello_tlsext */
1004 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT);
1008 if (ssl_check_clienthello_tlsext_early(s) <= 0) {
1009 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
1013 /* Worst case, we will use the NULL compression, but if we have other
1014 * options, we will now look for them. We have i-1 compression
1015 * algorithms from the client, starting at q. */
1016 s->s3->tmp.new_compression=NULL;
1017 #ifndef OPENSSL_NO_COMP
1018 if (s->ctx->comp_methods != NULL)
1019 { /* See if we have a match */
1020 int m,nn,o,v,done=0;
1022 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
1023 for (m=0; m<nn; m++)
1025 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
1038 s->s3->tmp.new_compression=comp;
1044 /* TLS does not mind if there is extra stuff */
1045 #if 0 /* SSL 3.0 does not mind either, so we should disable this test
1046 * (was enabled in 0.9.6d through 0.9.6j and 0.9.7 through 0.9.7b,
1047 * in earlier SSLeay/OpenSSL releases this test existed but was buggy) */
1048 if (s->version == SSL3_VERSION)
1052 /* wrong number of bytes,
1053 * there could be more to follow */
1054 al=SSL_AD_DECODE_ERROR;
1055 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
1061 /* Given s->session->ciphers and SSL_get_ciphers, we must
1066 #ifdef OPENSSL_NO_COMP
1067 s->session->compress_meth=0;
1069 s->session->compress_meth=(comp == NULL)?0:comp->id;
1071 if (s->session->ciphers != NULL)
1072 sk_SSL_CIPHER_free(s->session->ciphers);
1073 s->session->ciphers=ciphers;
1074 if (ciphers == NULL)
1076 al=SSL_AD_ILLEGAL_PARAMETER;
1077 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
1081 c=ssl3_choose_cipher(s,s->session->ciphers,
1082 SSL_get_ciphers(s));
1086 al=SSL_AD_HANDSHAKE_FAILURE;
1087 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
1090 s->s3->tmp.new_cipher=c;
1094 /* Session-id reuse */
1095 #ifdef REUSE_CIPHER_BUG
1096 STACK_OF(SSL_CIPHER) *sk;
1097 SSL_CIPHER *nc=NULL;
1098 SSL_CIPHER *ec=NULL;
1100 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
1102 sk=s->session->ciphers;
1103 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1105 c=sk_SSL_CIPHER_value(sk,i);
1106 if (c->algorithms & SSL_eNULL)
1108 if (SSL_C_IS_EXPORT(c))
1112 s->s3->tmp.new_cipher=nc;
1113 else if (ec != NULL)
1114 s->s3->tmp.new_cipher=ec;
1116 s->s3->tmp.new_cipher=s->session->cipher;
1120 s->s3->tmp.new_cipher=s->session->cipher;
1123 /* we now have the following setup.
1125 * cipher_list - our prefered list of ciphers
1126 * ciphers - the clients prefered list of ciphers
1127 * compression - basically ignored right now
1128 * ssl version is set - sslv3
1129 * s->session - The ssl session has been setup.
1130 * s->hit - session reuse flag
1131 * s->tmp.new_cipher - the new cipher to use.
1134 #ifndef OPENSSL_NO_TLSEXT
1135 /* Handles TLS extensions that we couldn't check earlier */
1136 if (s->version >= SSL3_VERSION)
1138 if (ssl_check_clienthello_tlsext_late(s) <= 0)
1140 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
1150 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1153 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
1157 int ssl3_send_server_hello(SSL *s)
1160 unsigned char *p,*d;
1162 unsigned long l,Time;
1164 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
1166 buf=(unsigned char *)s->init_buf->data;
1167 p=s->s3->server_random;
1168 Time=(unsigned long)time(NULL); /* Time */
1170 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
1172 /* Do the message type and length last */
1175 *(p++)=s->version>>8;
1176 *(p++)=s->version&0xff;
1179 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
1180 p+=SSL3_RANDOM_SIZE;
1182 /* now in theory we have 3 options to sending back the
1183 * session id. If it is a re-use, we send back the
1184 * old session-id, if it is a new session, we send
1185 * back the new session-id or we send back a 0 length
1186 * session-id if we want it to be single use.
1187 * Currently I will not implement the '0' length session-id
1188 * 12-Jan-98 - I'll now support the '0' length stuff.
1190 * We also have an additional case where stateless session
1191 * resumption is successful: we always send back the old
1192 * session id. In this case s->hit is non zero: this can
1193 * only happen if stateless session resumption is succesful
1194 * if session caching is disabled so existing functionality
1197 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)
1199 s->session->session_id_length=0;
1201 sl=s->session->session_id_length;
1202 if (sl > (int)sizeof(s->session->session_id))
1204 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1208 memcpy(p,s->session->session_id,sl);
1211 /* put the cipher */
1212 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
1215 /* put the compression method */
1216 #ifdef OPENSSL_NO_COMP
1219 if (s->s3->tmp.new_compression == NULL)
1222 *(p++)=s->s3->tmp.new_compression->id;
1224 #ifndef OPENSSL_NO_TLSEXT
1225 if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
1227 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
1234 *(d++)=SSL3_MT_SERVER_HELLO;
1237 s->state=SSL3_ST_SW_SRVR_HELLO_B;
1238 /* number of bytes to write */
1243 /* SSL3_ST_SW_SRVR_HELLO_B */
1244 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1247 int ssl3_send_server_done(SSL *s)
1251 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
1253 p=(unsigned char *)s->init_buf->data;
1256 *(p++)=SSL3_MT_SERVER_DONE;
1261 s->state=SSL3_ST_SW_SRVR_DONE_B;
1262 /* number of bytes to write */
1267 /* SSL3_ST_SW_SRVR_DONE_B */
1268 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1271 int ssl3_send_server_key_exchange(SSL *s)
1273 #ifndef OPENSSL_NO_RSA
1277 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1280 #ifndef OPENSSL_NO_DH
1283 #ifndef OPENSSL_NO_ECDH
1284 EC_KEY *ecdh=NULL, *ecdhp;
1285 unsigned char *encodedPoint = NULL;
1288 BN_CTX *bn_ctx = NULL;
1291 unsigned char *p,*d;
1301 EVP_MD_CTX_init(&md_ctx);
1302 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1304 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
1309 r[0]=r[1]=r[2]=r[3]=NULL;
1311 #ifndef OPENSSL_NO_RSA
1312 if (type & SSL_kRSA)
1315 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1317 rsa=s->cert->rsa_tmp_cb(s,
1318 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1319 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1322 al=SSL_AD_HANDSHAKE_FAILURE;
1323 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1331 al=SSL_AD_HANDSHAKE_FAILURE;
1332 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1337 s->s3->tmp.use_rsa_tmp=1;
1341 #ifndef OPENSSL_NO_DH
1342 if (type & SSL_kEDH)
1345 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1346 dhp=s->cert->dh_tmp_cb(s,
1347 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1348 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1351 al=SSL_AD_HANDSHAKE_FAILURE;
1352 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1356 if (s->s3->tmp.dh != NULL)
1358 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1362 if ((dh=DHparams_dup(dhp)) == NULL)
1364 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1369 if ((dhp->pub_key == NULL ||
1370 dhp->priv_key == NULL ||
1371 (s->options & SSL_OP_SINGLE_DH_USE)))
1373 if(!DH_generate_key(dh))
1375 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1382 dh->pub_key=BN_dup(dhp->pub_key);
1383 dh->priv_key=BN_dup(dhp->priv_key);
1384 if ((dh->pub_key == NULL) ||
1385 (dh->priv_key == NULL))
1387 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1397 #ifndef OPENSSL_NO_ECDH
1398 if (type & SSL_kECDHE)
1400 const EC_GROUP *group;
1402 ecdhp=cert->ecdh_tmp;
1403 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1405 ecdhp=s->cert->ecdh_tmp_cb(s,
1406 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1407 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1411 al=SSL_AD_HANDSHAKE_FAILURE;
1412 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1416 if (s->s3->tmp.ecdh != NULL)
1418 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1422 /* Duplicate the ECDH structure. */
1425 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1428 if ((ecdh = EC_KEY_dup(ecdhp)) == NULL)
1430 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1434 s->s3->tmp.ecdh=ecdh;
1435 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
1436 (EC_KEY_get0_private_key(ecdh) == NULL) ||
1437 (s->options & SSL_OP_SINGLE_ECDH_USE))
1439 if(!EC_KEY_generate_key(ecdh))
1441 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1446 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
1447 (EC_KEY_get0_public_key(ecdh) == NULL) ||
1448 (EC_KEY_get0_private_key(ecdh) == NULL))
1450 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1454 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1455 (EC_GROUP_get_degree(group) > 163))
1457 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1461 /* XXX: For now, we only support ephemeral ECDH
1462 * keys over named (not generic) curves. For
1463 * supported named curves, curve_id is non-zero.
1466 nid2curve_id(EC_GROUP_get_curve_name(group)))
1469 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1473 /* Encode the public key.
1474 * First check the size of encoding and
1475 * allocate memory accordingly.
1477 encodedlen = EC_POINT_point2oct(group,
1478 EC_KEY_get0_public_key(ecdh),
1479 POINT_CONVERSION_UNCOMPRESSED,
1482 encodedPoint = (unsigned char *)
1483 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1484 bn_ctx = BN_CTX_new();
1485 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1487 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1492 encodedlen = EC_POINT_point2oct(group,
1493 EC_KEY_get0_public_key(ecdh),
1494 POINT_CONVERSION_UNCOMPRESSED,
1495 encodedPoint, encodedlen, bn_ctx);
1497 if (encodedlen == 0)
1499 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1503 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1505 /* XXX: For now, we only support named (not
1506 * generic) curves in ECDH ephemeral key exchanges.
1507 * In this situation, we need four additional bytes
1508 * to encode the entire ServerECDHParams
1513 /* We'll generate the serverKeyExchange message
1514 * explicitly so we can set these to NULLs
1522 #endif /* !OPENSSL_NO_ECDH */
1524 al=SSL_AD_HANDSHAKE_FAILURE;
1525 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1528 for (i=0; r[i] != NULL; i++)
1530 nr[i]=BN_num_bytes(r[i]);
1534 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL))
1536 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1539 al=SSL_AD_DECODE_ERROR;
1542 kn=EVP_PKEY_size(pkey);
1550 if (!BUF_MEM_grow_clean(buf,n+4+kn))
1552 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1555 d=(unsigned char *)s->init_buf->data;
1558 for (i=0; r[i] != NULL; i++)
1565 #ifndef OPENSSL_NO_ECDH
1566 if (type & SSL_kECDHE)
1568 /* XXX: For now, we only support named (not generic) curves.
1569 * In this situation, the serverKeyExchange message has:
1570 * [1 byte CurveType], [2 byte CurveName]
1571 * [1 byte length of encoded point], followed by
1572 * the actual encoded point itself
1574 *p = NAMED_CURVE_TYPE;
1582 memcpy((unsigned char*)p,
1583 (unsigned char *)encodedPoint,
1585 OPENSSL_free(encodedPoint);
1586 encodedPoint = NULL;
1594 /* n is the length of the params, they start at &(d[4])
1595 * and p points to the space at the end. */
1596 #ifndef OPENSSL_NO_RSA
1597 if (pkey->type == EVP_PKEY_RSA)
1601 for (num=2; num > 0; num--)
1603 EVP_MD_CTX_set_flags(&md_ctx,
1604 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1605 EVP_DigestInit_ex(&md_ctx,(num == 2)
1606 ?s->ctx->md5:s->ctx->sha1, NULL);
1607 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1608 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1609 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1610 EVP_DigestFinal_ex(&md_ctx,q,
1611 (unsigned int *)&i);
1615 if (RSA_sign(NID_md5_sha1, md_buf, j,
1616 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1618 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1626 #if !defined(OPENSSL_NO_DSA)
1627 if (pkey->type == EVP_PKEY_DSA)
1630 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1631 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1632 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1633 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1634 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1635 (unsigned int *)&i,pkey))
1637 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1645 #if !defined(OPENSSL_NO_ECDSA)
1646 if (pkey->type == EVP_PKEY_EC)
1648 /* let's do ECDSA */
1649 EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1650 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1651 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1652 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1653 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1654 (unsigned int *)&i,pkey))
1656 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
1665 /* Is this error check actually needed? */
1666 al=SSL_AD_HANDSHAKE_FAILURE;
1667 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1672 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1675 /* we should now have things packed up, so lets send
1681 s->state = SSL3_ST_SW_KEY_EXCH_B;
1682 EVP_MD_CTX_cleanup(&md_ctx);
1683 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1685 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1687 #ifndef OPENSSL_NO_ECDH
1688 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1689 BN_CTX_free(bn_ctx);
1691 EVP_MD_CTX_cleanup(&md_ctx);
1695 int ssl3_send_certificate_request(SSL *s)
1697 unsigned char *p,*d;
1699 STACK_OF(X509_NAME) *sk=NULL;
1703 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1707 d=p=(unsigned char *)&(buf->data[4]);
1709 /* get the list of acceptable cert types */
1711 n=ssl3_get_req_cert_type(s,p);
1720 sk=SSL_get_client_CA_list(s);
1724 for (i=0; i<sk_X509_NAME_num(sk); i++)
1726 name=sk_X509_NAME_value(sk,i);
1727 j=i2d_X509_NAME(name,NULL);
1728 if (!BUF_MEM_grow_clean(buf,4+n+j+2))
1730 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1733 p=(unsigned char *)&(buf->data[4+n]);
1734 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1737 i2d_X509_NAME(name,&p);
1744 i2d_X509_NAME(name,&p);
1745 j-=2; s2n(j,d); j+=2;
1751 /* else no CA names */
1752 p=(unsigned char *)&(buf->data[4+off]);
1755 d=(unsigned char *)buf->data;
1756 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1759 /* we should now have things packed up, so lets send
1764 #ifdef NETSCAPE_HANG_BUG
1765 p=(unsigned char *)s->init_buf->data + s->init_num;
1768 *(p++)=SSL3_MT_SERVER_DONE;
1775 s->state = SSL3_ST_SW_CERT_REQ_B;
1778 /* SSL3_ST_SW_CERT_REQ_B */
1779 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1784 int ssl3_get_client_key_exchange(SSL *s)
1790 #ifndef OPENSSL_NO_RSA
1792 EVP_PKEY *pkey=NULL;
1794 #ifndef OPENSSL_NO_DH
1798 #ifndef OPENSSL_NO_KRB5
1800 #endif /* OPENSSL_NO_KRB5 */
1802 #ifndef OPENSSL_NO_ECDH
1803 EC_KEY *srvr_ecdh = NULL;
1804 EVP_PKEY *clnt_pub_pkey = NULL;
1805 EC_POINT *clnt_ecpoint = NULL;
1806 BN_CTX *bn_ctx = NULL;
1809 n=s->method->ssl_get_message(s,
1810 SSL3_ST_SR_KEY_EXCH_A,
1811 SSL3_ST_SR_KEY_EXCH_B,
1812 SSL3_MT_CLIENT_KEY_EXCHANGE,
1816 if (!ok) return((int)n);
1817 p=(unsigned char *)s->init_msg;
1819 l=s->s3->tmp.new_cipher->algorithms;
1821 #ifndef OPENSSL_NO_RSA
1824 /* FIX THIS UP EAY EAY EAY EAY */
1825 if (s->s3->tmp.use_rsa_tmp)
1827 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1828 rsa=s->cert->rsa_tmp;
1829 /* Don't do a callback because rsa_tmp should
1830 * be sent already */
1833 al=SSL_AD_HANDSHAKE_FAILURE;
1834 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1841 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1842 if ( (pkey == NULL) ||
1843 (pkey->type != EVP_PKEY_RSA) ||
1844 (pkey->pkey.rsa == NULL))
1846 al=SSL_AD_HANDSHAKE_FAILURE;
1847 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1853 /* TLS and [incidentally] DTLS, including pre-0.9.8f */
1854 if (s->version > SSL3_VERSION &&
1855 s->client_version != DTLS1_BAD_VER)
1860 if (!(s->options & SSL_OP_TLS_D5_BUG))
1862 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1872 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1876 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1878 al=SSL_AD_DECODE_ERROR;
1879 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */
1882 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1884 /* The premaster secret must contain the same version number as the
1885 * ClientHello to detect version rollback attacks (strangely, the
1886 * protocol does not offer such protection for DH ciphersuites).
1887 * However, buggy clients exist that send the negotiated protocol
1888 * version instead if the server does not support the requested
1890 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1891 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1892 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1894 al=SSL_AD_DECODE_ERROR;
1895 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */
1897 /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack
1898 * (http://eprint.iacr.org/2003/052/) exploits the version
1899 * number check as a "bad version oracle" -- an alert would
1900 * reveal that the plaintext corresponding to some ciphertext
1901 * made up by the adversary is properly formatted except
1902 * that the version number is wrong. To avoid such attacks,
1903 * we should treat this just like any other decryption error. */
1909 /* Some decryption failure -- use random value instead as countermeasure
1910 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1911 * (see RFC 2246, section 7.4.7.1). */
1913 i = SSL_MAX_MASTER_KEY_LENGTH;
1914 p[0] = s->client_version >> 8;
1915 p[1] = s->client_version & 0xff;
1916 if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */
1920 s->session->master_key_length=
1921 s->method->ssl3_enc->generate_master_secret(s,
1922 s->session->master_key,
1924 OPENSSL_cleanse(p,i);
1928 #ifndef OPENSSL_NO_DH
1929 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1934 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1936 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1946 if (n == 0L) /* the parameters are in the cert */
1948 al=SSL_AD_HANDSHAKE_FAILURE;
1949 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1954 if (s->s3->tmp.dh == NULL)
1956 al=SSL_AD_HANDSHAKE_FAILURE;
1957 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1961 dh_srvr=s->s3->tmp.dh;
1964 pub=BN_bin2bn(p,i,NULL);
1967 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1971 i=DH_compute_key(p,pub,dh_srvr);
1975 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1980 DH_free(s->s3->tmp.dh);
1985 s->session->master_key_length=
1986 s->method->ssl3_enc->generate_master_secret(s,
1987 s->session->master_key,p,i);
1988 OPENSSL_cleanse(p,i);
1992 #ifndef OPENSSL_NO_KRB5
1995 krb5_error_code krb5rc;
1996 krb5_data enc_ticket;
1997 krb5_data authenticator;
1999 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2000 EVP_CIPHER_CTX ciph_ctx;
2001 EVP_CIPHER *enc = NULL;
2002 unsigned char iv[EVP_MAX_IV_LENGTH];
2003 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
2004 + EVP_MAX_BLOCK_LENGTH];
2006 krb5_timestamp authtime = 0;
2007 krb5_ticket_times ttimes;
2009 EVP_CIPHER_CTX_init(&ciph_ctx);
2011 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
2014 enc_ticket.length = i;
2016 if (n < (int)enc_ticket.length + 6)
2018 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2019 SSL_R_DATA_LENGTH_TOO_LONG);
2023 enc_ticket.data = (char *)p;
2024 p+=enc_ticket.length;
2027 authenticator.length = i;
2029 if (n < (int)(enc_ticket.length + authenticator.length) + 6)
2031 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2032 SSL_R_DATA_LENGTH_TOO_LONG);
2036 authenticator.data = (char *)p;
2037 p+=authenticator.length;
2041 enc_pms.data = (char *)p;
2044 /* Note that the length is checked again below,
2047 if(enc_pms.length > sizeof pms)
2049 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2050 SSL_R_DATA_LENGTH_TOO_LONG);
2054 if (n != (long)(enc_ticket.length + authenticator.length +
2055 enc_pms.length + 6))
2057 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2058 SSL_R_DATA_LENGTH_TOO_LONG);
2062 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
2066 printf("kssl_sget_tkt rtn %d [%d]\n",
2067 krb5rc, kssl_err.reason);
2069 printf("kssl_err text= %s\n", kssl_err.text);
2070 #endif /* KSSL_DEBUG */
2071 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2076 /* Note: no authenticator is not considered an error,
2077 ** but will return authtime == 0.
2079 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
2080 &authtime, &kssl_err)) != 0)
2083 printf("kssl_check_authent rtn %d [%d]\n",
2084 krb5rc, kssl_err.reason);
2086 printf("kssl_err text= %s\n", kssl_err.text);
2087 #endif /* KSSL_DEBUG */
2088 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2093 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
2095 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc);
2100 kssl_ctx_show(kssl_ctx);
2101 #endif /* KSSL_DEBUG */
2103 enc = kssl_map_enc(kssl_ctx->enctype);
2107 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2109 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
2111 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2112 SSL_R_DECRYPTION_FAILED);
2115 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
2116 (unsigned char *)enc_pms.data, enc_pms.length))
2118 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2119 SSL_R_DECRYPTION_FAILED);
2122 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2124 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2125 SSL_R_DATA_LENGTH_TOO_LONG);
2128 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
2130 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2131 SSL_R_DECRYPTION_FAILED);
2135 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2137 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2138 SSL_R_DATA_LENGTH_TOO_LONG);
2141 if (!((pms[0] == (s->client_version>>8)) && (pms[1] == (s->client_version & 0xff))))
2143 /* The premaster secret must contain the same version number as the
2144 * ClientHello to detect version rollback attacks (strangely, the
2145 * protocol does not offer such protection for DH ciphersuites).
2146 * However, buggy clients exist that send random bytes instead of
2147 * the protocol version.
2148 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients.
2149 * (Perhaps we should have a separate BUG value for the Kerberos cipher)
2151 if (!(s->options & SSL_OP_TLS_ROLLBACK_BUG))
2153 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2154 SSL_AD_DECODE_ERROR);
2159 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2161 s->session->master_key_length=
2162 s->method->ssl3_enc->generate_master_secret(s,
2163 s->session->master_key, pms, outl);
2165 if (kssl_ctx->client_princ)
2167 size_t len = strlen(kssl_ctx->client_princ);
2168 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
2170 s->session->krb5_client_princ_len = len;
2171 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
2176 /* Was doing kssl_ctx_free() here,
2177 ** but it caused problems for apache.
2178 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
2179 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
2183 #endif /* OPENSSL_NO_KRB5 */
2185 #ifndef OPENSSL_NO_ECDH
2186 if ((l & SSL_kECDH) || (l & SSL_kECDHE))
2191 const EC_GROUP *group;
2192 const BIGNUM *priv_key;
2194 /* initialize structures for server's ECDH key pair */
2195 if ((srvr_ecdh = EC_KEY_new()) == NULL)
2197 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2198 ERR_R_MALLOC_FAILURE);
2202 /* Let's get server private key and group information */
2205 /* use the certificate */
2206 tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec;
2210 /* use the ephermeral values we saved when
2211 * generating the ServerKeyExchange msg.
2213 tkey = s->s3->tmp.ecdh;
2216 group = EC_KEY_get0_group(tkey);
2217 priv_key = EC_KEY_get0_private_key(tkey);
2219 if (!EC_KEY_set_group(srvr_ecdh, group) ||
2220 !EC_KEY_set_private_key(srvr_ecdh, priv_key))
2222 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2227 /* Let's get client's public key */
2228 if ((clnt_ecpoint = EC_POINT_new(group)) == NULL)
2230 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2231 ERR_R_MALLOC_FAILURE);
2237 /* Client Publickey was in Client Certificate */
2241 al=SSL_AD_HANDSHAKE_FAILURE;
2242 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
2245 if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer))
2247 (clnt_pub_pkey->type != EVP_PKEY_EC))
2249 /* XXX: For now, we do not support client
2250 * authentication using ECDH certificates
2251 * so this branch (n == 0L) of the code is
2252 * never executed. When that support is
2253 * added, we ought to ensure the key
2254 * received in the certificate is
2255 * authorized for key agreement.
2256 * ECDH_compute_key implicitly checks that
2257 * the two ECDH shares are for the same
2260 al=SSL_AD_HANDSHAKE_FAILURE;
2261 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2262 SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
2266 if (EC_POINT_copy(clnt_ecpoint,
2267 EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0)
2269 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2273 ret = 2; /* Skip certificate verify processing */
2277 /* Get client's public key from encoded point
2278 * in the ClientKeyExchange message.
2280 if ((bn_ctx = BN_CTX_new()) == NULL)
2282 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2283 ERR_R_MALLOC_FAILURE);
2287 /* Get encoded point length */
2292 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2296 if (EC_POINT_oct2point(group,
2297 clnt_ecpoint, p, i, bn_ctx) == 0)
2299 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2303 /* p is pointing to somewhere in the buffer
2304 * currently, so set it to the start
2306 p=(unsigned char *)s->init_buf->data;
2309 /* Compute the shared pre-master secret */
2310 field_size = EC_GROUP_get_degree(group);
2311 if (field_size <= 0)
2313 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2317 i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL);
2320 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2325 EVP_PKEY_free(clnt_pub_pkey);
2326 EC_POINT_free(clnt_ecpoint);
2327 if (srvr_ecdh != NULL)
2328 EC_KEY_free(srvr_ecdh);
2329 BN_CTX_free(bn_ctx);
2331 /* Compute the master secret */
2332 s->session->master_key_length = s->method->ssl3_enc-> \
2333 generate_master_secret(s, s->session->master_key, p, i);
2335 OPENSSL_cleanse(p, i);
2341 al=SSL_AD_HANDSHAKE_FAILURE;
2342 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2343 SSL_R_UNKNOWN_CIPHER_TYPE);
2349 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2350 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH)
2353 #ifndef OPENSSL_NO_ECDH
2354 EVP_PKEY_free(clnt_pub_pkey);
2355 EC_POINT_free(clnt_ecpoint);
2356 if (srvr_ecdh != NULL)
2357 EC_KEY_free(srvr_ecdh);
2358 BN_CTX_free(bn_ctx);
2363 int ssl3_get_cert_verify(SSL *s)
2365 EVP_PKEY *pkey=NULL;
2372 n=s->method->ssl_get_message(s,
2373 SSL3_ST_SR_CERT_VRFY_A,
2374 SSL3_ST_SR_CERT_VRFY_B,
2379 if (!ok) return((int)n);
2381 if (s->session->peer != NULL)
2383 peer=s->session->peer;
2384 pkey=X509_get_pubkey(peer);
2385 type=X509_certificate_type(peer,pkey);
2393 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
2395 s->s3->tmp.reuse_message=1;
2396 if ((peer != NULL) && (type | EVP_PKT_SIGN))
2398 al=SSL_AD_UNEXPECTED_MESSAGE;
2399 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
2408 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
2409 al=SSL_AD_UNEXPECTED_MESSAGE;
2413 if (!(type & EVP_PKT_SIGN))
2415 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
2416 al=SSL_AD_ILLEGAL_PARAMETER;
2420 if (s->s3->change_cipher_spec)
2422 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
2423 al=SSL_AD_UNEXPECTED_MESSAGE;
2427 /* we now have a signature that we need to verify */
2428 p=(unsigned char *)s->init_msg;
2433 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
2434 al=SSL_AD_DECODE_ERROR;
2438 j=EVP_PKEY_size(pkey);
2439 if ((i > j) || (n > j) || (n <= 0))
2441 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
2442 al=SSL_AD_DECODE_ERROR;
2446 #ifndef OPENSSL_NO_RSA
2447 if (pkey->type == EVP_PKEY_RSA)
2449 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
2450 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
2454 al=SSL_AD_DECRYPT_ERROR;
2455 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
2460 al=SSL_AD_DECRYPT_ERROR;
2461 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
2467 #ifndef OPENSSL_NO_DSA
2468 if (pkey->type == EVP_PKEY_DSA)
2470 j=DSA_verify(pkey->save_type,
2471 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2472 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
2476 al=SSL_AD_DECRYPT_ERROR;
2477 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
2483 #ifndef OPENSSL_NO_ECDSA
2484 if (pkey->type == EVP_PKEY_EC)
2486 j=ECDSA_verify(pkey->save_type,
2487 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2488 SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec);
2492 al=SSL_AD_DECRYPT_ERROR;
2493 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
2494 SSL_R_BAD_ECDSA_SIGNATURE);
2501 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
2502 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
2511 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2514 EVP_PKEY_free(pkey);
2518 int ssl3_get_client_certificate(SSL *s)
2520 int i,ok,al,ret= -1;
2522 unsigned long l,nc,llen,n;
2523 const unsigned char *p,*q;
2525 STACK_OF(X509) *sk=NULL;
2527 n=s->method->ssl_get_message(s,
2534 if (!ok) return((int)n);
2536 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
2538 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
2539 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2541 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2542 al=SSL_AD_HANDSHAKE_FAILURE;
2545 /* If tls asked for a client cert, the client must return a 0 list */
2546 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
2548 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
2549 al=SSL_AD_UNEXPECTED_MESSAGE;
2552 s->s3->tmp.reuse_message=1;
2556 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
2558 al=SSL_AD_UNEXPECTED_MESSAGE;
2559 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
2562 p=d=(unsigned char *)s->init_msg;
2564 if ((sk=sk_X509_new_null()) == NULL)
2566 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2573 al=SSL_AD_DECODE_ERROR;
2574 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
2577 for (nc=0; nc<llen; )
2580 if ((l+nc+3) > llen)
2582 al=SSL_AD_DECODE_ERROR;
2583 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2588 x=d2i_X509(NULL,&p,l);
2591 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
2596 al=SSL_AD_DECODE_ERROR;
2597 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2600 if (!sk_X509_push(sk,x))
2602 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2609 if (sk_X509_num(sk) <= 0)
2611 /* TLS does not mind 0 certs returned */
2612 if (s->version == SSL3_VERSION)
2614 al=SSL_AD_HANDSHAKE_FAILURE;
2615 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
2618 /* Fail for TLS only if we required a certificate */
2619 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
2620 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2622 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2623 al=SSL_AD_HANDSHAKE_FAILURE;
2629 i=ssl_verify_cert_chain(s,sk);
2632 al=ssl_verify_alarm_type(s->verify_result);
2633 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
2638 if (s->session->peer != NULL) /* This should not be needed */
2639 X509_free(s->session->peer);
2640 s->session->peer=sk_X509_shift(sk);
2641 s->session->verify_result = s->verify_result;
2643 /* With the current implementation, sess_cert will always be NULL
2644 * when we arrive here. */
2645 if (s->session->sess_cert == NULL)
2647 s->session->sess_cert = ssl_sess_cert_new();
2648 if (s->session->sess_cert == NULL)
2650 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
2654 if (s->session->sess_cert->cert_chain != NULL)
2655 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
2656 s->session->sess_cert->cert_chain=sk;
2657 /* Inconsistency alert: cert_chain does *not* include the
2658 * peer's own certificate, while we do include it in s3_clnt.c */
2666 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2669 if (x != NULL) X509_free(x);
2670 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
2674 int ssl3_send_server_certificate(SSL *s)
2679 if (s->state == SSL3_ST_SW_CERT_A)
2681 x=ssl_get_server_send_cert(s);
2683 /* VRS: allow null cert if auth == KRB5 */
2684 (s->s3->tmp.new_cipher->algorithms
2685 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
2686 != (SSL_aKRB5|SSL_kKRB5))
2688 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
2692 l=ssl3_output_cert_chain(s,x);
2693 s->state=SSL3_ST_SW_CERT_B;
2698 /* SSL3_ST_SW_CERT_B */
2699 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2703 #ifndef OPENSSL_NO_ECDH
2704 /* This is the complement of curve_id2nid in s3_clnt.c. */
2705 static int nid2curve_id(int nid)
2707 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001)
2708 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */
2710 case NID_sect163k1: /* sect163k1 (1) */
2712 case NID_sect163r1: /* sect163r1 (2) */
2714 case NID_sect163r2: /* sect163r2 (3) */
2716 case NID_sect193r1: /* sect193r1 (4) */
2718 case NID_sect193r2: /* sect193r2 (5) */
2720 case NID_sect233k1: /* sect233k1 (6) */
2722 case NID_sect233r1: /* sect233r1 (7) */
2724 case NID_sect239k1: /* sect239k1 (8) */
2726 case NID_sect283k1: /* sect283k1 (9) */
2728 case NID_sect283r1: /* sect283r1 (10) */
2730 case NID_sect409k1: /* sect409k1 (11) */
2732 case NID_sect409r1: /* sect409r1 (12) */
2734 case NID_sect571k1: /* sect571k1 (13) */
2736 case NID_sect571r1: /* sect571r1 (14) */
2738 case NID_secp160k1: /* secp160k1 (15) */
2740 case NID_secp160r1: /* secp160r1 (16) */
2742 case NID_secp160r2: /* secp160r2 (17) */
2744 case NID_secp192k1: /* secp192k1 (18) */
2746 case NID_X9_62_prime192v1: /* secp192r1 (19) */
2748 case NID_secp224k1: /* secp224k1 (20) */
2750 case NID_secp224r1: /* secp224r1 (21) */
2752 case NID_secp256k1: /* secp256k1 (22) */
2754 case NID_X9_62_prime256v1: /* secp256r1 (23) */
2756 case NID_secp384r1: /* secp384r1 (24) */
2758 case NID_secp521r1: /* secp521r1 (25) */
2765 #ifndef OPENSSL_NO_TLSEXT
2766 int ssl3_send_newsession_ticket(SSL *s)
2768 if (s->state == SSL3_ST_SW_SESSION_TICKET_A)
2770 unsigned char *p, *senc, *macstart;
2775 SSL_CTX *tctx = s->initial_ctx;
2776 unsigned char iv[EVP_MAX_IV_LENGTH];
2777 unsigned char key_name[16];
2779 /* get session encoding length */
2780 slen = i2d_SSL_SESSION(s->session, NULL);
2781 /* Some length values are 16 bits, so forget it if session is
2786 /* Grow buffer if need be: the length calculation is as
2787 * follows 1 (size of message name) + 3 (message length
2788 * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) +
2789 * 16 (key name) + max_iv_len (iv length) +
2790 * session_length + max_enc_block_size (max encrypted session
2791 * length) + max_md_size (HMAC).
2793 if (!BUF_MEM_grow(s->init_buf,
2794 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH +
2795 EVP_MAX_MD_SIZE + slen))
2797 senc = OPENSSL_malloc(slen);
2801 i2d_SSL_SESSION(s->session, &p);
2803 p=(unsigned char *)s->init_buf->data;
2805 *(p++)=SSL3_MT_NEWSESSION_TICKET;
2806 /* Skip message length for now */
2808 EVP_CIPHER_CTX_init(&ctx);
2809 HMAC_CTX_init(&hctx);
2810 /* Initialize HMAC and cipher contexts. If callback present
2811 * it does all the work otherwise use generated values
2814 if (tctx->tlsext_ticket_key_cb)
2816 if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
2825 RAND_pseudo_bytes(iv, 16);
2826 EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
2827 tctx->tlsext_tick_aes_key, iv);
2828 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
2829 tlsext_tick_md(), NULL);
2830 memcpy(key_name, tctx->tlsext_tick_key_name, 16);
2832 l2n(s->session->tlsext_tick_lifetime_hint, p);
2833 /* Skip ticket length for now */
2835 /* Output key name */
2837 memcpy(p, key_name, 16);
2840 memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
2841 p += EVP_CIPHER_CTX_iv_length(&ctx);
2842 /* Encrypt session data */
2843 EVP_EncryptUpdate(&ctx, p, &len, senc, slen);
2845 EVP_EncryptFinal(&ctx, p, &len);
2847 EVP_CIPHER_CTX_cleanup(&ctx);
2849 HMAC_Update(&hctx, macstart, p - macstart);
2850 HMAC_Final(&hctx, p, &hlen);
2851 HMAC_CTX_cleanup(&hctx);
2854 /* Now write out lengths: p points to end of data written */
2856 len = p - (unsigned char *)s->init_buf->data;
2857 p=(unsigned char *)s->init_buf->data + 1;
2858 l2n3(len - 4, p); /* Message length */
2860 s2n(len - 10, p); /* Ticket length */
2862 /* number of bytes to write */
2864 s->state=SSL3_ST_SW_SESSION_TICKET_B;
2869 /* SSL3_ST_SW_SESSION_TICKET_B */
2870 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2873 int ssl3_send_cert_status(SSL *s)
2875 if (s->state == SSL3_ST_SW_CERT_STATUS_A)
2878 /* Grow buffer if need be: the length calculation is as
2879 * follows 1 (message type) + 3 (message length) +
2880 * 1 (ocsp response type) + 3 (ocsp response length)
2883 if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen))
2886 p=(unsigned char *)s->init_buf->data;
2889 *(p++)=SSL3_MT_CERTIFICATE_STATUS;
2890 /* message length */
2891 l2n3(s->tlsext_ocsp_resplen + 4, p);
2893 *(p++)= s->tlsext_status_type;
2894 /* length of OCSP response */
2895 l2n3(s->tlsext_ocsp_resplen, p);
2896 /* actual response */
2897 memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen);
2898 /* number of bytes to write */
2899 s->init_num = 8 + s->tlsext_ocsp_resplen;
2900 s->state=SSL3_ST_SW_CERT_STATUS_B;
2904 /* SSL3_ST_SW_CERT_STATUS_B */
2905 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));