1 /* ssl/s3_srvr.c -*- mode:C; c-file-style: "eay" -*- */
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) 1998-2006 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
151 #define REUSE_CIPHER_BUG
152 #define NETSCAPE_HANG_BUG
155 #include "ssl_locl.h"
156 #include "kssl_lcl.h"
157 #include <openssl/buffer.h>
158 #include <openssl/rand.h>
159 #include <openssl/objects.h>
160 #include <openssl/evp.h>
161 #include <openssl/x509.h>
162 #ifndef OPENSSL_NO_DH
163 #include <openssl/dh.h>
165 #include <openssl/bn.h>
166 #ifndef OPENSSL_NO_KRB5
167 #include <openssl/krb5_asn.h>
169 #include <openssl/md5.h>
171 static const SSL_METHOD *ssl3_get_server_method(int ver);
173 static const SSL_METHOD *ssl3_get_server_method(int ver)
175 if (ver == SSL3_VERSION)
176 return(SSLv3_server_method());
181 IMPLEMENT_ssl3_meth_func(SSLv3_server_method,
183 ssl_undefined_function,
184 ssl3_get_server_method)
186 int ssl3_accept(SSL *s)
189 unsigned long l,Time=(unsigned long)time(NULL);
190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
193 int new_state,state,skip=0;
195 RAND_add(&Time,sizeof(Time),0);
199 if (s->info_callback != NULL)
201 else if (s->ctx->info_callback != NULL)
202 cb=s->ctx->info_callback;
204 /* init things to blank */
206 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
210 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
220 case SSL_ST_RENEGOTIATE:
222 /* s->state=SSL_ST_ACCEPT; */
226 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
227 case SSL_ST_OK|SSL_ST_ACCEPT:
230 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
232 if ((s->version>>8) != 3)
234 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
237 s->type=SSL_ST_ACCEPT;
239 if (s->init_buf == NULL)
241 if ((buf=BUF_MEM_new()) == NULL)
246 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
254 if (!ssl3_setup_buffers(s))
262 if (s->state != SSL_ST_RENEGOTIATE)
264 /* Ok, we now need to push on a buffering BIO so that
265 * the output is sent in a way that TCP likes :-)
267 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
269 ssl3_init_finished_mac(s);
270 s->state=SSL3_ST_SR_CLNT_HELLO_A;
271 s->ctx->stats.sess_accept++;
275 /* s->state == SSL_ST_RENEGOTIATE,
276 * we will just send a HelloRequest */
277 s->ctx->stats.sess_accept_renegotiate++;
278 s->state=SSL3_ST_SW_HELLO_REQ_A;
282 case SSL3_ST_SW_HELLO_REQ_A:
283 case SSL3_ST_SW_HELLO_REQ_B:
286 ret=ssl3_send_hello_request(s);
287 if (ret <= 0) goto end;
288 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
289 s->state=SSL3_ST_SW_FLUSH;
292 ssl3_init_finished_mac(s);
295 case SSL3_ST_SW_HELLO_REQ_C:
299 case SSL3_ST_SR_CLNT_HELLO_A:
300 case SSL3_ST_SR_CLNT_HELLO_B:
301 case SSL3_ST_SR_CLNT_HELLO_C:
304 ret=ssl3_get_client_hello(s);
305 if (ret <= 0) goto end;
308 s->state=SSL3_ST_SW_SRVR_HELLO_A;
312 case SSL3_ST_SW_SRVR_HELLO_A:
313 case SSL3_ST_SW_SRVR_HELLO_B:
314 ret=ssl3_send_server_hello(s);
315 if (ret <= 0) goto end;
318 s->state=SSL3_ST_SW_CHANGE_A;
320 s->state=SSL3_ST_SW_CERT_A;
324 case SSL3_ST_SW_CERT_A:
325 case SSL3_ST_SW_CERT_B:
326 /* Check if it is anon DH or anon ECDH, */
327 /* normal PSK or KRB5 */
328 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)
329 && !(s->s3->tmp.new_cipher->algorithms & SSL_kPSK)
330 && !(s->s3->tmp.new_cipher->algorithms & SSL_aKRB5))
332 ret=ssl3_send_server_certificate(s);
333 if (ret <= 0) goto end;
337 s->state=SSL3_ST_SW_KEY_EXCH_A;
341 case SSL3_ST_SW_KEY_EXCH_A:
342 case SSL3_ST_SW_KEY_EXCH_B:
343 l=s->s3->tmp.new_cipher->algorithms;
345 /* clear this, it may get reset by
346 * send_server_key_exchange */
347 if ((s->options & SSL_OP_EPHEMERAL_RSA)
348 #ifndef OPENSSL_NO_KRB5
350 #endif /* OPENSSL_NO_KRB5 */
352 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
353 * even when forbidden by protocol specs
354 * (handshake may fail as clients are not required to
355 * be able to handle this) */
356 s->s3->tmp.use_rsa_tmp=1;
358 s->s3->tmp.use_rsa_tmp=0;
361 /* only send if a DH key exchange, fortezza or
362 * RSA but we have a sign only certificate
364 * PSK: may send PSK identity hints
366 * For ECC ciphersuites, we send a serverKeyExchange
367 * message only if the cipher suite is either
368 * ECDH-anon or ECDHE. In other cases, the
369 * server certificate contains the server's
370 * public key for key exchange.
372 if (s->s3->tmp.use_rsa_tmp
373 /* PSK: send ServerKeyExchange if PSK identity
374 * hint if provided */
375 #ifndef OPENSSL_NO_PSK
376 || ((l & SSL_kPSK) && s->ctx->psk_identity_hint)
381 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
382 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
383 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
389 ret=ssl3_send_server_key_exchange(s);
390 if (ret <= 0) goto end;
395 s->state=SSL3_ST_SW_CERT_REQ_A;
399 case SSL3_ST_SW_CERT_REQ_A:
400 case SSL3_ST_SW_CERT_REQ_B:
401 if (/* don't request cert unless asked for it: */
402 !(s->verify_mode & SSL_VERIFY_PEER) ||
403 /* if SSL_VERIFY_CLIENT_ONCE is set,
404 * don't request cert during re-negotiation: */
405 ((s->session->peer != NULL) &&
406 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
407 /* never request cert in anonymous ciphersuites
408 * (see section "Certificate request" in SSL 3 drafts
409 * and in RFC 2246): */
410 ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) &&
411 /* ... except when the application insists on verification
412 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
413 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
414 /* never request cert in Kerberos ciphersuites */
415 (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5)
416 /* With normal PSK Certificates and
417 * Certificate Requests are omitted */
418 || (s->s3->tmp.new_cipher->algorithms & SSL_kPSK))
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:
450 /* number of bytes to be flushed */
451 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
454 s->rwstate=SSL_WRITING;
455 num1=BIO_flush(s->wbio);
456 if (num1 <= 0) { ret= -1; goto end; }
457 s->rwstate=SSL_NOTHING;
460 s->state=s->s3->tmp.next_state;
463 case SSL3_ST_SR_CERT_A:
464 case SSL3_ST_SR_CERT_B:
465 /* Check for second client hello (MS SGC) */
466 ret = ssl3_check_client_hello(s);
470 s->state = SSL3_ST_SR_CLNT_HELLO_C;
472 if (s->s3->tmp.cert_request)
474 ret=ssl3_get_client_certificate(s);
475 if (ret <= 0) goto end;
478 s->state=SSL3_ST_SR_KEY_EXCH_A;
482 case SSL3_ST_SR_KEY_EXCH_A:
483 case SSL3_ST_SR_KEY_EXCH_B:
484 ret=ssl3_get_client_key_exchange(s);
489 /* For the ECDH ciphersuites when
490 * the client sends its ECDH pub key in
491 * a certificate, the CertificateVerify
492 * message is not sent.
494 s->state=SSL3_ST_SR_FINISHED_A;
499 s->state=SSL3_ST_SR_CERT_VRFY_A;
502 /* We need to get hashes here so if there is
503 * a client cert, it can be verified
505 s->method->ssl3_enc->cert_verify_mac(s,
506 &(s->s3->finish_dgst1),
507 &(s->s3->tmp.cert_verify_md[0]));
508 s->method->ssl3_enc->cert_verify_mac(s,
509 &(s->s3->finish_dgst2),
510 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
514 case SSL3_ST_SR_CERT_VRFY_A:
515 case SSL3_ST_SR_CERT_VRFY_B:
517 /* we should decide if we expected this one */
518 ret=ssl3_get_cert_verify(s);
519 if (ret <= 0) goto end;
521 s->state=SSL3_ST_SR_FINISHED_A;
525 case SSL3_ST_SR_FINISHED_A:
526 case SSL3_ST_SR_FINISHED_B:
527 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
528 SSL3_ST_SR_FINISHED_B);
529 if (ret <= 0) goto end;
533 s->state=SSL3_ST_SW_CHANGE_A;
537 case SSL3_ST_SW_CHANGE_A:
538 case SSL3_ST_SW_CHANGE_B:
540 s->session->cipher=s->s3->tmp.new_cipher;
541 if (!s->method->ssl3_enc->setup_key_block(s))
542 { ret= -1; goto end; }
544 ret=ssl3_send_change_cipher_spec(s,
545 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
547 if (ret <= 0) goto end;
548 s->state=SSL3_ST_SW_FINISHED_A;
551 if (!s->method->ssl3_enc->change_cipher_state(s,
552 SSL3_CHANGE_CIPHER_SERVER_WRITE))
560 case SSL3_ST_SW_FINISHED_A:
561 case SSL3_ST_SW_FINISHED_B:
562 ret=ssl3_send_finished(s,
563 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
564 s->method->ssl3_enc->server_finished_label,
565 s->method->ssl3_enc->server_finished_label_len);
566 if (ret <= 0) goto end;
567 s->state=SSL3_ST_SW_FLUSH;
569 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
571 s->s3->tmp.next_state=SSL_ST_OK;
576 /* clean a few things up */
577 ssl3_cleanup_key_block(s);
579 BUF_MEM_free(s->init_buf);
582 /* remove buffering on output */
583 ssl_free_wbio_buffer(s);
587 if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
589 /* actually not necessarily a 'new' session unless
590 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
594 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
596 s->ctx->stats.sess_accept_good++;
598 s->handshake_func=ssl3_accept;
600 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
608 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
614 if (!s->s3->tmp.reuse_message && !skip)
618 if ((ret=BIO_flush(s->wbio)) <= 0)
623 if ((cb != NULL) && (s->state != state))
627 cb(s,SSL_CB_ACCEPT_LOOP,1);
634 /* BIO_flush(s->wbio); */
638 cb(s,SSL_CB_ACCEPT_EXIT,ret);
642 int ssl3_send_hello_request(SSL *s)
646 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
648 p=(unsigned char *)s->init_buf->data;
649 *(p++)=SSL3_MT_HELLO_REQUEST;
654 s->state=SSL3_ST_SW_HELLO_REQ_B;
655 /* number of bytes to write */
660 /* SSL3_ST_SW_HELLO_REQ_B */
661 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
664 int ssl3_check_client_hello(SSL *s)
669 /* this function is called when we really expect a Certificate message,
670 * so permit appropriate message length */
671 n=s->method->ssl_get_message(s,
677 if (!ok) return((int)n);
678 s->s3->tmp.reuse_message = 1;
679 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
681 /* Throw away what we have done so far in the current handshake,
682 * which will now be aborted. (A full SSL_clear would be too much.)
683 * I hope that tmp.dh is the only thing that may need to be cleared
684 * when a handshake is not completed ... */
685 #ifndef OPENSSL_NO_DH
686 if (s->s3->tmp.dh != NULL)
688 DH_free(s->s3->tmp.dh);
689 s->s3->tmp.dh = NULL;
697 int ssl3_get_client_hello(SSL *s)
699 int i,j,ok,al,ret= -1;
700 unsigned int cookie_len;
703 unsigned char *p,*d,*q;
705 #ifndef OPENSSL_NO_COMP
708 STACK_OF(SSL_CIPHER) *ciphers=NULL;
710 /* We do this so that we will respond with our native type.
711 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
712 * This down switching should be handled by a different method.
713 * If we are SSLv3, we will respond with SSLv3, even if prompted with
716 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
718 s->state=SSL3_ST_SR_CLNT_HELLO_B;
721 n=s->method->ssl_get_message(s,
722 SSL3_ST_SR_CLNT_HELLO_B,
723 SSL3_ST_SR_CLNT_HELLO_C,
724 SSL3_MT_CLIENT_HELLO,
725 SSL3_RT_MAX_PLAIN_LENGTH,
728 if (!ok) return((int)n);
730 d=p=(unsigned char *)s->init_msg;
732 /* use version from inside client hello, not from record header
733 * (may differ: see RFC 2246, Appendix E, second paragraph) */
734 s->client_version=(((int)p[0])<<8)|(int)p[1];
737 if (s->client_version < s->version)
739 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
740 if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
742 /* similar to ssl3_get_record, send alert using remote version number */
743 s->version = s->client_version;
745 al = SSL_AD_PROTOCOL_VERSION;
749 /* load the client random */
750 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
753 /* get the session-id */
757 /* Versions before 0.9.7 always allow session reuse during renegotiation
758 * (i.e. when s->new_session is true), option
759 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7.
760 * Maybe this optional behaviour should always have been the default,
761 * but we cannot safely change the default behaviour (or new applications
762 * might be written that become totally unsecure when compiled with
763 * an earlier library version)
765 if (j == 0 || (s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
767 if (!ssl_get_new_session(s,1))
772 i=ssl_get_prev_session(s,p,j);
774 { /* previous session */
781 if (!ssl_get_new_session(s,1))
788 if (SSL_version(s) == DTLS1_VERSION)
793 if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
794 s->d1->send_cookie == 0)
796 /* HelloVerifyMessage has already been sent */
797 if ( cookie_len != s->d1->cookie_len)
799 al = SSL_AD_HANDSHAKE_FAILURE;
800 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
806 * The ClientHello may contain a cookie even if the
807 * HelloVerify message has not been sent--make sure that it
808 * does not cause an overflow.
810 if ( cookie_len > sizeof(s->d1->rcvd_cookie))
813 al = SSL_AD_DECODE_ERROR;
814 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
818 /* verify the cookie if appropriate option is set. */
819 if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
822 memcpy(s->d1->rcvd_cookie, p, cookie_len);
824 if ( s->ctx->app_verify_cookie_cb != NULL)
826 if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie,
829 al=SSL_AD_HANDSHAKE_FAILURE;
830 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
831 SSL_R_COOKIE_MISMATCH);
834 /* else cookie verification succeeded */
836 else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie,
837 s->d1->cookie_len) != 0) /* default verification */
839 al=SSL_AD_HANDSHAKE_FAILURE;
840 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
841 SSL_R_COOKIE_MISMATCH);
850 if ((i == 0) && (j != 0))
852 /* we need a cipher if we are not resuming a session */
853 al=SSL_AD_ILLEGAL_PARAMETER;
854 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
859 /* not enough data */
860 al=SSL_AD_DECODE_ERROR;
861 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
864 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
871 /* If it is a hit, check that the cipher is in the list */
872 if ((s->hit) && (i > 0))
875 id=s->session->cipher->id;
878 printf("client sent %d ciphers\n",sk_num(ciphers));
880 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
882 c=sk_SSL_CIPHER_value(ciphers,i);
884 printf("client [%2d of %2d]:%s\n",
885 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
895 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
897 /* Very bad for multi-threading.... */
898 s->session->cipher=sk_SSL_CIPHER_value(ciphers, 0);
902 /* we need to have the cipher in the cipher
903 * list if we are asked to reuse it */
904 al=SSL_AD_ILLEGAL_PARAMETER;
905 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
915 /* not enough data */
916 al=SSL_AD_DECODE_ERROR;
917 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
923 if (p[j] == 0) break;
930 al=SSL_AD_DECODE_ERROR;
931 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
935 #ifndef OPENSSL_NO_TLSEXT
937 if (s->version > SSL3_VERSION)
939 if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al))
941 /* 'al' set by ssl_parse_clienthello_tlsext */
942 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT);
946 if (ssl_check_clienthello_tlsext(s) <= 0) {
947 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLSEXT);
952 /* Worst case, we will use the NULL compression, but if we have other
953 * options, we will now look for them. We have i-1 compression
954 * algorithms from the client, starting at q. */
955 s->s3->tmp.new_compression=NULL;
956 #ifndef OPENSSL_NO_COMP
957 if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods)
958 { /* See if we have a match */
961 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
964 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
977 s->s3->tmp.new_compression=comp;
983 /* Given s->session->ciphers and SSL_get_ciphers, we must
988 #ifdef OPENSSL_NO_COMP
989 s->session->compress_meth=0;
991 s->session->compress_meth=(comp == NULL)?0:comp->id;
993 if (s->session->ciphers != NULL)
994 sk_SSL_CIPHER_free(s->session->ciphers);
995 s->session->ciphers=ciphers;
998 al=SSL_AD_ILLEGAL_PARAMETER;
999 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
1003 c=ssl3_choose_cipher(s,s->session->ciphers,
1004 SSL_get_ciphers(s));
1008 al=SSL_AD_HANDSHAKE_FAILURE;
1009 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
1012 s->s3->tmp.new_cipher=c;
1016 /* Session-id reuse */
1017 #ifdef REUSE_CIPHER_BUG
1018 STACK_OF(SSL_CIPHER) *sk;
1019 SSL_CIPHER *nc=NULL;
1020 SSL_CIPHER *ec=NULL;
1022 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
1024 sk=s->session->ciphers;
1025 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1027 c=sk_SSL_CIPHER_value(sk,i);
1028 if (c->algorithms & SSL_eNULL)
1030 if (SSL_C_IS_EXPORT(c))
1034 s->s3->tmp.new_cipher=nc;
1035 else if (ec != NULL)
1036 s->s3->tmp.new_cipher=ec;
1038 s->s3->tmp.new_cipher=s->session->cipher;
1042 s->s3->tmp.new_cipher=s->session->cipher;
1045 /* we now have the following setup.
1047 * cipher_list - our prefered list of ciphers
1048 * ciphers - the clients prefered list of ciphers
1049 * compression - basically ignored right now
1050 * ssl version is set - sslv3
1051 * s->session - The ssl session has been setup.
1052 * s->hit - session reuse flag
1053 * s->tmp.new_cipher - the new cipher to use.
1060 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1063 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
1067 int ssl3_send_server_hello(SSL *s)
1070 unsigned char *p,*d;
1072 unsigned long l,Time;
1074 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
1076 buf=(unsigned char *)s->init_buf->data;
1077 p=s->s3->server_random;
1078 Time=(unsigned long)time(NULL); /* Time */
1080 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
1082 /* Do the message type and length last */
1085 *(p++)=s->version>>8;
1086 *(p++)=s->version&0xff;
1089 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
1090 p+=SSL3_RANDOM_SIZE;
1092 /* now in theory we have 3 options to sending back the
1093 * session id. If it is a re-use, we send back the
1094 * old session-id, if it is a new session, we send
1095 * back the new session-id or we send back a 0 length
1096 * session-id if we want it to be single use.
1097 * Currently I will not implement the '0' length session-id
1098 * 12-Jan-98 - I'll now support the '0' length stuff.
1100 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
1101 s->session->session_id_length=0;
1103 sl=s->session->session_id_length;
1104 if (sl > (int)sizeof(s->session->session_id))
1106 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1110 memcpy(p,s->session->session_id,sl);
1113 /* put the cipher */
1114 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
1117 /* put the compression method */
1118 #ifdef OPENSSL_NO_COMP
1121 if (s->s3->tmp.new_compression == NULL)
1124 *(p++)=s->s3->tmp.new_compression->id;
1126 #ifndef OPENSSL_NO_TLSEXT
1127 if (ssl_prepare_serverhello_tlsext(s) <= 0)
1129 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1132 if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
1134 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
1142 *(d++)=SSL3_MT_SERVER_HELLO;
1145 s->state=SSL3_ST_CW_CLNT_HELLO_B;
1146 /* number of bytes to write */
1151 /* SSL3_ST_CW_CLNT_HELLO_B */
1152 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1155 int ssl3_send_server_done(SSL *s)
1159 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
1161 p=(unsigned char *)s->init_buf->data;
1164 *(p++)=SSL3_MT_SERVER_DONE;
1169 s->state=SSL3_ST_SW_SRVR_DONE_B;
1170 /* number of bytes to write */
1175 /* SSL3_ST_CW_CLNT_HELLO_B */
1176 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1179 int ssl3_send_server_key_exchange(SSL *s)
1181 #ifndef OPENSSL_NO_RSA
1185 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1188 #ifndef OPENSSL_NO_DH
1191 #ifndef OPENSSL_NO_ECDH
1192 EC_KEY *ecdh=NULL, *ecdhp;
1193 unsigned char *encodedPoint = NULL;
1196 BN_CTX *bn_ctx = NULL;
1199 unsigned char *p,*d;
1209 EVP_MD_CTX_init(&md_ctx);
1210 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1212 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
1217 r[0]=r[1]=r[2]=r[3]=NULL;
1219 #ifndef OPENSSL_NO_RSA
1220 if (type & SSL_kRSA)
1223 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1225 rsa=s->cert->rsa_tmp_cb(s,
1226 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1227 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1230 al=SSL_AD_HANDSHAKE_FAILURE;
1231 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1239 al=SSL_AD_HANDSHAKE_FAILURE;
1240 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1245 s->s3->tmp.use_rsa_tmp=1;
1249 #ifndef OPENSSL_NO_DH
1250 if (type & SSL_kEDH)
1253 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1254 dhp=s->cert->dh_tmp_cb(s,
1255 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1256 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1259 al=SSL_AD_HANDSHAKE_FAILURE;
1260 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1264 if (s->s3->tmp.dh != NULL)
1267 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1271 if ((dh=DHparams_dup(dhp)) == NULL)
1273 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1278 if ((dhp->pub_key == NULL ||
1279 dhp->priv_key == NULL ||
1280 (s->options & SSL_OP_SINGLE_DH_USE)))
1282 if(!DH_generate_key(dh))
1284 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1291 dh->pub_key=BN_dup(dhp->pub_key);
1292 dh->priv_key=BN_dup(dhp->priv_key);
1293 if ((dh->pub_key == NULL) ||
1294 (dh->priv_key == NULL))
1296 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1306 #ifndef OPENSSL_NO_ECDH
1307 if (type & SSL_kEECDH)
1309 const EC_GROUP *group;
1311 ecdhp=cert->ecdh_tmp;
1312 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1314 ecdhp=s->cert->ecdh_tmp_cb(s,
1315 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1316 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1320 al=SSL_AD_HANDSHAKE_FAILURE;
1321 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1325 if (s->s3->tmp.ecdh != NULL)
1327 EC_KEY_free(s->s3->tmp.ecdh);
1328 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1332 /* Duplicate the ECDH structure. */
1335 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1338 if (!EC_KEY_up_ref(ecdhp))
1340 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1345 s->s3->tmp.ecdh=ecdh;
1346 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
1347 (EC_KEY_get0_private_key(ecdh) == NULL) ||
1348 (s->options & SSL_OP_SINGLE_ECDH_USE))
1350 if(!EC_KEY_generate_key(ecdh))
1352 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1357 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
1358 (EC_KEY_get0_public_key(ecdh) == NULL) ||
1359 (EC_KEY_get0_private_key(ecdh) == NULL))
1361 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1365 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1366 (EC_GROUP_get_degree(group) > 163))
1368 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1372 /* XXX: For now, we only support ephemeral ECDH
1373 * keys over named (not generic) curves. For
1374 * supported named curves, curve_id is non-zero.
1377 tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
1380 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1384 /* Encode the public key.
1385 * First check the size of encoding and
1386 * allocate memory accordingly.
1388 encodedlen = EC_POINT_point2oct(group,
1389 EC_KEY_get0_public_key(ecdh),
1390 POINT_CONVERSION_UNCOMPRESSED,
1393 encodedPoint = (unsigned char *)
1394 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1395 bn_ctx = BN_CTX_new();
1396 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1398 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1403 encodedlen = EC_POINT_point2oct(group,
1404 EC_KEY_get0_public_key(ecdh),
1405 POINT_CONVERSION_UNCOMPRESSED,
1406 encodedPoint, encodedlen, bn_ctx);
1408 if (encodedlen == 0)
1410 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1414 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1416 /* XXX: For now, we only support named (not
1417 * generic) curves in ECDH ephemeral key exchanges.
1418 * In this situation, we need four additional bytes
1419 * to encode the entire ServerECDHParams
1424 /* We'll generate the serverKeyExchange message
1425 * explicitly so we can set these to NULLs
1433 #endif /* !OPENSSL_NO_ECDH */
1434 #ifndef OPENSSL_NO_PSK
1435 if (type & SSL_kPSK)
1437 /* reserve size for record length and PSK identity hint*/
1438 n+=2+strlen(s->ctx->psk_identity_hint);
1441 #endif /* !OPENSSL_NO_PSK */
1443 al=SSL_AD_HANDSHAKE_FAILURE;
1444 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1447 for (i=0; r[i] != NULL; i++)
1449 nr[i]=BN_num_bytes(r[i]);
1453 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)
1454 && !(s->s3->tmp.new_cipher->algorithms & SSL_kPSK))
1456 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1459 al=SSL_AD_DECODE_ERROR;
1462 kn=EVP_PKEY_size(pkey);
1470 if (!BUF_MEM_grow_clean(buf,n+4+kn))
1472 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1475 d=(unsigned char *)s->init_buf->data;
1478 for (i=0; r[i] != NULL; i++)
1485 #ifndef OPENSSL_NO_ECDH
1486 if (type & SSL_kEECDH)
1488 /* XXX: For now, we only support named (not generic) curves.
1489 * In this situation, the serverKeyExchange message has:
1490 * [1 byte CurveType], [2 byte CurveName]
1491 * [1 byte length of encoded point], followed by
1492 * the actual encoded point itself
1494 *p = NAMED_CURVE_TYPE;
1502 memcpy((unsigned char*)p,
1503 (unsigned char *)encodedPoint,
1505 OPENSSL_free(encodedPoint);
1510 #ifndef OPENSSL_NO_PSK
1511 if (type & SSL_kPSK)
1513 /* copy PSK identity hint */
1514 s2n(strlen(s->ctx->psk_identity_hint), p);
1515 strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint));
1516 p+=strlen(s->ctx->psk_identity_hint);
1523 /* n is the length of the params, they start at &(d[4])
1524 * and p points to the space at the end. */
1525 #ifndef OPENSSL_NO_RSA
1526 if (pkey->type == EVP_PKEY_RSA)
1530 for (num=2; num > 0; num--)
1532 EVP_DigestInit_ex(&md_ctx,(num == 2)
1533 ?s->ctx->md5:s->ctx->sha1, NULL);
1534 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1535 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1536 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1537 EVP_DigestFinal_ex(&md_ctx,q,
1538 (unsigned int *)&i);
1542 if (RSA_sign(NID_md5_sha1, md_buf, j,
1543 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1545 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1553 #if !defined(OPENSSL_NO_DSA)
1554 if (pkey->type == EVP_PKEY_DSA)
1557 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1558 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1559 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1560 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1561 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1562 (unsigned int *)&i,pkey))
1564 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1572 #if !defined(OPENSSL_NO_ECDSA)
1573 if (pkey->type == EVP_PKEY_EC)
1575 /* let's do ECDSA */
1576 EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1577 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1578 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1579 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1580 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1581 (unsigned int *)&i,pkey))
1583 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
1592 /* Is this error check actually needed? */
1593 al=SSL_AD_HANDSHAKE_FAILURE;
1594 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1599 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1602 /* we should now have things packed up, so lets send
1608 s->state = SSL3_ST_SW_KEY_EXCH_B;
1609 EVP_MD_CTX_cleanup(&md_ctx);
1610 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1612 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1614 #ifndef OPENSSL_NO_ECDH
1615 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1616 BN_CTX_free(bn_ctx);
1618 EVP_MD_CTX_cleanup(&md_ctx);
1622 int ssl3_send_certificate_request(SSL *s)
1624 unsigned char *p,*d;
1626 STACK_OF(X509_NAME) *sk=NULL;
1630 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1634 d=p=(unsigned char *)&(buf->data[4]);
1636 /* get the list of acceptable cert types */
1638 n=ssl3_get_req_cert_type(s,p);
1647 sk=SSL_get_client_CA_list(s);
1651 for (i=0; i<sk_X509_NAME_num(sk); i++)
1653 name=sk_X509_NAME_value(sk,i);
1654 j=i2d_X509_NAME(name,NULL);
1655 if (!BUF_MEM_grow_clean(buf,4+n+j+2))
1657 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1660 p=(unsigned char *)&(buf->data[4+n]);
1661 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1664 i2d_X509_NAME(name,&p);
1671 i2d_X509_NAME(name,&p);
1672 j-=2; s2n(j,d); j+=2;
1678 /* else no CA names */
1679 p=(unsigned char *)&(buf->data[4+off]);
1682 d=(unsigned char *)buf->data;
1683 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1686 /* we should now have things packed up, so lets send
1691 #ifdef NETSCAPE_HANG_BUG
1692 p=(unsigned char *)s->init_buf->data + s->init_num;
1695 *(p++)=SSL3_MT_SERVER_DONE;
1702 s->state = SSL3_ST_SW_CERT_REQ_B;
1705 /* SSL3_ST_SW_CERT_REQ_B */
1706 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1711 int ssl3_get_client_key_exchange(SSL *s)
1717 #ifndef OPENSSL_NO_RSA
1719 EVP_PKEY *pkey=NULL;
1721 #ifndef OPENSSL_NO_DH
1725 #ifndef OPENSSL_NO_KRB5
1727 #endif /* OPENSSL_NO_KRB5 */
1729 #ifndef OPENSSL_NO_ECDH
1730 EC_KEY *srvr_ecdh = NULL;
1731 EVP_PKEY *clnt_pub_pkey = NULL;
1732 EC_POINT *clnt_ecpoint = NULL;
1733 BN_CTX *bn_ctx = NULL;
1736 n=s->method->ssl_get_message(s,
1737 SSL3_ST_SR_KEY_EXCH_A,
1738 SSL3_ST_SR_KEY_EXCH_B,
1739 SSL3_MT_CLIENT_KEY_EXCHANGE,
1743 if (!ok) return((int)n);
1744 p=(unsigned char *)s->init_msg;
1746 l=s->s3->tmp.new_cipher->algorithms;
1748 #ifndef OPENSSL_NO_RSA
1751 /* FIX THIS UP EAY EAY EAY EAY */
1752 if (s->s3->tmp.use_rsa_tmp)
1754 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1755 rsa=s->cert->rsa_tmp;
1756 /* Don't do a callback because rsa_tmp should
1757 * be sent already */
1760 al=SSL_AD_HANDSHAKE_FAILURE;
1761 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1768 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1769 if ( (pkey == NULL) ||
1770 (pkey->type != EVP_PKEY_RSA) ||
1771 (pkey->pkey.rsa == NULL))
1773 al=SSL_AD_HANDSHAKE_FAILURE;
1774 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1781 if (s->version > SSL3_VERSION)
1786 if (!(s->options & SSL_OP_TLS_D5_BUG))
1788 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1798 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1802 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1804 al=SSL_AD_DECODE_ERROR;
1805 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */
1808 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1810 /* The premaster secret must contain the same version number as the
1811 * ClientHello to detect version rollback attacks (strangely, the
1812 * protocol does not offer such protection for DH ciphersuites).
1813 * However, buggy clients exist that send the negotiated protocol
1814 * version instead if the server does not support the requested
1816 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1817 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1818 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1820 al=SSL_AD_DECODE_ERROR;
1821 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */
1823 /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack
1824 * (http://eprint.iacr.org/2003/052/) exploits the version
1825 * number check as a "bad version oracle" -- an alert would
1826 * reveal that the plaintext corresponding to some ciphertext
1827 * made up by the adversary is properly formatted except
1828 * that the version number is wrong. To avoid such attacks,
1829 * we should treat this just like any other decryption error. */
1835 /* Some decryption failure -- use random value instead as countermeasure
1836 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1837 * (see RFC 2246, section 7.4.7.1). */
1839 i = SSL_MAX_MASTER_KEY_LENGTH;
1840 p[0] = s->client_version >> 8;
1841 p[1] = s->client_version & 0xff;
1842 if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */
1846 s->session->master_key_length=
1847 s->method->ssl3_enc->generate_master_secret(s,
1848 s->session->master_key,
1850 OPENSSL_cleanse(p,i);
1854 #ifndef OPENSSL_NO_DH
1855 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1860 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1862 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1872 if (n == 0L) /* the parameters are in the cert */
1874 al=SSL_AD_HANDSHAKE_FAILURE;
1875 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1880 if (s->s3->tmp.dh == NULL)
1882 al=SSL_AD_HANDSHAKE_FAILURE;
1883 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1887 dh_srvr=s->s3->tmp.dh;
1890 pub=BN_bin2bn(p,i,NULL);
1893 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1897 i=DH_compute_key(p,pub,dh_srvr);
1901 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1905 DH_free(s->s3->tmp.dh);
1910 s->session->master_key_length=
1911 s->method->ssl3_enc->generate_master_secret(s,
1912 s->session->master_key,p,i);
1913 OPENSSL_cleanse(p,i);
1917 #ifndef OPENSSL_NO_KRB5
1920 krb5_error_code krb5rc;
1921 krb5_data enc_ticket;
1922 krb5_data authenticator;
1924 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1925 EVP_CIPHER_CTX ciph_ctx;
1926 EVP_CIPHER *enc = NULL;
1927 unsigned char iv[EVP_MAX_IV_LENGTH];
1928 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
1929 + EVP_MAX_BLOCK_LENGTH];
1931 krb5_timestamp authtime = 0;
1932 krb5_ticket_times ttimes;
1934 EVP_CIPHER_CTX_init(&ciph_ctx);
1936 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1939 enc_ticket.length = i;
1941 if (n < enc_ticket.length + 6)
1943 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1944 SSL_R_DATA_LENGTH_TOO_LONG);
1948 enc_ticket.data = (char *)p;
1949 p+=enc_ticket.length;
1952 authenticator.length = i;
1954 if (n < enc_ticket.length + authenticator.length + 6)
1956 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1957 SSL_R_DATA_LENGTH_TOO_LONG);
1961 authenticator.data = (char *)p;
1962 p+=authenticator.length;
1966 enc_pms.data = (char *)p;
1969 /* Note that the length is checked again below,
1972 if(enc_pms.length > sizeof pms)
1974 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1975 SSL_R_DATA_LENGTH_TOO_LONG);
1979 if (n != (long)(enc_ticket.length + authenticator.length +
1980 enc_pms.length + 6))
1982 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1983 SSL_R_DATA_LENGTH_TOO_LONG);
1987 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
1991 printf("kssl_sget_tkt rtn %d [%d]\n",
1992 krb5rc, kssl_err.reason);
1994 printf("kssl_err text= %s\n", kssl_err.text);
1995 #endif /* KSSL_DEBUG */
1996 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2001 /* Note: no authenticator is not considered an error,
2002 ** but will return authtime == 0.
2004 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
2005 &authtime, &kssl_err)) != 0)
2008 printf("kssl_check_authent rtn %d [%d]\n",
2009 krb5rc, kssl_err.reason);
2011 printf("kssl_err text= %s\n", kssl_err.text);
2012 #endif /* KSSL_DEBUG */
2013 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2018 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
2020 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc);
2025 kssl_ctx_show(kssl_ctx);
2026 #endif /* KSSL_DEBUG */
2028 enc = kssl_map_enc(kssl_ctx->enctype);
2032 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2034 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
2036 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2037 SSL_R_DECRYPTION_FAILED);
2040 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
2041 (unsigned char *)enc_pms.data, enc_pms.length))
2043 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2044 SSL_R_DECRYPTION_FAILED);
2047 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2049 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2050 SSL_R_DATA_LENGTH_TOO_LONG);
2053 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
2055 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2056 SSL_R_DECRYPTION_FAILED);
2060 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2062 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2063 SSL_R_DATA_LENGTH_TOO_LONG);
2066 if (!((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
2068 /* The premaster secret must contain the same version number as the
2069 * ClientHello to detect version rollback attacks (strangely, the
2070 * protocol does not offer such protection for DH ciphersuites).
2071 * However, buggy clients exist that send random bytes instead of
2072 * the protocol version.
2073 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients.
2074 * (Perhaps we should have a separate BUG value for the Kerberos cipher)
2076 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
2077 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
2079 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2080 SSL_AD_DECODE_ERROR);
2085 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2087 s->session->master_key_length=
2088 s->method->ssl3_enc->generate_master_secret(s,
2089 s->session->master_key, pms, outl);
2091 if (kssl_ctx->client_princ)
2093 size_t len = strlen(kssl_ctx->client_princ);
2094 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
2096 s->session->krb5_client_princ_len = len;
2097 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
2102 /* Was doing kssl_ctx_free() here,
2103 ** but it caused problems for apache.
2104 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
2105 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
2109 #endif /* OPENSSL_NO_KRB5 */
2111 #ifndef OPENSSL_NO_ECDH
2112 if ((l & SSL_kECDH) || (l & SSL_kEECDH))
2117 const EC_GROUP *group;
2118 const BIGNUM *priv_key;
2120 /* initialize structures for server's ECDH key pair */
2121 if ((srvr_ecdh = EC_KEY_new()) == NULL)
2123 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2124 ERR_R_MALLOC_FAILURE);
2128 /* Let's get server private key and group information */
2131 /* use the certificate */
2132 tkey = s->cert->key->privatekey->pkey.ec;
2136 /* use the ephermeral values we saved when
2137 * generating the ServerKeyExchange msg.
2139 tkey = s->s3->tmp.ecdh;
2142 group = EC_KEY_get0_group(tkey);
2143 priv_key = EC_KEY_get0_private_key(tkey);
2145 if (!EC_KEY_set_group(srvr_ecdh, group) ||
2146 !EC_KEY_set_private_key(srvr_ecdh, priv_key))
2148 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2153 /* Let's get client's public key */
2154 if ((clnt_ecpoint = EC_POINT_new(group)) == NULL)
2156 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2157 ERR_R_MALLOC_FAILURE);
2163 /* Client Publickey was in Client Certificate */
2167 al=SSL_AD_HANDSHAKE_FAILURE;
2168 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
2171 if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer))
2173 (clnt_pub_pkey->type != EVP_PKEY_EC))
2175 /* XXX: For now, we do not support client
2176 * authentication using ECDH certificates
2177 * so this branch (n == 0L) of the code is
2178 * never executed. When that support is
2179 * added, we ought to ensure the key
2180 * received in the certificate is
2181 * authorized for key agreement.
2182 * ECDH_compute_key implicitly checks that
2183 * the two ECDH shares are for the same
2186 al=SSL_AD_HANDSHAKE_FAILURE;
2187 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2188 SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
2192 if (EC_POINT_copy(clnt_ecpoint,
2193 EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0)
2195 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2199 ret = 2; /* Skip certificate verify processing */
2203 /* Get client's public key from encoded point
2204 * in the ClientKeyExchange message.
2206 if ((bn_ctx = BN_CTX_new()) == NULL)
2208 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2209 ERR_R_MALLOC_FAILURE);
2213 /* Get encoded point length */
2216 if (EC_POINT_oct2point(group,
2217 clnt_ecpoint, p, i, bn_ctx) == 0)
2219 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2223 /* p is pointing to somewhere in the buffer
2224 * currently, so set it to the start
2226 p=(unsigned char *)s->init_buf->data;
2229 /* Compute the shared pre-master secret */
2230 field_size = EC_GROUP_get_degree(group);
2231 if (field_size <= 0)
2233 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2237 i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL);
2240 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2245 EVP_PKEY_free(clnt_pub_pkey);
2246 EC_POINT_free(clnt_ecpoint);
2247 if (srvr_ecdh != NULL)
2248 EC_KEY_free(srvr_ecdh);
2249 BN_CTX_free(bn_ctx);
2251 /* Compute the master secret */
2252 s->session->master_key_length = s->method->ssl3_enc-> \
2253 generate_master_secret(s, s->session->master_key, p, i);
2255 OPENSSL_cleanse(p, i);
2260 #ifndef OPENSSL_NO_PSK
2263 unsigned char *t = NULL;
2264 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2265 unsigned int pre_ms_len = 0, psk_len = 0;
2267 char tmp_id[PSK_MAX_IDENTITY_LEN+1];
2269 al=SSL_AD_HANDSHAKE_FAILURE;
2274 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2275 SSL_R_LENGTH_MISMATCH);
2278 if (i > PSK_MAX_IDENTITY_LEN)
2280 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2281 SSL_R_DATA_LENGTH_TOO_LONG);
2284 if (s->psk_server_callback == NULL)
2286 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2287 SSL_R_PSK_NO_SERVER_CB);
2291 /* Create guaranteed NULL-terminated identity
2292 * string for the callback */
2293 memcpy(tmp_id, p, i);
2294 memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
2295 psk_len = s->psk_server_callback(s, tmp_id,
2296 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2297 OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1);
2299 if (psk_len > PSK_MAX_PSK_LEN)
2301 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2302 ERR_R_INTERNAL_ERROR);
2305 else if (psk_len == 0)
2307 /* PSK related to the given identity not found */
2308 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2309 SSL_R_PSK_IDENTITY_NOT_FOUND);
2310 al=SSL_AD_UNKNOWN_PSK_IDENTITY;
2314 /* create PSK pre_master_secret */
2315 pre_ms_len=2+psk_len+2+psk_len;
2317 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2319 memset(t, 0, psk_len);
2323 if (s->session->psk_identity != NULL)
2324 OPENSSL_free(s->session->psk_identity);
2325 s->session->psk_identity = BUF_strdup((char *)p);
2326 if (s->session->psk_identity == NULL)
2328 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2329 ERR_R_MALLOC_FAILURE);
2333 if (s->session->psk_identity_hint != NULL)
2334 OPENSSL_free(s->session->psk_identity_hint);
2335 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2336 if (s->ctx->psk_identity_hint != NULL &&
2337 s->session->psk_identity_hint == NULL)
2339 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2340 ERR_R_MALLOC_FAILURE);
2344 s->session->master_key_length=
2345 s->method->ssl3_enc->generate_master_secret(s,
2346 s->session->master_key, psk_or_pre_ms, pre_ms_len);
2349 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2356 al=SSL_AD_HANDSHAKE_FAILURE;
2357 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2358 SSL_R_UNKNOWN_CIPHER_TYPE);
2364 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2365 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH)
2368 #ifndef OPENSSL_NO_ECDH
2369 EVP_PKEY_free(clnt_pub_pkey);
2370 EC_POINT_free(clnt_ecpoint);
2371 if (srvr_ecdh != NULL)
2372 EC_KEY_free(srvr_ecdh);
2373 BN_CTX_free(bn_ctx);
2378 int ssl3_get_cert_verify(SSL *s)
2380 EVP_PKEY *pkey=NULL;
2387 n=s->method->ssl_get_message(s,
2388 SSL3_ST_SR_CERT_VRFY_A,
2389 SSL3_ST_SR_CERT_VRFY_B,
2394 if (!ok) return((int)n);
2396 if (s->session->peer != NULL)
2398 peer=s->session->peer;
2399 pkey=X509_get_pubkey(peer);
2400 type=X509_certificate_type(peer,pkey);
2408 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
2410 s->s3->tmp.reuse_message=1;
2411 if ((peer != NULL) && (type | EVP_PKT_SIGN))
2413 al=SSL_AD_UNEXPECTED_MESSAGE;
2414 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
2423 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
2424 al=SSL_AD_UNEXPECTED_MESSAGE;
2428 if (!(type & EVP_PKT_SIGN))
2430 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
2431 al=SSL_AD_ILLEGAL_PARAMETER;
2435 if (s->s3->change_cipher_spec)
2437 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
2438 al=SSL_AD_UNEXPECTED_MESSAGE;
2442 /* we now have a signature that we need to verify */
2443 p=(unsigned char *)s->init_msg;
2448 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
2449 al=SSL_AD_DECODE_ERROR;
2453 j=EVP_PKEY_size(pkey);
2454 if ((i > j) || (n > j) || (n <= 0))
2456 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
2457 al=SSL_AD_DECODE_ERROR;
2461 #ifndef OPENSSL_NO_RSA
2462 if (pkey->type == EVP_PKEY_RSA)
2464 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
2465 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
2469 al=SSL_AD_DECRYPT_ERROR;
2470 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
2475 al=SSL_AD_DECRYPT_ERROR;
2476 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
2482 #ifndef OPENSSL_NO_DSA
2483 if (pkey->type == EVP_PKEY_DSA)
2485 j=DSA_verify(pkey->save_type,
2486 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2487 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
2491 al=SSL_AD_DECRYPT_ERROR;
2492 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
2498 #ifndef OPENSSL_NO_ECDSA
2499 if (pkey->type == EVP_PKEY_EC)
2501 j=ECDSA_verify(pkey->save_type,
2502 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2503 SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec);
2507 al=SSL_AD_DECRYPT_ERROR;
2508 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
2509 SSL_R_BAD_ECDSA_SIGNATURE);
2516 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
2517 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
2526 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2529 EVP_PKEY_free(pkey);
2533 int ssl3_get_client_certificate(SSL *s)
2535 int i,ok,al,ret= -1;
2537 unsigned long l,nc,llen,n;
2538 const unsigned char *p,*q;
2540 STACK_OF(X509) *sk=NULL;
2542 n=s->method->ssl_get_message(s,
2549 if (!ok) return((int)n);
2551 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
2553 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
2554 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2556 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2557 al=SSL_AD_HANDSHAKE_FAILURE;
2560 /* If tls asked for a client cert, the client must return a 0 list */
2561 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
2563 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
2564 al=SSL_AD_UNEXPECTED_MESSAGE;
2567 s->s3->tmp.reuse_message=1;
2571 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
2573 al=SSL_AD_UNEXPECTED_MESSAGE;
2574 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
2577 p=d=(unsigned char *)s->init_msg;
2579 if ((sk=sk_X509_new_null()) == NULL)
2581 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2588 al=SSL_AD_DECODE_ERROR;
2589 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
2592 for (nc=0; nc<llen; )
2595 if ((l+nc+3) > llen)
2597 al=SSL_AD_DECODE_ERROR;
2598 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2603 x=d2i_X509(NULL,&p,l);
2606 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
2611 al=SSL_AD_DECODE_ERROR;
2612 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2615 if (!sk_X509_push(sk,x))
2617 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2624 if (sk_X509_num(sk) <= 0)
2626 /* TLS does not mind 0 certs returned */
2627 if (s->version == SSL3_VERSION)
2629 al=SSL_AD_HANDSHAKE_FAILURE;
2630 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
2633 /* Fail for TLS only if we required a certificate */
2634 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
2635 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2637 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2638 al=SSL_AD_HANDSHAKE_FAILURE;
2644 i=ssl_verify_cert_chain(s,sk);
2647 al=ssl_verify_alarm_type(s->verify_result);
2648 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
2653 if (s->session->peer != NULL) /* This should not be needed */
2654 X509_free(s->session->peer);
2655 s->session->peer=sk_X509_shift(sk);
2656 s->session->verify_result = s->verify_result;
2658 /* With the current implementation, sess_cert will always be NULL
2659 * when we arrive here. */
2660 if (s->session->sess_cert == NULL)
2662 s->session->sess_cert = ssl_sess_cert_new();
2663 if (s->session->sess_cert == NULL)
2665 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
2669 if (s->session->sess_cert->cert_chain != NULL)
2670 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
2671 s->session->sess_cert->cert_chain=sk;
2672 /* Inconsistency alert: cert_chain does *not* include the
2673 * peer's own certificate, while we do include it in s3_clnt.c */
2681 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2684 if (x != NULL) X509_free(x);
2685 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
2689 int ssl3_send_server_certificate(SSL *s)
2694 if (s->state == SSL3_ST_SW_CERT_A)
2696 x=ssl_get_server_send_cert(s);
2698 /* VRS: allow null cert if auth == KRB5 */
2699 (s->s3->tmp.new_cipher->algorithms
2700 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
2701 != (SSL_aKRB5|SSL_kKRB5))
2703 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
2707 l=ssl3_output_cert_chain(s,x);
2708 s->state=SSL3_ST_SW_CERT_B;
2713 /* SSL3_ST_SW_CERT_B */
2714 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));