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)
719 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);
729 d=p=(unsigned char *)s->init_msg;
731 /* use version from inside client hello, not from record header
732 * (may differ: see RFC 2246, Appendix E, second paragraph) */
733 s->client_version=(((int)p[0])<<8)|(int)p[1];
736 if (s->client_version < s->version)
738 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
739 if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
741 /* similar to ssl3_get_record, send alert using remote version number */
742 s->version = s->client_version;
744 al = SSL_AD_PROTOCOL_VERSION;
748 /* load the client random */
749 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
752 /* get the session-id */
756 /* Versions before 0.9.7 always allow session reuse during renegotiation
757 * (i.e. when s->new_session is true), option
758 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7.
759 * Maybe this optional behaviour should always have been the default,
760 * but we cannot safely change the default behaviour (or new applications
761 * might be written that become totally unsecure when compiled with
762 * an earlier library version)
764 if (j == 0 || (s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
766 if (!ssl_get_new_session(s,1))
771 i=ssl_get_prev_session(s,p,j);
773 { /* previous session */
780 if (!ssl_get_new_session(s,1))
787 if (SSL_version(s) == DTLS1_VERSION)
792 if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
793 s->d1->send_cookie == 0)
795 /* HelloVerifyMessage has already been sent */
796 if ( cookie_len != s->d1->cookie_len)
798 al = SSL_AD_HANDSHAKE_FAILURE;
799 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
805 * The ClientHello may contain a cookie even if the
806 * HelloVerify message has not been sent--make sure that it
807 * does not cause an overflow.
809 if ( cookie_len > sizeof(s->d1->rcvd_cookie))
812 al = SSL_AD_DECODE_ERROR;
813 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
817 /* verify the cookie if appropriate option is set. */
818 if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
821 memcpy(s->d1->rcvd_cookie, p, cookie_len);
823 if ( s->ctx->app_verify_cookie_cb != NULL)
825 if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie,
828 al=SSL_AD_HANDSHAKE_FAILURE;
829 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
830 SSL_R_COOKIE_MISMATCH);
833 /* else cookie verification succeeded */
835 else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie,
836 s->d1->cookie_len) != 0) /* default verification */
838 al=SSL_AD_HANDSHAKE_FAILURE;
839 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
840 SSL_R_COOKIE_MISMATCH);
849 if ((i == 0) && (j != 0))
851 /* we need a cipher if we are not resuming a session */
852 al=SSL_AD_ILLEGAL_PARAMETER;
853 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
858 /* not enough data */
859 al=SSL_AD_DECODE_ERROR;
860 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
863 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
870 /* If it is a hit, check that the cipher is in the list */
871 if ((s->hit) && (i > 0))
874 id=s->session->cipher->id;
877 printf("client sent %d ciphers\n",sk_num(ciphers));
879 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
881 c=sk_SSL_CIPHER_value(ciphers,i);
883 printf("client [%2d of %2d]:%s\n",
884 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
894 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
896 /* Very bad for multi-threading.... */
897 s->session->cipher=sk_SSL_CIPHER_value(ciphers, 0);
901 /* we need to have the cipher in the cipher
902 * list if we are asked to reuse it */
903 al=SSL_AD_ILLEGAL_PARAMETER;
904 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
914 /* not enough data */
915 al=SSL_AD_DECODE_ERROR;
916 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
922 if (p[j] == 0) break;
929 al=SSL_AD_DECODE_ERROR;
930 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
934 #ifndef OPENSSL_NO_TLSEXT
936 if (s->version > SSL3_VERSION)
938 if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al))
940 /* 'al' set by ssl_parse_clienthello_tlsext */
941 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT);
945 if (ssl_check_clienthello_tlsext(s) <= 0) {
946 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLSEXT);
951 /* Worst case, we will use the NULL compression, but if we have other
952 * options, we will now look for them. We have i-1 compression
953 * algorithms from the client, starting at q. */
954 s->s3->tmp.new_compression=NULL;
955 #ifndef OPENSSL_NO_COMP
956 if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods)
957 { /* See if we have a match */
960 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
963 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
976 s->s3->tmp.new_compression=comp;
982 /* Given s->session->ciphers and SSL_get_ciphers, we must
987 #ifdef OPENSSL_NO_COMP
988 s->session->compress_meth=0;
990 s->session->compress_meth=(comp == NULL)?0:comp->id;
992 if (s->session->ciphers != NULL)
993 sk_SSL_CIPHER_free(s->session->ciphers);
994 s->session->ciphers=ciphers;
997 al=SSL_AD_ILLEGAL_PARAMETER;
998 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
1002 c=ssl3_choose_cipher(s,s->session->ciphers,
1003 SSL_get_ciphers(s));
1007 al=SSL_AD_HANDSHAKE_FAILURE;
1008 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
1011 s->s3->tmp.new_cipher=c;
1015 /* Session-id reuse */
1016 #ifdef REUSE_CIPHER_BUG
1017 STACK_OF(SSL_CIPHER) *sk;
1018 SSL_CIPHER *nc=NULL;
1019 SSL_CIPHER *ec=NULL;
1021 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
1023 sk=s->session->ciphers;
1024 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1026 c=sk_SSL_CIPHER_value(sk,i);
1027 if (c->algorithms & SSL_eNULL)
1029 if (SSL_C_IS_EXPORT(c))
1033 s->s3->tmp.new_cipher=nc;
1034 else if (ec != NULL)
1035 s->s3->tmp.new_cipher=ec;
1037 s->s3->tmp.new_cipher=s->session->cipher;
1041 s->s3->tmp.new_cipher=s->session->cipher;
1044 /* we now have the following setup.
1046 * cipher_list - our prefered list of ciphers
1047 * ciphers - the clients prefered list of ciphers
1048 * compression - basically ignored right now
1049 * ssl version is set - sslv3
1050 * s->session - The ssl session has been setup.
1051 * s->hit - session reuse flag
1052 * s->tmp.new_cipher - the new cipher to use.
1059 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1062 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
1066 int ssl3_send_server_hello(SSL *s)
1069 unsigned char *p,*d;
1071 unsigned long l,Time;
1073 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
1075 buf=(unsigned char *)s->init_buf->data;
1076 p=s->s3->server_random;
1077 Time=(unsigned long)time(NULL); /* Time */
1079 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
1081 /* Do the message type and length last */
1084 *(p++)=s->version>>8;
1085 *(p++)=s->version&0xff;
1088 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
1089 p+=SSL3_RANDOM_SIZE;
1091 /* now in theory we have 3 options to sending back the
1092 * session id. If it is a re-use, we send back the
1093 * old session-id, if it is a new session, we send
1094 * back the new session-id or we send back a 0 length
1095 * session-id if we want it to be single use.
1096 * Currently I will not implement the '0' length session-id
1097 * 12-Jan-98 - I'll now support the '0' length stuff.
1099 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
1100 s->session->session_id_length=0;
1102 sl=s->session->session_id_length;
1103 if (sl > (int)sizeof(s->session->session_id))
1105 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1109 memcpy(p,s->session->session_id,sl);
1112 /* put the cipher */
1113 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
1116 /* put the compression method */
1117 #ifdef OPENSSL_NO_COMP
1120 if (s->s3->tmp.new_compression == NULL)
1123 *(p++)=s->s3->tmp.new_compression->id;
1125 #ifndef OPENSSL_NO_TLSEXT
1126 if (ssl_prepare_serverhello_tlsext(s) <= 0)
1128 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1131 if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
1133 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
1141 *(d++)=SSL3_MT_SERVER_HELLO;
1144 s->state=SSL3_ST_CW_CLNT_HELLO_B;
1145 /* number of bytes to write */
1150 /* SSL3_ST_CW_CLNT_HELLO_B */
1151 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1154 int ssl3_send_server_done(SSL *s)
1158 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
1160 p=(unsigned char *)s->init_buf->data;
1163 *(p++)=SSL3_MT_SERVER_DONE;
1168 s->state=SSL3_ST_SW_SRVR_DONE_B;
1169 /* number of bytes to write */
1174 /* SSL3_ST_CW_CLNT_HELLO_B */
1175 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1178 int ssl3_send_server_key_exchange(SSL *s)
1180 #ifndef OPENSSL_NO_RSA
1184 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1187 #ifndef OPENSSL_NO_DH
1190 #ifndef OPENSSL_NO_ECDH
1191 EC_KEY *ecdh=NULL, *ecdhp;
1192 unsigned char *encodedPoint = NULL;
1195 BN_CTX *bn_ctx = NULL;
1198 unsigned char *p,*d;
1208 EVP_MD_CTX_init(&md_ctx);
1209 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1211 type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
1216 r[0]=r[1]=r[2]=r[3]=NULL;
1218 #ifndef OPENSSL_NO_RSA
1219 if (type & SSL_kRSA)
1222 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1224 rsa=s->cert->rsa_tmp_cb(s,
1225 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1226 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1229 al=SSL_AD_HANDSHAKE_FAILURE;
1230 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1238 al=SSL_AD_HANDSHAKE_FAILURE;
1239 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1244 s->s3->tmp.use_rsa_tmp=1;
1248 #ifndef OPENSSL_NO_DH
1249 if (type & SSL_kEDH)
1252 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1253 dhp=s->cert->dh_tmp_cb(s,
1254 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1255 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1258 al=SSL_AD_HANDSHAKE_FAILURE;
1259 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1263 if (s->s3->tmp.dh != NULL)
1266 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1270 if ((dh=DHparams_dup(dhp)) == NULL)
1272 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1277 if ((dhp->pub_key == NULL ||
1278 dhp->priv_key == NULL ||
1279 (s->options & SSL_OP_SINGLE_DH_USE)))
1281 if(!DH_generate_key(dh))
1283 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1290 dh->pub_key=BN_dup(dhp->pub_key);
1291 dh->priv_key=BN_dup(dhp->priv_key);
1292 if ((dh->pub_key == NULL) ||
1293 (dh->priv_key == NULL))
1295 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1305 #ifndef OPENSSL_NO_ECDH
1306 if (type & SSL_kEECDH)
1308 const EC_GROUP *group;
1310 ecdhp=cert->ecdh_tmp;
1311 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1313 ecdhp=s->cert->ecdh_tmp_cb(s,
1314 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1315 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1319 al=SSL_AD_HANDSHAKE_FAILURE;
1320 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1324 if (s->s3->tmp.ecdh != NULL)
1326 EC_KEY_free(s->s3->tmp.ecdh);
1327 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1331 /* Duplicate the ECDH structure. */
1334 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1337 if (!EC_KEY_up_ref(ecdhp))
1339 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1344 s->s3->tmp.ecdh=ecdh;
1345 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
1346 (EC_KEY_get0_private_key(ecdh) == NULL) ||
1347 (s->options & SSL_OP_SINGLE_ECDH_USE))
1349 if(!EC_KEY_generate_key(ecdh))
1351 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1356 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
1357 (EC_KEY_get0_public_key(ecdh) == NULL) ||
1358 (EC_KEY_get0_private_key(ecdh) == NULL))
1360 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1364 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1365 (EC_GROUP_get_degree(group) > 163))
1367 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1371 /* XXX: For now, we only support ephemeral ECDH
1372 * keys over named (not generic) curves. For
1373 * supported named curves, curve_id is non-zero.
1376 tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
1379 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1383 /* Encode the public key.
1384 * First check the size of encoding and
1385 * allocate memory accordingly.
1387 encodedlen = EC_POINT_point2oct(group,
1388 EC_KEY_get0_public_key(ecdh),
1389 POINT_CONVERSION_UNCOMPRESSED,
1392 encodedPoint = (unsigned char *)
1393 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1394 bn_ctx = BN_CTX_new();
1395 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1397 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1402 encodedlen = EC_POINT_point2oct(group,
1403 EC_KEY_get0_public_key(ecdh),
1404 POINT_CONVERSION_UNCOMPRESSED,
1405 encodedPoint, encodedlen, bn_ctx);
1407 if (encodedlen == 0)
1409 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1413 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1415 /* XXX: For now, we only support named (not
1416 * generic) curves in ECDH ephemeral key exchanges.
1417 * In this situation, we need four additional bytes
1418 * to encode the entire ServerECDHParams
1423 /* We'll generate the serverKeyExchange message
1424 * explicitly so we can set these to NULLs
1432 #endif /* !OPENSSL_NO_ECDH */
1433 #ifndef OPENSSL_NO_PSK
1434 if (type & SSL_kPSK)
1436 /* reserve size for record length and PSK identity hint*/
1437 n+=2+strlen(s->ctx->psk_identity_hint);
1440 #endif /* !OPENSSL_NO_PSK */
1442 al=SSL_AD_HANDSHAKE_FAILURE;
1443 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1446 for (i=0; r[i] != NULL; i++)
1448 nr[i]=BN_num_bytes(r[i]);
1452 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)
1453 && !(s->s3->tmp.new_cipher->algorithms & SSL_kPSK))
1455 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1458 al=SSL_AD_DECODE_ERROR;
1461 kn=EVP_PKEY_size(pkey);
1469 if (!BUF_MEM_grow_clean(buf,n+4+kn))
1471 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1474 d=(unsigned char *)s->init_buf->data;
1477 for (i=0; r[i] != NULL; i++)
1484 #ifndef OPENSSL_NO_ECDH
1485 if (type & SSL_kEECDH)
1487 /* XXX: For now, we only support named (not generic) curves.
1488 * In this situation, the serverKeyExchange message has:
1489 * [1 byte CurveType], [2 byte CurveName]
1490 * [1 byte length of encoded point], followed by
1491 * the actual encoded point itself
1493 *p = NAMED_CURVE_TYPE;
1501 memcpy((unsigned char*)p,
1502 (unsigned char *)encodedPoint,
1504 OPENSSL_free(encodedPoint);
1509 #ifndef OPENSSL_NO_PSK
1510 if (type & SSL_kPSK)
1512 /* copy PSK identity hint */
1513 s2n(strlen(s->ctx->psk_identity_hint), p);
1514 strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint));
1515 p+=strlen(s->ctx->psk_identity_hint);
1522 /* n is the length of the params, they start at &(d[4])
1523 * and p points to the space at the end. */
1524 #ifndef OPENSSL_NO_RSA
1525 if (pkey->type == EVP_PKEY_RSA)
1529 for (num=2; num > 0; num--)
1531 EVP_DigestInit_ex(&md_ctx,(num == 2)
1532 ?s->ctx->md5:s->ctx->sha1, NULL);
1533 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1534 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1535 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1536 EVP_DigestFinal_ex(&md_ctx,q,
1537 (unsigned int *)&i);
1541 if (RSA_sign(NID_md5_sha1, md_buf, j,
1542 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1544 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1552 #if !defined(OPENSSL_NO_DSA)
1553 if (pkey->type == EVP_PKEY_DSA)
1556 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1557 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1558 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1559 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1560 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1561 (unsigned int *)&i,pkey))
1563 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1571 #if !defined(OPENSSL_NO_ECDSA)
1572 if (pkey->type == EVP_PKEY_EC)
1574 /* let's do ECDSA */
1575 EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1576 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1577 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1578 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1579 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1580 (unsigned int *)&i,pkey))
1582 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
1591 /* Is this error check actually needed? */
1592 al=SSL_AD_HANDSHAKE_FAILURE;
1593 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1598 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1601 /* we should now have things packed up, so lets send
1607 s->state = SSL3_ST_SW_KEY_EXCH_B;
1608 EVP_MD_CTX_cleanup(&md_ctx);
1609 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1611 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1613 #ifndef OPENSSL_NO_ECDH
1614 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1615 BN_CTX_free(bn_ctx);
1617 EVP_MD_CTX_cleanup(&md_ctx);
1621 int ssl3_send_certificate_request(SSL *s)
1623 unsigned char *p,*d;
1625 STACK_OF(X509_NAME) *sk=NULL;
1629 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1633 d=p=(unsigned char *)&(buf->data[4]);
1635 /* get the list of acceptable cert types */
1637 n=ssl3_get_req_cert_type(s,p);
1646 sk=SSL_get_client_CA_list(s);
1650 for (i=0; i<sk_X509_NAME_num(sk); i++)
1652 name=sk_X509_NAME_value(sk,i);
1653 j=i2d_X509_NAME(name,NULL);
1654 if (!BUF_MEM_grow_clean(buf,4+n+j+2))
1656 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1659 p=(unsigned char *)&(buf->data[4+n]);
1660 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1663 i2d_X509_NAME(name,&p);
1670 i2d_X509_NAME(name,&p);
1671 j-=2; s2n(j,d); j+=2;
1677 /* else no CA names */
1678 p=(unsigned char *)&(buf->data[4+off]);
1681 d=(unsigned char *)buf->data;
1682 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1685 /* we should now have things packed up, so lets send
1690 #ifdef NETSCAPE_HANG_BUG
1691 p=(unsigned char *)s->init_buf->data + s->init_num;
1694 *(p++)=SSL3_MT_SERVER_DONE;
1701 s->state = SSL3_ST_SW_CERT_REQ_B;
1704 /* SSL3_ST_SW_CERT_REQ_B */
1705 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1710 int ssl3_get_client_key_exchange(SSL *s)
1716 #ifndef OPENSSL_NO_RSA
1718 EVP_PKEY *pkey=NULL;
1720 #ifndef OPENSSL_NO_DH
1724 #ifndef OPENSSL_NO_KRB5
1726 #endif /* OPENSSL_NO_KRB5 */
1728 #ifndef OPENSSL_NO_ECDH
1729 EC_KEY *srvr_ecdh = NULL;
1730 EVP_PKEY *clnt_pub_pkey = NULL;
1731 EC_POINT *clnt_ecpoint = NULL;
1732 BN_CTX *bn_ctx = NULL;
1735 n=s->method->ssl_get_message(s,
1736 SSL3_ST_SR_KEY_EXCH_A,
1737 SSL3_ST_SR_KEY_EXCH_B,
1738 SSL3_MT_CLIENT_KEY_EXCHANGE,
1742 if (!ok) return((int)n);
1743 p=(unsigned char *)s->init_msg;
1745 l=s->s3->tmp.new_cipher->algorithms;
1747 #ifndef OPENSSL_NO_RSA
1750 /* FIX THIS UP EAY EAY EAY EAY */
1751 if (s->s3->tmp.use_rsa_tmp)
1753 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1754 rsa=s->cert->rsa_tmp;
1755 /* Don't do a callback because rsa_tmp should
1756 * be sent already */
1759 al=SSL_AD_HANDSHAKE_FAILURE;
1760 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1767 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1768 if ( (pkey == NULL) ||
1769 (pkey->type != EVP_PKEY_RSA) ||
1770 (pkey->pkey.rsa == NULL))
1772 al=SSL_AD_HANDSHAKE_FAILURE;
1773 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1780 if (s->version > SSL3_VERSION)
1785 if (!(s->options & SSL_OP_TLS_D5_BUG))
1787 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1797 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1801 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1803 al=SSL_AD_DECODE_ERROR;
1804 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */
1807 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1809 /* The premaster secret must contain the same version number as the
1810 * ClientHello to detect version rollback attacks (strangely, the
1811 * protocol does not offer such protection for DH ciphersuites).
1812 * However, buggy clients exist that send the negotiated protocol
1813 * version instead if the server does not support the requested
1815 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1816 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1817 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1819 al=SSL_AD_DECODE_ERROR;
1820 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */
1822 /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack
1823 * (http://eprint.iacr.org/2003/052/) exploits the version
1824 * number check as a "bad version oracle" -- an alert would
1825 * reveal that the plaintext corresponding to some ciphertext
1826 * made up by the adversary is properly formatted except
1827 * that the version number is wrong. To avoid such attacks,
1828 * we should treat this just like any other decryption error. */
1834 /* Some decryption failure -- use random value instead as countermeasure
1835 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1836 * (see RFC 2246, section 7.4.7.1). */
1838 i = SSL_MAX_MASTER_KEY_LENGTH;
1839 p[0] = s->client_version >> 8;
1840 p[1] = s->client_version & 0xff;
1841 if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */
1845 s->session->master_key_length=
1846 s->method->ssl3_enc->generate_master_secret(s,
1847 s->session->master_key,
1849 OPENSSL_cleanse(p,i);
1853 #ifndef OPENSSL_NO_DH
1854 if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1859 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1861 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1871 if (n == 0L) /* the parameters are in the cert */
1873 al=SSL_AD_HANDSHAKE_FAILURE;
1874 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1879 if (s->s3->tmp.dh == NULL)
1881 al=SSL_AD_HANDSHAKE_FAILURE;
1882 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1886 dh_srvr=s->s3->tmp.dh;
1889 pub=BN_bin2bn(p,i,NULL);
1892 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1896 i=DH_compute_key(p,pub,dh_srvr);
1900 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1904 DH_free(s->s3->tmp.dh);
1909 s->session->master_key_length=
1910 s->method->ssl3_enc->generate_master_secret(s,
1911 s->session->master_key,p,i);
1912 OPENSSL_cleanse(p,i);
1916 #ifndef OPENSSL_NO_KRB5
1919 krb5_error_code krb5rc;
1920 krb5_data enc_ticket;
1921 krb5_data authenticator;
1923 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1924 EVP_CIPHER_CTX ciph_ctx;
1925 EVP_CIPHER *enc = NULL;
1926 unsigned char iv[EVP_MAX_IV_LENGTH];
1927 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
1928 + EVP_MAX_BLOCK_LENGTH];
1930 krb5_timestamp authtime = 0;
1931 krb5_ticket_times ttimes;
1933 EVP_CIPHER_CTX_init(&ciph_ctx);
1935 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1938 enc_ticket.length = i;
1940 if (n < enc_ticket.length + 6)
1942 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1943 SSL_R_DATA_LENGTH_TOO_LONG);
1947 enc_ticket.data = (char *)p;
1948 p+=enc_ticket.length;
1951 authenticator.length = i;
1953 if (n < enc_ticket.length + authenticator.length + 6)
1955 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1956 SSL_R_DATA_LENGTH_TOO_LONG);
1960 authenticator.data = (char *)p;
1961 p+=authenticator.length;
1965 enc_pms.data = (char *)p;
1968 /* Note that the length is checked again below,
1971 if(enc_pms.length > sizeof pms)
1973 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1974 SSL_R_DATA_LENGTH_TOO_LONG);
1978 if (n != (long)(enc_ticket.length + authenticator.length +
1979 enc_pms.length + 6))
1981 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1982 SSL_R_DATA_LENGTH_TOO_LONG);
1986 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
1990 printf("kssl_sget_tkt rtn %d [%d]\n",
1991 krb5rc, kssl_err.reason);
1993 printf("kssl_err text= %s\n", kssl_err.text);
1994 #endif /* KSSL_DEBUG */
1995 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2000 /* Note: no authenticator is not considered an error,
2001 ** but will return authtime == 0.
2003 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
2004 &authtime, &kssl_err)) != 0)
2007 printf("kssl_check_authent rtn %d [%d]\n",
2008 krb5rc, kssl_err.reason);
2010 printf("kssl_err text= %s\n", kssl_err.text);
2011 #endif /* KSSL_DEBUG */
2012 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2017 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
2019 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc);
2024 kssl_ctx_show(kssl_ctx);
2025 #endif /* KSSL_DEBUG */
2027 enc = kssl_map_enc(kssl_ctx->enctype);
2031 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2033 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
2035 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2036 SSL_R_DECRYPTION_FAILED);
2039 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
2040 (unsigned char *)enc_pms.data, enc_pms.length))
2042 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2043 SSL_R_DECRYPTION_FAILED);
2046 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2048 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2049 SSL_R_DATA_LENGTH_TOO_LONG);
2052 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
2054 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2055 SSL_R_DECRYPTION_FAILED);
2059 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2061 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2062 SSL_R_DATA_LENGTH_TOO_LONG);
2065 if (!((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
2067 /* The premaster secret must contain the same version number as the
2068 * ClientHello to detect version rollback attacks (strangely, the
2069 * protocol does not offer such protection for DH ciphersuites).
2070 * However, buggy clients exist that send random bytes instead of
2071 * the protocol version.
2072 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients.
2073 * (Perhaps we should have a separate BUG value for the Kerberos cipher)
2075 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
2076 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
2078 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2079 SSL_AD_DECODE_ERROR);
2084 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2086 s->session->master_key_length=
2087 s->method->ssl3_enc->generate_master_secret(s,
2088 s->session->master_key, pms, outl);
2090 if (kssl_ctx->client_princ)
2092 size_t len = strlen(kssl_ctx->client_princ);
2093 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
2095 s->session->krb5_client_princ_len = len;
2096 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
2101 /* Was doing kssl_ctx_free() here,
2102 ** but it caused problems for apache.
2103 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
2104 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
2108 #endif /* OPENSSL_NO_KRB5 */
2110 #ifndef OPENSSL_NO_ECDH
2111 if ((l & SSL_kECDH) || (l & SSL_kEECDH))
2116 const EC_GROUP *group;
2117 const BIGNUM *priv_key;
2119 /* initialize structures for server's ECDH key pair */
2120 if ((srvr_ecdh = EC_KEY_new()) == NULL)
2122 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2123 ERR_R_MALLOC_FAILURE);
2127 /* Let's get server private key and group information */
2130 /* use the certificate */
2131 tkey = s->cert->key->privatekey->pkey.ec;
2135 /* use the ephermeral values we saved when
2136 * generating the ServerKeyExchange msg.
2138 tkey = s->s3->tmp.ecdh;
2141 group = EC_KEY_get0_group(tkey);
2142 priv_key = EC_KEY_get0_private_key(tkey);
2144 if (!EC_KEY_set_group(srvr_ecdh, group) ||
2145 !EC_KEY_set_private_key(srvr_ecdh, priv_key))
2147 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2152 /* Let's get client's public key */
2153 if ((clnt_ecpoint = EC_POINT_new(group)) == NULL)
2155 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2156 ERR_R_MALLOC_FAILURE);
2162 /* Client Publickey was in Client Certificate */
2166 al=SSL_AD_HANDSHAKE_FAILURE;
2167 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
2170 if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer))
2172 (clnt_pub_pkey->type != EVP_PKEY_EC))
2174 /* XXX: For now, we do not support client
2175 * authentication using ECDH certificates
2176 * so this branch (n == 0L) of the code is
2177 * never executed. When that support is
2178 * added, we ought to ensure the key
2179 * received in the certificate is
2180 * authorized for key agreement.
2181 * ECDH_compute_key implicitly checks that
2182 * the two ECDH shares are for the same
2185 al=SSL_AD_HANDSHAKE_FAILURE;
2186 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2187 SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
2191 if (EC_POINT_copy(clnt_ecpoint,
2192 EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0)
2194 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2198 ret = 2; /* Skip certificate verify processing */
2202 /* Get client's public key from encoded point
2203 * in the ClientKeyExchange message.
2205 if ((bn_ctx = BN_CTX_new()) == NULL)
2207 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2208 ERR_R_MALLOC_FAILURE);
2212 /* Get encoded point length */
2215 if (EC_POINT_oct2point(group,
2216 clnt_ecpoint, p, i, bn_ctx) == 0)
2218 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2222 /* p is pointing to somewhere in the buffer
2223 * currently, so set it to the start
2225 p=(unsigned char *)s->init_buf->data;
2228 /* Compute the shared pre-master secret */
2229 field_size = EC_GROUP_get_degree(group);
2230 if (field_size <= 0)
2232 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2236 i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL);
2239 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2244 EVP_PKEY_free(clnt_pub_pkey);
2245 EC_POINT_free(clnt_ecpoint);
2246 if (srvr_ecdh != NULL)
2247 EC_KEY_free(srvr_ecdh);
2248 BN_CTX_free(bn_ctx);
2250 /* Compute the master secret */
2251 s->session->master_key_length = s->method->ssl3_enc-> \
2252 generate_master_secret(s, s->session->master_key, p, i);
2254 OPENSSL_cleanse(p, i);
2259 #ifndef OPENSSL_NO_PSK
2262 unsigned char *t = NULL;
2263 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2264 unsigned int pre_ms_len = 0, psk_len = 0;
2266 char tmp_id[PSK_MAX_IDENTITY_LEN+1];
2268 al=SSL_AD_HANDSHAKE_FAILURE;
2273 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2274 SSL_R_LENGTH_MISMATCH);
2277 if (i > PSK_MAX_IDENTITY_LEN)
2279 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2280 SSL_R_DATA_LENGTH_TOO_LONG);
2283 if (s->psk_server_callback == NULL)
2285 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2286 SSL_R_PSK_NO_SERVER_CB);
2290 /* Create guaranteed NULL-terminated identity
2291 * string for the callback */
2292 memcpy(tmp_id, p, i);
2293 memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
2294 psk_len = s->psk_server_callback(s, tmp_id,
2295 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2296 OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1);
2298 if (psk_len > PSK_MAX_PSK_LEN)
2300 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2301 ERR_R_INTERNAL_ERROR);
2304 else if (psk_len == 0)
2306 /* PSK related to the given identity not found */
2307 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2308 SSL_R_PSK_IDENTITY_NOT_FOUND);
2309 al=SSL_AD_UNKNOWN_PSK_IDENTITY;
2313 /* create PSK pre_master_secret */
2314 pre_ms_len=2+psk_len+2+psk_len;
2316 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2318 memset(t, 0, psk_len);
2322 if (s->session->psk_identity != NULL)
2323 OPENSSL_free(s->session->psk_identity);
2324 s->session->psk_identity = BUF_strdup((char *)p);
2325 if (s->session->psk_identity == NULL)
2327 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2328 ERR_R_MALLOC_FAILURE);
2332 if (s->session->psk_identity_hint != NULL)
2333 OPENSSL_free(s->session->psk_identity_hint);
2334 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2335 if (s->ctx->psk_identity_hint != NULL &&
2336 s->session->psk_identity_hint == NULL)
2338 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2339 ERR_R_MALLOC_FAILURE);
2343 s->session->master_key_length=
2344 s->method->ssl3_enc->generate_master_secret(s,
2345 s->session->master_key, psk_or_pre_ms, pre_ms_len);
2348 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2355 al=SSL_AD_HANDSHAKE_FAILURE;
2356 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2357 SSL_R_UNKNOWN_CIPHER_TYPE);
2363 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2364 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH)
2367 #ifndef OPENSSL_NO_ECDH
2368 EVP_PKEY_free(clnt_pub_pkey);
2369 EC_POINT_free(clnt_ecpoint);
2370 if (srvr_ecdh != NULL)
2371 EC_KEY_free(srvr_ecdh);
2372 BN_CTX_free(bn_ctx);
2377 int ssl3_get_cert_verify(SSL *s)
2379 EVP_PKEY *pkey=NULL;
2386 n=s->method->ssl_get_message(s,
2387 SSL3_ST_SR_CERT_VRFY_A,
2388 SSL3_ST_SR_CERT_VRFY_B,
2393 if (!ok) return((int)n);
2395 if (s->session->peer != NULL)
2397 peer=s->session->peer;
2398 pkey=X509_get_pubkey(peer);
2399 type=X509_certificate_type(peer,pkey);
2407 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
2409 s->s3->tmp.reuse_message=1;
2410 if ((peer != NULL) && (type | EVP_PKT_SIGN))
2412 al=SSL_AD_UNEXPECTED_MESSAGE;
2413 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
2422 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
2423 al=SSL_AD_UNEXPECTED_MESSAGE;
2427 if (!(type & EVP_PKT_SIGN))
2429 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
2430 al=SSL_AD_ILLEGAL_PARAMETER;
2434 if (s->s3->change_cipher_spec)
2436 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
2437 al=SSL_AD_UNEXPECTED_MESSAGE;
2441 /* we now have a signature that we need to verify */
2442 p=(unsigned char *)s->init_msg;
2447 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
2448 al=SSL_AD_DECODE_ERROR;
2452 j=EVP_PKEY_size(pkey);
2453 if ((i > j) || (n > j) || (n <= 0))
2455 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
2456 al=SSL_AD_DECODE_ERROR;
2460 #ifndef OPENSSL_NO_RSA
2461 if (pkey->type == EVP_PKEY_RSA)
2463 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
2464 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
2468 al=SSL_AD_DECRYPT_ERROR;
2469 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
2474 al=SSL_AD_DECRYPT_ERROR;
2475 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
2481 #ifndef OPENSSL_NO_DSA
2482 if (pkey->type == EVP_PKEY_DSA)
2484 j=DSA_verify(pkey->save_type,
2485 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2486 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
2490 al=SSL_AD_DECRYPT_ERROR;
2491 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
2497 #ifndef OPENSSL_NO_ECDSA
2498 if (pkey->type == EVP_PKEY_EC)
2500 j=ECDSA_verify(pkey->save_type,
2501 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2502 SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec);
2506 al=SSL_AD_DECRYPT_ERROR;
2507 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
2508 SSL_R_BAD_ECDSA_SIGNATURE);
2515 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
2516 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
2525 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2528 EVP_PKEY_free(pkey);
2532 int ssl3_get_client_certificate(SSL *s)
2534 int i,ok,al,ret= -1;
2536 unsigned long l,nc,llen,n;
2537 const unsigned char *p,*q;
2539 STACK_OF(X509) *sk=NULL;
2541 n=s->method->ssl_get_message(s,
2548 if (!ok) return((int)n);
2550 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
2552 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
2553 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2555 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2556 al=SSL_AD_HANDSHAKE_FAILURE;
2559 /* If tls asked for a client cert, the client must return a 0 list */
2560 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
2562 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
2563 al=SSL_AD_UNEXPECTED_MESSAGE;
2566 s->s3->tmp.reuse_message=1;
2570 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
2572 al=SSL_AD_UNEXPECTED_MESSAGE;
2573 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
2576 p=d=(unsigned char *)s->init_msg;
2578 if ((sk=sk_X509_new_null()) == NULL)
2580 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2587 al=SSL_AD_DECODE_ERROR;
2588 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
2591 for (nc=0; nc<llen; )
2594 if ((l+nc+3) > llen)
2596 al=SSL_AD_DECODE_ERROR;
2597 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2602 x=d2i_X509(NULL,&p,l);
2605 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
2610 al=SSL_AD_DECODE_ERROR;
2611 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2614 if (!sk_X509_push(sk,x))
2616 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2623 if (sk_X509_num(sk) <= 0)
2625 /* TLS does not mind 0 certs returned */
2626 if (s->version == SSL3_VERSION)
2628 al=SSL_AD_HANDSHAKE_FAILURE;
2629 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
2632 /* Fail for TLS only if we required a certificate */
2633 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
2634 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2636 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2637 al=SSL_AD_HANDSHAKE_FAILURE;
2643 i=ssl_verify_cert_chain(s,sk);
2646 al=ssl_verify_alarm_type(s->verify_result);
2647 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
2652 if (s->session->peer != NULL) /* This should not be needed */
2653 X509_free(s->session->peer);
2654 s->session->peer=sk_X509_shift(sk);
2655 s->session->verify_result = s->verify_result;
2657 /* With the current implementation, sess_cert will always be NULL
2658 * when we arrive here. */
2659 if (s->session->sess_cert == NULL)
2661 s->session->sess_cert = ssl_sess_cert_new();
2662 if (s->session->sess_cert == NULL)
2664 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
2668 if (s->session->sess_cert->cert_chain != NULL)
2669 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
2670 s->session->sess_cert->cert_chain=sk;
2671 /* Inconsistency alert: cert_chain does *not* include the
2672 * peer's own certificate, while we do include it in s3_clnt.c */
2680 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2683 if (x != NULL) X509_free(x);
2684 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
2688 int ssl3_send_server_certificate(SSL *s)
2693 if (s->state == SSL3_ST_SW_CERT_A)
2695 x=ssl_get_server_send_cert(s);
2697 /* VRS: allow null cert if auth == KRB5 */
2698 (s->s3->tmp.new_cipher->algorithms
2699 & (SSL_MKEY_MASK|SSL_AUTH_MASK))
2700 != (SSL_aKRB5|SSL_kKRB5))
2702 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
2706 l=ssl3_output_cert_chain(s,x);
2707 s->state=SSL3_ST_SW_CERT_B;
2712 /* SSL3_ST_SW_CERT_B */
2713 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));