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) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
114 * Portions of the attached software ("Contribution") are developed by
115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
117 * The Contribution is licensed pursuant to the OpenSSL open source
118 * license provided above.
120 * ECC cipher suite support in OpenSSL originally written by
121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
124 /* ====================================================================
125 * Copyright 2005 Nokia. All rights reserved.
127 * The portions of the attached software ("Contribution") is developed by
128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 * support (see RFC 4279) to OpenSSL.
135 * No patent licenses or other rights except those expressly stated in
136 * the OpenSSL open source license shall be deemed granted or received
137 * expressly, by implication, estoppel, or otherwise.
139 * No assurances are provided by Nokia that the Contribution does not
140 * infringe the patent or other intellectual property rights of any third
141 * party or that the license provides you with all the necessary rights
142 * to make use of the Contribution.
144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
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/hmac.h>
162 #include <openssl/x509.h>
163 #ifndef OPENSSL_NO_DH
164 #include <openssl/dh.h>
166 #include <openssl/bn.h>
167 #ifndef OPENSSL_NO_KRB5
168 #include <openssl/krb5_asn.h>
170 #include <openssl/md5.h>
172 static const SSL_METHOD *ssl3_get_server_method(int ver);
174 static const SSL_METHOD *ssl3_get_server_method(int ver)
176 if (ver == SSL3_VERSION)
177 return(SSLv3_server_method());
182 IMPLEMENT_ssl3_meth_func(SSLv3_server_method,
184 ssl_undefined_function,
185 ssl3_get_server_method)
187 int ssl3_accept(SSL *s)
190 unsigned long alg_k,Time=(unsigned long)time(NULL);
191 void (*cb)(const SSL *ssl,int type,int val)=NULL;
194 int new_state,state,skip=0;
196 RAND_add(&Time,sizeof(Time),0);
200 if (s->info_callback != NULL)
202 else if (s->ctx->info_callback != NULL)
203 cb=s->ctx->info_callback;
205 /* init things to blank */
207 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
211 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
221 case SSL_ST_RENEGOTIATE:
223 /* s->state=SSL_ST_ACCEPT; */
227 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
228 case SSL_ST_OK|SSL_ST_ACCEPT:
231 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
233 if ((s->version>>8) != 3)
235 SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
238 s->type=SSL_ST_ACCEPT;
240 if (s->init_buf == NULL)
242 if ((buf=BUF_MEM_new()) == NULL)
247 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255 if (!ssl3_setup_buffers(s))
263 if (s->state != SSL_ST_RENEGOTIATE)
265 /* Ok, we now need to push on a buffering BIO so that
266 * the output is sent in a way that TCP likes :-)
268 if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
270 ssl3_init_finished_mac(s);
271 s->state=SSL3_ST_SR_CLNT_HELLO_A;
272 s->ctx->stats.sess_accept++;
276 /* s->state == SSL_ST_RENEGOTIATE,
277 * we will just send a HelloRequest */
278 s->ctx->stats.sess_accept_renegotiate++;
279 s->state=SSL3_ST_SW_HELLO_REQ_A;
283 case SSL3_ST_SW_HELLO_REQ_A:
284 case SSL3_ST_SW_HELLO_REQ_B:
287 ret=ssl3_send_hello_request(s);
288 if (ret <= 0) goto end;
289 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
290 s->state=SSL3_ST_SW_FLUSH;
293 ssl3_init_finished_mac(s);
296 case SSL3_ST_SW_HELLO_REQ_C:
300 case SSL3_ST_SR_CLNT_HELLO_A:
301 case SSL3_ST_SR_CLNT_HELLO_B:
302 case SSL3_ST_SR_CLNT_HELLO_C:
305 ret=ssl3_get_client_hello(s);
306 if (ret <= 0) goto end;
309 s->state=SSL3_ST_SW_SRVR_HELLO_A;
313 case SSL3_ST_SW_SRVR_HELLO_A:
314 case SSL3_ST_SW_SRVR_HELLO_B:
315 ret=ssl3_send_server_hello(s);
316 if (ret <= 0) goto end;
319 s->state=SSL3_ST_SW_CHANGE_A;
321 s->state=SSL3_ST_SW_CERT_A;
325 case SSL3_ST_SW_CERT_A:
326 case SSL3_ST_SW_CERT_B:
327 /* Check if it is anon DH or anon ECDH, */
328 /* normal PSK or KRB5 */
329 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
330 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
331 && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
333 ret=ssl3_send_server_certificate(s);
334 if (ret <= 0) goto end;
338 s->state=SSL3_ST_SW_KEY_EXCH_A;
342 case SSL3_ST_SW_KEY_EXCH_A:
343 case SSL3_ST_SW_KEY_EXCH_B:
344 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
346 /* clear this, it may get reset by
347 * send_server_key_exchange */
348 if ((s->options & SSL_OP_EPHEMERAL_RSA)
349 #ifndef OPENSSL_NO_KRB5
350 && !(alg_k & SSL_kKRB5)
351 #endif /* OPENSSL_NO_KRB5 */
353 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
354 * even when forbidden by protocol specs
355 * (handshake may fail as clients are not required to
356 * be able to handle this) */
357 s->s3->tmp.use_rsa_tmp=1;
359 s->s3->tmp.use_rsa_tmp=0;
362 /* only send if a DH key exchange, fortezza or
363 * RSA but we have a sign only certificate
365 * PSK: may send PSK identity hints
367 * For ECC ciphersuites, we send a serverKeyExchange
368 * message only if the cipher suite is either
369 * ECDH-anon or ECDHE. In other cases, the
370 * server certificate contains the server's
371 * public key for key exchange.
373 if (s->s3->tmp.use_rsa_tmp
374 /* PSK: send ServerKeyExchange if PSK identity
375 * hint if provided */
376 #ifndef OPENSSL_NO_PSK
377 || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint)
379 || (alg_k & (SSL_kDHr|SSL_kDHd|SSL_kEDH))
380 || (alg_k & SSL_kEECDH)
381 || ((alg_k & SSL_kRSA)
382 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
383 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
384 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
390 ret=ssl3_send_server_key_exchange(s);
391 if (ret <= 0) goto end;
396 s->state=SSL3_ST_SW_CERT_REQ_A;
400 case SSL3_ST_SW_CERT_REQ_A:
401 case SSL3_ST_SW_CERT_REQ_B:
402 if (/* don't request cert unless asked for it: */
403 !(s->verify_mode & SSL_VERIFY_PEER) ||
404 /* if SSL_VERIFY_CLIENT_ONCE is set,
405 * don't request cert during re-negotiation: */
406 ((s->session->peer != NULL) &&
407 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
408 /* never request cert in anonymous ciphersuites
409 * (see section "Certificate request" in SSL 3 drafts
410 * and in RFC 2246): */
411 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
412 /* ... except when the application insists on verification
413 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
414 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
415 /* never request cert in Kerberos ciphersuites */
416 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)
417 /* With normal PSK Certificates and
418 * Certificate Requests are omitted */
419 || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
421 /* no cert request */
423 s->s3->tmp.cert_request=0;
424 s->state=SSL3_ST_SW_SRVR_DONE_A;
428 s->s3->tmp.cert_request=1;
429 ret=ssl3_send_certificate_request(s);
430 if (ret <= 0) goto end;
431 #ifndef NETSCAPE_HANG_BUG
432 s->state=SSL3_ST_SW_SRVR_DONE_A;
434 s->state=SSL3_ST_SW_FLUSH;
435 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
441 case SSL3_ST_SW_SRVR_DONE_A:
442 case SSL3_ST_SW_SRVR_DONE_B:
443 ret=ssl3_send_server_done(s);
444 if (ret <= 0) goto end;
445 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
446 s->state=SSL3_ST_SW_FLUSH;
450 case SSL3_ST_SW_FLUSH:
451 /* number of bytes to be flushed */
452 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
455 s->rwstate=SSL_WRITING;
456 num1=BIO_flush(s->wbio);
457 if (num1 <= 0) { ret= -1; goto end; }
458 s->rwstate=SSL_NOTHING;
461 s->state=s->s3->tmp.next_state;
464 case SSL3_ST_SR_CERT_A:
465 case SSL3_ST_SR_CERT_B:
466 /* Check for second client hello (MS SGC) */
467 ret = ssl3_check_client_hello(s);
471 s->state = SSL3_ST_SR_CLNT_HELLO_C;
473 if (s->s3->tmp.cert_request)
475 ret=ssl3_get_client_certificate(s);
476 if (ret <= 0) goto end;
479 s->state=SSL3_ST_SR_KEY_EXCH_A;
483 case SSL3_ST_SR_KEY_EXCH_A:
484 case SSL3_ST_SR_KEY_EXCH_B:
485 ret=ssl3_get_client_key_exchange(s);
490 /* For the ECDH ciphersuites when
491 * the client sends its ECDH pub key in
492 * a certificate, the CertificateVerify
493 * message is not sent.
495 s->state=SSL3_ST_SR_FINISHED_A;
500 s->state=SSL3_ST_SR_CERT_VRFY_A;
503 /* We need to get hashes here so if there is
504 * a client cert, it can be verified
506 s->method->ssl3_enc->cert_verify_mac(s,
507 &(s->s3->finish_dgst1),
508 &(s->s3->tmp.cert_verify_md[0]));
509 s->method->ssl3_enc->cert_verify_mac(s,
510 &(s->s3->finish_dgst2),
511 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]));
515 case SSL3_ST_SR_CERT_VRFY_A:
516 case SSL3_ST_SR_CERT_VRFY_B:
518 /* we should decide if we expected this one */
519 ret=ssl3_get_cert_verify(s);
520 if (ret <= 0) goto end;
522 s->state=SSL3_ST_SR_FINISHED_A;
526 case SSL3_ST_SR_FINISHED_A:
527 case SSL3_ST_SR_FINISHED_B:
528 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
529 SSL3_ST_SR_FINISHED_B);
530 if (ret <= 0) goto end;
533 #ifndef OPENSSL_NO_TLSEXT
534 else if (s->tlsext_ticket_expected)
535 s->state=SSL3_ST_SW_SESSION_TICKET_A;
538 s->state=SSL3_ST_SW_CHANGE_A;
542 #ifndef OPENSSL_NO_TLSEXT
543 case SSL3_ST_SW_SESSION_TICKET_A:
544 case SSL3_ST_SW_SESSION_TICKET_B:
545 ret=ssl3_send_newsession_ticket(s);
546 if (ret <= 0) goto end;
547 s->state=SSL3_ST_SW_CHANGE_A;
553 case SSL3_ST_SW_CHANGE_A:
554 case SSL3_ST_SW_CHANGE_B:
556 s->session->cipher=s->s3->tmp.new_cipher;
557 if (!s->method->ssl3_enc->setup_key_block(s))
558 { ret= -1; goto end; }
560 ret=ssl3_send_change_cipher_spec(s,
561 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
563 if (ret <= 0) goto end;
564 s->state=SSL3_ST_SW_FINISHED_A;
567 if (!s->method->ssl3_enc->change_cipher_state(s,
568 SSL3_CHANGE_CIPHER_SERVER_WRITE))
576 case SSL3_ST_SW_FINISHED_A:
577 case SSL3_ST_SW_FINISHED_B:
578 ret=ssl3_send_finished(s,
579 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
580 s->method->ssl3_enc->server_finished_label,
581 s->method->ssl3_enc->server_finished_label_len);
582 if (ret <= 0) goto end;
583 s->state=SSL3_ST_SW_FLUSH;
585 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
587 s->s3->tmp.next_state=SSL_ST_OK;
592 /* clean a few things up */
593 ssl3_cleanup_key_block(s);
595 BUF_MEM_free(s->init_buf);
598 /* remove buffering on output */
599 ssl_free_wbio_buffer(s);
603 if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
605 /* actually not necessarily a 'new' session unless
606 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
610 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
612 s->ctx->stats.sess_accept_good++;
614 s->handshake_func=ssl3_accept;
616 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
624 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
630 if (!s->s3->tmp.reuse_message && !skip)
634 if ((ret=BIO_flush(s->wbio)) <= 0)
639 if ((cb != NULL) && (s->state != state))
643 cb(s,SSL_CB_ACCEPT_LOOP,1);
650 /* BIO_flush(s->wbio); */
654 cb(s,SSL_CB_ACCEPT_EXIT,ret);
658 int ssl3_send_hello_request(SSL *s)
662 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
664 p=(unsigned char *)s->init_buf->data;
665 *(p++)=SSL3_MT_HELLO_REQUEST;
670 s->state=SSL3_ST_SW_HELLO_REQ_B;
671 /* number of bytes to write */
676 /* SSL3_ST_SW_HELLO_REQ_B */
677 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
680 int ssl3_check_client_hello(SSL *s)
685 /* this function is called when we really expect a Certificate message,
686 * so permit appropriate message length */
687 n=s->method->ssl_get_message(s,
693 if (!ok) return((int)n);
694 s->s3->tmp.reuse_message = 1;
695 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
697 /* Throw away what we have done so far in the current handshake,
698 * which will now be aborted. (A full SSL_clear would be too much.)
699 * I hope that tmp.dh is the only thing that may need to be cleared
700 * when a handshake is not completed ... */
701 #ifndef OPENSSL_NO_DH
702 if (s->s3->tmp.dh != NULL)
704 DH_free(s->s3->tmp.dh);
705 s->s3->tmp.dh = NULL;
713 int ssl3_get_client_hello(SSL *s)
715 int i,j,ok,al,ret= -1;
716 unsigned int cookie_len;
719 unsigned char *p,*d,*q;
721 #ifndef OPENSSL_NO_COMP
724 STACK_OF(SSL_CIPHER) *ciphers=NULL;
726 /* We do this so that we will respond with our native type.
727 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
728 * This down switching should be handled by a different method.
729 * If we are SSLv3, we will respond with SSLv3, even if prompted with
732 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
734 s->state=SSL3_ST_SR_CLNT_HELLO_B;
737 n=s->method->ssl_get_message(s,
738 SSL3_ST_SR_CLNT_HELLO_B,
739 SSL3_ST_SR_CLNT_HELLO_C,
740 SSL3_MT_CLIENT_HELLO,
741 SSL3_RT_MAX_PLAIN_LENGTH,
744 if (!ok) return((int)n);
746 d=p=(unsigned char *)s->init_msg;
748 /* use version from inside client hello, not from record header
749 * (may differ: see RFC 2246, Appendix E, second paragraph) */
750 s->client_version=(((int)p[0])<<8)|(int)p[1];
753 if (s->client_version < s->version)
755 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
756 if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
758 /* similar to ssl3_get_record, send alert using remote version number */
759 s->version = s->client_version;
761 al = SSL_AD_PROTOCOL_VERSION;
765 /* load the client random */
766 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
769 /* get the session-id */
773 /* Versions before 0.9.7 always allow session reuse during renegotiation
774 * (i.e. when s->new_session is true), option
775 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7.
776 * Maybe this optional behaviour should always have been the default,
777 * but we cannot safely change the default behaviour (or new applications
778 * might be written that become totally unsecure when compiled with
779 * an earlier library version)
781 if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
783 if (!ssl_get_new_session(s,1))
788 i=ssl_get_prev_session(s, p, j, d + n);
790 { /* previous session */
797 if (!ssl_get_new_session(s,1))
804 if (SSL_version(s) == DTLS1_VERSION)
809 if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
810 s->d1->send_cookie == 0)
812 /* HelloVerifyMessage has already been sent */
813 if ( cookie_len != s->d1->cookie_len)
815 al = SSL_AD_HANDSHAKE_FAILURE;
816 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
822 * The ClientHello may contain a cookie even if the
823 * HelloVerify message has not been sent--make sure that it
824 * does not cause an overflow.
826 if ( cookie_len > sizeof(s->d1->rcvd_cookie))
829 al = SSL_AD_DECODE_ERROR;
830 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
834 /* verify the cookie if appropriate option is set. */
835 if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
838 memcpy(s->d1->rcvd_cookie, p, cookie_len);
840 if ( s->ctx->app_verify_cookie_cb != NULL)
842 if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie,
845 al=SSL_AD_HANDSHAKE_FAILURE;
846 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
847 SSL_R_COOKIE_MISMATCH);
850 /* else cookie verification succeeded */
852 else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie,
853 s->d1->cookie_len) != 0) /* default verification */
855 al=SSL_AD_HANDSHAKE_FAILURE;
856 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
857 SSL_R_COOKIE_MISMATCH);
866 if ((i == 0) && (j != 0))
868 /* we need a cipher if we are not resuming a session */
869 al=SSL_AD_ILLEGAL_PARAMETER;
870 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
875 /* not enough data */
876 al=SSL_AD_DECODE_ERROR;
877 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
880 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
887 /* If it is a hit, check that the cipher is in the list */
888 if ((s->hit) && (i > 0))
891 id=s->session->cipher->id;
894 printf("client sent %d ciphers\n",sk_num(ciphers));
896 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
898 c=sk_SSL_CIPHER_value(ciphers,i);
900 printf("client [%2d of %2d]:%s\n",
901 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
911 if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
913 /* Very bad for multi-threading.... */
914 s->session->cipher=sk_SSL_CIPHER_value(ciphers, 0);
918 /* we need to have the cipher in the cipher
919 * list if we are asked to reuse it */
920 al=SSL_AD_ILLEGAL_PARAMETER;
921 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
931 /* not enough data */
932 al=SSL_AD_DECODE_ERROR;
933 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
939 if (p[j] == 0) break;
946 al=SSL_AD_DECODE_ERROR;
947 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
951 #ifndef OPENSSL_NO_TLSEXT
953 if (s->version > SSL3_VERSION)
955 if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al))
957 /* 'al' set by ssl_parse_clienthello_tlsext */
958 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT);
962 if (ssl_check_clienthello_tlsext(s) <= 0) {
963 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
968 /* Worst case, we will use the NULL compression, but if we have other
969 * options, we will now look for them. We have i-1 compression
970 * algorithms from the client, starting at q. */
971 s->s3->tmp.new_compression=NULL;
972 #ifndef OPENSSL_NO_COMP
973 if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods)
974 { /* See if we have a match */
977 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
980 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
993 s->s3->tmp.new_compression=comp;
999 /* Given s->session->ciphers and SSL_get_ciphers, we must
1004 #ifdef OPENSSL_NO_COMP
1005 s->session->compress_meth=0;
1007 s->session->compress_meth=(comp == NULL)?0:comp->id;
1009 if (s->session->ciphers != NULL)
1010 sk_SSL_CIPHER_free(s->session->ciphers);
1011 s->session->ciphers=ciphers;
1012 if (ciphers == NULL)
1014 al=SSL_AD_ILLEGAL_PARAMETER;
1015 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
1019 c=ssl3_choose_cipher(s,s->session->ciphers,
1020 SSL_get_ciphers(s));
1024 al=SSL_AD_HANDSHAKE_FAILURE;
1025 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
1028 s->s3->tmp.new_cipher=c;
1032 /* Session-id reuse */
1033 #ifdef REUSE_CIPHER_BUG
1034 STACK_OF(SSL_CIPHER) *sk;
1035 SSL_CIPHER *nc=NULL;
1036 SSL_CIPHER *ec=NULL;
1038 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
1040 sk=s->session->ciphers;
1041 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1043 c=sk_SSL_CIPHER_value(sk,i);
1044 if (c->algorithm_enc & SSL_eNULL)
1046 if (SSL_C_IS_EXPORT(c))
1050 s->s3->tmp.new_cipher=nc;
1051 else if (ec != NULL)
1052 s->s3->tmp.new_cipher=ec;
1054 s->s3->tmp.new_cipher=s->session->cipher;
1058 s->s3->tmp.new_cipher=s->session->cipher;
1061 /* we now have the following setup.
1063 * cipher_list - our prefered list of ciphers
1064 * ciphers - the clients prefered list of ciphers
1065 * compression - basically ignored right now
1066 * ssl version is set - sslv3
1067 * s->session - The ssl session has been setup.
1068 * s->hit - session reuse flag
1069 * s->tmp.new_cipher - the new cipher to use.
1076 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1079 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
1083 int ssl3_send_server_hello(SSL *s)
1086 unsigned char *p,*d;
1088 unsigned long l,Time;
1090 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
1092 buf=(unsigned char *)s->init_buf->data;
1093 p=s->s3->server_random;
1094 Time=(unsigned long)time(NULL); /* Time */
1096 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
1098 /* Do the message type and length last */
1101 *(p++)=s->version>>8;
1102 *(p++)=s->version&0xff;
1105 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
1106 p+=SSL3_RANDOM_SIZE;
1108 /* now in theory we have 3 options to sending back the
1109 * session id. If it is a re-use, we send back the
1110 * old session-id, if it is a new session, we send
1111 * back the new session-id or we send back a 0 length
1112 * session-id if we want it to be single use.
1113 * Currently I will not implement the '0' length session-id
1114 * 12-Jan-98 - I'll now support the '0' length stuff.
1116 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER))
1117 s->session->session_id_length=0;
1119 sl=s->session->session_id_length;
1120 if (sl > (int)sizeof(s->session->session_id))
1122 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1126 memcpy(p,s->session->session_id,sl);
1129 /* put the cipher */
1130 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
1133 /* put the compression method */
1134 #ifdef OPENSSL_NO_COMP
1137 if (s->s3->tmp.new_compression == NULL)
1140 *(p++)=s->s3->tmp.new_compression->id;
1142 #ifndef OPENSSL_NO_TLSEXT
1143 if (ssl_prepare_serverhello_tlsext(s) <= 0)
1145 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1148 if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
1150 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
1158 *(d++)=SSL3_MT_SERVER_HELLO;
1161 s->state=SSL3_ST_CW_CLNT_HELLO_B;
1162 /* number of bytes to write */
1167 /* SSL3_ST_CW_CLNT_HELLO_B */
1168 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1171 int ssl3_send_server_done(SSL *s)
1175 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
1177 p=(unsigned char *)s->init_buf->data;
1180 *(p++)=SSL3_MT_SERVER_DONE;
1185 s->state=SSL3_ST_SW_SRVR_DONE_B;
1186 /* number of bytes to write */
1191 /* SSL3_ST_CW_CLNT_HELLO_B */
1192 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1195 int ssl3_send_server_key_exchange(SSL *s)
1197 #ifndef OPENSSL_NO_RSA
1201 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1204 #ifndef OPENSSL_NO_DH
1207 #ifndef OPENSSL_NO_ECDH
1208 EC_KEY *ecdh=NULL, *ecdhp;
1209 unsigned char *encodedPoint = NULL;
1212 BN_CTX *bn_ctx = NULL;
1215 unsigned char *p,*d;
1225 EVP_MD_CTX_init(&md_ctx);
1226 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1228 type=s->s3->tmp.new_cipher->algorithm_mkey;
1233 r[0]=r[1]=r[2]=r[3]=NULL;
1235 #ifndef OPENSSL_NO_RSA
1236 if (type & SSL_kRSA)
1239 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1241 rsa=s->cert->rsa_tmp_cb(s,
1242 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1243 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1246 al=SSL_AD_HANDSHAKE_FAILURE;
1247 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1255 al=SSL_AD_HANDSHAKE_FAILURE;
1256 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1261 s->s3->tmp.use_rsa_tmp=1;
1265 #ifndef OPENSSL_NO_DH
1266 if (type & SSL_kEDH)
1269 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1270 dhp=s->cert->dh_tmp_cb(s,
1271 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1272 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1275 al=SSL_AD_HANDSHAKE_FAILURE;
1276 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1280 if (s->s3->tmp.dh != NULL)
1283 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1287 if ((dh=DHparams_dup(dhp)) == NULL)
1289 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1294 if ((dhp->pub_key == NULL ||
1295 dhp->priv_key == NULL ||
1296 (s->options & SSL_OP_SINGLE_DH_USE)))
1298 if(!DH_generate_key(dh))
1300 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1307 dh->pub_key=BN_dup(dhp->pub_key);
1308 dh->priv_key=BN_dup(dhp->priv_key);
1309 if ((dh->pub_key == NULL) ||
1310 (dh->priv_key == NULL))
1312 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1322 #ifndef OPENSSL_NO_ECDH
1323 if (type & SSL_kEECDH)
1325 const EC_GROUP *group;
1327 ecdhp=cert->ecdh_tmp;
1328 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1330 ecdhp=s->cert->ecdh_tmp_cb(s,
1331 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1332 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1336 al=SSL_AD_HANDSHAKE_FAILURE;
1337 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1341 if (s->s3->tmp.ecdh != NULL)
1343 EC_KEY_free(s->s3->tmp.ecdh);
1344 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1348 /* Duplicate the ECDH structure. */
1351 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1354 if (!EC_KEY_up_ref(ecdhp))
1356 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1361 s->s3->tmp.ecdh=ecdh;
1362 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
1363 (EC_KEY_get0_private_key(ecdh) == NULL) ||
1364 (s->options & SSL_OP_SINGLE_ECDH_USE))
1366 if(!EC_KEY_generate_key(ecdh))
1368 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1373 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
1374 (EC_KEY_get0_public_key(ecdh) == NULL) ||
1375 (EC_KEY_get0_private_key(ecdh) == NULL))
1377 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1381 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1382 (EC_GROUP_get_degree(group) > 163))
1384 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1388 /* XXX: For now, we only support ephemeral ECDH
1389 * keys over named (not generic) curves. For
1390 * supported named curves, curve_id is non-zero.
1393 tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
1396 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1400 /* Encode the public key.
1401 * First check the size of encoding and
1402 * allocate memory accordingly.
1404 encodedlen = EC_POINT_point2oct(group,
1405 EC_KEY_get0_public_key(ecdh),
1406 POINT_CONVERSION_UNCOMPRESSED,
1409 encodedPoint = (unsigned char *)
1410 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1411 bn_ctx = BN_CTX_new();
1412 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1414 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1419 encodedlen = EC_POINT_point2oct(group,
1420 EC_KEY_get0_public_key(ecdh),
1421 POINT_CONVERSION_UNCOMPRESSED,
1422 encodedPoint, encodedlen, bn_ctx);
1424 if (encodedlen == 0)
1426 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1430 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1432 /* XXX: For now, we only support named (not
1433 * generic) curves in ECDH ephemeral key exchanges.
1434 * In this situation, we need four additional bytes
1435 * to encode the entire ServerECDHParams
1440 /* We'll generate the serverKeyExchange message
1441 * explicitly so we can set these to NULLs
1449 #endif /* !OPENSSL_NO_ECDH */
1450 #ifndef OPENSSL_NO_PSK
1451 if (type & SSL_kPSK)
1453 /* reserve size for record length and PSK identity hint*/
1454 n+=2+strlen(s->ctx->psk_identity_hint);
1457 #endif /* !OPENSSL_NO_PSK */
1459 al=SSL_AD_HANDSHAKE_FAILURE;
1460 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1463 for (i=0; r[i] != NULL; i++)
1465 nr[i]=BN_num_bytes(r[i]);
1469 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1470 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
1472 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1475 al=SSL_AD_DECODE_ERROR;
1478 kn=EVP_PKEY_size(pkey);
1486 if (!BUF_MEM_grow_clean(buf,n+4+kn))
1488 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1491 d=(unsigned char *)s->init_buf->data;
1494 for (i=0; r[i] != NULL; i++)
1501 #ifndef OPENSSL_NO_ECDH
1502 if (type & SSL_kEECDH)
1504 /* XXX: For now, we only support named (not generic) curves.
1505 * In this situation, the serverKeyExchange message has:
1506 * [1 byte CurveType], [2 byte CurveName]
1507 * [1 byte length of encoded point], followed by
1508 * the actual encoded point itself
1510 *p = NAMED_CURVE_TYPE;
1518 memcpy((unsigned char*)p,
1519 (unsigned char *)encodedPoint,
1521 OPENSSL_free(encodedPoint);
1526 #ifndef OPENSSL_NO_PSK
1527 if (type & SSL_kPSK)
1529 /* copy PSK identity hint */
1530 s2n(strlen(s->ctx->psk_identity_hint), p);
1531 strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint));
1532 p+=strlen(s->ctx->psk_identity_hint);
1539 /* n is the length of the params, they start at &(d[4])
1540 * and p points to the space at the end. */
1541 #ifndef OPENSSL_NO_RSA
1542 if (pkey->type == EVP_PKEY_RSA)
1546 for (num=2; num > 0; num--)
1548 EVP_DigestInit_ex(&md_ctx,(num == 2)
1549 ?s->ctx->md5:s->ctx->sha1, NULL);
1550 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1551 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1552 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1553 EVP_DigestFinal_ex(&md_ctx,q,
1554 (unsigned int *)&i);
1558 if (RSA_sign(NID_md5_sha1, md_buf, j,
1559 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1561 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1569 #if !defined(OPENSSL_NO_DSA)
1570 if (pkey->type == EVP_PKEY_DSA)
1573 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1574 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1575 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1576 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1577 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1578 (unsigned int *)&i,pkey))
1580 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1588 #if !defined(OPENSSL_NO_ECDSA)
1589 if (pkey->type == EVP_PKEY_EC)
1591 /* let's do ECDSA */
1592 EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1593 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1594 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1595 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1596 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1597 (unsigned int *)&i,pkey))
1599 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
1608 /* Is this error check actually needed? */
1609 al=SSL_AD_HANDSHAKE_FAILURE;
1610 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1615 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1618 /* we should now have things packed up, so lets send
1624 s->state = SSL3_ST_SW_KEY_EXCH_B;
1625 EVP_MD_CTX_cleanup(&md_ctx);
1626 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1628 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1630 #ifndef OPENSSL_NO_ECDH
1631 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1632 BN_CTX_free(bn_ctx);
1634 EVP_MD_CTX_cleanup(&md_ctx);
1638 int ssl3_send_certificate_request(SSL *s)
1640 unsigned char *p,*d;
1642 STACK_OF(X509_NAME) *sk=NULL;
1646 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1650 d=p=(unsigned char *)&(buf->data[4]);
1652 /* get the list of acceptable cert types */
1654 n=ssl3_get_req_cert_type(s,p);
1663 sk=SSL_get_client_CA_list(s);
1667 for (i=0; i<sk_X509_NAME_num(sk); i++)
1669 name=sk_X509_NAME_value(sk,i);
1670 j=i2d_X509_NAME(name,NULL);
1671 if (!BUF_MEM_grow_clean(buf,4+n+j+2))
1673 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1676 p=(unsigned char *)&(buf->data[4+n]);
1677 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1680 i2d_X509_NAME(name,&p);
1687 i2d_X509_NAME(name,&p);
1688 j-=2; s2n(j,d); j+=2;
1694 /* else no CA names */
1695 p=(unsigned char *)&(buf->data[4+off]);
1698 d=(unsigned char *)buf->data;
1699 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1702 /* we should now have things packed up, so lets send
1707 #ifdef NETSCAPE_HANG_BUG
1708 p=(unsigned char *)s->init_buf->data + s->init_num;
1711 *(p++)=SSL3_MT_SERVER_DONE;
1718 s->state = SSL3_ST_SW_CERT_REQ_B;
1721 /* SSL3_ST_SW_CERT_REQ_B */
1722 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1727 int ssl3_get_client_key_exchange(SSL *s)
1731 unsigned long alg_k;
1733 #ifndef OPENSSL_NO_RSA
1735 EVP_PKEY *pkey=NULL;
1737 #ifndef OPENSSL_NO_DH
1741 #ifndef OPENSSL_NO_KRB5
1743 #endif /* OPENSSL_NO_KRB5 */
1745 #ifndef OPENSSL_NO_ECDH
1746 EC_KEY *srvr_ecdh = NULL;
1747 EVP_PKEY *clnt_pub_pkey = NULL;
1748 EC_POINT *clnt_ecpoint = NULL;
1749 BN_CTX *bn_ctx = NULL;
1752 n=s->method->ssl_get_message(s,
1753 SSL3_ST_SR_KEY_EXCH_A,
1754 SSL3_ST_SR_KEY_EXCH_B,
1755 SSL3_MT_CLIENT_KEY_EXCHANGE,
1759 if (!ok) return((int)n);
1760 p=(unsigned char *)s->init_msg;
1762 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1764 #ifndef OPENSSL_NO_RSA
1765 if (alg_k & SSL_kRSA)
1767 /* FIX THIS UP EAY EAY EAY EAY */
1768 if (s->s3->tmp.use_rsa_tmp)
1770 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
1771 rsa=s->cert->rsa_tmp;
1772 /* Don't do a callback because rsa_tmp should
1773 * be sent already */
1776 al=SSL_AD_HANDSHAKE_FAILURE;
1777 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
1784 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
1785 if ( (pkey == NULL) ||
1786 (pkey->type != EVP_PKEY_RSA) ||
1787 (pkey->pkey.rsa == NULL))
1789 al=SSL_AD_HANDSHAKE_FAILURE;
1790 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
1797 if (s->version > SSL3_VERSION)
1802 if (!(s->options & SSL_OP_TLS_D5_BUG))
1804 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
1814 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
1818 if (i != SSL_MAX_MASTER_KEY_LENGTH)
1820 al=SSL_AD_DECODE_ERROR;
1821 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */
1824 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
1826 /* The premaster secret must contain the same version number as the
1827 * ClientHello to detect version rollback attacks (strangely, the
1828 * protocol does not offer such protection for DH ciphersuites).
1829 * However, buggy clients exist that send the negotiated protocol
1830 * version instead if the server does not support the requested
1832 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
1833 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
1834 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
1836 al=SSL_AD_DECODE_ERROR;
1837 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */
1839 /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack
1840 * (http://eprint.iacr.org/2003/052/) exploits the version
1841 * number check as a "bad version oracle" -- an alert would
1842 * reveal that the plaintext corresponding to some ciphertext
1843 * made up by the adversary is properly formatted except
1844 * that the version number is wrong. To avoid such attacks,
1845 * we should treat this just like any other decryption error. */
1851 /* Some decryption failure -- use random value instead as countermeasure
1852 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
1853 * (see RFC 2246, section 7.4.7.1). */
1855 i = SSL_MAX_MASTER_KEY_LENGTH;
1856 p[0] = s->client_version >> 8;
1857 p[1] = s->client_version & 0xff;
1858 if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */
1862 s->session->master_key_length=
1863 s->method->ssl3_enc->generate_master_secret(s,
1864 s->session->master_key,
1866 OPENSSL_cleanse(p,i);
1870 #ifndef OPENSSL_NO_DH
1871 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
1876 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
1878 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
1888 if (n == 0L) /* the parameters are in the cert */
1890 al=SSL_AD_HANDSHAKE_FAILURE;
1891 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
1896 if (s->s3->tmp.dh == NULL)
1898 al=SSL_AD_HANDSHAKE_FAILURE;
1899 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1903 dh_srvr=s->s3->tmp.dh;
1906 pub=BN_bin2bn(p,i,NULL);
1909 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
1913 i=DH_compute_key(p,pub,dh_srvr);
1917 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
1921 DH_free(s->s3->tmp.dh);
1926 s->session->master_key_length=
1927 s->method->ssl3_enc->generate_master_secret(s,
1928 s->session->master_key,p,i);
1929 OPENSSL_cleanse(p,i);
1933 #ifndef OPENSSL_NO_KRB5
1934 if (alg_k & SSL_kKRB5)
1936 krb5_error_code krb5rc;
1937 krb5_data enc_ticket;
1938 krb5_data authenticator;
1940 KSSL_CTX *kssl_ctx = s->kssl_ctx;
1941 EVP_CIPHER_CTX ciph_ctx;
1942 EVP_CIPHER *enc = NULL;
1943 unsigned char iv[EVP_MAX_IV_LENGTH];
1944 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
1945 + EVP_MAX_BLOCK_LENGTH];
1947 krb5_timestamp authtime = 0;
1948 krb5_ticket_times ttimes;
1950 EVP_CIPHER_CTX_init(&ciph_ctx);
1952 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
1955 enc_ticket.length = i;
1957 if (n < enc_ticket.length + 6)
1959 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1960 SSL_R_DATA_LENGTH_TOO_LONG);
1964 enc_ticket.data = (char *)p;
1965 p+=enc_ticket.length;
1968 authenticator.length = i;
1970 if (n < enc_ticket.length + authenticator.length + 6)
1972 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1973 SSL_R_DATA_LENGTH_TOO_LONG);
1977 authenticator.data = (char *)p;
1978 p+=authenticator.length;
1982 enc_pms.data = (char *)p;
1985 /* Note that the length is checked again below,
1988 if(enc_pms.length > sizeof pms)
1990 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1991 SSL_R_DATA_LENGTH_TOO_LONG);
1995 if (n != (long)(enc_ticket.length + authenticator.length +
1996 enc_pms.length + 6))
1998 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
1999 SSL_R_DATA_LENGTH_TOO_LONG);
2003 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
2007 printf("kssl_sget_tkt 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 /* Note: no authenticator is not considered an error,
2018 ** but will return authtime == 0.
2020 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
2021 &authtime, &kssl_err)) != 0)
2024 printf("kssl_check_authent rtn %d [%d]\n",
2025 krb5rc, kssl_err.reason);
2027 printf("kssl_err text= %s\n", kssl_err.text);
2028 #endif /* KSSL_DEBUG */
2029 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2034 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
2036 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc);
2041 kssl_ctx_show(kssl_ctx);
2042 #endif /* KSSL_DEBUG */
2044 enc = kssl_map_enc(kssl_ctx->enctype);
2048 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2050 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
2052 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2053 SSL_R_DECRYPTION_FAILED);
2056 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
2057 (unsigned char *)enc_pms.data, enc_pms.length))
2059 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2060 SSL_R_DECRYPTION_FAILED);
2063 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2065 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2066 SSL_R_DATA_LENGTH_TOO_LONG);
2069 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
2071 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2072 SSL_R_DECRYPTION_FAILED);
2076 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2078 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2079 SSL_R_DATA_LENGTH_TOO_LONG);
2082 if (!((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
2084 /* The premaster secret must contain the same version number as the
2085 * ClientHello to detect version rollback attacks (strangely, the
2086 * protocol does not offer such protection for DH ciphersuites).
2087 * However, buggy clients exist that send random bytes instead of
2088 * the protocol version.
2089 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients.
2090 * (Perhaps we should have a separate BUG value for the Kerberos cipher)
2092 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
2093 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
2095 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2096 SSL_AD_DECODE_ERROR);
2101 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2103 s->session->master_key_length=
2104 s->method->ssl3_enc->generate_master_secret(s,
2105 s->session->master_key, pms, outl);
2107 if (kssl_ctx->client_princ)
2109 size_t len = strlen(kssl_ctx->client_princ);
2110 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
2112 s->session->krb5_client_princ_len = len;
2113 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
2118 /* Was doing kssl_ctx_free() here,
2119 ** but it caused problems for apache.
2120 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
2121 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
2125 #endif /* OPENSSL_NO_KRB5 */
2127 #ifndef OPENSSL_NO_ECDH
2128 if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2133 const EC_GROUP *group;
2134 const BIGNUM *priv_key;
2136 /* initialize structures for server's ECDH key pair */
2137 if ((srvr_ecdh = EC_KEY_new()) == NULL)
2139 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2140 ERR_R_MALLOC_FAILURE);
2144 /* Let's get server private key and group information */
2145 if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2147 /* use the certificate */
2148 tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec;
2152 /* use the ephermeral values we saved when
2153 * generating the ServerKeyExchange msg.
2155 tkey = s->s3->tmp.ecdh;
2158 group = EC_KEY_get0_group(tkey);
2159 priv_key = EC_KEY_get0_private_key(tkey);
2161 if (!EC_KEY_set_group(srvr_ecdh, group) ||
2162 !EC_KEY_set_private_key(srvr_ecdh, priv_key))
2164 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2169 /* Let's get client's public key */
2170 if ((clnt_ecpoint = EC_POINT_new(group)) == NULL)
2172 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2173 ERR_R_MALLOC_FAILURE);
2179 /* Client Publickey was in Client Certificate */
2181 if (alg_k & SSL_kEECDH)
2183 al=SSL_AD_HANDSHAKE_FAILURE;
2184 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
2187 if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer))
2189 (clnt_pub_pkey->type != EVP_PKEY_EC))
2191 /* XXX: For now, we do not support client
2192 * authentication using ECDH certificates
2193 * so this branch (n == 0L) of the code is
2194 * never executed. When that support is
2195 * added, we ought to ensure the key
2196 * received in the certificate is
2197 * authorized for key agreement.
2198 * ECDH_compute_key implicitly checks that
2199 * the two ECDH shares are for the same
2202 al=SSL_AD_HANDSHAKE_FAILURE;
2203 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2204 SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
2208 if (EC_POINT_copy(clnt_ecpoint,
2209 EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0)
2211 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2215 ret = 2; /* Skip certificate verify processing */
2219 /* Get client's public key from encoded point
2220 * in the ClientKeyExchange message.
2222 if ((bn_ctx = BN_CTX_new()) == NULL)
2224 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2225 ERR_R_MALLOC_FAILURE);
2229 /* Get encoded point length */
2232 if (EC_POINT_oct2point(group,
2233 clnt_ecpoint, p, i, bn_ctx) == 0)
2235 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2239 /* p is pointing to somewhere in the buffer
2240 * currently, so set it to the start
2242 p=(unsigned char *)s->init_buf->data;
2245 /* Compute the shared pre-master secret */
2246 field_size = EC_GROUP_get_degree(group);
2247 if (field_size <= 0)
2249 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2253 i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL);
2256 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2261 EVP_PKEY_free(clnt_pub_pkey);
2262 EC_POINT_free(clnt_ecpoint);
2263 if (srvr_ecdh != NULL)
2264 EC_KEY_free(srvr_ecdh);
2265 BN_CTX_free(bn_ctx);
2267 /* Compute the master secret */
2268 s->session->master_key_length = s->method->ssl3_enc-> \
2269 generate_master_secret(s, s->session->master_key, p, i);
2271 OPENSSL_cleanse(p, i);
2276 #ifndef OPENSSL_NO_PSK
2277 if (alg_k & SSL_kPSK)
2279 unsigned char *t = NULL;
2280 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2281 unsigned int pre_ms_len = 0, psk_len = 0;
2283 char tmp_id[PSK_MAX_IDENTITY_LEN+1];
2285 al=SSL_AD_HANDSHAKE_FAILURE;
2290 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2291 SSL_R_LENGTH_MISMATCH);
2294 if (i > PSK_MAX_IDENTITY_LEN)
2296 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2297 SSL_R_DATA_LENGTH_TOO_LONG);
2300 if (s->psk_server_callback == NULL)
2302 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2303 SSL_R_PSK_NO_SERVER_CB);
2307 /* Create guaranteed NULL-terminated identity
2308 * string for the callback */
2309 memcpy(tmp_id, p, i);
2310 memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
2311 psk_len = s->psk_server_callback(s, tmp_id,
2312 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2313 OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1);
2315 if (psk_len > PSK_MAX_PSK_LEN)
2317 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2318 ERR_R_INTERNAL_ERROR);
2321 else if (psk_len == 0)
2323 /* PSK related to the given identity not found */
2324 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2325 SSL_R_PSK_IDENTITY_NOT_FOUND);
2326 al=SSL_AD_UNKNOWN_PSK_IDENTITY;
2330 /* create PSK pre_master_secret */
2331 pre_ms_len=2+psk_len+2+psk_len;
2333 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2335 memset(t, 0, psk_len);
2339 if (s->session->psk_identity != NULL)
2340 OPENSSL_free(s->session->psk_identity);
2341 s->session->psk_identity = BUF_strdup((char *)p);
2342 if (s->session->psk_identity == NULL)
2344 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2345 ERR_R_MALLOC_FAILURE);
2349 if (s->session->psk_identity_hint != NULL)
2350 OPENSSL_free(s->session->psk_identity_hint);
2351 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2352 if (s->ctx->psk_identity_hint != NULL &&
2353 s->session->psk_identity_hint == NULL)
2355 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2356 ERR_R_MALLOC_FAILURE);
2360 s->session->master_key_length=
2361 s->method->ssl3_enc->generate_master_secret(s,
2362 s->session->master_key, psk_or_pre_ms, pre_ms_len);
2365 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2372 al=SSL_AD_HANDSHAKE_FAILURE;
2373 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2374 SSL_R_UNKNOWN_CIPHER_TYPE);
2380 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2381 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH)
2384 #ifndef OPENSSL_NO_ECDH
2385 EVP_PKEY_free(clnt_pub_pkey);
2386 EC_POINT_free(clnt_ecpoint);
2387 if (srvr_ecdh != NULL)
2388 EC_KEY_free(srvr_ecdh);
2389 BN_CTX_free(bn_ctx);
2394 int ssl3_get_cert_verify(SSL *s)
2396 EVP_PKEY *pkey=NULL;
2403 n=s->method->ssl_get_message(s,
2404 SSL3_ST_SR_CERT_VRFY_A,
2405 SSL3_ST_SR_CERT_VRFY_B,
2410 if (!ok) return((int)n);
2412 if (s->session->peer != NULL)
2414 peer=s->session->peer;
2415 pkey=X509_get_pubkey(peer);
2416 type=X509_certificate_type(peer,pkey);
2424 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
2426 s->s3->tmp.reuse_message=1;
2427 if ((peer != NULL) && (type | EVP_PKT_SIGN))
2429 al=SSL_AD_UNEXPECTED_MESSAGE;
2430 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
2439 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
2440 al=SSL_AD_UNEXPECTED_MESSAGE;
2444 if (!(type & EVP_PKT_SIGN))
2446 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
2447 al=SSL_AD_ILLEGAL_PARAMETER;
2451 if (s->s3->change_cipher_spec)
2453 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
2454 al=SSL_AD_UNEXPECTED_MESSAGE;
2458 /* we now have a signature that we need to verify */
2459 p=(unsigned char *)s->init_msg;
2464 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
2465 al=SSL_AD_DECODE_ERROR;
2469 j=EVP_PKEY_size(pkey);
2470 if ((i > j) || (n > j) || (n <= 0))
2472 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
2473 al=SSL_AD_DECODE_ERROR;
2477 #ifndef OPENSSL_NO_RSA
2478 if (pkey->type == EVP_PKEY_RSA)
2480 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
2481 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
2485 al=SSL_AD_DECRYPT_ERROR;
2486 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
2491 al=SSL_AD_DECRYPT_ERROR;
2492 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
2498 #ifndef OPENSSL_NO_DSA
2499 if (pkey->type == EVP_PKEY_DSA)
2501 j=DSA_verify(pkey->save_type,
2502 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2503 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
2507 al=SSL_AD_DECRYPT_ERROR;
2508 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
2514 #ifndef OPENSSL_NO_ECDSA
2515 if (pkey->type == EVP_PKEY_EC)
2517 j=ECDSA_verify(pkey->save_type,
2518 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2519 SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec);
2523 al=SSL_AD_DECRYPT_ERROR;
2524 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
2525 SSL_R_BAD_ECDSA_SIGNATURE);
2532 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
2533 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
2542 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2545 EVP_PKEY_free(pkey);
2549 int ssl3_get_client_certificate(SSL *s)
2551 int i,ok,al,ret= -1;
2553 unsigned long l,nc,llen,n;
2554 const unsigned char *p,*q;
2556 STACK_OF(X509) *sk=NULL;
2558 n=s->method->ssl_get_message(s,
2565 if (!ok) return((int)n);
2567 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
2569 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
2570 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2572 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2573 al=SSL_AD_HANDSHAKE_FAILURE;
2576 /* If tls asked for a client cert, the client must return a 0 list */
2577 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
2579 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
2580 al=SSL_AD_UNEXPECTED_MESSAGE;
2583 s->s3->tmp.reuse_message=1;
2587 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
2589 al=SSL_AD_UNEXPECTED_MESSAGE;
2590 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
2593 p=d=(unsigned char *)s->init_msg;
2595 if ((sk=sk_X509_new_null()) == NULL)
2597 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2604 al=SSL_AD_DECODE_ERROR;
2605 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
2608 for (nc=0; nc<llen; )
2611 if ((l+nc+3) > llen)
2613 al=SSL_AD_DECODE_ERROR;
2614 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2619 x=d2i_X509(NULL,&p,l);
2622 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
2627 al=SSL_AD_DECODE_ERROR;
2628 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2631 if (!sk_X509_push(sk,x))
2633 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2640 if (sk_X509_num(sk) <= 0)
2642 /* TLS does not mind 0 certs returned */
2643 if (s->version == SSL3_VERSION)
2645 al=SSL_AD_HANDSHAKE_FAILURE;
2646 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
2649 /* Fail for TLS only if we required a certificate */
2650 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
2651 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2653 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2654 al=SSL_AD_HANDSHAKE_FAILURE;
2660 i=ssl_verify_cert_chain(s,sk);
2663 al=ssl_verify_alarm_type(s->verify_result);
2664 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
2669 if (s->session->peer != NULL) /* This should not be needed */
2670 X509_free(s->session->peer);
2671 s->session->peer=sk_X509_shift(sk);
2672 s->session->verify_result = s->verify_result;
2674 /* With the current implementation, sess_cert will always be NULL
2675 * when we arrive here. */
2676 if (s->session->sess_cert == NULL)
2678 s->session->sess_cert = ssl_sess_cert_new();
2679 if (s->session->sess_cert == NULL)
2681 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
2685 if (s->session->sess_cert->cert_chain != NULL)
2686 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
2687 s->session->sess_cert->cert_chain=sk;
2688 /* Inconsistency alert: cert_chain does *not* include the
2689 * peer's own certificate, while we do include it in s3_clnt.c */
2697 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2700 if (x != NULL) X509_free(x);
2701 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
2705 int ssl3_send_server_certificate(SSL *s)
2710 if (s->state == SSL3_ST_SW_CERT_A)
2712 x=ssl_get_server_send_cert(s);
2715 /* VRS: allow null cert if auth == KRB5 */
2716 if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) ||
2717 (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5))
2719 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
2724 l=ssl3_output_cert_chain(s,x);
2725 s->state=SSL3_ST_SW_CERT_B;
2730 /* SSL3_ST_SW_CERT_B */
2731 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2733 #ifndef OPENSSLP_NO_TLSEXT
2734 int ssl3_send_newsession_ticket(SSL *s)
2736 if (s->state == SSL3_ST_SW_SESSION_TICKET_A)
2738 unsigned char *p, *senc, *macstart;
2744 /* get session encoding length */
2745 slen = i2d_SSL_SESSION(s->session, NULL);
2746 /* Some length values are 16 bits, so forget it if session is
2751 /* Grow buffer if need be: the length calculation is as
2752 * follows 1 (size of message name) + 3 (message length
2753 * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) +
2754 * 16 (key name) + max_iv_len (iv length) +
2755 * session_length + max_enc_block_size (max encrypted session
2756 * length) + max_md_size (HMAC).
2758 if (!BUF_MEM_grow(s->init_buf,
2759 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH +
2760 EVP_MAX_MD_SIZE + slen))
2762 senc = OPENSSL_malloc(slen);
2766 i2d_SSL_SESSION(s->session, &p);
2768 p=(unsigned char *)s->init_buf->data;
2770 *(p++)=SSL3_MT_NEWSESSION_TICKET;
2771 /* Skip message length for now */
2773 l2n(s->session->tlsext_tick_lifetime_hint, p);
2774 /* Skip ticket length for now */
2776 /* Output key name */
2778 memcpy(p, s->ctx->tlsext_tick_key_name, 16);
2780 /* Generate and output IV */
2781 RAND_pseudo_bytes(p, 16);
2782 EVP_CIPHER_CTX_init(&ctx);
2783 /* Encrypt session data */
2784 EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
2785 s->ctx->tlsext_tick_aes_key, p);
2787 EVP_EncryptUpdate(&ctx, p, &len, senc, slen);
2789 EVP_EncryptFinal(&ctx, p, &len);
2791 EVP_CIPHER_CTX_cleanup(&ctx);
2793 HMAC_CTX_init(&hctx);
2794 HMAC_Init_ex(&hctx, s->ctx->tlsext_tick_hmac_key, 16,
2796 HMAC_Update(&hctx, macstart, p - macstart);
2797 HMAC_Final(&hctx, p, &hlen);
2798 HMAC_CTX_cleanup(&hctx);
2801 /* Now write out lengths: p points to end of data written */
2803 len = p - (unsigned char *)s->init_buf->data;
2804 p=(unsigned char *)s->init_buf->data + 1;
2805 l2n3(len - 4, p); /* Message length */
2807 s2n(len - 10, p); /* Ticket length */
2809 /* number of bytes to write */
2811 s->state=SSL3_ST_SW_SESSION_TICKET_B;
2816 /* SSL3_ST_SW_SESSION_TICKET_B */
2817 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));