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;
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))
261 s->s3->flags &= ~SSL3_FLAGS_SGC_RESTART_DONE;
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++;
274 else if (!s->s3->send_connection_binding &&
275 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
277 /* Server attempting to renegotiate with
278 * client that doesn't support secure
281 SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
282 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
288 /* s->state == SSL_ST_RENEGOTIATE,
289 * we will just send a HelloRequest */
290 s->ctx->stats.sess_accept_renegotiate++;
291 s->state=SSL3_ST_SW_HELLO_REQ_A;
295 case SSL3_ST_SW_HELLO_REQ_A:
296 case SSL3_ST_SW_HELLO_REQ_B:
299 ret=ssl3_send_hello_request(s);
300 if (ret <= 0) goto end;
301 s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C;
302 s->state=SSL3_ST_SW_FLUSH;
305 ssl3_init_finished_mac(s);
308 case SSL3_ST_SW_HELLO_REQ_C:
312 case SSL3_ST_SR_CLNT_HELLO_A:
313 case SSL3_ST_SR_CLNT_HELLO_B:
314 case SSL3_ST_SR_CLNT_HELLO_C:
317 ret=ssl3_get_client_hello(s);
318 if (ret <= 0) goto end;
321 s->state=SSL3_ST_SW_SRVR_HELLO_A;
325 case SSL3_ST_SW_SRVR_HELLO_A:
326 case SSL3_ST_SW_SRVR_HELLO_B:
327 ret=ssl3_send_server_hello(s);
328 if (ret <= 0) goto end;
329 #ifndef OPENSSL_NO_TLSEXT
332 if (s->tlsext_ticket_expected)
333 s->state=SSL3_ST_SW_SESSION_TICKET_A;
335 s->state=SSL3_ST_SW_CHANGE_A;
339 s->state=SSL3_ST_SW_CHANGE_A;
342 s->state=SSL3_ST_SW_CERT_A;
346 case SSL3_ST_SW_CERT_A:
347 case SSL3_ST_SW_CERT_B:
348 /* Check if it is anon DH or anon ECDH, */
349 /* normal PSK or KRB5 */
350 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
351 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
352 && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
354 ret=ssl3_send_server_certificate(s);
355 if (ret <= 0) goto end;
356 #ifndef OPENSSL_NO_TLSEXT
357 if (s->tlsext_status_expected)
358 s->state=SSL3_ST_SW_CERT_STATUS_A;
360 s->state=SSL3_ST_SW_KEY_EXCH_A;
365 s->state=SSL3_ST_SW_KEY_EXCH_A;
372 s->state=SSL3_ST_SW_KEY_EXCH_A;
377 case SSL3_ST_SW_KEY_EXCH_A:
378 case SSL3_ST_SW_KEY_EXCH_B:
379 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
381 /* clear this, it may get reset by
382 * send_server_key_exchange */
383 if ((s->options & SSL_OP_EPHEMERAL_RSA)
384 #ifndef OPENSSL_NO_KRB5
385 && !(alg_k & SSL_kKRB5)
386 #endif /* OPENSSL_NO_KRB5 */
388 /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
389 * even when forbidden by protocol specs
390 * (handshake may fail as clients are not required to
391 * be able to handle this) */
392 s->s3->tmp.use_rsa_tmp=1;
394 s->s3->tmp.use_rsa_tmp=0;
397 /* only send if a DH key exchange, fortezza or
398 * RSA but we have a sign only certificate
400 * PSK: may send PSK identity hints
402 * For ECC ciphersuites, we send a serverKeyExchange
403 * message only if the cipher suite is either
404 * ECDH-anon or ECDHE. In other cases, the
405 * server certificate contains the server's
406 * public key for key exchange.
408 if (s->s3->tmp.use_rsa_tmp
409 /* PSK: send ServerKeyExchange if PSK identity
410 * hint if provided */
411 #ifndef OPENSSL_NO_PSK
412 || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint)
414 || (alg_k & (SSL_kDHr|SSL_kDHd|SSL_kEDH))
415 || (alg_k & SSL_kEECDH)
416 || ((alg_k & SSL_kRSA)
417 && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
418 || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
419 && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
425 ret=ssl3_send_server_key_exchange(s);
426 if (ret <= 0) goto end;
431 s->state=SSL3_ST_SW_CERT_REQ_A;
435 case SSL3_ST_SW_CERT_REQ_A:
436 case SSL3_ST_SW_CERT_REQ_B:
437 if (/* don't request cert unless asked for it: */
438 !(s->verify_mode & SSL_VERIFY_PEER) ||
439 /* if SSL_VERIFY_CLIENT_ONCE is set,
440 * don't request cert during re-negotiation: */
441 ((s->session->peer != NULL) &&
442 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) ||
443 /* never request cert in anonymous ciphersuites
444 * (see section "Certificate request" in SSL 3 drafts
445 * and in RFC 2246): */
446 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
447 /* ... except when the application insists on verification
448 * (against the specs, but s3_clnt.c accepts this for SSL 3) */
449 !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) ||
450 /* never request cert in Kerberos ciphersuites */
451 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)
452 /* With normal PSK Certificates and
453 * Certificate Requests are omitted */
454 || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
456 /* no cert request */
458 s->s3->tmp.cert_request=0;
459 s->state=SSL3_ST_SW_SRVR_DONE_A;
463 s->s3->tmp.cert_request=1;
464 ret=ssl3_send_certificate_request(s);
465 if (ret <= 0) goto end;
466 #ifndef NETSCAPE_HANG_BUG
467 s->state=SSL3_ST_SW_SRVR_DONE_A;
469 s->state=SSL3_ST_SW_FLUSH;
470 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
476 case SSL3_ST_SW_SRVR_DONE_A:
477 case SSL3_ST_SW_SRVR_DONE_B:
478 ret=ssl3_send_server_done(s);
479 if (ret <= 0) goto end;
480 s->s3->tmp.next_state=SSL3_ST_SR_CERT_A;
481 s->state=SSL3_ST_SW_FLUSH;
485 case SSL3_ST_SW_FLUSH:
487 /* This code originally checked to see if
488 * any data was pending using BIO_CTRL_INFO
489 * and then flushed. This caused problems
490 * as documented in PR#1939. The proposed
491 * fix doesn't completely resolve this issue
492 * as buggy implementations of BIO_CTRL_PENDING
493 * still exist. So instead we just flush
497 s->rwstate=SSL_WRITING;
498 if (BIO_flush(s->wbio) <= 0)
503 s->rwstate=SSL_NOTHING;
505 s->state=s->s3->tmp.next_state;
508 case SSL3_ST_SR_CERT_A:
509 case SSL3_ST_SR_CERT_B:
510 /* Check for second client hello (MS SGC) */
511 ret = ssl3_check_client_hello(s);
515 s->state = SSL3_ST_SR_CLNT_HELLO_C;
517 if (s->s3->tmp.cert_request)
519 ret=ssl3_get_client_certificate(s);
520 if (ret <= 0) goto end;
523 s->state=SSL3_ST_SR_KEY_EXCH_A;
527 case SSL3_ST_SR_KEY_EXCH_A:
528 case SSL3_ST_SR_KEY_EXCH_B:
529 ret=ssl3_get_client_key_exchange(s);
534 /* For the ECDH ciphersuites when
535 * the client sends its ECDH pub key in
536 * a certificate, the CertificateVerify
537 * message is not sent.
538 * Also for GOST ciphersuites when
539 * the client uses its key from the certificate
542 s->state=SSL3_ST_SR_FINISHED_A;
550 s->state=SSL3_ST_SR_CERT_VRFY_A;
553 /* We need to get hashes here so if there is
554 * a client cert, it can be verified
555 * FIXME - digest processing for CertificateVerify
556 * should be generalized. But it is next step
558 if (s->s3->handshake_buffer)
559 if (!ssl3_digest_cached_records(s))
561 for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++)
562 if (s->s3->handshake_dgst[dgst_num])
566 s->method->ssl3_enc->cert_verify_mac(s,EVP_MD_CTX_type(s->s3->handshake_dgst[dgst_num]),&(s->s3->tmp.cert_verify_md[offset]));
567 dgst_size=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]);
578 case SSL3_ST_SR_CERT_VRFY_A:
579 case SSL3_ST_SR_CERT_VRFY_B:
581 /* we should decide if we expected this one */
582 ret=ssl3_get_cert_verify(s);
583 if (ret <= 0) goto end;
585 s->state=SSL3_ST_SR_FINISHED_A;
589 case SSL3_ST_SR_FINISHED_A:
590 case SSL3_ST_SR_FINISHED_B:
591 ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A,
592 SSL3_ST_SR_FINISHED_B);
593 if (ret <= 0) goto end;
594 #ifndef OPENSSL_NO_TLSEXT
595 if (s->tlsext_ticket_expected)
596 s->state=SSL3_ST_SW_SESSION_TICKET_A;
604 s->state=SSL3_ST_SW_CHANGE_A;
608 #ifndef OPENSSL_NO_TLSEXT
609 case SSL3_ST_SW_SESSION_TICKET_A:
610 case SSL3_ST_SW_SESSION_TICKET_B:
611 ret=ssl3_send_newsession_ticket(s);
612 if (ret <= 0) goto end;
613 s->state=SSL3_ST_SW_CHANGE_A;
617 case SSL3_ST_SW_CERT_STATUS_A:
618 case SSL3_ST_SW_CERT_STATUS_B:
619 ret=ssl3_send_cert_status(s);
620 if (ret <= 0) goto end;
621 s->state=SSL3_ST_SW_KEY_EXCH_A;
627 case SSL3_ST_SW_CHANGE_A:
628 case SSL3_ST_SW_CHANGE_B:
630 s->session->cipher=s->s3->tmp.new_cipher;
631 if (!s->method->ssl3_enc->setup_key_block(s))
632 { ret= -1; goto end; }
634 ret=ssl3_send_change_cipher_spec(s,
635 SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B);
637 if (ret <= 0) goto end;
638 s->state=SSL3_ST_SW_FINISHED_A;
641 if (!s->method->ssl3_enc->change_cipher_state(s,
642 SSL3_CHANGE_CIPHER_SERVER_WRITE))
650 case SSL3_ST_SW_FINISHED_A:
651 case SSL3_ST_SW_FINISHED_B:
652 ret=ssl3_send_finished(s,
653 SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B,
654 s->method->ssl3_enc->server_finished_label,
655 s->method->ssl3_enc->server_finished_label_len);
656 if (ret <= 0) goto end;
657 s->state=SSL3_ST_SW_FLUSH;
659 s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A;
661 s->s3->tmp.next_state=SSL_ST_OK;
666 /* clean a few things up */
667 ssl3_cleanup_key_block(s);
669 BUF_MEM_free(s->init_buf);
672 /* remove buffering on output */
673 ssl_free_wbio_buffer(s);
677 if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
679 /* actually not necessarily a 'new' session unless
680 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
684 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
686 s->ctx->stats.sess_accept_good++;
688 s->handshake_func=ssl3_accept;
690 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
698 SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE);
704 if (!s->s3->tmp.reuse_message && !skip)
708 if ((ret=BIO_flush(s->wbio)) <= 0)
713 if ((cb != NULL) && (s->state != state))
717 cb(s,SSL_CB_ACCEPT_LOOP,1);
724 /* BIO_flush(s->wbio); */
728 cb(s,SSL_CB_ACCEPT_EXIT,ret);
732 int ssl3_send_hello_request(SSL *s)
736 if (s->state == SSL3_ST_SW_HELLO_REQ_A)
738 p=(unsigned char *)s->init_buf->data;
739 *(p++)=SSL3_MT_HELLO_REQUEST;
744 s->state=SSL3_ST_SW_HELLO_REQ_B;
745 /* number of bytes to write */
750 /* SSL3_ST_SW_HELLO_REQ_B */
751 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
754 int ssl3_check_client_hello(SSL *s)
759 /* this function is called when we really expect a Certificate message,
760 * so permit appropriate message length */
761 n=s->method->ssl_get_message(s,
767 if (!ok) return((int)n);
768 s->s3->tmp.reuse_message = 1;
769 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO)
771 /* We only allow the client to restart the handshake once per
773 if (s->s3->flags & SSL3_FLAGS_SGC_RESTART_DONE)
775 SSLerr(SSL_F_SSL3_CHECK_CLIENT_HELLO, SSL_R_MULTIPLE_SGC_RESTARTS);
778 /* Throw away what we have done so far in the current handshake,
779 * which will now be aborted. (A full SSL_clear would be too much.) */
780 #ifndef OPENSSL_NO_DH
781 if (s->s3->tmp.dh != NULL)
783 DH_free(s->s3->tmp.dh);
784 s->s3->tmp.dh = NULL;
787 #ifndef OPENSSL_NO_ECDH
788 if (s->s3->tmp.ecdh != NULL)
790 EC_KEY_free(s->s3->tmp.ecdh);
791 s->s3->tmp.ecdh = NULL;
794 s->s3->flags |= SSL3_FLAGS_SGC_RESTART_DONE;
800 int ssl3_get_client_hello(SSL *s)
802 int i,j,ok,al,ret= -1;
803 unsigned int cookie_len;
806 unsigned char *p,*d,*q;
808 #ifndef OPENSSL_NO_COMP
811 STACK_OF(SSL_CIPHER) *ciphers=NULL;
813 /* We do this so that we will respond with our native type.
814 * If we are TLSv1 and we get SSLv3, we will respond with TLSv1,
815 * This down switching should be handled by a different method.
816 * If we are SSLv3, we will respond with SSLv3, even if prompted with
819 if (s->state == SSL3_ST_SR_CLNT_HELLO_A)
821 s->state=SSL3_ST_SR_CLNT_HELLO_B;
824 n=s->method->ssl_get_message(s,
825 SSL3_ST_SR_CLNT_HELLO_B,
826 SSL3_ST_SR_CLNT_HELLO_C,
827 SSL3_MT_CLIENT_HELLO,
828 SSL3_RT_MAX_PLAIN_LENGTH,
831 if (!ok) return((int)n);
833 d=p=(unsigned char *)s->init_msg;
835 /* use version from inside client hello, not from record header
836 * (may differ: see RFC 2246, Appendix E, second paragraph) */
837 s->client_version=(((int)p[0])<<8)|(int)p[1];
840 if ((s->version == DTLS1_VERSION && s->client_version > s->version) ||
841 (s->version != DTLS1_VERSION && s->client_version < s->version))
843 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER);
844 if ((s->client_version>>8) == SSL3_VERSION_MAJOR)
846 /* similar to ssl3_get_record, send alert using remote version number */
847 s->version = s->client_version;
849 al = SSL_AD_PROTOCOL_VERSION;
853 /* If we require cookies and this ClientHello doesn't
854 * contain one, just return since we do not want to
855 * allocate any memory yet. So check cookie length...
857 if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)
859 unsigned int session_length, cookie_length;
861 session_length = *(p + SSL3_RANDOM_SIZE);
862 cookie_length = *(p + SSL3_RANDOM_SIZE + session_length + 1);
864 if (cookie_length == 0)
868 /* load the client random */
869 memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE);
872 /* get the session-id */
876 /* Versions before 0.9.7 always allow session reuse during renegotiation
877 * (i.e. when s->new_session is true), option
878 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7.
879 * Maybe this optional behaviour should always have been the default,
880 * but we cannot safely change the default behaviour (or new applications
881 * might be written that become totally unsecure when compiled with
882 * an earlier library version)
884 if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)))
886 if (!ssl_get_new_session(s,1))
891 i=ssl_get_prev_session(s, p, j, d + n);
893 { /* previous session */
900 if (!ssl_get_new_session(s,1))
907 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
913 * The ClientHello may contain a cookie even if the
914 * HelloVerify message has not been sent--make sure that it
915 * does not cause an overflow.
917 if ( cookie_len > sizeof(s->d1->rcvd_cookie))
920 al = SSL_AD_DECODE_ERROR;
921 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH);
925 /* verify the cookie if appropriate option is set. */
926 if ((SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) &&
929 memcpy(s->d1->rcvd_cookie, p, cookie_len);
931 if ( s->ctx->app_verify_cookie_cb != NULL)
933 if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie,
936 al=SSL_AD_HANDSHAKE_FAILURE;
937 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
938 SSL_R_COOKIE_MISMATCH);
941 /* else cookie verification succeeded */
943 else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie,
944 s->d1->cookie_len) != 0) /* default verification */
946 al=SSL_AD_HANDSHAKE_FAILURE;
947 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,
948 SSL_R_COOKIE_MISMATCH);
959 if ((i == 0) && (j != 0))
961 /* we need a cipher if we are not resuming a session */
962 al=SSL_AD_ILLEGAL_PARAMETER;
963 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED);
968 /* not enough data */
969 al=SSL_AD_DECODE_ERROR;
970 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
973 if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers))
980 /* If it is a hit, check that the cipher is in the list */
981 if ((s->hit) && (i > 0))
984 id=s->session->cipher->id;
987 printf("client sent %d ciphers\n",sk_num(ciphers));
989 for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++)
991 c=sk_SSL_CIPHER_value(ciphers,i);
993 printf("client [%2d of %2d]:%s\n",
994 i,sk_num(ciphers),SSL_CIPHER_get_name(c));
1002 /* Disabled because it can be used in a ciphersuite downgrade
1003 * attack: CVE-2010-4180.
1006 if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1))
1008 /* Special case as client bug workaround: the previously used cipher may
1009 * not be in the current list, the client instead might be trying to
1010 * continue using a cipher that before wasn't chosen due to server
1011 * preferences. We'll have to reject the connection if the cipher is not
1012 * enabled, though. */
1013 c = sk_SSL_CIPHER_value(ciphers, 0);
1014 if (sk_SSL_CIPHER_find(SSL_get_ciphers(s), c) >= 0)
1016 s->session->cipher = c;
1023 /* we need to have the cipher in the cipher
1024 * list if we are asked to reuse it */
1025 al=SSL_AD_ILLEGAL_PARAMETER;
1026 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING);
1035 /* not enough data */
1036 al=SSL_AD_DECODE_ERROR;
1037 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH);
1043 if (p[j] == 0) break;
1050 al=SSL_AD_DECODE_ERROR;
1051 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED);
1055 #ifndef OPENSSL_NO_TLSEXT
1057 if (s->version >= SSL3_VERSION)
1059 if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al))
1061 /* 'al' set by ssl_parse_clienthello_tlsext */
1062 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT);
1066 if (ssl_check_clienthello_tlsext_early(s) <= 0) {
1067 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
1071 /* Check if we want to use external pre-shared secret for this
1072 * handshake for not reused session only. We need to generate
1073 * server_random before calling tls_session_secret_cb in order to allow
1074 * SessionTicket processing to use it in key derivation. */
1078 Time=(unsigned long)time(NULL); /* Time */
1079 pos=s->s3->server_random;
1081 if (RAND_pseudo_bytes(pos,SSL3_RANDOM_SIZE-4) <= 0)
1083 al=SSL_AD_INTERNAL_ERROR;
1088 if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb)
1090 SSL_CIPHER *pref_cipher=NULL;
1092 s->session->master_key_length=sizeof(s->session->master_key);
1093 if(s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length,
1094 ciphers, &pref_cipher, s->tls_session_secret_cb_arg))
1097 s->session->ciphers=ciphers;
1098 s->session->verify_result=X509_V_OK;
1102 /* check if some cipher was preferred by call back */
1103 pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s));
1104 if (pref_cipher == NULL)
1106 al=SSL_AD_HANDSHAKE_FAILURE;
1107 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
1111 s->session->cipher=pref_cipher;
1114 sk_SSL_CIPHER_free(s->cipher_list);
1116 if (s->cipher_list_by_id)
1117 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1119 s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers);
1120 s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers);
1125 /* Worst case, we will use the NULL compression, but if we have other
1126 * options, we will now look for them. We have i-1 compression
1127 * algorithms from the client, starting at q. */
1128 s->s3->tmp.new_compression=NULL;
1129 #ifndef OPENSSL_NO_COMP
1130 /* This only happens if we have a cache hit */
1131 if (s->session->compress_meth != 0)
1133 int m, comp_id = s->session->compress_meth;
1134 /* Perform sanity checks on resumed compression algorithm */
1135 /* Can't disable compression */
1136 if (s->options & SSL_OP_NO_COMPRESSION)
1138 al=SSL_AD_INTERNAL_ERROR;
1139 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1142 /* Look for resumed compression method */
1143 for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++)
1145 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
1146 if (comp_id == comp->id)
1148 s->s3->tmp.new_compression=comp;
1152 if (s->s3->tmp.new_compression == NULL)
1154 al=SSL_AD_INTERNAL_ERROR;
1155 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INVALID_COMPRESSION_ALGORITHM);
1158 /* Look for resumed method in compression list */
1159 for (m = 0; m < i; m++)
1161 if (q[m] == comp_id)
1166 al=SSL_AD_ILLEGAL_PARAMETER;
1167 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING);
1173 else if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods)
1174 { /* See if we have a match */
1175 int m,nn,o,v,done=0;
1177 nn=sk_SSL_COMP_num(s->ctx->comp_methods);
1178 for (m=0; m<nn; m++)
1180 comp=sk_SSL_COMP_value(s->ctx->comp_methods,m);
1193 s->s3->tmp.new_compression=comp;
1198 /* If compression is disabled we'd better not try to resume a session
1199 * using compression.
1201 if (s->session->compress_meth != 0)
1203 al=SSL_AD_INTERNAL_ERROR;
1204 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1209 /* Given s->session->ciphers and SSL_get_ciphers, we must
1214 #ifdef OPENSSL_NO_COMP
1215 s->session->compress_meth=0;
1217 s->session->compress_meth=(comp == NULL)?0:comp->id;
1219 if (s->session->ciphers != NULL)
1220 sk_SSL_CIPHER_free(s->session->ciphers);
1221 s->session->ciphers=ciphers;
1222 if (ciphers == NULL)
1224 al=SSL_AD_ILLEGAL_PARAMETER;
1225 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED);
1229 c=ssl3_choose_cipher(s,s->session->ciphers,
1230 SSL_get_ciphers(s));
1234 al=SSL_AD_HANDSHAKE_FAILURE;
1235 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
1238 s->s3->tmp.new_cipher=c;
1242 /* Session-id reuse */
1243 #ifdef REUSE_CIPHER_BUG
1244 STACK_OF(SSL_CIPHER) *sk;
1245 SSL_CIPHER *nc=NULL;
1246 SSL_CIPHER *ec=NULL;
1248 if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG)
1250 sk=s->session->ciphers;
1251 for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
1253 c=sk_SSL_CIPHER_value(sk,i);
1254 if (c->algorithm_enc & SSL_eNULL)
1256 if (SSL_C_IS_EXPORT(c))
1260 s->s3->tmp.new_cipher=nc;
1261 else if (ec != NULL)
1262 s->s3->tmp.new_cipher=ec;
1264 s->s3->tmp.new_cipher=s->session->cipher;
1268 s->s3->tmp.new_cipher=s->session->cipher;
1271 if (!ssl3_digest_cached_records(s))
1274 /* we now have the following setup.
1276 * cipher_list - our prefered list of ciphers
1277 * ciphers - the clients prefered list of ciphers
1278 * compression - basically ignored right now
1279 * ssl version is set - sslv3
1280 * s->session - The ssl session has been setup.
1281 * s->hit - session reuse flag
1282 * s->tmp.new_cipher - the new cipher to use.
1285 /* Handles TLS extensions that we couldn't check earlier */
1286 if (s->version >= SSL3_VERSION)
1288 if (ssl_check_clienthello_tlsext_late(s) <= 0)
1290 SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
1299 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1302 if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers);
1306 int ssl3_send_server_hello(SSL *s)
1309 unsigned char *p,*d;
1312 #ifdef OPENSSL_NO_TLSEXT
1316 if (s->state == SSL3_ST_SW_SRVR_HELLO_A)
1318 buf=(unsigned char *)s->init_buf->data;
1319 #ifdef OPENSSL_NO_TLSEXT
1320 p=s->s3->server_random;
1321 /* Generate server_random if it was not needed previously */
1322 Time=(unsigned long)time(NULL); /* Time */
1324 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
1327 /* Do the message type and length last */
1330 *(p++)=s->version>>8;
1331 *(p++)=s->version&0xff;
1334 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
1335 p+=SSL3_RANDOM_SIZE;
1337 /* now in theory we have 3 options to sending back the
1338 * session id. If it is a re-use, we send back the
1339 * old session-id, if it is a new session, we send
1340 * back the new session-id or we send back a 0 length
1341 * session-id if we want it to be single use.
1342 * Currently I will not implement the '0' length session-id
1343 * 12-Jan-98 - I'll now support the '0' length stuff.
1345 * We also have an additional case where stateless session
1346 * resumption is successful: we always send back the old
1347 * session id. In this case s->hit is non zero: this can
1348 * only happen if stateless session resumption is succesful
1349 * if session caching is disabled so existing functionality
1352 if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)
1354 s->session->session_id_length=0;
1356 sl=s->session->session_id_length;
1357 if (sl > (int)sizeof(s->session->session_id))
1359 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
1363 memcpy(p,s->session->session_id,sl);
1366 /* put the cipher */
1367 i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p);
1370 /* put the compression method */
1371 #ifdef OPENSSL_NO_COMP
1374 if (s->s3->tmp.new_compression == NULL)
1377 *(p++)=s->s3->tmp.new_compression->id;
1379 #ifndef OPENSSL_NO_TLSEXT
1380 if (ssl_prepare_serverhello_tlsext(s) <= 0)
1382 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1385 if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
1387 SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR);
1394 *(d++)=SSL3_MT_SERVER_HELLO;
1397 s->state=SSL3_ST_SW_SRVR_HELLO_B;
1398 /* number of bytes to write */
1403 /* SSL3_ST_SW_SRVR_HELLO_B */
1404 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1407 int ssl3_send_server_done(SSL *s)
1411 if (s->state == SSL3_ST_SW_SRVR_DONE_A)
1413 p=(unsigned char *)s->init_buf->data;
1416 *(p++)=SSL3_MT_SERVER_DONE;
1421 s->state=SSL3_ST_SW_SRVR_DONE_B;
1422 /* number of bytes to write */
1427 /* SSL3_ST_SW_SRVR_DONE_B */
1428 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1431 int ssl3_send_server_key_exchange(SSL *s)
1433 #ifndef OPENSSL_NO_RSA
1437 unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
1440 #ifndef OPENSSL_NO_DH
1443 #ifndef OPENSSL_NO_ECDH
1444 EC_KEY *ecdh=NULL, *ecdhp;
1445 unsigned char *encodedPoint = NULL;
1448 BN_CTX *bn_ctx = NULL;
1451 unsigned char *p,*d;
1461 EVP_MD_CTX_init(&md_ctx);
1462 if (s->state == SSL3_ST_SW_KEY_EXCH_A)
1464 type=s->s3->tmp.new_cipher->algorithm_mkey;
1469 r[0]=r[1]=r[2]=r[3]=NULL;
1471 #ifndef OPENSSL_NO_RSA
1472 if (type & SSL_kRSA)
1475 if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL))
1477 rsa=s->cert->rsa_tmp_cb(s,
1478 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1479 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1482 al=SSL_AD_HANDSHAKE_FAILURE;
1483 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY);
1491 al=SSL_AD_HANDSHAKE_FAILURE;
1492 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY);
1497 s->s3->tmp.use_rsa_tmp=1;
1501 #ifndef OPENSSL_NO_DH
1502 if (type & SSL_kEDH)
1505 if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL))
1506 dhp=s->cert->dh_tmp_cb(s,
1507 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1508 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1511 al=SSL_AD_HANDSHAKE_FAILURE;
1512 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
1516 if (s->s3->tmp.dh != NULL)
1518 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1522 if ((dh=DHparams_dup(dhp)) == NULL)
1524 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1529 if ((dhp->pub_key == NULL ||
1530 dhp->priv_key == NULL ||
1531 (s->options & SSL_OP_SINGLE_DH_USE)))
1533 if(!DH_generate_key(dh))
1535 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,
1542 dh->pub_key=BN_dup(dhp->pub_key);
1543 dh->priv_key=BN_dup(dhp->priv_key);
1544 if ((dh->pub_key == NULL) ||
1545 (dh->priv_key == NULL))
1547 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB);
1557 #ifndef OPENSSL_NO_ECDH
1558 if (type & SSL_kEECDH)
1560 const EC_GROUP *group;
1562 ecdhp=cert->ecdh_tmp;
1563 if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL))
1565 ecdhp=s->cert->ecdh_tmp_cb(s,
1566 SSL_C_IS_EXPORT(s->s3->tmp.new_cipher),
1567 SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher));
1571 al=SSL_AD_HANDSHAKE_FAILURE;
1572 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
1576 if (s->s3->tmp.ecdh != NULL)
1578 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
1582 /* Duplicate the ECDH structure. */
1585 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1588 if ((ecdh = EC_KEY_dup(ecdhp)) == NULL)
1590 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1594 s->s3->tmp.ecdh=ecdh;
1595 if ((EC_KEY_get0_public_key(ecdh) == NULL) ||
1596 (EC_KEY_get0_private_key(ecdh) == NULL) ||
1597 (s->options & SSL_OP_SINGLE_ECDH_USE))
1599 if(!EC_KEY_generate_key(ecdh))
1601 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1606 if (((group = EC_KEY_get0_group(ecdh)) == NULL) ||
1607 (EC_KEY_get0_public_key(ecdh) == NULL) ||
1608 (EC_KEY_get0_private_key(ecdh) == NULL))
1610 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1614 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1615 (EC_GROUP_get_degree(group) > 163))
1617 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1621 /* XXX: For now, we only support ephemeral ECDH
1622 * keys over named (not generic) curves. For
1623 * supported named curves, curve_id is non-zero.
1626 tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group)))
1629 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE);
1633 /* Encode the public key.
1634 * First check the size of encoding and
1635 * allocate memory accordingly.
1637 encodedlen = EC_POINT_point2oct(group,
1638 EC_KEY_get0_public_key(ecdh),
1639 POINT_CONVERSION_UNCOMPRESSED,
1642 encodedPoint = (unsigned char *)
1643 OPENSSL_malloc(encodedlen*sizeof(unsigned char));
1644 bn_ctx = BN_CTX_new();
1645 if ((encodedPoint == NULL) || (bn_ctx == NULL))
1647 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1652 encodedlen = EC_POINT_point2oct(group,
1653 EC_KEY_get0_public_key(ecdh),
1654 POINT_CONVERSION_UNCOMPRESSED,
1655 encodedPoint, encodedlen, bn_ctx);
1657 if (encodedlen == 0)
1659 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB);
1663 BN_CTX_free(bn_ctx); bn_ctx=NULL;
1665 /* XXX: For now, we only support named (not
1666 * generic) curves in ECDH ephemeral key exchanges.
1667 * In this situation, we need four additional bytes
1668 * to encode the entire ServerECDHParams
1673 /* We'll generate the serverKeyExchange message
1674 * explicitly so we can set these to NULLs
1682 #endif /* !OPENSSL_NO_ECDH */
1683 #ifndef OPENSSL_NO_PSK
1684 if (type & SSL_kPSK)
1686 /* reserve size for record length and PSK identity hint*/
1687 n+=2+strlen(s->ctx->psk_identity_hint);
1690 #endif /* !OPENSSL_NO_PSK */
1692 al=SSL_AD_HANDSHAKE_FAILURE;
1693 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
1696 for (i=0; r[i] != NULL; i++)
1698 nr[i]=BN_num_bytes(r[i]);
1702 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1703 && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
1705 if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher))
1708 al=SSL_AD_DECODE_ERROR;
1711 kn=EVP_PKEY_size(pkey);
1719 if (!BUF_MEM_grow_clean(buf,n+4+kn))
1721 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF);
1724 d=(unsigned char *)s->init_buf->data;
1727 for (i=0; r[i] != NULL; i++)
1734 #ifndef OPENSSL_NO_ECDH
1735 if (type & SSL_kEECDH)
1737 /* XXX: For now, we only support named (not generic) curves.
1738 * In this situation, the serverKeyExchange message has:
1739 * [1 byte CurveType], [2 byte CurveName]
1740 * [1 byte length of encoded point], followed by
1741 * the actual encoded point itself
1743 *p = NAMED_CURVE_TYPE;
1751 memcpy((unsigned char*)p,
1752 (unsigned char *)encodedPoint,
1754 OPENSSL_free(encodedPoint);
1755 encodedPoint = NULL;
1760 #ifndef OPENSSL_NO_PSK
1761 if (type & SSL_kPSK)
1763 /* copy PSK identity hint */
1764 s2n(strlen(s->ctx->psk_identity_hint), p);
1765 strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint));
1766 p+=strlen(s->ctx->psk_identity_hint);
1773 /* n is the length of the params, they start at &(d[4])
1774 * and p points to the space at the end. */
1775 #ifndef OPENSSL_NO_RSA
1776 if (pkey->type == EVP_PKEY_RSA)
1780 for (num=2; num > 0; num--)
1782 EVP_DigestInit_ex(&md_ctx,(num == 2)
1783 ?s->ctx->md5:s->ctx->sha1, NULL);
1784 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1785 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1786 EVP_DigestUpdate(&md_ctx,&(d[4]),n);
1787 EVP_DigestFinal_ex(&md_ctx,q,
1788 (unsigned int *)&i);
1792 if (RSA_sign(NID_md5_sha1, md_buf, j,
1793 &(p[2]), &u, pkey->pkey.rsa) <= 0)
1795 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA);
1803 #if !defined(OPENSSL_NO_DSA)
1804 if (pkey->type == EVP_PKEY_DSA)
1807 EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL);
1808 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1809 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1810 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1811 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1812 (unsigned int *)&i,pkey))
1814 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA);
1822 #if !defined(OPENSSL_NO_ECDSA)
1823 if (pkey->type == EVP_PKEY_EC)
1825 /* let's do ECDSA */
1826 EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL);
1827 EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1828 EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1829 EVP_SignUpdate(&md_ctx,&(d[4]),n);
1830 if (!EVP_SignFinal(&md_ctx,&(p[2]),
1831 (unsigned int *)&i,pkey))
1833 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA);
1842 /* Is this error check actually needed? */
1843 al=SSL_AD_HANDSHAKE_FAILURE;
1844 SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE);
1849 *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE;
1852 /* we should now have things packed up, so lets send
1858 s->state = SSL3_ST_SW_KEY_EXCH_B;
1859 EVP_MD_CTX_cleanup(&md_ctx);
1860 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1862 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1864 #ifndef OPENSSL_NO_ECDH
1865 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
1866 BN_CTX_free(bn_ctx);
1868 EVP_MD_CTX_cleanup(&md_ctx);
1872 int ssl3_send_certificate_request(SSL *s)
1874 unsigned char *p,*d;
1876 STACK_OF(X509_NAME) *sk=NULL;
1880 if (s->state == SSL3_ST_SW_CERT_REQ_A)
1884 d=p=(unsigned char *)&(buf->data[4]);
1886 /* get the list of acceptable cert types */
1888 n=ssl3_get_req_cert_type(s,p);
1897 sk=SSL_get_client_CA_list(s);
1901 for (i=0; i<sk_X509_NAME_num(sk); i++)
1903 name=sk_X509_NAME_value(sk,i);
1904 j=i2d_X509_NAME(name,NULL);
1905 if (!BUF_MEM_grow_clean(buf,4+n+j+2))
1907 SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB);
1910 p=(unsigned char *)&(buf->data[4+n]);
1911 if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1914 i2d_X509_NAME(name,&p);
1921 i2d_X509_NAME(name,&p);
1922 j-=2; s2n(j,d); j+=2;
1928 /* else no CA names */
1929 p=(unsigned char *)&(buf->data[4+off]);
1932 d=(unsigned char *)buf->data;
1933 *(d++)=SSL3_MT_CERTIFICATE_REQUEST;
1936 /* we should now have things packed up, so lets send
1941 #ifdef NETSCAPE_HANG_BUG
1942 p=(unsigned char *)s->init_buf->data + s->init_num;
1945 *(p++)=SSL3_MT_SERVER_DONE;
1952 s->state = SSL3_ST_SW_CERT_REQ_B;
1955 /* SSL3_ST_SW_CERT_REQ_B */
1956 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
1961 int ssl3_get_client_key_exchange(SSL *s)
1965 unsigned long alg_k;
1967 #ifndef OPENSSL_NO_RSA
1969 EVP_PKEY *pkey=NULL;
1971 #ifndef OPENSSL_NO_DH
1975 #ifndef OPENSSL_NO_KRB5
1977 #endif /* OPENSSL_NO_KRB5 */
1979 #ifndef OPENSSL_NO_ECDH
1980 EC_KEY *srvr_ecdh = NULL;
1981 EVP_PKEY *clnt_pub_pkey = NULL;
1982 EC_POINT *clnt_ecpoint = NULL;
1983 BN_CTX *bn_ctx = NULL;
1986 n=s->method->ssl_get_message(s,
1987 SSL3_ST_SR_KEY_EXCH_A,
1988 SSL3_ST_SR_KEY_EXCH_B,
1989 SSL3_MT_CLIENT_KEY_EXCHANGE,
1993 if (!ok) return((int)n);
1994 p=(unsigned char *)s->init_msg;
1996 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1998 #ifndef OPENSSL_NO_RSA
1999 if (alg_k & SSL_kRSA)
2001 /* FIX THIS UP EAY EAY EAY EAY */
2002 if (s->s3->tmp.use_rsa_tmp)
2004 if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
2005 rsa=s->cert->rsa_tmp;
2006 /* Don't do a callback because rsa_tmp should
2007 * be sent already */
2010 al=SSL_AD_HANDSHAKE_FAILURE;
2011 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY);
2018 pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey;
2019 if ( (pkey == NULL) ||
2020 (pkey->type != EVP_PKEY_RSA) ||
2021 (pkey->pkey.rsa == NULL))
2023 al=SSL_AD_HANDSHAKE_FAILURE;
2024 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE);
2030 /* TLS and [incidentally] DTLS{0xFEFF} */
2031 if (s->version > SSL3_VERSION && s->version != DTLS1_BAD_VER)
2036 if (!(s->options & SSL_OP_TLS_D5_BUG))
2038 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG);
2048 i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING);
2052 if (i != SSL_MAX_MASTER_KEY_LENGTH)
2054 al=SSL_AD_DECODE_ERROR;
2055 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */
2058 if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff))))
2060 /* The premaster secret must contain the same version number as the
2061 * ClientHello to detect version rollback attacks (strangely, the
2062 * protocol does not offer such protection for DH ciphersuites).
2063 * However, buggy clients exist that send the negotiated protocol
2064 * version instead if the server does not support the requested
2066 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */
2067 if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) &&
2068 (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff))))
2070 al=SSL_AD_DECODE_ERROR;
2071 /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */
2073 /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack
2074 * (http://eprint.iacr.org/2003/052/) exploits the version
2075 * number check as a "bad version oracle" -- an alert would
2076 * reveal that the plaintext corresponding to some ciphertext
2077 * made up by the adversary is properly formatted except
2078 * that the version number is wrong. To avoid such attacks,
2079 * we should treat this just like any other decryption error. */
2085 /* Some decryption failure -- use random value instead as countermeasure
2086 * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding
2087 * (see RFC 2246, section 7.4.7.1). */
2089 i = SSL_MAX_MASTER_KEY_LENGTH;
2090 p[0] = s->client_version >> 8;
2091 p[1] = s->client_version & 0xff;
2092 if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */
2096 s->session->master_key_length=
2097 s->method->ssl3_enc->generate_master_secret(s,
2098 s->session->master_key,
2100 OPENSSL_cleanse(p,i);
2104 #ifndef OPENSSL_NO_DH
2105 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2110 if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG))
2112 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG);
2122 if (n == 0L) /* the parameters are in the cert */
2124 al=SSL_AD_HANDSHAKE_FAILURE;
2125 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS);
2130 if (s->s3->tmp.dh == NULL)
2132 al=SSL_AD_HANDSHAKE_FAILURE;
2133 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY);
2137 dh_srvr=s->s3->tmp.dh;
2140 pub=BN_bin2bn(p,i,NULL);
2143 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB);
2147 i=DH_compute_key(p,pub,dh_srvr);
2151 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2156 DH_free(s->s3->tmp.dh);
2161 s->session->master_key_length=
2162 s->method->ssl3_enc->generate_master_secret(s,
2163 s->session->master_key,p,i);
2164 OPENSSL_cleanse(p,i);
2168 #ifndef OPENSSL_NO_KRB5
2169 if (alg_k & SSL_kKRB5)
2171 krb5_error_code krb5rc;
2172 krb5_data enc_ticket;
2173 krb5_data authenticator;
2175 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2176 EVP_CIPHER_CTX ciph_ctx;
2177 const EVP_CIPHER *enc = NULL;
2178 unsigned char iv[EVP_MAX_IV_LENGTH];
2179 unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH
2180 + EVP_MAX_BLOCK_LENGTH];
2182 krb5_timestamp authtime = 0;
2183 krb5_ticket_times ttimes;
2185 EVP_CIPHER_CTX_init(&ciph_ctx);
2187 if (!kssl_ctx) kssl_ctx = kssl_ctx_new();
2190 enc_ticket.length = i;
2192 if (n < (long)(enc_ticket.length + 6))
2194 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2195 SSL_R_DATA_LENGTH_TOO_LONG);
2199 enc_ticket.data = (char *)p;
2200 p+=enc_ticket.length;
2203 authenticator.length = i;
2205 if (n < (long)(enc_ticket.length + authenticator.length + 6))
2207 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2208 SSL_R_DATA_LENGTH_TOO_LONG);
2212 authenticator.data = (char *)p;
2213 p+=authenticator.length;
2217 enc_pms.data = (char *)p;
2220 /* Note that the length is checked again below,
2223 if(enc_pms.length > sizeof pms)
2225 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2226 SSL_R_DATA_LENGTH_TOO_LONG);
2230 if (n != (long)(enc_ticket.length + authenticator.length +
2231 enc_pms.length + 6))
2233 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2234 SSL_R_DATA_LENGTH_TOO_LONG);
2238 if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes,
2242 printf("kssl_sget_tkt rtn %d [%d]\n",
2243 krb5rc, kssl_err.reason);
2245 printf("kssl_err text= %s\n", kssl_err.text);
2246 #endif /* KSSL_DEBUG */
2247 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2252 /* Note: no authenticator is not considered an error,
2253 ** but will return authtime == 0.
2255 if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator,
2256 &authtime, &kssl_err)) != 0)
2259 printf("kssl_check_authent rtn %d [%d]\n",
2260 krb5rc, kssl_err.reason);
2262 printf("kssl_err text= %s\n", kssl_err.text);
2263 #endif /* KSSL_DEBUG */
2264 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2269 if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0)
2271 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc);
2276 kssl_ctx_show(kssl_ctx);
2277 #endif /* KSSL_DEBUG */
2279 enc = kssl_map_enc(kssl_ctx->enctype);
2283 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2285 if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv))
2287 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2288 SSL_R_DECRYPTION_FAILED);
2291 if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl,
2292 (unsigned char *)enc_pms.data, enc_pms.length))
2294 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2295 SSL_R_DECRYPTION_FAILED);
2298 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2300 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2301 SSL_R_DATA_LENGTH_TOO_LONG);
2304 if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl))
2306 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2307 SSL_R_DECRYPTION_FAILED);
2311 if (outl > SSL_MAX_MASTER_KEY_LENGTH)
2313 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2314 SSL_R_DATA_LENGTH_TOO_LONG);
2317 if (!((pms[0] == (s->client_version>>8)) && (pms[1] == (s->client_version & 0xff))))
2319 /* The premaster secret must contain the same version number as the
2320 * ClientHello to detect version rollback attacks (strangely, the
2321 * protocol does not offer such protection for DH ciphersuites).
2322 * However, buggy clients exist that send random bytes instead of
2323 * the protocol version.
2324 * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients.
2325 * (Perhaps we should have a separate BUG value for the Kerberos cipher)
2327 if (!(s->options & SSL_OP_TLS_ROLLBACK_BUG))
2329 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2330 SSL_AD_DECODE_ERROR);
2335 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2337 s->session->master_key_length=
2338 s->method->ssl3_enc->generate_master_secret(s,
2339 s->session->master_key, pms, outl);
2341 if (kssl_ctx->client_princ)
2343 size_t len = strlen(kssl_ctx->client_princ);
2344 if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH )
2346 s->session->krb5_client_princ_len = len;
2347 memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len);
2352 /* Was doing kssl_ctx_free() here,
2353 ** but it caused problems for apache.
2354 ** kssl_ctx = kssl_ctx_free(kssl_ctx);
2355 ** if (s->kssl_ctx) s->kssl_ctx = NULL;
2359 #endif /* OPENSSL_NO_KRB5 */
2361 #ifndef OPENSSL_NO_ECDH
2362 if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2367 const EC_GROUP *group;
2368 const BIGNUM *priv_key;
2370 /* initialize structures for server's ECDH key pair */
2371 if ((srvr_ecdh = EC_KEY_new()) == NULL)
2373 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2374 ERR_R_MALLOC_FAILURE);
2378 /* Let's get server private key and group information */
2379 if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2381 /* use the certificate */
2382 tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec;
2386 /* use the ephermeral values we saved when
2387 * generating the ServerKeyExchange msg.
2389 tkey = s->s3->tmp.ecdh;
2392 group = EC_KEY_get0_group(tkey);
2393 priv_key = EC_KEY_get0_private_key(tkey);
2395 if (!EC_KEY_set_group(srvr_ecdh, group) ||
2396 !EC_KEY_set_private_key(srvr_ecdh, priv_key))
2398 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2403 /* Let's get client's public key */
2404 if ((clnt_ecpoint = EC_POINT_new(group)) == NULL)
2406 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2407 ERR_R_MALLOC_FAILURE);
2413 /* Client Publickey was in Client Certificate */
2415 if (alg_k & SSL_kEECDH)
2417 al=SSL_AD_HANDSHAKE_FAILURE;
2418 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY);
2421 if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer))
2423 (clnt_pub_pkey->type != EVP_PKEY_EC))
2425 /* XXX: For now, we do not support client
2426 * authentication using ECDH certificates
2427 * so this branch (n == 0L) of the code is
2428 * never executed. When that support is
2429 * added, we ought to ensure the key
2430 * received in the certificate is
2431 * authorized for key agreement.
2432 * ECDH_compute_key implicitly checks that
2433 * the two ECDH shares are for the same
2436 al=SSL_AD_HANDSHAKE_FAILURE;
2437 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2438 SSL_R_UNABLE_TO_DECODE_ECDH_CERTS);
2442 if (EC_POINT_copy(clnt_ecpoint,
2443 EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0)
2445 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2449 ret = 2; /* Skip certificate verify processing */
2453 /* Get client's public key from encoded point
2454 * in the ClientKeyExchange message.
2456 if ((bn_ctx = BN_CTX_new()) == NULL)
2458 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2459 ERR_R_MALLOC_FAILURE);
2463 /* Get encoded point length */
2468 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2472 if (EC_POINT_oct2point(group,
2473 clnt_ecpoint, p, i, bn_ctx) == 0)
2475 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2479 /* p is pointing to somewhere in the buffer
2480 * currently, so set it to the start
2482 p=(unsigned char *)s->init_buf->data;
2485 /* Compute the shared pre-master secret */
2486 field_size = EC_GROUP_get_degree(group);
2487 if (field_size <= 0)
2489 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2493 i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL);
2496 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2501 EVP_PKEY_free(clnt_pub_pkey);
2502 EC_POINT_free(clnt_ecpoint);
2503 EC_KEY_free(srvr_ecdh);
2504 BN_CTX_free(bn_ctx);
2505 EC_KEY_free(s->s3->tmp.ecdh);
2506 s->s3->tmp.ecdh = NULL;
2508 /* Compute the master secret */
2509 s->session->master_key_length = s->method->ssl3_enc-> \
2510 generate_master_secret(s, s->session->master_key, p, i);
2512 OPENSSL_cleanse(p, i);
2517 #ifndef OPENSSL_NO_PSK
2518 if (alg_k & SSL_kPSK)
2520 unsigned char *t = NULL;
2521 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2522 unsigned int pre_ms_len = 0, psk_len = 0;
2524 char tmp_id[PSK_MAX_IDENTITY_LEN+1];
2526 al=SSL_AD_HANDSHAKE_FAILURE;
2531 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2532 SSL_R_LENGTH_MISMATCH);
2535 if (i > PSK_MAX_IDENTITY_LEN)
2537 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2538 SSL_R_DATA_LENGTH_TOO_LONG);
2541 if (s->psk_server_callback == NULL)
2543 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2544 SSL_R_PSK_NO_SERVER_CB);
2548 /* Create guaranteed NULL-terminated identity
2549 * string for the callback */
2550 memcpy(tmp_id, p, i);
2551 memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
2552 psk_len = s->psk_server_callback(s, tmp_id,
2553 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2554 OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1);
2556 if (psk_len > PSK_MAX_PSK_LEN)
2558 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2559 ERR_R_INTERNAL_ERROR);
2562 else if (psk_len == 0)
2564 /* PSK related to the given identity not found */
2565 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2566 SSL_R_PSK_IDENTITY_NOT_FOUND);
2567 al=SSL_AD_UNKNOWN_PSK_IDENTITY;
2571 /* create PSK pre_master_secret */
2572 pre_ms_len=2+psk_len+2+psk_len;
2574 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2576 memset(t, 0, psk_len);
2580 if (s->session->psk_identity != NULL)
2581 OPENSSL_free(s->session->psk_identity);
2582 s->session->psk_identity = BUF_strdup((char *)p);
2583 if (s->session->psk_identity == NULL)
2585 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2586 ERR_R_MALLOC_FAILURE);
2590 if (s->session->psk_identity_hint != NULL)
2591 OPENSSL_free(s->session->psk_identity_hint);
2592 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2593 if (s->ctx->psk_identity_hint != NULL &&
2594 s->session->psk_identity_hint == NULL)
2596 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2597 ERR_R_MALLOC_FAILURE);
2601 s->session->master_key_length=
2602 s->method->ssl3_enc->generate_master_secret(s,
2603 s->session->master_key, psk_or_pre_ms, pre_ms_len);
2606 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2612 if (alg_k & SSL_kGOST)
2615 EVP_PKEY_CTX *pkey_ctx;
2616 EVP_PKEY *client_pub_pkey = NULL, *pk = NULL;
2617 unsigned char premaster_secret[32], *start;
2618 size_t outlen=32, inlen;
2619 unsigned long alg_a;
2621 /* Get our certificate private key*/
2622 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2623 if (alg_a & SSL_aGOST94)
2624 pk = s->cert->pkeys[SSL_PKEY_GOST94].privatekey;
2625 else if (alg_a & SSL_aGOST01)
2626 pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey;
2628 pkey_ctx = EVP_PKEY_CTX_new(pk,NULL);
2629 EVP_PKEY_decrypt_init(pkey_ctx);
2630 /* If client certificate is present and is of the same type, maybe
2631 * use it for key exchange. Don't mind errors from
2632 * EVP_PKEY_derive_set_peer, because it is completely valid to use
2633 * a client certificate for authorization only. */
2634 client_pub_pkey = X509_get_pubkey(s->session->peer);
2635 if (client_pub_pkey)
2637 if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0)
2640 /* Decrypt session key */
2641 if ((*p!=( V_ASN1_SEQUENCE| V_ASN1_CONSTRUCTED)))
2643 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED);
2651 else if (p[1] < 0x80)
2658 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED);
2661 if (EVP_PKEY_decrypt(pkey_ctx,premaster_secret,&outlen,start,inlen) <=0)
2664 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED);
2667 /* Generate master secret */
2668 s->session->master_key_length=
2669 s->method->ssl3_enc->generate_master_secret(s,
2670 s->session->master_key,premaster_secret,32);
2671 /* Check if pubkey from client certificate was used */
2672 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2677 EVP_PKEY_free(client_pub_pkey);
2678 EVP_PKEY_CTX_free(pkey_ctx);
2686 al=SSL_AD_HANDSHAKE_FAILURE;
2687 SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,
2688 SSL_R_UNKNOWN_CIPHER_TYPE);
2694 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2695 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH)
2698 #ifndef OPENSSL_NO_ECDH
2699 EVP_PKEY_free(clnt_pub_pkey);
2700 EC_POINT_free(clnt_ecpoint);
2701 if (srvr_ecdh != NULL)
2702 EC_KEY_free(srvr_ecdh);
2703 BN_CTX_free(bn_ctx);
2708 int ssl3_get_cert_verify(SSL *s)
2710 EVP_PKEY *pkey=NULL;
2717 n=s->method->ssl_get_message(s,
2718 SSL3_ST_SR_CERT_VRFY_A,
2719 SSL3_ST_SR_CERT_VRFY_B,
2724 if (!ok) return((int)n);
2726 if (s->session->peer != NULL)
2728 peer=s->session->peer;
2729 pkey=X509_get_pubkey(peer);
2730 type=X509_certificate_type(peer,pkey);
2738 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY)
2740 s->s3->tmp.reuse_message=1;
2741 if ((peer != NULL) && (type & EVP_PKT_SIGN))
2743 al=SSL_AD_UNEXPECTED_MESSAGE;
2744 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE);
2753 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED);
2754 al=SSL_AD_UNEXPECTED_MESSAGE;
2758 if (!(type & EVP_PKT_SIGN))
2760 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
2761 al=SSL_AD_ILLEGAL_PARAMETER;
2765 if (s->s3->change_cipher_spec)
2767 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY);
2768 al=SSL_AD_UNEXPECTED_MESSAGE;
2772 /* we now have a signature that we need to verify */
2773 p=(unsigned char *)s->init_msg;
2774 /* Check for broken implementations of GOST ciphersuites */
2775 /* If key is GOST and n is exactly 64, it is bare
2776 * signature without length field */
2777 if (n==64 && (pkey->type==NID_id_GostR3410_94 ||
2778 pkey->type == NID_id_GostR3410_2001) )
2788 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH);
2789 al=SSL_AD_DECODE_ERROR;
2793 j=EVP_PKEY_size(pkey);
2794 if ((i > j) || (n > j) || (n <= 0))
2796 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE);
2797 al=SSL_AD_DECODE_ERROR;
2801 #ifndef OPENSSL_NO_RSA
2802 if (pkey->type == EVP_PKEY_RSA)
2804 i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md,
2805 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i,
2809 al=SSL_AD_DECRYPT_ERROR;
2810 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT);
2815 al=SSL_AD_DECRYPT_ERROR;
2816 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE);
2822 #ifndef OPENSSL_NO_DSA
2823 if (pkey->type == EVP_PKEY_DSA)
2825 j=DSA_verify(pkey->save_type,
2826 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2827 SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa);
2831 al=SSL_AD_DECRYPT_ERROR;
2832 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE);
2838 #ifndef OPENSSL_NO_ECDSA
2839 if (pkey->type == EVP_PKEY_EC)
2841 j=ECDSA_verify(pkey->save_type,
2842 &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]),
2843 SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec);
2847 al=SSL_AD_DECRYPT_ERROR;
2848 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
2849 SSL_R_BAD_ECDSA_SIGNATURE);
2855 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
2856 { unsigned char signature[64];
2858 EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey,NULL);
2859 EVP_PKEY_verify_init(pctx);
2861 fprintf(stderr,"GOST signature length is %d",i);
2863 for (idx=0;idx<64;idx++) {
2864 signature[63-idx]=p[idx];
2866 j=EVP_PKEY_verify(pctx,signature,64,s->s3->tmp.cert_verify_md,32);
2867 EVP_PKEY_CTX_free(pctx);
2870 al=SSL_AD_DECRYPT_ERROR;
2871 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,
2872 SSL_R_BAD_ECDSA_SIGNATURE);
2878 SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR);
2879 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
2888 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2891 EVP_PKEY_free(pkey);
2895 int ssl3_get_client_certificate(SSL *s)
2897 int i,ok,al,ret= -1;
2899 unsigned long l,nc,llen,n;
2900 const unsigned char *p,*q;
2902 STACK_OF(X509) *sk=NULL;
2904 n=s->method->ssl_get_message(s,
2911 if (!ok) return((int)n);
2913 if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE)
2915 if ( (s->verify_mode & SSL_VERIFY_PEER) &&
2916 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2918 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
2919 al=SSL_AD_HANDSHAKE_FAILURE;
2922 /* If tls asked for a client cert, the client must return a 0 list */
2923 if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request)
2925 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST);
2926 al=SSL_AD_UNEXPECTED_MESSAGE;
2929 s->s3->tmp.reuse_message=1;
2933 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
2935 al=SSL_AD_UNEXPECTED_MESSAGE;
2936 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE);
2939 p=d=(unsigned char *)s->init_msg;
2941 if ((sk=sk_X509_new_null()) == NULL)
2943 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2950 al=SSL_AD_DECODE_ERROR;
2951 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
2954 for (nc=0; nc<llen; )
2957 if ((l+nc+3) > llen)
2959 al=SSL_AD_DECODE_ERROR;
2960 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2965 x=d2i_X509(NULL,&p,l);
2968 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB);
2973 al=SSL_AD_DECODE_ERROR;
2974 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
2977 if (!sk_X509_push(sk,x))
2979 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE);
2986 if (sk_X509_num(sk) <= 0)
2988 /* TLS does not mind 0 certs returned */
2989 if (s->version == SSL3_VERSION)
2991 al=SSL_AD_HANDSHAKE_FAILURE;
2992 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED);
2995 /* Fail for TLS only if we required a certificate */
2996 else if ((s->verify_mode & SSL_VERIFY_PEER) &&
2997 (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))
2999 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
3000 al=SSL_AD_HANDSHAKE_FAILURE;
3006 i=ssl_verify_cert_chain(s,sk);
3009 al=ssl_verify_alarm_type(s->verify_result);
3010 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED);
3015 if (s->session->peer != NULL) /* This should not be needed */
3016 X509_free(s->session->peer);
3017 s->session->peer=sk_X509_shift(sk);
3018 s->session->verify_result = s->verify_result;
3020 /* With the current implementation, sess_cert will always be NULL
3021 * when we arrive here. */
3022 if (s->session->sess_cert == NULL)
3024 s->session->sess_cert = ssl_sess_cert_new();
3025 if (s->session->sess_cert == NULL)
3027 SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
3031 if (s->session->sess_cert->cert_chain != NULL)
3032 sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
3033 s->session->sess_cert->cert_chain=sk;
3034 /* Inconsistency alert: cert_chain does *not* include the
3035 * peer's own certificate, while we do include it in s3_clnt.c */
3043 ssl3_send_alert(s,SSL3_AL_FATAL,al);
3046 if (x != NULL) X509_free(x);
3047 if (sk != NULL) sk_X509_pop_free(sk,X509_free);
3051 int ssl3_send_server_certificate(SSL *s)
3056 if (s->state == SSL3_ST_SW_CERT_A)
3058 x=ssl_get_server_send_cert(s);
3061 /* VRS: allow null cert if auth == KRB5 */
3062 if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) ||
3063 (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5))
3065 SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR);
3070 l=ssl3_output_cert_chain(s,x);
3071 s->state=SSL3_ST_SW_CERT_B;
3076 /* SSL3_ST_SW_CERT_B */
3077 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3079 #ifndef OPENSSL_NO_TLSEXT
3080 int ssl3_send_newsession_ticket(SSL *s)
3082 if (s->state == SSL3_ST_SW_SESSION_TICKET_A)
3084 unsigned char *p, *senc, *macstart;
3089 SSL_CTX *tctx = s->initial_ctx;
3090 unsigned char iv[EVP_MAX_IV_LENGTH];
3091 unsigned char key_name[16];
3093 /* get session encoding length */
3094 slen = i2d_SSL_SESSION(s->session, NULL);
3095 /* Some length values are 16 bits, so forget it if session is
3100 /* Grow buffer if need be: the length calculation is as
3101 * follows 1 (size of message name) + 3 (message length
3102 * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) +
3103 * 16 (key name) + max_iv_len (iv length) +
3104 * session_length + max_enc_block_size (max encrypted session
3105 * length) + max_md_size (HMAC).
3107 if (!BUF_MEM_grow(s->init_buf,
3108 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH +
3109 EVP_MAX_MD_SIZE + slen))
3111 senc = OPENSSL_malloc(slen);
3115 i2d_SSL_SESSION(s->session, &p);
3117 p=(unsigned char *)s->init_buf->data;
3119 *(p++)=SSL3_MT_NEWSESSION_TICKET;
3120 /* Skip message length for now */
3122 EVP_CIPHER_CTX_init(&ctx);
3123 HMAC_CTX_init(&hctx);
3124 /* Initialize HMAC and cipher contexts. If callback present
3125 * it does all the work otherwise use generated values
3128 if (tctx->tlsext_ticket_key_cb)
3130 if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
3139 RAND_pseudo_bytes(iv, 16);
3140 EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
3141 tctx->tlsext_tick_aes_key, iv);
3142 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
3143 tlsext_tick_md(), NULL);
3144 memcpy(key_name, tctx->tlsext_tick_key_name, 16);
3146 l2n(s->session->tlsext_tick_lifetime_hint, p);
3147 /* Skip ticket length for now */
3149 /* Output key name */
3151 memcpy(p, key_name, 16);
3154 memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
3155 p += EVP_CIPHER_CTX_iv_length(&ctx);
3156 /* Encrypt session data */
3157 EVP_EncryptUpdate(&ctx, p, &len, senc, slen);
3159 EVP_EncryptFinal(&ctx, p, &len);
3161 EVP_CIPHER_CTX_cleanup(&ctx);
3163 HMAC_Update(&hctx, macstart, p - macstart);
3164 HMAC_Final(&hctx, p, &hlen);
3165 HMAC_CTX_cleanup(&hctx);
3168 /* Now write out lengths: p points to end of data written */
3170 len = p - (unsigned char *)s->init_buf->data;
3171 p=(unsigned char *)s->init_buf->data + 1;
3172 l2n3(len - 4, p); /* Message length */
3174 s2n(len - 10, p); /* Ticket length */
3176 /* number of bytes to write */
3178 s->state=SSL3_ST_SW_SESSION_TICKET_B;
3183 /* SSL3_ST_SW_SESSION_TICKET_B */
3184 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3187 int ssl3_send_cert_status(SSL *s)
3189 if (s->state == SSL3_ST_SW_CERT_STATUS_A)
3192 /* Grow buffer if need be: the length calculation is as
3193 * follows 1 (message type) + 3 (message length) +
3194 * 1 (ocsp response type) + 3 (ocsp response length)
3197 if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen))
3200 p=(unsigned char *)s->init_buf->data;
3203 *(p++)=SSL3_MT_CERTIFICATE_STATUS;
3204 /* message length */
3205 l2n3(s->tlsext_ocsp_resplen + 4, p);
3207 *(p++)= s->tlsext_status_type;
3208 /* length of OCSP response */
3209 l2n3(s->tlsext_ocsp_resplen, p);
3210 /* actual response */
3211 memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen);
3212 /* number of bytes to write */
3213 s->init_num = 8 + s->tlsext_ocsp_resplen;
3214 s->state=SSL3_ST_SW_CERT_STATUS_B;
3218 /* SSL3_ST_SW_CERT_STATUS_B */
3219 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));