1714 lines
58 KiB
C
1714 lines
58 KiB
C
/* ssl/d1_clnt.c */
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/*
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* DTLS implementation written by Nagendra Modadugu
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* (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
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*/
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/* ====================================================================
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* Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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|
* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
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* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include "ssl_locl.h"
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#ifndef OPENSSL_NO_KRB5
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# include "kssl_lcl.h"
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#endif
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#include <openssl/buffer.h>
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#include <openssl/rand.h>
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include <openssl/md5.h>
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#include <openssl/bn.h>
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#ifndef OPENSSL_NO_DH
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# include <openssl/dh.h>
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#endif
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static const SSL_METHOD *dtls1_get_client_method(int ver);
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static int dtls1_get_hello_verify(SSL *s);
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static const SSL_METHOD *dtls1_get_client_method(int ver)
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{
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if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
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return (DTLSv1_client_method());
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else
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return (NULL);
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}
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IMPLEMENT_dtls1_meth_func(DTLSv1_client_method,
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ssl_undefined_function,
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dtls1_connect, dtls1_get_client_method)
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int dtls1_connect(SSL *s)
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{
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BUF_MEM *buf = NULL;
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unsigned long Time = (unsigned long)time(NULL);
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void (*cb) (const SSL *ssl, int type, int val) = NULL;
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int ret = -1;
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int new_state, state, skip = 0;
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#ifndef OPENSSL_NO_SCTP
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unsigned char sctpauthkey[64];
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char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
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#endif
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RAND_add(&Time, sizeof(Time), 0);
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ERR_clear_error();
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clear_sys_error();
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if (s->info_callback != NULL)
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cb = s->info_callback;
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else if (s->ctx->info_callback != NULL)
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cb = s->ctx->info_callback;
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s->in_handshake++;
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if (!SSL_in_init(s) || SSL_in_before(s))
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SSL_clear(s);
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#ifndef OPENSSL_NO_SCTP
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/*
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* Notify SCTP BIO socket to enter handshake mode and prevent stream
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* identifier other than 0. Will be ignored if no SCTP is used.
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*/
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BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
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s->in_handshake, NULL);
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#endif
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#ifndef OPENSSL_NO_HEARTBEATS
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/*
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* If we're awaiting a HeartbeatResponse, pretend we already got and
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* don't await it anymore, because Heartbeats don't make sense during
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* handshakes anyway.
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*/
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if (s->tlsext_hb_pending) {
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dtls1_stop_timer(s);
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s->tlsext_hb_pending = 0;
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s->tlsext_hb_seq++;
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}
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#endif
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for (;;) {
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state = s->state;
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switch (s->state) {
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case SSL_ST_RENEGOTIATE:
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s->renegotiate = 1;
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s->state = SSL_ST_CONNECT;
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s->ctx->stats.sess_connect_renegotiate++;
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/* break */
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case SSL_ST_BEFORE:
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case SSL_ST_CONNECT:
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case SSL_ST_BEFORE | SSL_ST_CONNECT:
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case SSL_ST_OK | SSL_ST_CONNECT:
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s->server = 0;
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if (cb != NULL)
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cb(s, SSL_CB_HANDSHAKE_START, 1);
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if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00) &&
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(s->version & 0xff00) != (DTLS1_BAD_VER & 0xff00)) {
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SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
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ret = -1;
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s->state = SSL_ST_ERR;
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goto end;
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}
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/* s->version=SSL3_VERSION; */
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s->type = SSL_ST_CONNECT;
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if (s->init_buf == NULL) {
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if ((buf = BUF_MEM_new()) == NULL) {
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ret = -1;
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s->state = SSL_ST_ERR;
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goto end;
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}
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if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
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ret = -1;
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s->state = SSL_ST_ERR;
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goto end;
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}
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s->init_buf = buf;
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buf = NULL;
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}
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if (!ssl3_setup_buffers(s)) {
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ret = -1;
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s->state = SSL_ST_ERR;
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goto end;
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}
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/* setup buffing BIO */
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if (!ssl_init_wbio_buffer(s, 0)) {
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ret = -1;
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s->state = SSL_ST_ERR;
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goto end;
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}
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/* don't push the buffering BIO quite yet */
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s->state = SSL3_ST_CW_CLNT_HELLO_A;
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s->ctx->stats.sess_connect++;
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s->init_num = 0;
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/* mark client_random uninitialized */
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memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
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s->d1->send_cookie = 0;
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s->hit = 0;
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s->d1->change_cipher_spec_ok = 0;
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/*
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* Should have been reset by ssl3_get_finished, too.
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*/
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s->s3->change_cipher_spec = 0;
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break;
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#ifndef OPENSSL_NO_SCTP
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case DTLS1_SCTP_ST_CR_READ_SOCK:
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if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
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s->s3->in_read_app_data = 2;
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s->rwstate = SSL_READING;
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BIO_clear_retry_flags(SSL_get_rbio(s));
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BIO_set_retry_read(SSL_get_rbio(s));
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ret = -1;
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goto end;
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}
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s->state = s->s3->tmp.next_state;
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break;
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case DTLS1_SCTP_ST_CW_WRITE_SOCK:
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/* read app data until dry event */
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ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
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if (ret < 0)
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goto end;
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if (ret == 0) {
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s->s3->in_read_app_data = 2;
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s->rwstate = SSL_READING;
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BIO_clear_retry_flags(SSL_get_rbio(s));
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BIO_set_retry_read(SSL_get_rbio(s));
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ret = -1;
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goto end;
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}
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s->state = s->d1->next_state;
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break;
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#endif
|
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case SSL3_ST_CW_CLNT_HELLO_A:
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s->shutdown = 0;
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|
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/* every DTLS ClientHello resets Finished MAC */
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ssl3_init_finished_mac(s);
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|
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case SSL3_ST_CW_CLNT_HELLO_B:
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dtls1_start_timer(s);
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ret = dtls1_client_hello(s);
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if (ret <= 0)
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goto end;
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if (s->d1->send_cookie) {
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s->state = SSL3_ST_CW_FLUSH;
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s->s3->tmp.next_state = SSL3_ST_CR_SRVR_HELLO_A;
|
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} else
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s->state = SSL3_ST_CR_SRVR_HELLO_A;
|
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|
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s->init_num = 0;
|
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|
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#ifndef OPENSSL_NO_SCTP
|
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/* Disable buffering for SCTP */
|
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if (!BIO_dgram_is_sctp(SSL_get_wbio(s))) {
|
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#endif
|
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/*
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* turn on buffering for the next lot of output
|
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*/
|
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if (s->bbio != s->wbio)
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s->wbio = BIO_push(s->bbio, s->wbio);
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#ifndef OPENSSL_NO_SCTP
|
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}
|
|
#endif
|
|
|
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break;
|
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|
|
case SSL3_ST_CR_SRVR_HELLO_A:
|
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case SSL3_ST_CR_SRVR_HELLO_B:
|
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ret = ssl3_get_server_hello(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
else {
|
|
if (s->hit) {
|
|
#ifndef OPENSSL_NO_SCTP
|
|
/*
|
|
* Add new shared key for SCTP-Auth, will be ignored if
|
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* no SCTP used.
|
|
*/
|
|
snprintf((char *)labelbuffer,
|
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sizeof(DTLS1_SCTP_AUTH_LABEL),
|
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DTLS1_SCTP_AUTH_LABEL);
|
|
|
|
if (SSL_export_keying_material(s, sctpauthkey,
|
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sizeof(sctpauthkey),
|
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labelbuffer,
|
|
sizeof(labelbuffer), NULL, 0,
|
|
0) <= 0) {
|
|
ret = -1;
|
|
s->state = SSL_ST_ERR;
|
|
goto end;
|
|
}
|
|
|
|
BIO_ctrl(SSL_get_wbio(s),
|
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BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
|
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sizeof(sctpauthkey), sctpauthkey);
|
|
#endif
|
|
|
|
s->state = SSL3_ST_CR_FINISHED_A;
|
|
if (s->tlsext_ticket_expected) {
|
|
/* receive renewed session ticket */
|
|
s->state = SSL3_ST_CR_SESSION_TICKET_A;
|
|
}
|
|
} else
|
|
s->state = DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
|
|
}
|
|
s->init_num = 0;
|
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break;
|
|
|
|
case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
|
|
case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
|
|
|
|
ret = dtls1_get_hello_verify(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
dtls1_stop_timer(s);
|
|
if (s->d1->send_cookie) /* start again, with a cookie */
|
|
s->state = SSL3_ST_CW_CLNT_HELLO_A;
|
|
else
|
|
s->state = SSL3_ST_CR_CERT_A;
|
|
s->init_num = 0;
|
|
break;
|
|
|
|
case SSL3_ST_CR_CERT_A:
|
|
case SSL3_ST_CR_CERT_B:
|
|
/* Check if it is anon DH or PSK */
|
|
if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
|
|
!(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
|
|
ret = ssl3_get_server_certificate(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
#ifndef OPENSSL_NO_TLSEXT
|
|
if (s->tlsext_status_expected)
|
|
s->state = SSL3_ST_CR_CERT_STATUS_A;
|
|
else
|
|
s->state = SSL3_ST_CR_KEY_EXCH_A;
|
|
} else {
|
|
skip = 1;
|
|
s->state = SSL3_ST_CR_KEY_EXCH_A;
|
|
}
|
|
#else
|
|
} else
|
|
skip = 1;
|
|
|
|
s->state = SSL3_ST_CR_KEY_EXCH_A;
|
|
#endif
|
|
s->init_num = 0;
|
|
break;
|
|
|
|
case SSL3_ST_CR_KEY_EXCH_A:
|
|
case SSL3_ST_CR_KEY_EXCH_B:
|
|
ret = ssl3_get_key_exchange(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
s->state = SSL3_ST_CR_CERT_REQ_A;
|
|
s->init_num = 0;
|
|
|
|
/*
|
|
* at this point we check that we have the required stuff from
|
|
* the server
|
|
*/
|
|
if (!ssl3_check_cert_and_algorithm(s)) {
|
|
ret = -1;
|
|
s->state = SSL_ST_ERR;
|
|
goto end;
|
|
}
|
|
break;
|
|
|
|
case SSL3_ST_CR_CERT_REQ_A:
|
|
case SSL3_ST_CR_CERT_REQ_B:
|
|
ret = ssl3_get_certificate_request(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
s->state = SSL3_ST_CR_SRVR_DONE_A;
|
|
s->init_num = 0;
|
|
break;
|
|
|
|
case SSL3_ST_CR_SRVR_DONE_A:
|
|
case SSL3_ST_CR_SRVR_DONE_B:
|
|
ret = ssl3_get_server_done(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
dtls1_stop_timer(s);
|
|
if (s->s3->tmp.cert_req)
|
|
s->s3->tmp.next_state = SSL3_ST_CW_CERT_A;
|
|
else
|
|
s->s3->tmp.next_state = SSL3_ST_CW_KEY_EXCH_A;
|
|
s->init_num = 0;
|
|
|
|
#ifndef OPENSSL_NO_SCTP
|
|
if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
|
|
state == SSL_ST_RENEGOTIATE)
|
|
s->state = DTLS1_SCTP_ST_CR_READ_SOCK;
|
|
else
|
|
#endif
|
|
s->state = s->s3->tmp.next_state;
|
|
break;
|
|
|
|
case SSL3_ST_CW_CERT_A:
|
|
case SSL3_ST_CW_CERT_B:
|
|
case SSL3_ST_CW_CERT_C:
|
|
case SSL3_ST_CW_CERT_D:
|
|
dtls1_start_timer(s);
|
|
ret = dtls1_send_client_certificate(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
s->state = SSL3_ST_CW_KEY_EXCH_A;
|
|
s->init_num = 0;
|
|
break;
|
|
|
|
case SSL3_ST_CW_KEY_EXCH_A:
|
|
case SSL3_ST_CW_KEY_EXCH_B:
|
|
dtls1_start_timer(s);
|
|
ret = dtls1_send_client_key_exchange(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
|
|
#ifndef OPENSSL_NO_SCTP
|
|
/*
|
|
* Add new shared key for SCTP-Auth, will be ignored if no SCTP
|
|
* used.
|
|
*/
|
|
snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
|
|
DTLS1_SCTP_AUTH_LABEL);
|
|
|
|
if (SSL_export_keying_material(s, sctpauthkey,
|
|
sizeof(sctpauthkey), labelbuffer,
|
|
sizeof(labelbuffer), NULL, 0, 0) <= 0) {
|
|
ret = -1;
|
|
s->state = SSL_ST_ERR;
|
|
goto end;
|
|
}
|
|
|
|
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
|
|
sizeof(sctpauthkey), sctpauthkey);
|
|
#endif
|
|
|
|
/*
|
|
* EAY EAY EAY need to check for DH fix cert sent back
|
|
*/
|
|
/*
|
|
* For TLS, cert_req is set to 2, so a cert chain of nothing is
|
|
* sent, but no verify packet is sent
|
|
*/
|
|
if (s->s3->tmp.cert_req == 1) {
|
|
s->state = SSL3_ST_CW_CERT_VRFY_A;
|
|
} else {
|
|
#ifndef OPENSSL_NO_SCTP
|
|
if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
|
|
s->d1->next_state = SSL3_ST_CW_CHANGE_A;
|
|
s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
|
|
} else
|
|
#endif
|
|
s->state = SSL3_ST_CW_CHANGE_A;
|
|
}
|
|
|
|
s->init_num = 0;
|
|
break;
|
|
|
|
case SSL3_ST_CW_CERT_VRFY_A:
|
|
case SSL3_ST_CW_CERT_VRFY_B:
|
|
dtls1_start_timer(s);
|
|
ret = dtls1_send_client_verify(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
#ifndef OPENSSL_NO_SCTP
|
|
if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
|
|
s->d1->next_state = SSL3_ST_CW_CHANGE_A;
|
|
s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
|
|
} else
|
|
#endif
|
|
s->state = SSL3_ST_CW_CHANGE_A;
|
|
s->init_num = 0;
|
|
break;
|
|
|
|
case SSL3_ST_CW_CHANGE_A:
|
|
case SSL3_ST_CW_CHANGE_B:
|
|
if (!s->hit)
|
|
dtls1_start_timer(s);
|
|
ret = dtls1_send_change_cipher_spec(s,
|
|
SSL3_ST_CW_CHANGE_A,
|
|
SSL3_ST_CW_CHANGE_B);
|
|
if (ret <= 0)
|
|
goto end;
|
|
|
|
s->state = SSL3_ST_CW_FINISHED_A;
|
|
s->init_num = 0;
|
|
|
|
s->session->cipher = s->s3->tmp.new_cipher;
|
|
#ifdef OPENSSL_NO_COMP
|
|
s->session->compress_meth = 0;
|
|
#else
|
|
if (s->s3->tmp.new_compression == NULL)
|
|
s->session->compress_meth = 0;
|
|
else
|
|
s->session->compress_meth = s->s3->tmp.new_compression->id;
|
|
#endif
|
|
if (!s->method->ssl3_enc->setup_key_block(s)) {
|
|
ret = -1;
|
|
s->state = SSL_ST_ERR;
|
|
goto end;
|
|
}
|
|
|
|
if (!s->method->ssl3_enc->change_cipher_state(s,
|
|
SSL3_CHANGE_CIPHER_CLIENT_WRITE))
|
|
{
|
|
ret = -1;
|
|
s->state = SSL_ST_ERR;
|
|
goto end;
|
|
}
|
|
#ifndef OPENSSL_NO_SCTP
|
|
if (s->hit) {
|
|
/*
|
|
* Change to new shared key of SCTP-Auth, will be ignored if
|
|
* no SCTP used.
|
|
*/
|
|
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
|
|
0, NULL);
|
|
}
|
|
#endif
|
|
|
|
dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
|
|
break;
|
|
|
|
case SSL3_ST_CW_FINISHED_A:
|
|
case SSL3_ST_CW_FINISHED_B:
|
|
if (!s->hit)
|
|
dtls1_start_timer(s);
|
|
ret = dtls1_send_finished(s,
|
|
SSL3_ST_CW_FINISHED_A,
|
|
SSL3_ST_CW_FINISHED_B,
|
|
s->method->
|
|
ssl3_enc->client_finished_label,
|
|
s->method->
|
|
ssl3_enc->client_finished_label_len);
|
|
if (ret <= 0)
|
|
goto end;
|
|
s->state = SSL3_ST_CW_FLUSH;
|
|
|
|
/* clear flags */
|
|
s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER;
|
|
if (s->hit) {
|
|
s->s3->tmp.next_state = SSL_ST_OK;
|
|
#ifndef OPENSSL_NO_SCTP
|
|
if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
|
|
s->d1->next_state = s->s3->tmp.next_state;
|
|
s->s3->tmp.next_state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
|
|
}
|
|
#endif
|
|
if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
|
|
s->state = SSL_ST_OK;
|
|
#ifndef OPENSSL_NO_SCTP
|
|
if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
|
|
s->d1->next_state = SSL_ST_OK;
|
|
s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
|
|
}
|
|
#endif
|
|
s->s3->flags |= SSL3_FLAGS_POP_BUFFER;
|
|
s->s3->delay_buf_pop_ret = 0;
|
|
}
|
|
} else {
|
|
#ifndef OPENSSL_NO_SCTP
|
|
/*
|
|
* Change to new shared key of SCTP-Auth, will be ignored if
|
|
* no SCTP used.
|
|
*/
|
|
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
|
|
0, NULL);
|
|
#endif
|
|
|
|
#ifndef OPENSSL_NO_TLSEXT
|
|
/*
|
|
* Allow NewSessionTicket if ticket expected
|
|
*/
|
|
if (s->tlsext_ticket_expected)
|
|
s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
|
|
else
|
|
#endif
|
|
|
|
s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A;
|
|
}
|
|
s->init_num = 0;
|
|
break;
|
|
|
|
#ifndef OPENSSL_NO_TLSEXT
|
|
case SSL3_ST_CR_SESSION_TICKET_A:
|
|
case SSL3_ST_CR_SESSION_TICKET_B:
|
|
ret = ssl3_get_new_session_ticket(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
s->state = SSL3_ST_CR_FINISHED_A;
|
|
s->init_num = 0;
|
|
break;
|
|
|
|
case SSL3_ST_CR_CERT_STATUS_A:
|
|
case SSL3_ST_CR_CERT_STATUS_B:
|
|
ret = ssl3_get_cert_status(s);
|
|
if (ret <= 0)
|
|
goto end;
|
|
s->state = SSL3_ST_CR_KEY_EXCH_A;
|
|
s->init_num = 0;
|
|
break;
|
|
#endif
|
|
|
|
case SSL3_ST_CR_FINISHED_A:
|
|
case SSL3_ST_CR_FINISHED_B:
|
|
s->d1->change_cipher_spec_ok = 1;
|
|
ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
|
|
SSL3_ST_CR_FINISHED_B);
|
|
if (ret <= 0)
|
|
goto end;
|
|
dtls1_stop_timer(s);
|
|
|
|
if (s->hit)
|
|
s->state = SSL3_ST_CW_CHANGE_A;
|
|
else
|
|
s->state = SSL_ST_OK;
|
|
|
|
#ifndef OPENSSL_NO_SCTP
|
|
if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
|
|
state == SSL_ST_RENEGOTIATE) {
|
|
s->d1->next_state = s->state;
|
|
s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
|
|
}
|
|
#endif
|
|
|
|
s->init_num = 0;
|
|
break;
|
|
|
|
case SSL3_ST_CW_FLUSH:
|
|
s->rwstate = SSL_WRITING;
|
|
if (BIO_flush(s->wbio) <= 0) {
|
|
/*
|
|
* If the write error was fatal, stop trying
|
|
*/
|
|
if (!BIO_should_retry(s->wbio)) {
|
|
s->rwstate = SSL_NOTHING;
|
|
s->state = s->s3->tmp.next_state;
|
|
}
|
|
|
|
ret = -1;
|
|
goto end;
|
|
}
|
|
s->rwstate = SSL_NOTHING;
|
|
s->state = s->s3->tmp.next_state;
|
|
break;
|
|
|
|
case SSL_ST_OK:
|
|
/* clean a few things up */
|
|
ssl3_cleanup_key_block(s);
|
|
|
|
#if 0
|
|
if (s->init_buf != NULL) {
|
|
BUF_MEM_free(s->init_buf);
|
|
s->init_buf = NULL;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* If we are not 'joining' the last two packets, remove the
|
|
* buffering now
|
|
*/
|
|
if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
|
|
ssl_free_wbio_buffer(s);
|
|
/* else do it later in ssl3_write */
|
|
|
|
s->init_num = 0;
|
|
s->renegotiate = 0;
|
|
s->new_session = 0;
|
|
|
|
ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
|
|
if (s->hit)
|
|
s->ctx->stats.sess_hit++;
|
|
|
|
ret = 1;
|
|
/* s->server=0; */
|
|
s->handshake_func = dtls1_connect;
|
|
s->ctx->stats.sess_connect_good++;
|
|
|
|
if (cb != NULL)
|
|
cb(s, SSL_CB_HANDSHAKE_DONE, 1);
|
|
|
|
/* done with handshaking */
|
|
s->d1->handshake_read_seq = 0;
|
|
s->d1->next_handshake_write_seq = 0;
|
|
goto end;
|
|
/* break; */
|
|
|
|
case SSL_ST_ERR:
|
|
default:
|
|
SSLerr(SSL_F_DTLS1_CONNECT, SSL_R_UNKNOWN_STATE);
|
|
ret = -1;
|
|
goto end;
|
|
/* break; */
|
|
}
|
|
|
|
/* did we do anything */
|
|
if (!s->s3->tmp.reuse_message && !skip) {
|
|
if (s->debug) {
|
|
if ((ret = BIO_flush(s->wbio)) <= 0)
|
|
goto end;
|
|
}
|
|
|
|
if ((cb != NULL) && (s->state != state)) {
|
|
new_state = s->state;
|
|
s->state = state;
|
|
cb(s, SSL_CB_CONNECT_LOOP, 1);
|
|
s->state = new_state;
|
|
}
|
|
}
|
|
skip = 0;
|
|
}
|
|
end:
|
|
s->in_handshake--;
|
|
|
|
#ifndef OPENSSL_NO_SCTP
|
|
/*
|
|
* Notify SCTP BIO socket to leave handshake mode and allow stream
|
|
* identifier other than 0. Will be ignored if no SCTP is used.
|
|
*/
|
|
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
|
|
s->in_handshake, NULL);
|
|
#endif
|
|
|
|
if (buf != NULL)
|
|
BUF_MEM_free(buf);
|
|
if (cb != NULL)
|
|
cb(s, SSL_CB_CONNECT_EXIT, ret);
|
|
return (ret);
|
|
}
|
|
|
|
int dtls1_client_hello(SSL *s)
|
|
{
|
|
unsigned char *buf;
|
|
unsigned char *p, *d;
|
|
unsigned int i, j;
|
|
unsigned long l;
|
|
SSL_COMP *comp;
|
|
|
|
buf = (unsigned char *)s->init_buf->data;
|
|
if (s->state == SSL3_ST_CW_CLNT_HELLO_A) {
|
|
SSL_SESSION *sess = s->session;
|
|
if ((s->session == NULL) || (s->session->ssl_version != s->version) ||
|
|
#ifdef OPENSSL_NO_TLSEXT
|
|
!sess->session_id_length ||
|
|
#else
|
|
(!sess->session_id_length && !sess->tlsext_tick) ||
|
|
#endif
|
|
(s->session->not_resumable)) {
|
|
if (!ssl_get_new_session(s, 0))
|
|
goto err;
|
|
}
|
|
/* else use the pre-loaded session */
|
|
|
|
p = s->s3->client_random;
|
|
|
|
/*
|
|
* if client_random is initialized, reuse it, we are required to use
|
|
* same upon reply to HelloVerify
|
|
*/
|
|
for (i = 0; p[i] == '\0' && i < sizeof(s->s3->client_random); i++) ;
|
|
if (i == sizeof(s->s3->client_random))
|
|
ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random));
|
|
|
|
/* Do the message type and length last */
|
|
d = p = &(buf[DTLS1_HM_HEADER_LENGTH]);
|
|
|
|
*(p++) = s->version >> 8;
|
|
*(p++) = s->version & 0xff;
|
|
s->client_version = s->version;
|
|
|
|
/* Random stuff */
|
|
memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
|
|
p += SSL3_RANDOM_SIZE;
|
|
|
|
/* Session ID */
|
|
if (s->new_session)
|
|
i = 0;
|
|
else
|
|
i = s->session->session_id_length;
|
|
*(p++) = i;
|
|
if (i != 0) {
|
|
if (i > sizeof s->session->session_id) {
|
|
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
memcpy(p, s->session->session_id, i);
|
|
p += i;
|
|
}
|
|
|
|
/* cookie stuff */
|
|
if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
|
|
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
*(p++) = s->d1->cookie_len;
|
|
memcpy(p, s->d1->cookie, s->d1->cookie_len);
|
|
p += s->d1->cookie_len;
|
|
|
|
/* Ciphers supported */
|
|
i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0);
|
|
if (i == 0) {
|
|
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
|
|
goto err;
|
|
}
|
|
s2n(i, p);
|
|
p += i;
|
|
|
|
/* COMPRESSION */
|
|
if (s->ctx->comp_methods == NULL)
|
|
j = 0;
|
|
else
|
|
j = sk_SSL_COMP_num(s->ctx->comp_methods);
|
|
*(p++) = 1 + j;
|
|
for (i = 0; i < j; i++) {
|
|
comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
|
|
*(p++) = comp->id;
|
|
}
|
|
*(p++) = 0; /* Add the NULL method */
|
|
|
|
#ifndef OPENSSL_NO_TLSEXT
|
|
/* TLS extensions */
|
|
if (ssl_prepare_clienthello_tlsext(s) <= 0) {
|
|
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
|
|
goto err;
|
|
}
|
|
if ((p =
|
|
ssl_add_clienthello_tlsext(s, p,
|
|
buf + SSL3_RT_MAX_PLAIN_LENGTH)) ==
|
|
NULL) {
|
|
SSLerr(SSL_F_DTLS1_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
#endif
|
|
|
|
l = (p - d);
|
|
d = buf;
|
|
|
|
d = dtls1_set_message_header(s, d, SSL3_MT_CLIENT_HELLO, l, 0, l);
|
|
|
|
s->state = SSL3_ST_CW_CLNT_HELLO_B;
|
|
/* number of bytes to write */
|
|
s->init_num = p - buf;
|
|
s->init_off = 0;
|
|
|
|
/* buffer the message to handle re-xmits */
|
|
dtls1_buffer_message(s, 0);
|
|
}
|
|
|
|
/* SSL3_ST_CW_CLNT_HELLO_B */
|
|
return (dtls1_do_write(s, SSL3_RT_HANDSHAKE));
|
|
err:
|
|
return (-1);
|
|
}
|
|
|
|
static int dtls1_get_hello_verify(SSL *s)
|
|
{
|
|
int n, al, ok = 0;
|
|
unsigned char *data;
|
|
unsigned int cookie_len;
|
|
|
|
n = s->method->ssl_get_message(s,
|
|
DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
|
|
DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
|
|
-1, s->max_cert_list, &ok);
|
|
|
|
if (!ok)
|
|
return ((int)n);
|
|
|
|
if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) {
|
|
s->d1->send_cookie = 0;
|
|
s->s3->tmp.reuse_message = 1;
|
|
return (1);
|
|
}
|
|
|
|
data = (unsigned char *)s->init_msg;
|
|
|
|
if ((data[0] != (s->version >> 8)) || (data[1] != (s->version & 0xff))) {
|
|
SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY, SSL_R_WRONG_SSL_VERSION);
|
|
s->version = (s->version & 0xff00) | data[1];
|
|
al = SSL_AD_PROTOCOL_VERSION;
|
|
goto f_err;
|
|
}
|
|
data += 2;
|
|
|
|
cookie_len = *(data++);
|
|
if (cookie_len > sizeof(s->d1->cookie)) {
|
|
al = SSL_AD_ILLEGAL_PARAMETER;
|
|
goto f_err;
|
|
}
|
|
|
|
memcpy(s->d1->cookie, data, cookie_len);
|
|
s->d1->cookie_len = cookie_len;
|
|
|
|
s->d1->send_cookie = 1;
|
|
return 1;
|
|
|
|
f_err:
|
|
ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
|
s->state = SSL_ST_ERR;
|
|
return -1;
|
|
}
|
|
|
|
int dtls1_send_client_key_exchange(SSL *s)
|
|
{
|
|
unsigned char *p, *d;
|
|
int n;
|
|
unsigned long alg_k;
|
|
#ifndef OPENSSL_NO_RSA
|
|
unsigned char *q;
|
|
EVP_PKEY *pkey = NULL;
|
|
#endif
|
|
#ifndef OPENSSL_NO_KRB5
|
|
KSSL_ERR kssl_err;
|
|
#endif /* OPENSSL_NO_KRB5 */
|
|
#ifndef OPENSSL_NO_ECDH
|
|
EC_KEY *clnt_ecdh = NULL;
|
|
const EC_POINT *srvr_ecpoint = NULL;
|
|
EVP_PKEY *srvr_pub_pkey = NULL;
|
|
unsigned char *encodedPoint = NULL;
|
|
int encoded_pt_len = 0;
|
|
BN_CTX *bn_ctx = NULL;
|
|
#endif
|
|
|
|
if (s->state == SSL3_ST_CW_KEY_EXCH_A) {
|
|
d = (unsigned char *)s->init_buf->data;
|
|
p = &(d[DTLS1_HM_HEADER_LENGTH]);
|
|
|
|
alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
|
|
|
|
/* Fool emacs indentation */
|
|
if (0) {
|
|
}
|
|
#ifndef OPENSSL_NO_RSA
|
|
else if (alg_k & SSL_kRSA) {
|
|
RSA *rsa;
|
|
unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
|
|
|
|
if (s->session->sess_cert == NULL) {
|
|
/*
|
|
* We should always have a server certificate with SSL_kRSA.
|
|
*/
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if (s->session->sess_cert->peer_rsa_tmp != NULL)
|
|
rsa = s->session->sess_cert->peer_rsa_tmp;
|
|
else {
|
|
pkey =
|
|
X509_get_pubkey(s->session->
|
|
sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].
|
|
x509);
|
|
if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA)
|
|
|| (pkey->pkey.rsa == NULL)) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
rsa = pkey->pkey.rsa;
|
|
EVP_PKEY_free(pkey);
|
|
}
|
|
|
|
tmp_buf[0] = s->client_version >> 8;
|
|
tmp_buf[1] = s->client_version & 0xff;
|
|
if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0)
|
|
goto err;
|
|
|
|
s->session->master_key_length = sizeof tmp_buf;
|
|
|
|
q = p;
|
|
/* Fix buf for TLS and [incidentally] DTLS */
|
|
if (s->version > SSL3_VERSION)
|
|
p += 2;
|
|
n = RSA_public_encrypt(sizeof tmp_buf,
|
|
tmp_buf, p, rsa, RSA_PKCS1_PADDING);
|
|
# ifdef PKCS1_CHECK
|
|
if (s->options & SSL_OP_PKCS1_CHECK_1)
|
|
p[1]++;
|
|
if (s->options & SSL_OP_PKCS1_CHECK_2)
|
|
tmp_buf[0] = 0x70;
|
|
# endif
|
|
if (n <= 0) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
SSL_R_BAD_RSA_ENCRYPT);
|
|
goto err;
|
|
}
|
|
|
|
/* Fix buf for TLS and [incidentally] DTLS */
|
|
if (s->version > SSL3_VERSION) {
|
|
s2n(n, q);
|
|
n += 2;
|
|
}
|
|
|
|
s->session->master_key_length =
|
|
s->method->ssl3_enc->generate_master_secret(s,
|
|
s->
|
|
session->master_key,
|
|
tmp_buf,
|
|
sizeof tmp_buf);
|
|
OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
|
|
}
|
|
#endif
|
|
#ifndef OPENSSL_NO_KRB5
|
|
else if (alg_k & SSL_kKRB5) {
|
|
krb5_error_code krb5rc;
|
|
KSSL_CTX *kssl_ctx = s->kssl_ctx;
|
|
/* krb5_data krb5_ap_req; */
|
|
krb5_data *enc_ticket;
|
|
krb5_data authenticator, *authp = NULL;
|
|
EVP_CIPHER_CTX ciph_ctx;
|
|
const EVP_CIPHER *enc = NULL;
|
|
unsigned char iv[EVP_MAX_IV_LENGTH];
|
|
unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
|
|
unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH];
|
|
int padl, outl = sizeof(epms);
|
|
|
|
EVP_CIPHER_CTX_init(&ciph_ctx);
|
|
|
|
# ifdef KSSL_DEBUG
|
|
printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
|
|
alg_k, SSL_kKRB5);
|
|
# endif /* KSSL_DEBUG */
|
|
|
|
authp = NULL;
|
|
# ifdef KRB5SENDAUTH
|
|
if (KRB5SENDAUTH)
|
|
authp = &authenticator;
|
|
# endif /* KRB5SENDAUTH */
|
|
|
|
krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err);
|
|
enc = kssl_map_enc(kssl_ctx->enctype);
|
|
if (enc == NULL)
|
|
goto err;
|
|
# ifdef KSSL_DEBUG
|
|
{
|
|
printf("kssl_cget_tkt rtn %d\n", krb5rc);
|
|
if (krb5rc && kssl_err.text)
|
|
printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
|
|
}
|
|
# endif /* KSSL_DEBUG */
|
|
|
|
if (krb5rc) {
|
|
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason);
|
|
goto err;
|
|
}
|
|
|
|
/*-
|
|
* 20010406 VRS - Earlier versions used KRB5 AP_REQ
|
|
** in place of RFC 2712 KerberosWrapper, as in:
|
|
**
|
|
** Send ticket (copy to *p, set n = length)
|
|
** n = krb5_ap_req.length;
|
|
** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
|
|
** if (krb5_ap_req.data)
|
|
** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
|
|
**
|
|
** Now using real RFC 2712 KerberosWrapper
|
|
** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
|
|
** Note: 2712 "opaque" types are here replaced
|
|
** with a 2-byte length followed by the value.
|
|
** Example:
|
|
** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
|
|
** Where "xx xx" = length bytes. Shown here with
|
|
** optional authenticator omitted.
|
|
*/
|
|
|
|
/* KerberosWrapper.Ticket */
|
|
s2n(enc_ticket->length, p);
|
|
memcpy(p, enc_ticket->data, enc_ticket->length);
|
|
p += enc_ticket->length;
|
|
n = enc_ticket->length + 2;
|
|
|
|
/* KerberosWrapper.Authenticator */
|
|
if (authp && authp->length) {
|
|
s2n(authp->length, p);
|
|
memcpy(p, authp->data, authp->length);
|
|
p += authp->length;
|
|
n += authp->length + 2;
|
|
|
|
free(authp->data);
|
|
authp->data = NULL;
|
|
authp->length = 0;
|
|
} else {
|
|
s2n(0, p); /* null authenticator length */
|
|
n += 2;
|
|
}
|
|
|
|
if (RAND_bytes(tmp_buf, sizeof tmp_buf) <= 0)
|
|
goto err;
|
|
|
|
/*-
|
|
* 20010420 VRS. Tried it this way; failed.
|
|
* EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
|
|
* EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
|
|
* kssl_ctx->length);
|
|
* EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
|
|
*/
|
|
|
|
memset(iv, 0, sizeof iv); /* per RFC 1510 */
|
|
EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv);
|
|
EVP_EncryptUpdate(&ciph_ctx, epms, &outl, tmp_buf,
|
|
sizeof tmp_buf);
|
|
EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl);
|
|
outl += padl;
|
|
if (outl > (int)sizeof epms) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
EVP_CIPHER_CTX_cleanup(&ciph_ctx);
|
|
|
|
/* KerberosWrapper.EncryptedPreMasterSecret */
|
|
s2n(outl, p);
|
|
memcpy(p, epms, outl);
|
|
p += outl;
|
|
n += outl + 2;
|
|
|
|
s->session->master_key_length =
|
|
s->method->ssl3_enc->generate_master_secret(s,
|
|
s->
|
|
session->master_key,
|
|
tmp_buf,
|
|
sizeof tmp_buf);
|
|
|
|
OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
|
|
OPENSSL_cleanse(epms, outl);
|
|
}
|
|
#endif
|
|
#ifndef OPENSSL_NO_DH
|
|
else if (alg_k & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) {
|
|
DH *dh_srvr, *dh_clnt;
|
|
|
|
if (s->session->sess_cert == NULL) {
|
|
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
SSL_R_UNEXPECTED_MESSAGE);
|
|
goto err;
|
|
}
|
|
|
|
if (s->session->sess_cert->peer_dh_tmp != NULL)
|
|
dh_srvr = s->session->sess_cert->peer_dh_tmp;
|
|
else {
|
|
/* we get them from the cert */
|
|
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
|
|
goto err;
|
|
}
|
|
|
|
/* generate a new random key */
|
|
if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
|
|
goto err;
|
|
}
|
|
if (!DH_generate_key(dh_clnt)) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* use the 'p' output buffer for the DH key, but make sure to
|
|
* clear it out afterwards
|
|
*/
|
|
|
|
n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt);
|
|
|
|
if (n <= 0) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* generate master key from the result */
|
|
s->session->master_key_length =
|
|
s->method->ssl3_enc->generate_master_secret(s,
|
|
s->
|
|
session->master_key,
|
|
p, n);
|
|
/* clean up */
|
|
memset(p, 0, n);
|
|
|
|
/* send off the data */
|
|
n = BN_num_bytes(dh_clnt->pub_key);
|
|
s2n(n, p);
|
|
BN_bn2bin(dh_clnt->pub_key, p);
|
|
n += 2;
|
|
|
|
DH_free(dh_clnt);
|
|
|
|
/* perhaps clean things up a bit EAY EAY EAY EAY */
|
|
}
|
|
#endif
|
|
#ifndef OPENSSL_NO_ECDH
|
|
else if (alg_k & (SSL_kEECDH | SSL_kECDHr | SSL_kECDHe)) {
|
|
const EC_GROUP *srvr_group = NULL;
|
|
EC_KEY *tkey;
|
|
int ecdh_clnt_cert = 0;
|
|
int field_size = 0;
|
|
|
|
if (s->session->sess_cert == NULL) {
|
|
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
SSL_R_UNEXPECTED_MESSAGE);
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Did we send out the client's ECDH share for use in premaster
|
|
* computation as part of client certificate? If so, set
|
|
* ecdh_clnt_cert to 1.
|
|
*/
|
|
if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) {
|
|
/*
|
|
* XXX: For now, we do not support client authentication
|
|
* using ECDH certificates. To add such support, one needs to
|
|
* add code that checks for appropriate conditions and sets
|
|
* ecdh_clnt_cert to 1. For example, the cert have an ECC key
|
|
* on the same curve as the server's and the key should be
|
|
* authorized for key agreement. One also needs to add code
|
|
* in ssl3_connect to skip sending the certificate verify
|
|
* message. if ((s->cert->key->privatekey != NULL) &&
|
|
* (s->cert->key->privatekey->type == EVP_PKEY_EC) && ...)
|
|
* ecdh_clnt_cert = 1;
|
|
*/
|
|
}
|
|
|
|
if (s->session->sess_cert->peer_ecdh_tmp != NULL) {
|
|
tkey = s->session->sess_cert->peer_ecdh_tmp;
|
|
} else {
|
|
/* Get the Server Public Key from Cert */
|
|
srvr_pub_pkey =
|
|
X509_get_pubkey(s->session->
|
|
sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
|
|
if ((srvr_pub_pkey == NULL)
|
|
|| (srvr_pub_pkey->type != EVP_PKEY_EC)
|
|
|| (srvr_pub_pkey->pkey.ec == NULL)) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
tkey = srvr_pub_pkey->pkey.ec;
|
|
}
|
|
|
|
srvr_group = EC_KEY_get0_group(tkey);
|
|
srvr_ecpoint = EC_KEY_get0_public_key(tkey);
|
|
|
|
if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if ((clnt_ecdh = EC_KEY_new()) == NULL) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
if (ecdh_clnt_cert) {
|
|
/*
|
|
* Reuse key info from our certificate We only need our
|
|
* private key to perform the ECDH computation.
|
|
*/
|
|
const BIGNUM *priv_key;
|
|
tkey = s->cert->key->privatekey->pkey.ec;
|
|
priv_key = EC_KEY_get0_private_key(tkey);
|
|
if (priv_key == NULL) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_EC_LIB);
|
|
goto err;
|
|
}
|
|
} else {
|
|
/* Generate a new ECDH key pair */
|
|
if (!(EC_KEY_generate_key(clnt_ecdh))) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_ECDH_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* use the 'p' output buffer for the ECDH key, but make sure to
|
|
* clear it out afterwards
|
|
*/
|
|
|
|
field_size = EC_GROUP_get_degree(srvr_group);
|
|
if (field_size <= 0) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
|
|
goto err;
|
|
}
|
|
n = ECDH_compute_key(p, (field_size + 7) / 8, srvr_ecpoint,
|
|
clnt_ecdh, NULL);
|
|
if (n <= 0) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
|
|
goto err;
|
|
}
|
|
|
|
/* generate master key from the result */
|
|
s->session->master_key_length =
|
|
s->method->ssl3_enc->generate_master_secret(s,
|
|
s->
|
|
session->master_key,
|
|
p, n);
|
|
|
|
memset(p, 0, n); /* clean up */
|
|
|
|
if (ecdh_clnt_cert) {
|
|
/* Send empty client key exch message */
|
|
n = 0;
|
|
} else {
|
|
/*
|
|
* First check the size of encoding and allocate memory
|
|
* accordingly.
|
|
*/
|
|
encoded_pt_len =
|
|
EC_POINT_point2oct(srvr_group,
|
|
EC_KEY_get0_public_key(clnt_ecdh),
|
|
POINT_CONVERSION_UNCOMPRESSED,
|
|
NULL, 0, NULL);
|
|
|
|
encodedPoint = (unsigned char *)
|
|
OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char));
|
|
bn_ctx = BN_CTX_new();
|
|
if ((encodedPoint == NULL) || (bn_ctx == NULL)) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
/* Encode the public key */
|
|
n = EC_POINT_point2oct(srvr_group,
|
|
EC_KEY_get0_public_key(clnt_ecdh),
|
|
POINT_CONVERSION_UNCOMPRESSED,
|
|
encodedPoint, encoded_pt_len, bn_ctx);
|
|
|
|
*p = n; /* length of encoded point */
|
|
/* Encoded point will be copied here */
|
|
p += 1;
|
|
/* copy the point */
|
|
memcpy((unsigned char *)p, encodedPoint, n);
|
|
/* increment n to account for length field */
|
|
n += 1;
|
|
}
|
|
|
|
/* Free allocated memory */
|
|
BN_CTX_free(bn_ctx);
|
|
if (encodedPoint != NULL)
|
|
OPENSSL_free(encodedPoint);
|
|
if (clnt_ecdh != NULL)
|
|
EC_KEY_free(clnt_ecdh);
|
|
EVP_PKEY_free(srvr_pub_pkey);
|
|
}
|
|
#endif /* !OPENSSL_NO_ECDH */
|
|
|
|
#ifndef OPENSSL_NO_PSK
|
|
else if (alg_k & SSL_kPSK) {
|
|
char identity[PSK_MAX_IDENTITY_LEN];
|
|
unsigned char *t = NULL;
|
|
unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN * 2 + 4];
|
|
unsigned int pre_ms_len = 0, psk_len = 0;
|
|
int psk_err = 1;
|
|
|
|
n = 0;
|
|
if (s->psk_client_callback == NULL) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
SSL_R_PSK_NO_CLIENT_CB);
|
|
goto err;
|
|
}
|
|
|
|
psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
|
|
identity, PSK_MAX_IDENTITY_LEN,
|
|
psk_or_pre_ms,
|
|
sizeof(psk_or_pre_ms));
|
|
if (psk_len > PSK_MAX_PSK_LEN) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto psk_err;
|
|
} else if (psk_len == 0) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
SSL_R_PSK_IDENTITY_NOT_FOUND);
|
|
goto psk_err;
|
|
}
|
|
|
|
/* create PSK pre_master_secret */
|
|
pre_ms_len = 2 + psk_len + 2 + psk_len;
|
|
t = psk_or_pre_ms;
|
|
memmove(psk_or_pre_ms + psk_len + 4, psk_or_pre_ms, psk_len);
|
|
s2n(psk_len, t);
|
|
memset(t, 0, psk_len);
|
|
t += psk_len;
|
|
s2n(psk_len, t);
|
|
|
|
if (s->session->psk_identity_hint != NULL)
|
|
OPENSSL_free(s->session->psk_identity_hint);
|
|
s->session->psk_identity_hint =
|
|
BUF_strdup(s->ctx->psk_identity_hint);
|
|
if (s->ctx->psk_identity_hint != NULL
|
|
&& s->session->psk_identity_hint == NULL) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto psk_err;
|
|
}
|
|
|
|
if (s->session->psk_identity != NULL)
|
|
OPENSSL_free(s->session->psk_identity);
|
|
s->session->psk_identity = BUF_strdup(identity);
|
|
if (s->session->psk_identity == NULL) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto psk_err;
|
|
}
|
|
|
|
s->session->master_key_length =
|
|
s->method->ssl3_enc->generate_master_secret(s,
|
|
s->
|
|
session->master_key,
|
|
psk_or_pre_ms,
|
|
pre_ms_len);
|
|
n = strlen(identity);
|
|
s2n(n, p);
|
|
memcpy(p, identity, n);
|
|
n += 2;
|
|
psk_err = 0;
|
|
psk_err:
|
|
OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
|
|
OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
|
|
if (psk_err != 0) {
|
|
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
|
goto err;
|
|
}
|
|
}
|
|
#endif
|
|
else {
|
|
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
d = dtls1_set_message_header(s, d,
|
|
SSL3_MT_CLIENT_KEY_EXCHANGE, n, 0, n);
|
|
/*-
|
|
*(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
|
|
l2n3(n,d);
|
|
l2n(s->d1->handshake_write_seq,d);
|
|
s->d1->handshake_write_seq++;
|
|
*/
|
|
|
|
s->state = SSL3_ST_CW_KEY_EXCH_B;
|
|
/* number of bytes to write */
|
|
s->init_num = n + DTLS1_HM_HEADER_LENGTH;
|
|
s->init_off = 0;
|
|
|
|
/* buffer the message to handle re-xmits */
|
|
dtls1_buffer_message(s, 0);
|
|
}
|
|
|
|
/* SSL3_ST_CW_KEY_EXCH_B */
|
|
return (dtls1_do_write(s, SSL3_RT_HANDSHAKE));
|
|
err:
|
|
#ifndef OPENSSL_NO_ECDH
|
|
BN_CTX_free(bn_ctx);
|
|
if (encodedPoint != NULL)
|
|
OPENSSL_free(encodedPoint);
|
|
if (clnt_ecdh != NULL)
|
|
EC_KEY_free(clnt_ecdh);
|
|
EVP_PKEY_free(srvr_pub_pkey);
|
|
#endif
|
|
return (-1);
|
|
}
|
|
|
|
int dtls1_send_client_verify(SSL *s)
|
|
{
|
|
unsigned char *p, *d;
|
|
unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH];
|
|
EVP_PKEY *pkey;
|
|
#ifndef OPENSSL_NO_RSA
|
|
unsigned u = 0;
|
|
#endif
|
|
unsigned long n;
|
|
#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA)
|
|
int j;
|
|
#endif
|
|
|
|
if (s->state == SSL3_ST_CW_CERT_VRFY_A) {
|
|
d = (unsigned char *)s->init_buf->data;
|
|
p = &(d[DTLS1_HM_HEADER_LENGTH]);
|
|
pkey = s->cert->key->privatekey;
|
|
|
|
s->method->ssl3_enc->cert_verify_mac(s,
|
|
NID_sha1,
|
|
&(data[MD5_DIGEST_LENGTH]));
|
|
|
|
#ifndef OPENSSL_NO_RSA
|
|
if (pkey->type == EVP_PKEY_RSA) {
|
|
s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0]));
|
|
if (RSA_sign(NID_md5_sha1, data,
|
|
MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
|
|
&(p[2]), &u, pkey->pkey.rsa) <= 0) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB);
|
|
goto err;
|
|
}
|
|
s2n(u, p);
|
|
n = u + 2;
|
|
} else
|
|
#endif
|
|
#ifndef OPENSSL_NO_DSA
|
|
if (pkey->type == EVP_PKEY_DSA) {
|
|
if (!DSA_sign(pkey->save_type,
|
|
&(data[MD5_DIGEST_LENGTH]),
|
|
SHA_DIGEST_LENGTH, &(p[2]),
|
|
(unsigned int *)&j, pkey->pkey.dsa)) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB);
|
|
goto err;
|
|
}
|
|
s2n(j, p);
|
|
n = j + 2;
|
|
} else
|
|
#endif
|
|
#ifndef OPENSSL_NO_ECDSA
|
|
if (pkey->type == EVP_PKEY_EC) {
|
|
if (!ECDSA_sign(pkey->save_type,
|
|
&(data[MD5_DIGEST_LENGTH]),
|
|
SHA_DIGEST_LENGTH, &(p[2]),
|
|
(unsigned int *)&j, pkey->pkey.ec)) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB);
|
|
goto err;
|
|
}
|
|
s2n(j, p);
|
|
n = j + 2;
|
|
} else
|
|
#endif
|
|
{
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
d = dtls1_set_message_header(s, d,
|
|
SSL3_MT_CERTIFICATE_VERIFY, n, 0, n);
|
|
|
|
s->init_num = (int)n + DTLS1_HM_HEADER_LENGTH;
|
|
s->init_off = 0;
|
|
|
|
/* buffer the message to handle re-xmits */
|
|
dtls1_buffer_message(s, 0);
|
|
|
|
s->state = SSL3_ST_CW_CERT_VRFY_B;
|
|
}
|
|
|
|
/* s->state = SSL3_ST_CW_CERT_VRFY_B */
|
|
return (dtls1_do_write(s, SSL3_RT_HANDSHAKE));
|
|
err:
|
|
return (-1);
|
|
}
|
|
|
|
int dtls1_send_client_certificate(SSL *s)
|
|
{
|
|
X509 *x509 = NULL;
|
|
EVP_PKEY *pkey = NULL;
|
|
int i;
|
|
unsigned long l;
|
|
|
|
if (s->state == SSL3_ST_CW_CERT_A) {
|
|
if ((s->cert == NULL) ||
|
|
(s->cert->key->x509 == NULL) ||
|
|
(s->cert->key->privatekey == NULL))
|
|
s->state = SSL3_ST_CW_CERT_B;
|
|
else
|
|
s->state = SSL3_ST_CW_CERT_C;
|
|
}
|
|
|
|
/* We need to get a client cert */
|
|
if (s->state == SSL3_ST_CW_CERT_B) {
|
|
/*
|
|
* If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
|
|
* return(-1); We then get retied later
|
|
*/
|
|
i = 0;
|
|
i = ssl_do_client_cert_cb(s, &x509, &pkey);
|
|
if (i < 0) {
|
|
s->rwstate = SSL_X509_LOOKUP;
|
|
return (-1);
|
|
}
|
|
s->rwstate = SSL_NOTHING;
|
|
if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
|
|
s->state = SSL3_ST_CW_CERT_B;
|
|
if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
|
|
i = 0;
|
|
} else if (i == 1) {
|
|
i = 0;
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE,
|
|
SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
|
|
}
|
|
|
|
if (x509 != NULL)
|
|
X509_free(x509);
|
|
if (pkey != NULL)
|
|
EVP_PKEY_free(pkey);
|
|
if (i == 0) {
|
|
if (s->version == SSL3_VERSION) {
|
|
s->s3->tmp.cert_req = 0;
|
|
ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
|
|
return (1);
|
|
} else {
|
|
s->s3->tmp.cert_req = 2;
|
|
}
|
|
}
|
|
|
|
/* Ok, we have a cert */
|
|
s->state = SSL3_ST_CW_CERT_C;
|
|
}
|
|
|
|
if (s->state == SSL3_ST_CW_CERT_C) {
|
|
s->state = SSL3_ST_CW_CERT_D;
|
|
l = dtls1_output_cert_chain(s,
|
|
(s->s3->tmp.cert_req ==
|
|
2) ? NULL : s->cert->key->x509);
|
|
if (!l) {
|
|
SSLerr(SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
|
|
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
s->init_num = (int)l;
|
|
s->init_off = 0;
|
|
|
|
/* set header called by dtls1_output_cert_chain() */
|
|
|
|
/* buffer the message to handle re-xmits */
|
|
dtls1_buffer_message(s, 0);
|
|
}
|
|
/* SSL3_ST_CW_CERT_D */
|
|
return (dtls1_do_write(s, SSL3_RT_HANDSHAKE));
|
|
}
|