Home | History | Annotate | Download | only in ecdh
      1 /* crypto/ecdh/ecdh_key.c */
      2 /* ====================================================================
      3  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
      4  *
      5  * The Elliptic Curve Public-Key Crypto Library (ECC Code) included
      6  * herein is developed by SUN MICROSYSTEMS, INC., and is contributed
      7  * to the OpenSSL project.
      8  *
      9  * The ECC Code is licensed pursuant to the OpenSSL open source
     10  * license provided below.
     11  *
     12  * The ECDH software is originally written by Douglas Stebila of
     13  * Sun Microsystems Laboratories.
     14  *
     15  */
     16 /* ====================================================================
     17  * Copyright (c) 1998-2003 The OpenSSL Project.  All rights reserved.
     18  *
     19  * Redistribution and use in source and binary forms, with or without
     20  * modification, are permitted provided that the following conditions
     21  * are met:
     22  *
     23  * 1. Redistributions of source code must retain the above copyright
     24  *    notice, this list of conditions and the following disclaimer.
     25  *
     26  * 2. Redistributions in binary form must reproduce the above copyright
     27  *    notice, this list of conditions and the following disclaimer in
     28  *    the documentation and/or other materials provided with the
     29  *    distribution.
     30  *
     31  * 3. All advertising materials mentioning features or use of this
     32  *    software must display the following acknowledgment:
     33  *    "This product includes software developed by the OpenSSL Project
     34  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
     35  *
     36  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
     37  *    endorse or promote products derived from this software without
     38  *    prior written permission. For written permission, please contact
     39  *    openssl-core (at) OpenSSL.org.
     40  *
     41  * 5. Products derived from this software may not be called "OpenSSL"
     42  *    nor may "OpenSSL" appear in their names without prior written
     43  *    permission of the OpenSSL Project.
     44  *
     45  * 6. Redistributions of any form whatsoever must retain the following
     46  *    acknowledgment:
     47  *    "This product includes software developed by the OpenSSL Project
     48  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
     49  *
     50  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
     51  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     53  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
     54  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     56  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     57  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     59  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     60  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
     61  * OF THE POSSIBILITY OF SUCH DAMAGE.
     62  * ====================================================================
     63  *
     64  * This product includes cryptographic software written by Eric Young
     65  * (eay (at) cryptsoft.com).  This product includes software written by Tim
     66  * Hudson (tjh (at) cryptsoft.com).
     67  *
     68  */
     69 
     70 #include "ech_locl.h"
     71 #ifndef OPENSSL_NO_ENGINE
     72 #include <openssl/engine.h>
     73 #endif
     74 
     75 int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
     76 	EC_KEY *eckey,
     77 	void *(*KDF)(const void *in, size_t inlen, void *out, size_t *outlen))
     78 {
     79 	ECDH_DATA *ecdh = ecdh_check(eckey);
     80 	if (ecdh == NULL)
     81 		return 0;
     82 	return ecdh->meth->compute_key(out, outlen, pub_key, eckey, KDF);
     83 }
     84