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/* crypto/engine/tb_ecdh.c */
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
*
* The Elliptic Curve Public-Key Crypto Library (ECC Code) included
* herein is developed by SUN MICROSYSTEMS, INC., and is contributed
* to the OpenSSL project.
*
* The ECC Code is licensed pursuant to the OpenSSL open source
* license provided below.
*
* The ECDH engine software is originally written by Nils Gura and
* Douglas Stebila of Sun Microsystems Laboratories.
*
*/
/* ====================================================================
* Copyright (c) 2000-2002 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include "eng_int.h"
/*
* If this symbol is defined then ENGINE_get_default_ECDH(), the function
* that is used by ECDH to hook in implementation code and cache defaults
* (etc), will display brief debugging summaries to stderr with the 'nid'.
*/
/* #define ENGINE_ECDH_DEBUG */
static ENGINE_TABLE *ecdh_table = NULL;
static const int dummy_nid = 1;
void ENGINE_unregister_ECDH(ENGINE *e)
{
engine_table_unregister(&ecdh_table, e);
}
static void engine_unregister_all_ECDH(void)
{
engine_table_cleanup(&ecdh_table);
}
int ENGINE_register_ECDH(ENGINE *e)
{
if (e->ecdh_meth)
return engine_table_register(&ecdh_table,
engine_unregister_all_ECDH, e,
&dummy_nid, 1, 0);
return 1;
}
void ENGINE_register_all_ECDH()
{
ENGINE *e;
for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
ENGINE_register_ECDH(e);
}
int ENGINE_set_default_ECDH(ENGINE *e)
{
if (e->ecdh_meth)
return engine_table_register(&ecdh_table,
engine_unregister_all_ECDH, e,
&dummy_nid, 1, 1);
return 1;
}
/*
* Exposed API function to get a functional reference from the implementation
* table (ie. try to get a functional reference from the tabled structural
* references).
*/
ENGINE *ENGINE_get_default_ECDH(void)
{
return engine_table_select(&ecdh_table, dummy_nid);
}
/* Obtains an ECDH implementation from an ENGINE functional reference */
const ECDH_METHOD *ENGINE_get_ECDH(const ENGINE *e)
{
return e->ecdh_meth;
}
/* Sets an ECDH implementation in an ENGINE structure */
int ENGINE_set_ECDH(ENGINE *e, const ECDH_METHOD *ecdh_meth)
{
e->ecdh_meth = ecdh_meth;
return 1;
}
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