/* 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).

  *

  */

  /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #include "eng_int.h"

 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

 #include "libcrypto_wsd_macros.h"

 #include "libcrypto_wsd.h"

 #endif

 /* 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 */

 #ifndef EMULATOR

 static ENGINE_TABLE *ecdh_table = NULL;

 #else

 GET_STATIC_VAR_FROM_TLS(ecdh_table,tb_ecdh,ENGINE_TABLE *)

 #define ecdh_table (*GET_WSD_VAR_NAME(ecdh_table,tb_ecdh, s)())

 #endif

 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;

 	}