/*

* Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

* This utility class provides functions to generate key identifer data from

* supplied key data

*

*/

/**

 @file

 @publishedPartner

 @released

*/

#ifndef _KEYIDENTIFIERUTIL_H_

#define _KEYIDENTIFIERUTIL_H_

#include <e32base.h>

class CRSAPublicKey;

class CDSAPublicKey;

class RInteger;

/** The length of a SHA-1 hash 

  * @publishedPartner

  * @released

  */

 const TInt KSHA1HashLengthInBytes = 20;

/**

  * A SHA-1 hash.

  * @publishedPartner

  * @released

  */

 typedef  TBuf8<KSHA1HashLengthInBytes> TSHA1Hash;

 /**

  * A SHA-1 hash is also used as a key identifier.

  * @publishedPartner

  * @released

  */

 typedef TSHA1Hash TKeyIdentifier;

/**

 * Utilities for generation of the key identifier

 * @publishedPartner

 * @released

 */

class KeyIdentifierUtil

	{

public:

	/**

	 * Creates a RSA key identifier using the RSAPublicKey.

	 *

	 * @param aKey	The RSA encryption key

	 * @param aIdentifier	key identifier

	  */

	IMPORT_C static void RSAKeyIdentifierL(const CRSAPublicKey& aKey, TKeyIdentifier& aIdentifier);

	/**

	 * Creates a DSA key identifier using the DSAPublicKey.

	 *

	 * @param aKey	The DSA encryption key

	 * @param aIdentifier	key identifier

	  */

	IMPORT_C static void DSAKeyIdentifierL(const CDSAPublicKey& aKey, TKeyIdentifier& aIdentifier);

	/**

	 * Creates a DHKeyIdentifier using the RInteger.

	 *

	 * @param aKey			The DH parameter 

	 * @param aIdentifier	key identifier

	  */

	IMPORT_C static void DHKeyIdentifierL(const RInteger& aKey, TKeyIdentifier& aIdentifier);

	};

#endif