/*

 * Copyright (c) 2006-2010 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: 

 *

 */

 #ifndef __KEYAGREEMENTIMPL_H__

 #define __KEYAGREEMENTIMPL_H__

 /**

 @file 

 @internalComponent

 @released

 */

 #include <e32base.h>

 #include <cryptospi/cryptospidef.h>

 #include <cryptospi/keys.h>

 #include <cryptospi/keyagreementplugin.h>

 /**

  * Abstract base class for key agreement plug-ins.

  */

 namespace SoftwareCrypto

 	{

 	using namespace CryptoSpi;

 	NONSHARABLE_CLASS(CKeyAgreementImpl) : public CBase, public MKeyAgreement

 		{

 	public:

 		// Override MPlugin virtual functions

 		void Close();

 		void Reset(); // Always call reset in super-class if you override this

 		TAny* GetExtension(TUid aExtensionId);

 		void GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics);

 		// End of MPlugin

 		// Override MKeyAgreement virtual functions

 		void SetKeyL(const CKey& aSelfPrivateKey, const CCryptoParams* aParams);

 		// End of MKeyAgreement

 		/// Destructor

 		~CKeyAgreementImpl();

 	protected:

 		/**

 		Constructor

 		*/

 		CKeyAgreementImpl();

 		/**

 		Second phase of construction. Always call ConstructL in the super-class

 		if your override this method.

 		@param aPrivateKey The private key of one of the parties

 		@param aParams	The parameters shared between both parties

 		*/

 		virtual void ConstructL(const CKey& aPrivateKey, const CCryptoParams* aParams);

 		/**

 		Helper function implemented by concrete cipher sub-class that allows

 		GetCharacteristicsL to return the correct characteristics object.

 		@return The implemention uid

 		*/

 		virtual TUid ImplementationUid() const = 0;

 	private:

 	protected:

 		CKey* iPrivateKey;

 		CCryptoParams* iSharedParams;	// common parameters between our private key and their public key

 		};

 	}

 #endif	//	__KEYAGREEMENTIMPL_H__