/*

* 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>

/**

 * 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__