/*

* Copyright (c) 2006-2009 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: 

*

*/

#ifndef __DSASIGNERIMPL_H__

#define __DSASIGNERIMPL_H__

/**

@file 

@internalComponent

@released

*/

#include <e32base.h>

#include <e32cmn.h>

#include <cryptospi/cryptospidef.h>

#include "signerimpl.h"

#include "common/inlines.h"

/**

 * Implementation of DSA signing

 */

namespace SoftwareCrypto

	{

	using namespace CryptoSpi;

	NONSHARABLE_CLASS(CDSASignerImpl) : public CSignerImpl

		{

	public:

		/**

		Creates an instance of a DSA signer plug-in.

		@param aKey The private key used to sign.

		@return A pointer to a CDSASignerImpl instance

		*/

		static CDSASignerImpl* NewL(const CKey& aKey);

		/**

		Creates an instance of a DSA signer plug-in.

		@param aKey The private key used to sign.

		@return A pointer to a CDSASignerImpl instance

		*/

		static CDSASignerImpl* NewLC(const CKey& aKey);

		// Override CSignerImpl virtual functions

		TUid ImplementationUid() const;

		// End of CSignerImpl

		// Override MSignatureBase virtual functions

		void SetKeyL(const CKey& aPrivateKey);

		TInt GetMaximumInputLengthL() const;

		// End of MSignatureBase

		// Override MSigner virtual functions

		void SignL(const TDesC8& aInput, CCryptoParams& aSignature);

		// End of MSigner

		const CExtendedCharacteristics* GetExtendedCharacteristicsL();

		static CExtendedCharacteristics* CreateExtendedCharacteristicsL();

		/// Destructor

		~CDSASignerImpl();

	protected:

		/// Constructor

		CDSASignerImpl();

	protected:

		/// second phase of construction

		virtual void ConstructL(const CKey& aKey);

	private:

		static const TUint KSha1HashLength = 20;

		};

	}

#endif // __DSASIGNERIMPL_H__