/*

 * 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__