/*

* 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: 

* DSA shim classes definition

*

*/

/**

 @file

 @internalComponent

 @released

*/

#ifndef __DSASHIM_H__

#define __DSASHIM_H__

#include <asymmetric.h>

namespace CryptoSpi

	{

	class CSigner;

	class CVerifier;

	class CKey;

	}

NONSHARABLE_CLASS(CDsaSignerShim) : public CDSASigner

{

public:

	/**

	Creates an CDsaSignerShim object which has the same interface

	as CDSASigner but delegates all work to a Crypto SPI plug-in.

	@param aKey The signing key

	@return A pointer to a CDsaSignerShim instance

	*/

	static CDsaSignerShim* NewL(const CDSAPrivateKey& aKey);

	/**

	Creates an CDsaSignerShim object which has the same interface

	as CDSASigner but delegates all work to a Crypto SPI plug-in.

	A pointer to the new object is placed on the cleanup stack

	@param aKey The signing key

	@return A pointer to a CDsaSignerShim instance

	*/

	static CDsaSignerShim* NewLC(const CDSAPrivateKey& aKey);

	/**

	Digitally signs the specified input message 

	Note that in order to be interoperable and compliant with the DSS, aInput

	must be the result of a SHA-1 hash.

	@param aInput	A SHA-1 hash of the message to sign

	@return			A pointer to a new CSignature object

	@panic ECryptoPanicInputTooLarge	If aInput is larger than MaxInputLength(),

										which is likely to happen if the caller

										has passed in something that has not been hashed.

	*/

	virtual CDSASignature* SignL(const TDesC8& aInput) const;

	//From MSignatureSystem

	virtual TInt MaxInputLength() const;

	/// Destructor

	~CDsaSignerShim();

private:

	/// Constructor

	CDsaSignerShim(const CDSAPrivateKey& aKey);

	void ConstructL(const CDSAPrivateKey& aKey);

private:

	/// SPI delegate

	CryptoSpi::CSigner* iSignerImpl;

	/// SPI requires all key to passed as key-objects

	CryptoSpi::CKey* iKey;

};

NONSHARABLE_CLASS(CDsaVerifierShim) : public CDSAVerifier

{

public:

	/**

	Creates an CDsaVerifierShim object which has the same interface

	as CDSAVerifier but delegates all work to a Crypto SPI plug-in.

	@param aKey The verification key

	@return A pointer to a CDsaVerifierShim instance

	*/

	static CDsaVerifierShim* NewL(const CDSAPublicKey& aKey);

	/**

	Creates an CDsaVerifierShim object which has the same interface

	as CDSAVerifier but delegates all work to a Crypto SPI plug-in.

	A pointer to the new object is placed on the cleanup stack

	@param aKey The verification key

	@return A pointer to a CDsaVerifierShim instance

	*/

	static CDsaVerifierShim* NewLC(const CDSAPublicKey& aKey);

	//From CVerifier	

	virtual TBool VerifyL(const TDesC8& aInput, const CDSASignature& aSignature) const;

	//From MSignatureSystem

	virtual TInt MaxInputLength() const;

	// Destructor

	~CDsaVerifierShim();

private:

	// Constructor

	CDsaVerifierShim(const CDSAPublicKey& aKey);

	void ConstructL(const CDSAPublicKey& aKey);

private:

	/// SPI delegate

	CryptoSpi::CVerifier* iVerifierImpl;

	/// SPI requires all key to passed as key-objects

	CryptoSpi::CKey* iKey;

};

#endif // __DSASHIM_H__