/*

 * 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__