/*

* Copyright (c) 2005-2009 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: 

*

*/

/**

 @file

*/

#ifndef __TSIGNATUREINPUT_H__

#define __TSIGNATUREINPUT_H__

#include <e32base.h>

#include <hash.h>

/** An abstract class capable of representing a message to be signed or verified. */

class CSignatureInput : public CBase

    {

public:

    virtual void Update(const TDesC8& aInput) = 0;

    virtual TPtrC8 Final(void) = 0;

protected:

	CSignatureInput(void) {}

private:

    CSignatureInput(const CSignatureInput&);

    CSignatureInput& operator=(const CSignatureInput&);

    };

class CHashingSignatureInput : public CSignatureInput

    {

public:

    static CHashingSignatureInput* NewL(CMessageDigest::THashId aHashId);

    static CHashingSignatureInput* NewLC(CMessageDigest::THashId aHashId);

    virtual void Update(const TDesC8& aInput);

    virtual TPtrC8 Final(void);

    ~CHashingSignatureInput(void);

protected:

    CHashingSignatureInput(void);

    void ConstructL(CMessageDigest::THashId aHashId);

private:

    CMessageDigest* iHash;

private:

    CHashingSignatureInput(const CHashingSignatureInput&);

    CHashingSignatureInput& operator=(const CHashingSignatureInput&);

    };

#endif