/*

* Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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:   Cryptographic Intermediate Layer to use and change any crypto library easily.

*

*/

#ifndef __IKECRYPTO_H_

#define __IKECRYPTO_H__

#include <e32base.h>

#include "utlcrypto.h"

NONSHARABLE_CLASS(CDHKeys) : public CBase

{

public:

    static CDHKeys* NewL(const TDesC8& aN,const TDesC8& aG);

	static CDHKeys* CreateDHKeyL(TUint aGroupDesc);

	HBufC8* ComputeAgreedKeyL(const TDesC8 &aPeerPublicKey);

    HBufC8* GetPubKey();

    void XValueL(); 

    inline const HBufC8* KValueL(const TDesC8& aY) const {return iDHKey->CompleteKL(aY);}

	inline TInt ModulusLength() {return iModuluslength;}

    ~CDHKeys();

private:

    CUtlDiffieHellman* iDHKey;

    const HBufC8*      iPubKey;

	TInt               iModuluslength;

};

class IkeCrypto

{

public:

	static void DecryptL(const TUint8* aInputPayload, TUint8* aOutputPayload, TInt aLength, TUint8* aIV, 

                         const TDesC8& aKey, TUint16 aEncrAlg);

	static void EncryptL(const TDesC8& aInput, TPtr8& aOutput, const TDesC8& aIv, const TDesC8& aKey, TUint16 aEncrAlg);

	static TInt IntegHMACL(const TDesC8& aInput, TDes8& aChecksum, const TDesC8& aKeyData, TUint16 aIntegAlg);	

	static HBufC8* PrfhmacL(const TDesC8& aInput, const TDesC8& aKeyData, TUint16 aPrfAlg);

	static HBufC8* PrfL(const TDesC8& aInput, TUint16 aPrfAlg);	

	static TInt AlgorithmInfo(TUint16 aTransform, TUint16 aAlgCode, TInt* aBlockLth=NULL,

							  TUtlCrypto::TUtlSymmetricCipherId* aCipherId=NULL,

							  TUtlCrypto::TUtlMessageDigestId*   aDigestId=NULL);

	static HBufC8* GenerateKeyingMaterialL(const TDesC8& aK, const TDesC8& aS, TInt aKeyMatLth, TUint16 aPRFAlg);			

};

#endif