/*

* 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 IKEV1CRYPTO_H

#define IKEV1CRYPTO_H

#include <e32base.h>

#include "ikev1isakmpct.h"

class CUtlDiffieHellman;

NONSHARABLE_CLASS(CIkeKeys) : public CBase

{

public:

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

    HBufC8 *GetPubKey();

    void XValueL(); 

    const HBufC8* KValueL(const TDesC8& aY) const;

	inline TInt ModulusLength() {return iModuluslength;}

    ~CIkeKeys();

private:

    CUtlDiffieHellman* iDHKey;

    const HBufC8*      iPubKey;

	TInt               iModuluslength;

};

// SSL function implementation using Symbian apis

//  - des_ede3_cbc_encrypt

#define DES_ENCRYPT 1

#define DES_DECRYPT 0

#define HMAC_MD5_SIZE   128

#define HMAC_SHA1_SIZE  160

#define DESCBC_KEY_LEN  8

#define DESCBC_IV_LEN   8

#define AESCBC_DEF_KEY_LEN 16

#define AESCBC_IV_LEN   16

#define DEFAULT_NONCE_SIZE   128/8   //128 bits = 16 bytes

#define PAD_SIZE	64 + 2 * DEFAULT_NONCE_SIZE + 1000

//DH functions

CIkeKeys* GeneratePubPrivKeysL(TUint aGroupDesc);

HBufC8* ComputeAgreedKeyL(TUint aGroupDesc, const TDesC8 &aPeerPublicKey, CIkeKeys *aOwnKeys);

//

//Symmetric encryption/decryption functions

//

void DecryptL(const TUint8* aInputPayload, TUint8* aOutputPayload, TUint32 aLength, TDes8 &aIV, TDesC8& aKey, TUint16 aEncrAlg);

TBool EncryptL(TDes8& aInputPayload, TDes8& aOutputPayload,TDes8 &aIV, TDesC8& aKey , TUint16 aEncrAlg);

void Cipher3DesL(TUint8 *aInData, TInt aInDataLen, const TDesC8 &aPrfKey, TDes8 &aIV, TDes8 &aPrfOutput);

//

//Message Digest Algorithms

//

void MD5HashL(const TDesC8 &aInData, TDes8& aOutData);

void SHA1HashL(const TDesC8 &aInData, TDes8& aOutData);

void MD5HmacL(const TDesC8 &aInData, TDes8& aOutData, const TDesC8& aKeyData);

void SHA1HmacL(const TDesC8 &aInData, TDes8& aOutData, const TDesC8& aKeyData);

//The length of aInData must be less than PAD_SIZE. The caller of this function

//has to take care of handling the size of this parameter.

void Hmac3DesCbcL(const TDesC8 &aInData, TDes8& aOutData, const TDesC8& aKeyData);

TInt SymmetricCipherL(TUint8 *aInput,  TUint8 *aOutput, TInt aLength,

					  TUint8 *aKey,    TUint8 *aIV, TBool aEncr, TInt aEncAlg = DES_CBC);

#endif