/*

* Copyright (c) 2002-2005 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: Security parser crypto manager.

*

*/

#ifndef __SPCRYPTO_H

#define __SPCRYPTO_H

#include <e32base.h>

#include <es_prot.h>

const TUint KProtocolCrypto =	0x104; // A dummy assignment for now (should have

// central registry)

const TUint KAfCrypto = 0x0803;			// Dummy

//

//	TAlgorithmDesc (and related types)

//

//		A description of available algorithm

//

typedef TBuf8<0x20> TAlgorithmName;

typedef enum

    {

    EAlgorithmClass_Digest,	// Message Digest algorithm

        EAlgorithmClass_Cipher,	// Symmetric Cipher algorithm

        //

        // New types are possible by adding the symbol here

        // and defining the corresponding abstract class

        // (similar to COwnMessageDigest and CSymmetricCipher)

        //

    } TAlgorithmClass;

class TAlgorithmDesc

    {

    public:

        TAlgorithmName iName;	// Descriptive name

        TAlgorithmClass iAlgType;

        TUint iMinBits;			// Min Length of the key in bits (all keys total)

        TUint iMaxBits;			// Max Length of the key in bits (all keys total)

        TUint iBlock;			// Length of the block in bytes

        TUint iVector;			// Initialization Vector length (bytes)

    };

//

// Each of the following includes virtual destructor

// just in case there is a need for a cleanup code

// when the object is deleted using a pointer to

// the base virtual class

//

//	COwnMessageDigest

//		Base Message Digest (abstract) class

//

class COwnMessageDigest : public CBase

    {

    public:

        virtual void Init()=0;

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

        virtual void Final(TDes8& aDigest)=0;

        virtual ~COwnMessageDigest() {}

    };

//

//	CSymmetricCipher

//		Base Symmetric Cipher (abstract) class

//

class CSymmetricCipher : public CBase

    {

    public:

        enum TAction { EEncrypt, EDecrypt };

        virtual void Setkey(const TDesC8& aKey)=0;

        virtual void InitL(const TDesC8 &anIV, TAction aMode)=0;

        //

        // ALL OutBuf's given to Update must exist up to Finish

        // call (or at least as long as at least blocksize octets

        // have been given to Update after it).

        //

        virtual void Update(TDes8& anOutBuf,const TDesC8& anInBuf)=0;

        //

        // Calling Finish is optional, it is needed if the total

        // bytes is not multiple of the blocksize, or if one wants

        // to get the final IV.

        virtual void Finish(TDes8& anIV)=0;

        virtual ~CSymmetricCipher() {}

    };

//

//	CProtocolCrypto

//		The algorithm manager (abstract) class

//

class CProtocolCrypto : public CProtocolBase

    {

    public:

        virtual TUint AlgorithmList(TAlgorithmDesc *&aList) = 0;

        virtual CSymmetricCipher* SymmetricCipher(TUint anAlg)=0;

        virtual COwnMessageDigest* MessageDigest(TUint anAlg)=0;

    protected:

        virtual ~CProtocolCrypto() {}

    };

#endif