/*

* Copyright (c) 2002-2009 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

 @publishedPartner

 @released

*/

#ifndef __PKCS12KDF_H__

#define __PKCS12KDF_H__

#include <e32std.h>

class PKCS12KDF

/**

	Namespace class contains static functions which

	are used to generate a key for PKCS#12 operations.

	See Section B from PKCS 12 v1.0.

 */

	{

public:

	enum TIDByteType

	/**

		ID byte value used to generate (en|de)cryption key,

		IV, or MAC key.  See SB.3 of spec.

	 */

		{

		/** Generates a key for (en|de)cryption. */

		EIDByteEncryptKey = 1,

		/** Generates an initialization vector. */

		EIDByteIV = 2,

		/** Generates a key for MAC-ing. */

		EIDByteMACKey = 3

		};

public:

	IMPORT_C static void DeriveKeyL(

		TDes8& aKey, TIDByteType aIDType,

		const TDesC8& aPasswd, const TDesC8& aSalt, const TUint aIterations);

	IMPORT_C static HBufC8* GeneratePasswordLC(const TDesC& aDes);

private:

	static void Process6cL(TDes8& Ij, const TDesC8& B, TInt v);

#ifdef _DEBUG

	enum TPanic

		{

		EDKEmptyPswd = 0x10, EDKOddPswdByteCount, EDKBadNullTerminator

		};

	static void Panic(TPanic aPanic);

#endif

	// not implemented - prevents instantiation

	PKCS12KDF();

	};

#endif	// #ifndef __PKCS12KDF_H__