// Copyright (c) 2006-2009 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:

//

/**

 @file testpadding.cpp

 @internalTechnology

*/

#include "testpadding.h"

#include <securityerr.h>

CTlsTestPadding* CTlsTestPadding::NewLC(TInt aBlockBytes, TInt aPaddingMod)

	{

	return new (ELeave) CTlsTestPadding(aBlockBytes, aPaddingMod);

	}

void CTlsTestPadding::DoPadL(const TDesC8& aInput,TDes8& aOutput)

	{

	TInt paddingBytes=BlockSize()-(aInput.Length()%BlockSize());

	aOutput.Append(aInput);

	aOutput.SetLength(aOutput.Length()+paddingBytes);

	for (TInt i=1;i<=paddingBytes;i++)

		{

		// apply the padding modifier to every byte in the padding

		aOutput[aOutput.Length()-i]=(TUint8)(paddingBytes+iPaddingMod-1);

		}

	}

void CTlsTestPadding::UnPadL(const TDesC8& aInput,TDes8& aOutput)

	{

	TInt paddingLen = aInput[aInput.Length()-1] + 1;

	if (paddingLen > aInput.Length())

		{

		User::Leave(KErrInvalidPadding);

		}

	// check the whole length of the padding is the same byte

	TPtrC8 padding = aInput.Right(paddingLen);

	for (TInt i = 0; i < paddingLen; ++i)

		{

		if (padding[i] != paddingLen)

			{

			User::Leave(KErrInvalidPadding);

			}

		}	

	TInt outlen = aInput.Length() - paddingLen;

	aOutput.Append(aInput.Left(outlen));

	}

TInt CTlsTestPadding::MinPaddingLength(void) const

	{

	return 1;

	}

TInt CTlsTestPadding::MaxPaddedLength(TInt aInputBytes) const

	{

	TUint padBytes = BlockSize() - (aInputBytes % BlockSize());

	return padBytes + aInputBytes;

	}

CTlsTestPadding::CTlsTestPadding(TInt aBlockBytes, TInt aPaddingMod)

	: CPadding(aBlockBytes), iPaddingMod(aPaddingMod)

	{

	}