/*

* Copyright (c) 2004-2009 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: 

*

*/

#include "tactionsetwritepfs.h"

#include "t_input.h"

#include <cryptostrength.h>

#include <pbedata.h>

#include <f32file.h>

#include <s32file.h>

#include <stdlib.h>

#include <s32mem.h>

#include <s32std.h>

_LIT8(KWritePFSStart, "<writepfs>");

_LIT8(KWritePFSEnd, "</writepfs>");

_LIT8(KInputStart, "<input>");

_LIT8(KInputEnd, "</input>");

_LIT8(KPasswdStart, "<passwd>");

_LIT8(KPasswdEnd, "</passwd>");

_LIT16(KWeakFileName, "\\tpbe\\weak.dat");

_LIT16(KStrongFileName, "\\tpbe\\strong.dat");

CTestAction* CActionSetWritePFS::NewL(RFs& aFs,

									   CConsoleBase& aConsole,

									   Output& aOut, 

									   const TTestActionSpec& aTestActionSpec)

	{

	CTestAction* self = CActionSetWritePFS::NewLC(aFs, aConsole,

		aOut, aTestActionSpec);

	CleanupStack::Pop();

	return self;

	}

CTestAction* CActionSetWritePFS::NewLC(RFs& aFs,

										CConsoleBase& aConsole,

										Output& aOut, 

										const TTestActionSpec& aTestActionSpec)

	{

	CActionSetWritePFS* self = new(ELeave) CActionSetWritePFS(aFs, aConsole, aOut);

	CleanupStack::PushL(self);

	self->ConstructL(aTestActionSpec);

	return self;

	}

CActionSetWritePFS::~CActionSetWritePFS()

	{

	delete iBody;

	}

CActionSetWritePFS::CActionSetWritePFS(RFs& aFs, 

								 CConsoleBase& aConsole,

								 Output& aOut)

: CTestAction(aConsole, aOut), iFs(aFs)

	{

	}

void CActionSetWritePFS::ConstructL(const TTestActionSpec& aTestActionSpec)

	{

	CTestAction::ConstructL(aTestActionSpec);

	iBody = HBufC8::NewL(aTestActionSpec.iActionBody.Length());

	iBody->Des().Copy(aTestActionSpec.iActionBody);

	}

void CActionSetWritePFS::DoPerformPrerequisite(TRequestStatus& aStatus)

	{

	TRequestStatus* status = &aStatus;

	TInt err = KErrNone;

	TInt pos = 0;

	TPtrC8 encryptElement = Input::ParseElement(*iBody, KWritePFSStart,

		KWritePFSEnd, pos, err);

	TPtrC8 passwdTemp = Input::ParseElement(encryptElement, KPasswdStart, 

		KPasswdEnd, pos=0, err);

	iPasswd = HBufC::NewL(passwdTemp.Length());

	TPtr16 passwdTemp3( iPasswd->Des());

	passwdTemp3.Copy(passwdTemp);

	TPtrC8 inputTemp = Input::ParseElement(encryptElement, KInputStart, 

		KInputEnd, pos=0, err);

	iInput = HBufC8::NewL(inputTemp.Length());

	*iInput = inputTemp;

	User::RequestComplete(status, KErrNone);

	iActionState = CTestAction::EAction;

	}

void CActionSetWritePFS::DoPerformPostrequisite(TRequestStatus& aStatus)

	{

	TRequestStatus* status = &aStatus;

	delete iPasswd;

	delete iInput;

	iFinished = ETrue;

	User::RequestComplete(status, KErrNone);

	}

void CActionSetWritePFS::DoReportAction(void)

	{

	}

void CActionSetWritePFS::DoCheckResult(TInt)

	{

	}

void CActionSetWritePFS::PerformAction(TRequestStatus& aStatus)

	{

	__UHEAP_MARK;

	TRequestStatus* status = &aStatus;

	iResult = EFalse;

	CPBEncryptSet* set = CPBEncryptSet::NewL(*iPasswd);

	CleanupStack::PushL(set);

	CPBEncryptor* encryptor = set->NewEncryptLC();

	HBufC8* ciphertextTemp = HBufC8::NewLC(encryptor->MaxFinalOutputLength(iInput->Length())); 

	TPtr8 ciphertext = ciphertextTemp->Des();	

	encryptor->ProcessFinalL(*iInput, ciphertext);

	TInt cipherTextLength = set->MaxCiphertextLength(iInput->Length());

	TInt plainTextLength = set->MaxPlaintextLength(cipherTextLength);

	if (plainTextLength > cipherTextLength)

		{

		iResult = EFalse;

		}

	//Change the password by appending the letter 'a' to it

	HBufC* newPasswordTemp = HBufC::NewMaxLC(iPasswd->Length()+1);

	TPtr newPassword = newPasswordTemp->Des();

	newPassword.Copy(*iPasswd);

	newPassword.Append('a');

	set->ChangePasswordL(newPassword);

	TDriveUnit sysDrive (RFs::GetSystemDrive());

	TBuf<128> pfsFileName (sysDrive.Name());

	if (TCrypto::Strength() == TCrypto::EStrong)

		pfsFileName.Append(KStrongFileName);

	else

		pfsFileName.Append(KWeakFileName);

	RStoreWriteStream write;

	CFileStore *store = CPermanentFileStore::ReplaceLC(iFs, pfsFileName, EFileRead | EFileWrite);

	store->SetTypeL(store->Layout());

	//write the encrypted master key to a new stream

	write.CreateLC(*store);

	write << set->EncryptedMasterKey();

	write.CommitL();

	CleanupStack::PopAndDestroy(); //CreateLC()

	//write the encryption data to a new stream

	write.CreateLC(*store);

	set->EncryptionData().ExternalizeL(write);

	write.CommitL();

	CleanupStack::PopAndDestroy(); //CreateLC()

	//write the cyphertext to a new stream

	write.CreateLC(*store);

	write << ciphertext;

	write.CommitL();

	CleanupStack::PopAndDestroy(); //CreateLC()

	store->Commit();

	// Finished writing the PFS

	iResult = ETrue;

	CleanupStack::PopAndDestroy(store);

	CleanupStack::PopAndDestroy(newPasswordTemp);

	CleanupStack::PopAndDestroy(ciphertextTemp);

	CleanupStack::PopAndDestroy(encryptor);

	CleanupStack::PopAndDestroy(set);

	User::RequestComplete(status, KErrNone);

	iActionState = CTestAction::EPostrequisite;

	__UHEAP_MARKEND;

	}

void CActionSetWritePFS::Hex(HBufC8& aString)

    {

    TPtr8 ptr=aString.Des();

    if (aString.Length()%2)

        {

        ptr.SetLength(0);

        return;

        }

    TInt i;

    for (i=0;i<aString.Length();i+=2)

        {

        TUint8 tmp;

        tmp=(TUint8)(aString[i]-(aString[i]>'9'?('A'-10):'0'));

        tmp*=16;

        tmp|=(TUint8)(aString[i+1]-(aString[i+1]>'9'?('A'-10):'0'));

        ptr[i/2]=tmp;

        }

    ptr.SetLength(aString.Length()/2);

    }