/*

* Copyright (c) 2000 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: Implementation of terminalsecurity components

*

*/

// INCLUDE FILES

#include <e32base.h>

#include <e32std.h>

#include <ecom/implementationproxy.h>

#include <SCPParamObject.h>

#include "SCPHistoryPlugin.h"

#include <SCPHistoryPluginLang.rsg>

#include "SCP_IDs.h"

// ============================= LOCAL FUNCTIONS  =============================

// ============================= MEMBER FUNCTIONS =============================

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::NewL

// Two-phased contructor

// (static, may leave)

// Status : Approved

// ----------------------------------------------------------------------------

//

CSCPHistoryPlugin* CSCPHistoryPlugin::NewL()

    {

    Dprint ( ( _L( "CSCPHistoryPlugin::NewL()" ) ) );

	CSCPHistoryPlugin* self = new ( ELeave ) CSCPHistoryPlugin();

	CleanupStack::PushL( self );

	self->ConstructL();

	CleanupStack::Pop( self );

    Dprint ( ( _L( "( 0x%x ) CSCPHistoryPlugin::NewL()" ), self ) );

    return self;

    }

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::CSCPHistoryPlugin

// Constructor

// Status : Approved

// ----------------------------------------------------------------------------

//

CSCPHistoryPlugin::CSCPHistoryPlugin()

    {

    Dprint ( ( _L( "CSCPHistoryPlugin::CSCPHistoryPlugin()" ) ) );

    return;

    }

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::ConstructL

// 2nd phase construction

// (may leave)

// Status : Approved

// ----------------------------------------------------------------------------

//

void CSCPHistoryPlugin::ConstructL()

    {        

    Dprint ( ( _L( "CSCPHistoryPlugin::ConstructL()" ) ) );

    return;

    }

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::HandleEvent

// 

// 

// Status : Approved

// ----------------------------------------------------------------------------

//    

	{				

	Dprint ( ( _L( "CSCPHistoryPlugin::HandleEvent()" ) ) );

	if ( iFs == NULL )

	    {

	    }	

        {

        case ( KSCPEventValidate ) :

            {            

           	// Obtain the paramValue

           	Dprint ( ( _L( "CSCPHistoryPlugin::KSCPEventValidate" ) ) );

			TInt passhistoryParamValue;

			passhistoryParamValue = GetHistoryCountParamValue();

			Dprint ( ( _L( "CSCPHistoryPlugin::HandleEvent passhistoryParamValue = %d" ), passhistoryParamValue ) );

			// if all required bounds are zero, there is nothing to do.

			if ( passhistoryParamValue != 0)

			    {

				// Get the configFile's path.

				// If this fails, there is something badly wrong(Private folder is not there)

				TInt errSCF = SetConfigFile ();

				if (errSCF != KErrNone)

				{

					break; // Break out from Case

				}

				// Get the historyItemCount, If the err is raised, the file is not there

				// This will lead to KSCPEventPasswordChanged event and new history file will

				// be created

				TInt historyItemCounter;

				TInt errHC = GetHistoryItemCount( historyItemCounter );

				Dprint ( ( _L( "CSCPHistoryPlugin::HandleEvent historyItemCounter = %d" ), historyItemCounter ) );

				if (errHC != KErrNone)

				{

					break; // Break out from Case

				}

				// continue with the KSCPEventValidate Check

				// Get the password from the paramObject

				TBuf<KSCPPasscodeMaxLength> seccode;

				if ( aParam.Get( KSCPParamPassword, seccode ) != KErrNone )

				{

					// Nothing to do anymore

					Dprint( (_L("CSCPHistoryPlugin::HandleEvent()\

					ERROR: KSCPEventValidate/KSCPParamPassword is != KErrNone") ));

					break; // Break out from Case

				}            

				// Hash  the securitycode	

				TBuf<KSCPPasscodeMaxLength> securityhash;

				iEventHandler->HashInput(seccode,securityhash);

				// get history

				CDesCArrayFlat* array = NULL;

				TInt errGH = KErrNone;

				array = new CDesCArrayFlat(1);			

				if ( array != NULL )

				    {

				    TRAPD( err2, errGH = GetHistoryArrayL( *array ) );

				    if ( err2 != KErrNone )

				        {

				        errGH = err2;

				        }

				    }

				else

				    {

				    errGH = KErrNoMemory;

				    }

				// If for some reason err is raised, break out

				// If the Historyonfig file get deleted on the fly ex

				if (errGH != KErrNone)

				    {

					array->Reset();

					delete array;

					break; // Break out from Case

				    }

				TInt correction;

				correction = 0;

				if ( array->Count() >=  passhistoryParamValue )

				// check for match

				TBuf<KSCPPasscodeMaxLength> arrayItem;

				// Set the historyobject

				for (TInt i= 0 + correction; i < array->Count(); i++)

				    {

					arrayItem =  array->MdcaPoint(i);

					if (arrayItem.Compare(securityhash) == KErrNone)

					    {

        // Someone has changed the Seccode and I need to include it to history

         case ( KSCPEventPasswordChanged ) :

			{																

			// Get the configFile's path.

			Dprint ( ( _L( "CSCPHistoryPlugin::KSCPEventPasswordChanged" ) ) );

			TInt errSCF = SetConfigFile ();

			if (errSCF != KErrNone)

			    {

				break; // Break out from the case

			    }

			// Get the password from the paramObject

     		TBuf<KSCPPasscodeMaxLength> securitycode;

            if ( aParam.Get( KSCPParamPassword, securitycode ) != KErrNone )

                {

            	// Nothing to do anymore

               	Dprint( (_L("CSCPHistoryPlugin::HandleEvent()\

               	ERROR: KSCPEventPasswordChanged/KSCPParamPassword is  != KErrNone") ));

				break; // Break out from the Case

                }          

			// Hash  the securitycode	

			TBuf<KSCPPasscodeMaxLength> securityhash;

			iEventHandler->HashInput(securitycode,securityhash);

			// Get the historyItemCount, If error occures, File is not there yet, Make one

			TInt historyItemCounter;

			TInt errHC = GetHistoryItemCount( historyItemCounter );

			Dprint ( ( _L( "CSCPHistoryPlugin::HandleEvent historyItemCounter = %d" ), historyItemCounter ) );

			if (errHC != KErrNone)

			    {

				// The file does not exist yet (should not happen)

				// Make the ParamObject,  Set the New historyData with count of 1

				CSCPParamObject* historyObject = NULL;

				TRAPD( err, historyObject = CSCPParamObject::NewL() );

		 		if ( err == KErrNone )

		 		    {

			 		historyObject->Set(KHistoryCounterParamID,1);

    				historyObject->Set(KHistoryItemParamBase,securityhash );

                    TRAPD( errWC, historyObject->WriteToFileL( iCfgFilenamepath, iFs ) );

					if ( errWC != KErrNone )

    					{

						Dprint( (_L("CSCPHistoryPlugin::HandleEvent(): WARNING:\

						failed to write plugin configuration: %d"), errWC ));

						break; // Break out from the Case

	    				}

					delete historyObject;

		 		    }

			    }

			// There are passwords avail.

			else

			    {

				// Append the new passwords

				TInt err = KErrNone;

				TRAPD( err2, err = AppendAndWriteSecurityCodeL( securityhash  ) );

				if ( ( err != KErrNone ) || ( err2 != KErrNone ) )

				    {

					break; // Break out from the Case						

				    }										

			    }    					

			break;

			} // end of KSCPEventPasswordChanged

    	case ( KSCPEventConfigurationQuery ):

            {            

            Dprint ( ( _L( "CSCPHistoryPlugin::KSCPEventConfigurationQuery" ) ) );

        	TInt paramID = -1; 

            // Get the ID from the paramObject      

            if ( aParam.Get( KSCPParamID, paramID ) != KErrNone )

                {

                // Nothing to do anymore

                break;

                }            

            // 1011

            if ( paramID == (RTerminalControl3rdPartySession::EPasscodeHistoryBuffer))

                {

				// All of our params are TInts

				TInt paramValue;

				if ( aParam.Get( KSCPParamValue, paramValue ) != KErrNone )

				    {

					break;

				    }

					TInt retStatus = KErrNone;

					switch ( paramID )

					    {

						case ( RTerminalControl3rdPartySession::EPasscodeHistoryBuffer ):

						    {

							// Bounds are be be

							if ( ( paramValue < KPasscodeHistoryBufferMinValue ) 

							|| ( paramValue > KPasscodeHistoryBufferMaxValue ) )                                 

							    {

								// This is not a valid valuerange

								retStatus = KErrArgument;

						        }     

						    break;				

						    } // end of case EPasscodeHistoryBuffer

					    } // end of switch ( paramID )

                    }

			 break;	            

	         } //End of KSCPEventConfigurationQuery Case

          case ( KSCPEventReset ):

              {

              Dprint ( ( _L( "CSCPHistoryPlugin::KSCPEventReset" ) ) );

              // Reset the configuration for this plugin.

              TRAP_IGNORE( FlushConfigFileL() );

              break;

              }

          } // End of  switch ( aID )

    }

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::SetEventHandler

// SetEventHandler

// 

// Status : Approved

// ----------------------------------------------------------------------------

//    

void CSCPHistoryPlugin::SetEventHandler( MSCPPluginEventHandler* aHandler )

	{

	Dprint ( ( _L( "CSCPHistoryPlugin::SetEventHandler()" ) ) );

	iEventHandler = aHandler;

	iFs = &(iEventHandler->GetFsSession());

	}	

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::~CSCPHistoryPlugin

// Destructor

// Status : Approved

// ----------------------------------------------------------------------------

//

CSCPHistoryPlugin::~CSCPHistoryPlugin()

    {

	Dprint( (_L("CSCPHistoryPlugin::~CSCPHistoryPlugin()") ));

	iRf.Close();   

	return;

    }

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::GetHistoryItemCount

// GetHistoryItemCount

// Status : Approved

// ----------------------------------------------------------------------------

//

TInt CSCPHistoryPlugin::GetHistoryItemCount( TInt& aHistoryCount )

    {

    Dprint ( ( _L( "CSCPHistoryPlugin::GetHistoryItemCount()" ) ) );

    // Make the ParamObject for success ack, 

    CSCPParamObject* historyObject = NULL;

    TRAPD( err, historyObject = CSCPParamObject::NewL() );

    if ( err != KErrNone )

        {

        return err;

        }

    TRAP( err, historyObject->ReadFromFileL( iCfgFilenamepath, iFs ) );

    if (  err != KErrNone  )

        {

    	// Something is wrong with the config file

    	// it is missing, caller will create new file

    	Dprint( (_L("CSCPHistoryPlugin::SetConfigFile:\

    	ERROR: Failed to ReadFromFileL: %d"), err ));

        }

    else

        {

    	historyObject->Get(KHistoryCounterParamID,aHistoryCount);

        }

	Dprint ( ( _L( "CSCPHistoryPlugin::GetHistoryItemCount aHistoryCount = %d" ), aHistoryCount ) );

    delete historyObject;

	return err;

    }

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::SetConfigFile

// SetConfigFile

// Status : Approved

// ----------------------------------------------------------------------------

//

TInt CSCPHistoryPlugin::SetConfigFile()

    {	

    Dprint ( ( _L( "CSCPHistoryPlugin::SetConfigFile()" ) ) );

	TRAPD( err, iEventHandler->GetStoragePathL( iCfgFilenamepath ) );

	if ( err != KErrNone )

	    {

		Dprint( (_L("CSCPHistoryPlugin::SetConfigFile:\

		ERROR: Failed to get storage path: %d"), err ));             

		return err;

	    }

	iCfgFilenamepath.Append( KConfigFile );

	return err;

    }

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::AppendSecurityCode

// AppendSecurityCode

// Status : Approved

// ----------------------------------------------------------------------------

//

TInt CSCPHistoryPlugin::AppendAndWriteSecurityCodeL ( TDes& aSecuritycode )

    {

    Dprint ( ( _L( "CSCPHistoryPlugin::AppendAndWriteSecurityCodeL()" ) ) );

	TInt err;

	err = KErrNone;

	TInt passhistoryParamValue;

	passhistoryParamValue = GetHistoryCountParamValue();

	Dprint ( ( _L( "CSCPHistoryPlugin::AppendAndWriteSecurityCodeL passhistoryParamValue = %d" ), passhistoryParamValue ) );

	if ( passhistoryParamValue == 0 )

	    {

	    // We must still save the currect password..

	    passhistoryParamValue = 1;

	    }

	// Make the ParamObject

	CSCPParamObject* historyObject = CSCPParamObject::NewL();

	CleanupStack::PushL( historyObject );

	// get history

	CDesCArrayFlat*  array = new (ELeave) CDesCArrayFlat(1);

	CleanupStack::PushL( array );

	err = GetHistoryArrayL( *array );

	// If for some reason err is raised, break out

	if (err != KErrNone)

	    {

		array->Reset();

		CleanupStack::PopAndDestroy( array );

		CleanupStack::PopAndDestroy( historyObject );

		return err;

	    }

	TBuf<KSCPPasscodeMaxLength> arrayItem;

  	// append the new pass to history to last index.  	

	array->AppendL( aSecuritycode );

	TInt correction;

	correction = 0;

	if ( array->Count() >=  passhistoryParamValue )

        {

        correction =  array->Count() - passhistoryParamValue;

        }    

  	// Set the historyobject

	for ( TInt i = 0 + correction; i <  array->Count(); i++ )

		{

        arrayItem =  array->MdcaPoint(i);

        historyObject->Set( KHistoryItemParamBase + i - correction, arrayItem );

        arrayItem.Zero();

		}

	// Set the historycount

	historyObject->Set(KHistoryCounterParamID, array->Count() - correction );

	// Write

	TRAP( err, historyObject->WriteToFileL( iCfgFilenamepath, iFs ) );

	if (  err != KErrNone  )

	    {

		Dprint( (_L("CSCPHistoryPlugin::AppendSecurityCode(): WARNING:\

		failed to write plugin configuration: %d"), err )); 

	    }

	// Kill the local array

	array->Reset();

	CleanupStack::PopAndDestroy( array );

	CleanupStack::PopAndDestroy( historyObject );

	return err;	

    }

// ----------------------------------------------------------------------------

// CSCPHistoryPlugin::GetHistoryArray

// Reads the historyconfig file and retrieves the history data

// Status : Approved

// ----------------------------------------------------------------------------

//

TInt CSCPHistoryPlugin::GetHistoryArrayL ( CDesCArrayFlat& array )

    {   

	Dprint( (_L("CSCPHistoryPlugin::GetHistoryArray()") ));

    TBuf<KSCPPasscodeMaxLength> arrayItem;

    TInt historyCount;

	// Make the ParamObject

	CSCPParamObject* historyObject = CSCPParamObject::NewL();

	CleanupStack::PushL( historyObject );

	TRAPD( err, historyObject->ReadFromFileL( iCfgFilenamepath, iFs ) );

	if ( err != KErrNone ) 

	    {

		// Reading from history fails. 

		Dprint( (_L("CSCPHistoryPlugin::GetHistoryArray():\

		failed to read plugin configuration: %d"), err )); 

		CleanupStack::PopAndDestroy( historyObject );

		return err;

	    }

	// Get the historyCount

	historyObject->Get(KHistoryCounterParamID,historyCount);

	Dprint ( ( _L( "CSCPHistoryPlugin::GetHistoryArrayL historyCount = %d" ), historyCount ) );

	// Loop them into array