/*

* Copyright (c) 2001-2009 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: Implementation of class CWPASecuritySettingsImpl.     

*

*/

/*

* %version: tr1cfwln#29 %

*/

// INCLUDE FILES

#include "WPASecuritySettingsUiPanic.h"

#include "WPASecuritySettingsUI.hrh"

#include <WPASecuritySettingsUI.h>

#include <commdb.h>

#include <EAPPluginConfigurationIf.h>

#include "WPASecuritySettingsImpl.h"

#include <commsdattypesv1_1.h>

#include <cmmanagertablefields.h>

#include <wlancontainer.h>

// CONSTANTS

LOCAL_D const TUint32 KUidNone = 0;     // Invalid id

LOCAL_D const TUint32 E8021X = 4;       // 802.1X security mode

LOCAL_D const TUint32 EWpa = 8;         // Wpa security mode

LOCAL_D const TUint32 EWpa2 = 16;       // Wpa2 only security mode

LOCAL_D const TUint32 KExpEapTypeLength = 8;    // expanded EAP type length

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

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

// CWPASecuritySettingsImpl::NewL

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

//

CWPASecuritySettingsImpl* CWPASecuritySettingsImpl::NewL( 

                                                TSecurityMode aSecurityMode )

    {

    CWPASecuritySettingsImpl* settings = new ( ELeave ) 

                                    CWPASecuritySettingsImpl( aSecurityMode );

    CleanupStack::PushL( settings );

    settings->ConstructL();

    CleanupStack::Pop( settings ); 

    return settings;    

    }

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

// CWPASecuritySettingsImpl::CWPASecuritySettingsImpl

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

//

CWPASecuritySettingsImpl::CWPASecuritySettingsImpl( 

                                                TSecurityMode aSecurityMode )

: iSecurityMode( aSecurityMode ),

  iWPAMode( EFalse ),

  iWpa2Only( EFalse ),

  iWPAUnencryptedConn( EFalse )

    {

    iWPAEAPPlugin.Zero();

    iWPAPreSharedKey.Zero();

    }

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

// CWPASecuritySettingsImpl::ConstructL

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

//

void CWPASecuritySettingsImpl::ConstructL()

    {

    _LIT8( KMatchString, "EAPPConfig" );

	TRAPD( err, iPlugin = CEAPPluginConfigurationIf::NewL( KMatchString ) );

    if ( err != KErrNone && err != KEComErrNoInterfaceIdentified )

        {

        User::Leave( err );

        }

    }

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

// CWPASecuritySettingsImpl::~CWPASecuritySettingsImpl

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

//

CWPASecuritySettingsImpl::~CWPASecuritySettingsImpl()

    {

    delete iWPAEnabledEAPPlugin;

    delete iWPADisabledEAPPlugin;

    delete iPlugin;

    }

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

// CWPASecuritySettingsImpl::LoadL

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

//

void CWPASecuritySettingsImpl::LoadL( TUint32 aIapId, 

                                      CCommsDatabase& aCommsDb )

    {

    if ( aIapId == KUidNone )

        {

        return;

        }

    CCommsDbTableView* wLanServiceTable;

    wLanServiceTable = aCommsDb.OpenViewMatchingUintLC(

                    TPtrC( WLAN_SERVICE ), TPtrC( WLAN_SERVICE_ID ), aIapId );

    TInt errorCode = wLanServiceTable->GotoFirstRecord();

    if ( errorCode == KErrNone )

        {

        if ( iSecurityMode == ESecurityMode8021x )

            {

            // in 802.1x PSK mode is not supported

            iWPAMode = EFalse;

            }

        else

            {

            // Get WPA Mode

            TRAPD( err, wLanServiceTable->ReadUintL( TPtrC( WLAN_ENABLE_WPA_PSK ),

                                                    ( TUint32& ) iWPAMode ) );

            if ( err != KErrNone )

                { // do not leave if value is not present in table...

                if ( err != KErrUnknown )

                    User::Leave( err );

                }

            }

        TUint32 secMode = 0;

        // Get WPA2 Only Mode

        TRAPD( err, wLanServiceTable->ReadUintL( TPtrC( WLAN_SECURITY_MODE ),

                                                 secMode ) );

        if ( err != KErrNone )

            { // do not leave if value is not present in table...

            if ( err != KErrUnknown )

                User::Leave( err );

            }

        iWpa2Only = secMode == EWpa2;

        // Get Unencrypted Connection mode for 802.1x

        if ( iSecurityMode == ESecurityMode8021x )

            {

            // WLAN_WPA_KEY_LENGTH is used also for Unencrypted Connection mode

            TRAPD( err2, wLanServiceTable->ReadUintL( TPtrC( WLAN_WPA_KEY_LENGTH ),

                                                ( TUint32& ) iWPAUnencryptedConn ) );

            if ( err2 != KErrNone )

                { // do not leave if value is not present in table...

                if ( err2 != KErrUnknown )

                    User::Leave( err2 );

                }

            }

        // Get EAP list

    	iWPAEAPPlugin.Copy( *wLanServiceTable->ReadLongTextLC( 

                                                        TPtrC( WLAN_EAPS ) ) );

	    CleanupStack::PopAndDestroy();

	    if ( !iWPAEAPPlugin.Length() )

	        {

	        // no data found in the old column, use the new ones

	        // enabled EAP types

	        HBufC *data = wLanServiceTable->ReadLongTextLC( 

	                                              TPtrC( WLAN_ENABLED_EAPS ) );

            TPtrC8 reint( reinterpret_cast<const TUint8*>( data->Ptr() ), 

	                                                       data->Size() );

        	delete iWPAEnabledEAPPlugin; iWPAEnabledEAPPlugin = NULL;

        	iWPAEnabledEAPPlugin = reint.AllocL();

            CleanupStack::PopAndDestroy( data );

            // 2. disabled EAP types

            data = wLanServiceTable->ReadLongTextLC( 

	                                             TPtrC( WLAN_DISABLED_EAPS ) );

            reint.Set( reinterpret_cast<const TUint8*>( data->Ptr() ), 

	                                                    data->Size() );

        	delete iWPADisabledEAPPlugin; iWPADisabledEAPPlugin = NULL;

        	iWPADisabledEAPPlugin = reint.AllocL();

	        CleanupStack::PopAndDestroy( data );

	        }

	    else

	        {

	        // generate appropriate entries in the new enabled and disabled list,

	        // overwriting those values 

	        // count the + and - signs to determine the size of enabled and 

	        // disabled descriptors

	        TLex lex( iWPAEAPPlugin );

	        TInt numPlus = 0;

	        TInt numMinus = 0;

	        TChar ch;

	        while ( !lex.Eos() )

	            {

	            ch = lex.Get();

	            if ( ch == '+' ) ++numPlus;

	            else if ( ch == '-' ) ++numMinus;

	            }

            // each entry consumes 8 bytes in binary format

            delete iWPAEnabledEAPPlugin; iWPAEnabledEAPPlugin = NULL;

            iWPAEnabledEAPPlugin = HBufC8::NewL( 8 * numPlus );

            delete iWPADisabledEAPPlugin; iWPADisabledEAPPlugin = NULL;

            iWPADisabledEAPPlugin = HBufC8::NewL( 8 * numMinus );

            lex.Assign( iWPAEAPPlugin );

            while ( !lex.Eos() )

                {

                // beginning of implementation UID

                TInt16 implUid = 0;

                if ( lex.Val( implUid ) != KErrNone || !implUid )

                    {

                    // if the old string is corrupted, null out both lists

                    iWPAEnabledEAPPlugin->Des().Zero();

                    iWPADisabledEAPPlugin->Des().Zero();

                    break;

                    }

                // append it to the appropriate list ('+' enabled, '-' disabled)

                _LIT8( KPadding, "\xFE\0\0\0\0\0\0" );

                _LIT8( KMsChapV2Padding, "\xFE\xFF\xFF\xFF\0\0\0");

                const TInt KPlainMsChapV2ImplUid = 99;

                if ( implUid > 0 )

                    {

                    iWPAEnabledEAPPlugin->Des().Append( 

                                        Abs( implUid ) == KPlainMsChapV2ImplUid? 

                                                    KMsChapV2Padding: KPadding );

                    iWPAEnabledEAPPlugin->Des().Append( Abs( implUid ) );

                    }

                else if (implUid < 0 )

                    {

                    iWPADisabledEAPPlugin->Des().Append( 

                                        Abs( implUid ) == KPlainMsChapV2ImplUid? 

                                                    KMsChapV2Padding: KPadding );

                    iWPADisabledEAPPlugin->Des().Append( Abs( implUid ) );

                    }

                // swallow the delimiter (',')

                lex.Get();

                }

            // finally, wipe old column data

            iWPAEAPPlugin.Zero();

	        }

        // Get PreShared Key

	    if ( iSecurityMode != ESecurityMode8021x )

	        {

            wLanServiceTable->ReadTextL( TPtrC( WLAN_WPA_PRE_SHARED_KEY ), 

                                    iWPAPreSharedKey );

	        }

        if ( !IsValidPsk( iWPAPreSharedKey ) )

            {       

            // invalid key format

            iWPAPreSharedKey.Zero();

            }

        }

    CleanupStack::PopAndDestroy( wLanServiceTable );  // wLanServiceTable

    }

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

// CWPASecuritySettingsImpl::SaveL

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

//

void CWPASecuritySettingsImpl::SaveL( TUint32 aIapId, 

                                      CCommsDatabase& aCommsDb,

                                      TTypeOfSaving aTypeOfSaving,

                                      TUint32 aOldIapId )

    {

    CCommsDbTableView* wLanServiceTable;

    // Caller MUST initiate a transaction, WE WILL NOT.

    wLanServiceTable = aCommsDb.OpenViewMatchingUintLC( 

                    TPtrC( WLAN_SERVICE ), TPtrC( WLAN_SERVICE_ID ), aIapId );

    TInt errorCode = wLanServiceTable->GotoFirstRecord();

    if ( errorCode == KErrNone )

        {

        wLanServiceTable->UpdateRecord();

        }

    else

        {

        TUint32 dummyUid( KUidNone );

        User::LeaveIfError( wLanServiceTable->InsertRecord( dummyUid ) );

        // Save link to LAN service

        wLanServiceTable->WriteUintL( TPtrC( WLAN_SERVICE_ID ), aIapId );

        }

    // Save WPA Mode

    if ( iSecurityMode != ESecurityMode8021x )

        {

        wLanServiceTable->WriteUintL( TPtrC( WLAN_ENABLE_WPA_PSK ), 

                                  ( TUint32& ) iWPAMode );

        }

    TUint32 secMode;

    if ( iSecurityMode == ESecurityMode8021x )

        {

        secMode = E8021X;

        }

    else if ( iWpa2Only )

        {

        secMode = EWpa2;

        }

    else

        {

        secMode = EWpa;

        }

    // Save security mode

    wLanServiceTable->WriteUintL( TPtrC( WLAN_SECURITY_MODE ), secMode );

    // With expanded EAP types allowed we no longer need the old column

    iWPAEAPPlugin.Zero(); 

    // Save EAP list

    wLanServiceTable->WriteLongTextL( TPtrC( WLAN_EAPS ), iWPAEAPPlugin );

    // Save the expanded EAPs

    wLanServiceTable->WriteTextL( TPtrC( WLAN_ENABLED_EAPS ), 

                                  iWPAEnabledEAPPlugin? 

                                        (const TDesC8&)*iWPAEnabledEAPPlugin: 

                                        (const TDesC8&)KNullDesC8 );

    wLanServiceTable->WriteTextL( TPtrC( WLAN_DISABLED_EAPS ), 

                                  iWPADisabledEAPPlugin? 

                                        (const TDesC8&)*iWPADisabledEAPPlugin: 

                                        (const TDesC8&)KNullDesC8 );

    if ( iSecurityMode == ESecurityMode8021x )

        {

        // In 802.1x WpaKeyLength is not used 

        // and the field is reused to save UnencryptedConn mode

        wLanServiceTable->WriteUintL( TPtrC( WLAN_WPA_KEY_LENGTH ), 

                                      ( TUint32& ) iWPAUnencryptedConn );

        }

    else

        {

        // Save PreShared Key

        wLanServiceTable->WriteTextL( TPtrC( WLAN_WPA_PRE_SHARED_KEY ), 

                                  iWPAPreSharedKey );

        // Save PreShared Key Length

        wLanServiceTable->WriteUintL( TPtrC( WLAN_WPA_KEY_LENGTH ), 

                                        iWPAPreSharedKey.Length() );

        }

    wLanServiceTable->PutRecordChanges();

    if ( iPlugin )

        {

        if ( aTypeOfSaving == ESavingBrandNewAP )

            {

            iPlugin->ChangeIapIDL( aOldIapId, aIapId );

            }

        else if ( aTypeOfSaving == ESavingNewAPAsACopy )

            {

            iPlugin->CopySettingsL( aOldIapId, aIapId );

            }

        }

    CleanupStack::PopAndDestroy( wLanServiceTable );  // wLanServiceTable

    }

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

// CWPASecuritySettingsImpl::DeleteL

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

//

void CWPASecuritySettingsImpl::DeleteL( TUint32 aIapId )

    {

    if ( iPlugin )

        {

        iPlugin->DeleteSettingsL( aIapId );

        }

    }

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

// CWPASecuritySettingsImpl::IsValid

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

//

TBool CWPASecuritySettingsImpl::IsValid()

    {

    TBool retval = ETrue;

    if ( iWPAMode || !iPlugin )

        {

        retval = IsValidPsk( iWPAPreSharedKey );

        }

    return retval;

    }

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

// CWPASecuritySettingsImpl::IsValidPsk

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

//

TBool CWPASecuritySettingsImpl::IsValidPsk( const TDesC8& aPsk )

    {

    TBool ret( EFalse );

    TInt len = aPsk.Length();

    ret = ( len >= EMinLengthOfPreSharedKeyAscii && 

            len <= EMaxLengthOfPreSharedKeyAscii );

    if ( !ret && len == ELengthOfPreSharedKeyHex )

        {

        // perhaps it is hex

        ret = ETrue;

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

            {

            TChar ch( aPsk[i] );

            if ( !ch.IsHexDigit() )

                {

                // got a bad character

                ret = EFalse;

                break;

                }

            }

        }

    return ret;

    }

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

// CWPASecuritySettingsImpl::SetWPAPreSharedKey

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

//

TInt CWPASecuritySettingsImpl::SetWPAPreSharedKey( 

                                                const TDesC& aPreSharedKey )

    {

    TInt ret( KErrNone );

    HBufC8* buf8 = HBufC8::New( aPreSharedKey.Length() );

    if ( buf8 )

        {

        TPtr8 pskPtr( buf8->Des() );

        pskPtr.Copy( aPreSharedKey ); 

        if ( IsValidPsk( pskPtr ) )

            {

            SetWPAPreSharedKey( pskPtr );

            SetWPAMode( ETrue );

            }

        else

            {

            ret = KErrArgument;

            }

        delete buf8;

        }

    else

        {

        ret = KErrNoMemory;

        }

    return ret;

    }

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

// CWPASecuritySettingsImpl::SetWPAEnabledEAPPlugin

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

//

TInt CWPASecuritySettingsImpl::SetWPAEnabledEAPPlugin( 

                                             const TDesC8& aEnabledPluginList )

	{

	delete iWPAEnabledEAPPlugin; iWPAEnabledEAPPlugin = NULL;

    if ( aEnabledPluginList.Length() % KExpEapTypeLength )

        {

        // valid expanded EAP types occupy 8 bytes each

        return KErrArgument;

        }

	if ( aEnabledPluginList.Length() )

	    {

	    iWPAEnabledEAPPlugin = aEnabledPluginList.Alloc();

	    if ( !iWPAEnabledEAPPlugin )

	        {

	        return KErrNoMemory;

	        }

	    }

	return KErrNone;

	}