/*

* Copyright (c) 2002 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:  Hashing tool

*

*/

// INCLUDE FILES

#include "PEngHashTool.h"

// #include <e32std.h>

#include <hash.h>

#include <imcvcodc.h>

#include "PEngStorageGlobals.h"

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

// PEngHashTool::HashDescriptorL()

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

//

HBufC* PEngHashTool::HashDescriptorL(

    const TDesC& aDesToHash )

    {

    HBufC8* temHashBuf = HBufC8::NewLC( aDesToHash.Length() + KMinimalHashSize );

    temHashBuf->Des().Copy( aDesToHash );

    temHashBuf->Des().LowerCase();

    CSHA1* sHA1 = CSHA1::NewL();

    CleanupStack::PushL( sHA1 );

    sHA1->Reset();

    TPtrC8 hash ( sHA1->Hash( *temHashBuf ) );

    TImCodecB64 b64;

    b64.Initialise();

    TPtr8 encodeBuffer( temHashBuf->Des() );

    encodeBuffer.Zero();

    b64.Encode( hash, encodeBuffer );

    HBufC* hashedId = HBufC::NewL( encodeBuffer.Length() );

    TPtr tmp( hashedId->Des() );

    tmp.Copy( encodeBuffer );

    CleanupStack::PopAndDestroy( 2 ); // sHA1, temHashBuf

    ReplaceCharacterInDescriptor( tmp, '/', '_' );

    ReplaceCharacterInDescriptor( tmp, ':', '_' );

    ReplaceCharacterInDescriptor( tmp, '@', '_' );

    return hashedId;

    }

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

// PEngHashTool::HashSubfolderL()

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

//

HBufC* PEngHashTool::HashStateNameL(

    const TDesC& aServerAddress,

    const TDesC& aUserName )

    {

    HBufC* address = HBufC::NewLC( aServerAddress.Length() + aUserName.Length() );

    address->Des().Append( aServerAddress );

    address->Des().Append( aUserName );

    address->Des().LowerCase();

    HBufC* folder = HashDescriptorL( *address );

    CleanupStack::PopAndDestroy();//address

    CleanupStack::PushL( folder );

    // KPEngStorageStateSuffix if client wants to attach some

    folder = folder->ReAllocL( folder->Length() +

                               KPEngStorageStateSuffix().Length() );

    CleanupStack::Pop(); // folder

    folder->Des().Append( KPEngStorageStateSuffix );

    return folder;

    }

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

// PEngHashTool::ReplaceCharacterInDescriptor()

// Replace characters in descriptor with defined

// (other items were commented in a header).

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

//

void PEngHashTool::ReplaceCharacterInDescriptor(

    TPtr& aDescriptor,

    const TText aConvertFrom,

    const TText aConvertTo  )

    {

    TInt offset;

    while ( ( offset = aDescriptor.Locate( aConvertFrom ) ) != KErrNotFound )

        {

        aDescriptor[ offset ] = aConvertTo;

        }

    }

//  End of File