rtp/srtpstack/src/srtpmastersalt.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:03:15 +0200
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/*
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* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:    .
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*
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*/
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// INCLUDES
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#include <e32std.h>
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#include "srtpmasterkey.h"
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#include "srtpmastersalt.h"
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#include "srtpcryptocontext.h"
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#include "srtpdef.h"
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#include "srtputils.h"
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// ---------------------------------------------------------------------------
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// Two-phased constructor. Used when stream uses its own cryptographic context
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// 
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// ---------------------------------------------------------------------------
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//
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EXPORT_C CSRTPMasterSalt* CSRTPMasterSalt::NewL( const TDesC8& aKey, TUint aN_S )
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    {
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    CSRTPMasterSalt* self = CSRTPMasterSalt::NewLC( aKey, aN_S );
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    CleanupStack::Pop( self );        
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    return self;
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    }	
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// ---------------------------------------------------------------------------
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// Two-phased constructor. Used when stream uses its own cryptographic context
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// 
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// ---------------------------------------------------------------------------
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//
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EXPORT_C CSRTPMasterSalt* CSRTPMasterSalt::NewLC( const TDesC8& aKey, TUint aN_S )
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    {
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    CSRTPMasterSalt* self = new( ELeave )CSRTPMasterSalt ( aN_S );
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    CleanupStack::PushL( self );    
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    self->ConstructL( aKey );
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    return self;
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    }	
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// ---------------------------------------------------------------------------
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// CSRTPMasterSalt::CSRTPMasterSalt
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// ---------------------------------------------------------------------------
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//
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CSRTPMasterSalt::CSRTPMasterSalt( TUint aN_S ) :
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            iN_S( aN_S )
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            {
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            }
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// -----------------------------------------------------------------------------
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// CSRTPMasterSalt::ConstructL
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// -----------------------------------------------------------------------------
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//
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void CSRTPMasterSalt::ConstructL(  const TDesC8& aKey )
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	{
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    iKey = aKey.AllocL();
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    if(aKey.Length()>14)
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    	{
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    	TSRTPUtils::HexString( *iKey );	
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    	}
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	}
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// ---------------------------------------------------------------------------
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// CSRTPMasterSalt::~CSRTPMasterSalt
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// ---------------------------------------------------------------------------
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//
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CSRTPMasterSalt::~CSRTPMasterSalt( )
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    {
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    delete iKey;
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    }
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// ---------------------------------------------------------------------------
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// CSRTPMasterSalt::MasterSalt
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// ---------------------------------------------------------------------------
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//
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EXPORT_C  const TDesC8& CSRTPMasterSalt::MasterSalt() const
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    {
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    return *iKey;
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    }
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// ---------------------------------------------------------------------------
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// CSRTPMasterSalt::SaltLength
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// ---------------------------------------------------------------------------
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//
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EXPORT_C  TUint CSRTPMasterSalt::SaltLength() const
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    {
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    return iN_S;
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    }
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// ---------------------------------------------------------------------------
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// CSRTPMasterSalt::operator=
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// ---------------------------------------------------------------------------
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//
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 const CSRTPMasterSalt& CSRTPMasterSalt::operator=(const CSRTPMasterSalt& aSalt)
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    {
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    return aSalt;
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    }
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// ---------------------------------------------------------------------------
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// CSRTPMasterSalt::Valid()
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// ---------------------------------------------------------------------------
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//       
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EXPORT_C  TBool CSRTPMasterSalt::Valid() const
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    {    
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    if (iKey->Length() != KSRTPDefaultMasterSaltLength/8)
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        {
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        return EFalse;
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        }       
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    if (iN_S != KSRTPDefSessionSaltingKeyLength)
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        {
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        return EFalse;
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        }                   
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    return ETrue;
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    }    
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