realtimenetprots/sipfw/SIP/SIPSec/DigestPlugin/src/CSIPSecChallengeAKA.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:03:15 +0200
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permissions -rw-r--r--
Revision: 201003 Kit: 201005
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// Copyright (c) 2008-2009 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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// Name          : CSIPSecChallengeAKA.cpp
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// Part of       : SIPSec/DigestPlugin
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// Version       : SIP/6.0
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//
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#include "SipLogs.h"
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#include "CSIPSecChallengeAKA.h"
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#include "CSIPSecDigest.h"
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#include "CSIPSecSIMRecord.h"
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#include "CSIPSecDigestPlugin.h"
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#include "sipsecdigestcontext.h"
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#include "sipstrings.h"
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#include "sipstrconsts.h"
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#include <imcvcodc.h>
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// ============================ MEMBER FUNCTIONS ===============================
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// -----------------------------------------------------------------------------
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// CSIPSecChallengeAKA::CSIPSecAlgAKA
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// -----------------------------------------------------------------------------
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//
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CSIPSecChallengeAKA::CSIPSecChallengeAKA( CSIPSecDigest::TChallengeType aType,
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										  CSIPSecRequestData::TQop aQop ) :
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    CSIPSecChallengeMD5( aType, aQop )
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    {
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    }
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// -----------------------------------------------------------------------------
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// CSIPSecChallengeAKA::NewLC
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// -----------------------------------------------------------------------------
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//
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CSIPSecChallengeAKA*
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CSIPSecChallengeAKA::NewLC( CSIPSecDigest::TChallengeType aType,
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                            CSIPAuthenticateHeaderBase& aAuthenticateHeader,
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                            CSIPSecRequestData::TQop aQop )
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    {
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	CSIPSecChallengeAKA* self = new ( ELeave ) CSIPSecChallengeAKA( aType,
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																	aQop );
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	CleanupStack::PushL( self );
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	self->ConstructL( aAuthenticateHeader );
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	return self;
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	}
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// -----------------------------------------------------------------------------
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// CSIPSecChallengeAKA::~CSIPSecChallengeAKA
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// -----------------------------------------------------------------------------
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//
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CSIPSecChallengeAKA::~CSIPSecChallengeAKA()
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    {
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    }
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// -----------------------------------------------------------------------------
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// CSIPSecChallengeAKA::VerifyTypeL
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// -----------------------------------------------------------------------------
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//
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void CSIPSecChallengeAKA::VerifyTypeL( CSIPSecUserRecord::TType aType ) const
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	{
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	__ASSERT_ALWAYS( aType == CSIPSecUserRecord::EIMS,
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        			 User::Leave( KErrPermissionDenied ) );
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	}
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// -----------------------------------------------------------------------------
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// CSIPSecChallengeAKA::CreateUserRecordL
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// -----------------------------------------------------------------------------
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//
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CSIPSecUserRecord*
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CSIPSecChallengeAKA::CreateUserRecordL( const TDesC8& aRealm,
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										const MSIPSecUser& aUser,
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										TRegistrationId aRegistrationId,
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									    TTransactionId aTransactionId,
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									    TUint aResponseCode ) const
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	{
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	CSIPSecSIMRecord* record = CSIPSecSIMRecord::NewL( aRealm,
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													   aUser,
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													   aRegistrationId,
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													   aTransactionId );
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	record->UpdateMessageCounter( aResponseCode );
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	return record;
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	}
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// -----------------------------------------------------------------------------
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// CSIPSecChallengeAKA::SupportedAlgorithm
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// -----------------------------------------------------------------------------
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//
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RStringF CSIPSecChallengeAKA::SupportedAlgorithm()
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    {
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    return SIPStrings::StringF( SipStrConsts::EAKAv1MD5 );
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    }
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// -----------------------------------------------------------------------------
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// CSIPSecChallengeAKA::AlgorithmName
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// -----------------------------------------------------------------------------
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//
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RStringF CSIPSecChallengeAKA::AlgorithmName() const
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    {
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    return CSIPSecChallengeAKA::SupportedAlgorithm();
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    }
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// -----------------------------------------------------------------------------
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// CSIPSecChallengeAKA::ProcessResponseL
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// -----------------------------------------------------------------------------
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//
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TBool CSIPSecChallengeAKA::ProcessResponseL( TSIPSecDigestCtxSetup& aContext,
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									   	     TBool& aAskCredentials ) const
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    {
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    // AKA gets credentials from SIM card, not from MSIPSecUser
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    aAskCredentials = EFalse;
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	CSIPSecSIMRecord& userData =
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		static_cast< CSIPSecSIMRecord& >( aContext.UserData() );
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    if ( userData.IsValid() )
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    	{
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    	if ( userData.Failure() == CSIPSecSIMRecord::ESQN )
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            {
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            const TInt KBase64EncodedAutsLength = 20;
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			HBufC8* auts = HBufC8::NewLC( KBase64EncodedAutsLength );
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			TPtr8 autsPtr( auts->Des() );
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		    TImCodecB64 encoder;
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		    User::LeaveIfError( encoder.Encode( userData.AUTS(), autsPtr ) );
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            aContext.SetParamValueL( SipStrConsts::EAuts, *auts );
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            CleanupStack::PopAndDestroy( auts );
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            }
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        if ( userData.SecretData().Length() == 0 )
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            {
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            CalculateSecretDataA1L( aContext );
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            }
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        return EFalse;
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    	}
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    aContext.RequestUserCredentialsL();
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    return ETrue;
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    }
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// -----------------------------------------------------------------------------
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// CSIPSecChallengeAKA::ProcessRequestL
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// -----------------------------------------------------------------------------
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//
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void
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CSIPSecChallengeAKA::ProcessRequestL( TSIPSecDigestCtxProcess& aContext ) const
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    {
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    __SIP_LOG( "SIPSecChallAKA:ProcessRequestL" )
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    CSIPSecSIMRecord& userData =
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    	static_cast< CSIPSecSIMRecord& >( aContext.UserData() );
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    __ASSERT_ALWAYS ( userData.Failure() != CSIPSecSIMRecord::EPrivateIdentity,
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    				  User::Leave( KErrGeneral ) );
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    if ( userData.Failure() == CSIPSecSIMRecord::EMAC )
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        {
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        __SIP_LOG( "MAC failure, set empty nonce&response" )
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		aContext.SetParamWithEmptyValueL( SipStrConsts::ENonce );
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        aContext.SetParamWithEmptyValueL( SipStrConsts::EResponse );
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        }
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    else
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    	{
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    	if ( userData.Failure() == CSIPSecSIMRecord::ESQN &&
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    		 aContext.Parent().Plugin().EmptyResponseAfterSqnFailure() )
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    		{
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    		__SIP_LOG( "set empty response parameter after SQN" )
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    		aContext.SetParamWithEmptyValueL( SipStrConsts::EResponse );
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    		}
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    	else
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    		{
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    		CSIPSecChallengeMD5::ProcessRequestL( aContext );
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    		}
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        }
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    }