--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcryptospi/source/symmetric/cbcmode.cpp	Fri Nov 06 13:21:00 2009 +0200
@@ -0,0 +1,170 @@
+/*
+* Copyright (c) 2002-2009 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: 
+*
+*/
+
+
+#include <cbcmode.h>
+
+#include "cbcmodeshim.h"
+#include "../common/inlines.h"
+
+void CBlockChainingMode::Reset()
+	{
+	iRegister.Copy(iIV);
+	iBT->Reset();
+	}
+
+TInt CBlockChainingMode::BlockSize() const
+	{
+	return (iBT->BlockSize());
+	}
+
+TInt CBlockChainingMode::KeySize() const
+	{
+	return (iBT->KeySize());
+	}
+
+void CBlockChainingMode::SetIV(const TDesC8& aIV)
+	{
+	//We are making the stipulation that anybody calling SetIV is not setting it
+	//to a longer IV than they originally did.  Otherwise SetIV needs to leave.
+	assert(aIV.Size() <= iIV.Size());
+	iIV.Copy(aIV);
+	Reset();
+	}
+
+EXPORT_C CBlockChainingMode::CBlockChainingMode() 
+	: iBT(NULL), iRegister(0,0,0), iIV(0,0,0)
+	{
+	}
+
+EXPORT_C CBlockChainingMode::~CBlockChainingMode()
+	{
+	delete iBT;
+	delete iRegisterBuf;
+	delete iIVBuf;
+	}
+
+EXPORT_C void CBlockChainingMode::ConstructL(CBlockTransformation* aBT, const TDesC8& aIV)
+	{
+	iRegisterBuf = aIV.AllocL();
+	iRegister.Set(iRegisterBuf->Des());
+	iIVBuf = aIV.AllocL();
+	iIV.Set(iIVBuf->Des());
+
+	// Take ownership last - doesn't take ownership if we leave
+	iBT = aBT;
+	}
+
+/* CModeCBCEncryptor */
+EXPORT_C CModeCBCEncryptor* CModeCBCEncryptor::NewL(CBlockTransformation* aBT, 
+	const TDesC8& aIV)
+	{	
+	CModeCBCEncryptor* self = CModeCBCEncryptorShim::NewL(aBT, aIV);
+	if (! self)
+		{			
+		// not able to use CryptoSpi, possibly due to an exterally 
+		// derived legacy class so fallback to old implementation.			
+		self = NewLC(aBT,aIV);
+		CleanupStack::Pop(self);
+		}	
+	return self;	
+	}
+
+EXPORT_C CModeCBCEncryptor* CModeCBCEncryptor::NewLC(CBlockTransformation* aBT,
+	const TDesC8& aIV)
+	{
+	CModeCBCEncryptor* self = new (ELeave)CModeCBCEncryptor();	
+	CleanupStack::PushL(self);
+	self->ConstructL(aBT, aIV);
+	return self;
+	}
+
+CModeCBCEncryptor::CModeCBCEncryptor()
+	{
+	}
+
+void CModeCBCEncryptor::Transform(TDes8& aBlock)
+	{
+	assert(aBlock.Size() == iBT->BlockSize());
+	assert(iRegister.Size() == aBlock.Size());
+
+	XorBuf(const_cast<TUint8*>(iRegister.Ptr()), aBlock.Ptr(), aBlock.Size());
+	iBT->Transform(iRegister);
+	aBlock.Copy(iRegister);
+	}
+
+/* CModeCBCDecryptor */
+EXPORT_C CModeCBCDecryptor* CModeCBCDecryptor::NewL(CBlockTransformation* aBT, 
+	const TDesC8& aIV)
+	{
+	CModeCBCDecryptor* self = CModeCBCDecryptorShim::NewL(aBT, aIV);
+	if (! self)
+		{			
+		// not able to use CryptoSpi, possibly due to an exterally 
+		// derived legacy class so fallback to old implementation.			
+		self = NewLC(aBT,aIV);
+		CleanupStack::Pop(self);
+		}	
+	return self;	
+	}
+
+EXPORT_C CModeCBCDecryptor* CModeCBCDecryptor::NewLC(CBlockTransformation* aBT, 
+	const TDesC8& aIV)
+	{
+	CModeCBCDecryptor* self = new (ELeave)CModeCBCDecryptor();	
+	CleanupStack::PushL(self);
+	self->ConstructL(aBT, aIV);
+	return self;	
+	}
+
+void CModeCBCDecryptor::ConstructL(CBlockTransformation* aBT, const TDesC8& aIV)
+	{
+	iIVBakBuf = aIV.AllocL();
+	iIVBak.Set(iIVBakBuf->Des());
+	CBlockChainingMode::ConstructL(aBT, aIV);
+	}
+
+CModeCBCDecryptor::~CModeCBCDecryptor(void)
+	{
+	delete iIVBakBuf;
+	}
+
+CModeCBCDecryptor::CModeCBCDecryptor()
+	: iIVBak(0,0,0)
+	{
+	}
+
+void CModeCBCDecryptor::Transform(TDes8& aBlock)
+	{
+	assert(aBlock.Size() == iBT->BlockSize());
+	assert(iRegister.Size() == aBlock.Size());
+	assert(iIVBak.Size() == aBlock.Size());
+	
+	// Take a copy of incoming block
+	iIVBak.Copy(aBlock);
+
+	// transform the block
+	iBT->Transform(aBlock);
+
+	// xor the output with the register
+	XorBuf(const_cast<TUint8*>(aBlock.Ptr()), iRegister.Ptr(), 
+		aBlock.Size());
+
+	// Update the register to be the original block
+	iRegister.Copy(iIVBak);
+}
+