--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcryptospi/source/symmetric/cbcmodeshim.cpp	Fri Nov 06 13:21:00 2009 +0200
@@ -0,0 +1,214 @@
+/*
+* Copyright (c) 2006-2009 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 "cbcmodeshim.h"
+
+#include <cryptopanic.h>
+#include <cryptospi/cryptospidef.h>
+#include <padding.h>
+#include "cryptosymmetriccipherapi.h"
+#include <cryptospi/plugincharacteristics.h>
+#include "../common/inlines.h"
+
+// CModeCBCEncryptorShim
+CModeCBCEncryptorShim::CModeCBCEncryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl) :
+	iSymmetricCipherImpl(aSymmetricCipherImpl)
+	{
+	}
+
+CModeCBCEncryptorShim* CModeCBCEncryptorShim::NewL(CBlockTransformation* aBT, const TDesC8& aIv)
+	{
+	CModeCBCEncryptorShim* self(0);
+	
+	// Check whether the block transform contains an SPI plug-in
+	TAny* implPtr(0);
+	TInt err = aBT->GetExtension(CryptoSpi::KSymmetricCipherInterface, implPtr, NULL);	
+	if (err == KErrNone && implPtr)
+		{
+		CryptoSpi::CSymmetricCipher* impl(static_cast<CryptoSpi::CSymmetricCipher*>(implPtr));
+		
+		const CryptoSpi::TCharacteristics* c(0);
+		impl->GetCharacteristicsL(c);
+	
+		const CryptoSpi::TSymmetricCipherCharacteristics* cipherCharacteristics(
+			static_cast<const CryptoSpi::TSymmetricCipherCharacteristics*>(c));
+			
+		// Verify that the plug-in supports CBC mode
+		if (err == KErrNone && 
+			cipherCharacteristics->IsOperationModeSupported(CryptoSpi::KOperationModeCBCUid))
+			{
+			// Set block transform to encrypt-cbc
+			impl->SetCryptoModeL(CryptoSpi::KCryptoModeEncryptUid);
+			impl->SetOperationModeL(CryptoSpi::KOperationModeCBCUid);
+			impl->SetIvL(aIv);		
+			self = new(ELeave) CModeCBCEncryptorShim(impl);
+			CleanupStack::PushL(self);
+			self->ConstructL(aBT, aIv);
+			CleanupStack::Pop(self);
+			}
+		}				
+	return self;
+	}
+
+void CModeCBCEncryptorShim::ConstructL(CBlockTransformation* aBT, const TDesC8& aIv)
+	{
+	CModeCBCEncryptor::ConstructL(aBT, aIv);
+	}
+
+void CModeCBCEncryptorShim::Reset()
+	{
+	iSymmetricCipherImpl->Reset();
+	}
+	
+TInt CModeCBCEncryptorShim::BlockSize() const
+	{
+	return BitsToBytes(iSymmetricCipherImpl->BlockSize());
+	}
+	
+TInt CModeCBCEncryptorShim::KeySize() const
+	{
+	return iSymmetricCipherImpl->KeySize();
+	}
+	
+void CModeCBCEncryptorShim::Transform(TDes8& aBlock) 
+	{
+	// This function will never get called if a buffered
+	// encryptor is used because Process and ProcessFinalL call
+	// iSymmetricCipherImpl directly
+	iBT->Transform(aBlock);	
+	}
+	
+void CModeCBCEncryptorShim::SetIV(const TDesC8& aIv)
+	{
+	TRAPD(err, iSymmetricCipherImpl->SetIvL(aIv));
+	if (err == KErrOverflow)
+		{
+		User::Panic(KCryptoPanic, ECryptoPanicInputTooLarge);
+		}
+	else if (err != KErrNone)
+		{
+		// SetIvL should only leave if the aIv is incorrect
+		User::Panic(KCryptoPanic, KErrArgument);
+		}
+	}
+
+TInt CModeCBCEncryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/)
+	{
+	TInt ret(KErrExtensionNotSupported);
+	
+	if (CryptoSpi::KSymmetricCipherInterface == aExtensionId)
+		{		
+		a0=iSymmetricCipherImpl;
+		ret=KErrNone;	
+		}		
+	return ret;
+	}		
+
+// CModeCBCDecryptorShim
+CModeCBCDecryptorShim::CModeCBCDecryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl) :
+	iSymmetricCipherImpl(aSymmetricCipherImpl)
+	{
+	}
+
+CModeCBCDecryptorShim* CModeCBCDecryptorShim::NewL(CBlockTransformation* aBT, const TDesC8& aIv)
+	{
+	CModeCBCDecryptorShim* self(0);
+	
+	// Check whether the block transform contains an SPI plug-in
+	TAny* implPtr(0);
+	TInt err = aBT->GetExtension(CryptoSpi::KSymmetricCipherInterface, implPtr, NULL);	
+	if (err == KErrNone && implPtr)
+		{
+		CryptoSpi::CSymmetricCipher* impl(static_cast<CryptoSpi::CSymmetricCipher*>(implPtr));
+		
+		const CryptoSpi::TCharacteristics* c(0);
+		impl->GetCharacteristicsL(c);
+	
+		const CryptoSpi::TSymmetricCipherCharacteristics* cipherCharacteristics(
+			static_cast<const CryptoSpi::TSymmetricCipherCharacteristics*>(c));
+			
+		// Verify that the plug-in supports CBC mode
+		if (err == KErrNone && 
+			cipherCharacteristics->IsOperationModeSupported(CryptoSpi::KOperationModeCBCUid))
+			{
+			// Set block transform to encrypt-cbc
+			impl->SetCryptoModeL(CryptoSpi::KCryptoModeDecryptUid);
+			impl->SetOperationModeL(CryptoSpi::KOperationModeCBCUid);
+			impl->SetIvL(aIv);				
+			self = new(ELeave) CModeCBCDecryptorShim(impl);
+			CleanupStack::PushL(self);
+			self->ConstructL(aBT, aIv);
+			CleanupStack::Pop(self);
+			}
+		}				
+	return self;
+	}
+
+void CModeCBCDecryptorShim::ConstructL(CBlockTransformation* aBT, const TDesC8& aIv)
+	{
+	CModeCBCDecryptor::ConstructL(aBT, aIv);
+	}
+	
+void CModeCBCDecryptorShim::Reset()
+	{
+	iSymmetricCipherImpl->Reset();
+	}
+	
+TInt CModeCBCDecryptorShim::BlockSize() const
+	{
+	return BitsToBytes(iSymmetricCipherImpl->BlockSize());
+	}
+	
+TInt CModeCBCDecryptorShim::KeySize() const
+	{
+	return iSymmetricCipherImpl->KeySize();
+	}
+
+void CModeCBCDecryptorShim::Transform(TDes8& aBlock) 
+	{
+	// This function will never get called if a buffered
+	// encryptor is used because Process and ProcessFinalL call
+	// iSymmetricCipherImpl directly
+	iBT->Transform(aBlock);	
+	}
+
+void CModeCBCDecryptorShim::SetIV(const TDesC8& aIv)
+	{
+	TRAPD(err, iSymmetricCipherImpl->SetIvL(aIv));
+	if (err == KErrOverflow)
+		{
+		User::Panic(KCryptoPanic, ECryptoPanicInputTooLarge);
+		}
+	else if (err != KErrNone)
+		{
+		// SetIvL should only leave if the aIv is incorrect
+		User::Panic(KCryptoPanic, KErrArgument);
+		}
+	}
+	
+TInt CModeCBCDecryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/)
+	{
+	TInt ret(KErrExtensionNotSupported);
+	
+	if (CryptoSpi::KSymmetricCipherInterface == aExtensionId)
+		{		
+		a0=iSymmetricCipherImpl;
+		ret=KErrNone;	
+		}		
+	return ret;
+	}