--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/cryptoplugins/cryptospiplugins/source/softwarecrypto/rc2impl.h Fri Nov 06 13:21:00 2009 +0200
@@ -0,0 +1,118 @@
+/*
+* 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:
+*
+*/
+
+
+#ifndef __RC2_H__
+#define __RC2_H__
+
+/**
+@file
+@internalComponent
+@released
+*/
+
+#include <e32base.h>
+#include <e32cmn.h>
+#include "keys.h"
+#include "symmetriccipherimpl.h"
+
+/**
+Plug-in class for RC2 block cipher
+*/
+namespace SoftwareCrypto
+ {
+ using namespace CryptoSpi;
+
+ NONSHARABLE_CLASS(CRc2Impl) : public CSymmetricBlockCipherImpl
+ {
+ public:
+ /**
+ Creates an instance of an RC2 symmetric cipher plug-in.
+ @param aKey The key
+ @param aCryptoMode Whether to encrypt or decrypt
+ @param aOperationMode The block cipher mode ECB, CBC, CTR etc
+ @param aPadding The padding scheme to use None, SSLv3, PKCS#7
+ @param aEffectiveKeyLenBits The effective key length in bits
+ @return A pointer to a CRc2Impl instance
+ */
+ static CRc2Impl* NewL(const CKey& aKey,
+ TUid aCryptoMode, TUid aOperationMode, TUid aPadding, TInt aEffectiveKeyLenBits);
+
+ /**
+ Creates an instance of an RC2 symmetric cipher plug-in.
+ A pointer to the plug-in instance is placed on the cleanup stack.
+ @param aKey The key
+ @param aCryptoMode Whether to encrypt or decrypt
+ @param aOperationMode The block cipher mode ECB, CBC, CTR etc
+ @param aPadding The padding scheme to use None, SSLv3, PKCS#7
+ @param aEffectiveKeyLenBits The effective key length in bits
+ @return A pointer to a CRc2Impl instance
+ */
+ static CRc2Impl* NewLC(const CKey& aKey,
+ TUid aCryptoMode, TUid aOperationMode, TUid aPadding, TInt aEffectiveKeyLenBits);
+
+ // From CSymmetricCipherImpl
+ TBool IsValidKeyLength(TInt aKeyBytes) const;
+ TUid ImplementationUid() const;
+ TInt GetKeyStrength() const;
+ const CExtendedCharacteristics* GetExtendedCharacteristicsL();
+
+ static CExtendedCharacteristics* CreateExtendedCharacteristicsL();
+
+ /// Destructor
+ ~CRc2Impl();
+
+ /** SSL Effective Key Length Compatibility - for compatibility with SSL */
+ static const TUint KDefaultEffectiveKeyLenBits = 1024;
+
+ private:
+ /**
+ Constructor
+ @param aOperationMode The mode of operation e.g. CBC
+ @param aCryptoMode Whether to encrypt or decrypt
+ @param aPaddingMode The padding mode to use. None, SSL, PKCS#7
+ */
+ CRc2Impl(TUid aOperationMode, TUid aCryptoMode, TUid aPaddingMode);
+
+ /// second phase of construction
+ void ConstructL(const CKey& aKey, TInt aEffectiveKeyLenBits);
+
+ /**
+ Expands the key (iKey) to iEffectiveKeyLenBits and stores the result in iK
+ */
+ void SetKeySchedule();
+
+ // From CSymmetricBlockCipherImpl
+ void TransformEncrypt(TUint8* aBuffer, TUint aNumBlocks);
+ void TransformDecrypt(TUint8* aBuffer, TUint aNumBlocks);
+
+ private:
+ static const TUint8 KRc2BlockBytes = 8;
+ static const TInt KRc2MaxKeySizeBytes = 128;
+ static const TInt KRc2ExpandedKeyLen = 64;
+ /**
+ The expanded key buffer.
+ Each iK[i] is a 16-bit word.
+ */
+ TUint16 iK[KRc2ExpandedKeyLen]; // 128 bytes
+
+ /** The effective key length in bits */
+ TInt iEffectiveKeyLenBits;
+ };
+ }
+
+#endif //__RC2_H__