sl@0: /*
sl@0: * Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #include <des.h>
sl@0: #include "desshim.h"
sl@0: 
sl@0: const TInt KDESBlockBytes = 8;
sl@0: const TInt KDESKeyBytes = 8;
sl@0: 
sl@0: CDES::~CDES()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: CDES::CDES()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: typedef TUint8 TKeyDES[KDESKeyBytes];
sl@0: const TInt KKnownWeakKeysCount = 16;
sl@0: 
sl@0: const TKeyDES weak_keys[KKnownWeakKeysCount] =
sl@0: 	{
sl@0: 	/* weak keys */
sl@0: 	{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
sl@0: 	{0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE},
sl@0: 	{0x1E,0x1E,0x1E,0x1E,0x0E,0x0E,0x0E,0x0E},
sl@0: 	{0xE0,0xE0,0xE0,0xE0,0xF0,0xF0,0xF0,0xF0},
sl@0: 	{0x00,0xFE,0x00,0xFE,0x00,0xFE,0x00,0xFE},
sl@0: 	{0xFE,0x00,0xFE,0x00,0xFE,0x00,0xFE,0x00},
sl@0: 	{0x1E,0xE0,0x1E,0xE0,0x0E,0xF0,0x0E,0xF0},
sl@0: 	{0xE0,0x1E,0xE0,0x1E,0xF0,0x0E,0xF0,0x0E},
sl@0: 	{0x00,0xE0,0x00,0xE0,0x00,0xF0,0x00,0xF0},
sl@0: 	{0xE0,0x00,0xE0,0x00,0xF0,0x00,0xF0,0x00},
sl@0: 	{0x1E,0xFE,0x1E,0xFE,0x0E,0xFE,0x0E,0xFE},
sl@0: 	{0xFE,0x1E,0xFE,0x1E,0xFE,0x0E,0xFE,0x0E},
sl@0: 	{0x00,0x1E,0x00,0x1E,0x00,0x0E,0x00,0x0E},
sl@0: 	{0x1E,0x00,0x1E,0x00,0x0E,0x00,0x0E,0x00},
sl@0: 	{0xE0,0xFE,0xE0,0xFE,0xF0,0xFE,0xF0,0xFE},
sl@0: 	{0xFE,0xE0,0xFE,0xE0,0xFE,0xF0,0xFE,0xF0}
sl@0: 	};
sl@0: 	
sl@0: EXPORT_C TBool CDES::IsWeakKey(const TDesC8& aKey)
sl@0: 	{
sl@0: 	TKeyDES key;
sl@0: 	TInt index = 0;
sl@0: 	//Reset parity bits
sl@0: 	for(; index < KDESKeyBytes; index++)
sl@0: 		{
sl@0: 		key[index] = aKey[index] & 0xFE;
sl@0: 		}
sl@0: 		
sl@0: 	TBool weak = EFalse;	
sl@0: 	//Compare key with potential weak keys without parity	
sl@0: 	for (index=0; index < KKnownWeakKeysCount; index++)
sl@0: 		{
sl@0: 		if (Mem::Compare(weak_keys[index], KDESKeyBytes, &key[0], KDESKeyBytes)==0)
sl@0: 			{
sl@0: 			weak = ETrue;
sl@0: 			break;
sl@0: 			}
sl@0: 		}
sl@0: 	return weak;
sl@0: 	}
sl@0: 
sl@0: /* CDESEncryptor */
sl@0: EXPORT_C CDESEncryptor* CDESEncryptor::NewL(const TDesC8& aKey, TBool /*aCheckWeakKey*/)
sl@0: 	{
sl@0: 	return CDESEncryptorShim::NewL(aKey);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C CDESEncryptor* CDESEncryptor::NewLC(const TDesC8& aKey, TBool /*aCheckWeakKey*/)
sl@0: 	{
sl@0: 	return CDESEncryptorShim::NewLC(aKey);
sl@0: 	}
sl@0: 
sl@0: CDESEncryptor::CDESEncryptor()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: /* CDESDecryptor */
sl@0: EXPORT_C CDESDecryptor* CDESDecryptor::NewL(const TDesC8& aKey, TBool /*aCheckWeakKey*/)
sl@0: 	{
sl@0: 	return CDESDecryptorShim::NewL(aKey);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C CDESDecryptor* CDESDecryptor::NewLC(const TDesC8& aKey, TBool /*aCheckWeakKey*/)
sl@0: 	{
sl@0: 	return CDESDecryptorShim::NewLC(aKey);
sl@0: 	}
sl@0: 
sl@0: CDESDecryptor::CDESDecryptor()
sl@0: 	{	
sl@0: 	}
sl@0: 	
sl@0: // All these methods have been replaced by the shim
sl@0: #ifdef _BullseyeCoverage
sl@0: #pragma suppress_warnings on
sl@0: #pragma BullseyeCoverage off
sl@0: #pragma suppress_warnings off
sl@0: #endif
sl@0: 
sl@0: void CDES::Transform(TDes8& /*aBlock*/)
sl@0: 	{
sl@0: 	// Method replaced by shim 
sl@0: 	ASSERT(EFalse);	
sl@0: 	}
sl@0: 
sl@0: TInt CDES::BlockSize() const
sl@0: 	{
sl@0: 	// Method replaced by shim 
sl@0: 	ASSERT(EFalse);			
sl@0: 	return KDESBlockBytes;
sl@0: 	}
sl@0: 
sl@0: TInt CDES::KeySize() const
sl@0: 	{
sl@0: 	// Method replaced by shim 
sl@0: 	ASSERT(EFalse);			
sl@0: 	return KDESKeyBytes;
sl@0: 	}
sl@0: 	
sl@0: void CDES::Reset()
sl@0: 	{
sl@0: 	// Method replaced by shim 
sl@0: 	ASSERT(EFalse);			
sl@0: 	}	
sl@0: 	
sl@0: void CDES::SetKey(const TDesC8& /*aKey*/, TUint32* /*aKeyBuffer*/)
sl@0: 	{
sl@0: 	// Method replaced by shim 
sl@0: 	ASSERT(EFalse);				
sl@0: 	}
sl@0: 	
sl@0: void CDES::ConstructL(const TDesC8& /*aKey*/, TBool /*aCheckWeakKey*/)
sl@0: 	{
sl@0: 	// Method replaced by shim 
sl@0: 	ASSERT(EFalse);			
sl@0: 	}
sl@0: 
sl@0: void CDESDecryptor::SetKey(const TDesC8& /*aKey*/, TUint32* /*aKeyBuffer*/)
sl@0: 	{
sl@0: 	// Method replaced by shim 
sl@0: 	ASSERT(EFalse);	
sl@0: 	}