--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcrypto/source/symmetric/3des.cpp	Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,137 @@
+/*
+* 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 "3des.h"
+#include "../common/inlines.h"
+#include "des.inl"
+#include <cryptostrength.h>
+
+const TInt K3DESBlockBytes = 8;
+const TInt K3DESKeyBytes = 24;
+const TInt KDESKeyBytes = 8;
+
+void C3DES::Transform(TDes8& aBlock)
+	{
+	assert(aBlock.Size() == K3DESBlockBytes);
+		
+	TUint32 l, r;
+//	Split the block into 2 word-sized big endian portions
+	GetBlockBigEndian((TUint8*)&aBlock[0], l, r);
+
+	IPerm(l,r);
+
+	DoTransform(l, r, iK1);
+	DoTransform(r, l, iK2);
+	DoTransform(l, r, iK3);
+		
+	FPerm(l,r);
+
+//	Put the portions back into the block as little endian
+	PutBlockBigEndian((TUint8*)&aBlock[0], r, l);
+	}
+
+TInt C3DES::BlockSize() const
+	{
+	return K3DESBlockBytes;
+	}
+
+TInt C3DES::KeySize() const
+	{
+	return K3DESKeyBytes;
+	}
+
+C3DES::C3DES()
+	{
+	}
+
+void C3DES::ConstructL(const TDesC8& aKey)
+	{
+	assert(aKey.Size() == K3DESKeyBytes);
+
+	iKey = aKey.AllocL();
+	DoSetKey(*iKey);
+	}
+
+void C3DES::Reset()
+	{
+	DoSetKey(*iKey);
+	}
+
+/* C3DESEncryptor */
+
+EXPORT_C C3DESEncryptor* C3DESEncryptor::NewL(const TDesC8& aKey)
+	{
+	C3DESEncryptor* me = C3DESEncryptor::NewLC(aKey);
+	CleanupStack::Pop(me);
+	return (me);	
+	}
+
+EXPORT_C C3DESEncryptor* C3DESEncryptor::NewLC(const TDesC8& aKey)
+	{
+	C3DESEncryptor* me = new (ELeave) C3DESEncryptor();
+	CleanupStack::PushL(me);
+	me->ConstructL(aKey);
+	// DES only used 7 bits out of every key byte
+	TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size());
+	return (me);	
+	}
+
+void C3DESEncryptor::DoSetKey(const TDesC8& aKey)
+	{
+	// Encryptor key	
+	SetKey(aKey.Mid(0, KDESKeyBytes), iK1);
+	// Decryptor key
+	SetKey(aKey.Mid(KDESKeyBytes, 2*KDESKeyBytes), iK2);
+	ReverseKeySchedule(iK2); // Reverse key schedule order
+	// Encryptor key
+	SetKey(aKey.Mid(2*KDESKeyBytes), iK3);
+	}
+ 
+/* C3DESDecryptor */
+
+EXPORT_C C3DESDecryptor* C3DESDecryptor::NewL(const TDesC8& aKey)
+	{
+	C3DESDecryptor* me = C3DESDecryptor::NewLC(aKey);
+	CleanupStack::Pop(me);
+	return (me);
+	}
+
+EXPORT_C C3DESDecryptor* C3DESDecryptor::NewLC(const TDesC8& aKey)
+	{
+	C3DESDecryptor* me = new (ELeave) C3DESDecryptor();
+	CleanupStack::PushL(me);
+	me->ConstructL(aKey);
+	// DES only used 7 bits out of every key byte
+	TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size());
+	return (me);
+	}
+
+void C3DESDecryptor::DoSetKey(const TDesC8& aKey)
+	{
+	// 3DES decryption, reverse through key
+	// Decryptor key
+	CDES::SetKey(aKey.Mid(2*KDESKeyBytes), iK1);
+	ReverseKeySchedule(iK1);	//	Reverse key schedule order	
+
+	// Encryptor key
+	CDES::SetKey(aKey.Mid(KDESKeyBytes, 2*KDESKeyBytes), iK2);
+	
+	// Decryptor key
+	CDES::SetKey(aKey.Mid(0, KDESKeyBytes), iK3);
+	ReverseKeySchedule(iK3);	//	Reverse key schedule order
+	}