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