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 "rijndael.h"
sl@0: #include "rijndaelshim.h"
sl@0: #include "rijndaeltables.h"
sl@0: #include "../common/inlines.h"
sl@0: #include <cryptostrength.h>
sl@0: 
sl@0: const TUint KAESKeyBytes128 = 16;
sl@0: const TUint KAESKeyBytes192 = 24;
sl@0: const TUint KAESKeyBytes256 = 32;
sl@0: const TUint KAESBlockBytes = 16;
sl@0: 
sl@0: /* CRijndael */
sl@0: EXPORT_C CRijndael::CRijndael(void)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: void CRijndael::Reset()
sl@0: 	{
sl@0: 	// CRijndael is externally derivable. Don't delete this code
sl@0: 	SetKey(*iKey);
sl@0: 	}
sl@0: 
sl@0: TInt CRijndael::KeySize() const
sl@0: 	{
sl@0: 	// CRijndael is externally derivable. Don't delete this code
sl@0: 	return (4*(iRounds+1));
sl@0: 	}
sl@0: 
sl@0: EXPORT_C CRijndael::~CRijndael()
sl@0: 	{
sl@0: 	// CRijndael is externally derivable. Don't delete this code
sl@0: 	delete iKey;
sl@0: 	}
sl@0: 
sl@0: void CRijndael::ConstructL(const TDesC8& aKey)
sl@0: 	{
sl@0: 	// CRijndael is externally derivable. Don't delete this code
sl@0: 	TUint keySize = aKey.Size();
sl@0: 	assert((keySize==KAESKeyBytes128)||(keySize==KAESKeyBytes192)||(keySize==KAESKeyBytes256));
sl@0: 	iKey = aKey.AllocL();
sl@0: 	iRounds = keySize/4 + 6;
sl@0: 	SetKey(aKey);
sl@0: 	}
sl@0: 
sl@0: void CRijndael::SetKey(const TDesC8& aKey)
sl@0: 	{
sl@0: 	// CRijndael is externally derivable. Don't delete this code
sl@0: 	TUint keySize = aKey.Size();
sl@0: 	TUint32 temp; 
sl@0: 	TUint32* rk = &iK[0];
sl@0: 
sl@0: 	TUint i = 0;
sl@0: 
sl@0: 	GetUserKeyBigEndian(rk, keySize/4, &aKey[0], keySize);
sl@0: 
sl@0: 	switch(keySize)
sl@0: 		{
sl@0: 		case (KAESKeyBytes128):
sl@0: 			{
sl@0: 			FOREVER
sl@0: 				{
sl@0: 				temp  = rk[3];
sl@0: 				rk[4] = rk[0] ^
sl@0: 					(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0xff000000) ^
sl@0: 					(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x00ff0000) ^
sl@0: 					(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x0000ff00) ^
sl@0: 					(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0x000000ff) ^
sl@0: 					RIJNDAEL_TABLE::rcon[i];
sl@0: 				rk[5] = rk[1] ^ rk[4];
sl@0: 				rk[6] = rk[2] ^ rk[5];
sl@0: 				rk[7] = rk[3] ^ rk[6];
sl@0: 				if (++i == 10)
sl@0: 					break;
sl@0: 				rk += 4;
sl@0: 				}
sl@0: 			}
sl@0: 		break;
sl@0: 
sl@0: 		case (KAESKeyBytes192):
sl@0: 			{
sl@0: 			FOREVER
sl@0: 				{
sl@0: 				temp = rk[ 5];
sl@0: 				rk[ 6] = rk[ 0] ^
sl@0: 					(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0xff000000) ^
sl@0: 					(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x00ff0000) ^
sl@0: 					(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x0000ff00) ^
sl@0: 					(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0x000000ff) ^
sl@0: 					RIJNDAEL_TABLE::rcon[i];
sl@0: 				rk[ 7] = rk[ 1] ^ rk[ 6];
sl@0: 				rk[ 8] = rk[ 2] ^ rk[ 7];
sl@0: 				rk[ 9] = rk[ 3] ^ rk[ 8];
sl@0: 				if (++i == 8)
sl@0: 					break;
sl@0: 				rk[10] = rk[ 4] ^ rk[ 9];
sl@0: 				rk[11] = rk[ 5] ^ rk[10];
sl@0: 				rk += 6;
sl@0: 				}
sl@0: 			}
sl@0: 		break;
sl@0: 
sl@0: 		case (KAESKeyBytes256):
sl@0: 			{
sl@0: 			FOREVER
sl@0: 				{
sl@0:         		temp = rk[ 7];
sl@0:         		rk[ 8] = rk[ 0] ^
sl@0:         			(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0xff000000) ^
sl@0:         			(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x00ff0000) ^
sl@0:         			(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x0000ff00) ^
sl@0:         			(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0x000000ff) ^
sl@0:         			RIJNDAEL_TABLE::rcon[i];
sl@0:         		rk[ 9] = rk[ 1] ^ rk[ 8];
sl@0:         		rk[10] = rk[ 2] ^ rk[ 9];
sl@0:         		rk[11] = rk[ 3] ^ rk[10];
sl@0: 				if (++i == 7)
sl@0: 					break;
sl@0:         		temp = rk[11];
sl@0:         		rk[12] = rk[ 4] ^
sl@0:         			(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0xff000000) ^
sl@0:         			(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0x00ff0000) ^
sl@0:         			(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x0000ff00) ^
sl@0:         			(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x000000ff);
sl@0:         		rk[13] = rk[ 5] ^ rk[12];
sl@0:         		rk[14] = rk[ 6] ^ rk[13];
sl@0:         		rk[15] = rk[ 7] ^ rk[14];
sl@0: 
sl@0: 				rk += 8;
sl@0: 				}
sl@0: 			}
sl@0: 		break;
sl@0: 
sl@0: 		default:
sl@0: 			assert(0);	//	Shouldn't get here, keeps compiler happy
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /* CAESEncryptor */
sl@0: EXPORT_C CAESEncryptor* CAESEncryptor::NewL(const TDesC8& aKey)
sl@0: 	{
sl@0: 	return CAESEncryptorShim::NewL(aKey);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C CAESEncryptor* CAESEncryptor::NewLC(const TDesC8& aKey)
sl@0: 	{
sl@0: 	return CAESEncryptorShim::NewLC(aKey);
sl@0: 	}
sl@0: 
sl@0: CAESEncryptor::CAESEncryptor()
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: /* CAESDecryptor */
sl@0: EXPORT_C CAESDecryptor* CAESDecryptor::NewL(const TDesC8& aKey)
sl@0: 	{
sl@0: 	return CAESDecryptorShim::NewL(aKey);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C CAESDecryptor* CAESDecryptor::NewLC(const TDesC8& aKey)
sl@0: 	{
sl@0: 	return CAESDecryptorShim::NewLC(aKey);
sl@0: 	}
sl@0: 
sl@0: CAESDecryptor::CAESDecryptor()
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: TInt CAESDecryptor::BlockSize() const
sl@0: 	{
sl@0: 	// Method replaced by shim
sl@0: 	ASSERT(EFalse);
sl@0: 	return 0;
sl@0: 	}
sl@0: 
sl@0: void CAESDecryptor::Transform(TDes8& /*aBlock*/)
sl@0: 	{
sl@0: 	// Method replaced by shim
sl@0: 	ASSERT(EFalse);	
sl@0: 	}
sl@0: 
sl@0: void CAESDecryptor::SetKey(const TDesC8& /*aKey*/)
sl@0: 	{
sl@0: 	// Method replaced by shim
sl@0: 	ASSERT(EFalse);
sl@0: 	}
sl@0: 
sl@0: TInt CAESEncryptor::BlockSize() const
sl@0: 	{
sl@0: 	// Method replaced by shim
sl@0: 	ASSERT(EFalse);
sl@0: 	return KAESBlockBytes;
sl@0: 	}
sl@0: 
sl@0: void CAESEncryptor::Transform(TDes8& /*aBlock*/)
sl@0: 	{
sl@0: 	// Method replaced by shim
sl@0: 	ASSERT(EFalse);		
sl@0: 	}
sl@0: