1 /*

     2 * Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * streamcipher.cpp

    16 *

    17 */

    18 

    19 

    20 #include "streamcipher.h"

    21 #include <cryptopanic.h>

    22 

    23 EXPORT_C void CStreamCipher::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)

    24 	{

    25 	Process(aInput, aOutput);

    26 	}

    27 

    28 EXPORT_C void CStreamCipher::Process(const TDesC8& aInput, TDes8& aOutput)

    29 	{

    30 	TInt outputIndex = aOutput.Size();

    31 

    32 	// aOutput may already have outputIndex bytes of data in it

    33 	// check there will still be enough space to process the result

    34 	__ASSERT_DEBUG(aOutput.MaxLength() - outputIndex >= MaxOutputLength(aInput.Length()), User::Panic(KCryptoPanic, ECryptoPanicOutputDescriptorOverflow));

    35 

    36 	aOutput.Append(aInput);

    37 

    38 	TPtr8 transformBuf((TUint8*)(aOutput.Ptr()) + outputIndex, aInput.Size(),

    39 		aInput.Size());

    40 	DoProcess(transformBuf);

    41 	}

    42 

    43 EXPORT_C TInt CStreamCipher::BlockSize() const

    44 	{

    45 	return (1);

    46 	}

    47 

    48 EXPORT_C TInt CStreamCipher::MaxOutputLength(TInt aInputLength) const

    49 	{

    50 	return aInputLength;

    51 	}

    52 

    53 EXPORT_C TInt CStreamCipher::MaxFinalOutputLength(TInt aInputLength) const

    54 	{

    55 	return aInputLength;

    56 	}