/*

* Copyright (c) 2005-2009 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: 

*

*/

/**

 @file

*/

#include <e32std.h>

#include <hash.h>

#include "hashinc.h"

#define EXPANDLOOP

EXPORT_C CMessageDigest::CMessageDigest(void):CBase()

{}

EXPORT_C CMessageDigest::CMessageDigest(const CMessageDigest& /*aMD*/):CBase()

{}

EXPORT_C CMessageDigest::~CMessageDigest(void)

{}

/* Note that the shifts here are NOT guaranteed to work if s == 0, and it is

 * assumed in R() (and hence in all inline) that a is unsigned. */

// CMD_R - rotate a left by n bits; the main bottleneck of the algorithm 

// implementation

/*

C++ version compiles to:

CMD_R__FUiUi:

	add	r3, r0, #0

	lsl	r3, r3, r1

	mov	r2, #32

	sub	r2, r2, r1

	lsr	r0, r0, r2

	add	r3, r3, r0

	add	r0, r3, #0

	bx	lr

*/

//////////////////////////////////////////////////////////////////

//	Factory class to create CMessageDigest derived objects

//////////////////////////////////////////////////////////////////

EXPORT_C CMessageDigest* CMessageDigestFactory::NewDigestL(CMessageDigest::THashId aHashId)

{

	CMessageDigest* hash = NULL;

	switch (aHashId)

	{

	case (CMessageDigest::EMD2):

		{

			hash = CMD2::NewL();

			break;

		}

	case (CMessageDigest::EMD5):

		{

			hash = CMD5::NewL();

			break;

		}

	case (CMessageDigest::ESHA1):

		{

			hash = CSHA1::NewL();

			break;

		}

        case (CMessageDigest::EMD4):

		{

			hash = CMD4::NewL();

			break;

		}

	case (CMessageDigest::ESHA224):

		{

			hash = CSHA2::NewL(E224Bit);

			break;

		}

	case (CMessageDigest::ESHA256):

		{

			hash = CSHA2::NewL(E256Bit);

			break;

		}

	case (CMessageDigest::ESHA384):

		{

			hash = CSHA2::NewL(E384Bit);

			break;

		}

	case (CMessageDigest::ESHA512):

		{

			hash = CSHA2::NewL(E512Bit);

			break;

		}

	case (CMessageDigest::HMAC):

	default:	

		User::Leave(KErrNotSupported);

	}

	return (hash);

}

EXPORT_C CMessageDigest* CMessageDigestFactory::NewDigestLC(CMessageDigest::THashId aHashId)

{

	CMessageDigest* hash = CMessageDigestFactory::NewDigestL(aHashId);

	CleanupStack::PushL(hash);

	return (hash);

}

EXPORT_C CMessageDigest* CMessageDigestFactory::NewHMACL(CMessageDigest::THashId aHashId, const TDesC8& aKey)

{

	CMessageDigest* hash = CMessageDigestFactory::NewDigestLC(aHashId);

	CMessageDigest* hmac = CHMAC::NewL(aKey, hash);

	CleanupStack::Pop(hash);	//	Now owned by hmac

	return (hmac);

}

EXPORT_C CMessageDigest* CMessageDigestFactory::NewHMACLC(CMessageDigest::THashId aHashId, const TDesC8& aKey)

{

	CMessageDigest* hmac = CMessageDigestFactory::NewHMACL(aHashId, aKey);

	CleanupStack::PushL(hmac);

	return (hmac);

}