MercurialSymaptic / file revision
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | raw | help
os/security/crypto/weakcryptospi/source/symmetric/arc4shim.cpp
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib. 
     1 /*

     2 * Copyright (c) 2006-2010 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 *

    16 */

    17 

    18 

    19 

    20 #include "arc4shim.h"

    21 

    22 #include <cryptospi/cryptosymmetriccipherapi.h>

    23 #include <cryptospi/cryptospidef.h>

    24 #include <cryptospi/plugincharacteristics.h>

    25 #include <cryptostrength.h>

    26 #include "../common/inlines.h"

    27 #include <cryptospi/keys.h>

    28 

    29 using namespace CryptoSpi;

    30 

    31 CArc4Shim* CArc4Shim::NewL(const TDesC8& aKey, TUint aDiscardBytes)

    32 	{

    33 	CArc4Shim* self = NewLC(aKey, aDiscardBytes);

    34 	CleanupStack::Pop(self);

    35 	return self;

    36 	}

    37 

    38 CArc4Shim* CArc4Shim::NewLC(const TDesC8& aKey, TUint aDiscardBytes)

    39 	{

    40 	CArc4Shim* self = new (ELeave) CArc4Shim();

    41 	CleanupStack::PushL(self);

    42 	self->ConstructL(aKey, aDiscardBytes);

    43 	TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()));

    44 	return self;

    45 	}

    46 

    47 void CArc4Shim::ConstructL(const TDesC8& aKey, TUint aDiscardBytes)

    48 	{

    49 	TKeyProperty keyProperty = {KArc4Uid, KNullUid, KSymmetricKey, KNonEmbeddedKeyUid};

    50 	CCryptoParams* keyParam =CCryptoParams::NewLC();

    51 	keyParam->AddL(aKey, KSymmetricKeyParameterUid);

    52 	iKey=CKey::NewL(keyProperty, *keyParam);

    53 	CleanupStack::PopAndDestroy(keyParam);

    54 	

    55 	iAlgorithmParams = CCryptoParams::NewL();

    56 	iAlgorithmParams->AddL(aDiscardBytes, KARC4DiscardBytes);

    57 

    58 	CSymmetricCipherFactory::CreateSymmetricCipherL(

    59 												iSymmetricCipherImpl,

    60 												KArc4Uid,

    61 												*iKey,

    62 												KCryptoModeNoneUid,

    63 												KOperationModeNoneUid,

    64 												KPaddingModeNoneUid,

    65 												iAlgorithmParams);

    66 	}

    67 

    68 CArc4Shim::~CArc4Shim()

    69 	{

    70 	delete iSymmetricCipherImpl;

    71 	delete iKey;	

    72 	delete iAlgorithmParams;

    73 	}

    74 

    75 void CArc4Shim::Reset()

    76 	{

    77 	iSymmetricCipherImpl->Reset();

    78 	}

    79 

    80 TInt CArc4Shim::BlockSize() const

    81 	{

    82 	return iSymmetricCipherImpl->BlockSize() >> 3; // Convert to bits

    83 	}

    84 

    85 TInt CArc4Shim::KeySize() const

    86 	{

    87 	return iSymmetricCipherImpl->KeySize();

    88 	}

    89 

    90 void CArc4Shim::Process(const TDesC8& aInput, TDes8& aOutput)

    91 	{

    92 	TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aInput, aOutput);)

    93 	}

    94 

    95 void CArc4Shim::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput)

    96 	{

    97 	iSymmetricCipherImpl->ProcessFinalL(aInput, aOutput);

    98 	}

    99 

   100 TInt CArc4Shim::MaxOutputLength(TInt aInputLength) const

   101 	{

   102 	return iSymmetricCipherImpl->MaxOutputLength(aInputLength);

   103 	}

   104 

   105 TInt CArc4Shim::MaxFinalOutputLength(TInt aInputLength) const

   106 	{

   107 	return iSymmetricCipherImpl->MaxFinalOutputLength(aInputLength);

   108 	}

   109 

   110 CArc4Shim::CArc4Shim()

   111 	{		

   112 	}

   113
Symaptic