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os/security/crypto/weakcryptospi/source/symmetric/rijndaelshim.cpp
author sl@SLION-WIN7.fritz.box
Fri, 15 Jun 2012 03:10:57 +0200
changeset 0 bde4ae8d615e
permissions -rw-r--r--
First public contribution. 
     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 #include "rijndaelshim.h"

    20 

    21 #include <cryptospi/cryptosymmetriccipherapi.h>

    22 #include <cryptospi/cryptospidef.h>

    23 #include <cryptospi/plugincharacteristics.h>

    24 #include <cryptospi/keys.h>

    25 #include <cryptostrength.h>

    26 

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

    28 

    29 using namespace CryptoSpi;

    30 

    31 // CAESEncryptorShim ////////////////////////////////////////////////////////

    32 CAESEncryptorShim* CAESEncryptorShim::NewL(const TDesC8& aKey)

    33 	{

    34 	CAESEncryptorShim* self = CAESEncryptorShim::NewLC(aKey);

    35 	CleanupStack::Pop(self);

    36 	return self;

    37 	}

    38 

    39 CAESEncryptorShim* CAESEncryptorShim::NewLC(const TDesC8& aKey)

    40 	{

    41 	CAESEncryptorShim* self = new (ELeave) CAESEncryptorShim();

    42 	CleanupStack::PushL(self);

    43 	self->ConstructL(aKey);

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

    45 	return self;

    46 	}

    47 

    48 CAESEncryptorShim::CAESEncryptorShim()

    49 	{

    50 	}

    51 

    52 CAESEncryptorShim::~CAESEncryptorShim()

    53 	{

    54 	delete iSymmetricCipherImpl;

    55 	delete iKey;

    56 	}	

    57 

    58 void CAESEncryptorShim::ConstructL(const TDesC8& aKey)

    59 	{

    60 	TKeyProperty keyProperty = {KAesUid, KNullUid, KSymmetricKeyUid, KNonEmbeddedKeyUid};

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

    62 	keyParam->AddL(aKey, KSymmetricKeyParameterUid);

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

    64 	CleanupStack::PopAndDestroy(keyParam);

    65 	CSymmetricCipherFactory::CreateSymmetricCipherL(

    66 												iSymmetricCipherImpl,

    67 												KAesUid,

    68 												*iKey,

    69 												KCryptoModeEncryptUid,

    70 												KOperationModeECBUid,

    71 												KPaddingModeNoneUid,

    72 												NULL);

    73 	}		

    74 

    75 TInt CAESEncryptorShim::BlockSize() const

    76 	{

    77 	return BitsToBytes(iSymmetricCipherImpl->BlockSize());

    78 	}	

    79 

    80 TInt CAESEncryptorShim::KeySize() const

    81 	{

    82 	return iSymmetricCipherImpl->KeySize();

    83 	}	

    84 

    85 void CAESEncryptorShim::Transform(TDes8& aBlock)

    86 	{

    87 	iOutputBlock.Zero();

    88 	TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);)

    89 	aBlock = iOutputBlock;

    90 	}

    91 

    92 void CAESEncryptorShim::Reset()

    93 	{

    94 	iSymmetricCipherImpl->Reset();

    95 	}	

    96 

    97 TInt CAESEncryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/)

    98 	{

    99 	TInt ret(KErrExtensionNotSupported);

   100 	

   101 	if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl)

   102 		{

   103 		a0=iSymmetricCipherImpl;

   104 		ret=KErrNone;	

   105 		}		

   106 	return ret;

   107 	}	

   108 

   109 // CAESDecryptorShim ////////////////////////////////////////////////////////		

   110 

   111 CAESDecryptorShim* CAESDecryptorShim::NewL(const TDesC8& aKey)

   112 	{

   113 	CAESDecryptorShim* self = CAESDecryptorShim::NewLC(aKey);

   114 	CleanupStack::Pop(self);

   115 	return self;

   116 	}

   117 

   118 

   119 CAESDecryptorShim* CAESDecryptorShim::NewLC(const TDesC8& aKey)

   120 	{

   121 	CAESDecryptorShim* self = new (ELeave) CAESDecryptorShim();

   122 	CleanupStack::PushL(self);

   123 	self->ConstructL(aKey);

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

   125 	return self;

   126 	}

   127 

   128 CAESDecryptorShim::CAESDecryptorShim()

   129 	{	

   130 	}

   131 

   132 CAESDecryptorShim::~CAESDecryptorShim()

   133 	{

   134 	delete iSymmetricCipherImpl;

   135 	delete iKey;			

   136 	}

   137 

   138 void CAESDecryptorShim::ConstructL(const TDesC8& aKey)

   139 	{

   140 	TKeyProperty keyProperty = {KAesUid, KNullUid, KSymmetricKeyUid, KNonEmbeddedKeyUid};

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

   142 	keyParam->AddL(aKey, KSymmetricKeyParameterUid);

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

   144 	CleanupStack::PopAndDestroy(keyParam);

   145 	CSymmetricCipherFactory::CreateSymmetricCipherL(

   146 												iSymmetricCipherImpl,

   147 												KAesUid,

   148 												*iKey,

   149 												KCryptoModeDecryptUid,

   150 												KOperationModeECBUid,

   151 												KPaddingModeNoneUid,

   152 												NULL);	

   153 	}	

   154 

   155 TInt CAESDecryptorShim::BlockSize() const

   156 	{

   157 	return BitsToBytes(iSymmetricCipherImpl->BlockSize());

   158 	}

   159 	

   160 TInt CAESDecryptorShim::KeySize() const

   161 	{

   162 	return iSymmetricCipherImpl->KeySize();

   163 	}	

   164 

   165 void CAESDecryptorShim::Transform(TDes8& aBlock)

   166 	{

   167 	iOutputBlock.Zero();	

   168 	TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);)

   169 	aBlock = iOutputBlock;	

   170 	}

   171 

   172 void CAESDecryptorShim::Reset()

   173 	{

   174 	iSymmetricCipherImpl->Reset();

   175 	}

   176 

   177 TInt CAESDecryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/)

   178 	{

   179 	TInt ret(KErrExtensionNotSupported);

   180 	

   181 	if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl)

   182 		{

   183 		a0=iSymmetricCipherImpl;

   184 		ret=KErrNone;	

   185 		}		

   186 	return ret;

   187 	}
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