1 /*

     2 * Copyright (c) 2008-2009 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 * software Mac implementation

    16 * Software Mac Implementation

    17 *

    18 */

    19 

    20 

    21 /**

    22  @file

    23 */

    24 

    25 

    26 // MAC plugin header

    27 #include "macimpl.h"

    28 #include "pluginconfig.h"

    29 

    30 // headers from cryptospi framework

    31 #include <cryptospi/cryptospidef.h>

    32 

    33 // HMAC plugin headers

    34 #include "md2impl.h"

    35 #include "hmacimpl.h"

    36 

    37 

    38 using namespace SoftwareCrypto;

    39 

    40 

    41 CMacImpl* CMacImpl::NewL(const CKey& aKey, const TUid aImplementationId, const CCryptoParams* aAlgorithmParams)

    42 	{

    43 	CMacImpl* self = new (ELeave) CMacImpl();

    44 	CleanupStack::PushL(self);

    45 	self->ConstructL(aKey, aImplementationId, aAlgorithmParams);

    46 	CleanupStack::Pop();

    47 	return self;

    48 	}

    49 

    50 CMacImpl::CMacImpl() 

    51 	{

    52 	}

    53 

    54 void CMacImpl::ConstructL(const CKey& aKey, const TUid aImplementationId, const CCryptoParams* /*aAlgorithmParams*/) 

    55 	{

    56 	iImplementationUid = aImplementationId; 

    57 	iKey = CryptoSpi::CKey::NewL(aKey);

    58 		

    59 	MSoftwareHash* hashImpl = NULL;

    60 	

    61 	switch (aImplementationId.iUid)

    62 		{

    63 		case KTestPlugin01MacMd2_1:

    64 		case KTestPlugin01MacMd2_2:

    65 			{

    66 			hashImpl = CMD2Impl::NewL(KTestPlugin01Md2_1Uid);

    67 			CleanupClosePushL(*hashImpl);

    68 			iHmacImpl=CHMacImpl::NewL(*iKey, hashImpl);

    69 			iBase = EHashBased;

    70 			}

    71 			break;

    72 		case KTestPlugin01XcbcMac96:

    73 			{

    74 			CSymmetricCipher* symmetricCipher = NULL;

    75 			CryptoSpi::CSymmetricCipherFactory::CreateSymmetricCipherL(symmetricCipher,

    76 														CryptoSpi::KAesUid, *iKey,

    77 														CryptoSpi::KCryptoModeEncryptUid,

    78 														CryptoSpi::KOperationModeCBCUid,

    79 														CryptoSpi::KPaddingModeNoneUid,

    80 														NULL);

    81 			

    82 			iCmacImpl= CCMacImpl::NewL(*iKey, symmetricCipher, CryptoSpi::KAlgorithmCipherAesXcbcMac96);

    83 			iBase = ECipherBased;

    84 			}

    85 			break;

    86 		default:

    87 			{

    88 			User::Leave(KErrNotSupported);

    89 			}

    90 		}

    91 

    92 	if(iBase == EHashBased)

    93 		{

    94 		CleanupStack::PopAndDestroy(hashImpl);

    95 		}

    96 	}

    97 

    98 CMacImpl::~CMacImpl()

    99 	{

   100 	delete iKey;

   101 	if(iHmacImpl)

   102 		{

   103 		iHmacImpl->Close();

   104 		}

   105 	delete iCmacImpl;

   106 	}

   107 	

   108 void CMacImpl::Reset()

   109 	{

   110 	if (iBase == EHashBased)

   111 		{

   112 		iHmacImpl->Reset();

   113 		}

   114 	else if (iBase == ECipherBased)

   115 		{

   116 		iCmacImpl->Reset();

   117 		}

   118 	}

   119 	

   120 void CMacImpl::Close()

   121 	{

   122 	delete this;	

   123 	}

   124 	

   125 void CMacImpl::GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics)

   126 	{

   127 	aPluginCharacteristics=NULL;

   128 	TInt macNum=sizeof(KMacCharacteristics)/sizeof(TMacCharacteristics*);

   129 	for (TInt i=0;i<macNum;++i)

   130 		{

   131 		if (KMacCharacteristics[i]->iMacChar.iImplementationUID==ImplementationUid().iUid)

   132 			{

   133 			aPluginCharacteristics = KMacCharacteristics[i];

   134 			break;

   135 			}

   136 		}	

   137 	}

   138 

   139 const CExtendedCharacteristics* CMacImpl::GetExtendedCharacteristicsL()

   140 	{

   141 	return (iBase == EHashBased) ? iHmacImpl->GetExtendedCharacteristicsL(): iCmacImpl->GetExtendedCharacteristicsL();

   142 	}

   143 

   144 TAny* CMacImpl::GetExtension(TUid aExtensionId)

   145 	{

   146 	return (iBase == EHashBased) ? iHmacImpl->GetExtension(aExtensionId): NULL;

   147 	}

   148 

   149 TUid CMacImpl::ImplementationUid() const

   150 	{

   151 	return iImplementationUid;

   152 	}

   153 

   154 TPtrC8 CMacImpl::MacL(const TDesC8& aMessage)

   155 	{

   156 	return (iBase == EHashBased) ? iHmacImpl->Hash(aMessage):iCmacImpl->MacL(aMessage);

   157 	}		

   158 	

   159 void CMacImpl::UpdateL(const TDesC8& aMessage)

   160 	{

   161 	(iBase == EHashBased) ? iHmacImpl->Update(aMessage):iCmacImpl->UpdateL(aMessage);

   162 	}

   163 

   164 TPtrC8 CMacImpl::FinalL(const TDesC8& aMessage)

   165 	{

   166 	return (iBase == EHashBased) ? iHmacImpl->Final(aMessage):iCmacImpl->FinalL(aMessage);

   167 	}

   168 

   169 void CMacImpl::ReInitialiseAndSetKeyL(const CKey& aKey)

   170 	{

   171 	delete iKey;

   172 	iKey = NULL;

   173 	iKey = CryptoSpi::CKey::NewL(aKey);

   174 	

   175 	if (iBase == EHashBased)

   176 		{

   177 		iHmacImpl->SetKeyL(aKey);

   178 		iHmacImpl->Reset();

   179 		}

   180 	else if (iBase == ECipherBased)

   181 		{

   182 		iCmacImpl->ReInitialiseAndSetKeyL(aKey);

   183 		}

   184 	}

   185 

   186 MMac* CMacImpl::ReplicateL()

   187 	{

   188 	CMacImpl* that= new(ELeave) CMacImpl();

   189 	CleanupStack::PushL(that);

   190 	that->iImplementationUid = iImplementationUid;

   191 	that->iBase = iBase;

   192 	that->iKey=CKey::NewL(*iKey);

   193 	

   194 	if(iBase == EHashBased)

   195 		{

   196 		that->iHmacImpl=static_cast<CHMacImpl*>(iHmacImpl->ReplicateL());

   197 		}

   198 	else if (iBase == ECipherBased)

   199 		{

   200 		that->iCmacImpl= iCmacImpl->ReplicateL();

   201 		}

   202 	CleanupStack::Pop(that);

   203 	return that;

   204 	}

   205 	

   206 MMac* CMacImpl::CopyL()

   207 	{

   208 	CMacImpl* that= new(ELeave) CMacImpl();

   209 	CleanupStack::PushL(that);

   210 	that->iImplementationUid = iImplementationUid;

   211 	that->iBase = iBase;

   212 	that->iKey=CKey::NewL(*iKey);

   213 

   214 	if(iBase == EHashBased)

   215 		{

   216 		that->iHmacImpl=static_cast<CHMacImpl*>(iHmacImpl->CopyL());

   217 		}

   218 	else if (iBase == ECipherBased)

   219 		{

   220 		that->iCmacImpl= iCmacImpl->CopyL();

   221 		}

   222 	CleanupStack::Pop(that);

   223 	return that;

   224 	}