| author | andy simpson <andrews@symbian.org> |
| Mon, 25 Oct 2010 16:13:35 +0100 | |
| branch | RCL_3 |
| changeset 107 | c3d26e45acc2 |
| parent 49 | 2f10d260163b |
| permissions | -rw-r--r-- |
| 17 | 1 |
/* |
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2f10d260163b
Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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changeset
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* Copyright (c) 2006-2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#include "desshim.h" |
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2f10d260163b
Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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diff
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#include <cryptospi/cryptosymmetriccipherapi.h> |
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#include <cryptospi/cryptospidef.h> |
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#include <cryptospi/plugincharacteristics.h> |
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Revision: 201010
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
17
diff
changeset
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#include <cryptospi/keys.h> |
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#include <cryptostrength.h> |
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#include "../common/inlines.h" |
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using namespace CryptoSpi; |
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// CDESEncryptorShim //////////////////////////////////////////////////////// |
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CDESEncryptorShim* CDESEncryptorShim::NewL(const TDesC8& aKey) |
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{
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CDESEncryptorShim* self = CDESEncryptorShim::NewLC(aKey); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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CDESEncryptorShim* CDESEncryptorShim::NewLC(const TDesC8& aKey) |
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{
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CDESEncryptorShim* self = new (ELeave) CDESEncryptorShim(); |
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CleanupStack::PushL(self); |
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self->ConstructL(aKey); |
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// DES only used 7 bits out of every key byte |
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TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size()); |
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return self; |
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} |
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CDESEncryptorShim::CDESEncryptorShim() |
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{
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} |
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CDESEncryptorShim::~CDESEncryptorShim() |
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{
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delete iSymmetricCipherImpl; |
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delete iKey; |
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} |
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void CDESEncryptorShim::ConstructL(const TDesC8& aKey) |
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{
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TKeyProperty keyProperty = {KDesUid, KNullUid, KSymmetricKey, KNonEmbeddedKeyUid};
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CCryptoParams* keyParam =CCryptoParams::NewLC(); |
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keyParam->AddL(aKey, KSymmetricKeyParameterUid); |
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iKey=CKey::NewL(keyProperty, *keyParam); |
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CleanupStack::PopAndDestroy(keyParam); |
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CSymmetricCipherFactory::CreateSymmetricCipherL( |
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iSymmetricCipherImpl, |
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KDesUid, |
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*iKey, |
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KCryptoModeEncryptUid, |
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KOperationModeECBUid, |
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KPaddingModeNoneUid, |
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NULL); |
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} |
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TInt CDESEncryptorShim::BlockSize() const |
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{
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// SPI returns block size in BITS |
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return BitsToBytes(iSymmetricCipherImpl->BlockSize()); |
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} |
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TInt CDESEncryptorShim::KeySize() const |
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{
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return iSymmetricCipherImpl->KeySize(); |
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} |
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void CDESEncryptorShim::Transform(TDes8& aBlock) |
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{
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iOutputBlock.Zero(); |
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TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);) |
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aBlock = iOutputBlock; |
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} |
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void CDESEncryptorShim::Reset() |
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{
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iSymmetricCipherImpl->Reset(); |
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} |
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TInt CDESEncryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/) |
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{
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TInt ret(KErrNotSupported); |
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if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl) |
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{
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a0=iSymmetricCipherImpl; |
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ret=KErrNone; |
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} |
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return ret; |
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} |
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// CDESDecryptorShim //////////////////////////////////////////////////////// |
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CDESDecryptorShim* CDESDecryptorShim::NewL(const TDesC8& aKey) |
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{
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CDESDecryptorShim* self = CDESDecryptorShim::NewLC(aKey); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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CDESDecryptorShim* CDESDecryptorShim::NewLC(const TDesC8& aKey) |
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{
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CDESDecryptorShim* self = new (ELeave) CDESDecryptorShim(); |
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CleanupStack::PushL(self); |
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self->ConstructL(aKey); |
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// DES only used 7 bits out of every key byte |
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TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size()); |
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return self; |
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} |
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CDESDecryptorShim::CDESDecryptorShim() |
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{
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} |
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CDESDecryptorShim::~CDESDecryptorShim() |
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{
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delete iSymmetricCipherImpl; |
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delete iKey; |
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} |
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void CDESDecryptorShim::ConstructL(const TDesC8& aKey) |
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{
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TKeyProperty keyProperty = {KDesUid, KNullUid, KSymmetricKey, KNonEmbeddedKeyUid};
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CCryptoParams* keyParam =CCryptoParams::NewLC(); |
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keyParam->AddL(aKey, KSymmetricKeyParameterUid); |
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iKey=CKey::NewL(keyProperty, *keyParam); |
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CleanupStack::PopAndDestroy(keyParam); |
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CSymmetricCipherFactory::CreateSymmetricCipherL( |
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iSymmetricCipherImpl, |
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KDesUid, |
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*iKey, |
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KCryptoModeDecryptUid, |
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KOperationModeECBUid, |
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KPaddingModeNoneUid, |
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NULL); |
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} |
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TInt CDESDecryptorShim::BlockSize() const |
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{
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// SPI returns block size in BITS |
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return BitsToBytes(iSymmetricCipherImpl->BlockSize()); |
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} |
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TInt CDESDecryptorShim::KeySize() const |
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{
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return iSymmetricCipherImpl->KeySize(); |
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} |
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void CDESDecryptorShim::Transform(TDes8& aBlock) |
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{
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iOutputBlock.Zero(); |
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TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);) |
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aBlock = iOutputBlock; |
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} |
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void CDESDecryptorShim::Reset() |
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{
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iSymmetricCipherImpl->Reset(); |
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} |
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TInt CDESDecryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/) |
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{
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TInt ret(KErrNotSupported); |
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if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl) |
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{
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a0=iSymmetricCipherImpl; |
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ret=KErrNone; |
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} |
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return ret; |
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} |