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/*
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* Copyright (c) 2002-2009 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 <symmetric.h>
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#include "pbesymmetricfactory.h"
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#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS
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/** OpenSSL PKCS8 Effective Key Length Compatibility.*/
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const TUint KPkcs8CompatibilityBits = 128;
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/** PKCS12 PBE Effective Key Length Compatibility.*/
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const TUint KPkcs12CompatibilityBits = 40;
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#endif
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TUint PBE::GetBlockBytes(TPBECipher aCipher)
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{
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switch(aCipher)
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{
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case ECipherAES_CBC_128:
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case ECipherAES_CBC_192:
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case ECipherAES_CBC_256:
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return KAESBlockBytes;
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case ECipherDES_CBC:
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case ECipher3DES_CBC:
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case ECipher2Key3DES_CBC:
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return KDESBlockBytes;
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case ECipherRC2_CBC_128_16:
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case ECipherRC2_CBC_40_16:
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case ECipherRC2_CBC_128:
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case ECipherRC2_CBC_40:
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case ECipherRC2_CBC_40_5:
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return KRC2BlockBytes;
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case ECipherARC4_128:
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case ECipherARC4_40:
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return 1; // 1 byte block for stream cipher
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default:
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User::Panic(_L("Invalid PBE cipher"), 1);
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}
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return (KErrNone); // For the compiler
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}
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TUint PBE::GetKeyBytes(TPBECipher aCipher)
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{
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switch(aCipher)
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{
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case ECipherAES_CBC_128:
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return KAESKeyBytes128;
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case ECipherAES_CBC_192:
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return KAESKeyBytes192;
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case ECipherAES_CBC_256:
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return KAESKeyBytes256;
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case ECipherDES_CBC:
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return KDESKeyBytes;
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case ECipher3DES_CBC:
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return K3DESKeyBytes;
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case ECipher2Key3DES_CBC:
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return K2Key3DESKeyBytes;
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case ECipherRC2_CBC_128:
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case ECipherRC2_CBC_128_16:
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return KRC2KeyBytes128;
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case ECipherRC2_CBC_40:
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case ECipherRC2_CBC_40_16:
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case ECipherRC2_CBC_40_5:
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return KRC2KeyBytes40;
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case ECipherARC4_128:
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return KRC4KeyBytes128;
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case ECipherARC4_40:
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return KRC4KeyBytes40;
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default:
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User::Panic(_L("Invalid PBE cipher"), 1);
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}
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return (KErrNone); // For the compiler
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}
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CSymmetricCipher* PBE::MakeEncryptorL(TPBECipher aCipher, const TDesC8& aKey,
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const TDesC8& aIV)
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{
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CSymmetricCipher* cipher = 0;
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CBlockTransformation* block = 0;
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switch(aCipher)
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{
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// stream cipher
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case ECipherARC4_40:
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case ECipherARC4_128:
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cipher = CARC4::NewL(aKey, 0);
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break;
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// block cipher
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case ECipherAES_CBC_128:
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case ECipherAES_CBC_192:
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case ECipherAES_CBC_256:
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block = CAESEncryptor::NewLC(aKey);
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break;
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case ECipherDES_CBC:
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block = CDESEncryptor::NewLC(aKey);
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break;
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case ECipher3DES_CBC:
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block = C3DESEncryptor::NewLC(aKey);
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break;
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case ECipher2Key3DES_CBC:
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{
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// Construct 3key from 2 key ( copy first key to 3rd key ) each key 8 bytes
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TBuf8<K3DESKeyBytes> encryptKey(aKey);
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encryptKey.Append(aKey.Ptr(),KDESKeyBytes);
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block = C3DESEncryptor::NewLC(encryptKey);
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break;
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}
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case ECipherRC2_CBC_40:
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case ECipherRC2_CBC_128:
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block = CRC2Encryptor::NewLC(aKey);
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break;
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case ECipherRC2_CBC_40_16:
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case ECipherRC2_CBC_128_16:
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block = CRC2Encryptor::NewLC(aKey, KPkcs8CompatibilityBits);
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break;
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case ECipherRC2_CBC_40_5:
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block = CRC2Encryptor::NewLC(aKey, KPkcs12CompatibilityBits);
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break;
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default:
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User::Panic(_L("Invalid PBE encryptor"), 1);
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}
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// if aCipher is not stream cipher, create block cipher object
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if(aCipher != ECipherARC4_40 && aCipher != ECipherARC4_128)
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{
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block = CModeCBCEncryptor::NewL(block, aIV);
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CleanupStack::Pop(); //1st block owned by 2nd
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CleanupStack::PushL(block);//2nd block
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CPadding* padding = CPaddingSSLv3::NewLC(GetBlockBytes(aCipher));
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cipher = CBufferedEncryptor::NewL(block, padding);
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CleanupStack::Pop(padding); //owned by cipher
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CleanupStack::Pop(block); //owned by cipher
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}
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return cipher;
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}
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CSymmetricCipher* PBE::MakeDecryptorL(TPBECipher aCipher, const TDesC8& aKey,
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const TDesC8& aIV)
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{
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CSymmetricCipher* cipher = 0;
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CBlockTransformation* block = 0;
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switch(aCipher)
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{
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// stream cipher
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case ECipherARC4_40:
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case ECipherARC4_128:
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cipher = CARC4::NewL(aKey, 0);
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break;
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// block cipher
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case ECipherAES_CBC_128:
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case ECipherAES_CBC_192:
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case ECipherAES_CBC_256:
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block = CAESDecryptor::NewLC(aKey);
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break;
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case ECipherDES_CBC:
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block = CDESDecryptor::NewLC(aKey);
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break;
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case ECipher3DES_CBC:
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block = C3DESDecryptor::NewLC(aKey);
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break;
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case ECipher2Key3DES_CBC:
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{
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// Construct 3key from 2 key ( copy first key to 3rd key ) each key 8 bytes
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TBuf8<K3DESKeyBytes> encryptKey(aKey);
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encryptKey.Append(aKey.Ptr(),KDESKeyBytes);
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block = C3DESDecryptor::NewLC(encryptKey);
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break;
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}
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case ECipherRC2_CBC_40:
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case ECipherRC2_CBC_128:
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block = CRC2Decryptor::NewLC(aKey);
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break;
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case ECipherRC2_CBC_40_16:
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case ECipherRC2_CBC_128_16:
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block = CRC2Decryptor::NewLC(aKey, KPkcs8CompatibilityBits);
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break;
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case ECipherRC2_CBC_40_5:
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block = CRC2Decryptor::NewLC(aKey, KPkcs12CompatibilityBits);
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break;
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default:
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User::Panic(_L("Invalid PBE decryptor"), 1);
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}
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// if aCipher is not stream cipher, create block cipher object
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if(aCipher != ECipherARC4_40 && aCipher != ECipherARC4_128)
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{
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block = CModeCBCDecryptor::NewL(block, aIV);
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CleanupStack::Pop(); //1st block owned by 2nd
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CleanupStack::PushL(block);//2nd block
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CPadding* padding = CPaddingSSLv3::NewLC(GetBlockBytes(aCipher));
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cipher = CBufferedDecryptor::NewL(block, padding);
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CleanupStack::Pop(padding); //owned by cipher
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CleanupStack::Pop(block); //owned by cipher
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}
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return cipher;
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}
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