1 /*

     2 * Copyright (c) 2006-2009 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 *

    16 */

    17 

    18 

    19 #ifndef __RSAIMPL_H__

    20 #define __RSAIMPL_H__

    21 

    22 /**

    23 @file 

    24 @internalComponent

    25 @released

    26 */

    27 

    28 #include <e32base.h>

    29 #include <e32cmn.h>

    30 #include "keys.h"

    31 #include "asymmetriccipherimpl.h"

    32 

    33 /**

    34  * Implementation of RSA encryption as described in PKCS#1 v1.5.

    35  */

    36 namespace SoftwareCrypto

    37 	{

    38 	using namespace CryptoSpi;

    39 

    40 	NONSHARABLE_CLASS(CRSAImpl) : public CAsymmetricCipherImpl

    41 		{

    42 	public:

    43 	

    44 		/**

    45 		Creates an instance of an RSA asymmetric cipher plug-in.

    46 		@param aKey The key

    47 		@param aCryptoMode Whether to encrypt or decrypt

    48 		@param aPadding The padding scheme to use None, SSLv3, PKCS#7

    49 		@return A pointer to a CRSAImpl instance

    50 		*/

    51 		static CRSAImpl* NewL(TUid aImplementationUid, const CKey& aKey,

    52 			TUid aCryptoMode, TUid aPadding);

    53 

    54 		/**

    55 		Creates an instance of an RSA asymmetric cipher plug-in.

    56 		A pointer to the plug-in instance is placed on the cleanup stack.

    57 		@param aKey The key

    58 		@param aCryptoMode Whether to encrypt or decrypt

    59 		@param aPadding The padding scheme to use None, SSLv3, PKCS#7

    60 		@return A pointer to a CRSAImpl instance

    61 		*/

    62 		static CRSAImpl* NewLC(TUid aImplementationUid, const CKey& aKey,

    63 			TUid aCryptoMode, TUid aPadding);

    64 

    65 		// Override CAsymmetricCipherImpl virtual functions

    66 		TUid ImplementationUid() const;

    67 		TBool IsValidKeyLengthL(TInt aKeyBytes) const;

    68 		TInt GetMaximumInputLengthL() const;

    69 		TInt GetMaximumOutputLengthL() const;

    70 		void ProcessL(const TDesC8& aInput, TDes8& aOutput);

    71 		// End of CAsymmetricCipherImpl

    72 		

    73 		const CExtendedCharacteristics* GetExtendedCharacteristicsL();

    74 		static CExtendedCharacteristics* CreateExtendedCharacteristicsL();

    75 

    76 		// Destructor

    77 		~CRSAImpl();

    78 

    79 	private:

    80 		/**

    81 		Constructor

    82 		@param aCryptoMode Whether to encrypt or decrypt

    83 		@param aPaddingMode The padding mode to use. None, SSL, PKCS#7

    84 		*/

    85 		CRSAImpl(TUid aImplementationUid, TUid aCryptoMode, TUid aPaddingMode);

    86 			

    87 		/// second phase of construction

    88 		void ConstructL(const CKey& aKey);

    89 		

    90 		/// for internal usage, called from ProcessL

    91 		void EncryptL(const TDesC8& aInput, TDes8& aOutput) const;

    92 		void DecryptL(const TDesC8& aInput, TDes8& aOutput) const;

    93 		

    94 	private:

    95 	

    96 		TUid iImplementationUid; 

    97 

    98 		};

    99 	}

   100 

   101 #endif // __RSAIMPL_H__