/*+
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* Copyright (c) 2003-2009 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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* ** IMPORTANT ** PublishedPartner API's in this file are published to 3rd party developers via the +
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* Symbian website. Changes to these API's should be treated as PublishedAll API changes and the Security TA should be consulted.+
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*+
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*/+
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+
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+
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+
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+
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/**+
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 @file+
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 @publishedPartner+
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 @released+
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*/+
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+
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#ifndef __CRYPTOSTRENGTH_H__+
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#define __CRYPTOSTRENGTH_H__+
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+
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/**+
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 * Some builds of the crypto library have restrictions that only allow weak+
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 * ciphers to be used.  This class provides static helper functions for+
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 * determining these restrictions.+
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 */+
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class TCrypto+
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	{+
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public:+
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	/**+
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	 * Defines the strength of the cipher. +
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	 */+
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	enum TStrength +
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		{ +
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		EWeak, EStrong+
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		};+
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public:+
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	/**+
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	 * Gets the allowed cipher strength.+
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	 *+
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	 * @return The allowed cipher strength.	+
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	 */	+
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	static IMPORT_C TCrypto::TStrength Strength();+
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+
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	/**+
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	 * Indicates whether a symmetric key is small enough to be allowed. Note+
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	 * that this function leaves if the key is too large - in other words it can+
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	 * never return EFalse.+
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	 * +
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	 * @param aSymmetricKeyBits	    The size (in bits) of the symmetric key+
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	 * @return						Whether the key is small enough to be allowed+
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	 * +
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	 * @leave KErrKeyNotWeakEnough	If the key size is larger than that allowed by the+
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	 *								cipher strength restrictions of the crypto library.+
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	 */+
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	static IMPORT_C TBool IsSymmetricWeakEnoughL(TInt aSymmetricKeyBits);+
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+
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	/**+
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	 * Indicates whether an asymmetric key is small enough to be allowed.  Note+
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	 * that this function leaves if the key is too large - in other words it can+
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	 * never return EFalse.+
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	 *+
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	 * @param aAsymmetricKeyBits	The size (in bits) of the asymmetric key+
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	 * @return						Whether the key is small enough to be allowed+
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	 * +
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	 * @leave KErrKeyNotWeakEnough	If the key size is larger than that allowed by the+
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	 *								cipher strength restrictions of the crypto library.+
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	 */+
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	static IMPORT_C TBool IsAsymmetricWeakEnoughL(TInt aAsymmetricKeyBits);+
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	};+
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+
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#endif //__CRYPTOSTRENGTH_H__+
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