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/*
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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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@file
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@publishedPartner
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@released
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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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* 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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* 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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* 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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#endif //__CRYPTOSTRENGTH_H__
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