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/*
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* Copyright (c) 2006-2009 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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* Random generator interface
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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 __CRYPTOAPI_RANDOMPLUGIN_H__
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#define __CRYPTOAPI_RANDOMPLUGIN_H__
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#include <cryptospi/cryptoplugin.h>
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namespace CryptoSpi
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{
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/**
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A pseudo-random number generator (PRNG).
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Generates random numbers derived from entropy obtained from another
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source, usually a hardware random number generator or if unavailable,
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from a combination variety of unpredictable system variables, added
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to an entropy pool which is used for seeding. This might include
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keypresses generated by a user, hardware interrupts, etc.
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*/
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class MRandom : public MPlugin
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{
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public:
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/**
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* Implementations of this method should fill the passed
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* buffer with the generated pseudo-random data up to the
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* current length, discarding any current contents. The
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* implementations should leave with KErrNotSecure when
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* the generated random data is not secure enough.
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*
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* @param aDest The buffer to fill with random data
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* @leave KErrNotSecure Random data generated is not
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* secure enough for crytographic operations
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* otherwise, leaves with any other system wide error code.
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*
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*/
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virtual void GenerateRandomBytesL(TDes8& aDest) = 0;
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};
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class MAsyncRandom : public MPlugin
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{
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public:
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/**
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* Implementations of this method should fill the passed
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* buffer with the generated pseudo-random data up to the
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* current length, discarding any current contents. The
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* implementations should leave with KErrNotSecure when
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* the generated random data is not secure enough.
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*
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* @param aDest The buffer to fill with random data
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* @param aStatus The argument to carry the asynchonous request completion
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* status to notify the client when buffer is filled with random data.
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* @leave KErrNotSecure Random data generated is not
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* secure enough for crytographic operations
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* otherwise, leaves with any other system wide error code.
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*
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*/
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virtual void GenerateRandomBytesL(TDes8& aDest, TRequestStatus& aStatus) = 0;
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/**
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Cancel an outstanding request
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*/
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virtual void Cancel() = 0;
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};
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}
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#endif // __CRYPTOAPI_RANDOMPLUGIN_H__
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