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62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
/*
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Derived from source code of TrueCrypt 7.1a, which is
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Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
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by the TrueCrypt License 3.0.
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Modifications and additions to the original source code (contained in this file)
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and all other portions of this file are Copyright (c) 2013-2017 IDRIX
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and are governed by the Apache License 2.0 the full text of which is
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contained in the file License.txt included in VeraCrypt binary and source
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code distribution packages.
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*/
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#ifndef TC_HEADER_Core_RandomNumberGenerator
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#define TC_HEADER_Core_RandomNumberGenerator
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#include "Platform/Platform.h"
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#include "Volume/Hash.h"
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#include "Common/Random.h"
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#include "Crypto/jitterentropy.h"
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namespace VeraCrypt
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{
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class RandomNumberGenerator
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{
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public:
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static void AddToPool (const ConstBufferPtr &buffer);
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static void GetData (const BufferPtr &buffer, bool allowAnyLength = false) { GetData (buffer, false, allowAnyLength); }
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static void GetDataFast (const BufferPtr &buffer, bool allowAnyLength = false) { GetData (buffer, true, allowAnyLength); }
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static shared_ptr <Hash> GetHash ();
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static bool IsEnrichedByUser () { return EnrichedByUser; }
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static bool IsRunning () { return Running; }
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static ConstBufferPtr PeekPool () { return Pool; }
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static void SetEnrichedByUserStatus (bool enriched) { EnrichedByUser = enriched; }
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static void SetHash (shared_ptr <Hash> hash);
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static void Start ();
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static void Stop ();
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static const size_t PoolSize = RNG_POOL_SIZE;
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protected:
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static void AddSystemDataToPool (bool fast);
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static void GetData (const BufferPtr &buffer, bool fast, bool allowAnyLength);
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static void HashMixPool ();
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static void Test ();
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RandomNumberGenerator ();
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static const size_t MaxBytesAddedBeforePoolHashMix = RANDMIX_BYTE_INTERVAL;
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static Mutex AccessMutex;
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static size_t BytesAddedSincePoolHashMix;
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static bool EnrichedByUser;
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static SecureBuffer Pool;
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static shared_ptr <Hash> PoolHash;
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static size_t ReadOffset;
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static bool Running;
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static size_t WriteOffset;
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static struct rand_data *JitterRngCtx;
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};
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}
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#endif // TC_HEADER_Core_RandomNumberGenerator
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