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https://github.com/veracrypt/VeraCrypt.git
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45 lines
973 B
C++
45 lines
973 B
C++
/*
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Copyright (c) 2008 TrueCrypt Developers Association. All rights reserved.
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Governed by the TrueCrypt License 3.0 the full text of which is contained in
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the file License.txt included in TrueCrypt binary and source code distribution
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packages.
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*/
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#ifndef TC_HEADER_Encryption_Crc32
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#define TC_HEADER_Encryption_Crc32
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#include "Platform/Platform.h"
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#include "Common/Crc.h"
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namespace VeraCrypt
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{
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class Crc32
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{
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public:
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Crc32 () : CrcValue (0xffffFFFF) { };
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virtual ~Crc32 () { };
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uint32 Get () const { return CrcValue ^ 0xffffFFFF; }
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uint32 Process (byte data)
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{
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return CrcValue = crc_32_tab[(byte) (CrcValue ^ data)] ^ (CrcValue >> 8);
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}
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static uint32 ProcessBuffer (const ConstBufferPtr &buffer)
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{
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return ::GetCrc32 (const_cast<byte *> (buffer.Get()), static_cast<int> (buffer.Size()));
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}
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protected:
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uint32 CrcValue;
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private:
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Crc32 (const Crc32 &);
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Crc32 &operator= (const Crc32 &);
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};
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}
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#endif // TC_HEADER_Encryption_Crc32
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