From 3cb7fdea950dd2d0377f0d9ad8a88fcb7c48b842 Mon Sep 17 00:00:00 2001 From: Jedidiah Barber Date: Wed, 14 Jul 2021 11:27:03 +1200 Subject: Initial mirror commit --- Volume/Crc32.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 Volume/Crc32.h (limited to 'Volume/Crc32.h') diff --git a/Volume/Crc32.h b/Volume/Crc32.h new file mode 100644 index 0000000..d439227 --- /dev/null +++ b/Volume/Crc32.h @@ -0,0 +1,44 @@ +/* + Copyright (c) 2008 TrueCrypt Developers Association. All rights reserved. + + Governed by the TrueCrypt License 3.0 the full text of which is contained in + the file License.txt included in TrueCrypt binary and source code distribution + packages. +*/ + +#ifndef TC_HEADER_Encryption_Crc32 +#define TC_HEADER_Encryption_Crc32 + +#include "Platform/Platform.h" +#include "Common/Crc.h" + +namespace TrueCrypt +{ + class Crc32 + { + public: + Crc32 () : CrcValue (0xffffFFFF) { }; + virtual ~Crc32 () { }; + + uint32 Get () const { return CrcValue ^ 0xffffFFFF; } + + uint32 Process (byte data) + { + return CrcValue = crc_32_tab[(byte) (CrcValue ^ data)] ^ (CrcValue >> 8); + } + + static uint32 ProcessBuffer (const ConstBufferPtr &buffer) + { + return ::GetCrc32 (const_cast (buffer.Get()), static_cast (buffer.Size())); + } + + protected: + uint32 CrcValue; + + private: + Crc32 (const Crc32 &); + Crc32 &operator= (const Crc32 &); + }; +} + +#endif // TC_HEADER_Encryption_Crc32 -- cgit