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104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
//
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// SHA1Engine.h
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//
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// $Id: //poco/Main/Foundation/include/Poco/SHA1Engine.h#3 $
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//
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// Library: Foundation
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// Package: Crypt
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// Module: SHA1Engine
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//
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// Definition of class SHA1Engine.
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//
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// Secure Hash Standard SHA-1 algorithm
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// (FIPS 180-1, see http://www.itl.nist.gov/fipspubs/fip180-1.htm)
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//
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// Based on the public domain implementation by Peter C. Gutmann
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// on 2 Sep 1992, modified by Carl Ellison to be SHA-1.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_SHA1Engine_INCLUDED
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#define Foundation_SHA1Engine_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/DigestEngine.h"
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namespace Poco {
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class Foundation_API SHA1Engine: public DigestEngine
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/// This class implementes the SHA-1 message digest algorithm.
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/// (FIPS 180-1, see http://www.itl.nist.gov/fipspubs/fip180-1.htm)
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{
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public:
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enum
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{
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BLOCK_SIZE = 64,
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DIGEST_SIZE = 20
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};
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SHA1Engine();
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~SHA1Engine();
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unsigned digestLength() const;
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void reset();
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const DigestEngine::Digest& digest();
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protected:
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void updateImpl(const void* data, unsigned length);
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private:
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void transform();
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static void byteReverse(UInt32* buffer, int byteCount);
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typedef UInt8 BYTE;
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struct Context
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{
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UInt32 digest[5]; // Message digest
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UInt32 countLo; // 64-bit bit count
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UInt32 countHi;
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UInt32 data[16]; // SHA data buffer
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UInt32 slop; // # of bytes saved in data[]
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};
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Context _context;
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DigestEngine::Digest _digest;
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SHA1Engine(const SHA1Engine&);
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SHA1Engine& operator = (const SHA1Engine&);
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};
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} // namespace Poco
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#endif // Foundation_SHA1Engine_INCLUDED
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