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83 lines
1.7 KiB
C++
83 lines
1.7 KiB
C++
//
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// SHA1Engine.h
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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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// SPDX-License-Identifier: BSL-1.0
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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/DigestEngine.h"
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#include "Poco/Foundation.h"
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namespace Poco
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{
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class Foundation_API SHA1Engine : public DigestEngine
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/// This class implements 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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std::size_t 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, std::size_t 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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