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73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
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//
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// SHA2Engine.h
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//
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// Library: Foundation
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// Package: Crypt
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// Module: SHA2Engine
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//
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// Definition of class SHA2Engine.
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//
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// Secure Hash Standard SHA-2 algorithm
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// (FIPS 180-4, see http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf)
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//
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// Based on the implementation of mbed TLS (Apache 2.0)
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Copyright (c) 2017, 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_SHA2Engine_INCLUDED
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#define Foundation_SHA2Engine_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 SHA2Engine: public DigestEngine
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/// This class implements the SHA-2 message digest algorithm.
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/// (FIPS 180-4, see http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf)
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{
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public:
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enum ALGORITHM
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{
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SHA_224 = 224,
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SHA_256 = 256,
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SHA_384 = 384,
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SHA_512 = 512
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};
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SHA2Engine(ALGORITHM algorithm = SHA_256);
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~SHA2Engine();
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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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void* _context;
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ALGORITHM _algorithm;
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DigestEngine::Digest _digest;
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SHA2Engine(const SHA2Engine&);
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SHA2Engine& operator = (const SHA2Engine&);
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};
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} // namespace Poco
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#endif // Foundation_SHA2Engine_INCLUDED
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