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//
// SHA2Engine.h
//
// Library: Foundation
// Package: Crypt
// Module: SHA2Engine
//
// Definition of class SHA2Engine.
//
// Secure Hash Standard SHA-2 algorithm
// (FIPS 180-4, see http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf)
//
// Based on the implementation of mbed TLS (Apache 2.0)
// http://www.apache.org/licenses/LICENSE-2.0
//
// Copyright (c) 2017, Applied Informatics Software Engineering GmbH
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_SHA2Engine_INCLUDED
#define Foundation_SHA2Engine_INCLUDED
#include "Poco/Foundation.h"
#include "Poco/DigestEngine.h"
namespace Poco {
class Foundation_API SHA2Engine: public DigestEngine
/// This class implements the SHA-2 message digest algorithm.
/// (FIPS 180-4, see http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf)
{
public:
enum ALGORITHM
{
SHA_224 = 1,
SHA_256,
SHA_384,
SHA_512,
SHA_512_224,
SHA_512_256
};
SHA2Engine(ALGORITHM algorithm = SHA_256);
virtual ~SHA2Engine();
std::size_t digestLength() const;
void reset();
const DigestEngine::Digest& digest();
protected:
void updateImpl(const void* data, std::size_t length);
private:
void transform();
void* _context;
ALGORITHM _algorithm;
DigestEngine::Digest _digest;
SHA2Engine(const SHA2Engine&);
SHA2Engine& operator = (const SHA2Engine&);
};
class Foundation_API SHA2Engine224 : public SHA2Engine
{
public:
enum
{
BLOCK_SIZE = 64,
DIGEST_SIZE = 28
};
SHA2Engine224(): Poco::SHA2Engine(Poco::SHA2Engine::ALGORITHM::SHA_224)
{
}
virtual ~SHA2Engine224()
{
}
};
class Foundation_API SHA2Engine256 : public SHA2Engine
{
public:
enum
{
BLOCK_SIZE = 64,
DIGEST_SIZE = 32
};
SHA2Engine256(): Poco::SHA2Engine(Poco::SHA2Engine::ALGORITHM::SHA_256)
{
}
virtual ~SHA2Engine256()
{
}
};
class Foundation_API SHA2Engine384 : public SHA2Engine
{
public:
enum
{
BLOCK_SIZE = 128,
DIGEST_SIZE = 48
};
SHA2Engine384(): Poco::SHA2Engine(Poco::SHA2Engine::ALGORITHM::SHA_384)
{
}
virtual ~SHA2Engine384()
{
}
};
class Foundation_API SHA2Engine512 : public SHA2Engine
{
public:
enum
{
BLOCK_SIZE = 128,
DIGEST_SIZE = 64
};
SHA2Engine512(): Poco::SHA2Engine(Poco::SHA2Engine::ALGORITHM::SHA_512)
{
}
virtual ~SHA2Engine512()
{
}
};
} // namespace Poco
#endif // Foundation_SHA2Engine_INCLUDED
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