libcruft-util/hash/sha2.hpp

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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright:
* 2014, Danny Robson <danny@nerdcruft.net>
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*/
#ifndef __UTIL_HASH_SHA2_HPP
#define __UTIL_HASH_SHA2_HPP
#include <array>
#include <cstdint>
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///////////////////////////////////////////////////////////////////////////////
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namespace util { namespace hash {
class SHA256 {
public:
typedef std::array<uint8_t,32> digest_t;
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public:
SHA256();
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void update (const void *restrict, size_t) noexcept;
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void update (const uint8_t *restrict first, const uint8_t *restrict last) noexcept;
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void finish (void);
digest_t digest (void) const;
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void reset (void);
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private:
void process (void);
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uint64_t m_total;
std::array<uint32_t, 8> H;
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union {
std::array<uint32_t, 16> M;
std::array<uint8_t, 64> C;
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};
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};
} }
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#endif