97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
///
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/// \file emsha/internal.h
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/// \author K. Isom <kyle@imap.cc>
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/// \date 2015-12-17
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/// \brief Declares internal interfaces for the emsha library.
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///
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/// The MIT License (MIT)
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///
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/// Copyright (c) 2015 K. Isom <coder@kyleisom.net>
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///
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/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// copy of this software and associated documentation files (the "Software"),
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/// to deal in the Software without restriction, including without limitation
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/// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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/// and/or sell copies of the Software, and to permit persons to whom the
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/// Software is furnished to do so, subject to the following conditions:
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///
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/// The above copyright notice and this permission notice shall be included in
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/// all copies or substantial portions of the Software.
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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 AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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/// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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/// IN THE SOFTWARE.
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///
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#ifndef EMSHA_INTERNAL_H
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#define EMSHA_INTERNAL_H
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#include <cstdint>
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using std::uint8_t;
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using std::uint32_t;
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namespace emsha {
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static inline uint32_t
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rotr32(uint32_t x, uint8_t n)
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{
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return ((x >> n) | (x << (32 - n)));
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}
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static inline uint32_t
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sha_ch(uint32_t x, uint32_t y, uint32_t z)
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{
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return ((x & y) ^ ((~x) & z));
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}
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static inline uint32_t
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sha_maj(uint32_t x, uint32_t y, uint32_t z)
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{
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return (x & y) ^ (x & z) ^ (y & z);
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}
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static inline uint32_t
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sha_Sigma0(uint32_t x)
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{
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return rotr32(x, 2) ^ rotr32(x, 13) ^ rotr32(x, 22);
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}
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static inline uint32_t
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sha_Sigma1(uint32_t x)
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{
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return rotr32(x, 6) ^ rotr32(x, 11) ^ rotr32(x, 25);
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}
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static inline uint32_t
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sha_sigma0(uint32_t x)
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{
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return rotr32(x, 7) ^ rotr32(x, 18) ^ (x >> 3);
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}
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static inline uint32_t
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sha_sigma1(uint32_t x)
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{
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return rotr32(x, 17) ^ rotr32(x, 19) ^ (x >> 10);
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}
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} // end of namespace emsha
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#endif // EMSHA_INTERNAL_H
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