mirror of
https://github.com/paboyle/Grid.git
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100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./lib/util/Sha.h
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Copyright (C) 2018
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Author: Peter Boyle
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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extern "C" {
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#include <openssl/sha.h>
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}
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#ifdef USE_IPP
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#include "ipp.h"
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#endif
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#pragma once
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class GridChecksum
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{
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public:
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static inline uint32_t crc32(const void *data, size_t bytes)
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{
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return ::crc32(0L,(unsigned char *)data,bytes);
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}
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#ifdef USE_IPP
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static inline uint32_t crc32c(const void* data, size_t bytes)
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{
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uint32_t crc32c = ~(uint32_t)0;
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ippsCRC32C_8u(reinterpret_cast<const unsigned char *>(data), bytes, &crc32c);
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ippsSwapBytes_32u_I(&crc32c, 1);
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return ~crc32c;
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}
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#endif
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template <typename T>
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static inline std::string sha256_string(const std::vector<T> &hash)
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{
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std::stringstream sha;
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std::string s;
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for(unsigned int i = 0; i < hash.size(); i++)
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{
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sha << std::hex << static_cast<unsigned int>(hash[i]);
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}
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s = sha.str();
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return s;
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}
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static inline std::vector<unsigned char> sha256(const void *data,size_t bytes)
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{
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std::vector<unsigned char> hash(SHA256_DIGEST_LENGTH);
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SHA256_CTX sha256;
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SHA256_Init (&sha256);
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SHA256_Update(&sha256, data,bytes);
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SHA256_Final (&hash[0], &sha256);
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return hash;
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}
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static inline std::vector<int> sha256_seeds(const std::string &s)
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{
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std::vector<int> seeds;
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std::vector<unsigned char> uchars = sha256((void *)s.c_str(),s.size());
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for(int i=0;i<uchars.size();i++) seeds.push_back(uchars[i]);
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return seeds;
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}
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};
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/*
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int main(int argc,char **argv)
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{
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std::string s("The quick brown fox jumps over the lazy dog");
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auto csum = GridChecksum::sha256_seeds(s);
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std::cout << "SHA256 sum is 0x";
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for(int i=0;i<csum.size;i++) {
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std::cout << std::hex << csum[i];
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}
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std::cout << std::endl;
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}
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*/
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