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bbf2608ac2
The previous library we used (picosha3) returned a wrong hash for one particular file. Though this was quite rare (we only found 1 such file), it was a bug with the library regardless. The current sha3 library now comes from https://github.com/stbrumme/hash-library
44 lines
No EOL
1.2 KiB
C++
44 lines
No EOL
1.2 KiB
C++
#include "hash.hpp"
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// shh, its fine :-)
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#include "sha3.cpp"
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#include <string>
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#include <fstream>
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#include <ciso646>
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#include "picosha2.h"
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#include <vector>
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template <class Func>
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void readBuffered(std::ifstream& stream, Func func) {
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constexpr size_t BUF_SIZE = 4096;
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stream.exceptions(std::ios_base::badbit);
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std::vector<uint8_t> buffer(BUF_SIZE);
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while (true) {
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stream.read(reinterpret_cast<char*>(buffer.data()), BUF_SIZE);
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size_t amt = stream ? BUF_SIZE : stream.gcount();
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func(buffer.data(), amt);
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if (!stream) break;
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}
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}
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std::string calculateSHA3_256(ghc::filesystem::path const& path) {
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std::ifstream file(path, std::ios::binary);
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SHA3 sha;
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readBuffered(file, [&](const void* data, size_t amt) {
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sha.add(data, amt);
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});
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return sha.getHash();
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}
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std::string calculateSHA256(ghc::filesystem::path const& path) {
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std::vector<uint8_t> hash(picosha2::k_digest_size);
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std::ifstream file(path, std::ios::binary);
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picosha2::hash256(file, hash.begin(), hash.end());
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return picosha2::bytes_to_hex_string(hash.begin(), hash.end());
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}
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std::string calculateHash(ghc::filesystem::path const& path) {
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return calculateSHA3_256(path);
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} |