58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
/*
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Copyright 2025 Yağız Zengin
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <fstream>
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#include <iostream>
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#include <libhelper/lib.hpp>
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#include <optional>
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#include <picosha2.h>
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#include <string>
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#include <sys/stat.h>
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#include <vector>
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namespace Helper {
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std::optional<std::string> sha256Of(const std::string_view path) {
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LOGN(HELPER, INFO)
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<< "get sha256 of \"" << path
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<< "\" request. Getting full path (if input is link and exists)."
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<< std::endl;
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std::string fp = (isLink(path)) ? readSymlink(path) : std::string(path);
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if (!fileIsExists(fp))
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throw Error("Is not exists or not file: %s", fp.data());
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if (const std::ifstream file(fp, std::ios::binary); !file)
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throw Error("Cannot open file: %s", fp.data());
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std::vector<unsigned char> hash(picosha2::k_digest_size);
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picosha2::hash256(fp, hash.begin(), hash.end());
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LOGN(HELPER, INFO) << "get sha256 of \"" << path << "\" successfully."
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<< std::endl;
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return picosha2::bytes_to_hex_string(hash.begin(), hash.end());
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}
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bool sha256Compare(const std::string_view file1, const std::string_view file2) {
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LOGN(HELPER, INFO) << "comparing sha256 signatures of input files."
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<< std::endl;
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const auto f1 = sha256Of(file1);
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const auto f2 = sha256Of(file2);
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if (f1->empty() || f2->empty()) return false;
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LOGN_IF(HELPER, INFO, *f1 == *f2)
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<< "(): input files is contains same sha256 signature." << std::endl;
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return (*f1 == *f2);
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}
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} // namespace Helper
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