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https://github.com/RGBCube/serenity
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e12a707ca1
Since we were just repeatedly calling `->open()` on the same Core::File no one was clearing it's internal buffer, which means hashing multiple files in one go would result in different hashes than hashing each file separately.
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
/*
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* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCore/ArgsParser.h>
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#include <LibCore/File.h>
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#include <LibCrypto/Hash/HashManager.h>
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#include <unistd.h>
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int main(int argc, char** argv)
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{
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if (pledge("stdio rpath", nullptr) < 0) {
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perror("pledge");
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return 1;
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}
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auto program_name = StringView { argv[0] };
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auto hash_kind = Crypto::Hash::HashKind::None;
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if (program_name == "md5sum")
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hash_kind = Crypto::Hash::HashKind::MD5;
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else if (program_name == "sha1sum")
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hash_kind = Crypto::Hash::HashKind::SHA1;
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else if (program_name == "sha256sum")
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hash_kind = Crypto::Hash::HashKind::SHA256;
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else if (program_name == "sha512sum")
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hash_kind = Crypto::Hash::HashKind::SHA512;
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if (hash_kind == Crypto::Hash::HashKind::None) {
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warnln("Error: program must be executed as 'md5sum', 'sha1sum', 'sha256sum' or 'sha512sum'; got '{}'", argv[0]);
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exit(1);
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}
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auto hash_name = program_name.substring_view(0, program_name.length() - 3).to_string().to_uppercase();
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auto paths_help_string = String::formatted("File(s) to print {} checksum of", hash_name);
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Vector<String> paths;
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Core::ArgsParser args_parser;
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args_parser.add_positional_argument(paths, paths_help_string.characters(), "path", Core::ArgsParser::Required::No);
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args_parser.parse(argc, argv);
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if (paths.is_empty())
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paths.append("-");
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Crypto::Hash::Manager hash;
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hash.initialize(hash_kind);
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auto has_error = false;
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for (auto const& path : paths) {
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NonnullRefPtr<Core::File> file = Core::File::standard_input();
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if (path != "-"sv) {
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auto file_or_error = Core::File::open(path, Core::OpenMode::ReadOnly);
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if (file_or_error.is_error()) {
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warnln("{}: {}: {}", argv[0], path, file->error_string());
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has_error = true;
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continue;
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}
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file = file_or_error.release_value();
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}
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while (!file->eof() && !file->has_error())
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hash.update(file->read(PAGE_SIZE));
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auto digest = hash.digest();
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auto digest_data = digest.immutable_data();
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StringBuilder builder;
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for (size_t i = 0; i < hash.digest_size(); ++i)
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builder.appendff("{:02x}", digest_data[i]);
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auto hash_sum_hex = builder.build();
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outln("{} {}", hash_sum_hex, path);
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}
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return has_error ? 1 : 0;
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}
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