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/*
* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCore/System.h>
#include <LibCrypto/Hash/HashManager.h>
#include <LibMain/Main.h>
#include <unistd.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio rpath", nullptr));
auto program_name = arguments.strings[0];
auto hash_kind = Crypto::Hash::HashKind::None;
if (program_name == "md5sum")
hash_kind = Crypto::Hash::HashKind::MD5;
else if (program_name == "sha1sum")
hash_kind = Crypto::Hash::HashKind::SHA1;
else if (program_name == "sha256sum")
hash_kind = Crypto::Hash::HashKind::SHA256;
else if (program_name == "sha512sum")
hash_kind = Crypto::Hash::HashKind::SHA512;
if (hash_kind == Crypto::Hash::HashKind::None) {
warnln("Error: program must be executed as 'md5sum', 'sha1sum', 'sha256sum' or 'sha512sum'; got '{}'", program_name);
exit(1);
}
auto hash_name = program_name.substring_view(0, program_name.length() - 3).to_string().to_uppercase();
auto paths_help_string = String::formatted("File(s) to print {} checksum of", hash_name);
Vector<StringView> paths;
Core::ArgsParser args_parser;
args_parser.add_positional_argument(paths, paths_help_string.characters(), "path", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
if (paths.is_empty())
paths.append("-");
Crypto::Hash::Manager hash;
hash.initialize(hash_kind);
auto has_error = false;
for (auto const& path : paths) {
NonnullRefPtr<Core::File> file = Core::File::standard_input();
if (path != "-"sv) {
auto file_or_error = Core::File::open(path, Core::OpenMode::ReadOnly);
if (file_or_error.is_error()) {
warnln("{}: {}: {}", program_name, path, file->error_string());
has_error = true;
continue;
}
file = file_or_error.release_value();
}
while (!file->eof() && !file->has_error())
hash.update(file->read(PAGE_SIZE));
auto digest = hash.digest();
auto digest_data = digest.immutable_data();
StringBuilder builder;
for (size_t i = 0; i < hash.digest_size(); ++i)
builder.appendff("{:02x}", digest_data[i]);
auto hash_sum_hex = builder.build();
outln("{} {}", hash_sum_hex, path);
}
return has_error ? 1 : 0;
}
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