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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 <LibCrypto/Hash/HashManager.h>
#include <unistd.h>
int main(int argc, char** argv)
{
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
auto program_name = StringView { argv[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 '{}'", argv[0]);
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<String> paths;
Core::ArgsParser args_parser;
args_parser.add_positional_argument(paths, paths_help_string.characters(), "path", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
if (paths.is_empty())
paths.append("-");
Crypto::Hash::Manager hash;
hash.initialize(hash_kind);
bool success;
auto has_error = false;
auto file = Core::File::construct();
for (auto const& path : paths) {
if (path == "-") {
success = file->open(STDIN_FILENO, Core::OpenMode::ReadOnly, Core::File::ShouldCloseFileDescriptor::No);
} else {
file->set_filename(path);
success = file->open(Core::OpenMode::ReadOnly);
}
if (!success) {
warnln("{}: {}: {}", argv[0], path, file->error_string());
has_error = true;
continue;
}
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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