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// Copyright (c) 2015 Egor Tensin <egor@tensin.name>
// This file is part of the "AES tools" project.
// For details, see https://github.com/egor-tensin/aes-tools
// Distributed under the MIT License.
#include "helpers/cmd_parser_block.hpp"
#include <aesxx/all.hpp>
#include <boost/program_options.hpp>
#include <exception>
#include <format>
#include <iostream>
#include <stdexcept>
#include <string>
namespace {
void decrypt_blocks(
aes::Algorithm algorithm,
aes::Mode mode,
const BlockSettings::Input& input,
bool verbose = false
) {
const auto key = aes::Key::parse(input.get_key(), algorithm);
aes::Box box{algorithm, key, mode, input.get_iv(), verbose};
for (const auto& ciphertext : input.get_blocks()) {
aes::Block plaintext;
box.decrypt_block(ciphertext, plaintext);
std::cout << std::format("{}\n", plaintext.to_string());
}
}
} // namespace
int main(int argc, char** argv) {
try {
BlockSettings settings{argv[0]};
try {
settings.parse(argc, argv);
} catch (const boost::program_options::error& e) {
settings.usage_error(e);
return 1;
}
if (settings.exit_with_usage()) {
settings.usage();
return 0;
}
for (const auto& input : settings.get_inputs()) {
decrypt_blocks(
settings.get_algorithm(), settings.get_mode(), input, settings.get_verbose()
);
}
} catch (const aes::Error& e) {
std::cerr << e;
return 1;
} catch (const std::exception& e) {
std::cerr << std::format("{}\n", e.what());
return 1;
}
return 0;
}
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