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// Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "AES tools" project.
// For details, see https://github.com/egor-tensin/aes-tools.
// Distributed under the MIT License.
#pragma once
#include "block_input.hpp"
#include "data_parsers.hpp"
#include "helpers/command_line.hpp"
#include <aesxx/all.hpp>
#include <boost/program_options.hpp>
#include <deque>
#include <iterator>
#include <string>
#include <utility>
#include <vector>
namespace
{
class BlockSettings : public command_line::SettingsParser
{
public:
aes::Algorithm algorithm = AES_AES128;
aes::Mode mode = AES_ECB;
bool use_boxes = false;
bool verbose = false;
std::vector<Input> inputs;
explicit BlockSettings(const std::string& argv0)
: SettingsParser{argv0}
{
visible.add_options()
("verbose,v",
boost::program_options::bool_switch(&verbose),
"enable verbose output")
("algorithm,a",
boost::program_options::value<aes::Algorithm>(&algorithm)
->required()
->value_name("NAME"),
"set algorithm")
("mode,m",
boost::program_options::value<aes::Mode>(&mode)
->required()
->value_name("MODE"),
"set mode of operation")
("use-boxes,b",
boost::program_options::bool_switch(&use_boxes),
"use the \"boxes\" interface");
hidden.add_options()
("args",
boost::program_options::value<std::vector<std::string>>(&args),
"shouldn't be visible");
positional.add("args", -1);
}
const char* get_short_description() const override
{
return "[-h|--help] [-v|--verbose] [-a|--algorithm NAME] [-m|--mode MODE]"
" [-- KEY [IV] [BLOCK]...]...";
}
void parse(int argc, char* argv[]) override
{
SettingsParser::parse(argc, argv);
parse_inputs(std::deque<std::string>{
std::make_move_iterator(args.begin()),
std::make_move_iterator(args.end())});
}
private:
void parse_inputs(std::deque<std::string>&& src)
{
while (!src.empty())
inputs.emplace_back(parse_input(src));
}
Input parse_input(std::deque<std::string>& src) const
{
std::string key{std::move(src.front())};
src.pop_front();
std::string iv;
if (aes::mode_requires_init_vector(mode))
{
if (src.empty())
{
throw boost::program_options::error{
"an initialization vector is required for the selected mode of operation"};
}
iv = std::move(src.front());
src.pop_front();
}
auto blocks = parse_blocks(src);
if (aes::mode_requires_init_vector(mode))
return {key, iv, std::move(blocks)};
else
return {key, std::move(blocks)};
}
static std::vector<std::string> parse_blocks(std::deque<std::string>& src)
{
std::vector<std::string> blocks;
while (!src.empty())
{
std::string block{std::move(src.front())};
src.pop_front();
if (block == "--")
break;
blocks.emplace_back(std::move(block));
}
return blocks;
}
std::vector<std::string> args;
};
}
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