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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 "cmd_parser.hpp"
#include "data_parsers.hpp"
#include <aesxx/all.hpp>
#include <boost/program_options.hpp>
#include <deque>
#include <iterator>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
class BlockSettings : public SettingsParser {
public:
class Input {
public:
Input(std::string_view key, std::string_view iv, std::vector<std::string>&& blocks)
: key{key}, iv{iv}, blocks{std::move(blocks)} {}
Input(std::string key, std::vector<std::string>&& blocks)
: key{key}, blocks{std::move(blocks)} {}
std::string get_key() const {
return key;
}
bool has_iv() const {
return !iv.empty();
}
std::string get_iv() const {
return iv;
}
std::vector<std::string> get_blocks() const {
return blocks;
}
private:
std::string key;
std::string iv;
std::vector<std::string> blocks;
};
explicit BlockSettings(std::string_view argv0) : SettingsParser{argv0} {
visible.add_options()(
"verbose,v", boost::program_options::bool_switch(&_verbose), "enable verbose output"
);
visible.add_options()(
"algorithm,a",
boost::program_options::value<aes::Algorithm>(&algorithm)
->required()
->value_name("NAME"),
"set algorithm"
);
visible.add_options()(
"mode,m",
boost::program_options::value<aes::Mode>(&mode)->required()->value_name("MODE"),
"set mode of operation"
);
visible.add_options()(
"use-boxes,b",
boost::program_options::bool_switch(&_use_boxes),
"use the \"boxes\" interface"
);
}
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 {
std::vector<std::string> args;
hidden.add_options()(
"args",
boost::program_options::value<std::vector<std::string>>(&args),
"shouldn't be visible"
);
positional.add("args", -1);
SettingsParser::parse(argc, argv);
if (exit_with_usage())
return;
parse_inputs(
std::deque<std::string>{
std::make_move_iterator(args.begin()), std::make_move_iterator(args.end())
}
);
}
aes::Algorithm get_algorithm() const {
return algorithm;
}
aes::Mode get_mode() const {
return mode;
}
const std::vector<Input>& get_inputs() const {
return inputs;
}
bool use_boxes() const {
return _use_boxes;
}
bool verbose() const {
return _verbose;
}
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;
}
aes::Algorithm algorithm;
aes::Mode mode;
std::vector<Input> inputs;
bool _use_boxes = false;
bool _verbose = false;
};
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