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/**
* \file
* \author Egor Tensin <Egor.Tensin@gmail.com>
* \date 2015
* \copyright This file is licensed under the terms of the MIT License.
* See LICENSE.txt for details.
*/
#include "block_cmd_parser.hpp"
#include "block_dumper.hpp"
#include "block_input.hpp"
#include <aesxx/all.hpp>
#include <boost/program_options.hpp>
#include <exception>
#include <iostream>
#include <stdexcept>
#include <string>
namespace
{
template <aes::Algorithm algorithm, aes::Mode mode>
void encrypt_with_mode(
const Input& input,
bool verbose = false)
{
typename aes::Types<algorithm>::Block iv;
if (aes::ModeRequiresInitializationVector<mode>::value)
{
aes::from_string<algorithm>(iv, input.get_iv_string());
if (verbose)
dump_iv<algorithm>(iv);
}
typename aes::Types<algorithm>::Key key;
aes::from_string<algorithm>(key, input.get_key_string());
if (verbose)
dump_key<algorithm>(key);
aes::EncryptWrapper<algorithm, mode> encrypt(key, iv);
if (verbose)
dump_wrapper<algorithm, mode>(encrypt);
for (const auto& input_block_string : input.get_input_block_strings())
{
typename aes::Types<algorithm>::Block plaintext, ciphertext;
aes::from_string<algorithm>(plaintext, input_block_string);
encrypt.encrypt_block(plaintext, ciphertext);
if (verbose)
{
dump_plaintext<algorithm>(plaintext);
dump_ciphertext<algorithm>(ciphertext);
dump_next_iv<algorithm, mode>(encrypt);
}
else
{
std::cout << aes::to_string<algorithm>(ciphertext) << '\n';
}
}
}
template <aes::Algorithm algorithm>
void encrypt_with_algorithm(
aes::Mode mode,
const Input& input,
bool verbose = false)
{
switch (mode)
{
case AES_ECB:
encrypt_with_mode<algorithm, AES_ECB>(input, verbose);
break;
case AES_CBC:
encrypt_with_mode<algorithm, AES_CBC>(input, verbose);
break;
case AES_CFB:
encrypt_with_mode<algorithm, AES_CFB>(input, verbose);
break;
case AES_OFB:
encrypt_with_mode<algorithm, AES_OFB>(input, verbose);
break;
case AES_CTR:
encrypt_with_mode<algorithm, AES_CTR>(input, verbose);
break;
default:
throw std::runtime_error("the selected mode of operation is not implemented");
break;
}
}
void encrypt_using_cxx_api(
aes::Algorithm algorithm,
aes::Mode mode,
const Input& input,
bool verbose = false)
{
switch (algorithm)
{
case AES_AES128:
encrypt_with_algorithm<AES_AES128>(mode, input, verbose);
break;
case AES_AES192:
encrypt_with_algorithm<AES_AES192>(mode, input, verbose);
break;
case AES_AES256:
encrypt_with_algorithm<AES_AES256>(mode, input, verbose);
break;
default:
throw std::runtime_error("the selected algorithm is not implemented");
break;
}
}
void encrypt_using_particular_box(
aes::Box& box,
const std::vector<std::string>& input_block_strings)
{
for (const auto& input_block_string : input_block_strings)
{
aes::Box::Block plaintext;
box.parse_block(plaintext, input_block_string);
aes::Box::Block ciphertext;
box.encrypt_block(plaintext, ciphertext);
std::cout << box.format_block(ciphertext) << '\n';
}
}
void encrypt_using_boxes(
aes::Algorithm algorithm,
aes::Mode mode,
const Input& input)
{
aes::Box::Key key;
aes::Box::parse_key(key, algorithm, input.get_key_string());
if (aes::mode_requires_initialization_vector(mode))
{
aes::Box::Block iv;
aes::Box::parse_block(iv, algorithm, input.get_iv_string());
encrypt_using_particular_box(
aes::Box(algorithm, key, mode, iv), input.get_input_block_strings());
}
else
{
encrypt_using_particular_box(
aes::Box(algorithm, key), input.get_input_block_strings());
}
}
}
int main(int argc, char** argv)
{
try
{
CommandLineParser cmd_parser(argv[0]);
try
{
std::vector<Input> inputs;
Settings settings;
cmd_parser.parse(settings, argc, argv, inputs);
if (cmd_parser.exit_with_usage())
{
std::cout << cmd_parser;
return 0;
}
for (const auto& input : inputs)
{
if (settings.use_boxes())
{
encrypt_using_boxes(
settings.get_algorithm(),
settings.get_mode(),
input);
}
else
{
encrypt_using_cxx_api(
settings.get_algorithm(),
settings.get_mode(),
input,
settings.verbose());
}
}
return 0;
}
catch (const boost::program_options::error& e)
{
std::cerr << "Usage error: " << e.what() << "\n";
std::cerr << cmd_parser;
return 1;
}
catch (const aes::Error& e)
{
std::cerr << e;
return 1;
}
}
catch (const std::exception& e)
{
std::cerr << e.what() << "\n";
return 1;
}
return 0;
}
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