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/*
* (C) 2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "apps.h"
#if defined(BOTAN_HAS_DL_GROUP)
#include <botan/dl_group.h>
#include <fstream>
namespace {
std::string read_file_contents(const std::string& filename)
{
std::ifstream in(filename.c_str());
if(!in.good())
throw std::runtime_error("Failure reading " + filename);
std::vector<std::string> contents;
size_t total_size = 0;
while(in.good())
{
std::string line;
std::getline(in, line);
total_size += line.size();
contents.push_back(std::move(line));
}
std::string res;
contents.reserve(total_size);
for(auto&& line : contents)
res += line;
return res;
}
int dl_group(const std::vector<std::string> &args)
{
if(args.size() < 2)
{
std::cout << "Usage: " << args[0] << " [create bits|info file]" << std::endl;
return 1;
}
const std::string cmd = args[1];
if(cmd == "create")
{
AutoSeeded_RNG rng;
const size_t bits = to_u32bit(args[2]);
const DL_Group::PrimeType prime_type = DL_Group::Strong;
//const DL_Group::PrimeType prime_type = DL_Group::Prime_Subgroup;
DL_Group grp(rng, prime_type, bits);
std::cout << grp.PEM_encode(DL_Group::DSA_PARAMETERS);
}
else if(cmd == "info")
{
DL_Group grp;
std::string pem = read_file_contents(args[2]);
std::cout << pem << "\n";
std::cout << "DL_Group " << grp.get_p().bits() << " bits\n";
std::cout << "p=" << grp.get_p() << "\n";
std::cout << "q=" << grp.get_q() << "\n";
std::cout << "g=" << grp.get_g() << "\n";
}
else
{
std::cout << "ERROR: Unknown command\n";
return 1;
}
return 0;
}
REGISTER_APP(dl_group);
}
#endif
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