int
ndnsec_get_default(int argc, char** argv)
{
  using namespace ndn;
  namespace po = boost::program_options;

  bool isGetDefaultId = true;
  bool isGetDefaultKey = false;
  bool isGetDefaultCert = false;
  bool isQuiet = false;
  std::string identityString;
  std::string keyName;

  po::options_description description("General Usage\n  ndnsec get-default [-h] [-k|c] [-i identity|-K key] [-q]\nGeneral options");
  description.add_options()
    ("help,h", "produce help message")
    ("default_key,k", "get default key")
    ("default_cert,c", "get default certificate")
    ("identity,i", po::value<std::string>(&identityString), "target identity")
    ("key,K", po::value<std::string>(&keyName), "target key")
    ("quiet,q", "don't output trailing newline")
    ;

  po::variables_map vm;
  try
    {
      po::store(po::parse_command_line(argc, argv, description), vm);
      po::notify(vm);
    }
  catch (const std::exception& e)
    {
      std::cerr << "ERROR: " << e.what() << std::endl;
      std::cerr << description << std::endl;
      return 1;
    }

  if (vm.count("help") != 0)
    {
      std::cerr << description << std::endl;;
      return 0;
    }

  if (vm.count("default_cert") != 0)
    {
      isGetDefaultCert = true;
      isGetDefaultId = false;
    }
  else if (vm.count("default_key") != 0)
    {
      isGetDefaultKey = true;
      isGetDefaultId = false;
    }

  if (vm.count("quiet") != 0)
    {
      isQuiet = true;
    }

  KeyChain keyChain;

  if (vm.count("key") != 0)
    {
      Name keyNdnName(keyName);
      if (isGetDefaultCert)
        {
          std::cout << keyChain.getDefaultCertificateNameForKey(keyNdnName);
          if (!isQuiet) std::cout << std::endl;
          return 0;
        }
      return 1;
    }
  else if (vm.count("identity") != 0)
    {
      Name identity(identityString);

      if (isGetDefaultKey)
        {
          std::cout << keyChain.getDefaultKeyNameForIdentity(identity);
          if (!isQuiet)
            std::cout << std::endl;

          return 0;
        }
      if (isGetDefaultCert)
        {
          std::cout << keyChain.getDefaultCertificateNameForIdentity(identity);
          if (!isQuiet)
            std::cout << std::endl;

          return 0;
        }
      return 1;
    }
  else
    {
      Name identity = keyChain.getDefaultIdentity();
      if (isGetDefaultId)
        {
          std::cout << identity;
          if (!isQuiet) std::cout << std::endl;
          return 0;
        }
      if (isGetDefaultKey)
        {
          std::cout << keyChain.getDefaultKeyNameForIdentity(identity);
          if (!isQuiet) std::cout << std::endl;
          return 0;
        }
      if (isGetDefaultCert)
        {
          std::cout << keyChain.getDefaultCertificateNameForIdentity(identity);
          if (!isQuiet) std::cout << std::endl;
          return 0;
        }
      return 1;
    }
}
int
ndnsec_sign_req(int argc, char** argv)
{
  using namespace ndn;
  namespace po = boost::program_options;

  std::string name;
  bool isKeyName = false;

  po::options_description description("General Usage\n  ndnsec sign-req [-h] [-k] name\nGeneral options");
  description.add_options()
    ("help,h", "produce help message")
    ("key,k", "optional, if specified, name is keyName (e.g. /ndn/edu/ucla/alice/ksk-123456789), otherwise identity name")
    ("name,n", po::value<std::string>(&name), "name, for example, /ndn/edu/ucla/alice")
    ;

  po::positional_options_description p;
  p.add("name", 1);

  po::variables_map vm;
  try
    {
      po::store(po::command_line_parser(argc, argv).options(description).positional(p).run(),
                vm);
      po::notify(vm);
    }
  catch (const std::exception& e)
    {
      std::cerr << "ERROR: " << e.what() << std::endl;
      std::cerr << description << std::endl;
      return 1;
    }

  if (vm.count("help") != 0)
    {
      std::cerr << description << std::endl;
      return 0;
    }

  if (vm.count("name") == 0)
    {
      std::cerr << "ERROR: name must be specified" << std::endl;
      std::cerr << description << std::endl;
      return 1;
    }

  if (vm.count("key") != 0)
    isKeyName = true;

  shared_ptr<IdentityCertificate> selfSignCert;

  KeyChain keyChain;

  if (isKeyName)
    selfSignCert = keyChain.selfSign(name);
  else {
    Name keyName = keyChain.getDefaultKeyNameForIdentity(name);
    selfSignCert = keyChain.selfSign(keyName);
  }

  if (static_cast<bool>(selfSignCert)) {
    io::save(*selfSignCert, std::cout);
    return 0;
  }
  else {
    std::cerr << "ERROR: Public key does not exist" << std::endl;
    return 1;
  }
}