std::string EC_Group::PEM_encode() const
   {
   const std::vector<uint8_t> der = DER_encode(EC_DOMPAR_ENC_EXPLICIT);
   return PEM_Code::encode(der, "EC PARAMETERS");
   }
std::string EC_Group::PEM_encode() const
   {
   const std::vector<uint8_t> der = DER_encode(EC_DOMPAR_ENC_EXPLICIT);
   return PEM_Code::encode(der, "EC PARAMETERS");
   }