// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// Mobius Forensic Toolkit
// Copyright (C) 2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021 Eduardo Aguiar
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option) any later
// version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
// Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
#include <pymobius.h>
#include <pygil.h>
#include <mobius/crypt/pkcs5.h>

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief pbkdf2_hmac function implementation
//! \param self function object
//! \param args argument list
//! \return Python object
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
PyObject *
func_pbkdf2_hmac (PyObject *, PyObject *args)
{
  // parse input args
  std::string arg_hash_id;
  mobius::bytearray arg_key;
  mobius::bytearray arg_salt;
  std::uint32_t arg_iterations;
  std::uint16_t arg_dklen;

  try
    {
      arg_hash_id = mobius::py::get_arg_as_std_string (args, 0);
      arg_key = mobius::py::get_arg_as_bytearray (args, 1);
      arg_salt = mobius::py::get_arg_as_bytearray (args, 2);
      arg_iterations = mobius::py::get_arg_as_uint32_t (args, 3);
      arg_dklen = mobius::py::get_arg_as_uint16_t (args, 4);
    }
  catch (const std::exception& e)
    {
      PyErr_SetString (PyExc_TypeError, e.what ());
      return nullptr;
    }

  // execute C++ function
  PyObject *ret = nullptr;

  try
    {
      auto dk = mobius::py::GIL () (
		  mobius::crypt::pbkdf2_hmac (
                    arg_hash_id,
                    arg_key,
                    arg_salt,
                    arg_iterations,
                    arg_dklen
                  )
                );
      ret = mobius::py::pybytes_from_bytearray (dk);
    }
  catch (const std::exception& e)
    {
      PyErr_SetString (PyExc_IOError, e.what ());
    }

  return ret;
}
