new_contents: #!/usr/bin/python
  # -*- coding: utf-8 -*-
  #
  #  privacyIDEA
  #  2016-04-30 Cornelius Kölbel, <cornelius@privacyidea.org>
  #             initial writeup
  #
  #  (c) 2016 Cornelius Kölbel, cornelius@privacyidea.org
  #
  # This code is free software; you can redistribute it and/or
  # modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
  # License as published by the Free Software Foundation; either
  # version 3 of the License, or any later version.
  #
  # This code 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 AFFERO GENERAL PUBLIC LICENSE for more details.
  #
  # You should have received a copy of the GNU Affero General Public
  # License along with this program.  If not, see <http://www.gnu.org/licenses/>.
  #
  
  from ctypes import CDLL, RTLD_GLOBAL
  from ctypes.util import find_library
  import os
  import binascii
  
  
  class NitroKey(object):
  
      def __init__(self):
          libs = ["libusb-1.0.so", "linux-vdso.so.1", "libhidapi-libusb.so.0",
                  "libstdc++.so.6", "libm.so.6", "libgcc_s.so.1",
                  "libc.so.6", "librt.so.1", "libpthread.so.0", "libudev.so.1",
                  "libcgmanager.so.0", "libnih.so.1",
                  "libdbus-1.so.3"]
          for l in libs:
              CDLL(l, mode = RTLD_GLOBAL)
          lib = find_library("nitrokey")
          print("Using library %s" % lib)
          self.nitrokey = CDLL(lib, mode = RTLD_GLOBAL)
  
      def init_hotp(self, slot, password, slotname, otp_key=None):
          """
          Initilize the given slot with an HOTP key.
  
          If otp_key is not specified, then a random key is generated and
          returned.
  
          :param slot: The slot number, 15-17
          :type slot: int
          :param password: The card password
          :type password: basestring
          :param slotname: The new name of the slot
          :type slotname: basestring
          :param otp_key: The OTP secret key
          :type slotname: A hexstring
          :return: the otp key
          """
          if not otp_key:
              otp_key = binascii.hexlify(os.urandom(20))
          self.nitrokey.initHotp(slot, password, otp_key, slotname)
          return otp_key
  
  
  if __name__ == "__main__":
      Nk = NitroKey()
      otp_key = Nk.init_hotp(15, "12345678", "pi")
      print otp_key
  
subject: add draft for nitrokey