#!/usr/bin/python2.7
# -*- coding: utf-8 -*-
#
# OPSI plugin for UMC Module computerroom
#  password rotation hook script
#
# Copyright 2015 Univention GmbH
#
# http://www.univention.de/
#
# All rights reserved.
#
# The source code of this program is made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
#
# Binary versions of this program provided by Univention to you as
# well as other copyrighted, protected or trademarked materials like
# Logos, graphics, fonts, specific documentations and configurations,
# cryptographic keys etc. are subject to a license agreement between
# you and Univention and not subject to the GNU AGPL V3.
#
# In the case you use this program under the terms of the GNU AGPL V3,
# the program is provided 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 with the Debian GNU/Linux or Univention distribution in file
# /usr/share/common-licenses/AGPL-3; if not, see
# <http://www.gnu.org/licenses/>.

import sys
if 'postchange' not in sys.argv:
	sys.exit(0)

from subprocess import Popen, PIPE
import httplib

from univention.lib.umc_connection import UMCConnection
from univention.config_registry import ConfigRegistry
ucr = ConfigRegistry()
ucr.load()

def postchange():
	username = ucr['opsi/http/username']
	with open(ucr['opsi/http/passwordfile'], 'rb') as fd:
		password = fd.read().rstrip()

	p = Popen(['/usr/bin/makepasswd', '--chars=20'], stdout=PIPE)
	new_password, _ = p.communicate()
	if p.returncode or not new_password:
		sys.exit(1)

	c = UMCConnection('localhost', username, password)
	c.request('', {'password': {'password': password, 'new_password': new_password}}, command='set')

	with open(ucr['opsi/http/passwordfile'], 'wb') as fd:
		fd.write(new_password)

try:
	postchange()
except IOError as exc:
	print 'Error reading/writing passwordfile:', exc
except httplib.HTTPException as exc:
	print 'Error changing password:', exc
