#!/usr/bin/python3
#
# Univention SSL
#  checks validity of the local SSL certificate
#
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# Copyright 2006-2024 Univention GmbH
#
# https://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
# <https://www.gnu.org/licenses/>.

import calendar
import time

from M2Crypto import X509

from univention.config_registry import ConfigRegistry


_bc = ConfigRegistry()
_bc.load()


def get_validity_date(certFile):
    """returns the validity date fo the locale SSL certificate or None on failure"""
    try:
        x509 = X509.load_cert(certFile)
        return str(x509.get_not_after())
    except Exception:
        return None


def get_validity_days(certFile):
    """
    returns the validity of the local SSL certificate in days. If the
    validity could not be determined 0 is returned
    """
    after = get_validity_date(certFile)
    if after:
        time_after = time.strptime(after, "%b %d %H:%M:%S %Y %Z")
        return calendar.timegm(time_after) // 60 // 60 // 24

    return 0


if __name__ == '__main__':
    fqdn = '.'.join([_bc['hostname'], _bc['domainname']])
    caExpiry = False

    days = get_validity_days('/etc/univention/ssl/%s/cert.pem' % fqdn)
    days_ca = get_validity_days('/etc/univention/ssl/ucsCA/CAcert.pem')

    if days and days != _bc.get('ssl/validity/host', -1):
        _bc['ssl/validity/host'] = str(days)
        _bc.save()

    if days_ca and days_ca != _bc.get('ssl/validity/root', -1):
        _bc['ssl/validity/root'] = str(days_ca)
        _bc.save()
