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# gp_sec_ext kdc gpo policy
# Copyright (C) Luke Morrison <luc785@.hotmail.com> 2013
# Copyright (C) David Mulder <dmulder@suse.com> 2018
#
# 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 3 of the License, 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/>.
import os.path
from samba.gpclass import gp_ext_setter, gp_inf_ext
from samba.auth import system_session
from samba.compat import get_string
try:
from ldb import LdbError
from samba.samdb import SamDB
except ImportError:
pass
class inf_to_kdc_tdb(gp_ext_setter):
def mins_to_hours(self):
return '%d' % (int(self.val) / 60)
def days_to_hours(self):
return '%d' % (int(self.val) * 24)
def set_kdc_tdb(self, val):
old_val = self.gp_db.gpostore.get(self.attribute)
self.logger.info('%s was changed from %s to %s' % (self.attribute,
old_val, val))
if val is not None:
self.gp_db.gpostore.store(self.attribute, get_string(val))
self.gp_db.store(str(self), self.attribute, get_string(old_val) if old_val else None)
else:
self.gp_db.gpostore.delete(self.attribute)
self.gp_db.delete(str(self), self.attribute)
def mapper(self):
return {'kdc:user_ticket_lifetime': (self.set_kdc_tdb, self.explicit),
'kdc:service_ticket_lifetime': (self.set_kdc_tdb,
self.mins_to_hours),
'kdc:renewal_lifetime': (self.set_kdc_tdb,
self.days_to_hours),
}
def __str__(self):
return 'Kerberos Policy'
class inf_to_ldb(gp_ext_setter):
'''This class takes the .inf file parameter (essentially a GPO file mapped
to a GUID), hashmaps it to the Samba parameter, which then uses an ldb
object to update the parameter to Samba4. Not registry oriented whatsoever.
'''
def __init__(self, logger, gp_db, lp, creds, key, value):
super(inf_to_ldb, self).__init__(logger, gp_db, lp, creds, key, value)
try:
self.ldb = SamDB(self.lp.samdb_url(),
session_info=system_session(),
credentials=self.creds,
lp=self.lp)
except (NameError, LdbError):
raise Exception('Failed to load SamDB for assigning Group Policy')
def ch_minPwdAge(self, val):
old_val = self.ldb.get_minPwdAge()
self.logger.info('KDC Minimum Password age was changed from %s to %s'
% (old_val, val))
self.gp_db.store(str(self), self.attribute, str(old_val))
self.ldb.set_minPwdAge(val)
def ch_maxPwdAge(self, val):
old_val = self.ldb.get_maxPwdAge()
self.logger.info('KDC Maximum Password age was changed from %s to %s'
% (old_val, val))
self.gp_db.store(str(self), self.attribute, str(old_val))
self.ldb.set_maxPwdAge(val)
def ch_minPwdLength(self, val):
old_val = self.ldb.get_minPwdLength()
self.logger.info(
'KDC Minimum Password length was changed from %s to %s'
% (old_val, val))
self.gp_db.store(str(self), self.attribute, str(old_val))
self.ldb.set_minPwdLength(val)
def ch_pwdProperties(self, val):
old_val = self.ldb.get_pwdProperties()
self.logger.info('KDC Password Properties were changed from %s to %s'
% (old_val, val))
self.gp_db.store(str(self), self.attribute, str(old_val))
self.ldb.set_pwdProperties(val)
def days2rel_nttime(self):
seconds = 60
minutes = 60
hours = 24
sam_add = 10000000
val = (self.val)
val = int(val)
return str(-(val * seconds * minutes * hours * sam_add))
def mapper(self):
'''ldap value : samba setter'''
return {"minPwdAge": (self.ch_minPwdAge, self.days2rel_nttime),
"maxPwdAge": (self.ch_maxPwdAge, self.days2rel_nttime),
# Could be none, but I like the method assignment in
# update_samba
"minPwdLength": (self.ch_minPwdLength, self.explicit),
"pwdProperties": (self.ch_pwdProperties, self.explicit),
}
def __str__(self):
return 'System Access'
class gp_sec_ext(gp_inf_ext):
'''This class does the following two things:
1) Identifies the GPO if it has a certain kind of filepath,
2) Finally parses it.
'''
count = 0
def __str__(self):
return "Security GPO extension"
def apply_map(self):
return {"System Access": {"MinimumPasswordAge": ("minPwdAge",
inf_to_ldb),
"MaximumPasswordAge": ("maxPwdAge",
inf_to_ldb),
"MinimumPasswordLength": ("minPwdLength",
inf_to_ldb),
"PasswordComplexity": ("pwdProperties",
inf_to_ldb),
},
"Kerberos Policy": {"MaxTicketAge": (
"kdc:user_ticket_lifetime",
inf_to_kdc_tdb
),
"MaxServiceAge": (
"kdc:service_ticket_lifetime",
inf_to_kdc_tdb
),
"MaxRenewAge": (
"kdc:renewal_lifetime",
inf_to_kdc_tdb
),
}
}
def process_group_policy(self, deleted_gpo_list, changed_gpo_list):
if self.lp.get('server role') != 'active directory domain controller':
return
inf_file = 'MACHINE/Microsoft/Windows NT/SecEdit/GptTmpl.inf'
apply_map = self.apply_map()
for gpo in deleted_gpo_list:
self.gp_db.set_guid(gpo[0])
for section in gpo[1].keys():
current_section = apply_map.get(section)
if not current_section:
continue
for key, value in gpo[1][section].items():
setter = None
for _, tup in current_section.items():
if tup[0] == key:
setter = tup[1]
if setter:
value = value.encode('ascii', 'ignore') \
if value else value
setter(self.logger, self.gp_db, self.lp, self.creds,
key, value).delete()
self.gp_db.delete(section, key)
self.gp_db.commit()
for gpo in changed_gpo_list:
if gpo.file_sys_path:
self.gp_db.set_guid(gpo.name)
path = os.path.join(gpo.file_sys_path, inf_file)
inf_conf = self.parse(path)
if not inf_conf:
continue
for section in inf_conf.sections():
current_section = apply_map.get(section)
if not current_section:
continue
for key, value in inf_conf.items(section):
if current_section.get(key):
(att, setter) = current_section.get(key)
value = value.encode('ascii', 'ignore')
setter(self.logger, self.gp_db, self.lp,
self.creds, att, value).update_samba()
self.gp_db.commit()
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