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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.gp.gpclass import gp_inf_ext
from samba.auth import system_session
from samba.common import get_string
try:
from ldb import LdbError
from samba.samdb import SamDB
except ImportError:
pass
from samba.gp.util.logging import log
def mins_to_hours(val):
return '%d' % (int(val) / 60)
def days_to_hours(val):
return '%d' % (int(val) * 24)
def days2rel_nttime(val):
seconds = 60
minutes = 60
hours = 24
sam_add = 10000000
val = int(val)
return str(-(val * seconds * minutes * hours * sam_add))
class gp_krb_ext(gp_inf_ext):
apply_map = { 'MaxTicketAge': 'kdc:user_ticket_lifetime',
'MaxServiceAge': 'kdc:service_ticket_lifetime',
'MaxRenewAge': 'kdc:renewal_lifetime' }
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'
for guid, settings in deleted_gpo_list:
self.gp_db.set_guid(guid)
for section in settings.keys():
if section == str(self):
for att, value in settings[section].items():
self.set_kdc_tdb(att, value)
self.gp_db.delete(section, att)
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():
if section == str(self):
for key, value in inf_conf.items(section):
if key not in gp_krb_ext.apply_map:
continue
att = gp_krb_ext.apply_map[key]
value_func = self.mapper().get(att)
self.set_kdc_tdb(att, value_func(value))
self.gp_db.commit()
def set_kdc_tdb(self, attribute, val):
old_val = self.gp_db.gpostore.get(attribute)
log.info('%s was changed from %s to %s' % (attribute, old_val, val))
if val is not None:
self.gp_db.gpostore.store(attribute, get_string(val))
self.gp_db.store(str(self), attribute, get_string(old_val)
if old_val else None)
else:
self.gp_db.gpostore.delete(attribute)
self.gp_db.delete(str(self), attribute)
def mapper(self):
return {'kdc:user_ticket_lifetime': lambda val: val,
'kdc:service_ticket_lifetime': mins_to_hours,
'kdc:renewal_lifetime': days_to_hours,
}
def __str__(self):
return 'Kerberos Policy'
def rsop(self, gpo):
output = {}
if self.lp.get('server role') != 'active directory domain controller':
return output
inf_file = 'MACHINE/Microsoft/Windows NT/SecEdit/GptTmpl.inf'
if gpo.file_sys_path:
path = os.path.join(gpo.file_sys_path, inf_file)
inf_conf = self.parse(path)
if not inf_conf:
return output
if str(self) in inf_conf.sections():
section = str(self)
output[section] = {k: v for k, v in inf_conf.items(section)
if gp_krb_ext.apply_map.get(k)}
return output
class gp_access_ext(gp_inf_ext):
"""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 load_ldb(self):
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')
apply_map = { 'MinimumPasswordAge': 'minPwdAge',
'MaximumPasswordAge': 'maxPwdAge',
'MinimumPasswordLength': 'minPwdLength',
'PasswordComplexity': 'pwdProperties' }
def process_group_policy(self, deleted_gpo_list, changed_gpo_list):
if self.lp.get('server role') != 'active directory domain controller':
return
self.load_ldb()
inf_file = 'MACHINE/Microsoft/Windows NT/SecEdit/GptTmpl.inf'
for guid, settings in deleted_gpo_list:
self.gp_db.set_guid(guid)
for section in settings.keys():
if section == str(self):
for att, value in settings[section].items():
update_samba, _ = self.mapper().get(att)
update_samba(att, value)
self.gp_db.delete(section, att)
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():
if section == str(self):
for key, value in inf_conf.items(section):
if key not in gp_access_ext.apply_map:
continue
att = gp_access_ext.apply_map[key]
(update_samba, value_func) = self.mapper().get(att)
update_samba(att, value_func(value))
self.gp_db.commit()
def ch_minPwdAge(self, attribute, val):
old_val = self.ldb.get_minPwdAge()
log.info('KDC Minimum Password age was changed from %s to %s'
% (old_val, val))
self.gp_db.store(str(self), attribute, str(old_val))
self.ldb.set_minPwdAge(val)
def ch_maxPwdAge(self, attribute, val):
old_val = self.ldb.get_maxPwdAge()
log.info('KDC Maximum Password age was changed from %s to %s'
% (old_val, val))
self.gp_db.store(str(self), attribute, str(old_val))
self.ldb.set_maxPwdAge(val)
def ch_minPwdLength(self, attribute, val):
old_val = self.ldb.get_minPwdLength()
log.info('KDC Minimum Password length was changed from %s to %s'
% (old_val, val))
self.gp_db.store(str(self), attribute, str(old_val))
self.ldb.set_minPwdLength(val)
def ch_pwdProperties(self, attribute, val):
old_val = self.ldb.get_pwdProperties()
log.info('KDC Password Properties were changed from %s to %s'
% (old_val, val))
self.gp_db.store(str(self), attribute, str(old_val))
self.ldb.set_pwdProperties(val)
def mapper(self):
"""ldap value : samba setter"""
return {"minPwdAge": (self.ch_minPwdAge, days2rel_nttime),
"maxPwdAge": (self.ch_maxPwdAge, days2rel_nttime),
# Could be none, but I like the method assignment in
# update_samba
"minPwdLength": (self.ch_minPwdLength, lambda val: val),
"pwdProperties": (self.ch_pwdProperties, lambda val: val),
}
def __str__(self):
return 'System Access'
def rsop(self, gpo):
output = {}
if self.lp.get('server role') != 'active directory domain controller':
return output
inf_file = 'MACHINE/Microsoft/Windows NT/SecEdit/GptTmpl.inf'
if gpo.file_sys_path:
path = os.path.join(gpo.file_sys_path, inf_file)
inf_conf = self.parse(path)
if not inf_conf:
return output
if str(self) in inf_conf.sections():
section = str(self)
output[section] = {k: v for k, v in inf_conf.items(section)
if gp_access_ext.apply_map.get(k)}
return output
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