JezK
Edit File: gp_sec_ext.py
# 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): 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): 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