Current File : //lib/python3/dist-packages/samba/gp/gp_centrify_crontab_ext.py
# gp_centrify_crontab_ext samba gpo policy
# Copyright (C) David Mulder <dmulder@suse.com> 2022
#
# 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, re
from subprocess import Popen, PIPE
from samba.gp.gpclass import gp_pol_ext, drop_privileges, gp_file_applier
from hashlib import blake2b
from tempfile import NamedTemporaryFile
intro = '''
### autogenerated by samba
#
# This file is generated by the gp_centrify_crontab_ext Group Policy
# Client Side Extension. To modify the contents of this file,
# modify the appropriate Group Policy objects which apply
# to this machine. DO NOT MODIFY THIS FILE DIRECTLY.
#
'''
end = '''
### autogenerated by samba ###
'''
class gp_centrify_crontab_ext(gp_pol_ext, gp_file_applier):
def __str__(self):
return 'Centrify/CrontabEntries'
def process_group_policy(self, deleted_gpo_list, changed_gpo_list,
cdir=None):
for guid, settings in deleted_gpo_list:
if str(self) in settings:
for attribute, script in settings[str(self)].items():
self.unapply(guid, attribute, script)
for gpo in changed_gpo_list:
if gpo.file_sys_path:
section = \
'Software\\Policies\\Centrify\\UnixSettings\\CrontabEntries'
pol_file = 'MACHINE/Registry.pol'
path = os.path.join(gpo.file_sys_path, pol_file)
pol_conf = self.parse(path)
if not pol_conf:
continue
entries = []
for e in pol_conf.entries:
if e.keyname == section and e.data.strip():
entries.append(e.data)
def applier_func(entries):
cron_dir = '/etc/cron.d' if not cdir else cdir
with NamedTemporaryFile(prefix='gp_', mode="w+",
delete=False, dir=cron_dir) as f:
contents = intro
for entry in entries:
contents += '%s\n' % entry
contents += end
f.write(contents)
return [f.name]
attribute = self.generate_attribute(gpo.name)
value_hash = self.generate_value_hash(*entries)
self.apply(gpo.name, attribute, value_hash, applier_func,
entries)
# Remove scripts for this GPO which are no longer applied
self.clean(gpo.name, keep=attribute)
def rsop(self, gpo, target='MACHINE'):
output = {}
section = 'Software\\Policies\\Centrify\\UnixSettings\\CrontabEntries'
pol_file = '%s/Registry.pol' % target
if gpo.file_sys_path:
path = os.path.join(gpo.file_sys_path, pol_file)
pol_conf = self.parse(path)
if not pol_conf:
return output
for e in pol_conf.entries:
if e.keyname == section and e.data.strip():
if str(self) not in output.keys():
output[str(self)] = []
output[str(self)].append(e.data)
return output
def fetch_crontab(username):
p = Popen(['crontab', '-l', '-u', username], stdout=PIPE, stderr=PIPE)
out, err = p.communicate()
if p.returncode != 0:
raise RuntimeError('Failed to read the crontab: %s' % err)
m = re.findall('%s(.*)%s' % (intro, end), out.decode(), re.DOTALL)
if len(m) == 1:
entries = m[0].strip().split('\n')
else:
entries = []
m = re.findall('(.*)%s.*%s(.*)' % (intro, end), out.decode(), re.DOTALL)
if len(m) == 1:
others = '\n'.join([l.strip() for l in m[0]])
else:
others = out.decode()
return others, entries
def install_crontab(fname, username):
p = Popen(['crontab', fname, '-u', username], stdout=PIPE, stderr=PIPE)
_, err = p.communicate()
if p.returncode != 0:
raise RuntimeError('Failed to install crontab: %s' % err)
class gp_user_centrify_crontab_ext(gp_centrify_crontab_ext):
def process_group_policy(self, deleted_gpo_list, changed_gpo_list):
for guid, settings in deleted_gpo_list:
self.gp_db.set_guid(guid)
if str(self) in settings:
others, entries = fetch_crontab(self.username)
for attribute, entry in settings[str(self)].items():
if entry in entries:
entries.remove(entry)
self.gp_db.delete(str(self), attribute)
with NamedTemporaryFile() as f:
if len(entries) > 0:
f.write('\n'.join([others, intro,
'\n'.join(entries), end]).encode())
else:
f.write(others.encode())
f.flush()
install_crontab(f.name, self.username)
self.gp_db.commit()
for gpo in changed_gpo_list:
if gpo.file_sys_path:
section = \
'Software\\Policies\\Centrify\\UnixSettings\\CrontabEntries'
self.gp_db.set_guid(gpo.name)
pol_file = 'USER/Registry.pol'
path = os.path.join(gpo.file_sys_path, pol_file)
pol_conf = drop_privileges('root', self.parse, path)
if not pol_conf:
continue
for e in pol_conf.entries:
if e.keyname == section and e.data.strip():
attribute = blake2b(e.data.encode()).hexdigest()
old_val = self.gp_db.retrieve(str(self), attribute)
others, entries = fetch_crontab(self.username)
if not old_val or e.data not in entries:
entries.append(e.data)
with NamedTemporaryFile() as f:
f.write('\n'.join([others, intro,
'\n'.join(entries), end]).encode())
f.flush()
install_crontab(f.name, self.username)
self.gp_db.store(str(self), attribute, e.data)
self.gp_db.commit()
def rsop(self, gpo):
return super().rsop(gpo, target='USER')
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