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# gp_sudoers_ext samba gpo policy
# Copyright (C) David Mulder <dmulder@suse.com> 2020
#
# 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
from samba.gp.gpclass import gp_pol_ext, gp_file_applier
from tempfile import NamedTemporaryFile
from subprocess import Popen, PIPE
from samba.gp.util.logging import log
def find_executable(executable, path):
paths = path.split(os.pathsep)
for p in paths:
f = os.path.join(p, executable)
if os.path.isfile(f):
return f
return None
intro = '''
### autogenerated by samba
#
# This file is generated by the gp_sudoers_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.
#
'''
visudo = find_executable('visudo',
path='%s:%s' % (os.environ['PATH'], '/usr/sbin'))
def sudo_applier_func(sudo_dir, sudo_entries):
ret = []
for p in sudo_entries:
contents = intro
contents += '%s\n' % p
with NamedTemporaryFile() as f:
with open(f.name, 'w') as w:
w.write(contents)
if visudo is None:
raise FileNotFoundError('visudo not found, please install it')
with Popen([visudo, '-c', '-f', f.name],
stdout=PIPE, stderr=PIPE) as proc:
sudo_validation = proc.wait()
if sudo_validation == 0:
with NamedTemporaryFile(prefix='gp_',
delete=False,
dir=sudo_dir) as f:
with open(f.name, 'w') as w:
w.write(contents)
ret.append(f.name)
else:
log.error('Sudoers apply failed', p)
return ret
class gp_sudoers_ext(gp_pol_ext, gp_file_applier):
def __str__(self):
return 'Unix Settings/Sudo Rights'
def process_group_policy(self, deleted_gpo_list, changed_gpo_list,
sdir='/etc/sudoers.d'):
for guid, settings in deleted_gpo_list:
if str(self) in settings:
for attribute, sudoers in settings[str(self)].items():
self.unapply(guid, attribute, sudoers)
for gpo in changed_gpo_list:
if gpo.file_sys_path:
section = 'Software\\Policies\\Samba\\Unix Settings\\Sudo Rights'
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
sudo_entries = []
for e in pol_conf.entries:
if e.keyname == section and e.data.strip():
sudo_entries.append(e.data)
# Each GPO applies only one set of sudoers, in a
# set of files, so the attribute does not need uniqueness.
attribute = self.generate_attribute(gpo.name)
# The value hash is generated from the sudo_entries, ensuring
# any changes to this GPO will cause the files to be rewritten.
value_hash = self.generate_value_hash(*sudo_entries)
self.apply(gpo.name, attribute, value_hash, sudo_applier_func,
sdir, sudo_entries)
# Cleanup any old entries that are no longer part of the policy
self.clean(gpo.name, keep=[attribute])
def rsop(self, gpo):
output = {}
pol_file = 'MACHINE/Registry.pol'
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:
key = e.keyname.split('\\')[-1]
if key.endswith('Sudo Rights') and e.data.strip():
if key not in output.keys():
output[key] = []
output[key].append(e.data)
return output
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