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The sshd_config man page says that key value pairs 'the first obtained value will be used'. So we need to sort policies from last to first. Signed-off-by: David Mulder <dmulder@samba.org> Reviewed-by: Andrew Bartlett <abartlet@samba.org> Autobuild-User(master): Andrew Bartlett <abartlet@samba.org> Autobuild-Date(master): Fri May 19 01:23:19 UTC 2023 on atb-devel-224
116 lines
5.1 KiB
Python
116 lines
5.1 KiB
Python
# vgp_openssh_ext samba group policy
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# Copyright (C) David Mulder <dmulder@suse.com> 2020
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import os
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from io import BytesIO
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from samba.gp.gpclass import gp_xml_ext, gp_file_applier
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from tempfile import NamedTemporaryFile
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from samba.common import get_bytes, get_string
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intro = b'''
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### autogenerated by samba
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#
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# This file is generated by the vgp_openssh_ext Group Policy
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# Client Side Extension. To modify the contents of this file,
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# modify the appropriate Group Policy objects which apply
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# to this machine. DO NOT MODIFY THIS FILE DIRECTLY.
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#
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'''
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# For each key value pair in sshd_config, the first obtained value will be
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# used. We must insert config files in reverse, so that the last applied policy
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# takes precedence.
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def select_next_conf(directory):
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configs = [re.match(r'(\d+)', f) for f in os.listdir(directory)]
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conf_ids = [int(m.group(1)) for m in configs if m]
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conf_ids.append(9000000000) # The starting node
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conf_id = min(conf_ids)-1
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return os.path.join(directory, '%010d_gp.conf' % conf_id)
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class vgp_openssh_ext(gp_xml_ext, gp_file_applier):
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def __str__(self):
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return 'VGP/Unix Settings/OpenSSH'
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def process_group_policy(self, deleted_gpo_list, changed_gpo_list,
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cfg_dir='/etc/ssh/sshd_config.d'):
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for guid, settings in deleted_gpo_list:
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if str(self) in settings:
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for attribute, sshd_config in settings[str(self)].items():
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self.unapply(guid, attribute, sshd_config)
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for gpo in changed_gpo_list:
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if gpo.file_sys_path:
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xml = 'MACHINE/VGP/VTLA/SshCfg/SshD/manifest.xml'
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path = os.path.join(gpo.file_sys_path, xml)
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xml_conf = self.parse(path)
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if not xml_conf:
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continue
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policy = xml_conf.find('policysetting')
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data = policy.find('data')
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configfile = data.find('configfile')
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for configsection in configfile.findall('configsection'):
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if configsection.find('sectionname').text:
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continue
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settings = {}
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for kv in configsection.findall('keyvaluepair'):
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settings[kv.find('key')] = kv.find('value')
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raw = BytesIO()
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for k, v in settings.items():
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raw.write(b'%s %s\n' % \
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(get_bytes(k.text), get_bytes(v.text)))
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# Each GPO applies only one set of OpenSSH settings, in a
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# single file, so the attribute does not need uniqueness.
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attribute = self.generate_attribute(gpo.name)
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# The value hash is generated from the raw data we will
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# write to the OpenSSH settings file, ensuring any changes
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# to this GPO will cause the file to be rewritten.
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value_hash = self.generate_value_hash(raw.getvalue())
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if not os.path.isdir(cfg_dir):
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os.mkdir(cfg_dir, 0o640)
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def applier_func(cfg_dir, raw):
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filename = select_next_conf(cfg_dir)
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f = open(filename, 'wb')
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f.write(intro)
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f.write(raw.getvalue())
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os.chmod(filename, 0o640)
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f.close()
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return [filename]
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self.apply(gpo.name, attribute, value_hash, applier_func,
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cfg_dir, raw)
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raw.close()
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def rsop(self, gpo):
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output = {}
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if gpo.file_sys_path:
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xml = 'MACHINE/VGP/VTLA/SshCfg/SshD/manifest.xml'
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path = os.path.join(gpo.file_sys_path, xml)
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xml_conf = self.parse(path)
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if not xml_conf:
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return output
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policy = xml_conf.find('policysetting')
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data = policy.find('data')
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configfile = data.find('configfile')
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for configsection in configfile.findall('configsection'):
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if configsection.find('sectionname').text:
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continue
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for kv in configsection.findall('keyvaluepair'):
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if str(self) not in output.keys():
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output[str(self)] = {}
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output[str(self)][kv.find('key').text] = \
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kv.find('value').text
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return output
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