#!/usr/bin/env python3 # # Copyright (C) 2018-2020 VyOS maintainers and contributors # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 or later as # published by the Free Software Foundation. # # 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 netifaces import interfaces from sys import exit from vyos.config import Config from vyos.configdict import dict_merge from vyos import ConfigError from vyos.util import call from vyos.template import render from vyos.xml import defaults from vyos import airbag airbag.enable() config_file = r'/etc/ssh/sshd_config' systemd_override = r'/etc/systemd/system/ssh.service.d/override.conf' def get_config(): conf = Config() base = ['service', 'ssh'] if not conf.exists(base): return None ssh = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True) # We have gathered the dict representation of the CLI, but there are default # options which we need to update into the dictionary retrived. default_values = defaults(base) ssh = dict_merge(default_values, ssh) return ssh def verify(ssh): if not ssh: return None if 'vrf' in ssh.keys() and ssh['vrf'] not in interfaces(): raise ConfigError('VRF "{vrf}" does not exist'.format(**ssh)) return None def generate(ssh): if not ssh: if os.path.isfile(config_file): os.unlink(config_file) if os.path.isfile(systemd_override): os.unlink(systemd_override) return None render(config_file, 'ssh/sshd_config.tmpl', ssh, trim_blocks=True) render(systemd_override, 'ssh/override.conf.tmpl', ssh, trim_blocks=True) return None def apply(ssh): if not ssh: # SSH access is removed in the commit call('systemctl stop ssh.service') # Reload systemd manager configuration call('systemctl daemon-reload') if ssh: call('systemctl restart ssh.service') return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)