#!/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 . import os from sys import exit from vyos.config import Config from vyos.configdict import dict_merge from vyos.xml import defaults from vyos.template import render from vyos.util import call from vyos import ConfigError from crypt import crypt, mksalt, METHOD_SHA512 from vyos import airbag airbag.enable() cfg_dir = '/run/ocserv' ocserv_conf = cfg_dir + '/ocserv.conf' ocserv_passwd = cfg_dir + '/ocpasswd' radius_cfg = cfg_dir + '/radiusclient.conf' radius_servers = cfg_dir + '/radius_servers' # Generate hash from user cleartext password def get_hash(password): return crypt(password, mksalt(METHOD_SHA512)) def get_config(): conf = Config() base = ['vpn', 'openconnect'] if not conf.exists(base): return None ocserv = 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) ocserv = dict_merge(default_values, ocserv) return ocserv def verify(ocserv): if ocserv is None: return None # Check authentication if "authentication" in ocserv: if "mode" in ocserv["authentication"]: if "local" in ocserv["authentication"]["mode"]: if not ocserv["authentication"]["local_users"] or not ocserv["authentication"]["local_users"]["username"]: raise ConfigError('openconnect mode local required at leat one user') else: for user in ocserv["authentication"]["local_users"]["username"]: if not "password" in ocserv["authentication"]["local_users"]["username"][user]: raise ConfigError(f'password required for user {user}') else: raise ConfigError('openconnect authentication mode required') else: raise ConfigError('openconnect authentication credentials required') # Check ssl if "ssl" in ocserv: req_cert = ['ca_cert_file', 'cert_file', 'key_file'] for cert in req_cert: if not cert in ocserv["ssl"]: raise ConfigError('openconnect ssl {0} required'.format(cert.replace('_', '-'))) else: raise ConfigError('openconnect ssl required') # Check network settings if "network_settings" in ocserv: if "push_route" in ocserv["network_settings"]: # Replace default route if "0.0.0.0/0" in ocserv["network_settings"]["push_route"]: ocserv["network_settings"]["push_route"].remove("0.0.0.0/0") ocserv["network_settings"]["push_route"].append("default") else: ocserv["network_settings"]["push_route"] = "default" else: raise ConfigError('openconnect network settings required') def generate(ocserv): if not ocserv: return None if "radius" in ocserv["authentication"]["mode"]: # Render radius client configuration render(radius_cfg, 'ocserv/radius_conf.tmpl', ocserv["authentication"]["radius"]) # Render radius servers render(radius_servers, 'ocserv/radius_servers.tmpl', ocserv["authentication"]["radius"]) else: if "local_users" in ocserv["authentication"]: for user in ocserv["authentication"]["local_users"]["username"]: ocserv["authentication"]["local_users"]["username"][user]["hash"] = get_hash(ocserv["authentication"]["local_users"]["username"][user]["password"]) # Render local users render(ocserv_passwd, 'ocserv/ocserv_passwd.tmpl', ocserv["authentication"]["local_users"]) # Render config render(ocserv_conf, 'ocserv/ocserv_config.tmpl', ocserv) def apply(ocserv): if not ocserv: call('systemctl stop ocserv.service') for file in [ocserv_conf, ocserv_passwd]: if os.path.exists(file): os.unlink(file) else: call('systemctl restart ocserv.service') if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)