#!/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 sys import exit from vyos.config import Config from vyos.configdict import dict_merge from vyos.pki import wrap_certificate from vyos.pki import wrap_private_key from vyos.template import render from vyos.util import call from vyos.util import is_systemd_service_running from vyos.xml import defaults from vyos import ConfigError from crypt import crypt, mksalt, METHOD_SHA512 from time import sleep 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) if ocserv: ocserv['pki'] = conf.get_config_dict(['pki'], key_mangling=('-', '_'), get_first_key=True, no_tag_node_value_mangle=True) 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' not in ocserv: raise ConfigError('openconnect ssl required') if not ocserv['pki'] or 'certificate' not in ocserv['pki']: raise ConfigError('PKI not configured') ssl = ocserv['ssl'] if 'certificate' not in ssl: raise ConfigError('openconnect ssl certificate required') cert_name = ssl['certificate'] if cert_name not in ocserv['pki']['certificate']: raise ConfigError('Invalid openconnect ssl certificate') cert = ocserv['pki']['certificate'][cert_name] if 'certificate' not in cert: raise ConfigError('Missing certificate in PKI') if 'private' not in cert or 'key' not in cert['private']: raise ConfigError('Missing private key in PKI') if 'ca_certificate' in ssl: if 'ca' not in ocserv['pki']: raise ConfigError('PKI not configured') if ssl['ca_certificate'] not in ocserv['pki']['ca']: raise ConfigError('Invalid openconnect ssl CA certificate') # 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"]) if "ssl" in ocserv: cert_file_path = os.path.join(cfg_dir, 'cert.pem') cert_key_path = os.path.join(cfg_dir, 'cert.key') ca_cert_file_path = os.path.join(cfg_dir, 'ca.pem') if 'certificate' in ocserv['ssl']: cert_name = ocserv['ssl']['certificate'] pki_cert = ocserv['pki']['certificate'][cert_name] with open(cert_file_path, 'w') as f: f.write(wrap_certificate(pki_cert['certificate'])) if 'private' in pki_cert and 'key' in pki_cert['private']: with open(cert_key_path, 'w') as f: f.write(wrap_private_key(pki_cert['private']['key'])) if 'ca_certificate' in ocserv['ssl']: ca_name = ocserv['ssl']['ca_certificate'] pki_ca_cert = ocserv['pki']['ca'][ca_name] with open(ca_cert_file_path, 'w') as f: f.write(wrap_certificate(pki_ca_cert['certificate'])) # 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') counter = 0 while True: # exit early when service runs if is_systemd_service_running("ocserv.service"): break sleep(0.250) if counter > 5: raise ConfigError('openconnect failed to start, check the logs for details') break counter += 1 if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)