diff options
Diffstat (limited to 'src/conf_mode/vpn_pptp.py')
| -rwxr-xr-x | src/conf_mode/vpn_pptp.py | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/src/conf_mode/vpn_pptp.py b/src/conf_mode/vpn_pptp.py new file mode 100755 index 000000000..085c9c2c6 --- /dev/null +++ b/src/conf_mode/vpn_pptp.py @@ -0,0 +1,279 @@ +#!/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 +import re + +from copy import deepcopy +from stat import S_IRUSR, S_IWUSR, S_IRGRP +from sys import exit + +from vyos.config import Config +from vyos.template import render +from vyos.util import call, get_half_cpus +from vyos import ConfigError + +pptp_conf = '/run/accel-pppd/pptp.conf' +pptp_chap_secrets = '/run/accel-pppd/pptp.chap-secrets' + +default_pptp = { + 'auth_mode' : 'local', + 'local_users' : [], + 'radius_server' : [], + 'radius_acct_tmo' : '30', + 'radius_max_try' : '3', + 'radius_timeout' : '30', + 'radius_nas_id' : '', + 'radius_nas_ip' : '', + 'radius_source_address' : '', + 'radius_shaper_attr' : '', + 'radius_shaper_vendor': '', + 'radius_dynamic_author' : '', + 'chap_secrets_file': pptp_chap_secrets, # used in Jinja2 template + 'outside_addr': '', + 'dnsv4': [], + 'wins': [], + 'client_ip_pool': '', + 'mtu': '1436', + 'auth_proto' : ['auth_mschap_v2'], + 'ppp_mppe' : 'prefer', + 'thread_cnt': get_half_cpus() +} + +def get_config(): + conf = Config() + base_path = ['vpn', 'pptp', 'remote-access'] + if not conf.exists(base_path): + return None + + pptp = deepcopy(default_pptp) + conf.set_level(base_path) + + if conf.exists(['name-server']): + pptp['dnsv4'] = conf.return_values(['name-server']) + + if conf.exists(['wins-server']): + pptp['wins'] = conf.return_values(['wins-server']) + + if conf.exists(['outside-address']): + pptp['outside_addr'] = conf.return_value(['outside-address']) + + if conf.exists(['authentication', 'mode']): + pptp['auth_mode'] = conf.return_value(['authentication', 'mode']) + + # + # local auth + if conf.exists(['authentication', 'local-users']): + for username in conf.list_nodes(['authentication', 'local-users', 'username']): + user = { + 'name': username, + 'password' : '', + 'state' : 'enabled', + 'ip' : '*', + } + + conf.set_level(base_path + ['authentication', 'local-users', 'username', username]) + + if conf.exists(['password']): + user['password'] = conf.return_value(['password']) + + if conf.exists(['disable']): + user['state'] = 'disable' + + if conf.exists(['static-ip']): + user['ip'] = conf.return_value(['static-ip']) + + if not conf.exists(['disable']): + pptp['local_users'].append(user) + + # + # RADIUS auth and settings + conf.set_level(base_path + ['authentication', 'radius']) + if conf.exists(['server']): + for server in conf.list_nodes(['server']): + radius = { + 'server' : server, + 'key' : '', + 'fail_time' : 0, + 'port' : '1812' + } + + conf.set_level(base_path + ['authentication', 'radius', 'server', server]) + + if conf.exists(['fail-time']): + radius['fail-time'] = conf.return_value(['fail-time']) + + if conf.exists(['port']): + radius['port'] = conf.return_value(['port']) + + if conf.exists(['key']): + radius['key'] = conf.return_value(['key']) + + if not conf.exists(['disable']): + pptp['radius_server'].append(radius) + + # + # advanced radius-setting + conf.set_level(base_path + ['authentication', 'radius']) + + if conf.exists(['acct-timeout']): + pptp['radius_acct_tmo'] = conf.return_value(['acct-timeout']) + + if conf.exists(['max-try']): + pptp['radius_max_try'] = conf.return_value(['max-try']) + + if conf.exists(['timeout']): + pptp['radius_timeout'] = conf.return_value(['timeout']) + + if conf.exists(['nas-identifier']): + pptp['radius_nas_id'] = conf.return_value(['nas-identifier']) + + if conf.exists(['nas-ip-address']): + pptp['radius_nas_ip'] = conf.return_value(['nas-ip-address']) + + if conf.exists(['source-address']): + pptp['radius_source_address'] = conf.return_value(['source-address']) + + # Dynamic Authorization Extensions (DOA)/Change Of Authentication (COA) + if conf.exists(['dae-server']): + dae = { + 'port' : '', + 'server' : '', + 'key' : '' + } + + if conf.exists(['dynamic-author', 'ip-address']): + dae['server'] = conf.return_value(['dynamic-author', 'ip-address']) + + if conf.exists(['dynamic-author', 'port']): + dae['port'] = conf.return_value(['dynamic-author', 'port']) + + if conf.exists(['dynamic-author', 'key']): + dae['key'] = conf.return_value(['dynamic-author', 'key']) + + pptp['radius_dynamic_author'] = dae + + if conf.exists(['rate-limit', 'enable']): + pptp['radius_shaper_attr'] = 'Filter-Id' + c_attr = ['rate-limit', 'enable', 'attribute'] + if conf.exists(c_attr): + pptp['radius_shaper_attr'] = conf.return_value(c_attr) + + c_vendor = ['rate-limit', 'enable', 'vendor'] + if conf.exists(c_vendor): + pptp['radius_shaper_vendor'] = conf.return_value(c_vendor) + + conf.set_level(base_path) + if conf.exists(['client-ip-pool']): + if conf.exists(['client-ip-pool', 'start']) and conf.exists(['client-ip-pool', 'stop']): + start = conf.return_value(['client-ip-pool', 'start']) + stop = conf.return_value(['client-ip-pool', 'stop']) + pptp['client_ip_pool'] = start + '-' + re.search('[0-9]+$', stop).group(0) + + if conf.exists(['mtu']): + pptp['mtu'] = conf.return_value(['mtu']) + + # gateway address + if conf.exists(['gateway-address']): + pptp['gw_ip'] = conf.return_value(['gateway-address']) + else: + # calculate gw-ip-address + if conf.exists(['client-ip-pool', 'start']): + # use start ip as gw-ip-address + pptp['gateway_address'] = conf.return_value(['client-ip-pool', 'start']) + + if conf.exists(['authentication', 'require']): + # clear default list content, now populate with actual CLI values + pptp['auth_proto'] = [] + auth_mods = { + 'pap': 'auth_pap', + 'chap': 'auth_chap_md5', + 'mschap': 'auth_mschap_v1', + 'mschap-v2': 'auth_mschap_v2' + } + + for proto in conf.return_values(['authentication', 'require']): + pptp['auth_proto'].append(auth_mods[proto]) + + if conf.exists(['authentication', 'mppe']): + pptp['ppp_mppe'] = conf.return_value(['authentication', 'mppe']) + + return pptp + + +def verify(pptp): + if not pptp: + return None + + if pptp['auth_mode'] == 'local': + if not pptp['local_users']: + raise ConfigError('PPTP local auth mode requires local users to be configured!') + + for user in pptp['local_users']: + username = user['name'] + if not user['password']: + raise ConfigError(f'Password required for local user "{username}"') + + elif pptp['auth_mode'] == 'radius': + if len(pptp['radius_server']) == 0: + raise ConfigError('RADIUS authentication requires at least one server') + + for radius in pptp['radius_server']: + if not radius['key']: + server = radius['server'] + raise ConfigError(f'Missing RADIUS secret key for server "{ server }"') + + if len(pptp['dnsv4']) > 2: + raise ConfigError('Not more then two IPv4 DNS name-servers can be configured') + + if len(pptp['wins']) > 2: + raise ConfigError('Not more then two IPv4 WINS name-servers can be configured') + + +def generate(pptp): + if not pptp: + return None + + render(pptp_conf, 'accel-ppp/pptp.config.tmpl', pptp, trim_blocks=True) + + if pptp['local_users']: + render(pptp_chap_secrets, 'accel-ppp/chap-secrets.tmpl', pptp, trim_blocks=True) + os.chmod(pptp_chap_secrets, S_IRUSR | S_IWUSR | S_IRGRP) + else: + if os.path.exists(pptp_chap_secrets): + os.unlink(pptp_chap_secrets) + + +def apply(pptp): + if not pptp: + call('systemctl stop accel-ppp@pptp.service') + for file in [pptp_conf, pptp_chap_secrets]: + if os.path.exists(file): + os.unlink(file) + + return None + + call('systemctl restart accel-ppp@pptp.service') + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) |