diff options
Diffstat (limited to 'src/conf_mode/interfaces-wireguard.py')
| -rwxr-xr-x | src/conf_mode/interfaces-wireguard.py | 433 |
1 files changed, 227 insertions, 206 deletions
diff --git a/src/conf_mode/interfaces-wireguard.py b/src/conf_mode/interfaces-wireguard.py index ff12a5172..8bf81c747 100755 --- a/src/conf_mode/interfaces-wireguard.py +++ b/src/conf_mode/interfaces-wireguard.py @@ -1,6 +1,6 @@ #!/usr/bin/env python3 # -# Copyright (C) 2018 VyOS maintainers and contributors +# 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 @@ -13,263 +13,284 @@ # # 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 sys import os import re -import subprocess + +from sys import exit from copy import deepcopy from netifaces import interfaces -from vyos import ConfigError from vyos.config import Config from vyos.configdict import list_diff from vyos.ifconfig import WireGuardIf +from vyos.util import chown, is_bridge_member, chmod_750 +from vyos.util import call +from vyos import ConfigError kdir = r'/config/auth/wireguard' +default_config_data = { + 'intfc': '', + 'address': [], + 'address_remove': [], + 'description': '', + 'lport': None, + 'deleted': False, + 'disable': False, + 'fwmark': 0x00, + 'mtu': 1420, + 'peer': [], + 'peer_remove': [], # stores public keys of peers to remove + 'pk': f'{kdir}/default/private.key', + 'vrf': '' +} def _check_kmod(): - if not os.path.exists('/sys/module/wireguard'): - if os.system('sudo modprobe wireguard') != 0: - raise ConfigError("modprobe wireguard failed") + modules = ['wireguard'] + for module in modules: + if not os.path.exists(f'/sys/module/{module}'): + if call(f'modprobe {module}') != 0: + raise ConfigError(f'Loading Kernel module {module} failed') def _migrate_default_keys(): - if os.path.exists('{}/private.key'.format(kdir)) and not os.path.exists('{}/default/private.key'.format(kdir)): - old_umask = os.umask(0o027) - location = '{}/default'.format(kdir) - subprocess.call(['sudo mkdir -p ' + location], shell=True) - subprocess.call(['sudo chgrp vyattacfg ' + location], shell=True) - subprocess.call(['sudo chmod 750 ' + location], shell=True) - os.rename('{}/private.key'.format(kdir), - '{}/private.key'.format(location)) - os.rename('{}/public.key'.format(kdir), - '{}/public.key'.format(location)) - os.umask(old_umask) + if os.path.exists(f'{kdir}/private.key') and not os.path.exists(f'{kdir}/default/private.key'): + location = f'{kdir}/default' + if not os.path.exists(location): + os.makedirs(location) + + chown(location, 'root', 'vyattacfg') + chmod_750(location) + os.rename(f'{kdir}/private.key', f'{location}/private.key') + os.rename(f'{kdir}/public.key', f'{location}/public.key') def get_config(): - c = Config() - if not c.exists(['interfaces', 'wireguard']): - return None + conf = Config() + base = ['interfaces', 'wireguard'] + + # determine tagNode instance + if 'VYOS_TAGNODE_VALUE' not in os.environ: + raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified') + + wg = deepcopy(default_config_data) + wg['intf'] = os.environ['VYOS_TAGNODE_VALUE'] + + # Check if interface has been removed + if not conf.exists(base + [wg['intf']]): + wg['deleted'] = True + return wg + + conf.set_level(base + [wg['intf']]) + + # retrieve configured interface addresses + if conf.exists(['address']): + wg['address'] = conf.return_values(['address']) + + # get interface addresses (currently effective) - to determine which + # address is no longer valid and needs to be removed + eff_addr = conf.return_effective_values(['address']) + wg['address_remove'] = list_diff(eff_addr, wg['address']) + + # retrieve interface description + if conf.exists(['description']): + wg['description'] = conf.return_value(['description']) + + # disable interface + if conf.exists(['disable']): + wg['disable'] = True + + # local port to listen on + if conf.exists(['port']): + wg['lport'] = conf.return_value(['port']) + + # fwmark value + if conf.exists(['fwmark']): + wg['fwmark'] = int(conf.return_value(['fwmark'])) + + # Maximum Transmission Unit (MTU) + if conf.exists('mtu'): + wg['mtu'] = int(conf.return_value(['mtu'])) + + # retrieve VRF instance + if conf.exists('vrf'): + wg['vrf'] = conf.return_value('vrf') + + # private key + if conf.exists(['private-key']): + wg['pk'] = "{0}/{1}/private.key".format( + kdir, conf.return_value(['private-key'])) + + # peer removal, wg identifies peers by its pubkey + peer_eff = conf.list_effective_nodes(['peer']) + peer_rem = list_diff(peer_eff, conf.list_nodes(['peer'])) + for peer in peer_rem: + wg['peer_remove'].append( + conf.return_effective_value(['peer', peer, 'pubkey'])) + + # peer settings + if conf.exists(['peer']): + for p in conf.list_nodes(['peer']): + # set new config level for this peer + conf.set_level(base + [wg['intf'], 'peer', p]) + peer = { + 'allowed-ips': [], + 'address': '', + 'name': p, + 'persistent_keepalive': '', + 'port': '', + 'psk': '', + 'pubkey': '' + } + + # peer allowed-ips + if conf.exists(['allowed-ips']): + peer['allowed-ips'] = conf.return_values(['allowed-ips']) + + # peer address + if conf.exists(['address']): + peer['address'] = conf.return_value(['address']) + + # peer port + if conf.exists(['port']): + peer['port'] = conf.return_value(['port']) + + # persistent-keepalive + if conf.exists(['persistent-keepalive']): + peer['persistent_keepalive'] = conf.return_value(['persistent-keepalive']) + + # preshared-key + if conf.exists(['preshared-key']): + peer['psk'] = conf.return_value(['preshared-key']) + + # peer pubkeys + if conf.exists(['pubkey']): + key_eff = conf.return_effective_value(['pubkey']) + key_cfg = conf.return_value(['pubkey']) + peer['pubkey'] = key_cfg + + # on a pubkey change we need to remove the pubkey first + # peers are identified by pubkey, so key update means + # peer removal and re-add + if key_eff != key_cfg and key_eff != None: + wg['peer_remove'].append(key_cfg) + + # if a peer is disabled, we have to exec a remove for it's pubkey + if conf.exists(['disable']): + wg['peer_remove'].append(peer['pubkey']) + else: + wg['peer'].append(peer) - dflt_cnf = { - 'intfc': '', - 'addr': [], - 'addr_remove': [], - 'descr': '', - 'lport': None, - 'delete': False, - 'state': 'up', - 'fwmark': 0x00, - 'mtu': 1420, - 'peer': {}, - 'peer_remove': [], - 'pk': '{}/default/private.key'.format(kdir) - } - - if os.getenv('VYOS_TAGNODE_VALUE'): - ifname = str(os.environ['VYOS_TAGNODE_VALUE']) - wg = deepcopy(dflt_cnf) - wg['intfc'] = ifname - wg['descr'] = ifname - else: - print("ERROR: VYOS_TAGNODE_VALUE undefined") - sys.exit(1) - - c.set_level(['interfaces', 'wireguard']) - - # interface removal state - if not c.exists(ifname) and c.exists_effective(ifname): - wg['delete'] = True - - if not wg['delete']: - c.set_level(['interfaces', 'wireguard', ifname]) - if c.exists(['address']): - wg['addr'] = c.return_values(['address']) - - # determine addresses which need to be removed - eff_addr = c.return_effective_values(['address']) - wg['addr_remove'] = list_diff(eff_addr, wg['addr']) - - # ifalias description - if c.exists(['description']): - wg['descr'] = c.return_value(['description']) - - # link state - if c.exists(['disable']): - wg['state'] = 'down' - - # local port to listen on - if c.exists(['port']): - wg['lport'] = c.return_value(['port']) - - # fwmark value - if c.exists(['fwmark']): - wg['fwmark'] = c.return_value(['fwmark']) - - # mtu - if c.exists('mtu'): - wg['mtu'] = c.return_value('mtu') - - # private key - if c.exists(['private-key']): - wg['pk'] = "{0}/{1}/private.key".format( - kdir, c.return_value(['private-key'])) - - # peer removal, wg identifies peers by its pubkey - peer_eff = c.list_effective_nodes(['peer']) - peer_rem = list_diff(peer_eff, c.list_nodes(['peer'])) - for p in peer_rem: - wg['peer_remove'].append( - c.return_effective_value(['peer', p, 'pubkey'])) - - # peer settings - if c.exists(['peer']): - for p in c.list_nodes(['peer']): - if not c.exists(['peer', p, 'disable']): - wg['peer'].update( - { - p: { - 'allowed-ips': [], - 'endpoint': '', - 'pubkey': '' - } - } - ) - # peer allowed-ips - if c.exists(['peer', p, 'allowed-ips']): - wg['peer'][p]['allowed-ips'] = c.return_values( - ['peer', p, 'allowed-ips']) - # peer endpoint - if c.exists(['peer', p, 'endpoint']): - wg['peer'][p]['endpoint'] = c.return_value( - ['peer', p, 'endpoint']) - # persistent-keepalive - if c.exists(['peer', p, 'persistent-keepalive']): - wg['peer'][p]['persistent-keepalive'] = c.return_value( - ['peer', p, 'persistent-keepalive']) - # preshared-key - if c.exists(['peer', p, 'preshared-key']): - wg['peer'][p]['psk'] = c.return_value( - ['peer', p, 'preshared-key']) - # peer pubkeys - key_eff = c.return_effective_value(['peer', p, 'pubkey']) - key_cfg = c.return_value(['peer', p, 'pubkey']) - wg['peer'][p]['pubkey'] = key_cfg - - # on a pubkey change we need to remove the pubkey first - # peers are identified by pubkey, so key update means - # peer removal and re-add - if key_eff != key_cfg and key_eff != None: - wg['peer_remove'].append(key_cfg) - - # if a peer is disabled, we have to exec a remove for it's pubkey - else: - peer_key = c.return_value(['peer', p, 'pubkey']) - wg['peer_remove'].append(peer_key) return wg -def verify(c): - if not c: - return None +def verify(wg): + interface = wg['intf'] - if not os.path.exists(c['pk']): - raise ConfigError( - "No keys found, generate them by executing: \'run generate wireguard [keypair|named-keypairs]\'") - - if not c['delete']: - if not c['addr']: - raise ConfigError("ERROR: IP address required") - if not c['peer']: - raise ConfigError("ERROR: peer required") - for p in c['peer']: - if not c['peer'][p]['allowed-ips']: - raise ConfigError("ERROR: allowed-ips required for peer " + p) - if not c['peer'][p]['pubkey']: - raise ConfigError("peer pubkey required for peer " + p) - - -def apply(c): - # no wg configs left, remove all interface from system - # maybe move it into ifconfig.py - if not c: - net_devs = os.listdir('/sys/class/net/') - for dev in net_devs: - if os.path.isdir('/sys/class/net/' + dev): - buf = open('/sys/class/net/' + dev + '/uevent', 'r').read() - if re.search("DEVTYPE=wireguard", buf, re.I | re.M): - wg_intf = re.sub("INTERFACE=", "", re.search( - "INTERFACE=.*", buf, re.I | re.M).group(0)) - subprocess.call( - ['ip l d dev ' + wg_intf + ' >/dev/null'], shell=True) + if wg['deleted']: + is_member, bridge = is_bridge_member(interface) + if is_member: + # can not use a f'' formatted-string here as bridge would not get + # expanded in the print statement + raise ConfigError('Can not delete interface "{0}" as it ' \ + 'is a member of bridge "{1}"!'.format(interface, bridge)) return None + vrf_name = wg['vrf'] + if vrf_name and vrf_name not in interfaces(): + raise ConfigError(f'VRF "{vrf_name}" does not exist') + + if not os.path.exists(wg['pk']): + raise ConfigError('No keys found, generate them by executing:\n' \ + '"run generate wireguard [keypair|named-keypairs]"') + + if not wg['address']: + raise ConfigError(f'IP address required for interface "{interface}"!') + + if not wg['peer']: + raise ConfigError(f'Peer required for interface "{interface}"!') + + # run checks on individual configured WireGuard peer + for peer in wg['peer']: + peer_name = peer['name'] + if not peer['allowed-ips']: + raise ConfigError(f'Peer allowed-ips required for peer "{peer_name}"!') + + if not peer['pubkey']: + raise ConfigError(f'Peer public-key required for peer "{peer_name}"!') + + +def apply(wg): # init wg class - intfc = WireGuardIf(c['intfc']) + w = WireGuardIf(wg['intf']) # single interface removal - if c['delete']: - intfc.remove() + if wg['deleted']: + w.remove() return None - # remove IP addresses - for ip in c['addr_remove']: - intfc.del_addr(ip) + # Configure interface address(es) + # - not longer required addresses get removed first + # - newly addresses will be added second + for addr in wg['address_remove']: + w.del_addr(addr) + for addr in wg['address']: + w.add_addr(addr) - # add IP addresses - for ip in c['addr']: - intfc.add_addr(ip) + # Maximum Transmission Unit (MTU) + w.set_mtu(wg['mtu']) - # interface mtu - intfc.set_mtu(int(c['mtu'])) + # update interface description used e.g. within SNMP + w.set_alias(wg['description']) - # ifalias for snmp from description - intfc.set_alias(str(c['descr'])) + # assign/remove VRF + w.set_vrf(wg['vrf']) # remove peers - if c['peer_remove']: - for pkey in c['peer_remove']: - intfc.remove_peer(pkey) + for pub_key in wg['peer_remove']: + w.remove_peer(pub_key) # peer pubkey # setting up the wg interface - intfc.config['private-key'] = c['pk'] - for p in c['peer']: + w.config['private-key'] = c['pk'] + + for peer in wg['peer']: # peer pubkey - intfc.config['pubkey'] = str(c['peer'][p]['pubkey']) + w.config['pubkey'] = peer['pubkey'] # peer allowed-ips - intfc.config['allowed-ips'] = c['peer'][p]['allowed-ips'] + w.config['allowed-ips'] = peer['allowed-ips'] # local listen port - if c['lport']: - intfc.config['port'] = c['lport'] + if wg['lport']: + w.config['port'] = wg['lport'] # fwmark if c['fwmark']: - intfc.config['fwmark'] = c['fwmark'] + w.config['fwmark'] = wg['fwmark'] + # endpoint - if c['peer'][p]['endpoint']: - intfc.config['endpoint'] = c['peer'][p]['endpoint'] + if peer['address'] and peer['port']: + w.config['endpoint'] = '{}:{}'.format( + peer['address'], peer['port']) # persistent-keepalive - if 'persistent-keepalive' in c['peer'][p]: - intfc.config['keepalive'] = c['peer'][p]['persistent-keepalive'] + if peer['persistent_keepalive']: + w.config['keepalive'] = peer['persistent_keepalive'] # maybe move it into ifconfig.py # preshared-key - needs to be read from a file - if 'psk' in c['peer'][p]: + if peer['psk']: psk_file = '/config/auth/wireguard/psk' - old_umask = os.umask(0o077) - open(psk_file, 'w').write(str(c['peer'][p]['psk'])) - os.umask(old_umask) - intfc.config['psk'] = psk_file - intfc.update() + with open(psk_file, 'w') as f: + f.write(peer['psk']) + w.config['psk'] = psk_file - # interface state - intfc.set_state(c['state']) + w.update() + + # Enable/Disable interface + if wg['disable']: + w.set_admin_state('down') + else: + w.set_admin_state('up') return None @@ -282,4 +303,4 @@ if __name__ == '__main__': apply(c) except ConfigError as e: print(e) - sys.exit(1) + exit(1) |