1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
#!/usr/bin/env python3
#
# Copyright (C) 2018 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 sys
import os
import re
import syslog as sl
import subprocess
from vyos.config import Config
from vyos import ConfigError
from vyos.ifconfig import WireGuardIf
ifname = str(os.environ['VYOS_TAGNODE_VALUE'])
intfc = WireGuardIf(ifname)
kdir = r'/config/auth/wireguard'
def check_kmod():
if not os.path.exists('/sys/module/wireguard'):
sl.syslog(sl.LOG_NOTICE, "loading wirguard kmod")
if os.system('sudo modprobe wireguard') != 0:
sl.syslog(sl.LOG_NOTICE, "modprobe wireguard failed")
raise ConfigError("modprobe wireguard failed")
def get_config():
c = Config()
if not c.exists('interfaces wireguard'):
return None
config_data = {
ifname: {
'addr': '',
'descr': ifname,
'lport': None,
'status': 'exists',
'state': 'enabled',
'fwmark': 0x00,
'mtu': 1420,
'peer': {},
'pk' : '{}/default/private.key'.format(kdir)
}
}
c.set_level('interfaces wireguard')
if not c.exists_effective(ifname):
config_data[ifname]['status'] = 'create'
if not c.exists(ifname) and c.exists_effective(ifname):
config_data[ifname]['status'] = 'delete'
if config_data[ifname]['status'] != 'delete':
if c.exists(ifname + ' address'):
config_data[ifname]['addr'] = c.return_values(ifname + ' address')
if c.exists(ifname + ' disable'):
config_data[ifname]['state'] = 'disable'
if c.exists(ifname + ' port'):
config_data[ifname]['lport'] = c.return_value(ifname + ' port')
if c.exists(ifname + ' fwmark'):
config_data[ifname]['fwmark'] = c.return_value(ifname + ' fwmark')
if c.exists(ifname + ' description'):
config_data[ifname]['descr'] = c.return_value(
ifname + ' description')
if c.exists(ifname + ' mtu'):
config_data[ifname]['mtu'] = c.return_value(ifname + ' mtu')
if c.exists(ifname + ' private-key'):
config_data[ifname]['pk'] = "{0}/{1}/private.key".format(kdir,c.return_value(ifname + ' private-key'))
if c.exists(ifname + ' peer'):
for p in c.list_nodes(ifname + ' peer'):
if not c.exists(ifname + ' peer ' + p + ' disable'):
config_data[ifname]['peer'].update(
{
p: {
'allowed-ips': [],
'endpoint': '',
'pubkey': ''
}
}
)
if c.exists(ifname + ' peer ' + p + ' pubkey'):
config_data[ifname]['peer'][p]['pubkey'] = c.return_value(
ifname + ' peer ' + p + ' pubkey')
if c.exists(ifname + ' peer ' + p + ' allowed-ips'):
config_data[ifname]['peer'][p]['allowed-ips'] = c.return_values(
ifname + ' peer ' + p + ' allowed-ips')
if c.exists(ifname + ' peer ' + p + ' endpoint'):
config_data[ifname]['peer'][p]['endpoint'] = c.return_value(
ifname + ' peer ' + p + ' endpoint')
if c.exists(ifname + ' peer ' + p + ' persistent-keepalive'):
config_data[ifname]['peer'][p]['persistent-keepalive'] = c.return_value(
ifname + ' peer ' + p + ' persistent-keepalive')
if c.exists(ifname + ' peer ' + p + ' preshared-key'):
config_data[ifname]['peer'][p]['psk'] = c.return_value(
ifname + ' peer ' + p + ' preshared-key')
return config_data
def verify(c):
if not c:
return None
if not os.path.exists(c[ifname]['pk']):
raise ConfigError(
"No keys found, generate them by executing: \'run generate wireguard [keypair|named-keypairs]\'")
if c[ifname]['status'] != 'delete':
if not c[ifname]['addr']:
raise ConfigError("ERROR: IP address required")
if not c[ifname]['peer']:
raise ConfigError("ERROR: peer required")
for p in c[ifname]['peer']:
if not c[ifname]['peer'][p]['allowed-ips']:
raise ConfigError("ERROR: allowed-ips required for peer " + p)
if not c[ifname]['peer'][p]['pubkey']:
raise ConfigError("peer pubkey required for peer " + p)
def apply(c):
# no wg config left, delete all wireguard devices, if any
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))
sl.syslog(sl.LOG_NOTICE, "removing interface " + wg_intf)
subprocess.call(
['ip l d dev ' + wg_intf + ' >/dev/null'], shell=True)
return None
# interface removal
if c[ifname]['status'] == 'delete':
sl.syslog(sl.LOG_NOTICE, "removing interface " + ifname)
intfc.remove()
return None
c_eff = Config()
c_eff.set_level('interfaces wireguard')
# interface state
if c[ifname]['state'] == 'disable':
sl.syslog(sl.LOG_NOTICE, "disable interface " + ifname)
intfc.state = 'down'
else:
if not intfc.state == 'up':
sl.syslog(sl.LOG_NOTICE, "enable interface " + ifname)
intfc.state = 'up'
# IP address
if not c_eff.exists_effective(ifname + ' address'):
for ip in c[ifname]['addr']:
intfc.add_addr(ip)
else:
addr_eff = c_eff.return_effective_values(ifname + ' address')
addr_rem = list(set(addr_eff) - set(c[ifname]['addr']))
addr_add = list(set(c[ifname]['addr']) - set(addr_eff))
if len(addr_rem) != 0:
for ip in addr_rem:
sl.syslog(
sl.LOG_NOTICE, "remove IP address {0} from {1}".format(ip, ifname))
intfc.del_addr(ip)
if len(addr_add) != 0:
for ip in addr_add:
sl.syslog(
sl.LOG_NOTICE, "add IP address {0} to {1}".format(ip, ifname))
intfc.add_addr(ip)
# interface MTU
if c[ifname]['mtu'] != 1420:
intfc.mtu = int(c[ifname]['mtu'])
else:
# default is set to 1420 in config_data
intfc.mtu = int(c[ifname]['mtu'])
# ifalias for snmp from description
descr_eff = c_eff.return_effective_value(ifname + ' description')
if descr_eff != c[ifname]['descr']:
intfc.ifalias = str(c[ifname]['descr'])
# peer deletion
peer_eff = c_eff.list_effective_nodes(ifname + ' peer')
peer_cnf = []
try:
for p in c[ifname]['peer']:
peer_cnf.append(p)
except KeyError:
pass
peer_rem = list(set(peer_eff) - set(peer_cnf))
for p in peer_rem:
pkey = c_eff.return_effective_value(ifname + ' peer ' + p + ' pubkey')
intfc.remove_peer(pkey)
# peer key update
for p in peer_eff:
if p in peer_cnf:
ekey = c_eff.return_effective_value(
ifname + ' peer ' + p + ' pubkey')
nkey = c[ifname]['peer'][p]['pubkey']
if nkey != ekey:
sl.syslog(
sl.LOG_NOTICE, "peer {0} pubkey changed from {1} to {2} on interface {3}".format(p, ekey, nkey, ifname))
intfc.remove_peer(ekey)
intfc.config['private-key'] = c[ifname]['pk']
for p in c[ifname]['peer']:
intfc.config['pubkey'] = str(c[ifname]['peer'][p]['pubkey'])
intfc.config['allowed-ips'] = (c[ifname]['peer'][p]['allowed-ips'])
# listen-port
if c[ifname]['lport']:
intfc.config['port'] = c[ifname]['lport']
# fwmark
if c[ifname]['fwmark']:
intfc.config['fwmark'] = c[ifname]['fwmark']
# endpoint
if c[ifname]['peer'][p]['endpoint']:
intfc.config['endpoint'] = c[ifname]['peer'][p]['endpoint']
# persistent-keepalive
if 'persistent-keepalive' in c[ifname]['peer'][p]:
intfc.config['keepalive'] = c[ifname][
'peer'][p]['persistent-keepalive']
# preshared-key - needs to be read from a file
if 'psk' in c[ifname]['peer'][p]:
psk_file = '/config/auth/wireguard/psk'
old_umask = os.umask(0o077)
open(psk_file, 'w').write(str(c[ifname]['peer'][p]['psk']))
os.umask(old_umask)
intfc.config['psk'] = psk_file
intfc.update()
if __name__ == '__main__':
try:
check_kmod()
c = get_config()
verify(c)
apply(c)
except ConfigError as e:
print(e)
sys.exit(1)
|
