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#!/usr/bin/env python3
""" Wg tests """
from scapy.packet import Packet
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from scapy.contrib.wireguard import Wireguard, WireguardResponse, \
WireguardInitiation
from cryptography.hazmat.primitives.asymmetric.x25519 import X25519PrivateKey
from cryptography.hazmat.primitives.serialization import Encoding, \
PrivateFormat, PublicFormat, NoEncryption
from vpp_ipip_tun_interface import VppIpIpTunInterface
from vpp_interface import VppInterface
from vpp_object import VppObject
from framework import VppTestCase
from re import compile
import unittest
""" TestWg is a subclass of VPPTestCase classes.
Wg test.
"""
class VppWgInterface(VppInterface):
"""
VPP WireGuard interface
"""
def __init__(self, test, src, port, key=None):
super(VppWgInterface, self).__init__(test)
self.key = key
if not self.key:
self.generate = True
else:
self.generate = False
self.port = port
self.src = src
def add_vpp_config(self):
r = self.test.vapi.wireguard_interface_create(interface={
'user_instance': 0xffffffff,
'port': self.port,
'src_ip': self.src,
'private_key': self.key_bytes()
})
self.set_sw_if_index(r.sw_if_index)
self.test.registry.register(self, self.test.logger)
return self
def key_bytes(self):
if self.key:
return self.key.private_bytes(Encoding.Raw,
PrivateFormat.Raw,
NoEncryption())
else:
return bytearray(32)
def remove_vpp_config(self):
self.test.vapi.wireguard_interface_delete(
sw_if_index=self._sw_if_index)
def query_vpp_config(self):
ts = self.test.vapi.wireguard_interface_dump(sw_if_index=0xffffffff)
for t in ts:
if t.interface.sw_if_index == self._sw_if_index and \
str(t.interface.src_ip) == self.src and \
t.interface.port == self.port and \
t.interface.private_key == self.key_bytes():
return True
return False
def __str__(self):
return self.object_id()
def object_id(self):
return "wireguard-%d" % self._sw_if_index
def find_route(test, prefix, table_id=0):
routes = test.vapi.ip_route_dump(table_id, False)
for e in routes:
if table_id == e.route.table_id \
and str(e.route.prefix) == str(prefix):
return True
return False
class VppWgPeer(VppObject):
def __init__(self,
test,
itf,
endpoint,
port,
allowed_ips,
persistent_keepalive=15):
self._test = test
self.itf = itf
self.endpoint = endpoint
self.port = port
self.allowed_ips = allowed_ips
self.persistent_keepalive = persistent_keepalive
self.private_key = X25519PrivateKey.generate()
self.public_key = self.private_key.public_key()
self.hash = bytearray(16)
def validate_routing(self):
for a in self.allowed_ips:
self._test.assertTrue(find_route(self._test, a))
def validate_no_routing(self):
for a in self.allowed_ips:
self._test.assertFalse(find_route(self._test, a))
def add_vpp_config(self):
rv = self._test.vapi.wireguard_peer_add(
peer={
'public_key': self.public_key_bytes(),
'port': self.port,
'endpoint': self.endpoint,
'n_allowed_ips': len(self.allowed_ips),
'allowed_ips': self.allowed_ips,
'sw_if_index': self.itf.sw_if_index,
'persistent_keepalive': self.persistent_keepalive})
self.index = rv.peer_index
self._test.registry.register(self, self._test.logger)
self.validate_routing()
return self
def remove_vpp_config(self):
self._test.vapi.wireguard_peer_remove(peer_index=self.index)
self.validate_no_routing()
def object_id(self):
return ("wireguard-peer-%s" % self.index)
def public_key_bytes(self):
return self.public_key.public_bytes(Encoding.Raw,
PublicFormat.Raw)
def private_key_bytes(self):
return self.private_key.private_bytes(Encoding.Raw,
PrivateFormat.Raw,
NoEncryption())
def query_vpp_config(self):
peers = self._test.vapi.wireguard_peers_dump()
for p in peers:
if p.peer.public_key == self.public_key_bytes() and \
p.peer.port == self.port and \
str(p.peer.endpoint) == self.endpoint and \
p.peer.sw_if_index == self.itf.sw_if_index and \
len(self.allowed_ips) == p.peer.n_allowed_ips:
self.allowed_ips.sort()
p.peer.allowed_ips.sort()
for (a1, a2) in zip(self.allowed_ips, p.peer.allowed_ips):
if str(a1) != str(a2):
return False
return True
return False
class TestWg(VppTestCase):
""" Wireguard Test Case """
error_str = compile(r"Error")
@classmethod
def setUpClass(cls):
super(TestWg, cls).setUpClass()
try:
cls.create_pg_interfaces(range(3))
for i in cls.pg_interfaces:
i.admin_up()
i.config_ip4()
i.resolve_arp()
except Exception:
super(TestWg, cls).tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestWg, cls).tearDownClass()
def test_wg_interface(self):
port = 12312
# Create interface
wg0 = VppWgInterface(self,
self.pg1.local_ip4,
port).add_vpp_config()
self.logger.info(self.vapi.cli("sh int"))
# delete interface
wg0.remove_vpp_config()
def test_wg_peer(self):
wg_output_node_name = '/err/wg-output-tun/'
wg_input_node_name = '/err/wg-input/'
port = 12323
# Create interfaces
wg0 = VppWgInterface(self,
self.pg1.local_ip4,
port,
key=X25519PrivateKey.generate()).add_vpp_config()
wg1 = VppWgInterface(self,
self.pg2.local_ip4,
port+1).add_vpp_config()
wg0.admin_up()
wg1.admin_up()
# Check peer counter
self.assertEqual(len(self.vapi.wireguard_peers_dump()), 0)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
peer_1 = VppWgPeer(self,
wg0,
self.pg1.remote_ip4,
port+1,
["10.11.2.0/24",
"10.11.3.0/24"]).add_vpp_config()
self.assertEqual(len(self.vapi.wireguard_peers_dump()), 1)
# wait for the peer to send a handshake
capture = self.pg1.get_capture(1, timeout=2)
handshake = capture[0]
self.assertEqual(handshake[IP].src, wg0.src)
self.assertEqual(handshake[IP].dst, peer_1.endpoint)
self.assertEqual(handshake[UDP].sport, wg0.port)
self.assertEqual(handshake[UDP].dport, peer_1.port)
handshake = Wireguard(handshake[Raw])
self.assertEqual(handshake.message_type, 1) # "initiate")
init = handshake[WireguardInitiation]
# route a packet into the wg interface
# use the allowed-ip prefix
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst="10.11.3.2") /
UDP(sport=555, dport=556) /
Raw())
# rx = self.send_and_expect(self.pg0, [p], self.pg1)
rx = self.send_and_assert_no_replies(self.pg0, [p])
self.logger.info(self.vapi.cli("sh error"))
init_sent = wg_output_node_name + "Keypair error"
self.assertEqual(1, self.statistics.get_err_counter(init_sent))
# Create many peers on sencond interface
NUM_PEERS = 16
self.pg2.generate_remote_hosts(NUM_PEERS)
self.pg2.configure_ipv4_neighbors()
peers = []
for i in range(NUM_PEERS):
peers.append(VppWgPeer(self,
wg1,
self.pg2.remote_hosts[i].ip4,
port+1+i,
["10.10.%d.4/32" % i]).add_vpp_config())
self.assertEqual(len(self.vapi.wireguard_peers_dump()), i+2)
self.logger.info(self.vapi.cli("show wireguard peer"))
self.logger.info(self.vapi.cli("show wireguard interface"))
self.logger.info(self.vapi.cli("show adj 37"))
self.logger.info(self.vapi.cli("sh ip fib 172.16.3.17"))
self.logger.info(self.vapi.cli("sh ip fib 10.11.3.0"))
# remove peers
for p in peers:
self.assertTrue(p.query_vpp_config())
p.remove_vpp_config()
self.assertEqual(len(self.vapi.wireguard_peers_dump()), 1)
peer_1.remove_vpp_config()
self.assertEqual(len(self.vapi.wireguard_peers_dump()), 0)
wg0.remove_vpp_config()
# wg1.remove_vpp_config()
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