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test_interfaces_macsec.py
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test_interfaces_macsec.py
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#!/usr/bin/env python3
#
# Copyright (C) 2020-2021 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 re
import unittest
from base_interfaces_test import BasicInterfaceTest
from netifaces import interfaces
from vyos.configsession import ConfigSessionError
from vyos.ifconfig import Section
from vyos.util import read_file
from vyos.util import process_named_running
def get_config_value(interface, key):
tmp = read_file(f'/run/wpa_supplicant/{interface}.conf')
tmp = re.findall(r'\n?{}=(.*)'.format(key), tmp)
return tmp[0]
class MACsecInterfaceTest(BasicInterfaceTest.BaseTest):
@classmethod
def setUpClass(cls):
cls._test_ip = True
cls._test_ipv6 = True
cls._base_path = ['interfaces', 'macsec']
cls._options = { 'macsec0': ['source-interface eth0', 'security cipher gcm-aes-128'] }
# if we have a physical eth1 interface, add a second macsec instance
if 'eth1' in Section.interfaces('ethernet'):
macsec = { 'macsec1': [f'source-interface eth1', 'security cipher gcm-aes-128'] }
cls._options.update(macsec)
cls._interfaces = list(cls._options)
def test_macsec_encryption(self):
# MACsec can be operating in authentication and encryption mode - both
# using different mandatory settings, lets test encryption as the basic
# authentication test has been performed using the base class tests
mak_cak = '232e44b7fda6f8e2d88a07bf78a7aff4'
mak_ckn = '40916f4b23e3d548ad27eedd2d10c6f98c2d21684699647d63d41b500dfe8836'
replay_window = '64'
for interface, option_value in self._options.items():
for option in option_value:
if option.split()[0] == 'source-interface':
src_interface = option.split()[1]
self.session.set(self._base_path + [interface] + option.split())
# Encrypt link
self.session.set(self._base_path + [interface, 'security', 'encrypt'])
# check validate() - Physical source interface MTU must be higher then our MTU
self.session.set(self._base_path + [interface, 'mtu', '1500'])
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.delete(self._base_path + [interface, 'mtu'])
# check validate() - MACsec security keys mandartory when encryption is enabled
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'security', 'mka', 'cak', mak_cak])
# check validate() - MACsec security keys mandartory when encryption is enabled
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'security', 'mka', 'ckn', mak_ckn])
self.session.set(self._base_path + [interface, 'security', 'replay-window', replay_window])
# final commit of settings
self.session.commit()
tmp = get_config_value(src_interface, 'macsec_integ_only')
self.assertTrue("0" in tmp)
tmp = get_config_value(src_interface, 'mka_cak')
self.assertTrue(mak_cak in tmp)
tmp = get_config_value(src_interface, 'mka_ckn')
self.assertTrue(mak_ckn in tmp)
# check that the default priority of 255 is programmed
tmp = get_config_value(src_interface, 'mka_priority')
self.assertTrue("255" in tmp)
tmp = get_config_value(src_interface, 'macsec_replay_window')
self.assertTrue(replay_window in tmp)
tmp = read_file(f'/sys/class/net/{interface}/mtu')
self.assertEqual(tmp, '1460')
# Check for running process
self.assertTrue(process_named_running('wpa_supplicant'))
def test_macsec_mandatory_options(self):
interface = 'macsec1'
self.session.set(self._base_path + [interface])
# check validate() - source interface is mandatory
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'source-interface', 'eth0'])
# check validate() - cipher is mandatory
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'security', 'cipher', 'gcm-aes-128'])
# final commit and verify
self.session.commit()
self.assertIn(interface, interfaces())
def test_macsec_source_interface(self):
# Ensure source-interface can bot be part of any other bond or bridge
base_bridge = ['interfaces', 'bridge', 'br200']
base_bond = ['interfaces', 'bonding', 'bond200']
for interface, option_value in self._options.items():
for option in option_value:
self.session.set(self._base_path + [interface] + option.split())
if option.split()[0] == 'source-interface':
src_interface = option.split()[1]
self.session.set(base_bridge + ['member', 'interface', src_interface])
# check validate() - Source interface must not already be a member of a bridge
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.delete(base_bridge)
self.session.set(base_bond + ['member', 'interface', src_interface])
# check validate() - Source interface must not already be a member of a bridge
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.delete(base_bond)
# final commit and verify
self.session.commit()
self.assertIn(interface, interfaces())
if __name__ == '__main__':
unittest.main(verbosity=2)

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