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test_service_snmp.py
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test_service_snmp.py
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#!/usr/bin/env python3
#
# Copyright (C) 2019-2021 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_vyostest_shim import VyOSUnitTestSHIM
from vyos.configsession import ConfigSessionError
from vyos.template import is_ipv4
from vyos.template import address_from_cidr
from vyos.util import call
from vyos.util import DEVNULL
from vyos.util import read_file
from vyos.util import process_named_running
from vyos.version import get_version_data
PROCESS_NAME = 'snmpd'
SNMPD_CONF = '/etc/snmp/snmpd.conf'
base_path = ['service', 'snmp']
snmpv3_group = 'default_group'
snmpv3_view = 'default_view'
snmpv3_view_oid = '1'
snmpv3_user = 'vyos'
snmpv3_auth_pw = 'vyos12345678'
snmpv3_priv_pw = 'vyos87654321'
snmpv3_engine_id = '000000000000000000000002'
def get_config_value(key):
tmp = read_file(SNMPD_CONF)
tmp = re.findall(r'\n?{}\s+(.*)'.format(key), tmp)
return tmp[0]
class TestSNMPService(VyOSUnitTestSHIM.TestCase):
@classmethod
def setUpClass(cls):
super(TestSNMPService, cls).setUpClass()
# ensure we can also run this test on a live system - so lets clean
# out the current configuration :)
cls.cli_delete(cls, base_path)
def tearDown(self):
# Check for running process
self.assertTrue(process_named_running(PROCESS_NAME))
# delete testing SNMP config
self.cli_delete(base_path)
self.cli_commit()
# Check for running process
self.assertFalse(process_named_running(PROCESS_NAME))
def test_snmp_basic(self):
dummy_if = 'dum7312'
dummy_addr = '100.64.0.1/32'
contact = 'maintainers@vyos.io'
location = 'QEMU'
self.cli_set(['interfaces', 'dummy', dummy_if, 'address', dummy_addr])
# Check if SNMP can be configured and service runs
clients = ['192.0.2.1', '2001:db8::1']
networks = ['192.0.2.128/25', '2001:db8:babe::/48']
listen = ['127.0.0.1', '::1', address_from_cidr(dummy_addr)]
port = '5000'
for auth in ['ro', 'rw']:
community = 'VyOS' + auth
self.cli_set(base_path + ['community', community, 'authorization', auth])
for client in clients:
self.cli_set(base_path + ['community', community, 'client', client])
for network in networks:
self.cli_set(base_path + ['community', community, 'network', network])
for addr in listen:
self.cli_set(base_path + ['listen-address', addr, 'port', port])
self.cli_set(base_path + ['contact', contact])
self.cli_set(base_path + ['location', location])
self.cli_commit()
# verify listen address, it will be returned as
# ['unix:/run/snmpd.socket,udp:127.0.0.1:161,udp6:[::1]:161']
# thus we need to transfor this into a proper list
config = get_config_value('agentaddress')
expected = 'unix:/run/snmpd.socket'
self.assertIn(expected, config)
for addr in listen:
if is_ipv4(addr):
expected = f'udp:{addr}:{port}'
else:
expected = f'udp6:[{addr}]:{port}'
self.assertIn(expected, config)
config = get_config_value('sysDescr')
version_data = get_version_data()
self.assertEqual('VyOS ' + version_data['version'], config)
config = get_config_value('SysContact')
self.assertEqual(contact, config)
config = get_config_value('SysLocation')
self.assertEqual(location, config)
# Check for running process
self.assertTrue(process_named_running(PROCESS_NAME))
self.cli_delete(['interfaces', 'dummy', dummy_if])
## Check communities and default view RESTRICTED
for auth in ['ro', 'rw']:
community = 'VyOS' + auth
for addr in clients:
if is_ipv4(addr):
entry = auth + 'community ' + community + ' ' + addr + ' -V'
else:
entry = auth + 'community6 ' + community + ' ' + addr + ' -V'
config = get_config_value(entry)
expected = 'RESTRICTED'
self.assertIn(expected, config)
for addr in networks:
if is_ipv4(addr):
entry = auth + 'community ' + community + ' ' + addr + ' -V'
else:
entry = auth + 'community6 ' + community + ' ' + addr + ' -V'
config = get_config_value(entry)
expected = 'RESTRICTED'
self.assertIn(expected, config)
# And finally check global entry for RESTRICTED view
config = get_config_value('view RESTRICTED included .1')
self.assertIn('80', config)
def test_snmpv3_sha(self):
# Check if SNMPv3 can be configured with SHA authentication
# and service runs
self.cli_set(base_path + ['v3', 'engineid', snmpv3_engine_id])
self.cli_set(base_path + ['v3', 'group', 'default', 'mode', 'ro'])
# check validate() - a view must be created before this can be committed
with self.assertRaises(ConfigSessionError):
self.cli_commit()
self.cli_set(base_path + ['v3', 'view', 'default', 'oid', '1'])
self.cli_set(base_path + ['v3', 'group', 'default', 'view', 'default'])
# create user
self.cli_set(base_path + ['v3', 'user', snmpv3_user, 'auth', 'plaintext-password', snmpv3_auth_pw])
self.cli_set(base_path + ['v3', 'user', snmpv3_user, 'auth', 'type', 'sha'])
self.cli_set(base_path + ['v3', 'user', snmpv3_user, 'privacy', 'plaintext-password', snmpv3_priv_pw])
self.cli_set(base_path + ['v3', 'user', snmpv3_user, 'privacy', 'type', 'aes'])
self.cli_set(base_path + ['v3', 'user', snmpv3_user, 'group', 'default'])
self.cli_commit()
# commit will alter the CLI values - check if they have been updated:
hashed_password = '4e52fe55fd011c9c51ae2c65f4b78ca93dcafdfe'
tmp = self._session.show_config(base_path + ['v3', 'user', snmpv3_user, 'auth', 'encrypted-password']).split()[1]
self.assertEqual(tmp, hashed_password)
hashed_password = '54705c8de9e81fdf61ad7ac044fa8fe611ddff6b'
tmp = self._session.show_config(base_path + ['v3', 'user', snmpv3_user, 'privacy', 'encrypted-password']).split()[1]
self.assertEqual(tmp, hashed_password)
# TODO: read in config file and check values
# Try SNMPv3 connection
tmp = call(f'snmpwalk -v 3 -u {snmpv3_user} -a SHA -A {snmpv3_auth_pw} -x AES -X {snmpv3_priv_pw} -l authPriv 127.0.0.1', stdout=DEVNULL)
self.assertEqual(tmp, 0)
def test_snmpv3_md5(self):
# Check if SNMPv3 can be configured with MD5 authentication
# and service runs
self.cli_set(base_path + ['v3', 'engineid', snmpv3_engine_id])
# create user
self.cli_set(base_path + ['v3', 'user', snmpv3_user, 'auth', 'plaintext-password', snmpv3_auth_pw])
self.cli_set(base_path + ['v3', 'user', snmpv3_user, 'auth', 'type', 'md5'])
self.cli_set(base_path + ['v3', 'user', snmpv3_user, 'privacy', 'plaintext-password', snmpv3_priv_pw])
self.cli_set(base_path + ['v3', 'user', snmpv3_user, 'privacy', 'type', 'des'])
# check validate() - user requires a group to be created
with self.assertRaises(ConfigSessionError):
self.cli_commit()
self.cli_set(base_path + ['v3', 'user', 'vyos', 'group', snmpv3_group])
self.cli_set(base_path + ['v3', 'group', snmpv3_group, 'mode', 'ro'])
# check validate() - a view must be created before this can be comitted
with self.assertRaises(ConfigSessionError):
self.cli_commit()
self.cli_set(base_path + ['v3', 'view', snmpv3_view, 'oid', snmpv3_view_oid])
self.cli_set(base_path + ['v3', 'group', snmpv3_group, 'view', snmpv3_view])
self.cli_commit()
# commit will alter the CLI values - check if they have been updated:
hashed_password = '4c67690d45d3dfcd33d0d7e308e370ad'
tmp = self._session.show_config(base_path + ['v3', 'user', 'vyos', 'auth', 'encrypted-password']).split()[1]
self.assertEqual(tmp, hashed_password)
hashed_password = 'e11c83f2c510540a3c4de84ee66de440'
tmp = self._session.show_config(base_path + ['v3', 'user', 'vyos', 'privacy', 'encrypted-password']).split()[1]
self.assertEqual(tmp, hashed_password)
tmp = read_file(SNMPD_CONF)
# views
self.assertIn(f'view {snmpv3_view} included .{snmpv3_view_oid}', tmp)
# group
self.assertIn(f'group {snmpv3_group} usm {snmpv3_user}', tmp)
# access
self.assertIn(f'access {snmpv3_group} "" usm auth exact {snmpv3_view} none none', tmp)
# Try SNMPv3 connection
tmp = call(f'snmpwalk -v 3 -u {snmpv3_user} -a MD5 -A {snmpv3_auth_pw} -x DES -X {snmpv3_priv_pw} -l authPriv 127.0.0.1', stdout=DEVNULL)
self.assertEqual(tmp, 0)
if __name__ == '__main__':
unittest.main(verbosity=2)

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