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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2011 OpenStack LLC
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import ConfigParser
import logging
import logging.handlers
import os
import stubout
import subprocess
import unittest
from openstack.common.rootwrap import filters
from openstack.common.rootwrap import wrapper
class RootwrapTestCase(unittest.TestCase):
def setUp(self):
super(RootwrapTestCase, self).setUp()
self.stubs = stubout.StubOutForTesting()
self.filters = [
filters.RegExpFilter("/bin/ls", "root", 'ls', '/[a-z]+'),
filters.CommandFilter("/usr/bin/foo_bar_not_exist", "root"),
filters.RegExpFilter("/bin/cat", "root", 'cat', '/[a-z]+'),
filters.CommandFilter("/nonexistent/cat", "root"),
filters.CommandFilter("/bin/cat", "root") # Keep this one last
]
def test_RegExpFilter_match(self):
usercmd = ["ls", "/root"]
filtermatch = wrapper.match_filter(self.filters, usercmd)
self.assertFalse(filtermatch is None)
self.assertEqual(filtermatch.get_command(usercmd),
["/bin/ls", "/root"])
def test_RegExpFilter_reject(self):
usercmd = ["ls", "root"]
self.assertRaises(wrapper.NoFilterMatched,
wrapper.match_filter, self.filters, usercmd)
def test_missing_command(self):
valid_but_missing = ["foo_bar_not_exist"]
invalid = ["foo_bar_not_exist_and_not_matched"]
self.assertRaises(wrapper.FilterMatchNotExecutable,
wrapper.match_filter,
self.filters, valid_but_missing)
self.assertRaises(wrapper.NoFilterMatched,
wrapper.match_filter, self.filters, invalid)
def _test_DnsmasqFilter(self, filter_class, config_file_arg):
usercmd = ['env', config_file_arg + '=A', 'NETWORK_ID=foobar',
'dnsmasq', 'foo']
f = filter_class("/usr/bin/dnsmasq", "root")
self.assertTrue(f.match(usercmd))
self.assertEqual(f.get_command(usercmd), ['/usr/bin/dnsmasq', 'foo'])
env = f.get_environment(usercmd)
self.assertEqual(env.get(config_file_arg), 'A')
self.assertEqual(env.get('NETWORK_ID'), 'foobar')
def test_DnsmasqFilter(self):
self._test_DnsmasqFilter(filters.DnsmasqFilter, 'CONFIG_FILE')
def test_DeprecatedDnsmasqFilter(self):
self._test_DnsmasqFilter(filters.DeprecatedDnsmasqFilter, 'FLAGFILE')
def test_KillFilter(self):
if not os.path.exists("/proc/%d" % os.getpid()):
self.skipTest("Test requires /proc filesystem (procfs)")
p = subprocess.Popen(["cat"], stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
try:
f = filters.KillFilter("root", "/bin/cat", "-9", "-HUP")
f2 = filters.KillFilter("root", "/usr/bin/cat", "-9", "-HUP")
usercmd = ['kill', '-ALRM', p.pid]
# Incorrect signal should fail
self.assertFalse(f.match(usercmd) or f2.match(usercmd))
usercmd = ['kill', p.pid]
# Providing no signal should fail
self.assertFalse(f.match(usercmd) or f2.match(usercmd))
# Providing matching signal should be allowed
usercmd = ['kill', '-9', p.pid]
self.assertTrue(f.match(usercmd) or f2.match(usercmd))
f = filters.KillFilter("root", "/bin/cat")
f2 = filters.KillFilter("root", "/usr/bin/cat")
usercmd = ['kill', os.getpid()]
# Our own PID does not match /bin/sleep, so it should fail
self.assertFalse(f.match(usercmd) or f2.match(usercmd))
usercmd = ['kill', 999999]
# Nonexistent PID should fail
self.assertFalse(f.match(usercmd) or f2.match(usercmd))
usercmd = ['kill', p.pid]
# Providing no signal should work
self.assertTrue(f.match(usercmd) or f2.match(usercmd))
finally:
# Terminate the "cat" process and wait for it to finish
p.terminate()
p.wait()
def test_KillFilter_no_raise(self):
"""Makes sure ValueError from bug 926412 is gone"""
f = filters.KillFilter("root", "")
# Providing anything other than kill should be False
usercmd = ['notkill', 999999]
self.assertFalse(f.match(usercmd))
# Providing something that is not a pid should be False
usercmd = ['kill', 'notapid']
self.assertFalse(f.match(usercmd))
def test_KillFilter_deleted_exe(self):
"""Makes sure deleted exe's are killed correctly"""
# See bug #967931.
def fake_readlink(blah):
return '/bin/commandddddd (deleted)'
f = filters.KillFilter("root", "/bin/commandddddd")
usercmd = ['kill', 1234]
# Providing no signal should work
self.stubs.Set(os, 'readlink', fake_readlink)
self.assertTrue(f.match(usercmd))
def test_ReadFileFilter(self):
goodfn = '/good/file.name'
f = filters.ReadFileFilter(goodfn)
usercmd = ['cat', '/bad/file']
self.assertFalse(f.match(['cat', '/bad/file']))
usercmd = ['cat', goodfn]
self.assertEqual(f.get_command(usercmd), ['/bin/cat', goodfn])
self.assertTrue(f.match(usercmd))
def test_exec_dirs_search(self):
# This test supposes you have /bin/cat or /usr/bin/cat locally
f = filters.CommandFilter("cat", "root")
usercmd = ['cat', '/f']
self.assertTrue(f.match(usercmd))
self.assertTrue(f.get_command(usercmd,
exec_dirs=['/bin', '/usr/bin'])
in (['/bin/cat', '/f'], ['/usr/bin/cat', '/f']))
def test_skips(self):
# Check that all filters are skipped and that the last matches
usercmd = ["cat", "/"]
filtermatch = wrapper.match_filter(self.filters, usercmd)
self.assertTrue(filtermatch is self.filters[-1])
def test_RootwrapConfig(self):
raw = ConfigParser.RawConfigParser()
# Empty config should raise ConfigParser.Error
self.assertRaises(ConfigParser.Error, wrapper.RootwrapConfig, raw)
# Check default values
raw.set('DEFAULT', 'filters_path', '/a,/b')
config = wrapper.RootwrapConfig(raw)
self.assertEqual(config.filters_path, ['/a', '/b'])
self.assertEqual(config.exec_dirs, os.environ["PATH"].split(':'))
self.assertFalse(config.use_syslog)
self.assertEqual(config.syslog_log_facility,
logging.handlers.SysLogHandler.LOG_SYSLOG)
self.assertEqual(config.syslog_log_level, logging.ERROR)
# Check general values
raw.set('DEFAULT', 'exec_dirs', '/a,/x')
config = wrapper.RootwrapConfig(raw)
self.assertEqual(config.exec_dirs, ['/a', '/x'])
raw.set('DEFAULT', 'use_syslog', 'oui')
self.assertRaises(ValueError, wrapper.RootwrapConfig, raw)
raw.set('DEFAULT', 'use_syslog', 'true')
config = wrapper.RootwrapConfig(raw)
self.assertTrue(config.use_syslog)
raw.set('DEFAULT', 'syslog_log_facility', 'moo')
self.assertRaises(ValueError, wrapper.RootwrapConfig, raw)
raw.set('DEFAULT', 'syslog_log_facility', 'local0')
config = wrapper.RootwrapConfig(raw)
self.assertEqual(config.syslog_log_facility,
logging.handlers.SysLogHandler.LOG_LOCAL0)
raw.set('DEFAULT', 'syslog_log_facility', 'LOG_AUTH')
config = wrapper.RootwrapConfig(raw)
self.assertEqual(config.syslog_log_facility,
logging.handlers.SysLogHandler.LOG_AUTH)
raw.set('DEFAULT', 'syslog_log_level', 'bar')
self.assertRaises(ValueError, wrapper.RootwrapConfig, raw)
raw.set('DEFAULT', 'syslog_log_level', 'INFO')
config = wrapper.RootwrapConfig(raw)
self.assertEqual(config.syslog_log_level, logging.INFO)
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