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apparmor/utils/test/test-rlimit.py
John Johansen c0fcd1698b utils: add support for priority rule prefix 
Add basic support for the priority rules prefix. This patch does not
allow the utils to set or suggest priorities. It allows parsing and
retaining of the priority prefix if it already exists on rules and
checking if it's in the supported range.

Signed-off-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
2025-05-05 14:54:22 -03:00

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#!/usr/bin/python3
# ----------------------------------------------------------------------
# Copyright (C) 2015 Christian Boltz <apparmor@cboltz.de>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of version 2 of the GNU General Public
# License 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.
#
# ----------------------------------------------------------------------
import unittest
from collections import namedtuple
from apparmor.common import AppArmorBug, AppArmorException
# from apparmor.logparser import ReadLog
from apparmor.rule.rlimit import RlimitRule, RlimitRuleset, split_unit
from apparmor.translations import init_translation
from common_test import AATest, setup_all_loops
_ = init_translation()
exp = namedtuple(
'exp', ('audit', 'allow_keyword', 'deny', 'comment', 'rlimit', 'value', 'all_values'))
# --- tests for single RlimitRule --- #
class RlimitTest(AATest):
def _compare_obj(self, obj, expected):
self.assertEqual(expected.allow_keyword, obj.allow_keyword)
self.assertEqual(expected.audit, obj.audit)
self.assertEqual(expected.rlimit, obj.rlimit)
self.assertEqual(expected.value, obj.value)
self.assertEqual(expected.all_values, obj.all_values)
self.assertEqual(expected.deny, obj.deny)
self.assertEqual(expected.comment, obj.comment)
class RlimitTestParse(RlimitTest):
tests = (
# rawrule audit allow deny comment rlimit value all/infinity?
('set rlimit as <= 2047MB,', exp(False, False, False, '', 'as', '2047MB', False)),
('set rlimit as <= 2047 MB,', exp(False, False, False, '', 'as', '2047 MB', False)),
('set rlimit cpu <= 1024,', exp(False, False, False, '', 'cpu', '1024', False)),
('set rlimit stack <= 1024GB,', exp(False, False, False, '', 'stack', '1024GB', False)),
('set rlimit stack <= 1024 GB,', exp(False, False, False, '', 'stack', '1024 GB', False)),
('set rlimit rtprio <= 10, # comment', exp(False, False, False, ' # comment', 'rtprio', '10', False)),
('set rlimit core <= 44444KB,', exp(False, False, False, '', 'core', '44444KB', False)),
('set rlimit core <= 44444 KB,', exp(False, False, False, '', 'core', '44444 KB', False)),
('set rlimit rttime <= 60ms,', exp(False, False, False, '', 'rttime', '60ms', False)),
('set rlimit cpu <= infinity,', exp(False, False, False, '', 'cpu', None, True)),
('set rlimit nofile <= 256,', exp(False, False, False, '', 'nofile', '256', False)),
('set rlimit data <= 4095KB,', exp(False, False, False, '', 'data', '4095KB', False)),
('set rlimit cpu <= 12, # cmt', exp(False, False, False, ' # cmt', 'cpu', '12', False)),
('set rlimit ofile <= 1234,', exp(False, False, False, '', 'ofile', '1234', False)),
('set rlimit msgqueue <= 4444,', exp(False, False, False, '', 'msgqueue', '4444', False)),
('set rlimit nice <= -10,', exp(False, False, False, '', 'nice', '-10', False)),
('set rlimit rttime <= 60minutes,', exp(False, False, False, '', 'rttime', '60minutes', False)),
('set rlimit fsize <= 1023MB,', exp(False, False, False, '', 'fsize', '1023MB', False)),
('set rlimit nproc <= 1,', exp(False, False, False, '', 'nproc', '1', False)),
('set rlimit rss <= infinity, # cmt', exp(False, False, False, ' # cmt', 'rss', None, True)),
('set rlimit memlock <= 10240,', exp(False, False, False, '', 'memlock', '10240', False)),
('set rlimit sigpending <= 42,', exp(False, False, False, '', 'sigpending', '42', False)),
)
def _run_test(self, rawrule, expected):
self.assertTrue(RlimitRule.match(rawrule))
obj = RlimitRule.create_instance(rawrule)
self.assertEqual(rawrule.strip(), obj.raw_rule)
self._compare_obj(obj, expected)
class RlimitTestParseInvalid(RlimitTest):
tests = (
('set rlimit,', AppArmorException), # missing parts
('set rlimit <= 5,', AppArmorException),
('set rlimit cpu <= ,', AppArmorException),
('set rlimit cpu <= "",', AppArmorBug), # evil quoting trick
('set rlimit foo <= 5,', AppArmorException), # unknown rlimit
('set rlimit rttime <= 60m,', AppArmorException), # 'm' could mean 'ms' or 'minutes'
('set rlimit cpu <= 20ms,', AppArmorException), # cpu doesn't support 'ms'...
('set rlimit cpu <= 20us,', AppArmorException), # ... or 'us'
('set rlimit nice <= 20MB,', AppArmorException), # invalid unit for this rlimit type
('set rlimit cpu <= 20MB,', AppArmorException),
('set rlimit data <= 20seconds,', AppArmorException),
('set rlimit locks <= 20seconds,', AppArmorException),
)
def _run_test(self, rawrule, expected):
# self.assertFalse(RlimitRule.match(rawrule)) # the main regex isn't very strict
with self.assertRaises(expected):
RlimitRule.create_instance(rawrule)
class RlimitTestParseFromLog(RlimitTest):
pass
# def test_net_from_log(self):
# parser = ReadLog('', '', '')
#
# event = 'type=AVC ...'
#
# parsed_event = parser.parse_event(event)
#
# self.assertEqual(parsed_event, {
# ...
# })
#
# obj = RlimitRule(RlimitRule.ALL, parsed_event['name2'], log_event=parsed_event)
#
# # audit allow deny comment rlimit value all?
# expected = exp(False, False, False, '', None, '/foo/rename', False)
#
# self._compare_obj(obj, expected)
#
# self.assertEqual(obj.get_raw(1), ' rlimit -> /foo/rename,')
class RlimitFromInit(RlimitTest):
tests = (
# RlimitRule object audit allow deny comment rlimit value all/infinity?
(RlimitRule('as', '2047MB'), exp(False, False, False, '', 'as', '2047MB', False)),
(RlimitRule('as', '2047 MB'), exp(False, False, False, '', 'as', '2047 MB', False)),
(RlimitRule('cpu', '1024'), exp(False, False, False, '', 'cpu', '1024', False)),
(RlimitRule('rttime', '60minutes'), exp(False, False, False, '', 'rttime', '60minutes', False)),
(RlimitRule('nice', '-10'), exp(False, False, False, '', 'nice', '-10', False)),
(RlimitRule('rss', RlimitRule.ALL), exp(False, False, False, '', 'rss', None, True)),
)
def _run_test(self, obj, expected):
self._compare_obj(obj, expected)
class InvalidRlimitInit(AATest):
tests = (
# init params expected exception
(('as', ''), AppArmorBug), # empty value
(('', '1024'), AppArmorException), # empty rlimit
((' ', '1024'), AppArmorException), # whitespace rlimit
(('as', ' '), AppArmorBug), # whitespace value
(('xyxy', '1024'), AppArmorException), # invalid rlimit
((dict(), '1024'), AppArmorBug), # wrong type for rlimit
((None, '1024'), AppArmorBug), # wrong type for rlimit
(('as', dict()), AppArmorBug), # wrong type for value
(('as', None), AppArmorBug), # wrong type for value
(('cpu', '100xy2'), AppArmorException), # invalid unit
)
def _run_test(self, params, expected):
with self.assertRaises(expected):
RlimitRule(*params)
def test_missing_params_1(self):
with self.assertRaises(TypeError):
RlimitRule()
def test_missing_params_2(self):
with self.assertRaises(TypeError):
RlimitRule('as')
def test_allow_keyword(self):
with self.assertRaises(AppArmorBug):
RlimitRule('as', '1024MB', allow_keyword=True)
def test_deny_keyword(self):
with self.assertRaises(AppArmorBug):
RlimitRule('as', '1024MB', deny=True)
def test_audit_keyword(self):
with self.assertRaises(AppArmorBug):
RlimitRule('as', '1024MB', audit=True)
def test_priority_keyword(self):
with self.assertRaises(AppArmorBug):
RlimitRule('as', '1024MB', priority=0)
class InvalidRlimitTest(AATest):
def _check_invalid_rawrule(self, rawrule):
obj = None
self.assertFalse(RlimitRule.match(rawrule))
with self.assertRaises(AppArmorException):
obj = RlimitRule.create_instance(rawrule)
self.assertIsNone(obj, 'RlimitRule handed back an object unexpectedly')
def test_invalid_net_missing_comma(self):
self._check_invalid_rawrule('rlimit') # missing comma
def test_invalid_net_non_RlimitRule(self):
self._check_invalid_rawrule('dbus,') # not a rlimit rule
def test_empty_net_data_1(self):
obj = RlimitRule('as', '1024MB')
obj.rlimit = ''
# no rlimit set, and ALL not set
with self.assertRaises(AppArmorBug):
obj.get_clean(1)
def test_empty_net_data_2(self):
obj = RlimitRule('as', '1024MB')
obj.value = ''
# no value set, and ALL not set
with self.assertRaises(AppArmorBug):
obj.get_clean(1)
class WriteRlimitTest(AATest):
tests = (
# raw rule clean rule
(' set rlimit cpu <= 1024 , # foo ', 'set rlimit cpu <= 1024, # foo'),
(' set rlimit stack <= 1024GB ,', 'set rlimit stack <= 1024GB,'),
(' set rlimit rttime <= 100ms , # foo bar', 'set rlimit rttime <= 100ms, # foo bar'),
(' set rlimit cpu <= infinity , ', 'set rlimit cpu <= infinity,'),
(' set rlimit msgqueue <= 4444 , ', 'set rlimit msgqueue <= 4444,'),
(' set rlimit nice <= 5 , # foo bar', 'set rlimit nice <= 5, # foo bar'),
(' set rlimit nice <= -5 , # cmt', 'set rlimit nice <= -5, # cmt'),
)
def _run_test(self, rawrule, expected):
self.assertTrue(RlimitRule.match(rawrule))
obj = RlimitRule.create_instance(rawrule)
clean = obj.get_clean()
raw = obj.get_raw()
self.assertEqual(expected.strip(), clean, 'unexpected clean rule')
self.assertEqual(rawrule.strip(), raw, 'unexpected raw rule')
def test_write_manually(self):
obj = RlimitRule('as', '1024MB')
expected = ' set rlimit as <= 1024MB,'
self.assertEqual(expected, obj.get_clean(2), 'unexpected clean rule')
self.assertEqual(expected, obj.get_raw(2), 'unexpected raw rule')
class RlimitCoveredTest(AATest):
def _run_test(self, param, expected):
obj = RlimitRule.create_instance(self.rule)
check_obj = RlimitRule.create_instance(param)
self.assertTrue(RlimitRule.match(param))
self.assertEqual(
obj.is_equal(check_obj), expected[0],
'Mismatch in is_equal, expected {}'.format(expected[0]))
self.assertEqual(
obj.is_equal(check_obj, True), expected[1],
'Mismatch in is_equal/strict, expected {}'.format(expected[1]))
self.assertEqual(
obj.is_covered(check_obj), expected[2],
'Mismatch in is_covered, expected {}'.format(expected[2]))
self.assertEqual(
obj.is_covered(check_obj, True, True), expected[3],
'Mismatch in is_covered/exact, expected {}'.format(expected[3]))
class RlimitCoveredTest_01(RlimitCoveredTest):
rule = 'set rlimit cpu <= 150,'
tests = (
# rule equal strict equal covered covered exact
('set rlimit as <= 100MB,', (False, False, False, False)),
('set rlimit rttime <= 150,', (False, False, False, False)),
('set rlimit cpu <= 100,', (False, False, True, True)),
('set rlimit cpu <= 150,', (True, True, True, True)),
('set rlimit cpu <= 300,', (False, False, False, False)),
('set rlimit cpu <= 10seconds,', (False, False, True, True)),
('set rlimit cpu <= 150seconds,', (True, False, True, True)),
('set rlimit cpu <= 300seconds,', (False, False, False, False)),
('set rlimit cpu <= 1minutes,', (False, False, True, True)),
('set rlimit cpu <= 1min,', (False, False, True, True)),
('set rlimit cpu <= 3minutes,', (False, False, False, False)),
('set rlimit cpu <= 1hour,', (False, False, False, False)),
('set rlimit cpu <= 2 days,', (False, False, False, False)),
('set rlimit cpu <= 1 week,', (False, False, False, False)),
)
class RlimitCoveredTest_02(RlimitCoveredTest):
rule = 'set rlimit data <= 4MB,'
tests = (
# rule equal strict equal covered covered exact
('set rlimit data <= 100,', (False, False, True, True)),
('set rlimit data <= 2KB,', (False, False, True, True)),
('set rlimit data <= 2MB,', (False, False, True, True)),
('set rlimit data <= 4194304,', (True, False, True, True)),
('set rlimit data <= 4096KB,', (True, False, True, True)),
('set rlimit data <= 4MB,', (True, True, True, True)),
('set rlimit data <= 4 MB,', (True, False, True, True)),
('set rlimit data <= 6MB,', (False, False, False, False)),
('set rlimit data <= 6 MB,', (False, False, False, False)),
('set rlimit data <= 1GB,', (False, False, False, False)),
)
class RlimitCoveredTest_03(RlimitCoveredTest):
rule = 'set rlimit nice <= -1,'
tests = (
# rule equal strict equal covered covered exact
('set rlimit nice <= 5,', (False, False, True, True)),
('set rlimit nice <= 0,', (False, False, True, True)),
('set rlimit nice <= -1,', (True, True, True, True)),
('set rlimit nice <= -3,', (False, False, False, False)),
)
class RlimitCoveredTest_04(RlimitCoveredTest):
rule = 'set rlimit locks <= 42,'
tests = (
# rule equal strict equal covered covered exact
('set rlimit locks <= 20,', (False, False, True, True)),
('set rlimit locks <= 40,', (False, False, True, True)),
('set rlimit locks <= 42,', (True, True, True, True)),
('set rlimit locks <= 60,', (False, False, False, False)),
('set rlimit locks <= infinity,', (False, False, False, False)),
)
class RlimitCoveredTest_05(RlimitCoveredTest):
rule = 'set rlimit locks <= infinity,'
tests = (
# rule equal strict equal covered covered exact
('set rlimit locks <= 20,', (False, False, True, True)),
('set rlimit cpu <= 40,', (False, False, False, False)),
('set rlimit locks <= infinity,', (True, True, True, True)),
)
class RlimitCoveredTest_Invalid(AATest):
def test_borked_obj_is_covered_1(self):
obj = RlimitRule.create_instance('set rlimit cpu <= 1024,')
testobj = RlimitRule('cpu', '1024')
testobj.rlimit = ''
with self.assertRaises(AppArmorBug):
obj.is_covered(testobj)
def test_borked_obj_is_covered_2(self):
obj = RlimitRule.create_instance('set rlimit cpu <= 1024,')
testobj = RlimitRule('cpu', '1024')
testobj.value = ''
with self.assertRaises(AppArmorBug):
obj.is_covered(testobj)
def test_invalid_is_covered(self):
raw_rule = 'set rlimit cpu <= 1024,'
class SomeOtherClass(RlimitRule):
pass
obj = RlimitRule.create_instance(raw_rule)
testobj = SomeOtherClass.create_instance(raw_rule) # different type
with self.assertRaises(AppArmorBug):
obj.is_covered(testobj)
def test_invalid_is_equal(self):
raw_rule = 'set rlimit cpu <= 1024,'
class SomeOtherClass(RlimitRule):
pass
obj = RlimitRule.create_instance(raw_rule)
testobj = SomeOtherClass.create_instance(raw_rule) # different type
with self.assertRaises(AppArmorBug):
obj.is_equal(testobj)
class RlimitLogprofHeaderTest(AATest):
tests = (
('set rlimit cpu <= infinity,', [_('Rlimit'), 'cpu', _('Value'), 'infinity']),
('set rlimit as <= 200MB,', [_('Rlimit'), 'as', _('Value'), '200MB']),
('set rlimit rttime <= 200ms,', [_('Rlimit'), 'rttime', _('Value'), '200ms']),
('set rlimit nproc <= 1,', [_('Rlimit'), 'nproc', _('Value'), '1']),
)
def _run_test(self, params, expected):
obj = RlimitRule.create_instance(params)
self.assertEqual(obj.logprof_header(), expected)
# --- tests for RlimitRuleset --- #
class RlimitRulesTest(AATest):
def test_empty_ruleset(self):
ruleset = RlimitRuleset()
ruleset_2 = RlimitRuleset()
self.assertEqual([], ruleset.get_raw(2))
self.assertEqual([], ruleset.get_clean(2))
self.assertEqual([], ruleset_2.get_raw(2))
self.assertEqual([], ruleset_2.get_clean(2))
def test_ruleset_1(self):
ruleset = RlimitRuleset()
rules = [
' set rlimit cpu <= 100,',
' set rlimit as <= 50MB,',
]
expected_raw = [
'set rlimit cpu <= 100,',
'set rlimit as <= 50MB,',
'',
]
expected_clean = [
'set rlimit as <= 50MB,',
'set rlimit cpu <= 100,',
'',
]
for rule in rules:
ruleset.add(RlimitRule.create_instance(rule))
self.assertEqual(expected_raw, ruleset.get_raw())
self.assertEqual(expected_clean, ruleset.get_clean())
class RlimitGlobTestAATest(AATest):
def setUp(self):
self.ruleset = RlimitRuleset()
def test_glob_1(self):
with self.assertRaises(AppArmorBug):
self.ruleset.get_glob('set rlimit cpu <= 100,')
# not supported or used yet, glob behaviour not decided yet
# def test_glob_2(self):
# self.assertEqual(self.ruleset.get_glob('rlimit /foo -> /bar,'), 'rlimit -> /bar,')
def test_glob_ext(self):
with self.assertRaises(NotImplementedError):
# get_glob_ext is not available for rlimit rules
self.ruleset.get_glob_ext('set rlimit cpu <= 100,')
class RlimitDeleteTestAATest(AATest):
# no de-duplication tests for rlimit - de-duplication consists of is_covered() (which we already test) and
# code from BaseRuleset (which is already tested in the capability, network and change_profile tests).
# Therefore no need to test it once more ;-)
pass
# --- other tests --- #
class RlimitSplit_unitTest(AATest):
tests = (
('40MB', (40, 'MB')),
('40 MB', (40, 'MB')),
('40', (40, '')),
)
def _run_test(self, params, expected):
self.assertEqual(split_unit(params), expected)
def test_invalid_split_unit(self):
with self.assertRaises(AppArmorBug):
split_unit('MB')
class RlimitSize_to_intTest(AATest):
def AASetup(self):
self.obj = RlimitRule('cpu', '1')
tests = (
('40GB', 40 * 1024 * 1024 * 1024),
('40MB', 41943040),
('40KB', 40960),
('40', 40),
)
def _run_test(self, params, expected):
self.assertEqual(self.obj.size_to_int(params), expected)
def test_invalid_size_to_int_01(self):
with self.assertRaises(AppArmorException):
self.obj.size_to_int('20mice')
class RlimitTime_to_intTest(AATest):
def AASetup(self):
self.obj = RlimitRule('cpu', '1')
tests = (
('40', 0.00004),
('30us', 0.00003),
('40ms', 0.04),
('40seconds', 40),
('2minutes', 2 * 60),
('2hours', 2 * 60 * 60),
('1 day', 1 * 60 * 60 * 24),
('2 weeks', 2 * 60 * 60 * 24 * 7),
)
def _run_test(self, params, expected):
self.assertEqual(self.obj.time_to_int(params, 'us'), expected)
def test_with_seconds_as_default(self):
self.assertEqual(self.obj.time_to_int('40', 'seconds'), 40)
def test_with_ms_as_default(self):
self.assertEqual(self.obj.time_to_int('40', 'ms'), 0.04)
def test_with_us_as_default(self):
self.assertEqual(self.obj.time_to_int('30', 'us'), 0.00003)
def test_invalid_time_to_int(self):
with self.assertRaises(AppArmorException):
self.obj.time_to_int('20mice', 'seconds')
setup_all_loops(__name__)
if __name__ == '__main__':
unittest.main(verbosity=1)
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