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assertte.py

# Copyright 2020, Microsoft Corporation
# Copyright 2020, Chris PeBenito <pebenito@ieee.org>
#
# SPDX-License-Identifier: LGPL-2.1-only
#

import logging
from typing import List, Union

from ..exception import InvalidCheckValue
from ..policyrep import AnyTERule
from ..terulequery import TERuleQuery
from .checkermodule import CheckerModule
from .descriptors import ConfigDescriptor, ConfigSetDescriptor, ConfigPermissionSetDescriptor

SOURCE_OPT = "source"
TARGET_OPT = "target"
CLASS_OPT = "tclass"
PERMS_OPT = "perms"
EXEMPT_SRC_OPT = "exempt_source"
EXEMPT_TGT_OPT = "exempt_target"
EXPECT_SRC_OPT = "expect_source"
EXPECT_TGT_OPT = "expect_target"

class AssertTE(CheckerModule):

"""Checker module for asserting a type enforcement allow rule exists (or not)."""

check_type = "assert_te"
    check_config = frozenset((SOURCE_OPT, TARGET_OPT, CLASS_OPT, PERMS_OPT, EXEMPT_SRC_OPT,
                              EXEMPT_TGT_OPT, EXPECT_SRC_OPT, EXPECT_TGT_OPT))

source = ConfigDescriptor("lookup_type_or_attr")
    target = ConfigDescriptor("lookup_type_or_attr")
    tclass = ConfigSetDescriptor("lookup_class", strict=True, expand=False)
    perms = ConfigPermissionSetDescriptor()

exempt_source = ConfigSetDescriptor("lookup_type_or_attr", strict=False, expand=True)
    exempt_target = ConfigSetDescriptor("lookup_type_or_attr", strict=False, expand=True)
    expect_source = ConfigSetDescriptor("lookup_type_or_attr", strict=True, expand=True)
    expect_target = ConfigSetDescriptor("lookup_type_or_attr", strict=True, expand=True)

def __init__(self, policy, checkname, config) -> None:
        super().__init__(policy, checkname, config)
        self.log = logging.getLogger(__name__)

self.source = config.get(SOURCE_OPT)
        self.target = config.get(TARGET_OPT)
        self.tclass = config.get(CLASS_OPT)
        self.perms = config.get(PERMS_OPT)

self.exempt_source = config.get(EXEMPT_SRC_OPT)
        self.exempt_target = config.get(EXEMPT_TGT_OPT)
        self.expect_source = config.get(EXPECT_SRC_OPT)
        self.expect_target = config.get(EXPECT_TGT_OPT)

if not any((self.source, self.target, self.tclass, self.perms)):
            raise InvalidCheckValue(
                "At least one of source, target, tclass, or perms options must be set.")

source_exempt_expect_overlap = self.exempt_source & self.expect_source
        if source_exempt_expect_overlap:
            self.log.info("Overlap in expect_source and exempt_source: {}".
                          format(", ".join(i.name for i in source_exempt_expect_overlap)))

target_exempt_expect_overlap = self.exempt_target & self.expect_target
        if target_exempt_expect_overlap:
            self.log.info("Overlap in expect_target and exempt_target: {}".
                          format(", ".join(i.name for i in target_exempt_expect_overlap)))

def run(self) -> List:
        assert any((self.source, self.target, self.tclass, self.perms)), \
            "AssertTe no options set, this is a bug."

self.log.info("Checking TE allow rule assertion.")

query = TERuleQuery(self.policy,
                            source=self.source,
                            target=self.target,
                            tclass=self.tclass,
                            perms=self.perms,
                            ruletype=("allow",))

unseen_sources = set(self.expect_source)
        unseen_targets = set(self.expect_target)
        failures: List[Union[AnyTERule, str]] = []
        for rule in sorted(query.results()):
            srcs = set(rule.source.expand())
            tgts = set(rule.target.expand())

unseen_sources -= srcs
            unseen_targets -= tgts
            if (srcs - self.expect_source - self.exempt_source) and \
                    (tgts - self.expect_target - self.exempt_target):

self.log_fail(str(rule))
                failures.append(rule)
            else:
                self.log_ok(str(rule))

for item in unseen_sources:
            failure = "Expected rule with source \"{}\" not found.".format(item)
            self.log_fail(failure)
            failures.append(failure)

for item in unseen_targets:
            failure = "Expected rule with target \"{}\" not found.".format(item)
            self.log_fail(failure)
            failures.append(failure)

self.log.debug("{} failure(s)".format(failures))
        return failures

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2024-06-01 06:10:37
..	dir	-	root/root	drwxr-xr-x	2024-06-01 06:10:37
__pycache__	dir	-	root/root	drwxr-xr-x	2024-06-01 06:10:37
__init__.py	text/x-script.python	215 B	root/root	-rw-r--r--	2023-12-07 03:49:05
assertrbac.py	text/x-script.python	3.89 KB	root/root	-rw-r--r--	2023-12-07 03:49:05
assertte.py	text/x-script.python	4.39 KB	root/root	-rw-r--r--	2023-12-07 03:49:05
checker.py	text/x-script.python	5.22 KB	root/root	-rw-r--r--	2023-12-07 03:49:05
checkermodule.py	text/x-script.python	3.9 KB	root/root	-rw-r--r--	2023-12-07 03:49:05
descriptors.py	text/x-script.python	4.19 KB	root/root	-rw-r--r--	2023-12-07 03:49:05
emptyattr.py	text/x-script.python	2.71 KB	root/root	-rw-r--r--	2023-12-07 03:49:05
globalkeys.py	text/plain	301 B	root/root	-rw-r--r--	2023-12-07 03:49:05
roexec.py	text/x-script.python	3.53 KB	root/root	-rw-r--r--	2023-12-07 03:49:05
util.py	text/x-script.python	344 B	root/root	-rw-r--r--	2023-12-07 03:49:05