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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2024-02-12 23:51
__init__.py	3.15 KB	-rw-r--r--	2020-04-01 14:57
bool.py	2.83 KB	-rw-r--r--	2020-04-01 14:57
bounds.py	4.1 KB	-rw-r--r--	2020-04-01 14:57
commons.py	2.82 KB	-rw-r--r--	2020-04-01 14:57
conditional.py	1.68 KB	-rw-r--r--	2020-04-01 14:57
constraints.py	8.64 KB	-rw-r--r--	2020-04-01 14:57
context.py	1.89 KB	-rw-r--r--	2020-04-01 14:57
default.py	4.14 KB	-rw-r--r--	2020-04-01 14:57
descriptors.py	1.6 KB	-rw-r--r--	2020-04-01 14:57
difference.py	5.66 KB	-rw-r--r--	2020-04-01 14:57
fsuse.py	3.11 KB	-rw-r--r--	2020-04-01 14:57
genfscon.py	3.25 KB	-rw-r--r--	2020-04-01 14:57
ibendportcon.py	3.28 KB	-rw-r--r--	2020-04-01 14:57
ibpkeycon.py	3.29 KB	-rw-r--r--	2020-04-01 14:57
initsid.py	2.48 KB	-rw-r--r--	2020-04-01 14:57
mls.py	10.31 KB	-rw-r--r--	2020-04-01 14:57
mlsrules.py	4.8 KB	-rw-r--r--	2020-04-01 14:57
netifcon.py	3.71 KB	-rw-r--r--	2020-04-01 14:57
nodecon.py	3.21 KB	-rw-r--r--	2020-04-01 14:57
objclass.py	3.6 KB	-rw-r--r--	2020-04-01 14:57
polcap.py	1.7 KB	-rw-r--r--	2020-04-01 14:57
portcon.py	3.19 KB	-rw-r--r--	2020-04-01 14:57
properties.py	2.33 KB	-rw-r--r--	2020-04-01 14:57
rbacrules.py	6.42 KB	-rw-r--r--	2020-04-01 14:57
roles.py	3.2 KB	-rw-r--r--	2020-04-01 14:57
terules.py	23.71 KB	-rw-r--r--	2020-04-01 14:57
typeattr.py	3.28 KB	-rw-r--r--	2020-04-01 14:57
types.py	4.86 KB	-rw-r--r--	2020-04-01 14:57
users.py	5.4 KB	-rw-r--r--	2020-04-01 14:57

Rename

# Copyright 2015, Tresys Technology, LLC
# Copyright 2018, Chris PeBenito <pebenito@ieee.org>
#
# This file is part of SETools.
#
# SETools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools.  If not, see
# <http://www.gnu.org/licenses/>.
#
from collections import defaultdict, namedtuple
from contextlib import suppress

from ..exception import NoCommon

from .descriptors import DiffResultDescriptor
from .difference import Difference, SymbolWrapper

modified_classes_record = namedtuple("modified_class", ["added_perms",
                                                        "removed_perms",
                                                        "matched_perms"])

_class_cache = defaultdict(dict)

def class_wrapper_factory(class_):
    """
    Wrap class from the specified policy.

This caches results to prevent duplicate wrapper
    objects in memory.
    """

try:
        return _class_cache[class_.policy][class_]
    except KeyError:
        c = SymbolWrapper(class_)
        _class_cache[class_.policy][class_] = c
        return c

class ObjClassDifference(Difference):

"""
    Determine the difference in object classes
    between two policies.
    """

added_classes = DiffResultDescriptor("diff_classes")
    removed_classes = DiffResultDescriptor("diff_classes")
    modified_classes = DiffResultDescriptor("diff_classes")

def diff_classes(self):
        """Generate the difference in object classes between the policies."""

self.log.info(
            "Generating class differences from {0.left_policy} to {0.right_policy}".format(self))

self.added_classes, self.removed_classes, matched_classes = self._set_diff(
            (SymbolWrapper(c) for c in self.left_policy.classes()),
            (SymbolWrapper(c) for c in self.right_policy.classes()))

self.modified_classes = dict()

for left_class, right_class in matched_classes:
            # Criteria for modified classes
            # 1. change to permissions (inherited common is expanded)

left_perms = left_class.perms
            with suppress(NoCommon):
                left_perms |= left_class.common.perms

right_perms = right_class.perms
            with suppress(NoCommon):
                right_perms |= right_class.common.perms

added_perms, removed_perms, matched_perms = self._set_diff(left_perms,
                                                                       right_perms,
                                                                       unwrap=False)

if added_perms or removed_perms:
                self.modified_classes[left_class] = modified_classes_record(added_perms,
                                                                            removed_perms,
                                                                            matched_perms)

#
    # Internal functions
    #
    def _reset_diff(self):
        """Reset diff results on policy changes."""
        self.log.debug("Resetting object class differences")
        self.added_classes = None
        self.removed_classes = None
        self.modified_classes = None