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Name	Size	Permission
__pycache__	[ DIR ]	drwxr-xr-x
__init__.py	2.52 KB	-rw-r--r--
bool.py	2.43 KB	-rw-r--r--
bounds.py	3.69 KB	-rw-r--r--
commons.py	2.15 KB	-rw-r--r--
conditional.py	1.23 KB	-rw-r--r--
constraints.py	8.2 KB	-rw-r--r--
context.py	1.36 KB	-rw-r--r--
default.py	3.54 KB	-rw-r--r--
descriptors.py	1.04 KB	-rw-r--r--
difference.py	5.36 KB	-rw-r--r--
fsuse.py	2.49 KB	-rw-r--r--
genfscon.py	2.66 KB	-rw-r--r--
ibendportcon.py	2.58 KB	-rw-r--r--
ibpkeycon.py	2.59 KB	-rw-r--r--
initsid.py	1.95 KB	-rw-r--r--
mls.py	9.91 KB	-rw-r--r--
mlsrules.py	4.55 KB	-rw-r--r--
netifcon.py	3.05 KB	-rw-r--r--
nodecon.py	2.59 KB	-rw-r--r--
objclass.py	3.08 KB	-rw-r--r--
polcap.py	1.09 KB	-rw-r--r--
portcon.py	2.57 KB	-rw-r--r--
properties.py	1.78 KB	-rw-r--r--
rbacrules.py	6.4 KB	-rw-r--r--
roles.py	2.66 KB	-rw-r--r--
terules.py	24.09 KB	-rw-r--r--
typeattr.py	2.8 KB	-rw-r--r--
types.py	4.17 KB	-rw-r--r--
typing.py	458 B	-rw-r--r--
users.py	5.35 KB	-rw-r--r--

Code Editor : typeattr.py

# Copyright 2016, Tresys Technology, LLC
# Copyright 2018, Chris PeBenito <pebenito@ieee.org>
#
# SPDX-License-Identifier: LGPL-2.1-only
#
from collections import defaultdict
from typing import NamedTuple, Set

from ..policyrep import Type, TypeAttribute

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

_typeattr_cache: SymbolCache[TypeAttribute] = defaultdict(dict)

class ModifiedTypeAttribute(NamedTuple):

"""Difference details for a modified type attribute."""

added_types: Set[Type]
    removed_types: Set[Type]
    matched_types: Set[Type]

def typeattr_wrapper_factory(attr: TypeAttribute) -> SymbolWrapper[TypeAttribute]:
    """
    Wrap type attributes from the specified policy.

This caches results to prevent duplicate wrapper
    objects in memory.
    """
    try:
        return _typeattr_cache[attr.policy][attr]
    except KeyError:
        a = SymbolWrapper(attr)
        _typeattr_cache[attr.policy][attr] = a
        return a

class TypeAttributesDifference(Difference):

"""Determine the difference in type attributes between two policies."""

added_type_attributes = DiffResultDescriptor("diff_type_attributes")
    removed_type_attributes = DiffResultDescriptor("diff_type_attributes")
    modified_type_attributes = DiffResultDescriptor("diff_type_attributes")

def diff_type_attributes(self) -> None:
        """Generate the difference in type attributes between the policies."""

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

self.added_type_attributes, self.removed_type_attributes, matched_attributes = \
            self._set_diff(
                (SymbolWrapper(r) for r in self.left_policy.typeattributes()),
                (SymbolWrapper(r) for r in self.right_policy.typeattributes()))

self.modified_type_attributes = dict()

for left_attribute, right_attribute in matched_attributes:
            # Criteria for modified attributes
            # 1. change to type set
            added_types, removed_types, matched_types = self._set_diff(
                (SymbolWrapper(t) for t in left_attribute.expand()),
                (SymbolWrapper(t) for t in right_attribute.expand()))

if added_types or removed_types:
                self.modified_type_attributes[left_attribute] = ModifiedTypeAttribute(
                    added_types, removed_types, matched_types)

#
    # Internal functions
    #
    def _reset_diff(self) -> None:
        """Reset diff results on policy changes."""
        self.log.debug("Resetting type attribute differences")
        self.added_type_attributes = None
        self.removed_type_attributes = None
        self.modified_type_attributes = None

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Code Editor : typeattr.py