Server IP : 92.204.138.22 / Your IP : 18.119.102.55 Web Server : Apache System : Linux ns1009439.ip-92-204-138.us 4.18.0-553.8.1.el8_10.x86_64 #1 SMP Tue Jul 2 07:26:33 EDT 2024 x86_64 User : internationaljou ( 1019) PHP Version : 7.4.33 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /usr/lib64/python3.6/site-packages/setools/diff/ |
Upload File : |
# 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 .descriptors import DiffResultDescriptor from .difference import Difference, SymbolWrapper from .typeattr import typeattr_wrapper_factory from ..policyrep import Type modified_types_record = namedtuple("modified_type", ["added_attributes", "removed_attributes", "matched_attributes", "modified_permissive", "permissive", "added_aliases", "removed_aliases", "matched_aliases"]) _types_cache = defaultdict(dict) def type_wrapper_factory(type_): """ Wrap types from the specified policy. This caches results to prevent duplicate wrapper objects in memory. """ try: return _types_cache[type_.policy][type_] except KeyError: t = SymbolWrapper(type_) _types_cache[type_.policy][type_] = t return t def type_or_attr_wrapper_factory(type_): """ Wrap types or attributes from the specified policy. This caches results to prevent duplicate wrapper objects in memory. """ if isinstance(type_, Type): return type_wrapper_factory(type_) else: return typeattr_wrapper_factory(type_) class TypesDifference(Difference): """Determine the difference in types between two policies.""" added_types = DiffResultDescriptor("diff_types") removed_types = DiffResultDescriptor("diff_types") modified_types = DiffResultDescriptor("diff_types") def diff_types(self): """Generate the difference in types between the policies.""" self.log.info( "Generating type differences from {0.left_policy} to {0.right_policy}".format(self)) self.added_types, self.removed_types, matched_types = self._set_diff( (SymbolWrapper(t) for t in self.left_policy.types()), (SymbolWrapper(t) for t in self.right_policy.types())) self.modified_types = dict() for left_type, right_type in matched_types: # Criteria for modified types # 1. change to attribute set, or # 2. change to alias set, or # 3. different permissive setting added_attr, removed_attr, matched_attr = self._set_diff( (SymbolWrapper(a) for a in left_type.attributes()), (SymbolWrapper(a) for a in right_type.attributes())) added_aliases, removed_aliases, matched_aliases = self._set_diff(left_type.aliases(), right_type.aliases(), unwrap=False) left_permissive = left_type.ispermissive right_permissive = right_type.ispermissive mod_permissive = left_permissive != right_permissive if added_attr or removed_attr or added_aliases or removed_aliases or mod_permissive: self.modified_types[left_type] = modified_types_record(added_attr, removed_attr, matched_attr, mod_permissive, left_permissive, added_aliases, removed_aliases, matched_aliases) # # Internal functions # def _reset_diff(self): """Reset diff results on policy changes.""" self.log.debug("Resetting type differences") self.added_types = None self.removed_types = None self.modified_types = None