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Current Path : /proc/thread-self/root/lib64/python3.6/site-packages/setools/diff/ |
Current File : //proc/thread-self/root/lib64/python3.6/site-packages/setools/diff/default.py |
# Copyright 2016, Tresys Technology, LLC # # 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 namedtuple from .descriptors import DiffResultDescriptor from .difference import Difference, SymbolWrapper, Wrapper modified_default_record = namedtuple("modified_default", ["rule", "added_default", "removed_default", "added_default_range", "removed_default_range"]) class DefaultsDifference(Difference): """Determine the difference in default_* between two policies.""" added_defaults = DiffResultDescriptor("diff_defaults") removed_defaults = DiffResultDescriptor("diff_defaults") modified_defaults = DiffResultDescriptor("diff_defaults") def diff_defaults(self): """Generate the difference in type defaults between the policies.""" self.log.info( "Generating default_* differences from {0.left_policy} to {0.right_policy}". format(self)) self.added_defaults, self.removed_defaults, matched_defaults = self._set_diff( (DefaultWrapper(d) for d in self.left_policy.defaults()), (DefaultWrapper(d) for d in self.right_policy.defaults())) self.modified_defaults = [] for left_default, right_default in matched_defaults: # Criteria for modified defaults # 1. change to default setting # 2. change to default range if left_default.default != right_default.default: removed_default = left_default.default added_default = right_default.default else: removed_default = None added_default = None try: if left_default.default_range != right_default.default_range: removed_default_range = left_default.default_range added_default_range = right_default.default_range else: removed_default_range = None added_default_range = None except AttributeError: removed_default_range = None added_default_range = None if removed_default or removed_default_range: self.modified_defaults.append( modified_default_record(left_default, added_default, removed_default, added_default_range, removed_default_range)) # # Internal functions # def _reset_diff(self): """Reset diff results on policy changes.""" self.log.debug("Resetting default_* differences") self.added_defaults = None self.removed_defaults = None self.modified_defaults = None class DefaultWrapper(Wrapper): """Wrap default_* to allow comparisons.""" __slots__ = ("ruletype", "tclass") def __init__(self, default): self.origin = default self.ruletype = default.ruletype self.tclass = SymbolWrapper(default.tclass) self.key = hash(default) def __hash__(self): return self.key def __lt__(self, other): return self.key < other.key def __eq__(self, other): return self.ruletype == other.ruletype and \ self.tclass == other.tclass