????
Current Path : /proc/thread-self/root/proc/thread-self/root/lib64/python3.6/site-packages/setools/diff/ |
Current File : //proc/thread-self/root/proc/thread-self/root/lib64/python3.6/site-packages/setools/diff/portcon.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 .context import ContextWrapper from .descriptors import DiffResultDescriptor from .difference import Difference, Wrapper modified_portcon_record = namedtuple("modified_portcon", ["rule", "added_context", "removed_context"]) class PortconsDifference(Difference): """Determine the difference in portcons between two policies.""" added_portcons = DiffResultDescriptor("diff_portcons") removed_portcons = DiffResultDescriptor("diff_portcons") modified_portcons = DiffResultDescriptor("diff_portcons") def diff_portcons(self): """Generate the difference in portcons between the policies.""" self.log.info("Generating portcon differences from {0.left_policy} to {0.right_policy}". format(self)) self.added_portcons, self.removed_portcons, matched_portcons = self._set_diff( (PortconWrapper(n) for n in self.left_policy.portcons()), (PortconWrapper(n) for n in self.right_policy.portcons())) self.modified_portcons = [] for left_portcon, right_portcon in matched_portcons: # Criteria for modified portcons # 1. change to context if ContextWrapper(left_portcon.context) != ContextWrapper(right_portcon.context): self.modified_portcons.append(modified_portcon_record(left_portcon, right_portcon.context, left_portcon.context)) # # Internal functions # def _reset_diff(self): """Reset diff results on policy changes.""" self.log.debug("Resetting portcon differences") self.added_portcons = None self.removed_portcons = None self.modified_portcons = None class PortconWrapper(Wrapper): """Wrap portcon statements for diff purposes.""" __slots__ = ("protocol", "low", "high") def __init__(self, ocon): self.origin = ocon self.protocol = ocon.protocol self.low, self.high = ocon.ports self.key = hash(ocon) def __hash__(self): return self.key def __lt__(self, other): return self.origin < other.origin def __eq__(self, other): return self.protocol == other.protocol and \ self.low == other.low and \ self.high == other.high