/usr/lib/python3/dist-packages/setools/diff/genfscon.py is in python3-setools 4.0.1-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | # 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_genfs_record = namedtuple("modified_genfs", ["rule",
"added_context",
"removed_context"])
class GenfsconsDifference(Difference):
"""Determine the difference in genfscon rules between two policies."""
added_genfscons = DiffResultDescriptor("diff_genfscons")
removed_genfscons = DiffResultDescriptor("diff_genfscons")
modified_genfscons = DiffResultDescriptor("diff_genfscons")
def diff_genfscons(self):
"""Generate the difference in genfscon rules between the policies."""
self.log.info(
"Generating genfscon differences from {0.left_policy} to {0.right_policy}".
format(self))
self.added_genfscons, self.removed_genfscons, matched = self._set_diff(
(GenfsconWrapper(fs) for fs in self.left_policy.genfscons()),
(GenfsconWrapper(fs) for fs in self.right_policy.genfscons()))
self.modified_genfscons = []
for left_rule, right_rule in matched:
# Criteria for modified rules
# 1. change to context
if ContextWrapper(left_rule.context) != ContextWrapper(right_rule.context):
self.modified_genfscons.append(modified_genfs_record(left_rule,
right_rule.context,
left_rule.context))
#
# Internal functions
#
def _reset_diff(self):
"""Reset diff results on policy changes."""
self.log.debug("Resetting genfscon rule differences")
self.added_genfscons = None
self.removed_genfscons = None
self.modified_genfscons = None
class GenfsconWrapper(Wrapper):
"""Wrap genfscon rules to allow set operations."""
def __init__(self, rule):
self.origin = rule
self.fs = rule.fs
self.path = rule.path
self.filetype = rule.filetype
self.context = ContextWrapper(rule.context)
self.key = hash(rule)
def __hash__(self):
return self.key
def __lt__(self, other):
return self.key < other.key
def __eq__(self, other):
return self.fs == other.fs and \
self.path == other.path and \
self.filetype == other.filetype
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