/usr/lib/python3/dist-packages/setools/mlsrulequery.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 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 | # Copyright 2014-2015, 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/>.
#
import logging
from .descriptors import CriteriaDescriptor, CriteriaSetDescriptor
from .mixins import MatchObjClass
from .query import PolicyQuery
from .util import match_indirect_regex, match_range
class MLSRuleQuery(MatchObjClass, PolicyQuery):
"""
Query MLS rules.
Parameter:
policy The policy to query.
Keyword Parameters/Class attributes:
ruletype The list of rule type(s) to match.
source The name of the source type/attribute to match.
source_regex If true, regular expression matching will
be used on the source type/attribute.
target The name of the target type/attribute to match.
target_regex If true, regular expression matching will
be used on the target type/attribute.
tclass The object class(es) to match.
tclass_regex If true, use a regular expression for
matching the rule's object class.
"""
ruletype = CriteriaSetDescriptor(lookup_function="validate_mls_ruletype")
source = CriteriaDescriptor("source_regex", "lookup_type_or_attr")
source_regex = False
source_indirect = True
target = CriteriaDescriptor("target_regex", "lookup_type_or_attr")
target_regex = False
target_indirect = True
tclass = CriteriaSetDescriptor("tclass_regex", "lookup_class")
tclass_regex = False
default = CriteriaDescriptor(lookup_function="lookup_range")
default_overlap = False
default_subset = False
default_superset = False
default_proper = False
def __init__(self, policy, **kwargs):
super(MLSRuleQuery, self).__init__(policy, **kwargs)
self.log = logging.getLogger(__name__)
def results(self):
"""Generator which yields all matching MLS rules."""
self.log.info("Generating MLS rule results from {0.policy}".format(self))
self.log.debug("Ruletypes: {0.ruletype}".format(self))
self.log.debug("Source: {0.source!r}, indirect: {0.source_indirect}, "
"regex: {0.source_regex}".format(self))
self.log.debug("Target: {0.target!r}, indirect: {0.target_indirect}, "
"regex: {0.target_regex}".format(self))
self._match_object_class_debug(self.log)
self.log.debug("Default: {0.default!r}, overlap: {0.default_overlap}, "
"subset: {0.default_subset}, superset: {0.default_superset}, "
"proper: {0.default_proper}".format(self))
for rule in self.policy.mlsrules():
#
# Matching on rule type
#
if self.ruletype:
if rule.ruletype not in self.ruletype:
continue
#
# Matching on source type
#
if self.source and not match_indirect_regex(
rule.source,
self.source,
self.source_indirect,
self.source_regex):
continue
#
# Matching on target type
#
if self.target and not match_indirect_regex(
rule.target,
self.target,
self.target_indirect,
self.target_regex):
continue
#
# Matching on object class
#
if not self._match_object_class(rule):
continue
#
# Matching on range
#
if self.default and not match_range(
rule.default,
self.default,
self.default_subset,
self.default_overlap,
self.default_superset,
self.default_proper):
continue
# if we get here, we have matched all available criteria
yield rule
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