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//lib64/python3.6/site-packages/setools/mlsrulequery.py

# 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 .policyrep import MLSRuletype
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(enum_class=MLSRuletype)
    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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diff DIR	-	drwxr-xr-x	2025-03-30 04:21:30	Edit Download recursive recursive
__pycache__ DIR	-	drwxr-xr-x	2025-03-30 04:21:30	Edit Download recursive recursive
boolquery.py	2.19 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
boundsquery.py	2.35 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
categoryquery.py	1.88 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
commonquery.py	2.11 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
constraintquery.py	5.50 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
defaultquery.py	2.80 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
descriptors.py	7.47 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
devicetreeconquery.py	2.72 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
dta.py	21.40 KB	lrw-r--r--	2023-10-15 02:31:39	Edit Download recursive recursive
exception.py	5.97 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
fsusequery.py	3.36 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
genfsconquery.py	3.68 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
ibendportconquery.py	3.52 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
ibpkeyconquery.py	5.22 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
infoflow.py	14.59 KB	lrw-r--r--	2023-10-15 02:31:39	Edit Download recursive recursive
initsidquery.py	2.79 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
iomemconquery.py	4.44 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
ioportconquery.py	4.46 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
mixins.py	7.14 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
mlsrulequery.py	4.59 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
netifconquery.py	2.93 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
nodeconquery.py	4.16 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
objclassquery.py	3.78 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
pcideviceconquery.py	3.04 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
permmap.py	16.10 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
perm_map	87.16 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
pirqconquery.py	2.95 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
polcapquery.py	1.64 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
policyrep.cpython-36m-x86_64-linux-gnu.so	1.87 MB	lrwxr-xr-x	2023-10-15 02:32:32	Edit Download recursive recursive
portconquery.py	5.04 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
query.py	1.69 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
rbacrulequery.py	5.61 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
rolequery.py	2.48 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
sensitivityquery.py	2.65 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
terulequery.py	9.11 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
typeattrquery.py	2.62 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
typequery.py	3.43 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
userquery.py	4.68 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
util.py	5.32 KB	lrw-r--r--	2020-04-01 14:57:49	Edit Download recursive recursive
__init__.py	2.79 KB	lrw-r--r--	2023-10-15 02:31:39	Edit Download recursive recursive