# Copyright 2014-2015, Tresys Technology, LLC # # SPDX-License-Identifier: LGPL-2.1-only # import logging import re from typing import Iterable, Optional from .descriptors import CriteriaDescriptor from .mixins import MatchContext from .policyrep import Genfscon from .query import PolicyQuery from .util import match_regex class GenfsconQuery(MatchContext, PolicyQuery): """ Query genfscon statements. Parameter: policy The policy to query. Keyword Parameters/Class attributes: fs The criteria to match the file system type. fs_regex If true, regular expression matching will be used on the file system type. path The criteria to match the path. path_regex If true, regular expression matching will be used on the path. user The criteria to match the context's user. user_regex If true, regular expression matching will be used on the user. role The criteria to match the context's role. role_regex If true, regular expression matching will be used on the role. type_ The criteria to match the context's type. type_regex If true, regular expression matching will be used on the type. range_ The criteria to match the context's range. range_subset If true, the criteria will match if it is a subset of the context's range. range_overlap If true, the criteria will match if it overlaps any of the context's range. range_superset If true, the criteria will match if it is a superset of the context's range. range_proper If true, use proper superset/subset operations. No effect if not using set operations. """ filetype: Optional[int] = None fs = CriteriaDescriptor("fs_regex") fs_regex: bool = False path = CriteriaDescriptor("path_regex") path_regex: bool = False def __init__(self, policy, **kwargs) -> None: super(GenfsconQuery, self).__init__(policy, **kwargs) self.log = logging.getLogger(__name__) def results(self) -> Iterable[Genfscon]: """Generator which yields all matching genfscons.""" self.log.info("Generating genfscon results from {0.policy}".format(self)) self.log.debug("FS: {0.fs!r}, regex: {0.fs_regex}".format(self)) self.log.debug("Path: {0.path!r}, regex: {0.path_regex}".format(self)) self.log.debug("Filetype: {0.filetype!r}".format(self)) self._match_context_debug(self.log) for genfs in self.policy.genfscons(): if self.fs and not match_regex( genfs.fs, self.fs, self.fs_regex): continue if self.path and not match_regex( genfs.path, self.path, self.path_regex): continue if self.filetype and not self.filetype == genfs.filetype: continue if not self._match_context(genfs.context): continue yield genfs