| # 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 |
| import re |
| |
| from .descriptors import CriteriaSetDescriptor |
| from .mixins import MatchName |
| from .query import PolicyQuery |
| from .util import match_regex_or_set |
| |
| |
| class TypeAttributeQuery(MatchName, PolicyQuery): |
| |
| """ |
| Query SELinux policy type attributes. |
| |
| Parameter: |
| policy The policy to query. |
| |
| Keyword Parameters/Class attributes: |
| name The type name to match. |
| name_regex If true, regular expression matching |
| will be used on the type names. |
| types The type to match. |
| types_equal If true, only attributes with type sets |
| that are equal to the criteria will |
| match. Otherwise, any intersection |
| will match. |
| types_regex If true, regular expression matching |
| will be used on the type names instead |
| of set logic. |
| """ |
| |
| types = CriteriaSetDescriptor("types_regex", "lookup_type") |
| types_equal = False |
| types_regex = False |
| |
| def __init__(self, policy, **kwargs): |
| super(TypeAttributeQuery, self).__init__(policy, **kwargs) |
| self.log = logging.getLogger(__name__) |
| |
| def results(self): |
| """Generator which yields all matching types.""" |
| self.log.info("Generating type attribute results from {0.policy}".format(self)) |
| self._match_name_debug(self.log) |
| self.log.debug("Types: {0.types!r}, regex: {0.types_regex}, " |
| "eq: {0.types_equal}".format(self)) |
| |
| for attr in self.policy.typeattributes(): |
| if not self._match_name(attr): |
| continue |
| |
| if self.types and not match_regex_or_set( |
| set(attr.expand()), |
| self.types, |
| self.types_equal, |
| self.types_regex): |
| continue |
| |
| yield attr |