| # 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 . import compquery |
| from .descriptors import CriteriaDescriptor, CriteriaSetDescriptor |
| from .policyrep.exception import NoCommon |
| |
| |
| class ObjClassQuery(compquery.ComponentQuery): |
| |
| """ |
| Query object classes. |
| |
| Parameter: |
| policy The policy to query. |
| |
| Keyword Parameters/Class attributes: |
| name The name of the object set to match. |
| name_regex If true, regular expression matching will |
| be used for matching the name. |
| common The name of the inherited common to match. |
| common_regex If true, regular expression matching will |
| be used for matching the common name. |
| perms The permissions to match. |
| perms_equal If true, only commons with permission sets |
| that are equal to the criteria will |
| match. Otherwise, any intersection |
| will match. |
| perms_regex If true, regular expression matching |
| will be used on the permission names instead |
| of set logic. |
| comparison will not be used. |
| perms_indirect If false, permissions inherited from a common |
| permission set not will be evaluated. Default |
| is true. |
| """ |
| |
| common = CriteriaDescriptor("common_regex", "lookup_common") |
| common_regex = False |
| perms = CriteriaSetDescriptor("perms_regex") |
| perms_equal = False |
| perms_indirect = True |
| perms_regex = False |
| |
| def results(self): |
| """Generator which yields all matching object classes.""" |
| self.log.info("Generating results from {0.policy}".format(self)) |
| self.log.debug("Name: {0.name!r}, regex: {0.name_regex}".format(self)) |
| self.log.debug("Common: {0.common!r}, regex: {0.common_regex}".format(self)) |
| self.log.debug("Perms: {0.perms}, regex: {0.perms_regex}, " |
| "eq: {0.perms_equal}, indirect: {0.perms_indirect}".format(self)) |
| |
| for class_ in self.policy.classes(): |
| if not self._match_name(class_): |
| continue |
| |
| if self.common: |
| try: |
| if not self._match_regex( |
| class_.common, |
| self.common, |
| self.common_regex): |
| continue |
| except NoCommon: |
| continue |
| |
| if self.perms: |
| perms = class_.perms |
| |
| if self.perms_indirect: |
| try: |
| perms |= class_.common.perms |
| except NoCommon: |
| pass |
| |
| if not self._match_regex_or_set( |
| perms, |
| self.perms, |
| self.perms_equal, |
| self.perms_regex): |
| continue |
| |
| yield class_ |