mirror of
https://github.com/SELinuxProject/setools
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102 lines
3.6 KiB
Python
102 lines
3.6 KiB
Python
# Copyright 2014-2015, Tresys Technology, LLC
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#
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# This file is part of SETools.
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#
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# SETools is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation, either version 2.1 of
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# the License, or (at your option) any later version.
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#
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# SETools is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with SETools. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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import logging
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import re
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from . import compquery
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from .descriptors import CriteriaDescriptor, CriteriaSetDescriptor
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from .policyrep.exception import NoCommon
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class ObjClassQuery(compquery.ComponentQuery):
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"""
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Query object classes.
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Parameter:
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policy The policy to query.
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Keyword Parameters/Class attributes:
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name The name of the object set to match.
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name_regex If true, regular expression matching will
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be used for matching the name.
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common The name of the inherited common to match.
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common_regex If true, regular expression matching will
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be used for matching the common name.
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perms The permissions to match.
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perms_equal If true, only commons with permission sets
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that are equal to the criteria will
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match. Otherwise, any intersection
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will match.
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perms_regex If true, regular expression matching
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will be used on the permission names instead
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of set logic.
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comparison will not be used.
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perms_indirect If false, permissions inherited from a common
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permission set not will be evaluated. Default
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is true.
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"""
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common = CriteriaDescriptor("common_regex", "lookup_common")
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common_regex = False
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perms = CriteriaSetDescriptor("perms_regex")
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perms_equal = False
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perms_indirect = True
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perms_regex = False
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def results(self):
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"""Generator which yields all matching object classes."""
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self.log.info("Generating results from {0.policy}".format(self))
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self.log.debug("Name: {0.name!r}, regex: {0.name_regex}".format(self))
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self.log.debug("Common: {0.common!r}, regex: {0.common_regex}".format(self))
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self.log.debug("Perms: {0.perms}, regex: {0.perms_regex}, "
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"eq: {0.perms_equal}, indirect: {0.perms_indirect}".format(self))
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for class_ in self.policy.classes():
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if not self._match_name(class_):
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continue
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if self.common:
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try:
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if not self._match_regex(
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class_.common,
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self.common,
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self.common_regex):
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continue
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except NoCommon:
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continue
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if self.perms:
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perms = class_.perms
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if self.perms_indirect:
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try:
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perms |= class_.common.perms
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except NoCommon:
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pass
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if not self._match_regex_or_set(
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perms,
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self.perms,
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self.perms_equal,
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self.perms_regex):
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continue
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yield class_
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