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# Copyright 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/>.
#
# pylint: disable=attribute-defined-outside-init,no-member
import re
from .descriptors import CriteriaDescriptor, CriteriaSetDescriptor
class MatchAlias(object):
"""Mixin for matching an object's aliases."""
alias = CriteriaDescriptor("alias_regex")
alias_regex = False
def _match_alias(self, obj):
"""
Match the alias criteria
Parameter:
obj An object with an alias generator method named "aliases"
"""
if not self.alias:
# if there is no criteria, everything matches.
return True
return self._match_in_set(obj.aliases(), self.alias, self.alias_regex)
class MatchObjClass(object):
"""Mixin for matching an object's class."""
tclass = CriteriaSetDescriptor("tclass_regex", "lookup_class")
tclass_regex = False
def _match_object_class(self, obj):
"""
Match the object class criteria
Parameter:
obj An object with an object class attribute named "tclass"
"""
if not self.tclass:
# if there is no criteria, everything matches.
return True
elif self.tclass_regex:
return bool(self.tclass.search(str(obj.tclass)))
else:
return obj.tclass in self.tclass
class MatchPermission(object):
"""Mixin for matching an object's permissions."""
perms = CriteriaSetDescriptor("perms_regex")
perms_equal = False
perms_regex = False
perms_subset = False
def _match_perms(self, obj):
"""
Match the permission criteria
Parameter:
obj An object with a permission set class attribute named "perms"
"""
if not self.perms:
# if there is no criteria, everything matches.
return True
if self.perms_subset:
return obj.perms >= self.perms
else:
return self._match_regex_or_set(obj.perms, self.perms, self.perms_equal,
self.perms_regex)
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