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# 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
from .mixins import MatchContext, MatchName
from .query import PolicyQuery
class InitialSIDQuery(MatchName, MatchContext, PolicyQuery):
"""
Initial SID (Initial context) query.
Parameter:
policy The policy to query.
Keyword Parameters/Class attributes:
name The Initial SID name to match.
name_regex If true, regular expression matching
will be used on the Initial SID name.
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.
"""
def __init__(self, policy, **kwargs):
super(InitialSIDQuery, self).__init__(policy, **kwargs)
self.log = logging.getLogger(__name__)
def results(self):
"""Generator which yields all matching initial SIDs."""
self.log.info("Generating initial SID results from {0.policy}".format(self))
self._match_name_debug(self.log)
self._match_context_debug(self.log)
for i in self.policy.initialsids():
if not self._match_name(i):
continue
if not self._match_context(i.context):
continue
yield i