1 # Copyright 2014, Tresys Technology, LLC 2 # 3 # This file is part of SETools. 4 # 5 # SETools is free software: you can redistribute it and/or modify 6 # it under the terms of the GNU Lesser General Public License as 7 # published by the Free Software Foundation, either version 2.1 of 8 # the License, or (at your option) any later version. 9 # 10 # SETools is distributed in the hope that it will be useful, 11 # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 # GNU Lesser General Public License for more details. 14 # 15 # You should have received a copy of the GNU Lesser General Public 16 # License along with SETools. If not, see 17 # <http://www.gnu.org/licenses/>. 18 # 19 from . import exception 20 from . import qpol 21 from . import symbol 22 from . import context 23 24 25 def initialsid_factory(policy, name): 26 """Factory function for creating initial sid objects.""" 27 28 if isinstance(name, InitialSID): 29 assert name.policy == policy 30 return name 31 elif isinstance(name, qpol.qpol_isid_t): 32 return InitialSID(policy, name) 33 34 try: 35 return InitialSID(policy, qpol.qpol_isid_t(policy, name)) 36 except ValueError: 37 raise exception.InvalidInitialSid("{0} is not a valid initial sid".format(name)) 38 39 40 class InitialSID(symbol.PolicySymbol): 41 42 """An initial SID statement.""" 43 44 @property 45 def context(self): 46 """The context for this initial SID.""" 47 return context.context_factory(self.policy, self.qpol_symbol.context(self.policy)) 48 49 def statement(self): 50 return "sid {0} {0.context}".format(self) 51
