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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/>.
#
from . import exception
from . import qpol
from . import symbol
from . import user
from . import role
from . import typeattr
from . import mls
def context_factory(policy, name):
"""Factory function for creating context objects."""
if not isinstance(name, qpol.qpol_context_t):
raise TypeError("Contexts cannot be looked-up.")
return Context(policy, name)
class Context(symbol.PolicySymbol):
"""A SELinux security context/security attribute."""
def __str__(self):
try:
return "{0.user}:{0.role}:{0.type_}:{0.range_}".format(self)
except exception.MLSDisabled:
return "{0.user}:{0.role}:{0.type_}".format(self)
@property
def user(self):
"""The user portion of the context."""
return user.user_factory(self.policy, self.qpol_symbol.user(self.policy))
@property
def role(self):
"""The role portion of the context."""
return role.role_factory(self.policy, self.qpol_symbol.role(self.policy))
@property
def type_(self):
"""The type portion of the context."""
return typeattr.type_factory(self.policy, self.qpol_symbol.type_(self.policy))
@property
def range_(self):
"""The MLS range of the context."""
return mls.range_factory(self.policy, self.qpol_symbol.range(self.policy))
def statement(self):
raise exception.NoStatement
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