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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Kerberos authentication plugins.
.. warning::
This module requires installation of an extra package (`requests_kerberos`)
not installed by default. Without the extra package an import error will
occur. The extra package can be installed using::
$ pip install keystoneauth['kerberos']
"""
import requests_kerberos
from keystoneauth1 import access
from keystoneauth1.identity import v3
from keystoneauth1.identity.v3 import federation
def _requests_auth():
# NOTE(jamielennox): request_kerberos.OPTIONAL allows the plugin to accept
# unencrypted error messages where we can't verify the origin of the error
# because we aren't authenticated.
return requests_kerberos.HTTPKerberosAuth(
mutual_authentication=requests_kerberos.OPTIONAL)
class KerberosMethod(v3.AuthMethod):
_method_parameters = []
def get_auth_data(self, session, auth, headers, request_kwargs, **kwargs):
# NOTE(jamielennox): request_kwargs is passed as a kwarg however it is
# required and always present when called from keystoneclient.
request_kwargs['requests_auth'] = _requests_auth()
return 'kerberos', {}
class Kerberos(v3.AuthConstructor):
_auth_method_class = KerberosMethod
class MappedKerberos(federation.FederationBaseAuth):
"""Authenticate using Kerberos via the keystone federation mechanisms.
This uses the OS-FEDERATION extension to gain an unscoped token and then
use the standard keystone auth process to scope that to any given project.
"""
def get_unscoped_auth_ref(self, session, **kwargs):
resp = session.get(self.federated_token_url,
requests_auth=_requests_auth(),
authenticated=False)
return access.create(body=resp.json(), resp=resp)
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