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# Copyright 2018 SUSE Linux GmbH
#
# 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.
"""Main entry point into the Application Credential service."""
from keystone.common import cache
from keystone.common import driver_hints
from keystone.common import manager
from keystone.common import provider_api
import keystone.conf
from keystone import exception
from keystone import notifications
CONF = keystone.conf.CONF
MEMOIZE = cache.get_memoization_decorator(group='application_credential')
PROVIDERS = provider_api.ProviderAPIs
class Manager(manager.Manager):
"""Default pivot point for the Application Credential backend.
See :mod:`keystone.common.manager.Manager` for more details on how this
dynamically calls the backend.
"""
driver_namespace = 'keystone.application_credential'
_provides_api = 'application_credential_api'
_APP_CRED = 'application_credential'
def __init__(self):
super(Manager, self).__init__(CONF.application_credential.driver)
self._register_callback_listeners()
def _register_callback_listeners(self):
notifications.register_event_callback(
notifications.ACTIONS.deleted, 'user',
self._delete_app_creds_on_user_delete_callback)
notifications.register_event_callback(
notifications.ACTIONS.disabled, 'user',
self._delete_app_creds_on_user_delete_callback)
notifications.register_event_callback(
notifications.ACTIONS.internal,
notifications.REMOVE_APP_CREDS_FOR_USER,
self._delete_app_creds_on_assignment_removal)
def _delete_app_creds_on_user_delete_callback(
self, service, resource_type, operation, payload):
user_id = payload['resource_info']
self._delete_application_credentials_for_user(user_id)
def _delete_app_creds_on_assignment_removal(
self, service, resource_type, operation, payload):
user_id = payload['resource_info']['user_id']
project_id = payload['resource_info']['project_id']
self._delete_application_credentials_for_user_on_project(user_id,
project_id)
def _get_user_roles(self, user_id, project_id):
assignment_list = self.assignment_api.list_role_assignments(
user_id=user_id,
project_id=project_id,
effective=True)
return list(set([x['role_id'] for x in assignment_list]))
def _require_user_has_role_in_project(self, roles, user_id, project_id):
user_roles = self._get_user_roles(user_id, project_id)
for role in roles:
if role['id'] not in user_roles:
raise exception.RoleAssignmentNotFound(role_id=role['id'],
actor_id=user_id,
target_id=project_id)
def _assert_limit_not_exceeded(self, user_id):
user_limit = CONF.application_credential.user_limit
if user_limit >= 0:
app_cred_count = len(self.list_application_credentials(user_id))
if app_cred_count >= user_limit:
raise exception.ApplicationCredentialLimitExceeded(
limit=user_limit)
def _get_role_list(self, app_cred_roles):
roles = []
for role in app_cred_roles:
roles.append(PROVIDERS.role_api.get_role(role['id']))
return roles
def authenticate(self, application_credential_id, secret):
"""Authenticate with an application credential.
:param str application_credential_id: Application Credential ID
:param str secret: Application Credential secret
"""
self.driver.authenticate(application_credential_id, secret)
def _process_app_cred(self, app_cred_ref):
app_cred_ref = app_cred_ref.copy()
app_cred_ref.pop('secret_hash')
app_cred_ref['roles'] = self._get_role_list(
app_cred_ref['roles'])
return app_cred_ref
def create_application_credential(self, application_credential,
initiator=None):
"""Create a new application credential.
:param dict application_credential: Application Credential data
:param initiator: CADF initiator
:returns: a new application credential
"""
application_credential = application_credential.copy()
user_id = application_credential['user_id']
project_id = application_credential['project_id']
roles = application_credential.pop('roles', [])
self._assert_limit_not_exceeded(user_id)
self._require_user_has_role_in_project(roles, user_id, project_id)
unhashed_secret = application_credential['secret']
ref = self.driver.create_application_credential(
application_credential, roles)
ref['secret'] = unhashed_secret
ref = self._process_app_cred(ref)
notifications.Audit.created(
self._APP_CRED,
application_credential['id'],
initiator)
return ref
@MEMOIZE
def get_application_credential(self, application_credential_id):
"""Get application credential details.
:param str application_credential_id: Application Credential ID
:returns: an application credential
"""
app_cred = self.driver.get_application_credential(
application_credential_id)
return self._process_app_cred(app_cred)
def list_application_credentials(self, user_id, hints=None):
"""List application credentials for a user.
:param str user_id: User ID
:param dict hints: Properties to filter on
:returns: a list of application credentials
"""
hints = hints or driver_hints.Hints()
app_cred_list = self.driver.list_application_credentials_for_user(
user_id, hints)
return [self._process_app_cred(app_cred) for app_cred in app_cred_list]
def delete_application_credential(self, application_credential_id,
initiator=None):
"""Delete an application credential.
:param str application_credential_id: Application Credential ID
:param initiator: CADF initiator
:raises keystone.exception.ApplicationCredentialNotFound: If the
application credential doesn't exist.
"""
self.driver.delete_application_credential(application_credential_id)
self.get_application_credential.invalidate(self,
application_credential_id)
notifications.Audit.deleted(
self._APP_CRED, application_credential_id, initiator)
def _delete_application_credentials_for_user(self, user_id):
"""Delete all application credentials for a user.
:param str user_id: User ID
This is triggered when a user is deleted.
"""
app_creds = self.driver.list_application_credentials_for_user(
user_id, driver_hints.Hints())
self.driver.delete_application_credentials_for_user(user_id)
for app_cred in app_creds:
self.get_application_credential.invalidate(self, app_cred['id'])
def _delete_application_credentials_for_user_on_project(self, user_id,
project_id):
"""Delete all application credentials for a user on a given project.
:param str user_id: User ID
:param str project_id: Project ID
This is triggered when a user loses a role assignment on a project.
"""
hints = driver_hints.Hints()
hints.add_filter('project_id', project_id)
app_creds = self.driver.list_application_credentials_for_user(
user_id, hints)
self.driver.delete_application_credentials_for_user_on_project(
user_id, project_id)
for app_cred in app_creds:
self.get_application_credential.invalidate(self, app_cred['id'])
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