217 lines
8.3 KiB
Python
217 lines
8.3 KiB
Python
# Copyright 2011 OpenStack Foundation
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from keystoneauth1.access import service_catalog as ksa_service_catalog
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from keystoneauth1 import plugin
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from oslo_context import context
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from oslo_db.sqlalchemy import enginefacade
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from oslo_utils import timeutils
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from cyborg.common import exception
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from cyborg.common import utils
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class _ContextAuthPlugin(plugin.BaseAuthPlugin):
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"""A keystoneauth auth plugin that uses the values from the Context.
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Ideally we would use the plugin provided by auth_token middleware however
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this plugin isn't serialized yet so we construct one from the serialized
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auth data.
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"""
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def __init__(self, auth_token, sc):
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super(_ContextAuthPlugin, self).__init__()
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self.auth_token = auth_token
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self.service_catalog = ksa_service_catalog.ServiceCatalogV2(sc)
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def get_token(self, *args, **kwargs):
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return self.auth_token
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def get_endpoint(self, session, service_type=None, interface=None,
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region_name=None, service_name=None, **kwargs):
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return self.service_catalog.url_for(service_type=service_type,
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service_name=service_name,
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interface=interface,
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region_name=region_name)
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@enginefacade.transaction_context_provider
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class RequestContext(context.RequestContext):
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"""Security context and request information.
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Represents the user taking a given action within the system.
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"""
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def __init__(self, user_id=None, project_id=None, is_admin=None,
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read_deleted="no", remote_address=None, timestamp=None,
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quota_class=None, service_catalog=None,
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user_auth_plugin=None, **kwargs):
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""":param read_deleted: 'no' indicates deleted records are hidden,
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'yes' indicates deleted records are visible,
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'only' indicates that *only* deleted records are visible.
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:param overwrite: Set to False to ensure that the greenthread local
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copy of the index is not overwritten.
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:param instance_lock_checked: This is not used and will be removed
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in a future release.
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:param user_auth_plugin: The auth plugin for the current request's
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authentication data.
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"""
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if user_id:
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kwargs['user_id'] = user_id
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if project_id:
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kwargs['project_id'] = project_id
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super(RequestContext, self).__init__(is_admin=is_admin, **kwargs)
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self.read_deleted = read_deleted
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self.remote_address = remote_address
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if not timestamp:
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timestamp = timeutils.utcnow()
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if isinstance(timestamp, str):
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timestamp = timeutils.parse_strtime(timestamp)
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self.timestamp = timestamp
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if service_catalog:
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# Only include required parts of service_catalog
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self.service_catalog = [s for s in service_catalog
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if s.get('type') in ('image')]
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else:
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# if list is empty or none
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self.service_catalog = []
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self.user_auth_plugin = user_auth_plugin
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# if self.is_admin is None:
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# self.is_admin = policy.check_is_admin(self)
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def get_auth_plugin(self):
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if self.user_auth_plugin:
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return self.user_auth_plugin
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else:
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return _ContextAuthPlugin(self.auth_token, self.service_catalog)
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def to_dict(self):
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values = super(RequestContext, self).to_dict()
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# FIXME(dims): defensive hasattr() checks need to be
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# removed once we figure out why we are seeing stack
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# traces
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values.update({
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'user_id': getattr(self, 'user_id', None),
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'project_id': getattr(self, 'project_id', None),
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'is_admin': getattr(self, 'is_admin', None),
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'read_deleted': getattr(self, 'read_deleted', 'no'),
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'remote_address': getattr(self, 'remote_address', None),
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'timestamp': utils.strtime(self.timestamp) if hasattr(
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self, 'timestamp') else None,
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'request_id': getattr(self, 'request_id', None),
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'quota_class': getattr(self, 'quota_class', None),
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'user_name': getattr(self, 'user_name', None),
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'service_catalog': getattr(self, 'service_catalog', None),
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'project_name': getattr(self, 'project_name', None),
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})
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# NOTE(tonyb): This can be removed once we're certain to have a
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# RequestContext contains 'is_admin_project', We can only get away with
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# this because we "know" the default value of 'is_admin_project' which
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# is very fragile.
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values.update({
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'is_admin_project': getattr(self, 'is_admin_project', True),
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})
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return values
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@classmethod
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def from_dict(cls, values):
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return super(RequestContext, cls).from_dict(
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values,
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user_id=values.get('user_id'),
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project_id=values.get('project_id'),
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# TODO(sdague): oslo.context has show_deleted, if
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# possible, we should migrate to that in the future so we
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# don't need to be different here.
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read_deleted=values.get('read_deleted', 'no'),
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remote_address=values.get('remote_address'),
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timestamp=values.get('timestamp'),
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quota_class=values.get('quota_class'),
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service_catalog=values.get('service_catalog'),
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)
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def get_context():
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"""A helper method to get a blank context.
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Note that overwrite is False here so this context will not update the
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greenthread-local stored context that is used when logging.
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"""
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return RequestContext(user_id=None,
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project_id=None,
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is_admin=False,
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overwrite=False)
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def get_admin_context(read_deleted="no"):
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# NOTE(alaski): This method should only be used when an admin context is
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# necessary for the entirety of the context lifetime. If that's not the
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# case please use get_context(), or create the RequestContext manually, and
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# use context.elevated() where necessary. Some periodic tasks may use
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# get_admin_context so that their database calls are not filtered on
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# project_id.
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return RequestContext(user_id=None,
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project_id=None,
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is_admin=True,
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read_deleted=read_deleted,
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overwrite=False)
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def is_user_context(context):
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"""Indicates if the request context is a normal user."""
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if not context:
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return False
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if context.is_admin:
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return False
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if not context.user_id or not context.project_id:
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return False
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return True
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def require_context(ctxt):
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"""Raise exception.Forbidden() if context is not a user or an
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admin context.
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"""
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if not ctxt.is_admin and not is_user_context(ctxt):
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raise exception.Forbidden()
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def authorize_project_context(context, project_id):
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"""Ensures a request has permission to access the given project."""
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if is_user_context(context):
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if not context.project_id:
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raise exception.Forbidden()
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elif context.project_id != project_id:
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raise exception.Forbidden()
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def authorize_user_context(context, user_id):
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"""Ensures a request has permission to access the given user."""
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if is_user_context(context):
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if not context.user_id:
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raise exception.Forbidden()
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elif context.user_id != user_id:
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raise exception.Forbidden()
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