273 lines
11 KiB
Python
273 lines
11 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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"""RequestContext: context for requests that persist through all of cinder."""
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import copy
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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_config import cfg
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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_log import log as logging
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from oslo_utils import timeutils
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import six
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from cinder import exception
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from cinder.i18n import _
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from cinder.objects import base as objects_base
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from cinder import policy
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context_opts = [
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cfg.StrOpt('cinder_internal_tenant_project_id',
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help='ID of the project which will be used as the Cinder '
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'internal tenant.'),
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cfg.StrOpt('cinder_internal_tenant_user_id',
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help='ID of the user to be used in volume operations as the '
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'Cinder internal tenant.'),
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]
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CONF = cfg.CONF
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CONF.register_opts(context_opts)
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LOG = logging.getLogger(__name__)
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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", project_name=None, remote_address=None,
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timestamp=None, quota_class=None, service_catalog=None,
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user_auth_plugin=None, **kwargs):
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"""Initialize RequestContext.
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:param read_deleted: 'no' indicates deleted records are hidden, 'yes'
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indicates deleted records are visible, 'only' indicates that
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*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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"""
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# NOTE(smcginnis): To keep it compatible for code using positional
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# args, explicityly set user_id and project_id in kwargs.
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kwargs.setdefault('user_id', user_id)
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kwargs.setdefault('project_id', project_id)
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super(RequestContext, self).__init__(is_admin=is_admin, **kwargs)
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self.project_name = project_name
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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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elif isinstance(timestamp, six.string_types):
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timestamp = timeutils.parse_isotime(timestamp)
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self.timestamp = timestamp
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self.quota_class = quota_class
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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
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('identity', 'compute', 'object-store',
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'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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# We need to have RequestContext attributes defined
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# when policy.check_is_admin invokes request logging
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# to make it loggable.
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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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elif self.is_admin and 'admin' not in self.roles:
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self.roles.append('admin')
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self.user_auth_plugin = user_auth_plugin
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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 _get_read_deleted(self):
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return self._read_deleted
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def _set_read_deleted(self, read_deleted):
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if read_deleted not in ('no', 'yes', 'only'):
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raise ValueError(_("read_deleted can only be one of 'no', "
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"'yes' or 'only', not %r") % read_deleted)
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self._read_deleted = read_deleted
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def _del_read_deleted(self):
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del self._read_deleted
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read_deleted = property(_get_read_deleted, _set_read_deleted,
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_del_read_deleted)
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def to_dict(self):
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result = super(RequestContext, self).to_dict()
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result['user_id'] = self.user_id
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result['project_id'] = self.project_id
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result['project_name'] = self.project_name
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result['domain_id'] = self.domain_id
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result['read_deleted'] = self.read_deleted
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result['remote_address'] = self.remote_address
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result['timestamp'] = self.timestamp.isoformat()
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result['quota_class'] = self.quota_class
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result['service_catalog'] = self.service_catalog
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result['request_id'] = self.request_id
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return result
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@classmethod
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def from_dict(cls, values):
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return cls(user_id=values.get('user_id'),
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project_id=values.get('project_id'),
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project_name=values.get('project_name'),
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domain_id=values.get('domain_id'),
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read_deleted=values.get('read_deleted'),
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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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request_id=values.get('request_id'),
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global_request_id=values.get('global_request_id'),
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is_admin=values.get('is_admin'),
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roles=values.get('roles'),
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auth_token=values.get('auth_token'),
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user_domain_id=values.get('user_domain'),
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project_domain_id=values.get('project_domain'),
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user_domain=values.get('user_domain'),
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project_domain=values.get('project_domain'),
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)
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def authorize(self, action, target=None, target_obj=None, fatal=True):
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"""Verifies that the given action is valid on the target in this context.
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:param action: string representing the action to be checked.
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:param target: dictionary representing the object of the action
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for object creation this should be a dictionary representing the
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location of the object e.g. ``{'project_id': context.project_id}``.
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If None, then this default target will be considered:
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{'project_id': self.project_id, 'user_id': self.user_id}
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:param: target_obj: dictionary representing the object which will be
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used to update target.
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:param fatal: if False, will return False when an
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exception.PolicyNotAuthorized occurs.
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:raises cinder.exception.NotAuthorized: if verification fails and fatal
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is True.
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:return: returns a non-False value (not necessarily "True") if
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authorized and False if not authorized and fatal is False.
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"""
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if target is None:
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target = {'project_id': self.project_id,
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'user_id': self.user_id}
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if isinstance(target_obj, objects_base.CinderObject):
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# Turn object into dict so target.update can work
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target.update(
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target_obj.obj_to_primitive()['versioned_object.data'] or {})
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else:
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target.update(target_obj or {})
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return policy.authorize(self, action, target, do_raise=fatal,
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exc=exception.PolicyNotAuthorized)
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def to_policy_values(self):
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policy = super(RequestContext, self).to_policy_values()
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policy['is_admin'] = self.is_admin
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return policy
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def elevated(self, read_deleted=None, overwrite=False):
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"""Return a version of this context with admin flag set."""
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context = self.deepcopy()
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context.is_admin = True
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if 'admin' not in context.roles:
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context.roles.append('admin')
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if read_deleted is not None:
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context.read_deleted = read_deleted
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return context
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def deepcopy(self):
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return copy.deepcopy(self)
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def get_admin_context(read_deleted="no"):
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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 get_internal_tenant_context():
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"""Build and return the Cinder internal tenant context object
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This request context will only work for internal Cinder operations. It will
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not be able to make requests to remote services. To do so it will need to
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use the keystone client to get an auth_token.
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"""
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project_id = CONF.cinder_internal_tenant_project_id
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user_id = CONF.cinder_internal_tenant_user_id
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if project_id and user_id:
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return RequestContext(user_id=user_id,
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project_id=project_id,
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is_admin=True,
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overwrite=False)
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else:
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LOG.warning('Unable to get internal tenant context: Missing '
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'required config parameters.')
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return None
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