685 lines
28 KiB
Python
685 lines
28 KiB
Python
# Copyright 2013 OpenStack Foundation
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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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import sys
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from keystoneclient.common import cms
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from oslo_log import log
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from oslo_log import versionutils
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from oslo_serialization import jsonutils
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from oslo_utils import importutils
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import six
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import stevedore
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from keystone.common import controller
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from keystone.common import dependency
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from keystone.common import utils
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from keystone.common import wsgi
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import keystone.conf
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from keystone import exception
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from keystone.federation import constants
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from keystone.i18n import _, _LI, _LW
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from keystone.resource import controllers as resource_controllers
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LOG = log.getLogger(__name__)
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CONF = keystone.conf.CONF
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# registry of authentication methods
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AUTH_METHODS = {}
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AUTH_PLUGINS_LOADED = False
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def load_auth_method(method):
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plugin_name = CONF.auth.get(method) or 'default'
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namespace = 'keystone.auth.%s' % method
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try:
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driver_manager = stevedore.DriverManager(namespace, plugin_name,
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invoke_on_load=True)
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return driver_manager.driver
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except RuntimeError:
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LOG.debug('Failed to load the %s driver (%s) using stevedore, will '
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'attempt to load using import_object instead.',
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method, plugin_name)
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driver = importutils.import_object(plugin_name)
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msg = (_(
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'Direct import of auth plugin %(name)r is deprecated as of Liberty in '
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'favor of its entrypoint from %(namespace)r and may be removed in '
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'N.') %
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{'name': plugin_name, 'namespace': namespace})
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versionutils.report_deprecated_feature(LOG, msg)
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return driver
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def load_auth_methods():
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global AUTH_PLUGINS_LOADED
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if AUTH_PLUGINS_LOADED:
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# Only try and load methods a single time.
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return
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# config.setup_authentication should be idempotent, call it to ensure we
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# have setup all the appropriate configuration options we may need.
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keystone.conf.auth.setup_authentication()
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for plugin in set(CONF.auth.methods):
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AUTH_METHODS[plugin] = load_auth_method(plugin)
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AUTH_PLUGINS_LOADED = True
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def get_auth_method(method_name):
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global AUTH_METHODS
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if method_name not in AUTH_METHODS:
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raise exception.AuthMethodNotSupported()
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return AUTH_METHODS[method_name]
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class AuthContext(dict):
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"""Retrofitting auth_context to reconcile identity attributes.
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The identity attributes must not have conflicting values among the
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auth plug-ins. The only exception is `expires_at`, which is set to its
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earliest value.
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"""
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# identity attributes need to be reconciled among the auth plugins
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IDENTITY_ATTRIBUTES = frozenset(['user_id', 'project_id',
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'access_token_id', 'domain_id',
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'expires_at'])
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def __setitem__(self, key, val):
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"""Override __setitem__ to prevent conflicting values."""
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if key in self.IDENTITY_ATTRIBUTES and key in self:
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existing_val = self[key]
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if key == 'expires_at':
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# special treatment for 'expires_at', we are going to take
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# the earliest expiration instead.
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if existing_val != val:
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LOG.info(_LI('"expires_at" has conflicting values '
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'%(existing)s and %(new)s. Will use the '
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'earliest value.'),
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{'existing': existing_val, 'new': val})
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if existing_val is None or val is None:
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val = existing_val or val
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else:
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val = min(existing_val, val)
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elif existing_val != val:
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msg = _('Unable to reconcile identity attribute %(attribute)s '
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'as it has conflicting values %(new)s and %(old)s') % (
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{'attribute': key,
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'new': val,
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'old': existing_val})
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raise exception.Unauthorized(msg)
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return super(AuthContext, self).__setitem__(key, val)
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@dependency.requires('resource_api', 'trust_api')
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class AuthInfo(object):
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"""Encapsulation of "auth" request."""
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@staticmethod
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def create(context, auth=None, scope_only=False):
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auth_info = AuthInfo(context, auth=auth)
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auth_info._validate_and_normalize_auth_data(scope_only)
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return auth_info
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def __init__(self, context, auth=None):
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self.context = context
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self.auth = auth
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self._scope_data = (None, None, None, None)
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# self._scope_data is (domain_id, project_id, trust_ref, unscoped)
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# project scope: (None, project_id, None, None)
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# domain scope: (domain_id, None, None, None)
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# trust scope: (None, None, trust_ref, None)
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# unscoped: (None, None, None, 'unscoped')
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def _assert_project_is_enabled(self, project_ref):
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# ensure the project is enabled
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try:
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self.resource_api.assert_project_enabled(
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project_id=project_ref['id'],
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project=project_ref)
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except AssertionError as e:
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LOG.warning(six.text_type(e))
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six.reraise(exception.Unauthorized, exception.Unauthorized(e),
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sys.exc_info()[2])
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def _assert_domain_is_enabled(self, domain_ref):
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try:
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self.resource_api.assert_domain_enabled(
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domain_id=domain_ref['id'],
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domain=domain_ref)
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except AssertionError as e:
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LOG.warning(six.text_type(e))
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six.reraise(exception.Unauthorized, exception.Unauthorized(e),
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sys.exc_info()[2])
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def _lookup_domain(self, domain_info):
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if isinstance(domain_info, dict) is False:
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raise exception.ValidationError(attribute='dict',
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target='domain')
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domain_id = domain_info.get('id')
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domain_name = domain_info.get('name')
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domain_ref = None
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if not domain_id and not domain_name:
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raise exception.ValidationError(attribute='id or name',
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target='domain')
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try:
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if domain_name:
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if (CONF.resource.domain_name_url_safe == 'strict' and
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utils.is_not_url_safe(domain_name)):
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msg = _('Domain name cannot contain reserved characters.')
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raise exception.Unauthorized(message=msg)
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domain_ref = self.resource_api.get_domain_by_name(
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domain_name)
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else:
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domain_ref = self.resource_api.get_domain(domain_id)
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except exception.DomainNotFound as e:
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LOG.warning(six.text_type(e))
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raise exception.Unauthorized(e)
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self._assert_domain_is_enabled(domain_ref)
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return domain_ref
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def _lookup_project(self, project_info):
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if isinstance(project_info, dict) is False:
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raise exception.ValidationError(attribute='dict',
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target='project')
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project_id = project_info.get('id')
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project_name = project_info.get('name')
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project_ref = None
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if not project_id and not project_name:
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raise exception.ValidationError(attribute='id or name',
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target='project')
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try:
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if project_name:
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if (CONF.resource.project_name_url_safe == 'strict' and
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utils.is_not_url_safe(project_name)):
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msg = _('Project name cannot contain reserved characters.')
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raise exception.Unauthorized(message=msg)
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if 'domain' not in project_info:
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raise exception.ValidationError(attribute='domain',
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target='project')
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domain_ref = self._lookup_domain(project_info['domain'])
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project_ref = self.resource_api.get_project_by_name(
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project_name, domain_ref['id'])
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else:
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project_ref = self.resource_api.get_project(project_id)
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# NOTE(morganfainberg): The _lookup_domain method will raise
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# exception.Unauthorized if the domain isn't found or is
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# disabled.
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self._lookup_domain({'id': project_ref['domain_id']})
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except exception.ProjectNotFound as e:
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raise exception.Unauthorized(e)
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self._assert_project_is_enabled(project_ref)
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return project_ref
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def _lookup_trust(self, trust_info):
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trust_id = trust_info.get('id')
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if not trust_id:
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raise exception.ValidationError(attribute='trust_id',
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target='trust')
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trust = self.trust_api.get_trust(trust_id)
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return trust
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def _validate_and_normalize_scope_data(self):
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"""Validate and normalize scope data."""
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if 'scope' not in self.auth:
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return
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if sum(['project' in self.auth['scope'],
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'domain' in self.auth['scope'],
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'unscoped' in self.auth['scope'],
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'OS-TRUST:trust' in self.auth['scope']]) != 1:
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raise exception.ValidationError(
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attribute='project, domain, OS-TRUST:trust or unscoped',
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target='scope')
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if 'unscoped' in self.auth['scope']:
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self._scope_data = (None, None, None, 'unscoped')
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return
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if 'project' in self.auth['scope']:
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project_ref = self._lookup_project(self.auth['scope']['project'])
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self._scope_data = (None, project_ref['id'], None, None)
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elif 'domain' in self.auth['scope']:
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domain_ref = self._lookup_domain(self.auth['scope']['domain'])
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self._scope_data = (domain_ref['id'], None, None, None)
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elif 'OS-TRUST:trust' in self.auth['scope']:
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if not CONF.trust.enabled:
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raise exception.Forbidden('Trusts are disabled.')
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trust_ref = self._lookup_trust(
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self.auth['scope']['OS-TRUST:trust'])
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# TODO(ayoung): when trusts support domains, fill in domain data
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if trust_ref.get('project_id') is not None:
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project_ref = self._lookup_project(
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{'id': trust_ref['project_id']})
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self._scope_data = (None, project_ref['id'], trust_ref, None)
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else:
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self._scope_data = (None, None, trust_ref, None)
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def _validate_auth_methods(self):
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if 'identity' not in self.auth:
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raise exception.ValidationError(attribute='identity',
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target='auth')
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# make sure auth methods are provided
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if 'methods' not in self.auth['identity']:
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raise exception.ValidationError(attribute='methods',
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target='identity')
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# make sure all the method data/payload are provided
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for method_name in self.get_method_names():
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if method_name not in self.auth['identity']:
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raise exception.ValidationError(attribute=method_name,
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target='identity')
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# make sure auth method is supported
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for method_name in self.get_method_names():
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if method_name not in AUTH_METHODS:
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raise exception.AuthMethodNotSupported()
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def _validate_and_normalize_auth_data(self, scope_only=False):
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"""Make sure "auth" is valid.
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:param scope_only: If it is True, auth methods will not be
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validated but only the scope data.
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:type scope_only: boolean
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"""
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# make sure "auth" exist
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if not self.auth:
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raise exception.ValidationError(attribute='auth',
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target='request body')
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# NOTE(chioleong): Tokenless auth does not provide auth methods,
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# we only care about using this method to validate the scope
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# information. Therefore, validating the auth methods here is
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# insignificant and we can skip it when scope_only is set to
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# true.
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if scope_only is False:
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self._validate_auth_methods()
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self._validate_and_normalize_scope_data()
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def get_method_names(self):
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"""Return the identity method names.
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:returns: list of auth method names
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"""
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# Sanitizes methods received in request's body
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# Filters out duplicates, while keeping elements' order.
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method_names = []
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for method in self.auth['identity']['methods']:
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if method not in method_names:
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method_names.append(method)
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return method_names
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def get_method_data(self, method):
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"""Get the auth method payload.
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:returns: auth method payload
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"""
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if method not in self.auth['identity']['methods']:
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raise exception.ValidationError(attribute=method,
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target='identity')
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return self.auth['identity'][method]
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def get_scope(self):
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"""Get scope information.
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Verify and return the scoping information.
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:returns: (domain_id, project_id, trust_ref, unscoped).
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If scope to a project, (None, project_id, None, None)
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will be returned.
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If scoped to a domain, (domain_id, None, None, None)
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will be returned.
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If scoped to a trust, (None, project_id, trust_ref, None),
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Will be returned, where the project_id comes from the
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trust definition.
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If unscoped, (None, None, None, 'unscoped') will be
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returned.
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"""
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return self._scope_data
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def set_scope(self, domain_id=None, project_id=None, trust=None,
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unscoped=None):
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"""Set scope information."""
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if domain_id and project_id:
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msg = _('Scoping to both domain and project is not allowed')
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raise ValueError(msg)
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if domain_id and trust:
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msg = _('Scoping to both domain and trust is not allowed')
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raise ValueError(msg)
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if project_id and trust:
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msg = _('Scoping to both project and trust is not allowed')
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raise ValueError(msg)
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self._scope_data = (domain_id, project_id, trust, unscoped)
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@dependency.requires('assignment_api', 'catalog_api', 'identity_api',
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'resource_api', 'token_provider_api', 'trust_api')
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class Auth(controller.V3Controller):
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# Note(atiwari): From V3 auth controller code we are
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# calling protection() wrappers, so we need to setup
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# the member_name and collection_name attributes of
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# auth controller code.
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# In the absence of these attributes, default 'entity'
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# string will be used to represent the target which is
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# generic. Policy can be defined using 'entity' but it
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# would not reflect the exact entity that is in context.
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# We are defining collection_name = 'tokens' and
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# member_name = 'token' to facilitate policy decisions.
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collection_name = 'tokens'
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member_name = 'token'
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def __init__(self, *args, **kw):
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super(Auth, self).__init__(*args, **kw)
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keystone.conf.auth.setup_authentication()
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def authenticate_for_token(self, request, auth=None):
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"""Authenticate user and issue a token."""
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include_catalog = 'nocatalog' not in request.params
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try:
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auth_info = AuthInfo.create(request.context_dict, auth=auth)
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auth_context = AuthContext(extras={},
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method_names=[],
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bind={})
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self.authenticate(request, auth_info, auth_context)
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if auth_context.get('access_token_id'):
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auth_info.set_scope(None, auth_context['project_id'], None)
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self._check_and_set_default_scoping(auth_info, auth_context)
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(domain_id, project_id, trust, unscoped) = auth_info.get_scope()
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method_names = auth_info.get_method_names()
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method_names += auth_context.get('method_names', [])
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# make sure the list is unique
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method_names = list(set(method_names))
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expires_at = auth_context.get('expires_at')
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# NOTE(morganfainberg): define this here so it is clear what the
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# argument is during the issue_v3_token provider call.
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metadata_ref = None
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token_audit_id = auth_context.get('audit_id')
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is_domain = auth_context.get('is_domain')
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(token_id, token_data) = self.token_provider_api.issue_v3_token(
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auth_context['user_id'], method_names, expires_at, project_id,
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is_domain, domain_id, auth_context, trust, metadata_ref,
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include_catalog, parent_audit_id=token_audit_id)
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# NOTE(wanghong): We consume a trust use only when we are using
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# trusts and have successfully issued a token.
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if trust:
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self.trust_api.consume_use(trust['id'])
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return render_token_data_response(token_id, token_data,
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created=True)
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except exception.TrustNotFound as e:
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raise exception.Unauthorized(e)
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def _check_and_set_default_scoping(self, auth_info, auth_context):
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(domain_id, project_id, trust, unscoped) = auth_info.get_scope()
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if trust:
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project_id = trust['project_id']
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if domain_id or project_id or trust:
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# scope is specified
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return
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# Skip scoping when unscoped federated token is being issued
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if constants.IDENTITY_PROVIDER in auth_context:
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return
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# Do not scope if request is for explicitly unscoped token
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if unscoped is not None:
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return
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# fill in default_project_id if it is available
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try:
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user_ref = self.identity_api.get_user(auth_context['user_id'])
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except exception.UserNotFound as e:
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LOG.warning(six.text_type(e))
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raise exception.Unauthorized(e)
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default_project_id = user_ref.get('default_project_id')
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if not default_project_id:
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# User has no default project. He shall get an unscoped token.
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return
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# make sure user's default project is legit before scoping to it
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try:
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default_project_ref = self.resource_api.get_project(
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default_project_id)
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default_project_domain_ref = self.resource_api.get_domain(
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default_project_ref['domain_id'])
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if (default_project_ref.get('enabled', True) and
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default_project_domain_ref.get('enabled', True)):
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if self.assignment_api.get_roles_for_user_and_project(
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user_ref['id'], default_project_id):
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auth_info.set_scope(project_id=default_project_id)
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else:
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msg = _LW("User %(user_id)s doesn't have access to"
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" default project %(project_id)s. The token"
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" will be unscoped rather than scoped to the"
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" project.")
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LOG.warning(msg,
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{'user_id': user_ref['id'],
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'project_id': default_project_id})
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else:
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msg = _LW("User %(user_id)s's default project %(project_id)s"
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" is disabled. The token will be unscoped rather"
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" than scoped to the project.")
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LOG.warning(msg,
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{'user_id': user_ref['id'],
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'project_id': default_project_id})
|
|
except (exception.ProjectNotFound, exception.DomainNotFound):
|
|
# default project or default project domain doesn't exist,
|
|
# will issue unscoped token instead
|
|
msg = _LW("User %(user_id)s's default project %(project_id)s not"
|
|
" found. The token will be unscoped rather than"
|
|
" scoped to the project.")
|
|
LOG.warning(msg, {'user_id': user_ref['id'],
|
|
'project_id': default_project_id})
|
|
|
|
def authenticate(self, request, auth_info, auth_context):
|
|
"""Authenticate user."""
|
|
# The 'external' method allows any 'REMOTE_USER' based authentication
|
|
# In some cases the server can set REMOTE_USER as '' instead of
|
|
# dropping it, so this must be filtered out
|
|
if request.remote_user:
|
|
try:
|
|
external = get_auth_method('external')
|
|
external.authenticate(request,
|
|
auth_info,
|
|
auth_context)
|
|
except exception.AuthMethodNotSupported:
|
|
# This will happen there is no 'external' plugin registered
|
|
# and the container is performing authentication.
|
|
# The 'kerberos' and 'saml' methods will be used this way.
|
|
# In those cases, it is correct to not register an
|
|
# 'external' plugin; if there is both an 'external' and a
|
|
# 'kerberos' plugin, it would run the check on identity twice.
|
|
LOG.debug("No 'external' plugin is registered.")
|
|
except exception.Unauthorized:
|
|
# If external fails then continue and attempt to determine
|
|
# user identity using remaining auth methods
|
|
LOG.debug("Authorization failed for 'external' auth method.")
|
|
|
|
# need to aggregate the results in case two or more methods
|
|
# are specified
|
|
auth_response = {'methods': []}
|
|
for method_name in auth_info.get_method_names():
|
|
method = get_auth_method(method_name)
|
|
resp = method.authenticate(request,
|
|
auth_info.get_method_data(method_name),
|
|
auth_context)
|
|
if resp:
|
|
auth_response['methods'].append(method_name)
|
|
auth_response[method_name] = resp
|
|
|
|
if auth_response["methods"]:
|
|
# authentication continuation required
|
|
raise exception.AdditionalAuthRequired(auth_response)
|
|
|
|
if 'user_id' not in auth_context:
|
|
msg = _('User not found')
|
|
raise exception.Unauthorized(msg)
|
|
|
|
@controller.protected()
|
|
def check_token(self, request):
|
|
token_id = request.context_dict.get('subject_token_id')
|
|
token_data = self.token_provider_api.validate_v3_token(
|
|
token_id)
|
|
# NOTE(morganfainberg): The code in
|
|
# ``keystone.common.wsgi.render_response`` will remove the content
|
|
# body.
|
|
return render_token_data_response(token_id, token_data)
|
|
|
|
@controller.protected()
|
|
def revoke_token(self, request):
|
|
token_id = request.context_dict.get('subject_token_id')
|
|
return self.token_provider_api.revoke_token(token_id)
|
|
|
|
@controller.protected()
|
|
def validate_token(self, request):
|
|
token_id = request.context_dict.get('subject_token_id')
|
|
include_catalog = 'nocatalog' not in request.params
|
|
token_data = self.token_provider_api.validate_v3_token(
|
|
token_id)
|
|
if not include_catalog and 'catalog' in token_data['token']:
|
|
del token_data['token']['catalog']
|
|
return render_token_data_response(token_id, token_data)
|
|
|
|
@controller.protected()
|
|
def revocation_list(self, request, auth=None):
|
|
if not CONF.token.revoke_by_id:
|
|
raise exception.Gone()
|
|
|
|
audit_id_only = 'audit_id_only' in request.params
|
|
|
|
tokens = self.token_provider_api.list_revoked_tokens()
|
|
|
|
for t in tokens:
|
|
expires = t['expires']
|
|
if not (expires and isinstance(expires, six.text_type)):
|
|
t['expires'] = utils.isotime(expires)
|
|
if audit_id_only:
|
|
t.pop('id', None)
|
|
data = {'revoked': tokens}
|
|
|
|
if audit_id_only:
|
|
# No need to obfuscate if no token IDs.
|
|
return data
|
|
|
|
json_data = jsonutils.dumps(data)
|
|
signed_text = cms.cms_sign_text(json_data,
|
|
CONF.signing.certfile,
|
|
CONF.signing.keyfile)
|
|
|
|
return {'signed': signed_text}
|
|
|
|
def _combine_lists_uniquely(self, a, b):
|
|
# it's most likely that only one of these will be filled so avoid
|
|
# the combination if possible.
|
|
if a and b:
|
|
return {x['id']: x for x in a + b}.values()
|
|
else:
|
|
return a or b
|
|
|
|
@controller.protected()
|
|
def get_auth_projects(self, request):
|
|
user_id = request.auth_context.get('user_id')
|
|
group_ids = request.auth_context.get('group_ids')
|
|
|
|
user_refs = []
|
|
if user_id:
|
|
try:
|
|
user_refs = self.assignment_api.list_projects_for_user(user_id)
|
|
except exception.UserNotFound: # nosec
|
|
# federated users have an id but they don't link to anything
|
|
pass
|
|
|
|
grp_refs = []
|
|
if group_ids:
|
|
grp_refs = self.assignment_api.list_projects_for_groups(group_ids)
|
|
|
|
refs = self._combine_lists_uniquely(user_refs, grp_refs)
|
|
return resource_controllers.ProjectV3.wrap_collection(
|
|
request.context_dict, refs)
|
|
|
|
@controller.protected()
|
|
def get_auth_domains(self, request):
|
|
user_id = request.auth_context.get('user_id')
|
|
group_ids = request.auth_context.get('group_ids')
|
|
|
|
user_refs = []
|
|
if user_id:
|
|
try:
|
|
user_refs = self.assignment_api.list_domains_for_user(user_id)
|
|
except exception.UserNotFound: # nosec
|
|
# federated users have an id but they don't link to anything
|
|
pass
|
|
|
|
grp_refs = []
|
|
if group_ids:
|
|
grp_refs = self.assignment_api.list_domains_for_groups(group_ids)
|
|
|
|
refs = self._combine_lists_uniquely(user_refs, grp_refs)
|
|
return resource_controllers.DomainV3.wrap_collection(
|
|
request.context_dict, refs)
|
|
|
|
@controller.protected()
|
|
def get_auth_catalog(self, request):
|
|
user_id = request.auth_context.get('user_id')
|
|
project_id = request.auth_context.get('project_id')
|
|
|
|
if not project_id:
|
|
raise exception.Forbidden(
|
|
_('A project-scoped token is required to produce a service '
|
|
'catalog.'))
|
|
|
|
# The V3Controller base methods mostly assume that you're returning
|
|
# either a collection or a single element from a collection, neither of
|
|
# which apply to the catalog. Because this is a special case, this
|
|
# re-implements a tiny bit of work done by the base controller (such as
|
|
# self-referential link building) to avoid overriding or refactoring
|
|
# several private methods.
|
|
return {
|
|
'catalog': self.catalog_api.get_v3_catalog(user_id, project_id),
|
|
'links': {'self': self.base_url(request.context_dict,
|
|
path='auth/catalog')}
|
|
}
|
|
|
|
|
|
# FIXME(gyee): not sure if it belongs here or keystone.common. Park it here
|
|
# for now.
|
|
def render_token_data_response(token_id, token_data, created=False):
|
|
"""Render token data HTTP response.
|
|
|
|
Stash token ID into the X-Subject-Token header.
|
|
|
|
"""
|
|
headers = [('X-Subject-Token', token_id)]
|
|
|
|
if created:
|
|
status = (201, 'Created')
|
|
else:
|
|
status = (200, 'OK')
|
|
|
|
return wsgi.render_response(body=token_data,
|
|
status=status, headers=headers)
|