# Copyright 2016 - Nokia Networks # # 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. import logging import keystoneauth1.access.service_catalog as sc import keystoneauth1.identity.generic as auth_plugin from keystoneauth1 import session as ks_session import mistralclient.api.httpclient as api from mistralclient import auth as mistral_auth from oslo_serialization import jsonutils LOG = logging.getLogger(__name__) class KeystoneAuthHandler(mistral_auth.AuthHandler): def authenticate(self, req, session=None): """Perform authentication via Keystone. :param req: Request dict containing the parameters required for Keystone authentication. """ reqs = self._separate_target_reqs(req) try: result = self._authenticate(reqs, session) except Exception as e: if "Cannot use v2 authentication with domain scope" in str(e): LOG.warning("Client tried to use v2 authentication with " "domain scope. Domain parameters are assumed " "to be erroneously set. Retrying " "authentication without them. " "Request parameters: %s" % str(reqs)) domainless_reqs = [reqs[0], self._remove_domain(reqs[1])] result = self._authenticate(domainless_reqs, session) else: raise return result @staticmethod def _separate_target_reqs(req): """Separates parameters into target and non-target ones. target_* parameters are rekeyed by removing the prefix. :param req: Request dict containing the parameters for Keystone authentication. :return: list of [non-target, target] request parameters """ r = {} target_r = {} target_prefix = "target_" for key in req: if key.startswith(target_prefix): target_r[key[len(target_prefix):]] = req[key] else: r[key] = req[key] return [r, target_r] @staticmethod def _remove_domain(req): """Remove all domain parameters from req. Keystoneauth with V2 does not accept domain parameters. This is an incompatible change from Keystoneclient but it would unnecessarily break clients of Mistral. It is safe to remove domain parameters if V2 auth is targeted. :param req: Request dict containing list of parameters required :return: Request dict without domains """ r = {} for key in req: if "domain" not in key: r[key] = req[key] return r @staticmethod def _get_auth(api_key=None, auth_token=None, auth_url=None, project_domain_id=None, project_domain_name=None, project_id=None, project_name=None, user_domain_id=None, user_domain_name=None, user_id=None, username=None, **kwargs): if project_name and project_id: project_name = None LOG.warning( "Only one of project_name or project_id should be set," "project_name will be ignored" ) if username and user_id: username = None LOG.warning( "Only one of username or user_id should be set," "username will be ignored" ) auth = {} if auth_token: auth = auth_plugin.Token( auth_url=auth_url, project_domain_id=project_domain_id, project_domain_name=project_domain_name, project_id=project_id, project_name=project_name, token=auth_token ) elif api_key and (username or user_id): auth = auth_plugin.Password( auth_url=auth_url, password=api_key, project_domain_id=project_domain_id, project_domain_name=project_domain_name, project_id=project_id, project_name=project_name, user_domain_id=user_domain_id, user_domain_name=user_domain_name, user_id=user_id, username=username ) return auth def _authenticate(self, reqs, session=None): """Performs authentication via Keystone. :param reqs: Request dict containing list of parameters required for Keystone authentication. :return: Auth response dict """ if not isinstance(reqs[0], dict): raise TypeError('The input "req" is not typeof dict.') if not isinstance(reqs[1], dict): raise TypeError('The input "req" is not typeof dict.') auth_response = {} req = reqs[0] cacert = req.get('cacert') endpoint_type = req.get('endpoint_type', 'publicURL') insecure = req.get('insecure') mistral_url = req.get('mistral_url') region_name = req.get('region_name') service_type = req.get('service_type', 'workflowv2') verify = self._verification_needed(cacert, insecure) if not session: auth = self._get_auth(**req) if auth: session = ks_session.Session(auth=auth, verify=verify) if session: if not mistral_url: try: mistral_url = session.get_endpoint( service_type=service_type, interface=endpoint_type, region_name=region_name ) except Exception: mistral_url = None auth_response['mistral_url'] = mistral_url auth_response['session'] = session target_req = reqs[1] if "auth_url" in target_req: target_auth = self._get_auth(**target_req) if target_auth: # target cacert and insecure cacert = target_req.get('cacert') insecure = target_req.get('insecure') verify = self._verification_needed(cacert, insecure) target_session = ks_session.Session( auth=target_auth, verify=verify ) target_auth_headers = target_session.get_auth_headers() or {} target_auth_token = target_auth_headers.get('X-Auth-Token') auth_response.update({ api.TARGET_AUTH_TOKEN: target_auth_token, api.TARGET_PROJECT_ID: target_session.get_project_id(), api.TARGET_USER_ID: target_session.get_user_id(), api.TARGET_AUTH_URI: target_auth._plugin.auth_url, }) access = target_auth.get_access(target_session) service_catalog = access.service_catalog if self._is_service_catalog_v2(service_catalog): access_data = access._data["access"] if not len(access_data['serviceCatalog']): LOG.warning( "Service Catalog empty, some authentication" "credentials may be missing. This can cause" "malfunction in the Mistral action executions.") sc_json = jsonutils.dumps(access_data) auth_response[api.TARGET_SERVICE_CATALOG] = sc_json if not auth_response: LOG.debug("No valid token or password + user provided. " "Continuing without authentication") return {} return auth_response @staticmethod def _verification_needed(cacert, insecure): """Return the verify parameter. The value of verify can be either True/False or a cacert. :param cacert None or path to CA cert file :param insecure truthy value to switch on SSL verification """ if insecure is False or insecure is None: verify = cacert or True else: verify = False return verify @staticmethod def _is_service_catalog_v2(catalog): """Check if the service catalog is of type ServiceCatalogV2 :param catalog: the service catalog :return: True if V2, False otherwise """ return type(catalog) is sc.ServiceCatalogV2