diff options
Diffstat (limited to 'moonv4/moon_authz')
| -rw-r--r-- | moonv4/moon_authz/moon_authz/api/authorization.py | 248 |
1 files changed, 205 insertions, 43 deletions
diff --git a/moonv4/moon_authz/moon_authz/api/authorization.py b/moonv4/moon_authz/moon_authz/api/authorization.py index 5968178e..e4d7ad7c 100644 --- a/moonv4/moon_authz/moon_authz/api/authorization.py +++ b/moonv4/moon_authz/moon_authz/api/authorization.py @@ -25,12 +25,6 @@ LOG = logging.getLogger(__name__) CONF = cfg.CONF -class PDP: - - def __init__(self, context): - self.__context = context - - class Authorization(object): """ Retrieve the current status of all components. @@ -40,13 +34,14 @@ class Authorization(object): pdp_id = None meta_rule_id = None keystone_project_id = None + payload = None def __init__(self, component_desc): self.component_id = component_desc LOG.info("ext={}".format(component_desc)) self.filter_rule = oslo_messaging.NotificationFilter( event_type='^authz$', - context={'container_id': "authz_"+hashlib.sha224(component_desc.encode("utf-8")).hexdigest()} + context={'container_id': "\w+_"+hashlib.sha224(component_desc.encode("utf-8")).hexdigest()} ) for _id_value in component_desc.split("_"): @@ -61,27 +56,205 @@ class Authorization(object): def __check_rules(self, context): scopes_list = list() current_header_id = context['headers'][context['index']] + Context.update_target(context) current_pdp = context['pdp_set'][current_header_id] category_list = list() category_list.extend(current_pdp["meta_rules"]["subject_categories"]) category_list.extend(current_pdp["meta_rules"]["object_categories"]) category_list.extend(current_pdp["meta_rules"]["action_categories"]) for category in category_list: - # if not current_pdp['target'][category]: - # LOG.warning("Empty assignment detected: {} target={}".format(category, current_pdp['target'])) - scopes_list.append(current_pdp['target'][category]) + scope = list(current_pdp['target'][category]) + scopes_list.append(scope) policy_id = PolicyManager.get_policy_from_meta_rules("admin", current_header_id) rules = PolicyManager.get_rules(user_id="admin", policy_id=policy_id, meta_rule_id=current_header_id) - rules = list(map(lambda x: x['rule'], rules['rules'])) for item in itertools.product(*scopes_list): req = list(item) - if req in rules: - return True, "" + for rule in rules['rules']: + if req == rule['rule']: + return rule['instructions'], "" LOG.warning("No rule match the request...") return False, "No rule match the request..." + def __update_subject_category_in_policy(self, operation, target): + result = False + try: + policy_name, category_name, data_name = target.split(":") + except ValueError: + LOG.error("Cannot understand value in instruction ({})".format(target)) + return False + pdp_set = self.payload["authz_context"]['pdp_set'] + for meta_rule_id in self.payload["authz_context"]['pdp_set']: + policy_id = PolicyManager.get_policy_from_meta_rules("admin", meta_rule_id) + if meta_rule_id == "effect": + continue + if pdp_set[meta_rule_id]["meta_rules"]["name"] == policy_name: + for category_id, category_value in ModelManager.get_subject_categories("admin").items(): + if category_value["name"] == "role": + subject_category_id = category_id + break + else: + LOG.error("Cannot understand category in instruction ({})".format(target)) + return False + subject_data_id = None + for data in PolicyManager.get_subject_data("admin", policy_id, category_id=subject_category_id): + for data_id, data_value in data['data'].items(): + if data_value["name"] == data_name: + subject_data_id = data_id + break + if subject_data_id: + break + else: + LOG.error("Cannot understand data in instruction ({})".format(target)) + return False + if operation == "add": + self.payload["authz_context"]['pdp_set'][meta_rule_id]['target'][subject_category_id].append( + subject_data_id) + elif operation == "delete": + try: + self.payload["authz_context"]['pdp_set'][meta_rule_id]['target'][subject_category_id].remove( + subject_data_id) + except ValueError: + LOG.warning("Cannot remove role {} from target".format(data_name)) + result = True + break + return result + + def __update_container_chaining(self): + for index in range(len(self.payload["authz_context"]['headers'])): + self.payload["container_chaining"][index]["meta_rule_id"] = self.payload["authz_context"]['headers'][index] + + def __get_container_from_meta_rule(self, meta_rule_id): + for index in range(len(self.payload["authz_context"]['headers'])): + if self.payload["container_chaining"][index]["meta_rule_id"] == meta_rule_id: + return self.payload["container_chaining"][index] + + def __update_headers(self, name): + context = self.payload["authz_context"] + for meta_rule_id, meta_rule_value in context["pdp_set"].items(): + if meta_rule_id == "effect": + continue + if meta_rule_value["meta_rules"]["name"] == name: + self.payload["authz_context"]['headers'].append(meta_rule_id) + return True + return False + + def __exec_next_state(self, rule_found): + index = self.payload["authz_context"]['index'] + current_meta_rule = self.payload["authz_context"]['headers'][index] + current_container = self.__get_container_from_meta_rule(current_meta_rule) + current_container_genre = current_container["genre"] + try: + next_meta_rule = self.payload["authz_context"]['headers'][index+1] + except IndexError: + next_meta_rule = None + if current_container_genre == "authz": + if rule_found: + return self.__return_to_router() + pass + if next_meta_rule: + # next will be session if current is deny and session is unset + if self.payload["authz_context"]['pdp_set'][next_meta_rule]['effect'] == "unset": + return notify( + request_id=self.payload["authz_context"]["request_id"], + container_id=self.__get_container_from_meta_rule(next_meta_rule)['container_id'], + payload=self.payload) + # next will be delegation if current is deny and session is passed or deny and delegation is unset + else: + LOG.error("Delegation is not developed!") + + else: + # else next will be None and the request is sent to router + return self.__return_to_router() + elif current_container_genre == "session": + pass + # next will be next container in headers if current is passed + if self.payload["authz_context"]['pdp_set'][current_meta_rule]['effect'] == "passed": + return notify( + request_id=self.payload["authz_context"]["request_id"], + container_id=self.__get_container_from_meta_rule(next_meta_rule)['container_id'], + payload=self.payload) + # next will be None if current is grant and the request is sent to router + else: + return self.__return_to_router() + elif current_container_genre == "delegation": + LOG.error("Delegation is not developed!") + # next will be authz if current is deny + # next will be None if current is grant and the request is sent to router + + def __return_to_router(self): + call(endpoint="security_router", + ctx={"id": self.component_id, + "call_master": False, + "method": "return_authz", + "request_id": self.payload["authz_context"]["request_id"]}, + method="route", + args=self.payload["authz_context"]) + + def __exec_instructions(self, instructions): + current_header_id = self.payload["authz_context"]['headers'][self.payload["authz_context"]['index']] + for instruction in instructions: + for key in instruction: + if key == "decision": + if instruction["decision"] == "grant": + self.payload["authz_context"]['pdp_set'][current_header_id]["effect"] = "grant" + self.__return_to_router() + else: + self.payload["authz_context"]['pdp_set'][current_header_id]["effect"] = instruction["decision"] + elif key == "chain": + result = self.__update_headers(**instruction["chain"]) + if not result: + self.payload["authz_context"]['pdp_set'][current_header_id]["effect"] = "deny" + else: + self.payload["authz_context"]['pdp_set'][current_header_id]["effect"] = "passed" + elif key == "update": + result = self.__update_subject_category_in_policy(**instruction["update"]) + if not result: + self.payload["authz_context"]['pdp_set'][current_header_id]["effect"] = "deny" + else: + self.payload["authz_context"]['pdp_set'][current_header_id]["effect"] = "passed" + # LOG.info("__exec_instructions {}".format(self.payload["authz_context"])) + + def __update_current_request(self): + index = self.payload["authz_context"]["index"] + current_header_id = self.payload["authz_context"]['headers'][index] + previous_header_id = self.payload["authz_context"]['headers'][index-1] + current_policy_id = PolicyManager.get_policy_from_meta_rules("admin", current_header_id) + previous_policy_id = PolicyManager.get_policy_from_meta_rules("admin", previous_header_id) + # FIXME (asteroide): must change those lines to be ubiquitous against any type of policy + if self.payload["authz_context"]['pdp_set'][current_header_id]['meta_rules']['name'] == "session": + subject = self.payload["authz_context"]['current_request'].get("subject") + subject_category_id = None + role_names = [] + for category_id, category_value in ModelManager.get_subject_categories("admin").items(): + if category_value["name"] == "role": + subject_category_id = category_id + break + for assignment_id, assignment_value in PolicyManager.get_subject_assignments( + "admin", previous_policy_id, subject, subject_category_id).items(): + for data_id in assignment_value["assignments"]: + data = PolicyManager.get_subject_data("admin", previous_policy_id, data_id, subject_category_id) + for _data in data: + for key, value in _data["data"].items(): + role_names.append(value["name"]) + new_role_ids = [] + for perimeter_id, perimeter_value in PolicyManager.get_objects("admin", current_policy_id).items(): + if perimeter_value["name"] in role_names: + new_role_ids.append(perimeter_id) + break + perimeter_id = None + for perimeter_id, perimeter_value in PolicyManager.get_actions("admin", current_policy_id).items(): + if perimeter_value["name"] == "*": + break + + self.payload["authz_context"]['current_request']['object'] = new_role_ids[0] + self.payload["authz_context"]['current_request']['action'] = perimeter_id + elif self.payload["authz_context"]['pdp_set'][current_header_id]['meta_rules']['name'] == "rbac": + self.payload["authz_context"]['current_request']['subject'] = self.payload["authz_context"]['initial_request']['subject'] + self.payload["authz_context"]['current_request']['object'] = self.payload["authz_context"]['initial_request']['object'] + self.payload["authz_context"]['current_request']['action'] = self.payload["authz_context"]['initial_request']['action'] + def critical(self, ctxt, publisher_id, event_type, payload, metadata): """This is the authz endpoint but due to the oslo_messaging notification architecture, we must call it "critical" @@ -93,50 +266,39 @@ class Authorization(object): :param metadata: metadata of the notification :return: result of the authorization for the current component """ - LOG.info("authz {} {}".format(ctxt, payload)) - keystone_project_id = payload["id"] + LOG.info("calling authz {} {}".format(ctxt, payload)) + self.keystone_project_id = payload["id"] + self.payload = payload try: if "authz_context" not in payload: - payload["authz_context"] = Context(keystone_project_id, - payload["subject_name"], - payload["object_name"], - payload["action_name"], - payload["request_id"]).to_dict() + self.payload["authz_context"] = Context(self.keystone_project_id, + self.payload["subject_name"], + self.payload["object_name"], + self.payload["action_name"], + self.payload["request_id"]).to_dict() + self.__update_container_chaining() else: - payload["authz_context"]["index"] += 1 - result, message = self.__check_rules(payload["authz_context"]) - current_header_id = payload["authz_context"]['headers'][payload["authz_context"]['index']] - # current_pdp = payload["authz_context"]['pdp_set'][current_header_id] + self.payload["authz_context"]["index"] += 1 + self.__update_current_request() + result, message = self.__check_rules(self.payload["authz_context"]) + current_header_id = self.payload["authz_context"]['headers'][self.payload["authz_context"]['index']] if result: - payload["authz_context"]['pdp_set'][current_header_id]["effect"] = "grant" - if payload["authz_context"]["index"]+1 < len(payload["authz_context"]["headers"]): - next_index = payload["authz_context"]["index"]+1 - notify( - request_id=payload["authz_context"]["request_id"], - container_id=payload["container_chaining"][next_index], - payload=payload) + self.__exec_instructions(result) else: - ret = call(endpoint="security_router", - ctx={"id": self.component_id, - "call_master": False, - "method": "return_authz", - "request_id": payload["authz_context"]["request_id"]}, - method="route", - args=payload["authz_context"]) - del payload["authz_context"] + self.payload["authz_context"]['pdp_set'][current_header_id]["effect"] = "deny" + self.__exec_next_state(result) return {"authz": result, "error": message, "pdp_id": self.pdp_id, - "ctx": ctxt, "args": payload} + "ctx": ctxt, "args": self.payload} except Exception as e: try: - LOG.error(payload["authz_context"]) - # del ctx["authz_context"] + LOG.error(self.payload["authz_context"]) except KeyError: LOG.error("Cannot find \"authz_context\" in context") LOG.error(e, exc_info=True) return {"authz": False, "error": str(e), "pdp_id": self.pdp_id, - "ctx": ctxt, "args": payload} + "ctx": ctxt, "args": self.payload} |