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# Copyright 2015 Open Platform for NFV Project, Inc. and its contributors
# This software is distributed under the terms and conditions of the 'Apache-2.0'
# license which can be found in the file 'LICENSE' in this package distribution
# or at 'http://www.apache.org/licenses/LICENSE-2.0'.
import copy
import itertools
from oslo_log import log as logging
from oslo_config import cfg
from moon_utilities.security_functions import call, Context
from moon_utilities.misc import get_uuid_from_name
from moon_utilities import exceptions
from moon_db.core import PDPManager
from moon_db.core import ModelManager
from moon_db.core import PolicyManager
# TODO (asteroide):
# - end the dev of the context
# - rebuild the authorization function according to the context
# - call the next security function
# - call the master if an element is absent
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.
"""
__version__ = "0.1.0"
pdp_id = None
meta_rule_id = None
keystone_project_id = None
def __init__(self, component_id):
self.component_id = component_id
LOG.info("ext={}".format(component_id))
for _id_value in component_id.split("_"):
LOG.info("_id_value={}".format(_id_value.split(":")))
_type, _id = _id_value.split(":")
if _type == "pdp":
self.pdp_id = _id
elif _type == "metarule":
self.meta_rule_id = _id
elif _type == "project":
self.keystone_project_id = _id
# self.manager = IntraExtensionAdminManager
# self.context = {"id": self.component_id, "user_id": "admin"}
# self.aggregation_algorithm_dict = ConfigurationManager.driver.get_aggregation_algorithms_dict()
# self.__subjects = None
# self.__objects = None
# self.__actions = None
# self.__subject_scopes = None
# self.__object_scopes = None
# self.__action_scopes = None
# self.__subject_categories = None
# self.__object_categories = None
# self.__action_categories = None
# self.__subject_assignments = None
# self.__object_assignments = None
# self.__action_assignments = None
# self.__sub_meta_rules = None
# self.__rules = None
# self.aggregation_algorithm_id = None
# @property
# def subjects(self):
# if not self.__subjects:
# self.__subjects = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_subjects", args={})
# if "subjects" in self.__subjects:
# return self.__subjects
# else:
# LOG.error("An error occurred {}".format(self.__subjects))
# return self.__subjects
#
# @property
# def objects(self):
# if not self.__objects:
# self.__objects = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_objects", args={})
# if "objects" in self.__objects:
# return self.__objects
# else:
# LOG.error("An error occurred {}".format(self.__objects))
# return self.__objects
#
# @property
# def actions(self):
# if not self.__actions:
# self.__actions = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_actions", args={})
# if "actions" in self.__actions:
# return self.__actions
# else:
# LOG.error("An error occurred {}".format(self.__actions))
# return self.__actions
#
# @property
# def subject_scopes(self):
# if not self.__subject_scopes:
# self.__subject_scopes = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_subject_scopes", args={})
# if "subject_scopes" in self.__subject_scopes:
# return self.__subject_scopes
# else:
# LOG.error("An error occurred {}".format(self.__subject_scopes))
# return self.__subject_scopes
#
# @property
# def object_scopes(self):
# if not self.__object_scopes:
# self.__object_scopes = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_object_scopes", args={})
# if "object_scopes" in self.__object_scopes:
# return self.__object_scopes
# else:
# LOG.error("An error occurred {}".format(self.__object_scopes))
# return self.__object_scopes
#
# @property
# def action_scopes(self):
# if not self.__action_scopes:
# self.__action_scopes = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_action_scopes", args={})
# if "action_scopes" in self.__action_scopes:
# return self.__action_scopes
# else:
# LOG.error("An error occurred {}".format(self.__action_scopes))
# return self.__action_scopes
#
# @property
# def subject_categories(self):
# if not self.__subject_categories:
# self.__subject_categories = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_subject_categories", args={})
# if "subject_categories" in self.__subject_categories:
# return self.__subject_categories
# else:
# LOG.error("An error occurred {}".format(self.__subject_categories))
# return self.__subject_categories
#
# @property
# def object_categories(self):
# if not self.__object_categories:
# self.__object_categories = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_object_categories", args={})
# if "object_categories" in self.__object_categories:
# return self.__object_categories
# else:
# LOG.error("An error occurred {}".format(self.__object_categories))
# return self.__object_categories
#
# @property
# def action_categories(self):
# if not self.__action_categories:
# self.__action_categories = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_action_categories", args={})
# if "action_categories" in self.__action_categories:
# return self.__action_categories
# else:
# LOG.error("An error occurred {}".format(self.__action_categories))
# return self.__action_categories
#
# @property
# def subject_assignments(self):
# if not self.__subject_assignments:
# context = copy.deepcopy(self.context)
# context['sid'] = None
# context['scid'] = None
# args = {'ssid': None}
# self.__subject_assignments = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=context,
# method="get_subject_assignments", args=args)
# if "subject_assignments" in self.__subject_assignments:
# return self.__subject_assignments
# else:
# LOG.error("An error occurred {}".format(self.__subject_assignments))
# return self.__subject_assignments
#
# @property
# def object_assignments(self):
# if not self.__object_assignments:
# context = copy.deepcopy(self.context)
# context['sid'] = None
# context['scid'] = None
# args = {'ssid': None}
# self.__object_assignments = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=context,
# method="get_object_assignments", args=args)
# if "object_assignments" in self.__object_assignments:
# return self.__object_assignments
# else:
# LOG.error("An error occurred {}".format(self.__object_assignments))
# return self.__object_assignments
#
# @property
# def action_assignments(self):
# if not self.__action_assignments:
# context = copy.deepcopy(self.context)
# context['sid'] = None
# context['scid'] = None
# args = {'ssid': None}
# self.__action_assignments = call("moon_secpolicy_{}".format(self.intra_extension_id), ctx=context,
# method="get_action_assignments", args=args)
# if "action_assignments" in self.__action_assignments:
# return self.__action_assignments
# else:
# LOG.error("An error occurred {}".format(self.__action_assignments))
# return self.__action_assignments
#
# @property
# def sub_meta_rules(self):
# if not self.__sub_meta_rules:
# self.__sub_meta_rules = call("moon_secfunction_{}".format(self.intra_extension_id), ctx=self.context,
# method="get_sub_meta_rules", args={})
# if "sub_meta_rules" in self.__sub_meta_rules:
# return self.__sub_meta_rules
# else:
# LOG.error("An error occurred {}".format(self.__sub_meta_rules))
# return self.__sub_meta_rules
#
# @property
# def rules(self):
# if not self.__rules:
# self.__rules = dict()
# for _id, _value in self.sub_meta_rules["sub_meta_rules"].items():
# context = copy.deepcopy(self.context)
# context["sub_meta_rule_id"] = _id
# __elements = call("moon_secfunction_{}".format(self.intra_extension_id), ctx=context,
# method="get_rules", args={})
# if "rules" in __elements:
# self.__rules[_id] = __elements
# else:
# LOG.error("An error occurred {}".format(__elements))
# return self.__rules
# def __get_authz_buffer(self, subject_id, object_id, action_id):
# """
# :param intra_extension_id:
# :param subject_id:
# :param object_id:
# :param action_id:
# :return: authz_buffer = {
# 'subject_id': xxx,
# 'object_id': yyy,
# 'action_id': zzz,
# 'subject_assignments': {
# 'subject_category1': [],
# 'subject_category2': [],
# ...
# },
# 'object_assignments': {},
# 'action_assignments': {},
# }
# """
# authz_buffer = dict()
# # Sometimes it is not the subject ID but the User Keystone ID, so, we have to check
# subjects_dict = copy.deepcopy(self.subjects)
# if subject_id not in subjects_dict["subjects"].keys():
# for _subject_id in subjects_dict["subjects"]:
# if subjects_dict["subjects"][_subject_id]['keystone_id']:
# subject_id = _subject_id
# break
# authz_buffer['subject_id'] = subject_id
# authz_buffer['object_id'] = object_id
# authz_buffer['action_id'] = action_id
# meta_data_dict = dict()
# meta_data_dict["subject_categories"] = copy.deepcopy(self.subject_categories["subject_categories"])
# meta_data_dict["object_categories"] = copy.deepcopy(self.object_categories["object_categories"])
# meta_data_dict["action_categories"] = copy.deepcopy(self.action_categories["action_categories"])
# subject_assignment_dict = copy.deepcopy(self.subject_assignments['subject_assignments'][subject_id])
# LOG.info("__get_authz_buffer self.object_assignments['object_assignments']={}".format(self.object_assignments['object_assignments']))
# LOG.info("__get_authz_buffer object_id={}".format(object_id))
# object_assignment_dict = copy.deepcopy(self.object_assignments['object_assignments'][object_id])
# action_assignment_dict = copy.deepcopy(self.action_assignments['action_assignments'][action_id])
#
# authz_buffer['subject_assignments'] = dict()
# authz_buffer['object_assignments'] = dict()
# authz_buffer['action_assignments'] = dict()
#
# for _subject_category in meta_data_dict['subject_categories']:
# authz_buffer['subject_assignments'][_subject_category] = list(subject_assignment_dict[_subject_category])
# for _object_category in meta_data_dict['object_categories']:
# authz_buffer['object_assignments'][_object_category] = list(object_assignment_dict[_object_category])
# for _action_category in meta_data_dict['action_categories']:
# authz_buffer['action_assignments'][_action_category] = list(action_assignment_dict[_action_category])
# return authz_buffer
#
# def __get_decision_dict(self, subject_id, object_id, action_id):
# """Check authorization for a particular action.
#
# :param intra_extension_id: UUID of an IntraExtension
# :param subject_id: subject UUID of the request
# :param object_id: object UUID of the request
# :param action_id: action UUID of the request
# :return: True or False or raise an exception
# :raises:
# """
# authz_buffer = self.__get_authz_buffer(subject_id, object_id, action_id)
# decision_buffer = dict()
#
# meta_rule_dict = copy.deepcopy(self.sub_meta_rules['sub_meta_rules'])
# rules_dict = copy.deepcopy(self.rules)
# for sub_meta_rule_id in meta_rule_dict:
# if meta_rule_dict[sub_meta_rule_id]['algorithm'] == 'inclusion':
# decision_buffer[sub_meta_rule_id] = algorithms.inclusion(
# authz_buffer,
# meta_rule_dict[sub_meta_rule_id],
# rules_dict[sub_meta_rule_id]['rules'].values())
# elif meta_rule_dict[sub_meta_rule_id]['algorithm'] == 'comparison':
# decision_buffer[sub_meta_rule_id] = algorithms.comparison(
# authz_buffer,
# meta_rule_dict[sub_meta_rule_id],
# rules_dict[sub_meta_rule_id]['rules'].values())
#
# return decision_buffer
#
# def __authz(self, subject_id, object_id, action_id):
# decision = False
# decision_dict = dict()
# try:
# decision_dict = self.__get_decision_dict(subject_id, object_id, action_id)
# except (exceptions.SubjectUnknown, exceptions.ObjectUnknown, exceptions.ActionUnknown) as e:
# # maybe we need to synchronize with the master
# pass
# # if CONF.slave.slave_name and CONF.slave.master_url:
# # self.get_data_from_master()
# # decision_dict = self.__get_decision_dict(subject_id, object_id, action_id)
#
# try:
# # aggregation_algorithm_id = IntraExtensionAdminManager.get_aggregation_algorithm_id(
# # "admin",
# # self.intra_extension_id)['aggregation_algorithm']
# if not self.aggregation_algorithm_id:
# self.aggregation_algorithm_id = self.intra_extension['aggregation_algorithm']
# except Exception as e:
# LOG.error(e, exc_info=True)
# LOG.error(self.intra_extension)
# return {
# 'authz': False,
# 'comment': "Aggregation algorithm not set"
# }
# if self.aggregation_algorithm_dict[self.aggregation_algorithm_id]['name'] == 'all_true':
# decision = algorithms.all_true(decision_dict)
# elif self.aggregation_algorithm_dict[self.aggregation_algorithm_id]['name'] == 'one_true':
# decision = algorithms.one_true(decision_dict)
# if not decision_dict or not decision:
# raise exceptions.AuthzException("{} {}-{}-{}".format(self.intra_extension['id'], subject_id, action_id, object_id))
# return {
# 'authz': decision,
# 'comment': "{} {}-{}-{}".format(self.intra_extension['id'], subject_id, action_id, object_id)
# }
#
# def authz_bak(self, ctx, args):
# """Return the authorization for a specific request
#
# :param ctx: {
# "subject_name" : "string name",
# "action_name" : "string name",
# "object_name" : "string name"
# }
# :param args: {}
# :return: {
# "authz": "True or False",
# "message": "optional message"
# }
# """
# intra_extension_id = ctx["id"]
# try:
# subject_id = get_uuid_from_name(ctx["subject_name"], self.subjects['subjects'])
# object_id = get_uuid_from_name(ctx["object_name"], self.objects['objects'])
# action_id = get_uuid_from_name(ctx["action_name"], self.actions['actions'])
# authz_result = self.__authz(subject_id, object_id, action_id)
# return authz_result
# except Exception as e:
# LOG.error(e, exc_info=True)
# return {"authz": False,
# "error": str(e),
# "intra_extension_id": intra_extension_id,
# "ctx": ctx, "args": args}
#
# return {"authz": False}
def __check_rules(self, context):
scopes_list = list()
current_header_id = context.headers[context.index]['id']
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"]["action_categories"])
category_list.extend(current_pdp["meta_rules"]["object_categories"])
for category in category_list:
if not current_pdp['target'][category]:
LOG.warning("Empty assignment detected: {} target={}".format(category, current_pdp['target']))
return False, "Empty assignment detected..."
scopes_list.append(current_pdp['target'][category])
scopes_list.append([True, ])
rules = PolicyManager.get_rules_dict(user_id="admin",
policy_id=self.policy_id,
meta_rule_id=current_header_id).values()
for item in itertools.product(*scopes_list):
if list(item) in rules:
return True, ""
LOG.warning("No rule match the request...")
return False, "No rule match the request..."
def authz(self, ctx, args):
LOG.info("authz {}".format(ctx))
keystone_project_id = ctx["id"]
try:
if "authz_context" not in ctx:
ctx["authz_context"] = Context(keystone_project_id,
ctx["subject_name"],
ctx["object_name"],
ctx["action_name"],
ctx["request_id"]).to_dict()
LOG.info("Context={}".format(ctx["authz_context"]))
else:
ctx["authz_context"].index += 1
result, message = self.__check_rules(ctx["authz_context"])
# if ctx["authz_context"].index < len(ctx["authz_context"].headers):
del ctx["authz_context"]
return {"authz": result,
"error": message,
"pdp_id": self.pdp_id,
"ctx": ctx, "args": args}
except Exception as e:
try:
LOG.error(ctx["authz_context"])
# del ctx["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": ctx, "args": args}
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