#
# Copyright (c) 2014 Mirantis Inc.
#
#    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.

"""Policy Engine For Sahara"""

import functools

from oslo_config import cfg
from oslo_policy import policy

from sahara.common import policies
from sahara import context
from sahara import exceptions

ENFORCER = None


def setup_policy():
    global ENFORCER

    ENFORCER = policy.Enforcer(cfg.CONF)
    ENFORCER.register_defaults(policies.list_rules())


def enforce(rule):
    def decorator(func):
        @functools.wraps(func)
        def handler(*args, **kwargs):
            ctx = context.ctx()
            ENFORCER.enforce(rule, {}, ctx.to_dict(), do_raise=True,
                             exc=exceptions.Forbidden)

            return func(*args, **kwargs)
        return handler

    return decorator

#
# Copyright (c) 2014 Mirantis Inc.
#
#    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.

"""Policy Engine For Sahara"""

import functools

from oslo_config import cfg
from oslo_policy import policy

from sahara.common import policies
from sahara import context
from sahara import exceptions

ENFORCER = None


def setup_policy():
    global ENFORCER

    ENFORCER = policy.Enforcer(cfg.CONF)
    ENFORCER.register_defaults(policies.list_rules())


def enforce(rule):
    def decorator(func):
        @functools.wraps(func)
        def handler(*args, **kwargs):
            ctx = context.ctx()
            ENFORCER.authorize(rule, {}, ctx.to_dict(), do_raise=True,
                               exc=exceptions.Forbidden)

            return func(*args, **kwargs)
        return handler

    return decorator

Use authorize instead of enforce for policies
Use authorize instead of enforce for policies

After fully implementing policies in code, the authorize method
can be safely used and its a safeguard against introducing
policies for some API which are not properly defined in the code.

Change-Id: I499f13c34027b217bf1de905f829f36ef919e3b8
