98 lines
3.0 KiB
Python
98 lines
3.0 KiB
Python
# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
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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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# Based on designate/policy.py
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from oslo_config import cfg
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from webob import exc as exceptions
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from murano.common.i18n import _
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import murano.openstack.common.log as logging
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from murano.openstack.common import policy
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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_ENFORCER = None
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def reset():
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global _ENFORCER
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if _ENFORCER:
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_ENFORCER.clear()
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_ENFORCER = None
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def set_rules(data, default_rule=None, overwrite=True):
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default_rule = default_rule or cfg.CONF.policy_default_rule
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if not _ENFORCER:
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LOG.debug("Enforcer not present, recreating at rules stage.")
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init()
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if default_rule:
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_ENFORCER.default_rule = default_rule
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msg = "Loading rules %s, default: %s, overwrite: %s"
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LOG.debug(msg, data, default_rule, overwrite)
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if isinstance(data, dict):
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rules = dict((k, policy.parse_rule(v)) for k, v in data.items())
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rules = policy.Rules(rules, default_rule)
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else:
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rules = policy.Rules.load_json(data, default_rule)
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_ENFORCER.set_rules(rules, overwrite=overwrite)
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def init(default_rule=None, use_conf=True):
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global _ENFORCER
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if not _ENFORCER:
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LOG.debug("Enforcer is not present, recreating.")
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_ENFORCER = policy.Enforcer(use_conf=use_conf)
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_ENFORCER.load_rules()
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def check(rule, ctxt, target={}, do_raise=True, exc=exceptions.HTTPForbidden):
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creds = ctxt.to_dict()
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try:
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result = _ENFORCER.enforce(rule, target, creds, do_raise, exc)
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except Exception:
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result = False
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raise
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else:
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return result
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finally:
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extra = {'policy': {'rule': rule, 'target': target}}
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if result:
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LOG.audit(_("Policy check succeeded for rule "
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"'%(rule)s' on target %(target)s"),
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{'rule': rule, 'target': repr(target)}, extra=extra)
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else:
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LOG.audit(_("Policy check failed for rule "
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"'%(rule)s' on target: %(target)s"),
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{'rule': rule, 'target': repr(target)}, extra=extra)
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def check_is_admin(context):
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"""Check if the given context is associated with an admin role.
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:param context: Murano request context
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:returns: A non-False value if context role is admin.
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"""
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return check('context_is_admin', context,
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context.to_dict(), do_raise=False)
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