103 lines
3.1 KiB
Python
103 lines
3.1 KiB
Python
# Copyright 2015 Hewlett Packard Enterprise Development LP
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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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from kosmos._i18n import _
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from kosmos._i18n import _LI
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from kosmos.common import config
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from kosmos.common import exceptions
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_policy import opts
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from oslo_policy import policy
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CONF = cfg.CONF
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# Add the default policy opts
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opts.set_defaults(CONF)
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LOG = logging.getLogger(__name__)
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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 = policy.Rules.from_dict(data, 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):
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policy_files = config.find_config(CONF['oslo_policy'].policy_file)
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if len(policy_files) == 0:
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msg = 'Unable to determine appropriate policy json file'
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raise exceptions.ConfigurationError(msg)
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LOG.info(_LI('Using policy_file found at: %s'), policy_files[0])
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with open(policy_files[0]) as fh:
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policy_string = fh.read()
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rules = policy.Rules.load_json(policy_string, default_rule=default_rule)
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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(CONF)
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_ENFORCER.set_rules(rules)
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def check(rule, ctxt, target=None, do_raise=True, exc=exceptions.Forbidden):
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creds = ctxt.to_dict()
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target = target or {}
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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.info(_("Policy check succeeded for rule '%(rule)s' "
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"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.info(_("Policy check failed for rule '%(rule)s' "
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"on target %(target)s"),
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{'rule': rule, 'target': repr(target)}, extra=extra)
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