def check_is_admin(context):
"""Verify context has admin rights according to policy settings."""
init()
# the target is user-self
credentials = context.to_dict()
target = credentials
# Backward compatibility: if ADMIN_CTX_POLICY is not
# found, default to validating role:admin
admin_policy = (ADMIN_CTX_POLICY in policy._rules
and ADMIN_CTX_POLICY or 'role:admin')
return policy.check(admin_policy, target, credentials)
def check_if_exists(context, action, target):
"""Verify if the action can be authorized, and raise if it is unknown.
Check whether the action can be performed on the target within this
context, and raise a PolicyRuleNotFound exception if the action is
not defined in the policy engine.
"""
# TODO(salvatore-orlando): Consider modifying oslo policy engine in
# order to allow to raise distinct exception when check fails and
# when policy is missing
# Raise if there's no match for requested action in the policy engine
if not policy._rules or action not in policy._rules:
raise exceptions.PolicyRuleNotFound(rule=action)
return policy.check(*(_prepare_check(context, action, target)))
def check(context, action, target, plugin=None):
"""Verifies that the action is valid on the target in this context.
:param context: crd context
:param action: string representing the action to be checked
this should be colon separated for clarity.
:param target: dictionary representing the object of the action
for object creation this should be a dictionary representing the
location of the object e.g. ``{'project_id': context.project_id}``
:param plugin: currently unused and deprecated.
Kept for backward compatibility.
:return: Returns True if access is permitted else False.
"""
return policy.check(*(_prepare_check(context, action, target)))
def enforce(context, action, target, plugin=None):
"""Verifies that the action is valid on the target in this context.
:param context: crd context
:param action: string representing the action to be checked
this should be colon separated for clarity.
:param target: dictionary representing the object of the action
for object creation this should be a dictionary representing the
location of the object e.g. ``{'project_id': context.project_id}``
:param plugin: currently unused and deprecated.
Kept for backward compatibility.
:raises crdservice.exceptions.PolicyNotAuthorized: if verification fails.
"""
init()
rule, target, credentials = _prepare_check(context, action, target)
result = policy.check(rule, target, credentials, action=action)
if not result:
LOG.debug(_("Failed policy check for '%s'"), action)
raise exceptions.PolicyNotAuthorized(action=action)
return result