Commit b2203961 authored by Jérome Perrin's avatar Jérome Perrin

patches/Restricted: fix access check for type

On python2, attributes of new style classes (classes, not instances)
were not properly validated. On python3, attributes of classes were not.
parent 5c73f697
......@@ -124,26 +124,37 @@ class TypeAccessChecker:
as "a method which returing a method" because we can not know what is the
type until it is actually called. So the three ways are simulated the
function returned by this method.
We don't return a simple function, but a class instance with a __bool__ method
to accomodate the two cases where this is called by SecurityManager.validate when
checking access on the class (then only the bool is used) or by guarded_getattr
when checking access on the instance (the __call__ is used).
"""
def factory(inst, name):
"""
Check function used with ContainerAssertions checked by cAccessControl.
"""
access = _safe_class_attribute_dict.get(inst, 0)
# The next 'dict' only checks the access configuration type
if access == 1 or (isinstance(access, dict) and access.get(name, 0) == 1):
pass
elif isinstance(access, dict) and callable(access.get(name, 0)):
guarded_method = access.get(name)
return guarded_method(inst, name)
elif callable(access):
# Only check whether the access configuration raise error or not
access(inst, name)
else:
# fallback to default security
aq_acquire(inst, name, aq_validate, getSecurityManager().validate)
return v
return factory
class _AccessChecker:
def __call__(self, inst, name):
"""
Check function used with ContainerAssertions checked by cAccessControl.
"""
access = _safe_class_attribute_dict.get(inst, 0)
# The next 'dict' only checks the access configuration type
if access == 1 or (isinstance(access, dict) and access.get(name, 0) == 1):
pass
elif isinstance(access, dict) and callable(access.get(name, 0)):
guarded_method = access.get(name)
return guarded_method(inst, name)
elif callable(access):
# Only check whether the access configuration raise error or not
access(inst, name)
else:
# fallback to default security
aq_acquire(inst, name, aq_validate, getSecurityManager().validate)
return v
def __bool__(self):
return False
__nonzero__ = __bool__ # six.PY2
return _AccessChecker()
def __bool__(self):
# If Containers(type(x)) is true, ZopeGuard checks will short circuit,
......
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