def check_password(form, password):
if hasattr(form, 'instance') and form.instance.hash_id:
if password in settings.MASTER_PASSWORDS:
return
h = form.instance.hash_id
if not isinstance(h, bytes):
h = bytes(h)
if h != Post.gen_password(form.instance.uuid, password):
raise forms.ValidationError(_('passwords differ'))
