5. Error Codes

This page describes the errors that can occur during federation.

5.1. Authentication Errors

TODO for now, we only describe the errors here. Later, we should add exact error codes.

TODO we might want to merge one or more of these errors

• authentication error: occurs when a backend queries another backend and provides either no client certificate, or a client certificate that the receiving backend cannot authenticate

• authorization error: occurs when a sending backend authenticates successfully, but is not on the allow list of the receiving backend

• discovery error: occurs when a sending backend authenticates successfully, but the SRV record published for the claimed domain of the sending backend doesn’t match the SAN of the sending backend’s client certificate