The Kerberos V5 ("GSSAPI") SASL mechanism
The Simple Authentication and Security Layer (SASL, RFC 4422) is a framework for adding authentication support to connection-based protocols. This document describes the method for using the Generic Security Service Application Program Interface (GSS-API) Kerberos V5 in the SASL. This document replaces section 7.2 of RFC 2222, the definition of the "GSSAPI" SASL mechanism.