```
public interface KerberosTokenDecoder
```
This interface defines a pluggable way to obtain a session key given an AP-REQ Kerberos token and a Subject. The session key is needed on the receiving side when it is used for message signature or encryption. A default implementation is not shipped with WSS4J due to a dependency on internal APIs or ASN1 parsers.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`clear()`	Clear all internal information
`byte[]`	`getSessionKey()`	Get the session key from the token
`void`	`setSubject(Subject subject)`	Set the Subject
`void`	`setToken(byte[] token)`	Set the AP-REQ Kerberos Token

Interface KerberosTokenDecoder