Does someone have a valid example on CAS Proxy Granting Ticket?

Question

I need to implement a CAS Proxy Granting Ticket System.

So I need to understand the system. There is a good doc here, but I have no idea about the proxyCallback I need.

Could someone explain me that ?

Answer 1

The CAS will invoke the pgtURL to provide a special ticket that will enable that application to acquire new tickets for other applications.
This is the setup in web.xml:

<servlet>
    <servlet-name>casproxy</servlet-name>
    <servlet-class>edu.yale.its.tp.cas.proxy.ProxyTicketReceptor</servlet-class>
    <load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
  <servlet-name>casproxy</servlet-name>
  <url-pattern>/casProxy/*</url-pattern>
</servlet-mapping>

To get a new ticket for another service with the special ticket:

SecurityContext sc = SecurityContextHolder.getContext();
CasAuthenticationToken auth = (CasAuthenticationToken)sc.getAuthentication();
String pgtIOU = auth.getProxyGrantingTicketIou();
String newTicket = ProxyTicketReceptor.getProxyTicket(pgtIOU, anotherService);

Then you redirect to that service giving to it the new ticket.