public static void main(String[] args) throws Exception {
Oid mech;
if (args[0].equals("spnego")) {
mech = GSSUtil.GSS_SPNEGO_MECH_OID;
} else if (args[0].contains("krb5")) {
mech = GSSUtil.GSS_KRB5_MECH_OID;
} else {
throw new Exception("Unknown mech");
}
OneKDC kdc = new OneKDC(null);
kdc.writeJAASConf();
kdc.setOption(KDC.Option.PREAUTH_REQUIRED, false);
Map<String, List<String>> map = new HashMap<>();
map.put(
OneKDC.SERVER + "@" + OneKDC.REALM,
Arrays.asList(new String[] {OneKDC.BACKEND + "@" + OneKDC.REALM}));
kdc.setOption(KDC.Option.ALLOW_S4U2PROXY, map);
Context c, s, b;
c = Context.fromJAAS("client");
s = Context.fromJAAS("server");
b = Context.fromJAAS("backend");
c.startAsClient(OneKDC.SERVER, mech);
s.startAsServer(null, mech, false);
Context.handshake(c, s);
Context p = s.delegated();
p.startAsClient(OneKDC.BACKEND, mech);
b.startAsServer(mech);
Context.handshake(p, b);
p.startAsClient(OneKDC.BACKEND, mech);
b.startAsServer(mech);
Context.handshake(p, b);
}
