--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/sun/security/krb5/auto/TwoPrinces.java	Wed Apr 20 18:41:32 2011 +0800
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 6894072
+ * @compile -XDignore.symbol.file TwoPrinces.java
+ * @run main/othervm TwoPrinces
+ * @summary always refresh keytab
+ */
+
+import java.io.File;
+import java.io.FileOutputStream;
+import sun.security.jgss.GSSUtil;
+import sun.security.krb5.Config;
+
+public class TwoPrinces {
+
+    public static void main(String[] args)
+            throws Exception {
+
+        KDC k1 = KDC.create("R1");
+        k1.addPrincipal("u1", "hello".toCharArray());
+        k1.addPrincipalRandKey("krbtgt/R1");
+        k1.addPrincipalRandKey("host/same.host");
+
+        KDC k2 = KDC.create("R2");
+        k2.addPrincipal("u2", "hello".toCharArray());
+        k2.addPrincipalRandKey("krbtgt/R2");
+        k2.addPrincipalRandKey("host/same.host");
+
+        System.setProperty("java.security.krb5.conf", "krb5.conf");
+
+        // R1 is the default realm now
+        KDC.saveConfig("krb5.conf", k1, k2);
+        Config.refresh();
+
+        k1.writeKtab("ktab1");
+        k2.writeKtab("ktab2");
+
+        // A JAAS config file with 2 Krb5LoginModules, after commit, the
+        // subject with have principals and keytabs from both sides
+        System.setProperty("java.security.auth.login.config", "jaas.conf");
+        File f = new File("jaas.conf");
+        FileOutputStream fos = new FileOutputStream(f);
+        fos.write((
+                "me {\n"
+                + "  com.sun.security.auth.module.Krb5LoginModule required"
+                + "    isInitiator=true principal=\"host/same.host@R1\""
+                + "    useKeyTab=true keyTab=ktab1 storeKey=true;\n"
+                + "  com.sun.security.auth.module.Krb5LoginModule required"
+                + "    isInitiator=true principal=\"host/same.host@R2\""
+                + "    useKeyTab=true keyTab=ktab2 storeKey=true;\n"
+                + "};\n"
+                ).getBytes());
+        fos.close();
+
+        /*
+         * This server side context will be able to act as services in both
+         * realms. Please note that we still don't support a single instance
+         * of server to accept connections from two realms at the same time.
+         * Therefore, we must call startAsServer in a given realm to start
+         * working there. The same Subject never changes anyway.
+         */
+        Context s = Context.fromJAAS("me");
+
+        // Default realm still R1
+        s.startAsServer("host@same.host", GSSUtil.GSS_KRB5_MECH_OID);
+        Context c1 = Context.fromUserPass("u1", "hello".toCharArray(), false);
+        c1.startAsClient("host@same.host", GSSUtil.GSS_KRB5_MECH_OID);
+        Context.handshake(c1, s);
+
+        KDC.saveConfig("krb5.conf", k2, k1);
+        Config.refresh();
+
+        // Default realm now R2
+        s.startAsServer("host@same.host", GSSUtil.GSS_KRB5_MECH_OID);
+        Context c2 = Context.fromUserPass("u2", "hello".toCharArray(), false);
+        c2.startAsClient("host@same.host", GSSUtil.GSS_KRB5_MECH_OID);
+        Context.handshake(c2, s);
+    }
+}