TcpTimeout.java

/*
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 * 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.
 *
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 */

/*
 * @test
 * @bug 6952519
 * @run main/othervm TcpTimeout
 * @summary kdc_timeout is not being honoured when using TCP
 */

import java.io.*;
import java.net.ServerSocket;
import sun.security.krb5.Config;

public class TcpTimeout {
    public static void main(String[] args)
            throws Exception {

        // Set debug to grab debug output like ">>> KDCCommunication"
        System.setProperty("sun.security.krb5.debug", "true");

        // Called before new ServerSocket on p1 and p2 to make sure
        // customized nameservice is used
        KDC k = new KDC(OneKDC.REALM, OneKDC.KDCHOST, 0, true);
        int p3 = k.getPort();
        k.addPrincipal(OneKDC.USER, OneKDC.PASS);
        k.addPrincipalRandKey("krbtgt/" + OneKDC.REALM);

        // Start two listener that does not communicate, simulate timeout
        int p1 = new ServerSocket(0).getLocalPort();
        int p2 = new ServerSocket(0).getLocalPort();

        FileWriter fw = new FileWriter("alternative-krb5.conf");

        fw.write("[libdefaults]\n" +
                "udp_preference_limit = 1\n" +
                "max_retries = 2\n" +
                "default_realm = " + OneKDC.REALM + "\n" +
                "kdc_timeout = 5000\n");
        fw.write("[realms]\n" + OneKDC.REALM + " = {\n" +
                "kdc = " + OneKDC.KDCHOST + ":" + p1 + "\n" +
                "kdc = " + OneKDC.KDCHOST + ":" + p2 + "\n" +
                "kdc = " + OneKDC.KDCHOST + ":" + p3 + "\n" +
                "}\n");

        fw.close();
        System.setProperty("java.security.krb5.conf", "alternative-krb5.conf");
        Config.refresh();

        System.out.println("Ports opened on " + p1 + ", " + p2 + ", " + p3);

        // The correct behavior should be:
        // 5 sec on p1, 5 sec on p1, fail
        // 5 sec on p2, 5 sec on p2, fail
        // p3 ok, p3 ok again for preauth.
        // The total time should be 20sec + 2x. x is processing time for AS-REQ.
        int count = 6;
        long start = System.currentTimeMillis();

        ByteArrayOutputStream bo = new ByteArrayOutputStream();
        PrintStream oldout = System.out;
        System.setOut(new PrintStream(bo));
        Context c = Context.fromUserPass(OneKDC.USER, OneKDC.PASS, false);
        System.setOut(oldout);

        String[] lines = new String(bo.toByteArray()).split("\n");
        for (String line: lines) {
            if (line.startsWith(">>> KDCCommunication")) {
                System.out.println(line);
                count--;
            }
        }
        if (count != 0) {
            throw new Exception("Retry count is " + count + " less");
        }

        long end = System.currentTimeMillis();
        if ((end - start)/1000L < 20) {
            throw new Exception("Too fast? " + (end - start)/1000L);
        }
    }
}