1 /*
   2  * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 import java.io.File;
  25 import java.io.FileWriter;
  26 import java.io.IOException;
  27 import java.io.PrintWriter;
  28 import java.util.HashMap;
  29 import java.util.Map;
  30 import javax.security.auth.callback.CallbackHandler;
  31 import javax.security.auth.login.LoginContext;
  32 import javax.security.auth.login.LoginException;
  33 
  34 /*
  35  * @test
  36  * @bug 4515853 8075297
  37  * @summary Checks that Kerberos client tries slave KDC
  38  *          if master KDC is not responding
  39  * @run main/othervm BogusKDC
  40  */
  41 public class BogusKDC {
  42 
  43     static final String TEST_SRC = System.getProperty("test.src", ".");
  44     static final String HOST = "localhost";
  45     static final String NOT_EXISTING_HOST = "not.existing.host";
  46     static final String REALM = "TEST.REALM";
  47     static final String USER = "USER";
  48     static final String USER_PRINCIPAL = USER + "@" + REALM;
  49     static final String USER_PASSWORD = "password";
  50     static final String KRBTGT_PRINCIPAL = "krbtgt/" + REALM;
  51     static final String KRB5_CONF = "krb5.conf";
  52     static final int WRONG_KDC_PORT = 21;
  53 
  54     static final String KRB5_CONF_TEMPLATE = ""
  55             + "[libdefaults]\n"
  56             + "default_realm = TEST.REALM\n"
  57             + "max_retries = 1\n"
  58             + "\n"
  59             + "[realms]\n"
  60             + "TEST.REALM = {\n"
  61             + "    kdc = %s\n"
  62             + "    kdc = localhost:%d\n"
  63             + "}";
  64 
  65     public static void main(String[] args) throws LoginException, IOException {
  66         Map<String, String> principals = new HashMap<>();
  67         principals.put(USER_PRINCIPAL, USER_PASSWORD);
  68         principals.put(KRBTGT_PRINCIPAL, null);
  69 
  70         System.setProperty("java.security.krb5.conf", KRB5_CONF);
  71 
  72         // start a local KDC
  73         KDC kdc = KDC.startKDC(HOST, KRB5_CONF, REALM, principals, null, null);
  74 
  75         System.setProperty("java.security.auth.login.config",
  76                 TEST_SRC + File.separator + "refreshKrb5Config.jaas");
  77 
  78         CallbackHandler handler = new Helper.UserPasswordHandler(
  79                 USER, USER_PASSWORD);
  80 
  81         // create a krb5 config with non-existing host for master KDC,
  82         // and wrong port for slave KDC
  83         try (PrintWriter w = new PrintWriter(new FileWriter(KRB5_CONF))) {
  84             w.write(String.format(KRB5_CONF_TEMPLATE,
  85                     KDC.NOT_EXISTING_HOST, WRONG_KDC_PORT));
  86             w.flush();
  87         }
  88 
  89         // login with not-refreshable config
  90         try {
  91             new LoginContext("NotRefreshable", handler).login();
  92             throw new RuntimeException("Expected exception not thrown");
  93         } catch (LoginException le) {
  94             System.out.println("Expected login failure: " + le);
  95         }
  96 
  97         // create a krb5 config with non-existing host for master KDC,
  98         // but correct port for slave KDC
  99         try (PrintWriter w = new PrintWriter(new FileWriter(KRB5_CONF))) {
 100             w.write(String.format(KRB5_CONF_TEMPLATE,
 101                     KDC.NOT_EXISTING_HOST, kdc.getPort()));
 102             w.flush();
 103         }
 104 
 105         // login with not-refreshable config
 106         try {
 107             new LoginContext("NotRefreshable", handler).login();
 108             throw new RuntimeException("Expected exception not thrown");
 109         } catch (LoginException le) {
 110             System.out.println("Expected login failure: " + le);
 111         }
 112 
 113         // login with refreshable config
 114         new LoginContext("Refreshable", handler).login();
 115 
 116         System.out.println("Test passed");
 117     }
 118 }