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/*
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* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6844193
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* @run main/timeout=300 MaxRetries
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* @summary support max_retries in krb5.conf
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*/
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import java.io.*;
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import java.security.Security;
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public class MaxRetries {
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public static void main(String[] args)
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throws Exception {
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System.setProperty("sun.security.krb5.debug", "true");
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new OneKDC(null).writeJAASConf();
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System.setProperty("java.security.krb5.conf", "alternative-krb5.conf");
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// For tryLast
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Security.setProperty("krb5.kdc.bad.policy", "trylast");
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rewriteMaxRetries(4);
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test1(4000, 6); // 1 1 1 1 2 2
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test1(4000, 2); // 2 2
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rewriteMaxRetries(1);
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test1(1000, 3); // 1 2 2
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test1(1000, 2); // 2 2
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rewriteMaxRetries(-1);
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test1(5000, 4); // 1 1 2 2
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test1(5000, 2); // 2 2
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// For tryLess
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Security.setProperty("krb5.kdc.bad.policy", "tryless");
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rewriteMaxRetries(4);
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test1(4000, 7); // 1 1 1 1 2 1 2
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test1(4000, 4); // 1 2 1 2
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rewriteMaxRetries(1);
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test1(1000, 4); // 1 2 1 2
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test1(1000, 4); // 1 2 1 2
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rewriteMaxRetries(-1);
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test1(5000, 5); // 1 1 2 1 2
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test1(5000, 4); // 1 2 1 2
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rewriteUdpPrefLimit(-1, -1); // default, no limit
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test2("UDP");
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rewriteUdpPrefLimit(10, -1); // global rules
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test2("TCP");
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rewriteUdpPrefLimit(10, 10000); // realm rules
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test2("UDP");
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rewriteUdpPrefLimit(10000, 10); // realm rules
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test2("TCP");
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}
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/**
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* One round of test for max_retries and timeout.
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* @param timeout the expected timeout
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* @param count the expected total try
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*/
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private static void test1(int timeout, int count) throws Exception {
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String timeoutTag = "timeout=" + timeout;
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ByteArrayOutputStream bo = new ByteArrayOutputStream();
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PrintStream oldout = System.out;
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System.setOut(new PrintStream(bo));
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Context c = Context.fromJAAS("client");
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System.setOut(oldout);
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String[] lines = new String(bo.toByteArray()).split("\n");
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System.out.println("----------------- TEST (" + timeout + "," +
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count + ") -----------------");
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for (String line: lines) {
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if (line.startsWith(">>> KDCCommunication")) {
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System.out.println(line);
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if (line.indexOf(timeoutTag) < 0) {
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throw new Exception("Wrong timeout value");
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}
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count--;
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}
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}
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if (count != 0) {
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throw new Exception("Retry count is " + count + " less");
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}
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}
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/**
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* One round of test for udp_preference_limit.
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* @param proto the expected protocol used
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*/
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private static void test2(String proto) throws Exception {
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ByteArrayOutputStream bo = new ByteArrayOutputStream();
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PrintStream oldout = System.out;
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System.setOut(new PrintStream(bo));
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Context c = Context.fromJAAS("client");
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System.setOut(oldout);
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int count = 2;
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String[] lines = new String(bo.toByteArray()).split("\n");
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System.out.println("----------------- TEST -----------------");
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for (String line: lines) {
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if (line.startsWith(">>> KDCCommunication")) {
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System.out.println(line);
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count--;
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if (line.indexOf(proto) < 0) {
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throw new Exception("Wrong timeout value");
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}
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}
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}
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if (count != 0) {
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throw new Exception("Retry count is " + count + " less");
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}
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}
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/**
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* Set udp_preference_limit for global and realm
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*/
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private static void rewriteUdpPrefLimit(int global, int realm)
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throws Exception {
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BufferedReader fr = new BufferedReader(new FileReader(OneKDC.KRB5_CONF));
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FileWriter fw = new FileWriter("alternative-krb5.conf");
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while (true) {
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String s = fr.readLine();
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if (s == null) {
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break;
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}
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if (s.startsWith("[realms]")) {
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// Reconfig global setting
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if (global != -1) {
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fw.write("udp_preference_limit = " + global + "\n");
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}
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} else if (s.trim().startsWith("kdc = ")) {
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if (realm != -1) {
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// Reconfig for realm
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fw.write(" udp_preference_limit = " + realm + "\n");
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}
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}
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fw.write(s + "\n");
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}
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fr.close();
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fw.close();
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sun.security.krb5.Config.refresh();
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}
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/**
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* Set max_retries and timeout value for realm. The global value is always
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* 2 and 5000.
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* @param value max_retries and timeout/1000 for a realm, -1 means none.
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*/
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private static void rewriteMaxRetries(int value) throws Exception {
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BufferedReader fr = new BufferedReader(new FileReader(OneKDC.KRB5_CONF));
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FileWriter fw = new FileWriter("alternative-krb5.conf");
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while (true) {
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String s = fr.readLine();
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if (s == null) {
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break;
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}
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if (s.startsWith("[realms]")) {
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// Reconfig global setting
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fw.write("max_retries = 2\n");
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fw.write("kdc_timeout = 5000\n");
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} else if (s.trim().startsWith("kdc = ")) {
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if (value != -1) {
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// Reconfig for realm
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fw.write(" max_retries = " + value + "\n");
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fw.write(" kdc_timeout = " + (value*1000) + "\n");
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}
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// Add a bad KDC as the first candidate
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fw.write(" kdc = localhost:33333\n");
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}
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fw.write(s + "\n");
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}
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fr.close();
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fw.close();
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sun.security.krb5.Config.refresh();
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}
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}
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