1 /* 2 * Copyright 2005-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6578538 27 * @summary com.sun.crypto.provider.SunJCE instance leak using KRB5 and 28 * LoginContext 29 * @author Brad Wetmore 30 * 31 * @run main/othervm -Xmx2m TestProviderLeak 32 */ 33 34 /* 35 * We force the leak to become a problem by specifying the minimum 36 * size heap we can (above). In current runs on a server and client 37 * machine, it took roughly 220-240 iterations to have the memory leak 38 * shut down other operations. It complained about "Unable to verify 39 * the SunJCE provider." 40 */ 41 42 import javax.crypto.*; 43 import javax.crypto.spec.*; 44 45 public class TestProviderLeak { 46 private static void dumpMemoryStats(String s) throws Exception { 47 Runtime rt = Runtime.getRuntime(); 48 System.out.println(s + ":\t" + 49 rt.freeMemory() + " bytes free"); 50 } 51 52 public static void main(String [] args) throws Exception { 53 SecretKeyFactory skf = 54 SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1", "SunJCE"); 55 PBEKeySpec pbeKS = new PBEKeySpec( 56 "passPhrase".toCharArray(), new byte [] { 0 }, 5, 512); 57 for (int i = 0; i <= 600; i++) { 58 try { 59 skf.generateSecret(pbeKS); 60 if ((i % 20) == 0) { 61 // Calling gc() isn't dependable, but doesn't hurt. 62 // Gives better output in leak cases. 63 System.gc(); 64 dumpMemoryStats("Iteration " + i); 65 } 66 } catch (Exception e) { 67 dumpMemoryStats("\nException seen at iteration " + i); 68 throw e; 69 } 70 } 71 } 72 }