1 /* 2 * Copyright (c) 2014, 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 /* 25 * @test 26 * @bug 8048073 27 * @summary Cannot read ccache entry with a realm-less service name 28 * @compile -XDignore.symbol.file EmptyRealmCC.java 29 * @run main EmptyRealmCC 30 */ 31 import java.nio.file.Files; 32 import java.nio.file.Paths; 33 34 import sun.security.krb5.internal.ccache.CredentialsCache; 35 36 public class EmptyRealmCC { 37 public static void main(String[] args) throws Exception { 38 byte[] ccache = TimeInCCache.ccache; 39 40 // The service name starts at 0x52: 41 // 42 // 0050: 00 00 00 02 00 00 00 0A 4D 41 58 49 2E 4C 43 // ----------- ----------- 44 // 0060: 4F 43 41 4C 00 00 00 06 6B 72 62 74 67 74 00 00 45 // ----------- ----- 46 // 0070: 00 0A 4D 41 58 49 2E 4C 4F 43 41 4C 47 // ----- 48 // 49 // which contains 2 (the length of names), a 10-byte realm, a 6-byte 50 // name[0], and a 10-byte name[1]. 51 52 // We will empty the realm, and pack the realm string to another 53 // name (6-byte ".LOCAL"). Finally "krbtgt/MAXI.LOCAL@MAXI.LOCAL" 54 // becomes ".LOCAL/krbtgt/MAXI.LOCAL@". 55 56 // length of names is now 3 57 ccache[0x55] = 3; 58 // The empty realm 59 System.arraycopy(new byte[4], 0, ccache, 0x56, 4); 60 // Length of inserted name is 6 61 System.arraycopy(new byte[]{0,0,0,6}, 0, ccache, 0x5A, 4); 62 63 Files.write(Paths.get("tmpcc"), TimeInCCache.ccache); 64 if (CredentialsCache.getInstance("tmpcc").getCredsList() != null) { 65 throw new Exception("Nothing should be there"); 66 } 67 } 68 }