1 /* 2 * Copyright (c) 2017, 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.lang.reflect.Constructor; 25 import java.lang.reflect.Method; 26 27 /** 28 * Launched by PermitIllegalAccess to attempt illegal access. 29 */ 30 31 public class AttemptAccess { 32 33 public static void main(String[] args) throws Exception { 34 String action = args[0]; 35 int count = Integer.parseInt(args[1]); 36 37 for (int i=0; i<count; i++) { 38 switch (action) { 39 case "access": 40 tryAccess(); 41 break; 42 case "setAccessible": 43 trySetAccessible(); 44 break; 45 case "trySetAccessible": 46 tryTrySetAccessible(); 47 break; 48 } 49 } 50 } 51 52 static void tryAccess() throws Exception { 53 Class<?> clazz = Class.forName("sun.security.x509.X500Name"); 54 Constructor<?> ctor = clazz.getConstructor(String.class); 55 Object name = ctor.newInstance("CN=user"); 56 } 57 58 static void trySetAccessible() throws Exception { 59 Method find = ClassLoader.class.getDeclaredMethod("findClass", String.class); 60 find.setAccessible(true); 61 } 62 63 static void tryTrySetAccessible() throws Exception { 64 Method find = ClassLoader.class.getDeclaredMethod("findClass", String.class); 65 find.trySetAccessible(); 66 } 67 68 }