1 /*
   2  * Copyright (c) 2002, 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 /*
  25  * @test
  26  * @bug 4765255
  27  * @library /lib/testlibrary
  28  * @build JarUtils A B C D PackageAccessTest
  29  * @run main PackageAccessTest
  30  * @summary Verify proper functioning of package equality checks used to
  31  *          determine accessibility of superclass constructor and inherited
  32  *          writeReplace/readResolve methods.
  33  */
  34 
  35 import java.io.ByteArrayInputStream;
  36 import java.io.ByteArrayOutputStream;
  37 import java.io.InputStream;
  38 import java.io.IOException;
  39 import java.io.ObjectInputStream;
  40 import java.io.ObjectOutputStream;
  41 import java.io.ObjectStreamClass;
  42 import java.io.InvalidClassException;
  43 import java.net.URL;
  44 import java.net.URLClassLoader;
  45 import java.nio.file.Files;
  46 import java.nio.file.Path;
  47 import java.nio.file.Paths;
  48 
  49 public class PackageAccessTest {
  50 
  51     static Class bcl;
  52     static Class dcl;
  53 
  54     public static void main(String[] args) throws Exception {
  55         setup();
  56 
  57         try (URLClassLoader ldr =
  58             new URLClassLoader(new URL[]{ new URL("file:foo.jar") },
  59                     PackageAccessTest.class.getClassLoader())) {
  60             bcl = Class.forName("B", true, ldr);
  61             dcl = Class.forName("D", true, ldr);
  62     
  63             Object b = bcl.newInstance();
  64             try {
  65                 swizzle(b);
  66                 throw new Error("expected InvalidClassException for class B");
  67             } catch (InvalidClassException e) {
  68                 System.out.println("caught " + e);
  69                 e.printStackTrace();
  70             }
  71             if (A.packagePrivateConstructorInvoked) {
  72                 throw new Error("package private constructor of A invoked");
  73             }
  74     
  75             Object d = dcl.newInstance();
  76             swizzle(d);
  77         }
  78     }
  79 
  80     static void swizzle(Object obj) throws Exception {
  81         ByteArrayOutputStream bout = new ByteArrayOutputStream();
  82         ObjectOutputStream oout = new ObjectOutputStream(bout);
  83         oout.writeObject(obj);
  84         oout.close();
  85         ByteArrayInputStream bin =
  86             new ByteArrayInputStream(bout.toByteArray());
  87         new TestObjectInputStream(bin).readObject();
  88     }
  89 
  90     static void setup() throws Exception {
  91         Path classes = Paths.get(System.getProperty("test.classes", ""));
  92         JarUtils.createJarFile(Paths.get("foo.jar"), classes,
  93                 classes.resolve("B.class"), classes.resolve("D.class"));
  94         Files.delete(classes.resolve("B.class"));
  95         Files.delete(classes.resolve("D.class"));
  96     }
  97 }
  98 
  99 class TestObjectInputStream extends ObjectInputStream {
 100     TestObjectInputStream(InputStream in) throws IOException {
 101         super(in);
 102     }
 103 
 104     protected Class resolveClass(ObjectStreamClass desc)
 105         throws IOException, ClassNotFoundException
 106     {
 107         String n = desc.getName();
 108         if (n.equals("B")) {
 109             return PackageAccessTest.bcl;
 110         } else if (n.equals("D")) {
 111             return PackageAccessTest.dcl;
 112         } else {
 113             return super.resolveClass(desc);
 114         }
 115     }
 116 }