1 /*
   2  * Copyright (c) 2000, 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 4325590
  27  * @library /lib/testlibrary
  28  * @build JarUtils A B
  29  * @run main SuperclassDataLossTest
  30  * @summary Verify that superclass data is not lost when incoming superclass
  31  *          descriptor is matched with local class that is not a superclass of
  32  *          the deserialized instance's class.
  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.net.URL;
  43 import java.net.URLClassLoader;
  44 import java.net.MalformedURLException;
  45 import java.nio.file.Files;
  46 import java.nio.file.Path;
  47 import java.nio.file.Paths;
  48 import java.nio.file.StandardCopyOption;
  49 
  50 class MixedSuperclassStream extends ObjectInputStream {
  51     private boolean ldr12A;
  52 
  53     MixedSuperclassStream(InputStream in, boolean ldr1First) throws IOException {
  54         super(in);
  55         this.ldr12A = ldr12A;
  56     }
  57 
  58     protected Class resolveClass(ObjectStreamClass desc)
  59         throws IOException, ClassNotFoundException
  60     {
  61         // resolve A's classdesc to class != B's superclass
  62         String name = desc.getName();
  63         if (ldr12A) {
  64             if (name.equals("A")) {
  65                 return Class.forName(name, true, SuperclassDataLossTest.ldr1);
  66             } else if (name.equals("B")) {
  67                 return Class.forName(name, true, SuperclassDataLossTest.ldr2);
  68             }
  69         } else {
  70             if (name.equals("B")) {
  71                 return Class.forName(name, true, SuperclassDataLossTest.ldr1);
  72             } else if (name.equals("A")) {
  73                 return Class.forName(name, true, SuperclassDataLossTest.ldr2);
  74             }
  75         }
  76         return super.resolveClass(desc);
  77     }
  78 }
  79 
  80 public class SuperclassDataLossTest {
  81 
  82     static URLClassLoader ldr1, ldr2;
  83     static {
  84         try {
  85             ldr1 = new URLClassLoader(new URL[] { new URL("file:cb1.jar") });
  86             ldr2 = new URLClassLoader(new URL[] { new URL("file:cb2.jar") });
  87         } catch (MalformedURLException ex) {
  88             throw new Error();
  89         }
  90     }
  91 
  92     public static void main(String[] args) throws Exception {
  93         setup();
  94 
  95         Runnable a = (Runnable) Class.forName("B", true, ldr1).newInstance();
  96         a.run();
  97 
  98         ByteArrayOutputStream bout = new ByteArrayOutputStream();
  99         ObjectOutputStream oout = new ObjectOutputStream(bout);
 100         oout.writeObject(a);
 101         oout.close();
 102 
 103         test(bout, true);
 104         test(bout, false);
 105 
 106         ldr1.close();
 107         ldr2.close();
 108     }
 109 
 110     private static void test(ByteArrayOutputStream bout, boolean ldr12A) throws Exception {
 111         ByteArrayInputStream bin =
 112             new ByteArrayInputStream(bout.toByteArray());
 113         ObjectInputStream oin = new MixedSuperclassStream(bin, ldr12A);
 114         Runnable a = (Runnable) oin.readObject();
 115         a.run();
 116     }
 117 
 118     private static void setup() throws Exception {
 119         Path classes = Paths.get(System.getProperty("test.classes", ""));
 120         JarUtils.createJarFile(Paths.get("cb1.jar"), classes,
 121                 classes.resolve("A.class"), classes.resolve("B.class"));
 122         Files.copy(Paths.get("cb1.jar"), Paths.get("cb2.jar"),
 123                    StandardCopyOption.REPLACE_EXISTING);
 124     }
 125 }