1 /*
   2  * Copyright (c) 2005, 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 6337925
  27  * @summary Ensure that callers cannot modify the internal JarEntry cert and
  28  *          codesigner arrays.
  29  * @author Sean Mullan
  30  */
  31 import java.io.InputStream;
  32 import java.security.CodeSigner;
  33 import java.security.cert.Certificate;
  34 import java.util.*;
  35 import java.util.jar.*;
  36 
  37 public class GetMethodsReturnClones {
  38 
  39     private final static String BASE = System.getProperty("test.src", ".") +
  40         System.getProperty("file.separator");
  41 
  42     public static void main(String[] args) throws Exception {
  43         List<JarEntry> entries = new ArrayList<>();
  44         try (JarFile jf = new JarFile(BASE + "test.jar", true)) {
  45             byte[] buffer = new byte[8192];
  46             Enumeration<JarEntry> e = jf.entries();
  47             while (e.hasMoreElements()) {
  48                 JarEntry je = e.nextElement();
  49                 entries.add(je);
  50                 try (InputStream is = jf.getInputStream(je)) {
  51                     while (is.read(buffer, 0, buffer.length) != -1) {
  52                         // we just read. this will throw a SecurityException
  53                         // if  a signature/digest check fails.
  54                     }
  55                 }
  56             }
  57         }
  58 
  59         for (JarEntry je : entries) {
  60             Certificate[] certs = je.getCertificates();
  61             CodeSigner[] signers = je.getCodeSigners();
  62             if (certs != null) {
  63                 certs[0] = null;
  64                 certs = je.getCertificates();
  65                 if (certs[0] == null) {
  66                     throw new Exception("Modified internal certs array");
  67                 }
  68             }
  69             if (signers != null) {
  70                 signers[0] = null;
  71                 signers = je.getCodeSigners();
  72                 if (signers[0] == null) {
  73                     throw new Exception("Modified internal codesigners array");
  74                 }
  75             }
  76         }
  77     }
  78 }