1 /*
2  * Copyright (c) 2005, 2011, 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 static final String BASE = System.getProperty("test.src", ".") +
40         System.getProperty("file.separator");
41 
main(String[] args)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 }
79