GetMethodsReturnClones.java revision 12745:f068a4ffddd2 
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 */
31import java.io.InputStream;
32import java.security.CodeSigner;
33import java.security.cert.Certificate;
34import java.util.*;
35import java.util.jar.*;
36
37public class GetMethodsReturnClones {
38
39    private static final 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}
79