1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4253271
* @summary Ensure that ObjectInputStream.readObject() is called, it doesn't
* read past the end of the object in the underlying stream.
*/
import java.io.*;
class LimitInputStream extends ByteArrayInputStream {
int limit;
LimitInputStream(byte[] b) {
super(b);
limit = b.length;
}
public int read() {
if (limit < 1)
throw new Error("limit exceeded");
int c = super.read();
if (c != -1)
limit--;
return c;
}
public int read(byte[] b) {
return read(b, 0, b.length);
}
public int read(byte[] b, int off, int len) {
if (limit < len)
throw new Error("limit exceeded");
int n = super.read(b, off, len);
if (n != -1)
limit -= n;
return n;
}
}
public class ReadPastObject {
public static void main(String[] args) throws Exception {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(bout);
oout.writeObject("foo");
LimitInputStream lin = new LimitInputStream(bout.toByteArray());
ObjectInputStream oin = new ObjectInputStream(lin);
System.out.println(oin.readObject());
}
}
|
