| /* |
| * 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()); |
| } |
| } |