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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.
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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/jdk/java/io/Serializable/longString/LongString.java Normal file
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/*
* Copyright (c) 1999, 2010, 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 4217676
* @summary Ensure that object streams support serialization of long strings
* (strings whose UTF representation > 64k in length)
* @key randomness
*/
import java.io.*;
import java.util.*;
public class LongString {
public static void main(String[] args) throws Exception {
Random rand = new Random(System.currentTimeMillis());
ByteArrayOutputStream bout;
ByteArrayInputStream bin;
ObjectOutputStream oout;
ObjectInputStream oin;
FileInputStream fin;
File mesgf;
// generate a long random string
StringBuffer sbuf = new StringBuffer();
for (int i = 0; i < 100000; i++)
sbuf.append((char) rand.nextInt(Character.MAX_VALUE + 1));
String str = sbuf.toString();
// write and read long string
bout = new ByteArrayOutputStream();
oout = new ObjectOutputStream(bout);
oout.writeObject(str);
oout.flush();
bin = new ByteArrayInputStream(bout.toByteArray());
oin = new ObjectInputStream(bin);
String strcopy = (String) oin.readObject();
if (! str.equals(strcopy))
throw new Error("deserialized long string not equal to original");
// test backwards compatibility
String mesg = "Message in golden file";
bout = new ByteArrayOutputStream();
oout = new ObjectOutputStream(bout);
oout.writeObject(mesg);
oout.flush();
byte[] buf1 = bout.toByteArray();
mesgf = new File(System.getProperty("test.src", "."), "mesg.ser");
fin = new FileInputStream(mesgf);
bout = new ByteArrayOutputStream();
try {
while (fin.available() > 0)
bout.write(fin.read());
} finally {
fin.close();
}
byte[] buf2 = bout.toByteArray();
if (! Arrays.equals(buf1, buf2))
throw new Error("incompatible string format (write)");
fin = new FileInputStream(mesgf);
try {
oin = new ObjectInputStream(fin);
String mesgcopy = (String) oin.readObject();
if (! mesg.equals(mesgcopy))
throw new Error("incompatible string format (read)");
} finally {
fin.close();
}
}
}