| /* |
| * Copyright (c) 1998, 2015, 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 0000000 |
| * @summary FlushBug |
| * @author Jan Luehe |
| * @key randomness |
| */ |
| import java.io.*; |
| import java.security.*; |
| import javax.crypto.*; |
| import javax.crypto.spec.*; |
| |
| public class FlushBug { |
| public static void main(String[] args) throws Exception { |
| SecureRandom sr = new SecureRandom(); |
| |
| // Create new DES key. |
| KeyGenerator kg = KeyGenerator.getInstance("DES", "SunJCE"); |
| kg.init(sr); |
| Key key = kg.generateKey(); |
| |
| // Generate an IV. |
| byte[] iv_bytes = new byte[8]; |
| sr.nextBytes(iv_bytes); |
| IvParameterSpec iv = new IvParameterSpec(iv_bytes); |
| |
| // Create the consumer |
| Cipher decrypter = Cipher.getInstance("DES/CFB8/NoPadding", "SunJCE"); |
| decrypter.init(Cipher.DECRYPT_MODE, key, iv); |
| PipedInputStream consumer = new PipedInputStream(); |
| InputStream in = new CipherInputStream(consumer, decrypter); |
| |
| // Create the producer |
| Cipher encrypter = Cipher.getInstance("DES/CFB8/NoPadding", "SunJCE"); |
| encrypter.init(Cipher.ENCRYPT_MODE, key, iv); |
| PipedOutputStream producer = new PipedOutputStream(); |
| OutputStream out = new CipherOutputStream(producer, encrypter); |
| |
| producer.connect(consumer); // connect pipe |
| |
| byte[] plaintext = "abcdef".getBytes(); |
| for (int i = 0; i < plaintext.length; i++) { |
| out.write(plaintext[i]); |
| out.flush(); |
| int b = in.read(); |
| String original = new String(plaintext, i, 1); |
| String result = new String(new byte[] { (byte)b }); |
| System.out.println(" " + original + " -> " + result); |
| } |
| } |
| } |