1 /* 2 * Copyright (c) 1998, 2007, 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 0000000 27 * @summary FlushBug 28 * @author Jan Luehe 29 */ 30 import java.io.*; 31 import java.security.*; 32 import javax.crypto.*; 33 import javax.crypto.spec.*; 34 import com.sun.crypto.provider.SunJCE; 35 36 public class FlushBug { 37 public static void main(String[] args) throws Exception { 38 39 Provider prov = new com.sun.crypto.provider.SunJCE(); 40 Security.addProvider(prov); 41 42 SecureRandom sr = new SecureRandom(); 43 44 // Create new DES key. 45 KeyGenerator kg = KeyGenerator.getInstance("DES"); 46 kg.init(sr); 47 Key key = kg.generateKey(); 48 49 // Generate an IV. 50 byte[] iv_bytes = new byte[8]; 51 sr.nextBytes(iv_bytes); 52 IvParameterSpec iv = new IvParameterSpec(iv_bytes); 53 54 // Create the consumer 55 Cipher decrypter = Cipher.getInstance("DES/CFB8/NoPadding"); 56 decrypter.init(Cipher.DECRYPT_MODE, key, iv); 57 PipedInputStream consumer = new PipedInputStream(); 58 InputStream in = new CipherInputStream(consumer, decrypter); 59 60 // Create the producer 61 Cipher encrypter = Cipher.getInstance("DES/CFB8/NoPadding"); 62 encrypter.init(Cipher.ENCRYPT_MODE, key, iv); 63 PipedOutputStream producer = new PipedOutputStream(); 64 OutputStream out = new CipherOutputStream(producer, encrypter); 65 66 producer.connect(consumer); // connect pipe 67 68 byte[] plaintext = "abcdef".getBytes(); 69 for (int i = 0; i < plaintext.length; i++) { 70 out.write(plaintext[i]); 71 out.flush(); 72 int b = in.read(); 73 String original = new String(plaintext, i, 1); 74 String result = new String(new byte[] { (byte)b }); 75 System.out.println(" " + original + " -> " + result); 76 } 77 } 78 }