75 lines
2.7 KiB
Java
75 lines
2.7 KiB
Java
/*
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* Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 0000000
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* @summary FlushBug
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* @author Jan Luehe
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* @key randomness
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*/
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import java.io.*;
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import java.security.*;
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import javax.crypto.*;
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import javax.crypto.spec.*;
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public class FlushBug {
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public static void main(String[] args) throws Exception {
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SecureRandom sr = new SecureRandom();
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// Create new DES key.
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KeyGenerator kg = KeyGenerator.getInstance("DES", "SunJCE");
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kg.init(sr);
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Key key = kg.generateKey();
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// Generate an IV.
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byte[] iv_bytes = new byte[8];
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sr.nextBytes(iv_bytes);
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IvParameterSpec iv = new IvParameterSpec(iv_bytes);
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// Create the consumer
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Cipher decrypter = Cipher.getInstance("DES/CFB8/NoPadding", "SunJCE");
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decrypter.init(Cipher.DECRYPT_MODE, key, iv);
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PipedInputStream consumer = new PipedInputStream();
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InputStream in = new CipherInputStream(consumer, decrypter);
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// Create the producer
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Cipher encrypter = Cipher.getInstance("DES/CFB8/NoPadding", "SunJCE");
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encrypter.init(Cipher.ENCRYPT_MODE, key, iv);
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PipedOutputStream producer = new PipedOutputStream();
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OutputStream out = new CipherOutputStream(producer, encrypter);
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producer.connect(consumer); // connect pipe
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byte[] plaintext = "abcdef".getBytes();
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for (int i = 0; i < plaintext.length; i++) {
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out.write(plaintext[i]);
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out.flush();
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int b = in.read();
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String original = new String(plaintext, i, 1);
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String result = new String(new byte[] { (byte)b });
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System.out.println(" " + original + " -> " + result);
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}
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}
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}
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