/*
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*
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* 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
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
* @test
* @bug 0000000
* @summary FlushBug
* @author Jan Luehe
*/
import java.io.*;
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import com.sun.crypto.provider.SunJCE;
public class FlushBug {
public static void main(String[] args) throws Exception {
Provider prov = new com.sun.crypto.provider.SunJCE();
Security.addProvider(prov);
SecureRandom sr = new SecureRandom();
// Create new DES key.
KeyGenerator kg = KeyGenerator.getInstance("DES");
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");
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");
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);
}
}
}