/*
* Copyright ( c ) 2003 , 2007 , 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 4844847
* @ summary Test the Cipher . update / doFinal ( ByteBuffer , ByteBuffer ) methods
* @ author Andreas Sterbenz
* @ key randomness
*/
import java.util.*;
import java.nio.*;
import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;
public class ByteBuffers {
public static void main(String[] args) throws Exception {
Provider p = Security.getProvider("SunJCE" );
Random random = new Random();
int n = 10 * 1024 ;
byte [] t = new byte [n];
random.nextBytes(t);
byte [] keyBytes = new byte [8 ];
random.nextBytes(keyBytes);
SecretKey key = new SecretKeySpec(keyBytes, "DES" );
Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding" );
cipher.init(Cipher.ENCRYPT_MODE, key);
byte [] outBytes = cipher.doFinal(t);
// create ByteBuffers for input (i1, i2, i3) and fill them
ByteBuffer i0 = ByteBuffer.allocate(n + 256 );
i0.position(random.nextInt(256 ));
i0.limit(i0.position() + n);
ByteBuffer i1 = i0.slice();
i1.put(t);
ByteBuffer i2 = ByteBuffer.allocateDirect(t.length);
i2.put(t);
i1.clear();
ByteBuffer i3 = i1.asReadOnlyBuffer();
ByteBuffer o0 = ByteBuffer.allocate(n + 512 );
o0.position(random.nextInt(256 ));
o0.limit(o0.position() + n + 256 );
ByteBuffer o1 = o0.slice();
ByteBuffer o2 = ByteBuffer.allocateDirect(t.length + 256 );
crypt(cipher, i1, o1, outBytes, random);
crypt(cipher, i2, o1, outBytes, random);
crypt(cipher, i3, o1, outBytes, random);
crypt(cipher, i1, o2, outBytes, random);
crypt(cipher, i2, o2, outBytes, random);
crypt(cipher, i3, o2, outBytes, random);
System.out.println("All tests passed" );
}
private static void crypt(Cipher cipher, ByteBuffer in, ByteBuffer out, byte [] outBytes, Random random) throws Exception {
in.clear();
out.clear();
out.put(new byte [out.remaining()]);
out.clear();
int lim = in.limit();
in.limit(random.nextInt(lim));
cipher.update(in, out);
if (in.hasRemaining()) {
throw new Exception("Buffer not consumed" );
}
in.limit(lim);
cipher.doFinal(in, out);
if (in.hasRemaining()) {
throw new Exception("Buffer not consumed" );
}
out.flip();
byte [] b = new byte [out.remaining()];
out.get(b);
if (Arrays.equals(outBytes, b) == false ) {
throw new Exception("Encryption output mismatch" );
}
}
}
Messung V0.5 in Prozent C=89 H=93 G=90
¤ Dauer der Verarbeitung: 0.3 Sekunden
¤
*© Formatika GbR, Deutschland