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/*
* Copyright (c) 1999, 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 0000000
* @summary KeyWrapping
* @author Jan Luehe
*/
import javax.crypto.*;
import java.security.*;
public class KeyWrapping {
public static void main(String[] args) throws Exception {
Cipher c1 = Cipher.getInstance("DES", "SunJCE");
Cipher c2 = Cipher.getInstance("DES");
KeyGenerator keyGen = KeyGenerator.getInstance("DES");
keyGen.init(56);
// Generate two DES keys: sKey and sessionKey
SecretKey sKey = keyGen.generateKey();
SecretKey sessionKey = keyGen.generateKey();
// wrap and unwrap the session key
// make sure the unwrapped session key
// can decrypt a message encrypted
// with the session key
c1.init(Cipher.WRAP_MODE, sKey);
byte[] wrappedKey = c1.wrap(sessionKey);
c1.init(Cipher.UNWRAP_MODE, sKey);
SecretKey unwrappedSessionKey =
(SecretKey)c1.unwrap(wrappedKey, "DES",
Cipher.SECRET_KEY);
c2.init(Cipher.ENCRYPT_MODE, unwrappedSessionKey);
String msg = "Hello";
byte[] cipherText = c2.doFinal(msg.getBytes());
c2.init(Cipher.DECRYPT_MODE, unwrappedSessionKey);
byte[] clearText = c2.doFinal(cipherText);
if (!msg.equals(new String(clearText)))
throw new Exception("The unwrapped session key is corrupted.");
KeyPairGenerator kpairGen = KeyPairGenerator.getInstance("DSA");
kpairGen.initialize(1024);
KeyPair kpair = kpairGen.genKeyPair();
PublicKey pub = kpair.getPublic();
PrivateKey pri = kpair.getPrivate();
c1.init(Cipher.WRAP_MODE, sKey);
byte[] wrappedPub = c1.wrap(pub);
byte[] wrappedPri = c1.wrap(pri);
c1.init(Cipher.UNWRAP_MODE, sKey);
Key unwrappedPub = c1.unwrap(wrappedPub, "DSA",
Cipher.PUBLIC_KEY);
Key unwrappedPri = c1.unwrap(wrappedPri, "DSA",
Cipher.PRIVATE_KEY);
}
}
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