94 lines
3.1 KiB
Java
94 lines
3.1 KiB
Java
/*
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* Copyright (c) 1999, 2007, 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 KeyWrapping
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* @author Jan Luehe
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*/
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import javax.crypto.*;
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import java.security.*;
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public class KeyWrapping {
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public static void main(String[] args) throws Exception {
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Cipher c1 = Cipher.getInstance("DES", "SunJCE");
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Cipher c2 = Cipher.getInstance("DES");
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KeyGenerator keyGen = KeyGenerator.getInstance("DES");
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keyGen.init(56);
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// Generate two DES keys: sKey and sessionKey
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SecretKey sKey = keyGen.generateKey();
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SecretKey sessionKey = keyGen.generateKey();
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// wrap and unwrap the session key
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// make sure the unwrapped session key
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// can decrypt a message encrypted
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// with the session key
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c1.init(Cipher.WRAP_MODE, sKey);
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byte[] wrappedKey = c1.wrap(sessionKey);
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c1.init(Cipher.UNWRAP_MODE, sKey);
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SecretKey unwrappedSessionKey =
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(SecretKey)c1.unwrap(wrappedKey, "DES",
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Cipher.SECRET_KEY);
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c2.init(Cipher.ENCRYPT_MODE, unwrappedSessionKey);
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String msg = "Hello";
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byte[] cipherText = c2.doFinal(msg.getBytes());
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c2.init(Cipher.DECRYPT_MODE, unwrappedSessionKey);
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byte[] clearText = c2.doFinal(cipherText);
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if (!msg.equals(new String(clearText)))
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throw new Exception("The unwrapped session key is corrupted.");
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KeyPairGenerator kpairGen = KeyPairGenerator.getInstance("DSA");
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kpairGen.initialize(1024);
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KeyPair kpair = kpairGen.genKeyPair();
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PublicKey pub = kpair.getPublic();
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PrivateKey pri = kpair.getPrivate();
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c1.init(Cipher.WRAP_MODE, sKey);
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byte[] wrappedPub = c1.wrap(pub);
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byte[] wrappedPri = c1.wrap(pri);
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c1.init(Cipher.UNWRAP_MODE, sKey);
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Key unwrappedPub = c1.unwrap(wrappedPub, "DSA",
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Cipher.PUBLIC_KEY);
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Key unwrappedPri = c1.unwrap(wrappedPri, "DSA",
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Cipher.PRIVATE_KEY);
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}
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}
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