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/*
* Copyright (c) 2007, 2015, 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.
*/
import java.security.AlgorithmParameters;
import java.security.Key;
import java.util.Arrays;
import javax.crypto.SecretKey;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
/*
* @test
* @bug 8048596
* @summary Check if a key wrapper works properly with GCM mode
*/
public class KeyWrapper {
static final String AES = "AES";
static final String TRANSFORMATION = "AES/GCM/NoPadding";
static final String PROVIDER = "SunJCE";
static final int KEY_LENGTH = 128;
public static void main(String argv[]) throws Exception {
doTest(PROVIDER, TRANSFORMATION);
}
private static void doTest(String provider, String algo) throws Exception {
SecretKey key;
SecretKey keyToWrap;
// init a secret Key
KeyGenerator kg = KeyGenerator.getInstance(AES, PROVIDER);
kg.init(KEY_LENGTH);
key = kg.generateKey();
keyToWrap = kg.generateKey();
// initialization
Cipher cipher = Cipher.getInstance(algo, provider);
cipher.init(Cipher.WRAP_MODE, key);
AlgorithmParameters params = cipher.getParameters();
// wrap the key
byte[] keyWrapper = cipher.wrap(keyToWrap);
try {
// check if we can't wrap it again with the same key/IV
keyWrapper = cipher.wrap(keyToWrap);
throw new RuntimeException(
"FAILED: expected IllegalStateException hasn't "
+ "been thrown ");
} catch (IllegalStateException ise) {
System.out.println(ise.getMessage());
System.out.println("Expected exception");
}
// unwrap the key
cipher.init(Cipher.UNWRAP_MODE, key, params);
cipher.unwrap(keyWrapper, algo, Cipher.SECRET_KEY);
// check if we can unwrap second time
Key unwrapKey = cipher.unwrap(keyWrapper, algo, Cipher.SECRET_KEY);
if (!Arrays.equals(keyToWrap.getEncoded(), unwrapKey.getEncoded())) {
throw new RuntimeException(
"FAILED: original and unwrapped keys are not equal");
}
}
}
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