1/*
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 8014374
27 * @summary Ensure key wrap/unwrap works using AES/GCM/NoPadding
28 * @key randomness
29 */
30
31import java.io.*;
32import java.security.*;
33import java.security.spec.*;
34import java.util.*;
35import javax.crypto.*;
36import javax.crypto.spec.*;
37
38public class TestGCMKeyWrap extends UcryptoTest {
39
40    public static void main(String[] args) throws Exception {
41        main(new TestGCMKeyWrap(), null);
42    }
43
44    public void doTest(Provider p) throws Exception {
45        // check if GCM support exists
46        try {
47            Cipher.getInstance("AES/GCM/NoPadding", p);
48        } catch (NoSuchAlgorithmException nsae) {
49            System.out.println("Skipping Test due to no GCM support");
50            return;
51        }
52
53        Random rdm = new Random();
54
55        //init Secret Key
56        byte[] keyValue = new byte[16];
57        rdm.nextBytes(keyValue);
58        SecretKey key = new SecretKeySpec(keyValue, "AES");
59
60        Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding", p);
61        cipher.init(Cipher.WRAP_MODE, key);
62
63        byte[] wrappedKey = cipher.wrap(key);
64
65        try { // make sure ISE is thrown if re-using the same key/IV
66            wrappedKey = cipher.wrap(key);
67            throw new Exception("FAIL: expected ISE not thrown");
68        } catch(IllegalStateException ise){
69            System.out.println("Expected ISE thrown for re-wrapping");
70        }
71
72        //unwrap the key
73        AlgorithmParameters params = cipher.getParameters();
74        cipher.init(Cipher.UNWRAP_MODE, key, params);
75        Key unwrappedKey = cipher.unwrap(wrappedKey, "AES", Cipher.SECRET_KEY);
76
77        //check if we can unwrap second time
78        unwrappedKey = cipher.unwrap(wrappedKey, "AES", Cipher.SECRET_KEY);
79
80        // Comparison
81        if (!Arrays.equals(key.getEncoded(), unwrappedKey.getEncoded())) {
82            throw new Exception("FAIL: keys are not equal");
83        } else {
84            System.out.println("Passed key equality check");
85        }
86    }
87}
88