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
24import java.security.InvalidAlgorithmParameterException;
25import java.security.InvalidKeyException;
26import java.security.NoSuchAlgorithmException;
27import java.security.NoSuchProviderException;
28import java.security.spec.AlgorithmParameterSpec;
29import java.util.Arrays;
30import java.util.Random;
31import javax.crypto.BadPaddingException;
32import javax.crypto.Cipher;
33import javax.crypto.IllegalBlockSizeException;
34import javax.crypto.KeyGenerator;
35import javax.crypto.NoSuchPaddingException;
36import javax.crypto.SecretKey;
37import javax.crypto.ShortBufferException;
38import javax.crypto.spec.IvParameterSpec;
39
40
41/**
42 * @test
43 * @bug 8043836
44 * @summary Test AES ciphers with 4 different modes with NoPadding. Check if
45 *          data before encryption and after decryption is the same.
46 * @key randomness
47 */
48
49public class CTR {
50
51    private static final String ALGORITHM = "AES";
52
53    private static final String PROVIDER = "SunJCE";
54
55    private static final String[] MODES = {"CTR","CFB24","OFB32","GCM"};
56
57    private static final String PADDING = "NoPadding";
58
59
60    private static final int KEY_LENGTH = 128;
61
62    public static void main(String argv[]) throws Exception {
63        CTR test = new CTR();
64        for (String mode : MODES) {
65            test.runTest(ALGORITHM, mode, PADDING);
66        }
67    }
68
69
70    public void runTest(String algo, String mo, String pad) throws Exception {
71        Cipher ci = null;
72        byte[] iv = null;
73        AlgorithmParameterSpec aps = null;
74        SecretKey key = null;
75
76        try {
77            Random rdm = new Random();
78            byte[] plainText;
79
80            ci = Cipher.getInstance(algo + "/" + mo + "/" + pad, PROVIDER);
81            KeyGenerator kg = KeyGenerator.getInstance(algo, PROVIDER);
82            kg.init(KEY_LENGTH);
83            key = kg.generateKey();
84
85            for (int i = 0; i < 15; i++) {
86                plainText = new byte[1600 + i + 1];
87                rdm.nextBytes(plainText);
88
89                if (!mo.equalsIgnoreCase("GCM")) {
90                    ci.init(Cipher.ENCRYPT_MODE, key, aps);
91                } else {
92                    ci.init(Cipher.ENCRYPT_MODE, key);
93                }
94
95                byte[] cipherText = new byte[ci.getOutputSize(plainText.length)];
96                int offset = ci.update(plainText, 0, plainText.length,
97                        cipherText, 0);
98
99                ci.doFinal(cipherText, offset);
100
101                if (!mo.equalsIgnoreCase("ECB")) {
102                    iv = ci.getIV();
103                    aps = new IvParameterSpec(iv);
104                } else {
105                    aps = null;
106                }
107
108                if (!mo.equalsIgnoreCase("GCM")) {
109                    ci.init(Cipher.DECRYPT_MODE, key, aps);
110                } else {
111                    ci.init(Cipher.DECRYPT_MODE, key, ci.getParameters());
112                }
113
114                byte[] recoveredText = new byte[ci.getOutputSize(cipherText.length)];
115                int len = ci.doFinal(cipherText, 0, cipherText.length,
116                        recoveredText);
117                byte[] tmp = new byte[len];
118
119                for (int j = 0; j < len; j++) {
120                    tmp[j] = recoveredText[j];
121                }
122                Arrays.toString(plainText);
123                if (!java.util.Arrays.equals(plainText, tmp)) {
124                    System.out.println("Original: ");
125                    dumpBytes(plainText);
126                    System.out.println("Recovered: ");
127                    dumpBytes(tmp);
128                    throw new RuntimeException("Original text is not equal with recovered text, with mode:" + mo);
129                }
130            }
131        } catch (NoSuchAlgorithmException | NoSuchProviderException | NoSuchPaddingException
132                | InvalidKeyException | InvalidAlgorithmParameterException
133                | ShortBufferException | IllegalBlockSizeException
134                | BadPaddingException e) {
135            System.out.println("Test failed!");
136            throw e;
137        }
138    }
139
140    private void dumpBytes(byte[] bytes){
141        for (byte b : bytes){
142            System.out.print(Integer.toHexString(b));
143        }
144        System.out.println();
145    }
146}
147