1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/*
* Copyright (c) 2002, 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.
*/
/*
* @test
* @bug 4513830
* @summary Verify the output size returned by AES cipher.getOutputSize
* method in DECRYPT mode does not add extra bytes for padding
* @author Valerie Peng
* @key randomness
*/
import java.io.PrintStream;
import java.security.*;
import java.security.spec.*;
import java.util.Random;
import javax.crypto.*;
import javax.crypto.spec.*;
import java.security.Provider;
public class Test4513830 {
private static final String ALGO = "AES";
private static final String MODE = "ECB";
private static final String PADDING = "PKCS5Padding";
private static final int KEYSIZE = 16; // in bytes
private static final int TEXTLENGTHS[] = {
16, 17, 18, 19, 20, 21, 22, 23 };
public boolean execute() throws Exception {
Random rdm = new Random();
byte[] plainText=new byte[125];
rdm.nextBytes(plainText);
Cipher ci = Cipher.getInstance(ALGO+"/"+MODE+"/"+PADDING, "SunJCE");
// TEST FIX 4513830
KeyGenerator kg = KeyGenerator.getInstance(ALGO, "SunJCE");
kg.init(KEYSIZE*8);
SecretKey key = kg.generateKey();
ci.init(Cipher.DECRYPT_MODE, key);
int recoveredTextLength = ci.getOutputSize(16);
if (recoveredTextLength != 16) {
throw new Exception("output size should not increase when decrypting!");
}
// BONUS TESTS
// 1. call getOutputSize with various lengths and see if
// the returned size is correct.
for (int i=0; i<TEXTLENGTHS.length; i++) {
ci.init(Cipher.ENCRYPT_MODE, key);
int cipherTextLength = ci.getOutputSize(TEXTLENGTHS[i]);
if (cipherTextLength != 32) {
throw new Exception("output size " + cipherTextLength
+ " for input size " + TEXTLENGTHS[i]
+ " when encrypting is wrong!");
}
}
// passed all tests...hooray!
return true;
}
public static void main (String[] args) throws Exception {
Test4513830 test = new Test4513830();
String testName = test.getClass().getName() + "[" + ALGO +
"/" + MODE + "/" + PADDING + "]";
if (test.execute()) {
System.out.println(testName + ": Passed!");
}
}
}
|
