1 /*
2 * Copyright (c) 2003, 2015, 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 * @library /lib/testlibrary/
27 * @build jdk.testlibrary.*
28 * @run main ModPow65537
29 * @bug 4891312 8074460 8078672
30 * @summary verify that modPow() not broken by the special case for 65537 (use -Dseed=X to set PRNG seed)
31 * @author Andreas Sterbenz
32 * @key randomness
33 */
34
35 import java.math.BigInteger;
36
37 import java.security.*;
38 import java.security.spec.*;
39 import java.util.Random;
40
41 public class ModPow65537 {
42
43 public static void main(String[] args) throws Exception {
44 // SunRsaSign uses BigInteger internally
45 KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", "SunRsaSign");
46 kpg.initialize(new RSAKeyGenParameterSpec(512, BigInteger.valueOf(65537)));
47 KeyPair kp = kpg.generateKeyPair();
48 testSigning(kp);
49
50 kpg.initialize(new RSAKeyGenParameterSpec(512, BigInteger.valueOf(65539)));
51 kp = kpg.generateKeyPair();
52 testSigning(kp);
53
54 kpg.initialize(new RSAKeyGenParameterSpec(512, BigInteger.valueOf(3)));
55 kp = kpg.generateKeyPair();
56 testSigning(kp);
57
58 // basic known answer test
59 BigInteger base = new BigInteger("19058071224156864789844466979330892664777520457048234786139035643344145635582");
60 BigInteger mod = new BigInteger("75554098474976067521257305210610421240510163914613117319380559667371251381587");
61 BigInteger exp1 = BigInteger.valueOf(65537);
62 BigInteger exp2 = BigInteger.valueOf(75537);
63 BigInteger exp3 = new BigInteger("13456870775607312149");
64
65 BigInteger res1 = new BigInteger("5770048609366563851320890693196148833634112303472168971638730461010114147506");
66 BigInteger res2 = new BigInteger("63446979364051087123350579021875958137036620431381329472348116892915461751531");
67 BigInteger res3 = new BigInteger("39016891919893878823999350081191675846357272199067075794096200770872982089502");
68
69 if (base.modPow(exp1, mod).equals(res1) == false) {
70 throw new Exception("Error using " + exp1);
71 }
72 if (base.modPow(exp2, mod).equals(res2) == false) {
73 throw new Exception("Error using " + exp2);
74 }
75 if (base.modPow(exp3, mod).equals(res3) == false) {
76 throw new Exception("Error using " + exp3);
77 }
78
79 System.out.println("Passed");
80 }
81
82 private static void testSigning(KeyPair kp) throws Exception {
83 System.out.println(kp.getPublic());
84 byte[] data = new byte[1024];
85 Random random = RandomFactory.getRandom();
86 random.nextBytes(data);
87
88 Signature sig = Signature.getInstance("SHA1withRSA", "SunRsaSign");
89 sig.initSign(kp.getPrivate());
90 sig.update(data);
91 byte[] sigBytes = sig.sign();
92
93 sig.initVerify(kp.getPublic());
94 sig.update(data);
95 if (sig.verify(sigBytes) == false) {
96 throw new Exception("signature verification failed");
97 }
98 System.out.println("OK");
99 }
100
101 }