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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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23
24 /**
25 * @test
26 * @bug 4856966
27 * @summary Verify that the RSA KeyPairGenerator works
28 * @author Andreas Sterbenz
29 * @library ..
30 * @run main/othervm TestKeyPairGenerator
31 */
32
33 import java.io.*;
34 import java.util.*;
35 import java.math.BigInteger;
36
37 import java.security.*;
38 import java.security.interfaces.*;
39 import java.security.spec.*;
40
41 public class TestKeyPairGenerator extends PKCS11Test {
42
43 private static Provider provider;
44
45 private static byte[] data;
46
47 private static void testSignature(String algorithm, PrivateKey privateKey, PublicKey publicKey) throws Exception {
48 System.out.println("Testing " + algorithm + "...");
49 Signature s = Signature.getInstance(algorithm, provider);
50 s.initSign(privateKey);
51 s.update(data);
52 byte[] sig = s.sign();
53 s.initVerify(publicKey);
54 s.update(data);
55 boolean result = s.verify(sig);
56 if (result == false) {
57 throw new Exception("Verification failed");
58 }
59 }
60
61 private static void test(PrivateKey privateKey, PublicKey publicKey) throws Exception {
62 testSignature("MD2withRSA", privateKey, publicKey);
63 testSignature("MD5withRSA", privateKey, publicKey);
64 testSignature("SHA1withRSA", privateKey, publicKey);
65 testSignature("SHA224withRSA", privateKey, publicKey);
66 testSignature("SHA256withRSA", privateKey, publicKey);
67 RSAPublicKey rsaKey = (RSAPublicKey)publicKey;
68 if (rsaKey.getModulus().bitLength() > 512) {
69 // for SHA384 and SHA512 the data is too long for 512 bit keys
70 testSignature("SHA384withRSA", privateKey, publicKey);
71 testSignature("SHA512withRSA", privateKey, publicKey);
72 }
73 }
74
75 // regression test for 4865198
76 private static void testInvalidSignature(KeyPair kp1, KeyPair kp2) throws Exception {
77 System.out.println("Testing signature with incorrect key...");
78 Signature sig = Signature.getInstance("MD5withRSA", provider);
79 sig.initSign(kp1.getPrivate());
80 byte[] data = new byte[100];
81 sig.update(data);
82 byte[] signature = sig.sign();
83 sig.initVerify(kp1.getPublic());
84 sig.update(data);
85 if (sig.verify(signature) == false) {
86 throw new Exception("verification failed");
87 }
88 sig.initVerify(kp2.getPublic());
89 sig.update(data);
90 // verify needs to return false and not throw an Exception
91 if (sig.verify(signature)) {
92 throw new Exception("verification unexpectedly succeeded");
93 }
94 }
95
96 public static void main(String[] args) throws Exception {
97 main(new TestKeyPairGenerator());
98 }
99
100 public void main(Provider p) throws Exception {
101 long start = System.currentTimeMillis();
102 provider = p;
103 data = new byte[2048];
104 // keypair generation is very slow, test only a few short keys
105 int[] keyLengths = {512, 512, 1024};
106 BigInteger[] pubExps = {null, BigInteger.valueOf(3), null};
107 KeyPair[] keyPairs = new KeyPair[3];
108 new Random().nextBytes(data);
109 KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", provider);
110 for (int i = 0; i < keyLengths.length; i++) {
111 int len = keyLengths[i];
112 BigInteger exp = pubExps[i];
113 System.out.println("Generating " + len + " bit keypair...");
114 if (exp == null) {
115 kpg.initialize(len);
116 } else {
117 kpg.initialize(new RSAKeyGenParameterSpec(len, exp));
118 }
119 KeyPair kp = kpg.generateKeyPair();
120 keyPairs[i] = kp;
121 RSAPublicKey publicKey = (RSAPublicKey)kp.getPublic();
122 System.out.println(publicKey);
123 RSAPrivateCrtKey privateKey = (RSAPrivateCrtKey)kp.getPrivate();
124 if (publicKey.getModulus().equals(privateKey.getModulus()) == false) {
125 throw new Exception("Moduli do not match");
126 }
127 if (publicKey.getPublicExponent().equals(privateKey.getPublicExponent()) == false) {
128 throw new Exception("Exponents do not match");
129 }
130 int keyLen = publicKey.getModulus().bitLength();
131 if ((keyLen > len) || (keyLen < len - 1)) {
132 throw new Exception("Incorrect key length: " + keyLen);
133 }
134 if (exp != null) {
135 if (exp.equals(publicKey.getPublicExponent()) == false) {
136 throw new Exception("Incorrect exponent");
137 }
138 }
139 test(privateKey, publicKey);
140 }
141 testInvalidSignature(keyPairs[0], keyPairs[1]);
142 testInvalidSignature(keyPairs[0], keyPairs[2]);
143 long stop = System.currentTimeMillis();
144 System.out.println("All tests passed (" + (stop - start) + " ms).");
145 }
146 }