1/* 2 * Copyright (c) 2003, 2012, 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 4853305 4865198 4888410 4963723 27 * @summary Verify that the RSA KeyPairGenerator works 28 * @author Andreas Sterbenz 29 * @key randomness 30 */ 31 32import java.io.*; 33import java.util.*; 34import java.math.BigInteger; 35 36import java.security.*; 37import java.security.interfaces.*; 38import java.security.spec.*; 39 40public class TestKeyPairGenerator { 41 42 private static Provider provider; 43 44 private static byte[] data; 45 46 private static void testSignature(String algorithm, PrivateKey privateKey, PublicKey publicKey) throws Exception { 47 System.out.println("Testing " + algorithm + "..."); 48 Signature s = Signature.getInstance(algorithm, provider); 49 s.initSign(privateKey); 50 s.update(data); 51 byte[] sig = s.sign(); 52 s.initVerify(publicKey); 53 s.update(data); 54 boolean result = s.verify(sig); 55 if (result == false) { 56 throw new Exception("Verification failed"); 57 } 58 } 59 60 private static void test(PrivateKey privateKey, PublicKey publicKey) throws Exception { 61 testSignature("MD2withRSA", privateKey, publicKey); 62 testSignature("MD5withRSA", privateKey, publicKey); 63 testSignature("SHA1withRSA", privateKey, publicKey); 64 testSignature("SHA224withRSA", privateKey, publicKey); 65 testSignature("SHA256withRSA", privateKey, publicKey); 66 RSAPublicKey rsaKey = (RSAPublicKey)publicKey; 67 if (rsaKey.getModulus().bitLength() > 512) { 68 // for SHA384 and SHA512 the data is too long for 512 bit keys 69 testSignature("SHA384withRSA", privateKey, publicKey); 70 testSignature("SHA512withRSA", privateKey, publicKey); 71 } 72 } 73 74 // regression test for 4865198 75 private static void testInvalidSignature(KeyPair kp1, KeyPair kp2) throws Exception { 76 System.out.println("Testing signature with incorrect key..."); 77 Signature sig = Signature.getInstance("MD5withRSA", provider); 78 sig.initSign(kp1.getPrivate()); 79 byte[] data = new byte[100]; 80 sig.update(data); 81 byte[] signature = sig.sign(); 82 sig.initVerify(kp1.getPublic()); 83 sig.update(data); 84 if (sig.verify(signature) == false) { 85 throw new Exception("verification failed"); 86 } 87 sig.initVerify(kp2.getPublic()); 88 sig.update(data); 89 // verify needs to return false and not throw an Exception 90 try { 91 if (sig.verify(signature)) { 92 throw new Exception("verification unexpectedly succeeded"); 93 } 94 } catch (SignatureException se) { 95 // Yet another kind of failure, OK. 96 } 97 } 98 99 public static void main(String[] args) throws Exception { 100 long start = System.currentTimeMillis(); 101 provider = Security.getProvider("SunRsaSign"); 102 data = new byte[2048]; 103 // keypair generation is very slow, test only a few short keys 104 int[] keyLengths = {512, 512, 1024}; 105 BigInteger[] pubExps = {null, BigInteger.valueOf(3), null}; 106 KeyPair[] keyPairs = new KeyPair[3]; 107 new Random().nextBytes(data); 108 KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA", provider); 109 for (int i = 0; i < keyLengths.length; i++) { 110 int len = keyLengths[i]; 111 BigInteger exp = pubExps[i]; 112 System.out.println("Generating " + len + " bit keypair..."); 113 if (exp == null) { 114 kpg.initialize(len); 115 } else { 116 kpg.initialize(new RSAKeyGenParameterSpec(len, exp)); 117 } 118 KeyPair kp = kpg.generateKeyPair(); 119 keyPairs[i] = kp; 120 RSAPublicKey publicKey = (RSAPublicKey)kp.getPublic(); 121 System.out.println(publicKey); 122 RSAPrivateCrtKey privateKey = (RSAPrivateCrtKey)kp.getPrivate(); 123 if (publicKey.getModulus().equals(privateKey.getModulus()) == false) { 124 throw new Exception("Moduli do not match"); 125 } 126 if (publicKey.getPublicExponent().equals(privateKey.getPublicExponent()) == false) { 127 throw new Exception("Exponents do not match"); 128 } 129 int keyLen = publicKey.getModulus().bitLength(); 130 if ((keyLen > len) || (keyLen < len - 1)) { 131 throw new Exception("Incorrect key length: " + keyLen); 132 } 133 if (exp != null) { 134 if (exp.equals(publicKey.getPublicExponent()) == false) { 135 throw new Exception("Incorrect exponent"); 136 } 137 } 138 test(privateKey, publicKey); 139 } 140 testInvalidSignature(keyPairs[0], keyPairs[1]); 141 testInvalidSignature(keyPairs[0], keyPairs[2]); 142 testInvalidSignature(keyPairs[2], keyPairs[0]); 143 long stop = System.currentTimeMillis(); 144 System.out.println("All tests passed (" + (stop - start) + " ms)."); 145 } 146} 147