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