1 /*

     2  * Copyright 2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /**

    25  * @test

    26  * @bug 4856966

    27  * @summary Verify that the RSA KeyPairGenerator works

    28  * @author Andreas Sterbenz

    29  * @library ..

    30  */

    31 

    32 import java.io.*;

    33 import java.util.*;

    34 import java.math.BigInteger;

    35 

    36 import java.security.*;

    37 import java.security.interfaces.*;

    38 import java.security.spec.*;

    39 

    40 public class TestKeyPairGenerator extends PKCS11Test {

    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("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         if (sig.verify(signature)) {

    90             throw new Exception("verification unexpectedly succeeded");

    91         }

    92     }

    93 

    94     public static void main(String[] args) throws Exception {

    95         main(new TestKeyPairGenerator());

    96     }

    97 

    98     public void main(Provider p) throws Exception {

    99         long start = System.currentTimeMillis();

   100         provider = p;

   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         long stop = System.currentTimeMillis();

   142         System.out.println("All tests passed (" + (stop - start) + " ms).");

   143     }

   144 }