Java example source code file (GetKeySpecException.java)

This example Java source code file (GetKeySpecException.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bad_params, cipher, crypto, encryptedprivatekeyinfo, good_params, ike, invalidkeyexception, key, nosuchalgorithmexception, npe, nullpointerexception, pbeparameterspec, provider, security, should, sunjce, util

The GetKeySpecException.java Java example source code

/*
 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/**
 * @test
 * @bug 4508341 7055362
 * @library ../../../java/security/testlibrary
 * @summary Test the error conditions of
 * EncryptedPrivateKeyInfo.getKeySpec(...) methods.
 * @author Valerie Peng
 */
import java.security.*;
import java.util.Arrays;
import java.util.Vector;
import java.security.spec.*;
import javax.crypto.*;
import javax.crypto.spec.*;

public class GetKeySpecException {
    private static final String cipherAlg = "PBEWithMD5AndDES";
    private static final char[] passwd = { 'p','a','s','s','w','d' };
    private static SecretKey cipherKey;
    private static Cipher cipher = null;
    private static byte[] encryptedData = null;
    private static Provider sunjce = null;
    private static final SecretKey INVALID_KEY =
        new SecretKeySpec(new byte[8], "DES");
    private static AlgorithmParameters BAD_PARAMS;
    private static AlgorithmParameters GOOD_PARAMS;

    static {
        try {
            sunjce = Security.getProvider("SunJCE");
            PBEParameterSpec badParamSpec =
                new PBEParameterSpec(new byte[10], 10);
            BAD_PARAMS = AlgorithmParameters.getInstance(cipherAlg, sunjce);
            BAD_PARAMS.init(badParamSpec);
            PBEParameterSpec goodParamSpec =
                new PBEParameterSpec(new byte[8], 1024);
            GOOD_PARAMS = AlgorithmParameters.getInstance(cipherAlg, sunjce);
            GOOD_PARAMS.init(goodParamSpec);
            PBEKeySpec keySpec = new PBEKeySpec(passwd);
            SecretKeyFactory skf =
                SecretKeyFactory.getInstance(cipherAlg, "SunJCE");
            cipherKey = skf.generateSecret(keySpec);
        } catch (Exception ex) {
            // should never happen
            BAD_PARAMS = null;
            GOOD_PARAMS = null;
        }
    }

    private static void throwException(String msg) throws Exception {
        throw new Exception(msg);
    }

    private static Provider[] removeProviders(String cipherAlg) {
        Vector providers = new Vector();
        boolean done = false;
        while (!done) {
            try {
                Cipher c = Cipher.getInstance(cipherAlg);
                Provider p = c.getProvider();
                providers.add(p);
                Security.removeProvider(p.getName());
            } catch (NoSuchAlgorithmException nsae) {
                done = true;
            } catch (NoSuchPaddingException nspe) {
                // should never happen
            }
        }
        return (Provider[]) (providers.toArray(new Provider[0]));
    }

    private static void addProviders(Provider[] provs) {
        for (int i=0; i<provs.length; i++) {
            Security.addProvider(provs[i]);
        }
    }

    public static void main(String[] args) throws Exception {
        ProvidersSnapshot snapshot = ProvidersSnapshot.create();
        try {
            main0(args);
        } finally {
            snapshot.restore();
        }
    }

    public static void main0(String[] args) throws Exception {
        if ((GOOD_PARAMS == null) || (BAD_PARAMS == null)) {
            throw new Exception("Static parameter generation failed");
        }
        // use random data
        byte[] encryptedData = new byte[30];
        encryptedData[20] = (byte) 8;

        PKCS8EncodedKeySpec pkcs8Spec = null;

        // generate encrypted data and EncryptedPrivateKeyInfo objects
        EncryptedPrivateKeyInfo epki =
            new EncryptedPrivateKeyInfo(GOOD_PARAMS, encryptedData);
        EncryptedPrivateKeyInfo epkiBad =
            new EncryptedPrivateKeyInfo(BAD_PARAMS, encryptedData);

        // TEST#1: getKeySpec(Cipher)
        System.out.println("Testing getKeySpec(Cipher)...");
        try {
            pkcs8Spec = epki.getKeySpec((Cipher) null);
            throwException("Should throw NPE for null Cipher!");
        } catch (NullPointerException npe) {
            System.out.println("Expected NPE thrown");
        }

        // TEST#2: getKeySpec(Key)
        System.out.println("Testing getKeySpec(Key)...");
        try {
            pkcs8Spec = epki.getKeySpec((Key) null);
            throwException("Should throw NPE for null Key!");
        } catch (NullPointerException npe) {
            System.out.println("Expected NPE thrown");
        }
        try {
            pkcs8Spec = epki.getKeySpec(INVALID_KEY);
            throwException("Should throw IKE for invalid Key!");
        } catch (InvalidKeyException ikse) {
            System.out.println("Expected IKE thrown");
        }
        try {
            pkcs8Spec = epkiBad.getKeySpec(cipherKey);
            throwException("Should throw IKE for corrupted epki!");
        } catch (InvalidKeyException ike) {
            System.out.println("Expected IKE thrown");
        }
        Provider[] removedProvs = null;
        try {
            removedProvs = removeProviders(cipherAlg);
            pkcs8Spec = epki.getKeySpec(cipherKey);
            throwException("Should throw NSAE if no matching impl!");
        } catch (NoSuchAlgorithmException nsae) {
            System.out.println("Expected NSAE thrown");
            addProviders(removedProvs);
        }
        // TEST#3: getKeySpec(Key, String)
        System.out.println("Testing getKeySpec(Key, String)...");
        try {
            pkcs8Spec = epki.getKeySpec(null, "SunJCE");
            throwException("Should throw NPE for null Key!");
        } catch (NullPointerException npe) {
            System.out.println("Expected NPE thrown");
        }
        try {
            pkcs8Spec = epki.getKeySpec(cipherKey, (String)null);
            throwException("Should throw NPE for null String!");
        } catch (NullPointerException npe) {
            System.out.println("Expected NPE thrown");
        }
        try {
            pkcs8Spec = epki.getKeySpec(INVALID_KEY, "SunJCE");
            throwException("Should throw IKE for invalid Key!");
        } catch (InvalidKeyException ikse) {
            System.out.println("Expected IKE thrown");
        }
        try {
            pkcs8Spec = epkiBad.getKeySpec(cipherKey, "SunJCE");
            throwException("Should throw IKE for corrupted epki!");
        } catch (InvalidKeyException ike) {
            System.out.println("Expected IKE thrown");
        }
        try {
            pkcs8Spec = epki.getKeySpec(cipherKey, "SUN");
            throwException("Should throw NSAE for provider without " +
                           "matching implementation!");
        } catch (NoSuchAlgorithmException nsae) {
            System.out.println("Expected NSAE thrown");
        }
        try {
            Security.removeProvider("SunJCE");
            pkcs8Spec = epki.getKeySpec(cipherKey, "SunJCE");
            throwException("Should throw NSPE for unconfigured provider!");
        } catch (NoSuchProviderException nspe) {
            System.out.println("Expected NSPE thrown");
            Security.addProvider(sunjce);
        }
        // TEST#4: getKeySpec(Key, Provider)
        System.out.println("Testing getKeySpec(Key, Provider)...");
        try {
            pkcs8Spec = epki.getKeySpec(null, sunjce);
            throwException("Should throw NPE for null Key!");
        } catch (NullPointerException npe) {
            System.out.println("Expected NPE thrown");
        }
        try {
            pkcs8Spec = epki.getKeySpec(cipherKey, (Provider)null);
            throwException("Should throw NPE for null Provider!");
        } catch (NullPointerException npe) {
            System.out.println("Expected NPE thrown");
        }
        try {
            pkcs8Spec = epki.getKeySpec(INVALID_KEY, sunjce);
            throwException("Should throw IKE for invalid Key!");
        } catch (InvalidKeyException ikse) {
            System.out.println("Expected IKE thrown");
        }
        try {
            pkcs8Spec = epkiBad.getKeySpec(cipherKey, sunjce);
            throwException("Should throw IKE for corrupted epki!");
        } catch (InvalidKeyException ike) {
            System.out.println("Expected IKE thrown");
        }
        System.out.println("All Tests Passed");
    }
}