/*

 * Copyright (c) 2013, 2015 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 8005408 8079129 8048830

 * @summary KeyStore API enhancements

 * @run main StoreSecretKeyTest

 */

import java.io.*;

import java.security.*;

import java.security.cert.*;

import java.security.cert.Certificate;

import java.util.*;

import javax.crypto.*;

import javax.crypto.spec.*;

// Store a secret key in a keystore and retrieve it again.

public class StoreSecretKeyTest {

    private final static String DIR = System.getProperty("test.src", ".");

    private static final char[] PASSWORD = "passphrase".toCharArray();

    private static final String KEYSTORE = "keystore.p12";

    private static final String CERT = DIR + "/trusted.pem";

    private static final String ALIAS = "my trusted cert";

    private static final String ALIAS2 = "my secret key";

    private enum ALGORITHM {

        DES(56),

        DESede(168),

        AES(128);

        final int len;

        ALGORITHM(int l) {

            len = l;

        }

        final int getLength() {

            return len;

        }

    }

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

        boolean isSecretkeyAlgSupported = false;

        // Skip test if AES is unavailable

        try {

            SecretKeyFactory.getInstance("AES");

        } catch (NoSuchAlgorithmException nsae) {

            System.out.println("AES is unavailable. Skipping test...");

            return;

        }

        for (ALGORITHM alg : ALGORITHM.values()) {

            isSecretkeyAlgSupported |= testSecretKeyAlgorithm(alg);

        }

        if (!isSecretkeyAlgSupported) {

            throw new Exception("None of the SecretKey algorithms is "

                    + "supported");

        }

    }

    private static boolean testSecretKeyAlgorithm(ALGORITHM algorithm) throws

            Exception {

        System.out.println("Testing algorithm : " + algorithm.name());

        new File(KEYSTORE).delete();

        try {

            KeyStore keystore = KeyStore.getInstance("PKCS12");

            keystore.load(null, null);

            // Set trusted certificate entry

            Certificate cert = loadCertificate(CERT);

            keystore.setEntry(ALIAS,

            new KeyStore.TrustedCertificateEntry(cert), null);

            // Set secret key entry

            SecretKey secretKey = generateSecretKey(algorithm.name(),

                    algorithm.len);

            if(secretKey == null) {

                return false;

            }

            keystore.setEntry(ALIAS2,

                new KeyStore.SecretKeyEntry(secretKey),

                new KeyStore.PasswordProtection(PASSWORD));

            try (FileOutputStream outStream = new FileOutputStream(KEYSTORE)) {

                System.out.println("Storing keystore to: " + KEYSTORE);

                keystore.store(outStream, PASSWORD);

            }

            try (FileInputStream inStream = new FileInputStream(KEYSTORE)) {

                System.out.println("Loading keystore from: " + KEYSTORE);

                keystore.load(inStream, PASSWORD);

                System.out.println("Loaded keystore with " + keystore.size() +

                    " entries");

            }

            KeyStore.Entry entry = keystore.getEntry(ALIAS2,

                new KeyStore.PasswordProtection(PASSWORD));

            System.out.println("Retrieved entry: " + entry);

            if (entry instanceof KeyStore.SecretKeyEntry) {

                System.out.println("Retrieved secret key entry: " + entry);

            } else {

                throw new Exception("Not a secret key entry");

            }

        } catch (KeyStoreException | UnrecoverableKeyException ex) {

            System.out.println("Unable to check SecretKey algorithm due to "

                    + "exception: " + ex.getMessage());

            return false;

        }

        return true;

    }

    private static SecretKey generateSecretKey(String algorithm, int size)

        throws NoSuchAlgorithmException {

        KeyGenerator generator = KeyGenerator.getInstance(algorithm);

        generator.init(size);

        return generator.generateKey();

    }

    private static Certificate loadCertificate(String certFile)

        throws Exception {

        X509Certificate cert = null;

        try (FileInputStream certStream = new FileInputStream(certFile)) {

            CertificateFactory factory =

                CertificateFactory.getInstance("X.509");

            return factory.generateCertificate(certStream);

        }

    }

}