/*
 * Copyright (c) 2005, 2018, 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.
 */

package jdk.test.lib.net;

import java.util.*;
import java.io.*;
import java.security.*;
import java.security.cert.*;
import javax.net.ssl.*;

/**
 * Creates a simple usable SSLContext for SSLSocketFactory
 * or a HttpsServer using either a given keystore or a default
 * one in the test tree.
 *
 * Using this class with a security manager requires the following
 * permissions to be granted:
 *
 * permission "java.util.PropertyPermission" "test.src.path", "read";
 * permission java.io.FilePermission "/path/to/test/lib/jdk/test/lib/testkeys", "read";
 * The exact path above depends on the location of the test.
 */
public class SimpleSSLContext {

    SSLContext ssl;

    /**
     * loads default keystore from SimpleSSLContext
     * source directory
     */
    public SimpleSSLContext() throws IOException {
        try {
            AccessController.doPrivileged(new PrivilegedExceptionAction<Void>() {
                @Override
                public Void run() throws Exception {
                    String paths = System.getProperty("test.src.path");
                    StringTokenizer st = new StringTokenizer(paths, File.pathSeparator);
                    boolean securityExceptions = false;
                    while (st.hasMoreTokens()) {
                        String path = st.nextToken();
                        try {
                            File f = new File(path, "jdk/test/lib/net/testkeys");
                            if (f.exists()) {
                                try (FileInputStream fis = new FileInputStream(f)) {
                                    init(fis);
                                    return null;
                                }
                            }
                        } catch (SecurityException e) {
                            // catch and ignore because permission only required
                            // for one entry on path (at most)
                            securityExceptions = true;
                        }
                    }
                    if (securityExceptions) {
                        System.err.println("SecurityExceptions thrown on loading testkeys");
                    }
                    return null;
                }
            });
        } catch (PrivilegedActionException pae) {
            Throwable t = pae.getCause() != null ? pae.getCause() : pae;
            if (t instanceof IOException)
                throw (IOException)t;
            if (t instanceof RuntimeException)
                throw (RuntimeException)t;
            if (t instanceof Error)
                throw (Error)t;
            throw new RuntimeException(t);
        }
    }

    /**
     * loads default keystore from given directory
     */
    public SimpleSSLContext(String dir) throws IOException {
        String file = dir + "/testkeys";
        try (FileInputStream fis = new FileInputStream(file)) {
            init(fis);
        }
    }

    private void init(InputStream i) throws IOException {
        try {
            char[] passphrase = "passphrase".toCharArray();
            KeyStore ks = KeyStore.getInstance("PKCS12");
            ks.load(i, passphrase);

            KeyManagerFactory kmf = KeyManagerFactory.getInstance("PKIX");
            kmf.init(ks, passphrase);

            TrustManagerFactory tmf = TrustManagerFactory.getInstance("PKIX");
            tmf.init(ks);

            ssl = SSLContext.getInstance("TLS");
            ssl.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);
        } catch (KeyManagementException | KeyStoreException |
                UnrecoverableKeyException | CertificateException |
                NoSuchAlgorithmException e) {
            throw new RuntimeException(e.getMessage());
        }
    }

    public SSLContext get() {
        return ssl;
    }
}
