/*

 * Copyright (c) 2015, 2016, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 *

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package com.sun.security.sasl.gsskerb;

import java.security.AccessController;

import java.security.PrivilegedAction;

import java.security.Provider;

import java.security.NoSuchAlgorithmException;

import java.security.InvalidParameterException;

import java.security.ProviderException;

import static sun.security.util.SecurityConstants.PROVIDER_VER;

/**

 * The JdkSASL provider class -

 * provides client and server support for GSSAPI/Kerberos v5

 */

public final class JdkSASL extends Provider {

    private static final long serialVersionUID = 8622590901641830849L;

    private static final String info = "JDK SASL provider" +

        "(implements client and server mechanisms for GSSAPI)";

    private static final class ProviderService extends Provider.Service {

        ProviderService(Provider p, String type, String algo, String cn) {

            super(p, type, algo, cn, null, null);

        }

        @Override

        public Object newInstance(Object ctrParamObj)

            throws NoSuchAlgorithmException {

            String type = getType();

            if (ctrParamObj != null) {

                throw new InvalidParameterException

                    ("constructorParameter not used with " + type + " engines");

            }

            String algo = getAlgorithm();

            // GSSAPI uses same impl class for client and server

            try {

                if (algo.equals("GSSAPI")) {

                    return new com.sun.security.sasl.gsskerb.FactoryImpl();

                }

            } catch (Exception ex) {

                throw new NoSuchAlgorithmException("Error constructing " +

                     type + " for " + algo + " using JdkSASL", ex);

            }

            throw new ProviderException("No impl for " + algo +

                " " + type);

        }

    }

    public JdkSASL() {

        super("JdkSASL", PROVIDER_VER, info);

        final Provider p = this;

        AccessController.doPrivileged(new PrivilegedAction<Void>() {

            public Void run() {

                putService(new ProviderService(p, "SaslClientFactory",

                           "GSSAPI", "com.sun.security.sasl.gsskerb.FactoryImpl"));

                putService(new ProviderService(p, "SaslServerFactory",

                           "GSSAPI", "com.sun.security.sasl.gsskerb.FactoryImpl"));

                return null;

            }

        });

    }

}