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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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,
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 *
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package com.sun.security.sasl.gsskerb;

import javax.security.sasl.*;
import com.sun.security.sasl.util.PolicyUtils;

import java.util.Map;
import javax.security.auth.callback.CallbackHandler;

/**
  * Client/server factory for GSSAPI (Kerberos V5) SASL client/server mechs.
  * See GssKrb5Client/GssKrb5Server for input requirements.
  *
  * @author Rosanna Lee
  */
public final class FactoryImpl implements SaslClientFactory, SaslServerFactory {
    private static final String myMechs[] = {
        "GSSAPI"};

    private static final int mechPolicies[] = {
	PolicyUtils.NOPLAINTEXT|PolicyUtils.NOANONYMOUS|PolicyUtils.NOACTIVE
    };

    private static final int GSS_KERB_V5 = 0;

    public FactoryImpl() {
    }

    public SaslClient createSaslClient(String[] mechs,
	String authorizationId,
	String protocol,
	String serverName,
	Map<String,?> props,
	CallbackHandler cbh) throws SaslException {

	    for (int i = 0; i < mechs.length; i++) {
		if (mechs[i].equals(myMechs[GSS_KERB_V5])
		    && PolicyUtils.checkPolicy(mechPolicies[GSS_KERB_V5], props)) {
		    return new GssKrb5Client(
			authorizationId, 
			protocol, 
			serverName,
			props,
			cbh);
		}
	    }
	    return null;
    };

    public SaslServer createSaslServer(String mech,
	String protocol,
	String serverName,
	Map<String,?> props,
	CallbackHandler cbh) throws SaslException {
	    if (mech.equals(myMechs[GSS_KERB_V5])
		&& PolicyUtils.checkPolicy(mechPolicies[GSS_KERB_V5], props)) {
		if (cbh == null) {
		    throw new SaslException(
		"Callback handler with support for AuthorizeCallback required");
		}
		return new GssKrb5Server(
		    protocol, 
		    serverName,
		    props,
		    cbh);
	    }
	    return null;
    };

    public String[] getMechanismNames(Map<String,?> props) {
	return PolicyUtils.filterMechs(myMechs, mechPolicies, props);
    }
}