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 * 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,

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 *

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package com.sun.security.sasl.ntlm;

import java.util.Map;

import javax.security.sasl.*;

import javax.security.auth.callback.CallbackHandler;

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

/**

  * Client and server factory for NTLM SASL client/server mechanisms.

  * See NTLMClient and NTLMServer for input requirements.

  *

  * @since 1.7

  */

public final class FactoryImpl implements SaslClientFactory,

SaslServerFactory{

    private static final String[] myMechs = { "NTLM" };

    private static final int[] mechPolicies = {

            PolicyUtils.NOPLAINTEXT|PolicyUtils.NOANONYMOUS

    };

    /**

      * Empty constructor.

      */

    public FactoryImpl() {

    }

    /**

     * Returns a new instance of the NTLM SASL client mechanism.

     * Argument checks are performed in SaslClient's constructor.

     * @return a new SaslClient; otherwise null if unsuccessful.

     * @throws SaslException If there is an error creating the NTLM

     * SASL client.

     */

    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("NTLM") &&

                    PolicyUtils.checkPolicy(mechPolicies[0], props)) {

                if (cbh == null) {

                    throw new SaslException(

                        "Callback handler with support for " +

                        "RealmCallback, NameCallback, and PasswordCallback " +

                        "required");

                }

                return new NTLMClient(mechs[i], authorizationId,

                    protocol, serverName, props, cbh);

            }

        }

        return null;

    }

    /**

     * Returns a new instance of the NTLM SASL server mechanism.

     * Argument checks are performed in SaslServer's constructor.

     * @return a new SaslServer; otherwise null if unsuccessful.

     * @throws SaslException If there is an error creating the NTLM

     * SASL server.

     */

    public SaslServer createSaslServer(String mech,

         String protocol, String serverName, Map<String,?> props, CallbackHandler cbh)

         throws SaslException {

         if (mech.equals("NTLM") &&

                 PolicyUtils.checkPolicy(mechPolicies[0], props)) {

             if (props != null) {

                 String qop = (String)props.get(Sasl.QOP);

                 if (qop != null && !qop.equals("auth")) {

                     throw new SaslException("NTLM only support auth");

                 }

             }

             if (cbh == null) {

                 throw new SaslException(

                     "Callback handler with support for " +

                     "RealmCallback, NameCallback, and PasswordCallback " +

                     "required");

             }

             return new NTLMServer(mech, protocol, serverName, props, cbh);

         }

         return null;

    }

    /**

      * Returns the authentication mechanisms that this factory can produce.

      *

      * @return String[] {"NTLM"} if policies in env match those of this

      * factory.

      */

    public String[] getMechanismNames(Map<String,?> env) {

        return PolicyUtils.filterMechs(myMechs, mechPolicies, env);

    }

}