/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 */
package org.apache.qpid.client.security.scram;

import java.util.Map;
import java.util.UUID;

import javax.security.auth.callback.CallbackHandler;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslClientFactory;
import javax.security.sasl.SaslException;

public class ScramSHA256SaslClientFactory implements SaslClientFactory
{

    @Override
    public SaslClient createSaslClient(final String[] mechanisms,
                                       final String authorizationId,
                                       final String protocol,
                                       final String serverName,
                                       final Map<String, ?> props,
                                       final CallbackHandler cbh) throws SaslException
    {
        for (int i = 0; i < mechanisms.length; i++)
        {
            if (mechanisms[i].equals(ScramSHA256SaslClient.MECHANISM))
            {
                if (cbh == null)
                {
                    throw new SaslException("CallbackHandler must not be null");
                }
                return new ScramSHA256SaslClient(cbh, UUID.randomUUID().toString());
            }

        }
        return null;
    }

    @Override
    public String[] getMechanismNames(final Map<String, ?> props)
    {
        return new String[0];
    }
}