<?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003 Richard Heyes                                 |
// | All rights reserved.                                                  |
// |                                                                       |
// | Redistribution and use in source and binary forms, with or without    |
// | modification, are permitted provided that the following conditions    |
// | are met:                                                              |
// |                                                                       |
// | o Redistributions of source code must retain the above copyright      |
// |   notice, this list of conditions and the following disclaimer.       |
// | o Redistributions in binary form must reproduce the above copyright   |
// |   notice, this list of conditions and the following disclaimer in the |
// |   documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote      |
// |   products derived from this software without specific prior written  |
// |   permission.                                                         |
// |                                                                       |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// |                                                                       |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@php.net>                               |
// +-----------------------------------------------------------------------+
//

/**
* Client implementation of various SASL mechanisms
*
* @author  Richard Heyes <richard@php.net>
* @author  Michael Weibel <michael.weibel@amiadogroup.com> (made it work for PHP5)
* @access  public
* @version 1.0.1
* @package Auth_SASL
*/
require_once(dirname(__FILE__) . '/SASL/Exception.php');

class Auth_SASL
{
    /**
    * Factory class. Returns an object of the request
    * type.
    *
    * @param string $type One of: Anonymous
    *                             Plain
    *                             CramMD5
    *                             DigestMD5
    *                     Types are not case sensitive
    */
    public static function factory($type)
    {
        switch (strtolower($type)) {
            case 'anonymous':
                $filename  = 'SASL/Anonymous.php';
                $classname = 'Auth_SASL_Anonymous';
                break;

            case 'login':
                $filename  = 'SASL/Login.php';
                $classname = 'Auth_SASL_Login';
                break;

            case 'plain':
                $filename  = 'SASL/Plain.php';
                $classname = 'Auth_SASL_Plain';
                break;

            case 'external':
                $filename  = 'SASL/External.php';
                $classname = 'Auth_SASL_External';
                break;

            case 'cram-md5':
                $filename  = 'SASL/CramMD5.php';
                $classname = 'Auth_SASL_CramMD5';
                break;

            case 'digest-md5':
                $filename  = 'SASL/DigestMD5.php';
                $classname = 'Auth_SASL_DigestMD5';
                break;

            default:
                throw new Auth_SASL_Exception('Invalid SASL mechanism type ("' . $type .'")');
                break;
        }

        require_once(dirname(__FILE__) . '/' . $filename);
        $obj = new $classname();
        return $obj;
    }
}

?>