/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright (c) 2003-2008 by AG-Software 											 *
 * All Rights Reserved.																 *
 * Contact information for AG-Software is available at http://www.ag-software.de	 *
 *																					 *
 * Licence:																			 *
 * The agsXMPP SDK is released under a dual licence									 *
 * agsXMPP can be used under either of two licences									 *
 * 																					 *
 * A commercial licence which is probably the most appropriate for commercial 		 *
 * corporate use and closed source projects. 										 *
 *																					 *
 * The GNU Public License (GPL) is probably most appropriate for inclusion in		 *
 * other open source projects.														 *
 *																					 *
 * See README.html for details.														 *
 *																					 *
 * For general enquiries visit our website at:										 *
 * http://www.ag-software.de														 *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ 

using System;

using agsXMPP;
using agsXMPP.Xml.Dom;
using agsXMPP.protocol.sasl;

namespace agsXMPP.sasl.Anonymous
{
    /// <summary>
    /// SALS ANONYMOUS Mechanism, this allows anonymous logins to a xmpp server.
    /// </summary>
    public class AnonymousMechanism : Mechanism
    {
        /*
            S: <stream:features>
                    <mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>
                        <mechanism>DIGEST-MD5<mechanism>
                        <mechanism>ANONYMOUS<mechanism>
                    </mechanisms>
               </stream:features>
            
            * So, the proper exchange for this ANONYMOUS mechanism would be:

            C: <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='ANONYMOUS'/>
            S: <success xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>

            or, in case of the optional trace information:

            C: <auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='ANONYMOUS'>
                    c2lyaGM=
               </auth>
            S: <success xmlns='urn:ietf:params:xml:ns:xmpp-sasl'/>

        */

        /// <summary>
        /// 
        /// </summary>
        public AnonymousMechanism()
        {
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="con"></param>
        public override void Init(XmppClientConnection con)
        {            
            con.Send(new Auth(MechanismType.ANONYMOUS));
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="e"></param>
        public override void Parse(Node e)
        {
            // *No Challenges* in SASL ANONYMOUS
        }
    }
    
}
