private void ProcessAuthIQSet(XmppStream stream, AuthIq iq, XmppHandlerContext context)
		{
			if (string.IsNullOrEmpty(iq.Query.Username) || string.IsNullOrEmpty(iq.Query.Resource))
			{
				context.Sender.SendTo(stream, XmppStanzaError.ToNotAcceptable(iq));
				return;
			}

			bool authorized = false;
			if (!string.IsNullOrEmpty(iq.Query.Digest))
			{
				authorized = AuthDigest(iq.Query.Username, iq.Query.Digest, stream, context.UserManager);
			}
			if (!string.IsNullOrEmpty(iq.Query.Password))
			{
				authorized = AuthPlain(iq.Query.Username, iq.Query.Password, stream, context.UserManager);
			}
			if (authorized)
			{
				stream.Authenticate(iq.Query.Username);

				var answer = new IQ(IqType.result);
				answer.Id = iq.Id;
				answer.To = iq.From;
				answer.From = iq.To;
				context.Sender.SendTo(stream, answer);
			}
			else
			{
				context.Sender.SendTo(stream, XmppStanzaError.ToNotAuthorized(iq));
			}
		}
		private void ProcessAuthIQGet(XmppStream stream, AuthIq iq, XmppHandlerContext context)
		{
			iq.SwitchDirection();
			iq.Type = IqType.result;
			iq.Query.AddChild(new Element("password"));
			iq.Query.AddChild(new Element("digest"));
			iq.Query.AddChild(new Element("resource"));
			context.Sender.SendTo(stream, iq);
		}