internal static void ProcessCommand(ClientProcessor processor, string data)
{
if (processor.Server.AuthLogin == null)
{
processor.WriteCode(502, "5.5.1");
return;
}
if (processor.Server.Options.RequireEncryptionForAuth && !processor.Secure)
{
processor.WriteCode(538, "5.7.11");
return;
}
var args = data.Contains(" ") ? data.Split(' ') : new[] { data };
switch (args[0].ToUpper())
{
case "LOGIN":
processor.CaptureData = 2;
processor.WriteText("334 VXNlcm5hbWU6");
break;
case "PLAIN":
if (args.Length == 1)
{
processor.CaptureData = 4;
processor.WriteText("334");
}
else
{
processor.Username = AuthPlain(processor, args[1]);
if (processor.Username == null)
{
processor.WriteCode(535, "5.7.8", "Authentication credentials invalid");
}
else
{
processor.WriteCode(235, "2.7.0", "Authentication Succeeded");
}
}
break;
default:
processor.WriteCode(501, "5.7.4", "Unrecognized Authentication Method");
break;
}
}
internal static void ProcessData(ClientProcessor processor, string data)
{
switch (processor.CaptureData)
{
case 2:
processor.TempUsername = Misc.Base64.Base64Decode(data);
processor.CaptureData = 3;
processor.WriteText("334 UGFzc3dvcmQ6");
break;
case 3:
processor.CaptureData = 0;
if (processor.Server.AuthLogin == null)
{
processor.WriteCode(454, "4.7.0", "Temporary authentication failure");
return;
}
var decode = Misc.Base64.Base64Decode(data);
if (processor.TempUsername != null && decode != null && processor.Server.AuthLogin.AuthLogin(processor.TempUsername, decode, processor.RemoteEndPoint, processor.Secure))
{
processor.WriteCode(235, "2.7.0", "Authentication Succeeded");
processor.Username = processor.TempUsername;
}
else
{
processor.WriteCode(535, "5.7.8", "Authentication credentials invalid");
}
processor.TempUsername = null;
break;
case 4:
processor.CaptureData = 0;
processor.Username = AuthPlain(processor, data);
if (processor.Username == null)
{
processor.WriteCode(535, "5.7.8", "Authentication credentials invalid");
}
else
{
processor.WriteCode(235, "2.7.0", "Authentication Succeeded");
}
break;
}
}
internal static void SendCode(ClientProcessor proc, ushort code, string enhanced, string text) =>
proc.WriteText($"{code} {enhanced} {text}");
internal static void SendCode(ClientProcessor proc, ushort code) => proc.WriteText($"{code} {Codes[code]}");
