Expose binary password to MqttConnectionValidatorContext.

Source/MQTTnet.Server/Mqtt/MqttConnectionValidator.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Text;
 using System.Threading.Tasks;
 using IronPython.Runtime;
 using Microsoft.Extensions.Logging;
@@ -23,12 +22,6 @@ namespace MQTTnet.Server.Mqtt
         {
             try
             {
-                string passwordString = null;
-                if (context.Password != null)
-                {
-                    passwordString = Encoding.UTF8.GetString(context.Password);
-                }
-
                 var pythonContext = new PythonDictionary
                 {
                     { "client_id", context.ClientId },
@@ -36,7 +29,7 @@ namespace MQTTnet.Server.Mqtt
                     { "is_secure_connection", context.IsSecureConnection },
                     { "username", context.Username },
                     { "password", context.Password },
-                    { "password_string", passwordString },
+                    { "raw_password", context.RawPassword },
                     { "result", PythonConvert.Pythonfy(context.ReturnCode) }
                 };
 

Source/MQTTnet/Server/MqttConnectionValidatorContext.cs

@@ -5,11 +5,17 @@ namespace MQTTnet.Server
 {
     public class MqttConnectionValidatorContext
     {
-        public MqttConnectionValidatorContext(string clientId, string username, byte[] password, MqttApplicationMessage willMessage, string endpoint, bool isSecureConnection)
+        public MqttConnectionValidatorContext(
+            string clientId, 
+            string username, 
+            byte[] password, 
+            MqttApplicationMessage willMessage, 
+            string endpoint, 
+            bool isSecureConnection)
         {
             ClientId = clientId;
             Username = username;
-            Password = password;
+            RawPassword = password;
             WillMessage = willMessage;
             Endpoint = endpoint;
             IsSecureConnection = isSecureConnection;
@@ -19,7 +25,9 @@ namespace MQTTnet.Server
 
         public string Username { get; }
 
-        public byte[] Password { get; }
+        public string Password => Encoding.UTF8.GetString(RawPassword ?? new byte[0]);
+
+        public byte[] RawPassword { get; }
 
         public MqttApplicationMessage WillMessage { get; }