Small changes to MQTT auth

Changed mqttPort to uint16 type
Password no longer transmitted to settings page
Chnaged topics and identifiers to last 6 bytes of mac format
Added security warning

wled00/html_settings.h

@@ -252,11 +252,13 @@ For best results, only use one of these services at a time.<br>
 Device Auth token: <input name="BK" maxlength="33"><br>
 <i>Clear the token field to disable. </i><a href="https://github.com/Aircoookie/WLED/wiki/Blynk" target="_blank">Setup info</a>
 <h3>MQTT</h3>
-Broker: <input name="MS" maxlength="32"><br>
-Port: <input name="MQTTPORT" maxlength="5"><br>
-Username: <input name="MQTTUSER" maxlength="40"><br>
-Password: <input type="password" input name="MQTTPASS" maxlength="40"><br>
-Client ID: <input name="MQTTCID" maxlength="40"><br>
+Broker: <input name="MS" maxlength="32">
+Port: <input name="MQPORT" type="number" min="1" max="65535" required><br>
+<b>The MQTT credentials are sent over an unsecured connection.<br>
+Never use the MQTT password for another service!</b><br>
+Username: <input name="MQUSER" maxlength="40"><br>
+Password: <input type="password" input name="MQPASS" maxlength="40"><br>
+Client ID: <input name="MQCID" maxlength="40"><br>
 Device Topic: <input name="MD" maxlength="32"><br>
 Group Topic: <input name="MG" maxlength="32"><br>
 <i>Reboot required to apply changes. </i><a href="https://github.com/Aircoookie/WLED/wiki/MQTT" target="_blank">MQTT info</a>

wled00/wled00.ino

@@ -3,7 +3,7 @@
  */
 /*
  * @title WLED project sketch
- * @version 0.8.5-dev #mqttauth @TimothyBrown
+ * @version 0.8.5-dev
  * @author Christian Schwinne
  */
 
@@ -98,7 +98,7 @@
 
 
 //version code in format yymmddb (b = daily build)
-#define VERSION 190817
+#define VERSION 1908181
 char versionString[] = "0.8.5-dev";
 
 
@@ -207,7 +207,7 @@ char mqttServer[33] = "";                     //both domains and IPs should work
 char mqttUser[41] = "";                       //optional: username for MQTT auth
 char mqttPass[41] = "";                       //optional: password for MQTT auth
 char mqttClientID[41] = "";                   //override the client ID
-char mqttPort[6] = "";
+uint16_t mqttPort = 1883;
 
 bool huePollingEnabled = false;               //poll hue bridge for light state
 uint16_t huePollIntervalMs = 2500;            //low values (< 1sec) may cause lag but offer quicker response

wled00/wled01_eeprom.ino

@@ -260,7 +260,8 @@ void saveSettingsToEEPROM()
   writeStringToEEPROM(2399, mqttUser, 40);
   writeStringToEEPROM(2440, mqttPass, 40);
   writeStringToEEPROM(2481, mqttClientID, 40);
-  writeStringToEEPROM(2522, mqttPort, 5);
+  EEPROM.write(2522, mqttPort & 0xFF);
+  EEPROM.write(2523, (mqttPort >> 8) & 0xFF);
 
   EEPROM.commit();
 }
@@ -481,7 +482,7 @@ void loadSettingsFromEEPROM(bool first)
     readStringFromEEPROM(2399, mqttUser, 40);
     readStringFromEEPROM(2440, mqttPass, 40);
     readStringFromEEPROM(2481, mqttClientID, 40);
-    readStringFromEEPROM(2522, mqttPort, 5);
+    mqttPort = EEPROM.read(2522) + ((EEPROM.read(2523) << 8) & 0xFF00);
   }
 
   receiveDirect = !EEPROM.read(2200);

wled00/wled02_xml.ino

@@ -308,10 +308,15 @@ void getSettingsJS(byte subPage, char* dest)
     sappend('c',"SA",notifyAlexa);
     sappends('s',"BK",(char*)((blynkEnabled)?"Hidden":""));
     sappends('s',"MS",mqttServer);
-    sappends('s',"MQTTPORT",mqttPort);
-    sappends('s',"MQTTUSER",mqttUser);
-    sappends('s',"MQTTPASS",mqttPass);
-    sappends('s',"MQTTCID",mqttClientID);
+    sappend('v',"MQPORT",mqttPort);
+    sappends('s',"MQUSER",mqttUser);
+    sappends('s',"MQPASS",mqttPass);
+    byte l = strlen(mqttPass);
+    char fpass[l+1]; //fill password field with ***
+    fpass[l] = 0;
+    memset(fpass,'*',l);
+    sappends('s',"MQPASS",fpass);
+    sappends('s',"MQCID",mqttClientID);
     sappends('s',"MD",mqttDeviceTopic);
     sappends('s',"MG",mqttGroupTopic);
     sappend('v',"H0",hueIP[0]);

wled00/wled03_set.ino

@@ -177,10 +177,11 @@ void handleSettingsSet(AsyncWebServerRequest *request, byte subPage)
     }
 
     strcpy(mqttServer, request->arg("MS").c_str());
-    strcpy(mqttPort, request->arg("MQTTPORT").c_str());
-    strcpy(mqttUser, request->arg("MQTTUSER").c_str());
-    strcpy(mqttPass, request->arg("MQTTPASS").c_str());
-    strcpy(mqttClientID, request->arg("MQTTCID").c_str());
+    t = request->arg("MQPORT").toInt();
+    if (t > 0) mqttPort = t;
+    strcpy(mqttUser, request->arg("MQUSER").c_str());
+    if (request->arg("MQPASS").charAt(0) != '*') strcpy(mqttPass, request->arg("MQPASS").c_str());
+    strcpy(mqttClientID, request->arg("MQCID").c_str());
     strcpy(mqttDeviceTopic, request->arg("MD").c_str());
     strcpy(mqttGroupTopic, request->arg("MG").c_str());
 

wled00/wled05_init.ino

@@ -69,31 +69,27 @@ void wledInit()
   //start captive portal if AP active
   if (onlyAP || strlen(apSSID) > 0)
   {
-    dnsServer.setErrorReplyCode(DNSReplyCode::ServerFailure);
-    dnsServer.start(53, "wled.me", WiFi.softAPIP());
+    dnsServer.setErrorReplyCode(DNSReplyCode::NoError);
+    dnsServer.start(53, "*", WiFi.softAPIP());
     dnsActive = true;
   }
 
   prepareIds(); //UUID from MAC (for Alexa and MQTT)
   if (strcmp(cmDNS,"x") == 0) //fill in unique mdns default
   {
     strcpy(cmDNS, "wled-");
-    strcat(cmDNS, escapedMac.c_str());
+    sprintf(cmDNS+5, "%*s", 6, escapedMac.c_str()+6);
   }
   if (mqttDeviceTopic[0] == 0)
   {
     strcpy(mqttDeviceTopic, "wled/");
-    strcat(mqttDeviceTopic, escapedMac.c_str());
+    sprintf(mqttDeviceTopic+5, "%*s", 6, escapedMac.c_str()+6);
   }
   if (mqttClientID[0] == 0)
   {
     strcpy(mqttClientID, "WLED-");
     sprintf(mqttClientID+5, "%*s", 6, escapedMac.c_str()+6);
   }
-  if (mqttPort[0] == 0)
-  {
-    strcpy(mqttPort, "1883");
-  }
 
   strip.service();
 

wled00/wled17_mqtt.ino

@@ -47,13 +47,13 @@ void onMqttConnect(bool sessionPresent)
 
   sendHADiscoveryMQTT();
   publishMqtt();
-  DEBUG_PRINTLN("MQTT ready");
+  DEBUG_PRINTLN("MQ ready");
 }
 
 
 void onMqttMessage(char* topic, char* payload, AsyncMqttClientMessageProperties properties, size_t len, size_t index, size_t total) {
 
-  DEBUG_PRINT("MQTT callb rec: ");
+  DEBUG_PRINT("MQ callb rec: ");
   DEBUG_PRINTLN(topic);
   DEBUG_PRINTLN(payload);
 
@@ -223,9 +223,9 @@ bool initMqtt()
   IPAddress mqttIP;
   if (mqttIP.fromString(mqttServer)) //see if server is IP or domain
   {
-    mqtt->setServer(mqttIP, atoi(mqttPort));
+    mqtt->setServer(mqttIP, mqttPort);
   } else {
-    mqtt->setServer(mqttServer, atoi(mqttPort));
+    mqtt->setServer(mqttServer, mqttPort);
   }
   mqtt->setClientId(mqttClientID);
   if (mqttUser[0] && mqttPass[0] != 0) mqtt->setCredentials(mqttUser, mqttPass);