Fix and secure random number generation code

[e-mobility-charging-stations-simulator.git] / src / charging-station / ChargingStation.ts

diff --git a/src/charging-station/ChargingStation.ts b/src/charging-station/ChargingStation.ts
index 185eab5e504735608d2b3f184948fed422fcada1..575d70962c21022c1888ebac3f1ec1e90079f18b 100644 (file)
--- a/src/charging-station/ChargingStation.ts
+++ b/src/charging-station/ChargingStation.ts
@@ -85,7 +85,7 @@ export default class ChargingStation {
   }
 
   public getRandomTagId(): string {
-    const index = Math.floor(Math.random() * this.authorizedTags.length);
+    const index = Math.floor(Utils.secureRandom() * this.authorizedTags.length);
     return this.authorizedTags[index];
   }
 
@@ -453,7 +453,7 @@ export default class ChargingStation {
     const stationInfo: ChargingStationInfo = stationTemplateFromFile ?? {} as ChargingStationInfo;
     if (!Utils.isEmptyArray(stationTemplateFromFile.power)) {
       stationTemplateFromFile.power = stationTemplateFromFile.power as number[];
-      const powerArrayRandomIndex = Math.floor(Math.random() * stationTemplateFromFile.power.length);
+      const powerArrayRandomIndex = Math.floor(Utils.secureRandom() * stationTemplateFromFile.power.length);
       stationInfo.maxPower = stationTemplateFromFile.powerUnit === PowerUnits.KILO_WATT
         ? stationTemplateFromFile.power[powerArrayRandomIndex] * 1000
         : stationTemplateFromFile.power[powerArrayRandomIndex];
@@ -899,7 +899,7 @@ export default class ChargingStation {
     if (webSocketPingInterval > 0 && !this.webSocketPingSetInterval) {
       this.webSocketPingSetInterval = setInterval(() => {
         if (this.isWebSocketConnectionOpened()) {
-          this.wsConnection.ping((): void => { });
+          this.wsConnection.ping((): void => { /* This is intentional */ });
         }
       }, webSocketPingInterval * 1000);
       logger.info(this.logPrefix() + ' WebSocket ping started every ' + Utils.secondsToHHMMSS(webSocketPingInterval));
@@ -924,7 +924,7 @@ export default class ChargingStation {
         indexUrl = this.index % supervisionUrls.length;
       } else {
         // Get a random url
-        indexUrl = Math.floor(Math.random() * supervisionUrls.length);
+        indexUrl = Math.floor(Utils.secureRandom() * supervisionUrls.length);
       }
       return new URL(supervisionUrls[indexUrl]);
     }