add some fancy magic :kekw:

lib/key_generator.js

@@ -1,15 +1,18 @@
-var KeyGenerator = function() {
-	this.keyspace = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
-};
+const crypto = require('crypto');
 
-KeyGenerator.prototype.createKey = function(keyLength) {
-	var key = '';
-	var index;
-	for (var i = 0; i < keyLength; i++) {
-		index = Math.floor(Math.random() * this.keyspace.length);
-		key += this.keyspace.charAt(index);
-	}
-	return key;
-};
+class KeyGenerator {
+    constructor() {
+        this.keyspace = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+    }
 
-module.exports = KeyGenerator;
+    createKey(keyLength) {
+        const buffer = crypto.randomBytes(keyLength);
+        let key = '';
+        for (let i = 0; i < buffer.length; i++) {
+            key += this.keyspace.charAt(buffer[i] % this.keyspace.length);
+        }
+        return key;
+    }
+}
+
+module.exports = KeyGenerator;