Fixed an issue with the AES key generation.

src/assets/js/CryptoFD.js

@@ -71,7 +71,7 @@ class CryptoFD {
 		let characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
 		let charactersLength = characters.length;
 
-		for(let i = 0; i < length; i++) {
+		for(let i = 0; i < charactersLength; i++) {
 			result += characters.charAt(Math.floor(Math.random() * charactersLength));
 		}