AES256 Encryption / Decryption

Available on: Flexs Q5C Flexs Q5 Pro Flexs Q5M

Derives an AES-256 key from a passphrase with bin.sha256(), encrypts a JSON payload, decrypts it and validates the checksum.

while(run()){

let aesKey = bin.sha256("flexscadaFlexsQ5!");
print("KEY: ", bin.toHex(aesKey));

let secretMsg = string(  {msg: "I LOVE FLEXSCADA", code: 12.454 } );

let encrypted = bin.enc(secretMsg,aesKey);
let decrypted = bin.dec(encrypted,aesKey);


print("Size (Raw, Encrypted)",secretMsg.length,encrypted.length);

if(decrypted.valid){// decryption successful and checksums valid
  let decryptedObj = JSON.parse(decrypted.data);
  print(string(decryptedObj));
} else {
  print("AES Decryption Failed.");
}


waitMS(1000);
}