Cryptage AES: Chiffrer en utilisant Arduino et décrypter en utilisant Java

Je veux crypter un texte en utilisant Arduino et le décrypter en utilisant Java. J'ai essayé ce code à partir de ce lien, mais sans succès.

J'utilise cette bibliothèque Arduino pour le cryptage sur Arduino et le framework Java Cryptographic Extension (JCE) pour le côté Java.

C'est le code Arduino:

#include <AESLib.h>  //replace the ( with < to compile (forum posting issue)
#include <Base64.h>

void setup() {
  Serial.begin(9600);
  uint8_t key[] = {50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50};
  //expressed in 16 unsigned in characters, be careful not to typecast this as a char in a decrypter
  //16- 50's (uint8) is the way to express 16 2's in ASCII, the encryption matches to what will show up on <a href="http://aesencryption.net/" target="_blank" rel="nofollow">http://aesencryption.net/</a>
  char data[] = "0123456789012345";
  //The message to encrypt, 16 chars == 16 bytes, no padding needed as frame is 16 bytes
  char encryptedData[100];
  int *size;
  Serial.print("Message:");
  Serial.println(data);
  aes128_enc_single(key, data);
  Serial.print("encrypted:");
  Serial.println(data);
  int inputLen = sizeof(data);
  int encodedLen = base64_enc_len(inputLen);
  char encoded[encodedLen];
  base64_encode(encoded, data, inputLen);
  Serial.print("encrypted(base64):"); //used
  Serial.println(encoded);
  Serial.println("***********Decrypter************");
  int input2Len = sizeof(encoded);
  int decodedLen = base64_dec_len(encoded, input2Len);
  char decoded[decodedLen];
  base64_decode(decoded, encoded, input2Len);
  Serial.print("encrypted (returned from Base64):");
  Serial.println(decoded);
  Serial.print("decrypted:");
  Serial.println(decoded);
}

void loop() {
}

Ceci est le code Java:

package main;

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.DatatypeConverter;

public class ForTest {
    public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
        String message= "0123456789012345";//Message to encode  
        String key = "2222222222222222";  
        // 128 bit key  -this key is processed as ASCII values  
        System.out.println("Processing 3.0 AES-128 ECB Encryption/Decryption Example");
        System.out.println("++++++++++++++++++++++++++++++++");
        System.out.println("Original Message: " + message);
        System.out.println("Key: " + key);
        System.out.println("key in bytes: "+key.getBytes("UTF-8"));
        System.out.println("==========================");           
        //Encrypter
        SecretKeySpec skeySpec_encode = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
        Cipher cipher_encode  = Cipher.getInstance("AES/ECB/NoPadding");
        //          Cipher cipher_encode = Cipher.getInstance("AES/ECB/PKCS5PADDING"); //AES-CBC with IV encoding, ECB is used without the IV, example shown on <a href="http://aesencryption.net/" target="_blank" rel="nofollow">http://aesencryption.net/</a> 
        cipher_encode.init(Cipher.ENCRYPT_MODE, skeySpec_encode);
        byte[] encrypted = cipher_encode.doFinal(message.getBytes());
        System.out.println("Encrypted String (base 64): "
                + DatatypeConverter.printBase64Binary(encrypted));
        //encode without padding: Base64.getEncoder().withoutPadding().encodeToString(encrypted));
        //encode with padding:  Base64.getEncoder().encodeToString(encrypted));
        String base64_encrypted = DatatypeConverter.printBase64Binary(encrypted);
        //Decrypter
        SecretKeySpec skeySpec_decode = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
        Cipher cipher_decode  = Cipher.getInstance("AES/ECB/NoPadding");
        //          Cipher cipher_decode = Cipher.getInstance("AES/ECB/PKCS5PADDING");
        cipher_decode.init(Cipher.DECRYPT_MODE, skeySpec_decode);
        System.out.println("length: "+"Ouril+UTDF8htLzE".length());
        byte[] decrypted_original = cipher_decode.doFinal(DatatypeConverter.parseBase64Binary("Ouril+UTDF8htLzEhiRj7wA="));
        String decrypt_originalString = new String(decrypted_original);
        System.out.println("Decrypted String: " + decrypt_originalString);
    }
}

En Java lorsque j'essaie de déchiffrer la chaîne codée par Arduino, j'obtiens ceci:

Processing 3.0 AES-128 ECB Encryption/Decryption Example
++++++++++++++++++++++++++++++++
Original Message: 0123456789012345
Key: 2222222222222222
key in bytes: [B@2a139a55
==========================
Encrypted String (base 64): Ouril+UTDF8htLzEhiRj7w==
length: 16
Exception in thread "main" javax.crypto.IllegalBlockSizeException: Input length not multiple of 16 bytes
    at com.sun.crypto.provider.CipherCore.finalNoPadding(CipherCore.java:1016)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:960)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:824)
    at com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:436)
    at javax.crypto.Cipher.doFinal(Cipher.java:2165)
    at main.ForTest.main(ForTest.java:46)

Tout des idées? Merci!