public String KEY = "Just to encrypt and decrypt";
	public Byte[] IvB = ("Dein IvB").getBytes();
	public String Salt = "Dein Salt";


	public String encrypt(String str) {
		try {
			IvParameterSpec ivspec = new IvParameterSpec(this.IvB);

			SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
			KeySpec spec = new PBEKeySpec(this.KEY.toCharArray(), salt.getBytes(), 65536, 256);
			SecretKey tmp = factory.generateSecret(spec);
			SecretKeySpec secretKey = new SecretKeySpec(tmp.getEncoded(), "AES");

			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
			cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivspec);

			return Base64.getEncoder().encodeToString(cipher.doFinal(str.getBytes("UTF-8")));
		} catch (Exception e) {
			System.out.println("Error while encrypting: " + e.toString());
		}
		return null;
	}

	public String decrypt(String str) {
		try {
			IvParameterSpec ivspec = new IvParameterSpec(this.IvB);

			SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
			KeySpec spec = new PBEKeySpec(this.KEY.toCharArray(), salt.getBytes(), 65536, 256);
			SecretKey tmp = factory.generateSecret(spec);
			SecretKeySpec secretKey = new SecretKeySpec(tmp.getEncoded(), "AES");

			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
			cipher.init(Cipher.DECRYPT_MODE, secretKey, ivspec);

			return new String(cipher.doFinal(Base64.getDecoder().decode(str)));
		} catch (Exception e) {
			System.out.println("Error while decrypting: " + e.toString());
		}
		return null;
	}


/////////////////////////////////////////////////////////////////////////////////////////////////////////////


    function encrypt(str, KEY, IvB, SALT) {
        var key = KEY;
        var iv = Buffer.from(IvB, 'utf8');
        var salt = SALT;

        key = crypto.pbkdf2Sync(key, new Buffer(salt, 'hex'), 65536, 32, 'sha256');
        var cipher = crypto.createCipheriv('aes-256-cbc', key, iv);
        cipher.setAutoPadding(true);

        var cip = cipher.update(str, 'utf8', 'base64');
        cip += cipher.final('base64');

        return cip;
    };

    function decrypt(str, KEY, IvB, SALT) {
        var key = KEY;
        var iv = Buffer.from(IvB, 'utf8');
        var salt = SALT;

        key = crypto.pbkdf2Sync(key, new Buffer(salt), 65536, 32, 'sha256');

        console.log();

        var decipher = crypto.createDecipheriv('aes-256-cbc', key, iv);
        decipher.setAutoPadding(true);

        var dec = decipher.update(str, 'base64', 'utf8');
        dec += decipher.final('utf8');

        return dec;
    }