下图aes加密后是二进制数组，如何转换成字符串:
let message = "未加密字符串";
log("明文: ", message);
// 密钥，由于AES等算法要求是16位的倍数，我们这里用一个16位的密钥
let key = new $crypto.Key("password12345678");
log("密钥: ", key);
// AES加密
let aes = $crypto.encrypt(message, key, "AES/ECB/PKCS5padding");
log("AES加密后二进制数据: ", aes);
log("AES解密: ", $crypto.decrypt(aes, key, "AES/ECB/PKCS5padding", {output: 'string'}));