public static string AESEncryptToHex(string input, string key = "", string iv = "")
 {
     byte[] byteArr = AESEncrypt(input, key, iv);
     if (byteArr != null)
     {
         return(EncodingHelper.ByteArrToHexDefault(byteArr));
     }
     return(string.Empty);
 }
        public static string MD5ToHex(string input, int bit = 32)
        {
            byte[] byteArr = MD5(input);
            string result  = EncodingHelper.ByteArrToHexDefault(byteArr);

            if (bit == 16)
            {
                return(result.Substring(8, 16).ToUpper());
            }
            else
            {
                return(result.ToUpper());
            }
        }
 public static string HMAC_SHA256ToHex(string encrypt, string key = "")
 {
     byte[] hash = HMAC_SHA256(encrypt, key);
     return(EncodingHelper.ByteArrToHexDefault(hash));
 }