详细说明：DES算法的入口参数有三个：Key、Data、Mode。其中Key为8个字节共64位，是DES算法的工作密钥；Data也为8个字节64位，是要被加密或被解密的数据；Mode为DES的工作方式，有两种：加密或解密-The entry of the DES algorithm has three parameters: the Key, the Data and Mode.One Key to 8 bytes, a total of 64, is the job of the DES algorithm is the Key The Data for 64, 8 bytes are to be encrypted or decrypted Data Mode for DES ways of working, have two kinds: encryption or decryption