标准的DES加密和解密算法，实现ANSI-X99MAC算法和PBOC3DES算法。他们都是用DES算法再经过一层算法实现的。-Standard DES encryption and decryption algorithms, to achieve ANSI-X99MAC algorithm and PBOC3DES algorithm. They are using DES algorithm and then through a layer of algorithm implementati