MD5提供基本加密设施为lua5.1：一个哈希（摘要） 功能，对隐窝/解密基于MD5和CFB，和一对隐窝/解密 对DES使用56位密钥。-MD5 offers basic cryptographic facilities for Lua 5.1: a hash (digest) function, a pair crypt/decrypt based on MD5 and CFB, and a pair crypt/decrypt based on DES with 56-bit