HMAC即带密钥的HASH函数，用它产生的报文鉴别码（MAC）可以实现报文鉴别。这里我将其做成一个软件，用于对文件的合法性进行校验。以下我先简单介绍软件相关背景知识再介绍其代码实现。 -HMAC key is to bring the hash function, used the text of the report identifying code (MAC) can realize the text identification. I am here to create a soft

CRC码产生器与校验器程序 Features ： Executes in one clock cycle per data word Any polynomial from 4 to 32 bits Any data width from 1 to 256 bits Any initialization value Synchronous or asynchronous reset

CRC校验码的实现，校验码6位，寄存器串行实现方式，经项目实际验证正确-CRC Check Code realization Check 6, register serial ways, the right to verify the actual project

文件md5校验,将文件从资源管理器拖入,便可显示结果,-The file MD5 check, the files from Explorer into, can display the results,

@FFWD2001040256* 只要输出@FFWD20010402 点击计算，则可以计算出FCS校验56，适用于欧姆龙协议。(@FFWD2001040256* as long as the output @FFWD20010402 click calculation, you can calculate the FCS checksum 56, apply to the OMRON protocol.)