有哪些信誉好的足球投注网站引擎那些事(32位MD5算法).docVIP

有哪些信誉好的足球投注网站引擎的那些事（32位MD5算法） 对于学过密码学的同学来说，md5算法肯定不会很陌生。但是，对于我来说，md5是一个新的命题。那什么是md5呢？md5就是对已有的数据进行加密处理。当然，它还有别的用处，什么呢？比如说，可以验证下载的软件是否完整，可以验证保存的字符串是否发生重名等等。我在这里提到这个算法，主要是为了后面一个目的，防止url重名使用的。整个算法的内容其实比较复杂的，我们自己只要学会使用就可以了。这里使用的就两个文件，一个是md5.h，另外一个是md5.c，头文件内容如下所示， [cpp] view plaincopy /* See md5.c for explanation and copyright information. */ #ifndef MD5_H #define MD5_H /* Unlike previous versions of this code, uint32 need not be exactly 32 bits, merely 32 bits or more. Choosing a data type which is 32 bits instead of 64 is not important; speed is considerably more important. ANSI guarantees that unsigned long will be big enough, and always using it seems to have few disadvantages. */ typedef unsigned long uint32; struct MD5Context { uint32 buf[4]; uint32 bits[2]; unsigned char in[64]; }; void MD5Init(struct MD5Context *context); void MD5Update(struct MD5Context *context, unsigned char const *buf, unsigned len); void MD5Final(unsigned char digest[16], struct MD5Context *context); void MD5Transform(uint32 buf[4], const unsigned char in[64]); /* * This is needed to make RSAREF happy on some MS-DOS compilers. */ typedef struct MD5Context MD5_CTX; #endif /* !MD5_H */ 源文件内容如下所示， [cpp] view plaincopy /* * This code implements the MD5 message-digest algorithm. * The algorithm is due to Ron Rivest. This code was * written by Colin Plumb in 1993, no copyright is claimed. * This code is in the public domain; do with it what you wish. * * Equivalent code is available from RSA Data Security, Inc. * This code has been tested against that, and is equivalent, * except that you dont need to include two pages of legalese * with every copy. * * To compute the message digest of a chunk of bytes, declare an * MD5Context structure, pass it to MD5Init, call MD5Update as * needed on buffers full of bytes, and then call MD5Final, which * will fill a supplied 16-byte array with the di