简介： 用于计算输入字符串的MD5数字签名,也可以修改程序,计算某文件的MD5数字签名. // MD5 Encrypt /* POINTER defines a generic pointer type */ typedef unsigned char *POINTER; /* UINT2 defines a two byte word */ typedef unsigned short int UINT2; /* UINT4 defines a four byte word */ typedef unsigned long int UINT4; /* MD5 context. */ typedef struct { UINT4 state[4]; /* state (ABCD) */ UINT4 count[2]; /* number of bits, modulo 2^64 (lsb first) */ unsigned char buffer[64]; /* input buffer */ } MD5_CTX; /* Constants for MD5Transform routine. */