利用windows提供的advapi32.dll进行MD5加密

#include <windows.h>

/* Data structure for MD5 (Message-Digest) computation */
typedef struct {
    ULONG i[2]; /* number of _bits_ handled mod 2^64 */
    ULONG buf[4]; /* scratch buffer */
    unsigned char in[64]; /* input buffer */
    unsigned char digest[16]; /* actual digest after MD5Final call */
} MD5_CTX;


#define MD5DIGESTLEN 16

#define PROTO_LIST(list) list


/*
* MTS: Each of these assumes MD5_CTX is locked against simultaneous use.
*/
typedef void (WINAPI* PMD5Init) PROTO_LIST ((MD5_CTX *));
typedef void (WINAPI* PMD5Update) PROTO_LIST ((MD5_CTX *, const unsigned char *, unsigned int));
typedef void (WINAPI* PMD5Final )PROTO_LIST ((MD5_CTX *));

PMD5Init MD5Init = NULL;
PMD5Update MD5Update = NULL;
PMD5Final MD5Final = NULL;

const char *Hex2ASC(const BYTE *Hex, int Len)
{
    static char ASC[4096 * 2];
    int i; 
    
    for (i = 0; i < Len; i++)
    {
        ASC[i * 2] = "0123456789ABCDEF"[Hex[i] >> 4];
        ASC[i * 2 + 1] = "0123456789ABCDEF"[Hex[i] & 0x0F];
    }
    ASC[i * 2] = '\0';
    
    return ASC;
}


int main()
{
    MD5_CTX ctx;
    unsigned char buf[10] = "Xiaozhou";
    HINSTANCE hDLL;
    
    if ( (hDLL = LoadLibrary("advapi32.dll")) > 0 )
    {
        MD5Init = (PMD5Init)GetProcAddress(hDLL,"MD5Init");
        MD5Update = (PMD5Update)GetProcAddress(hDLL,"MD5Update");
        MD5Final = (PMD5Final)GetProcAddress(hDLL,"MD5Final");
        
        MD5Init(&ctx);
        MD5Update(&ctx,buf,8);
        MD5Final(&ctx);
        
        printf("%s \n",Hex2ASC(ctx.digest,16));
        
        
        
    }
    
    return 0;
} 

 

MD5校验：http://www.cmd5.com/