break password the uses the md5 hash and return the unhashed password

#include <stdio.h>
#include <string.h>
#include <openssl/md5.h>
 
int main(int argc, char **argv)
{
    int i;
    MD5_CTX mdContext;
    unsigned char c[MD5_DIGEST_LENGTH];
 
    char *string = "This is a test";
 
    MD5_Init (&mdContext);
    MD5_Update (&mdContext, string, strlen(string));
    MD5_Final (c, &mdContext);
 
    for(i = 0; i < MD5_DIGEST_LENGTH; i++) printf("%02x", c[i]);
    printf (" %s\n", string);
 
    return 0;
}