Biomechanica@TI

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main(int argc, char **argv) {

    printf("Keygen for Biomechanica keygenme v1.0\n");
    printf("Biomechanica 2010\n\n");

    srand(time(0));

    if( argc != 2 ) {
        printf("Usage: %s <username>\n", argv[0]);
        return -1;
    }

    char *serial = malloc(100), *username = malloc(100);
    int len, cnt, a;

    username = argv[1];

    len  = strlen(username);
    if( len < 10 ) {
        printf("Username must be atleast 10 characters!\n");
        return -1;
    }

    if( len > 32 )
        len = 32;

    for( cnt = 0; cnt < len; ++cnt ) {
        a = (int)username[cnt] ^ cnt;
        a %= 10;
        a += 0x30;
        serial[cnt] = a;
    }

    for(; cnt < 32; ++cnt ) {
        a = rand();
        a %= 10;
        a += 0x30;
        serial[cnt] = a;
    }


    memset(serial+8,  0x2d, 1); // memset requires an integer so we can't use the string "-"!
    memset(serial+16, 0x2d, 1);
    memset(serial+24, 0x2d, 1);

    printf("Username: %s\n", username);
    printf("Serial:   %s\n\n", serial);

    return 0;
}