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#include <stdio.h>
#include "crc32.h"

//https://www.tools4noobs.com/online_php_functions/crc32/
int crc = 0x36e85653;

static const char alphabeth_small[] = "abcdefghijklmnopqrstuvwxyz";
static const char alphabeth_big[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRTSUVWXYZ1234567890";

int bruteforce_start(int strart, char* password, int level) {
    int i;
    for(i = strart; i < 26; i++) {
        password[level] = alphabeth_small[i];
        bruteforce_loop(password, level + 1);
    }
}

int bruteforce_loop(char* password, int level) {
    int i;
    for(i = 0; i < 26; i++) {
        password[level] = alphabeth_small[i];
        if(level == 6) {
            bruteforce_check(password, level + 1);
        } else {
            bruteforce_loop(password, level + 1);
        }
    }
}

int bruteforce_check(char* password, int level) {
    int i;
    for(i = 0; i < 26; i++) {
        password[level] = alphabeth_small[i];
        if(crc32(password, 8) == 0x36e85653) {
            printf("password = %s\n", password);
        }
    }
    return 0;
}

int main() {
    char password[9];
    password[8] = '\0';

    //bruteforce_start(1, password, 0); // <-- 0 means aaaaaaaa
    bruteforce_start(1, password, 13); // <-- 15 means paaaaaaa
}