Iterate only hex-numbers options

[smarek]

Will search hex-numers only code space, which goes like

0x00
..
0x09
0x10
0x11
..
0x20
0x21
..
0x29
0x30
..
0x99

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..151570d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+yubicrack
diff --git a/yubicrack.c b/yubicrack.c
index b38029c..17301b3 100644
--- a/yubicrack.c
+++ b/yubicrack.c
@@ -57,8 +57,27 @@ inline int bruteforce(unsigned char* t, int deep) {
        return -1;
 }
 
-int main(int argc, char** argv) {
+/* Iterate through only hex numbers values
+ * This could take a 0.625*(loooooooooong time).*/
+int bruteforceNumbers(unsigned char* t, int deep) {
+       int id = 5 - deep;
+       for (unsigned char counter = 0; counter <= 0x99; counter++) {
+                if(counter % 16 >= 10) { counter += 6; }
+               t[id] = counter;
+               if(deep > 0) if(bruteforceNumbers(t, deep - 1) == 0) return 0;
+               if(!yk_write_config(yk,
+                               coreconfig, coreconfignum,
+                               t)) {
+                       print_access_code("Fail", t);
+               } else {
+                       print_access_code("\aWin", t);
+                       return 0;
+               }
+       }
+       return -1;
+}
 
+int main(int argc, char** argv) {
        char showmessage = 1;
        if((argc == 2) && (strcmp(argv[1], "-y") == 0)) showmessage = 0;
        if(showmessage == 1) {
@@ -80,7 +99,7 @@ int main(int argc, char** argv) {
                        puts("Quitting.");
                        return EXIT_SUCCESS;
                }
-       } 
+       }
 
        yk = 0;
        unsigned char access_code[6];
@@ -118,9 +137,9 @@ int main(int argc, char** argv) {
 
        coreconfig = ykp_core_config(cfg);
        coreconfignum = ykp_config_num(cfg);
-       bruteforce(access_code, 5);
+       bruteforceNumbers(access_code, 5);
 
-       if(st) free(st);
+       if(st) ykds_free(st);
        if(!yk_close_key(yk)) {
                fputs("Can't close Yubikey! What the hell are you doing over there?", stderr);
                return EXIT_FAILURE;