ALi CTF 2 0 1 5 write up-vulnerability warning-the black bar safety net

0x00 Cake Cake is a title of Android Title, The specific process is an input a string and then initialize a length of 1 by 6 Array, then the string with this array of xor. So we just need to xor it ok. Just look at the code in reverse, the key is there are two Key looking for ok direct codes a= 0...