picoCTF 2022 | Fresh Java Write-up

Challenge description

Can you get the flag? Reverse engineer this Java program.

Category: Reverse Engineering


As the challenge suggested, I threw the provided program at an online Java decomplier. I used this one.

You can make out the flag by looking at each character the program checks for, from the bottom up.

The re-assembled flag reads: picoCTF{700l1ng_r3qu1r3d_84e23997}

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