Rating: 2.0


Guess the order of pins through trial-and error.

Pin 3: XOR of two hardcoded numbers

Pin 1: XOR or multiple hardcoded numbers

Pin 5: `rand()` after a `srand()` with a fixed number

Pin 2: `rand()` after a `srand()` with the `time()`, and it prints the time.

Pin 4: `rand()` (seeded from previous stage), a bunch of operations, and XOR+sum comparison to a fixed number.

Original writeup (https://www.nevi.dev/2020/10/13/writeup-damctf-2020/#revschlage).