983 B
983 B
This challenge was part of GPN2024 CTF
The binary doesn't need to be analyzed and is there only for reference and to retrieve the flag with the correct license code. Template code is provided, the reversing part of the individual constraints was already done/is given.
The license key has the form XXXXX-XXXXX-XXXXX-XXXXX
The template code will mostly ignore the '-' (since the binary does it mostly as well) and license[5] will refer to the 6th X
For context:
- The binary will perform some general constraint checks on the license
- The binary will extract 4 binaries of different architectures that each contain different parts of a constraint set and are then executed
- The constraints are described in the template and the relevant arrays extracted already
To validate your license key, run the binary (it requires qemu and some dependencies, so using the Dockerfile might be easiest):
Build: docker build -t archventure .
Run: docker run --rm -it archventure