Used for the Illuminated Arcana project by Arcana Labs. Allows for the creation of periodically-rotated flags for long-running CTFs.

Requires:

• CTFd >= 3.4.1
• pyotp >= 2.6.0

1. Clone this repo to CTFd/plugins. The folder must be named "illuminarc" so that CTFd can serve the files in the assets dir.
2. Seed the appropriate values into your target images.
3. Create the necessary challenges within CTFd.

Select "illuminarc" flag type from the necessary menus when setting up new flags in challenges and add just the content of a base32-encoded shared secret for the TOTP flag.

The resulting flag will validate if: the correct secret is used to generate a TOTP password for the current 24 hour period, and the flag is expressed in the format category_challenge_<FLAG_TOKEN>. The first two parts of the flag are actually outright ignored currently but are required for appropriate string parsing.