Challenge archive: SekaiCTF 2024 - Some Trick

Challenge: Some Trick
Event: SekaiCTF - 2024
Year: 2024
Category: Cryptography
Authors: deut-erium
Mode: offline
Article: https://deut-erium.github.io/challenges/sekaictf-2024/some-trick/
Text: https://deut-erium.github.io/challenges/sekaictf-2024/some-trick/challenge.txt
JSON: https://deut-erium.github.io/challenges/sekaictf-2024/some-trick/challenge.json

Original description:
Bob and Alice found a futuristic version of opunssl and replaced all their needs for doofy wellmen.

Notes:
- Keep the version banner and all three messages in output.txt. The original program only prints these messages; it does not ask for input.
- This fixed output was generated for the post with the unchanged original program and event flag. It is not a recording from the competition.
- This is a static archive. No live challenge service or runtime simulation is provided here.

Challenge files (primary):
- sometrick.py (sometrick.py; handout)
  URL: https://deut-erium.github.io/assets/challenges/sekaictf-2024-some-trick/sometrick.py
  Bytes: 1371
  SHA-256: 41dde15411e31867b5c78f545250216149dd991ce8821b2d568838b3ba33ce66
  Upstream provenance: https://raw.githubusercontent.com/project-sekai-ctf/sekaictf-2024/e7c9183860a846dd2c4e0d1fd5d5a1fe468e1244/crypto/some-trick/dist/sometrick.py
- Fixed instance (output.txt) (output.txt; fixed-instance)
  URL: https://deut-erium.github.io/assets/challenges/sekaictf-2024-some-trick/output.txt
  Bytes: 1065
  SHA-256: bfdf22675055bf94ea7b161901affcf3cfcc446f5efcfbd0b66a41f5ee343f8b

Licenses (local copies):
- AGPL-3.0: https://deut-erium.github.io/assets/challenges/licenses/AGPL-3.0.txt
  Bytes: 34523
  SHA-256: 8486a10c4393cee1c25392769ddd3b2d6c242d6ec7928e1414efff7dfb2f07ef
  Upstream provenance: https://raw.githubusercontent.com/project-sekai-ctf/sekaictf-2022/383b16da68c438c5d516e6f00b2716210141f7a4/LICENSE
- CC BY-NC-SA 4.0: https://deut-erium.github.io/assets/challenges/licenses/CC-BY-NC-SA-4.0.txt
  Bytes: 19119
  SHA-256: 14d2138e3a8bd9448254f171b8e17130bf7104d2fd843ab0b924bd105fd00d5a
  Upstream provenance: https://raw.githubusercontent.com/project-sekai-ctf/sekaictf-2022/383b16da68c438c5d516e6f00b2716210141f7a4/LICENSE.content.md

SPOILERS - organizer files and solutions
Spoilers: organizer files and upstream source, archive, or solution links may reveal answers. Modified downloads are identified below.
Source: https://github.com/project-sekai-ctf/sekaictf-2024/blob/e7c9183860a846dd2c4e0d1fd5d5a1fe468e1244/crypto/some-trick/README.md
Archive: https://github.com/project-sekai-ctf/sekaictf-2024/tree/e7c9183860a846dd2c4e0d1fd5d5a1fe468e1244/crypto/some-trick
Solution: https://github.com/project-sekai-ctf/sekaictf-2024/tree/e7c9183860a846dd2c4e0d1fd5d5a1fe468e1244/crypto/some-trick/solution