2024.08.23Blog on CTFs

Challenge archive: SekaiCTF 2024 - Some Trick

SekaiCTF 2024 - Cryptography.

Section
Blog on CTFs
Event began

By deut-erium.

Original description

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

Read this challenge as plain text or JSON.

Files

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.

Download

Sh
mkdir -p sekaictf-2024-some-trick
cd sekaictf-2024-some-trick
curl --fail --location --output challenge.txt \
  "https://deut-erium.github.io/challenges/sekaictf-2024/some-trick/challenge.txt"
curl --fail --location --output challenge.json \
  "https://deut-erium.github.io/challenges/sekaictf-2024/some-trick/challenge.json"
curl --fail --location --output sometrick.py \
  "https://deut-erium.github.io/assets/challenges/sekaictf-2024-some-trick/sometrick.py"
curl --fail --location --output output.txt \
  "https://deut-erium.github.io/assets/challenges/sekaictf-2024-some-trick/output.txt"

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Sources and solutions (spoilers)

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