ACSC 2021 Challenge Repository

The format is based on zer0pts CTF repository. This might be changed according to the design of the scoreboard.

Directory Structure

The directory for each challenge is /<category>/<challenge_name>. The challenge directory has 3 folders: challenge, distfiles, and solution.

• challenge: Files necessary for building the task (source code, flag, etc)
• distfiles: Files to be distributed to the competitors (if any)
• solution: Scripts of the intended solution

Along with the 3 folders, you must put task.yml. (See the next section.)

If your task runs on docker, you can put docker-compose.yml and Dockerfile right under the challenge directory.

Example:

.
|-- pwn/
|    |-- histogram/
.    .    |-- challenge/
.    .    |-- distfiles/
.    .    |-- solution/
          |-- Dockerfile
          |-- docker-compose.yml
          +-- task.yml

Challenge Information

You need to provide the information of your task in YAML format in task.yml. The file must contain the following information:

• name: Challenge name
• description: Challenge description (HTML)
• flag: FLAG
• author: Challenge author
• tags: Choose tags from pwn, web, crypto, rev, forensics, hardware, ppc, warmup

Additionally, you can put the following information:

• port: Port number

The tokens {host} and {port} in task.yml are converted into the host name and port number respectively.

Example 1:

---
name: "welcome"
description: >
  <p>The flag is written in Discord</p>
flag: "ACSC{W3lc0m3W3lc0m3}"
author: "ACSC organization"
tags:
- welcome

Example 2:

---
name: "just nc"
description: >
  <p>Just nc</p><br>
  <code>nc {host} {port}</code>
flag: "ACSC{hogehogehugahuga}"
author: ptr-yudai
port: 1337
tags:
- pwn
- warmup