CTFStrap

Reduce time to make a CTF structure, Focus on your challenge.

With CTFStrap, you can make your own CTF using fully-customizable features.

Installation

Download Source Code

$ git clone https://github.com/devonnuri/CTFStrap.git

Edit .env file

Frontend (/ctfstrap-frontend/.env)

# URL of backend server
REACT_APP_BACKEND_URL=http://localhost:5000

Backend (/ctfstrap-backend/.env)

# URL of frontend serer
FRONTEND_URL=http://localhost:3000
# Port of backend server
BACKEND_PORT=5000
# Type of database server
DB_TYPE=postgresql
# Hostname of database server
DB_HOST=localhost
# Name of database you will use
DB_NAME=ctfstrap
# Username of database server
DB_USERNAME=ctfstrap
# Password of database server
DB_PASSWORD=password
# Secret token key for jsonwebtoken
SECRET_TOKEN_KEY=VERY_SECRET_KEY
# Upload directory of challenge files
UPLOAD_DIR=./uploads

Build & Run

Note : Environment variables from frontend .env file will be embedded during buildtime. Please rebuild after changing frontend .env file

$ cd ctfstrap-backend
$ npm install   # or yarn install
$ npm run build # or yarn build

$ cd ../

$ cd ctfstrap-frontend
$ npm install   # or yarn install
$ npm run build # or yarn build

Run server

$ node ctfstrap-backend/build/index.js

$ npm install serve -g # or yarn global add serve
$ serve -s ctfstrap-frontend/build/ -p {PORT}

Features

Most of the features are currently in process or not featured.

Challenges

• Filter/Search
  • (Un)Solved problem, Problem type, Difficulty
• Order
  • Alphabetical, Problem type, Solved count, Difficulty (Ascending and Descending)
• Customizable Hint Open Type
  • By Coin: Can Open Hints by coin (with using coin system)
  • After Time: Open publicly after specific time
  • None: No hint at all. Yeah, it's no mercy.
• Customizable Challenge Open Type
  • By Coin: Can Open Hints by coin (with using coin system)
  • Normal: Just Open from the beginning
  • After Time: Open after specific time
  • Chain: When a challenge has been solved, the other challenge will be opened.
• Authentication System - Flag Format(Prefix)

  • Flag Type - Normal: Single Flag (Same For All)

  • Multiple: Multiple Flag (Match with Any Flag)

  • Random L33T: Different flag for each solver id (Replace Normal flag to L33T Flag, Provide Endpoint to get Random Flag)

    ex) FLAG{TH!S_IS_FL4G}, FLAG{THI$_1S_FL@G}, ...

• Customizable Problem Point

  • Fixed Point: Literally Whoever Whenever Same Point

  • Balanced Point: Decreasing Point depends on solver count (Same for all solver, Customizable offset)

    Point = max(InitialPoint - SolverCount * DecreasingPointPerSolver, MinPoint)
    

  • Graded Point: Decreasing Point depends on solver (Not Changed after solver has increased, Customizable offset)

    Point = max(InitialPoint - NthSolver * (DecreasingPointNthSolver - 1), MinPoint)
    

Contributing

Hey! I found a security vuln!

• Shh... Take it easy.. DO NOT MAKE A GITHUB ISSUE!

  There might be a villain that abuses the vuln to make a filthy profit.

  Feel free to send me email to devonnuri@gmail.com

Hmm.. I think it's not going my way!

• Double Check whether there aren't existing Github Issues about the bug.

• If you can't look it up, you're ready to report the bug to Github Issues.

• Make sure that your issue is fully understandable.

Hooray! I made a patch that implements new features!

• Make a new pull request!

• Describe your code in detail.

• Ready for our collaborators to accept your PR.

Oh.. Your Repo is great! I want to give you help consistently.

• Feel free to send me email to devonnuri@gmail.com for inviting you as a collaborator.

• If you send me with a brief self introduction and GitHub ID, it will be helpful for you to refer to it.