parasol

CAPTURE THE FUTURE.

About

parasol is a score server application for "Capture the Flag" (CTF) contest made with Ruby on Rails.

Requirements

• Ruby 2.1
• PostgreSQL 9.3
• Bundler

Packages

On Ubuntu, you may need to install these packages to install required gems:

• build-essential
• ruby-dev
• libpq-dev

On CentOS? Sorry, I have no idea...

Setup

1. Clone this repository.
2. Create an user on PostgreSQL. The user name is parasol by default (it can be changed by modifying database.yml). Note that the user should be able to create databases. If not, you must create databases by your hand.
3. Run rake db:create
4. Check the database. There will be parasol_{development,test,production}. The name of database depends on the environment variable RAILS_ENV.
5. Run rake db:migrate
6. Run rails s. Enjoy!

Admin

There is no admin accounts after the setup completed. To add an admin user:

bin/rake admin:create_user EMAIL='email@address.here' PASSWORD='passw0rd_here'

After the admin account created, you can # as an admin from /admin.

Notes

For production use, you should set the environment variable RAILS_ENV to production and use foreman start to start the server instead of rails s.

Remarks

Flag Matching

parasol uses Regexp to compare the submitted flag and the answer. So, be careful when you set the flag word which contains ?, *, and any other regexp's metacharacters.

Scoring

Flag point modification affects scores of already answered players

parasol calculates the score when it is requested. It means that the player's score will be changed when the flag's point is changed.

For example,

1. Player A submits the correct flag for challenge X (100pts.)
2. A's score is changed to 100 pts.
3. The admin changed the point for X to 200 pts.
4. A's score is changed to 200 pts.

First-break Point and Point Modification

The first-break point (a.k.a. first-blood point) feature is implemented as "score adjustment". If it is enabled, the adjustment point is calculated when the player solves the problem, and it is fixed. Modification of the flag's point will not affect to the first-break point. If you want to fix it, you should do it by your hand.

License

This program is licensed under the MIT License. See LICENSE.

Copyright

Copyright (c) 2014 Mei Akizuru (mayth)

Twitter: @maytheplic