Rails::ParamCryptable

A simple gem for Rails >= 5.2, that can encrypt URL parameters, intentionally meant to help you obfuscate ordinary IDs without having to rely on a separate database-stored secret token.

Turns your

Installation

Add this line to your application's Gemfile:

gem 'rails-param_cryptable'

And then execute:

$ bundle install

Usage

In this example, we will encrypt the ID of our OrdersController, turning example.com/orders/123 into example.com/orders/203e39202d326d13

In your credentials (rails credentials:edit --environment=production), add a 16-bytes long value for param_cryptable_key.

param_cryptable_key: CTYcQtYN3ELVM5Lu

In your controller:

class OrdersController < ApplicationController
  include ParamCryptable

  crypt_param :id

This will automagically expect the :id param to be encrypted, and decrypt it for you.

And wherever you want to create an URL:

# From within the controller
  orders_path(encrypt(@order.id))

# From everywhere else
module OrdersHelper
  def my_link_href_helper
    order_path(ParamCryptable.encrypt(@order.id))
  end
end

Possible future features

• SPECS!!!
• Salting / padding, to decrease the chance of "guessability"
• Initializion script that adds a key to the credentials
• Integration with ActiveRecord and/or URL helpers so you don't have to call encrypt

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/rails-param_cryptable. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.s