Pwned

Troy Hunt's Pwned Passwords API V2 allows you to check if a password has been found in any of the huge data breaches.

Pwned is a Ruby library to use the Pwned Passwords API's k-Anonymity model to test a password against the API without sending the entire password to the service.

The data from this API is provided by Have I been pwned?. Before using the API, please check the acceptable uses and license of the API.

Installation

Add this line to your application's Gemfile:

gem 'pwned'

And then execute:

$ bundle

Or install it yourself as:

$ gem install pwned

Usage

To test a password against the API, instantiate a Pwned::Password object and then ask if it is pwned?.

password = Pwned::Password.new("password")
password.pwned?
#=> true

You can also check how many times the password appears in the dataset.

password = Pwned::Password.new("password")
password.pwned_count
#=> 3303003

Since you are likely using this as part of a signup flow, it is recommended that you rescue errors so if the service does go down, your user journey is not disturbed.

begin
  password = Pwned::Password.new("password")
  password.pwned?
rescue Pwned::Error => e
  # Ummm... don't worry about it, I guess?
end

Advanced

You can set options and headers to be used with open-uri when making the request to the API. HTTP headers must be string keys and the other options are available in the OpenURI::OpenRead module.

password = Pwned::Password.new("password", { 'User-Agent' => 'Super fun new user agent' })

TODO

• [ ] Rails validator
• [ ] Devise plugin

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/philnash/pwned. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

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

Code of Conduct

Everyone interacting in the Pwned project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.