Devise::UncommonPassword is an extension for the devise gem, which prevents users from signing up using one of the 100 most common passwords. The list is derived from the darkweb2017_top10K.txt found at: https://github.com/danielmiessler/SecLists/tree/master/Passwords.

Add the :uncommon_password module to your model:

class AdminUser < ApplicationRecord
  devise :database_authenticatable,
         :recoverable, :rememberable, :trackable, :validatable, :uncommon_password
end

By default, the password is checked against the 100 most common passwords that fit within the minimum and maximum lengths specified in the /config/initializers/devise.rb file. However, if a developer wants to check against a larger list, they may override this default by adding the following line to that same file:

# Number of common passwords to check entered password against.
config.password_matches = 1000

The default message for users who attempt to use a common password is:

is a very common password. Please choose something harder to guess.

This can be changed by modifying the devise.en.yml file, under errors/messages/common_password. Translations can be provided using the devise translation files in the same location.

en:
  errors:
    messages:
      common_password: 'is a very common password. Please choose something harder to guess.'

Add this line to your application's Gemfile:

gem 'devise-uncommon_password'

And then execute:

$ bundle install

You can contribute by doing the following:

• Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it
• Fork it
• Write your changes
• Test
• Commit
• Send a pull request

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