Be sure to have TOUGH Passwords in your Rails application with this gem. Based on ZXCVBN library to validate passwords strength, also some normal validators for special characters, capital letters and lowercase letters, minimum characters length.

Add this line to your application's Gemfile:

gem 'tough'

And then execute:

$ bundle

Or install it yourself as:

$ gem install tough

 Tough.configuration do |config|
  config.zxcvbn_minimum_score_to_pass = 3
  config.zxcvbn_error_message = "is too easy to guess"
  config.special_characters_error_message = "must contain special characters"
  config.minimum_characters = 8
  config.minimum_characters_error_message = "must be a minimum of #{Tough.minimum_characters} characters long"
  config.capitals_lowercase_error_message = "must have lowercase and uppercase letters"
 end

 class User < ActiveRecord::Base
   validates_by_zxcvbn_metric :password
   validates_capitals_and_lowercase_for :password
   validates_minimum_characters_for :password
   validates_special_characters_for :password
 end

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.

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/tough. 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.

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