Maskerade

Add this line to your application's Gemfile:

gem 'maskerade'

And then execute:

$ bundle

Or install it yourself as:

$ gem install maskerade

masker = ::Maskerade::CreditCardMasker.new(:replacement_token => "X", :expose_last => 4)
masker.mask("4111-1111-1111-1111")  # "XXXX-XXXX-XXXX-1111"

masker = ::Maskerade::CreditCardMasker.new(:replacement_text => "[MASKED]")
masker.mask("4111-1111-1111-1111")  # "[MASKED]"

This gem works similar to the zendesk credit_card_sanitizer gem, but has the advantage of being able to work even when the card number is preceded or followed by extra numbers:

• E.g., it works on "Starbucks Store #555 6011 0726 6818 0642"
• See zendesk/credit_card_sanitizer#47

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.