Cryptogram

Master:

Develop:

Cryptogram in intended to combine various ciphers in one library.

Add this line to your application's Gemfile:

gem 'cryptogram'

Or use the master branch if you would like to have the latest updates:

gem 'cryptogram', github: 'mkalmykov/cryptogram'

Or install it yourself as:

$ gem install cryptogram

• Caesar cipher

require 'cryptogram'

alphabet = Array('a'..'z')
shift = 3

encryptor = Cryptogram::Ciphers::Caesar.new(alphabet: alphabet, shift: shift)

encryptor.encrypt('Pack my box with five dozen liquor jugs')
 # => "Sdfn pb era zlwk ilyh grchq oltxru mxjv

encryptor.decrypt('Sdfn pb era zlwk ilyh grchq oltxru mxjv')
 # => "Pack my box with five dozen liquor jugs"

You can also use built-in alphabet presets (lib/cryptogram/presets/alphabets.rb):

encryptor = Cryptogram::Ciphers::Caesar.new(alphabet: :english, shift: shift)

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/mkalmykov/cryptogram.

To contribute:

1. Fork it.
2. git checkout -b feature/my_awesome_feature develop
3. Create a pull request into develop.

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