jwk-loader

This gem can be used in combination with the ruby-jwt gem as the mechanism to load and cache the JWKs.

Install the gem and add to the application's Gemfile by executing:

$ bundle add jwk-loader

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install jwk-loader

require "jwt"
require "jwk-loader"

JWT.decode(token, nil, true, algorithm: "RS512", jwks: JwkLoader.for_uri(uri: "https://url/to/public/jwks") )

When testing HTTP endpoints protected by asymmetric JWT keys the mechanism in jwk_loader/test can be used to simplify the process.

require 'jwk_loader/test'

RSpec.describe 'GET /protected' do
  include JwkLoader::Test

  context 'when called with a valid token' do
    let(:token) { sign_test_token(token_payload: { user_id: "user" }, jwk_endpoint: "https://url/to/public/jwks") }
    subject(:response) { get('/protected', { 'HTTP_AUTHORIZATION' => "Bearer #{token}" }) }

    it 'is a success' do
      expect(response.status).to eq(200)
    end
  end
end

require "jwt-loader"

JwkLoader.configure do |config|
  config[:cache] = YetAnotherCache.new
  config[:cache_grace_period] = 999
end

or in alternative

require "jwt-loader"

JwkLoader.configure do |config|
  config.cache = YetAnotherCache.new
  config.cache_grace_period = 999
end

After checking out the repo, run bundle install to install dependencies. Then, run bundle exec rspec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

Bug reports and pull requests are welcome on GitHub at https://github.com/anakinj/jwk-loader. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

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

Everyone interacting in the Jwk::Loader project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.