RubyJwk

Authenticate JWT with JWKs.

How to use my plugin.

Add this line to your application's Gemfile:

gem 'ruby_jwk'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ruby_jwk

Authentication system exposes a JWKS endpoint for each tenant, which looks like https://YOUR_DOMAIN/.well-known/jwks.json. This endpoint will contain the JWK used to verify all Authentication JWTs for this tenant. This endpoint has to be configured like below in initializer file.

RubyJwk.jwk_url = 'https://YOUR_DOMAIN/.well-known/jwks.json'
RubyJwk.skip_issuers = [] # to skip authentication for certain issuers

Suppose each tenant has different endpoint then configure it as below. Here :tenant_name gets replaced by tenant attribute in JWT payload.

RubyJwk.jwk_url = 'https://:tenant_name/.well-known/jwks.json'

To set up a controller with tenant authentication, just add this before_action

 class ApplicationController < ActionController::API
   include RubyJwk::Authenticate
   before_action :authenticate_tenant!
end

To get the JWT payload, use the following helper:

jwt_payload

To get tenant name from JWT, use the following helper:

jwt_tenant_name

Currently, we support below verifications

• Signature
• Token expiry
• nbf

https://blog.unathichonco.com/verifying-jwts-with-jwks-in-ruby

Contribution directions go here.

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