This code uses the Ruby JWT gem: https://github.com/jwt/ruby-jwt and runs through a couple of different scenarios.

• building a JWT with the 'none' algorithm
• building a JWT with the 'hmac' algorithm
• building a JWT with the 'rsa' algorithm
• building a JWT with the 'hmac' algorithm but verifying additional claims
• decoding an invalid JWT with the 'hmac' algorithm

bundle install

ruby <file>

Tested on ruby 2.7.1.

JWTs originally built by FusionAuth.