Example of a guardian configuration using a private and public pem file

This is just an example of how to get up and running and should not be used in production

Highlights

Pem files are put in the priv folder and fetched with the secret handler which is configured in the config file.

config :pem_guardian, PemGuardian.Guardian,
  issuer: "pem_guardian",
  allowed_algos: ["RS512"],
  secret_fetcher: PemGuardian.SecretFetcher

def fetch_signing_secret(_module, _opts) do
    secret =
      "rsa-2048.pem"
      |> fetch()

    {:ok, secret}
  end

  def fetch_verifying_secret(_module, _headers, _opts) do
    secret =
      "rsa-2048.pub"
      |> fetch()

    {:ok, secret}
  end

  defp fetch(relative_path) do
    :code.priv_dir(:debug_guardian)
    |> Path.join(relative_path)
    |> JOSE.JWK.from_pem_file()
  end

Example can be verified with the following commands

{:ok,token,_} = PemGuardian.Guardian.encode_and_sign(%{id: "1"})
PemGuardian.Guardian.decode_and_verify(token)