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Boruta OAuth/OpenID Connect provider core

Boruta is the core of an OAuth/OpenID Connect provider giving authorization business rules. A generator is provided to create phoenix controllers, views and templates to have a basic provider up and running.

It is intended to follow RFCs:

And specification from OpenID Connect:

This package is meant to help to provide OAuth 2.0/OpenID Connect to your applications implementing part or all of authorization code, implicit, hybrid, client credentials, or resource owner password credentials grants. It also helps introspecting and revoking tokens.


Master branch documentation can be found here

Stable documentation is hosted on

Live example

A live example can be found here

Integration example

An example of integration can be found here


  1. Schemas migration

If you plan to use Boruta builtin clients and tokens contexts, you'll need a migration for its Ecto schemas. This can be done by running:

mix boruta.gen.migration

Note: You may need to run the task above in case of package upgrade to have up to date database schema.

  1. Implement ResourceOwners context (optional)

In order to have user flows operational, You need to implement Boruta.Oauth.ResourceOwners behaviour.

Here is an example implementation:

defmodule MyApp.ResourceOwners do
  @behaviour Boruta.Oauth.ResourceOwners

  alias Boruta.Oauth.ResourceOwner
  alias MyApp.Accounts.User
  alias MyApp.Repo

  @impl Boruta.Oauth.ResourceOwners
  def get_by(username: username) do
    with %User{id: id, email: email} <- Repo.get_by(User, email: username) do
      {:ok, %ResourceOwner{sub: to_string(id), username: email}}
      _ -> {:error, "User not found."}
  def get_by(sub: sub) do
    with %User{id: id, email: email} <- Repo.get_by(User, id: sub) do
      {:ok, %ResourceOwner{sub: to_string(id), username: email}}
      _ -> {:error, "User not found."}

  @impl Boruta.Oauth.ResourceOwners
  def check_password(resource_owner, password) do
    user = Repo.get_by(User, id: resource_owner.sub)
    case User.valid_password?(user, password) do
      true -> :ok
      false -> {:error, "Invalid email or password."}

  @impl Boruta.Oauth.ResourceOwners
  def authorized_scopes(%ResourceOwner{}), do: []
  1. Configuration

Boruta provides several configuration options that you can customize in config.exs. Those have following default values:

config :boruta, Boruta.Oauth,
  repo: MyApp.Repo, # mandatory
  cache_backend: Boruta.Cache,
  contexts: [
    access_tokens: Boruta.Ecto.AccessTokens,
    clients: Boruta.Ecto.Clients,
    codes: Boruta.Ecto.Codes,
    resource_owners: MyApp.ResourceOwners, # mandatory for user flows
    scopes: Boruta.Ecto.Scopes
  max_ttl: [
    authorization_code: 60,
    access_token: 60 * 60 * 24,
    id_token: 60 * 60 * 24,
    refresh_token: 60 * 60 * 24 * 30
  token_generator: Boruta.TokenGenerator,
  issuer: "boruta"


This implementation follows an inverted hexagonal architecture, dependencies are inverted from Application layer.

In order to expose endpoints of an OAuth/OpenID Connect server with Boruta, you need implement either the behaviour Boruta.Oauth.Application or the behaviours Boruta.Oauth.AuthorizeApplication, Boruta.Oauth.TokenApplication, Boruta.Oauth.IntrospectApplication and Boruta.Oauth.RevokeApplication to integrate these endpoints separatly. Those behaviours will help you creating callback functions which will be triggered by invoking token/2, authorize/2, introspect/2 and revoke/2 functions from Boruta.Oauth module.

A generator is provided to create phoenix controllers, views and templates needed to implement a basic OAuth/OpenID Connect server.

mix boruta.gen.controllers

This task will create needed files and give you a guide to finish your setup.

Straightforward testing

You can also create a client and test it

alias Boruta.Ecto
alias Boruta.Oauth.Authorization
alias Boruta.Oauth.{ClientCredentialsRequest, Token}

# create a client
{:ok, %Ecto.Client{id: client_id, secret: client_secret}} = Ecto.Admin.create_client(%{})
# obtain a token
{:ok, %Token{value: value}} = Authorization.token(%ClientCredentialsRequest{client_id: client_id, client_secret: client_secret})
# check token
{:ok, _token} = Authorization.AccessToken.authorize(value: value)


Here are some guides helping the integration of OAuth/OpenID Connect in your systems:


It is a work in progress, all feedbacks / feature requests / improvements are welcome