OAuth 2.0 Authorization Server

The OAuth 2.0 Authorization Server allows a web application to provide Authorization and Authentication to Clients based on the OAuth 2.0 Specification and its profiles OpenID Connect and User-Managed Access 2.0.

Integrations

This package is an implementation of the OAuth 2.0 Authorization Server in NodeJS + Typescript. It provides multiple layers of abstraction for various methods of integration with different frameworks, as well as different levels of control over the OAuth 2.0 Authorization Process.

Middlewares

The highest level of integration comes in the form of Middlewares for the various web frameworks of NodeJS. These middlewares only need a Configuration object and the implementation of the necessary Services.

The currently implemented Middlewares are:

• [x] ExpressJS

Providers

The next level of integration comes in the form of Providers.

A Provider is an implementation of the AuthorizationServer abstract class for the various web frameworks of NodeJS. It has helper methods for creating OAuth 2.0 Requests based on the request object of the web framework and for parsing an OAuth 2.0 Response into the response object of the web framework. It can also provide custom properties or methods for the specific web framework, such as the ExpressJS Router in the ExpressProvider.

Providers need to be decorated with the AuthorizationServerMetadata decorator.

The currently implemented Providers are:

• [x] ExpressJS

Authorization Server Abstract Class

The next level of integration is represented by the AuthorizationServer. It provides the barebones structure for a functioning implementation of the OAuth 2.0 Authorization Server by exposing the endpoints injected during its creation.

The AuthorizationServer class needs to be decorated with the AuthorizationServerMetadata decorator. This decorator receives an object containing the Configuration of the OAuth 2.0 Authorization Server and injects their implementations into the created instance.

Low level implementations

The last level of integration is defined as using the low-level implementations directly into your code.

Venturing into this level is a double-edged sword, since, on one hand, it provides a high level of freedom for customizing the behaviour of the OAuth 2.0 Authorization Server, but, on the other hand, it also means that there is a lot of room for misconfiguration, logic breaks and overall effort to put together all the pieces of the OAuth 2.0 Specification into one cohesive deployment.