8 best OAuth Oauth libraries in 2023

oAuth is a protocol that provides authorization. It allows users to securely access protected resources on a remote server. The application server is the entity that provides protected resources to users. The application server issues access tokens to clients who successfully authenticated with it. The client makes an authorization request to the authorization server and receives an access token in response. The client presents this token when making requests to protected resources on the application server. The application server validates the token, extracts information about the user who owns it and authorizes or denies access for that user. Spring-security-oauth is a Spring Security OAuth module that provides support for OAuth 1.0 and OAuth 2.0 in a single, easy to use module. It's an alternative to other OAuth modules for Spring Security like spring-social, spring4d and others. Passport is a library for handling authentication in Express apps built on top of the Passport Strategy Pattern. It acts as an authentication middleware between your frontend app and the server. The main problem with it is that it's very opinionated, so if you want to change something related to user authentication, you need to dive into the source code or fork it and make the changes yourself. Popular open source oAuth libraries include