Book Image

OAuth 2.0 Cookbook

By : Adolfo Eloy Nascimento
Book Image

OAuth 2.0 Cookbook

By: Adolfo Eloy Nascimento

Overview of this book

OAuth 2.0 is a standard protocol for authorization and focuses on client development simplicity while providing specific authorization flows for web applications, desktop applications, mobile phones, and so on. This book also provides useful recipes for solving real-life problems using Spring Security and creating Android applications. The book starts by presenting you how to interact with some public OAuth 2.0 protected APIs such as Facebook, LinkedIn and Google. You will also be able to implement your own OAuth 2.0 provider with Spring Security OAuth2. Next, the book will cover practical scenarios regarding some important OAuth 2.0 profiles such as Dynamic Client Registration, Token Introspection and how to revoke issued access tokens. You will then be introduced to the usage of JWT, OpenID Connect, and how to safely implement native mobile OAuth 2.0 Clients. By the end of this book, you will be able to ensure that both the server and client are protected against common vulnerabilities.
Table of Contents (16 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Obtaining user information from Identity Provider

Sometimes, it's not enough to retrieve just identity info from a third-party authenticated user. Depending on the application being developed, you might need to retrieve permissions or roles related to the authenticated user. OpenID Connect defines a special endpoint where the Relying Party can request user information. That's the user info endpoint, where the Identity Provider can return authorized data as a JSON object or even a signed JWT. This recipe will show you how to retrieve additional info about the user, how to discover the UserInfo endpoint, and how to update data from an already known user.

Getting ready

To run this recipe, you will need Java 8, Maven, Spring Web, and Spring Security. As this recipe adds the functionality to an OpenID Connect client, it also relies on the google-connect project, which was created for the Authenticating Google's users through Google OpenID Connect recipe. So, make sure you have implemented the source...