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

Asymmetric signing of a JWT token

In the previous recipes, we were symmetrically signing the access token. That is, we were using the same key to sign the payload at the Authorization Server and to validate it on the Resource Server. This recipe presents you with another approach for signing JWT using asymmetric keys, where the Authorization Server uses a private key to sign the JWT payload and the Resource Server uses a public key to validate it.

Getting ready

To run this recipe, you will need to create a Spring Boot project for the Authorization Server using Java 8, Maven, Spring Web, and Spring Security. Some dependencies will be presented in the How to do it... section.

How to do it...

This recipe shows you how to create the Authorization Server that will be defined within the jwt-asymmetric-serverproject. This project is available on GitHub in the Chapter05 folder and all you will need to create this project is presented in the next steps:

  1. You can create the jwt-asymmetric-server project...