Book Image

Hands-On Spring Security 5 for Reactive Applications

By : Tomcy John
Book Image

Hands-On Spring Security 5 for Reactive Applications

By: Tomcy John

Overview of this book

Spring Security enables developers to seamlessly integrate authorization, authentication, and a range of security features for complex enterprise applications. This book provides a hands-on approach to developing reactive applications using Spring and will help you get up and running in no time. Complete with step-by-step explanations, practical examples, and self-assessment questions, the book begins by explaining the essential concepts of reactive programming, Spring Framework, and Spring Security. You’ll then learn about a variety of authentication mechanisms and how to integrate them easily with a Spring MVC application. You’ll also understand how to achieve authorization in a Spring WebFlux application using Spring Security. Furthermore, the book will take you through the configuration required to implement OAuth2 for securing REST APIs, and guide you in integrating security in microservices and serverless applications. Finally, you’ll be able to augment add-ons that will enhance any Spring Security module. By the end of the book, you’ll be equipped to integrate Spring Security into your Java enterprise applications proficiently.
Table of Contents (15 chapters)
Title Page
Copyright and Credits
Packt Upsell

Java Authentication and Authorization Service

Java Authentication and Authorization Service (JAAS) ( implements a Java version of the standard Pluggable Authentication Module (PAM) framework. It was introduced as an optional package (extension) to the J2SDK (1.3) and then was integrated into the J2SDK 1.4.

JAAS is a standard library which provides your application with the following:

  • A representation of identity (principal) by providing credentials (username/password – subject).
  • A login service that will call back your application to gather credentials from user and then returns a subject after successful authentication.
  • A mechanism to grant necessary grants (authorization) to a user after successful authentication:

Figure 8: Working of JAAS

As shown in the preceding figure, JAAS has predefined login modules for most of the login mechanisms built in. Custom login modules can be imported or built according to...