Book Image

Keycloak - Identity and Access Management for Modern Applications

By : Stian Thorgersen, Pedro Igor Silva
Book Image

Keycloak - Identity and Access Management for Modern Applications

By: Stian Thorgersen, Pedro Igor Silva

Overview of this book

Implementing authentication and authorization for applications can be a daunting experience, often leaving them exposed to security vulnerabilities. Keycloak is an open-source solution for identity management and access management for modern applications, which can make a world of difference if you learn how to use it. Keycloak, helping you get started with using it and securing your applications. Complete with hands-on tutorials, best practices, and self-assessment questions, this easy-to-follow guide will show you how to secure a sample application and then move on to securing different application types. As you progress, you will understand how to configure and manage Keycloak as well as how to leverage some of its more advanced capabilities. Finally, you'll gain insights into securely using Keycloak in production. By the end of this book, you will have learned how to install and manage Keycloak as well as how to secure new and existing applications.
Table of Contents (21 chapters)
Section 1: Getting Started with Keycloak
Section 2: Securing Applications with Keycloak
Section 3: Configuring and Managing Keycloak
Section 4: Security Considerations

Changing the look and feel

One of the main customization hooks – and probably what people use most – is changing Keycloak built-in themes to fit into your branding and to respect your UI and UX requirements.

Keycloak provides an amazingly simple experience for changing themes and allows you to change most – if not all – of its UI, from the end user-facing pages to the administration console itself.

In this topic, you will learn about the basics of theming by going through examples of how to change the look and feel of the login page. By understanding these basics, you should then be able to apply the same concepts to any other UI you want to customize.


This is probably one of the most documented features of Keycloak. Consider looking at the documentation available at

Understanding themes

Just like any other feature in Keycloak, themes are backed by their own SPI. However...