JWT Authentication with Spring Boot’s Inbuilt OAuth2 Resource Server

TL;DR

This article proposes a better approach to achieve  JWT authentication for your  SPA web application backend REST APIs using Spring Boot’s inbuilt  OAuth2 Resource Server. In summary, the proposed approach is:

• More Secure — Use an RSA private key instead of a _single secret token (symmetric key) _to sign JWTs and RSA public key for signature verification.
• Convenient — An endpoint (“/login”) to obtain a signed JWT in exchange for valid user credentials.
• **Authorization **— Spring Security’s method security can be used since the JWT information is available as _Authentication_at controller level; Can use “@PreAuthorize”, “@PostAuthorize” annotations with SPEL for complex authorization needs.
• Extendable — Can be extended to support federated authentication (ex: “Login with Google”, etc.) and to support refresh_tokens and client side JWT validation using_ “/jwt” _endpoint.
• Best Practices — Use Spring Boot’s inbuilt OAuth2 Resource Server for inbound request authentication with JWT.
• Scalable — This approach is stateless and JWT authentication can be scaled horizontally as desired.

Background

Recently I wanted to implement a backend REST API using Spring Boot for an SPA (single page app) written in ReactJS. I could simply use session based authentication (stateful), but it would introduce a new set of requirements like _sharing session data across backend servers (without sticky sessions) _and _session aware load balancing (sticky sessions) _when scaling horizontally. Either way, the backend will be handling the burden of maintaining each user’s session data (aka. state). Therefore, I decided to go with stateless authentication.

#jwt #rest-api #authentication #spring-security #spring-boot

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JWT Authentication with Spring Boot’s Inbuilt OAuth2 Resource Server

TL;DR

This article proposes a better approach to achieve  JWT authentication for your  SPA web application backend REST APIs using Spring Boot’s inbuilt  OAuth2 Resource Server. In summary, the proposed approach is:

• More Secure — Use an RSA private key instead of a _single secret token (symmetric key) _to sign JWTs and RSA public key for signature verification.
• Convenient — An endpoint (“/login”) to obtain a signed JWT in exchange for valid user credentials.
• **Authorization **— Spring Security’s method security can be used since the JWT information is available as _Authentication_at controller level; Can use “@PreAuthorize”, “@PostAuthorize” annotations with SPEL for complex authorization needs.
• Extendable — Can be extended to support federated authentication (ex: “Login with Google”, etc.) and to support refresh_tokens and client side JWT validation using_ “/jwt” _endpoint.
• Best Practices — Use Spring Boot’s inbuilt OAuth2 Resource Server for inbound request authentication with JWT.
• Scalable — This approach is stateless and JWT authentication can be scaled horizontally as desired.

Background

Recently I wanted to implement a backend REST API using Spring Boot for an SPA (single page app) written in ReactJS. I could simply use session based authentication (stateful), but it would introduce a new set of requirements like _sharing session data across backend servers (without sticky sessions) _and _session aware load balancing (sticky sessions) _when scaling horizontally. Either way, the backend will be handling the burden of maintaining each user’s session data (aka. state). Therefore, I decided to go with stateless authentication.

#jwt #rest-api #authentication #spring-security #spring-boot

Angular 12 + Spring Boot: JWT Authentication example | Spring Security

In this tutorial, I will show you how to build a full stack Angular 12 + Spring Boot JWT Authentication example. The back-end server uses Spring Boot with Spring Security for JWT Authentication & Role based Authorization, Spring Data JPA for interacting with database. The front-end will be built using Angular 12 with HttpInterceptor & Form validation.

Related Posts:

– Angular 12 + Spring Boot: CRUD example

– Angular 12 + Spring Boot: File upload example

– Spring Boot, MongoDB: JWT Authentication with Spring Security

Contents [hide]

• JWT (JSON Web Token)
• Angular 12 Spring Boot Authentication example
• Screenshots
• Demo
• Flow for User Registration and User Login
• Spring Boot & Spring Security for Back-end
• Overview
• Technology
• Project Structure
• Implementation
• Angular 12 for Front-end
• Overview
• Technology
• Project Structure
• Implementation
• Conclusion
• Further Reading

#angular #full stack #spring #angular #angular 12 #authentication #authorization #jwt #login #registration #security #spring boot #spring security #token based authentication

Spring Security Authentication Process : Authentication Flow Behind the Scenes

In every application, Authentication is the first layer of protection. Thus, Authentication is a major part of Application Security and in this post we will dive deep into the architecture used by **Spring Security **for Authentication.

What is Authentication?_ Authentication is proving who you are. For example, your Identity Card is used to “authenticate” you in your School/College/Office campus._

Spring Security provides excellent support for Authentication by default. Kind of in a plug-in-and-play fashion. A simple Authentication workflow is really easy to setup. However, if you wanna go for a complete custom implementation then you need to understand the authentication flow and comprehend what happens behind the scenes when an authentication request is received by the server.

#spring-security #spring #authentication #rest-api #spring-boot #spring security authentication process : authentication flow behind the scenes

Angular 11 + Spring Boot: JWT Authentication example (with Authorization)

In this tutorial, I will show you how to build a full stack Angular 11 + Spring Boot JWT Authentication example. The back-end server uses Spring Boot with Spring Security for JWT Authentication & Authorization, Spring Data JPA for interacting with database. The front-end will be built using Angular 11 with HttpInterceptor & Form validation.

Github Source code:
https://github.com/bezkoder/angular-11-spring-boot-jwt-authentication

Angular 11 Spring Boot Authentication example

It will be a full stack, with Spring Boot for back-end and Angular 11 for front-end. The system is secured by Spring Security with JWT Authentication.

User can signup new account, login with username & password.
Authorization by the role of the User (admin, moderator, user).

Screenshots

Here are UI screenshots of our system.

– Anyone can access a public page before logging in:

– New user registration:

– Signup Form Validation:

– After signup is successful, User can login:

-Loggedin User can access Profile page/ User page:

– This is UI for admin:

– If a User who doesn’t have Admin role tries to access Admin/Moderator Board page:

Demo

This is full Angular + Spring Boot JWT authentication demo (with form validation, check signup username/email duplicates, test authorization with 3 roles: Admin, Moderator, User).

Flow for User Registration and User Login

The diagram shows flow for User Registration process and User Login process.

It’s not too difficult to understand. We have 2 endpoints for authentication:

• api/auth/signup for User Registration
• api/auth/signin for User Login

If Client wants to send request to protected data/endpoints, a legal JWT must be added to HTTP Authorization Header.

Spring Boot & Spring Security for Back-end

Angular 11 for Front-end

For more details, please visit:
https://bezkoder.com/angular-11-spring-boot-jwt-auth/

Github Source Code:
https://github.com/bezkoder/angular-11-spring-boot-jwt-authentication

#angular #spring-boot #jwt #authentication #spring #security

How to Build a Token-based authentication server using Spring Boot and Spring Security

Hey folks, what’s up? Let’s build up a server application using Spring Boot that is secured with Spring Security. Before that, the reason I’m writing this article is I struggled a lot in understanding the whole architecture of Spring Security and the token-based authentication when I started working on it and after successful output, I thought I can share this with everyone. So I’m creating this tutorial. And by the way, I’m not gonna explain the whole architecture here as the title says. So, if you wanna know about the architecture, I have given the official document link at the end of this blog. Feel free to provide the feedback and suggestions, if I had missed anything. Getting onto the topic, we’ll be using JWT**, **which is fast and stateless, and also has it’s equivalent disadvantages, as auth token to authenticate our clients.

Typically, this type of authentication mechanism will be used in Microservices architecture where the entire application is broken up into small and individual modules that work independently. Of course, they are inside the distributed network, and hence the common data among the services can be shared either via on-demand HTTP requests or using tools that support pub/sub technique like Apache Kafka. Alright, let’s get started.

#authentication #spring-security #java #jwt #spring-boot