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entra-springboot-react-auth

Implements Microsoft Entra ID authentication for Spring Boot backends and React frontends using OAuth2 PKCE.

9|6|Updated Aug 25, 2017
Search Tags:#authentication#react#jwt#spring boot#oauth2#msal#microsoft entra
One-click install
npx skills add https://github.com/sergueik/springboot_study --skill entra-springboot-react-auth-sergueik
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: entra-springboot-react-auth
Source: https://github.com/sergueik/springboot_study/tree/main/basic-skill-registry/custom/skills/entra-springboot-react-auth
Command: npx skills add https://github.com/sergueik/springboot_study --skill entra-springboot-react-auth-sergueik

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Setting up Microsoft Entra ID authentication across a Spring Boot backend and React frontend involves many moving parts—app registration, PKCE flow, JWT validation, MSAL configuration, and role mapping—where small misconfigurations cause hard-to-diagnose 401 and 403 errors. ## Core Features & Use Cases - Backend Resource Server Setup: Guides Spring Security 6 configuration with SecurityFilterChain, JWT issuer validation, and method-level authorization via @PreAuthorize. - React MSAL Integration: Covers MsalProvider setup, silent token acquisition, and attaching Bearer tokens to API requests. - Troubleshooting Guidance: Maps common 401, 403, and AADSTS errors to root causes like audience mismatch, redirect URI issues, and missing consent. - Use Case: A developer building a Java 17 / Spring Boot 3 API with a React SPA can follow this Skill to register the app in Entra, protect endpoints with app roles, and wire up login/logout in the frontend. ## Quick Start Use this skill to add Microsoft Entra ID login to my Spring Boot 3 backend and React frontend with PKCE and JWT validation.

Frequently Asked Questions about entra-springboot-react-auth

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I add Microsoft Entra ID authentication to a Spring Boot and React app?▼

Register an application in Microsoft Entra with a SPA redirect URI, configure the React frontend with @azure/msal-browser and @azure/msal-react, and set up the Spring Boot backend as an OAuth2 resource server validating JWTs via the issuer-uri property.

How to validate JWT tokens in Spring Security 6 resource server?▼

Configure spring.security.oauth2.resourceserver.jwt.issuer-uri pointing to your Entra tenant, then define a SecurityFilterChain bean with oauth2ResourceServer and jwt defaults. Spring Security handles signature, issuer, audience, and expiration validation automatically.

Should a React SPA use a client secret with MSAL?▼

No, single-page applications must not use client secrets. Use the Authorization Code Flow with PKCE through MSAL Browser, which is designed for public clients that cannot securely store secrets.

Why do I get 401 errors with Entra access tokens?▼

A 401 usually indicates an invalid audience, expired token, wrong issuer, or a missing Authorization header. Verify the token's aud claim matches your API's client ID and that the issuer-uri configuration matches your tenant.

How do I map Entra app roles to Spring Security authorities?▼

Use @EnableMethodSecurity with @PreAuthorize annotations such as hasAuthority('APPROLE_Admin') or hasRole('Admin'). Map the roles or scp claims from the JWT into GrantedAuthority using Spring Security converters rather than manual parsing.

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