Securing a Spring Boot API with MS Entra ID (Azure AD)
Introduction Modern APIs need robust authentication to protect sensitive resources. MS Entra ID (formerly Azure Active Directory) provides enterprise-grade OAuth 2.0 authentication that integrates seamlessly with Spring Boot applications. In this article, you’ll learn how to: Register an application in MS Entra ID using Terraform Configure a Spring Boot API to validate OAuth 2.0 access tokens Implement API endpoint protection Test your secured API with real tokens This is the first article in a series on Spring Boot API security with MS Entra. Future articles will cover implementing role-based access control (RBAC) using app_roles and fine-grained authorization patterns. ...