Implementing Azure Active Directory (AAD) authentication with Node.js

Problem Statement:

Implement AAD authentication in an application’s API built on Node.js:

1. Authenticate user through AAD using NodeJS service
2. Decrypt bearer token using Nodejs service to extract user alias

Solution:

Workflow:

Code Extract:

1. Extract the bearer token from headers
2. Decode the token to extract email of the user 
3. Validate email for checking if it belongs to the organization
4. Check email validity and send alias to backend for further data authorization at backend