Spring JWT Token Creation and Security Authentication

Overview

This repository demonstrates how to create and manage JSON Web Tokens (JWT) for secure authentication in a Spring-based application. JWTs are widely used for stateless authentication, allowing users to authenticate without relying on server-side sessions.

Features

1. JWT Token Creation:

   • We'll cover how to generate JWTs upon successful user login.
   • The token will contain user-specific claims (such as username, roles, and expiration time).

2. Token Validation and Authentication:

   • Learn how to validate incoming JWTs.
   • Implement security filters to authenticate requests based on valid tokens.

Getting Started

1. Prerequisites:

   • Install Java and Maven.
   • Set up a Spring Boot project.

2. Clone this Repository:

   git clone https://github.com/Jeet-Codes/SpringJwt.git
   

3. Configuration:

   • Configure your Spring Security settings in application.properties or application.yml.
   • Define your secret key for JWT signing.

4. User Authentication:

   • Implement user authentication (e.g., via username/password or OAuth2).
   • Upon successful authentication, issue a JWT.

5. Token Validation:

   • Create a filter to validate incoming JWTs.
   • Extract user details from the token.

6. API Endpoints:

   • Define protected endpoints that require valid JWTs.
   • Handle unauthorized access.

Usage

1. Register/Login:

   • Register a user or log in using your preferred authentication method.
   • Receive a JWT upon successful login.

2. Access Protected Endpoints:

   • Include the JWT in the Authorization header of your requests.
   • Access protected resources (e.g., user profile, restricted APIs).

Example Code

// Example of JWT creation
String token = Jwts.builder()
    .setSubject(username)
    .claim("roles", roles)
    .setExpiration(expirationDate)
    .signWith(SignatureAlgorithm.HS512, secretKey)
    .compact();

Contributing

Feel free to contribute by opening issues or submitting pull requests. Let's make this repository better together!

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