🛡️ Spring Security Learning Hub

Master Application Security with Spring Security

Complete collection of authentication and authorization implementations - from basic to JWT

Explore Projects · Get Started · Learn Security

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📖 Table of Contents

• About
• Projects
• Security Concepts
• Technologies
• Getting Started
• Contributing
• Contact

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🎯 About

This repository is your one-stop destination for mastering Spring Security. It contains multiple projects demonstrating various authentication and authorization techniques, from basic form login to JWT-based stateless authentication with role-based access control.

What You'll Master

• 🔐 Authentication - Form login, HTTP Basic, JWT tokens
• 🎫 Authorization - Role-based access control (RBAC)
• 🔑 JWT Integration - Stateless authentication
• 🌐 CORS Handling - Cross-Origin Resource Sharing
• ⚙️ Custom Providers - Build your own authentication logic

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📁 Projects

Project	Description	Key Concepts
Spring_Security_1	Foundation project	Basic security configuration
SpringSecurityAuthProviderWithoutJwt	Authentication without JWT	Custom auth providers
SpringSecurityJwtWithRole	JWT + Role Authorization	Token-based RBAC
Spring_Security_With_CustomAuthProvider	Custom authentication	Provider customization
SpringSecurityWithJwt	JWT implementation	Token generation & validation
SpringSecurityWithJwt2	Alternative JWT approach	Different JWT strategies
Spring_Security_With_JWT2_And_Role	JWT + Extended roles	Fine-grained access
SpringSecurityWithJwtCors	JWT + CORS handling	Cross-domain security
SpringSecurityWithSimpleRoleJwt2	Simplified role-JWT	Streamlined implementation
SpringSecurityWithoutJwt	Traditional security	Session-based auth
SpringSecurityWithoutJwt2	Alternative non-JWT	Different session approaches

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🔒 Security Concepts

Authentication Flow

┌─────────────────┐    Credentials    ┌──────────────────┐
│     Client      │ ───────────────► │  AuthController  │
└─────────────────┘                   └────────┬─────────┘
                                               │
                                               ▼
                                    ┌──────────────────────┐
                                    │  AuthenticationMgr   │
                                    └────────┬─────────────┘
                                             │
                          ┌──────────────────┼──────────────────┐
                          ▼                  ▼                  ▼
                   ┌──────────────┐  ┌──────────────┐  ┌──────────────┐
                   │UserDetailsSvc│  │PasswordEncoder│  │  JwtService  │
                   └──────────────┘  └──────────────┘  └──────────────┘

JWT Token Structure

┌─────────────────────────────────────────────────────────┐
│                      JWT TOKEN                          │
├─────────────────┬─────────────────┬────────────────────┤
│     HEADER      │     PAYLOAD     │     SIGNATURE      │
│  {"alg":"HS256" │  {"sub":"user"  │   HMACSHA256(      │
│   "typ":"JWT"}  │   "role":"ADMIN"│   base64(header)+  │
│                 │   "exp":1234567}│   base64(payload)) │
└─────────────────┴─────────────────┴────────────────────┘

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🛠️ Technologies

Technology	Version	Purpose
	17+	Programming Language
	3.x	Spring Boot Framework
	8.0+	Database
	3.6+	Build Tool
	Latest	API Testing

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🚀 Getting Started

Prerequisites

• Java JDK 17+
• Maven 3.6+
• MySQL Server
• Postman (for API testing)

Quick Start

# Clone the repository
git clone https://github.com/Shubh2-0/Spring_Security.git
cd Spring_Security

# Choose a project
cd SpringSecurityJwtWithRole

# Configure database in application.properties
# Update username, password, and database name

# Run the application
mvn spring-boot:run

API Testing

# Register endpoint
POST /api/auth/register
{
  "username": "user",
  "password": "password",
  "role": "USER"
}

# Login endpoint
POST /api/auth/login
{
  "username": "user",
  "password": "password"
}

# Protected endpoint (with JWT token)
GET /api/protected
Authorization: Bearer <your-jwt-token>

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📚 Learning Path

🔰 Beginner
├── Spring_Security_1 (Basic Config)
├── SpringSecurityWithoutJwt (Session-based)
│
🔵 Intermediate
├── SpringSecurityAuthProviderWithoutJwt
├── Custom Authentication Provider
│
🔴 Advanced
├── SpringSecurityWithJwt (Token-based)
├── SpringSecurityJwtWithRole (RBAC)
├── SpringSecurityWithJwtCors (CORS)
│
🏆 Expert
└── Build your own Security Architecture!

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🤝 Contributing

Security is everyone's responsibility! Contributions welcome:

• 🔐 Add new authentication patterns
• 📖 Improve documentation
• 🐛 Fix security vulnerabilities
• 💡 Suggest best practices

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📬 Contact

Shubham Bhati - Java Developer

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⭐ Star this repository if it helped you secure your applications!

Keywords: Spring-Security JWT Authentication Authorization RBAC OAuth2 Java Spring-Boot Security API-Security Token-Based-Auth

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👤 Author

• Shubham Bhati (Java Backend Engineer) - LinkedIn | Portfolio