Pro Authentication Suite (v3.0)

A professional-grade multi-threaded Java application featuring enterprise-level secure authentication with Role-Based Access Control (RBAC), comprehensive audit logging, advanced admin panel, and real-time notifications.

✨ New in v3.0

• 🔐 Role-Based Access Control: Three role levels (ADMIN, MODERATOR, USER) with granular permission system
• 📋 Comprehensive Audit Logging: Track all operations with timestamps, user, IP, and status
• 👨‍💼 Admin Panel: Manage users, assign roles, suspend/delete accounts, and view statistics
• 🔔 Real-Time Notifications: Get alerts for role changes, account suspensions, and security events
• 📊 Dashboard Statistics: View user distribution, role breakdown, and login statistics
• 🎯 Command Autocomplete: Intelligent command completion for faster interaction
• 📤 Audit Export: Export logs to CSV for external analysis
• 🎨 Dynamic Menus: Context-aware interface based on user role and authentication status

🚀 Quick Start (Recommended)

Windows Users:

1. Setup Database: Run setup_db.bat to initialize MySQL with RBAC schema
2. Run Application: Double-click run_all.bat to:
   • Compile both client and server automatically
   • Start the Server in a separate window
   • Launch the Client (login with test accounts below)

Linux/macOS Users:

# Setup database (ensure MySQL is running)
mysql -u root -p < server/schema.sql

# Build project
mvn clean compile

# Terminal 1: Run Server
mvn -f server/pom.xml exec:java -Dexec.mainClass="com.example.server.Server"

# Terminal 2: Run Client
mvn -f client/pom.xml exec:java -Dexec.mainClass="com.example.client.Client"

---

🎮 Key Features

Role-Based Access Control (RBAC)

• ADMIN: Full system access, user management, audit logs, statistics
• MODERATOR: View users and logs, limited management capabilities
• USER: Standard access, manage own account only

Audit & Logging

• Track login/logout events
• Monitor password changes
• Log role assignments and user deletions
• Record permission denials
• Export complete audit trail as CSV

Admin Commands

LIST_USERS              List all users with roles and status
ASSIGN_ROLE <u> <role> Change user role (ADMIN/MODERATOR/USER)
SUSPEND_USER <user>     Disable user account temporarily
DELETE_USER <user>      Permanently remove user
VIEW_AUDIT <limit>      Display recent audit log entries
EXPORT_AUDIT            Export all logs to CSV file
DASHBOARD               View system statistics and metrics
NOTIFICATIONS           Check pending notifications

User Commands

LOGIN <user> <pass>           Authenticate to system
REGISTER <user> <pass>        Create new account
STATUS                        Show session information
CHANGE_PASSWORD <old> <new>   Update password
LOGOUT                        End current session
EXIT                          Close application

---

🔒 Test Accounts

Username	Password	Role	Capabilities
admin	password123	ADMIN	Full system access, user management
moderator1	password123	MODERATOR	View users/logs, limited admin access
user1	mypassword	USER	Standard user, manage own account

---

📋 Technical Requirements

• Java 17+ (Microsoft OpenJDK 17.0.17.10 recommended)
• Maven 3.9.6+ (Must be in PATH)
• MySQL 8.0+ (Running on localhost:3306)
• JDBC Driver: Included in Maven dependencies

Project Structure

client-serveur/
├── client/                    # Client application
│   └── src/main/java/.../    # Client source code
├── server/                    # Server application
│   ├── schema.sql            # Database schema with RBAC
│   └── src/main/java/.../    # Server source code
├── pom.xml                   # Parent Maven configuration
├── run_all.bat               # Windows automation script
├── setup_db.bat              # Database setup script
├── README.md                 # This file
└── FEATURES_V3.md            # Detailed feature documentation

---

🏗 Architecture

Server-Side (Multi-threaded)

• Server.java - Accepts TCP connections on port 5000
• ClientHandler.java - Processes client requests with RBAC validation
• DatabaseConnection.java - MySQL connection pooling
• SecurityUtils.java - SHA-256 password hashing
• Role.java - Role and permission management
• Permission.java - Fine-grained permission definitions
• AuditLogger.java - Asynchronous audit trail logging
• NotificationManager.java - Real-time notification system

Client-Side (Interactive Console)

• Dynamic menu system with role-based options
• Command autocomplete for faster interaction
• Interactive admin panel for privileged users
• Real-time response handling from server
• CSV export functionality for audit logs

Database (MySQL)

• users - User accounts with roles and activity tracking
• roles - Role definitions and descriptions
• audit_logs - Complete operation audit trail (indexed for performance)

---

🔐 Security Features

• SHA-256 Password Hashing: All passwords are one-way hashed
• Permission Validation: Every command checked against user role
• IP Address Logging: All operations tracked with client IP
• Account Status Management: Suspend accounts without deletion
• Audit Trail: Complete history of all operations
• SQL Injection Prevention: PreparedStatements used throughout
• Session Management: Unique UUID for each connection

---

📊 Database Schema

Users Table

id              INT PRIMARY KEY
username        VARCHAR(50) UNIQUE
password        VARCHAR(255) -- SHA-256 hash
role_id         INT FOREIGN KEY to roles
is_active       BOOLEAN -- Account suspension flag
created_at      TIMESTAMP
last_login      TIMESTAMP

Roles Table

id              INT PRIMARY KEY
role_name       VARCHAR(50) UNIQUE
description     VARCHAR(255)
created_at      TIMESTAMP

Audit Logs Table

id              INT PRIMARY KEY
user_id         INT FOREIGN KEY to users
username        VARCHAR(50)
action          VARCHAR(100)
resource        VARCHAR(100)
details         VARCHAR(500)
ip_address      VARCHAR(45)
status          VARCHAR(20)
created_at      TIMESTAMP (indexed)

---

📖 Documentation

For comprehensive feature documentation, examples, troubleshooting, and best practices, see FEATURES_V3.md

---

🚦 Common Operations

Login as Admin

Choice > 1 (or LOGIN)
Username: admin
Password: password123
>>> SUCCESS: Welcome admin [ADMIN]

View All Users

Choice > 8 (or ADMIN)
Admin Choice > 1 (or LIST_USERS)
>>> ID | Username | Role | Active | Created | Last Login

Export Audit Logs

Choice > 8 (or ADMIN)
Admin Choice > 6 (or EXPORT_AUDIT)
>>> [*] Audit logs exported to audit_export_1713698645000.csv

Assign Role to User

Choice > 8 (or ADMIN)
Admin Choice > 2 (or ASSIGN_ROLE)
Username: user1
Role: ADMIN
>>> SUCCESS: Role assigned

---

🐛 Troubleshooting

Issue	Solution
"MySQL not found"	Install MySQL 8.0+ or verify path in setup_db.bat
"Maven not found"	Add Maven to system PATH or verify installation
"Permission denied"	Check your user role permissions with STATUS command
"Cannot delete admin"	Admin account cannot be deleted for security
"Audit logs not showing"	Ensure ADMIN or MODERATOR role

---

📈 Performance

• Connection Pooling: Optimized database connections
• Indexed Queries: Audit logs indexed by timestamp and user
• Async Logging: Non-blocking audit trail writes
• Thread Pool: Efficient multi-client handling
• Memory Management: Proper resource cleanup

---

🔄 Upgrade from v2.5

If upgrading from v2.5:

1. Run setup_db.bat to update database schema
2. Existing users assigned USER role by default
3. Manually promote accounts to ADMIN/MODERATOR as needed
4. Users must login again (old sessions invalidated)

---

📝 License

This project is provided as-is for educational and professional use.

---

🤝 Contributing

For feature requests, bug reports, or improvements:

1. Test thoroughly in your environment
2. Update documentation accordingly
3. Push to GitHub with descriptive commit messages

Repository: https://github.com/Imposter-zx/Java-Client-Server-Application

---

Version: 3.0 | Last Updated: April 2026 | Status: Production Ready ✅