# Security Updates - Role-Based Access Control

This document summarizes the changes made to implement role-based access control in the StoreWeb e-commerce platform.

## Database Changes

### Updated `storeweb.sql`

Added a `role` column to the `users` table:
```sql
`role` enum('user','admin') NOT NULL DEFAULT 'user'
```

## Authentication & Session Management

### Updated `auth/login.php`

- Replaced the old `$_SESSION['is_admin']` approach with proper role handling
- Now stores `$_SESSION['role']` from the database value

### Updated `auth/register.php`

- Ensures all new registrations get the 'user' role by default
- Stores `$_SESSION['role']` during registration

## Authorization Functions

### Updated `includes/functions.php`

Added new functions:
- `isAdmin()` - Checks if the current user is an admin
- `requireAdmin()` - Middleware function to protect admin-only pages

### New `includes/require_admin.php`

Created a dedicated middleware file that can be included at the top of any admin-only page:
```php
<?php
require_once 'functions.php';
requireAdmin();
?>
```

## UI & Navigation Updates

### Updated `includes/header.php`

- Replaced the old `$_SESSION['is_admin']` check with the new `isAdmin()` function
- Conditionally displays the "Admin Panel" link only for admin users

### Updated Admin Pages

All admin pages now use the new `require_admin.php` middleware:
- `admin/index.php`
- `admin/products.php`
- `admin/add_product.php`
- `admin/edit_product.php`

### New Admin Pages

Created new admin functionality:
- `admin/manage_users.php` - User management with promote/delete capabilities
- `admin/orders.php` - Order management page

## Admin User Creation

### New `create_admin.php`

A one-time script to create the first admin user:
- Secure form for creating admin accounts
- Password hashing using `password_hash()`
- Security warning to delete the file after use

## Summary of Key Security Improvements

1. **Server-Side Authorization**: All permission checks are performed server-side, never relying on frontend-only checks
2. **Proper Session Management**: User roles are stored securely in sessions and validated on each request
3. **Consistent Protection**: Created reusable middleware for consistent admin access control
4. **Principle of Least Privilege**: Regular users cannot access admin functions by default
5. **Secure Defaults**: New registrations automatically receive the 'user' role
6. **Prepared Statements**: All database queries continue to use PDO prepared statements
7. **Clear Separation**: Admin functionality is completely separated from regular user functionality

## Implementation Notes

To implement this system:

1. Update your database schema to add the `role` column to the `users` table
2. Use the `create_admin.php` script to create your first admin user
3. Delete `create_admin.php` for security
4. All admin pages now automatically check for proper authorization
5. The navigation menu dynamically shows/hides the "Admin Panel" link based on user role

## Files Modified

- `storeweb.sql` - Database schema
- `auth/login.php` - Login logic
- `auth/register.php` - Registration logic
- `includes/functions.php` - Added authorization functions
- `includes/header.php` - Updated navigation
- `includes/require_admin.php` - New middleware file
- `admin/index.php` - Updated navigation and protection
- `admin/products.php` - Updated navigation and protection
- `admin/manage_users.php` - New user management page
- `admin/orders.php` - New order management page
- `README.md` - Documentation updates
- `SECURITY_UPDATES.md` - This file

## Files Added

- `includes/require_admin.php` - Admin middleware
- `admin/manage_users.php` - User management
- `admin/orders.php` - Order management
- `create_admin.php` - Admin user creation script
- `SECURITY_UPDATES.md` - This file