feat: Add comprehensive documentation suite and reorganize project structure
- Created complete documentation in docs/ directory - Added PROJECT_OVERVIEW.md with feature highlights and getting started guide - Added ARCHITECTURE.md with system design and technical details - Added SECURITY.md with comprehensive security implementation guide - Added DEVELOPMENT.md with development workflows and best practices - Added DEPLOYMENT.md with production deployment instructions - Added API.md with complete REST API documentation - Added CONTRIBUTING.md with contribution guidelines - Added CHANGELOG.md with version history and migration notes - Reorganized all documentation files into docs/ directory for better organization - Updated README.md with proper documentation links and quick navigation - Enhanced project structure with professional documentation standards
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# Security Guide
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EasyStream implements comprehensive security measures to protect against common web application vulnerabilities and ensure data integrity.
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## Security Framework Overview
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### Core Security Classes
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- `VSecurity` - Input validation and sanitization
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- `VAuth` - Authentication management
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- `VRBAC` - Role-based access control
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- `VIPTracker` - IP monitoring and blocking
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- `VFingerprint` - Browser fingerprinting
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- `VLogger` - Security event logging
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## Input Validation and Sanitization
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### Safe Input Handling
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Always use the security wrapper functions for user input:
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```php
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// GET parameters
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$id = get_param('id', 'int');
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$email = get_param('email', 'email');
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$filename = get_param('file', 'filename');
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// POST parameters
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$username = post_param('username', 'alphanum');
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$content = post_param('content', 'text');
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$url = post_param('url', 'url');
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```
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### Validation Types
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- `int` - Integer values only
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- `email` - Valid email addresses
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- `url` - Valid URLs
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- `alpha` - Alphabetic characters only
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- `alphanum` - Alphanumeric characters
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- `slug` - URL-safe slugs
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- `filename` - Safe filenames
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- `boolean` - Boolean values
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- `text` - General text with XSS protection
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### Custom Validation
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```php
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$input = VSecurity::validateInput($value, [
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'type' => 'custom',
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'pattern' => '/^[A-Z0-9]{6,12}$/',
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'min_length' => 6,
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'max_length' => 12
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]);
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```
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## Output Escaping
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### HTML Context
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```php
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echo secure_output($user_content);
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```
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### JavaScript Context
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```php
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echo '<script>var data = ' . secure_js($data) . ';</script>';
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```
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### URL Context
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```php
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echo '<a href="' . secure_url($url) . '">Link</a>';
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```
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## CSRF Protection
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### Form Protection
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```php
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// In templates
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{csrf_field('form_action')}
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// In PHP
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echo csrf_field('form_action');
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```
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### Validation
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```php
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if (!validate_csrf('form_action')) {
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throw new SecurityException('CSRF token validation failed');
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}
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```
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## Authentication System
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### Password Security
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- Minimum 8 characters
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- Bcrypt/Argon2 hashing
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- Salt generation
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- Password strength validation
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```php
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// Password hashing
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$hash = VAuth::hashPassword($password);
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// Password verification
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if (VAuth::verifyPassword($password, $hash)) {
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// Login successful
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}
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```
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### Session Management
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- Secure session configuration
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- Session regeneration on login
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- Automatic session timeout
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- Session hijacking protection
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```php
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// Start secure session
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VAuth::startSecureSession();
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// Regenerate session ID
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VAuth::regenerateSession();
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// Destroy session
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VAuth::destroySession();
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```
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### Multi-Factor Authentication
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```php
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// Generate TOTP secret
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$secret = VAuth::generateTOTPSecret();
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// Verify TOTP code
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if (VAuth::verifyTOTP($code, $secret)) {
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// MFA successful
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}
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```
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## Authorization (RBAC)
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### Role Management
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```php
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// Check user role
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if (VRBAC::hasRole($userId, 'admin')) {
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// Admin access
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}
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// Check specific permission
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if (VRBAC::hasPermission($userId, 'video.delete')) {
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// Can delete videos
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}
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```
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### Resource-Level Permissions
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```php
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// Check resource access
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if (VRBAC::canAccess($userId, 'video', $videoId, 'edit')) {
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// Can edit this specific video
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}
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```
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## Rate Limiting
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### Implementation
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```php
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// Check rate limit
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if (!check_rate_limit('login_' . $ip, 5, 300)) {
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throw new SecurityException('Too many login attempts');
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}
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// Custom rate limiting
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if (!VSecurity::checkRateLimit($key, $maxAttempts, $windowSeconds)) {
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// Rate limit exceeded
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}
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```
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### Common Rate Limits
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- Login attempts: 5 per 5 minutes
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- API requests: 100 per hour
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- File uploads: 10 per hour
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- Password resets: 3 per hour
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## File Upload Security
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### Validation
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```php
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$result = validate_file_upload($_FILES['upload'], [
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'allowed_types' => ['image/jpeg', 'image/png', 'video/mp4'],
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'max_size' => 100 * 1024 * 1024, // 100MB
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'scan_content' => true
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]);
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if (!$result['valid']) {
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throw new SecurityException($result['error']);
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}
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```
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### Security Measures
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- MIME type validation
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- File extension checking
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- Content scanning
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- Size limitations
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- Virus scanning (if available)
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- Secure file storage
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## IP Tracking and Blocking
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### Automatic Monitoring
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```php
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// Log user activity
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VIPTracker::logActivity($ip, 'login_attempt', [
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'user_id' => $userId,
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'success' => $success
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]);
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// Check if IP is banned
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if (VIPTracker::isBanned($ip)) {
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throw new SecurityException('IP address is banned');
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}
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```
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### Manual IP Management
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```php
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// Ban IP address
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VIPTracker::banIP($ip, 'Suspicious activity', 3600); // 1 hour
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// Unban IP address
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VIPTracker::unbanIP($ip);
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```
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## Browser Fingerprinting
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### Fingerprint Generation
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```php
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// Generate fingerprint
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$fingerprint = VFingerprint::generateFingerprint($_SERVER, $_POST);
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// Track fingerprint
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VFingerprint::trackFingerprint($fingerprint, $userId);
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```
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### Threat Detection
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```php
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// Check for suspicious fingerprints
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if (VFingerprint::isBanned($fingerprint)) {
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// Handle banned fingerprint
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}
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// Detect fingerprint anomalies
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$risk = VFingerprint::calculateRiskScore($fingerprint);
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if ($risk > 0.8) {
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// High risk - additional verification required
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}
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```
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## Security Headers
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### HTTP Security Headers
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```php
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// Set in Caddy configuration or PHP
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header('X-Content-Type-Options: nosniff');
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header('X-Frame-Options: DENY');
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header('X-XSS-Protection: 1; mode=block');
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header('Strict-Transport-Security: max-age=31536000; includeSubDomains');
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header('Content-Security-Policy: default-src \'self\'');
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```
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## Database Security
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### Query Protection
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```php
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// Always use prepared statements
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$result = $db->execute("SELECT * FROM users WHERE id = ?", [$userId]);
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// Validate table/field names
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$table = VDatabase::validateTableName($table);
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$field = VDatabase::validateFieldName($field);
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```
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### Connection Security
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- Use dedicated database user with minimal privileges
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- Enable SSL/TLS for database connections
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- Regular password rotation
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- Connection pooling with limits
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## Logging and Monitoring
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### Security Event Logging
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```php
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// Log security events
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VLogger::security('Failed login attempt', [
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'ip' => $ip,
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'username' => $username,
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'user_agent' => $_SERVER['HTTP_USER_AGENT']
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]);
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// Log admin actions
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VLogger::admin('User deleted', [
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'admin_id' => $adminId,
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'target_user_id' => $userId
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]);
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```
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### Log Analysis
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- Monitor failed login attempts
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- Track privilege escalation attempts
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- Detect unusual access patterns
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- Alert on security threshold breaches
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## Vulnerability Prevention
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### SQL Injection
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- Use prepared statements exclusively
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- Validate all input parameters
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- Escape dynamic table/field names
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- Limit database user privileges
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### XSS Prevention
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- Escape all output by default
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- Use Content Security Policy
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- Validate and sanitize rich text input
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- Implement proper encoding for different contexts
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### CSRF Protection
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- Use anti-CSRF tokens for all forms
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- Validate tokens on server side
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- Implement SameSite cookie attributes
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- Use double-submit cookie pattern for AJAX
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### Directory Traversal
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- Validate file paths
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- Use whitelisted directories
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- Implement proper access controls
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- Sanitize filename inputs
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## Security Testing
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### Automated Testing
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```bash
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# Run security tests
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./run-tests.sh --filter=Security
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# Run specific security test
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phpunit tests/Security/AuthSecurityTest.php
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```
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### Manual Testing Checklist
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- [ ] Input validation on all forms
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- [ ] CSRF protection on state-changing operations
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- [ ] Authentication bypass attempts
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- [ ] Authorization escalation tests
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- [ ] File upload security validation
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- [ ] SQL injection testing
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- [ ] XSS payload testing
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## Incident Response
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### Security Incident Handling
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1. **Detection** - Monitor logs and alerts
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2. **Analysis** - Investigate the incident
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3. **Containment** - Limit damage and exposure
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4. **Eradication** - Remove the threat
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5. **Recovery** - Restore normal operations
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6. **Lessons Learned** - Improve security measures
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### Emergency Procedures
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```php
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// Emergency IP ban
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VIPTracker::emergencyBan($ip, 'Security incident');
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// Disable user account
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VAuth::disableUser($userId, 'Security breach');
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// Clear all sessions
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VAuth::clearAllSessions();
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```
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## Security Configuration
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### Environment Variables
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```bash
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# Security settings
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SECURITY_LEVEL=high
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CSRF_PROTECTION=enabled
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RATE_LIMITING=enabled
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IP_TRACKING=enabled
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FINGERPRINTING=enabled
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# Session security
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SESSION_SECURE=true
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SESSION_HTTPONLY=true
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SESSION_SAMESITE=strict
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```
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### Database Configuration
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```sql
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-- Create security-focused database user
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CREATE USER 'easystream_app'@'%' IDENTIFIED BY 'strong_password';
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GRANT SELECT, INSERT, UPDATE, DELETE ON easystream.* TO 'easystream_app'@'%';
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FLUSH PRIVILEGES;
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```
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## Compliance and Standards
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### Security Standards
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- OWASP Top 10 compliance
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- PCI DSS requirements (if handling payments)
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- GDPR data protection requirements
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- SOC 2 Type II controls
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### Regular Security Tasks
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- [ ] Security dependency updates
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- [ ] Vulnerability scanning
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- [ ] Penetration testing
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- [ ] Security code reviews
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- [ ] Access control audits
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- [ ] Log analysis and monitoring
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## Security Resources
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### Documentation
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- [OWASP Security Guide](https://owasp.org/)
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- [PHP Security Best Practices](https://www.php.net/manual/en/security.php)
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- [Web Application Security Testing](https://owasp.org/www-project-web-security-testing-guide/)
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### Tools
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- Static analysis: PHPStan, Psalm
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- Dependency scanning: Composer audit
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- Vulnerability scanning: OWASP ZAP
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- Code review: SonarQube
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