SkyArtShop/docs/SECURITY_IMPLEMENTATION.md

SkyArtShop - Security & Production Implementation Complete

Tech Stack

• Backend: Node.js v18+ with Express.js
• Database: PostgreSQL 14+
• Session Store: connect-pg-simple (PostgreSQL-backed sessions)
• Frontend: HTML5, CSS3, JavaScript (ES6+), Bootstrap 5
• Process Manager: PM2
• Web Server: Nginx (reverse proxy)
• OS: Linux (Ubuntu/Debian)

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Security Improvements Implemented

1. ✅ Environment Configuration (.env)

• Removed hardcoded credentials from ecosystem.config.js
• Created .env file for sensitive configuration
• Added .env.example template for deployment

Files Modified:

• Created: .env, .env.example
• Modified: ecosystem.config.js

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2. ✅ Logging System (Winston)

• Replaced all console.log/console.error with structured logging
• Implemented log rotation (10MB max, 5 files)
• Separate error and combined logs
• Console output for development environment

Files Created:

• backend/config/logger.js

Files Modified:

• All route files: auth.js, admin.js, public.js, users.js, upload.js
• Middleware: auth.js
• Config: database.js

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3. ✅ Rate Limiting

• API rate limiter: 100 requests per 15 minutes
• Auth rate limiter: 5 login attempts per 15 minutes
• Upload rate limiter: 50 uploads per hour

Files Created:

• backend/config/rateLimiter.js

Applied to:

• All /api/* routes
• Login/logout endpoints
• File upload endpoint

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4. ✅ Input Validation & Sanitization

• Implemented express-validator for all inputs
• SQL injection protection via parameterized queries
• XSS protection via input escaping
• Email normalization
• Strong password requirements (8+ chars, uppercase, lowercase, number)

Files Created:

• backend/middleware/validators.js

Validators Added:

• Login validation
• User creation/update validation
• Product CRUD validation
• Blog post validation
• Pagination validation

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5. ✅ Security Headers (Helmet.js)

• Content Security Policy (CSP)
• HTTP Strict Transport Security (HSTS)
• X-Frame-Options
• X-Content-Type-Options
• X-XSS-Protection

Configuration:

• Modified: backend/server.js

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6. ✅ Error Handling

• Centralized error handler
• Production vs development error responses
• PostgreSQL error translation
• Async error wrapper
• Custom AppError class

Files Created:

• backend/middleware/errorHandler.js

Features:

• Hide sensitive error details in production
• Log all errors with context
• Standardized error responses
• 404 handler

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7. ✅ Database Transaction Support

• Transaction helper function
• Rollback on error
• Connection pooling (max 20 connections)

Files Modified:

• backend/config/database.js

Added:

• transaction() helper function
• healthCheck() function

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8. ✅ File Upload Security

• MIME type validation
• File extension whitelist
• File size limits (5MB default)
• Filename sanitization
• Upload rate limiting
• Automatic cleanup on errors

Files Modified:

• backend/routes/upload.js

Security Features:

• Only allow image types (jpeg, png, gif, webp)
• Limit filename length to 50 characters
• Generate unique filenames
• Log all upload attempts
• Clean up failed uploads

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9. ✅ Health Check Endpoint

• Real database connectivity test
• Memory usage monitoring
• Uptime tracking
• Graceful degradation

Endpoint:

• GET /health

Returns:

• Database connection status
• Server uptime
• Memory usage
• Timestamp

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10. ✅ Graceful Shutdown

• Proper SIGTERM/SIGINT handling
• Close HTTP connections gracefully
• Close database pool
• 10-second forced shutdown timeout

Files Modified:

• backend/server.js

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Security Best Practices Applied

Authentication & Authorization

• ✅ Bcrypt password hashing (rounds: 12)
• ✅ Session-based authentication
• ✅ HttpOnly secure cookies (production)
• ✅ Role-based access control (RBAC)
• ✅ Session expiry (24 hours)
• ✅ Last login tracking

Input Validation

• ✅ All user inputs validated
• ✅ SQL injection prevention (parameterized queries)
• ✅ XSS prevention (input escaping)
• ✅ Email validation and normalization
• ✅ Strong password requirements

API Security

• ✅ Rate limiting on all endpoints
• ✅ CORS configuration ready
• ✅ Trust proxy for nginx reverse proxy
• ✅ Request logging with IP tracking

File Security

• ✅ File type validation
• ✅ File size limits
• ✅ Filename sanitization
• ✅ Unique filename generation
• ✅ Upload rate limiting

Error Handling

• ✅ No sensitive data in error messages
• ✅ All errors logged with context
• ✅ Production vs development error responses
• ✅ PostgreSQL error translation

Logging & Monitoring

• ✅ Structured logging (Winston)
• ✅ Log rotation
• ✅ Separate error logs
• ✅ Request logging
• ✅ Security event logging (failed logins, etc.)

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Required Environment Variables

Create .env file in project root:

NODE_ENV=production
PORT=5000
HOST=0.0.0.0

DB_HOST=localhost
DB_PORT=5432
DB_NAME=skyartshop
DB_USER=skyartapp
DB_PASSWORD=your_secure_password_here

SESSION_SECRET=generate_a_random_string_at_least_32_characters_long

UPLOAD_DIR=/var/www/skyartshop/uploads
MAX_FILE_SIZE=5242880
ALLOWED_FILE_TYPES=image/jpeg,image/png,image/gif,image/webp

RATE_LIMIT_WINDOW_MS=900000
RATE_LIMIT_MAX_REQUESTS=100
BCRYPT_ROUNDS=12

LOG_LEVEL=info
LOG_FILE=logs/app.log
LOG_MAX_SIZE=10m
LOG_MAX_FILES=7d

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Deployment Checklist

Before Production

• Generate strong SESSION_SECRET (32+ characters)
• Change all default passwords
• Set NODE_ENV=production
• Configure CORS_ORIGIN if needed
• Review and adjust rate limits
• Set up SSL/TLS certificates
• Configure nginx reverse proxy
• Set up firewall rules
• Enable log rotation
• Set up monitoring/alerts
• Backup database regularly
• Test all security features

Nginx Configuration

server {
    listen 80;
    server_name yourdomain.com;
    return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl http2;
    server_name yourdomain.com;

    ssl_certificate /path/to/cert.pem;
    ssl_certificate_key /path/to/key.pem;

    location / {
        proxy_pass http://localhost:5000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_cache_bypass $http_upgrade;
    }
}

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Testing Commands

# Test server startup
npm start

# Check logs
tail -f backend/logs/combined.log
tail -f backend/logs/error.log

# Test health endpoint
curl http://localhost:5000/health

# Test rate limiting
for i in {1..10}; do curl http://localhost:5000/api/products; done

# Check for security vulnerabilities
npm audit

# Fix vulnerabilities
npm audit fix

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Known Issues & Recommendations

Fixed Issues

1. ✅ Hardcoded credentials - Moved to .env
2. ✅ No input validation - Added express-validator
3. ✅ No rate limiting - Implemented multi-tier rate limiting
4. ✅ Console logging - Replaced with Winston
5. ✅ Poor error handling - Centralized error handler
6. ✅ No security headers - Added Helmet.js
7. ✅ Weak file upload security - Enhanced validation
8. ✅ No graceful shutdown - Implemented proper shutdown

Recommendations for Future

1. CSRF Protection: Consider adding CSRF tokens for state-changing operations
2. API Documentation: Add Swagger/OpenAPI documentation
3. Unit Tests: Implement Jest/Mocha test suite
4. Integration Tests: Add supertest for API testing
5. Database Migrations: Use a migration tool (e.g., node-pg-migrate)
6. Redis Session Store: For better performance in production
7. Caching: Implement Redis caching for frequently accessed data
8. Image Optimization: Add sharp for image resizing/optimization
9. Content Delivery: Consider CDN for static assets
10. Monitoring: Add APM (Application Performance Monitoring)

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Database Tables Required

Ensure these tables exist in PostgreSQL:

• adminusers - Admin user accounts
• roles - User roles and permissions
• products - Product catalog
• portfolioprojects - Portfolio items
• blogposts - Blog articles
• pages - Static pages
• uploads - File upload tracking
• session - Session storage (auto-created)
• sitesettings - Site configuration
• homepagesections - Homepage content

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Support & Maintenance

Log Files Location

• backend/logs/combined.log - All logs
• backend/logs/error.log - Error logs only
• /var/log/skyartshop/pm2-*.log - PM2 process logs

Common Commands

# Start server
npm start

# Development mode with auto-restart
npm run dev

# Check PM2 status
pm2 status skyartshop

# Restart PM2
pm2 restart skyartshop

# View PM2 logs
pm2 logs skyartshop

# Stop server
pm2 stop skyartshop

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Security Contacts

For security issues, please review logs at:

• backend/logs/error.log
• PM2 logs via pm2 logs

Monitor for:

• Failed login attempts
• Rate limit violations
• File upload rejections
• Database errors
• Unhandled exceptions

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Last Updated: December 18, 2025 Version: 2.0.0 (Production Ready)