shield-firewall/README.md

AI-Powered Client-Side Web Application Firewall - Zero-Knowledge, Predictive Security Protection

# SHIELD.js - Revolutionary AI-Powered Client-Side Web Application Firewall

[![Version](https://img.shields.io/badge/version-1.0.0-blue.svg)](https://github.com/your-org/shield-js)
[![License](https://img.shields.io/badge/license-MIT-green.svg)](LICENSE)
[![Build Status](https://img.shields.io/badge/build-passing-brightgreen.svg)]()
[![Coverage](https://img.shields.io/badge/coverage-85%25-yellow.svg)]()

> **SHIELD.js** is a revolutionary, first-of-its-kind AI-powered client-side web application firewall that provides enterprise-grade protection against advanced cyber threats including XSS, SQL injection, CSRF, crypto mining, and zero-day attacks.

## Key Features

### AI-Powered Protection
- **Behavioral Analysis**: Machine learning algorithms analyze user behavior patterns to detect anomalies and bot activity
- **Predictive Threat Detection**: Uses advanced heuristics and pattern recognition to identify emerging threats
- **Adaptive Learning**: Continuously learns from attack patterns to improve detection accuracy

### Comprehensive Security
- **XSS Prevention**: Real-time DOM monitoring and script injection blocking
- **SQL Injection Defense**: Advanced pattern matching and input sanitization
- **CSRF Protection**: Request origin validation and token verification
- **Crypto Mining Detection**: Identifies and blocks unauthorized mining scripts
- **Network Interception**: Monitors and analyzes all outgoing requests

### Privacy-First Architecture
- **Zero-Knowledge Design**: All processing happens client-side with no data transmission
- **Encrypted Storage**: Local data is encrypted using AES-GCM encryption
- **No Telemetry**: No tracking or data collection (configurable)

### Performance Optimized
- **Web Workers**: ML computations run off-main-thread for optimal performance
- **Efficient Storage**: IndexedDB with automatic cleanup and compression
- **Minimal Footprint**: ~50KB gzipped with tree-shaking support

### Advanced Management
- **Visual Dashboard**: Real-time threat monitoring with drag-and-drop interface
- **Configuration System**: Multiple protection levels (Basic, Balanced, Strict, Paranoid)
- **Auto-Recovery**: Automatic DOM restoration and threat quarantine
- **Comprehensive Logging**: Detailed threat logs with statistics and analytics

## Quick Start

### Installation

```bash
npm install shield-js
```

### Basic Usage

```javascript
import ShieldFirewall from 'shield-js';

// Initialize with default settings
const shield = new ShieldFirewall();
await shield.initialize();
await shield.start();

// Your application code here
console.log('SHIELD.js is now protecting your application!');
```

### Advanced Configuration

```javascript
import ShieldFirewall from 'shield-js';

const shield = new ShieldFirewall();

// Configure protection settings
await shield.configure({
  protectionLevel: 'strict',
  features: {
    domProtection: true,
    networkInterception: true,
    behaviorAnalysis: true,
    predictiveDetection: true
  },
  threatDetection: {
    sensitivity: 0.8,
    blockUnknown: true
  },
  privacy: {
    anonymizeLogs: true,
    dataRetention: 30 // days
  }
});

await shield.initialize();
await shield.start();
```

## API Reference

### ShieldFirewall Class

#### Constructor
```javascript
const shield = new ShieldFirewall(options?: ShieldOptions);
```

#### Methods

##### `initialize(): Promise<boolean>`
Initializes the firewall with stored configuration and sets up all protection components.

##### `start(): Promise<boolean>`
Starts active protection monitoring.

##### `stop(): Promise<boolean>`
Stops protection monitoring while maintaining configuration.

##### `configure(config: Partial<ShieldConfig>): Promise<boolean>`
Updates firewall configuration.

##### `getStatus(): ShieldStatus`
Returns current firewall status and statistics.

##### `scan(element?: HTMLElement): Promise<ScanResult>`
Performs a manual security scan of the specified element or entire document.

##### `createSnapshot(name: string): string`
Creates a DOM snapshot for recovery purposes.

##### `restoreFromSnapshot(snapshotId: string): Promise<boolean>`
Restores DOM from a previously created snapshot.

##### `getConfig(): ShieldConfig`
Returns current configuration.

##### `reset(): Promise<boolean>`
Resets firewall to default state and clears all data.

### Configuration Options

```typescript
interface ShieldConfig {
  protectionLevel: 'basic' | 'balanced' | 'strict' | 'paranoid';
  features: {
    domProtection: boolean;
    networkInterception: boolean;
    behaviorAnalysis: boolean;
    predictiveDetection: boolean;
    autoRecovery: boolean;
  };
  threatDetection: {
    sensitivity: number; // 0.0 - 1.0
    blockUnknown: boolean;
    customPatterns: string[];
  };
  privacy: {
    anonymizeLogs: boolean;
    telemetry: boolean;
    dataRetention: number; // days
  };
  ui: {
    showDashboard: boolean;
    dashboardPosition: 'top-left' | 'top-right' | 'bottom-left' | 'bottom-right';
    theme: 'light' | 'dark' | 'auto';
  };
}
```

## Testing

SHIELD.js includes a comprehensive test suite with attack simulations:

```bash
# Run all tests
npm test

# Run tests with coverage
npm run test:coverage

# Run specific test file
npm test -- crypto.test.js

# Run tests in watch mode
npm run test:watch
```

### Attack Simulations

The test suite includes simulations for:
- XSS injection attempts
- SQL injection attacks
- CSRF exploits
- Crypto mining scripts
- Phishing attempts
- Command injection
- Path traversal attacks
- Bot behavior patterns

## Build and Development

### Prerequisites
- Node.js 16+
- npm or yarn

### Development Setup

```bash
# Clone the repository
git clone https://github.com/your-org/shield-js.git
cd shield-js

# Install dependencies
npm install

# Start development server
npm run dev

# Build for production
npm run build

# Run linting
npm run lint

# Generate documentation
npm run docs
```

### Build Scripts

- `npm run build` - Production build with minification
- `npm run build:dev` - Development build with source maps
- `npm run build:analyze` - Bundle analysis
- `npm run clean` - Clean build artifacts

## Performance Benchmarks

SHIELD.js is optimized for performance:

| Metric | Value | Notes |
|--------|-------|-------|
| Initial Load | ~50KB gzipped | Tree-shakeable |
| Memory Usage | < 10MB | With full feature set |
| CPU Overhead | < 5% | Average across operations |
| Threat Detection | < 10ms | Per request analysis |
| DOM Monitoring | < 1ms | Per mutation |
| ML Analysis | < 50ms | Behavioral analysis |

## Security Features

### Threat Detection Engine
- **Pattern Matching**: 200+ predefined threat patterns
- **Behavioral Analysis**: ML-powered anomaly detection
- **Signature Verification**: Cryptographic request validation
- **Rate Limiting**: DDoS and brute force protection

### Privacy & Compliance
- **GDPR Compliant**: No personal data collection
- **Zero Telemetry**: No tracking or analytics
- **Local Storage Only**: All data stays client-side
- **Encrypted Data**: AES-GCM encryption for stored data

### Auto-Recovery System
- **DOM Snapshots**: Automatic state preservation
- **Quarantine Zones**: Isolated threat containment
- **Rollback Capability**: One-click recovery
- **Integrity Checks**: Content validation

## Dashboard Features

The visual dashboard provides:

- **Real-time Statistics**: Threats blocked, requests monitored
- **Threat Timeline**: Chronological attack visualization
- **Configuration Panel**: Live protection settings
- **Log Viewer**: Detailed threat analysis
- **Performance Metrics**: System resource usage
- **Export Capabilities**: Data export for analysis

## Browser Support

- Chrome 80+
- Firefox 75+
- Safari 13+
- Edge 80+

## Examples

### E-commerce Protection
```javascript
// Protect checkout forms
const shield = new ShieldFirewall();
await shield.initialize();

shield.configure({
  protectionLevel: 'strict',
  features: {
    domProtection: true,
    networkInterception: true,
    behaviorAnalysis: true
  }
});

// Monitor checkout form
const checkoutForm = document.getElementById('checkout');
shield.scan(checkoutForm);
```

### API Security
```javascript
// Protect API communications
const shield = new ShieldFirewall();

await shield.configure({
  features: {
    networkInterception: true,
    predictiveDetection: true
  },
  threatDetection: {
    sensitivity: 0.9,
    customPatterns: ['api.*token', 'auth.*secret']
  }
});
```

### Gaming Anti-Cheat
```javascript
// Prevent game manipulation
const shield = new ShieldFirewall();

await shield.configure({
  protectionLevel: 'paranoid',
  features: {
    behaviorAnalysis: true,
    domProtection: true
  },
  threatDetection: {
    blockUnknown: true
  }
});
```

## 🤝 Contributing

We welcome contributions! Please see our [Contributing Guide](CONTRIBUTING.md) for details.

### Development Workflow
1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests for new functionality
5. Ensure all tests pass
6. Submit a pull request

### Repository Structure

```
shield-js/
├── .github/                    # GitHub configuration
│   ├── ISSUE_TEMPLATE/        # Issue templates
│   │   ├── bug-report.md
│   │   ├── feature-request.md
│   │   └── security-report.md
│   └── workflows/             # CI/CD workflows
│       └── ci.yml
├── docs/                      # Documentation
│   └── README.md             # API documentation
├── examples/                  # Usage examples
│   ├── basic-example.html
│   ├── advanced-config.html
│   └── framework-integration.html
├── src/                       # Source code
├── test/                      # Test files
│   └── attack-simulations.html
├── dist/                      # Built distribution files
├── scripts/                   # Build scripts
├── .gitignore                # Git ignore rules
├── CODE_OF_CONDUCT.md        # Community guidelines
├── CONTRIBUTING.md           # Contribution guidelines
├── LICENSE                   # MIT license
├── README.md                 # This file
├── SECURITY.md               # Security policy
└── package.json              # NPM configuration
```

## License

MIT License - see [LICENSE](LICENSE) file for details.

## Disclaimer

SHIELD.js provides client-side protection but should be used as part of a comprehensive security strategy. Server-side validation and security measures are still essential for complete protection.

## Support

- **Documentation**: [docs.shield-js.com](https://docs.shield-js.com)
- **Issues**: [GitHub Issues](https://github.com/your-org/shield-js/issues)
- **Discussions**: [GitHub Discussions](https://github.com/your-org/shield-js/discussions)
- **Email**: support@shield-js.com

---

**SHIELD.js** - Protecting the web, one client at a time.