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# Shared Modules

This folder contains modules used by both main and renderer processes.

## Files

### security-core.js
Enterprise-grade security system with comprehensive protection.

## Features

### 1. Input Validation
- Path traversal detection
- Malicious pattern checking
- Length validation

### 2. Path Safety
- Forbidden directory protection (Windows, System, etc.)
- Whitelist validation
- Workspace folder support

### 3. Symlink Protection
- Symlink detection
- Circular reference prevention
- Depth limiting

### 4. File Validation
- Extension whitelist
- Size limits (min/max)
- Content verification

### 5. Integrity Verification
- SHA-256 hash calculation
- File tampering detection
- Cache management

### 6. Rate Limiting
- Operation throttling
- Time-window based limits
- Abuse prevention

### 7. ReDoS Protection
- Regex timeout enforcement
- Pattern execution monitoring
- Safe regex execution

## Usage

```javascript

import { SecurityManager } from './security-core.js';



const security = new SecurityManager({

  MAX_FILE_SIZE: 10 * 1024 * 1024,

  ALLOWED_EXTENSIONS: ['.js', '.ts', '.py'],

  EXTRA_ALLOWED_DIRS: ['/path/to/allowed/dir']

});



// Validate and read file

const result = await security.secureReadFile(filePath);



// Get statistics

const stats = security.getSecurityStats();



// Export audit log

const log = security.exportSecurityLog();

```

## Custom Error Classes

- `SecurityError` - Base security error
- `PathTraversalError` - Path attack detected
- `SymlinkError` - Symlink violation
- `FileValidationError` - File validation failed
- `ReDoSError` - Regex timeout
- `RateLimitError` - Rate limit exceeded

## Configuration

All security settings are configurable:

```javascript

const SECURITY_CONFIG = {

  MAX_PATH_LENGTH: 260,

  MAX_FILE_SIZE: 10 * 1024 * 1024,

  ALLOWED_EXTENSIONS: [...],

  FORBIDDEN_PATHS: [...],

  MAX_OPERATIONS_PER_MINUTE: 500,

  // ... more settings

};

```

## Adding New Validations

1. Create validation method in SecurityManager class
2. Add to validateFile() pipeline
3. Add custom error class if needed
4. Update configuration