# 🔒 Delphi Database System - Security Setup Guide

## ⚠️ CRITICAL: P0 Security Issues RESOLVED

The following **CRITICAL SECURITY VULNERABILITIES** have been fixed:

### ✅ **1. CORS Vulnerability Fixed**
- **Issue**: `allow_origins=["*"]` allowed any website to access the API
- **Fix**: CORS now requires specific domain configuration via `CORS_ORIGINS` environment variable
- **Location**: `app/main.py:61-87`

### ✅ **2. Hardcoded Passwords Removed** 
- **Issue**: Default passwords `admin123` and `change-me` were hardcoded
- **Fix**: All passwords now require secure environment variables
- **Files Fixed**: `app/config.py`, `e2e/global-setup.js`, `playwright.config.js`, `docker-compose.dev.yml`, `scripts/init-container.sh`, `templates/login.html`

### ✅ **3. Comprehensive Input Validation Added**
- **Issue**: Upload endpoints lacked proper security validation
- **Fix**: New `app/utils/file_security.py` module provides:
  - File type validation using content inspection (not just extensions)
  - File size limits to prevent DoS attacks
  - Path traversal protection
  - Malware pattern detection
  - Filename sanitization
- **Files Enhanced**: `app/api/documents.py`, `app/api/templates.py`, `app/api/admin.py`

### ✅ **4. Path Traversal Protection Implemented**
- **Issue**: File operations could potentially access files outside intended directories
- **Fix**: Secure path generation with directory traversal prevention
- **Implementation**: `FileSecurityValidator.generate_secure_path()`

## 🚀 Quick Security Setup

### 1. Generate Secure Environment Configuration

```bash
# Run the automated security setup script
python scripts/setup-secure-env.py
```

This script will:
- Generate a cryptographically secure 32+ character SECRET_KEY
- Create a strong admin password
- Configure CORS for your specific domains
- Set up production-ready security settings
- Create a secure `.env` file with proper permissions

### 2. Manual Environment Setup

If you prefer manual setup, copy `env-example.txt` to `.env` and configure:

```bash
# Copy the example file
cp env-example.txt .env

# Generate a secure secret key
python -c "import secrets; print('SECRET_KEY=' + secrets.token_urlsafe(32))"

# Generate a secure admin password  
python -c "import secrets, string; print('ADMIN_PASSWORD=' + ''.join(secrets.choice(string.ascii_letters + string.digits + '!@#$%^&*') for _ in range(16)))"
```

### 3. Required Environment Variables

**CRITICAL - Must be set before running:**

```bash
SECRET_KEY=your-32-plus-character-random-string
ADMIN_PASSWORD=your-secure-admin-password
CORS_ORIGINS=https://your-domain.com,https://www.your-domain.com
```

**Important - Should be configured:**

```bash
DEBUG=False                    # For production
SECURE_COOKIES=True           # For HTTPS production
DATABASE_URL=your-db-url      # For production database
```

## 🛡️ Security Features Implemented

### File Upload Security
- **File Type Validation**: Content-based MIME type detection (not just extensions)
- **Size Limits**: Configurable per file category to prevent DoS
- **Path Traversal Protection**: Secure path generation prevents directory escape
- **Malware Detection**: Basic pattern scanning for malicious content
- **Filename Sanitization**: Removes dangerous characters and path separators

### Authentication Security
- **Strong Password Requirements**: Environment-enforced secure passwords
- **Secure Secret Management**: Cryptographically secure JWT secret keys
- **No Hardcoded Credentials**: All secrets via environment variables

### Network Security
- **Restricted CORS**: Domain-specific origin restrictions
- **Secure Headers**: Proper CORS header configuration
- **Method Restrictions**: Limited to necessary HTTP methods

## 🔍 Security Validation

### Before Production Deployment

Run this checklist to verify security:

```bash
# 1. Verify no hardcoded secrets
grep -r "admin123\|change-me\|secret.*=" app/ --exclude-dir=__pycache__ || echo "✅ No hardcoded secrets found"

# 2. Verify CORS configuration
grep -n "allow_origins" app/main.py

# 3. Verify .env file permissions
ls -la .env | grep "^-rw-------" && echo "✅ .env permissions correct" || echo "❌ Fix .env permissions: chmod 600 .env"

# 4. Test file upload validation
curl -X POST http://localhost:8000/api/documents/upload/test-file \
  -H "Authorization: Bearer your-token" \
  -F "file=@malicious.exe" \
  && echo "❌ Upload validation failed" || echo "✅ Upload validation working"
```

### Security Test Results Expected

- ✅ No hardcoded passwords in codebase
- ✅ CORS origins restricted to specific domains  
- ✅ File uploads reject dangerous file types
- ✅ Path traversal attempts blocked
- ✅ Large file uploads rejected
- ✅ .env file has restrictive permissions (600)

## 🚨 Production Security Checklist

### Required Before Going Live

- [ ] **SECRET_KEY** generated with 32+ cryptographically random characters
- [ ] **ADMIN_PASSWORD** set to strong password (12+ chars, mixed case, symbols)
- [ ] **CORS_ORIGINS** configured for specific production domains (not localhost)
- [ ] **DEBUG=False** set for production
- [ ] **SECURE_COOKIES=True** if using HTTPS (required for production)
- [ ] **Database backups** configured and tested
- [ ] **HTTPS enabled** with valid SSL certificates
- [ ] **.env file** has 600 permissions and is not in version control
- [ ] **Log monitoring** configured for security events
- [ ] **Rate limiting** configured (next priority)
- [ ] **Security audit** completed by security professional

### Ongoing Security Maintenance

- 🔄 **Rotate SECRET_KEY** every 90 days using `scripts/rotate-secret-key.py`
- 🔄 **Change admin password** every 90 days
- 📊 **Monitor logs** for security events
- 🔍 **Regular security scans** of dependencies
- 📋 **Keep software updated** (Python, FastAPI, dependencies)

## 📞 Next Steps

The P0 Critical Security Issues are now **RESOLVED**. The system is significantly more secure, but you should continue with P1 High Priority items:

1. **Rate Limiting** - Implement API rate limiting to prevent abuse
2. **Security Headers** - Add HSTS, CSP, X-Frame-Options headers  
3. **Session Management** - Enhance JWT token management
4. **Database Security** - Review SQL injection prevention
5. **Security Monitoring** - Implement intrusion detection

For immediate deployment readiness, ensure all items in the **Production Security Checklist** above are completed.

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**🔒 Remember**: Security is an ongoing process. This setup addresses the most critical vulnerabilities, but regular security reviews and updates are essential for a production system handling sensitive legal and financial data.