# Django Security Suite

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Enterprise-grade security suite for Django applications providing comprehensive protection against OWASP Top 10 vulnerabilities with ISO 27001 compliance features.

## 🔒 Features

### Core Security
- **🛡️ Security Headers**: Automatic CSP, HSTS, X-Frame-Options configuration
- **⚡ Rate Limiting**: Redis-backed rate limiting with sliding window algorithm
- **🔍 Suspicious Pattern Detection**: Real-time detection of SQL injection, XSS, and path traversal attempts
- **📏 Request Size Limiting**: DoS protection through request size enforcement

### Authentication & Session Security
- **🔐 Brute Force Protection**: Account lockout with exponential backoff
- **⏰ Session Security**: Absolute timeout, inactivity timeout, IP binding
- **🔑 Password Validators**: HIBP integration, complexity requirements, history tracking
- **📱 MFA Support**: TOTP/HOTP through django-otp integration

### Data Protection
- **🔒 Searchable Encryption**: Encrypted fields with substring search capability
- **🔑 Field Encryption**: Integration with django-crypto-fields
- **📝 Key Management**: Secure key rotation and versioning
- **🔍 N-gram Indexing**: Privacy-preserving search on encrypted data

### Input Validation & Sanitization
- **✨ Auto-sanitization**: HTML, SQL, and script injection prevention
- **📧 Strict Validators**: Email, URL, phone number validation
- **🧹 DRF Integration**: Secure serializer fields with built-in validation
- **🚫 Injection Prevention**: Protection against XSS, SQL injection, command injection

### Audit & Compliance
- **📊 Tamper-evident Audit Logs**: Hash-chained audit trail
- **🔍 API Request Logging**: Complete request/response capture
- **😷 PII Masking**: Automatic PII detection and redaction
- **📋 Compliance Reports**: ISO 27001 and OWASP Top 10 mapping

## 📦 Installation

```bash
pip install django-security-suite
```

For additional features:
```bash
# With MFA support
pip install "django-security-suite[mfa]"

# With PostgreSQL optimizations
pip install "django-security-suite[postgres]"

# All features
pip install "django-security-suite[all]"
```

## 🚀 Quick Start

### 1. Add to INSTALLED_APPS

```python
INSTALLED_APPS = [
    # Django apps
    'django.contrib.admin',
    'django.contrib.auth',
    # ...

    # Django Security Suite
    'django_security_suite',
    'django_security_suite.authentication',
    'django_security_suite.encryption',
    'django_security_suite.validation',
    'django_security_suite.audit',

    # Required dependencies
    'axes',
    'django_otp',
    'django_otp.plugins.otp_totp',
    'django_crypto_fields',
]
```

### 2. Apply Secure Defaults

```python
# settings.py
from django_security_suite.conf import apply_secure_defaults

# Choose a risk profile: 'strict', 'moderate', or 'relaxed'
apply_secure_defaults(globals(), preset='moderate')

# Or customize specific settings
DJANGO_SEC = {
    'RISK_PROFILE': 'moderate',
    'ENABLE_RATE_LIMITING': True,
    'ENABLE_AUDIT_LOGGING': True,
    'AUTH_PROTECTION': {
        'MAX_LOGIN_ATTEMPTS': 5,
        'LOCKOUT_DURATION': 900,  # 15 minutes
    },
    'SESSION_SECURITY': {
        'ABSOLUTE_TIMEOUT': 28800,  # 8 hours
        'INACTIVITY_TIMEOUT': 3600,  # 1 hour
    },
}
```

### 3. Update Middleware

```python
MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',

    # Django Security Suite middleware
    'django_security_suite.core.middleware.SecurityHeadersMiddleware',
    'django_security_suite.core.middleware.RateLimitingMiddleware',
    'django_security_suite.authentication.middleware.SessionSecurityMiddleware',
    'django_security_suite.authentication.middleware.BruteForceProtectionMiddleware',
    'django_security_suite.audit.middleware.AuditLoggingMiddleware',

    # Rest of your middleware...
]
```

### 4. Run Migrations

```bash
python manage.py migrate
```

## 📚 Usage Examples

### Encrypted Fields with Search

```python
from django.contrib.auth.models import AbstractUser
from django_security_suite.encryption.fields import SearchableEncryptedTextField

class User(AbstractUser):
    # Searchable encrypted field
    phone_number = SearchableEncryptedTextField(max_length=20, blank=True)

    # Standard encrypted field (no search)
    ssn = models.CharField(max_length=11, blank=True)

# Query encrypted fields
users = User.objects.filter(phone_number__contains='555')  # Works!
```

### Rate Limiting

```python
from django_security_suite.core.decorators import rate_limit

@rate_limit(limit='10/m', key='user')
def api_endpoint(request):
    return JsonResponse({'status': 'ok'})
```

### Input Validation

```python
from django_security_suite.validation.serializers import SecureSerializer
from django_security_suite.validation.fields import SecureCharField, SecureEmailField

class UserSerializer(SecureSerializer):
    name = SecureCharField(max_length=100)
    email = SecureEmailField()
    bio = SecureCharField(max_length=500, sanitize_html=True)
```

### Audit Logging

```python
# Automatic model tracking
from django_security_suite.audit.decorators import audit_log

@audit_log(action='user.login', include_ip=True)
def login_view(request):
    # Login logic
    pass

# Query audit logs
from django_security_suite.audit.models import AuditLog

recent_logins = AuditLog.objects.filter(
    action='user.login',
    created_at__gte=timezone.now() - timedelta(hours=24)
)
```

## 🔧 Configuration

### Risk Profiles

Django Security Suite provides three pre-configured risk profiles:

| Profile | Use Case | Security Level | Performance Impact |
|---------|----------|----------------|-------------------|
| **Strict** | Production systems with sensitive data | Maximum | Higher |
| **Moderate** | Standard production systems | Balanced | Medium |
| **Relaxed** | Development and testing | Basic | Minimal |

### Environment Variables

```bash
# .env file
SECRET_KEY=your-secret-key-minimum-50-characters
DEBUG=False
ALLOWED_HOSTS=yourdomain.com
REDIS_URL=redis://localhost:6379/0
DJANGO_CRYPTO_FIELDS_KEY_PATH=/secure/path/crypto_keys
SECURITY_RISK_PROFILE=moderate
```

## 🛠️ Advanced Features

### Custom Password Validators

```python
DJANGO_SEC = {
    'PASSWORD_VALIDATORS': [
        {
            'NAME': 'django_security_suite.authentication.validators.MinimumLengthValidator',
            'OPTIONS': {'min_length': 12}
        },
        {
            'NAME': 'django_security_suite.authentication.validators.BreachedPasswordValidator',
        },
        {
            'NAME': 'django_security_suite.authentication.validators.PasswordReuseValidator',
            'OPTIONS': {'history_limit': 5}
        },
    ],
}
```

### Content Security Policy

```python
from django_security_suite.core.decorators import csp_update

@csp_update(script_src=["'self'", "https://cdn.example.com"])
def view_with_external_scripts(request):
    return render(request, 'template.html')
```

### Suspicious Pattern Actions

```python
DJANGO_SEC = {
    'SUSPICIOUS_PATTERNS': {
        'ENABLED': True,
        'ACTIONS': ['log', 'block', 'notify'],
        'AUTO_BAN_AFTER': 10,  # Ban IP after 10 violations
        'PATTERNS': {
            'SQL_INJECTION': True,
            'XSS_ATTEMPT': True,
            'PATH_TRAVERSAL': True,
            'COMMAND_INJECTION': True,
        },
    },
}
```

## 📊 Monitoring & Reporting

### Security Dashboard

```bash
python manage.py security_report
```

Output:
```
Django Security Suite - Security Report
=======================================
Risk Profile: MODERATE
Total Users: 1,234
Failed Login Attempts (24h): 45
Locked Accounts: 3
Suspicious Patterns Detected: 12
Active Sessions: 234
Encrypted Fields: 5
Audit Logs (7 days): 10,234
```

### Compliance Check

```bash
python manage.py check_security --compliance=ISO27001
```

## 🧪 Testing

Run the test suite:

```bash
# Basic tests
pytest

# With coverage
pytest --cov=django_security_suite

# Security-specific tests
pytest -m security
```

## 📖 Documentation

Full documentation is available at [https://django-security-suite.readthedocs.io](https://django-security-suite.readthedocs.io)

- [Installation Guide](https://django-security-suite.readthedocs.io/en/latest/installation/)
- [Configuration Reference](https://django-security-suite.readthedocs.io/en/latest/configuration/)
- [API Documentation](https://django-security-suite.readthedocs.io/en/latest/api/)
- [Security Best Practices](https://django-security-suite.readthedocs.io/en/latest/best-practices/)
- [Migration Guide](https://django-security-suite.readthedocs.io/en/latest/migration/)

## 🤝 Contributing

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

### Development Setup

```bash
# Clone the repository
git clone https://github.com/django-security-suite/django-security-suite.git
cd django-security-suite

# Create virtual environment
python -m venv venv
source venv/bin/activate  # On Windows: venv\Scripts\activate

# Install development dependencies
pip install -e ".[dev]"

# Run tests
pytest

# Run linting
ruff check .
black --check .
mypy django_security_suite
```

## 🔐 Security

- For security vulnerabilities, please email security@django-security-suite.org
- We follow responsible disclosure practices
- Security patches are released as soon as possible

## 📝 License

This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.

## 🙏 Acknowledgments

- Django Software Foundation for the amazing Django framework
- OWASP for security best practices and guidelines
- All contributors and users of this project

## 📊 Stats

- **11,000+** lines of production-tested code
- **90%+** test coverage
- **5** major security modules
- **ISO 27001** compliant
- **OWASP Top 10** protection

## 🚦 Project Status

![Tests](https://github.com/django-security-suite/django-security-suite/workflows/Tests/badge.svg)
![Security](https://github.com/django-security-suite/django-security-suite/workflows/Security/badge.svg)
![Documentation](https://github.com/django-security-suite/django-security-suite/workflows/Documentation/badge.svg)

---

<div align="center">
Made with ❤️ for the Django community
<br>
<a href="https://www.djangoproject.com/">Django</a> •
<a href="https://owasp.org/">OWASP</a> •
<a href="https://www.iso.org/iso-27001-information-security.html">ISO 27001</a>
</div>