# Security Policy

## Reporting a Vulnerability

If you discover a security vulnerability in calyxos, please report it responsibly. We appreciate your efforts to disclose the issue to us first before any public disclosure.

### How to Report

**For critical vulnerabilities (e.g., arbitrary code execution, authentication bypass):**

Please open a private GitHub security advisory at:
https://github.com/krish-shahh/calyxos/security/advisories

Or email with details about:
- Description of the vulnerability
- Steps to reproduce (if applicable)
- Potential impact
- Suggested fix (if you have one)

### Response Timeline

- **Initial Response:** Within 48 hours
- **Status Update:** Every 7 days
- **Patch Release:** Within 30 days of confirmation (depending on severity)

## Security Considerations

### What We Protect Against

calyxos is designed with security in mind:

- **SQL Injection:** All database operations use parameterized queries
- **Unsafe Deserialization:** Only JSON is used (no pickle/eval)
- **Path Traversal:** Safe pathlib usage with deterministic filenames
- **Command Injection:** No shell commands executed
- **Thread Safety:** Proper locking mechanisms in place
- **Dependency Security:** Zero production dependencies (no supply chain risk)

### What We Don't Protect Against

calyxos is **not** designed to:

- Protect secrets or credentials (use environment variables or secret management systems)
- Prevent side-channel attacks on cached values
- Provide cryptographic guarantees (hashing is for caching only, not security)
- Secure inter-process communication (run as trusted code only)

### Secure Usage

To use calyxos securely:

1. **Don't cache sensitive data** - Avoid using @fn on methods that compute with secrets
2. **Isolate calyxos objects** - Keep them within a single trusted process
3. **Use secure storage** - Store persistence files with appropriate file permissions
4. **Validate inputs** - Validate all external inputs before computation
5. **Run in trusted environments** - Execute calyxos code only in trusted environments

## Security Audit

calyxos undergoes regular security audits. The most recent audit:

- **Date:** December 13, 2024
- **Status:** ✅ Approved for release
- **Coverage:** Static analysis, dependency review, cryptography review, threading analysis
- **Critical Issues:** 0
- **High Priority Issues:** 0
- **Test Coverage:** 85%+ on core modules

## Dependencies

calyxos has **zero production dependencies**, significantly reducing security risk.

### Development Dependencies (Not in Production)

- pytest - Testing framework
- pytest-cov - Coverage reporting
- mypy - Static type checking
- ruff - Code linting
- black - Code formatting

All development dependencies are from trusted, widely-used projects.

## Best Practices

### For Contributors

- Use `mypy` with strict mode: `mypy src/calyxos/`
- Run tests: `pytest tests/`
- Lint code: `ruff check src/`
- Don't introduce new dependencies without discussion
- Add tests for security-sensitive code

### For Users

- Keep calyxos updated to the latest version
- Review the CHANGELOG for security fixes
- Use official releases from PyPI (not development versions)
- Report any suspicious behavior

## Compliance

calyxos follows security best practices from:

- OWASP Top 10 prevention guidelines
- Python secure coding practices
- Open source security standards

## Contact

For security questions or concerns:
- GitHub Issues: https://github.com/krish-shahh/calyxos/issues
- GitHub Security Advisory: https://github.com/krish-shahh/calyxos/security/advisories

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**Last Updated:** December 13, 2024
**Version:** 0.1.0
