meta-secureos A Yocto Meta-Layer for a Secure Raspberry Pi 4 OS

This Yocto meta-layer is dedicated to building a hardened and secure operating system for the Raspberry Pi 4, leveraging kernel hardening techniques, SELinux enforcement, and the power of the KAS build system.

Core Features

• Kernel Hardening: Incorporates kernel-level security enhancements to mitigate vulnerabilities and protect against exploits
• SELinux: Implements SELinux mandatory access control to confine processes and limit their potential impact.
• Custom Recipes: Includes tailored recipes for additional security measures and configurations specific to the Raspberry Pi 4
• KAS Build System: Utilizes the KAS build system for granular control and reproducibility in image construction

Getting Started

1. Prerequisites

   • Install kas build tool from PyPi (sudo pip3 install kas)

2. KAS Project Setup

   • Create a KAS project and configure it to include:
     • meta-secure-rpi4
     • meta-raspberrypi
     • meta-security
     • Any other required layers

3. Configuration

   • Customize the KAS configuration to enable:
     • Kernel hardening features
     • SELinux policy enforcement
     • Desired packages and configurations
     • Other security-related settings

4. Build

   • Execute the KAS build process to generate the secure Raspberry Pi 4 image. kas build kas-poky-rpi.yml

5. Flash to system

   • Use bmaptool to copy the generated .wic.bz2 file to the SD card

Contributing

Contributions are welcome! Feel free to submit pull requests or open issues to help improve this meta-layer.

Disclaimer

While this meta-layer aims to enhance security, it does not guarantee absolute protection. Always follow best security practices and stay informed about potential threats.

License

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