public
/
airgap
5
0
Fork 1
Code Issues Pull Requests 3 Packages Projects Releases Wiki Activity
A live buildroot based Linux distribution designed for managing secrets offline.
190 Commits 13 Branches 0 Tags 2.1 GiB
Shell 44.8%
Dockerfile 42.2%
Makefile 13%
Go to file
Anton Livaja 485fc58bfb
feat: add sig 		2024-08-04 18:15:11 -04:00
audits Updated cure53 audit with corrected authors list 2021-11-04 15:23:16 -07:00
config Working EFI/Bios Stagex boot 2024-06-18 01:45:21 -07:00
dist feat: add sig 2024-08-04 18:15:11 -04:00
rootfs GIT_KEY GIT_PUBKEY 2024-08-04 13:29:39 -07:00
sdcard Virtual sd card support 2024-06-26 00:46:56 -07:00
.dockerignore Create .dockerignore, symlinked from .gitignore 2021-06-20 18:39:14 -04:00
.gitattributes track dist/airgap.iso in lfs 2024-08-02 21:38:46 -07:00
.gitignore ignore additional folders 2024-08-04 13:10:24 -07:00
.gitmodules refactor: replace buildroot/toolchain with stagex 2024-03-01 10:51:15 -08:00
Containerfile GIT_KEY GIT_PUBKEY 2024-08-04 13:29:39 -07:00
LICENSE.md add MIT license 2021-02-25 12:24:46 -08:00
Makefile GIT_KEY GIT_PUBKEY 2024-08-04 13:29:39 -07:00
README.md cache/determinism fixes and doc updates 2024-08-03 15:52:30 -07:00

README.md

AirgapOS

https://git.distrust.co/public/airgap

About

A full-source-bootstrapped, deterministic, minimal, immutable, and offline, workstation linux distribution designed for creating and managing secrets offline.

Built for those of us that want to be -really- sure our most important secrets are managed in a clean environment with an "air gap" between us and the internet with high integrity on the supply chain of the firmware and OS used.

Uses

  • Generate PGP keychain
  • Store/Restore gpg keychain to security token such as a Yubikey or Nitrokey
  • Signing cryptocurrency transactions
  • Generate/backup BIP39 universal cryptocurrency wallet seed
  • Store/Restore BIP39 seed to a hardware wallet such as a Trezor or Ledger

Features

  • Deterministic iso generation for multi-party code->binary verification
  • Small footprint (< 100MB)
  • Immutable and Diskless: runs from initramfs
  • Network support and most drivers removed to minimize exfiltration vectors

Requirements

Software

  • docker 26+

Hardware

  • x86_64 PC or laptop
    • linuxboot/heads firmware supported and recommended for multi-use machine
      • Allows for signed builds, and verification of signed sd card payloads
    • Ensure any Wifi/Disk/Bluetooth/Audio devices are disabled/removed
  • Blank flash drive
  • Blank SD card

Build

Update git submodules

git submodule update --init --recursive

Build a new release

make release

Reproduce an existing release

make attest

Sign an existing release

make sign

Provisioning

  1. Write airgap.iso to CD-ROM or SD Card a. dd if=out/airgap.iso of=/dev/sda bs=1M conv=sync status=progress b. cdrecord out/airgap.iso

  2. Verify media still produces expected hash

sha256sum out/airgap.iso
head -c $(stat -c '%s' airgap.iso) /dev/sda | sha256sum

Setup

Assumes target is running Pureboot or Coreboot/heads

  1. Boot to shell: Options -> Recovery Shell
  2. Mount SD card 
    mount-usb
mount -o remount,rw /media
  3. Insert chosen GPG Smartcard device
  4. Initialize smartcard 
    gpg --card-status
  5. Sign target iso 
    cd /media
gpg --armor --detach-sign airgap.iso
  6. Unmount 
    cd
umount /media
sync
  7. Reboot

Usage

  1. Insert remote attestation device
  2. Power on, and verify successful remote attestation
  3. Boot to airgap via: Options -> Boot Options -> USB Boot

Development

Build develop image

make

Boot image in qemu

make vm

Enter shell in build environment

make shell