131 lines
2.6 KiB
Markdown
131 lines
2.6 KiB
Markdown
# AirgapOS #
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<https://git.distrust.co/public/airgap>
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## About ##
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A full-source-bootstrapped, deterministic, minimal, immutable, and offline,
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workstation linux distribution designed for creating and managing secrets
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offline.
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Built for those of us that want to be -really- sure our most important secrets
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are managed in a clean environment with an "air gap" between us and the
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internet with high integrity on the supply chain of the firmware and OS used.
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## Uses ##
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* Generate PGP keychain
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* Store/Restore gpg keychain to security token such as a Yubikey or Nitrokey
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* Signing cryptocurrency transactions
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* Generate/backup BIP39 universal cryptocurrency wallet seed
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* Store/Restore BIP39 seed to a hardware wallet such as a Trezor or Ledger
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## Features ##
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* Deterministic iso generation for multi-party code->binary verification
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* Small footprint (< 100MB)
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* Immutable and Diskless: runs from initramfs
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* Network support and most drivers removed to minimize exfiltration vectors
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## Requirements ##
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### Software ###
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* docker 26+
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### Hardware ###
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* x86_64 PC or laptop
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* linuxboot/heads firmware supported and recommended for multi-use machine
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* Allows for signed builds, and verification of signed sd card payloads
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* Ensure any Wifi/Disk/Bluetooth/Audio devices are disabled/removed
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* Blank flash drive
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* Blank SD card
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## Build ##
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### Update git submodules
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```
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git submodule update --init --recursive
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```
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### Build a new release
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```
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make release
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```
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### Reproduce an existing release
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```
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make attest
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```
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### Sign an existing release
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```
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make sign
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```
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## Provisioning ##
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1. Write airgap.iso to CD-ROM or SD Card
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a. `dd if=out/airgap.iso of=/dev/sda bs=1M conv=sync status=progress`
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b. `cdrecord out/airgap.iso`
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2. Verify media still produces expected hash
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```
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sha256sum out/airgap.iso
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head -c $(stat -c '%s' airgap.iso) /dev/sda | sha256sum
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```
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## Setup ##
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Assumes target is running Pureboot or Coreboot/heads
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1. Boot to shell: ```Options -> Recovery Shell```
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2. Mount SD card
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```
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mount-usb
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mount -o remount,rw /media
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```
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3. Insert chosen GPG Smartcard device
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4. Initialize smartcard
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```
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gpg --card-status
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```
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5. Sign target iso
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```
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cd /media
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gpg --armor --detach-sign airgap.iso
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```
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6. Unmount
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```
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cd
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umount /media
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sync
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```
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7. Reboot
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## Usage ##
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1. Insert remote attestation device
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2. Power on, and verify successful remote attestation
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3. Boot to airgap via: Options -> Boot Options -> USB Boot
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## Development ##
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### Build develop image
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```
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make
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```
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### Boot image in qemu
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```
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make vm
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```
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### Enter shell in build environment
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```
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make shell
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```
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