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Setup guide

Step 1: log in to Raspberry Pi

Replace 10.0.1.248 with IP of Raspberry Pi.

ssh pi@10.0.1.248 -i ~/.ssh/pi

Install Adafruit PiTFT monitor drivers

Heads-up: don’t worry about PITFT Failed to disable unit: Unit file fbcp.service does not exist..

Heads-up: when asked to reboot, type n and press enter.

$ sudo apt update

$ sudo apt install -y git python3-pip

$ sudo pip3 install adafruit-python-shell click==7.0

$ git clone https://github.com/adafruit/Raspberry-Pi-Installer-Scripts.git

$ cd Raspberry-Pi-Installer-Scripts

$ sudo python3 adafruit-pitft.py --display=28c --rotation=90 --install-type=console

$ cd ~

$ rm -fr Raspberry-Pi-Installer-Scripts

Heads-up: when asked to reboot, select “No” and press enter.

sudo raspi-config

Select “System Options”, then “Boot / Auto Login”, then “Console” and finally “Finish”.

Step 3: configure keyboard keymap

Heads-up: following instructions are for Raspberry Pi keyboard (US model).

Heads-up: when asked to reboot, select “No” and press enter.

sudo raspi-config

Select “Localisation Options”, then “Keyboard”, then “Generic 105-key PC (intl.)”, then “Other”, then “English (US)”, then “English (US)”, then “The default for the keyboard layout”, then “No compose key” and finally “Finish”.

Step 4: install dependencies available on repositories

$ sudo apt update

$ sudo apt install -y fim imagemagick

$ pip3 install mnemonic pillow qrcode --user

$ echo -e "export GPG_TTY=\"\$(tty)\"\nexport PATH=\$PATH:/home/pi/.local/bin" >> ~/.bashrc

$ source ~/.bashrc

Step 5: install zbar from source

Install zbar dependencies

$ sudo apt update

$ sudo apt install -y autopoint build-essential git libjpeg-dev libmagickwand-dev libtool libv4l-dev

Clone zbar repository

$ cd ~

$ git clone https://github.com/mchehab/zbar

$ cd zbar

$ git checkout 0.23.90

Configure, compile and install zbar

$ autoreconf -vfi

$ ./configure --without-python

$ make

$ sudo make install

$ sudo ldconfig

$ rm -fr ~/zbar

Step 6: install sss-cli from source

Install Rust

$ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
info: downloading installer

Welcome to Rust!

This will download and install the official compiler for the Rust
programming language, and its package manager, Cargo.

Rustup metadata and toolchains will be installed into the Rustup
home directory, located at:

  /home/pi/.rustup

This can be modified with the RUSTUP_HOME environment variable.

The Cargo home directory located at:

  /home/pi/.cargo

This can be modified with the CARGO_HOME environment variable.

The cargo, rustc, rustup and other commands will be added to
Cargo's bin directory, located at:

  /home/pi/.cargo/bin

This path will then be added to your PATH environment variable by
modifying the profile files located at:

  /home/pi/.profile
  /home/pi/.bashrc

You can uninstall at any time with rustup self uninstall and
these changes will be reverted.

Current installation options:


   default host triple: armv7-unknown-linux-gnueabihf
     default toolchain: stable (default)
               profile: default
  modify PATH variable: yes

1) Proceed with installation (default)
2) Customize installation
3) Cancel installation
>1

info: profile set to 'default'
info: default host triple is armv7-unknown-linux-gnueabihf
info: syncing channel updates for 'stable-armv7-unknown-linux-gnueabihf'
info: latest update on 2021-03-25, rust version 1.51.0 (2fd73fabe 2021-03-23)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-std'
 19.6 MiB /  19.6 MiB (100 %)  11.0 MiB/s in  2s ETA:  0s
info: downloading component 'rustc'
 81.9 MiB /  81.9 MiB (100 %)  10.6 MiB/s in 10s ETA:  0s
info: downloading component 'rustfmt'
info: installing component 'cargo'
info: using up to 500.0 MiB of RAM to unpack components
  5.5 MiB /   5.5 MiB (100 %)   3.5 MiB/s in  1s ETA:  0s
info: installing component 'clippy'
info: installing component 'rust-std'
 19.6 MiB /  19.6 MiB (100 %)   3.1 MiB/s in  6s ETA:  0s
info: installing component 'rustc'
 81.9 MiB /  81.9 MiB (100 %)   3.0 MiB/s in 33s ETA:  0s
info: installing component 'rustfmt'
  3.3 MiB /   3.3 MiB (100 %)   3.1 MiB/s in  2s ETA:  0s
info: default toolchain set to 'stable-armv7-unknown-linux-gnueabihf'

  stable-armv7-unknown-linux-gnueabihf installed - rustc 1.51.0 (2fd73fabe 2021-03-23)


Rust is installed now. Great!

To get started you need Cargo's bin directory ($HOME/.cargo/bin) in your PATH
environment variable. Next time you log in this will be done
automatically.

To configure your current shell, run:
source $HOME/.cargo/env

Install sss-cli

$ cd ~

$ cargo install --git https://github.com/dsprenkels/sss-cli --branch v0.1

$ cp ~/.cargo/bin/secret-share* ~/.local/bin/

Step 7 (optional): install Electrum (required to generate Electrum mnemonic)

Install Electrum dependencies

sudo apt install -y libsecp256k1-0 python3-cryptography

Set Electrum release semver environment variable

Heads-up: replace 4.1.2 with latest release.

ELECTRUM_RELEASE_SEMVER=4.1.2

Download Electrum release and PGP signature

curl -O "https://download.electrum.org/$ELECTRUM_RELEASE_SEMVER/Electrum-$ELECTRUM_RELEASE_SEMVER.tar.gz"
curl -O "https://download.electrum.org/$ELECTRUM_RELEASE_SEMVER/Electrum-$ELECTRUM_RELEASE_SEMVER.tar.gz.asc"

Import ThomasV’s PGP public key

$ curl https://raw.githubusercontent.com/spesmilo/electrum/master/pubkeys/ThomasV.asc | gpg --import
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  4739  100  4739    0     0  22459      0 --:--:-- --:--:-- --:--:-- 22459
gpg: /home/pi/.gnupg/trustdb.gpg: trustdb created
gpg: key 2BD5824B7F9470E6: public key "Thomas Voegtlin (https://electrum.org) <thomasv@electrum.org>" imported
gpg: Total number processed: 1
gpg:               imported: 1

imported: 1

👍

Verify Electrum release using GnuPG (learn how here)

$ gpg --verify Electrum-$ELECTRUM_RELEASE_SEMVER.tar.gz.asc
gpg: assuming signed data in 'Electrum-$ELECTRUM_RELEASE_SEMVER.tar.gz'
gpg: Signature made Thu 08 Apr 2021 09:47:30 EDT
gpg:                using RSA key 6694D8DE7BE8EE5631BED9502BD5824B7F9470E6
gpg: Good signature from "Thomas Voegtlin (https://electrum.org) <thomasv@electrum.org>" [unknown]
gpg:                 aka "ThomasV <thomasv1@gmx.de>" [unknown]
gpg:                 aka "Thomas Voegtlin <thomasv1@gmx.de>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: 6694 D8DE 7BE8 EE56 31BE  D950 2BD5 824B 7F94 70E6

Good signature

👍

Install Electrum

pip3 install --user Electrum-$ELECTRUM_RELEASE_SEMVER.tar.gz

Step 8 (optional): install `screen` and trezorcrl (required to validate integrity of Trezor encrypted paper backups)

$ sudo apt install -y screen

$ pip3 install attrs trezor --user

$ sudo curl https://data.trezor.io/udev/51-trezor.rules -o /etc/udev/rules.d/51-trezor.rules

Step 9: import Sun’s PGP public key (used to verify downloads bellow)

$ curl https://sunknudsen.com/sunknudsen.asc | gpg --import
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  6896  100  6896    0     0   6499      0  0:00:01  0:00:01 --:--:--  6499
gpg: key C1323A377DE14C8B: public key "Sun Knudsen <hello@sunknudsen.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1

imported: 1

👍