From 943c893a6fa16f8a78481a5efebae4c3ea62626d Mon Sep 17 00:00:00 2001
From: Sun Knudsen <hello@sunknudsen.com>
Date: Thu, 22 Apr 2021 09:33:45 -0400
Subject: [PATCH] Implemented trezor-restore feature and fixed tmux-buttons bug

---
 .../README.md                                 | 70 ++++++++++-----
 .../tmux-buttons.py                           | 11 +--
 .../tmux-buttons.py.sig                       | 26 +++---
 .../trezor-restore.sh                         | 88 +++++++++++++++++++
 .../trezor-restore.sh.sig                     | 16 ++++
 .../trezor-verify-integrity.sh                | 31 +++----
 .../trezor-verify-integrity.sh.sig            | 26 +++---
 7 files changed, 194 insertions(+), 74 deletions(-)
 create mode 100755 how-to-create-encrypted-paper-backup/trezor-restore.sh
 create mode 100644 how-to-create-encrypted-paper-backup/trezor-restore.sh.sig

diff --git a/how-to-create-encrypted-paper-backup/README.md b/how-to-create-encrypted-paper-backup/README.md
index 89f6e89..5af12aa 100644
--- a/how-to-create-encrypted-paper-backup/README.md
+++ b/how-to-create-encrypted-paper-backup/README.md
@@ -45,7 +45,7 @@ ssh pi@10.0.1.248 -i ~/.ssh/pi
 ```console
 $ sudo apt update
 
-$ sudo apt install -y git python3-pip
+$ sudo apt install -y git python3-pip python3-rpi.gpio
 
 $ sudo pip3 install adafruit-python-shell click==7.0
 
@@ -230,7 +230,7 @@ $ pip3 install --user Electrum-$ELECTRUM_RELEASE_SEMVER.tar.gz
 $ rm Electrum-$ELECTRUM_RELEASE_SEMVER.tar.gz*
 ```
 
-### Step 8: install `tmux` and [trezorcrl](https://wiki.trezor.io/Using_trezorctl_commands_with_Trezor) (used to verify integrity of [Trezor](https://trezor.io/) devices)
+### Step 8: install `tmux` and [trezorcrl](https://wiki.trezor.io/Using_trezorctl_commands_with_Trezor) (used to verify integrity of and restore [Trezor](https://trezor.io/) devices)
 
 ```console
 $ sudo apt update
@@ -242,17 +242,7 @@ $ pip3 install attrs trezor --user
 $ sudo curl -o /etc/udev/rules.d/51-trezor.rules https://data.trezor.io/udev/51-trezor.rules
 ```
 
-### Step 9: install `python3-rpi.gpio` and `keyboard` (used to control `tmux` panes)
-
-```console
-$ sudo apt update
-
-$ sudo apt install -y python3-rpi.gpio
-
-$ sudo pip3 install keyboard
-```
-
-### Step 10: import Sun’s PGP public key (used to verify downloads bellow)
+### Step 9: import Sun’s PGP public key (used to verify downloads bellow)
 
 ```console
 $ curl https://sunknudsen.com/sunknudsen.asc | gpg --import
@@ -268,7 +258,7 @@ imported: 1
 
 👍
 
-### Step 11: download and verify [create-bip39-mnemonic.py](./create-bip39-mnemonic.py)
+### Step 10: download and verify [create-bip39-mnemonic.py](./create-bip39-mnemonic.py)
 
 ```console
 $ curl -o /home/pi/.local/bin/create-bip39-mnemonic.py https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/create-bip39-mnemonic.py
@@ -302,7 +292,7 @@ Good signature
 
 👍
 
-### Step 12: download and verify [validate-bip39-mnemonic.py](./validate-bip39-mnemonic.py)
+### Step 11: download and verify [validate-bip39-mnemonic.py](./validate-bip39-mnemonic.py)
 
 ```console
 $ curl -o /home/pi/.local/bin/validate-bip39-mnemonic.py https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/validate-bip39-mnemonic.py
@@ -336,7 +326,7 @@ Good signature
 
 👍
 
-### Step 13: download and verify [tmux-buttons.py](./tmux-buttons.py)
+### Step 12: download and verify [tmux-buttons.py](./tmux-buttons.py)
 
 ```console
 $ curl -o /home/pi/.local/bin/tmux-buttons.py https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/tmux-buttons.py
@@ -351,7 +341,7 @@ $ curl -o /home/pi/.local/bin/tmux-buttons.py.sig https://sunknudsen.com/static/
 
 $ gpg --verify /home/pi/.local/bin/tmux-buttons.py.sig
 gpg: assuming signed data in '/home/pi/.local/bin/tmux-buttons.py'
-gpg: Signature made Wed 21 Apr 2021 09:23:12 EDT
+gpg: Signature made Thu Apr 22 09:13:47 2021 EDT
 gpg:                using RSA key A98CCD122243655B26FAFB611FA767862BBD1305
 gpg: Good signature from "Sun Knudsen <hello@sunknudsen.com>" [unknown]
 gpg: WARNING: This key is not certified with a trusted signature!
@@ -370,7 +360,7 @@ Good signature
 
 👍
 
-### Step 14: download and verify [qr-backup.sh](./qr-backup.sh)
+### Step 13: download and verify [qr-backup.sh](./qr-backup.sh)
 
 ```console
 $ curl -o /home/pi/.local/bin/qr-backup.sh https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/qr-backup.sh
@@ -404,7 +394,7 @@ Good signature
 
 👍
 
-### Step 15: download and verify [qr-restore.sh](./qr-restore.sh)
+### Step 14: download and verify [qr-restore.sh](./qr-restore.sh)
 
 ```console
 $ curl -o /home/pi/.local/bin/qr-restore.sh https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/qr-restore.sh
@@ -438,7 +428,7 @@ Good signature
 
 👍
 
-### Step 16: download and verify [qr-clone.sh](./qr-clone.sh)
+### Step 15: download and verify [qr-clone.sh](./qr-clone.sh)
 
 ```console
 $ curl -o /home/pi/.local/bin/qr-clone.sh https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/qr-clone.sh
@@ -472,7 +462,7 @@ Good signature
 
 👍
 
-### Step 17: download and verify [secure-erase.sh](./secure-erase.sh)
+### Step 16: download and verify [secure-erase.sh](./secure-erase.sh)
 
 ```console
 $ curl -o /home/pi/.local/bin/secure-erase.sh https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/secure-erase.sh
@@ -506,7 +496,7 @@ Good signature
 
 👍
 
-### Step 18: download and verify [trezor-verify-integrity.sh](./trezor-verify-integrity.sh) (used to validate Trezor devices)
+### Step 17: download and verify [trezor-verify-integrity.sh](./trezor-verify-integrity.sh) (used to validate Trezor devices)
 
 ```console
 $ curl -o /home/pi/.local/bin/trezor-verify-integrity.sh https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/trezor-verify-integrity.sh
@@ -521,7 +511,7 @@ $ curl -o /home/pi/.local/bin/trezor-verify-integrity.sh.sig https://sunknudsen.
 
 $ gpg --verify /home/pi/.local/bin/trezor-verify-integrity.sh.sig
 gpg: assuming signed data in '/home/pi/.local/bin/trezor-verify-integrity.sh'
-gpg: Signature made Wed Apr 21 13:15:30 2021 EDT
+gpg: Signature made Thu Apr 22 09:13:56 2021 EDT
 gpg:                using RSA key A98CCD122243655B26FAFB611FA767862BBD1305
 gpg: Good signature from "Sun Knudsen <hello@sunknudsen.com>" [unknown]
 gpg: WARNING: This key is not certified with a trusted signature!
@@ -540,6 +530,40 @@ Good signature
 
 👍
 
+### Step 18: download and verify [trezor-restore.sh](./trezor-restore.sh) (used to validate Trezor devices)
+
+```console
+$ curl -o /home/pi/.local/bin/trezor-restore.sh https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/trezor-restore.sh
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100  1283  100  1283    0     0   1189      0  0:00:01  0:00:01 --:--:--  1189
+
+$ curl -o /home/pi/.local/bin/trezor-restore.sh.sig https://sunknudsen.com/static/media/privacy-guides/how-to-create-encrypted-paper-backup/trezor-restore.sh.sig
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100   833  100   833    0     0    944      0 --:--:-- --:--:-- --:--:--   944
+
+$ gpg --verify /home/pi/.local/bin/trezor-restore.sh.sig
+gpg: assuming signed data in '/home/pi/.local/bin/trezor-restore.sh'
+gpg: Signature made Thu Apr 22 09:14:04 2021 EDT
+gpg:                using RSA key A98CCD122243655B26FAFB611FA767862BBD1305
+gpg: Good signature from "Sun Knudsen <hello@sunknudsen.com>" [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: C4FB DDC1 6A26 2672 920D  0A0F C132 3A37 7DE1 4C8B
+     Subkey fingerprint: A98C CD12 2243 655B 26FA  FB61 1FA7 6786 2BBD 1305
+
+$ chmod 700 /home/pi/.local/bin/trezor-restore.sh
+```
+
+Primary key fingerprint matches [published](../how-to-encrypt-sign-and-decrypt-messages-using-gnupg-on-macos#verify-suns-pgp-public-key-using-its-fingerprint) fingerprints
+
+👍
+
+Good signature
+
+👍
+
 ### Step 19: make filesystem read-only
 
 > Heads-up: shout-out to Nico Kaiser for his amazing [guide](https://gist.github.com/nicokaiser/08aa5b7b3958f171cf61549b70e8a34b) on how to configure a read-only Raspberry Pi.
diff --git a/how-to-create-encrypted-paper-backup/tmux-buttons.py b/how-to-create-encrypted-paper-backup/tmux-buttons.py
index d18f0e7..22e9626 100644
--- a/how-to-create-encrypted-paper-backup/tmux-buttons.py
+++ b/how-to-create-encrypted-paper-backup/tmux-buttons.py
@@ -1,5 +1,5 @@
 import RPi.GPIO as GPIO
-import keyboard
+import subprocess
 import time
 
 GPIO.setmode(GPIO.BCM)
@@ -10,13 +10,14 @@ GPIO.setup(23, GPIO.IN, pull_up_down = GPIO.PUD_UP)
 
 def click(channel):
   if channel == 17:
-    keyboard.send("ctrl+b, up")
+    subprocess.run(["tmux", "select-pane", "-t", "0"])
   elif channel == 22:
-    keyboard.send("ctrl+b, down")
+    subprocess.run(["tmux", "select-pane", "-t", "1"])
   elif channel == 23:
-    keyboard.send("ctrl+b, shift+7")
+    subprocess.run(["tmux", "kill-session"])
   # elif channel == 27:
-  #   keyboard.send("")
+  #   subprocess.run(["tmux"])
+  
 GPIO.add_event_detect(17, GPIO.RISING, callback=click, bouncetime=300)
 GPIO.add_event_detect(22, GPIO.RISING, callback=click, bouncetime=300)
 GPIO.add_event_detect(23, GPIO.RISING, callback=click, bouncetime=300)
diff --git a/how-to-create-encrypted-paper-backup/tmux-buttons.py.sig b/how-to-create-encrypted-paper-backup/tmux-buttons.py.sig
index 29e5c00..ce8259f 100644
--- a/how-to-create-encrypted-paper-backup/tmux-buttons.py.sig
+++ b/how-to-create-encrypted-paper-backup/tmux-buttons.py.sig
@@ -1,16 +1,16 @@
 -----BEGIN PGP SIGNATURE-----
 
-iQIzBAABCgAdFiEEqYzNEiJDZVsm+vthH6dnhiu9EwUFAmCAJ0AACgkQH6dnhiu9
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-=gTZ3
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+I2by6x5m9m5L6aK0ipD/hP/n3uUHvFitnPjNYY3FJvCYXLMME1I=
+=RWAj
 -----END PGP SIGNATURE-----
diff --git a/how-to-create-encrypted-paper-backup/trezor-restore.sh b/how-to-create-encrypted-paper-backup/trezor-restore.sh
new file mode 100755
index 0000000..c041e6d
--- /dev/null
+++ b/how-to-create-encrypted-paper-backup/trezor-restore.sh
@@ -0,0 +1,88 @@
+#! /bin/bash
+
+set -e
+set -o pipefail
+
+function cleanup()
+{
+  kill 0
+  exit 0
+}
+
+trap cleanup EXIT
+
+positional=()
+while [[ $# -gt 0 ]]; do
+  argument="$1"
+  case $argument in
+    -h|--help)
+    printf "%s\n" \
+    "Usage: trezor-restore.sh [options]" \
+    "" \
+    "Options:" \
+    "  --label <label>        set Trezor label" \
+    "  --qr-restore-options   see \`qr-restore.sh --help\`" \
+    "  -h, --help             display help for command"
+    exit 0
+    ;;
+    --qr-restore-options)
+    qr_restore_options=$2
+    shift
+    shift
+    ;;
+    --label)
+    label=$2
+    shift
+    shift
+    ;;
+    *)
+    positional+=("$1")
+    shift
+    ;;
+  esac
+done
+
+set -- "${positional[@]}"
+
+bold=$(tput bold)
+red=$(tput setaf 1)
+normal=$(tput sgr0)
+
+basedir=$(dirname "$0")
+
+label_arg=""
+if [ -n "$label" ]; then
+  label_arg="--label \"$label\" "
+fi
+
+tput reset
+
+printf "$bold$red%s$normal\n" "Restore Trezor device using encrypted paper backup (y or n)?"
+read -r answer
+if [ "$answer" != "y" ]; then
+  printf "%s\n" "Cancelled"
+  exit 0
+fi
+
+printf "$bold$red%s$normal\n" "TREZOR WILL BE PERMANENTLY WIPED."
+
+printf "$bold$red%s$normal\n" "Do you wish to proceed (y or n)?"
+read -r answer
+if [ "$answer" != "y" ]; then
+  printf "%s\n" "Cancelled"
+  exit 0
+fi
+
+printf "%s\n" "Spawning tmux panes…"
+
+sleep 1
+
+python3 $basedir/tmux-buttons.py &
+
+tmux new -d -s trezor-restore
+tmux rename-window -t trezor-restore trezorctl
+tmux send-keys -t trezor-restore "trezorctl wipe-device && trezorctl recovery-device --pin-protection --passphrase-protection $label_arg--words 24 --type scrambled" Enter
+tmux split-window -t trezor-restore
+tmux rename-window -t trezor-restore qr-restore
+tmux send-keys -t trezor-restore "qr-restore.sh $(echo $qr_restore_options | sed 's/--word-list *//') --word-list" Enter
+tmux attach -t trezor-restore
diff --git a/how-to-create-encrypted-paper-backup/trezor-restore.sh.sig b/how-to-create-encrypted-paper-backup/trezor-restore.sh.sig
new file mode 100644
index 0000000..3ad32de
--- /dev/null
+++ b/how-to-create-encrypted-paper-backup/trezor-restore.sh.sig
@@ -0,0 +1,16 @@
+-----BEGIN PGP SIGNATURE-----
+
+iQIzBAABCgAdFiEEqYzNEiJDZVsm+vthH6dnhiu9EwUFAmCBdpwACgkQH6dnhiu9
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+aCnI3KXuhwRYaIfIub9T9xZZoktHb8CLPDQRhrUeIDW1j5rqQag=
+=hbtz
+-----END PGP SIGNATURE-----
diff --git a/how-to-create-encrypted-paper-backup/trezor-verify-integrity.sh b/how-to-create-encrypted-paper-backup/trezor-verify-integrity.sh
index d5c4c80..61bd62b 100755
--- a/how-to-create-encrypted-paper-backup/trezor-verify-integrity.sh
+++ b/how-to-create-encrypted-paper-backup/trezor-verify-integrity.sh
@@ -5,11 +5,11 @@ set -o pipefail
 
 function cleanup()
 {
-  sudo kill 0
+  kill 0
   exit 0
 }
 
-trap cleanup INT EXIT
+trap cleanup EXIT
 
 positional=()
 while [[ $# -gt 0 ]]; do
@@ -17,7 +17,7 @@ while [[ $# -gt 0 ]]; do
   case $argument in
     -h|--help)
     printf "%s\n" \
-    "Usage: trezor-validate.sh [options]" \
+    "Usage: trezor-verify-integrity.sh [options]" \
     "" \
     "Options:" \
     "  --qr-restore-options   see \`qr-restore.sh --help\`" \
@@ -49,21 +49,12 @@ printf "%s\n" "Spawning tmux panes…"
 
 sleep 1
 
-sudo bash -c "python3 $basedir/tmux-buttons.py &"
+python3 $basedir/tmux-buttons.py &
 
-tmux new -d -s trezor-validate
-tmux rename-window -t trezor-validate trezorctl
-tmux send-keys -t trezor-validate "trezorctl recovery-device --words 24 --type scrambled --dry-run" Enter
-tmux split-window -t trezor-validate
-tmux rename-window -t trezor-validate qr-restore
-tmux send-keys -t trezor-validate "qr-restore.sh $(echo $qr_restore_options | sed 's/--word-list *//') --word-list" Enter
-tmux attach -t trezor-validate
-
-tput reset
-
-printf "$bold%s$normal\n" "Press ctrl+c to exit"
-
-while :
-do
-  sleep 60
-done
+tmux new -d -s trezor-verify-integrity
+tmux rename-window -t trezor-verify-integrity trezorctl
+tmux send-keys -t trezor-verify-integrity "trezorctl recovery-device --words 24 --type scrambled --dry-run" Enter
+tmux split-window -t trezor-verify-integrity
+tmux rename-window -t trezor-verify-integrity qr-restore
+tmux send-keys -t trezor-verify-integrity "qr-restore.sh $(echo $qr_restore_options | sed 's/--word-list *//') --word-list" Enter
+tmux attach -t trezor-verify-integrity
diff --git a/how-to-create-encrypted-paper-backup/trezor-verify-integrity.sh.sig b/how-to-create-encrypted-paper-backup/trezor-verify-integrity.sh.sig
index 3b2cb82..d7ceaf0 100644
--- a/how-to-create-encrypted-paper-backup/trezor-verify-integrity.sh.sig
+++ b/how-to-create-encrypted-paper-backup/trezor-verify-integrity.sh.sig
@@ -1,16 +1,16 @@
 -----BEGIN PGP SIGNATURE-----
 
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