From 519e9158e8e0860b99104868643dfd44a8fd8a4b Mon Sep 17 00:00:00 2001
From: pks <pks@pks.rocks>
Date: Sun, 8 Aug 2021 15:39:55 +0200
Subject: overhaul

---
 init | 50 +++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 39 insertions(+), 11 deletions(-)

(limited to 'init')

diff --git a/init b/init
index 8c1f7d0..eb7f5d3 100755
--- a/init
+++ b/init
@@ -1,15 +1,23 @@
 #!/bin/busybox sh
 
-ROOT=/dev/disk/by-label/rootfs
-HOME=/dev/disk/by-uuid/092fdc4a-4356-47d9-9272-9a5f58e33bbf
+ROOT_DEV=/dev/disk/by-label/rootfs
+# USB stick w/ keys
+USB_KEY_ID=0781:5567
+USB_KEY_DEV=/dev/disk/by-uuid/953f675b-5c6c-4ae9-ab1b-189e923c945d
+# encrypted home
+HOME_KEY_FILE_NAME=.bogues-home.key
+HOME_DEV=/dev/disk/by-uuid/092fdc4a-4356-47d9-9272-9a5f58e33bbf
+# encrypted sdcard
+EXT_SD_KEY_FILE_NAME=.bogues-ext_sd.key
+EXT_SD_DEV=/dev/disk/by-uuid/c3834c30-2f8e-4955-a682-cf898979b41f
 
 prep_dev()
 {
     for opt in `cat /proc/cmdline`; do
-      name=$(echo $opt | cut -d'=' -f 1)
-      if [ $name == "root" ] || [ $name == "crypt_part" ]; then
+      name=$(echo $opt | cut -d= -f 1)
+      if [ $name == "root" ] || [ $name == "home" ] || [ $name == "ext_sd" ] || [ $name == "usb_key" ]; then
         type=$(echo $opt | cut -d'=' -f 2)
-        id=$(echo $opt | cut -d'=' -f 3)
+        id=$(echo $opt | cut -d= -f 3)
         if [ $type == LABEL ]; then
           prefix="/dev/disk/by-label";
         elif [ $type == UUID ]; then
@@ -34,7 +42,12 @@ rescue_shell()
 cryptsetup_do()
 {
   echo "cryptsetup $1 $2"
-  cryptsetup -T 3 luksOpen $1 $2
+  mkdir -p /run/cryptsetup
+  if [ -f $3 ]; then
+    cryptsetup luksOpen $1 $2 --key-file $3
+  else
+    cryptsetup -T 3 luksOpen $1 $2
+  fi
 }
 
 mount_root()
@@ -43,21 +56,36 @@ mount_root()
   mount $1 /newroot
 }
 
-mkdir -p /dev /proc /sys /newroot /etc
+mkdir -p /dev /proc /sys /newroot /etc /key
 touch /etc/mtab
 
 mount -t devtmpfs none /dev
 mount -t proc none /proc
 mount -t sysfs none /sys
 
+# wait for USB stick w/ keys on it
+for _ in {1..3}; do
+  sleep 3
+  lsusb | grep $USB_KEY_ID 2>&1 /dev/null
+  if [[ $? == 0 ]]; then break; fi
+done
 prep_dev
-resume
-cryptsetup_do $HOME home
-mount_root $ROOT || rescue_shell
+
+# `resume` is currently not used
+#resume
+
+mount_root $ROOT_DEV || rescue_shell
+
+if [ -e $USB_KEY_DEV ]; then
+  mount $USB_KEY_DEV /key 2>&1 > /dev/null
+fi
+
+cryptsetup_do $HOME_DEV home /key/$HOME_KEY_FILE_NAME
+cryptsetup_do $EXT_SD_DEV ext_sd /key/$EXT_SD_KEY_FILE_NAME
 
 umount /dev
 umount /proc
 umount /sys
+umount /key 2>&1 > /dev/null
 
 exec switch_root /newroot /sbin/init
-
-- 
cgit v1.2.3