The frontend has now been secured far better. It now uses its own user

account with limited permissions. Openbox's menu also does not allow the
user to open potentially dangerous programs anymore.

OctoPrint account no longer randomizes its password as it is more
secure to have it not have one at all.

Condensed Nginx listening address interpreter.

Frontend check to see if Nginx and OctoPrint has been improved. It
should now be reliable.

Added touchscreen calibration.

Octo-config service menu is now deeper, which results in a cleaner
interface.

Octo-config now has a somewhat crude system health checking menu.

MJPG's resolution and framerate can now be configured.

Updated TODO

TODO.md

@@ -3,12 +3,6 @@
 ## First time/Octo-Config
 - Add network configuration (replace nmtui)
 - Add hostname configuration (replace nmtui)
-- Better service configuration (deeper menu)
-- System check
-- Touch screen calibration
-
-## Frontend
-- Separate frontend from pi account
 
 ## Nginx
 - Add HTTP basic auth (especially to MJPG)

stage1/01-sys-tweaks/00-run.sh

@@ -9,6 +9,7 @@ install -m 644 files/.dialogrc "${ROOTFS_DIR}/etc/skel/.dialogrc"
 install -m 644 files/.dialogrc "${ROOTFS_DIR}/root/.dialogrc"
 mkdir -p "${ROOTFS_DIR}/etc/skel/.config/openbox"
 install -m 644 files/autostart "${ROOTFS_DIR}/etc/skel/.config/openbox/autostart"
+install -m 644 files/menu.xml "${ROOTFS_DIR}/etc/skel/.config/openbox/menu.xml"
 
 on_chroot << EOF
 if ! id -u ${FIRST_USER_NAME} >/dev/null 2>&1; then
@@ -17,7 +18,10 @@ fi
 if ! id -u octoprint >/dev/null 2>&1; then
   adduser --system --shell /usr/sbin/nologin --group --disabled-password --gecos "" octoprint
 fi
+if ! id -u kiosk >/dev/null 2>&1; then
+	adduser --disabled-password --shell /usr/sbin/nologin --gecos "" kiosk 
+fi
 echo "${FIRST_USER_NAME}:${FIRST_USER_PASS}" | chpasswd
-echo "octoprint:$(cat /dev/urandom | tr -dc _A-Z-a-z-0-9 | head -c40)" | chpasswd 
+echo "kiosk:$(cat /dev/urandom | tr -dc _A-Z-a-z-0-9 | head -c40)" | chpasswd 
 echo "root:$(cat /dev/urandom | tr -dc _A-Z-a-z-0-9 | head -c40)" | chpasswd
 EOF

stage1/01-sys-tweaks/files/.browser.sh

@@ -1,25 +1,25 @@
 #!/bin/bash
 
 # Grabs the port (and IP) out of the nginx config
-LISTEN=$(grep -i listen /etc/nginx/listen.conf | awk '{gsub(";",""); print $2}')
+LISTEN=$(awk '/listen/{gsub(";",""); print $2}' /etc/nginx/listen.conf)
 
 # If the value we just grabbed doesn't contain an IP, prepend localhost
 if ! echo $LISTEN | grep ":" 2>&1; then
-  ADDRESS="localhost:$LISTEN"
+  ADDRESS="https://localhost:$LISTEN"
 else
-  ADDRESS=$LISTEN
+  ADDRESS="https://$LISTEN"
 fi
 
 # Override the automatically detected address if the user wants to
 if [[ -f ~/.overrideurl.sh ]]; then source ~/.overrideurl.sh; fi
 
 # Wait until Nginx/override comes up
-while ! curl "$ADDRESS" 2>&1 >/dev/null; do
+while ! curl -f -k -s -I "$ADDRESS" 2>&1 >/dev/null; do
   sleep 1
 done
 
 # Wait until OctoPrint comes up if it is enabled
-while [[ -f /etc/systemd/system/multi-user.target.wants/octoprint.service ]] && ! curl "localhost:5000"; do
+while [[ -f /etc/systemd/system/multi-user.target.wants/octoprint.service ]] && ! curl -f -s -I "localhost:5000"; do
   sleep 1
 done
 
@@ -31,4 +31,4 @@ done
 # -K | Enable kiosk mode (doesn't seem to do anything?)
 # -n | Disable web inspector
 # -p | Disable plugins
-surf -t -F -g -K -n -p "https://$ADDRESS"
+surf -t -F -g -K -n -p "$ADDRESS"

stage1/01-sys-tweaks/files/menu.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<openbox_menu xmlns="http://openbox.org/"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://openbox.org/
+                file:///usr/share/openbox/menu.xsd">
+
+<menu id="root-menu" label="Openbox 3">
+  <item label="Restart Browser">
+    <action name="Execute"><execute>bash ~/.browser.sh</execute></action>
+  </item>
+  <separator />
+  <item label="Restart GUI">
+    <action name="Exit" />
+  </item>
+</menu>
+
+</openbox_menu> 

stage2/01-sys-tweaks/01-run.sh

@@ -46,6 +46,9 @@ done
 for GRP in dialout plugdev video users; do
   adduser octoprint \$GRP
 done
+for GRP in users; do
+  adduser kiosk \$GRP
+done
 EOF
 
 on_chroot << EOF

stage2/06-utils/files/first-time.sh

@@ -68,6 +68,9 @@ dialog --title "NOTICE" --nocancel --colors --msgbox "This collection of softwar
 
 # Force the user to change the pi user's password before the RPi gets botnetted
 change_password
+# Randomize the root and frontend password
+echo "kiosk:$(cat /dev/urandom | tr -dc _A-Z-a-z-0-9 | head -c40)" | chpasswd 
+echo "root:$(cat /dev/urandom | tr -dc _A-Z-a-z-0-9 | head -c40)" | chpasswd
 
 dialog --title "Network Configuration" --nocancel --msgbox "Setup will now open nmtui, a program to help configure your ethernet/wireless interfaces. Hit Quit when you are done." 10 50
 nmtui
@@ -76,10 +79,14 @@ nmtui
 dpkg-reconfigure tzdata
 
 # Enable/disable OctoPrint, GUI, MJPG and SSH
-service_select 
+service_toggle 
 
 screen_timeout
 
+if ( udevadm info --export-db | grep ID_INPUT_TOUCHSCREEN=1 >/dev/null ) && dialog --title "Touchscreen Calibration" --defaultno --yesno "Do you wish to calibrate your touchscreen?\nMost touchscreens are calibrated out of the factory, so this is usually not needed." 10 60; then
+  startx $(which xinput_calibrator) --no-timeout --output-filename /etc/X11/xorg.conf.d/99-calibration.conf 
+fi 
+
 # Makes a certificate and key for Nginx HTTPS
 openssl req -x509 -nodes -days 36500 -newkey rsa:4096 -subj "/C=/ST=/L=/O=/OU=/CN=*/emailAddress=" -out /etc/ssl/certs/nginx-octoprint.crt -keyout /etc/ssl/private/nginx-octoprint.key
 
@@ -90,6 +97,7 @@ fi
 
 # If MJPG service is enabled, ask user which video device to use
 if [[ -f /etc/systemd/system/multi-user.target.wants/mjpg-streamer.service ]]; then
+  video_select
   video_config
 fi
 

stage2/06-utils/files/octo-config

@@ -9,23 +9,74 @@ fi
 source /usr/local/lib/octo-lib.sh
 
 main_menu () {
-  local MAINMENU=$(dialog --nocancel --title "Pi Setup" --menu "" 10 50 0 \
+  local MAINMENU=$(dialog --nocancel --title "TouchPrint Setup" --menu "" 10 50 0 \
      "1" "Configure networking" \
      "2" "Change password for pi" \
      "3" "Configure services" \
      "4" "Configure screen timeout" \
-     "5" "Configure Nginx" \
-     "6" "Configure MJPG" \
-     "7" "Exit" 3>&1 1>&2 2>&3)
+     "5" "Calibrate touchscreen" \
+     "6" "Exit" 3>&1 1>&2 2>&3)
 
   case $MAINMENU in
     "1") nmtui; main_menu; return 0;;
     "2") change_password; main_menu; return 0;;
-    "3") service_select; main_menu; return 0;;
+    "3") services_menu; main_menu; return 0;;
     "4") screen_timeout; main_menu; return 0;;
-    "5") nginx_config; main_menu; return 0;;
-    "6") video_config; main_menu; return 0;;
-    "7") return 0;;
+    "5") dialog --title "Touchscreen Calibration" --infobox "Waiting for touchscreen calibrator to close..." 3 50; DISPLAY=:0 xinput_calibrator --no-timeout --output-filename /etc/X11/xorg.conf.d/99-calibration.conf; main_menu; return 0;;
+    "6") return 0;;
+  esac 
+}
+
+services_menu () {
+  local SERVICESMENU=$(dialog --nocancel --title "Services Select" --menu "" 10 50 0 \
+     "1" "Enable/disable services" \
+     "2" "Service health check" \
+     "3" "Configure Nginx" \
+     "4" "Configure MJPG" \
+     "5" "Go Back" 3>&1 1>&2 2>&3) 
+
+  case $SERVICESMENU in
+    "1") service_toggle; services_menu; return 0;;
+    "2") service_health; services_menu; return 0;;
+    "3") nginx_config; services_menu; return 0;;
+    "4") video_menu; services_menu; return 0;;
+    "5") return 0;;
+  esac 
+}
+
+service_health () {
+  # Grab listening address/port from Nginx config
+  if [[ -f /etc/nginx/listen.conf ]]; then
+    LISTEN=$(awk '/listen/{gsub(";",""); print $2}' /etc/nginx/listen.conf)
+  else
+    LISTEN="443"
+  fi
+  
+  # If Nginx config didn't contain a port, assume localhost
+  if ! echo $LISTEN | grep ":" 2>&1; then
+    ADDRESS="localhost:$LISTEN"
+  else
+    ADDRESS=$LISTEN
+  fi
+
+  # I hate bash, and soon you will too
+  dialog --colors --title "Service Health" --msgbox "\
+\ZnOctoPrint: \Zb$(if curl -s -I 127.0.0.1:5000 >/dev/null; then echo '\Z2Online'; elif [[ ! -f /etc/systemd/system/multi-user.target.wants/octoprint.service ]]; then echo "Disabled"; else echo '\Z1Offline'; fi)
+\ZnMJPG:      \Zb$(if curl -s -I 127.0.0.1:9000 >/dev/null; then echo '\Z2Online'; elif [[ ! -f /etc/systemd/system/multi-user.target.wants/mjpg-streamer.service ]]; then echo "Disabled"; else echo '\Z1Offline'; fi)
+\ZnNginx:     \Zb$(if curl -k -s -I https://$ADDRESS >/dev/null; then echo '\Z2Online'; elif [[ ! -f /etc/systemd/system/multi-user.target.wants/nginx.service ]]; then echo "Disabled"; else echo '\Z1Offline'; fi)
+\ZnSSH:       \Zb$(if pgrep sshd >/dev/null; then echo '\Z2Online'; elif [[ ! -f /etc/systemd/system/multi-user.target.wants/sshd.service ]]; then echo "Disabled"; else echo '\Z1Offline'; fi)" 0 0
+}
+
+video_menu () {
+  local VIDEOMENU=$(dialog --title "MJPG Config" --menu "" 10 50 0 \
+    "1" "Camera Selection" \
+    "2" "Video Settings" \
+    "3" "Go Back" 3>&1 1>&2 2>&3)
+
+  case $VIDEOMENU in
+    "1") video_select; video_menu; return 0;;
+    "2") video_config; video_menu; return 0;;
+    "3") return 0;;
   esac
 } 
 

stage2/06-utils/files/octo-lib.sh

@@ -19,7 +19,7 @@ change_password () {
   unset PASSWORD
 }
 
-service_select () {
+service_toggle () {
   # Toggle the checkboxes if the service is active or not
   local SERVICE_MENU=$(dialog --separate-output --nocancel --title "Select services" --checklist "Enable/disable services" 0 0 0 \
     "1" "OctoPrint" $(if [[ -f /etc/systemd/system/multi-user.target.wants/octoprint.service ]]; then echo "ON"; else echo "OFF"; fi) \
@@ -69,7 +69,6 @@ service_select () {
     systemctl disable ssh
   fi
 
-
 << 'EOF'
   for ((i = 0; i <= 3; i++)); do
     for n in "${SERVICE_MENU[@]}"; do
@@ -93,7 +92,10 @@ EOF
 
 screen_timeout () {
   local TIMEOUT=$(dialog --nocancel --title "Screen Timeout" --inputbox "Input your desired screen timeout in seconds.\nEnter \"off\" to disable the screen timeout.\n\nAdding a screen timeout can reduce screen burn in.\n\nDefault: off" 12 60 "off" 3>&1 1>&2 2>&3) 
-  cat > /home/pi/.xtimeout << EOF
+  
+  [[ "$TIMEOUT" == "" ]] && return 0
+
+  cat > /home/kiosk/.xtimeout << EOF
     xset s ${TIMEOUT}
     xset -dpms 
 EOF
@@ -104,24 +106,29 @@ nginx_config () {
   
   # Grab the variable from the nginx conf if it exists, otherwise use default
   if [[ -f /etc/nginx/listen.conf ]]; then
-    LISTEN=$(grep -i listen /etc/nginx/listen.conf | awk '{gsub(";",""); print $2}')
+    LISTEN=$(awk '/listen/{gsub(";",""); print $2}' /etc/nginx/listen.conf) 
   else
     LISTEN="443"
   fi
   
   LISTEN=$(dialog --title "Nginx Config" --nocancel --inputbox "Configure what port and IP Nginx should listen on.\nTo listen on all IPs, just enter the port.\nDefault: 443" 11 50 "$LISTEN" 3>&1 1>&2 2>&3)
 
+  [[ "$LISTEN" == "" ]] && return 0
+
   # Write new value to nginx
   echo "listen $LISTEN;" > /etc/nginx/listen.conf
 }
   
-video_config () {
+video_select () {
   # In the unlikely event that there are no video devices, don't continue
   if ! ls /dev/video* 2>&1 >/dev/null; then
     dialog --title "Error" --msgbox "No video devices detected!" 10 50
     return 1
   fi
 
+  # Grab config values
+  source /usr/local/etc/mjpg-server/config.sh 
+
   # Grab all video devices
   local DEVICES=($(ls /dev/video*))
   
@@ -129,13 +136,41 @@ video_config () {
 
   # Generate a menu from said video devices
   for ((i = 0; i < ${#DEVICES[@]}; i++)); do
+    if [[ "$VIDEO_DEVICE" == ${DEVICES[$i]} ]]; then
+      DEVICELIST+="${DEVICES[$i]} $i ON "
+    else
       DEVICELIST+="${DEVICES[$i]} $i OFF "
+    fi
   done
 
-  local DEVICE_MENU=$(dialog --title "Video Config" --nocancel --radiolist "Choose which video device you wish to use for MJPG-Streamer" 10 50 0 $DEVICELIST 3>&1 1>&2 2>&3)
+  local DEVICE_MENU=$(dialog --title "MJPG Config" --nocancel --radiolist "Choose which video device you wish to use for MJPG-Streamer" 10 50 0 $DEVICELIST 3>&1 1>&2 2>&3)
   
   [[ "$DEVICE_MENU" == "" ]] && return 0
  
-  # Write selected value to startup script
-  echo -e '#!/bin/bash'"\n/usr/local/bin/mjpeg-server -a 127.0.0.1:9000 -- ffmpeg -i $DEVICE_MENU -f v4l2 -f mpjpeg -" > /usr/local/bin/start-mjpg
+  # Write selected value to config file 
+  echo -e "VIDEO_DEVICE=$DEVICE_MENU\nVIDEO_SIZE=$VIDEO_SIZE\nFRAMERATE=$FRAMERATE" > /usr/local/etc/mjpg-server/config.sh 
+}
+
+video_config () {
+  # Include config values
+  source /usr/local/etc/mjpg-server/config.sh
+
+  # Set video device to a resonable default if it isn't set for some reason
+  if [[ "$VIDEO_DEVICE" == "" ]]; then
+    VIDEO_DEVICE="/dev/video0"
+  fi  
+
+  local VIDEOCONFIG_MENU=$(dialog --nocancel --title "MJPG Config" --form "Choose desired camera resolution and framerate." 10 50 0\
+    "Resolution: " 1 1 "$VIDEO_SIZE" 1 13 10 0 \
+    "Framerate: " 2 1 "$FRAMERATE" 2 12 3 0 3>&1 1>&2 2>&3)
+  VIDEOCONFIG_MENU=($VIDEOCONFIG_MENU)
+
+  if [[ "$VIDEOCONFIG_MENU[0]" == "" ]] || [[ "$VIDEOCONFIG_MENU[1]" == "" ]]; then
+    dialog --title "Error" --msgbox "Invalid input!" 10 50
+    video_config
+    return 0
+  fi
+
+  # Write values to config file 
+  echo -e "VIDEO_DEVICE=$VIDEO_DEVICE\nVIDEO_SIZE=${VIDEOCONFIG_MENU[0]}\nFRAMERATE=${VIDEOCONFIG_MENU[1]}" > /usr/local/etc/mjpg-server/config.sh 
 }

stage3/00-install-packages/01-run.sh

@@ -1,41 +1,7 @@
 #!/bin/bash -e
 
-#echo -n -e "NODM_USER=${FIRST_USER_NAME}\nNODM_XSESSION=/home/${FIRST_USER_NAME}/.xprofile" > ${ROOTFS_DIR}/etc/nodm.conf
-
-cat > ${ROOTFS_DIR}/etc/default/nodm << EOF
-# nodm configuration
-
-# Set NODM_ENABLED to something different than 'false' to enable nodm
-NODM_ENABLED=true
-
-# User to autologin for
-NODM_USER=${FIRST_USER_NAME}
-
-# First vt to try when looking for free VTs
-NODM_FIRST_VT=7
-
-# X session
-NODM_XSESSION=/home/${FIRST_USER_NAME}/.xprofile
-
-# Options for nodm itself
-NODM_OPTIONS=
-
-# Options for the X server.
-#
-# Format: [/usr/bin/<Xserver>] [:<disp>] <Xserver-options>
-#
-# The Xserver executable and the display name can be omitted, but should
-# be placed in front, if nodm's defaults shall be overridden.
-NODM_X_OPTIONS='-nolisten tcp'
-
-# If an X session will run for less than this time in seconds, nodm will wait an
-# increasing bit of time before restarting the session.
-NODM_MIN_SESSION_TIME=60
-
-# Timeout (in seconds) to wait for X to be ready to accept connections. If X is
-# not ready before this timeout, it is killed and restarted.
-NODM_X_TIMEOUT=300
-EOF 
+mkdir -p ${ROOTFS_DIR}/etc/default
+install -m 644 files/nodm ${ROOTFS_DIR}/etc/default/nodm
 
 # Probably not needed
 on_chroot << EOF

stage3/00-install-packages/files/nodm

@@ -0,0 +1,33 @@
+# nodm configuration
+
+# Set NODM_ENABLED to something different than 'false' to enable nodm
+NODM_ENABLED=true
+
+# User to autologin for
+NODM_USER=kiosk
+
+# First vt to try when looking for free VTs
+NODM_FIRST_VT=7
+
+# X session
+NODM_XSESSION=/home/kiosk/.xprofile
+
+# Options for nodm itself
+NODM_OPTIONS=
+
+# Options for the X server.
+#
+# Format: [/usr/bin/<Xserver>] [:<disp>] <Xserver-options>
+#
+# The Xserver executable and the display name can be omitted, but should
+# be placed in front, if nodm's defaults shall be overridden.
+NODM_X_OPTIONS='-nolisten tcp'
+
+# If an X session will run for less than this time in seconds, nodm will wait an
+# increasing bit of time before restarting the session.
+NODM_MIN_SESSION_TIME=60
+
+# Timeout (in seconds) to wait for X to be ready to accept connections. If X is
+# not ready before this timeout, it is killed and restarted.
+NODM_X_TIMEOUT=300
+