Sync Fritz!BOX Wifi-Password and SSID to hostapd

fritzbox_update.sh

#!/bin/bash

# Set to your FB addr
_BOXURL="http://fritz.box"
_USERNAME="wlanscript"
_PASSWORD="veryverysecurepassword"

# DO NOT EDIT FROM HERE
_CHALLENGE=$(curl -s "${_BOXURL}/login_sid.lua?username=${_USERNAME}" |\
  grep -Po '(?<=<Challenge>).*(?=</Challenge>)')
  
_MD5=$(echo -n ${_CHALLENGE}"-"${_PASSWORD} |\
  iconv -f ISO8859-1 -t UTF-16LE |\
  md5sum -b | awk '{print substr($0,1,32)}')
  
_RESPONSE="${_CHALLENGE}-${_MD5}"
#curl -v -i -s -k -d "response=${_RESPONSE}&lp=&username=${_USERNAME}" "${_BOXURL}" 
_SID=$(curl -i -s -k -d "response=${_RESPONSE}&username=${_USERNAME}" "${_BOXURL}" |\
      grep -Po -m 1 '(?<=sid=)[a-f\d]+')

#uiView_SSID
#ssid=the_ssid
#grep ^ssid= /etc/hostapd/hostapd.conf
SSID=$(curl -sSL "${_BOXURL}/data.lua" -d "xhr=1&sid=${_SID}&lang=de&no_sidrenew=&page=wSet" |\
      grep -E '<input.*id="uiView_SSID"' |\
      grep -Eo '"([^"]*)"' | tr -d '"' |\
      tail -n 1 | perl -MHTML::Entities -e 'while(<>) {print decode_entities($_);}' | tr -d '\n' )

PSK=$(curl -sSL "${_BOXURL}/data.lua" -d "xhr=1&sid=${_SID}&lang=de&no_sidrenew=&page=wKey" |\
      grep -E '<input.*id="uiViewpskvalue"' | grep -Eo '"([^"]*)"' |\
      tr -d '"' | tail -n 1 | perl -MHTML::Entities -e 'while(<>) {print decode_entities($_);}')

# Change SSID and reload if nessesacry
test -z $(grep ^ssid=$SSID /etc/hostapd/hostapd.conf) && \
      sed -i.bak "s/^ssid=.*$/ssid=$SSID/g" /etc/hostapd/hostapd.conf && kill -HUP $( pidof hostapd )

TMPPSK=$(mktemp /tmp/psk.XXXXX)
cat <<EOF > $TMPPSK
00:00:00:00:00:00 $PSK
EOF

# Reload hostap if password changed
diff -q $TMPPSK /etc/hostapd.wpa_psk > /dev/null || \
  (mv $TMPPSK /etc/hostapd.wpa_psk && kill -HUP $( pidof hostapd )) && rm $TMPPSK