Perform a FOSS restore of an Apple T2 processor

clean_t2_restore.sh

#!/bin/bash

WORKING_DIRECTORY=`pwd`
repo_list=(libimobiledevice idevicerestore libplist libusbmuxd usbmuxd libirecovery)

for repo in ${repo_list[@]}; do
	directory="$WORKING_DIRECTORY/$repo"
	if [ -d "$directory" ]; then
		rm -rf "$directory"
	fi
done

lockdown_pi.sh

CONFIG_FILE=/boot/config.txt

# Disable WiFi at Device Tree level
 if ! grep -q "pi3-disable-wifi" "$CONFIG_FILE"; then
	sed -i '/\/boot\/overlays\/README/a dtoverlay=pi3-disable-wifi' $CONFIG_FILE
fi

# Disable BlueTooth at Device Tree level
if ! grep -q "pi3-disable-bt" "$CONFIG_FILE"; then
	sed -i '/\/boot\/overlays\/README/a dtoverlay=pi3-disable-bt' $CONFIG_FILE 
fi


# Disable listening services
systemctl disable avahi-daemon.socket
systemctl disable avahi-daemon.service

# Reboot
reboot

perform_t2_restore.sh

#!/bin/bash

RECOVERY_DATA_URL="https://mesu.apple.com/assets/bridgeos/com_apple_bridgeOSIPSW/com_apple_bridgeOSIPSW.xml"

# TODO: Read XML to find current version

# TODO: Verify SHA of downloaded file (Really Apple?  SHA1?)

wget http://updates-http.cdn-apple.com/2020/macos/061-41296-20200124-14D2074C-3EFF-11EA-9B7E-811124EF36D6/iBridge2,1,iBridge2,10,iBridge2,12,iBridge2,14,iBridge2,3,iBridge2,4,iBridge2,5,iBridge2,6,iBridge2,7,iBridge2,8_4.2_17P3050_Restore.ipsw

sudo usbmuxd --foreground --verbose &
idevice --debug --erase --no-input iBridge2,1,iBridge2,10,iBridge2,12,iBridge2,14,iBridge2,3,iBridge2,4,iBridge2,5,iBridge2,6,iBridge2,7,iBridge2,8_4.2_17P3050_Restore.ipsw

prepare_t2_restore.sh

#!/bin/bash

WORKING_DIRECTORY=`pwd`
REPO_LIST=(libplist libusbmuxd libimobiledevice libirecovery usbmuxd idevicerestore)

# Perform full update before work
if [ -z "$(find /var/cache/apt/pkgcache.bin -mmin -1440)" ]; then
	sudo pt update -y
fi

sudo apt upgrade -y

# Install pre-requsites
sudo apt install -y git autoconf automake libtool pkg-config clang libssl-dev python3-dev python-dev llvm gcc libreadline-dev libusb-1.0-0-dev libzip-dev libcurl4-gnutls-dev

# Clone the libimobiledevice world
for repo in ${REPO_LIST[@]}; do
	directory="$WORKING_DIRECTORY/$repo"
	if [ -d "$directory" ]; then
		cd "$directory"
		git pull
	else
		cd $WORKING_DIRECTORY
		git clone "https://github.com/libimobiledevice/$repo.git"
	fi
done

# Build and install each repository in order
for repo in ${REPO_LIST[@]}; do

	cd "$WORKING_DIRECTORY/$repo"

	./autogen.sh

	make

	sudo make install
done