Unpack and repack tool for TP-Link AX55 firmware (may work with other firmwares using safeload image format and ubi image)

Requirements:
python, python-pip, ubi_reader python module (pip install ubi_reader), squashfs-tools (apt install squashfs-tools), make, gcc

Usage:
1. compile md5-fix utility, execute:
make
2. Unpack stock firmware with 01-unpack.sh, e.g.
./01-unpack.sh ax55v1-up-all-ver1-1-1-P1[20220621-rel71166]_sign_2022-06-21_20.01.15.bin

3. Modify files under squashfs-root

4. Repack firmware with 02-repack.sh, e.g.
./02-repack.sh myfw.bin