Mstar-bin-tool

Avoid the "Download ZIP" method; use Git to ensure you get the submodules (if any).

git clone https://github.com/lionsharp/mstar-bin-tool.git
cd mstar-bin-tool

Cause: The offset calculator failed. Use --force-offset <hex> manually by inspecting the header structure.

MStar binaries generally do not follow standard partitioning tables (like GPT or MBR) at the start of the file. Instead, they utilize a custom header structure (often located at specific offsets) that describes the partitions.

Key structural elements include:

cpio -idmv < rootfs.cpio
# modify
find . | cpio -o -H newc > new_rootfs.cpio

The config file is critical. Example:

[General]
format=mstar
[Header]
size=1024
magic=MSTAR
encrypted=0
[Partitions]
count=5
[Partition0]
name=bootloader
offset=0x1000
size=0x80000
type=raw
[Partition1]
name=kernel
offset=0x81000
size=0x400000
type=zimage mstar-bin-tool
[Partition2]
name=rootfs
offset=0x481000
size=0x2000000
type=squashfs
[Partition3]
name=logo
offset=0x2481000
size=0x100000
type=raw
[Partition4]
name=params
offset=0x2581000
size=0x10000
type=env

You must obtain or create the correct config for your device. Often found in the tool's configs/ folder or in device forums.

Even with a good tool, firmware extraction can fail. Here is how to diagnose common errors.

With great power comes great responsibility. mstar-bin-tool is frequently used for:

Ethical Warning: Do not use this tool to bypass security mechanisms on devices you do not own. Modifying firmware may void warranties and violate terms of service. Additionally, repacking a malicious rootfs and flashing it to someone else's device is illegal. Avoid the "Download ZIP" method; use Git to

Legal Note: Reverse engineering for interoperability is protected in many jurisdictions (US DMCA exemptions for security research), but always check local laws.