Linux Flexxon tool

This tool allows you to use Flexxon X-mask and X-mask PRO on Linux systems.

Warning

This doesn't require the password. It uses a vulnerability on these cards that allow you to disable the masking protection.

Also, once unlocked, the protection is fully disabled, even if you remove the card. You need to lock it once done to restore the "protection".

Building

make

Running

Unlocking a card

./flexxon-tool --device /dev/mmcblk0 --unlock

Locking a card

./flexxon-tool --device /dev/mmcblk0 --lock

Show card password

Note: This only works on X-mask, not the PRO

./flexxon-tool --device /dev/mmcblk0 --password

AI disclaimer

Part of this code was AI-generated using Copilot. To be more specific, I used AI to convert the encoding algorithm from my Python script to C.