mrdanielps / Validity90

Reverse engineering of Validity/Synaptics 138a:0090, 138a:0094, 138a:0097, 06cb:0081, 06cb:009a fingerprint readers protocol

Validity90

This project aims on reverse engineering protocol of Validity 138a:0090, 138a:0094, 138a:0097, 06cb:0081, 06cb:009a fingerprint readers, creating specification and FLOSS libfprint driver.

Discussions

Main chat of this project:

libfrprint issue: https://bugs.freedesktop.org/show_bug.cgi?id=94536 Lenovo forums: https://forums.lenovo.com/t5/Linux-Discussion/Validity-Fingerprint-Reader-Linux/td-p/3352145

Notable files

1. spec.md - Specification draft, the main work goes here right now.
2. dissector.lua - Wireshark dissector for decrypting communication after key exchange.
3. libfprint directory - libfprint repo with this driver integrated Not ready at the moment.
4. prototype - Standalone prototype(extremly ugly code, would be completly rewritten for driver)

Testing

Prototype testers are needed, please share your result and join us in our Gitter.

Status

Device	Status
138a:0090	Scan, Image output, Internal DB check works in prototype. There is also a match-on-host libfprint driver by @3v1n0 based on prototype source(138a:0090 only). You can use it untill proper unified driver is available.
138a:0097	Scan, Internal DB check works in prototype
138a:0094	Doesn't work yet, but looks promising. I will try to work on it after 90/97
06cb:0081	So far looks identical to 138a:0094
06cb:009a	Init works, leds work, scan doesn't work yet
138a:0091	Different protocol, out of scope for this project. Check out Validity91 which aims to reverse engineer it.

Task	Specification/Analysis	Prototype	Driver
Initialization	Done	Done	Not Started
Configuration/Reconfig	In progress	In progress	Not Started
Pre TLS key exchange	In progress	Done	Not Started
TLS	Done	Done	Not Started
90: Ops: scan, LED, etc	In progress	Scan, LED works	Not Started
97: Ops: enroll, check, reset, LED, etc	In progress	Check works	Not Started
Image format	In progress	Done	Not Started

Donations

Please consider donating to support the development.
With paypal:
With BTC: 1AsoCUGNVniBSBS359u2wKrA2CZiTgKZkM
With ETH: 0x005D8d9b5609b9A3Ec8B3cBd463a949405A8d621