Validity90
Reverse engineering of Validity/Synaptics 138a:0090, 138a:0094, 138a:0097, 06cb:0081, 06cb:009a fingerprint readers protocol
Install / Use
/learn @nmikhailov/Validity90README
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://gitlab.freedesktop.org/libfprint/libfprint/issues/54
Lenovo forums: https://forums.lenovo.com/t5/Linux-Discussion/Validity-Fingerprint-Reader-Linux/td-p/3352145
Notable files
- spec.md - Specification draft, the main work goes here right now.
- dissector.lua - Wireshark dissector for decrypting communication after key exchange.
- ~libfprint directory - libfprint repo with this driver integrated~ Not ready at the moment.
- 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
