[fprint] USB ID 04f3:0903 "Elan Microelectronics Corp." First step

[Vasily Khoruzhick]

If you don't see bitmap pattern then it's likely that traffic is encrypted.

On Wed, Mar 22, 2017 at 9:28 AM, Sébastien Béchet
<sebastien.bechet at osinix.com> wrote:
> Hello,
>
> I have done a first step for "ELAN WBF Fingerprint Sensor" implementation.
>
> How i have done that:
>
> 1. Windows 10 in VirtualBox with USB hardware mapped
> 2. usbmod then "tshark -D" and "tshark -i usbmon0 -w rip.pcap".
>
> I now have four files :
>
> 1. When I boot Windows 10 : elan-ms-windows-01-open.pcapng
> 2. When I record one finger :
> elan-ms-windows-02-record-finger-notperfectfilter.pcapng
> 3. When I test one finger : elan-ms-windows-03-test-finger.pcapng
> 4. When I shutdown Windows 10 : elan-ms-windows-04-close.pcapng
>
> Now, if i test one finger (or record), I receive two blocs of bytes paquets
> :
> first one : 5184 bytes
> second one : 13376 bytes
>
> I looked these bytes, but can't see real bitmap inside.
>
> Can anyone help me to undersand how to find width and height? Maybe these
> bytes can be crypted?
>
> Not sure I can send files on the ML but you can ask me.
>
> PS :
>
> I found two files that can help :
> 774896 EngineAdapter.dll
> 192744 WbfUsbDriver.dll
>
> and
>
> Winhec_Windows10FingerprintIntroductionandImplementation.pdf (search
> engine...)
>
>
> Thank you.
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