Hi, Now I realized some new facts about the fingerprint data. The header "4954 020d" is repeated (even longer sequence is repeated) every 1196 bytes in the stream. This could actually mean, that the transfer in fact consist of strips. I tried to assemble PGM image from the strip, but I didn't find any structure in the data.
Any suggestions? Dne Sun, 20 Mar 2011 22:18:15 +0100 Petr Dlouhý <petr.dlo...@email.cz> napsal(a): > Hi, > > I played with this a little more. I wrote quick&dirty prototype based on > aes2501 (1). You can download it from [2], it contains also some of the > logs I posted previously and some additional logs. I also guessed some of > the codes in the communication - they are described in "codes.txt" file. > > Now, I am able to make the prototype wait (functions aesStartScan() and > aesDetectFinger()) until the a finger is attached to sensor and actually > receive (function aesReadFingerprint()) fingerprint data (but the sensor > must be left initialized from virtualized Windows). > The main issue now, is to determine, the format of fingerprint data. You > can get the data from "logs/output.txt" (log from my prototype) or > "logs/08ff:1680.usblog" (log from Wireshark) files. The fingerprint data > are transfered in few (~4) packages 16384 bytes long, first package is > always beginning with the header 4954020d. > The fingerprints are not transfered in stripes (unlike in other sensors) > and might be encrypted. > > I was also experimenting with initialization of the sensor. I was able to > follow (file 1u-my_module-best.txt) the communication along with the > original schema (file 1u-init-and-reading.txt). The device successfully > went to state "7050080 1625011e", but then it is starting to differ. I am > not able to follow it further probably because the communication uses > some > kind of encryption tokens or so (see "vimdiff 1u-init-and-reading-1.txt > 1u-init-and-reading.txt"). > The question is, whether I am able to encrypt the tokens same as the > original software. > > > > > > Please have look at the fingerprint data, and try to guess, what is their > format. > > > > > > PS: I have found, what type of the sensor I have - I probably have > AES1660 > (3). > > [1] http://aes2501-wy.sourcearchive.com/ > [2] http://www.uloz.to/8365105/aes1660-prototype-tar-bz2 > [3] http://www.authentec.com/a/Production/smartsensors_pc/AES1660.aspx > > Dne Sat, 19 Mar 2011 23:25:53 +0100 Petr Dlouhý <petr.dlo...@email.cz> > napsal(a): > > -- Petr Dlouhý _______________________________________________ fprint mailing list fprint@reactivated.net http://lists.reactivated.net/mailman/listinfo/fprint
