[fprint] The example code doesn't works

[Bastien Nocera]

On Tue, 2013-11-19 at 23:30 +0300, Vasily Khoruzhick wrote:
> On Tue, Nov 19, 2013 at 11:00 PM, Vinícius Souza
> <souzavinicius18 at gmail.com> wrote:
> > Hi Vasily, over here http://vini.w.pw/enrolled(microsoft).pgm and here
> > http://vini.w.pw/enrolled.pgm
> 
> Hi Vinícius,
> 
> I guess uru4k driver was broken for your device (image looks
> encrypted) and last changes to it were made by Timo Teräs.
> Timo, could you take a look what's wrong here?

Looks like a very old bug actually. I have such a device (045e:00ca),
and resetting libfprint to before that commit fixes it:

commit d003f08855ba34be88775e4281e7f686b00f6d2f
Author: Timo Teräs <timo.teras at iki.fi>
Date:   Wed Sep 26 13:41:13 2012 +0300

    lib: Add support for DigitalPersona URU4500
    
    By adding native encryption support, rather than poking at
    the firmware to disable it.
    
    This also makes the URU4000B use native encryption.
    
    https://bugs.freedesktop.org/show_bug.cgi?id=55351

Timo, any ideas?

Vinicius, could you please file a bug so we don't forget?