Re: How to find out which process is accessing the card?

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2017-10-24 10:28 GMT+02:00 Franti=C5=A1ek =C5=98ez=C3=A1=C4=8D <frantisek.r=
[email protected]>:

> I was surprised by your solution based on proc/maps, I expected something
> more specific to the pcsc stack, but I gave it a try and I think I have
> found what I'm looking for. But it wasn't straightforward so I'm sending
> some notes back.
>
> Most importantly I was surprised how many processes are running with pcsc
> lib all the time. For example I definitely wasn't expecting wpasupplicant=
.
>

wpasupplicant has support of EAP-SIM authentication scheme. To read the SIM
card it needs to use PC/SC.

Those processes however were not accessing smart card at all so I had to
> conduct a better analysis looking at those processes found by your tool f=
or
> a longer time and I found a behavior pattern which pointed to the final
> offender (gdm-session-worker). So although it wasn't as simple as I would
> like, your tool helped a lot, thanks.
>

libpcsclite can be loaded by a chain of library. My tool [1] will only give
you the name of the process.
I don't think it it possible to tell which library loaded libpcsclite.so.1
just at looking at the /proc/*/maps files.

I am happy my (simple) tool helped you.

Bye

[1]
https://github.com/LudovicRousseau/contrib/blob/master/list_pcsc_applicatio=
ns.sh

--=20
 Dr. Ludovic Rousseau

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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">2017=
-10-24 10:28 GMT+02:00 Franti=C5=A1ek =C5=98ez=C3=A1=C4=8D <span dir=3D"ltr=
">&lt;<a href=3D"mailto:[email protected]" target=3D"_blank">fr=
[email protected]</a>&gt;</span>:<br><blockquote class=3D"gmail_q=
uote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,2=
04);padding-left:1ex"><div dir=3D"ltr">I was surprised by your solution bas=
ed on proc/maps, I expected something more specific to the pcsc stack, but =
I gave it a try and I think I have found what I&#39;m looking for. But it w=
asn&#39;t straightforward so I&#39;m sending some notes back.<div><br></div=
><div>Most importantly I was surprised how many processes are running with =
pcsc lib all the time. For example I definitely wasn&#39;t expecting wpasup=
plicant. </div></div></blockquote><div><br></div><div>wpasupplicant has sup=
port of EAP-SIM authentication scheme. To read the SIM card it needs to use=
 PC/SC.<br></div><div><br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-lef=
t:1ex"><div dir=3D"ltr"><div>Those processes however were not accessing sma=
rt card at all so I had to conduct a better analysis looking at those proce=
sses found by your tool for a longer time and I found a behavior pattern wh=
ich pointed to the final offender (gdm-session-worker). So although it wasn=
&#39;t as simple as I would like, your tool helped a lot, thanks.</div></di=
v></blockquote><div><br></div>libpcsclite can be loaded by a chain of libra=
ry. My tool [1] will only give you the name of the process.</div><div class=
=3D"gmail_quote">I don&#39;t think it it possible to tell which library loa=
ded libpcsclite.so.1 just at looking at the /proc/*/maps files.<br></div></=
div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">I am ha=
ppy my (simple) tool helped you.</div><div class=3D"gmail_extra"><br></div>=
<div class=3D"gmail_extra">Bye</div><br>[1] <a href=3D"https://github.com/L=
udovicRousseau/contrib/blob/master/list_pcsc_applications.sh">https://githu=
b.com/LudovicRousseau/contrib/blob/master/list_pcsc_applications.sh</a><br>=
<br>-- <br><div class=3D"gmail_extra"><div class=3D"gmail_signature">=C2=A0=
Dr. Ludovic Rousseau</div>
</div></div>

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