[Bug 1967632] Re: [snap] apparmor denied when trying to load pkcs11 module for smart card authentication

[Nathan Teodosio]

The snap on stable/pkcs has been built with (what I gather are) the
essential components — opensc-pkcs11, libpcsclite, and also a couple of
debugging utilities — for the most basic and supported smart cards. You
may want to test it, if so keep reading.

You would also need pcscd installed and started in your system.

There is a merge request[1] currently under review to allow the snap to
use the pcscd socket; Until it's merged you'd need to manually allow
access to the socket in
/var/lib/snapd/apparmor/profiles/snap.chromium.chromium.

So if your smart card is supported by OpenSC[2], the full recipe is

--->
snap install --channel stable/pkcs chromium
apt install pcscd
systemctl start pcscd.socket
editor /var/lib/snapd/apparmor/profiles/snap.chromium.chromium
#Insert "/{var/,}run/pcscd/pcscd.comm rwm," before the last bracket.
apparmor_parser -r 
chromium --enable-logging=stderr &> chr.log
<---

Attach chr.log or the system's journal if you see any relevant error or
denial there.

Bear in mind that I was oblivious to the components involved until I
started looking at this bug and I still don't have a complete picture of
them. So please point out any mistake or omission you can find.

[1] https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1843392/comments/9
[2] https://github.com/snapcore/snapd/pull/12847

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https://bugs.launchpad.net/bugs/1967632

Title:
  [snap] apparmor denied when trying to load pkcs11 module for smart
  card authentication

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