Hi Filipe,

On Fri, Jun 22, 2018 at 06:48:23PM +0200, Marcus Folkesson wrote:

Hi Filipe,

On Mon, Jun 18, 2018 at 11:22:04AM +0300, Felipe Balbi wrote:

quoted

Hi,

Marcus Folkesson [off-list ref] writes:

quoted

Hi Felipe,

Should I send out v4 or what do you think?

sorry for the delay, have been busy with other tasks.

It is no hurry :-)

quoted

quoted

On Wed, May 30, 2018 at 04:04:15PM +0200, Marcus Folkesson wrote:

quoted

Hi Filipe,

On Wed, May 30, 2018 at 03:28:18PM +0300, Felipe Balbi wrote:

quoted

Marcus Folkesson [off-list ref] writes:

quoted

Chip Card Interface Device (CCID) protocol is a USB protocol that
allows a smartcard device to be connected to a computer via a card
reader using a standard USB interface, without the need for each manufacturer
of smartcards to provide its own reader or protocol.

This gadget driver makes Linux show up as a CCID device to the host and let a
userspace daemon act as the smartcard.

This is useful when the Linux gadget itself should act as a cryptographic
device or forward APDUs to an embedded smartcard device.

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>

this could be done entirely in userspace with functionfs, why do we need
this part in the kernel? It does very little.

Andrzej pointed this out, and I actually do not have any good answer
more than that the userspace application could be kept small and the
important configuration of the CCID device is done with well (I hope)
documented configfs attributes.

can we use existing open source applications without modification by
accepting this glue layer?

If you mean existing open source application to talk to the "daemon", the answer is
yes. I have been using PCSC-lite and OpenSC on Linux, and PCSC on
Windows to communicate with the smartcard.

If you mean existing application as the "daemon", the answer is probably
no.

Just sending a friendly ping on this one.
I've sent out v4 as I had it prepared for a long time, just to catch
comments in the meanwhile, but none so far.

quoted

-- 
balbi

Thanks,

Best regards
Marcus Folkesson

Thanks,

Best regards
Marcus Folkesson

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