Hi Filipe, On Mon, Jun 18, 2018 at 11:22:04AM +0300, Felipe Balbi wrote: > > Hi, > > Marcus Folkesson <marcus.folkesson@xxxxxxxxx> writes: > > 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 :-) > > On Wed, May 30, 2018 at 04:04:15PM +0200, Marcus Folkesson wrote: > >> Hi Filipe, > >> > >> On Wed, May 30, 2018 at 03:28:18PM +0300, Felipe Balbi wrote: > >> > Marcus Folkesson <marcus.folkesson@xxxxxxxxx> writes: > >> > > >> > > 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@xxxxxxxxx> > >> > > >> > 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. > > -- > balbi Thanks, Best regards Marcus Folkesson -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
