openPGP card: using a readers keypad instead of pinentry-qt

Werner Koch wk at
Thu Feb 12 18:41:47 CET 2009

On Thu, 12 Feb 2009 14:45, malte.gell at said:

> I see. Are there such specific requirements by different card readers that you 
> are forced to individually test them for keypad support? Could someone who 
> owns such a not yet supported reader help you?

Yes, just try it out.  Changing the check in gnupg/scd/ccid-driver.c
should be easy enough.

> order to get keypad support? PCSC has proven to be most reliable to 
> me... I have not been able to get the CCID running. Does GnuPGs internal CCID 

Right.  At the time I implemeted keypad support, tehre was no PC/SC
standard on how to do this.  IIRC, this changed recently but I have no
time to test and implement this.

> driver run with *any* CCID cardreader?

Yes, any modern CCID driver which does automatic protocol negotiation
and provides at least TPDU level exchange.  Everything else is not worth
the trouble and you can resort to pcscd.



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