SmartCard: Encryption/Decryption problem
Georg C. F. Greve
greve at fsfeurope.org
Thu May 5 11:44:21 CEST 2005
|| On Thu, 05 May 2005 10:49:18 +0200
|| Werner Koch <wk at gnupg.org> wrote:
>> Who would have to analyse this?
wk> I did extensive code staring and could not find a problem in my
wk> code. Given that I don't have any problems when using a reader
wk> with an updated firmware, I am pretty sure that it is the
wk> reader's fault.
Do we know whether this problem reproduceable under Windows?
If not: Where is the difference?
It strikes me as odd that they would so consistently not work and
still be shipped if the problem also occured on Windows.
wk> To develop a workaround for the readers with non-updatable
wk> firmware, I need to talk with the vendor.
Do you know who to talk to?
I have developed some contacts with SCM because I am trying to
convince them to adopt a Free Software friendly policy and release all
their SmartCard drivers as Free Software -- so we could finally use
those PCMCIA readers, for instance.
wk> What _might_ help is to limit the packet size even further. In
wk> g10/ccid-driver.c, look for
wk> DEBUGOUT ("enabling workaround for buggy SCM readers\n");
handle-> max_ifsd = 48;
wk> and change the ifsd to 45.
Okay. Will try that, thanks.
Georg C. F. Greve <greve at fsfeurope.org>
Free Software Foundation Europe (http://fsfeurope.org)
Join the Fellowship and protect your freedom! (http://www.fsfe.org)
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