Re: Problem: cannot generate / copy keys larger than 1024bit on my OpenPGP-compatible card

Branko Majic branko at
Sun Jun 3 16:46:59 CEST 2012

Well, OmniKey is famous for not working with stock libccid and extended apdus. I had such problems with the OpenSC pkcs#11 and pcscd. Can you try smaller key sizes (never worked with OpenPGP, but it "solved" the issue for me - using 1k keys instead of 2k)

Robin Kipp <mlists at> wrote:

>Hi Werner,
>Am 03.06.2012 um 12:29 schrieb Werner Koch:
>> What reader are you using?  It is possible that your reader does not
>> support extended length APDUs, which are required for v2 cards.
>Hmmm, very interesting. I'm using an OMNIKEY 6121 USB card reader,
>which I purchased along with my OpenGPG-compatible card. Since the
>retailer where I bought it ( offers quite a few card
>readers, I even made sure to contact them about which reader I should
>choose beforehand, so that I wouldn't end up with anything that was
>incompatible... Also, I just made sure to check out their website once
>again to have another look at the reader's specs, however unfortunately
>I wasn't able to find anything OpenPGP-specific on there...
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