OpenPGP card and signing

Remco Post at
Wed Mar 15 00:29:00 CET 2006

Michael Bienia wrote:
> On 2006-03-14 08:23:58 +0100, Remco Post wrote:
>> Michael Bienia wrote:
>>> Hello,
>>> does signing with the OpenPGP card only work with SHA1 as digest-algo?
>>> With SHA1 and RIPEMD160 gpg asks for the PIN but only SHA1 generates a
>>> working signature. Trying RIPEMD160 I get:
>>> | gpg: checking created signature failed: bad signature
>>> | gpg: signing failed: bad signature
>>> | gpg: signing failed: bad signature
>> From the basiccard website I read that it only supports sha-1, so this
>> might be true. I noticed the same just recently.
> A friend who uses his OpenPGP card with enigmail under windows can
> successfully create a RIPEMD160 signature.
> I could also create one if I use gpg with pcscd.
> Can someone explain me, why it works if I use gpg with pcscd and not if
> I use gpg alone?

gpg alone means gpg with ccid I guess, this might indicate a difference
in implementation between the ccid and the pcsc parts of the
implementation, where the ccid part might not work as designed...

> Michael
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Met vriendelijke groeten,

Remco Post

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