smartcards and GPGME

[Andre Heinecke]

Hi,

On Sunday, May 13, 2018 6:26:04 PM CEST Jacob Adams wrote:
> As part of a program I'm writing this summer for GSoC, I'd like to be
> able to both move gpg private keys to a smartcard and generate keys on
> the smartcard from an application. While this can be done from gpg, it
> doesn't look like I can do so from GPGME or any other wrappers that
> exist. Have I missed something or is this simply not possible yet?
> 
> While I could wrap this functionality of gpg, I'd really prefer not to
> and I'd rather not drop the user to a gpg prompt if I don't have to.

This is both pretty complicated thorugh GPGME, as there is indeed not a direct 
interface. Kleopatra and GPA use the "AssuanEngine" of GPGME to connect to the 
gpg-agent's assuan interface and issue / parse commands directly through that 
connection.

You might want to take a look at GPA's implementation:

https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpa.git;a=blob;f=src/cm-openpgp.c

Alternatively instead of wrapping gpg (and using the complicated edit 
interface) you could also wrap "gpg-connect-agent" and issue commands to 
scdaemon through that.

Best Regards,
Andre

-- 
Andre Heinecke |  ++49-541-335083-262  | http://www.intevation.de/
Intevation GmbH, Neuer Graben 17, 49074 Osnabrück | AG Osnabrück, HR B 18998
Geschäftsführer: Frank Koormann, Bernhard Reiter, Dr. Jan-Oliver Wagner
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 228 bytes
Desc: This is a digitally signed message part.
URL: <https://lists.gnupg.org/pipermail/gnupg-users/attachments/20180514/bca18f5d/attachment.sig>