Get OpenPGP subkeyid used for authentication

[Joke de Buhr]

Hi,

is there a way to query the OpenPGP subkey used for authentication?

The Certificate used for authentication can be retrieved on the remote side via 
gnutls_certificate_get_peers() but the preferred subkey information isn't set 
on the remote side. I can't find any function to query subkey information.

Since is it possible to specify different subkeys used for authentication the 
remote side should be able to retrieve information about the subkey being used 
to check if this specific subkey hasn't been revoked.


regards
Joke

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