using a smartcard without keytocard
mailinglisten at hauke-laging.de
Mon Mar 22 05:11:36 CET 2010
I have just bought a gnupg smartcard, copied my subkeys to it, and it works. I
have been using a key on several computers. Now I want the other systems to
use the smartcard, too, so that I can delete the private keys there. The
content of the smartcard is shown by --card-status and I could even use the
authentication key for an SSH connection.
For SSH connections gpg-agent looks at tha smartcard by default but it does
not for normal key lookup. I just get an error message (something like "no
private key found") if I delete the private keys.
Is there an "official" way to tell gpg to use the smartcard? Anything except
copying the keys to the card again (executing keytocard on all systems)?
I had the idea that exporting the secret keys on the system which initialized
the smartcard might work. But for convenience I decided not to use the
smartcard at home so I imported the secret keys there...
BTW: Does it make sense that the smartcard number is stored with the secret
key stub after the keytocard command? I haven't tried but I guess that copying
the same key to another card wouldn't work.
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