Hi list,
I did search but did not find a useful answer to my question. In 2017
someone else asked:
During generating the keys on the GnuPG card, one can (and should)
create some backup of the secret key into a file. It is totally
unclear to me how to make something usefull out of this file, for
example import it into a "normal" secret keyring to use it in case of
the GnuPG card gets lost.
The discussion that followed explained how to create another CARD based
key from the backup. That is NOT my concern, I know how to do this.
Thus, I'd like to put this more specifically:
I want to no longer use a card (e.g. in order to be able to read old
messages on a mobile device, or in Thunderbird 78.2.1 WITHOUT the use of
GnuPG) but want to use the OLD CARD KEY.
I did create the key "on card"* (with --card-edit/admin/generate, NOT as
plain file and then with --keytocard). I do have a private_stub.gpg,
pubkey.gpg and sk_xxx.gpg.
*As I read in the above thread, the code actually generates the key as a
file, writes out a backup file and transfers it to the card. So maybe
I'd rather have used file based creation+backup-my-key+keytocard in the
first place, but I did not.
My question: Now that I have the above three files (and a working card
with the secret key on it), how can I use these to create a plain file
based private+public keypair from it?
Regards
Olav
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