Yubikey keytocard: "Bad secret key"

Valentin Cocaud v.cocaud at gmail.com
Mon Nov 4 15:36:35 CET 2019


On Feb 18, 2019; 12:09pm, Peter Lebbing wrote:
> Maybe it has stopped doing that now,
> and you need to do:
>
> $ gpg --card-edit
> [...]
> gpg> key-attr
>
> to select the desired key length before keytocard.
>
> At the moment, I don't have a version with key-attr at hand to quickly
> test myself.

Hi,

I have tested this for you with my Yubikey 5 NFC.
It worked like a charme. I can now move my 4096 RSA keys to my Yubikey
without any problem.

You have to enter in admin to enable `key-attr` command in the gpg console:

$ gpg --edit-card
gpg/card> admin
gpg/card> key-attr

Perhaps a more explicit error message could be a good thing.

Valentin.



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