pki: Check if the key is allowed against right list
Previously when generating the signature in server side the key was
checked against the wrong list, potentially making the server to select
the wrong algorithm to sign (e.g. rsa-sha2-512 instead of rsa-sha2-256).
Signed-off-by: Anderson Toshiyuki Sasaki <email@example.com>
Reviewed-by: Jakub Jelen <firstname.lastname@example.org>