gpg: Allow import of PGP desktop exported secret keys.
* g10/import.c (NODE_TRANSFER_SECKEY): New. (import): Add attic kludge. (transfer_secret_keys): Add arg only_marked. (resync_sec_with_pub_keyblock): Return removed seckeys via new arg r_removedsecs. (import_secret_one): New arg r_secattic. Change to take ownership of arg keyblock. Implement extra secret key import logic. Factor some code out to ... (do_transfer): New. (import_matching_seckeys): New.
The PGP desktops exported secret keys are really stupid. And they
even a have kind of exception in rfc4880 which does not rule that
out (section 11.2):
[...] Implementations SHOULD include self-signatures on any user IDs and subkeys, as this allows for a complete public key to be automatically extracted from the transferable secret key. Implementations MAY choose to omit the self-signatures, especially if a transferable public key accompanies the transferable secret key.
Now if they would only put the public key before the secret
key. Anyway we now have a workaround for that ugliness.
- GnuPG-bug-id: T4392
- Signed-off-by: Werner Koch <firstname.lastname@example.org>