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gpg: Allow import of PGP desktop exported secret keys.

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* 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: 4392
Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 5205512fc0)
This commit is contained in:
Werner Koch 2019-03-18 13:07:14 +01:00
parent 43b23aa82b
commit 0e73214dd2
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
3 changed files with 309 additions and 81 deletions
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3
g10/main.h
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@ -374,7 +374,8 @@ struct impex_filter_parm_s
const char *impex_filter_getval (void *cookie, const char *propname);
gpg_error_t transfer_secret_keys (ctrl_t ctrl, struct import_stats_s *stats,
kbnode_t sec_keyblock, int batch, int force);
kbnode_t sec_keyblock, int batch, int force,
int only_marked);
int collapse_uids( KBNODE *keyblock );