gpg: Prepare for signatures with ISSUER_FPR but without ISSUER.

* g10/getkey.c (get_pubkey_for_sig): New.
(get_pubkeyblock_for_sig): New.
* g10/mainproc.c (issuer_fpr_raw): Give global scope.
(check_sig_and_print): Use get_pubkeyblock_for_sig.
* g10/pkclist.c (check_signatures_trust): Use get_pubkey_for_sig.
* g10/sig-check.c (check_signature2): Ditto.
(check_signature_over_key_or_uid): Ditto.
--

GnuPG-bug-id: 4046

The whole getkey stuff is still a mess with way to much duplication
and missing caching of already fetched data.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/g10/keydb.h b/g10/keydb.h
index bd156a6a3..ea0fa9ddd 100644
--- a/g10/keydb.h
+++ b/g10/keydb.h
@@ -283,6 +283,10 @@ void cache_public_key( PKT_public_key *pk );
 /* Disable and drop the public key cache.  */
 void getkey_disable_caches(void);
 
+/* Return the public key used for signature SIG and store it at PK.  */
+gpg_error_t get_pubkey_for_sig (ctrl_t ctrl,
+                                PKT_public_key *pk, PKT_signature *sig);
+
 /* Return the public key with the key id KEYID and store it at PK.  */
 int get_pubkey (ctrl_t ctrl, PKT_public_key *pk, u32 *keyid);
 
@@ -291,6 +295,10 @@ int get_pubkey (ctrl_t ctrl, PKT_public_key *pk, u32 *keyid);
    also only considers primary keys.  */
 int get_pubkey_fast (PKT_public_key *pk, u32 *keyid);
 
+/* Return the entire keyblock used to create SIG.  This is a
+ * specialized version of get_pubkeyblock.  */
+kbnode_t get_pubkeyblock_for_sig (ctrl_t ctrl, PKT_signature *sig);
+
 /* Return the key block for the key with KEYID.  */
 kbnode_t get_pubkeyblock (ctrl_t ctrl, u32 *keyid);