gpg: Avoid multiple open calls to the keybox file.

* g10/keydb.h (KEYDB_HANDLE): Move typedef to ...
* g10/gpg.h: here.
(struct server_control_s): Add field 'cached_getkey_kdb'.
* g10/gpg.c (gpg_deinit_default_ctrl): Release that keydb handle.
* g10/getkey.c (getkey_end): Cache keydb handle.
(get_pubkey): Use cached keydb handle.
* kbx/keybox-search.c (keybox_search_reset): Use lseek instead of
closing the file.
--

Before this patch a "gpg --check-sigs" opened and closed the keybox
file for almost every signature check.  By caching the keydb handle
and using lseek(2) this can be limited to just 2 times.  This might
speed up things on Windows.

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

1 files changed, 6 insertions, 1 deletions

diff --git a/g10/gpg.h b/g10/gpg.h
index c66358570..9b8b77ca0 100644
--- a/g10/gpg.h
+++ b/g10/gpg.h
@@ -59,10 +59,13 @@ struct server_local_s;
 struct dirmngr_local_s;
 typedef struct dirmngr_local_s *dirmngr_local_t;
 
-/* Object used to describe a keyblok node.  */
+/* Object used to describe a keyblock node.  */
 typedef struct kbnode_struct *KBNODE;   /* Deprecated use kbnode_t. */
 typedef struct kbnode_struct *kbnode_t;
 
+/* The handle for keydb operations.  */
+typedef struct keydb_handle *KEYDB_HANDLE;
+
 /* TOFU database meta object.  */
 struct tofu_dbs_s;
 typedef struct tofu_dbs_s *tofu_dbs_t;
@@ -94,6 +97,8 @@ struct server_control_s
     int batch_updated_wanted;
   } tofu;
 
+  /* This is used to cache a key data base handle.  */
+  KEYDB_HANDLE cached_getkey_kdb;
 };