gpgsm: Add a way to save a found state.

* kbx/keybox-defs.h (keybox_found_s): New.
(keybox_handle): Factor FOUND out to above.  Add saved_found.
* kbx/keybox-init.c (keybox_release): Release saved_found.
(keybox_push_found_state, keybox_pop_found_state): New.

* sm/keydb.c (keydb_handle): Add field saved_found.
(keydb_new): Init it.
(keydb_push_found_state, keydb_pop_found_state): New.

3 files changed, 42 insertions, 7 deletions

diff --git a/kbx/keybox-defs.h b/kbx/keybox-defs.h
index f79c093fd..7bbcf83cf 100644
--- a/kbx/keybox-defs.h
+++ b/kbx/keybox-defs.h
@@ -85,6 +85,14 @@ struct keybox_name
 };
 
 
+struct keybox_found_s
+{
+  KEYBOXBLOB blob;
+  off_t offset;
+  size_t pk_no;
+  size_t uid_no;
+  unsigned int n_packets; /*used for delete and update*/
+};
 
 struct keybox_handle {
   CONST_KB_NAME kb;
@@ -93,13 +101,8 @@ struct keybox_handle {
   int eof;
   int error;
   int ephemeral;
-  struct {
-    KEYBOXBLOB blob;
-    off_t offset;
-    size_t pk_no;
-    size_t uid_no;
-    unsigned int n_packets; /*used for delete and update*/
-  } found;
+  struct keybox_found_s found;
+  struct keybox_found_s saved_found;
   struct {
     char *name;
     char *pattern;
diff --git a/kbx/keybox-init.c b/kbx/keybox-init.c
index d3299412a..8ae3ec315 100644
--- a/kbx/keybox-init.c
+++ b/kbx/keybox-init.c
@@ -148,6 +148,7 @@ keybox_release (KEYBOX_HANDLE hd)
           hd->kb->handle_table[idx] = NULL;
     }
   _keybox_release_blob (hd->found.blob);
+  _keybox_release_blob (hd->saved_found.blob);
   if (hd->fp)
     {
       fclose (hd->fp);
@@ -159,6 +160,35 @@ keybox_release (KEYBOX_HANDLE hd)
 }
 
 
+/* Save the current found state in HD for later retrieval by
+   keybox_restore_found_state.  Only one state may be saved.  */
+void
+keybox_push_found_state (KEYBOX_HANDLE hd)
+{
+  if (hd->saved_found.blob)
+    {
+      _keybox_release_blob (hd->saved_found.blob);
+      hd->saved_found.blob = NULL;
+    }
+  hd->saved_found = hd->found;
+  hd->found.blob = NULL;
+}
+
+
+/* Restore the saved found state in HD.  */
+void
+keybox_pop_found_state (KEYBOX_HANDLE hd)
+{
+  if (hd->found.blob)
+    {
+      _keybox_release_blob (hd->found.blob);
+      hd->found.blob = NULL;
+    }
+  hd->found = hd->saved_found;
+  hd->saved_found.blob = NULL;
+}
+
+
 const char *
 keybox_get_resource_name (KEYBOX_HANDLE hd)
 {
diff --git a/kbx/keybox.h b/kbx/keybox.h
index 4c447a577..96c6db549 100644
--- a/kbx/keybox.h
+++ b/kbx/keybox.h
@@ -64,6 +64,8 @@ int keybox_is_writable (void *token);
 
 KEYBOX_HANDLE keybox_new (void *token, int secret);
 void keybox_release (KEYBOX_HANDLE hd);
+void keybox_push_found_state (KEYBOX_HANDLE hd);
+void keybox_pop_found_state (KEYBOX_HANDLE hd);
 const char *keybox_get_resource_name (KEYBOX_HANDLE hd);
 int keybox_set_ephemeral (KEYBOX_HANDLE hd, int yes);