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.

2 files changed, 56 insertions, 0 deletions

diff --git a/sm/keydb.c b/sm/keydb.c
index 845ebba88..d9eb2e073 100644
--- a/sm/keydb.c
+++ b/sm/keydb.c
@@ -56,6 +56,7 @@ static int used_resources;
 struct keydb_handle {
   int locked;
   int found;
+  int saved_found;
   int current;
   int is_ephemeral;
   int used; /* items in active */
@@ -265,6 +266,7 @@ keydb_new (int secret)
 
   hd = xcalloc (1, sizeof *hd);
   hd->found = -1;
+  hd->saved_found = -1;
 
   assert (used_resources <= MAX_KEYDB_RESOURCES);
   for (i=j=0; i < used_resources; i++)
@@ -476,6 +478,58 @@ unlock_all (KEYDB_HANDLE hd)
   hd->locked = 0;
 }
 
+
+
+/* Push the last found state if any.  */
+void
+keydb_push_found_state (KEYDB_HANDLE hd)
+{
+  if (!hd)
+    return;
+
+  if (hd->found < 0 || hd->found >= hd->used)
+    {
+      hd->saved_found = -1;
+      return;
+    }
+
+  switch (hd->active[hd->found].type)
+    {
+    case KEYDB_RESOURCE_TYPE_NONE:
+      break;
+    case KEYDB_RESOURCE_TYPE_KEYBOX:
+      keybox_push_found_state (hd->active[hd->found].u.kr);
+      break;
+    }
+
+  hd->saved_found = hd->found;
+  hd->found = -1;
+}
+
+
+/* Pop the last found state.  */
+void
+keydb_pop_found_state (KEYDB_HANDLE hd)
+{
+  if (!hd)
+    return;
+
+  hd->found = hd->saved_found;
+  hd->saved_found = -1;
+  if (hd->found < 0 || hd->found >= hd->used)
+    return;
+
+  switch (hd->active[hd->found].type)
+    {
+    case KEYDB_RESOURCE_TYPE_NONE:
+      break;
+    case KEYDB_RESOURCE_TYPE_KEYBOX:
+      keybox_pop_found_state (hd->active[hd->found].u.kr);
+      break;
+    }
+}
+
+
 
 /*
   Return the last found object.  Caller must free it.  The returned
diff --git a/sm/keydb.h b/sm/keydb.h
index 6e432f893..aec31c399 100644
--- a/sm/keydb.h
+++ b/sm/keydb.h
@@ -43,6 +43,8 @@ gpg_error_t keydb_get_flags (KEYDB_HANDLE hd, int which, int idx,
                              unsigned int *value);
 gpg_error_t keydb_set_flags (KEYDB_HANDLE hd, int which, int idx,
                              unsigned int value);
+void keydb_push_found_state (KEYDB_HANDLE hd);
+void keydb_pop_found_state (KEYDB_HANDLE hd);
 int keydb_get_cert (KEYDB_HANDLE hd, ksba_cert_t *r_cert);
 int keydb_insert_cert (KEYDB_HANDLE hd, ksba_cert_t cert);
 int keydb_update_cert (KEYDB_HANDLE hd, ksba_cert_t cert);