[ostree] OstreeGpgVerifier: Don't add trustdb.gpg to the keyring list

[Matthew Barnes <mbarnes src gnome org>]

commit c4998ab33f7db752c176f6a0c6ead14f0bfffe9b
Author: Matthew Barnes <mbarnes redhat com>
Date:   Mon Mar 16 09:54:24 2015 -0400

    OstreeGpgVerifier: Don't add trustdb.gpg to the keyring list
    
    In case someone like me is mucking around in $OSTREE_GPG_HOME and
    accidentally creates a trust database there.

 src/libostree/ostree-gpg-verifier.c |   19 ++++++++++++++++---
 1 files changed, 16 insertions(+), 3 deletions(-)
---
diff --git a/src/libostree/ostree-gpg-verifier.c b/src/libostree/ostree-gpg-verifier.c
index da36011..c473892 100644
--- a/src/libostree/ostree-gpg-verifier.c
+++ b/src/libostree/ostree-gpg-verifier.c
@@ -409,6 +409,7 @@ _ostree_gpg_verifier_add_keyring_dir (OstreeGpgVerifier   *self,
     {
       GFileInfo *file_info;
       GFile *path;
+      const char *name;
 
       if (!gs_file_enumerator_iterate (enumerator, &file_info, &path,
                                        cancellable, error))
@@ -416,9 +417,21 @@ _ostree_gpg_verifier_add_keyring_dir (OstreeGpgVerifier   *self,
       if (file_info == NULL)
         break;
 
-      if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_REGULAR &&
-          g_str_has_suffix (g_file_info_get_name (file_info), ".gpg"))
-        self->keyrings = g_list_append (self->keyrings, g_object_ref (path));
+      if (g_file_info_get_file_type (file_info) != G_FILE_TYPE_REGULAR)
+        continue;
+
+      name = g_file_info_get_name (file_info);
+
+      /* Files with a .gpg suffix are typically keyrings except
+       * for trustdb.gpg, which is the GPG trust database. */
+
+      if (!g_str_has_suffix (name, ".gpg"))
+        continue;
+
+      if (g_str_equal (name, "trustdb.gpg"))
+        continue;
+
+      self->keyrings = g_list_append (self->keyrings, g_object_ref (path));
     }
 
   ret = TRUE;