code: def ReadIDsForAllSignedBinaries(self, cursor=None
                                   ):
      
      cursor.execute(
          "SELECT binary_type, binary_path FROM signed_binary_references")
      return [
          rdf_objects.SignedBinaryID(binary_type=binary_type, path=binary_path)
          for binary_type, binary_path in cursor.fetchall()
      ]
docs: Returns ids for all signed binaries in the DB.