expose hdb_interface_version

lib/hdb/hdb.c

@@ -59,7 +59,7 @@
  *
  */
 
-
+const int hdb_interface_version = HDB_INTERFACE_VERSION;
 
 static struct hdb_method methods[] = {
 #if HAVE_DB1 || HAVE_DB3

lib/hdb/hdb.h

@@ -246,6 +246,8 @@ struct hdb_method {
     krb5_error_code (*create)(krb5_context, HDB **, const char *filename);
 };
 
+extern const int hdb_interface_version;
+
 #include <hdb-protos.h>
 
 #endif /* __HDB_H__ */

lib/hdb/version-script.map

@@ -68,6 +68,7 @@ HEIMDAL_HDB_1.0 {
 		hdb_value2entry_alias;
 		hdb_write_master_key;
 		length_hdb_keyset;
+		hdb_interface_version;
 
 		hdb_kt_ops;