diff --git a/lib/asn1/asn1-common.h b/lib/asn1/asn1-common.h
new file mode 100644
index 000000000..0e56a20aa
--- /dev/null
+++ b/lib/asn1/asn1-common.h
@@ -0,0 +1,16 @@
+/* $Id$ */
+
+#include <stddef.h>
+#include <time.h>
+
+#ifndef __asn1_common_definitions__
+#define __asn1_common_definitions__
+
+typedef struct octet_string {
+    size_t length;
+    void *data;
+} octet_string;
+
+typedef char *general_string;
+
+#endif