--- /dev/null
+#ifndef _IPXE_RANDOM_NZ_H
+#define _IPXE_RANDOM_NZ_H
+
+/** @file
+ *
+ * HMAC_DRBG algorithm
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+
+extern int get_random_nz ( void *data, size_t len );
+
+#endif /* _IPXE_RANDOM_NZ_H */