-extern void md5_init(md5_ctxt *);
-extern void md5_loop(md5_ctxt *, const u_int8_t *, u_int);
-extern void md5_pad(md5_ctxt *);
-extern void md5_result(u_int8_t *, md5_ctxt *);
+static void md5_init(md5_ctxt *);
+static void md5_loop(md5_ctxt *, const u_int8_t *, u_int);
+static void md5_pad(md5_ctxt *);
+static void md5_result(u_int8_t *, md5_ctxt *);