+ copy4(buf+120, m->totalN);
+ /*
+ * Prior to protocol version 27 only the number of bits
+ * modulo 2^32 was included. MD4 requires the number
+ * of bits modulo 2^64, which was fixed starting with
+ * protocol version 27.
+ */
+ if (protocol_version >= 27) {
+ copy4(buf+124, m->totalN2);
+ }