}

        byte[] mac = PacMac.calculateMacArcfourHMACMD5(usage, makeKey(keybytes, 23), bytes);
        checkBytes(javaChecksum, mac);
        checkBytes(Hex.decode(expect), mac);
    }


    /**
     * @param keybytes
     * @return
     */
    private static KerberosKey makeKey ( byte[] keybytes, int etype ) {
        return new KerberosKey(null, keybytes, etype, 0);
    }

    }


    /**
     * @return the number of known usages
     */
    protected long getUsageCount () {
        return this.usageCount.get();
    }


    protected abstract long makeKey ( Request request ) throws IOException;


    protected abstract Long peekKey () throws IOException;


    protected abstract void doSend ( Request request ) throws IOException;

            in.close();
            socket.close();
        } finally {
            digest = null;
            socket = null;
            tconHostName = null;
        }
    }

    protected void makeKey( Request request ) throws IOException {
        /* The request *is* the key */
        if (++mid == 32000) mid = 1;
        ((ServerMessageBlock)request).mid = mid;
    }

	)

	type (
		makeReg struct {
			size    int64
			wantStr string
		}
		makeSparse struct {
			makeReg makeReg
			sph     sparseHoles
			size    int64
		}
		fileMaker any // makeReg | makeSparse
	)

	vectors := []struct {
		maker fileMaker
		tests []testFnc
	}{{
		maker: makeReg{0, ""},
		tests: []testFnc{
			testRemaining{0, 0},

	)

	type (
		makeReg struct {
			str  string
			size int64
		}
		makeSparse struct {
			makeReg makeReg
			spd     sparseDatas
			size    int64
		}
		fileMaker any // makeReg | makeSparse
	)

	vectors := []struct {
		maker fileMaker
		tests []testFnc
	}{{
		maker: makeReg{"", 0},
		tests: []testFnc{
			testRemaining{0, 0},