void testComputeResponse_basic() {
        // Arrange
        byte[] key = hex("0102030405060708090A0B0C0D0E0F10");
        byte[] serverChallenge = hex("1122334455667788");
        byte[] clientData = hex("A0A1A2A3A4");

        // Act
        byte[] result = NtlmUtil.computeResponse(key, serverChallenge, clientData, 0, clientData.length);

        // Assert: result = mac(16) + clientData