reduce scanner client fingerprints

mylib/grdp/protocol/t125/gcc/gcc.go

@@ -10,7 +10,6 @@ import (
 	"fmt"
 	"io"
 	"math/big"
-	"os"
 
 	"github.com/shadow1ng/fscan/mylib/grdp/glog"
 
@@ -255,9 +254,7 @@ type ClientCoreData struct {
 }
 
 func NewClientCoreData() *ClientCoreData {
-	name, _ := os.Hostname()
 	var ClientName [32]byte
-	copy(ClientName[:], core.UnicodeEncode(name)[:])
 	return &ClientCoreData{
 		RDP_VERSION_5_PLUS, 1280, 800, RNS_UD_COLOR_8BPP,
 		RNS_UD_SAS_DEL, US, 3790, ClientName, KT_IBM_101_102_KEYS,

mylib/grdp/protocol/t125/gcc/gcc_test.go

@@ -0,0 +1,13 @@
+package gcc
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestClientCoreDataDoesNotExposeClientName(t *testing.T) {
+	data := NewClientCoreData()
+	if !bytes.Equal(data.ClientName[:], make([]byte, len(data.ClientName))) {
+		t.Fatalf("client name is not empty: %x", data.ClientName)
+	}
+}