Prevent user with accessAnyName from change name

2 files changed, 84 insertions, 14 deletions

diff --git a/hotline/transaction_handlers.go b/hotline/transaction_handlers.go
index aa994b9..2a81768 100644
--- a/hotline/transaction_handlers.go
+++ b/hotline/transaction_handlers.go
@@ -1593,18 +1593,17 @@ func HandleUploadFile(cc *ClientConn, t *Transaction) (res []Transaction, err er
 }
 
 func HandleSetClientUserInfo(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-	var icon []byte
 	if len(t.GetField(fieldUserIconID).Data) == 4 {
-		icon = t.GetField(fieldUserIconID).Data[2:]
+		cc.Icon = t.GetField(fieldUserIconID).Data[2:]
 	} else {
-		icon = t.GetField(fieldUserIconID).Data
+		cc.Icon = t.GetField(fieldUserIconID).Data
+	}
+	if cc.Authorize(accessAnyName) {
+		cc.UserName = t.GetField(fieldUserName).Data
 	}
-	cc.Icon = icon
-	cc.UserName = t.GetField(fieldUserName).Data
 
 	// the options field is only passed by the client versions > 1.2.3.
 	options := t.GetField(fieldOptions).Data
-
 	if options != nil {
 		optBitmap := big.NewInt(int64(binary.BigEndian.Uint16(options)))
 		flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(cc.Flags)))
@@ -1623,14 +1622,16 @@ func HandleSetClientUserInfo(cc *ClientConn, t *Transaction) (res []Transaction,
 		}
 	}
 
-	// Notify all clients of updated user info
-	cc.sendAll(
-		tranNotifyChangeUser,
-		NewField(fieldUserID, *cc.ID),
-		NewField(fieldUserIconID, cc.Icon),
-		NewField(fieldUserFlags, cc.Flags),
-		NewField(fieldUserName, cc.UserName),
-	)
+	for _, c := range sortedClients(cc.Server.Clients) {
+		res = append(res, *NewTransaction(
+			tranNotifyChangeUser,
+			c.ID,
+			NewField(fieldUserID, *cc.ID),
+			NewField(fieldUserIconID, cc.Icon),
+			NewField(fieldUserFlags, cc.Flags),
+			NewField(fieldUserName, cc.UserName),
+		))
+	}
 
 	return res, err
 }
diff --git a/hotline/transaction_handlers_test.go b/hotline/transaction_handlers_test.go
index f283112..f43d45f 100644
--- a/hotline/transaction_handlers_test.go
+++ b/hotline/transaction_handlers_test.go
@@ -2887,3 +2887,72 @@ func TestHandleTranAgreed(t *testing.T) {
 		})
 	}
 }
+
+func TestHandleSetClientUserInfo(t *testing.T) {
+	type args struct {
+		cc *ClientConn
+		t  *Transaction
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantRes []Transaction
+		wantErr assert.ErrorAssertionFunc
+	}{
+		{
+			name: "when client does not have accessAnyName",
+			args: args{
+				cc: &ClientConn{
+					Account: &Account{
+						Access: func() *[]byte {
+							var bits accessBitmap
+							access := bits[:]
+							return &access
+						}(),
+					},
+					ID:       &[]byte{0, 1},
+					UserName: []byte("Guest"),
+					Flags:    []byte{0, 1},
+					Server: &Server{
+						Clients: map[uint16]*ClientConn{
+							uint16(1): {
+								ID: &[]byte{0, 1},
+							},
+						},
+					},
+				},
+				t: NewTransaction(
+					tranSetClientUserInfo, nil,
+					NewField(fieldUserIconID, []byte{0, 1}),
+					NewField(fieldUserName, []byte("NOPE")),
+				),
+			},
+			wantRes: []Transaction{
+				{
+					clientID:  &[]byte{0, 1},
+					Flags:     0x00,
+					IsReply:   0x00,
+					Type:      []byte{0x01, 0x2d},
+					ID:        []byte{0, 0, 0, 0},
+					ErrorCode: []byte{0, 0, 0, 0},
+					Fields: []Field{
+						NewField(fieldUserID, []byte{0, 1}),
+						NewField(fieldUserIconID, []byte{0, 1}),
+						NewField(fieldUserFlags, []byte{0, 1}),
+						NewField(fieldUserName, []byte("Guest"))},
+				},
+			},
+			wantErr: assert.NoError,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotRes, err := HandleSetClientUserInfo(tt.args.cc, tt.args.t)
+			if !tt.wantErr(t, err, fmt.Sprintf("HandleSetClientUserInfo(%v, %v)", tt.args.cc, tt.args.t)) {
+				return
+			}
+
+			tranAssertEqual(t, tt.wantRes, gotRes)
+		})
+	}
+}