Validate serialized resource data format when writing

0xd4d · Jul 10, 2023 · 451e8f9 · 451e8f9
1 parent e636c16
commit 451e8f9
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/DotNet/Resources/UserResourceData.cs b/src/DotNet/Resources/UserResourceData.cs
@@ -1,5 +1,6 @@
 // dnlib: See LICENSE.txt for more info
 
+using System;
 using System.IO;
 using System.Runtime.Serialization;
 using dnlib.IO;
@@ -68,6 +69,8 @@ public BinaryResourceData(UserResourceType type, byte[] data, SerializationForma
 
 		/// <inheritdoc/>
 		public override void WriteData(ResourceBinaryWriter writer, IFormatter formatter) {
+			if (writer.ReaderType == ResourceReaderType.ResourceReader && Format != SerializationFormat.BinaryFormatter)
+				throw new NotSupportedException();
 			if (writer.ReaderType == ResourceReaderType.DeserializingResourceReader) {
 				writer.Write7BitEncodedInt((int)format);
 				writer.Write7BitEncodedInt(data.Length);