File name length validation etc

* Added some overrun checks for numeric calculations in CDBuilder. Ref: #20
LTRData · Nov 23, 2024 · c1408cc · c1408cc
1 parent eb1def3
commit c1408cc
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Showing 6 changed files with 214 additions and 188 deletions.
diff --git a/Library/DiscUtils.Iso9660/BuildDirectoryInfo.cs b/Library/DiscUtils.Iso9660/BuildDirectoryInfo.cs
@@ -100,7 +100,7 @@ internal uint GetPathTableEntrySize(Encoding enc)
     {
         var nameBytes = enc.GetByteCount(PickName(null, enc));
 
-        return (uint)(8 + nameBytes + ((nameBytes & 0x1) == 1 ? 1 : 0));
+        return checked((uint)(8 + nameBytes + ((nameBytes & 0x1) == 1 ? 1 : 0)));
     }
 
     internal int Write(Span<byte> buffer, Dictionary<BuildDirectoryMember, uint> locationTable, Encoding enc)