fix OverflowError when parsing System.DateTime with DateTimeKind bits…

… set
malwarefrank · Oct 7, 2024 · fac90ac · fac90ac
1 parent fcccdaf
commit fac90ac
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/dnfile/resource.py b/src/dnfile/resource.py
@@ -225,6 +225,9 @@ def type_str_to_type(self, type_name: str, data: bytes, offset: int) -> Tuple[Op
             tsize = 8
             final_bytes = data[offset:offset + tsize]
             x = struct.unpack("<q", final_bytes)[0]
+            # Value is stored in lower 62-bits
+            # https://github.com/dotnet/runtime/blob/17c55f1/src/libraries/System.Private.CoreLib/src/System/DateTime.cs#L130-L138
+            x = x & ((1 << 62) - 1)
             # https://stackoverflow.com/questions/3169517/python-c-sharp-binary-datetime-encoding
             secs = x / 10.0 ** 7
             delta = datetime.timedelta(seconds=secs)