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fix align check for 2019.4.x #364

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fix align check for 2019.4.x #364

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38c1018
specific version check of header _uses_block_alignment
AXiX-official Feb 14, 2026
3616e65
format
AXiX-official Feb 14, 2026
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15 changes: 4 additions & 11 deletions UnityPy/files/BundleFile.py
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Original file line number Diff line number Diff line change
Expand Up @@ -116,19 +116,12 @@ def read_fs(self, reader: EndianBinaryReader):
if self.dataflags & self.dataflags.UsesAssetBundleEncryption:
self.decryptor = ArchiveStorageManager.ArchiveStorageDecryptor(reader)

# check if we need to align the reader
# - align to 16 bytes and check if all are 0
# - if not, reset the reader to the previous position
if self.version >= 7:
# if header version is 7 or later we need to align the reader
# for 2019.4.15 and later, version should be 7 and aligned
# but some games in these versions somehow has version 6 while aligned
if self.version >= 7 or (version[0] == 2019 and version >= (2019, 4, 15)):
reader.align_stream(16)
self._uses_block_alignment = True
elif version >= (2019, 4):
pre_align = reader.Position
align_data = reader.read((16 - pre_align % 16) % 16)
if any(align_data):
reader.Position = pre_align
else:
self._uses_block_alignment = True

start = reader.Position
if self.dataflags & ArchiveFlags.BlocksInfoAtTheEnd: # kArchiveBlocksInfoAtTheEnd
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