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- According to ZIP spec, both uncompressed and compressed size should be 0xffffffff when zip64 is used.
This commit is contained in:
Danny Lin 2025-05-29 01:15:52 +08:00
parent 81a419aaf7
commit c62a4556ff
1 changed files with 2 additions and 5 deletions
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7
Lib/zipfile/__init__.py
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@ -1619,14 +1619,11 @@ def _validate_local_file_entry(self, fp, offset, end_offset):
# According to the spec, these fields should be zero when data
# descriptor is used. Otherwise treat as a false positive on
# random bytes to return early, as scanning for data descriptor
# is rather intensive.
# is rather expensive.
if not (zinfo.CRC == zinfo.compress_size == zinfo.file_size == 0):
return None
zip64 = (
fheader[_FH_UNCOMPRESSED_SIZE] == 0xffffffff or
fheader[_FH_COMPRESSED_SIZE] == 0xffffffff
)
zip64 = fheader[_FH_UNCOMPRESSED_SIZE] == 0xffffffff
dd = self._scan_data_descriptor(fp, pos, end_offset, zip64)
if dd is None and not self.strict_descriptor: