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bpo-36993: Improve error reporting for zipfiles with bad zip64 extra data. (GH-14656)

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Daniel Hillier 2019-10-29 18:24:18 +11:00 • committed by Serhiy Storchaka
parent 4c155f738d
commit da6ce58dd5
3 changed files with 236 additions and 0 deletions
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12
Lib/zipfile.py
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@ -480,14 +480,26 @@ class ZipInfo (object):
# ZIP64 extension (large files and/or large archives)
if self.file_size in (0xffffffffffffffff, 0xffffffff):
if len(counts) <= idx:
raise BadZipFile(
"Corrupt zip64 extra field. File size not found."
)
self.file_size = counts[idx]
idx += 1
if self.compress_size == 0xFFFFFFFF:
if len(counts) <= idx:
raise BadZipFile(
"Corrupt zip64 extra field. Compress size not found."
)
self.compress_size = counts[idx]
idx += 1
if self.header_offset == 0xffffffff:
if len(counts) <= idx:
raise BadZipFile(
"Corrupt zip64 extra field. Header offset not found."
)
old = self.header_offset
self.header_offset = counts[idx]
idx+=1