8000 gh-117779: Fix reading duplicated entries in zipfile by name · python/cpython@c683cf7 · GitHub
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gh-117779: Fix reading duplicated entries in zipfile by name
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+31
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3 files changed

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‎Lib/test/test_zipfile/test_core.py

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Original file line numberDiff line numberDiff line change
@@ -2445,6 +2445,34 @@ def test_full_overlap(self):
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with self.assertRaisesRegex(zipfile.BadZipFile, 'File name.*differ'):
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zipf.read('b')
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@requires_zlib()
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def test_full_overlap_same_name(self):
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data = (
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b'PK\x03\x04\x14\x00\x00\x00\x08\x00\xa0lH\x05\xe2\x1e'
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b'8\xbb\x10\x00\x00\x00\t\x04\x00\x00\x01\x00\x00\x00a\xed'
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b'\xc0\x81\x08\x00\x00\x00\xc00\xd6\xfbK\\d\x0b`P'
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b'K\x01\x02\x14\x00\x14\x00\x00\x00\x08\x00\xa0lH\x05\xe2'
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b'\x1e8\xbb\x10\x00\x00\x00\t\x04\x00\x00\x01\x00\x00\x00\x00'
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b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00aPK'
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b'\x01\x02\x14\x00\x14\x00\x00\x00\x08\x00\xa0lH\x05\xe2\x1e'
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b'8\xbb\x10\x00\x00\x00\t\x04\x00\x00\x01\x00\x00\x00\x00\x00'
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b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00aPK\x05'
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b'\x06\x00\x00\x00\x00\x02\x00\x02\x00^\x00\x00\x00/\x00\x00'
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b'\x00\x00\x00'
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)
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with zipfile.ZipFile(io.BytesIO(data), 'r') as zipf:
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self.assertEqual(zipf.namelist(), ['a', 'a'])
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self.assertEqual(len(zipf.infolist()), 2)
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zi = zipf.getinfo('a')
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self.assertEqual(zi.header_offset, 0)
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self.assertEqual(zi.compress_size, 16)
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self.assertEqual(zi.file_size, 1033)
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self.assertEqual(len(zipf.read('a')), 1033)
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self.assertEqual(len(zipf.read(zi)), 1033)
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self.assertEqual(len(zipf.read(zipf.infolist()[1])), 1033)
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with self.assertRaisesRegex(zipfile.BadZipFile, 'Overlapped entries'):
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zipf.read(zipf.infolist()[0])
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@requires_zlib()
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def test_quoted_overlap(self):
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data = (

‎Lib/zipfile/__init__.py

Lines changed: 2 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1545,9 +1545,8 @@ def _RealGetContents(self):
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print("total", total)
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end_offset = self.start_dir
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for zinfo in sorted(self.filelist,
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key=lambda zinfo: zinfo.header_offset,
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reverse=True):
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for zinfo in reversed(sorted(self.filelist,
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key=lambda zinfo: zinfo.header_offset)):
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zinfo._end_offset = end_offset
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end_offset = zinfo.header_offset
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‎Misc/NEWS.d/next/Library/2025-01-24-12-30-38.gh-issue-117779.gADGXI.rst

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1 @@
1+
Fix reading duplicated entries in :mod:`zipfile` by name.

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