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#!/usr/bin/env python3
#
# Copyright (C) 2020 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""Unittests for parsing files in zip64 format"""
import os
import subprocess
import tempfile
import unittest
import zipfile
import time
class Zip64Test(unittest.TestCase):
@staticmethod
def _WriteFile(path, size_in_kib):
contents = b'X' * 1024
with open(path, 'wb') as f:
for i in range(size_in_kib):
f.write(contents)
@staticmethod
def _AddEntriesToZip(output_zip, entries_dict=None):
contents = b'X' * 1024
for name, size in entries_dict.items():
# Need to pass a ZipInfo with a file_size
# to .open() so that it adds the Zip64 header
# on larger files
info = zipfile.ZipInfo(name)
info.file_size = size * 1024
with output_zip.open(info, mode='w') as f:
for i in range(size):
f.write(contents)
def _getEntryNames(self, zip_name):
cmd = ['ziptool', 'zipinfo', '-1', zip_name]
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
output, _ = proc.communicate()
self.assertEqual(0, proc.returncode)
self.assertNotEqual(None, output)
return output.decode('utf-8').split()
def _ExtractEntries(self, zip_name):
with tempfile.TemporaryDirectory() as temp_dir:
cmd = ['ziptool', 'unzip', '-d', temp_dir, zip_name]
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
proc.communicate()
self.assertEqual(0, proc.returncode)
def test_entriesSmallerThan2G(self):
with tempfile.NamedTemporaryFile(suffix='.zip') as zip_path:
# Add a few entries with each of them smaller than 2GiB. But the entire zip file is larger
# than 4GiB in size.
with zipfile.ZipFile(zip_path, 'w', allowZip64=True) as output_zip:
entry_dict = {'a.txt': 1025 * 1024, 'b.txt': 1025 * 1024, 'c.txt': 1025 * 1024,
'd.txt': 1025 * 1024, 'e.txt': 1024}
self._AddEntriesToZip(output_zip, entry_dict)
read_names = self._getEntryNames(zip_path.name)
self.assertEqual(sorted(entry_dict.keys()), sorted(read_names))
self._ExtractEntries(zip_path.name)
def test_largeNumberOfEntries(self):
with tempfile.NamedTemporaryFile(suffix='.zip') as zip_path:
entry_dict = {}
# Add 100k entries (more than 65535|UINT16_MAX).
for num in range(0, 100 * 1024):
entry_dict[str(num)] = 50
with zipfile.ZipFile(zip_path, 'w', allowZip64=True) as output_zip:
self._AddEntriesToZip(output_zip, entry_dict)
read_names = self._getEntryNames(zip_path.name)
self.assertEqual(sorted(entry_dict.keys()), sorted(read_names))
self._ExtractEntries(zip_path.name)
def test_largeCompressedEntriesSmallerThan4G(self):
with tempfile.NamedTemporaryFile(suffix='.zip') as zip_path:
with zipfile.ZipFile(zip_path, 'w', compression=zipfile.ZIP_DEFLATED,
allowZip64=True) as output_zip:
# Add entries close to 4GiB in size. Somehow the python library will put the (un)compressed
# sizes in the extra field. Test if our ziptool should be able to parse it.
entry_dict = {'e.txt': 4095 * 1024, 'f.txt': 4095 * 1024}
self._AddEntriesToZip(output_zip, entry_dict)
read_names = self._getEntryNames(zip_path.name)
self.assertEqual(sorted(entry_dict.keys()), sorted(read_names))
self._ExtractEntries(zip_path.name)
def test_forceDataDescriptor(self):
with tempfile.NamedTemporaryFile(suffix='.txt') as file_path:
self._WriteFile(file_path.name, 5000 * 1024)
with tempfile.NamedTemporaryFile(suffix='.zip') as zip_path:
with zipfile.ZipFile(zip_path, 'w', allowZip64=True) as output_zip:
pass
# The fd option force writes a data descriptor
cmd = ['zip', '-fd', zip_path.name, file_path.name]
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
proc.communicate()
read_names = self._getEntryNames(zip_path.name)
self.assertEqual([file_path.name[1:]], read_names)
self._ExtractEntries(zip_path.name)
def test_largeUncompressedEntriesLargerThan4G(self):
with tempfile.NamedTemporaryFile(suffix='.zip') as zip_path:
with zipfile.ZipFile(zip_path, 'w', compression=zipfile.ZIP_STORED,
allowZip64=True) as output_zip:
# Add entries close to 4GiB in size. Somehow the python library will put the (un)compressed
# sizes in the extra field. Test if our ziptool should be able to parse it.
entry_dict = {'g.txt': 5000 * 1024, 'h.txt': 6000 * 1024}
self._AddEntriesToZip(output_zip, entry_dict)
read_names = self._getEntryNames(zip_path.name)
self.assertEqual(sorted(entry_dict.keys()), sorted(read_names))
self._ExtractEntries(zip_path.name)
def test_largeCompressedEntriesLargerThan4G(self):
with tempfile.NamedTemporaryFile(suffix='.zip') as zip_path:
with zipfile.ZipFile(zip_path, 'w', compression=zipfile.ZIP_DEFLATED,
allowZip64=True) as output_zip:
# Add entries close to 4GiB in size. Somehow the python library will put the (un)compressed
# sizes in the extra field. Test if our ziptool should be able to parse it.
entry_dict = {'i.txt': 4096 * 1024, 'j.txt': 7000 * 1024}
self._AddEntriesToZip(output_zip, entry_dict)
read_names = self._getEntryNames(zip_path.name)
self.assertEqual(sorted(entry_dict.keys()), sorted(read_names))
self._ExtractEntries(zip_path.name)
if __name__ == '__main__':
unittest.main(verbosity=2)
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