mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-15 22:30:42 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

bpo-38256: Fix binascii.crc32 large input. (GH-32000) (GH-32013) (GH-32015)

Browse source 
Inputs >= 4GiB to `binascii.crc32(...)` when compiled to use the zlib
crc32 implementation (the norm on POSIX) no longer return the wrong
result.

(cherry picked from commit 4c989e19c8)
This commit is contained in:
Gregory P. Smith 2022-03-20 23:34:45 -07:00 • committed by GitHub
parent 4aa8b80251
commit 58a7e13037
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
3 changed files with 27 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

10
Lib/test/test_binascii.py
View file

@ -5,6 +5,8 @@ import binascii
import array
import re
from test import support
from test.support import bigmemtest, _1G, _4G, warnings_helper
# Note: "*_hex" functions are aliases for "(un)hexlify"
b2a_functions = ['b2a_base64', 'b2a_hex', 'b2a_hqx', 'b2a_qp', 'b2a_uu',
@ -448,6 +450,14 @@ class BytearrayBinASCIITest(BinASCIITest):
class MemoryviewBinASCIITest(BinASCIITest):
type2test = memoryview
class ChecksumBigBufferTestCase(unittest.TestCase):
"""bpo-38256 - check that inputs >=4 GiB are handled correctly."""
@bigmemtest(size=_4G + 4, memuse=1, dry_run=False)
def test_big_buffer(self, size):
data = b"nyan" * (_1G + 1)
self.assertEqual(binascii.crc32(data), 1044521549)
if __name__ == "__main__":
unittest.main()