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bpo-34922: Fix integer overflow in the digest() and hexdigest() methods (GH-9751)

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for the SHAKE algorithm in the hashlib module.
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Serhiy Storchaka 2018-10-11 07:41:00 +03:00 • committed by GitHub
parent f1aa8aed4a
commit 9b8c2e7676
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13
Lib/test/test_hashlib.py
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@ -230,6 +230,19 @@ class HashLibTestCase(unittest.TestCase):
self.assertIsInstance(h.digest(), bytes)
self.assertEqual(hexstr(h.digest()), h.hexdigest())
def test_digest_length_overflow(self):
# See issue #34922
large_sizes = (2**29, 2**32-10, 2**32+10, 2**61, 2**64-10, 2**64+10)
for cons in self.hash_constructors:
h = cons()
if h.name not in self.shakes:
continue
for digest in h.digest, h.hexdigest:
self.assertRaises(ValueError, digest, -10)
for length in large_sizes:
with self.assertRaises((ValueError, OverflowError)):
digest(length)
def test_name_attribute(self):
for cons in self.hash_constructors:
h = cons()