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bpo-30594: Add a test for bad IDNA in ssl server_hostname #1997

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Merged
vstinner merged 1 commit into from
Jun 9, 2017
Merged

bpo-30594: Add a test for bad IDNA in ssl server_hostname #1997

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10 changes: 10 additions & 0 deletions 10 Lib/test/test_ssl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1393,6 +1393,16 @@ def test_subclass(self):
# For compatibility
self.assertEqual(cm.exception.errno, ssl.SSL_ERROR_WANT_READ)

def test_bad_idna_in_server_hostname(self):
# Note: this test is testing some code that probably shouldn't exist
# in the first place, so if it starts failing at some point because
# you made the ssl module stop doing IDNA decoding then please feel
# free to remove it. The test was mainly added because this case used
# to cause memory corruption (see bpo-30594).
ctx = ssl.create_default_context()
with self.assertRaises(UnicodeError):
ctx.wrap_bio(ssl.MemoryBIO(), ssl.MemoryBIO(),
server_hostname="xn--.com")

class MemoryBIOTests(unittest.TestCase):

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