[New-bugs-announce] [issue33808] ssl.get_server_certificate fails with openssl 1.1.0 but works with 1.0.2g for self-signed certificate

[Dev Sanghani]

New submission from Dev Sanghani <devsanghani at gmail.com>:

Output from Python3.5 with OpenSSL 1.0.2g:
>>> ssl.get_server_certificate(('mail.mani.pt', 993), ssl.PROTOCOL_TLSv1)
'-----BEGIN CERTIFICATE-----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\nCDU+vO9t1YN3WpXeRZfKWLw/qEE8b65H\n-----END CERTIFICATE-----\n'

Output from Python3.6 with OpenSSL 1.1.0:
>>> ssl.get_server_certificate(('mail.mani.pt', 993), ssl.PROTOCOL_TLSv1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.6/ssl.py", line 1223, in get_server_certificate
    with context.wrap_socket(sock) as sslsock:
  File "/usr/lib/python3.6/ssl.py", line 407, in wrap_socket
    _context=self, _session=session)
  File "/usr/lib/python3.6/ssl.py", line 814, in __init__
    self.do_handshake()
  File "/usr/lib/python3.6/ssl.py", line 1068, in do_handshake
    self._sslobj.do_handshake()
  File "/usr/lib/python3.6/ssl.py", line 689, in do_handshake
    self._sslobj.do_handshake()
OSError: [Errno 0] Error

----------
assignee: christian.heimes
components: SSL
messages: 319059
nosy: christian.heimes, dsanghan
priority: normal
severity: normal
status: open
title: ssl.get_server_certificate fails with openssl 1.1.0 but works with 1.0.2g for self-signed certificate
type: crash
versions: Python 3.6

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33808>
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