How to use TLS 1.0 with Python 3.8?

Question

I have a code that connects with Jira using jira module.
Unfortunately Jira server only supports SSLv3 and TLS1 .
I know they are old protocols , host will accept new ones before the end of this year.
But until there I need my python code to connect on Jira using TLS1 .

With Python 3.6 it worked fine, but with Python 3.8 it doesn't work, it shows me the error message below.

Python 3.8.2 (default, Apr 27 2020, 15:53:34) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from jira import JIRA
>>> import urllib3
>>> urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
>>> 
>>> options = {"server": "https://jira.mycompany.com/", "verify": False}
>>> jira = JIRA(options, auth=("user", "pass"))
WARNING:root:HTTPSConnectionPool(host='jira.mycompany.com', port=443): Max retries exceeded with url: /rest/auth/1/session (Caused by SSLError(SSLError(1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1108)'))) while doing POST https://jira.mycompany.com/rest/auth/1/session [{'data': '{"username": "user", "password": "pass"}', 'headers': {'User-Agent': 'python-requests/2.23.0', 'Accept-Encoding': 'gzip, deflate', 'Accept': 'application/json,*.*;q=0.9', 'Connection': 'keep-alive', 'Cache-Control': 'no-cache', 'Content-Type': 'application/json', 'X-Atlassian-Token': 'no-check'}}]
WARNING:root:Got ConnectionError [HTTPSConnectionPool(host='jira.mycompany.com', port=443): Max retries exceeded with url: /rest/auth/1/session (Caused by SSLError(SSLError(1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1108)')))] errno:None on POST https://jira.mycompany.com/rest/auth/1/session
{'response': None, 'request': <PreparedRequest [POST]>}\{'response': None, 'request': <PreparedRequest [POST]>}
WARNING:root:Got recoverable error from POST https://jira.mycompany.com/rest/auth/1/session, will retry [1/3] in 7.597192960254091s. Err: HTTPSConnectionPool(host='jira.mycompany.com', port=443): Max retries exceeded with url: /rest/auth/1/session (Caused by SSLError(SSLError(1, '[SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1108)')))

I already checked and OpenSSL supports TLS1 .

$ openssl s_client -help 2>&1  > /dev/null | egrep "\-(ssl|tls)[^a-z]"
 -ssl_config val            Use specified configuration file
 -tls1                      Just use TLSv1
 -tls1_1                    Just use TLSv1.1
 -tls1_2                    Just use TLSv1.2
 -tls1_3                    Just use TLSv1.3
 -ssl_client_engine val     Specify engine to be used for client certificate operations

Using only requests it gives me the same result.

python3 -c "import requests; requests.get('https://jira.mycompany.com/')"
Traceback (most recent call last):
  File "/home/lazize/repos/myproj/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 670, in urlopen
    httplib_response = self._make_request(
  File "/home/lazize/repos/myproj/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 381, in _make_request
    self._validate_conn(conn)
  File "/home/lazize/repos/myproj/venv/lib/python3.8/site-packages/urllib3/connectionpool.py", line 976, in _validate_conn
    conn.connect()
  File "/home/lazize/repos/myproj/venv/lib/python3.8/site-packages/urllib3/connection.py", line 361, in connect
    self.sock = ssl_wrap_socket(
  File "/home/lazize/repos/myproj/venv/lib/python3.8/site-packages/urllib3/util/ssl_.py", line 377, in ssl_wrap_socket
    return context.wrap_socket(sock, server_hostname=server_hostname)
  File "/usr/lib/python3.8/ssl.py", line 500, in wrap_socket
    return self.sslsocket_class._create(
  File "/usr/lib/python3.8/ssl.py", line 1040, in _create
    self.do_handshake()
  File "/usr/lib/python3.8/ssl.py", line 1309, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: UNSUPPORTED_PROTOCOL] unsupported protocol (_ssl.c:1108)

How can I use Python 3.8 with TLS1 ?

Answer 1

I solved the issue installing python package below.
In this way it installed pyOpenSSL .

Let me quote documentation:

If you install urllib3 with the secure extra, all required packages for certificate verification will be installed.

pip install urllib3[secure]

If I understood correct Python comes with its own implementation of SSL via module ssl .
Installing urllib3 in this way it will force Python to use OpenSSL implementation via pyOpenSSL .