Add SSL support

[beauremus]

Here's an HTTPS implementation that seems like it could be useful for our socket communications.
https://chaobin.github.io/2015/07/22/a-working-understanding-on-SSL-and-HTTPS-using-python/

[beauremus]

If this post can be believed this is a one-line change after importing the SSL module. This would be a good first issue.
https://stackoverflow.com/questions/26851034/opening-a-ssl-socket-connection-in-python

[potap75]

I'll take it, please!

[rneswold]

Thanks for volunteering, @potap75 !

[potap75]

What should I use as an upstream master? v1.0.0rc6 ?

[beauremus]

Yes. That's correct.

[potap75]

thank you!

[potap75]

I keep getting: "fatal: branch 'master' does not exist"

[potap75]

When I'm trying to setup a branch in PyCharm: git branch --set-upstream-to=upstream/v1.0.0rc6

[beauremus]

Yes. Branch master doesn't exist. The branches are labeled by major version so you want v1.x.

[rneswold]

Strange. We set v1.x to be the default branch so, when you check it out, I would have thought you would get that branch.

[potap75]

This is what I get when I try to set a branch:

[potap75]

Anyways. Maybe I can contribute directly here:

import socket
import ssl

hostname = ''
context = ssl.create_default_context()

with socket.create_connection((hostname, 443)) as sock:
    with context.wrap_socket(sock, server_hostname=hostname) as ssock:
        print(ssock.version())

EDIT: Code highlighting

[rneswold]

Thank you for the contribution, @potap75.

We're using the async features of Python3 so our TCP socket is hidden in the Transport class. Looking at the 3.10 documentation, I see there's a chance that the asyncio library supports SSL sockets, if we choose the proper set-up options. Hopefully this also works for 3.6.

UPDATE: It looks like we can do something like this:

con_fut = loop.create_connection(lambda: self,
                                 host='acsys-proxy.fnal.gov',
                                 port=self.port,
                                 ssl=True)

[rneswold]

e56b8d6 is the proposed change.

We're getting sslv3 handshake errors but, when I point the Python script to a non-DPM SSL server, this code connects. So @charlieking65 and I think it's a config issue on the proxy.