[Distutils] Announcement: TLSv1.2 will become mandatory in thefuture

Steve Dower steve.dower at python.org
Thu Jan 12 00:30:46 EST 2017

"I don’t think it’s a particularly big deal to tie the tls module to the Python lifecycle though"

I'd hope that the API of this module is stable enough and the native part of the implementation is OS-specific enough that we may not even need to update it that often. (I'm advocating very strongly for just using the OS APIs to implement it, and those don't change often enough for us to need to worry.)

The Linux builds can link to OpenSSL, but there shouldn't be anything requiring OpenSSL for this module, so the update timeframe is totally different. But I've now joined security-sig, which is where the discussion seems to be, so I'll stop designing things here :)

Top-posted from my Windows Phone

-----Original Message-----
From: "Donald Stufft" <donald at stufft.io>
Sent: ‎1/‎11/‎2017 19:48
To: "Nick Coghlan" <ncoghlan at gmail.com>
Cc: "DistUtils mailing list" <distutils-sig at python.org>
Subject: Re: [Distutils] Announcement: TLSv1.2 will become mandatory in thefuture

On Jan 11, 2017, at 10:40 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:

On 12 January 2017 at 13:00, Donald Stufft <donald at stufft.io> wrote:

This doesn’t work well because it’s not something that pip is going to be
able to upgrade on Windows, because the .so will be locked when pip imports
it on Windows and we won’t be able to uninstall it to do an upgrade. We had
to disable the automatic use of pyOpenSSL for this reason too. The only C
stuff that pip can reliably use is the standard library.

Ugh, I'd completely forgotten about that limitation of Windows filesystems.

And the main alternatives I can think of involve copying files around
as pip starts up, which would be unacceptably slow for a command line
app :(

I don’t think it’s a particularly big deal to tie the tls module to the Python lifecycle though, we’ve got a precident for PEPs that backport important security critical stuff and most things are presumably going to be things that we don’t really even need a backport or a PEP for (I’m thinking things like ciphers and such). Particularly if this new thing is documented up front clearly what things you can depend on for compatibility (api and such) and what things can change in minor releases (keeping up with the security joneses stuff).

I think the big thing that really killed the ssl module for so long in Python was the 2.x vs 3.x split with 2.7 living for a _very_ long time, and then no culture of back porting security important changes to it.

Donald Stufft
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