[New-bugs-announce] [issue42200] Support TLS 1.3 half-closed connections

[Dima Tisnek]

New submission from Dima Tisnek <dimaqq at gmail.com>:

(apologies if this was raised before, I couldn't find it in bugs, mailing lists or discourse).
(also apologies if I misunderstood something about the protocol)

Up to an including TLS 1.2, a single close notify terminates both upstream and downstream; Starting with TLS 1.3 there are separate close notify alerts for upstream and downstream.

This means that it's possible to have a TLS connection in half-closed state, e.g. to send "GET / HTTP xx; close notify" and then wait for the server response.

Today, that's not possible, at least in asyncio, as evidenced by https://bugs.python.org/issue39951 
(I did not check synchronous wrapped sockets)

----------
assignee: christian.heimes
components: SSL
messages: 379908
nosy: Dima.Tisnek, christian.heimes
priority: normal
severity: normal
status: open
title: Support TLS 1.3 half-closed connections
type: enhancement
versions: Python 3.10

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42200>
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