[issue19500] ftplib: Add client-side SSL session resumption

[Lars Schellhas]

Lars Schellhas  added the comment:

@Christian Heimes, you are absolutely right. I'm sorry if I came off rude. 

Actually, I just had a rough day at work with the end of it being the 
realisation that this missing fix would solve my day-filling issue from today.

Furthermore, I've actually returned here, just to read through the whole thread 
again, hoping to find a way to contribute to it's resolution.
However, this is my first time contributing to Python, but I'm eager to learn 
and dive into the necessary resources.
Could you give me a hint about where to start?

--

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[issue19500] ftplib: Add client-side SSL session resumption

[Christian Heimes]

Christian Heimes  added the comment:

I have provided necessary infrastructure for TLS 1.2 session resumption in the 
ssl module a couple of releases ago. But nobody has taken ownership of this 
ftplib issue and provided a full fix with regression tests and documentation 
update.

If you like to see ftplib enhanced to support session resumption, please 
provide a PR with regression tests. Demanding a fix won't accelerate work on 
the issue.

--
stage: patch review -> needs patch
versions: +Python 3.10 -Python 3.8

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[issue19500] ftplib: Add client-side SSL session resumption

[Stephen Ash]

Change by Stephen Ash :


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nosy:  -Stephen Ash

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[issue19500] ftplib: Add client-side SSL session resumption

[Lars Schellhas]

Lars Schellhas  added the comment:

Excuse me, but why is this issue still open and unfixed? There are already 
proposed fixes and this issue has been around for nearly 7 years now. 
Filezilla has forwarded the responsibility to us for this issue 
(https://trac.filezilla-project.org/ticket/10700), so please, let's just fix it.

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nosy: +larsschellhas

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[issue19500] ftplib: Add client-side SSL session resumption

[Florian Wickert]

Florian Wickert  added the comment:

Using vsftpd 3.0.3 with ssl_enable=YES and require_ssl_reuse=YES I get the 
following error when I try to upload a file with conn.storbinary():

FTP command: Client "192.168.178.115", "STOR something.bin"
FTP response: Client "192.168.178.115", "150 Ok to send data."
FTP response: Client "x.x.x.x", "150 Ok to send data."
DEBUG: Client "x.x.x.x", "DATA connection terminated without SSL shutdown. 
Buggy client! Integrity of upload cannot be asserted."
FTP response: Client "x.x.x.x", "426 Failure reading network stream."

This also happens when SSL reuse is disabled on the server side.
Uploading with FileZilla works and there is basically no difference in the log 
until the error happens.

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nosy: +Florian Wickert

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[issue19500] ftplib: Add client-side SSL session resumption

[Christian Heimes]

Christian Heimes  added the comment:

It's now an ftplib issue.

It's too late to land a new feature in 3.7 because we have reached feature 
freeze.

--
assignee: christian.heimes -> 
components:  -Documentation, SSL
priority: high -> low
title: Add client-side SSL session resumption -> ftplib: Add client-side SSL 
session resumption
versions: +Python 3.8 -Python 3.6

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