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#1 2018-09-15 07:44:37

woodape
Member
Registered: 2015-03-25
Posts: 151

[SOLVED] SSL Error - self signed certificate

After the following upgrade:

[2018-09-14 15:54] [ALPM] upgraded openssl (1.1.0.i-1 -> 1.1.1-1)

Offlineimap stopped being able to connect to imap.gmail.com, with complaints about the SSL certificate. I tried installing isync and got:

SSL error connecting imap.gmail.com (64.233.166.108:993): self signed certificate

After downgrading the openssl package back down to 1.1.0.i-1 I was able to connect again.

Is it a security risk if I keep the downgraded openssl? Is this something Google needs to update, or does the new openssl package need some kind of fix?

Last edited by woodape (2018-09-16 05:55:16)

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#2 2018-09-15 11:01:02

loqs
Member
Registered: 2014-03-06
Posts: 11,029

Re: [SOLVED] SSL Error - self signed certificate

https://bugs.archlinux.org/task/60059
offlineimap does not support SNI which is required by gmail for TLS 1.3
Edit:
isync same issue should be fixed by https://sourceforge.net/p/isync/isync/c … 5790c05d27

Last edited by loqs (2018-09-15 11:05:53)

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#3 2018-09-15 18:58:54

jasonwryan
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From: .nz
Registered: 2009-05-09
Posts: 28,922
Website

Re: [SOLVED] SSL Error - self signed certificate

Another workaround is to replace sslcacertfile with cert_fingerprint.


Arch + dwm   •   Mercurial repos  •   Surfraw

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#4 2018-09-15 19:26:11

firecat53
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From: Lake Stevens, WA, USA
Registered: 2007-05-14
Posts: 1,529
Website

Re: [SOLVED] SSL Error - self signed certificate

I worked around this for now by adding

SSLVersions TLSv1.1

to my .mbsyncrc for each IMAP account.

Edit: I keep using Markdown syntax!

Last edited by firecat53 (2018-09-15 19:26:49)

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#5 2018-09-16 05:54:56

woodape
Member
Registered: 2015-03-25
Posts: 151

Re: [SOLVED] SSL Error - self signed certificate

firecat53 wrote:

I worked around this for now by adding

SSLVersions TLSv1.1

to my .mbsyncrc for each IMAP account.

This seems to work for me. Marking it solved. Thanks for the info everyone!

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#6 2018-09-16 06:37:56

jasonwryan
Anarchist
From: .nz
Registered: 2009-05-09
Posts: 28,922
Website

Re: [SOLVED] SSL Error - self signed certificate

IMO, a better option is to apply loqs' patch (on the bugtracker).


Arch + dwm   •   Mercurial repos  •   Surfraw

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#7 2018-09-16 09:33:38

woodape
Member
Registered: 2015-03-25
Posts: 151

Re: [SOLVED] SSL Error - self signed certificate

After installing isync and giving it a test-run, I think I actually like it better than offlineimap - it's a little easier on my CPU. But if I change my mind soon, and the patch isn't applied in the official package, I'll apply it myself. Thanks for the help, and thanks @loqs for doing the patch work!

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