[Bug 1861791] Re: Server incompatible with Focal clients

[Chris Knadle]

James Henstridge:
> I detailed the configuration file workaround here:
> 
> https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1856428/comments/2
> 
> I wonder if the underlying cause of the problem is that Bionic's Mumble
> is compiled against Qt 4, which predates the newer TLS versions.  I
> would have thought it'd get new versions automatically through new
> OpenSSL releases, but perhaps there is some incompatibility in there.

Mumble uses Qt's SSL library, and there are differences in the Qt SSL library
between Qt 4 and 5.  Mumble 1.3 with Qt 5 is capable of TLS that have perfect
forward secrecy, but Mumble 1.2 with Qt 4 is not, and that's independent of the
particular versions of OpenSSL that are used.  i.e. this isn't a limitation of
the OpenSSL version, it's a limitation of the SSL library in Qt 4.

  -- Chris

-- 
Chris Knadle
Chris.Knadle at coredump.us

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https://bugs.launchpad.net/bugs/1861791

Title:
  Server incompatible with Focal clients

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