[Interest] Win:TLS error/OSX:backward compatibility

[Alexander Carôt]

> That warning is printed when you try to use one of the QSslSocket functions 
> that require OpenSSL and the OpenSSL libraries are not found.
> 
> Make sure QSslSocket::supportSsl() returns true. You have to ship the OpenSSL 
> 1.1 libraries yourself, they are not part of Qt, not even of the pre-built 
> binaries.


Allright - will do so.


> > 2.) In order to provide backward compatibility on OSX I am typically
> > providing two versions: 10.15 and 10.14 are being compiled with the recent
> > version of Qt. This binary launches with 10.13 but throws an errors about
> > missing symbols in libSystem.B.dylib
> 
> Are you sure you built Qt with a minimum target version of 10.13?

My pro-File contains:

QMAKE_MAC_SDK = macosx10.15
QMAKE_CFLAGS_RELEASE   = "-mmacosx-version-min=10.13"
QMAKE_CXXFLAGS_RELEASE = "-mmacosx-version-min=10.13" 

 
> Qt 5.9 cannot do SSL/TLS in 2020 outside of a Mac. You must upgrade to 5.10 at 
> a minimum. On a Mac, because Qt has used SecureTransport for years, it can 
> work. But it could have issues I am not aware of.


OK - thanks for sharing this info !


> Either way, Apple stopped supporting 10.12 last year.


So - I believe I should use 10.13 as the lowest supported version.

 
> > Can anyone send me hint how to provide backward compatibility at least to
> > 10.13 (fixing the symbol issue) or lower (fixing the SSL issue) ?
> 
> You didn't say what symbols they were.

Sorry - this is the one which was reported most of the time:

__chkstd_darwin

There might be others but this would be a good starting point.

Best

Alex



> -- 
> Thiago Macieira - thiago.macieira (AT) intel.com
>   Software Architect - Intel DPG Cloud Engineering
> 
> 
> 
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> 

--
http://www.carot.de
Email : Alexander at Carot.de
Tel.: +49 (0)177 5719797


> Gesendet: Sonntag, 02. August 2020 um 19:31 Uhr
> Von: "Thiago Macieira" <thiago.macieira at intel.com>
> An: interest at qt-project.org
> Betreff: Re: [Interest] Win:TLS error/OSX:backward compatibility
>
> On Saturday, 1 August 2020 00:13:21 PDT Alexander Carôt wrote:
> > Hello all,
> > 
> > my software's websocket server is now running in secure mode including
> > certificate integration. This works great apart from two details.
> > 
> > 1.) On some Windows machines I get the following error:
> > 
> > qt.network.ssl: QSslSocket::startServerEncryption: TLS initialization failed
> > 
> > I believe there are some missing libs on these machine but I am not sure how
> > to resolve this issue conveniently.
> 
> That warning is printed when you try to use one of the QSslSocket functions 
> that require OpenSSL and the OpenSSL libraries are not found.
> 
> Make sure QSslSocket::supportSsl() returns true. You have to ship the OpenSSL 
> 1.1 libraries yourself, they are not part of Qt, not even of the pre-built 
> binaries.
> 
> > 2.) In order to provide backward compatibility on OSX I am typically
> > providing two versions: 10.15 and 10.14 are being compiled with the recent
> > version of Qt. This binary launches with 10.13 but throws an errors about
> > missing symbols in libSystem.B.dylib
> 
> Are you sure you built Qt with a minimum target version of 10.13?
> 
> > For 10.12 and lower I am compiling my app with Qt version 5.9 which works a
> > usual but the new encryption calls obviously don't. With this version the
> > SSL handshake between browser and app fails.
> 
> Qt 5.9 cannot do SSL/TLS in 2020 outside of a Mac. You must upgrade to 5.10 at 
> a minimum. On a Mac, because Qt has used SecureTransport for years, it can 
> work. But it could have issues I am not aware of.
> 
> Either way, Apple stopped supporting 10.12 last year.
> 
> > Can anyone send me hint how to provide backward compatibility at least to
> > 10.13 (fixing the symbol issue) or lower (fixing the SSL issue) ?
> 
> You didn't say what symbols they were.
> 
> -- 
> Thiago Macieira - thiago.macieira (AT) intel.com
>   Software Architect - Intel DPG Cloud Engineering
> 
> 
> 
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> https://lists.qt-project.org/listinfo/interest
>