[qtnetwork] Replace SSL verification error locks #11
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This pull request should solve QTBUG-76157 by removing the mutex-based error list and instead attaching the error list to either the X509_STORE or SSL struct as
ex_data
.I couldn't get the Qt unit tests working, but I have tested this on my device with a small application that I wrote for connecting with servers with known bad SSL certificates and it seems to work as before.
Additionally, my own app Sailfin, does no longer freeze when connecting over HTTPS, so it does solve the problem for me.
I only have tested this on Sailfish 4.4.0.68. I assumed keeping support for older OpenSSL versions than 1.1.0 wasn't necessary, therefore building with older versions than 1.1.0 may fail. Please let me know if that would be an issue.
Related forum topic: https://forum.sailfishos.org/t/possibility-of-backporting-qt-bug-fixes/11424