Ubuntu 22.04 with Qt 6.3.0 and OpenSSL

[imironchik]

On Ubuntu 22.04 OpenSSL installed version is 3, that is not compatible with pre-built Qt binaries. I have installed OpenSSL 1.1 with Qt installer. But I have question: how can I say Qt to load OpenSSL from custom directory?

[imironchik]

LD_LIBRARY_PATH solves the problem.

[XaviP]

I have installed OpenSSL 1.1 with Qt Maintenance Tool, but I don't find which path has to be added to LD_LIBRARY_PATH. @imironchik can you be more explicit?

[SGaist]

@XaviP hi and welcome to devnet,

You need to add the path to the folder containing the OpenSSL libraries.

[XaviP]

I've tried with:
export LD_LIBRARY_PATH=/home/my_user/Documents/Qt/Tools/OpenSSL/
checked with:
echo $LD_LIBRARY_PATH
start qtcreator, rebuild and run, but not working yet.

I've tried too with:
export LD_LIBRARY_PATH=/home/my_user/Documents/Qt/Tools/OpenSSL/src/
export LD_LIBRARY_PATH=/home/my_user/Documents/Qt/Tools/OpenSSL/src/ssl/
even with:
sudo ldconfig
after every export, but not working yet.

[edit]
the opposite way:
export LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/libssl.so.3
doesn’t work either.

[jsulm]

@XaviP Which folder contains the SSL libraries (*.so files)?
Also, if it does not work when running the app from QtCreator you need to update PATH in Run configuration of your project in QtCreator.

[XaviP]

• After installing OpenSSL 1.1, I have SSL libraries at /usr/local/lib/libssl.so
  (the original system ones (ssl3) are at /usr/lib/x86_64-linux-gnu/libssl.so)
• The error, among others, when running the app from qtcreator is:
  "qt.tlsbackend.ossl: Incompatible version of OpenSSL (built with OpenSSL 1.x, runtime version is >= 3.x)"
• So I need to update Run configuration of the project, but I don't understand how. I've tried with "Environment", adding LD_LIBRARY_PATH=usr/local/lib/libssl.so, with no results.

[jsulm]

@XaviP said in Ubuntu 22.04 with Qt 6.3.0 and OpenSSL:

LD_LIBRARY_PATH=usr/local/lib/libssl.so, with no results.

This is wrong - you add folders to that path (and you also forgot / at the beginning of the path):

LD_LIBRARY_PATH=/usr/local/lib

[XaviP]

Yes, now it's solved. Thank you very much!

[PatG]

@XaviP This worked for me...

Download libssl1.1_1.1.1f-1ubuntu2_amd64.deb from official repository:
wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.deb

Install it:
sudo dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.deb

[keksi venksi]

@PatG thanks, This helped me