first build on Linux: OpenSSL issue

[mzimmers]

@JoeCFD nothing.

[JoeCFD]

@mzimmers ldd your app

[mzimmers]

@JoeCFD I did:

mzimmers@LinuxBoxZimmers:~/QtProjects/build-NgaIcdFw-Desktop_Qt_6_5_3_GCC_64bit-Debug$ ldd appNgaIcdFw | grep libssl
mzimmers@LinuxBoxZimmers:~/QtProjects/build-NgaIcdFw-Desktop_Qt_6_5_3_GCC_64bit-Debug$ 

[JoeCFD]

@mzimmers no need. The Qt plugin has issue. Not your code.

[mzimmers]

@JoeCFD which plugin are you referring to?

[JoeCFD]

@mzimmers
Qt has a plugin libqopensslbackend.so in under gcc_64/plugins/tls. But I can see the direct link to libssl.

Anyway, libssl.so -> libssl.so.1.1 softlink always points to libssl.so.1.1.
I guess if you softlink libssl.so to libssl3.so, the problem may be gone. However, other packages in your system may be affected if they use 1.1.

[mzimmers]

@JoeCFD said in first build on Linux: OpenSSL issue:

Qt has a plugin libqopensslbackend.so in under gcc_64/plugins/tls. But I can see the direct link to libssl.

And this plugin links to version 1.1 of OpenSSL? Or is this because of the link in my /usr/lib/x86_64-linux-gnu folder?

I'd prefer to eliminate the error message, but not at the expense of breaking other applications in the system.

[JoeCFD]

@mzimmers Which Qt modules are you using? I ran a few Qt 6.6 network examples and could not see your issue.

[mzimmers]

@JoeCFD

Qt 6.5.3
Desktop gcc 64-bit
WebAssembly (single-threaded)
Android
Sources
Qt HTTP Server (TP)
Qt Virtual Keyboard
Qt WebSockets

Thanks...

[SGaist]

How come you have both OpenSSL 3 and 1.1 ?

How did you install them ?

[JoeCFD]

@mzimmers I have two in my computer as well. But my libssl points to libssl.so.3 and openssl version shows OpenSSL 3.0.2.

Maybe you can try to reinstall it.
sudo apt-get reinstall openssl
and then run
openssl version
to see if you have the right version

[mzimmers]

@JoeCFD still points to 1.1. shrug

I suppose I could manually relink it, but I'm not sure about the side effects.

[mzimmers]

@SGaist I have no idea - this is how the system came to me. The only real change my IT department made was to install some anti-virus application; maybe that used the older version of openssl?

[JoeCFD]

@mzimmers anti-virus application in Linux? I do not have any. But I know Linux viruses indeed exist.

I have libssl.so.3. You seem not having it.
run
sudo synaptic
Search for libssl
to see if you have installed libssl-dev
If not, install it. This one has version 3.0.2.

[mzimmers]

@JoeCFD I believe I do have it:

mzimmers@LinuxBoxZimmers:~/Downloads$ whereis libssl
libssl: /usr/lib/x86_64-linux-gnu/libssl.so /usr/lib/x86_64-linux-gnu/libssl3.so /usr/lib/x86_64-linux-gnu/libssl.a
mzimmers@LinuxBoxZimmers:~/Downloads$ cd /usr/lib/x86_64-linux-gnu/
mzimmers@LinuxBoxZimmers:/usr/lib/x86_64-linux-gnu$ ls -l libssl*
-rw-r--r-- 1 root root  382024 Feb 17  2023 libssl3.so
-rw-r--r-- 1 root root 1016494 Oct 10 02:03 libssl.a
lrwxrwxrwx 1 root root      13 Oct 10 02:03 libssl.so -> libssl.so.1.1
-rw-r--r-- 1 root root  598104 Oct 10 02:03 libssl.so.1.1
mzimmers@LinuxBoxZimmers:/usr/lib/x86_64-linux-gnu$ 

The link just happens to be pointing to my older version. I don't know why.

[JoeCFD]

@mzimmers you do not have libssl.so.3 while you have libssl3.so.

[mzimmers]

@JoeCFD oops...good catch.

[JoeCFD]

@mzimmers
the latest ssl version is 3.0.2 in Jammy 22.04
https://launchpad.net/ubuntu/jammy/+source/openssl
I guess you need to upgrade your Ubuntu.

[mzimmers]

@JoeCFD what output do you get when you run this command:

ls -l /usr/lib/x86_64-linux-gnu/libssl*

And, since it appears that I have an older version of openssl, how do I go about removing the old version without disrupting the rest of my system?

[JoeCFD]

@mzimmers

-rw-r--r-- 1 root root  418464 Feb 17  2023 /usr/lib/x86_64-linux-gnu/libssl3.so
-rw-r--r-- 1 root root 1231268 Feb  6  2023 /usr/lib/x86_64-linux-gnu/libssl.a
lrwxrwxrwx 1 root root      11 Feb  6  2023 /usr/lib/x86_64-linux-gnu/libssl.so -> libssl.so.3
-rw-r--r-- 1 root root  598104 Feb  6  2023 /usr/lib/x86_64-linux-gnu/libssl.so.1.1
-rw-r--r-- 1 root root  667864 Feb  6  2023 /usr/lib/x86_64-linux-gnu/libssl.so.3

my libssl.so is linked to libssl.so.3. Maybe try to upgrade your Ubuntu. I have the old version as well. If you can not get the new version with Ubuntu upgrade, try to install openssl with Qt installation tool. There you can install openssl 3.0.