Re-connection with paired device is failing

[Karry]

Hi. I am using KDE connect 1.4.0 (Kubuntu 20.10) and Sailfish connect build from source (today) on SFOS 4.0.1.45. When I pair with my notebook, everything works fine. But when I terminate applicatin on the phone or restart the phone or connection just lost, it is not able to connect again. KDE daemon just prints error about certificate:

$ LC_ALL=C /usr/lib/x86_64-linux-gnu/libexec/kdeconnectd --replace 
kdeconnect.core: Disconnecting due to fatal SSL Error:  "The issuer certificate of a locally looked up certificate could not be found"
kdeconnect.core: Disconnecting due to fatal SSL Error:  "No certificates could be verified"

I need to unpair devices and pair them every time...

[Karry]

Interesting, problem disappeared when I removed old configuration...

mv  .config/harbour-sailfishconnect .config/harbour-sailfishconnect.backup

Should I investigate more deeper? Do you have some suspect?

[R1tschY]

I fixed it yesterday with 81a6d82. Can you please check if you are using the latest version?
Please remove all *.pem files in .config/harbour-sailfishconnect before testing.

The problem is that the certificate is generated with wrong information. When problem occurs a second time please attach the .config/harbour-sailfishconnect/certifacte.pem file or check it on your own: openssl x509 -in certificate.pem -text -noout should contain CA:TRUE, pathlen:0 in output.

[Karry]

Yes, it is working... (with old configuration, but without key and certificate)

So, same problem will have everyone that will upgrade from 0.5.1 to 0.6.0, right? It would be great to have some code for migration, or at least mention it in changelog...

[R1tschY]

It should work with an upgrade from 0.5.1, because the problem is only the generation of the certificate. It was broken after 0.5.1 when I migrated to use kdeconnect-kde as submodule.

[Karry]

Great. Thank you for explanation :-)