Not knowing much about Serbian smartcards, but I had done quite a bit with smartcards in Linux before.
Have you seen this project? https://github.com/ubavic/bas-celik … looks to be cross-platform and do what you’re saying. Though you’d probably need pcscd, pcsc-tools, and possibly other similar packages, depending distro.







Ah if you want to use it on their website or in a browser you’ll probably also need a mini card driver like OpenSC.
And if you’re using firefox, you might have to go into settings to add a pkcs provider and tell it where
opensc-pkcs11.sois.There’s lots of generic info out there on smartcards in Linux if you were so inclined to “figure it out”…but I don’t blame them for not “supporting” Linux…that’s kind of a minefield.
Still, that’s the fun of Linux…realizing that “not supported” doesn’t mean it won’t work…just that they won’t help you.