Thanks for answering. I see there are some options using the CLI but of course those aren't friendly to normal users. I can't understand why it's not been implemented in a GUI already.
Guess that if you need something like that, you need to do it yourself. I asked for it to Key Chain devs but they showed no interest.
I will pick the thread of your mention about Wax library when I have some time to stop by.
Cheers