How is it possible to export the wpa_supplicant.conf from tablet?

My tablet is connect to a wifi requiring EAP method, phase 2 authentification, login+password and proxy. and It works well. The thing is i want to do the same for a RPi, but I don't know how to provide it with these wifi infos. Thus, I'd need to export the wpa_supplicant.conf it use it on my RPi. Note : I can't root my tablet. How would it be possible? Thank you (please be explicite, I don't master this field very well)