AES encryption

Hey MKers,

I need to get an AES encryption going with a manually inputed key.
I'm sending data from an MKR1000 to a C++ server i made and, unfortunately, i can't seem to get the SSL working (it works on the Arduino but crashes my server), so i figured i'd get an AES encryption going. Only thing is that i have no idea how to even get started.

I've checked out a couple libraries but none of them seem to be working on the MKR.
Could anyone help me with this endeavor?
Thank you