Language doesn't matter
The only references I have is the rigol-to-hex mapping function in main.c, the valid character list, and some valid mapped keys as listed in this thread
edit: mostly done, I think I still have a bug, but I can't generate to test...same issue that I thought I read before (did alank2 delete it? he ruins the discussion), where seed does vary what I see in signed.ecs.
edit 2: don't know what I did while playing with it, now I can generate the sample listed here.
edit 3: hexkey to rigol key done. but ecsign still doesn't work for any other key/serial other than the demo posted earlier, with the seed posted earlier...