How do I install asleap tool in Ubuntu?

I compiled this software successfully on Ubuntu 18.04 LTS with

sudo apt-get install git build-essential libssl-dev libpcap-dev

cd ~/Downloads
https://github.com/joswr1ght/asleap
cd asleep
make

For your information: its Makefile does not contain install procedure.

So after compilation you can use executables directly by ./asleap and ./genkeys.