antagonist-acme.sh

#!/bin/bash

##### Fill out the following #####
# Your domains
domain="example.com"
additional_domains="www.$domain" # colon-separated (:)
# DirectAdmin login
user="debXXX"
password=""
# For Let's Encrypt notifications
email="admin@example.com"
##################################

acme_client_version="v0.2.10"
acme_data_dir="$HOME/acme-data"
acme_cert_dir="$acme_data_dir/certs/acme-v01.api.letsencrypt.org.directory/$domain"
html_dir="$HOME/domains/$domain/public_html"
if [ -z $additional_domains ]
then
	acme_domains="$domain"
else
	acme_domains="$domain:$additional_domains"
fi

function setup () {
	echo "##### downloading acme-client #####"
	wget https://github.com/kelunik/acme-client/releases/download/$acme_client_version/acme-client.phar
	chmod +x ./acme-client.phar

	echo "##### running acme-client setup #####"
	./acme-client.phar setup -s letsencrypt --storage $acme_data_dir --email $email || exit 1
}

function issue () {
	echo "##### obtaining certificate from Let's Encrypt #####"
	./acme-client.phar issue -s letsencrypt --storage $acme_data_dir -d $acme_domains -p $html_dir || exit 1

	cat $acme_cert_dir/key.pem $acme_cert_dir/fullchain.pem > everything.pem

	echo "##### uploading certificate to DirectAdmin #####"
	curl -k "https://localhost:2223/CMD_API_SSL" \
		--user "$user:$password" \
		--data-urlencode "domain=$domain" \
		--data-urlencode "action=save" \
		--data-urlencode "type=paste" \
		--data-urlencode "certificate@everything.pem" \
		|| exit 1

	rm everything.pem
	echo "##### done! #####"
}

case $1 in
	"setup")
		setup
	;;
	"issue")
		issue
	;;
	*)
		if [ ! -x "./acme-client.phar" ] || [ ! -d "$acme_data_dir" ]
		then
			setup
		fi
		issue
	;;
esac

Jij absolute baas. Dank hiervoor!