# Use Nginx to directly serve ACME challenge responses using the # provided snippet # bind the webserver to the default listening address sed -i 's|^listen\s*=|#&|' /etc/lacme/lacme.conf DEBIAN_FRONTEND="noninteractive" apt install -y --no-install-recommends apache2 curl ln -fs /etc/lacme/apache2-static.conf /etc/apache2/conf-available/lacme.conf a2enmod proxy_http a2enconf lacme mkdir /run/apache2 ( set +eux && . /etc/apache2/envvars && apache2 ) # 'challenge-directory' set to a non-existent directory sed -ri 's|^#?challenge-directory\s*=.*|challenge-directory = /var/www/acme-challenge|' /etc/lacme/lacme.conf ! lacme newOrder 2>"$STDERR" || fail grepstderr -Fqx "opendir(/var/www/acme-challenge): No such file or directory" # ensure that requests to the root URI and challenge URIs respectively yield 403 Forbidden (no index) and 404 Not Found install -o_lacme-client -gwww-data -m0750 -d /var/www/acme-challenge rv="$(curl -w"%{http_code}" -so/dev/null http://127.0.0.1/.well-known/acme-challenge/)"; [ $rv -eq 403 ] rv="$(curl -w"%{http_code}" -so/dev/null http://127.0.0.1/.well-known/acme-challenge/foo)"; [ $rv -eq 404 ] # 'challenge-directory' set to a non-empty directory touch /var/www/acme-challenge/.stamp ! lacme newOrder 2>"$STDERR" || fail grepstderr -Fqx "Error: Refusing to use non-empty challenge directory /var/www/acme-challenge" rm -f /var/www/acme-challenge/.stamp lacme --debug newOrder 2>"$STDERR" || fail test /etc/lacme/simpletest.rsa.crt -nt /etc/lacme/simpletest.rsa.key ngrepstderr -Fq "Forking ACME webserver" grepstderr -Fq "Using existing webserver on /var/www/acme-challenge" grepstderr -Fq "Forking lacme-accountd, child PID " grepstderr -Fq "Forking /usr/libexec/lacme/client, child PID " grepstderr -Fq "Shutting down lacme-accountd" ngrepstderr -Fq "Shutting down ACME webserver" ngrepstderr -Eq "Incoming connection( from \S+)?: GET /\.well-known/acme-challenge/\S+ HTTP/[0-9.]+$" # ensure apache2 was indeed used to serve challenge responses (Let's Encrypt caches validation results) grep -E "\"GET /\.well-known/acme-challenge/\S+ HTTP/[0-9.]+\" 200 .* \(([^)]+; )*Let's Encrypt validation server(; [^)]+)*\)\"$" \ /var/log/apache2/access.log # vim: set filetype=sh :