# Remote accountd server process

adduser --disabled-password --shell /bin/sh \
       --home /home/lacme-account \
       --gecos "lacme account user" \
       --quiet lacme-account

chown lacme-account: /etc/lacme/account.key

DEBIAN_FRONTEND="noninteractive" apt install -y --no-install-recommends \
    openssh-client openssh-server
ssh-keygen -N "" -f ~root/.ssh/id_rsa

install -olacme-account -glacme-account -dm0700 ~lacme-account/.ssh
install -olacme-account -glacme-account -m0644 ~root/.ssh/id_rsa.pub ~lacme-account/.ssh/authorized_keys
{ echo -n "[127.0.0.1]:2222 "; cat /etc/ssh/ssh_host_rsa_key.pub; } >~root/.ssh/known_hosts

cat >/etc/ssh/sshd_config <<-EOF
	Port 2222
	ListenAddress 127.0.0.1
	ChallengeResponseAuthentication no
	PasswordAuthentication no
	UsePAM yes
EOF
install -oroot -groot -dm0755 /run/sshd
/usr/sbin/sshd

sed -ri 's|^#?command\s*=.*/lacme-accountd$|command = ssh -Tp2222 -llacme-account 127.0.0.1 lacme-accountd|' /etc/lacme/lacme.conf
sed -ri 's|^#?config\s*=.*|config = /etc/lacme/lacme-accountd.conf|' /etc/lacme/lacme.conf
lacme newOrder --debug 2>"$STDERR" || fail # intentionally use --debug, ssh should tunnel stdin + stdout + stderr
test /etc/lacme/simpletest.rsa.crt -nt /etc/lacme/simpletest.rsa.key

# and now with an authorized_keys(5) restriction
sed -ri "s|^[^#]|restrict,from=\"127.0.0.1\",command=\"/usr/bin/lacme-accountd --quiet --stdio\" &|" ~lacme-account/.ssh/authorized_keys
rm -vf /etc/lacme/simpletest.rsa.crt

! lacme newOrder 2>"$STDERR" || fail # --config= (and --debug) should be ignored
grepstderr -Fxq "Error: 'privkey' is not specified"
grepstderr -Fxq "[simpletest-rsa] Error: Couldn't issue X.509 certificate!"

install -olacme-account -glacme-account -Ddm0700 -- \
    ~lacme-account/.config/lacme ~lacme-account/.local/share/lacme
mv -t ~lacme-account/.config/lacme /etc/lacme/account.key
cat >~lacme-account/.config/lacme/lacme-accountd.conf <<-EOF
	privkey = file:%E/lacme/account.key
	logfile = %h/.local/share/lacme/accountd.log
EOF

lacme newOrder
test /etc/lacme/simpletest.rsa.crt -nt /etc/lacme/simpletest.rsa.key

# ensure signature requests are logged
grep -F "] SIGNED header=base64url({" ~lacme-account/.local/share/lacme/accountd.log

# vim: set filetype=sh :