K-114: SSH root login prompt with sshd drop-in in the install path

prompt_lxc_config asks 'SSH-Root-Login erlauben? [Y/n]' (env-presettable
via SSH_ROOT_LOGIN, validated, normalized to yes|no). The bootstrap passes
the value into the container; configure_ssh_root_login writes
/etc/ssh/sshd_config.d/zz-root-login.conf (yes -> PermitRootLogin yes,
no -> prohibit-password) and reloads sshd.

install/authentik-install.sh

@@ -29,6 +29,7 @@ CRED_FILE="/root/authentik.credentials"
 
 # ── base packages + Docker ────────────────────────────────────────────────────
 setup_base_apt ca-certificates curl
+configure_ssh_root_login
 if ! command -v docker >/dev/null 2>&1; then
   msg_info "Installing Docker (get.docker.com)..."
   curl -fsSL https://get.docker.com | sh >/dev/null

install/devpi-install.sh

@@ -19,6 +19,7 @@ DEVPI_PORT="3141"
 
 # ── packages + user + dirs ───────────────────────────────────────────────────
 setup_base_apt python3 python3-venv python3-pip
+configure_ssh_root_login
 
 create_system_user "$DEVPI_USER" "$DEVPI_HOME"
 mkdir -p "$DEVPI_DATA"

install/nexus-db-install.sh

@@ -36,6 +36,7 @@ CRED_FILE="/root/nexus-db.credentials"
 
 # ── packages: PGDG repo + PostgreSQL 16 + pgvector ────────────────────────────
 setup_base_apt curl ca-certificates gnupg lsb-release
+configure_ssh_root_login
 
 if [[ ! -f /etc/apt/sources.list.d/pgdg.sources ]] && [[ ! -f /etc/apt/sources.list.d/pgdg.list ]]; then
   msg_info "Adding PGDG apt repo..."

install/nexus-install.sh

@@ -46,6 +46,7 @@ run_user() { runuser -u "$APP_USER" -- env HOME="$APP_HOME" "$@"; }
 
 # ── packages: git + rsync + sudo ; Node.js via NodeSource ─────────────────────
 setup_base_apt git rsync sudo
+configure_ssh_root_login
 
 NODE_HAVE="$(command -v node >/dev/null 2>&1 && node -v | sed -E 's/^v([0-9]+).*/\1/' || echo 0)"
 if [[ "$NODE_HAVE" != "$NODE_MAJOR" ]]; then

install/webapp-install.sh

@@ -44,6 +44,7 @@ run_user() { runuser -u "$APP_USER" -- env HOME="$APP_HOME" "$@"; }
 
 # ── packages: git + rsync + sudo ; Node.js via NodeSource ────────────────────
 setup_base_apt git rsync sudo
+configure_ssh_root_login
 
 NODE_HAVE="$(command -v node >/dev/null 2>&1 && node -v | sed -E 's/^v([0-9]+).*/\1/' || echo 0)"
 if [[ "$NODE_HAVE" != "$NODE_MAJOR" ]]; then

lib/build.func

@@ -147,6 +147,16 @@ is_cidr() {
 
 is_ipcfg() { [[ "$1" == "dhcp" ]] || is_cidr "$1"; }
 
+# Ja/Nein-Antworten (Prompts wie "… erlauben? [Y/n]"). Akzeptiert
+# deutsch/englisch, normalize_yesno macht daraus kanonisch yes|no.
+is_yesno() { is_clean_ascii "$1" && [[ "${1,,}" =~ ^(y|yes|j|ja|n|no|nein)$ ]]; }
+normalize_yesno() {
+  case "${1,,}" in
+    y|yes|j|ja) printf 'yes' ;;
+    *)          printf 'no' ;;
+  esac
+}
+
 # Space/comma-separated list of IPv4s (DNS prompt). Gesamtstring zuerst
 # prüfen — die Wort-Splittung würde eingebettete Newlines sonst verstecken.
 is_ipv4_list() {
@@ -311,6 +321,17 @@ prompt_lxc_config() {
   else
     msg_warn "No network profile for VLAN ${VLAN_TAG:-none}; DHCP DNS will be inherited."
   fi
+
+  # SSH-Root-Login (Default: ja, Homelab-Komfort). Umgesetzt wird das im
+  # Install-Pfad per sshd-Drop-in (configure_ssh_root_login, lib/install.func);
+  # bootstrap_install_script reicht den normalisierten Wert in den Container.
+  if [[ -z "${SSH_ROOT_LOGIN:-}" ]]; then
+    prompt_validated SSH_ROOT_LOGIN "SSH-Root-Login erlauben? [Y/n]: " is_yesno "y"
+  else
+    require_valid SSH_ROOT_LOGIN is_yesno "SSH root login (y/n)"
+  fi
+  SSH_ROOT_LOGIN="$(normalize_yesno "$SSH_ROOT_LOGIN")"
+  echo "  → SSH root login: $SSH_ROOT_LOGIN"
 }
 
 # ── template ─────────────────────────────────────────────────────────────────
@@ -408,7 +429,9 @@ bootstrap_install_script() {
   pct exec "$CTID" -- bash -c "apt-get update -qq && apt-get install -y -qq curl ca-certificates >/dev/null"
 
   msg_info "Running installer ($url)..."
-  pct exec "$CTID" -- bash -c "curl -fsSL '$url' -o /root/${APP}-install.sh && bash /root/${APP}-install.sh"
+  # SSH_ROOT_LOGIN ist durch normalize_yesno kanonisch yes|no — als Env in
+  # den Container durchreichen (configure_ssh_root_login wertet es aus).
+  pct exec "$CTID" -- bash -c "curl -fsSL '$url' -o /root/${APP}-install.sh && SSH_ROOT_LOGIN='${SSH_ROOT_LOGIN:-yes}' bash /root/${APP}-install.sh"
 }
 
 # ── summary ──────────────────────────────────────────────────────────────────

lib/install.func

@@ -38,6 +38,36 @@ apt_cleanup() {
   apt-get autoclean -qq >/dev/null || true
 }
 
+# ── ssh ──────────────────────────────────────────────────────────────────────
+# SSH-Root-Login gemäß Host-Prompt (prompt_lxc_config setzt SSH_ROOT_LOGIN,
+# bootstrap_install_script reicht es als Env durch; Default: yes).
+#   yes → PermitRootLogin yes (Passwort-Login mit dem generierten Root-Passwort)
+#   no  → PermitRootLogin prohibit-password (Debian-Default, nur SSH-Key)
+# Umsetzung als Drop-in, damit Paket-Updates von sshd_config nicht kollidieren.
+configure_ssh_root_login() {
+  local choice="${SSH_ROOT_LOGIN:-yes}" value
+  case "$choice" in
+    yes) value="yes" ;;
+    no)  value="prohibit-password" ;;
+    *)   msg_err "SSH_ROOT_LOGIN must be yes|no, got: '$choice'"; return 1 ;;
+  esac
+
+  if [[ ! -d /etc/ssh/sshd_config.d ]]; then
+    if [[ "$choice" == "no" ]]; then
+      msg_warn "openssh-server not installed — nothing to configure (root login stays off)"
+      return 0
+    fi
+    msg_info "Installing openssh-server..."
+    apt-get install -y -qq openssh-server >/dev/null
+  fi
+
+  msg_info "Configuring SSH root login: PermitRootLogin $value"
+  printf 'PermitRootLogin %s\n' "$value" >/etc/ssh/sshd_config.d/zz-root-login.conf
+  systemctl reload ssh 2>/dev/null || systemctl restart ssh 2>/dev/null \
+    || msg_warn "ssh.service not active yet — config applies on first start"
+  msg_ok "SSH root login: $choice"
+}
+
 # ── users / dirs ─────────────────────────────────────────────────────────────
 create_system_user() {
   local user="$1" home="$2"

tests/test_validation.sh

@@ -77,6 +77,38 @@ assert_false "is_hostname lehnt 'a b' ab"          is_hostname "a b"
 assert_true  "is_token akzeptiert local-lvm"       is_token "local-lvm"
 assert_false "is_token lehnt 'a;b' ab"             is_token "a;b"
 
+# ── Ja/Nein (SSH-Root-Login-Prompt) ──────────────────────────────────────────
+assert_true  "is_yesno akzeptiert y"               is_yesno "y"
+assert_true  "is_yesno akzeptiert Ja"              is_yesno "Ja"
+assert_true  "is_yesno akzeptiert NO"              is_yesno "NO"
+assert_true  "is_yesno akzeptiert nein"            is_yesno "nein"
+assert_false "is_yesno lehnt 'maybe' ab"           is_yesno "maybe"
+assert_false "is_yesno lehnt leeren Wert ab"       is_yesno ""
+[[ "$(normalize_yesno "J")" == "yes" && "$(normalize_yesno "nein")" == "no" ]] \
+  && ok "normalize_yesno kanonisiert J→yes, nein→no" \
+  || nok "normalize_yesno kanonisiert J→yes, nein→no"
+
+# SSH-Root-Login-Prompt: leere Eingabe = Default Y → normalisiert yes;
+# explizites 'n' → no.
+ssh_default="$(
+  printf '\n' | {
+    SSH_ROOT_LOGIN=""
+    prompt_validated SSH_ROOT_LOGIN "SSH-Root-Login erlauben? [Y/n]: " is_yesno "y" >/dev/null 2>&1
+    normalize_yesno "$SSH_ROOT_LOGIN"
+  }
+)"
+[[ "$ssh_default" == "yes" ]] && ok "SSH-Root-Login: leere Eingabe → Default yes" \
+  || nok "SSH-Root-Login Default (got: '$ssh_default')"
+ssh_no="$(
+  printf 'n\n' | {
+    SSH_ROOT_LOGIN=""
+    prompt_validated SSH_ROOT_LOGIN "SSH-Root-Login erlauben? [Y/n]: " is_yesno "y" >/dev/null 2>&1
+    normalize_yesno "$SSH_ROOT_LOGIN"
+  }
+)"
+[[ "$ssh_no" == "no" ]] && ok "SSH-Root-Login: 'n' → no" \
+  || nok "SSH-Root-Login 'n' (got: '$ssh_no')"
+
 # ── require_valid: env-Werte werden sanitisiert + geprüft ────────────────────
 CHECKVAL=$'  7\r'
 require_valid CHECKVAL is_uint "Testwert" && [[ "$CHECKVAL" == "7" ]] \
@@ -145,12 +177,12 @@ ctid_out="$(
 smoke_out="$(
   env CTID=999 CT_HOSTNAME=smoke DISK_SIZE=8 CORES=2 RAM=1024 BRIDGE=vmbr0 \
     VLAN_TAG=20 TEMPLATE_STORAGE=local ROOTFS_STORAGE=local-lvm \
-    IPCFG=10.11.20.99/24 GATEWAY=10.11.20.1 NAMESERVER="" \
+    IPCFG=10.11.20.99/24 GATEWAY=10.11.20.1 NAMESERVER="" SSH_ROOT_LOGIN=J \
     NET_PROFILES_FILE="$REPO_ROOT/lib/networks.conf" \
-    bash -c "source '$REPO_ROOT/lib/build.func' && prompt_lxc_config >/dev/null && echo SMOKE-OK"
+    bash -c "source '$REPO_ROOT/lib/build.func' && prompt_lxc_config >/dev/null && echo SMOKE-OK:\$SSH_ROOT_LOGIN"
 )" || true
-[[ "$smoke_out" == *SMOKE-OK* ]] \
+[[ "$smoke_out" == *SMOKE-OK:yes* ]] \
-  && ok "prompt_lxc_config Dry-Run mit validen env-Werten läuft durch" \
+  && ok "prompt_lxc_config Dry-Run mit validen env-Werten läuft durch (SSH_ROOT_LOGIN J→yes)" \
   || nok "prompt_lxc_config Dry-Run (got: '$smoke_out')"
 
 smoke_bad="$(