622 lines
31 KiB
Bash
Executable File
622 lines
31 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Clusev WireGuard gate + peer CLI (HOST-side, root). Invoked via `clusev wg <cmd>` (the host
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# wrapper execs this from the deployed repo tree). Puts the panel behind a WG tunnel: the VM is the
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# WG server, operator devices peer in, and TCP 80/443 is filtered to the WG subnet by a dedicated
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# iptables chain hung off DOCKER-USER. The WG UDP port is NEVER matched. SSH (22) is only filtered if
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# the operator opts into the SEPARATE ssh-lock (default off); the server console + `clusev wg down`
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# are always a way back in. The panel gate is OFF until `clusev wg up`.
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set -euo pipefail
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WG_IF="wg0"
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WG_DIR="/etc/wireguard"
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WG_CONF="${WG_DIR}/${WG_IF}.conf"
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GATE_CHAIN="CLUSEV-WG-GATE"
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STATE_DIR="/etc/clusev"
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WG_ENV="${STATE_DIR}/wg.env"
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GATE_MARKER="${STATE_DIR}/wg-gate.enabled"
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PANEL_PORTS="80,443" # see spec §3 post-DNAT note: matches the published container ports (Caddy 80/443)
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# OPTIONAL SSH gate (separate, dangerous): SSH (22) is a HOST service — not Docker-published — so it
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# can't be filtered via DOCKER-USER; it needs a dedicated chain on the host INPUT chain. ESTABLISHED
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# sessions + the wg0 interface + the WG subnet are always allowed, so enabling it never cuts the
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# current SSH session, only NEW non-tunnel SSH. Off unless the operator explicitly enables it.
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SSH_MARKER="${STATE_DIR}/wg-ssh-gate.enabled"
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SSH_CHAIN="CLUSEV-WG-SSH"
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# Shape-check for a /N CIDR (single source for the subnet validators below). Single-quoted = literal.
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readonly CIDR_RE='^[0-9]{1,3}(\.[0-9]{1,3}){3}/[0-9]{1,2}$'
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# Project root (for the run/ bridge dir). The collect timer sets CLUSEV_DIR; otherwise derive it
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# from this script's location (docker/wg/clusev-wg.sh -> ../..).
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SELF_DIR="$(cd "$(dirname "$0")" && pwd)"
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CLUSEV_DIR="${CLUSEV_DIR:-$(cd "${SELF_DIR}/../.." && pwd)}"
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RUN_DIR="${CLUSEV_DIR}/run"
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bold() { printf '\033[1m%s\033[0m\n' "$*"; }
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info() { printf ' %s\n' "$*"; }
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warn() { printf '\033[33m ! %s\033[0m\n' "$*" >&2; }
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die() { printf '\033[31m x %s\033[0m\n' "$*" >&2; exit 1; }
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have() { command -v "$1" >/dev/null 2>&1; }
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need_root() { [ "$(id -u)" = 0 ] || die "Bitte mit sudo ausfuehren: sudo clusev wg ${1}"; }
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# Peer names land in a wg0.conf comment + are matched by awk/grep; restrict to a safe charset so a
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# name can never inject extra config lines (defence-in-depth — the caller is already root).
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valid_name() { case "$1" in ''|*[!A-Za-z0-9._-]*) return 1 ;; *) return 0 ;; esac; }
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# ── subnet helpers (SP1 assumes the default /24; documented in the runbook) ───────────────────
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subnet_first_ip() { local b="${1%%/*}"; printf '%s.%s\n' "${b%.*}" "$(( ${b##*.} + 1 ))"; }
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# Heuristic collision check: warn+re-prompt if the chosen subnet's /24 prefix already appears in the
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# host's routes or addresses. Not a formal CIDR-overlap proof — it is the practical guard the spec
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# asks for (catch a subnet that clashes with an existing interface/route), so a default cannot slip
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# past a LAN collision.
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subnet_collides() {
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local net="${1%%/*}" prefix
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prefix="${net%.*}" # first three octets, e.g. 10.99.0
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ip -o addr 2>/dev/null | awk '{print $4}' | grep -q "^${prefix}\." && return 0
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ip -o route 2>/dev/null | awk '{print $1}' | grep -q "^${prefix}\." && return 0
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return 1
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}
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detect_endpoint_ip() {
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# Same lookup as install.sh: public IP via ipify, fall back to the first local address.
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curl -fsS --max-time 5 https://api.ipify.org 2>/dev/null \
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|| hostname -I 2>/dev/null | awk '{print $1}'
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}
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require_setup() { [ -f "$WG_CONF" ] && [ -f "$WG_ENV" ] || die "Keine WG-Konfiguration — erst 'clusev wg setup' ausfuehren."; }
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# ── the gate ──────────────────────────────────────────────────────────────────────────────────
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gate_apply() {
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# Called by `up` and by the systemd unit on boot/Docker-restart. No-op (success) unless the
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# marker says the gate is enabled, so the boot unit never gates an operator who ran `down`.
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[ -f "$GATE_MARKER" ] || { info "Gate-Marker fehlt — Gate nicht angewendet."; return 0; }
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have iptables || die "iptables nicht gefunden."
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# shellcheck disable=SC1090
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[ -f "$WG_ENV" ] && . "$WG_ENV"
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[ -n "${WG_SUBNET:-}" ] || die "WG_SUBNET unbekannt (${WG_ENV} fehlt) — Gate nicht angewendet."
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iptables -nL DOCKER-USER >/dev/null 2>&1 || die "DOCKER-USER-Chain fehlt (laeuft Docker?) — Gate nicht angewendet."
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iptables -N "$GATE_CHAIN" 2>/dev/null || iptables -F "$GATE_CHAIN"
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iptables -A "$GATE_CHAIN" -i lo -j RETURN
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iptables -A "$GATE_CHAIN" -s "$WG_SUBNET" -p tcp -m multiport --dport "$PANEL_PORTS" -j RETURN
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iptables -A "$GATE_CHAIN" -p tcp -m multiport --dport "$PANEL_PORTS" -j DROP
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# exactly one jump at the top of DOCKER-USER (idempotent)
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iptables -D DOCKER-USER -j "$GATE_CHAIN" 2>/dev/null || true
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iptables -I DOCKER-USER 1 -j "$GATE_CHAIN"
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}
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gate_remove() {
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have iptables || return 0
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iptables -D DOCKER-USER -j "$GATE_CHAIN" 2>/dev/null || true
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iptables -F "$GATE_CHAIN" 2>/dev/null || true
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iptables -X "$GATE_CHAIN" 2>/dev/null || true
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}
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# ── the SSH gate (optional, host INPUT chain) ───────────────────────────────────────────────────
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ssh_gate_apply() {
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# No-op unless the operator enabled it. Applied alongside the panel gate by the boot unit + `up`.
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# Every guard below is FAIL-OPEN (return 0 = no DROP installed = SSH stays reachable): a missing
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# marker, no iptables, a tunnel that is down, or a corrupt subnet must NEVER wall off SSH.
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[ -f "$SSH_MARKER" ] || return 0
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have iptables || return 0
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# Self-guard (defence-in-depth; the boot unit also has ConditionPathExists=wg0): never install the
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# DROP while the tunnel interface is down — that is exactly when it would lock the operator out.
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[ -e "/sys/class/net/${WG_IF}" ] || return 0
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# shellcheck disable=SC1090
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[ -f "$WG_ENV" ] && . "$WG_ENV"
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[ -n "${WG_SUBNET:-}" ] || return 0
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# Re-validate the subnet shape before it reaches `iptables -s`; a malformed value fails open
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# (no DROP) rather than aborting mid-chain and leaving SSH half-filtered.
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printf '%s' "$WG_SUBNET" | grep -qE "$CIDR_RE" || return 0
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iptables -N "$SSH_CHAIN" 2>/dev/null || iptables -F "$SSH_CHAIN"
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iptables -A "$SSH_CHAIN" -i lo -j RETURN
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iptables -A "$SSH_CHAIN" -m conntrack --ctstate ESTABLISHED,RELATED -j RETURN # never cut a live session
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iptables -A "$SSH_CHAIN" -i "$WG_IF" -j RETURN # SSH over the tunnel
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iptables -A "$SSH_CHAIN" -s "$WG_SUBNET" -j RETURN # belt + suspenders
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iptables -A "$SSH_CHAIN" -p tcp --dport 22 -j DROP # everyone else
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iptables -D INPUT -p tcp --dport 22 -j "$SSH_CHAIN" 2>/dev/null || true
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iptables -I INPUT 1 -p tcp --dport 22 -j "$SSH_CHAIN"
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}
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ssh_gate_remove() {
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have iptables || return 0
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iptables -D INPUT -p tcp --dport 22 -j "$SSH_CHAIN" 2>/dev/null || true
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iptables -F "$SSH_CHAIN" 2>/dev/null || true
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iptables -X "$SSH_CHAIN" 2>/dev/null || true
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}
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# Cores: enable/disable the SSH gate (marker + apply/remove). Refuse to enable if wg0 is down (so a
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# broken tunnel can't be the moment you also wall off SSH). Errors to stderr.
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_ssh_gate_on() {
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require_setup
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[ -e "/sys/class/net/${WG_IF}" ] || { echo "wg0 nicht aktiv" >&2; return 1; }
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mkdir -p "$STATE_DIR"
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printf 'enabled\n' > "$SSH_MARKER"
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ssh_gate_apply
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}
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_ssh_gate_off() {
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rm -f "$SSH_MARKER"
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ssh_gate_remove
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}
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# ── commands ──────────────────────────────────────────────────────────────────────────────────
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# Core: create a peer + print ONLY the client config to stdout (errors to stderr, non-zero on fail).
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# Shared by the interactive cmd_add_peer and the write-bridge serve-request.
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_peer_add() {
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local name="$1"
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require_setup
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# shellcheck disable=SC1090
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. "$WG_ENV"
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[ -n "${WG_SUBNET:-}" ] && [ -n "${WG_SERVER_PUBKEY:-}" ] && [ -n "${WG_ENDPOINT:-}" ] || { echo "wg.env unvollstaendig" >&2; return 1; }
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grep -qF "# clusev-peer: ${name}" "$WG_CONF" 2>/dev/null && { echo "Peer existiert bereits" >&2; return 1; }
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local ip cpriv cpub
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ip="$(next_free_ip)" || { echo "kein freier Adressraum" >&2; return 1; }
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cpriv="$(wg genkey)"; cpub="$(printf '%s' "$cpriv" | wg pubkey)"
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cat >> "$WG_CONF" <<EOF
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# clusev-peer: ${name}
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[Peer]
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PublicKey = ${cpub}
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AllowedIPs = ${ip}/32
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EOF
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wg set "$WG_IF" peer "$cpub" allowed-ips "${ip}/32"
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cat <<EOF
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[Interface]
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PrivateKey = ${cpriv}
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Address = ${ip}/32
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DNS = 1.1.1.1
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[Peer]
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PublicKey = ${WG_SERVER_PUBKEY}
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Endpoint = ${WG_ENDPOINT}
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AllowedIPs = ${WG_SUBNET}
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PersistentKeepalive = 25
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EOF
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}
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cmd_add_peer() {
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need_root add-peer
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local name="${1:-}"; [ -n "$name" ] || die "Name fehlt: clusev wg add-peer <name>"
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valid_name "$name" || die "Ungueltiger Peer-Name — erlaubt: A-Z a-z 0-9 . _ -"
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local conf; conf="$(_peer_add "$name")" || die "Anlegen fehlgeschlagen: ${conf}"
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# shellcheck disable=SC1090
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[ -f "$WG_ENV" ] && . "$WG_ENV"
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local ip; ip="$(printf '%s\n' "$conf" | awk '/^Address/{print $3; exit}')"
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bold "Peer '${name}' angelegt (${ip%%/*})."
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printf '%s\n' "$conf"
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if have qrencode; then
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printf '%s\n' "$conf" | qrencode -t ansiutf8 || warn "QR-Erzeugung fehlgeschlagen — nutze die Textkonfiguration oben."
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else
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warn "qrencode nicht installiert — nutze die Textkonfiguration oben."
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fi
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info "AllowedIPs=${WG_SUBNET:-} = Split-Tunnel (nur Panel ueber WG). Voll-Tunnel (0.0.0.0/0) moeglich, aber NICHT empfohlen — leitet allen Client-Verkehr ueber Clusev."
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}
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# Core: remove the named peer from the running interface + wg0.conf. Errors to stderr.
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_peer_remove() {
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local name="$1"
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require_setup
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local pub
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pub="$(WANT="# clusev-peer: ${name}" awk '$0==ENVIRON["WANT"]{f=1;next} f&&/PublicKey/{gsub(/[ \t]/,"");sub(/PublicKey=/,"");print;exit}' "$WG_CONF")"
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[ -n "$pub" ] || { echo "Peer '${name}' nicht gefunden" >&2; return 1; }
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wg set "$WG_IF" peer "$pub" remove 2>/dev/null || true
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local tmp; tmp="$(mktemp)"
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WANT="# clusev-peer: ${name}" awk '
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$0==ENVIRON["WANT"] {drop=1; next}
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drop && /^[[:space:]]*$/ {drop=0; next}
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drop {next}
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{print}
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' "$WG_CONF" > "$tmp"
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install -m 0600 "$tmp" "$WG_CONF"; rm -f "$tmp"
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}
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cmd_remove_peer() {
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need_root remove-peer
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local name="${1:-}"; [ -n "$name" ] || die "Name fehlt: clusev wg remove-peer <name>"
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valid_name "$name" || die "Ungueltiger Peer-Name — erlaubt: A-Z a-z 0-9 . _ -"
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_peer_remove "$name" || die "Entfernen fehlgeschlagen."
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bold "Peer '${name}' entfernt."
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}
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# Core: enable the gate (write marker + apply). Refuses if wg0 is down. Errors to stderr.
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_gate_up_now() {
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require_setup
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[ -e "/sys/class/net/${WG_IF}" ] || { echo "wg0 nicht aktiv" >&2; return 1; }
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mkdir -p "$STATE_DIR"
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printf 'enabled\n' > "$GATE_MARKER"
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gate_apply
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}
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cmd_up() {
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need_root up
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require_setup
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[ -e "/sys/class/net/${WG_IF}" ] || die "${WG_IF} ist nicht aktiv. Erst Tunnel testen (siehe 'clusev wg status'), dann 'clusev wg up'."
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warn "Vor dem Gate sicherstellen, dass der Tunnel das Panel erreicht. Notausgang ueber SSH: 'clusev wg down'."
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_gate_up_now
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bold "WireGuard-Gate aktiv — Panel (80/443) nur noch ueber den Tunnel erreichbar."
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info "Notausgang (per SSH, falls der Tunnel nicht erreicht): clusev wg down"
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}
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cmd_down() {
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need_root down
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# Full escape: removes BOTH gates (panel + the optional SSH gate) + their markers.
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rm -f "$GATE_MARKER" "$SSH_MARKER"
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gate_remove
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ssh_gate_remove
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bold "WireGuard-Gate entfernt — Panel (80/443) wieder oeffentlich erreichbar (vorbehaltlich Cloud-/Host-Firewall)."
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info "SSH-Sperre (falls aktiv) ebenfalls entfernt."
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}
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cmd_ssh_lock() {
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need_root ssh-lock
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warn "SSH (22) wird gesperrt — danach erreichst du den Host nur noch UEBER DEN TUNNEL oder die Server-Konsole."
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warn "Verlierst du deinen WG-Zugang, kommst du per SSH NICHT mehr rein. Lege dir vorher einen zweiten WG-Peer als Backup an."
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if _ssh_gate_on; then
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bold "SSH-Sperre aktiv — Port 22 nur noch ueber wg0/${WG_IF} bzw. das WG-Subnetz erreichbar."
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info "Aufheben: 'clusev wg ssh-unlock' (oder 'clusev wg down' fuer alle Gates) — von der Server-Konsole aus immer moeglich."
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else
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die "SSH-Sperre fehlgeschlagen (wg0 aktiv? Setup vorhanden?)."
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fi
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}
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cmd_ssh_unlock() {
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need_root ssh-unlock
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_ssh_gate_off
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bold "SSH-Sperre entfernt — Port 22 wieder normal erreichbar (vorbehaltlich Cloud-/Host-Firewall)."
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}
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next_free_ip() {
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# shellcheck disable=SC1090
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. "$WG_ENV"
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[ -n "${WG_SUBNET:-}" ] || die "WG_SUBNET fehlt in ${WG_ENV} — Setup erneut ausfuehren."
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local prefix="${WG_SUBNET%%/*}"; prefix="${prefix%.*}" # first three octets (SP1: /24)
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local used; used="$(awk -F= '/AllowedIPs/{gsub(/[ \t]/,"",$2);split($2,a,"/");print a[1]}' "$WG_CONF" 2>/dev/null || true)"
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used="$(printf '%s\n%s\n' "$used" "${WG_SERVER_IP:-}")"
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local i cand
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for i in $(seq 2 254); do
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cand="${prefix}.${i}"
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printf '%s\n' "$used" | grep -qx "$cand" || { printf '%s\n' "$cand"; return 0; }
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done
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return 1
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}
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cmd_status() {
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need_root status
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bold "WireGuard (${WG_IF})"
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if [ -e "/sys/class/net/${WG_IF}" ]; then wg show "$WG_IF" 2>/dev/null || true; else info "wg0 nicht aktiv (Setup/Tunnel noch nicht gestartet)."; fi
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echo
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bold "Gate"
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if [ -f "$GATE_MARKER" ]; then info "Panel-Marker: aktiv (${GATE_MARKER})"; else info "Panel-Marker: aus"; fi
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if iptables -nL "$GATE_CHAIN" >/dev/null 2>&1; then info "Chain ${GATE_CHAIN}: vorhanden"; else info "Chain ${GATE_CHAIN}: nicht vorhanden"; fi
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if [ -f "$SSH_MARKER" ]; then info "SSH-Sperre: AKTIV (${SSH_MARKER}) — Notausgang nur ueber den Tunnel/Konsole"; else info "SSH-Sperre: aus"; fi
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echo
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bold "Dienst wg-quick@${WG_IF}"
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systemctl is-active "wg-quick@${WG_IF}" 2>/dev/null || true
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}
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# Non-interactive setup for the dashboard write-bridge. Args are re-validated here (defence in
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# depth). Refuses to clobber an existing wg0.conf. Does NOT enable the gate. On success prints the
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# first peer's client config to stdout (for the show-once modal). Errors to stderr, non-zero on fail.
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_setup_noninteractive() {
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local subnet="$1" server_ip="$2" port="$3" endpoint="$4" peer1="$5"
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have wg || { echo "wireguard-tools fehlt" >&2; return 1; }
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[ -f "$WG_CONF" ] && { echo "WireGuard ist bereits eingerichtet" >&2; return 1; }
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printf '%s' "$subnet" | grep -qE "$CIDR_RE" || { echo "Ungueltiges Subnetz" >&2; return 1; }
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case "$server_ip" in ''|*[!0-9.]*) echo "Ungueltige Server-IP" >&2; return 1 ;; esac
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case "$port" in ''|*[!0-9]*) echo "Ungueltiger Port" >&2; return 1 ;; esac
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[ "$port" -ge 1 ] && [ "$port" -le 65535 ] || { echo "Port ausserhalb 1-65535" >&2; return 1; }
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case "$endpoint" in ''|*[!A-Za-z0-9.:_-]*) echo "Ungueltiger Endpoint" >&2; return 1 ;; esac
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valid_name "$peer1" || { echo "Ungueltiger Peer-Name" >&2; return 1; }
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subnet_collides "$subnet" && { echo "Subnetz kollidiert mit einer bestehenden Route/Adresse" >&2; return 1; }
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_write_server_conf "$subnet" "$server_ip" "$port" "$endpoint"
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systemctl enable --now "wg-quick@${WG_IF}" || { echo "wg-quick@${WG_IF} konnte nicht gestartet werden" >&2; return 1; }
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_peer_add "$peer1"
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}
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# Generate the server keypair and write wg0.conf + wg.env (both 0600). Shared by both setup paths
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# (dashboard _setup_noninteractive + interactive cmd_setup); the caller does `systemctl enable --now`
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# and the first-peer add, since those differ (error style return-vs-die, _peer_add vs cmd_add_peer).
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_write_server_conf() {
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local subnet="$1" server_ip="$2" port="$3" endpoint="$4"
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umask 077; mkdir -p "$WG_DIR" "$STATE_DIR"
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local srv_priv srv_pub prefix
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srv_priv="$(wg genkey)"; srv_pub="$(printf '%s' "$srv_priv" | wg pubkey)"
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prefix="${subnet##*/}"
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cat > "$WG_CONF" <<EOF
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[Interface]
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Address = ${server_ip}/${prefix}
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ListenPort = ${port}
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PrivateKey = ${srv_priv}
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EOF
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chmod 600 "$WG_CONF"
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cat > "$WG_ENV" <<EOF
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WG_SUBNET=${subnet}
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WG_SERVER_IP=${server_ip}
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WG_PORT=${port}
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WG_ENDPOINT=${endpoint}
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WG_SERVER_PUBKEY=${srv_pub}
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EOF
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chmod 600 "$WG_ENV"
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|
}
|
|
|
|
cmd_setup() {
|
|
need_root setup
|
|
have wg || die "wireguard-tools nicht installiert (erwartet via install.sh)."
|
|
if [ -f "$WG_CONF" ]; then
|
|
warn "${WG_CONF} existiert bereits — bestehende Peers gingen bei Neukonfiguration verloren."
|
|
read -rp " Trotzdem neu konfigurieren? [reconfigure/abort] (abort): " ans || ans=abort
|
|
[ "${ans:-abort}" = "reconfigure" ] || die "Abgebrochen — bestehende Konfiguration unberuehrt."
|
|
fi
|
|
|
|
local subnet default_subnet="10.99.0.0/24"
|
|
while :; do
|
|
if ! read -rp " WG-Subnetz (privates /24, darf NICHT mit LAN/VPN kollidieren) [${default_subnet}]: " subnet; then
|
|
subnet="$default_subnet" # closed stdin → take the default once
|
|
fi
|
|
subnet="${subnet:-$default_subnet}"
|
|
if subnet_collides "$subnet"; then
|
|
warn "Subnetz ${subnet} ueberschneidet eine bestehende Route/Adresse — bitte ein anderes waehlen."
|
|
[ -t 0 ] || die "Subnetz-Kollision und keine interaktive Eingabe moeglich (stdin geschlossen)."
|
|
continue
|
|
fi
|
|
break
|
|
done
|
|
|
|
local server_ip default_ip port endpoint peer1
|
|
default_ip="$(subnet_first_ip "$subnet")"
|
|
read -rp " Server-Tunnel-IP [${default_ip}]: " server_ip || true; server_ip="${server_ip:-$default_ip}"
|
|
read -rp " Listen-Port (UDP) [51820]: " port || true; port="${port:-51820}"
|
|
local ep; ep="$(detect_endpoint_ip)"
|
|
if [ -n "$ep" ]; then
|
|
local default_ep="${ep}:${port}"
|
|
info "Hinweis: hinter NAT/Cloud-LB ist die erkannte IP evtl. NICHT die Waehl-Adresse der Clients — vor 'clusev wg up' pruefen."
|
|
read -rp " Oeffentlicher Endpoint (IP oder DNS:Port) [${default_ep}]: " endpoint || true
|
|
endpoint="${endpoint:-$default_ep}"
|
|
else
|
|
warn "Oeffentliche IP konnte nicht erkannt werden — bitte Endpoint manuell angeben."
|
|
read -rp " Oeffentlicher Endpoint (IP oder DNS:Port, erforderlich): " endpoint || true
|
|
fi
|
|
[ -n "$endpoint" ] || die "Endpoint erforderlich."
|
|
read -rp " Name des ersten Peers [client-1]: " peer1 || true; peer1="${peer1:-client-1}"
|
|
|
|
_write_server_conf "$subnet" "$server_ip" "$port" "$endpoint"
|
|
systemctl enable --now "wg-quick@${WG_IF}" || die "wg-quick@${WG_IF} konnte nicht gestartet werden — 'journalctl -u wg-quick@${WG_IF}' pruefen."
|
|
cmd_add_peer "$peer1"
|
|
echo
|
|
bold "Setup fertig. Tunnel ist OBEN, aber das Gate ist AUS (Panel weiter oeffentlich)."
|
|
info "1) Client importieren (QR oben), 2) http://${server_ip} ueber den Tunnel oeffnen, 3) dann: clusev wg up"
|
|
}
|
|
|
|
# Minimal-but-correct JSON string escaper (backslash, quote, CR, tab, newline).
|
|
_json_str() {
|
|
local s="$1"
|
|
s="${s//\\/\\\\}"
|
|
s="${s//\"/\\\"}"
|
|
s="${s//$'\r'/}"
|
|
s="${s//$'\t'/\\t}"
|
|
s="${s//$'\n'/\\n}"
|
|
printf '"%s"' "$s"
|
|
}
|
|
|
|
# Write run/wg-result-<id>.json (0600, owned by the run/ owner = the app uid).
|
|
_write_result() {
|
|
local id="$1" ok="$2" msg="$3" config="$4"
|
|
local f="${RUN_DIR}/wg-result-${id}.json" cfg='null'
|
|
[ -n "$config" ] && cfg="$(_json_str "$config")"
|
|
mkdir -p "$RUN_DIR" 2>/dev/null || true
|
|
printf '{"id":"%s","ok":%s,"message":%s,"config":%s,"at":%s}\n' \
|
|
"$id" "$ok" "$(_json_str "$msg")" "$cfg" "$(date +%s 2>/dev/null || echo 0)" > "${f}.tmp"
|
|
mv -f "${f}.tmp" "$f" 2>/dev/null || { rm -f "${f}.tmp"; return 0; }
|
|
chown "$(stat -c %u:%g "$RUN_DIR" 2>/dev/null || echo 0:0)" "$f" 2>/dev/null || true
|
|
chmod 600 "$f" 2>/dev/null || true
|
|
}
|
|
|
|
# Process one UI write-request. Whitelists the action + re-validates every arg HOST-SIDE.
|
|
cmd_serve_request() {
|
|
need_root serve-request
|
|
umask 077 # result + QR sidecar carry a private key — born 0600, never world-readable in run/ (0775)
|
|
local req="${RUN_DIR}/wg-request.json" work="${RUN_DIR}/wg-request.processing"
|
|
[ -f "$req" ] || return 0
|
|
mv -f "$req" "$work" 2>/dev/null || return 0
|
|
local json id action name
|
|
json="$(cat "$work" 2>/dev/null || true)"; rm -f "$work"
|
|
|
|
# Each field is OPTIONAL per action (e.g. gate-up carries no name/endpoint/port/subnet, setup may
|
|
# carry an empty endpoint). The trailing `|| true` is LOAD-BEARING: under `set -euo pipefail` a
|
|
# non-matching grep makes the pipeline fail, which would abort the whole handler BEFORE it writes a
|
|
# result — the app then never gets a reply and times out ("Keine Antwort vom Host"). Never remove it.
|
|
id="$(printf '%s' "$json" | grep -oE '"id":"[A-Za-z0-9]{16,64}"' | head -n1 | sed -E 's/.*:"//; s/"$//' || true)"
|
|
[ -n "$id" ] || return 0
|
|
action="$(printf '%s' "$json" | grep -oE '"action":"[a-z-]{1,24}"' | head -n1 | sed -E 's/.*:"//; s/"$//' || true)"
|
|
name="$(printf '%s' "$json" | grep -oE '"name":"[A-Za-z0-9._-]{1,64}"' | head -n1 | sed -E 's/.*:"//; s/"$//' || true)"
|
|
local endpoint port subnet
|
|
endpoint="$(printf '%s' "$json" | grep -oE '"endpoint":"[A-Za-z0-9.:_-]{1,128}"' | head -n1 | sed -E 's/.*:"//; s/"$//' || true)"
|
|
port="$(printf '%s' "$json" | grep -oE '"port":"[0-9]{1,5}"' | head -n1 | sed -E 's/.*:"//; s/"$//' || true)"
|
|
subnet="$(printf '%s' "$json" | grep -oE '"subnet":"[0-9./]{1,18}"' | head -n1 | sed -E 's/.*:"//; s/"$//' || true)"
|
|
|
|
local ok=false msg='ok' config=''
|
|
case "$action" in
|
|
add-peer)
|
|
if valid_name "$name"; then
|
|
if config="$(_peer_add "$name" 2>/dev/null)"; then ok=true; else ok=false; msg='add-failed'; config=''; fi
|
|
else msg='invalid-name'; fi ;;
|
|
# Every handler runs in a SUBSHELL ( ... ): these helpers call require_setup, which `die`s (exit)
|
|
# on a not-yet-configured tunnel. Without the subshell that exit would abort serve-request BEFORE
|
|
# _write_result, so the app would time out instead of getting a clean failure reply. add-peer/setup
|
|
# are already isolated because they run inside a $(...) command substitution (its own subshell).
|
|
remove-peer)
|
|
if valid_name "$name"; then
|
|
if ( _peer_remove "$name" ) >/dev/null 2>&1; then ok=true; else msg='remove-failed'; fi
|
|
else msg='invalid-name'; fi ;;
|
|
gate-up) if ( _gate_up_now ) >/dev/null 2>&1; then ok=true; else msg='gate-up-failed'; fi ;;
|
|
gate-down) if ( rm -f "$GATE_MARKER"; gate_remove ) >/dev/null 2>&1; then ok=true; else msg='gate-down-failed'; fi ;; # panel only; SSH gate is its own toggle
|
|
gate-ssh-on) if ( _ssh_gate_on ) >/dev/null 2>&1; then ok=true; else msg='ssh-gate-on-failed'; fi ;;
|
|
gate-ssh-off) if ( _ssh_gate_off ) >/dev/null 2>&1; then ok=true; else msg='ssh-gate-off-failed'; fi ;;
|
|
set-endpoint) if [ -n "$endpoint" ] && ( _set_endpoint "$endpoint" ) >/dev/null 2>&1; then ok=true; else msg='set-endpoint-failed'; fi ;;
|
|
set-port) if [ -n "$port" ] && ( _set_port "$port" ) >/dev/null 2>&1; then ok=true; else msg='set-port-failed'; fi ;;
|
|
set-subnet) if [ -n "$subnet" ] && ( _set_subnet "$subnet" ) >/dev/null 2>&1; then ok=true; else msg='set-subnet-failed'; fi ;;
|
|
setup)
|
|
local sip ep pn
|
|
sip="$(subnet_first_ip "$subnet" 2>/dev/null || true)"
|
|
ep="$endpoint"; [ -n "$ep" ] || ep="$(detect_endpoint_ip):${port}"
|
|
pn="$name"; [ -n "$pn" ] || pn='client-1'
|
|
if [ -n "$subnet" ] && [ -n "$port" ]; then
|
|
local tmperr; tmperr="$(mktemp 2>/dev/null || echo /tmp/wgsetup.err)"
|
|
if config="$(_setup_noninteractive "$subnet" "$sip" "$port" "$ep" "$pn" 2>"$tmperr")"; then
|
|
ok=true
|
|
else
|
|
ok=false; config=''; msg="$(tr '\n' ' ' < "$tmperr" 2>/dev/null | head -c 120)"; [ -n "$msg" ] || msg='setup-failed'
|
|
fi
|
|
rm -f "$tmperr"
|
|
else
|
|
msg='setup-bad-args'
|
|
fi ;;
|
|
*) msg='unknown-action' ;;
|
|
esac
|
|
|
|
_write_result "$id" "$ok" "$msg" "$config"
|
|
if [ "$ok" = true ] && { [ "$action" = add-peer ] || [ "$action" = setup ]; } && [ -n "$config" ] && have qrencode; then
|
|
local qr="${RUN_DIR}/wg-qr-${id}.svg"
|
|
if printf '%s\n' "$config" | qrencode -t SVG -o "$qr" 2>/dev/null; then
|
|
chown "$(stat -c %u:%g "$RUN_DIR" 2>/dev/null || echo 0:0)" "$qr" 2>/dev/null || true
|
|
chmod 600 "$qr" 2>/dev/null || true
|
|
fi
|
|
fi
|
|
}
|
|
|
|
# Emit run/wg-status.json (atomic temp+mv). Public, NO secrets. If WG isn't configured, emits
|
|
# {"configured":false}. Run every few seconds by clusev-wg-collect.timer; the dashboard reads it.
|
|
# ── settings mutators (cores: no prints; errors to stderr; non-zero on fail) ──────────────────
|
|
_set_endpoint() {
|
|
local ep="$1"; require_setup
|
|
# Re-validated here (defence-in-depth): the bare CLI path cmd_set_endpoint passes $1 unchecked.
|
|
case "$ep" in *[!A-Za-z0-9.:_-]*|'') echo "bad endpoint" >&2; return 1 ;; esac
|
|
sed -i "s#^WG_ENDPOINT=.*#WG_ENDPOINT=${ep}#" "$WG_ENV"
|
|
}
|
|
|
|
_set_port() {
|
|
local port="$1"; require_setup
|
|
# Re-validated here: cmd_set_port passes $1 unchecked; also adds the 1-65535 range the bridge regex omits.
|
|
case "$port" in ''|*[!0-9]*) echo "bad port" >&2; return 1 ;; esac
|
|
[ "$port" -ge 1 ] && [ "$port" -le 65535 ] || { echo "port out of range" >&2; return 1; }
|
|
sed -i "s#^ListenPort = .*#ListenPort = ${port}#" "$WG_CONF"
|
|
sed -i "s#^WG_PORT=.*#WG_PORT=${port}#" "$WG_ENV"
|
|
systemctl restart "wg-quick@${WG_IF}" || { echo "wg-quick restart failed" >&2; return 1; }
|
|
}
|
|
|
|
_set_subnet() {
|
|
local subnet="$1"; require_setup
|
|
# Re-validated here (defence-in-depth): the bare CLI path cmd_set_subnet passes $1 unchecked.
|
|
case "$subnet" in *[!0-9./]*|'') echo "bad subnet" >&2; return 1 ;; esac
|
|
printf '%s' "$subnet" | grep -qE "$CIDR_RE" || { echo "bad subnet" >&2; return 1; }
|
|
subnet_collides "$subnet" && { echo "subnet collides with an existing route/address" >&2; return 1; }
|
|
local prefix server_ip
|
|
prefix="${subnet##*/}"
|
|
server_ip="$(subnet_first_ip "$subnet")"
|
|
sed -i "s#^Address = .*#Address = ${server_ip}/${prefix}#" "$WG_CONF"
|
|
sed -i "s#^WG_SUBNET=.*#WG_SUBNET=${subnet}#" "$WG_ENV"
|
|
sed -i "s#^WG_SERVER_IP=.*#WG_SERVER_IP=${server_ip}#" "$WG_ENV"
|
|
systemctl restart "wg-quick@${WG_IF}" || { echo "wg-quick restart failed" >&2; return 1; }
|
|
}
|
|
|
|
cmd_set_endpoint() { need_root set-endpoint; local v="${1:-}"; [ -n "$v" ] || die "Endpoint fehlt."; _set_endpoint "$v" || die "Endpoint setzen fehlgeschlagen."; bold "Endpoint gesetzt: ${v}"; }
|
|
cmd_set_port() { need_root set-port; local v="${1:-}"; [ -n "$v" ] || die "Port fehlt."; _set_port "$v" || die "Port setzen fehlgeschlagen."; bold "Port gesetzt: ${v} (Clients muessen den Port aktualisieren)."; }
|
|
cmd_set_subnet() { need_root set-subnet; local v="${1:-}"; [ -n "$v" ] || die "Subnetz fehlt."; _set_subnet "$v" || die "Subnetz setzen fehlgeschlagen."; bold "Subnetz gesetzt: ${v} (bestehende Peers muessen neu angelegt werden)."; }
|
|
|
|
cmd_collect() {
|
|
mkdir -p "$RUN_DIR" 2>/dev/null || true
|
|
# Drop result + QR sidecars older than 60 s (they carry a private key; the app reads them once).
|
|
find "$RUN_DIR" -maxdepth 1 -type f \( -name 'wg-result-*.json' -o -name 'wg-qr-*.svg' \) -mmin +1 -delete 2>/dev/null || true
|
|
local now tmp dest
|
|
now="$(date +%s 2>/dev/null || echo 0)"
|
|
dest="${RUN_DIR}/wg-status.json"
|
|
tmp="$(mktemp "${RUN_DIR}/.wg-status.XXXXXX" 2>/dev/null)" || tmp="${RUN_DIR}/.wg-status.tmp"
|
|
|
|
if [ ! -f "$WG_CONF" ]; then
|
|
printf '{"at":%s,"configured":false}\n' "$now" > "$tmp"
|
|
mv -f "$tmp" "$dest" 2>/dev/null || { rm -f "$tmp"; return 0; }
|
|
chmod 644 "$dest" 2>/dev/null || true
|
|
return 0
|
|
fi
|
|
|
|
# shellcheck disable=SC1090
|
|
[ -f "$WG_ENV" ] && . "$WG_ENV"
|
|
local gate_marker=false gate_chain=false ssh_marker=false wgq
|
|
[ -f "$GATE_MARKER" ] && gate_marker=true
|
|
iptables -nL "$GATE_CHAIN" >/dev/null 2>&1 && gate_chain=true
|
|
[ -f "$SSH_MARKER" ] && ssh_marker=true
|
|
wgq="$(systemctl is-active "wg-quick@${WG_IF}" 2>/dev/null || echo inactive)"
|
|
|
|
# Peers from `wg show wg0 dump`, named via the wg0.conf `# clusev-peer:` comments. Peer names are
|
|
# valid_name-restricted and pubkeys/endpoints are from safe charsets, so the values are JSON-safe.
|
|
local peers_json
|
|
peers_json="$({ wg show "$WG_IF" dump 2>/dev/null || true; } | awk -v conf="$WG_CONF" '
|
|
BEGIN {
|
|
name=""
|
|
while ((getline line < conf) > 0) {
|
|
if (line ~ /^# clusev-peer:/) { sub(/^# clusev-peer:[ \t]*/,"",line); name=line }
|
|
else if (name != "" && line ~ /^PublicKey[ \t]*=/) { p=line; sub(/^PublicKey[ \t]*=[ \t]*/,"",p); names[p]=name; name="" }
|
|
}
|
|
close(conf); out=""; first=1
|
|
}
|
|
NR==1 { next } # interface line
|
|
{
|
|
pk=$1; endp=$3; hs=$5+0; rx=$6+0; tx=$7+0
|
|
if (endp=="(none)") endp=""
|
|
nm=(pk in names)?names[pk]:""
|
|
rec="{\"name\":\"" nm "\",\"pubkey\":\"" pk "\",\"endpoint\":\"" endp "\",\"latest_handshake\":" hs ",\"rx\":" rx ",\"tx\":" tx "}"
|
|
if (first) { out=rec; first=0 } else { out=out "," rec }
|
|
}
|
|
END { printf "[%s]", out }
|
|
')"
|
|
[ -n "$peers_json" ] || peers_json="[]"
|
|
|
|
printf '{"at":%s,"configured":true,"gate":{"marker":%s,"chain":%s,"ssh":%s},"wg_quick":"%s","server":{"subnet":"%s","server_ip":"%s","port":%s,"endpoint":"%s","pubkey":"%s"},"peers":%s}\n' \
|
|
"$now" "$gate_marker" "$gate_chain" "$ssh_marker" "$wgq" \
|
|
"${WG_SUBNET:-}" "${WG_SERVER_IP:-}" "${WG_PORT:-0}" "${WG_ENDPOINT:-}" "${WG_SERVER_PUBKEY:-}" \
|
|
"$peers_json" > "$tmp"
|
|
mv -f "$tmp" "$dest" 2>/dev/null || { rm -f "$tmp"; return 0; }
|
|
chmod 644 "$dest" 2>/dev/null || true
|
|
}
|
|
|
|
usage() {
|
|
cat <<'EOF'
|
|
clusev wg — WireGuard-Zugang (Host)
|
|
|
|
clusev wg setup WG einrichten (interaktiv): Subnetz, Keys, erster Peer
|
|
clusev wg up Gate aktivieren — Panel (80/443) nur ueber den Tunnel
|
|
clusev wg down Gate entfernen — Panel wieder oeffentlich (Notausgang!)
|
|
clusev wg status Tunnel, Peers, Gate-Status anzeigen
|
|
clusev wg add-peer <name> neuen Client anlegen (+ QR-Code)
|
|
clusev wg remove-peer <name> Client entfernen
|
|
clusev wg set-endpoint <ip:port> oeffentlichen Endpoint aendern
|
|
clusev wg set-port <udp> Listen-Port aendern (Clients neu)
|
|
clusev wg set-subnet <cidr> Subnetz aendern (Peers neu anlegen)
|
|
clusev wg ssh-lock SSH (22) sperren — nur noch ueber den Tunnel (Vorsicht: Aussperr-Gefahr!)
|
|
clusev wg ssh-unlock SSH-Sperre wieder aufheben
|
|
|
|
Der WG-Port bleibt IMMER offen. 'clusev wg down' (Server-Konsole) ist der Notausgang fuer ALLE Gates.
|
|
ssh-lock kann dich aussperren — vorher einen zweiten WG-Peer als Backup-Zugang anlegen.
|
|
EOF
|
|
}
|
|
|
|
cmd="${1:-help}"; shift 2>/dev/null || true
|
|
case "$cmd" in
|
|
setup) cmd_setup "$@" ;;
|
|
up) cmd_up "$@" ;;
|
|
down) cmd_down "$@" ;;
|
|
status) cmd_status "$@" ;;
|
|
add-peer) cmd_add_peer "$@" ;;
|
|
remove-peer) cmd_remove_peer "$@" ;;
|
|
set-endpoint) cmd_set_endpoint "$@" ;;
|
|
set-port) cmd_set_port "$@" ;;
|
|
set-subnet) cmd_set_subnet "$@" ;;
|
|
ssh-lock) cmd_ssh_lock "$@" ;;
|
|
ssh-unlock) cmd_ssh_unlock "$@" ;;
|
|
gate-apply) need_root gate-apply; gate_apply; ssh_gate_apply ;; # called by clusev-wg-gate.service (both gates re-applied on boot)
|
|
collect) cmd_collect ;; # called by clusev-wg-collect.timer (read-only; no root needed)
|
|
serve-request) cmd_serve_request ;; # called by clusev-wg-request.service
|
|
help|-h|--help) usage ;;
|
|
*) printf 'Unbekannter Befehl: %s\n\n' "$cmd" >&2; usage; exit 64 ;;
|
|
esac
|