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// Copyright (c) 2026 Ivan Vasilev
// This source code is licensed under the MIT license found in the
// LICENSE file in the root directory of this source tree.
import fs, { readFileSync, writeFileSync, existsSync, mkdirSync } from "fs";
import path from "path";
import crypto from "crypto";
import { execSync, spawnSync } from "child_process";
import * as zlib from "zlib";
import express, { Request, Response, NextFunction } from "express";
import Database from "better-sqlite3";
import winston from "winston";
const logsDir = path.join(process.cwd(), "logs");
if (!existsSync(logsDir)) mkdirSync(logsDir, { recursive: true });
const logger = winston.createLogger({
level: "debug",
transports: [
new winston.transports.Console({
format: winston.format.combine(
winston.format.timestamp(),
winston.format.colorize(),
winston.format.printf(({ timestamp, level, message }) =>
`${timestamp} ${level}: ${message}`
),
),
}),
new winston.transports.File({
filename: path.join(logsDir, "app.log"),
format: winston.format.combine(
winston.format.timestamp(),
winston.format.json(),
),
}),
],
});
const INTERNAL_AUTH_PUB_FILE = process.env.INTERNAL_AUTH_PUB_FILE
?? "/etc/amnezia/amneziawg/internal_auth_public.key";
let internalAuthPubKey: crypto.KeyObject;
try {
internalAuthPubKey = crypto.createPublicKey(readFileSync(INTERNAL_AUTH_PUB_FILE));
} catch {
logger.error("FATAL: публичный ключ внутренней авторизации не найден: " + INTERNAL_AUTH_PUB_FILE);
process.exit(1);
}
const SERVER = {
port: Number(process.env.PORT) || 3005,
};
const dbPath = path.join("/etc/amnezia/amneziawg", "users.db");
const db = new Database(dbPath);
db.exec(`
CREATE TABLE IF NOT EXISTS users (
name TEXT PRIMARY KEY,
ip TEXT NOT NULL UNIQUE,
pub_key TEXT NOT NULL,
vpn_key TEXT NOT NULL,
psk_key TEXT NOT NULL DEFAULT ''
)
`);
db.exec("CREATE UNIQUE INDEX IF NOT EXISTS idx_users_ip ON users (ip)");
db.exec(`
CREATE TABLE IF NOT EXISTS config (
key TEXT PRIMARY KEY,
value TEXT NOT NULL
)
`);
const cfgStmts = {
get: db.prepare<[string], { value: string }>("SELECT value FROM config WHERE key = ?"),
set: db.prepare<[string, string]>("INSERT OR REPLACE INTO config (key, value) VALUES (?, ?)"),
};
function getCfg(key: string, fallback: string): string {
return cfgStmts.get.get(key)?.value ?? fallback;
}
function setCfg(key: string, value: string) {
cfgStmts.set.run(key, value);
}
function getLocalIp(): string {
const route = spawnSync("ip", ["route", "show", "default"]);
const iface = route.stdout.toString().match(/dev\s+(\S+)/)?.[1];
if (!iface) return "";
const addr = spawnSync("ip", ["addr", "show", iface]);
return addr.stdout.toString().match(/inet\s+([\d.]+)/)?.[1] ?? "";
}
function initConfig() {
const serverIp = getCfg("serverIp", process.env.SERVER_IP ?? getLocalIp());
const serverPort = getCfg("serverPort", process.env.SERVER_PORT ?? "51820");
const serverName = getCfg("serverName", process.env.SERVER_NAME ?? "VPN");
if (!serverIp) throw new Error("SERVER_IP не задан — передай через env при первом запуске");
setCfg("serverIp", serverIp);
setCfg("serverPort", serverPort);
setCfg("serverName", serverName);
return { serverIp, serverPort: Number(serverPort), serverName };
}
interface AwgParams {
Jc: number; Jmin: number; Jmax: number;
S1: number; S2: number; S3: number; S4: number;
H1: string; H2: string; H3: string; H4: string;
I1: string; I2: string; I3: string; I4: string; I5: string;
}
const DEFAULT_AWG_PARAMS: AwgParams = {
Jc: 6, Jmin: 10, Jmax: 50,
S1: 90, S2: 45, S3: 37, S4: 14,
H1: "1224800044-2116730834",
H2: "2122053282-2133204808",
H3: "2133604274-2140756116",
H4: "2143656228-2147444225",
I1: "<r 2><b 0x858000010001000000000669636c6f756403636f6d0000010001c00c000100010000105a00044d583737>",
I2: "", I3: "", I4: "", I5: "",
};
function readAwgParams(): AwgParams {
const confFile = path.join("/etc/amnezia/amneziawg", "awg1.conf");
const params: AwgParams = { ...DEFAULT_AWG_PARAMS };
if (!existsSync(confFile)) {
logger.warn("awg1.conf не найден — параметры обфускации по умолчанию");
return params;
}
const iface = readFileSync(confFile, "utf8").split(/^\[Peer\]/m)[0];
const numKeys: (keyof AwgParams)[] = ["Jc", "Jmin", "Jmax", "S1", "S2", "S3", "S4"];
const strKeys: (keyof AwgParams)[] = ["H1", "H2", "H3", "H4", "I1", "I2", "I3", "I4", "I5"];
for (const k of numKeys) {
const m = iface.match(new RegExp(`^\\s*${k}\\s*=\\s*(\\d+)`, "m"));
if (m) (params[k] as number) = Number(m[1]);
}
for (const k of strKeys) {
const m = iface.match(new RegExp(`^\\s*${k}\\s*=\\s*(.*)$`, "m"));
if (m) (params[k] as string) = m[1].trim();
}
logger.info("awg params loaded from conf", { Jc: params.Jc, H1: params.H1 });
return params;
}
const runtimeConfig = initConfig();
const CONFIG = {
interface: "awg1",
confDir: "/etc/amnezia/amneziawg",
subnet: "10.9",
serverIp: runtimeConfig.serverIp,
serverPort: runtimeConfig.serverPort,
serverName: runtimeConfig.serverName,
dns1: "1.1.1.1",
dns2: "1.0.0.1",
mtu: 1376,
keepalive: 25,
awgParams: readAwgParams(),
};
interface UserRow {
name: string;
ip: string;
pub_key: string;
vpn_key: string;
psk_key: string;
}
const stmts = {
get: db.prepare<[string], UserRow>("SELECT * FROM users WHERE name = ?"),
insert: db.prepare<[string, string, string, string, string]>("INSERT INTO users (name, ip, pub_key, vpn_key, psk_key) VALUES (?, ?, ?, ?, ?)"),
delete: db.prepare<[string]>("DELETE FROM users WHERE name = ?"),
ips: db.prepare<[], { ip: string }>("SELECT ip FROM users"),
};
function run(cmd: string): string {
return execSync(cmd, { encoding: "utf8" }).trim();
}
function generateKeys() {
const privateKey = run("umask 077 && awg genkey");
const r = spawnSync("awg", ["pubkey"], { input: privateKey, encoding: "utf8" });
if (r.status !== 0) throw new Error("awg pubkey завершился с ошибкой");
const publicKey = (r.stdout as string).trim();
const presharedKey = run("awg genpsk");
return { privateKey, publicKey, presharedKey };
}
function getServerPublicKey(): string {
const f = path.join(CONFIG.confDir, "server_public.key");
if (!existsSync(f)) throw new Error("server_public.key не найден");
return readFileSync(f, "utf8").trim();
}
function nextIp(): string {
const usedIps = new Set(stmts.ips.all().map((r: { ip: string }) => r.ip));
for (let c = 0; c <= 255; c++)
for (let d = 2; d <= 254; d++) {
const ip = `${CONFIG.subnet}.${c}.${d}`;
if (!usedIps.has(ip)) return ip;
}
throw new Error("Подсеть заполнена");
}
// Официальный формат .conf: PrivateKey → AWG params (Jc,S,H,I) → Address → DNS
// ВНИМАНИЕ: пустые I2–I5 должны выводиться как «I2 = » с ОДНИМ хвостовым пробелом
// (так в рабочих ключах Amnezia). Пробел даётся через ${" "}, чтобы его не срезали
// ни IDE (strip trailing whitespace), ни инструменты правки. Не «чистить»!
function buildClientConf(
keys: ReturnType<typeof generateKeys>,
ip: string,
serverPub: string,
): string {
const p = CONFIG.awgParams;
return `[Interface]
PrivateKey = ${keys.privateKey}
Jc = ${p.Jc}
Jmin = ${p.Jmin}
Jmax = ${p.Jmax}
S1 = ${p.S1}
S2 = ${p.S2}
S3 = ${p.S3}
S4 = ${p.S4}
H1 = ${p.H1}
H2 = ${p.H2}
H3 = ${p.H3}
H4 = ${p.H4}
I1 = ${p.I1}
I2 =${" "}
I3 =${" "}
I4 =${" "}
I5 =${" "}
Address = ${ip}/32
DNS = ${CONFIG.dns1}, ${CONFIG.dns2}
[Peer]
PublicKey = ${serverPub}
PresharedKey = ${keys.presharedKey}
AllowedIPs = 0.0.0.0/0, ::/0
Endpoint = ${CONFIG.serverIp}:${CONFIG.serverPort}
PersistentKeepalive = ${CONFIG.keepalive}
`;
}
function encodeVpnKey(
keys: ReturnType<typeof generateKeys>,
ip: string,
serverPub: string,
): string {
const p = CONFIG.awgParams;
const clientConf = buildClientConf(keys, ip, serverPub);
const lastConfigObj = {
H1: p.H1, H2: p.H2, H3: p.H3, H4: p.H4,
I1: p.I1, I2: "", I3: "", I4: "", I5: "",
Jc: String(p.Jc),
Jmax: String(p.Jmax),
Jmin: String(p.Jmin),
S1: String(p.S1), S2: String(p.S2), S3: String(p.S3), S4: String(p.S4),
allowed_ips: ["0.0.0.0/0", "::/0"],
clientId: keys.publicKey,
client_ip: ip,
client_priv_key: keys.privateKey,
client_pub_key: keys.publicKey,
config: clientConf,
hostName: CONFIG.serverIp,
mtu: String(CONFIG.mtu),
persistent_keep_alive: String(CONFIG.keepalive),
port: CONFIG.serverPort,
psk_key: keys.presharedKey,
server_pub_key: serverPub,
};
const json = JSON.stringify({
containers: [{
container: "amnezia-awg2",
awg: {
H1: p.H1, H2: p.H2, H3: p.H3, H4: p.H4,
I1: p.I1, I2: "", I3: "", I4: "", I5: "",
Jc: String(p.Jc),
Jmax: String(p.Jmax),
Jmin: String(p.Jmin),
S1: String(p.S1), S2: String(p.S2),
S3: String(p.S3), S4: String(p.S4),
last_config: JSON.stringify(lastConfigObj, null, 2),
port: String(CONFIG.serverPort),
protocol_version: "2",
subnet_address: `${CONFIG.subnet}.0.0`,
transport_proto: "udp",
},
}],
defaultContainer: "amnezia-awg2",
description: CONFIG.serverName,
dns1: CONFIG.dns1,
dns2: CONFIG.dns2,
hostName: CONFIG.serverIp,
nameOverriddenByUser: true,
});
const jsonBuf = Buffer.from(json, "utf8");
const compressed = zlib.deflateSync(jsonBuf);
const header = Buffer.alloc(4);
header.writeUInt32BE(jsonBuf.length, 0);
return "vpn://" + Buffer.concat([header, compressed])
.toString("base64url")
.replace(/=+$/, "");
}
function getPeersData(): Record<string, { online: boolean; lastHandshake: number; rx: number; tx: number }> {
try {
const output = run(`awg show ${CONFIG.interface} dump`);
const result: Record<string, { online: boolean; lastHandshake: number; rx: number; tx: number }> = {};
const now = Math.floor(Date.now() / 1000);
const lines = output.split("\n");
for (let i = 1; i < lines.length; i++) {
const parts = lines[i].split("\t");
const pubKey = parts[0];
if (!pubKey) continue;
const lastHandshake = Number(parts[4]);
const rx = Number(parts[5]);
const tx = Number(parts[6]);
result[pubKey] = {
online: lastHandshake > 0 && (now - lastHandshake) < 180,
lastHandshake, rx, tx,
};
}
return result;
} catch (e) { logger.warn("getPeersData failed", { error: e }); return {}; }
}
function rebuildConf() {
const users = db.prepare("SELECT name, ip, pub_key, psk_key FROM users").all() as UserRow[];
const confFile = path.join(CONFIG.confDir, `${CONFIG.interface}.conf`);
if (!existsSync(confFile)) return;
const conf = readFileSync(confFile, "utf8");
const iface = conf.split(/^\[Peer\]/m)[0].trimEnd();
const peers = (users as any[]).map(u =>
`\n# ${u.name}\n[Peer]\nPublicKey = ${u.pub_key}\nPresharedKey = ${u.psk_key}\nAllowedIPs = ${u.ip}/32\nPersistentKeepalive = ${CONFIG.keepalive}`
).join("\n");
writeFileSync(confFile, iface + "\n" + peers + "\n");
logger.info("conf rebuilt", { peers: users.length });
}
const SERVER_PRIV_KEY_FILE = "/etc/amnezia/server_private.key";
const AWGQUICK_ONLY_KEY = /^\s*(Address|DNS|MTU|Table|PreUp|PostUp|PreDown|PostDown|SaveConfig)\s*=/i;
// Готовит «stripped»-конфиг для `awg syncconf`: берёт awg1.conf, выкидывает
// awg-quick-ключи и оставляет [Interface] (PrivateKey + Jc/S/H + ListenPort) и
// [Peer]-блоки.
// 🛑 КРИТИЧНО: [Interface] с PrivateKey ОБЯЗАН попасть в этот конфиг. Раньше
// syncPeers отдавал в syncconf только [Peer]-блоки — и AmneziaWG обнулял
// приватный ключ интерфейса и параметры обфускации, после чего сервер
// поднимался с public-key=(none) и ВСЕ клиенты отваливались.
// PrivateKey подставляем из server_private.key — это та же идентичность, что в
// server_public.key (его зашивают в vpn:// ключи клиентов) и в PostUp.
function buildSyncConf(): string {
const confFile = path.join(CONFIG.confDir, `${CONFIG.interface}.conf`);
const priv = readFileSync(SERVER_PRIV_KEY_FILE, "utf8").trim();
const out: string[] = [];
let privReplaced = false;
for (const line of readFileSync(confFile, "utf8").split("\n")) {
if (AWGQUICK_ONLY_KEY.test(line)) continue;
if (/^\s*PrivateKey\s*=/.test(line)) {
out.push(`PrivateKey = ${priv}`);
privReplaced = true;
continue;
}
out.push(line);
}
if (!privReplaced) {
const idx = out.findIndex(l => /^\s*\[Interface\]/.test(l));
if (idx >= 0) out.splice(idx + 1, 0, `PrivateKey = ${priv}`);
}
return out.join("\n");
}
function syncPeers() {
rebuildConf();
const tmpFile = `/tmp/awg_sync_${Date.now()}.conf`;
try {
writeFileSync(tmpFile, buildSyncConf(), { mode: 0o600 });
const r = spawnSync("awg", ["syncconf", CONFIG.interface, tmpFile]);
if (r.status !== 0) logger.warn("syncPeers syncconf failed", { stderr: r.stderr?.toString() });
} finally {
try { fs.unlinkSync(tmpFile); } catch {}
}
const n = (db.prepare("SELECT COUNT(*) AS n FROM users").get() as { n: number }).n;
logger.info("peers synced", { count: n });
}
function getInterfaceStatus(): { up: boolean; peers: number; publicKey: string | null } {
const r = spawnSync("awg", ["show", CONFIG.interface]);
if (r.status !== 0) return { up: false, peers: 0, publicKey: null };
const output = r.stdout.toString();
const peers = (output.match(/^peer:/gm) ?? []).length;
const publicKey = output.match(/public key:\s*(.+)/)?.[1]?.trim() ?? null;
return { up: true, peers, publicKey };
}
function ensureInterfaceUp() {
const { up } = getInterfaceStatus();
if (!up) throw new Error(`Interface ${CONFIG.interface} is not up. Run: awg-quick up ${CONFIG.interface}`);
}
function restartAwg() {
logger.info("AWG restart: down");
const down = spawnSync("awg-quick", ["down", CONFIG.interface]);
if (down.status !== 0) logger.warn("awg-quick down failed", { stderr: down.stderr?.toString() });
logger.info("AWG restart: up");
const up = spawnSync("awg-quick", ["up", CONFIG.interface]);
if (up.status !== 0) throw new Error(`awg-quick up failed: ${up.stderr?.toString()}`);
syncPeers();
logger.info("AWG restart: done");
}
function startInterface() {
const status = getInterfaceStatus();
if (status.up) { logger.info("AWG already up", { peers: status.peers }); return status; }
const r = spawnSync("awg-quick", ["up", CONFIG.interface]);
if (r.status !== 0) throw new Error(`awg-quick up failed: ${r.stderr?.toString()}`);
syncPeers();
return getInterfaceStatus();
}
function addUser(username: string): UserRow {
const keys = generateKeys();
const serverPub = getServerPublicKey();
const ip = db.transaction(() => {
const ip = nextIp();
stmts.insert.run(username, ip, keys.publicKey, "", keys.presharedKey);
return ip;
})();
const vpn_key = encodeVpnKey(keys, ip, serverPub);
db.prepare("UPDATE users SET vpn_key = ? WHERE name = ?").run(vpn_key, username);
const tmpPsk = `/tmp/awg_psk_${Date.now()}.tmp`;
writeFileSync(tmpPsk, keys.presharedKey);
const r = spawnSync("awg", [
"set", CONFIG.interface, "peer", keys.publicKey,
"preshared-key", tmpPsk,
"allowed-ips", `${ip}/32`,
"persistent-keepalive", String(CONFIG.keepalive),
]);
try { fs.unlinkSync(tmpPsk); } catch {}
if (r.status !== 0) {
stmts.delete.run(username);
throw new Error(`awg set failed: ${r.stderr?.toString()}`);
}
rebuildConf();
logger.info("user created", { name: username, ip });
return { name: username, ip, pub_key: keys.publicKey, vpn_key, psk_key: keys.presharedKey };
}
function removeUser(username: string) {
const user = stmts.get.get(username);
if (!user) throw new Error("Пользователь не найден");
stmts.delete.run(username);
spawnSync("awg", ["set", CONFIG.interface, "peer", user.pub_key, "remove"]);
rebuildConf();
for (const ext of [".conf", ".key"]) {
const f = path.join(CONFIG.confDir, "clients", username + ext);
if (existsSync(f)) fs.unlinkSync(f);
}
logger.info("user removed", { name: username });
}
const app = express();
app.use(express.json({ limit: "1kb" }));
function verifyInternalToken(token: string): boolean {
try {
const [h, p, s] = token.split(".");
if (!h || !p || !s) return false;
const ok = crypto.verify(null, Buffer.from(`${h}.${p}`), internalAuthPubKey, Buffer.from(s, "base64url"));
if (!ok) return false;
const { exp } = JSON.parse(Buffer.from(p, "base64url").toString()) as { exp: number };
return exp > Math.floor(Date.now() / 1000);
} catch { return false; }
}
function auth(req: Request, res: Response, next: NextFunction) {
const header = (req.headers["authorization"] ?? "") as string;
const token = header.startsWith("Bearer ") ? header.slice(7) : "";
if (!token || !verifyInternalToken(token)) {
res.status(401).json({ error: "Неверная авторизация" }); return;
}
next();
}
function validateName(req: Request, res: Response, next: NextFunction) {
const name = req.params.name ?? (req.body as { name?: string }).name;
if (!name || !/^[a-zA-Z0-9_-]{1,32}$/.test(name)) {
res.status(400).json({ error: "Имя: буквы, цифры, _ и -, до 32 символов" }); return;
}
next();
}
function handler(fn: (req: Request, res: Response) => void | Promise<void>) {
return async (req: Request, res: Response) => {
try { await fn(req, res); }
catch (e) { logger.error("handler error", { error: e }); res.status(500).json({ error: "Internal server error" }); }
};
}
app.get("/health", (_req, res) => {
const { up, peers } = getInterfaceStatus();
res.status(up ? 200 : 503).json({
status: up ? "ok" : "degraded",
server: CONFIG.serverName,
ip: CONFIG.serverIp,
awg: { status: up ? "ok" : "down", peers },
});
});
app.post("/api/users", auth, validateName, handler((req, res) => {
const { name } = req.body as { name: string };
if (stmts.get.get(name)) {
res.status(409).json({ error: "Пользователь уже существует" }); return;
}
res.status(201).json(addUser(name));
}));
app.get("/api/users", auth, handler((_req, res) => {
const users = db.prepare("SELECT name, ip, pub_key, vpn_key FROM users WHERE vpn_key != ''").all() as UserRow[];
const peers = getPeersData();
res.json({
users: users.map(u => ({
...u,
online: peers[u.pub_key]?.online ?? false,
lastHandshake: peers[u.pub_key]?.lastHandshake ?? 0,
})),
});
}));
app.get("/api/users/stats", auth, handler((_req, res) => {
const users = db.prepare("SELECT name, ip, pub_key FROM users WHERE vpn_key != ''").all() as UserRow[];
const peers = getPeersData();
res.json({
users: users.map(u => ({
name: u.name,
ip: u.ip,
online: peers[u.pub_key]?.online ?? false,
lastHandshake: peers[u.pub_key]?.lastHandshake ?? 0,
rx: peers[u.pub_key]?.rx ?? 0,
tx: peers[u.pub_key]?.tx ?? 0,
})),
});
}));
app.post("/api/users/:name", auth, validateName, handler((req, res) => {
const user = stmts.get.get(req.params.name);
if (!user) { res.status(404).json({ error: "Пользователь не найден" }); return; }
res.json(user);
}));
app.delete("/api/users/:name", auth, validateName, handler((req, res) => {
removeUser(req.params.name);
res.json({ success: true, name: req.params.name });
}));
app.post("/awg/restart", auth, handler((_req, res) => {
restartAwg();
res.json({ success: true });
}));
app.get("/awg/status", auth, handler((_req, res) => {
res.json(getInterfaceStatus());
}));
app.post("/awg/start", auth, handler((_req, res) => {
res.json(startInterface());
}));
app.listen(SERVER.port, "127.0.0.1", () => {
logger.info("Server started", { port: SERVER.port, host: "127.0.0.1", serverName: CONFIG.serverName, serverIp: CONFIG.serverIp });
});
ensureInterfaceUp();
syncPeers();