From 5d77fa6f2666311c2c1c854e098dd91d28d5c664 Mon Sep 17 00:00:00 2001 From: nico Date: Wed, 26 Aug 2026 17:26:41 +0200 Subject: [PATCH] =?UTF-8?q?Login-Rate-Limit:=205=20Fehlversuche=20pro=20IP?= =?UTF-8?q?=20=E2=86=92=205=20Min=20Sperre=20(konfigurierbar)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .env.example | 3 + README.md | 2 + lib/config.js | 2 + package-lock.json | 1017 +++++++++++++++++++++++++++++++++++++++++++++ server.js | 64 ++- 5 files changed, 1082 insertions(+), 6 deletions(-) create mode 100644 package-lock.json diff --git a/.env.example b/.env.example index 21bf746..18775cf 100644 --- a/.env.example +++ b/.env.example @@ -17,3 +17,6 @@ THINKING=enabled # VAPID-Schlüsselpaar für Web Push (wird automatisch generiert) VAPID_PUBLIC_KEY= VAPID_PRIVATE_KEY= +# Login-Schutz: Fehlversuche pro IP bevor gesperrt wird, und Sperrdauer +LOGIN_MAX_ATTEMPTS=5 +LOGIN_LOCK_MINUTES=5 diff --git a/README.md b/README.md index da7dca8..a070e73 100644 --- a/README.md +++ b/README.md @@ -37,6 +37,8 @@ erzeugt und in die `.env` geschrieben. | `MODEL` | nein | Standard `deepseek-v4-flash` | | `THINKING` | nein | `enabled` (Standard) oder `disabled` | | `DEEPSEEK_BASE_URL` | nein | Für Tests/Proxies überschreibbar | +| `LOGIN_MAX_ATTEMPTS` | nein | Fehlversuche pro IP vor Sperre (Standard 5) | +| `LOGIN_LOCK_MINUTES` | nein | Sperrdauer nach Fehlversuchen (Standard 5) | ## Deployment mit Docker/Podman (empfohlen) diff --git a/lib/config.js b/lib/config.js index fe3f8bd..a89a135 100644 --- a/lib/config.js +++ b/lib/config.js @@ -55,6 +55,8 @@ const config = { model: process.env.MODEL || env.MODEL || 'deepseek-v4-flash', thinking: process.env.THINKING || env.THINKING || 'enabled', baseUrl: process.env.DEEPSEEK_BASE_URL || env.DEEPSEEK_BASE_URL || 'https://api.deepseek.com', + loginMaxAttempts: Number(process.env.LOGIN_MAX_ATTEMPTS || env.LOGIN_MAX_ATTEMPTS || 5), + loginLockMinutes: Number(process.env.LOGIN_LOCK_MINUTES || env.LOGIN_LOCK_MINUTES || 5), sessionSecret: ensure('SESSION_SECRET', () => crypto.randomBytes(32).toString('hex')), vapidPublicKey: vapid.publicKey, vapidPrivateKey: vapid.privateKey, diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..7d67432 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,1017 @@ +{ + "name": "research-chat", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "research-chat", + "version": "1.0.0", + "license": "ISC", + "dependencies": { + "express": "^4.19.2", + "playwright": "1.62.1", + "web-push": "^3.6.7" + } + }, + "node_modules/accepts": { + "version": "1.3.8", + "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz", + "integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==", + "license": "MIT", + "dependencies": { + "mime-types": "~2.1.34", + "negotiator": "0.6.3" + }, 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43d1e93..4d74019 100644 --- a/server.js +++ b/server.js @@ -68,17 +68,69 @@ app.use((req, res, next) => { next(); }); +// --------------------------------------------------------------------------- +// Login-Rate-Limit: X Fehlversuche pro IP → Y Minuten Sperre +// --------------------------------------------------------------------------- + +const loginAttempts = new Map(); // ip -> { count, lockedUntil } + +function checkLoginLock(ip) { + const entry = loginAttempts.get(ip); + if (entry && entry.lockedUntil > Date.now()) { + return Math.ceil((entry.lockedUntil - Date.now()) / 1000); + } + return 0; +} + +function registerLoginFail(ip) { + const entry = loginAttempts.get(ip) || { count: 0, lockedUntil: 0 }; + entry.count += 1; + if (entry.count >= config.loginMaxAttempts) { + entry.lockedUntil = Date.now() + config.loginLockMinutes * 60 * 1000; + entry.count = 0; + } + loginAttempts.set(ip, entry); +} + +function registerLoginOk(ip) { + loginAttempts.delete(ip); +} + +// Alte Einträge aufräumen (1×/Stunde) +setInterval(() => { + const now = Date.now(); + for (const [ip, entry] of loginAttempts) { + if (entry.lockedUntil <= now && entry.count === 0) loginAttempts.delete(ip); + } +}, 60 * 60 * 1000).unref(); + app.post('/api/login', (req, res) => { const { name, password } = req.body || {}; + const ip = req.ip; + + const lockSeconds = checkLoginLock(ip); + if (lockSeconds > 0) { + return res + .status(429) + .json({ error: `Zu viele Fehlversuche – bitte in ${lockSeconds} Sekunden erneut versuchen.` }); + } + const pw = String(config.appPassword || ''); - if (!pw || !password || password.length !== pw.length) { - return res.status(401).json({ error: 'Falsches Passwort' }); - } - const a = crypto.createHash('sha256').update(password).digest(); - const b = crypto.createHash('sha256').update(pw).digest(); - if (!crypto.timingSafeEqual(a, b)) { + const valid = + pw && + password && + password.length === pw.length && + crypto.timingSafeEqual( + crypto.createHash('sha256').update(String(password)).digest(), + crypto.createHash('sha256').update(pw).digest() + ); + + if (!valid) { + registerLoginFail(ip); return res.status(401).json({ error: 'Falsches Passwort' }); } + + registerLoginOk(ip); const safeName = String(name || 'Nutzer').slice(0, 40); const token = signToken({ n: safeName, exp: Date.now() + 30 * 24 * 3600 * 1000 }); res.cookie('research_auth', token, cookieOptions(req));