freezmo/next.config.ts
Martin Dvorak 8822baf4b7 Security: model budget + concurrency caps, SSRF guards, spoof-proof limits
Audit pass with the threats that actually apply to a self-hosted, account-less
app: getting the Ollama key throttled or banned, and someone grinding the app
down. Per-route windows already existed; these are the missing layers.

- lib/model-guard.ts: every route that spends a model call now takes a slot —
  60 calls per window across all clients (RATE_LIMIT_MODEL_TOTAL), 3 in flight
  per IP, 6 in total — and the slot is released when the call finishes, on
  errors and on client disconnects. Over the concurrency cap answers 429
  kind=busy, not a punishment. Slots are taken after every cheap rejection so
  a malformed request cannot hold one (found by the new suite: early 400s
  were leaking slots).
- Images must be base64 data URLs (dataUrlSchema in lib/schemas): a plain URL
  in an images field made Ollama fetch an arbitrary address on our behalf.
- Push endpoints must be a real push service (PUSH_ALLOWED_HOSTS, defaulting
  to FCM/Mozilla/Apple/WNS): the server POSTs to whatever is stored.
- The rate-limit identity is the LAST x-forwarded-for hop. Reading the first
  let a client spoof its own IP and dodge every per-IP limit.
- Disk guards: reports.jsonl stops at REPORTS_MAX_BYTES (8 MB), reminder
  devices cap at PUSH_MAX_SUBSCRIPTIONS (50).
- Security headers: frame-ancestors 'none' + X-Frame-Options DENY, nosniff, a
  referrer policy and a Permissions-Policy without camera/mic/geo/payment.

New tests/security-test.mjs (13 checks, registered in run-all) proves each
guard against a slow stub Ollama with deliberately tiny limits. README:
security notes + rate-limit tables updated. Version 0.1.3, SW -> v51.
2026-10-12 20:40:57 +00:00

57 lines
2 KiB
TypeScript

import type { NextConfig } from "next";
/**
* Freezmo is meant to be opened from a phone on the same network, so the dev
* server should accept dev-asset requests coming from private hostnames.
* Production builds are not affected by this option.
*
* Add your own hostname here if Next still warns about a cross-origin request.
*/
const nextConfig: NextConfig = {
/**
* Dev and production never share a build folder: the dev service runs with
* NEXT_DIST_DIR=.next-dev (see deploy/freezmo-dev.service), while a manual
* `npm run build` keeps producing .next for the test suites. A production
* build can therefore never clobber the running dev server, and the other
* way around.
*/
distDir: process.env.NEXT_DIST_DIR || ".next",
/**
* Releases ship as self-contained standalone output: scripts/deploy.sh
* copies public/ and .next/static next to `.next/standalone/server.js` and
* runs that. `next start` keeps working too, so the existing workflows and
* the e2e suites are unaffected.
*/
output: "standalone",
/**
* Security headers. The app has no accounts, so these are about containment:
* never framed (clickjacking), never sniffed into a script, and no camera,
* microphone or location access it does not need (the camera button uses a
* file input with `capture`, which is not gated by Permissions-Policy).
*/
async headers() {
return [
{
source: "/(.*)",
headers: [
{ key: "X-Frame-Options", value: "DENY" },
{ key: "Content-Security-Policy", value: "frame-ancestors 'none'" },
{ key: "X-Content-Type-Options", value: "nosniff" },
{ key: "Referrer-Policy", value: "strict-origin-when-cross-origin" },
{ key: "Permissions-Policy", value: "camera=(), microphone=(), geolocation=(), payment=()" },
],
},
];
},
allowedDevOrigins: [
"127.0.0.1",
"localhost",
"*.local",
"**.local",
"192.168.*.*",
"10.*.*.*",
"*.ts.net", // Tailscale
],
};
export default nextConfig;