Workflow-App/Workflow/app/api/auth/login/route.ts
sjcoetzeesj-coder b3eaeb7287 feat(auth): password gate replacing the IP-only middleware guard
middleware.ts previously 404'd every external request, which meant the
app was unusable once hosted. There are no per-user accounts, so this
adds a single-password gate:

- /login page + POST /api/auth/login, POST /api/auth/logout
- lib/auth.ts: HMAC-SHA256 signed session cookie (lib/auth), Web Crypto
  only so the same code runs in Edge middleware and Node handlers
- middleware now admits: the signing flow (unchanged, still public),
  /login + /api/auth/*, local requests, and valid sessions. Everything
  else redirects to /login (pages) or returns 401 JSON (API calls).
- password compared with a constant-time compare, wrong attempts
  delayed 600ms to slow online guessing
- cookie is HttpOnly + SameSite=Lax, 12h, Secure when x-forwarded-proto
  says https (Coolify serves the proxy on http today)

APP_PASSWORD / AUTH_SECRET added to .env.example, with a warning: an
unquoted # in an env value starts a comment, which silently truncated
the first generated password and made login fail.

Verified against a real built server: anon->307 /login, anon API->401,
wrong password->401, correct password->200+cookie, signed-in request
reaches PocketBase, /resign/ still 200 without a cookie, forged
cookie->401.
2026-10-18 18:39:27 +02:00

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TypeScript

// app/api/auth/login/route.ts
// POST — exchanges APP_PASSWORD for a signed session cookie.
//
// This is the only place the password is compared, and it happens entirely
// on the server. The password is never sent anywhere except this app.
import { NextRequest, NextResponse } from "next/server";
import { createSessionToken, secretsMatch, SESSION_COOKIE, SESSION_TTL_SECONDS, sessionCookieOptions } from "@/lib/auth";
export const dynamic = "force-dynamic";
export async function POST(req: NextRequest) {
const expected = process.env.APP_PASSWORD;
const secret = process.env.AUTH_SECRET;
if (!expected || !secret) {
return NextResponse.json(
{ error: "Login is not configured. Set APP_PASSWORD and AUTH_SECRET." },
{ status: 503 }
);
}
let password = "";
try {
const body = await req.json();
if (typeof body?.password === "string") password = body.password;
} catch {
// fall through — empty password will simply fail the check
}
if (!secretsMatch(password, expected)) {
// Slow down online guessing; a wrong guess costs the caller ~0.6s.
await new Promise((r) => setTimeout(r, 600));
return NextResponse.json({ error: "Wrong password." }, { status: 401 });
}
const token = await createSessionToken(secret);
const res = NextResponse.json({ ok: true });
res.cookies.set(SESSION_COOKIE, token, sessionCookieOptions(req, SESSION_TTL_SECONDS));
return res;
}