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Linus Rath
32280b9cc1
The admin login limit keys on the client IP taken from X-Forwarded-For. With no reverse proxy in front, that header is whatever the client sends (Next only fills it from the socket when the request carries none), so each forged address got a fresh bucket of five guesses. Route handlers cannot see the socket address, so the limiter now also stops at 50 attempts per 15 minutes across all clients. `.env.example` says why a proxy that appends the header is still needed for trustworthy per-IP limits and audit addresses.
45 lines
1.4 KiB
TypeScript
45 lines
1.4 KiB
TypeScript
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
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// The per-IP key is X-Forwarded-For, which a client writes itself when the
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// app is reachable without a reverse proxy: a fresh forged address used to
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// mean a fresh bucket of five guesses, without end.
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async function load() {
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vi.resetModules();
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return import('@/lib/admin/rate-limit');
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}
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describe('admin login rate limit', () => {
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beforeEach(() => {
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vi.useFakeTimers();
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});
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afterEach(() => {
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vi.useRealTimers();
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});
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it('allows five attempts per address', async () => {
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const { checkRateLimit } = await load();
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for (let i = 0; i < 5; i++) expect(checkRateLimit('203.0.113.1').allowed).toBe(true);
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expect(checkRateLimit('203.0.113.1').allowed).toBe(false);
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expect(checkRateLimit('203.0.113.2').allowed).toBe(true);
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});
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it('stops rotating forged addresses at the global ceiling', async () => {
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const { checkRateLimit } = await load();
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let allowed = 0;
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for (let i = 0; i < 200; i++) {
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if (checkRateLimit(`198.51.100.${i}`).allowed) allowed++;
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}
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expect(allowed).toBe(50);
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expect(checkRateLimit('192.0.2.77').allowed).toBe(false);
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});
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it('opens again after the window', async () => {
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const { checkRateLimit } = await load();
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for (let i = 0; i < 60; i++) checkRateLimit(`198.51.100.${i}`);
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vi.advanceTimersByTime(15 * 60 * 1000 + 1);
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expect(checkRateLimit('192.0.2.77').allowed).toBe(true);
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});
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});
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