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Fix IP address rate limit (#8758)

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* Fix IP address rate limit

* CHANGELOG

* Tune getIpHash
This commit is contained in:
MeiMei
2022-05-31 17:44:22 +09:00
committed by GitHub
parent a98194bf1b
commit c05723ca6a
4 changed files with 15 additions and 10 deletions
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9
packages/backend/src/misc/get-ip-hash.ts Normal file
View File

@@ -0,0 +1,9 @@
import IPCIDR from 'ip-cidr';
export function getIpHash(ip: string) {
// because a single person may control many IPv6 addresses,
// only a /64 subnet prefix of any IP will be taken into account.
// (this means for IPv4 the entire address is used)
const prefix = IPCIDR.createAddress(ip).mask(64);
return 'ip-' + BigInt('0b' + prefix).toString(36);
}

11
packages/backend/src/server/api/call.ts
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@@ -6,7 +6,7 @@ import endpoints, { IEndpointMeta } from './endpoints.js';
import { ApiError } from './error.js';
import { apiLogger } from './logger.js';
import { AccessToken } from '@/models/entities/access-token.js';
import IPCIDR from 'ip-cidr';
import { getIpHash } from '@/misc/get-ip-hash.js';
const accessDenied = {
message: 'Access denied.',
@@ -33,18 +33,13 @@ export default async (endpoint: string, user: CacheableLocalUser | null | undefi
throw new ApiError(accessDenied);
}
if (ep.meta.requireCredential && ep.meta.limit && !isModerator) {
if (ep.meta.limit && !isModerator) {
// koa will automatically load the `X-Forwarded-For` header if `proxy: true` is configured in the app.
let limitActor: string;
if (user) {
limitActor = user.id;
} else {
// because a single person may control many IPv6 addresses,
// only a /64 subnet prefix of any IP will be taken into account.
// (this means for IPv4 the entire address is used)
const ip = IPCIDR.createAddress(ctx.ip).mask(64);
limitActor = 'ip-' + parseInt(ip, 2).toString(36);
limitActor = getIpHash(ctx!.ip);
}
const limit = Object.assign({}, ep.meta.limit);

3
packages/backend/src/server/api/private/signin.ts
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@@ -10,6 +10,7 @@ import { verifyLogin, hash } from '../2fa.js';
import { randomBytes } from 'node:crypto';
import { IsNull } from 'typeorm';
import { limiter } from '../limiter.js';
import { getIpHash } from '@/misc/get-ip-hash.js';
export default async (ctx: Koa.Context) => {
ctx.set('Access-Control-Allow-Origin', config.url);
@@ -27,7 +28,7 @@ export default async (ctx: Koa.Context) => {
try {
// not more than 1 attempt per second and not more than 10 attempts per hour
await limiter({ key: 'signin', duration: 60 * 60 * 1000, max: 10, minInterval: 1000 }, ctx.ip);
await limiter({ key: 'signin', duration: 60 * 60 * 1000, max: 10, minInterval: 1000 }, getIpHash(ctx.ip));
} catch (err) {
ctx.status = 429;
ctx.body = {