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merge: import upstream ssrf fix on our stable (!425)

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View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/425

Approved-by: Leah <kevinlukej@gmail.com>
Approved-by: Amelia Yukii <amelia.yukii@shourai.de>
This commit is contained in:
Amelia Yukii 2024-02-17 13:06:47 +00:00
commit 11d9fd9199
9 changed files with 196 additions and 23 deletions
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2
package.json
View file

@ -1,6 +1,6 @@
{
"name": "sharkey",
"version": "2023.12.0",
"version": "2023.12.1",
"codename": "shonk",
"repository": {
"type": "git",

55
packages/backend/src/core/HttpRequestService.ts
View file

@ -14,9 +14,16 @@ import { DI } from '@/di-symbols.js';
import type { Config } from '@/config.js';
import { StatusError } from '@/misc/status-error.js';
import { bindThis } from '@/decorators.js';
import { validateContentTypeSetAsActivityPub } from '@/core/activitypub/misc/validator.js';
import type { IObject } from '@/core/activitypub/type.js';
import type { Response } from 'node-fetch';
import type { URL } from 'node:url';
export type HttpRequestSendOptions = {
throwErrorWhenResponseNotOk: boolean;
validators?: ((res: Response) => void)[];
};
@Injectable()
export class HttpRequestService {
/**
@ -104,6 +111,23 @@ export class HttpRequestService {
}
}
@bindThis
public async getActivityJson(url: string): Promise<IObject> {
const res = await this.send(url, {
method: 'GET',
headers: {
Accept: 'application/activity+json, application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
},
timeout: 5000,
size: 1024 * 256,
}, {
throwErrorWhenResponseNotOk: true,
validators: [validateContentTypeSetAsActivityPub],
});
return await res.json() as IObject;
}
@bindThis
public async getJson<T = unknown>(url: string, accept = 'application/json, */*', headers?: Record<string, string>): Promise<T> {
const res = await this.send(url, {
@ -132,17 +156,20 @@ export class HttpRequestService {
}
@bindThis
public async send(url: string, args: {
method?: string,
body?: string,
headers?: Record<string, string>,
timeout?: number,
size?: number,
} = {}, extra: {
throwErrorWhenResponseNotOk: boolean;
} = {
throwErrorWhenResponseNotOk: true,
}): Promise<Response> {
public async send(
url: string,
args: {
method?: string,
body?: string,
headers?: Record<string, string>,
timeout?: number,
size?: number,
} = {},
extra: HttpRequestSendOptions = {
throwErrorWhenResponseNotOk: true,
validators: [],
},
): Promise<Response> {
const timeout = args.timeout ?? 5000;
const controller = new AbortController();
@ -166,6 +193,12 @@ export class HttpRequestService {
throw new StatusError(`${res.status} ${res.statusText}`, res.status, res.statusText);
}
if (res.ok) {
for (const validator of (extra.validators ?? [])) {
validator(res);
}
}
return res;
}
}

6
packages/backend/src/core/activitypub/ApRequestService.ts
View file

@ -14,6 +14,7 @@ import { HttpRequestService } from '@/core/HttpRequestService.js';
import { LoggerService } from '@/core/LoggerService.js';
import { bindThis } from '@/decorators.js';
import type Logger from '@/logger.js';
import { validateContentTypeSetAsActivityPub } from '@/core/activitypub/misc/validator.js';
type Request = {
url: string;
@ -66,7 +67,7 @@ export class ApRequestCreator {
url: u.href,
method: 'GET',
headers: this.#objectAssignWithLcKey({
'Accept': 'application/activity+json, application/ld+json',
'Accept': 'application/activity+json, application/ld+json; profile="https://www.w3.org/ns/activitystreams"',
'Date': new Date().toUTCString(),
'Host': new URL(args.url).host,
}, args.additionalHeaders),
@ -190,6 +191,9 @@ export class ApRequestService {
const res = await this.httpRequestService.send(url, {
method: req.request.method,
headers: req.request.headers,
}, {
throwErrorWhenResponseNotOk: true,
validators: [validateContentTypeSetAsActivityPub],
});
return await res.json();

2
packages/backend/src/core/activitypub/ApResolverService.ts
View file

@ -105,7 +105,7 @@ export class Resolver {
const object = (this.user
? await this.apRequestService.signedGet(value, this.user) as IObject
: await this.httpRequestService.getJson(value, 'application/activity+json, application/ld+json')) as IObject;
: await this.httpRequestService.getActivityJson(value)) as IObject;
if (
Array.isArray(object['@context']) ?

6
packages/backend/src/core/activitypub/LdSignatureService.ts
View file

@ -8,6 +8,7 @@ import { Injectable } from '@nestjs/common';
import { HttpRequestService } from '@/core/HttpRequestService.js';
import { bindThis } from '@/decorators.js';
import { CONTEXTS } from './misc/contexts.js';
import { validateContentTypeSetAsJsonLD } from './misc/validator.js';
import type { JsonLdDocument } from 'jsonld';
import type { JsonLd, RemoteDocument } from 'jsonld/jsonld-spec.js';
@ -133,7 +134,10 @@ class LdSignature {
},
timeout: this.loderTimeout,
},
{ throwErrorWhenResponseNotOk: false },
{
throwErrorWhenResponseNotOk: false,
validators: [validateContentTypeSetAsJsonLD],
},
).then(res => {
if (!res.ok) {
throw new Error(`${res.status} ${res.statusText}`);

39
packages/backend/src/core/activitypub/misc/validator.ts Normal file
View file

@ -0,0 +1,39 @@
/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
import type { Response } from 'node-fetch';
export function validateContentTypeSetAsActivityPub(response: Response): void {
const contentType = (response.headers.get('content-type') ?? '').toLowerCase();
if (contentType === '') {
throw new Error('Validate content type of AP response: No content-type header');
}
if (
contentType.startsWith('application/activity+json') ||
(contentType.startsWith('application/ld+json;') && contentType.includes('https://www.w3.org/ns/activitystreams'))
) {
return;
}
throw new Error('Validate content type of AP response: Content type is not application/activity+json or application/ld+json');
}
const plusJsonSuffixRegex = /^\s*(application|text)\/[a-zA-Z0-9\.\-\+]+\+json\s*(;|$)/;
export function validateContentTypeSetAsJsonLD(response: Response): void {
const contentType = (response.headers.get('content-type') ?? '').toLowerCase();
if (contentType === '') {
throw new Error('Validate content type of JSON LD: No content-type header');
}
if (
contentType.startsWith('application/ld+json') ||
contentType.startsWith('application/json') ||
plusJsonSuffixRegex.test(contentType)
) {
return;
}
throw new Error('Validate content type of JSON LD: Content type is not application/ld+json or application/json');
}

40
packages/backend/test/e2e/fetch-validate-ap-deny.ts Normal file
View file

@ -0,0 +1,40 @@
/*
* SPDX-FileCopyrightText: syuilo and misskey-project
* SPDX-License-Identifier: AGPL-3.0-only
*/
process.env.NODE_ENV = 'test';
import { validateContentTypeSetAsActivityPub, validateContentTypeSetAsJsonLD } from '@/core/activitypub/misc/validator.js';
import { signup, uploadFile, relativeFetch } from '../utils.js';
import type * as misskey from 'misskey-js';
describe('validateContentTypeSetAsActivityPub/JsonLD (deny case)', () => {
let alice: misskey.entities.SignupResponse;
let aliceUploadedFile: any;
beforeAll(async () => {
alice = await signup({ username: 'alice' });
aliceUploadedFile = await uploadFile(alice);
}, 1000 * 60 * 2);
test('ActivityStreams: ファイルはエラーになる', async () => {
const res = await relativeFetch(aliceUploadedFile.webpublicUrl);
function doValidate() {
validateContentTypeSetAsActivityPub(res);
}
expect(doValidate).toThrow('Content type is not');
});
test('JSON-LD: ファイルはエラーになる', async () => {
const res = await relativeFetch(aliceUploadedFile.webpublicUrl);
function doValidate() {
validateContentTypeSetAsJsonLD(res);
}
expect(doValidate).toThrow('Content type is not');
});
});

2
packages/backend/test/unit/activitypub.ts
View file

@ -202,7 +202,7 @@ describe('ActivityPub', () => {
describe('Renderer', () => {
test('Render an announce with visibility: followers', () => {
rendererService.renderAnnounce(null, {
rendererService.renderAnnounce('https://example.com/notes/00example', {
id: genAidx(Date.now()),
visibility: 'followers',
} as MiNote);

67
packages/backend/test/utils.ts
View file

@ -13,6 +13,8 @@ import fetch, { File, RequestInit } from 'node-fetch';
import { DataSource } from 'typeorm';
import { JSDOM } from 'jsdom';
import { DEFAULT_POLICIES } from '@/core/RoleService.js';
import { Packed } from '@/misc/json-schema.js';
import { validateContentTypeSetAsActivityPub } from '@/core/activitypub/misc/validator.js';
import { entities } from '../src/postgres.js';
import { loadConfig } from '../src/config.js';
import type * as misskey from 'misskey-js';
@ -110,6 +112,20 @@ export function randomString(chars = 'abcdefghijklmnopqrstuvwxyz0123456789', len
return randomString;
}
/**
* @brief プロミスにタイムアウト追加
* @param p 待ち対象プロミス
* @param timeout 待機ミリ秒
*/
function timeoutPromise<T>(p: Promise<T>, timeout: number): Promise<T> {
return Promise.race([
p,
new Promise((reject) => {
setTimeout(() => { reject(new Error('timed out')); }, timeout);
}) as never,
]);
}
export const signup = async (params?: Partial<misskey.Endpoints['signup']['req']>): Promise<NonNullable<misskey.Endpoints['signup']['res']>> => {
const q = Object.assign({
username: randomString(),
@ -304,7 +320,6 @@ export const uploadFile = async (user?: UserToken, { path, name, blob }: UploadO
});
const body = res.status !== 204 ? await res.json() as misskey.Endpoints['drive/files/create']['res'] : null;
return {
status: res.status,
headers: res.headers,
@ -317,12 +332,13 @@ export const uploadUrl = async (user: UserToken, url: string) => {
const file = new Promise(ok => resolve = ok);
const marker = Math.random().toString();
const ws = await connectStream(user, 'main', (msg) => {
if (msg.type === 'urlUploadFinished' && msg.body.marker === marker) {
ws.close();
resolve(msg.body.file);
}
});
const catcher = makeStreamCatcher(
user,
'main',
(msg) => msg.type === 'urlUploadFinished' && msg.body.marker === marker,
(msg) => msg.body.file as Packed<'DriveFile'>,
60 * 1000,
);
await api('drive/files/upload-from-url', {
url,
@ -402,6 +418,35 @@ export const waitFire = async (user: UserToken, channel: string, trgr: () => any
});
};
/**
* @brief WebSocketストリームから特定条件の通知を拾うプロミスを生成
* @param user ユーザー認証情報
* @param channel チャンネル
* @param cond 条件
* @param extractor 取り出し処理
* @param timeout ミリ秒タイムアウト
* @returns 時間内に正常に処理できた場合に通知からextractorを通した値を得る
*/
export function makeStreamCatcher<T>(
user: UserToken,
channel: string,
cond: (message: Record<string, any>) => boolean,
extractor: (message: Record<string, any>) => T,
timeout = 60 * 1000): Promise<T> {
let ws: WebSocket;
const p = new Promise<T>(async (resolve) => {
ws = await connectStream(user, channel, (msg) => {
if (cond(msg)) {
resolve(extractor(msg));
}
});
}).finally(() => {
ws.close();
});
return timeoutPromise(p, timeout);
}
export type SimpleGetResponse = {
status: number,
body: any | JSDOM | null,
@ -425,6 +470,14 @@ export const simpleGet = async (path: string, accept = '*/*', cookie: any = unde
'text/html; charset=utf-8',
];
if (res.ok && (
accept.startsWith('application/activity+json') ||
(accept.startsWith('application/ld+json') && accept.includes('https://www.w3.org/ns/activitystreams'))
)) {
// validateContentTypeSetAsActivityPubのテストを兼ねる
validateContentTypeSetAsActivityPub(res);
}
const body =
jsonTypes.includes(res.headers.get('content-type') ?? '') ? await res.json() :
htmlTypes.includes(res.headers.get('content-type') ?? '') ? new JSDOM(await res.text()) :