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upd: change oauth

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Mar0xy 2023-09-24 19:47:12 +02:00
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3 changed files with 76 additions and 458 deletions
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2
packages/backend/package.json
View file

@ -167,6 +167,7 @@
"typeorm": "0.3.17", "typeorm": "0.3.17",
"typescript": "5.2.2", "typescript": "5.2.2",
"ulid": "2.3.0", "ulid": "2.3.0",
"uuid": "^9.0.1",
"vary": "1.1.2", "vary": "1.1.2",
"web-push": "3.6.6", "web-push": "3.6.6",
"ws": "8.14.2", "ws": "8.14.2",
@ -212,6 +213,7 @@
"@types/sinonjs__fake-timers": "8.1.2", "@types/sinonjs__fake-timers": "8.1.2",
"@types/tinycolor2": "1.4.4", "@types/tinycolor2": "1.4.4",
"@types/tmp": "0.2.4", "@types/tmp": "0.2.4",
"@types/uuid": "^9.0.4",
"@types/vary": "1.1.0", "@types/vary": "1.1.0",
"@types/web-push": "3.6.0", "@types/web-push": "3.6.0",
"@types/ws": "8.5.5", "@types/ws": "8.5.5",

520
packages/backend/src/server/oauth/OAuth2ProviderService.ts
View file

@ -3,359 +3,28 @@
* SPDX-License-Identifier: AGPL-3.0-only * SPDX-License-Identifier: AGPL-3.0-only
*/ */
import dns from 'node:dns/promises';
import { fileURLToPath } from 'node:url';
import { Inject, Injectable } from '@nestjs/common'; import { Inject, Injectable } from '@nestjs/common';
import { JSDOM } from 'jsdom'; import megalodon, { MegalodonInterface } from 'megalodon';
import httpLinkHeader from 'http-link-header'; import { v4 as uuid } from 'uuid';
import ipaddr from 'ipaddr.js'; /* import { kinds } from '@/misc/api-permissions.js';
import oauth2orize, { type OAuth2, AuthorizationError, ValidateFunctionArity2, OAuth2Req, MiddlewareRequest } from 'oauth2orize';
import oauth2Pkce from 'oauth2orize-pkce';
import fastifyView from '@fastify/view';
import pug from 'pug';
import bodyParser from 'body-parser';
import fastifyExpress from '@fastify/express';
import { verifyChallenge } from 'pkce-challenge';
import { mf2 } from 'microformats-parser';
import { secureRndstr } from '@/misc/secure-rndstr.js';
import { HttpRequestService } from '@/core/HttpRequestService.js';
import { kinds } from '@/misc/api-permissions.js';
import type { Config } from '@/config.js'; import type { Config } from '@/config.js';
import { DI } from '@/di-symbols.js'; import { DI } from '@/di-symbols.js'; */
import { bindThis } from '@/decorators.js'; import { bindThis } from '@/decorators.js';
import type { AccessTokensRepository, UsersRepository } from '@/models/_.js';
import { IdService } from '@/core/IdService.js';
import { CacheService } from '@/core/CacheService.js';
import type { MiLocalUser } from '@/models/User.js';
import { MemoryKVCache } from '@/misc/cache.js';
import { LoggerService } from '@/core/LoggerService.js';
import Logger from '@/logger.js';
import { StatusError } from '@/misc/status-error.js';
import type { ServerResponse } from 'node:http';
import type { FastifyInstance } from 'fastify'; import type { FastifyInstance } from 'fastify';
const base64regex = /^([0-9a-zA-Z+/]{4})*(([0-9a-zA-Z+/]{2}==)|([0-9a-zA-Z+/]{3}=))?$/;
// TODO: Consider migrating to @node-oauth/oauth2-server once
// https://github.com/node-oauth/node-oauth2-server/issues/180 is figured out.
// Upstream the various validations and RFC9207 implementation in that case.
// Follows https://indieauth.spec.indieweb.org/#client-identifier
// This is also mostly similar to https://developers.google.com/identity/protocols/oauth2/web-server#uri-validation
// although Google has stricter rule.
function validateClientId(raw: string): URL {
// "Clients are identified by a [URL]."
const url = ((): URL => {
try {
if (base64regex.test(raw)) return new URL(atob(raw));
return new URL(raw);
} catch { throw new AuthorizationError('client_id must be a valid URL', 'invalid_request'); }
})();
// "Client identifier URLs MUST have either an https or http scheme"
// But then again:
// https://datatracker.ietf.org/doc/html/rfc6749.html#section-3.1.2.1
// 'The redirection endpoint SHOULD require the use of TLS as described
// in Section 1.6 when the requested response type is "code" or "token"'
const allowedProtocols = process.env.NODE_ENV === 'test' ? ['http:', 'https:'] : ['https:'];
if (!allowedProtocols.includes(url.protocol)) {
throw new AuthorizationError('client_id must be a valid HTTPS URL', 'invalid_request');
}
// "MUST contain a path component (new URL() implicitly adds one)"
// "MUST NOT contain single-dot or double-dot path segments,"
const segments = url.pathname.split('/');
if (segments.includes('.') || segments.includes('..')) {
throw new AuthorizationError('client_id must not contain dot path segments', 'invalid_request');
}
// ("MAY contain a query string component")
// "MUST NOT contain a fragment component"
if (url.hash) {
throw new AuthorizationError('client_id must not contain a fragment component', 'invalid_request');
}
// "MUST NOT contain a username or password component"
if (url.username || url.password) {
throw new AuthorizationError('client_id must not contain a username or a password', 'invalid_request');
}
// ("MAY contain a port")
// "host names MUST be domain names or a loopback interface and MUST NOT be
// IPv4 or IPv6 addresses except for IPv4 127.0.0.1 or IPv6 [::1]."
if (!url.hostname.match(/\.\w+$/) && !['localhost', '127.0.0.1', '[::1]'].includes(url.hostname)) {
throw new AuthorizationError('client_id must have a domain name as a host name', 'invalid_request');
}
return url;
}
interface ClientInformation {
id: string;
redirectUris: string[];
name: string;
}
// https://indieauth.spec.indieweb.org/#client-information-discovery
// "Authorization servers SHOULD support parsing the [h-app] Microformat from the client_id,
// and if there is an [h-app] with a url property matching the client_id URL,
// then it should use the name and icon and display them on the authorization prompt."
// (But we don't display any icon for now)
// https://indieauth.spec.indieweb.org/#redirect-url
// "The client SHOULD publish one or more <link> tags or Link HTTP headers with a rel attribute
// of redirect_uri at the client_id URL.
// Authorization endpoints verifying that a redirect_uri is allowed for use by a client MUST
// look for an exact match of the given redirect_uri in the request against the list of
// redirect_uris discovered after resolving any relative URLs."
async function discoverClientInformation(logger: Logger, httpRequestService: HttpRequestService, id: string): Promise<ClientInformation> {
try {
const res = await httpRequestService.send(id);
const redirectUris: string[] = [];
const linkHeader = res.headers.get('link');
if (linkHeader) {
redirectUris.push(...httpLinkHeader.parse(linkHeader).get('rel', 'redirect_uri').map(r => r.uri));
}
const text = await res.text();
const fragment = JSDOM.fragment(text);
redirectUris.push(...[...fragment.querySelectorAll<HTMLLinkElement>('link[rel=redirect_uri][href]')].map(el => el.href));
let name = id;
if (text) {
const microformats = mf2(text, { baseUrl: res.url });
const nameProperty = microformats.items.find(item => item.type?.includes('h-app') && item.properties.url.includes(id))?.properties.name[0];
if (typeof nameProperty === 'string') {
name = nameProperty;
}
}
return {
id,
redirectUris: redirectUris.map(uri => new URL(uri, res.url).toString()),
name: typeof name === 'string' ? name : id,
};
} catch (err) {
console.error(err);
logger.error('Error while fetching client information', { err });
if (err instanceof StatusError) {
throw new AuthorizationError('Failed to fetch client information', 'invalid_request');
} else {
throw new AuthorizationError('Failed to parse client information', 'server_error');
}
}
}
type OmitFirstElement<T extends unknown[]> = T extends [unknown, ...(infer R)]
? R
: [];
interface OAuthParsedRequest extends OAuth2Req {
codeChallenge: string;
codeChallengeMethod: string;
}
interface OAuthHttpResponse extends ServerResponse {
redirect(location: string): void;
}
interface OAuth2DecisionRequest extends MiddlewareRequest {
body: {
transaction_id: string;
cancel: boolean;
login_token: string;
}
}
function getQueryMode(issuerUrl: string): oauth2orize.grant.Options['modes'] {
return {
query: (txn, res, params): void => {
// https://datatracker.ietf.org/doc/html/rfc9207#name-response-parameter-iss
// "In authorization responses to the client, including error responses,
// an authorization server supporting this specification MUST indicate its
// identity by including the iss parameter in the response."
params.iss = issuerUrl;
const parsed = new URL(txn.redirectURI);
for (const [key, value] of Object.entries(params)) {
parsed.searchParams.append(key, value as string);
}
return (res as OAuthHttpResponse).redirect(parsed.toString());
},
};
}
/**
* Maps the transaction ID and the oauth/authorize parameters.
*
* Flow:
* 1. oauth/authorize endpoint will call store() to store the parameters
* and puts the generated transaction ID to the dialog page
* 2. oauth/decision will call load() to retrieve the parameters and then remove()
*/
class OAuth2Store {
#cache = new MemoryKVCache<OAuth2>(1000 * 60 * 5); // expires after 5min
load(req: OAuth2DecisionRequest, cb: (err: Error | null, txn?: OAuth2) => void): void {
const { transaction_id } = req.body;
if (!transaction_id) {
cb(new AuthorizationError('Missing transaction ID', 'invalid_request'));
return;
}
const loaded = this.#cache.get(transaction_id);
if (!loaded) {
cb(new AuthorizationError('Invalid or expired transaction ID', 'access_denied'));
return;
}
cb(null, loaded);
}
store(req: OAuth2DecisionRequest, oauth2: OAuth2, cb: (err: Error | null, transactionID?: string) => void): void {
const transactionId = secureRndstr(128);
this.#cache.set(transactionId, oauth2);
cb(null, transactionId);
}
remove(req: OAuth2DecisionRequest, tid: string, cb: () => void): void {
this.#cache.delete(tid);
cb();
}
}
@Injectable() @Injectable()
export class OAuth2ProviderService { export class OAuth2ProviderService {
#server = oauth2orize.createServer({
store: new OAuth2Store(),
});
#logger: Logger;
constructor( constructor(
@Inject(DI.config) /* @Inject(DI.config)
private config: Config, private config: Config, */
private httpRequestService: HttpRequestService, ) { }
@Inject(DI.accessTokensRepository)
accessTokensRepository: AccessTokensRepository,
idService: IdService,
@Inject(DI.usersRepository)
private usersRepository: UsersRepository,
private cacheService: CacheService,
loggerService: LoggerService,
) {
this.#logger = loggerService.getLogger('oauth');
const grantCodeCache = new MemoryKVCache<{
clientId: string,
userId: string,
redirectUri: string,
codeChallenge: string,
scopes: string[],
// fields to prevent multiple code use
grantedToken?: string,
revoked?: boolean,
used?: boolean,
}>(1000 * 60 * 5); // expires after 5m
// https://datatracker.ietf.org/doc/html/draft-ietf-oauth-security-topics
// "Authorization servers MUST support PKCE [RFC7636]."
this.#server.grant(oauth2Pkce.extensions());
this.#server.grant(oauth2orize.grant.code({
modes: getQueryMode(config.url),
}, (client, redirectUri, token, ares, areq, locals, done) => {
(async (): Promise<OmitFirstElement<Parameters<typeof done>>> => {
this.#logger.info(`Checking the user before sending authorization code to ${client.id}`);
if (!token) {
throw new AuthorizationError('No user', 'invalid_request');
}
const user = await this.cacheService.localUserByNativeTokenCache.fetch(token,
() => this.usersRepository.findOneBy({ token }) as Promise<MiLocalUser | null>);
if (!user) {
throw new AuthorizationError('No such user', 'invalid_request');
}
this.#logger.info(`Sending authorization code on behalf of user ${user.id} to ${client.id} through ${redirectUri}, with scope: [${areq.scope}]`);
const code = secureRndstr(128);
grantCodeCache.set(code, {
clientId: client.id,
userId: user.id,
redirectUri,
codeChallenge: (areq as OAuthParsedRequest).codeChallenge,
scopes: areq.scope,
});
return [code];
})().then(args => done(null, ...args), err => done(err));
}));
this.#server.exchange(oauth2orize.exchange.authorizationCode((client, code, redirectUri, body, authInfo, done) => {
(async (): Promise<OmitFirstElement<Parameters<typeof done>> | undefined> => {
this.#logger.info('Checking the received authorization code for the exchange');
const granted = grantCodeCache.get(code);
if (!granted) {
return;
}
// https://datatracker.ietf.org/doc/html/rfc6749.html#section-4.1.2
// "If an authorization code is used more than once, the authorization server
// MUST deny the request and SHOULD revoke (when possible) all tokens
// previously issued based on that authorization code."
if (granted.used) {
this.#logger.info(`Detected multiple code use from ${granted.clientId} for user ${granted.userId}. Revoking the code.`);
grantCodeCache.delete(code);
granted.revoked = true;
if (granted.grantedToken) {
await accessTokensRepository.delete({ token: granted.grantedToken });
}
return;
}
granted.used = true;
// https://datatracker.ietf.org/doc/html/rfc6749.html#section-4.1.3
if (body.client_id !== granted.clientId) return;
if (redirectUri !== granted.redirectUri) return;
// https://datatracker.ietf.org/doc/html/rfc7636.html#section-4.6
if (!body.code_verifier) return;
if (!(await verifyChallenge(body.code_verifier as string, granted.codeChallenge))) return;
const accessToken = secureRndstr(128);
const now = new Date();
// NOTE: we don't have a setup for automatic token expiration
await accessTokensRepository.insert({
id: idService.genId(),
createdAt: now,
lastUsedAt: now,
userId: granted.userId,
token: accessToken,
hash: accessToken,
name: granted.clientId,
permission: granted.scopes,
});
if (granted.revoked) {
this.#logger.info('Canceling the token as the authorization code was revoked in parallel during the process.');
await accessTokensRepository.delete({ token: accessToken });
return;
}
granted.grantedToken = accessToken;
this.#logger.info(`Generated access token for ${granted.clientId} for user ${granted.userId}, with scope: [${granted.scopes}]`);
return [accessToken, undefined, { scope: granted.scopes.join(' ') }];
})().then(args => done(null, ...args ?? []), err => done(err));
}));
}
@bindThis @bindThis
public async createServer(fastify: FastifyInstance): Promise<void> { public async createServer(fastify: FastifyInstance): Promise<void> {
// https://datatracker.ietf.org/doc/html/rfc8414.html // https://datatracker.ietf.org/doc/html/rfc8414.html
// https://indieauth.spec.indieweb.org/#indieauth-server-metadata // https://indieauth.spec.indieweb.org/#indieauth-server-metadata
fastify.get('/.well-known/oauth-authorization-server', async (_request, reply) => { /* fastify.get('/.well-known/oauth-authorization-server', async (_request, reply) => {
reply.send({ reply.send({
issuer: this.config.url, issuer: this.config.url,
authorization_endpoint: new URL('/oauth/authorize', this.config.url), authorization_endpoint: new URL('/oauth/authorize', this.config.url),
@ -367,123 +36,68 @@ export class OAuth2ProviderService {
code_challenge_methods_supported: ['S256'], code_challenge_methods_supported: ['S256'],
authorization_response_iss_parameter_supported: true, authorization_response_iss_parameter_supported: true,
}); });
}); }); */
fastify.get('/oauth/authorize', async (request, reply) => { fastify.get('/oauth/authorize', async (request, reply) => {
const oauth2 = (request.raw as MiddlewareRequest).oauth2; const query: any = request.query;
if (!oauth2) { let param = "mastodon=true";
throw new Error('Unexpected lack of authorization information'); if (query.state) param += `&state=${query.state}`;
if (query.redirect_uri) param += `&redirect_uri=${query.redirect_uri}`;
const client = query.client_id ? query.client_id : "";
reply.redirect(
`${atob(client)}?${param}`,
);
});
fastify.post('/oauth/token', async (request, reply) => {
const body: any = request.body || request.query;
if (body.grant_type === "client_credentials") {
const ret = {
access_token: uuid(),
token_type: "Bearer",
scope: "read",
created_at: Math.floor(new Date().getTime() / 1000),
};
reply.send(ret);
}
let client_id: any = body.client_id;
const BASE_URL = `${request.protocol}://${request.hostname}`;
const generator = (megalodon as any).default;
const client = generator(BASE_URL, null) as MegalodonInterface;
let m = null;
let token = null;
if (body.code) {
//m = body.code.match(/^([a-zA-Z0-9]{8})([a-zA-Z0-9]{4})([a-zA-Z0-9]{4})([a-zA-Z0-9]{4})([a-zA-Z0-9]{12})/);
//if (!m.length) {
// ctx.body = { error: "Invalid code" };
// return;
//}
//token = `${m[1]}-${m[2]}-${m[3]}-${m[4]}-${m[5]}`
//console.log(body.code, token);
token = body.code;
}
if (client_id instanceof Array) {
client_id = client_id.toString();
} else if (!client_id) {
client_id = null;
}
try {
const atData = await client.fetchAccessToken(
client_id,
body.client_secret,
token ? token : "",
);
const ret = {
access_token: atData.accessToken,
token_type: "Bearer",
scope: body.scope || "read write follow push",
created_at: Math.floor(new Date().getTime() / 1000),
};
reply.send(ret);
} catch (err: any) {
/* console.error(err); */
reply.code(401).send(err.response);
} }
this.#logger.info(`Rendering authorization page for "${oauth2.client.name}"`);
reply.header('Cache-Control', 'no-store');
return await reply.view('oauth', {
transactionId: oauth2.transactionID,
clientName: oauth2.client.name,
scope: oauth2.req.scope.join(' '),
});
});
fastify.post('/oauth/decision', async () => { });
fastify.post('/oauth/token', async () => { });
fastify.register(fastifyView, {
root: fileURLToPath(new URL('../web/views', import.meta.url)),
engine: { pug },
defaultContext: {
version: this.config.version,
config: this.config,
},
});
await fastify.register(fastifyExpress);
fastify.use('/oauth/authorize', this.#server.authorize(((areq, done) => {
(async (): Promise<Parameters<typeof done>> => {
// This should return client/redirectURI AND the error, or
// the handler can't send error to the redirection URI
const { codeChallenge, codeChallengeMethod, clientID, redirectURI, scope } = areq as OAuthParsedRequest;
this.#logger.info(`Validating authorization parameters, with client_id: ${clientID}, redirect_uri: ${redirectURI}, scope: ${scope}`);
const clientUrl = validateClientId(clientID);
// https://indieauth.spec.indieweb.org/#client-information-discovery
// "the server may want to resolve the domain name first and avoid fetching the document
// if the IP address is within the loopback range defined by [RFC5735]
// or any other implementation-specific internal IP address."
if (process.env.NODE_ENV !== 'test' || process.env.MISSKEY_TEST_CHECK_IP_RANGE === '1') {
const lookup = await dns.lookup(clientUrl.hostname);
if (ipaddr.parse(lookup.address).range() !== 'unicast') {
throw new AuthorizationError('client_id resolves to disallowed IP range.', 'invalid_request');
}
}
// Find client information from the remote.
const clientInfo = await discoverClientInformation(this.#logger, this.httpRequestService, clientUrl.href);
// Require the redirect URI to be included in an explicit list, per
// https://datatracker.ietf.org/doc/html/draft-ietf-oauth-security-topics#section-4.1.3
/* if (!clientInfo.redirectUris.includes(redirectURI)) {
throw new AuthorizationError('Invalid redirect_uri', 'invalid_request');
} */
try {
const scopes = [...new Set(scope)].filter(s => kinds.includes(s));
if (!scopes.length) {
throw new AuthorizationError('`scope` parameter has no known scope', 'invalid_scope');
}
areq.scope = scopes;
// Require PKCE parameters.
// Recommended by https://indieauth.spec.indieweb.org/#authorization-request, but also prevents downgrade attack:
// https://datatracker.ietf.org/doc/html/draft-ietf-oauth-security-topics#name-pkce-downgrade-attack
if (typeof codeChallenge !== 'string') {
throw new AuthorizationError('`code_challenge` parameter is required', 'invalid_request');
}
if (codeChallengeMethod !== 'S256') {
throw new AuthorizationError('`code_challenge_method` parameter must be set as S256', 'invalid_request');
}
} catch (err) {
return [err as Error, clientInfo, redirectURI];
}
return [null, clientInfo, redirectURI];
})().then(args => done(...args), err => done(err));
}) as ValidateFunctionArity2));
fastify.use('/oauth/authorize', this.#server.errorHandler({
mode: 'indirect',
modes: getQueryMode(this.config.url),
}));
fastify.use('/oauth/authorize', this.#server.errorHandler());
fastify.use('/oauth/decision', bodyParser.urlencoded({ extended: false }));
fastify.use('/oauth/decision', this.#server.decision((req, done) => {
const { body } = req as OAuth2DecisionRequest;
this.#logger.info(`Received the decision. Cancel: ${!!body.cancel}`);
req.user = body.login_token;
done(null, undefined);
}));
fastify.use('/oauth/decision', this.#server.errorHandler());
// Clients may use JSON or urlencoded
fastify.use('/oauth/token', bodyParser.urlencoded({ extended: false }));
fastify.use('/oauth/token', bodyParser.json({ strict: true }));
fastify.use('/oauth/token', this.#server.token());
fastify.use('/oauth/token', this.#server.errorHandler());
// Return 404 for any unknown paths under /oauth so that clients can know
// whether a certain endpoint is supported or not.
fastify.all('/oauth/*', async (_request, reply) => {
reply.code(404);
reply.send({
error: {
message: 'Unknown OAuth endpoint.',
code: 'UNKNOWN_OAUTH_ENDPOINT',
id: 'aa49e620-26cb-4e28-aad6-8cbcb58db147',
kind: 'client',
},
});
}); });
} }
} }

12
pnpm-lock.yaml generated
View file

@ -389,6 +389,9 @@ importers:
ulid: ulid:
specifier: 2.3.0 specifier: 2.3.0
version: 2.3.0 version: 2.3.0
uuid:
specifier: ^9.0.1
version: 9.0.1
vary: vary:
specifier: 1.1.2 specifier: 1.1.2
version: 1.1.2 version: 1.1.2
@ -607,6 +610,9 @@ importers:
'@types/tmp': '@types/tmp':
specifier: 0.2.4 specifier: 0.2.4
version: 0.2.4 version: 0.2.4
'@types/uuid':
specifier: ^9.0.4
version: 9.0.4
'@types/vary': '@types/vary':
specifier: 1.1.0 specifier: 1.1.0
version: 1.1.0 version: 1.1.0
@ -19184,7 +19190,7 @@ packages:
reflect-metadata: 0.1.13 reflect-metadata: 0.1.13
sha.js: 2.4.11 sha.js: 2.4.11
tslib: 2.5.3 tslib: 2.5.3
uuid: 9.0.0 uuid: 9.0.1
yargs: 17.6.2 yargs: 17.6.2
transitivePeerDependencies: transitivePeerDependencies:
- supports-color - supports-color
@ -19453,10 +19459,6 @@ packages:
resolution: {integrity: sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==} resolution: {integrity: sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==}
hasBin: true hasBin: true
/uuid@9.0.0:
resolution: {integrity: sha512-MXcSTerfPa4uqyzStbRoTgt5XIe3x5+42+q1sDuy3R5MDk66URdLMOZe5aPX/SQd+kuYAh0FdP/pO28IkQyTeg==}
dev: false
/uuid@9.0.1: /uuid@9.0.1:
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hasBin: true hasBin: true