import express from 'express' import OAuth2Server, { InvalidClientError, InvalidGrantError, InvalidRequestError, Request, Response, UnauthorizedClientError, UnsupportedGrantTypeError } from '@node-oauth/oauth2-server' import { randomBytesPromise } from '@server/helpers/core-utils' import { MOAuthClient } from '@server/types/models' import { sha1 } from '@shared/extra-utils' import { HttpStatusCode } from '@shared/models' import { OAUTH_LIFETIME, OTP } from '../../initializers/constants' import { BypassLogin, getClient, getRefreshToken, getUser, revokeToken, saveToken } from './oauth-model' import { isOTPValid } from '@server/helpers/otp' class MissingTwoFactorError extends Error { code = HttpStatusCode.UNAUTHORIZED_401 name = 'missing_two_factor' } class InvalidTwoFactorError extends Error { code = HttpStatusCode.BAD_REQUEST_400 name = 'invalid_two_factor' } /** * * Reimplement some functions of OAuth2Server to inject external auth methods * */ const oAuthServer = new OAuth2Server({ accessTokenLifetime: OAUTH_LIFETIME.ACCESS_TOKEN, refreshTokenLifetime: OAUTH_LIFETIME.REFRESH_TOKEN, // See https://github.com/oauthjs/node-oauth2-server/wiki/Model-specification for the model specifications model: require('./oauth-model') }) // --------------------------------------------------------------------------- async function handleOAuthToken (req: express.Request, options: { refreshTokenAuthName?: string, bypassLogin?: BypassLogin }) { const request = new Request(req) const { refreshTokenAuthName, bypassLogin } = options if (request.method !== 'POST') { throw new InvalidRequestError('Invalid request: method must be POST') } if (!request.is([ 'application/x-www-form-urlencoded' ])) { throw new InvalidRequestError('Invalid request: content must be application/x-www-form-urlencoded') } const clientId = request.body.client_id const clientSecret = request.body.client_secret if (!clientId || !clientSecret) { throw new InvalidClientError('Invalid client: cannot retrieve client credentials') } const client = await getClient(clientId, clientSecret) if (!client) { throw new InvalidClientError('Invalid client: client is invalid') } const grantType = request.body.grant_type if (!grantType) { throw new InvalidRequestError('Missing parameter: `grant_type`') } if (![ 'password', 'refresh_token' ].includes(grantType)) { throw new UnsupportedGrantTypeError('Unsupported grant type: `grant_type` is invalid') } if (!client.grants.includes(grantType)) { throw new UnauthorizedClientError('Unauthorized client: `grant_type` is invalid') } if (grantType === 'password') { return handlePasswordGrant({ request, client, bypassLogin }) } return handleRefreshGrant({ request, client, refreshTokenAuthName }) } function handleOAuthAuthenticate ( req: express.Request, res: express.Response, authenticateInQuery = false ) { const options = authenticateInQuery ? { allowBearerTokensInQueryString: true } : {} return oAuthServer.authenticate(new Request(req), new Response(res), options) } export { MissingTwoFactorError, InvalidTwoFactorError, handleOAuthToken, handleOAuthAuthenticate } // --------------------------------------------------------------------------- async function handlePasswordGrant (options: { request: Request client: MOAuthClient bypassLogin?: BypassLogin }) { const { request, client, bypassLogin } = options if (!request.body.username) { throw new InvalidRequestError('Missing parameter: `username`') } if (!bypassLogin && !request.body.password) { throw new InvalidRequestError('Missing parameter: `password`') } const user = await getUser(request.body.username, request.body.password, bypassLogin) if (!user) throw new InvalidGrantError('Invalid grant: user credentials are invalid') if (user.otpSecret) { if (!request.headers[OTP.HEADER_NAME]) { throw new MissingTwoFactorError('Missing two factor header') } if (isOTPValid({ secret: user.otpSecret, token: request.headers[OTP.HEADER_NAME] }) !== true) { throw new InvalidTwoFactorError('Invalid two factor header') } } const token = await buildToken() return saveToken(token, client, user, { bypassLogin }) } async function handleRefreshGrant (options: { request: Request client: MOAuthClient refreshTokenAuthName: string }) { const { request, client, refreshTokenAuthName } = options if (!request.body.refresh_token) { throw new InvalidRequestError('Missing parameter: `refresh_token`') } const refreshToken = await getRefreshToken(request.body.refresh_token) if (!refreshToken) { throw new InvalidGrantError('Invalid grant: refresh token is invalid') } if (refreshToken.client.id !== client.id) { throw new InvalidGrantError('Invalid grant: refresh token is invalid') } if (refreshToken.refreshTokenExpiresAt && refreshToken.refreshTokenExpiresAt < new Date()) { throw new InvalidGrantError('Invalid grant: refresh token has expired') } await revokeToken({ refreshToken: refreshToken.refreshToken }) const token = await buildToken() return saveToken(token, client, refreshToken.user, { refreshTokenAuthName }) } function generateRandomToken () { return randomBytesPromise(256) .then(buffer => sha1(buffer)) } function getTokenExpiresAt (type: 'access' | 'refresh') { const lifetime = type === 'access' ? OAUTH_LIFETIME.ACCESS_TOKEN : OAUTH_LIFETIME.REFRESH_TOKEN return new Date(Date.now() + lifetime * 1000) } async function buildToken () { const [ accessToken, refreshToken ] = await Promise.all([ generateRandomToken(), generateRandomToken() ]) return { accessToken, refreshToken, accessTokenExpiresAt: getTokenExpiresAt('access'), refreshTokenExpiresAt: getTokenExpiresAt('refresh') } }