from collections import namedtuple import requests import pymacaroons from flask import Flask, render_template, send_from_directory, request, \ url_for, abort, g, redirect, jsonify, session, flash from flask_login import logout_user, login_user, UserMixin from fatcat_web import login_manager, app, api, priv_api, Config import fatcat_client def handle_logout(): logout_user() for k in ('editor', 'api_token'): if k in session: session.pop(k) session.clear() def handle_token_login(token): try: m = pymacaroons.Macaroon.deserialize(token) except pymacaroons.exceptions.MacaroonDeserializationException: # TODO: what kind of Exceptions? app.log.warn("auth fail: MacaroonDeserializationException") return abort(400) # extract editor_id editor_id = None for caveat in m.first_party_caveats(): caveat = caveat.caveat_id if caveat.startswith(b"editor_id = "): editor_id = caveat[12:].decode('utf-8') if not editor_id: app.log.warn("auth fail: editor_id missing in macaroon") abort(400) # fetch editor info editor = api.get_editor(editor_id) session.permanent = True session['api_token'] = token session['editor'] = editor.to_dict() login_user(load_user(editor.editor_id)) return redirect("/auth/account") # This will need to login/signup via fatcatd API, then set token in session def handle_oauth(remote, token, user_info): if user_info: # fetch api login/signup using user_info # ISS is basically the API url (though more formal in OIDC) # SUB is the stable internal identifier for the user (not usually the username itself) # TODO: should have the real sub here # TODO: would be nicer to pass preferred_username for account creation iss = remote.OAUTH_CONFIG['api_base_url'] # we reuse 'preferred_username' for account name auto-creation (but # don't store it otherwise in the backend, at least currently). But i'm # not sure all loginpass backends will set it if user_info.get('preferred_username'): preferred_username = user_info['preferred_username'] else: preferred_username = user_info['sub'] params = fatcat_client.AuthOidc(remote.name, user_info['sub'], iss, user_info['preferred_username']) # this call requires admin privs (resp, http_status, http_headers) = priv_api.auth_oidc_with_http_info(params) editor = resp.editor api_token = resp.token if http_status == 201: flash("Welcome to Fatcat! An account has been created for you with a temporary username; you may wish to change it under account settings") flash("You must use the same mechanism ({}) to login in the future".format(remote.name)) else: flash("Welcome back!") # write token and username to session session.permanent = True session['api_token'] = api_token session['editor'] = editor.to_dict() # call login_user(load_user(editor_id)) login_user(load_user(editor.editor_id)) return redirect("/auth/account") # XXX: what should this actually be? raise Exception("didn't receive OAuth user_info") def handle_ia_xauth(email, password): resp = requests.post(Config.IA_XAUTH_URI, params={'op': 'authenticate'}, json={ 'version': '1', 'email': email, 'password': password, 'access': Config.IA_XAUTH_CLIENT_ID, 'secret': Config.IA_XAUTH_CLIENT_SECRET, }) if resp.status_code == 401 or (not resp.json().get('success')): try: flash("Internet Archive email/password didn't match: {}".format(resp.json()['values']['reason'])) except: app.log.warn("IA XAuth fail: {}".format(resp.content)) return render_template('auth_ia_login.html', email=email), resp.status_code elif resp.status_code != 200: flash("Internet Archive login failed (internal error?)") app.log.warn("IA XAuth fail: {}".format(resp.content)) return render_template('auth_ia_login.html', email=email), resp.status_code # Successful login; now fetch info... resp = requests.post(Config.IA_XAUTH_URI, params={'op': 'info'}, json={ 'version': '1', 'email': email, 'access': Config.IA_XAUTH_CLIENT_ID, 'secret': Config.IA_XAUTH_CLIENT_SECRET, }) if resp.status_code != 200: flash("Internet Archive login failed (internal error?)") app.log.warn("IA XAuth fail: {}".format(resp.content)) return render_template('auth_ia_login.html', email=email), resp.status_code ia_info = resp.json()['values'] # and pass off "as if" we did OAuth successfully FakeOAuthRemote = namedtuple('FakeOAuthRemote', ['name', 'OAUTH_CONFIG']) remote = FakeOAuthRemote(name='archive', OAUTH_CONFIG={'api_base_url': Config.IA_XAUTH_URI}) oauth_info = { 'preferred_username': ia_info['screenname'], 'iss': Config.IA_XAUTH_URI, 'sub': ia_info['itemname'], } return handle_oauth(remote, None, oauth_info) @login_manager.user_loader def load_user(editor_id): # looks for extra info in session, and updates the user object with that. # If session isn't loaded/valid, should return None if (not session.get('editor')) or (not session.get('api_token')): return None editor = session['editor'] token = session['api_token'] user = UserMixin() user.id = editor_id user.editor_id = editor_id user.username = editor['username'] user.is_admin = editor['is_admin'] user.token = token return user