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Collect terms consent from the user during SSO registration (#9276)

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Richard van der Hoff 2021-02-01 18:37:41 +00:00 committed by GitHub
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1
changelog.d/9276.feature Normal file
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@ -0,0 +1 @@
Improve the user experience of setting up an account via single-sign on.

22
docs/sample_config.yaml
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@ -2003,6 +2003,28 @@ sso:
#
# * username: the localpart of the user's chosen user id
#
# * HTML page allowing the user to consent to the server's terms and
# conditions. This is only shown for new users, and only if
# `user_consent.require_at_registration` is set.
#
# When rendering, this template is given the following variables:
#
# * server_name: the homeserver's name.
#
# * user_id: the user's matrix proposed ID.
#
# * user_profile.display_name: the user's proposed display name, if any.
#
# * consent_version: the version of the terms that the user will be
# shown
#
# * terms_url: a link to the page showing the terms.
#
# The template should render a form which submits the following fields:
#
# * accepted_version: the version of the terms accepted by the user
# (ie, 'consent_version' from the input variables).
#
# * HTML page for a confirmation step before redirecting back to the client
# with the login token: 'sso_redirect_confirm.html'.
#

1
docs/workers.md
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@ -259,6 +259,7 @@ using):
^/_matrix/client/(api/v1|r0|unstable)/login/sso/redirect
^/_synapse/client/pick_idp$
^/_synapse/client/pick_username
^/_synapse/client/new_user_consent$
^/_synapse/client/sso_register$
# OpenID Connect requests.

22
synapse/config/sso.py
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@ -158,6 +158,28 @@ class SSOConfig(Config):
#
# * username: the localpart of the user's chosen user id
#
# * HTML page allowing the user to consent to the server's terms and
# conditions. This is only shown for new users, and only if
# `user_consent.require_at_registration` is set.
#
# When rendering, this template is given the following variables:
#
# * server_name: the homeserver's name.
#
# * user_id: the user's matrix proposed ID.
#
# * user_profile.display_name: the user's proposed display name, if any.
#
# * consent_version: the version of the terms that the user will be
# shown
#
# * terms_url: a link to the page showing the terms.
#
# The template should render a form which submits the following fields:
#
# * accepted_version: the version of the terms accepted by the user
# (ie, 'consent_version' from the input variables).
#
# * HTML page for a confirmation step before redirecting back to the client
# with the login token: 'sso_redirect_confirm.html'.
#

2
synapse/handlers/register.py
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@ -694,6 +694,8 @@ class RegistrationHandler(BaseHandler):
access_token: The access token of the newly logged in device, or
None if `inhibit_login` enabled.
"""
# TODO: 3pid registration can actually happen on the workers. Consider
# refactoring it.
if self.hs.config.worker_app:
await self._post_registration_client(
user_id=user_id, auth_result=auth_result, access_token=access_token

44
synapse/handlers/sso.py
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@ -155,6 +155,7 @@ class UsernameMappingSession:
chosen_localpart = attr.ib(type=Optional[str], default=None)
use_display_name = attr.ib(type=bool, default=True)
emails_to_use = attr.ib(type=Collection[str], default=())
terms_accepted_version = attr.ib(type=Optional[str], default=None)
# the HTTP cookie used to track the mapping session id
@ -190,6 +191,8 @@ class SsoHandler:
# map from idp_id to SsoIdentityProvider
self._identity_providers = {} # type: Dict[str, SsoIdentityProvider]
self._consent_at_registration = hs.config.consent.user_consent_at_registration
def register_identity_provider(self, p: SsoIdentityProvider):
p_id = p.idp_id
assert p_id not in self._identity_providers
@ -761,6 +764,38 @@ class SsoHandler:
)
session.emails_to_use = filtered_emails
# we may now need to collect consent from the user, in which case, redirect
# to the consent-extraction-unit
if self._consent_at_registration:
redirect_url = b"/_synapse/client/new_user_consent"
# otherwise, redirect to the completion page
else:
redirect_url = b"/_synapse/client/sso_register"
respond_with_redirect(request, redirect_url)
async def handle_terms_accepted(
self, request: Request, session_id: str, terms_version: str
):
"""Handle a request to the new-user 'consent' endpoint
Will serve an HTTP response to the request.
Args:
request: HTTP request
session_id: ID of the username mapping session, extracted from a cookie
terms_version: the version of the terms which the user viewed and consented
to
"""
logger.info(
"[session %s] User consented to terms version %s",
session_id,
terms_version,
)
session = self.get_mapping_session(session_id)
session.terms_accepted_version = terms_version
# we're done; now we can register the user
respond_with_redirect(request, b"/_synapse/client/sso_register")
@ -816,6 +851,15 @@ class SsoHandler:
path=b"/",
)
auth_result = {}
if session.terms_accepted_version:
# TODO: make this less awful.
auth_result[LoginType.TERMS] = True
await self._registration_handler.post_registration_actions(
user_id, auth_result, access_token=None
)
await self._auth_handler.complete_sso_login(
user_id,
request,

39
synapse/res/templates/sso_new_user_consent.html Normal file
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@ -0,0 +1,39 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>SSO redirect confirmation</title>
<meta name="viewport" content="width=device-width, user-scalable=no">
<style type="text/css">
{% include "sso.css" without context %}
#consent_form {
margin-top: 56px;
}
</style>
</head>
<body>
<header>
<h1>Your account is nearly ready</h1>
<p>Agree to the terms to create your account.</p>
</header>
<main>
<!-- {% if user_profile.avatar_url and user_profile.display_name %} -->
<div class="profile">
<img src="{{ user_profile.avatar_url | mxc_to_http(64, 64) }}" class="avatar" />
<div class="profile-details">
<div class="display-name">{{ user_profile.display_name }}</div>
<div class="user-id">{{ user_id }}</div>
</div>
</div>
<!-- {% endif %} -->
<form method="post" action="{{my_url}}" id="consent_form">
<p>
<input id="accepted_version" type="checkbox" name="accepted_version" value="{{ consent_version }}" required>
<label for="accepted_version">I have read and agree to the <a href="{{ terms_url }}" target="_blank">terms and conditions</a>.</label>
</p>
<input type="submit" class="primary-button" value="Continue"/>
</form>
</main>
</body>
</html>

2
synapse/rest/synapse/client/__init__.py
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@ -17,6 +17,7 @@ from typing import TYPE_CHECKING, Mapping
from twisted.web.resource import Resource
from synapse.rest.synapse.client.new_user_consent import NewUserConsentResource
from synapse.rest.synapse.client.pick_idp import PickIdpResource
from synapse.rest.synapse.client.pick_username import pick_username_resource
from synapse.rest.synapse.client.sso_register import SsoRegisterResource
@ -39,6 +40,7 @@ def build_synapse_client_resource_tree(hs: "HomeServer") -> Mapping[str, Resourc
# enabled (they just won't work very well if it's not)
"/_synapse/client/pick_idp": PickIdpResource(hs),
"/_synapse/client/pick_username": pick_username_resource(hs),
"/_synapse/client/new_user_consent": NewUserConsentResource(hs),
"/_synapse/client/sso_register": SsoRegisterResource(hs),
}

97
synapse/rest/synapse/client/new_user_consent.py Normal file
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@ -0,0 +1,97 @@
# -*- coding: utf-8 -*-
# Copyright 2021 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
from typing import TYPE_CHECKING
from twisted.web.http import Request
from synapse.api.errors import SynapseError
from synapse.handlers.sso import get_username_mapping_session_cookie_from_request
from synapse.http.server import DirectServeHtmlResource, respond_with_html
from synapse.http.servlet import parse_string
from synapse.types import UserID
from synapse.util.templates import build_jinja_env
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class NewUserConsentResource(DirectServeHtmlResource):
"""A resource which collects consent to the server's terms from a new user
This resource gets mounted at /_synapse/client/new_user_consent, and is shown
when we are automatically creating a new user due to an SSO login.
It shows a template which prompts the user to go and read the Ts and Cs, and click
a clickybox if they have done so.
"""
def __init__(self, hs: "HomeServer"):
super().__init__()
self._sso_handler = hs.get_sso_handler()
self._server_name = hs.hostname
self._consent_version = hs.config.consent.user_consent_version
def template_search_dirs():
if hs.config.sso.sso_template_dir:
yield hs.config.sso.sso_template_dir
yield hs.config.sso.default_template_dir
self._jinja_env = build_jinja_env(template_search_dirs(), hs.config)
async def _async_render_GET(self, request: Request) -> None:
try:
session_id = get_username_mapping_session_cookie_from_request(request)
session = self._sso_handler.get_mapping_session(session_id)
except SynapseError as e:
logger.warning("Error fetching session: %s", e)
self._sso_handler.render_error(request, "bad_session", e.msg, code=e.code)
return
user_id = UserID(session.chosen_localpart, self._server_name)
user_profile = {
"display_name": session.display_name,
}
template_params = {
"user_id": user_id.to_string(),
"user_profile": user_profile,
"consent_version": self._consent_version,
"terms_url": "/_matrix/consent?v=%s" % (self._consent_version,),
}
template = self._jinja_env.get_template("sso_new_user_consent.html")
html = template.render(template_params)
respond_with_html(request, 200, html)
async def _async_render_POST(self, request: Request):
try:
session_id = get_username_mapping_session_cookie_from_request(request)
except SynapseError as e:
logger.warning("Error fetching session cookie: %s", e)
self._sso_handler.render_error(request, "bad_session", e.msg, code=e.code)
return
try:
accepted_version = parse_string(request, "accepted_version", required=True)
except SynapseError as e:
self._sso_handler.render_error(request, "bad_param", e.msg, code=e.code)
return
await self._sso_handler.handle_terms_accepted(
request, session_id, accepted_version
)