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Completely replace fallback auth for C/S V2:
* Now only the auth part goes to fallback, not the whole operation * Auth fallback is a normal API endpoint, not a static page * Params like the recaptcha pubkey can just live in the config Involves a little engineering on JsonResource so its servlets aren't always forced to return JSON. I should document this more, in fact I'll do that now.
This commit is contained in:
David Baker
parent
f129ee1e18
commit
e9c908ebc0
6 changed files with 280 additions and 26 deletions
189
synapse/rest/client/v2_alpha/auth.py
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189
synapse/rest/client/v2_alpha/auth.py
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# -*- coding: utf-8 -*-
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# Copyright 2015 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer
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from synapse.api.constants import LoginType
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from synapse.api.errors import SynapseError
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from synapse.api.urls import CLIENT_V2_ALPHA_PREFIX
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from synapse.http.servlet import RestServlet
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from ._base import client_v2_pattern
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import logging
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logger = logging.getLogger(__name__)
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RECAPTCHA_TEMPLATE = """
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<html>
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<head>
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<title>Authentication</title>
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<meta name='viewport' content='width=device-width, initial-scale=1,
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user-scalable=no, minimum-scale=1.0, maximum-scale=1.0'>
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<script src="https://www.google.com/recaptcha/api.js"
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async defer></script>
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<script src="//code.jquery.com/jquery-1.11.2.min.js"></script>
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<link rel="stylesheet" href="/_matrix/static/client/register/style.css">
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<script>
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function captchaDone() {
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$('#registrationForm').submit();
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}
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</script>
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</head>
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<body>
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<form id="registrationForm" method="post" action="%(myurl)s">
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<div>
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<p>
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Hello! We need to prevent computer programs and other automated
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things from creating accounts on this server.
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</p>
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<p>
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Please verify that you're not a robot.
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</p>
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<input type="hidden" name="session" value="%(session)s" />
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<div class="g-recaptcha"
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data-sitekey="%(sitekey)s"
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data-callback="captchaDone">
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</div>
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<noscript>
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<input type="submit" value="All Done" />
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</noscript>
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</div>
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</div>
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</form>
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</body>
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</html>
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"""
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SUCCESS_TEMPLATE = """
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<html>
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<head>
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<title>Success!</title>
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<meta name='viewport' content='width=device-width, initial-scale=1,
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user-scalable=no, minimum-scale=1.0, maximum-scale=1.0'>
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<link rel="stylesheet" href="/_matrix/static/client/register/style.css">
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<script>
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if (window.onAuthDone != undefined) {
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window.onAuthDone();
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}
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</script>
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</head>
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<body>
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<div>
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<p>Thank you</p>
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<p>You may now close this window and return to the application</p>
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</div>
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</body>
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</html>
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"""
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class AuthRestServlet(RestServlet):
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"""
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Handles Client / Server API authentication in any situations where it
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cannot be handled in the normal flow (with requests to the same endpoint).
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Current use is for web fallback auth.
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"""
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PATTERN = client_v2_pattern("/auth/(?P<stagetype>[\w\.]*)/fallback/web")
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def __init__(self, hs):
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super(AuthRestServlet, self).__init__()
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self.hs = hs
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self.auth = hs.get_auth()
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self.auth_handler = hs.get_handlers().auth_handler
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self.registration_handler = hs.get_handlers().registration_handler
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@defer.inlineCallbacks
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def on_GET(self, request, stagetype):
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yield
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if stagetype == LoginType.RECAPTCHA:
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if ('session' not in request.args or
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len(request.args['session']) == 0):
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raise SynapseError(400, "No session supplied")
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session = request.args["session"][0]
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html = RECAPTCHA_TEMPLATE % {
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'session': session,
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'myurl': "%s/auth/%s/fallback/web" % (
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CLIENT_V2_ALPHA_PREFIX, LoginType.RECAPTCHA
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),
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'sitekey': self.hs.config.recaptcha_public_key,
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}
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html_bytes = html.encode("utf8")
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request.setResponseCode(200)
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request.setHeader(b"Content-Type", b"text/html; charset=utf-8")
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request.setHeader(b"Server", self.hs.version_string)
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request.setHeader(b"Content-Length", b"%d" % (len(html_bytes),))
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request.write(html_bytes)
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request.finish()
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defer.returnValue(None)
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else:
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raise SynapseError(404, "Unknown auth stage type")
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@defer.inlineCallbacks
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def on_POST(self, request, stagetype):
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yield
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if stagetype == "m.login.recaptcha":
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if ('g-recaptcha-response' not in request.args or
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len(request.args['g-recaptcha-response'])) == 0:
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raise SynapseError(400, "No captcha response supplied")
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if ('session' not in request.args or
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len(request.args['session'])) == 0:
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raise SynapseError(400, "No session supplied")
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session = request.args['session'][0]
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authdict = {
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'response': request.args['g-recaptcha-response'][0],
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'session': session,
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}
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success = yield self.auth_handler.add_oob_auth(
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LoginType.RECAPTCHA,
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authdict,
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self.hs.get_ip_from_request(request)
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)
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if success:
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html = SUCCESS_TEMPLATE
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else:
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html = RECAPTCHA_TEMPLATE % {
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'session': session,
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'myurl': "%s/auth/%s/fallback/web" % (
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CLIENT_V2_ALPHA_PREFIX, LoginType.RECAPTCHA
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),
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'sitekey': self.hs.config.recaptcha_public_key,
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}
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html_bytes = html.encode("utf8")
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request.setResponseCode(200)
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request.setHeader(b"Content-Type", b"text/html; charset=utf-8")
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request.setHeader(b"Server", self.hs.version_string)
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request.setHeader(b"Content-Length", b"%d" % (len(html_bytes),))
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request.write(html_bytes)
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request.finish()
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defer.returnValue(None)
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else:
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raise SynapseError(404, "Unknown auth stage type")
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def on_OPTIONS(self, _):
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return 200, {}
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def register_servlets(hs, http_server):
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AuthRestServlet(hs).register(http_server)
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