1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket Ltd
#
# 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 twisted.internet import defer
from synapse.api.constants import LoginType
from synapse.api.errors import SynapseError
from synapse.api.urls import CLIENT_V2_ALPHA_PREFIX
from synapse.http.server import finish_request
from synapse.http.servlet import RestServlet
from ._base import client_v2_patterns
logger = logging.getLogger(__name__)
RECAPTCHA_TEMPLATE = """
<html>
<head>
<title>Authentication</title>
<meta name='viewport' content='width=device-width, initial-scale=1,
user-scalable=no, minimum-scale=1.0, maximum-scale=1.0'>
<script src="https://www.google.com/recaptcha/api.js"
async defer></script>
<script src="//code.jquery.com/jquery-1.11.2.min.js"></script>
<link rel="stylesheet" href="/_matrix/static/client/register/style.css">
<script>
function captchaDone() {
$('#registrationForm').submit();
}
</script>
</head>
<body>
<form id="registrationForm" method="post" action="%(myurl)s">
<div>
<p>
Hello! We need to prevent computer programs and other automated
things from creating accounts on this server.
</p>
<p>
Please verify that you're not a robot.
</p>
<input type="hidden" name="session" value="%(session)s" />
<div class="g-recaptcha"
data-sitekey="%(sitekey)s"
data-callback="captchaDone">
</div>
<noscript>
<input type="submit" value="All Done" />
</noscript>
</div>
</div>
</form>
</body>
</html>
"""
TERMS_TEMPLATE = """
<html>
<head>
<title>Authentication</title>
<meta name='viewport' content='width=device-width, initial-scale=1,
user-scalable=no, minimum-scale=1.0, maximum-scale=1.0'>
<link rel="stylesheet" href="/_matrix/static/client/register/style.css">
</head>
<body>
<form id="registrationForm" method="post" action="%(myurl)s">
<div>
<p>
Please click the button below if you agree to the
<a href="%(terms_url)s">privacy policy of this homeserver.</a>
</p>
<input type="hidden" name="session" value="%(session)s" />
<input type="submit" value="Agree" />
</div>
</form>
</body>
</html>
"""
SUCCESS_TEMPLATE = """
<html>
<head>
<title>Success!</title>
<meta name='viewport' content='width=device-width, initial-scale=1,
user-scalable=no, minimum-scale=1.0, maximum-scale=1.0'>
<link rel="stylesheet" href="/_matrix/static/client/register/style.css">
<script>
if (window.onAuthDone) {
window.onAuthDone();
} else if (window.opener && window.opener.postMessage) {
window.opener.postMessage("authDone", "*");
}
</script>
</head>
<body>
<div>
<p>Thank you</p>
<p>You may now close this window and return to the application</p>
</div>
</body>
</html>
"""
class AuthRestServlet(RestServlet):
"""
Handles Client / Server API authentication in any situations where it
cannot be handled in the normal flow (with requests to the same endpoint).
Current use is for web fallback auth.
"""
PATTERNS = client_v2_patterns("/auth/(?P<stagetype>[\w\.]*)/fallback/web")
def __init__(self, hs):
super(AuthRestServlet, self).__init__()
self.hs = hs
self.auth = hs.get_auth()
self.auth_handler = hs.get_auth_handler()
self.registration_handler = hs.get_handlers().registration_handler
@defer.inlineCallbacks
def on_GET(self, request, stagetype):
yield
if stagetype == LoginType.RECAPTCHA:
if ('session' not in request.args or
len(request.args['session']) == 0):
raise SynapseError(400, "No session supplied")
session = request.args["session"][0]
html = RECAPTCHA_TEMPLATE % {
'session': session,
'myurl': "%s/auth/%s/fallback/web" % (
CLIENT_V2_ALPHA_PREFIX, LoginType.RECAPTCHA
),
'sitekey': self.hs.config.recaptcha_public_key,
}
html_bytes = html.encode("utf8")
request.setResponseCode(200)
request.setHeader(b"Content-Type", b"text/html; charset=utf-8")
request.setHeader(b"Content-Length", b"%d" % (len(html_bytes),))
request.write(html_bytes)
finish_request(request)
defer.returnValue(None)
elif stagetype == LoginType.TERMS:
session = request.args['session'][0]
html = TERMS_TEMPLATE % {
'session': session,
'terms_url': "%s/_matrix/consent" % (
self.hs.config.public_baseurl,
),
'myurl': "%s/auth/%s/fallback/web" % (
CLIENT_V2_ALPHA_PREFIX, LoginType.TERMS
),
}
html_bytes = html.encode("utf8")
request.setResponseCode(200)
request.setHeader(b"Content-Type", b"text/html; charset=utf-8")
request.setHeader(b"Content-Length", b"%d" % (len(html_bytes),))
request.write(html_bytes)
finish_request(request)
defer.returnValue(None)
else:
raise SynapseError(404, "Unknown auth stage type")
@defer.inlineCallbacks
def on_POST(self, request, stagetype):
yield
if stagetype == LoginType.RECAPTCHA:
if ('g-recaptcha-response' not in request.args or
len(request.args['g-recaptcha-response'])) == 0:
raise SynapseError(400, "No captcha response supplied")
if ('session' not in request.args or
len(request.args['session'])) == 0:
raise SynapseError(400, "No session supplied")
session = request.args['session'][0]
authdict = {
'response': request.args['g-recaptcha-response'][0],
'session': session,
}
success = yield self.auth_handler.add_oob_auth(
LoginType.RECAPTCHA,
authdict,
self.hs.get_ip_from_request(request)
)
if success:
html = SUCCESS_TEMPLATE
else:
html = RECAPTCHA_TEMPLATE % {
'session': session,
'myurl': "%s/auth/%s/fallback/web" % (
CLIENT_V2_ALPHA_PREFIX, LoginType.RECAPTCHA
),
'sitekey': self.hs.config.recaptcha_public_key,
}
html_bytes = html.encode("utf8")
request.setResponseCode(200)
request.setHeader(b"Content-Type", b"text/html; charset=utf-8")
request.setHeader(b"Content-Length", b"%d" % (len(html_bytes),))
request.write(html_bytes)
finish_request(request)
defer.returnValue(None)
elif stagetype == LoginType.TERMS:
if ('session' not in request.args or
len(request.args['session'])) == 0:
raise SynapseError(400, "No session supplied")
session = request.args['session'][0]
authdict = {'session': session}
success = yield self.auth_handler.add_oob_auth(
LoginType.TERMS,
authdict,
self.hs.get_ip_from_request(request)
)
if success:
html = SUCCESS_TEMPLATE
else:
html = TERMS_TEMPLATE % {
'session': session,
'terms_url': "%s/_matrix/consent" % (
self.hs.config.public_baseurl,
),
'myurl': "%s/auth/%s/fallback/web" % (
CLIENT_V2_ALPHA_PREFIX, LoginType.TERMS
),
}
html_bytes = html.encode("utf8")
request.setResponseCode(200)
request.setHeader(b"Content-Type", b"text/html; charset=utf-8")
request.setHeader(b"Content-Length", b"%d" % (len(html_bytes),))
request.write(html_bytes)
finish_request(request)
defer.returnValue(None)
else:
raise SynapseError(404, "Unknown auth stage type")
def on_OPTIONS(self, _):
return 200, {}
def register_servlets(hs, http_server):
AuthRestServlet(hs).register(http_server)
|
