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
|
# 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 typing import TYPE_CHECKING
from twisted.web.server import Request
from synapse.api.constants import LoginType
from synapse.api.errors import LoginError, SynapseError
from synapse.api.urls import CLIENT_API_PREFIX
from synapse.http.server import HttpServer, respond_with_html
from synapse.http.servlet import RestServlet, parse_string
from synapse.http.site import SynapseRequest
from ._base import client_patterns
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
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_patterns(r"/auth/(?P<stagetype>[\w\.]*)/fallback/web")
def __init__(self, hs: "HomeServer"):
super().__init__()
self.hs = hs
self.auth = hs.get_auth()
self.auth_handler = hs.get_auth_handler()
self.registration_handler = hs.get_registration_handler()
self.recaptcha_template = hs.config.captcha.recaptcha_template
self.terms_template = hs.config.consent.terms_template
self.registration_token_template = (
hs.config.registration.registration_token_template
)
self.success_template = hs.config.registration.fallback_success_template
async def on_GET(self, request: SynapseRequest, stagetype: str) -> None:
session = parse_string(request, "session")
if not session:
raise SynapseError(400, "No session supplied")
if stagetype == LoginType.RECAPTCHA:
html = self.recaptcha_template.render(
session=session,
myurl="%s/v3/auth/%s/fallback/web"
% (CLIENT_API_PREFIX, LoginType.RECAPTCHA),
sitekey=self.hs.config.captcha.recaptcha_public_key,
)
elif stagetype == LoginType.TERMS:
html = self.terms_template.render(
session=session,
terms_url="%s_matrix/consent?v=%s"
% (
self.hs.config.server.public_baseurl,
self.hs.config.consent.user_consent_version,
),
myurl="%s/v3/auth/%s/fallback/web"
% (CLIENT_API_PREFIX, LoginType.TERMS),
)
elif stagetype == LoginType.SSO:
# Display a confirmation page which prompts the user to
# re-authenticate with their SSO provider.
html = await self.auth_handler.start_sso_ui_auth(request, session)
elif stagetype == LoginType.REGISTRATION_TOKEN:
html = self.registration_token_template.render(
session=session,
myurl=f"{CLIENT_API_PREFIX}/r0/auth/{LoginType.REGISTRATION_TOKEN}/fallback/web",
)
else:
raise SynapseError(404, "Unknown auth stage type")
# Render the HTML and return.
respond_with_html(request, 200, html)
return None
async def on_POST(self, request: Request, stagetype: str) -> None:
session = parse_string(request, "session")
if not session:
raise SynapseError(400, "No session supplied")
if stagetype == LoginType.RECAPTCHA:
response = parse_string(request, "g-recaptcha-response")
if not response:
raise SynapseError(400, "No captcha response supplied")
authdict = {"response": response, "session": session}
try:
await self.auth_handler.add_oob_auth(
LoginType.RECAPTCHA, authdict, request.getClientIP()
)
except LoginError as e:
# Authentication failed, let user try again
html = self.recaptcha_template.render(
session=session,
myurl="%s/v3/auth/%s/fallback/web"
% (CLIENT_API_PREFIX, LoginType.RECAPTCHA),
sitekey=self.hs.config.captcha.recaptcha_public_key,
error=e.msg,
)
else:
# No LoginError was raised, so authentication was successful
html = self.success_template.render()
elif stagetype == LoginType.TERMS:
authdict = {"session": session}
try:
await self.auth_handler.add_oob_auth(
LoginType.TERMS, authdict, request.getClientIP()
)
except LoginError as e:
# Authentication failed, let user try again
html = self.terms_template.render(
session=session,
terms_url="%s_matrix/consent?v=%s"
% (
self.hs.config.server.public_baseurl,
self.hs.config.consent.user_consent_version,
),
myurl="%s/v3/auth/%s/fallback/web"
% (CLIENT_API_PREFIX, LoginType.TERMS),
error=e.msg,
)
else:
# No LoginError was raised, so authentication was successful
html = self.success_template.render()
elif stagetype == LoginType.SSO:
# The SSO fallback workflow should not post here,
raise SynapseError(404, "Fallback SSO auth does not support POST requests.")
elif stagetype == LoginType.REGISTRATION_TOKEN:
token = parse_string(request, "token", required=True)
authdict = {"session": session, "token": token}
try:
await self.auth_handler.add_oob_auth(
LoginType.REGISTRATION_TOKEN, authdict, request.getClientIP()
)
except LoginError as e:
html = self.registration_token_template.render(
session=session,
myurl=f"{CLIENT_API_PREFIX}/r0/auth/{LoginType.REGISTRATION_TOKEN}/fallback/web",
error=e.msg,
)
else:
html = self.success_template.render()
else:
raise SynapseError(404, "Unknown auth stage type")
# Render the HTML and return.
respond_with_html(request, 200, html)
return None
def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
AuthRestServlet(hs).register(http_server)
|
