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
|
# Copyright 2020 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 attr
from synapse.handlers.sso import MappingException
from tests.unittest import HomeserverTestCase, override_config
# These are a few constants that are used as config parameters in the tests.
BASE_URL = "https://synapse/"
@attr.s
class FakeAuthnResponse:
ava = attr.ib(type=dict)
class TestMappingProvider:
def __init__(self, config, module):
pass
@staticmethod
def parse_config(config):
return
@staticmethod
def get_saml_attributes(config):
return {"uid"}, {"displayName"}
def get_remote_user_id(self, saml_response, client_redirect_url):
return saml_response.ava["uid"]
def saml_response_to_user_attributes(
self, saml_response, failures, client_redirect_url
):
localpart = saml_response.ava["username"] + (str(failures) if failures else "")
return {"mxid_localpart": localpart, "displayname": None}
class SamlHandlerTestCase(HomeserverTestCase):
def default_config(self):
config = super().default_config()
config["public_baseurl"] = BASE_URL
saml_config = {
"sp_config": {"metadata": {}},
# Disable grandfathering.
"grandfathered_mxid_source_attribute": None,
"user_mapping_provider": {"module": __name__ + ".TestMappingProvider"},
}
# Update this config with what's in the default config so that
# override_config works as expected.
saml_config.update(config.get("saml2_config", {}))
config["saml2_config"] = saml_config
return config
def make_homeserver(self, reactor, clock):
hs = self.setup_test_homeserver()
self.handler = hs.get_saml_handler()
# Reduce the number of attempts when generating MXIDs.
sso_handler = hs.get_sso_handler()
sso_handler._MAP_USERNAME_RETRIES = 3
return hs
def test_map_saml_response_to_user(self):
"""Ensure that mapping the SAML response returned from a provider to an MXID works properly."""
saml_response = FakeAuthnResponse({"uid": "test_user", "username": "test_user"})
# The redirect_url doesn't matter with the default user mapping provider.
redirect_url = ""
mxid = self.get_success(
self.handler._map_saml_response_to_user(
saml_response, redirect_url, "user-agent", "10.10.10.10"
)
)
self.assertEqual(mxid, "@test_user:test")
@override_config({"saml2_config": {"grandfathered_mxid_source_attribute": "mxid"}})
def test_map_saml_response_to_existing_user(self):
"""Existing users can log in with SAML account."""
store = self.hs.get_datastore()
self.get_success(
store.register_user(user_id="@test_user:test", password_hash=None)
)
# Map a user via SSO.
saml_response = FakeAuthnResponse(
{"uid": "tester", "mxid": ["test_user"], "username": "test_user"}
)
redirect_url = ""
mxid = self.get_success(
self.handler._map_saml_response_to_user(
saml_response, redirect_url, "user-agent", "10.10.10.10"
)
)
self.assertEqual(mxid, "@test_user:test")
# Subsequent calls should map to the same mxid.
mxid = self.get_success(
self.handler._map_saml_response_to_user(
saml_response, redirect_url, "user-agent", "10.10.10.10"
)
)
self.assertEqual(mxid, "@test_user:test")
def test_map_saml_response_to_invalid_localpart(self):
"""If the mapping provider generates an invalid localpart it should be rejected."""
saml_response = FakeAuthnResponse({"uid": "test", "username": "föö"})
redirect_url = ""
e = self.get_failure(
self.handler._map_saml_response_to_user(
saml_response, redirect_url, "user-agent", "10.10.10.10"
),
MappingException,
)
self.assertEqual(str(e.value), "localpart is invalid: föö")
def test_map_saml_response_to_user_retries(self):
"""The mapping provider can retry generating an MXID if the MXID is already in use."""
store = self.hs.get_datastore()
self.get_success(
store.register_user(user_id="@test_user:test", password_hash=None)
)
saml_response = FakeAuthnResponse({"uid": "test", "username": "test_user"})
redirect_url = ""
mxid = self.get_success(
self.handler._map_saml_response_to_user(
saml_response, redirect_url, "user-agent", "10.10.10.10"
)
)
# test_user is already taken, so test_user1 gets registered instead.
self.assertEqual(mxid, "@test_user1:test")
# Register all of the potential mxids for a particular SAML username.
self.get_success(
store.register_user(user_id="@tester:test", password_hash=None)
)
for i in range(1, 3):
self.get_success(
store.register_user(user_id="@tester%d:test" % i, password_hash=None)
)
# Now attempt to map to a username, this will fail since all potential usernames are taken.
saml_response = FakeAuthnResponse({"uid": "tester", "username": "tester"})
e = self.get_failure(
self.handler._map_saml_response_to_user(
saml_response, redirect_url, "user-agent", "10.10.10.10"
),
MappingException,
)
self.assertEqual(
str(e.value), "Unable to generate a Matrix ID from the SSO response"
)
|
