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synapse/tests/rest/client/test_auth.py

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Python

# Copyright 2018 New Vector
# Copyright 2020-2021 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.
from http import HTTPStatus
from typing import Optional, Union
from twisted.internet.defer import succeed
import synapse.rest.admin
from synapse.api.constants import LoginType
from synapse.handlers.ui_auth.checkers import UserInteractiveAuthChecker
from synapse.rest.client import account, auth, devices, login, register
from synapse.rest.synapse.client import build_synapse_client_resource_tree
from synapse.types import JsonDict, UserID
from tests import unittest
from tests.handlers.test_oidc import HAS_OIDC
from tests.rest.client.utils import TEST_OIDC_CONFIG
from tests.server import FakeChannel
from tests.unittest import override_config, skip_unless
class DummyRecaptchaChecker(UserInteractiveAuthChecker):
def __init__(self, hs):
super().__init__(hs)
self.recaptcha_attempts = []
def check_auth(self, authdict, clientip):
self.recaptcha_attempts.append((authdict, clientip))
return succeed(True)
class FallbackAuthTests(unittest.HomeserverTestCase):
servlets = [
auth.register_servlets,
register.register_servlets,
]
hijack_auth = False
def make_homeserver(self, reactor, clock):
config = self.default_config()
config["enable_registration_captcha"] = True
config["recaptcha_public_key"] = "brokencake"
config["registrations_require_3pid"] = []
hs = self.setup_test_homeserver(config=config)
return hs
def prepare(self, reactor, clock, hs):
self.recaptcha_checker = DummyRecaptchaChecker(hs)
auth_handler = hs.get_auth_handler()
auth_handler.checkers[LoginType.RECAPTCHA] = self.recaptcha_checker
def register(self, expected_response: int, body: JsonDict) -> FakeChannel:
"""Make a register request."""
channel = self.make_request("POST", "register", body)
self.assertEqual(channel.code, expected_response)
return channel
def recaptcha(
self,
session: str,
expected_post_response: int,
post_session: Optional[str] = None,
) -> None:
"""Get and respond to a fallback recaptcha. Returns the second request."""
if post_session is None:
post_session = session
channel = self.make_request(
"GET", "auth/m.login.recaptcha/fallback/web?session=" + session
)
self.assertEqual(channel.code, 200)
channel = self.make_request(
"POST",
"auth/m.login.recaptcha/fallback/web?session="
+ post_session
+ "&g-recaptcha-response=a",
)
self.assertEqual(channel.code, expected_post_response)
# The recaptcha handler is called with the response given
attempts = self.recaptcha_checker.recaptcha_attempts
self.assertEqual(len(attempts), 1)
self.assertEqual(attempts[0][0]["response"], "a")
def test_fallback_captcha(self):
"""Ensure that fallback auth via a captcha works."""
# Returns a 401 as per the spec
channel = self.register(
401,
{"username": "user", "type": "m.login.password", "password": "bar"},
)
# Grab the session
session = channel.json_body["session"]
# Assert our configured public key is being given
self.assertEqual(
channel.json_body["params"]["m.login.recaptcha"]["public_key"], "brokencake"
)
# Complete the recaptcha step.
self.recaptcha(session, 200)
# also complete the dummy auth
self.register(200, {"auth": {"session": session, "type": "m.login.dummy"}})
# Now we should have fulfilled a complete auth flow, including
# the recaptcha fallback step, we can then send a
# request to the register API with the session in the authdict.
channel = self.register(200, {"auth": {"session": session}})
# We're given a registered user.
self.assertEqual(channel.json_body["user_id"], "@user:test")
def test_complete_operation_unknown_session(self):
"""
Attempting to mark an invalid session as complete should error.
"""
# Make the initial request to register. (Later on a different password
# will be used.)
# Returns a 401 as per the spec
channel = self.register(
401, {"username": "user", "type": "m.login.password", "password": "bar"}
)
# Grab the session
session = channel.json_body["session"]
# Assert our configured public key is being given
self.assertEqual(
channel.json_body["params"]["m.login.recaptcha"]["public_key"], "brokencake"
)
# Attempt to complete the recaptcha step with an unknown session.
# This results in an error.
self.recaptcha(session, 400, session + "unknown")
class UIAuthTests(unittest.HomeserverTestCase):
servlets = [
auth.register_servlets,
devices.register_servlets,
login.register_servlets,
synapse.rest.admin.register_servlets_for_client_rest_resource,
register.register_servlets,
]
def default_config(self):
config = super().default_config()
# public_baseurl uses an http:// scheme because FakeChannel.isSecure() returns
# False, so synapse will see the requested uri as http://..., so using http in
# the public_baseurl stops Synapse trying to redirect to https.
config["public_baseurl"] = "http://synapse.test"
if HAS_OIDC:
# we enable OIDC as a way of testing SSO flows
oidc_config = {}
oidc_config.update(TEST_OIDC_CONFIG)
oidc_config["allow_existing_users"] = True
config["oidc_config"] = oidc_config
return config
def create_resource_dict(self):
resource_dict = super().create_resource_dict()
resource_dict.update(build_synapse_client_resource_tree(self.hs))
return resource_dict
def prepare(self, reactor, clock, hs):
self.user_pass = "pass"
self.user = self.register_user("test", self.user_pass)
self.device_id = "dev1"
self.user_tok = self.login("test", self.user_pass, self.device_id)
def delete_device(
self,
access_token: str,
device: str,
expected_response: int,
body: Union[bytes, JsonDict] = b"",
) -> FakeChannel:
"""Delete an individual device."""
channel = self.make_request(
"DELETE",
"devices/" + device,
body,
access_token=access_token,
)
# Ensure the response is sane.
self.assertEqual(channel.code, expected_response)
return channel
def delete_devices(self, expected_response: int, body: JsonDict) -> FakeChannel:
"""Delete 1 or more devices."""
# Note that this uses the delete_devices endpoint so that we can modify
# the payload half-way through some tests.
channel = self.make_request(
"POST",
"delete_devices",
body,
access_token=self.user_tok,
)
# Ensure the response is sane.
self.assertEqual(channel.code, expected_response)
return channel
def test_ui_auth(self):
"""
Test user interactive authentication outside of registration.
"""
# Attempt to delete this device.
# Returns a 401 as per the spec
channel = self.delete_device(self.user_tok, self.device_id, 401)
# Grab the session
session = channel.json_body["session"]
# Ensure that flows are what is expected.
self.assertIn({"stages": ["m.login.password"]}, channel.json_body["flows"])
# Make another request providing the UI auth flow.
self.delete_device(
self.user_tok,
self.device_id,
200,
{
"auth": {
"type": "m.login.password",
"identifier": {"type": "m.id.user", "user": self.user},
"password": self.user_pass,
"session": session,
},
},
)
def test_grandfathered_identifier(self):
"""Check behaviour without "identifier" dict
Synapse used to require clients to submit a "user" field for m.login.password
UIA - check that still works.
"""
channel = self.delete_device(self.user_tok, self.device_id, 401)
session = channel.json_body["session"]
# Make another request providing the UI auth flow.
self.delete_device(
self.user_tok,
self.device_id,
200,
{
"auth": {
"type": "m.login.password",
"user": self.user,
"password": self.user_pass,
"session": session,
},
},
)
def test_can_change_body(self):
"""
The client dict can be modified during the user interactive authentication session.
Note that it is not spec compliant to modify the client dict during a
user interactive authentication session, but many clients currently do.
When Synapse is updated to be spec compliant, the call to re-use the
session ID should be rejected.
"""
# Create a second login.
self.login("test", self.user_pass, "dev2")
# Attempt to delete the first device.
# Returns a 401 as per the spec
channel = self.delete_devices(401, {"devices": [self.device_id]})
# Grab the session
session = channel.json_body["session"]
# Ensure that flows are what is expected.
self.assertIn({"stages": ["m.login.password"]}, channel.json_body["flows"])
# Make another request providing the UI auth flow, but try to delete the
# second device.
self.delete_devices(
200,
{
"devices": ["dev2"],
"auth": {
"type": "m.login.password",
"identifier": {"type": "m.id.user", "user": self.user},
"password": self.user_pass,
"session": session,
},
},
)
def test_cannot_change_uri(self):
"""
The initial requested URI cannot be modified during the user interactive authentication session.
"""
# Create a second login.
self.login("test", self.user_pass, "dev2")
# Attempt to delete the first device.
# Returns a 401 as per the spec
channel = self.delete_device(self.user_tok, self.device_id, 401)
# Grab the session
session = channel.json_body["session"]
# Ensure that flows are what is expected.
self.assertIn({"stages": ["m.login.password"]}, channel.json_body["flows"])
# Make another request providing the UI auth flow, but try to delete the
# second device. This results in an error.
#
# This makes use of the fact that the device ID is embedded into the URL.
self.delete_device(
self.user_tok,
"dev2",
403,
{
"auth": {
"type": "m.login.password",
"identifier": {"type": "m.id.user", "user": self.user},
"password": self.user_pass,
"session": session,
},
},
)
@unittest.override_config({"ui_auth": {"session_timeout": "5s"}})
def test_can_reuse_session(self):
"""
The session can be reused if configured.
Compare to test_cannot_change_uri.
"""
# Create a second and third login.
self.login("test", self.user_pass, "dev2")
self.login("test", self.user_pass, "dev3")
# Attempt to delete a device. This works since the user just logged in.
self.delete_device(self.user_tok, "dev2", 200)
# Move the clock forward past the validation timeout.
self.reactor.advance(6)
# Deleting another devices throws the user into UI auth.
channel = self.delete_device(self.user_tok, "dev3", 401)
# Grab the session
session = channel.json_body["session"]
# Ensure that flows are what is expected.
self.assertIn({"stages": ["m.login.password"]}, channel.json_body["flows"])
# Make another request providing the UI auth flow.
self.delete_device(
self.user_tok,
"dev3",
200,
{
"auth": {
"type": "m.login.password",
"identifier": {"type": "m.id.user", "user": self.user},
"password": self.user_pass,
"session": session,
},
},
)
# Make another request, but try to delete the first device. This works
# due to re-using the previous session.
#
# Note that *no auth* information is provided, not even a session iD!
self.delete_device(self.user_tok, self.device_id, 200)
@skip_unless(HAS_OIDC, "requires OIDC")
@override_config({"oidc_config": TEST_OIDC_CONFIG})
def test_ui_auth_via_sso(self):
"""Test a successful UI Auth flow via SSO
This includes:
* hitting the UIA SSO redirect endpoint
* checking it serves a confirmation page which links to the OIDC provider
* calling back to the synapse oidc callback
* checking that the original operation succeeds
"""
# log the user in
remote_user_id = UserID.from_string(self.user).localpart
login_resp = self.helper.login_via_oidc(remote_user_id)
self.assertEqual(login_resp["user_id"], self.user)
# initiate a UI Auth process by attempting to delete the device
channel = self.delete_device(self.user_tok, self.device_id, 401)
# check that SSO is offered
flows = channel.json_body["flows"]
self.assertIn({"stages": ["m.login.sso"]}, flows)
# run the UIA-via-SSO flow
session_id = channel.json_body["session"]
channel = self.helper.auth_via_oidc(
{"sub": remote_user_id}, ui_auth_session_id=session_id
)
# that should serve a confirmation page
self.assertEqual(channel.code, 200, channel.result)
# and now the delete request should succeed.
self.delete_device(
self.user_tok,
self.device_id,
200,
body={"auth": {"session": session_id}},
)
@skip_unless(HAS_OIDC, "requires OIDC")
@override_config({"oidc_config": TEST_OIDC_CONFIG})
def test_does_not_offer_password_for_sso_user(self):
login_resp = self.helper.login_via_oidc("username")
user_tok = login_resp["access_token"]
device_id = login_resp["device_id"]
# now call the device deletion API: we should get the option to auth with SSO
# and not password.
channel = self.delete_device(user_tok, device_id, 401)
flows = channel.json_body["flows"]
self.assertEqual(flows, [{"stages": ["m.login.sso"]}])
def test_does_not_offer_sso_for_password_user(self):
channel = self.delete_device(self.user_tok, self.device_id, 401)
flows = channel.json_body["flows"]
self.assertEqual(flows, [{"stages": ["m.login.password"]}])
@skip_unless(HAS_OIDC, "requires OIDC")
@override_config({"oidc_config": TEST_OIDC_CONFIG})
def test_offers_both_flows_for_upgraded_user(self):
"""A user that had a password and then logged in with SSO should get both flows"""
login_resp = self.helper.login_via_oidc(UserID.from_string(self.user).localpart)
self.assertEqual(login_resp["user_id"], self.user)
channel = self.delete_device(self.user_tok, self.device_id, 401)
flows = channel.json_body["flows"]
# we have no particular expectations of ordering here
self.assertIn({"stages": ["m.login.password"]}, flows)
self.assertIn({"stages": ["m.login.sso"]}, flows)
self.assertEqual(len(flows), 2)
@skip_unless(HAS_OIDC, "requires OIDC")
@override_config({"oidc_config": TEST_OIDC_CONFIG})
def test_ui_auth_fails_for_incorrect_sso_user(self):
"""If the user tries to authenticate with the wrong SSO user, they get an error"""
# log the user in
login_resp = self.helper.login_via_oidc(UserID.from_string(self.user).localpart)
self.assertEqual(login_resp["user_id"], self.user)
# start a UI Auth flow by attempting to delete a device
channel = self.delete_device(self.user_tok, self.device_id, 401)
flows = channel.json_body["flows"]
self.assertIn({"stages": ["m.login.sso"]}, flows)
session_id = channel.json_body["session"]
# do the OIDC auth, but auth as the wrong user
channel = self.helper.auth_via_oidc(
{"sub": "wrong_user"}, ui_auth_session_id=session_id
)
# that should return a failure message
self.assertSubstring("We were unable to validate", channel.text_body)
# ... and the delete op should now fail with a 403
self.delete_device(
self.user_tok, self.device_id, 403, body={"auth": {"session": session_id}}
)
class RefreshAuthTests(unittest.HomeserverTestCase):
servlets = [
auth.register_servlets,
account.register_servlets,
login.register_servlets,
synapse.rest.admin.register_servlets_for_client_rest_resource,
register.register_servlets,
]
hijack_auth = False
def prepare(self, reactor, clock, hs):
self.user_pass = "pass"
self.user = self.register_user("test", self.user_pass)
def use_refresh_token(self, refresh_token: str) -> FakeChannel:
"""
Helper that makes a request to use a refresh token.
"""
return self.make_request(
"POST",
"/_matrix/client/unstable/org.matrix.msc2918.refresh_token/refresh",
{"refresh_token": refresh_token},
)
def test_login_issue_refresh_token(self):
"""
A login response should include a refresh_token only if asked.
"""
# Test login
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
}
login_without_refresh = self.make_request(
"POST", "/_matrix/client/r0/login", body
)
self.assertEqual(login_without_refresh.code, 200, login_without_refresh.result)
self.assertNotIn("refresh_token", login_without_refresh.json_body)
login_with_refresh = self.make_request(
"POST",
"/_matrix/client/r0/login",
{"org.matrix.msc2918.refresh_token": True, **body},
)
self.assertEqual(login_with_refresh.code, 200, login_with_refresh.result)
self.assertIn("refresh_token", login_with_refresh.json_body)
self.assertIn("expires_in_ms", login_with_refresh.json_body)
def test_register_issue_refresh_token(self):
"""
A register response should include a refresh_token only if asked.
"""
register_without_refresh = self.make_request(
"POST",
"/_matrix/client/r0/register",
{
"username": "test2",
"password": self.user_pass,
"auth": {"type": LoginType.DUMMY},
},
)
self.assertEqual(
register_without_refresh.code, 200, register_without_refresh.result
)
self.assertNotIn("refresh_token", register_without_refresh.json_body)
register_with_refresh = self.make_request(
"POST",
"/_matrix/client/r0/register",
{
"username": "test3",
"password": self.user_pass,
"auth": {"type": LoginType.DUMMY},
"org.matrix.msc2918.refresh_token": True,
},
)
self.assertEqual(register_with_refresh.code, 200, register_with_refresh.result)
self.assertIn("refresh_token", register_with_refresh.json_body)
self.assertIn("expires_in_ms", register_with_refresh.json_body)
def test_token_refresh(self):
"""
A refresh token can be used to issue a new access token.
"""
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
"org.matrix.msc2918.refresh_token": True,
}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login",
body,
)
self.assertEqual(login_response.code, 200, login_response.result)
refresh_response = self.make_request(
"POST",
"/_matrix/client/unstable/org.matrix.msc2918.refresh_token/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(refresh_response.code, 200, refresh_response.result)
self.assertIn("access_token", refresh_response.json_body)
self.assertIn("refresh_token", refresh_response.json_body)
self.assertIn("expires_in_ms", refresh_response.json_body)
# The access and refresh tokens should be different from the original ones after refresh
self.assertNotEqual(
login_response.json_body["access_token"],
refresh_response.json_body["access_token"],
)
self.assertNotEqual(
login_response.json_body["refresh_token"],
refresh_response.json_body["refresh_token"],
)
@override_config({"refreshable_access_token_lifetime": "1m"})
def test_refreshable_access_token_expiration(self):
"""
The access token should have some time as specified in the config.
"""
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
"org.matrix.msc2918.refresh_token": True,
}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login",
body,
)
self.assertEqual(login_response.code, 200, login_response.result)
self.assertApproximates(
login_response.json_body["expires_in_ms"], 60 * 1000, 100
)
refresh_response = self.make_request(
"POST",
"/_matrix/client/unstable/org.matrix.msc2918.refresh_token/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(refresh_response.code, 200, refresh_response.result)
self.assertApproximates(
refresh_response.json_body["expires_in_ms"], 60 * 1000, 100
)
access_token = refresh_response.json_body["access_token"]
# Advance 59 seconds in the future (just shy of 1 minute, the time of expiry)
self.reactor.advance(59.0)
# Check that our token is valid
self.assertEqual(
self.make_request(
"GET", "/_matrix/client/v3/account/whoami", access_token=access_token
).code,
HTTPStatus.OK,
)
# Advance 2 more seconds (just past the time of expiry)
self.reactor.advance(2.0)
# Check that our token is invalid
self.assertEqual(
self.make_request(
"GET", "/_matrix/client/v3/account/whoami", access_token=access_token
).code,
HTTPStatus.UNAUTHORIZED,
)
@override_config(
{"refreshable_access_token_lifetime": "1m", "refresh_token_lifetime": "2m"}
)
def test_refresh_token_expiry(self):
"""
The refresh token can be configured to have a limited lifetime.
When that lifetime has ended, the refresh token can no longer be used to
refresh the session.
"""
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
"org.matrix.msc2918.refresh_token": True,
}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login",
body,
)
self.assertEqual(login_response.code, HTTPStatus.OK, login_response.result)
refresh_token1 = login_response.json_body["refresh_token"]
# Advance 119 seconds in the future (just shy of 2 minutes)
self.reactor.advance(119.0)
# Refresh our session. The refresh token should still JUST be valid right now.
# By doing so, we get a new access token and a new refresh token.
refresh_response = self.use_refresh_token(refresh_token1)
self.assertEqual(refresh_response.code, HTTPStatus.OK, refresh_response.result)
self.assertIn(
"refresh_token",
refresh_response.json_body,
"No new refresh token returned after refresh.",
)
refresh_token2 = refresh_response.json_body["refresh_token"]
# Advance 121 seconds in the future (just a bit more than 2 minutes)
self.reactor.advance(121.0)
# Try to refresh our session, but instead notice that the refresh token is
# not valid (it just expired).
refresh_response = self.use_refresh_token(refresh_token2)
self.assertEqual(
refresh_response.code, HTTPStatus.FORBIDDEN, refresh_response.result
)
@override_config(
{
"refreshable_access_token_lifetime": "2m",
"refresh_token_lifetime": "2m",
"session_lifetime": "3m",
}
)
def test_ultimate_session_expiry(self):
"""
The session can be configured to have an ultimate, limited lifetime.
"""
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
"org.matrix.msc2918.refresh_token": True,
}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login",
body,
)
self.assertEqual(login_response.code, 200, login_response.result)
refresh_token = login_response.json_body["refresh_token"]
# Advance shy of 2 minutes into the future
self.reactor.advance(119.0)
# Refresh our session. The refresh token should still be valid right now.
refresh_response = self.use_refresh_token(refresh_token)
self.assertEqual(refresh_response.code, 200, refresh_response.result)
self.assertIn(
"refresh_token",
refresh_response.json_body,
"No new refresh token returned after refresh.",
)
# Notice that our access token lifetime has been diminished to match the
# session lifetime.
# 3 minutes - 119 seconds = 61 seconds.
self.assertEqual(refresh_response.json_body["expires_in_ms"], 61_000)
refresh_token = refresh_response.json_body["refresh_token"]
# Advance 61 seconds into the future. Our session should have expired
# now, because we've had our 3 minutes.
self.reactor.advance(61.0)
# Try to issue a new, refreshed, access token.
# This should fail because the refresh token's lifetime has also been
# diminished as our session expired.
refresh_response = self.use_refresh_token(refresh_token)
self.assertEqual(refresh_response.code, 403, refresh_response.result)
def test_refresh_token_invalidation(self):
"""Refresh tokens are invalidated after first use of the next token.
A refresh token is considered invalid if:
- it was already used at least once
- and either
- the next access token was used
- the next refresh token was used
The chain of tokens goes like this:
login -|-> first_refresh -> third_refresh (fails)
|-> second_refresh -> fifth_refresh
|-> fourth_refresh (fails)
"""
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
"org.matrix.msc2918.refresh_token": True,
}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login",
body,
)
self.assertEqual(login_response.code, 200, login_response.result)
# This first refresh should work properly
first_refresh_response = self.make_request(
"POST",
"/_matrix/client/unstable/org.matrix.msc2918.refresh_token/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(
first_refresh_response.code, 200, first_refresh_response.result
)
# This one as well, since the token in the first one was never used
second_refresh_response = self.make_request(
"POST",
"/_matrix/client/unstable/org.matrix.msc2918.refresh_token/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(
second_refresh_response.code, 200, second_refresh_response.result
)
# This one should not, since the token from the first refresh is not valid anymore
third_refresh_response = self.make_request(
"POST",
"/_matrix/client/unstable/org.matrix.msc2918.refresh_token/refresh",
{"refresh_token": first_refresh_response.json_body["refresh_token"]},
)
self.assertEqual(
third_refresh_response.code, 401, third_refresh_response.result
)
# The associated access token should also be invalid
whoami_response = self.make_request(
"GET",
"/_matrix/client/r0/account/whoami",
access_token=first_refresh_response.json_body["access_token"],
)
self.assertEqual(whoami_response.code, 401, whoami_response.result)
# But all other tokens should work (they will expire after some time)
for access_token in [
second_refresh_response.json_body["access_token"],
login_response.json_body["access_token"],
]:
whoami_response = self.make_request(
"GET", "/_matrix/client/r0/account/whoami", access_token=access_token
)
self.assertEqual(whoami_response.code, 200, whoami_response.result)
# Now that the access token from the last valid refresh was used once, refreshing with the N-1 token should fail
fourth_refresh_response = self.make_request(
"POST",
"/_matrix/client/unstable/org.matrix.msc2918.refresh_token/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(
fourth_refresh_response.code, 403, fourth_refresh_response.result
)
# But refreshing from the last valid refresh token still works
fifth_refresh_response = self.make_request(
"POST",
"/_matrix/client/unstable/org.matrix.msc2918.refresh_token/refresh",
{"refresh_token": second_refresh_response.json_body["refresh_token"]},
)
self.assertEqual(
fifth_refresh_response.code, 200, fifth_refresh_response.result
)