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synapse/tests/rest/client/test_auth.py
Erik Johnston 23740eaa3d
Correctly mention previous copyright (#16820) 
During the migration the automated script to update the copyright
headers accidentally got rid of some of the existing copyright lines.
Reinstate them.
2024-01-23 11:26:48 +00:00

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#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright 2020-2021 The Matrix.org Foundation C.I.C
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
import re
from http import HTTPStatus
from typing import Any, Dict, List, Optional, Tuple, Union
from twisted.internet.defer import succeed
from twisted.test.proto_helpers import MemoryReactor
from twisted.web.resource import Resource
import synapse.rest.admin
from synapse.api.constants import ApprovalNoticeMedium, LoginType
from synapse.api.errors import Codes, SynapseError
from synapse.handlers.ui_auth.checkers import UserInteractiveAuthChecker
from synapse.rest.client import account, auth, devices, login, logout, register
from synapse.rest.synapse.client import build_synapse_client_resource_tree
from synapse.server import HomeServer
from synapse.storage.database import LoggingTransaction
from synapse.types import JsonDict, UserID
from synapse.util import Clock
from tests import unittest
from tests.handlers.test_oidc import HAS_OIDC
from tests.rest.client.utils import TEST_OIDC_CONFIG, TEST_OIDC_ISSUER
from tests.server import FakeChannel
from tests.unittest import override_config, skip_unless
class DummyRecaptchaChecker(UserInteractiveAuthChecker):
def __init__(self, hs: HomeServer) -> None:
super().__init__(hs)
self.recaptcha_attempts: List[Tuple[dict, str]] = []
def is_enabled(self) -> bool:
return True
def check_auth(self, authdict: dict, clientip: str) -> Any:
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: MemoryReactor, clock: Clock) -> HomeServer:
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: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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, HTTPStatus.OK)
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) -> None:
"""Ensure that fallback auth via a captcha works."""
# Returns a 401 as per the spec
channel = self.register(
HTTPStatus.UNAUTHORIZED,
{"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, HTTPStatus.OK)
# also complete the dummy auth
self.register(
HTTPStatus.OK, {"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(HTTPStatus.OK, {"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) -> None:
"""
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(
HTTPStatus.UNAUTHORIZED,
{"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) -> Dict[str, Any]:
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) -> Dict[str, Resource]:
resource_dict = super().create_resource_dict()
resource_dict.update(build_synapse_client_resource_tree(self.hs))
return resource_dict
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
self.user_pass = "pass"
self.user = self.register_user("test", self.user_pass)
self.device_id = "dev1"
# Force-enable password login for just long enough to log in.
auth_handler = self.hs.get_auth_handler()
allow_auth_for_login = auth_handler._password_enabled_for_login
auth_handler._password_enabled_for_login = True
self.user_tok = self.login("test", self.user_pass, self.device_id)
# Restore password login to however it was.
auth_handler._password_enabled_for_login = allow_auth_for_login
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) -> None:
"""
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, HTTPStatus.UNAUTHORIZED
)
# 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,
HTTPStatus.OK,
{
"auth": {
"type": "m.login.password",
"identifier": {"type": "m.id.user", "user": self.user},
"password": self.user_pass,
"session": session,
},
},
)
@override_config({"password_config": {"enabled": "only_for_reauth"}})
def test_ui_auth_with_passwords_for_reauth_only(self) -> None:
"""
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, HTTPStatus.UNAUTHORIZED
)
# 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,
HTTPStatus.OK,
{
"auth": {
"type": "m.login.password",
"identifier": {"type": "m.id.user", "user": self.user},
"password": self.user_pass,
"session": session,
},
},
)
def test_grandfathered_identifier(self) -> None:
"""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, HTTPStatus.UNAUTHORIZED
)
session = channel.json_body["session"]
# Make another request providing the UI auth flow.
self.delete_device(
self.user_tok,
self.device_id,
HTTPStatus.OK,
{
"auth": {
"type": "m.login.password",
"user": self.user,
"password": self.user_pass,
"session": session,
},
},
)
def test_can_change_body(self) -> None:
"""
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(
HTTPStatus.UNAUTHORIZED, {"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(
HTTPStatus.OK,
{
"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) -> None:
"""
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, HTTPStatus.UNAUTHORIZED
)
# 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",
HTTPStatus.FORBIDDEN,
{
"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) -> None:
"""
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", HTTPStatus.OK)
# 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", HTTPStatus.UNAUTHORIZED)
# 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",
HTTPStatus.OK,
{
"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, HTTPStatus.OK)
@skip_unless(HAS_OIDC, "requires OIDC")
@override_config({"oidc_config": TEST_OIDC_CONFIG})
def test_ui_auth_via_sso(self) -> None:
"""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
"""
fake_oidc_server = self.helper.fake_oidc_server()
# log the user in
remote_user_id = UserID.from_string(self.user).localpart
login_resp, _ = self.helper.login_via_oidc(fake_oidc_server, 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, HTTPStatus.UNAUTHORIZED
)
# 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(
fake_oidc_server, {"sub": remote_user_id}, ui_auth_session_id=session_id
)
# that should serve a confirmation page
self.assertEqual(channel.code, HTTPStatus.OK, channel.result)
# and now the delete request should succeed.
self.delete_device(
self.user_tok,
self.device_id,
HTTPStatus.OK,
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) -> None:
fake_oidc_server = self.helper.fake_oidc_server()
login_resp, _ = self.helper.login_via_oidc(fake_oidc_server, "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, HTTPStatus.UNAUTHORIZED)
flows = channel.json_body["flows"]
self.assertEqual(flows, [{"stages": ["m.login.sso"]}])
def test_does_not_offer_sso_for_password_user(self) -> None:
channel = self.delete_device(
self.user_tok, self.device_id, HTTPStatus.UNAUTHORIZED
)
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) -> None:
"""A user that had a password and then logged in with SSO should get both flows"""
fake_oidc_server = self.helper.fake_oidc_server()
login_resp, _ = self.helper.login_via_oidc(
fake_oidc_server, UserID.from_string(self.user).localpart
)
self.assertEqual(login_resp["user_id"], self.user)
channel = self.delete_device(
self.user_tok, self.device_id, HTTPStatus.UNAUTHORIZED
)
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) -> None:
"""If the user tries to authenticate with the wrong SSO user, they get an error"""
fake_oidc_server = self.helper.fake_oidc_server()
# log the user in
login_resp, _ = self.helper.login_via_oidc(
fake_oidc_server, 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, HTTPStatus.UNAUTHORIZED
)
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(
fake_oidc_server, {"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,
HTTPStatus.FORBIDDEN,
body={"auth": {"session": session_id}},
)
@skip_unless(HAS_OIDC, "requires OIDC")
@override_config(
{
"oidc_config": TEST_OIDC_CONFIG,
"experimental_features": {
"msc3866": {
"enabled": True,
"require_approval_for_new_accounts": True,
}
},
}
)
def test_sso_not_approved(self) -> None:
"""Tests that if we register a user via SSO while requiring approval for new
accounts, we still raise the correct error before logging the user in.
"""
fake_oidc_server = self.helper.fake_oidc_server()
login_resp, _ = self.helper.login_via_oidc(
fake_oidc_server, "username", expected_status=403
)
self.assertEqual(login_resp["errcode"], Codes.USER_AWAITING_APPROVAL)
self.assertEqual(
ApprovalNoticeMedium.NONE, login_resp["approval_notice_medium"]
)
# Check that we didn't register a device for the user during the login attempt.
devices = self.get_success(
self.hs.get_datastores().main.get_devices_by_user("@username:test")
)
self.assertEqual(len(devices), 0)
class RefreshAuthTests(unittest.HomeserverTestCase):
servlets = [
auth.register_servlets,
account.register_servlets,
login.register_servlets,
logout.register_servlets,
synapse.rest.admin.register_servlets_for_client_rest_resource,
register.register_servlets,
]
hijack_auth = False
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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/v3/refresh",
{"refresh_token": refresh_token},
)
def test_login_issue_refresh_token(self) -> None:
"""
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, HTTPStatus.OK, login_without_refresh.result
)
self.assertNotIn("refresh_token", login_without_refresh.json_body)
login_with_refresh = self.make_request(
"POST",
"/_matrix/client/r0/login",
{"refresh_token": True, **body},
)
self.assertEqual(
login_with_refresh.code, HTTPStatus.OK, 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) -> None:
"""
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,
HTTPStatus.OK,
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},
"refresh_token": True,
},
)
self.assertEqual(
register_with_refresh.code, HTTPStatus.OK, 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) -> None:
"""
A refresh token can be used to issue a new access token.
"""
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
"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_response = self.make_request(
"POST",
"/_matrix/client/v3/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(refresh_response.code, HTTPStatus.OK, 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) -> None:
"""
The access token should have some time as specified in the config.
"""
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
"refresh_token": True,
}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login",
body,
)
self.assertEqual(login_response.code, HTTPStatus.OK, login_response.result)
self.assertApproximates(
login_response.json_body["expires_in_ms"], 60 * 1000, 100
)
refresh_response = self.make_request(
"POST",
"/_matrix/client/v3/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(refresh_response.code, HTTPStatus.OK, 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",
"nonrefreshable_access_token_lifetime": "10m",
}
)
def test_different_expiry_for_refreshable_and_nonrefreshable_access_tokens(
self,
) -> None:
"""
Tests that the expiry times for refreshable and non-refreshable access
tokens can be different.
"""
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
}
login_response1 = self.make_request(
"POST",
"/_matrix/client/r0/login",
{"refresh_token": True, **body},
)
self.assertEqual(login_response1.code, HTTPStatus.OK, login_response1.result)
self.assertApproximates(
login_response1.json_body["expires_in_ms"], 60 * 1000, 100
)
refreshable_access_token = login_response1.json_body["access_token"]
login_response2 = self.make_request(
"POST",
"/_matrix/client/r0/login",
body,
)
self.assertEqual(login_response2.code, HTTPStatus.OK, login_response2.result)
nonrefreshable_access_token = login_response2.json_body["access_token"]
# Advance 59 seconds in the future (just shy of 1 minute, the time of expiry)
self.reactor.advance(59.0)
# Both tokens should still be valid.
self.helper.whoami(refreshable_access_token, expect_code=HTTPStatus.OK)
self.helper.whoami(nonrefreshable_access_token, expect_code=HTTPStatus.OK)
# Advance to 61 s (just past 1 minute, the time of expiry)
self.reactor.advance(2.0)
# Only the non-refreshable token is still valid.
self.helper.whoami(
refreshable_access_token, expect_code=HTTPStatus.UNAUTHORIZED
)
self.helper.whoami(nonrefreshable_access_token, expect_code=HTTPStatus.OK)
# Advance to 599 s (just shy of 10 minutes, the time of expiry)
self.reactor.advance(599.0 - 61.0)
# It's still the case that only the non-refreshable token is still valid.
self.helper.whoami(
refreshable_access_token, expect_code=HTTPStatus.UNAUTHORIZED
)
self.helper.whoami(nonrefreshable_access_token, expect_code=HTTPStatus.OK)
# Advance to 601 s (just past 10 minutes, the time of expiry)
self.reactor.advance(2.0)
# Now neither token is valid.
self.helper.whoami(
refreshable_access_token, expect_code=HTTPStatus.UNAUTHORIZED
)
self.helper.whoami(
nonrefreshable_access_token, expect_code=HTTPStatus.UNAUTHORIZED
)
@override_config(
{"refreshable_access_token_lifetime": "1m", "refresh_token_lifetime": "2m"}
)
def test_refresh_token_expiry(self) -> None:
"""
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,
"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) -> None:
"""
The session can be configured to have an ultimate, limited lifetime.
"""
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
"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_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, HTTPStatus.OK, 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, HTTPStatus.FORBIDDEN, refresh_response.result
)
def test_refresh_token_invalidation(self) -> None:
"""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,
"refresh_token": True,
}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login",
body,
)
self.assertEqual(login_response.code, HTTPStatus.OK, login_response.result)
# This first refresh should work properly
first_refresh_response = self.make_request(
"POST",
"/_matrix/client/v3/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(
first_refresh_response.code, HTTPStatus.OK, 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/v3/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(
second_refresh_response.code, HTTPStatus.OK, 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/v3/refresh",
{"refresh_token": first_refresh_response.json_body["refresh_token"]},
)
self.assertEqual(
third_refresh_response.code,
HTTPStatus.UNAUTHORIZED,
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, HTTPStatus.UNAUTHORIZED, 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, HTTPStatus.OK, 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/v3/refresh",
{"refresh_token": login_response.json_body["refresh_token"]},
)
self.assertEqual(
fourth_refresh_response.code,
HTTPStatus.FORBIDDEN,
fourth_refresh_response.result,
)
# But refreshing from the last valid refresh token still works
fifth_refresh_response = self.make_request(
"POST",
"/_matrix/client/v3/refresh",
{"refresh_token": second_refresh_response.json_body["refresh_token"]},
)
self.assertEqual(
fifth_refresh_response.code, HTTPStatus.OK, fifth_refresh_response.result
)
def test_many_token_refresh(self) -> None:
"""
If a refresh is performed many times during a session, there shouldn't be
extra 'cruft' built up over time.
This test was written specifically to troubleshoot a case where logout
was very slow if a lot of refreshes had been performed for the session.
"""
def _refresh(refresh_token: str) -> Tuple[str, str]:
"""
Performs one refresh, returning the next refresh token and access token.
"""
refresh_response = self.use_refresh_token(refresh_token)
self.assertEqual(
refresh_response.code, HTTPStatus.OK, refresh_response.result
)
return (
refresh_response.json_body["refresh_token"],
refresh_response.json_body["access_token"],
)
def _table_length(table_name: str) -> int:
"""
Helper to get the size of a table, in rows.
For testing only; trivially vulnerable to SQL injection.
"""
def _txn(txn: LoggingTransaction) -> int:
txn.execute(f"SELECT COUNT(1) FROM {table_name}")
row = txn.fetchone()
# Query is infallible
assert row is not None
return row[0]
return self.get_success(
self.hs.get_datastores().main.db_pool.runInteraction(
"_table_length", _txn
)
)
# Before we log in, there are no access tokens.
self.assertEqual(_table_length("access_tokens"), 0)
self.assertEqual(_table_length("refresh_tokens"), 0)
body = {
"type": "m.login.password",
"user": "test",
"password": self.user_pass,
"refresh_token": True,
}
login_response = self.make_request(
"POST",
"/_matrix/client/v3/login",
body,
)
self.assertEqual(login_response.code, HTTPStatus.OK, login_response.result)
access_token = login_response.json_body["access_token"]
refresh_token = login_response.json_body["refresh_token"]
# Now that we have logged in, there should be one access token and one
# refresh token
self.assertEqual(_table_length("access_tokens"), 1)
self.assertEqual(_table_length("refresh_tokens"), 1)
for _ in range(5):
refresh_token, access_token = _refresh(refresh_token)
# After 5 sequential refreshes, there should only be the latest two
# refresh/access token pairs.
# (The last one is preserved because it's in use!
# The one before that is preserved because it can still be used to
# replace the last token pair, in case of e.g. a network interruption.)
self.assertEqual(_table_length("access_tokens"), 2)
self.assertEqual(_table_length("refresh_tokens"), 2)
logout_response = self.make_request(
"POST", "/_matrix/client/v3/logout", {}, access_token=access_token
)
self.assertEqual(logout_response.code, HTTPStatus.OK, logout_response.result)
# Now that we have logged in, there should be no access token
# and no refresh token
self.assertEqual(_table_length("access_tokens"), 0)
self.assertEqual(_table_length("refresh_tokens"), 0)
def oidc_config(
id: str, with_localpart_template: bool, **kwargs: Any
) -> Dict[str, Any]:
"""Sample OIDC provider config used in backchannel logout tests.
Args:
id: IDP ID for this provider
with_localpart_template: Set to `true` to have a default localpart_template in
the `user_mapping_provider` config and skip the user mapping session
**kwargs: rest of the config
Returns:
A dict suitable for the `oidc_config` or the `oidc_providers[]` parts of
the HS config
"""
config: Dict[str, Any] = {
"idp_id": id,
"idp_name": id,
"issuer": TEST_OIDC_ISSUER,
"client_id": "test-client-id",
"client_secret": "test-client-secret",
"scopes": ["openid"],
}
if with_localpart_template:
config["user_mapping_provider"] = {
"config": {"localpart_template": "{{ user.sub }}"}
}
else:
config["user_mapping_provider"] = {"config": {}}
config.update(kwargs)
return config
@skip_unless(HAS_OIDC, "Requires OIDC")
class OidcBackchannelLogoutTests(unittest.HomeserverTestCase):
servlets = [
account.register_servlets,
login.register_servlets,
]
def default_config(self) -> Dict[str, Any]:
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"
return config
def create_resource_dict(self) -> Dict[str, Resource]:
resource_dict = super().create_resource_dict()
resource_dict.update(build_synapse_client_resource_tree(self.hs))
return resource_dict
def submit_logout_token(self, logout_token: str) -> FakeChannel:
return self.make_request(
"POST",
"/_synapse/client/oidc/backchannel_logout",
content=f"logout_token={logout_token}",
content_is_form=True,
)
@override_config(
{
"oidc_providers": [
oidc_config(
id="oidc",
with_localpart_template=True,
backchannel_logout_enabled=True,
)
]
}
)
def test_simple_logout(self) -> None:
"""
Receiving a logout token should logout the user
"""
fake_oidc_server = self.helper.fake_oidc_server()
user = "john"
login_resp, first_grant = self.helper.login_via_oidc(
fake_oidc_server, user, with_sid=True
)
first_access_token: str = login_resp["access_token"]
self.helper.whoami(first_access_token, expect_code=HTTPStatus.OK)
login_resp, second_grant = self.helper.login_via_oidc(
fake_oidc_server, user, with_sid=True
)
second_access_token: str = login_resp["access_token"]
self.helper.whoami(second_access_token, expect_code=HTTPStatus.OK)
self.assertNotEqual(first_grant.sid, second_grant.sid)
self.assertEqual(first_grant.userinfo["sub"], second_grant.userinfo["sub"])
# Logging out of the first session
logout_token = fake_oidc_server.generate_logout_token(first_grant)
channel = self.submit_logout_token(logout_token)
self.assertEqual(channel.code, 200)
self.helper.whoami(first_access_token, expect_code=HTTPStatus.UNAUTHORIZED)
self.helper.whoami(second_access_token, expect_code=HTTPStatus.OK)
# Logging out of the second session
logout_token = fake_oidc_server.generate_logout_token(second_grant)
channel = self.submit_logout_token(logout_token)
self.assertEqual(channel.code, 200)
@override_config(
{
"oidc_providers": [
oidc_config(
id="oidc",
with_localpart_template=True,
backchannel_logout_enabled=True,
)
]
}
)
def test_logout_during_login(self) -> None:
"""
It should revoke login tokens when receiving a logout token
"""
fake_oidc_server = self.helper.fake_oidc_server()
user = "john"
# Get an authentication, and logout before submitting the logout token
client_redirect_url = "https://x"
userinfo = {"sub": user}
channel, grant = self.helper.auth_via_oidc(
fake_oidc_server,
userinfo,
client_redirect_url,
with_sid=True,
)
# expect a confirmation page
self.assertEqual(channel.code, HTTPStatus.OK, channel.result)
# fish the matrix login token out of the body of the confirmation page
m = re.search(
'a href="%s.*loginToken=([^"]*)"' % (client_redirect_url,),
channel.text_body,
)
assert m, channel.text_body
login_token = m.group(1)
# Submit a logout
logout_token = fake_oidc_server.generate_logout_token(grant)
channel = self.submit_logout_token(logout_token)
self.assertEqual(channel.code, 200)
# Now try to exchange the login token, it should fail.
self.helper.login_via_token(login_token, 403)
@override_config(
{
"oidc_providers": [
oidc_config(
id="oidc",
with_localpart_template=False,
backchannel_logout_enabled=True,
)
]
}
)
def test_logout_during_mapping(self) -> None:
"""
It should stop ongoing user mapping session when receiving a logout token
"""
fake_oidc_server = self.helper.fake_oidc_server()
user = "john"
# Get an authentication, and logout before submitting the logout token
client_redirect_url = "https://x"
userinfo = {"sub": user}
channel, grant = self.helper.auth_via_oidc(
fake_oidc_server,
userinfo,
client_redirect_url,
with_sid=True,
)
# Expect a user mapping page
self.assertEqual(channel.code, HTTPStatus.FOUND, channel.result)
# We should have a user_mapping_session cookie
cookie_headers = channel.headers.getRawHeaders("Set-Cookie")
assert cookie_headers
cookies: Dict[str, str] = {}
for h in cookie_headers:
key, value = h.split(";")[0].split("=", maxsplit=1)
cookies[key] = value
user_mapping_session_id = cookies["username_mapping_session"]
# Getting that session should not raise
session = self.hs.get_sso_handler().get_mapping_session(user_mapping_session_id)
self.assertIsNotNone(session)
# Submit a logout
logout_token = fake_oidc_server.generate_logout_token(grant)
channel = self.submit_logout_token(logout_token)
self.assertEqual(channel.code, 200)
# Now it should raise
with self.assertRaises(SynapseError):
self.hs.get_sso_handler().get_mapping_session(user_mapping_session_id)
@override_config(
{
"oidc_providers": [
oidc_config(
id="oidc",
with_localpart_template=True,
backchannel_logout_enabled=False,
)
]
}
)
def test_disabled(self) -> None:
"""
Receiving a logout token should do nothing if it is disabled in the config
"""
fake_oidc_server = self.helper.fake_oidc_server()
user = "john"
login_resp, grant = self.helper.login_via_oidc(
fake_oidc_server, user, with_sid=True
)
access_token: str = login_resp["access_token"]
self.helper.whoami(access_token, expect_code=HTTPStatus.OK)
# Logging out shouldn't work
logout_token = fake_oidc_server.generate_logout_token(grant)
channel = self.submit_logout_token(logout_token)
self.assertEqual(channel.code, 400)
# And the token should still be valid
self.helper.whoami(access_token, expect_code=HTTPStatus.OK)
@override_config(
{
"oidc_providers": [
oidc_config(
id="oidc",
with_localpart_template=True,
backchannel_logout_enabled=True,
)
]
}
)
def test_no_sid(self) -> None:
"""
Receiving a logout token without `sid` during the login should do nothing
"""
fake_oidc_server = self.helper.fake_oidc_server()
user = "john"
login_resp, grant = self.helper.login_via_oidc(
fake_oidc_server, user, with_sid=False
)
access_token: str = login_resp["access_token"]
self.helper.whoami(access_token, expect_code=HTTPStatus.OK)
# Logging out shouldn't work
logout_token = fake_oidc_server.generate_logout_token(grant)
channel = self.submit_logout_token(logout_token)
self.assertEqual(channel.code, 400)
# And the token should still be valid
self.helper.whoami(access_token, expect_code=HTTPStatus.OK)
@override_config(
{
"oidc_providers": [
oidc_config(
"first",
issuer="https://first-issuer.com/",
with_localpart_template=True,
backchannel_logout_enabled=True,
),
oidc_config(
"second",
issuer="https://second-issuer.com/",
with_localpart_template=True,
backchannel_logout_enabled=True,
),
]
}
)
def test_multiple_providers(self) -> None:
"""
It should be able to distinguish login tokens from two different IdPs
"""
first_server = self.helper.fake_oidc_server(issuer="https://first-issuer.com/")
second_server = self.helper.fake_oidc_server(
issuer="https://second-issuer.com/"
)
user = "john"
login_resp, first_grant = self.helper.login_via_oidc(
first_server, user, with_sid=True, idp_id="oidc-first"
)
first_access_token: str = login_resp["access_token"]
self.helper.whoami(first_access_token, expect_code=HTTPStatus.OK)
login_resp, second_grant = self.helper.login_via_oidc(
second_server, user, with_sid=True, idp_id="oidc-second"
)
second_access_token: str = login_resp["access_token"]
self.helper.whoami(second_access_token, expect_code=HTTPStatus.OK)
# `sid` in the fake providers are generated by a counter, so the first grant of
# each provider should give the same SID
self.assertEqual(first_grant.sid, second_grant.sid)
self.assertEqual(first_grant.userinfo["sub"], second_grant.userinfo["sub"])
# Logging out of the first session
logout_token = first_server.generate_logout_token(first_grant)
channel = self.submit_logout_token(logout_token)
self.assertEqual(channel.code, 200)
self.helper.whoami(first_access_token, expect_code=HTTPStatus.UNAUTHORIZED)
self.helper.whoami(second_access_token, expect_code=HTTPStatus.OK)
# Logging out of the second session
logout_token = second_server.generate_logout_token(second_grant)
channel = self.submit_logout_token(logout_token)
self.assertEqual(channel.code, 200)
self.helper.whoami(second_access_token, expect_code=HTTPStatus.UNAUTHORIZED)
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