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MSC2918 Refresh tokens implementation (#9450) 

This implements refresh tokens, as defined by MSC2918

This MSC has been implemented client side in Hydrogen Web: vector-im/hydrogen-web#235

The basics of the MSC works: requesting refresh tokens on login, having the access tokens expire, and using the refresh token to get a new one.

Signed-off-by: Quentin Gliech <quentingliech@gmail.com>
This commit is contained in:
Quentin Gliech 2021-06-24 15:33:20 +02:00 committed by GitHub
parent 763dba77ef
commit bd4919fb72
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15 changed files with 892 additions and 61 deletions
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1
changelog.d/9450.feature Normal file
View File

@ -0,0 +1 @@
Implement refresh tokens as specified by [MSC2918](https://github.com/matrix-org/matrix-doc/pull/2918).

4
scripts/synapse_port_db
View File

@ -93,6 +93,7 @@ BOOLEAN_COLUMNS = {
"local_media_repository": ["safe_from_quarantine"],
"users": ["shadow_banned"],
"e2e_fallback_keys_json": ["used"],
"access_tokens": ["used"],
}
@ -307,7 +308,8 @@ class Porter(object):
information_schema.table_constraints AS tc
INNER JOIN information_schema.constraint_column_usage AS ccu
USING (table_schema, constraint_name)
WHERE tc.constraint_type = 'FOREIGN KEY';
WHERE tc.constraint_type = 'FOREIGN KEY'
AND tc.table_name != ccu.table_name;
"""
txn.execute(sql)

5
synapse/api/auth.py
View File

@ -245,6 +245,11 @@ class Auth:
errcode=Codes.GUEST_ACCESS_FORBIDDEN,
)
# Mark the token as used. This is used to invalidate old refresh
# tokens after some time.
if not user_info.token_used and token_id is not None:
await self.store.mark_access_token_as_used(token_id)
requester = create_requester(
user_info.user_id,
token_id,

21
synapse/config/registration.py
View File

@ -119,6 +119,27 @@ class RegistrationConfig(Config):
session_lifetime = self.parse_duration(session_lifetime)
self.session_lifetime = session_lifetime
# The `access_token_lifetime` applies for tokens that can be renewed
# using a refresh token, as per MSC2918. If it is `None`, the refresh
# token mechanism is disabled.
#
# Since it is incompatible with the `session_lifetime` mechanism, it is set to
# `None` by default if a `session_lifetime` is set.
access_token_lifetime = config.get(
"access_token_lifetime", "5m" if session_lifetime is None else None
)
if access_token_lifetime is not None:
access_token_lifetime = self.parse_duration(access_token_lifetime)
self.access_token_lifetime = access_token_lifetime
if session_lifetime is not None and access_token_lifetime is not None:
raise ConfigError(
"The refresh token mechanism is incompatible with the "
"`session_lifetime` option. Consider disabling the "
"`session_lifetime` option or disabling the refresh token "
"mechanism by removing the `access_token_lifetime` option."
)
# The success template used during fallback auth.
self.fallback_success_template = self.read_template("auth_success.html")

132
synapse/handlers/auth.py
View File

@ -30,6 +30,7 @@ from typing import (
Optional,
Tuple,
Union,
cast,
)
import attr
@ -72,6 +73,7 @@ from synapse.util.stringutils import base62_encode
from synapse.util.threepids import canonicalise_email
if TYPE_CHECKING:
from synapse.rest.client.v1.login import LoginResponse
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
@ -777,6 +779,108 @@ class AuthHandler(BaseHandler):
"params": params,
}
async def refresh_token(
self,
refresh_token: str,
valid_until_ms: Optional[int],
) -> Tuple[str, str]:
"""
Consumes a refresh token and generate both a new access token and a new refresh token from it.
The consumed refresh token is considered invalid after the first use of the new access token or the new refresh token.
Args:
refresh_token: The token to consume.
valid_until_ms: The expiration timestamp of the new access token.
Returns:
A tuple containing the new access token and refresh token
"""
# Verify the token signature first before looking up the token
if not self._verify_refresh_token(refresh_token):
raise SynapseError(401, "invalid refresh token", Codes.UNKNOWN_TOKEN)
existing_token = await self.store.lookup_refresh_token(refresh_token)
if existing_token is None:
raise SynapseError(401, "refresh token does not exist", Codes.UNKNOWN_TOKEN)
if (
existing_token.has_next_access_token_been_used
or existing_token.has_next_refresh_token_been_refreshed
):
raise SynapseError(
403, "refresh token isn't valid anymore", Codes.FORBIDDEN
)
(
new_refresh_token,
new_refresh_token_id,
) = await self.get_refresh_token_for_user_id(
user_id=existing_token.user_id, device_id=existing_token.device_id
)
access_token = await self.get_access_token_for_user_id(
user_id=existing_token.user_id,
device_id=existing_token.device_id,
valid_until_ms=valid_until_ms,
refresh_token_id=new_refresh_token_id,
)
await self.store.replace_refresh_token(
existing_token.token_id, new_refresh_token_id
)
return access_token, new_refresh_token
def _verify_refresh_token(self, token: str) -> bool:
"""
Verifies the shape of a refresh token.
Args:
token: The refresh token to verify
Returns:
Whether the token has the right shape
"""
parts = token.split("_", maxsplit=4)
if len(parts) != 4:
return False
type, localpart, rand, crc = parts
# Refresh tokens are prefixed by "syr_", let's check that
if type != "syr":
return False
# Check the CRC
base = f"{type}_{localpart}_{rand}"
expected_crc = base62_encode(crc32(base.encode("ascii")), minwidth=6)
if crc != expected_crc:
return False
return True
async def get_refresh_token_for_user_id(
self,
user_id: str,
device_id: str,
) -> Tuple[str, int]:
"""
Creates a new refresh token for the user with the given user ID.
Args:
user_id: canonical user ID
device_id: the device ID to associate with the token.
Returns:
The newly created refresh token and its ID in the database
"""
refresh_token = self.generate_refresh_token(UserID.from_string(user_id))
refresh_token_id = await self.store.add_refresh_token_to_user(
user_id=user_id,
token=refresh_token,
device_id=device_id,
)
return refresh_token, refresh_token_id
async def get_access_token_for_user_id(
self,
user_id: str,
@ -784,6 +888,7 @@ class AuthHandler(BaseHandler):
valid_until_ms: Optional[int],
puppets_user_id: Optional[str] = None,
is_appservice_ghost: bool = False,
refresh_token_id: Optional[int] = None,
) -> str:
"""
Creates a new access token for the user with the given user ID.
@ -801,6 +906,8 @@ class AuthHandler(BaseHandler):
valid_until_ms: when the token is valid until. None for
no expiry.
is_appservice_ghost: Whether the user is an application ghost user
refresh_token_id: the refresh token ID that will be associated with
this access token.
Returns:
The access token for the user's session.
Raises:
@ -836,6 +943,7 @@ class AuthHandler(BaseHandler):
device_id=device_id,
valid_until_ms=valid_until_ms,
puppets_user_id=puppets_user_id,
refresh_token_id=refresh_token_id,
)
# the device *should* have been registered before we got here; however,
@ -928,7 +1036,7 @@ class AuthHandler(BaseHandler):
self,
login_submission: Dict[str, Any],
ratelimit: bool = False,
) -> Tuple[str, Optional[Callable[[Dict[str, str]], Awaitable[None]]]]:
) -> Tuple[str, Optional[Callable[["LoginResponse"], Awaitable[None]]]]:
"""Authenticates the user for the /login API
Also used by the user-interactive auth flow to validate auth types which don't
@ -1073,7 +1181,7 @@ class AuthHandler(BaseHandler):
self,
username: str,
login_submission: Dict[str, Any],
) -> Tuple[str, Optional[Callable[[Dict[str, str]], Awaitable[None]]]]:
) -> Tuple[str, Optional[Callable[["LoginResponse"], Awaitable[None]]]]:
"""Helper for validate_login
Handles login, once we've mapped 3pids onto userids
@ -1151,7 +1259,7 @@ class AuthHandler(BaseHandler):
async def check_password_provider_3pid(
self, medium: str, address: str, password: str
) -> Tuple[Optional[str], Optional[Callable[[Dict[str, str]], Awaitable[None]]]]:
) -> Tuple[Optional[str], Optional[Callable[["LoginResponse"], Awaitable[None]]]]:
"""Check if a password provider is able to validate a thirdparty login
Args:
@ -1215,6 +1323,19 @@ class AuthHandler(BaseHandler):
crc = base62_encode(crc32(base.encode("ascii")), minwidth=6)
return f"{base}_{crc}"
def generate_refresh_token(self, for_user: UserID) -> str:
"""Generates an opaque string, for use as a refresh token"""
# we use the following format for refresh tokens:
# syr_<base64 local part>_<random string>_<base62 crc check>
b64local = unpaddedbase64.encode_base64(for_user.localpart.encode("utf-8"))
random_string = stringutils.random_string(20)
base = f"syr_{b64local}_{random_string}"
crc = base62_encode(crc32(base.encode("ascii")), minwidth=6)
return f"{base}_{crc}"
async def validate_short_term_login_token(
self, login_token: str
) -> LoginTokenAttributes:
@ -1563,7 +1684,7 @@ class AuthHandler(BaseHandler):
)
respond_with_html(request, 200, html)
async def _sso_login_callback(self, login_result: JsonDict) -> None:
async def _sso_login_callback(self, login_result: "LoginResponse") -> None:
"""
A login callback which might add additional attributes to the login response.
@ -1577,7 +1698,8 @@ class AuthHandler(BaseHandler):
extra_attributes = self._extra_attributes.get(login_result["user_id"])
if extra_attributes:
login_result.update(extra_attributes.extra_attributes)
login_result_dict = cast(Dict[str, Any], login_result)
login_result_dict.update(extra_attributes.extra_attributes)
def _expire_sso_extra_attributes(self) -> None:
"""

52
synapse/handlers/register.py
View File

@ -15,9 +15,10 @@
"""Contains functions for registering clients."""
import logging
from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Tuple
from typing import TYPE_CHECKING, Iterable, List, Optional, Tuple
from prometheus_client import Counter
from typing_extensions import TypedDict
from synapse import types
from synapse.api.constants import MAX_USERID_LENGTH, EventTypes, JoinRules, LoginType
@ -54,6 +55,16 @@ login_counter = Counter(
["guest", "auth_provider"],
)
LoginDict = TypedDict(
"LoginDict",
{
"device_id": str,
"access_token": str,
"valid_until_ms": Optional[int],
"refresh_token": Optional[str],
},
)
class RegistrationHandler(BaseHandler):
def __init__(self, hs: "HomeServer"):
@ -85,6 +96,7 @@ class RegistrationHandler(BaseHandler):
self.pusher_pool = hs.get_pusherpool()
self.session_lifetime = hs.config.session_lifetime
self.access_token_lifetime = hs.config.access_token_lifetime
async def check_username(
self,
@ -696,7 +708,8 @@ class RegistrationHandler(BaseHandler):
is_guest: bool = False,
is_appservice_ghost: bool = False,
auth_provider_id: Optional[str] = None,
) -> Tuple[str, str]:
should_issue_refresh_token: bool = False,
) -> Tuple[str, str, Optional[int], Optional[str]]:
"""Register a device for a user and generate an access token.
The access token will be limited by the homeserver's session_lifetime config.
@ -708,8 +721,9 @@ class RegistrationHandler(BaseHandler):
is_guest: Whether this is a guest account
auth_provider_id: The SSO IdP the user used, if any (just used for the
prometheus metrics).
should_issue_refresh_token: Whether it should also issue a refresh token
Returns:
Tuple of device ID and access token
Tuple of device ID, access token, access token expiration time and refresh token
"""
res = await self._register_device_client(
user_id=user_id,
@ -717,6 +731,7 @@ class RegistrationHandler(BaseHandler):
initial_display_name=initial_display_name,
is_guest=is_guest,
is_appservice_ghost=is_appservice_ghost,
should_issue_refresh_token=should_issue_refresh_token,
)
login_counter.labels(
@ -724,7 +739,12 @@ class RegistrationHandler(BaseHandler):
auth_provider=(auth_provider_id or ""),
).inc()
return res["device_id"], res["access_token"]
return (
res["device_id"],
res["access_token"],
res["valid_until_ms"],
res["refresh_token"],
)
async def register_device_inner(
self,
@ -733,7 +753,8 @@ class RegistrationHandler(BaseHandler):
initial_display_name: Optional[str],
is_guest: bool = False,
is_appservice_ghost: bool = False,
) -> Dict[str, str]:
should_issue_refresh_token: bool = False,
) -> LoginDict:
"""Helper for register_device
Does the bits that need doing on the main process. Not for use outside this
@ -748,6 +769,9 @@ class RegistrationHandler(BaseHandler):
)
valid_until_ms = self.clock.time_msec() + self.session_lifetime
refresh_token = None
refresh_token_id = None
registered_device_id = await self.device_handler.check_device_registered(
user_id, device_id, initial_display_name
)
@ -755,14 +779,30 @@ class RegistrationHandler(BaseHandler):
assert valid_until_ms is None
access_token = self.macaroon_gen.generate_guest_access_token(user_id)
else:
if should_issue_refresh_token:
(
refresh_token,
refresh_token_id,
) = await self._auth_handler.get_refresh_token_for_user_id(
user_id,
device_id=registered_device_id,
)
valid_until_ms = self.clock.time_msec() + self.access_token_lifetime
access_token = await self._auth_handler.get_access_token_for_user_id(
user_id,
device_id=registered_device_id,
valid_until_ms=valid_until_ms,
is_appservice_ghost=is_appservice_ghost,
refresh_token_id=refresh_token_id,
)
return {"device_id": registered_device_id, "access_token": access_token}
return {
"device_id": registered_device_id,
"access_token": access_token,
"valid_until_ms": valid_until_ms,
"refresh_token": refresh_token,
}
async def post_registration_actions(
self, user_id: str, auth_result: dict, access_token: Optional[str]

2
synapse/module_api/__init__.py
View File

@ -168,7 +168,7 @@ class ModuleApi:
"Using deprecated ModuleApi.register which creates a dummy user device."
)
user_id = yield self.register_user(localpart, displayname, emails or [])
_, access_token = yield self.register_device(user_id)
_, access_token, _, _ = yield self.register_device(user_id)
return user_id, access_token
def register_user(

13
synapse/replication/http/login.py
View File

@ -36,20 +36,29 @@ class RegisterDeviceReplicationServlet(ReplicationEndpoint):
@staticmethod
async def _serialize_payload(
user_id, device_id, initial_display_name, is_guest, is_appservice_ghost
user_id,
device_id,
initial_display_name,
is_guest,
is_appservice_ghost,
should_issue_refresh_token,
):
"""
Args:
user_id (int)
device_id (str|None): Device ID to use, if None a new one is
generated.
initial_display_name (str|None)
is_guest (bool)
is_appservice_ghost (bool)
should_issue_refresh_token (bool)
"""
return {
"device_id": device_id,
"initial_display_name": initial_display_name,
"is_guest": is_guest,
"is_appservice_ghost": is_appservice_ghost,
"should_issue_refresh_token": should_issue_refresh_token,
}
async def _handle_request(self, request, user_id):
@ -59,6 +68,7 @@ class RegisterDeviceReplicationServlet(ReplicationEndpoint):
initial_display_name = content["initial_display_name"]
is_guest = content["is_guest"]
is_appservice_ghost = content["is_appservice_ghost"]
should_issue_refresh_token = content["should_issue_refresh_token"]
res = await self.registration_handler.register_device_inner(
user_id,
@ -66,6 +76,7 @@ class RegisterDeviceReplicationServlet(ReplicationEndpoint):
initial_display_name,
is_guest,
is_appservice_ghost=is_appservice_ghost,
should_issue_refresh_token=should_issue_refresh_token,
)
return 200, res

169
synapse/rest/client/v1/login.py
View File

@ -14,7 +14,9 @@
import logging
import re
from typing import TYPE_CHECKING, Awaitable, Callable, Dict, List, Optional
from typing import TYPE_CHECKING, Any, Awaitable, Callable, Dict, List, Optional
from typing_extensions import TypedDict
from synapse.api.errors import Codes, LoginError, SynapseError
from synapse.api.ratelimiting import Ratelimiter
@ -25,6 +27,8 @@ from synapse.http import get_request_uri
from synapse.http.server import HttpServer, finish_request
from synapse.http.servlet import (
RestServlet,
assert_params_in_dict,
parse_boolean,
parse_bytes_from_args,
parse_json_object_from_request,
parse_string,
@ -40,6 +44,21 @@ if TYPE_CHECKING:
logger = logging.getLogger(__name__)
LoginResponse = TypedDict(
"LoginResponse",
{
"user_id": str,
"access_token": str,
"home_server": str,
"expires_in_ms": Optional[int],
"refresh_token": Optional[str],
"device_id": str,
"well_known": Optional[Dict[str, Any]],
},
total=False,
)
class LoginRestServlet(RestServlet):
PATTERNS = client_patterns("/login$", v1=True)
CAS_TYPE = "m.login.cas"
@ -48,6 +67,7 @@ class LoginRestServlet(RestServlet):
JWT_TYPE = "org.matrix.login.jwt"
JWT_TYPE_DEPRECATED = "m.login.jwt"
APPSERVICE_TYPE = "uk.half-shot.msc2778.login.application_service"
REFRESH_TOKEN_PARAM = "org.matrix.msc2918.refresh_token"
def __init__(self, hs: "HomeServer"):
super().__init__()
@ -65,9 +85,12 @@ class LoginRestServlet(RestServlet):
self.cas_enabled = hs.config.cas_enabled
self.oidc_enabled = hs.config.oidc_enabled
self._msc2858_enabled = hs.config.experimental.msc2858_enabled
self._msc2918_enabled = hs.config.access_token_lifetime is not None
self.auth = hs.get_auth()
self.clock = hs.get_clock()
self.auth_handler = self.hs.get_auth_handler()
self.registration_handler = hs.get_registration_handler()
self._sso_handler = hs.get_sso_handler()
@ -138,6 +161,15 @@ class LoginRestServlet(RestServlet):
async def on_POST(self, request: SynapseRequest):
login_submission = parse_json_object_from_request(request)
if self._msc2918_enabled:
# Check if this login should also issue a refresh token, as per
# MSC2918
should_issue_refresh_token = parse_boolean(
request, name=LoginRestServlet.REFRESH_TOKEN_PARAM, default=False
)
else:
should_issue_refresh_token = False
try:
if login_submission["type"] == LoginRestServlet.APPSERVICE_TYPE:
appservice = self.auth.get_appservice_by_req(request)
@ -147,19 +179,32 @@ class LoginRestServlet(RestServlet):
None, request.getClientIP()
)
result = await self._do_appservice_login(login_submission, appservice)
result = await self._do_appservice_login(
login_submission,
appservice,
should_issue_refresh_token=should_issue_refresh_token,
)
elif self.jwt_enabled and (
login_submission["type"] == LoginRestServlet.JWT_TYPE
or login_submission["type"] == LoginRestServlet.JWT_TYPE_DEPRECATED
):
await self._address_ratelimiter.ratelimit(None, request.getClientIP())
result = await self._do_jwt_login(login_submission)
result = await self._do_jwt_login(
login_submission,
should_issue_refresh_token=should_issue_refresh_token,
)
elif login_submission["type"] == LoginRestServlet.TOKEN_TYPE:
await self._address_ratelimiter.ratelimit(None, request.getClientIP())
result = await self._do_token_login(login_submission)
result = await self._do_token_login(
login_submission,
should_issue_refresh_token=should_issue_refresh_token,
)
else:
await self._address_ratelimiter.ratelimit(None, request.getClientIP())
result = await self._do_other_login(login_submission)
result = await self._do_other_login(
login_submission,
should_issue_refresh_token=should_issue_refresh_token,
)
except KeyError:
raise SynapseError(400, "Missing JSON keys.")
@ -169,7 +214,10 @@ class LoginRestServlet(RestServlet):
return 200, result
async def _do_appservice_login(
self, login_submission: JsonDict, appservice: ApplicationService
self,
login_submission: JsonDict,
appservice: ApplicationService,
should_issue_refresh_token: bool = False,
):
identifier = login_submission.get("identifier")
logger.info("Got appservice login request with identifier: %r", identifier)
@ -198,14 +246,21 @@ class LoginRestServlet(RestServlet):
raise LoginError(403, "Invalid access_token", errcode=Codes.FORBIDDEN)
return await self._complete_login(
qualified_user_id, login_submission, ratelimit=appservice.is_rate_limited()
qualified_user_id,
login_submission,
ratelimit=appservice.is_rate_limited(),
should_issue_refresh_token=should_issue_refresh_token,
)
async def _do_other_login(self, login_submission: JsonDict) -> Dict[str, str]:
async def _do_other_login(
self, login_submission: JsonDict, should_issue_refresh_token: bool = False
) -> LoginResponse:
"""Handle non-token/saml/jwt logins
Args:
login_submission:
should_issue_refresh_token: True if this login should issue
a refresh token alongside the access token.
Returns:
HTTP response
@ -224,7 +279,10 @@ class LoginRestServlet(RestServlet):
login_submission, ratelimit=True
)
result = await self._complete_login(
canonical_user_id, login_submission, callback
canonical_user_id,
login_submission,
callback,
should_issue_refresh_token=should_issue_refresh_token,
)
return result
@ -232,11 +290,12 @@ class LoginRestServlet(RestServlet):
self,
user_id: str,
login_submission: JsonDict,
callback: Optional[Callable[[Dict[str, str]], Awaitable[None]]] = None,
callback: Optional[Callable[[LoginResponse], Awaitable[None]]] = None,
create_non_existent_users: bool = False,
ratelimit: bool = True,
auth_provider_id: Optional[str] = None,
) -> Dict[str, str]:
should_issue_refresh_token: bool = False,
) -> LoginResponse:
"""Called when we've successfully authed the user and now need to
actually login them in (e.g. create devices). This gets called on
all successful logins.
@ -253,6 +312,8 @@ class LoginRestServlet(RestServlet):
ratelimit: Whether to ratelimit the login request.
auth_provider_id: The SSO IdP the user used, if any (just used for the
prometheus metrics).
should_issue_refresh_token: True if this login should issue
a refresh token alongside the access token.
Returns:
result: Dictionary of account information after successful login.
@ -274,28 +335,48 @@ class LoginRestServlet(RestServlet):
device_id = login_submission.get("device_id")
initial_display_name = login_submission.get("initial_device_display_name")
device_id, access_token = await self.registration_handler.register_device(
user_id, device_id, initial_display_name, auth_provider_id=auth_provider_id
(
device_id,
access_token,
valid_until_ms,
refresh_token,
) = await self.registration_handler.register_device(
user_id,
device_id,
initial_display_name,
auth_provider_id=auth_provider_id,
should_issue_refresh_token=should_issue_refresh_token,
)
result = {
"user_id": user_id,
"access_token": access_token,
"home_server": self.hs.hostname,
"device_id": device_id,
}
result = LoginResponse(
user_id=user_id,
access_token=access_token,
home_server=self.hs.hostname,
device_id=device_id,
)
if valid_until_ms is not None:
expires_in_ms = valid_until_ms - self.clock.time_msec()
result["expires_in_ms"] = expires_in_ms
if refresh_token is not None:
result["refresh_token"] = refresh_token
if callback is not None:
await callback(result)
return result
async def _do_token_login(self, login_submission: JsonDict) -> Dict[str, str]:
async def _do_token_login(
self, login_submission: JsonDict, should_issue_refresh_token: bool = False
) -> LoginResponse:
"""
Handle the final stage of SSO login.
Args:
login_submission: The JSON request body.
should_issue_refresh_token: True if this login should issue
a refresh token alongside the access token.
Returns:
The body of the JSON response.
@ -309,9 +390,12 @@ class LoginRestServlet(RestServlet):
login_submission,
self.auth_handler._sso_login_callback,
auth_provider_id=res.auth_provider_id,
should_issue_refresh_token=should_issue_refresh_token,
)
async def _do_jwt_login(self, login_submission: JsonDict) -> Dict[str, str]:
async def _do_jwt_login(
self, login_submission: JsonDict, should_issue_refresh_token: bool = False
) -> LoginResponse:
token = login_submission.get("token", None)
if token is None:
raise LoginError(
@ -342,7 +426,10 @@ class LoginRestServlet(RestServlet):
user_id = UserID(user, self.hs.hostname).to_string()
result = await self._complete_login(
user_id, login_submission, create_non_existent_users=True
user_id,
login_submission,
create_non_existent_users=True,
should_issue_refresh_token=should_issue_refresh_token,
)
return result
@ -371,6 +458,42 @@ def _get_auth_flow_dict_for_idp(
return e
class RefreshTokenServlet(RestServlet):
PATTERNS = client_patterns(
"/org.matrix.msc2918.refresh_token/refresh$", releases=(), unstable=True
)
def __init__(self, hs: "HomeServer"):
self._auth_handler = hs.get_auth_handler()
self._clock = hs.get_clock()
self.access_token_lifetime = hs.config.access_token_lifetime
async def on_POST(
self,
request: SynapseRequest,
):
refresh_submission = parse_json_object_from_request(request)
assert_params_in_dict(refresh_submission, ["refresh_token"])
token = refresh_submission["refresh_token"]
if not isinstance(token, str):
raise SynapseError(400, "Invalid param: refresh_token", Codes.INVALID_PARAM)
valid_until_ms = self._clock.time_msec() + self.access_token_lifetime
access_token, refresh_token = await self._auth_handler.refresh_token(
token, valid_until_ms
)
expires_in_ms = valid_until_ms - self._clock.time_msec()
return (
200,
{
"access_token": access_token,
"refresh_token": refresh_token,
"expires_in_ms": expires_in_ms,
},
)
class SsoRedirectServlet(RestServlet):
PATTERNS = list(client_patterns("/login/(cas|sso)/redirect$", v1=True)) + [
re.compile(
@ -477,6 +600,8 @@ class CasTicketServlet(RestServlet):
def register_servlets(hs, http_server):
LoginRestServlet(hs).register(http_server)
if hs.config.access_token_lifetime is not None:
RefreshTokenServlet(hs).register(http_server)
SsoRedirectServlet(hs).register(http_server)
if hs.config.cas_enabled:
CasTicketServlet(hs).register(http_server)

80
synapse/rest/client/v2_alpha/register.py
View File

@ -41,11 +41,13 @@ from synapse.http.server import finish_request, respond_with_html
from synapse.http.servlet import (
RestServlet,
assert_params_in_dict,
parse_boolean,
parse_json_object_from_request,
parse_string,
)
from synapse.metrics import threepid_send_requests
from synapse.push.mailer import Mailer
from synapse.types import JsonDict
from synapse.util.msisdn import phone_number_to_msisdn
from synapse.util.ratelimitutils import FederationRateLimiter
from synapse.util.stringutils import assert_valid_client_secret, random_string
@ -399,6 +401,7 @@ class RegisterRestServlet(RestServlet):
self.password_policy_handler = hs.get_password_policy_handler()
self.clock = hs.get_clock()
self._registration_enabled = self.hs.config.enable_registration
self._msc2918_enabled = hs.config.access_token_lifetime is not None
self._registration_flows = _calculate_registration_flows(
hs.config, self.auth_handler
@ -424,6 +427,15 @@ class RegisterRestServlet(RestServlet):
"Do not understand membership kind: %s" % (kind.decode("utf8"),)
)
if self._msc2918_enabled:
# Check if this registration should also issue a refresh token, as
# per MSC2918
should_issue_refresh_token = parse_boolean(
request, name="org.matrix.msc2918.refresh_token", default=False
)
else:
should_issue_refresh_token = False
# Pull out the provided username and do basic sanity checks early since
# the auth layer will store these in sessions.
desired_username = None
@ -462,7 +474,10 @@ class RegisterRestServlet(RestServlet):
raise SynapseError(400, "Desired Username is missing or not a string")
result = await self._do_appservice_registration(
desired_username, access_token, body
desired_username,
access_token,
body,
should_issue_refresh_token=should_issue_refresh_token,
)
return 200, result
@ -665,7 +680,9 @@ class RegisterRestServlet(RestServlet):
registered = True
return_dict = await self._create_registration_details(
registered_user_id, params
registered_user_id,
params,
should_issue_refresh_token=should_issue_refresh_token,
)
if registered:
@ -677,7 +694,9 @@ class RegisterRestServlet(RestServlet):
return 200, return_dict
async def _do_appservice_registration(self, username, as_token, body):
async def _do_appservice_registration(
self, username, as_token, body, should_issue_refresh_token: bool = False
):
user_id = await self.registration_handler.appservice_register(
username, as_token
)
@ -685,19 +704,27 @@ class RegisterRestServlet(RestServlet):
user_id,
body,
is_appservice_ghost=True,
should_issue_refresh_token=should_issue_refresh_token,
)
async def _create_registration_details(
self, user_id, params, is_appservice_ghost=False
self,
user_id: str,
params: JsonDict,
is_appservice_ghost: bool = False,
should_issue_refresh_token: bool = False,
):
"""Complete registration of newly-registered user
Allocates device_id if one was not given; also creates access_token.
Args:
(str) user_id: full canonical @user:id
(object) params: registration parameters, from which we pull
device_id, initial_device_name and inhibit_login
user_id: full canonical @user:id
params: registration parameters, from which we pull device_id,
initial_device_name and inhibit_login
is_appservice_ghost
should_issue_refresh_token: True if this registration should issue
a refresh token alongside the access token.
Returns:
dictionary for response from /register
"""
@ -705,15 +732,29 @@ class RegisterRestServlet(RestServlet):
if not params.get("inhibit_login", False):
device_id = params.get("device_id")
initial_display_name = params.get("initial_device_display_name")
device_id, access_token = await self.registration_handler.register_device(
(
device_id,
access_token,
valid_until_ms,
refresh_token,
) = await self.registration_handler.register_device(
user_id,
device_id,
initial_display_name,
is_guest=False,
is_appservice_ghost=is_appservice_ghost,
should_issue_refresh_token=should_issue_refresh_token,
)
result.update({"access_token": access_token, "device_id": device_id})
if valid_until_ms is not None:
expires_in_ms = valid_until_ms - self.clock.time_msec()
result["expires_in_ms"] = expires_in_ms
if refresh_token is not None:
result["refresh_token"] = refresh_token
return result
async def _do_guest_registration(self, params, address=None):
@ -727,19 +768,30 @@ class RegisterRestServlet(RestServlet):
# we have nowhere to store it.
device_id = synapse.api.auth.GUEST_DEVICE_ID
initial_display_name = params.get("initial_device_display_name")
device_id, access_token = await self.registration_handler.register_device(
(
device_id,
access_token,
valid_until_ms,
refresh_token,
) = await self.registration_handler.register_device(
user_id, device_id, initial_display_name, is_guest=True
)
return (
200,
{
result = {
"user_id": user_id,
"device_id": device_id,
"access_token": access_token,
"home_server": self.hs.hostname,
},
)
}
if valid_until_ms is not None:
expires_in_ms = valid_until_ms - self.clock.time_msec()
result["expires_in_ms"] = expires_in_ms
if refresh_token is not None:
result["refresh_token"] = refresh_token
return 200, result
def _calculate_registration_flows(

207
synapse/storage/databases/main/registration.py
View File

@ -53,6 +53,9 @@ class TokenLookupResult:
valid_until_ms: The timestamp the token expires, if any.
token_owner: The "owner" of the token. This is either the same as the
user, or a server admin who is logged in as the user.
token_used: True if this token was used at least once in a request.
This field can be out of date since `get_user_by_access_token` is
cached.
"""
user_id = attr.ib(type=str)
@ -62,6 +65,7 @@ class TokenLookupResult:
device_id = attr.ib(type=Optional[str], default=None)
valid_until_ms = attr.ib(type=Optional[int], default=None)
token_owner = attr.ib(type=str)
token_used = attr.ib(type=bool, default=False)
# Make the token owner default to the user ID, which is the common case.
@token_owner.default
@ -69,6 +73,29 @@ class TokenLookupResult:
return self.user_id
@attr.s(frozen=True, slots=True)
class RefreshTokenLookupResult:
"""Result of looking up a refresh token."""
user_id = attr.ib(type=str)
"""The user this token belongs to."""
device_id = attr.ib(type=str)
"""The device associated with this refresh token."""
token_id = attr.ib(type=int)
"""The ID of this refresh token."""
next_token_id = attr.ib(type=Optional[int])
"""The ID of the refresh token which replaced this one."""
has_next_refresh_token_been_refreshed = attr.ib(type=bool)
"""True if the next refresh token was used for another refresh."""
has_next_access_token_been_used = attr.ib(type=bool)
"""True if the next access token was already used at least once."""
class RegistrationWorkerStore(CacheInvalidationWorkerStore):
def __init__(
self,
@ -441,7 +468,8 @@ class RegistrationWorkerStore(CacheInvalidationWorkerStore):
access_tokens.id as token_id,
access_tokens.device_id,
access_tokens.valid_until_ms,
access_tokens.user_id as token_owner
access_tokens.user_id as token_owner,
access_tokens.used as token_used
FROM users
INNER JOIN access_tokens on users.name = COALESCE(puppets_user_id, access_tokens.user_id)
WHERE token = ?
@ -449,8 +477,15 @@ class RegistrationWorkerStore(CacheInvalidationWorkerStore):
txn.execute(sql, (token,))
rows = self.db_pool.cursor_to_dict(txn)
if rows:
return TokenLookupResult(**rows[0])
row = rows[0]
# This field is nullable, ensure it comes out as a boolean
if row["token_used"] is None:
row["token_used"] = False
return TokenLookupResult(**row)
return None
@ -1072,6 +1107,111 @@ class RegistrationWorkerStore(CacheInvalidationWorkerStore):
desc="update_access_token_last_validated",
)
@cached()
async def mark_access_token_as_used(self, token_id: int) -> None:
"""
Mark the access token as used, which invalidates the refresh token used
to obtain it.
Because get_user_by_access_token is cached, this function might be
called multiple times for the same token, effectively doing unnecessary
SQL updates. Because updating the `used` field only goes one way (from
False to True) it is safe to cache this function as well to avoid this
issue.
Args:
token_id: The ID of the access token to update.
Raises:
StoreError if there was a problem updating this.
"""
await self.db_pool.simple_update_one(
"access_tokens",
{"id": token_id},
{"used": True},
desc="mark_access_token_as_used",
)
async def lookup_refresh_token(
self, token: str
) -> Optional[RefreshTokenLookupResult]:
"""Lookup a refresh token with hints about its validity."""
def _lookup_refresh_token_txn(txn) -> Optional[RefreshTokenLookupResult]:
txn.execute(
"""
SELECT
rt.id token_id,
rt.user_id,
rt.device_id,
rt.next_token_id,
(nrt.next_token_id IS NOT NULL) has_next_refresh_token_been_refreshed,
at.used has_next_access_token_been_used
FROM refresh_tokens rt
LEFT JOIN refresh_tokens nrt ON rt.next_token_id = nrt.id
LEFT JOIN access_tokens at ON at.refresh_token_id = nrt.id
WHERE rt.token = ?
""",
(token,),
)
row = txn.fetchone()
if row is None:
return None
return RefreshTokenLookupResult(
token_id=row[0],
user_id=row[1],
device_id=row[2],
next_token_id=row[3],
has_next_refresh_token_been_refreshed=row[4],
# This column is nullable, ensure it's a boolean
has_next_access_token_been_used=(row[5] or False),
)
return await self.db_pool.runInteraction(
"lookup_refresh_token", _lookup_refresh_token_txn
)
async def replace_refresh_token(self, token_id: int, next_token_id: int) -> None:
"""
Set the successor of a refresh token, removing the existing successor
if any.
Args:
token_id: ID of the refresh token to update.
next_token_id: ID of its successor.
"""
def _replace_refresh_token_txn(txn) -> None:
# First check if there was an existing refresh token
old_next_token_id = self.db_pool.simple_select_one_onecol_txn(
txn,
"refresh_tokens",
{"id": token_id},
"next_token_id",
allow_none=True,
)
self.db_pool.simple_update_one_txn(
txn,
"refresh_tokens",
{"id": token_id},
{"next_token_id": next_token_id},
)
# Delete the old "next" token if it exists. This should cascade and
# delete the associated access_token
if old_next_token_id is not None:
self.db_pool.simple_delete_one_txn(
txn,
"refresh_tokens",
{"id": old_next_token_id},
)
await self.db_pool.runInteraction(
"replace_refresh_token", _replace_refresh_token_txn
)
class RegistrationBackgroundUpdateStore(RegistrationWorkerStore):
def __init__(
@ -1263,6 +1403,7 @@ class RegistrationStore(StatsStore, RegistrationBackgroundUpdateStore):
self._ignore_unknown_session_error = hs.config.request_token_inhibit_3pid_errors
self._access_tokens_id_gen = IdGenerator(db_conn, "access_tokens", "id")
self._refresh_tokens_id_gen = IdGenerator(db_conn, "refresh_tokens", "id")
async def add_access_token_to_user(
self,
@ -1271,14 +1412,18 @@ class RegistrationStore(StatsStore, RegistrationBackgroundUpdateStore):
device_id: Optional[str],
valid_until_ms: Optional[int],
puppets_user_id: Optional[str] = None,
refresh_token_id: Optional[int] = None,
) -> int:
"""Adds an access token for the given user.
Args:
user_id: The user ID.
token: The new access token to add.
device_id: ID of the device to associate with the access token
device_id: ID of the device to associate with the access token.
valid_until_ms: when the token is valid until. None for no expiry.
puppets_user_id
refresh_token_id: ID of the refresh token generated alongside this
access token.
Raises:
StoreError if there was a problem adding this.
Returns:
@ -1297,12 +1442,47 @@ class RegistrationStore(StatsStore, RegistrationBackgroundUpdateStore):
"valid_until_ms": valid_until_ms,
"puppets_user_id": puppets_user_id,
"last_validated": now,
"refresh_token_id": refresh_token_id,
"used": False,
},
desc="add_access_token_to_user",
)
return next_id
async def add_refresh_token_to_user(
self,
user_id: str,
token: str,
device_id: Optional[str],
) -> int:
"""Adds a refresh token for the given user.
Args:
user_id: The user ID.
token: The new access token to add.
device_id: ID of the device to associate with the refresh token.
Raises:
StoreError if there was a problem adding this.
Returns:
The token ID
"""
next_id = self._refresh_tokens_id_gen.get_next()
await self.db_pool.simple_insert(
"refresh_tokens",
{
"id": next_id,
"user_id": user_id,
"device_id": device_id,
"token": token,
"next_token_id": None,
},
desc="add_refresh_token_to_user",
)
return next_id
def _set_device_for_access_token_txn(self, txn, token: str, device_id: str) -> str:
old_device_id = self.db_pool.simple_select_one_onecol_txn(
txn, "access_tokens", {"token": token}, "device_id"
@ -1545,7 +1725,7 @@ class RegistrationStore(StatsStore, RegistrationBackgroundUpdateStore):
device_id: Optional[str] = None,
) -> List[Tuple[str, int, Optional[str]]]:
"""
Invalidate access tokens belonging to a user
Invalidate access and refresh tokens belonging to a user
Args:
user_id: ID of user the tokens belong to
@ -1565,7 +1745,13 @@ class RegistrationStore(StatsStore, RegistrationBackgroundUpdateStore):
items = keyvalues.items()
where_clause = " AND ".join(k + " = ?" for k, _ in items)
values = [v for _, v in items] # type: List[Union[str, int]]
# Conveniently, refresh_tokens and access_tokens both use the user_id and device_id fields. Only caveat
# is the `except_token_id` param that is tricky to get right, so for now we're just using the same where
# clause and values before we handle that. This seems to be only used in the "set password" handler.
refresh_where_clause = where_clause
refresh_values = values.copy()
if except_token_id:
# TODO: support that for refresh tokens
where_clause += " AND id != ?"
values.append(except_token_id)
@ -1583,6 +1769,11 @@ class RegistrationStore(StatsStore, RegistrationBackgroundUpdateStore):
txn.execute("DELETE FROM access_tokens WHERE %s" % where_clause, values)
txn.execute(
"DELETE FROM refresh_tokens WHERE %s" % refresh_where_clause,
refresh_values,
)
return tokens_and_devices
return await self.db_pool.runInteraction("user_delete_access_tokens", f)
@ -1599,6 +1790,14 @@ class RegistrationStore(StatsStore, RegistrationBackgroundUpdateStore):
await self.db_pool.runInteraction("delete_access_token", f)
async def delete_refresh_token(self, refresh_token: str) -> None:
def f(txn):
self.db_pool.simple_delete_one_txn(
txn, table="refresh_tokens", keyvalues={"token": refresh_token}
)
await self.db_pool.runInteraction("delete_refresh_token", f)
async def add_user_pending_deactivation(self, user_id: str) -> None:
"""
Adds a user to the table of users who need to be parted from all the rooms they're

34
synapse/storage/schema/main/delta/59/14refresh_tokens.sql Normal file
View File

@ -0,0 +1,34 @@
/* Copyright 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.
*/
-- Holds MSC2918 refresh tokens
CREATE TABLE refresh_tokens (
id BIGINT PRIMARY KEY,
user_id TEXT NOT NULL,
device_id TEXT NOT NULL,
token TEXT NOT NULL,
-- When consumed, a new refresh token is generated, which is tracked by
-- this foreign key
next_token_id BIGINT REFERENCES refresh_tokens (id) ON DELETE CASCADE,
UNIQUE(token)
);
-- Add a reference to the refresh token generated alongside each access token
ALTER TABLE "access_tokens"
ADD COLUMN refresh_token_id BIGINT REFERENCES refresh_tokens (id) ON DELETE CASCADE;
-- Add a flag whether the token was already used or not
ALTER TABLE "access_tokens"
ADD COLUMN used BOOLEAN;

1
tests/api/test_auth.py
View File

@ -58,6 +58,7 @@ class AuthTestCase(unittest.HomeserverTestCase):
user_id=self.test_user, token_id=5, device_id="device"
)
self.store.get_user_by_access_token = simple_async_mock(user_info)
self.store.mark_access_token_as_used = simple_async_mock(None)
request = Mock(args={})
request.args[b"access_token"] = [self.test_token]

2
tests/handlers/test_device.py
View File

@ -257,7 +257,7 @@ class DehydrationTestCase(unittest.HomeserverTestCase):
self.assertEqual(device_data, {"device_data": {"foo": "bar"}})
# Create a new login for the user and dehydrated the device
device_id, access_token = self.get_success(
device_id, access_token, _expiration_time, _refresh_token = self.get_success(
self.registration.register_device(
user_id=user_id,
device_id=None,

220
tests/rest/client/v2_alpha/test_auth.py
View File

@ -20,7 +20,7 @@ import synapse.rest.admin
from synapse.api.constants import LoginType
from synapse.handlers.ui_auth.checkers import UserInteractiveAuthChecker
from synapse.rest.client.v1 import login
from synapse.rest.client.v2_alpha import auth, devices, register
from synapse.rest.client.v2_alpha import account, auth, devices, register
from synapse.rest.synapse.client import build_synapse_client_resource_tree
from synapse.types import JsonDict, UserID
@ -498,3 +498,221 @@ class UIAuthTests(unittest.HomeserverTestCase):
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 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?org.matrix.msc2918.refresh_token=true",
{
"username": "test3",
"password": self.user_pass,
"auth": {"type": LoginType.DUMMY},
},
)
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}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login?org.matrix.msc2918.refresh_token=true",
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({"access_token_lifetime": "1m"})
def test_refresh_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}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login?org.matrix.msc2918.refresh_token=true",
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
)
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}
login_response = self.make_request(
"POST",
"/_matrix/client/r0/login?org.matrix.msc2918.refresh_token=true",
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
)