Stabilise support for MSC2918 refresh tokens as they have now been merged into the Matrix specification. (#11435)

synapse/config/registration.py

@@ -220,6 +220,44 @@ class RegistrationConfig(Config):
         #
         #session_lifetime: 24h
 
+        # Time that an access token remains valid for, if the session is
+        # using refresh tokens.
+        # For more information about refresh tokens, please see the manual.
+        # Note that this only applies to clients which advertise support for
+        # refresh tokens.
+        #
+        # Note also that this is calculated at login time and refresh time:
+        # changes are not applied to existing sessions until they are refreshed.
+        #
+        # By default, this is 5 minutes.
+        #
+        #refreshable_access_token_lifetime: 5m
+
+        # Time that a refresh token remains valid for (provided that it is not
+        # exchanged for another one first).
+        # This option can be used to automatically log-out inactive sessions.
+        # Please see the manual for more information.
+        #
+        # Note also that this is calculated at login time and refresh time:
+        # changes are not applied to existing sessions until they are refreshed.
+        #
+        # By default, this is infinite.
+        #
+        #refresh_token_lifetime: 24h
+
+        # Time that an access token remains valid for, if the session is NOT
+        # using refresh tokens.
+        # Please note that not all clients support refresh tokens, so setting
+        # this to a short value may be inconvenient for some users who will
+        # then be logged out frequently.
+        #
+        # Note also that this is calculated at login time: changes are not applied
+        # retrospectively to existing sessions for users that have already logged in.
+        #
+        # By default, this is infinite.
+        #
+        #nonrefreshable_access_token_lifetime: 24h
+
         # The user must provide all of the below types of 3PID when registering.
         #
         #registrations_require_3pid:

synapse/rest/client/login.py

@@ -72,7 +72,7 @@ class LoginRestServlet(RestServlet):
     JWT_TYPE_DEPRECATED = "m.login.jwt"
     APPSERVICE_TYPE = "m.login.application_service"
     APPSERVICE_TYPE_UNSTABLE = "uk.half-shot.msc2778.login.application_service"
-    REFRESH_TOKEN_PARAM = "org.matrix.msc2918.refresh_token"
+    REFRESH_TOKEN_PARAM = "refresh_token"
 
     def __init__(self, hs: "HomeServer"):
         super().__init__()
@@ -90,7 +90,7 @@ class LoginRestServlet(RestServlet):
         self.saml2_enabled = hs.config.saml2.saml2_enabled
         self.cas_enabled = hs.config.cas.cas_enabled
         self.oidc_enabled = hs.config.oidc.oidc_enabled
-        self._msc2918_enabled = (
+        self._refresh_tokens_enabled = (
             hs.config.registration.refreshable_access_token_lifetime is not None
         )
 
@@ -163,17 +163,16 @@ class LoginRestServlet(RestServlet):
     async def on_POST(self, request: SynapseRequest) -> Tuple[int, LoginResponse]:
         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 = login_submission.get(
-                "org.matrix.msc2918.refresh_token", False
-            )
-            if not isinstance(should_issue_refresh_token, bool):
-                raise SynapseError(
-                    400, "`org.matrix.msc2918.refresh_token` should be true or false."
-                )
-        else:
-            should_issue_refresh_token = False
+        # Check to see if the client requested a refresh token.
+        client_requested_refresh_token = login_submission.get(
+            LoginRestServlet.REFRESH_TOKEN_PARAM, False
+        )
+        if not isinstance(client_requested_refresh_token, bool):
+            raise SynapseError(400, "`refresh_token` should be true or false.")
+
+        should_issue_refresh_token = (
+            self._refresh_tokens_enabled and client_requested_refresh_token
+        )
 
         try:
             if login_submission["type"] in (
@@ -463,9 +462,7 @@ def _get_auth_flow_dict_for_idp(idp: SsoIdentityProvider) -> JsonDict:
 
 
 class RefreshTokenServlet(RestServlet):
-    PATTERNS = client_patterns(
-        "/org.matrix.msc2918.refresh_token/refresh$", releases=(), unstable=True
-    )
+    PATTERNS = (re.compile("^/_matrix/client/v1/refresh$"),)
 
     def __init__(self, hs: "HomeServer"):
         self._auth_handler = hs.get_auth_handler()

synapse/rest/client/register.py

@@ -419,7 +419,7 @@ class RegisterRestServlet(RestServlet):
         self.password_policy_handler = hs.get_password_policy_handler()
         self.clock = hs.get_clock()
         self._registration_enabled = self.hs.config.registration.enable_registration
-        self._msc2918_enabled = (
+        self._refresh_tokens_enabled = (
             hs.config.registration.refreshable_access_token_lifetime is not None
         )
 
@@ -445,18 +445,15 @@ class RegisterRestServlet(RestServlet):
                 f"Do not understand membership kind: {kind}",
             )
 
-        if self._msc2918_enabled:
-            # Check if this registration should also issue a refresh token, as
-            # per MSC2918
-            should_issue_refresh_token = body.get(
-                "org.matrix.msc2918.refresh_token", False
-            )
-            if not isinstance(should_issue_refresh_token, bool):
-                raise SynapseError(
-                    400, "`org.matrix.msc2918.refresh_token` should be true or false."
-                )
-        else:
-            should_issue_refresh_token = False
+        # Check if the clients wishes for this registration to issue a refresh
+        # token.
+        client_requested_refresh_tokens = body.get("refresh_token", False)
+        if not isinstance(client_requested_refresh_tokens, bool):
+            raise SynapseError(400, "`refresh_token` should be true or false.")
+
+        should_issue_refresh_token = (
+            self._refresh_tokens_enabled and client_requested_refresh_tokens
+        )
 
         # Pull out the provided username and do basic sanity checks early since
         # the auth layer will store these in sessions.