From 360ba89c50ea5cbf824e54f04d536b89b57f3304 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Wed, 8 Aug 2018 11:54:55 +0100 Subject: [PATCH] Don't fail requests to unbind 3pids for non supporting ID servers Older identity servers may not support the unbind 3pid request, so we shouldn't fail the requests if we received one of 400/404/501. The request still fails if we receive e.g. 500 responses, allowing clients to retry requests on transient identity server errors that otherwise do support the API. Fixes #3661 --- changelog.d/3661.bugfix | 1 + synapse/handlers/auth.py | 20 ++++++++++++++--- synapse/handlers/deactivate_account.py | 13 +++++++++-- synapse/handlers/identity.py | 30 +++++++++++++++++-------- synapse/rest/client/v1/admin.py | 11 +++++++-- synapse/rest/client/v2_alpha/account.py | 22 ++++++++++++++---- 6 files changed, 77 insertions(+), 20 deletions(-) create mode 100644 changelog.d/3661.bugfix diff --git a/changelog.d/3661.bugfix b/changelog.d/3661.bugfix new file mode 100644 index 000000000..f2b4703d8 --- /dev/null +++ b/changelog.d/3661.bugfix @@ -0,0 +1 @@ +Fix bug on deleting 3pid when using identity servers that don't support unbind API diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py index 184eef09d..da17e73fd 100644 --- a/synapse/handlers/auth.py +++ b/synapse/handlers/auth.py @@ -828,12 +828,26 @@ class AuthHandler(BaseHandler): @defer.inlineCallbacks def delete_threepid(self, user_id, medium, address): + """Attempts to unbind the 3pid on the identity servers and deletes it + from the local database. + + Args: + user_id (str) + medium (str) + address (str) + + Returns: + Deferred[bool]: Returns True if successfully unbound the 3pid on + the identity server, False if identity server doesn't support the + unbind API. + """ + # 'Canonicalise' email addresses as per above if medium == 'email': address = address.lower() identity_handler = self.hs.get_handlers().identity_handler - yield identity_handler.unbind_threepid( + result = yield identity_handler.try_unbind_threepid( user_id, { 'medium': medium, @@ -841,10 +855,10 @@ class AuthHandler(BaseHandler): }, ) - ret = yield self.store.user_delete_threepid( + yield self.store.user_delete_threepid( user_id, medium, address, ) - defer.returnValue(ret) + defer.returnValue(result) def _save_session(self, session): # TODO: Persistent storage diff --git a/synapse/handlers/deactivate_account.py b/synapse/handlers/deactivate_account.py index b3c5a9ee6..b078df4a7 100644 --- a/synapse/handlers/deactivate_account.py +++ b/synapse/handlers/deactivate_account.py @@ -51,7 +51,8 @@ class DeactivateAccountHandler(BaseHandler): erase_data (bool): whether to GDPR-erase the user's data Returns: - Deferred + Deferred[bool]: True if identity server supports removing + threepids, otherwise False. """ # FIXME: Theoretically there is a race here wherein user resets # password using threepid. @@ -60,16 +61,22 @@ class DeactivateAccountHandler(BaseHandler): # leave the user still active so they can try again. # Ideally we would prevent password resets and then do this in the # background thread. + + # This will be set to false if the identity server doesn't support + # unbinding + identity_server_supports_unbinding = True + threepids = yield self.store.user_get_threepids(user_id) for threepid in threepids: try: - yield self._identity_handler.unbind_threepid( + result = yield self._identity_handler.try_unbind_threepid( user_id, { 'medium': threepid['medium'], 'address': threepid['address'], }, ) + identity_server_supports_unbinding &= result except Exception: # Do we want this to be a fatal error or should we carry on? logger.exception("Failed to remove threepid from ID server") @@ -103,6 +110,8 @@ class DeactivateAccountHandler(BaseHandler): # parts users from rooms (if it isn't already running) self._start_user_parting() + defer.returnValue(identity_server_supports_unbinding) + def _start_user_parting(self): """ Start the process that goes through the table of users diff --git a/synapse/handlers/identity.py b/synapse/handlers/identity.py index 1d36d967c..a0f5fecc9 100644 --- a/synapse/handlers/identity.py +++ b/synapse/handlers/identity.py @@ -137,15 +137,19 @@ class IdentityHandler(BaseHandler): defer.returnValue(data) @defer.inlineCallbacks - def unbind_threepid(self, mxid, threepid): - """ - Removes a binding from an identity server + def try_unbind_threepid(self, mxid, threepid): + """Removes a binding from an identity server + Args: mxid (str): Matrix user ID of binding to be removed threepid (dict): Dict with medium & address of binding to be removed + Raises: + SynapseError: If we failed to contact the identity server + Returns: - Deferred[bool]: True on success, otherwise False + Deferred[bool]: True on success, otherwise False if the identity + server doesn't support unbinding """ logger.debug("unbinding threepid %r from %s", threepid, mxid) if not self.trusted_id_servers: @@ -175,11 +179,19 @@ class IdentityHandler(BaseHandler): content=content, destination_is=id_server, ) - yield self.http_client.post_json_get_json( - url, - content, - headers, - ) + try: + yield self.http_client.post_json_get_json( + url, + content, + headers, + ) + except HttpResponseException as e: + if e.code in (400, 404, 501,): + # The remote server probably doesn't support unbinding (yet) + defer.returnValue(False) + else: + raise SynapseError(502, "Failed to contact identity server") + defer.returnValue(True) @defer.inlineCallbacks diff --git a/synapse/rest/client/v1/admin.py b/synapse/rest/client/v1/admin.py index 80d625eec..ad536ab57 100644 --- a/synapse/rest/client/v1/admin.py +++ b/synapse/rest/client/v1/admin.py @@ -391,10 +391,17 @@ class DeactivateAccountRestServlet(ClientV1RestServlet): if not is_admin: raise AuthError(403, "You are not a server admin") - yield self._deactivate_account_handler.deactivate_account( + result = yield self._deactivate_account_handler.deactivate_account( target_user_id, erase, ) - defer.returnValue((200, {})) + if result: + id_server_unbind_result = "success" + else: + id_server_unbind_result = "no-support" + + defer.returnValue((200, { + "id_server_unbind_result": id_server_unbind_result, + })) class ShutdownRoomRestServlet(ClientV1RestServlet): diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py index eeae466d8..372648caf 100644 --- a/synapse/rest/client/v2_alpha/account.py +++ b/synapse/rest/client/v2_alpha/account.py @@ -209,10 +209,17 @@ class DeactivateAccountRestServlet(RestServlet): yield self.auth_handler.validate_user_via_ui_auth( requester, body, self.hs.get_ip_from_request(request), ) - yield self._deactivate_account_handler.deactivate_account( + result = yield self._deactivate_account_handler.deactivate_account( requester.user.to_string(), erase, ) - defer.returnValue((200, {})) + if result: + id_server_unbind_result = "success" + else: + id_server_unbind_result = "no-support" + + defer.returnValue((200, { + "id_server_unbind_result": id_server_unbind_result, + })) class EmailThreepidRequestTokenRestServlet(RestServlet): @@ -364,7 +371,7 @@ class ThreepidDeleteRestServlet(RestServlet): user_id = requester.user.to_string() try: - yield self.auth_handler.delete_threepid( + ret = yield self.auth_handler.delete_threepid( user_id, body['medium'], body['address'] ) except Exception: @@ -374,7 +381,14 @@ class ThreepidDeleteRestServlet(RestServlet): logger.exception("Failed to remove threepid") raise SynapseError(500, "Failed to remove threepid") - defer.returnValue((200, {})) + if ret: + id_server_unbind_result = "success" + else: + id_server_unbind_result = "no-support" + + defer.returnValue((200, { + "id_server_unbind_result": id_server_unbind_result, + })) class WhoamiRestServlet(RestServlet):