diff options
| -rw-r--r-- | synapse/handlers/auth.py | 43 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/account.py | 107 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/devices.py | 26 |
3 files changed, 102 insertions, 74 deletions
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py index 28c80608a7..95b0cfeb48 100644 --- a/synapse/handlers/auth.py +++ b/synapse/handlers/auth.py @@ -89,6 +89,49 @@ class AuthHandler(BaseHandler): self._supported_login_types = frozenset(login_types) @defer.inlineCallbacks + def validate_user_via_ui_auth(self, requester, request_body, clientip): + """ + Checks that the user is who they claim to be, via a UI auth. + + This is used for things like device deletion and password reset where + the user already has a valid access token, but we want to double-check + that it isn't stolen by re-authenticating them. + + Args: + requester (Requester): The user, as given by the access token + + request_body (dict): The body of the request sent by the client + + clientip (str): The IP address of the client. + + Returns: + defer.Deferred[dict]: the parameters for this request (which may + have been given only in a previous call). + + Raises: + InteractiveAuthIncompleteError if the client has not yet completed + any of the permitted login flows + + AuthError if the client has completed a login flow, and it gives + a different user to `requester` + """ + + # we only support password login here + flows = [[LoginType.PASSWORD]] + + result, params, _ = yield self.check_auth( + flows, request_body, clientip, + ) + + user_id = result[LoginType.PASSWORD] + + # check that the UI auth matched the access token + if user_id != requester.user.to_string(): + raise AuthError(403, "Invalid auth") + + defer.returnValue(params) + + @defer.inlineCallbacks def check_auth(self, flows, clientdict, clientip): """ Takes a dictionary sent by the client in the login / registration diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py index 0d59a93222..385a3ad2ec 100644 --- a/synapse/rest/client/v2_alpha/account.py +++ b/synapse/rest/client/v2_alpha/account.py @@ -19,7 +19,7 @@ from twisted.internet import defer from synapse.api.auth import has_access_token from synapse.api.constants import LoginType -from synapse.api.errors import Codes, LoginError, SynapseError +from synapse.api.errors import Codes, SynapseError from synapse.http.servlet import ( RestServlet, assert_params_in_request, parse_json_object_from_request, @@ -103,44 +103,50 @@ class PasswordRestServlet(RestServlet): @interactive_auth_handler @defer.inlineCallbacks def on_POST(self, request): - yield run_on_reactor() - body = parse_json_object_from_request(request) - result, params, _ = yield self.auth_handler.check_auth([ - [LoginType.PASSWORD], - [LoginType.EMAIL_IDENTITY], - [LoginType.MSISDN], - ], body, self.hs.get_ip_from_request(request)) + # there are two possibilities here. Either the user does not have an + # access token, and needs to do a password reset; or they have one and + # need to validate their identity. + # + # In the first case, we offer a couple of means of identifying + # themselves (email and msisdn, though it's unclear if msisdn actually + # works). + # + # In the second case, we require a password to confirm their identity. - user_id = None - requester = None - - if LoginType.PASSWORD in result: - # if using password, they should also be logged in + if has_access_token(request): requester = yield self.auth.get_user_by_req(request) - user_id = requester.user.to_string() - if user_id != result[LoginType.PASSWORD]: - raise LoginError(400, "", Codes.UNKNOWN) - elif LoginType.EMAIL_IDENTITY in result: - threepid = result[LoginType.EMAIL_IDENTITY] - if 'medium' not in threepid or 'address' not in threepid: - raise SynapseError(500, "Malformed threepid") - if threepid['medium'] == 'email': - # For emails, transform the address to lowercase. - # We store all email addreses as lowercase in the DB. - # (See add_threepid in synapse/handlers/auth.py) - threepid['address'] = threepid['address'].lower() - # if using email, we must know about the email they're authing with! - threepid_user_id = yield self.datastore.get_user_id_by_threepid( - threepid['medium'], threepid['address'] + params = yield self.auth_handler.validate_user_via_ui_auth( + requester, body, self.hs.get_ip_from_request(request), ) - if not threepid_user_id: - raise SynapseError(404, "Email address not found", Codes.NOT_FOUND) - user_id = threepid_user_id + user_id = requester.user.to_string() else: - logger.error("Auth succeeded but no known type!", result.keys()) - raise SynapseError(500, "", Codes.UNKNOWN) + requester = None + result, params, _ = yield self.auth_handler.check_auth( + [[LoginType.EMAIL_IDENTITY], [LoginType.MSISDN]], + body, self.hs.get_ip_from_request(request), + ) + + if LoginType.EMAIL_IDENTITY in result: + threepid = result[LoginType.EMAIL_IDENTITY] + if 'medium' not in threepid or 'address' not in threepid: + raise SynapseError(500, "Malformed threepid") + if threepid['medium'] == 'email': + # For emails, transform the address to lowercase. + # We store all email addreses as lowercase in the DB. + # (See add_threepid in synapse/handlers/auth.py) + threepid['address'] = threepid['address'].lower() + # if using email, we must know about the email they're authing with! + threepid_user_id = yield self.datastore.get_user_id_by_threepid( + threepid['medium'], threepid['address'] + ) + if not threepid_user_id: + raise SynapseError(404, "Email address not found", Codes.NOT_FOUND) + user_id = threepid_user_id + else: + logger.error("Auth succeeded but no known type!", result.keys()) + raise SynapseError(500, "", Codes.UNKNOWN) if 'new_password' not in params: raise SynapseError(400, "", Codes.MISSING_PARAM) @@ -171,40 +177,21 @@ class DeactivateAccountRestServlet(RestServlet): def on_POST(self, request): body = parse_json_object_from_request(request) - # if the caller provides an access token, it ought to be valid. - requester = None - if has_access_token(request): - requester = yield self.auth.get_user_by_req( - request, - ) # type: synapse.types.Requester + requester = yield self.auth.get_user_by_req(request) # allow ASes to dectivate their own users - if requester and requester.app_service: + if requester.app_service: yield self._deactivate_account_handler.deactivate_account( requester.user.to_string() ) defer.returnValue((200, {})) - result, params, _ = yield self.auth_handler.check_auth([ - [LoginType.PASSWORD], - ], body, self.hs.get_ip_from_request(request)) - - if LoginType.PASSWORD in result: - user_id = result[LoginType.PASSWORD] - # if using password, they should also be logged in - if requester is None: - raise SynapseError( - 400, - "Deactivate account requires an access_token", - errcode=Codes.MISSING_TOKEN - ) - if requester.user.to_string() != user_id: - raise LoginError(400, "", Codes.UNKNOWN) - else: - logger.error("Auth succeeded but no known type!", result.keys()) - raise SynapseError(500, "", Codes.UNKNOWN) - - yield self._deactivate_account_handler.deactivate_account(user_id) + 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( + requester.user.to_string(), + ) defer.returnValue((200, {})) diff --git a/synapse/rest/client/v2_alpha/devices.py b/synapse/rest/client/v2_alpha/devices.py index 909f9c087b..4fff02eeeb 100644 --- a/synapse/rest/client/v2_alpha/devices.py +++ b/synapse/rest/client/v2_alpha/devices.py @@ -17,7 +17,7 @@ import logging from twisted.internet import defer -from synapse.api import constants, errors +from synapse.api import errors from synapse.http import servlet from ._base import client_v2_patterns, interactive_auth_handler @@ -63,6 +63,8 @@ class DeleteDevicesRestServlet(servlet.RestServlet): @interactive_auth_handler @defer.inlineCallbacks def on_POST(self, request): + requester = yield self.auth.get_user_by_req(request) + try: body = servlet.parse_json_object_from_request(request) except errors.SynapseError as e: @@ -78,11 +80,10 @@ class DeleteDevicesRestServlet(servlet.RestServlet): 400, "No devices supplied", errcode=errors.Codes.MISSING_PARAM ) - result, params, _ = yield self.auth_handler.check_auth([ - [constants.LoginType.PASSWORD], - ], body, self.hs.get_ip_from_request(request)) + result, params, _ = yield self.auth_handler.validate_user_via_ui_auth( + requester, body, self.hs.get_ip_from_request(request), + ) - requester = yield self.auth.get_user_by_req(request) yield self.device_handler.delete_devices( requester.user.to_string(), body['devices'], @@ -129,16 +130,13 @@ class DeviceRestServlet(servlet.RestServlet): else: raise - result, params, _ = yield self.auth_handler.check_auth([ - [constants.LoginType.PASSWORD], - ], body, self.hs.get_ip_from_request(request)) - - # check that the UI auth matched the access token - user_id = result[constants.LoginType.PASSWORD] - if user_id != requester.user.to_string(): - raise errors.AuthError(403, "Invalid auth") + yield self.auth_handler.validate_user_via_ui_auth( + requester, body, self.hs.get_ip_from_request(request), + ) - yield self.device_handler.delete_device(user_id, device_id) + yield self.device_handler.delete_device( + requester.user.to_string(), device_id, + ) defer.returnValue((200, {})) @defer.inlineCallbacks |