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Merge pull request #2728 from matrix-org/rav/validate_user_via_ui_auth
Factor out a validate_user_via_ui_auth method
This commit is contained in:
Richard van der Hoff
GitHub
commit
cc58e177f3
3 changed files with 102 additions and 74 deletions
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@ -88,6 +88,49 @@ class AuthHandler(BaseHandler):
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)
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self._supported_login_types = frozenset(login_types)
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@defer.inlineCallbacks
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def validate_user_via_ui_auth(self, requester, request_body, clientip):
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"""
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Checks that the user is who they claim to be, via a UI auth.
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This is used for things like device deletion and password reset where
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the user already has a valid access token, but we want to double-check
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that it isn't stolen by re-authenticating them.
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Args:
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requester (Requester): The user, as given by the access token
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request_body (dict): The body of the request sent by the client
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clientip (str): The IP address of the client.
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Returns:
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defer.Deferred[dict]: the parameters for this request (which may
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have been given only in a previous call).
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Raises:
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InteractiveAuthIncompleteError if the client has not yet completed
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any of the permitted login flows
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AuthError if the client has completed a login flow, and it gives
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a different user to `requester`
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"""
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# we only support password login here
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flows = [[LoginType.PASSWORD]]
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result, params, _ = yield self.check_auth(
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flows, request_body, clientip,
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)
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user_id = result[LoginType.PASSWORD]
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# check that the UI auth matched the access token
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if user_id != requester.user.to_string():
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raise AuthError(403, "Invalid auth")
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defer.returnValue(params)
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@defer.inlineCallbacks
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def check_auth(self, flows, clientdict, clientip):
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"""
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@ -19,7 +19,7 @@ from twisted.internet import defer
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from synapse.api.auth import has_access_token
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from synapse.api.constants import LoginType
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from synapse.api.errors import Codes, LoginError, SynapseError
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from synapse.api.errors import Codes, SynapseError
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from synapse.http.servlet import (
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RestServlet, assert_params_in_request,
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parse_json_object_from_request,
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@ -103,44 +103,50 @@ class PasswordRestServlet(RestServlet):
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@interactive_auth_handler
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@defer.inlineCallbacks
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def on_POST(self, request):
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yield run_on_reactor()
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body = parse_json_object_from_request(request)
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result, params, _ = yield self.auth_handler.check_auth([
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[LoginType.PASSWORD],
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[LoginType.EMAIL_IDENTITY],
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[LoginType.MSISDN],
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], body, self.hs.get_ip_from_request(request))
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# there are two possibilities here. Either the user does not have an
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# access token, and needs to do a password reset; or they have one and
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# need to validate their identity.
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#
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# In the first case, we offer a couple of means of identifying
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# themselves (email and msisdn, though it's unclear if msisdn actually
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# works).
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#
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# In the second case, we require a password to confirm their identity.
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user_id = None
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requester = None
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if LoginType.PASSWORD in result:
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# if using password, they should also be logged in
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if has_access_token(request):
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requester = yield self.auth.get_user_by_req(request)
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user_id = requester.user.to_string()
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if user_id != result[LoginType.PASSWORD]:
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raise LoginError(400, "", Codes.UNKNOWN)
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elif LoginType.EMAIL_IDENTITY in result:
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threepid = result[LoginType.EMAIL_IDENTITY]
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if 'medium' not in threepid or 'address' not in threepid:
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raise SynapseError(500, "Malformed threepid")
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if threepid['medium'] == 'email':
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# For emails, transform the address to lowercase.
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# We store all email addreses as lowercase in the DB.
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# (See add_threepid in synapse/handlers/auth.py)
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threepid['address'] = threepid['address'].lower()
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# if using email, we must know about the email they're authing with!
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threepid_user_id = yield self.datastore.get_user_id_by_threepid(
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threepid['medium'], threepid['address']
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params = yield self.auth_handler.validate_user_via_ui_auth(
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requester, body, self.hs.get_ip_from_request(request),
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)
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if not threepid_user_id:
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raise SynapseError(404, "Email address not found", Codes.NOT_FOUND)
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user_id = threepid_user_id
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user_id = requester.user.to_string()
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else:
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logger.error("Auth succeeded but no known type!", result.keys())
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raise SynapseError(500, "", Codes.UNKNOWN)
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requester = None
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result, params, _ = yield self.auth_handler.check_auth(
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[[LoginType.EMAIL_IDENTITY], [LoginType.MSISDN]],
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body, self.hs.get_ip_from_request(request),
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)
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if LoginType.EMAIL_IDENTITY in result:
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threepid = result[LoginType.EMAIL_IDENTITY]
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if 'medium' not in threepid or 'address' not in threepid:
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raise SynapseError(500, "Malformed threepid")
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if threepid['medium'] == 'email':
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# For emails, transform the address to lowercase.
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# We store all email addreses as lowercase in the DB.
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# (See add_threepid in synapse/handlers/auth.py)
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threepid['address'] = threepid['address'].lower()
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# if using email, we must know about the email they're authing with!
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threepid_user_id = yield self.datastore.get_user_id_by_threepid(
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threepid['medium'], threepid['address']
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)
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if not threepid_user_id:
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raise SynapseError(404, "Email address not found", Codes.NOT_FOUND)
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user_id = threepid_user_id
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else:
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logger.error("Auth succeeded but no known type!", result.keys())
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raise SynapseError(500, "", Codes.UNKNOWN)
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if 'new_password' not in params:
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raise SynapseError(400, "", Codes.MISSING_PARAM)
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@ -171,40 +177,21 @@ class DeactivateAccountRestServlet(RestServlet):
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def on_POST(self, request):
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body = parse_json_object_from_request(request)
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# if the caller provides an access token, it ought to be valid.
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requester = None
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if has_access_token(request):
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requester = yield self.auth.get_user_by_req(
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request,
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) # type: synapse.types.Requester
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requester = yield self.auth.get_user_by_req(request)
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# allow ASes to dectivate their own users
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if requester and requester.app_service:
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if requester.app_service:
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yield self._deactivate_account_handler.deactivate_account(
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requester.user.to_string()
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)
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defer.returnValue((200, {}))
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result, params, _ = yield self.auth_handler.check_auth([
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[LoginType.PASSWORD],
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], body, self.hs.get_ip_from_request(request))
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if LoginType.PASSWORD in result:
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user_id = result[LoginType.PASSWORD]
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# if using password, they should also be logged in
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if requester is None:
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raise SynapseError(
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400,
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"Deactivate account requires an access_token",
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errcode=Codes.MISSING_TOKEN
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)
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if requester.user.to_string() != user_id:
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raise LoginError(400, "", Codes.UNKNOWN)
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else:
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logger.error("Auth succeeded but no known type!", result.keys())
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raise SynapseError(500, "", Codes.UNKNOWN)
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yield self._deactivate_account_handler.deactivate_account(user_id)
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yield self.auth_handler.validate_user_via_ui_auth(
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requester, body, self.hs.get_ip_from_request(request),
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)
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yield self._deactivate_account_handler.deactivate_account(
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requester.user.to_string(),
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)
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defer.returnValue((200, {}))
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@ -17,7 +17,7 @@ import logging
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from twisted.internet import defer
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from synapse.api import constants, errors
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from synapse.api import errors
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from synapse.http import servlet
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from ._base import client_v2_patterns, interactive_auth_handler
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@ -63,6 +63,8 @@ class DeleteDevicesRestServlet(servlet.RestServlet):
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@interactive_auth_handler
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@defer.inlineCallbacks
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def on_POST(self, request):
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requester = yield self.auth.get_user_by_req(request)
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try:
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body = servlet.parse_json_object_from_request(request)
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except errors.SynapseError as e:
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@ -78,11 +80,10 @@ class DeleteDevicesRestServlet(servlet.RestServlet):
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400, "No devices supplied", errcode=errors.Codes.MISSING_PARAM
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)
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result, params, _ = yield self.auth_handler.check_auth([
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[constants.LoginType.PASSWORD],
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], body, self.hs.get_ip_from_request(request))
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result, params, _ = yield self.auth_handler.validate_user_via_ui_auth(
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requester, body, self.hs.get_ip_from_request(request),
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)
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requester = yield self.auth.get_user_by_req(request)
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yield self.device_handler.delete_devices(
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requester.user.to_string(),
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body['devices'],
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@ -129,16 +130,13 @@ class DeviceRestServlet(servlet.RestServlet):
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else:
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raise
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result, params, _ = yield self.auth_handler.check_auth([
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[constants.LoginType.PASSWORD],
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], body, self.hs.get_ip_from_request(request))
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yield self.auth_handler.validate_user_via_ui_auth(
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requester, body, self.hs.get_ip_from_request(request),
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)
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# check that the UI auth matched the access token
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user_id = result[constants.LoginType.PASSWORD]
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if user_id != requester.user.to_string():
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raise errors.AuthError(403, "Invalid auth")
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yield self.device_handler.delete_device(user_id, device_id)
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yield self.device_handler.delete_device(
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requester.user.to_string(), device_id,
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)
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defer.returnValue((200, {}))
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@defer.inlineCallbacks
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