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Factor out a validate_user_via_ui_auth method 

Collect together all the places that validate a logged-in user via UI auth.
pull/2728/head
Richard van der Hoff 2017-12-04 16:38:10 +00:00
parent aa6ecf0984
commit d7ea8c4800
3 changed files with 102 additions and 74 deletions
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43
synapse/handlers/auth.py
View File

@ -88,6 +88,49 @@ 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):
"""

71
synapse/rest/client/v2_alpha/account.py
View File

@ -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,
@ -103,26 +103,32 @@ 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)
params = yield self.auth_handler.validate_user_via_ui_auth(
requester, body, self.hs.get_ip_from_request(request),
)
user_id = requester.user.to_string()
if user_id != result[LoginType.PASSWORD]:
raise LoginError(400, "", Codes.UNKNOWN)
elif LoginType.EMAIL_IDENTITY in result:
else:
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")
@ -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
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(),
)
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)
defer.returnValue((200, {}))

26
synapse/rest/client/v2_alpha/devices.py
View File

@ -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))
yield self.auth_handler.validate_user_via_ui_auth(
requester, 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.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