mirror of
https://mau.dev/maunium/synapse.git
synced 2024-10-01 01:36:05 -04:00
963f4309fe
This should fix a class of bug where we forget to check if e.g. the appservice shouldn't be ratelimited. We also check the `ratelimit_override` table to check if the user has ratelimiting disabled. That table is really only meant to override the event sender ratelimiting, so we don't use any values from it (as they might not make sense for different rate limits), but we do infer that if ratelimiting is disabled for the user we should disabled all ratelimits. Fixes #9663
1789 lines
68 KiB
Python
1789 lines
68 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 - 2016 OpenMarket Ltd
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# Copyright 2017 Vector Creations Ltd
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# Copyright 2019 - 2020 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import time
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import unicodedata
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import urllib.parse
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from typing import (
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TYPE_CHECKING,
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Any,
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Awaitable,
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Callable,
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Dict,
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Iterable,
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List,
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Mapping,
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Optional,
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Tuple,
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Union,
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)
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import attr
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import bcrypt
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import pymacaroons
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from twisted.web.server import Request
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from synapse.api.constants import LoginType
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from synapse.api.errors import (
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AuthError,
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Codes,
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InteractiveAuthIncompleteError,
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LoginError,
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StoreError,
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SynapseError,
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UserDeactivatedError,
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)
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from synapse.api.ratelimiting import Ratelimiter
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from synapse.handlers._base import BaseHandler
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from synapse.handlers.ui_auth import (
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INTERACTIVE_AUTH_CHECKERS,
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UIAuthSessionDataConstants,
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)
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from synapse.handlers.ui_auth.checkers import UserInteractiveAuthChecker
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from synapse.http import get_request_user_agent
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from synapse.http.server import finish_request, respond_with_html
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from synapse.http.site import SynapseRequest
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from synapse.logging.context import defer_to_thread
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from synapse.metrics.background_process_metrics import run_as_background_process
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from synapse.module_api import ModuleApi
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from synapse.storage.roommember import ProfileInfo
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from synapse.types import JsonDict, Requester, UserID
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from synapse.util import stringutils as stringutils
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from synapse.util.async_helpers import maybe_awaitable
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from synapse.util.macaroons import get_value_from_macaroon, satisfy_expiry
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from synapse.util.msisdn import phone_number_to_msisdn
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from synapse.util.threepids import canonicalise_email
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
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def convert_client_dict_legacy_fields_to_identifier(
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submission: JsonDict,
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) -> Dict[str, str]:
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"""
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Convert a legacy-formatted login submission to an identifier dict.
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Legacy login submissions (used in both login and user-interactive authentication)
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provide user-identifying information at the top-level instead.
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These are now deprecated and replaced with identifiers:
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https://matrix.org/docs/spec/client_server/r0.6.1#identifier-types
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Args:
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submission: The client dict to convert
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Returns:
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The matching identifier dict
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Raises:
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SynapseError: If the format of the client dict is invalid
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"""
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identifier = submission.get("identifier", {})
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# Generate an m.id.user identifier if "user" parameter is present
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user = submission.get("user")
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if user:
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identifier = {"type": "m.id.user", "user": user}
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# Generate an m.id.thirdparty identifier if "medium" and "address" parameters are present
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medium = submission.get("medium")
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address = submission.get("address")
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if medium and address:
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identifier = {
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"type": "m.id.thirdparty",
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"medium": medium,
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"address": address,
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}
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# We've converted valid, legacy login submissions to an identifier. If the
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# submission still doesn't have an identifier, it's invalid
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if not identifier:
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raise SynapseError(400, "Invalid login submission", Codes.INVALID_PARAM)
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# Ensure the identifier has a type
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if "type" not in identifier:
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raise SynapseError(
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400,
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"'identifier' dict has no key 'type'",
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errcode=Codes.MISSING_PARAM,
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)
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return identifier
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def login_id_phone_to_thirdparty(identifier: JsonDict) -> Dict[str, str]:
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"""
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Convert a phone login identifier type to a generic threepid identifier.
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Args:
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identifier: Login identifier dict of type 'm.id.phone'
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Returns:
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An equivalent m.id.thirdparty identifier dict
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"""
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if "country" not in identifier or (
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# The specification requires a "phone" field, while Synapse used to require a "number"
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# field. Accept both for backwards compatibility.
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"phone" not in identifier
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and "number" not in identifier
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):
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raise SynapseError(
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400, "Invalid phone-type identifier", errcode=Codes.INVALID_PARAM
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)
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# Accept both "phone" and "number" as valid keys in m.id.phone
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phone_number = identifier.get("phone", identifier["number"])
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# Convert user-provided phone number to a consistent representation
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msisdn = phone_number_to_msisdn(identifier["country"], phone_number)
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return {
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"type": "m.id.thirdparty",
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"medium": "msisdn",
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"address": msisdn,
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}
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@attr.s(slots=True)
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class SsoLoginExtraAttributes:
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"""Data we track about SAML2 sessions"""
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# time the session was created, in milliseconds
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creation_time = attr.ib(type=int)
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extra_attributes = attr.ib(type=JsonDict)
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@attr.s(slots=True, frozen=True)
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class LoginTokenAttributes:
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"""Data we store in a short-term login token"""
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user_id = attr.ib(type=str)
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# the SSO Identity Provider that the user authenticated with, to get this token
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auth_provider_id = attr.ib(type=str)
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class AuthHandler(BaseHandler):
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SESSION_EXPIRE_MS = 48 * 60 * 60 * 1000
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def __init__(self, hs: "HomeServer"):
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super().__init__(hs)
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self.checkers = {} # type: Dict[str, UserInteractiveAuthChecker]
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for auth_checker_class in INTERACTIVE_AUTH_CHECKERS:
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inst = auth_checker_class(hs)
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if inst.is_enabled():
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self.checkers[inst.AUTH_TYPE] = inst # type: ignore
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self.bcrypt_rounds = hs.config.bcrypt_rounds
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# we can't use hs.get_module_api() here, because to do so will create an
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# import loop.
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#
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# TODO: refactor this class to separate the lower-level stuff that
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# ModuleApi can use from the higher-level stuff that uses ModuleApi, as
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# better way to break the loop
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account_handler = ModuleApi(hs, self)
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self.password_providers = [
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PasswordProvider.load(module, config, account_handler)
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for module, config in hs.config.password_providers
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]
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logger.info("Extra password_providers: %s", self.password_providers)
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self.hs = hs # FIXME better possibility to access registrationHandler later?
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self.macaroon_gen = hs.get_macaroon_generator()
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self._password_enabled = hs.config.password_enabled
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self._password_localdb_enabled = hs.config.password_localdb_enabled
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# start out by assuming PASSWORD is enabled; we will remove it later if not.
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login_types = set()
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if self._password_localdb_enabled:
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login_types.add(LoginType.PASSWORD)
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for provider in self.password_providers:
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login_types.update(provider.get_supported_login_types().keys())
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if not self._password_enabled:
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login_types.discard(LoginType.PASSWORD)
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# Some clients just pick the first type in the list. In this case, we want
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# them to use PASSWORD (rather than token or whatever), so we want to make sure
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# that comes first, where it's present.
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self._supported_login_types = []
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if LoginType.PASSWORD in login_types:
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self._supported_login_types.append(LoginType.PASSWORD)
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login_types.remove(LoginType.PASSWORD)
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self._supported_login_types.extend(login_types)
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# Ratelimiter for failed auth during UIA. Uses same ratelimit config
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# as per `rc_login.failed_attempts`.
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self._failed_uia_attempts_ratelimiter = Ratelimiter(
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store=self.store,
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clock=self.clock,
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rate_hz=self.hs.config.rc_login_failed_attempts.per_second,
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burst_count=self.hs.config.rc_login_failed_attempts.burst_count,
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)
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# The number of seconds to keep a UI auth session active.
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self._ui_auth_session_timeout = hs.config.ui_auth_session_timeout
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# Ratelimitier for failed /login attempts
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self._failed_login_attempts_ratelimiter = Ratelimiter(
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store=self.store,
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clock=hs.get_clock(),
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rate_hz=self.hs.config.rc_login_failed_attempts.per_second,
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burst_count=self.hs.config.rc_login_failed_attempts.burst_count,
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)
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self._clock = self.hs.get_clock()
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# Expire old UI auth sessions after a period of time.
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if hs.config.run_background_tasks:
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self._clock.looping_call(
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run_as_background_process,
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5 * 60 * 1000,
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"expire_old_sessions",
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self._expire_old_sessions,
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)
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# Load the SSO HTML templates.
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# The following template is shown to the user during a client login via SSO,
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# after the SSO completes and before redirecting them back to their client.
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# It notifies the user they are about to give access to their matrix account
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# to the client.
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self._sso_redirect_confirm_template = hs.config.sso_redirect_confirm_template
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# The following template is shown during user interactive authentication
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# in the fallback auth scenario. It notifies the user that they are
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# authenticating for an operation to occur on their account.
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self._sso_auth_confirm_template = hs.config.sso_auth_confirm_template
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# The following template is shown during the SSO authentication process if
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# the account is deactivated.
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self._sso_account_deactivated_template = (
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hs.config.sso_account_deactivated_template
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)
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self._server_name = hs.config.server_name
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# cast to tuple for use with str.startswith
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self._whitelisted_sso_clients = tuple(hs.config.sso_client_whitelist)
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# A mapping of user ID to extra attributes to include in the login
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# response.
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self._extra_attributes = {} # type: Dict[str, SsoLoginExtraAttributes]
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async def validate_user_via_ui_auth(
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self,
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requester: Requester,
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request: SynapseRequest,
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request_body: Dict[str, Any],
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description: str,
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) -> Tuple[dict, Optional[str]]:
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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: The user, as given by the access token
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request: The request sent by the client.
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request_body: The body of the request sent by the client
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description: A human readable string to be displayed to the user that
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describes the operation happening on their account.
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Returns:
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A tuple of (params, session_id).
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'params' contains the parameters for this request (which may
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have been given only in a previous call).
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'session_id' is the ID of this session, either passed in by the
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client or assigned by this call. This is None if UI auth was
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skipped (by re-using a previous validation).
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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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LimitExceededError if the ratelimiter's failed request count for this
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user is too high to proceed
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"""
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if not requester.access_token_id:
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raise ValueError("Cannot validate a user without an access token")
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if self._ui_auth_session_timeout:
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last_validated = await self.store.get_access_token_last_validated(
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requester.access_token_id
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)
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if self.clock.time_msec() - last_validated < self._ui_auth_session_timeout:
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# Return the input parameters, minus the auth key, which matches
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# the logic in check_ui_auth.
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request_body.pop("auth", None)
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return request_body, None
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requester_user_id = requester.user.to_string()
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# Check if we should be ratelimited due to too many previous failed attempts
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await self._failed_uia_attempts_ratelimiter.ratelimit(requester, update=False)
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# build a list of supported flows
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supported_ui_auth_types = await self._get_available_ui_auth_types(
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requester.user
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)
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flows = [[login_type] for login_type in supported_ui_auth_types]
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def get_new_session_data() -> JsonDict:
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return {UIAuthSessionDataConstants.REQUEST_USER_ID: requester_user_id}
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try:
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result, params, session_id = await self.check_ui_auth(
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flows,
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request,
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request_body,
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description,
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get_new_session_data,
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)
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except LoginError:
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# Update the ratelimiter to say we failed (`can_do_action` doesn't raise).
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await self._failed_uia_attempts_ratelimiter.can_do_action(
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requester,
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)
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raise
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# find the completed login type
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for login_type in supported_ui_auth_types:
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if login_type not in result:
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continue
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validated_user_id = result[login_type]
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break
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else:
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# this can't happen
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raise Exception("check_auth returned True but no successful login type")
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# check that the UI auth matched the access token
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if validated_user_id != requester_user_id:
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raise AuthError(403, "Invalid auth")
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# Note that the access token has been validated.
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await self.store.update_access_token_last_validated(requester.access_token_id)
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return params, session_id
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async def _get_available_ui_auth_types(self, user: UserID) -> Iterable[str]:
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"""Get a list of the authentication types this user can use"""
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ui_auth_types = set()
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# if the HS supports password auth, and the user has a non-null password, we
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# support password auth
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if self._password_localdb_enabled and self._password_enabled:
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lookupres = await self._find_user_id_and_pwd_hash(user.to_string())
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if lookupres:
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_, password_hash = lookupres
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if password_hash:
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ui_auth_types.add(LoginType.PASSWORD)
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# also allow auth from password providers
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for provider in self.password_providers:
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for t in provider.get_supported_login_types().keys():
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if t == LoginType.PASSWORD and not self._password_enabled:
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continue
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ui_auth_types.add(t)
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# if sso is enabled, allow the user to log in via SSO iff they have a mapping
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# from sso to mxid.
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if await self.hs.get_sso_handler().get_identity_providers_for_user(
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user.to_string()
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):
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ui_auth_types.add(LoginType.SSO)
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return ui_auth_types
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def get_enabled_auth_types(self):
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"""Return the enabled user-interactive authentication types
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Returns the UI-Auth types which are supported by the homeserver's current
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config.
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"""
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return self.checkers.keys()
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async def check_ui_auth(
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self,
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flows: List[List[str]],
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request: SynapseRequest,
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clientdict: Dict[str, Any],
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description: str,
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get_new_session_data: Optional[Callable[[], JsonDict]] = None,
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) -> Tuple[dict, dict, str]:
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"""
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Takes a dictionary sent by the client in the login / registration
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protocol and handles the User-Interactive Auth flow.
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If no auth flows have been completed successfully, raises an
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InteractiveAuthIncompleteError. To handle this, you can use
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synapse.rest.client.v2_alpha._base.interactive_auth_handler as a
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decorator.
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Args:
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flows: A list of login flows. Each flow is an ordered list of
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strings representing auth-types. At least one full
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flow must be completed in order for auth to be successful.
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request: The request sent by the client.
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clientdict: The dictionary from the client root level, not the
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'auth' key: this method prompts for auth if none is sent.
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description: A human readable string to be displayed to the user that
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describes the operation happening on their account.
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get_new_session_data:
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an optional callback which will be called when starting a new session.
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it should return data to be stored as part of the session.
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The keys of the returned data should be entries in
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UIAuthSessionDataConstants.
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Returns:
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A tuple of (creds, params, session_id).
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'creds' contains the authenticated credentials of each stage.
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'params' contains the parameters for this request (which may
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have been given only in a previous call).
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'session_id' is the ID of this session, either passed in by the
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client or assigned by this call
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Raises:
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InteractiveAuthIncompleteError if the client has not yet completed
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all the stages in any of the permitted flows.
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"""
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sid = None # type: Optional[str]
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authdict = clientdict.pop("auth", {})
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if "session" in authdict:
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sid = authdict["session"]
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# Convert the URI and method to strings.
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uri = request.uri.decode("utf-8") # type: ignore
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method = request.method.decode("utf-8")
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# If there's no session ID, create a new session.
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if not sid:
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new_session_data = get_new_session_data() if get_new_session_data else {}
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session = await self.store.create_ui_auth_session(
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clientdict, uri, method, description
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)
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|
|
for k, v in new_session_data.items():
|
|
await self.set_session_data(session.session_id, k, v)
|
|
|
|
else:
|
|
try:
|
|
session = await self.store.get_ui_auth_session(sid)
|
|
except StoreError:
|
|
raise SynapseError(400, "Unknown session ID: %s" % (sid,))
|
|
|
|
# If the client provides parameters, update what is persisted,
|
|
# otherwise use whatever was last provided.
|
|
#
|
|
# This was designed to allow the client to omit the parameters
|
|
# and just supply the session in subsequent calls so it split
|
|
# auth between devices by just sharing the session, (eg. so you
|
|
# could continue registration from your phone having clicked the
|
|
# email auth link on there). It's probably too open to abuse
|
|
# because it lets unauthenticated clients store arbitrary objects
|
|
# on a homeserver.
|
|
#
|
|
# Revisit: Assuming the REST APIs do sensible validation, the data
|
|
# isn't arbitrary.
|
|
#
|
|
# Note that the registration endpoint explicitly removes the
|
|
# "initial_device_display_name" parameter if it is provided
|
|
# without a "password" parameter. See the changes to
|
|
# synapse.rest.client.v2_alpha.register.RegisterRestServlet.on_POST
|
|
# in commit 544722bad23fc31056b9240189c3cbbbf0ffd3f9.
|
|
if not clientdict:
|
|
clientdict = session.clientdict
|
|
|
|
# Ensure that the queried operation does not vary between stages of
|
|
# the UI authentication session. This is done by generating a stable
|
|
# comparator and storing it during the initial query. Subsequent
|
|
# queries ensure that this comparator has not changed.
|
|
#
|
|
# The comparator is based on the requested URI and HTTP method. The
|
|
# client dict (minus the auth dict) should also be checked, but some
|
|
# clients are not spec compliant, just warn for now if the client
|
|
# dict changes.
|
|
if (session.uri, session.method) != (uri, method):
|
|
raise SynapseError(
|
|
403,
|
|
"Requested operation has changed during the UI authentication session.",
|
|
)
|
|
|
|
if session.clientdict != clientdict:
|
|
logger.warning(
|
|
"Requested operation has changed during the UI "
|
|
"authentication session. A future version of Synapse "
|
|
"will remove this capability."
|
|
)
|
|
|
|
# For backwards compatibility, changes to the client dict are
|
|
# persisted as clients modify them throughout their user interactive
|
|
# authentication flow.
|
|
await self.store.set_ui_auth_clientdict(sid, clientdict)
|
|
|
|
user_agent = get_request_user_agent(request)
|
|
clientip = request.getClientIP()
|
|
|
|
await self.store.add_user_agent_ip_to_ui_auth_session(
|
|
session.session_id, user_agent, clientip
|
|
)
|
|
|
|
if not authdict:
|
|
raise InteractiveAuthIncompleteError(
|
|
session.session_id, self._auth_dict_for_flows(flows, session.session_id)
|
|
)
|
|
|
|
# check auth type currently being presented
|
|
errordict = {} # type: Dict[str, Any]
|
|
if "type" in authdict:
|
|
login_type = authdict["type"] # type: str
|
|
try:
|
|
result = await self._check_auth_dict(authdict, clientip)
|
|
if result:
|
|
await self.store.mark_ui_auth_stage_complete(
|
|
session.session_id, login_type, result
|
|
)
|
|
except LoginError as e:
|
|
# this step failed. Merge the error dict into the response
|
|
# so that the client can have another go.
|
|
errordict = e.error_dict()
|
|
|
|
creds = await self.store.get_completed_ui_auth_stages(session.session_id)
|
|
for f in flows:
|
|
# If all the required credentials have been supplied, the user has
|
|
# successfully completed the UI auth process!
|
|
if len(set(f) - set(creds)) == 0:
|
|
# it's very useful to know what args are stored, but this can
|
|
# include the password in the case of registering, so only log
|
|
# the keys (confusingly, clientdict may contain a password
|
|
# param, creds is just what the user authed as for UI auth
|
|
# and is not sensitive).
|
|
logger.info(
|
|
"Auth completed with creds: %r. Client dict has keys: %r",
|
|
creds,
|
|
list(clientdict),
|
|
)
|
|
|
|
return creds, clientdict, session.session_id
|
|
|
|
ret = self._auth_dict_for_flows(flows, session.session_id)
|
|
ret["completed"] = list(creds)
|
|
ret.update(errordict)
|
|
raise InteractiveAuthIncompleteError(session.session_id, ret)
|
|
|
|
async def add_oob_auth(
|
|
self, stagetype: str, authdict: Dict[str, Any], clientip: str
|
|
) -> bool:
|
|
"""
|
|
Adds the result of out-of-band authentication into an existing auth
|
|
session. Currently used for adding the result of fallback auth.
|
|
"""
|
|
if stagetype not in self.checkers:
|
|
raise LoginError(400, "", Codes.MISSING_PARAM)
|
|
if "session" not in authdict:
|
|
raise LoginError(400, "", Codes.MISSING_PARAM)
|
|
|
|
result = await self.checkers[stagetype].check_auth(authdict, clientip)
|
|
if result:
|
|
await self.store.mark_ui_auth_stage_complete(
|
|
authdict["session"], stagetype, result
|
|
)
|
|
return True
|
|
return False
|
|
|
|
def get_session_id(self, clientdict: Dict[str, Any]) -> Optional[str]:
|
|
"""
|
|
Gets the session ID for a client given the client dictionary
|
|
|
|
Args:
|
|
clientdict: The dictionary sent by the client in the request
|
|
|
|
Returns:
|
|
The string session ID the client sent. If the client did
|
|
not send a session ID, returns None.
|
|
"""
|
|
sid = None
|
|
if clientdict and "auth" in clientdict:
|
|
authdict = clientdict["auth"]
|
|
if "session" in authdict:
|
|
sid = authdict["session"]
|
|
return sid
|
|
|
|
async def set_session_data(self, session_id: str, key: str, value: Any) -> None:
|
|
"""
|
|
Store a key-value pair into the sessions data associated with this
|
|
request. This data is stored server-side and cannot be modified by
|
|
the client.
|
|
|
|
Args:
|
|
session_id: The ID of this session as returned from check_auth
|
|
key: The key to store the data under. An entry from
|
|
UIAuthSessionDataConstants.
|
|
value: The data to store
|
|
"""
|
|
try:
|
|
await self.store.set_ui_auth_session_data(session_id, key, value)
|
|
except StoreError:
|
|
raise SynapseError(400, "Unknown session ID: %s" % (session_id,))
|
|
|
|
async def get_session_data(
|
|
self, session_id: str, key: str, default: Optional[Any] = None
|
|
) -> Any:
|
|
"""
|
|
Retrieve data stored with set_session_data
|
|
|
|
Args:
|
|
session_id: The ID of this session as returned from check_auth
|
|
key: The key the data was stored under. An entry from
|
|
UIAuthSessionDataConstants.
|
|
default: Value to return if the key has not been set
|
|
"""
|
|
try:
|
|
return await self.store.get_ui_auth_session_data(session_id, key, default)
|
|
except StoreError:
|
|
raise SynapseError(400, "Unknown session ID: %s" % (session_id,))
|
|
|
|
async def _expire_old_sessions(self):
|
|
"""
|
|
Invalidate any user interactive authentication sessions that have expired.
|
|
"""
|
|
now = self._clock.time_msec()
|
|
expiration_time = now - self.SESSION_EXPIRE_MS
|
|
await self.store.delete_old_ui_auth_sessions(expiration_time)
|
|
|
|
async def _check_auth_dict(
|
|
self, authdict: Dict[str, Any], clientip: str
|
|
) -> Union[Dict[str, Any], str]:
|
|
"""Attempt to validate the auth dict provided by a client
|
|
|
|
Args:
|
|
authdict: auth dict provided by the client
|
|
clientip: IP address of the client
|
|
|
|
Returns:
|
|
Result of the stage verification.
|
|
|
|
Raises:
|
|
StoreError if there was a problem accessing the database
|
|
SynapseError if there was a problem with the request
|
|
LoginError if there was an authentication problem.
|
|
"""
|
|
login_type = authdict["type"]
|
|
checker = self.checkers.get(login_type)
|
|
if checker is not None:
|
|
res = await checker.check_auth(authdict, clientip=clientip)
|
|
return res
|
|
|
|
# fall back to the v1 login flow
|
|
canonical_id, _ = await self.validate_login(authdict)
|
|
return canonical_id
|
|
|
|
def _get_params_recaptcha(self) -> dict:
|
|
return {"public_key": self.hs.config.recaptcha_public_key}
|
|
|
|
def _get_params_terms(self) -> dict:
|
|
return {
|
|
"policies": {
|
|
"privacy_policy": {
|
|
"version": self.hs.config.user_consent_version,
|
|
"en": {
|
|
"name": self.hs.config.user_consent_policy_name,
|
|
"url": "%s_matrix/consent?v=%s"
|
|
% (
|
|
self.hs.config.public_baseurl,
|
|
self.hs.config.user_consent_version,
|
|
),
|
|
},
|
|
}
|
|
}
|
|
}
|
|
|
|
def _auth_dict_for_flows(
|
|
self,
|
|
flows: List[List[str]],
|
|
session_id: str,
|
|
) -> Dict[str, Any]:
|
|
public_flows = []
|
|
for f in flows:
|
|
public_flows.append(f)
|
|
|
|
get_params = {
|
|
LoginType.RECAPTCHA: self._get_params_recaptcha,
|
|
LoginType.TERMS: self._get_params_terms,
|
|
}
|
|
|
|
params = {} # type: Dict[str, Any]
|
|
|
|
for f in public_flows:
|
|
for stage in f:
|
|
if stage in get_params and stage not in params:
|
|
params[stage] = get_params[stage]()
|
|
|
|
return {
|
|
"session": session_id,
|
|
"flows": [{"stages": f} for f in public_flows],
|
|
"params": params,
|
|
}
|
|
|
|
async def get_access_token_for_user_id(
|
|
self,
|
|
user_id: str,
|
|
device_id: Optional[str],
|
|
valid_until_ms: Optional[int],
|
|
puppets_user_id: Optional[str] = None,
|
|
is_appservice_ghost: bool = False,
|
|
) -> str:
|
|
"""
|
|
Creates a new access token for the user with the given user ID.
|
|
|
|
The user is assumed to have been authenticated by some other
|
|
mechanism (e.g. CAS), and the user_id converted to the canonical case.
|
|
|
|
The device will be recorded in the table if it is not there already.
|
|
|
|
Args:
|
|
user_id: canonical User ID
|
|
device_id: the device ID to associate with the tokens.
|
|
None to leave the tokens unassociated with a device (deprecated:
|
|
we should always have a device ID)
|
|
valid_until_ms: when the token is valid until. None for
|
|
no expiry.
|
|
is_appservice_ghost: Whether the user is an application ghost user
|
|
Returns:
|
|
The access token for the user's session.
|
|
Raises:
|
|
StoreError if there was a problem storing the token.
|
|
"""
|
|
fmt_expiry = ""
|
|
if valid_until_ms is not None:
|
|
fmt_expiry = time.strftime(
|
|
" until %Y-%m-%d %H:%M:%S", time.localtime(valid_until_ms / 1000.0)
|
|
)
|
|
|
|
if puppets_user_id:
|
|
logger.info(
|
|
"Logging in user %s as %s%s", user_id, puppets_user_id, fmt_expiry
|
|
)
|
|
else:
|
|
logger.info(
|
|
"Logging in user %s on device %s%s", user_id, device_id, fmt_expiry
|
|
)
|
|
|
|
if (
|
|
not is_appservice_ghost
|
|
or self.hs.config.appservice.track_appservice_user_ips
|
|
):
|
|
await self.auth.check_auth_blocking(user_id)
|
|
|
|
access_token = self.macaroon_gen.generate_access_token(user_id)
|
|
await self.store.add_access_token_to_user(
|
|
user_id=user_id,
|
|
token=access_token,
|
|
device_id=device_id,
|
|
valid_until_ms=valid_until_ms,
|
|
puppets_user_id=puppets_user_id,
|
|
)
|
|
|
|
# the device *should* have been registered before we got here; however,
|
|
# it's possible we raced against a DELETE operation. The thing we
|
|
# really don't want is active access_tokens without a record of the
|
|
# device, so we double-check it here.
|
|
if device_id is not None:
|
|
try:
|
|
await self.store.get_device(user_id, device_id)
|
|
except StoreError:
|
|
await self.store.delete_access_token(access_token)
|
|
raise StoreError(400, "Login raced against device deletion")
|
|
|
|
return access_token
|
|
|
|
async def check_user_exists(self, user_id: str) -> Optional[str]:
|
|
"""
|
|
Checks to see if a user with the given id exists. Will check case
|
|
insensitively, but return None if there are multiple inexact matches.
|
|
|
|
Args:
|
|
user_id: complete @user:id
|
|
|
|
Returns:
|
|
The canonical_user_id, or None if zero or multiple matches
|
|
"""
|
|
res = await self._find_user_id_and_pwd_hash(user_id)
|
|
if res is not None:
|
|
return res[0]
|
|
return None
|
|
|
|
async def _find_user_id_and_pwd_hash(
|
|
self, user_id: str
|
|
) -> Optional[Tuple[str, str]]:
|
|
"""Checks to see if a user with the given id exists. Will check case
|
|
insensitively, but will return None if there are multiple inexact
|
|
matches.
|
|
|
|
Returns:
|
|
A 2-tuple of `(canonical_user_id, password_hash)` or `None`
|
|
if there is not exactly one match
|
|
"""
|
|
user_infos = await self.store.get_users_by_id_case_insensitive(user_id)
|
|
|
|
result = None
|
|
if not user_infos:
|
|
logger.warning("Attempted to login as %s but they do not exist", user_id)
|
|
elif len(user_infos) == 1:
|
|
# a single match (possibly not exact)
|
|
result = user_infos.popitem()
|
|
elif user_id in user_infos:
|
|
# multiple matches, but one is exact
|
|
result = (user_id, user_infos[user_id])
|
|
else:
|
|
# multiple matches, none of them exact
|
|
logger.warning(
|
|
"Attempted to login as %s but it matches more than one user "
|
|
"inexactly: %r",
|
|
user_id,
|
|
user_infos.keys(),
|
|
)
|
|
return result
|
|
|
|
def can_change_password(self) -> bool:
|
|
"""Get whether users on this server are allowed to change or set a password.
|
|
|
|
Both `config.password_enabled` and `config.password_localdb_enabled` must be true.
|
|
|
|
Note that any account (even SSO accounts) are allowed to add passwords if the above
|
|
is true.
|
|
|
|
Returns:
|
|
Whether users on this server are allowed to change or set a password
|
|
"""
|
|
return self._password_enabled and self._password_localdb_enabled
|
|
|
|
def get_supported_login_types(self) -> Iterable[str]:
|
|
"""Get a the login types supported for the /login API
|
|
|
|
By default this is just 'm.login.password' (unless password_enabled is
|
|
False in the config file), but password auth providers can provide
|
|
other login types.
|
|
|
|
Returns:
|
|
login types
|
|
"""
|
|
return self._supported_login_types
|
|
|
|
async def validate_login(
|
|
self,
|
|
login_submission: Dict[str, Any],
|
|
ratelimit: bool = False,
|
|
) -> Tuple[str, Optional[Callable[[Dict[str, str]], Awaitable[None]]]]:
|
|
"""Authenticates the user for the /login API
|
|
|
|
Also used by the user-interactive auth flow to validate auth types which don't
|
|
have an explicit UIA handler, including m.password.auth.
|
|
|
|
Args:
|
|
login_submission: the whole of the login submission
|
|
(including 'type' and other relevant fields)
|
|
ratelimit: whether to apply the failed_login_attempt ratelimiter
|
|
Returns:
|
|
A tuple of the canonical user id, and optional callback
|
|
to be called once the access token and device id are issued
|
|
Raises:
|
|
StoreError if there was a problem accessing the database
|
|
SynapseError if there was a problem with the request
|
|
LoginError if there was an authentication problem.
|
|
"""
|
|
login_type = login_submission.get("type")
|
|
if not isinstance(login_type, str):
|
|
raise SynapseError(400, "Bad parameter: type", Codes.INVALID_PARAM)
|
|
|
|
# ideally, we wouldn't be checking the identifier unless we know we have a login
|
|
# method which uses it (https://github.com/matrix-org/synapse/issues/8836)
|
|
#
|
|
# But the auth providers' check_auth interface requires a username, so in
|
|
# practice we can only support login methods which we can map to a username
|
|
# anyway.
|
|
|
|
# special case to check for "password" for the check_password interface
|
|
# for the auth providers
|
|
password = login_submission.get("password")
|
|
if login_type == LoginType.PASSWORD:
|
|
if not self._password_enabled:
|
|
raise SynapseError(400, "Password login has been disabled.")
|
|
if not isinstance(password, str):
|
|
raise SynapseError(400, "Bad parameter: password", Codes.INVALID_PARAM)
|
|
|
|
# map old-school login fields into new-school "identifier" fields.
|
|
identifier_dict = convert_client_dict_legacy_fields_to_identifier(
|
|
login_submission
|
|
)
|
|
|
|
# convert phone type identifiers to generic threepids
|
|
if identifier_dict["type"] == "m.id.phone":
|
|
identifier_dict = login_id_phone_to_thirdparty(identifier_dict)
|
|
|
|
# convert threepid identifiers to user IDs
|
|
if identifier_dict["type"] == "m.id.thirdparty":
|
|
address = identifier_dict.get("address")
|
|
medium = identifier_dict.get("medium")
|
|
|
|
if medium is None or address is None:
|
|
raise SynapseError(400, "Invalid thirdparty identifier")
|
|
|
|
# For emails, canonicalise the address.
|
|
# We store all email addresses canonicalised in the DB.
|
|
# (See add_threepid in synapse/handlers/auth.py)
|
|
if medium == "email":
|
|
try:
|
|
address = canonicalise_email(address)
|
|
except ValueError as e:
|
|
raise SynapseError(400, str(e))
|
|
|
|
# We also apply account rate limiting using the 3PID as a key, as
|
|
# otherwise using 3PID bypasses the ratelimiting based on user ID.
|
|
if ratelimit:
|
|
await self._failed_login_attempts_ratelimiter.ratelimit(
|
|
None, (medium, address), update=False
|
|
)
|
|
|
|
# Check for login providers that support 3pid login types
|
|
if login_type == LoginType.PASSWORD:
|
|
# we've already checked that there is a (valid) password field
|
|
assert isinstance(password, str)
|
|
(
|
|
canonical_user_id,
|
|
callback_3pid,
|
|
) = await self.check_password_provider_3pid(medium, address, password)
|
|
if canonical_user_id:
|
|
# Authentication through password provider and 3pid succeeded
|
|
return canonical_user_id, callback_3pid
|
|
|
|
# No password providers were able to handle this 3pid
|
|
# Check local store
|
|
user_id = await self.hs.get_datastore().get_user_id_by_threepid(
|
|
medium, address
|
|
)
|
|
if not user_id:
|
|
logger.warning(
|
|
"unknown 3pid identifier medium %s, address %r", medium, address
|
|
)
|
|
# We mark that we've failed to log in here, as
|
|
# `check_password_provider_3pid` might have returned `None` due
|
|
# to an incorrect password, rather than the account not
|
|
# existing.
|
|
#
|
|
# If it returned None but the 3PID was bound then we won't hit
|
|
# this code path, which is fine as then the per-user ratelimit
|
|
# will kick in below.
|
|
if ratelimit:
|
|
await self._failed_login_attempts_ratelimiter.can_do_action(
|
|
None, (medium, address)
|
|
)
|
|
raise LoginError(403, "", errcode=Codes.FORBIDDEN)
|
|
|
|
identifier_dict = {"type": "m.id.user", "user": user_id}
|
|
|
|
# by this point, the identifier should be an m.id.user: if it's anything
|
|
# else, we haven't understood it.
|
|
if identifier_dict["type"] != "m.id.user":
|
|
raise SynapseError(400, "Unknown login identifier type")
|
|
|
|
username = identifier_dict.get("user")
|
|
if not username:
|
|
raise SynapseError(400, "User identifier is missing 'user' key")
|
|
|
|
if username.startswith("@"):
|
|
qualified_user_id = username
|
|
else:
|
|
qualified_user_id = UserID(username, self.hs.hostname).to_string()
|
|
|
|
# Check if we've hit the failed ratelimit (but don't update it)
|
|
if ratelimit:
|
|
await self._failed_login_attempts_ratelimiter.ratelimit(
|
|
None, qualified_user_id.lower(), update=False
|
|
)
|
|
|
|
try:
|
|
return await self._validate_userid_login(username, login_submission)
|
|
except LoginError:
|
|
# The user has failed to log in, so we need to update the rate
|
|
# limiter. Using `can_do_action` avoids us raising a ratelimit
|
|
# exception and masking the LoginError. The actual ratelimiting
|
|
# should have happened above.
|
|
if ratelimit:
|
|
await self._failed_login_attempts_ratelimiter.can_do_action(
|
|
None, qualified_user_id.lower()
|
|
)
|
|
raise
|
|
|
|
async def _validate_userid_login(
|
|
self,
|
|
username: str,
|
|
login_submission: Dict[str, Any],
|
|
) -> Tuple[str, Optional[Callable[[Dict[str, str]], Awaitable[None]]]]:
|
|
"""Helper for validate_login
|
|
|
|
Handles login, once we've mapped 3pids onto userids
|
|
|
|
Args:
|
|
username: the username, from the identifier dict
|
|
login_submission: the whole of the login submission
|
|
(including 'type' and other relevant fields)
|
|
Returns:
|
|
A tuple of the canonical user id, and optional callback
|
|
to be called once the access token and device id are issued
|
|
Raises:
|
|
StoreError if there was a problem accessing the database
|
|
SynapseError if there was a problem with the request
|
|
LoginError if there was an authentication problem.
|
|
"""
|
|
if username.startswith("@"):
|
|
qualified_user_id = username
|
|
else:
|
|
qualified_user_id = UserID(username, self.hs.hostname).to_string()
|
|
|
|
login_type = login_submission.get("type")
|
|
# we already checked that we have a valid login type
|
|
assert isinstance(login_type, str)
|
|
|
|
known_login_type = False
|
|
|
|
for provider in self.password_providers:
|
|
supported_login_types = provider.get_supported_login_types()
|
|
if login_type not in supported_login_types:
|
|
# this password provider doesn't understand this login type
|
|
continue
|
|
|
|
known_login_type = True
|
|
login_fields = supported_login_types[login_type]
|
|
|
|
missing_fields = []
|
|
login_dict = {}
|
|
for f in login_fields:
|
|
if f not in login_submission:
|
|
missing_fields.append(f)
|
|
else:
|
|
login_dict[f] = login_submission[f]
|
|
if missing_fields:
|
|
raise SynapseError(
|
|
400,
|
|
"Missing parameters for login type %s: %s"
|
|
% (login_type, missing_fields),
|
|
)
|
|
|
|
result = await provider.check_auth(username, login_type, login_dict)
|
|
if result:
|
|
return result
|
|
|
|
if login_type == LoginType.PASSWORD and self._password_localdb_enabled:
|
|
known_login_type = True
|
|
|
|
# we've already checked that there is a (valid) password field
|
|
password = login_submission["password"]
|
|
assert isinstance(password, str)
|
|
|
|
canonical_user_id = await self._check_local_password(
|
|
qualified_user_id, password
|
|
)
|
|
|
|
if canonical_user_id:
|
|
return canonical_user_id, None
|
|
|
|
if not known_login_type:
|
|
raise SynapseError(400, "Unknown login type %s" % login_type)
|
|
|
|
# We raise a 403 here, but note that if we're doing user-interactive
|
|
# login, it turns all LoginErrors into a 401 anyway.
|
|
raise LoginError(403, "Invalid password", errcode=Codes.FORBIDDEN)
|
|
|
|
async def check_password_provider_3pid(
|
|
self, medium: str, address: str, password: str
|
|
) -> Tuple[Optional[str], Optional[Callable[[Dict[str, str]], Awaitable[None]]]]:
|
|
"""Check if a password provider is able to validate a thirdparty login
|
|
|
|
Args:
|
|
medium: The medium of the 3pid (ex. email).
|
|
address: The address of the 3pid (ex. jdoe@example.com).
|
|
password: The password of the user.
|
|
|
|
Returns:
|
|
A tuple of `(user_id, callback)`. If authentication is successful,
|
|
`user_id`is the authenticated, canonical user ID. `callback` is
|
|
then either a function to be later run after the server has
|
|
completed login/registration, or `None`. If authentication was
|
|
unsuccessful, `user_id` and `callback` are both `None`.
|
|
"""
|
|
for provider in self.password_providers:
|
|
result = await provider.check_3pid_auth(medium, address, password)
|
|
if result:
|
|
return result
|
|
|
|
return None, None
|
|
|
|
async def _check_local_password(self, user_id: str, password: str) -> Optional[str]:
|
|
"""Authenticate a user against the local password database.
|
|
|
|
user_id is checked case insensitively, but will return None if there are
|
|
multiple inexact matches.
|
|
|
|
Args:
|
|
user_id: complete @user:id
|
|
password: the provided password
|
|
Returns:
|
|
The canonical_user_id, or None if unknown user/bad password
|
|
"""
|
|
lookupres = await self._find_user_id_and_pwd_hash(user_id)
|
|
if not lookupres:
|
|
return None
|
|
(user_id, password_hash) = lookupres
|
|
|
|
# If the password hash is None, the account has likely been deactivated
|
|
if not password_hash:
|
|
deactivated = await self.store.get_user_deactivated_status(user_id)
|
|
if deactivated:
|
|
raise UserDeactivatedError("This account has been deactivated")
|
|
|
|
result = await self.validate_hash(password, password_hash)
|
|
if not result:
|
|
logger.warning("Failed password login for user %s", user_id)
|
|
return None
|
|
return user_id
|
|
|
|
async def validate_short_term_login_token(
|
|
self, login_token: str
|
|
) -> LoginTokenAttributes:
|
|
try:
|
|
res = self.macaroon_gen.verify_short_term_login_token(login_token)
|
|
except Exception:
|
|
raise AuthError(403, "Invalid token", errcode=Codes.FORBIDDEN)
|
|
|
|
await self.auth.check_auth_blocking(res.user_id)
|
|
return res
|
|
|
|
async def delete_access_token(self, access_token: str):
|
|
"""Invalidate a single access token
|
|
|
|
Args:
|
|
access_token: access token to be deleted
|
|
|
|
"""
|
|
user_info = await self.auth.get_user_by_access_token(access_token)
|
|
await self.store.delete_access_token(access_token)
|
|
|
|
# see if any of our auth providers want to know about this
|
|
for provider in self.password_providers:
|
|
await provider.on_logged_out(
|
|
user_id=user_info.user_id,
|
|
device_id=user_info.device_id,
|
|
access_token=access_token,
|
|
)
|
|
|
|
# delete pushers associated with this access token
|
|
if user_info.token_id is not None:
|
|
await self.hs.get_pusherpool().remove_pushers_by_access_token(
|
|
user_info.user_id, (user_info.token_id,)
|
|
)
|
|
|
|
async def delete_access_tokens_for_user(
|
|
self,
|
|
user_id: str,
|
|
except_token_id: Optional[int] = None,
|
|
device_id: Optional[str] = None,
|
|
):
|
|
"""Invalidate access tokens belonging to a user
|
|
|
|
Args:
|
|
user_id: ID of user the tokens belong to
|
|
except_token_id: access_token ID which should *not* be deleted
|
|
device_id: ID of device the tokens are associated with.
|
|
If None, tokens associated with any device (or no device) will
|
|
be deleted
|
|
"""
|
|
tokens_and_devices = await self.store.user_delete_access_tokens(
|
|
user_id, except_token_id=except_token_id, device_id=device_id
|
|
)
|
|
|
|
# see if any of our auth providers want to know about this
|
|
for provider in self.password_providers:
|
|
for token, token_id, device_id in tokens_and_devices:
|
|
await provider.on_logged_out(
|
|
user_id=user_id, device_id=device_id, access_token=token
|
|
)
|
|
|
|
# delete pushers associated with the access tokens
|
|
await self.hs.get_pusherpool().remove_pushers_by_access_token(
|
|
user_id, (token_id for _, token_id, _ in tokens_and_devices)
|
|
)
|
|
|
|
async def add_threepid(
|
|
self, user_id: str, medium: str, address: str, validated_at: int
|
|
):
|
|
# check if medium has a valid value
|
|
if medium not in ["email", "msisdn"]:
|
|
raise SynapseError(
|
|
code=400,
|
|
msg=("'%s' is not a valid value for 'medium'" % (medium,)),
|
|
errcode=Codes.INVALID_PARAM,
|
|
)
|
|
|
|
# 'Canonicalise' email addresses down to lower case.
|
|
# We've now moving towards the homeserver being the entity that
|
|
# is responsible for validating threepids used for resetting passwords
|
|
# on accounts, so in future Synapse will gain knowledge of specific
|
|
# types (mediums) of threepid. For now, we still use the existing
|
|
# infrastructure, but this is the start of synapse gaining knowledge
|
|
# of specific types of threepid (and fixes the fact that checking
|
|
# for the presence of an email address during password reset was
|
|
# case sensitive).
|
|
if medium == "email":
|
|
address = canonicalise_email(address)
|
|
|
|
await self.store.user_add_threepid(
|
|
user_id, medium, address, validated_at, self.hs.get_clock().time_msec()
|
|
)
|
|
|
|
async def delete_threepid(
|
|
self, user_id: str, medium: str, address: str, id_server: Optional[str] = None
|
|
) -> bool:
|
|
"""Attempts to unbind the 3pid on the identity servers and deletes it
|
|
from the local database.
|
|
|
|
Args:
|
|
user_id: ID of user to remove the 3pid from.
|
|
medium: The medium of the 3pid being removed: "email" or "msisdn".
|
|
address: The 3pid address to remove.
|
|
id_server: Use the given identity server when unbinding
|
|
any threepids. If None then will attempt to unbind using the
|
|
identity server specified when binding (if known).
|
|
|
|
Returns:
|
|
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 = canonicalise_email(address)
|
|
|
|
identity_handler = self.hs.get_identity_handler()
|
|
result = await identity_handler.try_unbind_threepid(
|
|
user_id, {"medium": medium, "address": address, "id_server": id_server}
|
|
)
|
|
|
|
await self.store.user_delete_threepid(user_id, medium, address)
|
|
return result
|
|
|
|
async def hash(self, password: str) -> str:
|
|
"""Computes a secure hash of password.
|
|
|
|
Args:
|
|
password: Password to hash.
|
|
|
|
Returns:
|
|
Hashed password.
|
|
"""
|
|
|
|
def _do_hash():
|
|
# Normalise the Unicode in the password
|
|
pw = unicodedata.normalize("NFKC", password)
|
|
|
|
return bcrypt.hashpw(
|
|
pw.encode("utf8") + self.hs.config.password_pepper.encode("utf8"),
|
|
bcrypt.gensalt(self.bcrypt_rounds),
|
|
).decode("ascii")
|
|
|
|
return await defer_to_thread(self.hs.get_reactor(), _do_hash)
|
|
|
|
async def validate_hash(
|
|
self, password: str, stored_hash: Union[bytes, str]
|
|
) -> bool:
|
|
"""Validates that self.hash(password) == stored_hash.
|
|
|
|
Args:
|
|
password: Password to hash.
|
|
stored_hash: Expected hash value.
|
|
|
|
Returns:
|
|
Whether self.hash(password) == stored_hash.
|
|
"""
|
|
|
|
def _do_validate_hash(checked_hash: bytes):
|
|
# Normalise the Unicode in the password
|
|
pw = unicodedata.normalize("NFKC", password)
|
|
|
|
return bcrypt.checkpw(
|
|
pw.encode("utf8") + self.hs.config.password_pepper.encode("utf8"),
|
|
checked_hash,
|
|
)
|
|
|
|
if stored_hash:
|
|
if not isinstance(stored_hash, bytes):
|
|
stored_hash = stored_hash.encode("ascii")
|
|
|
|
return await defer_to_thread(
|
|
self.hs.get_reactor(), _do_validate_hash, stored_hash
|
|
)
|
|
else:
|
|
return False
|
|
|
|
async def start_sso_ui_auth(self, request: SynapseRequest, session_id: str) -> str:
|
|
"""
|
|
Get the HTML for the SSO redirect confirmation page.
|
|
|
|
Args:
|
|
request: The incoming HTTP request
|
|
session_id: The user interactive authentication session ID.
|
|
|
|
Returns:
|
|
The HTML to render.
|
|
"""
|
|
try:
|
|
session = await self.store.get_ui_auth_session(session_id)
|
|
except StoreError:
|
|
raise SynapseError(400, "Unknown session ID: %s" % (session_id,))
|
|
|
|
user_id_to_verify = await self.get_session_data(
|
|
session_id, UIAuthSessionDataConstants.REQUEST_USER_ID
|
|
) # type: str
|
|
|
|
idps = await self.hs.get_sso_handler().get_identity_providers_for_user(
|
|
user_id_to_verify
|
|
)
|
|
|
|
if not idps:
|
|
# we checked that the user had some remote identities before offering an SSO
|
|
# flow, so either it's been deleted or the client has requested SSO despite
|
|
# it not being offered.
|
|
raise SynapseError(400, "User has no SSO identities")
|
|
|
|
# for now, just pick one
|
|
idp_id, sso_auth_provider = next(iter(idps.items()))
|
|
if len(idps) > 0:
|
|
logger.warning(
|
|
"User %r has previously logged in with multiple SSO IdPs; arbitrarily "
|
|
"picking %r",
|
|
user_id_to_verify,
|
|
idp_id,
|
|
)
|
|
|
|
redirect_url = await sso_auth_provider.handle_redirect_request(
|
|
request, None, session_id
|
|
)
|
|
|
|
return self._sso_auth_confirm_template.render(
|
|
description=session.description,
|
|
redirect_url=redirect_url,
|
|
idp=sso_auth_provider,
|
|
)
|
|
|
|
async def complete_sso_login(
|
|
self,
|
|
registered_user_id: str,
|
|
auth_provider_id: str,
|
|
request: Request,
|
|
client_redirect_url: str,
|
|
extra_attributes: Optional[JsonDict] = None,
|
|
new_user: bool = False,
|
|
):
|
|
"""Having figured out a mxid for this user, complete the HTTP request
|
|
|
|
Args:
|
|
registered_user_id: The registered user ID to complete SSO login for.
|
|
auth_provider_id: The id of the SSO Identity provider that was used for
|
|
login. This will be stored in the login token for future tracking in
|
|
prometheus metrics.
|
|
request: The request to complete.
|
|
client_redirect_url: The URL to which to redirect the user at the end of the
|
|
process.
|
|
extra_attributes: Extra attributes which will be passed to the client
|
|
during successful login. Must be JSON serializable.
|
|
new_user: True if we should use wording appropriate to a user who has just
|
|
registered.
|
|
"""
|
|
# If the account has been deactivated, do not proceed with the login
|
|
# flow.
|
|
deactivated = await self.store.get_user_deactivated_status(registered_user_id)
|
|
if deactivated:
|
|
respond_with_html(request, 403, self._sso_account_deactivated_template)
|
|
return
|
|
|
|
profile = await self.store.get_profileinfo(
|
|
UserID.from_string(registered_user_id).localpart
|
|
)
|
|
|
|
self._complete_sso_login(
|
|
registered_user_id,
|
|
auth_provider_id,
|
|
request,
|
|
client_redirect_url,
|
|
extra_attributes,
|
|
new_user=new_user,
|
|
user_profile_data=profile,
|
|
)
|
|
|
|
def _complete_sso_login(
|
|
self,
|
|
registered_user_id: str,
|
|
auth_provider_id: str,
|
|
request: Request,
|
|
client_redirect_url: str,
|
|
extra_attributes: Optional[JsonDict] = None,
|
|
new_user: bool = False,
|
|
user_profile_data: Optional[ProfileInfo] = None,
|
|
):
|
|
"""
|
|
The synchronous portion of complete_sso_login.
|
|
|
|
This exists purely for backwards compatibility of synapse.module_api.ModuleApi.
|
|
"""
|
|
|
|
if user_profile_data is None:
|
|
user_profile_data = ProfileInfo(None, None)
|
|
|
|
# Store any extra attributes which will be passed in the login response.
|
|
# Note that this is per-user so it may overwrite a previous value, this
|
|
# is considered OK since the newest SSO attributes should be most valid.
|
|
if extra_attributes:
|
|
self._extra_attributes[registered_user_id] = SsoLoginExtraAttributes(
|
|
self._clock.time_msec(),
|
|
extra_attributes,
|
|
)
|
|
|
|
# Create a login token
|
|
login_token = self.macaroon_gen.generate_short_term_login_token(
|
|
registered_user_id, auth_provider_id=auth_provider_id
|
|
)
|
|
|
|
# Append the login token to the original redirect URL (i.e. with its query
|
|
# parameters kept intact) to build the URL to which the template needs to
|
|
# redirect the users once they have clicked on the confirmation link.
|
|
redirect_url = self.add_query_param_to_url(
|
|
client_redirect_url, "loginToken", login_token
|
|
)
|
|
|
|
# if the client is whitelisted, we can redirect straight to it
|
|
if client_redirect_url.startswith(self._whitelisted_sso_clients):
|
|
request.redirect(redirect_url)
|
|
finish_request(request)
|
|
return
|
|
|
|
# Otherwise, serve the redirect confirmation page.
|
|
|
|
# Remove the query parameters from the redirect URL to get a shorter version of
|
|
# it. This is only to display a human-readable URL in the template, but not the
|
|
# URL we redirect users to.
|
|
url_parts = urllib.parse.urlsplit(client_redirect_url)
|
|
|
|
if url_parts.scheme == "https":
|
|
# for an https uri, just show the netloc (ie, the hostname. Specifically,
|
|
# the bit between "//" and "/"; this includes any potential
|
|
# "username:password@" prefix.)
|
|
display_url = url_parts.netloc
|
|
else:
|
|
# for other uris, strip the query-params (including the login token) and
|
|
# fragment.
|
|
display_url = urllib.parse.urlunsplit(
|
|
(url_parts.scheme, url_parts.netloc, url_parts.path, "", "")
|
|
)
|
|
|
|
html = self._sso_redirect_confirm_template.render(
|
|
display_url=display_url,
|
|
redirect_url=redirect_url,
|
|
server_name=self._server_name,
|
|
new_user=new_user,
|
|
user_id=registered_user_id,
|
|
user_profile=user_profile_data,
|
|
)
|
|
respond_with_html(request, 200, html)
|
|
|
|
async def _sso_login_callback(self, login_result: JsonDict) -> None:
|
|
"""
|
|
A login callback which might add additional attributes to the login response.
|
|
|
|
Args:
|
|
login_result: The data to be sent to the client. Includes the user
|
|
ID and access token.
|
|
"""
|
|
# Expire attributes before processing. Note that there shouldn't be any
|
|
# valid logins that still have extra attributes.
|
|
self._expire_sso_extra_attributes()
|
|
|
|
extra_attributes = self._extra_attributes.get(login_result["user_id"])
|
|
if extra_attributes:
|
|
login_result.update(extra_attributes.extra_attributes)
|
|
|
|
def _expire_sso_extra_attributes(self) -> None:
|
|
"""
|
|
Iterate through the mapping of user IDs to extra attributes and remove any that are no longer valid.
|
|
"""
|
|
# TODO This should match the amount of time the macaroon is valid for.
|
|
LOGIN_TOKEN_EXPIRATION_TIME = 2 * 60 * 1000
|
|
expire_before = self._clock.time_msec() - LOGIN_TOKEN_EXPIRATION_TIME
|
|
to_expire = set()
|
|
for user_id, data in self._extra_attributes.items():
|
|
if data.creation_time < expire_before:
|
|
to_expire.add(user_id)
|
|
for user_id in to_expire:
|
|
logger.debug("Expiring extra attributes for user %s", user_id)
|
|
del self._extra_attributes[user_id]
|
|
|
|
@staticmethod
|
|
def add_query_param_to_url(url: str, param_name: str, param: Any):
|
|
url_parts = list(urllib.parse.urlparse(url))
|
|
query = urllib.parse.parse_qsl(url_parts[4], keep_blank_values=True)
|
|
query.append((param_name, param))
|
|
url_parts[4] = urllib.parse.urlencode(query)
|
|
return urllib.parse.urlunparse(url_parts)
|
|
|
|
|
|
@attr.s(slots=True)
|
|
class MacaroonGenerator:
|
|
|
|
hs = attr.ib()
|
|
|
|
def generate_access_token(
|
|
self, user_id: str, extra_caveats: Optional[List[str]] = None
|
|
) -> str:
|
|
extra_caveats = extra_caveats or []
|
|
macaroon = self._generate_base_macaroon(user_id)
|
|
macaroon.add_first_party_caveat("type = access")
|
|
# Include a nonce, to make sure that each login gets a different
|
|
# access token.
|
|
macaroon.add_first_party_caveat(
|
|
"nonce = %s" % (stringutils.random_string_with_symbols(16),)
|
|
)
|
|
for caveat in extra_caveats:
|
|
macaroon.add_first_party_caveat(caveat)
|
|
return macaroon.serialize()
|
|
|
|
def generate_short_term_login_token(
|
|
self,
|
|
user_id: str,
|
|
auth_provider_id: str,
|
|
duration_in_ms: int = (2 * 60 * 1000),
|
|
) -> str:
|
|
macaroon = self._generate_base_macaroon(user_id)
|
|
macaroon.add_first_party_caveat("type = login")
|
|
now = self.hs.get_clock().time_msec()
|
|
expiry = now + duration_in_ms
|
|
macaroon.add_first_party_caveat("time < %d" % (expiry,))
|
|
macaroon.add_first_party_caveat("auth_provider_id = %s" % (auth_provider_id,))
|
|
return macaroon.serialize()
|
|
|
|
def verify_short_term_login_token(self, token: str) -> LoginTokenAttributes:
|
|
"""Verify a short-term-login macaroon
|
|
|
|
Checks that the given token is a valid, unexpired short-term-login token
|
|
minted by this server.
|
|
|
|
Args:
|
|
token: the login token to verify
|
|
|
|
Returns:
|
|
the user_id that this token is valid for
|
|
|
|
Raises:
|
|
MacaroonVerificationFailedException if the verification failed
|
|
"""
|
|
macaroon = pymacaroons.Macaroon.deserialize(token)
|
|
user_id = get_value_from_macaroon(macaroon, "user_id")
|
|
auth_provider_id = get_value_from_macaroon(macaroon, "auth_provider_id")
|
|
|
|
v = pymacaroons.Verifier()
|
|
v.satisfy_exact("gen = 1")
|
|
v.satisfy_exact("type = login")
|
|
v.satisfy_general(lambda c: c.startswith("user_id = "))
|
|
v.satisfy_general(lambda c: c.startswith("auth_provider_id = "))
|
|
satisfy_expiry(v, self.hs.get_clock().time_msec)
|
|
v.verify(macaroon, self.hs.config.key.macaroon_secret_key)
|
|
|
|
return LoginTokenAttributes(user_id=user_id, auth_provider_id=auth_provider_id)
|
|
|
|
def generate_delete_pusher_token(self, user_id: str) -> str:
|
|
macaroon = self._generate_base_macaroon(user_id)
|
|
macaroon.add_first_party_caveat("type = delete_pusher")
|
|
return macaroon.serialize()
|
|
|
|
def _generate_base_macaroon(self, user_id: str) -> pymacaroons.Macaroon:
|
|
macaroon = pymacaroons.Macaroon(
|
|
location=self.hs.config.server_name,
|
|
identifier="key",
|
|
key=self.hs.config.macaroon_secret_key,
|
|
)
|
|
macaroon.add_first_party_caveat("gen = 1")
|
|
macaroon.add_first_party_caveat("user_id = %s" % (user_id,))
|
|
return macaroon
|
|
|
|
|
|
class PasswordProvider:
|
|
"""Wrapper for a password auth provider module
|
|
|
|
This class abstracts out all of the backwards-compatibility hacks for
|
|
password providers, to provide a consistent interface.
|
|
"""
|
|
|
|
@classmethod
|
|
def load(cls, module, config, module_api: ModuleApi) -> "PasswordProvider":
|
|
try:
|
|
pp = module(config=config, account_handler=module_api)
|
|
except Exception as e:
|
|
logger.error("Error while initializing %r: %s", module, e)
|
|
raise
|
|
return cls(pp, module_api)
|
|
|
|
def __init__(self, pp, module_api: ModuleApi):
|
|
self._pp = pp
|
|
self._module_api = module_api
|
|
|
|
self._supported_login_types = {}
|
|
|
|
# grandfather in check_password support
|
|
if hasattr(self._pp, "check_password"):
|
|
self._supported_login_types[LoginType.PASSWORD] = ("password",)
|
|
|
|
g = getattr(self._pp, "get_supported_login_types", None)
|
|
if g:
|
|
self._supported_login_types.update(g())
|
|
|
|
def __str__(self):
|
|
return str(self._pp)
|
|
|
|
def get_supported_login_types(self) -> Mapping[str, Iterable[str]]:
|
|
"""Get the login types supported by this password provider
|
|
|
|
Returns a map from a login type identifier (such as m.login.password) to an
|
|
iterable giving the fields which must be provided by the user in the submission
|
|
to the /login API.
|
|
|
|
This wrapper adds m.login.password to the list if the underlying password
|
|
provider supports the check_password() api.
|
|
"""
|
|
return self._supported_login_types
|
|
|
|
async def check_auth(
|
|
self, username: str, login_type: str, login_dict: JsonDict
|
|
) -> Optional[Tuple[str, Optional[Callable]]]:
|
|
"""Check if the user has presented valid login credentials
|
|
|
|
This wrapper also calls check_password() if the underlying password provider
|
|
supports the check_password() api and the login type is m.login.password.
|
|
|
|
Args:
|
|
username: user id presented by the client. Either an MXID or an unqualified
|
|
username.
|
|
|
|
login_type: the login type being attempted - one of the types returned by
|
|
get_supported_login_types()
|
|
|
|
login_dict: the dictionary of login secrets passed by the client.
|
|
|
|
Returns: (user_id, callback) where `user_id` is the fully-qualified mxid of the
|
|
user, and `callback` is an optional callback which will be called with the
|
|
result from the /login call (including access_token, device_id, etc.)
|
|
"""
|
|
# first grandfather in a call to check_password
|
|
if login_type == LoginType.PASSWORD:
|
|
g = getattr(self._pp, "check_password", None)
|
|
if g:
|
|
qualified_user_id = self._module_api.get_qualified_user_id(username)
|
|
is_valid = await self._pp.check_password(
|
|
qualified_user_id, login_dict["password"]
|
|
)
|
|
if is_valid:
|
|
return qualified_user_id, None
|
|
|
|
g = getattr(self._pp, "check_auth", None)
|
|
if not g:
|
|
return None
|
|
result = await g(username, login_type, login_dict)
|
|
|
|
# Check if the return value is a str or a tuple
|
|
if isinstance(result, str):
|
|
# If it's a str, set callback function to None
|
|
return result, None
|
|
|
|
return result
|
|
|
|
async def check_3pid_auth(
|
|
self, medium: str, address: str, password: str
|
|
) -> Optional[Tuple[str, Optional[Callable]]]:
|
|
g = getattr(self._pp, "check_3pid_auth", None)
|
|
if not g:
|
|
return None
|
|
|
|
# This function is able to return a deferred that either
|
|
# resolves None, meaning authentication failure, or upon
|
|
# success, to a str (which is the user_id) or a tuple of
|
|
# (user_id, callback_func), where callback_func should be run
|
|
# after we've finished everything else
|
|
result = await g(medium, address, password)
|
|
|
|
# Check if the return value is a str or a tuple
|
|
if isinstance(result, str):
|
|
# If it's a str, set callback function to None
|
|
return result, None
|
|
|
|
return result
|
|
|
|
async def on_logged_out(
|
|
self, user_id: str, device_id: Optional[str], access_token: str
|
|
) -> None:
|
|
g = getattr(self._pp, "on_logged_out", None)
|
|
if not g:
|
|
return
|
|
|
|
# This might return an awaitable, if it does block the log out
|
|
# until it completes.
|
|
await maybe_awaitable(
|
|
g(
|
|
user_id=user_id,
|
|
device_id=device_id,
|
|
access_token=access_token,
|
|
)
|
|
)
|