mirror of
https://mau.dev/maunium/synapse.git
synced 2024-10-01 01:36:05 -04:00
579 lines
22 KiB
Python
579 lines
22 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2015 - 2016 OpenMarket Ltd
|
|
# Copyright 2017 Vector Creations Ltd
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
import hmac
|
|
import logging
|
|
from hashlib import sha1
|
|
|
|
from six import string_types
|
|
|
|
from twisted.internet import defer
|
|
|
|
import synapse
|
|
import synapse.types
|
|
from synapse.api.constants import LoginType
|
|
from synapse.api.errors import (
|
|
Codes,
|
|
LimitExceededError,
|
|
SynapseError,
|
|
UnrecognizedRequestError,
|
|
)
|
|
from synapse.config.server import is_threepid_reserved
|
|
from synapse.http.servlet import (
|
|
RestServlet,
|
|
assert_params_in_dict,
|
|
parse_json_object_from_request,
|
|
parse_string,
|
|
)
|
|
from synapse.util.msisdn import phone_number_to_msisdn
|
|
from synapse.util.ratelimitutils import FederationRateLimiter
|
|
from synapse.util.threepids import check_3pid_allowed
|
|
|
|
from ._base import client_v2_patterns, interactive_auth_handler
|
|
|
|
# We ought to be using hmac.compare_digest() but on older pythons it doesn't
|
|
# exist. It's a _really minor_ security flaw to use plain string comparison
|
|
# because the timing attack is so obscured by all the other code here it's
|
|
# unlikely to make much difference
|
|
if hasattr(hmac, "compare_digest"):
|
|
compare_digest = hmac.compare_digest
|
|
else:
|
|
def compare_digest(a, b):
|
|
return a == b
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class EmailRegisterRequestTokenRestServlet(RestServlet):
|
|
PATTERNS = client_v2_patterns("/register/email/requestToken$")
|
|
|
|
def __init__(self, hs):
|
|
"""
|
|
Args:
|
|
hs (synapse.server.HomeServer): server
|
|
"""
|
|
super(EmailRegisterRequestTokenRestServlet, self).__init__()
|
|
self.hs = hs
|
|
self.identity_handler = hs.get_handlers().identity_handler
|
|
|
|
@defer.inlineCallbacks
|
|
def on_POST(self, request):
|
|
body = parse_json_object_from_request(request)
|
|
|
|
assert_params_in_dict(body, [
|
|
'id_server', 'client_secret', 'email', 'send_attempt'
|
|
])
|
|
|
|
if not check_3pid_allowed(self.hs, "email", body['email']):
|
|
raise SynapseError(
|
|
403,
|
|
"Your email domain is not authorized to register on this server",
|
|
Codes.THREEPID_DENIED,
|
|
)
|
|
|
|
existingUid = yield self.hs.get_datastore().get_user_id_by_threepid(
|
|
'email', body['email']
|
|
)
|
|
|
|
if existingUid is not None:
|
|
raise SynapseError(400, "Email is already in use", Codes.THREEPID_IN_USE)
|
|
|
|
ret = yield self.identity_handler.requestEmailToken(**body)
|
|
defer.returnValue((200, ret))
|
|
|
|
|
|
class MsisdnRegisterRequestTokenRestServlet(RestServlet):
|
|
PATTERNS = client_v2_patterns("/register/msisdn/requestToken$")
|
|
|
|
def __init__(self, hs):
|
|
"""
|
|
Args:
|
|
hs (synapse.server.HomeServer): server
|
|
"""
|
|
super(MsisdnRegisterRequestTokenRestServlet, self).__init__()
|
|
self.hs = hs
|
|
self.identity_handler = hs.get_handlers().identity_handler
|
|
|
|
@defer.inlineCallbacks
|
|
def on_POST(self, request):
|
|
body = parse_json_object_from_request(request)
|
|
|
|
assert_params_in_dict(body, [
|
|
'id_server', 'client_secret',
|
|
'country', 'phone_number',
|
|
'send_attempt',
|
|
])
|
|
|
|
msisdn = phone_number_to_msisdn(body['country'], body['phone_number'])
|
|
|
|
if not check_3pid_allowed(self.hs, "msisdn", msisdn):
|
|
raise SynapseError(
|
|
403,
|
|
"Phone numbers are not authorized to register on this server",
|
|
Codes.THREEPID_DENIED,
|
|
)
|
|
|
|
existingUid = yield self.hs.get_datastore().get_user_id_by_threepid(
|
|
'msisdn', msisdn
|
|
)
|
|
|
|
if existingUid is not None:
|
|
raise SynapseError(
|
|
400, "Phone number is already in use", Codes.THREEPID_IN_USE
|
|
)
|
|
|
|
ret = yield self.identity_handler.requestMsisdnToken(**body)
|
|
defer.returnValue((200, ret))
|
|
|
|
|
|
class UsernameAvailabilityRestServlet(RestServlet):
|
|
PATTERNS = client_v2_patterns("/register/available")
|
|
|
|
def __init__(self, hs):
|
|
"""
|
|
Args:
|
|
hs (synapse.server.HomeServer): server
|
|
"""
|
|
super(UsernameAvailabilityRestServlet, self).__init__()
|
|
self.hs = hs
|
|
self.registration_handler = hs.get_registration_handler()
|
|
self.ratelimiter = FederationRateLimiter(
|
|
hs.get_clock(),
|
|
# Time window of 2s
|
|
window_size=2000,
|
|
# Artificially delay requests if rate > sleep_limit/window_size
|
|
sleep_limit=1,
|
|
# Amount of artificial delay to apply
|
|
sleep_msec=1000,
|
|
# Error with 429 if more than reject_limit requests are queued
|
|
reject_limit=1,
|
|
# Allow 1 request at a time
|
|
concurrent_requests=1,
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def on_GET(self, request):
|
|
ip = self.hs.get_ip_from_request(request)
|
|
with self.ratelimiter.ratelimit(ip) as wait_deferred:
|
|
yield wait_deferred
|
|
|
|
username = parse_string(request, "username", required=True)
|
|
|
|
yield self.registration_handler.check_username(username)
|
|
|
|
defer.returnValue((200, {"available": True}))
|
|
|
|
|
|
class RegisterRestServlet(RestServlet):
|
|
PATTERNS = client_v2_patterns("/register$")
|
|
|
|
def __init__(self, hs):
|
|
"""
|
|
Args:
|
|
hs (synapse.server.HomeServer): server
|
|
"""
|
|
super(RegisterRestServlet, self).__init__()
|
|
|
|
self.hs = hs
|
|
self.auth = hs.get_auth()
|
|
self.store = hs.get_datastore()
|
|
self.auth_handler = hs.get_auth_handler()
|
|
self.registration_handler = hs.get_registration_handler()
|
|
self.identity_handler = hs.get_handlers().identity_handler
|
|
self.room_member_handler = hs.get_room_member_handler()
|
|
self.macaroon_gen = hs.get_macaroon_generator()
|
|
self.ratelimiter = hs.get_registration_ratelimiter()
|
|
self.clock = hs.get_clock()
|
|
|
|
@interactive_auth_handler
|
|
@defer.inlineCallbacks
|
|
def on_POST(self, request):
|
|
body = parse_json_object_from_request(request)
|
|
|
|
client_addr = request.getClientIP()
|
|
|
|
time_now = self.clock.time()
|
|
|
|
allowed, time_allowed = self.ratelimiter.can_do_action(
|
|
client_addr, time_now_s=time_now,
|
|
rate_hz=self.hs.config.rc_registration.per_second,
|
|
burst_count=self.hs.config.rc_registration.burst_count,
|
|
update=False,
|
|
)
|
|
|
|
if not allowed:
|
|
raise LimitExceededError(
|
|
retry_after_ms=int(1000 * (time_allowed - time_now)),
|
|
)
|
|
|
|
kind = b"user"
|
|
if b"kind" in request.args:
|
|
kind = request.args[b"kind"][0]
|
|
|
|
if kind == b"guest":
|
|
ret = yield self._do_guest_registration(body, address=client_addr)
|
|
defer.returnValue(ret)
|
|
return
|
|
elif kind != b"user":
|
|
raise UnrecognizedRequestError(
|
|
"Do not understand membership kind: %s" % (kind,)
|
|
)
|
|
|
|
# we do basic sanity checks here because the auth layer will store these
|
|
# in sessions. Pull out the username/password provided to us.
|
|
desired_password = None
|
|
if 'password' in body:
|
|
if (not isinstance(body['password'], string_types) or
|
|
len(body['password']) > 512):
|
|
raise SynapseError(400, "Invalid password")
|
|
desired_password = body["password"]
|
|
|
|
desired_username = None
|
|
if 'username' in body:
|
|
if (not isinstance(body['username'], string_types) or
|
|
len(body['username']) > 512):
|
|
raise SynapseError(400, "Invalid username")
|
|
desired_username = body['username']
|
|
|
|
appservice = None
|
|
if self.auth.has_access_token(request):
|
|
appservice = yield self.auth.get_appservice_by_req(request)
|
|
|
|
# fork off as soon as possible for ASes and shared secret auth which
|
|
# have completely different registration flows to normal users
|
|
|
|
# == Application Service Registration ==
|
|
if appservice:
|
|
# Set the desired user according to the AS API (which uses the
|
|
# 'user' key not 'username'). Since this is a new addition, we'll
|
|
# fallback to 'username' if they gave one.
|
|
desired_username = body.get("user", desired_username)
|
|
|
|
# XXX we should check that desired_username is valid. Currently
|
|
# we give appservices carte blanche for any insanity in mxids,
|
|
# because the IRC bridges rely on being able to register stupid
|
|
# IDs.
|
|
|
|
access_token = self.auth.get_access_token_from_request(request)
|
|
|
|
if isinstance(desired_username, string_types):
|
|
result = yield self._do_appservice_registration(
|
|
desired_username, access_token, body
|
|
)
|
|
defer.returnValue((200, result)) # we throw for non 200 responses
|
|
return
|
|
|
|
# for either shared secret or regular registration, downcase the
|
|
# provided username before attempting to register it. This should mean
|
|
# that people who try to register with upper-case in their usernames
|
|
# don't get a nasty surprise. (Note that we treat username
|
|
# case-insenstively in login, so they are free to carry on imagining
|
|
# that their username is CrAzYh4cKeR if that keeps them happy)
|
|
if desired_username is not None:
|
|
desired_username = desired_username.lower()
|
|
|
|
# == Shared Secret Registration == (e.g. create new user scripts)
|
|
if 'mac' in body:
|
|
# FIXME: Should we really be determining if this is shared secret
|
|
# auth based purely on the 'mac' key?
|
|
result = yield self._do_shared_secret_registration(
|
|
desired_username, desired_password, body
|
|
)
|
|
defer.returnValue((200, result)) # we throw for non 200 responses
|
|
return
|
|
|
|
# == Normal User Registration == (everyone else)
|
|
if not self.hs.config.enable_registration:
|
|
raise SynapseError(403, "Registration has been disabled")
|
|
|
|
guest_access_token = body.get("guest_access_token", None)
|
|
|
|
if (
|
|
'initial_device_display_name' in body and
|
|
'password' not in body
|
|
):
|
|
# ignore 'initial_device_display_name' if sent without
|
|
# a password to work around a client bug where it sent
|
|
# the 'initial_device_display_name' param alone, wiping out
|
|
# the original registration params
|
|
logger.warn("Ignoring initial_device_display_name without password")
|
|
del body['initial_device_display_name']
|
|
|
|
session_id = self.auth_handler.get_session_id(body)
|
|
registered_user_id = None
|
|
if session_id:
|
|
# if we get a registered user id out of here, it means we previously
|
|
# registered a user for this session, so we could just return the
|
|
# user here. We carry on and go through the auth checks though,
|
|
# for paranoia.
|
|
registered_user_id = self.auth_handler.get_session_data(
|
|
session_id, "registered_user_id", None
|
|
)
|
|
|
|
if desired_username is not None:
|
|
yield self.registration_handler.check_username(
|
|
desired_username,
|
|
guest_access_token=guest_access_token,
|
|
assigned_user_id=registered_user_id,
|
|
)
|
|
|
|
# FIXME: need a better error than "no auth flow found" for scenarios
|
|
# where we required 3PID for registration but the user didn't give one
|
|
require_email = 'email' in self.hs.config.registrations_require_3pid
|
|
require_msisdn = 'msisdn' in self.hs.config.registrations_require_3pid
|
|
|
|
show_msisdn = True
|
|
if self.hs.config.disable_msisdn_registration:
|
|
show_msisdn = False
|
|
require_msisdn = False
|
|
|
|
flows = []
|
|
if self.hs.config.enable_registration_captcha:
|
|
# only support 3PIDless registration if no 3PIDs are required
|
|
if not require_email and not require_msisdn:
|
|
flows.extend([[LoginType.RECAPTCHA]])
|
|
# only support the email-only flow if we don't require MSISDN 3PIDs
|
|
if not require_msisdn:
|
|
flows.extend([[LoginType.EMAIL_IDENTITY, LoginType.RECAPTCHA]])
|
|
|
|
if show_msisdn:
|
|
# only support the MSISDN-only flow if we don't require email 3PIDs
|
|
if not require_email:
|
|
flows.extend([[LoginType.MSISDN, LoginType.RECAPTCHA]])
|
|
# always let users provide both MSISDN & email
|
|
flows.extend([
|
|
[LoginType.MSISDN, LoginType.EMAIL_IDENTITY, LoginType.RECAPTCHA],
|
|
])
|
|
else:
|
|
# only support 3PIDless registration if no 3PIDs are required
|
|
if not require_email and not require_msisdn:
|
|
flows.extend([[LoginType.DUMMY]])
|
|
# only support the email-only flow if we don't require MSISDN 3PIDs
|
|
if not require_msisdn:
|
|
flows.extend([[LoginType.EMAIL_IDENTITY]])
|
|
|
|
if show_msisdn:
|
|
# only support the MSISDN-only flow if we don't require email 3PIDs
|
|
if not require_email or require_msisdn:
|
|
flows.extend([[LoginType.MSISDN]])
|
|
# always let users provide both MSISDN & email
|
|
flows.extend([
|
|
[LoginType.MSISDN, LoginType.EMAIL_IDENTITY]
|
|
])
|
|
|
|
# Append m.login.terms to all flows if we're requiring consent
|
|
if self.hs.config.user_consent_at_registration:
|
|
new_flows = []
|
|
for flow in flows:
|
|
flow.append(LoginType.TERMS)
|
|
flows.extend(new_flows)
|
|
|
|
auth_result, params, session_id = yield self.auth_handler.check_auth(
|
|
flows, body, self.hs.get_ip_from_request(request)
|
|
)
|
|
|
|
# Check that we're not trying to register a denied 3pid.
|
|
#
|
|
# the user-facing checks will probably already have happened in
|
|
# /register/email/requestToken when we requested a 3pid, but that's not
|
|
# guaranteed.
|
|
|
|
if auth_result:
|
|
for login_type in [LoginType.EMAIL_IDENTITY, LoginType.MSISDN]:
|
|
if login_type in auth_result:
|
|
medium = auth_result[login_type]['medium']
|
|
address = auth_result[login_type]['address']
|
|
|
|
if not check_3pid_allowed(self.hs, medium, address):
|
|
raise SynapseError(
|
|
403,
|
|
"Third party identifiers (email/phone numbers)" +
|
|
" are not authorized on this server",
|
|
Codes.THREEPID_DENIED,
|
|
)
|
|
|
|
if registered_user_id is not None:
|
|
logger.info(
|
|
"Already registered user ID %r for this session",
|
|
registered_user_id
|
|
)
|
|
# don't re-register the threepids
|
|
registered = False
|
|
else:
|
|
# NB: This may be from the auth handler and NOT from the POST
|
|
assert_params_in_dict(params, ["password"])
|
|
|
|
desired_username = params.get("username", None)
|
|
guest_access_token = params.get("guest_access_token", None)
|
|
new_password = params.get("password", None)
|
|
|
|
if desired_username is not None:
|
|
desired_username = desired_username.lower()
|
|
|
|
threepid = None
|
|
if auth_result:
|
|
threepid = auth_result.get(LoginType.EMAIL_IDENTITY)
|
|
|
|
(registered_user_id, _) = yield self.registration_handler.register(
|
|
localpart=desired_username,
|
|
password=new_password,
|
|
guest_access_token=guest_access_token,
|
|
generate_token=False,
|
|
threepid=threepid,
|
|
address=client_addr,
|
|
)
|
|
# Necessary due to auth checks prior to the threepid being
|
|
# written to the db
|
|
if threepid:
|
|
if is_threepid_reserved(
|
|
self.hs.config.mau_limits_reserved_threepids, threepid
|
|
):
|
|
yield self.store.upsert_monthly_active_user(registered_user_id)
|
|
|
|
# remember that we've now registered that user account, and with
|
|
# what user ID (since the user may not have specified)
|
|
self.auth_handler.set_session_data(
|
|
session_id, "registered_user_id", registered_user_id
|
|
)
|
|
|
|
registered = True
|
|
|
|
return_dict = yield self._create_registration_details(
|
|
registered_user_id, params
|
|
)
|
|
|
|
if registered:
|
|
yield self.registration_handler.post_registration_actions(
|
|
user_id=registered_user_id,
|
|
auth_result=auth_result,
|
|
access_token=return_dict.get("access_token"),
|
|
bind_email=params.get("bind_email"),
|
|
bind_msisdn=params.get("bind_msisdn"),
|
|
)
|
|
|
|
defer.returnValue((200, return_dict))
|
|
|
|
def on_OPTIONS(self, _):
|
|
return 200, {}
|
|
|
|
@defer.inlineCallbacks
|
|
def _do_appservice_registration(self, username, as_token, body):
|
|
user_id = yield self.registration_handler.appservice_register(
|
|
username, as_token
|
|
)
|
|
defer.returnValue((yield self._create_registration_details(user_id, body)))
|
|
|
|
@defer.inlineCallbacks
|
|
def _do_shared_secret_registration(self, username, password, body):
|
|
if not self.hs.config.registration_shared_secret:
|
|
raise SynapseError(400, "Shared secret registration is not enabled")
|
|
if not username:
|
|
raise SynapseError(
|
|
400, "username must be specified", errcode=Codes.BAD_JSON,
|
|
)
|
|
|
|
# use the username from the original request rather than the
|
|
# downcased one in `username` for the mac calculation
|
|
user = body["username"].encode("utf-8")
|
|
|
|
# str() because otherwise hmac complains that 'unicode' does not
|
|
# have the buffer interface
|
|
got_mac = str(body["mac"])
|
|
|
|
# FIXME this is different to the /v1/register endpoint, which
|
|
# includes the password and admin flag in the hashed text. Why are
|
|
# these different?
|
|
want_mac = hmac.new(
|
|
key=self.hs.config.registration_shared_secret.encode(),
|
|
msg=user,
|
|
digestmod=sha1,
|
|
).hexdigest()
|
|
|
|
if not compare_digest(want_mac, got_mac):
|
|
raise SynapseError(
|
|
403, "HMAC incorrect",
|
|
)
|
|
|
|
(user_id, _) = yield self.registration_handler.register(
|
|
localpart=username, password=password, generate_token=False,
|
|
)
|
|
|
|
result = yield self._create_registration_details(user_id, body)
|
|
defer.returnValue(result)
|
|
|
|
@defer.inlineCallbacks
|
|
def _create_registration_details(self, user_id, params):
|
|
"""Complete registration of newly-registered user
|
|
|
|
Allocates device_id if one was not given; also creates access_token.
|
|
|
|
Args:
|
|
(str) user_id: full canonical @user:id
|
|
(object) params: registration parameters, from which we pull
|
|
device_id, initial_device_name and inhibit_login
|
|
Returns:
|
|
defer.Deferred: (object) dictionary for response from /register
|
|
"""
|
|
result = {
|
|
"user_id": user_id,
|
|
"home_server": self.hs.hostname,
|
|
}
|
|
if not params.get("inhibit_login", False):
|
|
device_id = params.get("device_id")
|
|
initial_display_name = params.get("initial_device_display_name")
|
|
device_id, access_token = yield self.registration_handler.register_device(
|
|
user_id, device_id, initial_display_name, is_guest=False,
|
|
)
|
|
|
|
result.update({
|
|
"access_token": access_token,
|
|
"device_id": device_id,
|
|
})
|
|
defer.returnValue(result)
|
|
|
|
@defer.inlineCallbacks
|
|
def _do_guest_registration(self, params, address=None):
|
|
if not self.hs.config.allow_guest_access:
|
|
raise SynapseError(403, "Guest access is disabled")
|
|
user_id, _ = yield self.registration_handler.register(
|
|
generate_token=False,
|
|
make_guest=True,
|
|
address=address,
|
|
)
|
|
|
|
# we don't allow guests to specify their own device_id, because
|
|
# we have nowhere to store it.
|
|
device_id = synapse.api.auth.GUEST_DEVICE_ID
|
|
initial_display_name = params.get("initial_device_display_name")
|
|
device_id, access_token = yield self.registration_handler.register_device(
|
|
user_id, device_id, initial_display_name, is_guest=True,
|
|
)
|
|
|
|
defer.returnValue((200, {
|
|
"user_id": user_id,
|
|
"device_id": device_id,
|
|
"access_token": access_token,
|
|
"home_server": self.hs.hostname,
|
|
}))
|
|
|
|
|
|
def register_servlets(hs, http_server):
|
|
EmailRegisterRequestTokenRestServlet(hs).register(http_server)
|
|
MsisdnRegisterRequestTokenRestServlet(hs).register(http_server)
|
|
UsernameAvailabilityRestServlet(hs).register(http_server)
|
|
RegisterRestServlet(hs).register(http_server)
|