diff options
| -rw-r--r-- | synapse/config/registration.py | 12 | ||||
| -rw-r--r-- | synapse/handlers/register.py | 15 | ||||
| -rw-r--r-- | synapse/rest/client/v1/register.py | 20 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/_base.py | 21 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/account.py | 3 | ||||
| -rw-r--r-- | synapse/rest/client/v2_alpha/register.py | 75 | ||||
| -rw-r--r-- | synapse/util/threepids.py | 45 |
7 files changed, 102 insertions, 89 deletions
diff --git a/synapse/config/registration.py b/synapse/config/registration.py index e5e4f77872..336959094b 100644 --- a/synapse/config/registration.py +++ b/synapse/config/registration.py @@ -32,6 +32,7 @@ class RegistrationConfig(Config): ) self.registrations_require_3pid = config.get("registrations_require_3pid", []) + self.allowed_local_3pids = config.get("allowed_local_3pids", []) self.registration_shared_secret = config.get("registration_shared_secret") self.bcrypt_rounds = config.get("bcrypt_rounds", 12) @@ -53,11 +54,16 @@ class RegistrationConfig(Config): # Enable registration for new users. enable_registration: False - # Mandate that registrations require a 3PID which matches one or more - # of these 3PIDs. N.B. regexp escape backslashes are doubled (once for - # YAML and once for the regexp itself) + # The user must provide all of the below types of 3PID when registering. # # registrations_require_3pid: + # - email + # - msisdn + + # Mandate that users are only allowed to associate certain formats of + # 3PIDs with accounts on this server. + # + # allowed_local_3pids: # - medium: email # pattern: ".*@matrix\\.org" # - medium: email diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py index 157ebaf251..9021d4d57f 100644 --- a/synapse/handlers/register.py +++ b/synapse/handlers/register.py @@ -15,7 +15,6 @@ """Contains functions for registering clients.""" import logging -import re from twisted.internet import defer @@ -26,6 +25,7 @@ from synapse.http.client import CaptchaServerHttpClient from synapse import types from synapse.types import UserID from synapse.util.async import run_on_reactor +from synapse.util.threepids import check_3pid_allowed from ._base import BaseHandler logger = logging.getLogger(__name__) @@ -308,15 +308,10 @@ class RegistrationHandler(BaseHandler): logger.info("got threepid with medium '%s' and address '%s'", threepid['medium'], threepid['address']) - for constraint in self.hs.config.registrations_require_3pid: - if ( - constraint['medium'] == 'email' and - threepid['medium'] == 'email' and - re.match(constraint['pattern'], threepid['address']) - ): - raise RegistrationError( - 403, "Third party identifier is not allowed" - ) + if not check_3pid_allowed(self.hs, threepid['medium'], threepid['address']): + raise RegistrationError( + 403, "Third party identifier is not allowed" + ) @defer.inlineCallbacks def bind_emails(self, user_id, threepidCreds): diff --git a/synapse/rest/client/v1/register.py b/synapse/rest/client/v1/register.py index f793542ad6..5c5fa8f7ab 100644 --- a/synapse/rest/client/v1/register.py +++ b/synapse/rest/client/v1/register.py @@ -71,22 +71,13 @@ class RegisterRestServlet(ClientV1RestServlet): def on_GET(self, request): - require_email = False - require_msisdn = False - for constraint in self.hs.config.registrations_require_3pid: - if constraint['medium'] == 'email': - require_email = True - elif constraint['medium'] == 'msisdn': - require_msisdn = True - else: - logger.warn( - "Unrecognised 3PID medium %s in registrations_require_3pid" % - constraint['medium'] - ) + require_email = 'email' in self.hs.config.registrations_require_3pid + require_msisdn = 'msisdn' in self.hs.config.registrations_require_3pid flows = [] if self.hs.config.enable_registration_captcha: - if require_email or not require_msisdn: + # only support the email-only flow if we don't require MSISDN 3PIDs + if not require_msisdn: flows.extend([ { "type": LoginType.RECAPTCHA, @@ -97,6 +88,7 @@ class RegisterRestServlet(ClientV1RestServlet): ] }, ]) + # only support 3PIDless registration if no 3PIDs are required if not require_email and not require_msisdn: flows.extend([ { @@ -105,6 +97,7 @@ class RegisterRestServlet(ClientV1RestServlet): } ]) else: + # only support the email-only flow if we don't require MSISDN 3PIDs if require_email or not require_msisdn: flows.extend([ { @@ -114,6 +107,7 @@ class RegisterRestServlet(ClientV1RestServlet): ] } ]) + # only support 3PIDless registration if no 3PIDs are required if not require_email and not require_msisdn: flows.extend([ { diff --git a/synapse/rest/client/v2_alpha/_base.py b/synapse/rest/client/v2_alpha/_base.py index b286ff0d95..77434937ff 100644 --- a/synapse/rest/client/v2_alpha/_base.py +++ b/synapse/rest/client/v2_alpha/_base.py @@ -60,27 +60,6 @@ def set_timeline_upper_limit(filter_json, filter_timeline_limit): filter_timeline_limit) -def check_3pid_allowed(hs, medium, address): - # check whether the HS has whitelisted the given 3PID - - allow = False - if hs.config.registrations_require_3pid: - for constraint in hs.config.registrations_require_3pid: - logger.debug("Checking 3PID %s (%s) against %s (%s)" % ( - address, medium, constraint['pattern'], constraint['medium'] - )) - if ( - medium == constraint['medium'] and - re.match(constraint['pattern'], address) - ): - allow = True - break - else: - allow = True - - return allow - - def interactive_auth_handler(orig): """Wraps an on_POST method to handle InteractiveAuthIncompleteErrors diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py index 2977ad439f..514bb37da1 100644 --- a/synapse/rest/client/v2_alpha/account.py +++ b/synapse/rest/client/v2_alpha/account.py @@ -26,7 +26,8 @@ from synapse.http.servlet import ( ) from synapse.util.async import run_on_reactor from synapse.util.msisdn import phone_number_to_msisdn -from ._base import client_v2_patterns, interactive_auth_handler, check_3pid_allowed +from synapse.util.threepids import check_3pid_allowed +from ._base import client_v2_patterns, interactive_auth_handler logger = logging.getLogger(__name__) diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py index 898d8b133a..c3479e29de 100644 --- a/synapse/rest/client/v2_alpha/register.py +++ b/synapse/rest/client/v2_alpha/register.py @@ -26,11 +26,11 @@ from synapse.http.servlet import ( RestServlet, parse_json_object_from_request, assert_params_in_request, parse_string ) from synapse.util.msisdn import phone_number_to_msisdn +from synapse.util.threepids import check_3pid_allowed -from ._base import client_v2_patterns, interactive_auth_handler, check_3pid_allowed +from ._base import client_v2_patterns, interactive_auth_handler import logging -import re import hmac from hashlib import sha1 from synapse.util.async import run_on_reactor @@ -316,41 +316,41 @@ class RegisterRestServlet(RestServlet): if 'x_show_msisdn' in body and body['x_show_msisdn']: show_msisdn = True - require_email = False - require_msisdn = False - for constraint in self.hs.config.registrations_require_3pid: - if constraint['medium'] == 'email': - require_email = True - elif constraint['medium'] == 'msisdn': - require_msisdn = True - else: - logger.warn( - "Unrecognised 3PID medium %s in registrations_require_3pid" % - constraint['medium'] - ) + # 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 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]]) - if require_email or not require_msisdn: + # 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: - if not require_email or require_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]]) - if require_email or not require_msisdn: + # 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] ]) @@ -359,30 +359,23 @@ class RegisterRestServlet(RestServlet): flows, body, self.hs.get_ip_from_request(request) ) - # doublecheck that we're not trying to register an denied 3pid. - # the user-facing checks should already have happened when we requested - # a 3PID token to validate them in /register/email/requestToken etc - - for constraint in self.hs.config.registrations_require_3pid: - if ( - constraint['medium'] == 'email' and - auth_result and LoginType.EMAIL_IDENTITY in auth_result and - re.match( - constraint['pattern'], - auth_result[LoginType.EMAIL_IDENTITY].threepid.address - ) - ): - raise SynapseError( - 403, "Third party identifier is not allowed", Codes.THREEPID_DENIED - ) - elif ( - constraint['medium'] == 'msisdn' and - auth_result and LoginType.MSISDN in auth_result and - re.match( - constraint['pattern'], - auth_result[LoginType.MSISDN].threepid.address - ) - ): + # 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 and + ( + LoginType.EMAIL_IDENTITY in auth_result or + LoginType.EMAIL_MSISDN in auth_result + ) + ): + medium = auth_result[LoginType.EMAIL_IDENTITY].threepid['medium'] + address = auth_result[LoginType.EMAIL_IDENTITY].threepid['address'] + + if not check_3pid_allowed(self.hs, medium, address): raise SynapseError( 403, "Third party identifier is not allowed", Codes.THREEPID_DENIED ) diff --git a/synapse/util/threepids.py b/synapse/util/threepids.py new file mode 100644 index 0000000000..e921b97796 --- /dev/null +++ b/synapse/util/threepids.py @@ -0,0 +1,45 @@ +# -*- coding: utf-8 -*- +# Copyright 2018 New Vector 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 logging +import re + +logger = logging.getLogger(__name__) + + +def check_3pid_allowed(hs, medium, address): + """Checks whether a given format of 3PID is allowed to be used on this HS + + Args: + hs (synapse.server.HomeServer): server + medium (str): 3pid medium - e.g. email, msisdn + address (str): address within that medium (e.g. "wotan@matrix.org") + msisdns need to first have been canonicalised + """ + + if hs.config.allowed_local_3pids: + for constraint in hs.config.allowed_local_3pids: + logger.debug("Checking 3PID %s (%s) against %s (%s)" % ( + address, medium, constraint['pattern'], constraint['medium'] + )) + if ( + medium == constraint['medium'] and + re.match(constraint['pattern'], address) + ): + return True + else: + return True + + return False |