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# -*- 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
from twisted.internet import defer
logger = logging.getLogger(__name__)
@defer.inlineCallbacks
def check_3pid_allowed(hs, medium, address):
"""Checks whether a given 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
Returns:
defered bool: whether the 3PID medium/address is allowed to be added to this HS
"""
if hs.config.check_is_for_allowed_local_3pids:
data = yield hs.get_simple_http_client().get_json(
"https://%s%s"
% (
hs.config.check_is_for_allowed_local_3pids,
"/_matrix/identity/api/v1/internal-info",
),
{"medium": medium, "address": address},
)
# Check for invalid response
if "hs" not in data and "shadow_hs" not in data:
defer.returnValue(False)
# Check if this user is intended to register for this homeserver
if (
data.get("hs") != hs.config.server_name
and data.get("shadow_hs") != hs.config.server_name
):
defer.returnValue(False)
if data.get("requires_invite", False) and not data.get("invited", False):
# Requires an invite but hasn't been invited
defer.returnValue(False)
defer.returnValue(True)
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
):
defer.returnValue(True)
else:
defer.returnValue(True)
defer.returnValue(False)
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