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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
logger = logging.getLogger(__name__)
async 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
Returns:
bool: whether the 3PID medium/address is allowed to be added to this HS
"""
if hs.config.check_is_for_allowed_local_3pids:
data = await 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}
)
logger.info(
"Received internal-info data for medium '%s', address '%s': %s",
medium, address, data,
)
# Check for invalid response
if 'hs' not in data and 'shadow_hs' not in data:
return 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
):
logger.info(
"%s did not match %s or %s did not match %s",
data.get("hs"), hs.config.server_name,
data.get("shadow_hs"), hs.config.server_name,
)
return False
if data.get('requires_invite', False) and not data.get('invited', False):
# Requires an invite but hasn't been invited
logger.info(
"3PID check failed due to 'required_invite' = '%s' and 'invited' = '%s'",
data.get('required_invite'), data.get("invited"),
)
return False
return 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
):
return True
else:
return True
return False
def canonicalise_email(address: str) -> str:
"""'Canonicalise' email address
Case folding of local part of email address and lowercase domain part
See MSC2265, https://github.com/matrix-org/matrix-doc/pull/2265
Args:
address: email address to be canonicalised
Returns:
The canonical form of the email address
Raises:
ValueError if the address could not be parsed.
"""
address = address.strip()
parts = address.split("@")
if len(parts) != 2:
logger.debug("Couldn't parse email address %s", address)
raise ValueError("Unable to parse email address")
return parts[0].casefold() + "@" + parts[1].lower()
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