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# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket Ltd
# Copyright 2017 Vector Creations Ltd
# 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.
"""Utilities for interacting with Identity Servers"""
import logging
from canonicaljson import json
from twisted.internet import defer
from synapse.api.errors import (
CodeMessageException,
Codes,
HttpResponseException,
SynapseError,
)
from ._base import BaseHandler
logger = logging.getLogger(__name__)
class IdentityHandler(BaseHandler):
def __init__(self, hs):
super(IdentityHandler, self).__init__(hs)
self.http_client = hs.get_simple_http_client()
self.federation_http_client = hs.get_http_client()
self.trusted_id_servers = set(hs.config.trusted_third_party_id_servers)
self.trust_any_id_server_just_for_testing_do_not_use = (
hs.config.use_insecure_ssl_client_just_for_testing_do_not_use
)
def _should_trust_id_server(self, id_server):
if id_server not in self.trusted_id_servers:
if self.trust_any_id_server_just_for_testing_do_not_use:
logger.warn(
"Trusting untrustworthy ID server %r even though it isn't"
" in the trusted id list for testing because"
" 'use_insecure_ssl_client_just_for_testing_do_not_use'"
" is set in the config",
id_server,
)
else:
return False
return True
@defer.inlineCallbacks
def threepid_from_creds(self, creds):
if 'id_server' in creds:
id_server = creds['id_server']
elif 'idServer' in creds:
id_server = creds['idServer']
else:
raise SynapseError(400, "No id_server in creds")
if 'client_secret' in creds:
client_secret = creds['client_secret']
elif 'clientSecret' in creds:
client_secret = creds['clientSecret']
else:
raise SynapseError(400, "No client_secret in creds")
if not self._should_trust_id_server(id_server):
logger.warn(
'%s is not a trusted ID server: rejecting 3pid ' +
'credentials', id_server
)
defer.returnValue(None)
try:
data = yield self.http_client.get_json(
"https://%s%s" % (
id_server,
"/_matrix/identity/api/v1/3pid/getValidated3pid"
),
{'sid': creds['sid'], 'client_secret': client_secret}
)
except HttpResponseException as e:
logger.info("getValidated3pid failed with Matrix error: %r", e)
raise e.to_synapse_error()
if 'medium' in data:
defer.returnValue(data)
defer.returnValue(None)
@defer.inlineCallbacks
def bind_threepid(self, creds, mxid):
logger.debug("binding threepid %r to %s", creds, mxid)
data = None
if 'id_server' in creds:
id_server = creds['id_server']
elif 'idServer' in creds:
id_server = creds['idServer']
else:
raise SynapseError(400, "No id_server in creds")
if 'client_secret' in creds:
client_secret = creds['client_secret']
elif 'clientSecret' in creds:
client_secret = creds['clientSecret']
else:
raise SynapseError(400, "No client_secret in creds")
try:
data = yield self.http_client.post_urlencoded_get_json(
"https://%s%s" % (
id_server, "/_matrix/identity/api/v1/3pid/bind"
),
{
'sid': creds['sid'],
'client_secret': client_secret,
'mxid': mxid,
}
)
logger.debug("bound threepid %r to %s", creds, mxid)
except CodeMessageException as e:
data = json.loads(e.msg) # XXX WAT?
defer.returnValue(data)
@defer.inlineCallbacks
def try_unbind_threepid(self, mxid, threepid):
"""Removes a binding from an identity server
Args:
mxid (str): Matrix user ID of binding to be removed
threepid (dict): Dict with medium & address of binding to be removed
Raises:
SynapseError: If we failed to contact the identity server
Returns:
Deferred[bool]: True on success, otherwise False if the identity
server doesn't support unbinding
"""
logger.debug("unbinding threepid %r from %s", threepid, mxid)
if not self.trusted_id_servers:
logger.warn("Can't unbind threepid: no trusted ID servers set in config")
defer.returnValue(False)
# We don't track what ID server we added 3pids on (perhaps we ought to)
# but we assume that any of the servers in the trusted list are in the
# same ID server federation, so we can pick any one of them to send the
# deletion request to.
id_server = next(iter(self.trusted_id_servers))
url = "https://%s/_matrix/identity/api/v1/3pid/unbind" % (id_server,)
content = {
"mxid": mxid,
"threepid": threepid,
}
# we abuse the federation http client to sign the request, but we have to send it
# using the normal http client since we don't want the SRV lookup and want normal
# 'browser-like' HTTPS.
auth_headers = self.federation_http_client.build_auth_headers(
destination=None,
method='POST',
url_bytes='/_matrix/identity/api/v1/3pid/unbind'.encode('ascii'),
content=content,
destination_is=id_server,
)
headers = {
b"Authorization": auth_headers,
}
try:
yield self.http_client.post_json_get_json(
url,
content,
headers,
)
except HttpResponseException as e:
if e.code in (400, 404, 501,):
# The remote server probably doesn't support unbinding (yet)
logger.warn("Received %d response while unbinding threepid", e.code)
defer.returnValue(False)
else:
logger.error("Failed to unbind threepid on identity server: %s", e)
raise SynapseError(502, "Failed to contact identity server")
defer.returnValue(True)
@defer.inlineCallbacks
def requestEmailToken(self, id_server, email, client_secret, send_attempt, **kwargs):
if not self._should_trust_id_server(id_server):
raise SynapseError(
400, "Untrusted ID server '%s'" % id_server,
Codes.SERVER_NOT_TRUSTED
)
params = {
'email': email,
'client_secret': client_secret,
'send_attempt': send_attempt,
}
params.update(kwargs)
try:
data = yield self.http_client.post_json_get_json(
"https://%s%s" % (
id_server,
"/_matrix/identity/api/v1/validate/email/requestToken"
),
params
)
defer.returnValue(data)
except HttpResponseException as e:
logger.info("Proxied requestToken failed: %r", e)
raise e.to_synapse_error()
@defer.inlineCallbacks
def requestMsisdnToken(
self, id_server, country, phone_number,
client_secret, send_attempt, **kwargs
):
if not self._should_trust_id_server(id_server):
raise SynapseError(
400, "Untrusted ID server '%s'" % id_server,
Codes.SERVER_NOT_TRUSTED
)
params = {
'country': country,
'phone_number': phone_number,
'client_secret': client_secret,
'send_attempt': send_attempt,
}
params.update(kwargs)
try:
data = yield self.http_client.post_json_get_json(
"https://%s%s" % (
id_server,
"/_matrix/identity/api/v1/validate/msisdn/requestToken"
),
params
)
defer.returnValue(data)
except HttpResponseException as e:
logger.info("Proxied requestToken failed: %r", e)
raise e.to_synapse_error()
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