MatrixSynapse/synapse/rest/client/v2_alpha/keys.py

336 lines
11 KiB
Python

# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket 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 simplejson as json
from canonicaljson import encode_canonical_json
from twisted.internet import defer
import synapse.api.errors
import synapse.server
import synapse.types
from synapse.http.servlet import RestServlet, parse_json_object_from_request
from synapse.types import UserID
from ._base import client_v2_patterns
logger = logging.getLogger(__name__)
class KeyUploadServlet(RestServlet):
"""
POST /keys/upload HTTP/1.1
Content-Type: application/json
{
"device_keys": {
"user_id": "<user_id>",
"device_id": "<device_id>",
"valid_until_ts": <millisecond_timestamp>,
"algorithms": [
"m.olm.curve25519-aes-sha256",
]
"keys": {
"<algorithm>:<device_id>": "<key_base64>",
},
"signatures:" {
"<user_id>" {
"<algorithm>:<device_id>": "<signature_base64>"
} } },
"one_time_keys": {
"<algorithm>:<key_id>": "<key_base64>"
},
}
"""
PATTERNS = client_v2_patterns("/keys/upload(/(?P<device_id>[^/]+))?$",
releases=())
def __init__(self, hs):
"""
Args:
hs (synapse.server.HomeServer): server
"""
super(KeyUploadServlet, self).__init__()
self.store = hs.get_datastore()
self.clock = hs.get_clock()
self.auth = hs.get_auth()
self.device_handler = hs.get_device_handler()
@defer.inlineCallbacks
def on_POST(self, request, device_id):
requester = yield self.auth.get_user_by_req(request)
user_id = requester.user.to_string()
body = parse_json_object_from_request(request)
if device_id is not None:
# passing the device_id here is deprecated; however, we allow it
# for now for compatibility with older clients.
if (requester.device_id is not None and
device_id != requester.device_id):
logger.warning("Client uploading keys for a different device "
"(logged in as %s, uploading for %s)",
requester.device_id, device_id)
else:
device_id = requester.device_id
if device_id is None:
raise synapse.api.errors.SynapseError(
400,
"To upload keys, you must pass device_id when authenticating"
)
time_now = self.clock.time_msec()
# TODO: Validate the JSON to make sure it has the right keys.
device_keys = body.get("device_keys", None)
if device_keys:
logger.info(
"Updating device_keys for device %r for user %s at %d",
device_id, user_id, time_now
)
# TODO: Sign the JSON with the server key
yield self.store.set_e2e_device_keys(
user_id, device_id, time_now,
encode_canonical_json(device_keys)
)
one_time_keys = body.get("one_time_keys", None)
if one_time_keys:
logger.info(
"Adding %d one_time_keys for device %r for user %r at %d",
len(one_time_keys), device_id, user_id, time_now
)
key_list = []
for key_id, key_json in one_time_keys.items():
algorithm, key_id = key_id.split(":")
key_list.append((
algorithm, key_id, encode_canonical_json(key_json)
))
yield self.store.add_e2e_one_time_keys(
user_id, device_id, time_now, key_list
)
# the device should have been registered already, but it may have been
# deleted due to a race with a DELETE request. Or we may be using an
# old access_token without an associated device_id. Either way, we
# need to double-check the device is registered to avoid ending up with
# keys without a corresponding device.
self.device_handler.check_device_registered(
user_id, device_id, "unknown device"
)
result = yield self.store.count_e2e_one_time_keys(user_id, device_id)
defer.returnValue((200, {"one_time_key_counts": result}))
class KeyQueryServlet(RestServlet):
"""
GET /keys/query/<user_id> HTTP/1.1
GET /keys/query/<user_id>/<device_id> HTTP/1.1
POST /keys/query HTTP/1.1
Content-Type: application/json
{
"device_keys": {
"<user_id>": ["<device_id>"]
} }
HTTP/1.1 200 OK
{
"device_keys": {
"<user_id>": {
"<device_id>": {
"user_id": "<user_id>", // Duplicated to be signed
"device_id": "<device_id>", // Duplicated to be signed
"valid_until_ts": <millisecond_timestamp>,
"algorithms": [ // List of supported algorithms
"m.olm.curve25519-aes-sha256",
],
"keys": { // Must include a ed25519 signing key
"<algorithm>:<key_id>": "<key_base64>",
},
"signatures:" {
// Must be signed with device's ed25519 key
"<user_id>/<device_id>": {
"<algorithm>:<key_id>": "<signature_base64>"
}
// Must be signed by this server.
"<server_name>": {
"<algorithm>:<key_id>": "<signature_base64>"
} } } } } }
"""
PATTERNS = client_v2_patterns(
"/keys/query(?:"
"/(?P<user_id>[^/]*)(?:"
"/(?P<device_id>[^/]*)"
")?"
")?",
releases=()
)
def __init__(self, hs):
super(KeyQueryServlet, self).__init__()
self.store = hs.get_datastore()
self.auth = hs.get_auth()
self.federation = hs.get_replication_layer()
self.is_mine = hs.is_mine
@defer.inlineCallbacks
def on_POST(self, request, user_id, device_id):
yield self.auth.get_user_by_req(request)
body = parse_json_object_from_request(request)
result = yield self.handle_request(body)
defer.returnValue(result)
@defer.inlineCallbacks
def on_GET(self, request, user_id, device_id):
requester = yield self.auth.get_user_by_req(request)
auth_user_id = requester.user.to_string()
user_id = user_id if user_id else auth_user_id
device_ids = [device_id] if device_id else []
result = yield self.handle_request(
{"device_keys": {user_id: device_ids}}
)
defer.returnValue(result)
@defer.inlineCallbacks
def handle_request(self, body):
local_query = []
remote_queries = {}
for user_id, device_ids in body.get("device_keys", {}).items():
user = UserID.from_string(user_id)
if self.is_mine(user):
if not device_ids:
local_query.append((user_id, None))
else:
for device_id in device_ids:
local_query.append((user_id, device_id))
else:
remote_queries.setdefault(user.domain, {})[user_id] = list(
device_ids
)
results = yield self.store.get_e2e_device_keys(local_query)
json_result = {}
for user_id, device_keys in results.items():
for device_id, json_bytes in device_keys.items():
json_result.setdefault(user_id, {})[device_id] = json.loads(
json_bytes
)
for destination, device_keys in remote_queries.items():
remote_result = yield self.federation.query_client_keys(
destination, {"device_keys": device_keys}
)
for user_id, keys in remote_result["device_keys"].items():
if user_id in device_keys:
json_result[user_id] = keys
defer.returnValue((200, {"device_keys": json_result}))
class OneTimeKeyServlet(RestServlet):
"""
GET /keys/claim/<user-id>/<device-id>/<algorithm> HTTP/1.1
POST /keys/claim HTTP/1.1
{
"one_time_keys": {
"<user_id>": {
"<device_id>": "<algorithm>"
} } }
HTTP/1.1 200 OK
{
"one_time_keys": {
"<user_id>": {
"<device_id>": {
"<algorithm>:<key_id>": "<key_base64>"
} } } }
"""
PATTERNS = client_v2_patterns(
"/keys/claim(?:/?|(?:/"
"(?P<user_id>[^/]*)/(?P<device_id>[^/]*)/(?P<algorithm>[^/]*)"
")?)",
releases=()
)
def __init__(self, hs):
super(OneTimeKeyServlet, self).__init__()
self.store = hs.get_datastore()
self.auth = hs.get_auth()
self.clock = hs.get_clock()
self.federation = hs.get_replication_layer()
self.is_mine = hs.is_mine
@defer.inlineCallbacks
def on_GET(self, request, user_id, device_id, algorithm):
yield self.auth.get_user_by_req(request)
result = yield self.handle_request(
{"one_time_keys": {user_id: {device_id: algorithm}}}
)
defer.returnValue(result)
@defer.inlineCallbacks
def on_POST(self, request, user_id, device_id, algorithm):
yield self.auth.get_user_by_req(request)
body = parse_json_object_from_request(request)
result = yield self.handle_request(body)
defer.returnValue(result)
@defer.inlineCallbacks
def handle_request(self, body):
local_query = []
remote_queries = {}
for user_id, device_keys in body.get("one_time_keys", {}).items():
user = UserID.from_string(user_id)
if self.is_mine(user):
for device_id, algorithm in device_keys.items():
local_query.append((user_id, device_id, algorithm))
else:
remote_queries.setdefault(user.domain, {})[user_id] = (
device_keys
)
results = yield self.store.claim_e2e_one_time_keys(local_query)
json_result = {}
for user_id, device_keys in results.items():
for device_id, keys in device_keys.items():
for key_id, json_bytes in keys.items():
json_result.setdefault(user_id, {})[device_id] = {
key_id: json.loads(json_bytes)
}
for destination, device_keys in remote_queries.items():
remote_result = yield self.federation.claim_client_keys(
destination, {"one_time_keys": device_keys}
)
for user_id, keys in remote_result["one_time_keys"].items():
if user_id in device_keys:
json_result[user_id] = keys
defer.returnValue((200, {"one_time_keys": json_result}))
def register_servlets(hs, http_server):
KeyUploadServlet(hs).register(http_server)
KeyQueryServlet(hs).register(http_server)
OneTimeKeyServlet(hs).register(http_server)