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# -*- 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
from twisted.internet import defer
from synapse.api.errors import SynapseError
from synapse.http.servlet import (
RestServlet,
parse_integer,
parse_json_object_from_request,
parse_string,
)
from synapse.types import StreamToken
from ._base import client_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_patterns("/keys/upload(/(?P<device_id>[^/]+))?$")
def __init__(self, hs):
"""
Args:
hs (synapse.server.HomeServer): server
"""
super(KeyUploadServlet, self).__init__()
self.auth = hs.get_auth()
self.e2e_keys_handler = hs.get_e2e_keys_handler()
@defer.inlineCallbacks
def on_POST(self, request, device_id):
requester = yield self.auth.get_user_by_req(request, allow_guest=True)
user_id = requester.user.to_string()
body = parse_json_object_from_request(request)
if device_id is not None:
# passing the device_id here is deprecated; however, we allow it
# for now for compatibility with older clients.
if requester.device_id is not None and device_id != requester.device_id:
logger.warning(
"Client uploading keys for a different device "
"(logged in as %s, uploading for %s)",
requester.device_id,
device_id,
)
else:
device_id = requester.device_id
if device_id is None:
raise SynapseError(
400, "To upload keys, you must pass device_id when authenticating"
)
result = yield self.e2e_keys_handler.upload_keys_for_user(
user_id, device_id, body
)
defer.returnValue((200, result))
class KeyQueryServlet(RestServlet):
"""
POST /keys/query HTTP/1.1
Content-Type: application/json
{
"device_keys": {
"<user_id>": ["<device_id>"]
} }
HTTP/1.1 200 OK
{
"device_keys": {
"<user_id>": {
"<device_id>": {
"user_id": "<user_id>", // Duplicated to be signed
"device_id": "<device_id>", // Duplicated to be signed
"valid_until_ts": <millisecond_timestamp>,
"algorithms": [ // List of supported algorithms
"m.olm.curve25519-aes-sha256",
],
"keys": { // Must include a ed25519 signing key
"<algorithm>:<key_id>": "<key_base64>",
},
"signatures:" {
// Must be signed with device's ed25519 key
"<user_id>/<device_id>": {
"<algorithm>:<key_id>": "<signature_base64>"
}
// Must be signed by this server.
"<server_name>": {
"<algorithm>:<key_id>": "<signature_base64>"
} } } } } }
"""
PATTERNS = client_patterns("/keys/query$")
def __init__(self, hs):
"""
Args:
hs (synapse.server.HomeServer):
"""
super(KeyQueryServlet, self).__init__()
self.auth = hs.get_auth()
self.e2e_keys_handler = hs.get_e2e_keys_handler()
@defer.inlineCallbacks
def on_POST(self, request):
yield self.auth.get_user_by_req(request, allow_guest=True)
timeout = parse_integer(request, "timeout", 10 * 1000)
body = parse_json_object_from_request(request)
result = yield self.e2e_keys_handler.query_devices(body, timeout)
defer.returnValue((200, result))
class KeyChangesServlet(RestServlet):
"""Returns the list of changes of keys between two stream tokens (may return
spurious extra results, since we currently ignore the `to` param).
GET /keys/changes?from=...&to=...
200 OK
{ "changed": ["@foo:example.com"] }
"""
PATTERNS = client_patterns("/keys/changes$")
def __init__(self, hs):
"""
Args:
hs (synapse.server.HomeServer):
"""
super(KeyChangesServlet, self).__init__()
self.auth = hs.get_auth()
self.device_handler = hs.get_device_handler()
@defer.inlineCallbacks
def on_GET(self, request):
requester = yield self.auth.get_user_by_req(request, allow_guest=True)
from_token_string = parse_string(request, "from")
# We want to enforce they do pass us one, but we ignore it and return
# changes after the "to" as well as before.
parse_string(request, "to")
from_token = StreamToken.from_string(from_token_string)
user_id = requester.user.to_string()
results = yield self.device_handler.get_user_ids_changed(user_id, from_token)
defer.returnValue((200, results))
class OneTimeKeyServlet(RestServlet):
"""
POST /keys/claim HTTP/1.1
{
"one_time_keys": {
"<user_id>": {
"<device_id>": "<algorithm>"
} } }
HTTP/1.1 200 OK
{
"one_time_keys": {
"<user_id>": {
"<device_id>": {
"<algorithm>:<key_id>": "<key_base64>"
} } } }
"""
PATTERNS = client_patterns("/keys/claim$")
def __init__(self, hs):
super(OneTimeKeyServlet, self).__init__()
self.auth = hs.get_auth()
self.e2e_keys_handler = hs.get_e2e_keys_handler()
@defer.inlineCallbacks
def on_POST(self, request):
yield self.auth.get_user_by_req(request, allow_guest=True)
timeout = parse_integer(request, "timeout", 10 * 1000)
body = parse_json_object_from_request(request)
result = yield self.e2e_keys_handler.claim_one_time_keys(body, timeout)
defer.returnValue((200, result))
def register_servlets(hs, http_server):
KeyUploadServlet(hs).register(http_server)
KeyQueryServlet(hs).register(http_server)
KeyChangesServlet(hs).register(http_server)
OneTimeKeyServlet(hs).register(http_server)
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