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# Copyright 2022 The Matrix.org Foundation C.I.C.
#
# 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 typing import TYPE_CHECKING, Tuple
from synapse.http.server import HttpServer
from synapse.http.servlet import RestServlet, parse_json_object_from_request
from synapse.http.site import SynapseRequest
from synapse.rest.client._base import client_patterns, interactive_auth_handler
from synapse.types import JsonDict
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class LoginTokenRequestServlet(RestServlet):
"""
Get a token that can be used with `m.login.token` to log in a second device.
Request:
POST /login/token HTTP/1.1
Content-Type: application/json
{}
Response:
HTTP/1.1 200 OK
{
"login_token": "ABDEFGH",
"expires_in": 3600,
}
"""
PATTERNS = client_patterns(
"/org.matrix.msc3882/login/token$", releases=[], v1=False, unstable=True
)
def __init__(self, hs: "HomeServer"):
super().__init__()
self.auth = hs.get_auth()
self.store = hs.get_datastores().main
self.clock = hs.get_clock()
self.server_name = hs.config.server.server_name
self.macaroon_gen = hs.get_macaroon_generator()
self.auth_handler = hs.get_auth_handler()
self.token_timeout = hs.config.experimental.msc3882_token_timeout
self.ui_auth = hs.config.experimental.msc3882_ui_auth
@interactive_auth_handler
async def on_POST(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
requester = await self.auth.get_user_by_req(request)
body = parse_json_object_from_request(request)
if self.ui_auth:
await self.auth_handler.validate_user_via_ui_auth(
requester,
request,
body,
"issue a new access token for your account",
can_skip_ui_auth=False, # Don't allow skipping of UI auth
)
login_token = self.macaroon_gen.generate_short_term_login_token(
user_id=requester.user.to_string(),
auth_provider_id="org.matrix.msc3882.login_token_request",
duration_in_ms=self.token_timeout,
)
return (
200,
{
"login_token": login_token,
"expires_in": self.token_timeout // 1000,
},
)
def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
if hs.config.experimental.msc3882_enabled:
LoginTokenRequestServlet(hs).register(http_server)
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