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- # -*- coding: utf-8 -*-
- # Copyright 2014-2016 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.
- from twisted.internet import defer
- from .base import ClientV1RestServlet, client_path_patterns
- import hmac
- import hashlib
- import base64
- class VoipRestServlet(ClientV1RestServlet):
- PATTERNS = client_path_patterns("/voip/turnServer$")
- @defer.inlineCallbacks
- def on_GET(self, request):
- requester = yield self.auth.get_user_by_req(
- request,
- self.hs.config.turn_allow_guests
- )
- turnUris = self.hs.config.turn_uris
- turnSecret = self.hs.config.turn_shared_secret
- turnUsername = self.hs.config.turn_username
- turnPassword = self.hs.config.turn_password
- userLifetime = self.hs.config.turn_user_lifetime
- if turnUris and turnSecret and userLifetime:
- expiry = (self.hs.get_clock().time_msec() + userLifetime) / 1000
- username = "%d:%s" % (expiry, requester.user.to_string())
- mac = hmac.new(turnSecret, msg=username, digestmod=hashlib.sha1)
- # We need to use standard padded base64 encoding here
- # encode_base64 because we need to add the standard padding to get the
- # same result as the TURN server.
- password = base64.b64encode(mac.digest())
- elif turnUris and turnUsername and turnPassword and userLifetime:
- username = turnUsername
- password = turnPassword
- else:
- defer.returnValue((200, {}))
- defer.returnValue((200, {
- 'username': username,
- 'password': password,
- 'ttl': userLifetime / 1000,
- 'uris': turnUris,
- }))
- def on_OPTIONS(self, request):
- return (200, {})
- def register_servlets(hs, http_server):
- VoipRestServlet(hs).register(http_server)
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