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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.
- import base64
- import hashlib
- import hmac
- from twisted.internet import defer
- from synapse.http.servlet import RestServlet
- from synapse.rest.client.v2_alpha._base import client_patterns
- class VoipRestServlet(RestServlet):
- PATTERNS = client_patterns("/voip/turnServer$", v1=True)
- def __init__(self, hs):
- super(VoipRestServlet, self).__init__()
- self.hs = hs
- self.auth = hs.get_auth()
- @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.encode(), msg=username.encode(), 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:
- return (200, {})
- return (
- 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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