61 lines
2.0 KiB
Python
61 lines
2.0 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer
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from .base import ClientV1RestServlet, client_path_patterns
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import hmac
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import hashlib
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import base64
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class VoipRestServlet(ClientV1RestServlet):
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PATTERNS = client_path_patterns("/voip/turnServer$")
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@defer.inlineCallbacks
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def on_GET(self, request):
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requester = yield self.auth.get_user_by_req(request)
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turnUris = self.hs.config.turn_uris
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turnSecret = self.hs.config.turn_shared_secret
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userLifetime = self.hs.config.turn_user_lifetime
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if not turnUris or not turnSecret or not userLifetime:
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defer.returnValue((200, {}))
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expiry = (self.hs.get_clock().time_msec() + userLifetime) / 1000
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username = "%d:%s" % (expiry, requester.user.to_string())
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mac = hmac.new(turnSecret, msg=username, digestmod=hashlib.sha1)
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# We need to use standard padded base64 encoding here
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# encode_base64 because we need to add the standard padding to get the
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# same result as the TURN server.
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password = base64.b64encode(mac.digest())
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defer.returnValue((200, {
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'username': username,
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'password': password,
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'ttl': userLifetime / 1000,
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'uris': turnUris,
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}))
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def on_OPTIONS(self, request):
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return (200, {})
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def register_servlets(hs, http_server):
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VoipRestServlet(hs).register(http_server)
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