80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
// Copyright 2017 Michael Telatysnki <7t3chguy@gmail.com>
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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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package routing
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import (
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"crypto/hmac"
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"crypto/sha1"
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"encoding/base64"
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"fmt"
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"net/http"
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"time"
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"github.com/matrix-org/dendrite/clientapi/jsonerror"
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"github.com/matrix-org/dendrite/setup/config"
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"github.com/matrix-org/dendrite/userapi/api"
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"github.com/matrix-org/gomatrix"
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"github.com/matrix-org/util"
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)
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// RequestTurnServer implements:
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// GET /voip/turnServer
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func RequestTurnServer(req *http.Request, device *api.Device, cfg *config.ClientAPI) util.JSONResponse {
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turnConfig := cfg.TURN
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// TODO Guest Support
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if len(turnConfig.URIs) == 0 || turnConfig.UserLifetime == "" {
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: struct{}{},
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}
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}
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// Duration checked at startup, err not possible
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duration, _ := time.ParseDuration(turnConfig.UserLifetime)
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resp := gomatrix.RespTurnServer{
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URIs: turnConfig.URIs,
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TTL: int(duration.Seconds()),
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}
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if turnConfig.SharedSecret != "" {
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expiry := time.Now().Add(duration).Unix()
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mac := hmac.New(sha1.New, []byte(turnConfig.SharedSecret))
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_, err := mac.Write([]byte(resp.Username))
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if err != nil {
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util.GetLogger(req.Context()).WithError(err).Error("mac.Write failed")
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return jsonerror.InternalServerError()
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}
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resp.Username = fmt.Sprintf("%d:%s", expiry, device.UserID)
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resp.Password = base64.StdEncoding.EncodeToString(mac.Sum(nil))
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} else if turnConfig.Username != "" && turnConfig.Password != "" {
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resp.Username = turnConfig.Username
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resp.Password = turnConfig.Password
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} else {
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: struct{}{},
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}
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}
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: resp,
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}
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}
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