mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-26 17:46:26 +03:00
Joey Parrish
56ebf6286c
For content without a clear lead, the order of 'waitingforkey' and 'keystatuseschange' is inconsistent and causes false positives for the WRONG_KEYS error. Without an obvious inverse for 'waitingforkey', we will have to drop the WRONG_KEYS diagnostic error. See also: w3c/encrypted-media#284 Change-Id: Icc1c420ff5d177a0329db244a6b28e99820a5221
1202 lines
39 KiB
JavaScript
1202 lines
39 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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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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*/
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goog.provide('shaka.media.DrmEngine');
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goog.require('goog.asserts');
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goog.require('shaka.log');
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goog.require('shaka.net.NetworkingEngine');
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goog.require('shaka.util.ArrayUtils');
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goog.require('shaka.util.Error');
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goog.require('shaka.util.EventManager');
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goog.require('shaka.util.Functional');
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goog.require('shaka.util.IDestroyable');
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goog.require('shaka.util.MapUtils');
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goog.require('shaka.util.PublicPromise');
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goog.require('shaka.util.StringUtils');
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goog.require('shaka.util.Timer');
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goog.require('shaka.util.Uint8ArrayUtils');
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/**
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* @constructor
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* @param {!shaka.net.NetworkingEngine} networkingEngine
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* @param {function(!shaka.util.Error)} onError Called when an error occurs.
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* @param {function(!Object.<string, string>)} onKeyStatus Called when key
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* status changes. Argument is a map of hex key IDs to statuses.
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* @struct
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* @implements {shaka.util.IDestroyable}
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*/
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shaka.media.DrmEngine = function(networkingEngine, onError, onKeyStatus) {
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/** @private {Array.<string>} */
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this.supportedTypes_ = null;
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/** @private {MediaKeys} */
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this.mediaKeys_ = null;
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/** @private {HTMLMediaElement} */
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this.video_ = null;
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/** @private {boolean} */
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this.initialized_ = false;
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/** @private {?shakaExtern.DrmInfo} */
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this.currentDrmInfo_ = null;
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/** @private {shaka.util.EventManager} */
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this.eventManager_ = new shaka.util.EventManager();
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/** @private {!Array.<shaka.media.DrmEngine.ActiveSession>} */
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this.activeSessions_ = [];
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/** @private {!Array.<string>} */
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this.offlineSessionIds_ = [];
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/** @private {!shaka.util.PublicPromise} */
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this.allSessionsLoaded_ = new shaka.util.PublicPromise();
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/** @private {shaka.net.NetworkingEngine} */
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this.networkingEngine_ = networkingEngine;
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/** @private {?shakaExtern.DrmConfiguration} */
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this.config_ = null;
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/** @private {?function(!shaka.util.Error)} */
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this.onError_ = (function(err) {
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this.allSessionsLoaded_.reject(err);
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onError(err);
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}.bind(this));
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/** @private {!Object.<string, string>} */
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this.keyStatusByKeyId_ = {};
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/** @private {?function(!Object.<string, string>)} */
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this.onKeyStatus_ = onKeyStatus;
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/** @private {shaka.util.Timer} */
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this.keyStatusTimer_ = new shaka.util.Timer(
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this.processKeyStatusChanges_.bind(this));
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/** @private {boolean} */
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this.destroyed_ = false;
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/** @private {boolean} */
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this.isOffline_ = false;
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// Add a catch to the Promise to avoid console logs about uncaught errors.
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this.allSessionsLoaded_.catch(function() {});
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};
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/**
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* @typedef {{
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* loaded: boolean,
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* initData: Uint8Array,
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* session: !MediaKeySession
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* }}
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*
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* @description A record to track sessions and suppress duplicate init data.
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* @property {boolean} loaded
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* True once the key status has been updated (to a non-pending state). This
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* does not mean the session is 'usable'.
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* @property {Uint8Array} initData
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* The init data used to create the session.
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* @property {!MediaKeySession} session
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* The session object.
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*/
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shaka.media.DrmEngine.ActiveSession;
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/** @override */
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shaka.media.DrmEngine.prototype.destroy = function() {
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var Functional = shaka.util.Functional;
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this.destroyed_ = true;
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var async = this.activeSessions_.map(function(activeSession) {
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// Ignore any errors when closing the sessions. One such error would be
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// an invalid state error triggered by closing a session which has not
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// generated any key requests.
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activeSession.session.close().catch(Functional.noop);
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goog.asserts.assert(activeSession.session.closed, 'Bad EME implementation');
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return activeSession.session.closed;
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});
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this.allSessionsLoaded_.reject();
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if (this.eventManager_)
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async.push(this.eventManager_.destroy());
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if (this.video_) {
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goog.asserts.assert(!this.video_.src, 'video src must be removed first!');
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async.push(this.video_.setMediaKeys(null).catch(Functional.noop));
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}
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if (this.keyStatusTimer_) {
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this.keyStatusTimer_.cancel();
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}
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this.keyStatusTimer_ = null;
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this.currentDrmInfo_ = null;
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this.supportedTypes_ = null;
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this.mediaKeys_ = null;
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this.video_ = null;
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this.eventManager_ = null;
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this.activeSessions_ = [];
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this.offlineSessionIds_ = [];
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this.networkingEngine_ = null; // We don't own it, don't destroy() it.
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this.config_ = null;
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this.onError_ = null;
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return Promise.all(async);
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};
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/**
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* Called by the Player to provide an updated configuration any time it changes.
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* Must be called at least once before init().
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*
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* @param {shakaExtern.DrmConfiguration} config
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*/
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shaka.media.DrmEngine.prototype.configure = function(config) {
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this.config_ = config;
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};
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/**
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* Negotiate for a key system and set up MediaKeys.
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* @param {!shakaExtern.Manifest} manifest The manifest is read for MIME type
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* and DRM information to query EME. If the 'clearKeys' configuration is
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* used, the manifest will be modified to force the use of Clear Key.
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* @param {boolean} offline True if we are storing or loading offline content.
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* @return {!Promise} Resolved if/when a key system has been chosen.
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*/
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shaka.media.DrmEngine.prototype.init = function(manifest, offline) {
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goog.asserts.assert(this.config_,
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'DrmEngine configure() must be called before init()!');
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/** @type {!Object.<string, MediaKeySystemConfiguration>} */
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var configsByKeySystem = {};
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/** @type {!Array.<string>} */
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var keySystemsInOrder = [];
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// |isOffline_| determines what kind of session to create. The argument to
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// |prepareMediaKeyConfigs_| determines the kind of CDM to query for. So
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// we still need persistent state when we are loading offline sessions.
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this.isOffline_ = offline;
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this.offlineSessionIds_ = manifest.offlineSessionIds;
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this.prepareMediaKeyConfigs_(
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manifest, offline || manifest.offlineSessionIds.length > 0,
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configsByKeySystem, keySystemsInOrder);
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if (!keySystemsInOrder.length) {
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// Unencrypted.
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this.initialized_ = true;
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return Promise.resolve();
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}
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return this.queryMediaKeys_(configsByKeySystem, keySystemsInOrder);
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};
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/**
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* Attach MediaKeys to the video element and start processing events.
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* @param {HTMLMediaElement} video
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* @return {!Promise}
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*/
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shaka.media.DrmEngine.prototype.attach = function(video) {
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if (!this.mediaKeys_) {
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// Unencrypted, or so we think. We listen for encrypted events in order to
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// warn when the stream is encrypted, even though the manifest does not know
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// it.
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this.eventManager_.listen(video, 'encrypted', function(event) {
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// Don't complain about this twice.
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this.eventManager_.unlisten(video, 'encrypted');
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this.onError_(new shaka.util.Error(
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shaka.util.Error.Category.DRM,
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shaka.util.Error.Code.ENCRYPTED_CONTENT_WITHOUT_DRM_INFO));
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}.bind(this));
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return Promise.resolve();
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}
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this.video_ = video;
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var setMediaKeys = this.video_.setMediaKeys(this.mediaKeys_);
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setMediaKeys = setMediaKeys.catch(function(exception) {
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return Promise.reject(new shaka.util.Error(
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shaka.util.Error.Category.DRM,
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shaka.util.Error.Code.FAILED_TO_ATTACH_TO_VIDEO,
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exception.message));
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});
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var setServerCertificate = null;
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if (this.currentDrmInfo_.serverCertificate) {
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setServerCertificate = this.mediaKeys_.setServerCertificate(
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this.currentDrmInfo_.serverCertificate);
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setServerCertificate = setServerCertificate.catch(function(exception) {
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return Promise.reject(new shaka.util.Error(
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shaka.util.Error.Category.DRM,
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shaka.util.Error.Code.INVALID_SERVER_CERTIFICATE,
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exception.message));
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});
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}
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return Promise.all([setMediaKeys, setServerCertificate]).then(function() {
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if (this.destroyed_) return Promise.reject();
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this.createOrLoad();
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if (!this.currentDrmInfo_.initData.length &&
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!this.offlineSessionIds_.length) {
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// Explicit init data for any one stream or an offline session is
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// sufficient to suppress 'encrypted' events for all streams.
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var onEncrypted = /** @type {shaka.util.EventManager.ListenerType} */(
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this.onEncrypted_.bind(this));
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this.eventManager_.listen(this.video_, 'encrypted', onEncrypted);
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}
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}.bind(this)).catch(function(error) {
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if (this.destroyed_) return Promise.resolve(); // Ignore destruction errors
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return Promise.reject(error);
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}.bind(this));
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};
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/**
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* Removes the given offline sessions and deletes their data. Must call init()
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* before this.
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*
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* @param {!Array.<string>} sessions
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* @return {!Promise}
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*/
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shaka.media.DrmEngine.prototype.removeSessions = function(sessions) {
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goog.asserts.assert(this.mediaKeys_ || !sessions.length,
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'Must call init() before removeSessions');
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return Promise.all(sessions.map(function(sessionId) {
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return this.loadOfflineSession_(sessionId).then(function(session) {
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// This will be null on error, such as session not found.
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if (session)
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return session.remove();
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});
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}.bind(this)));
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};
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/**
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* Creates the sessions for the init data and waits for them to become ready.
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*
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* @return {!Promise}
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*/
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shaka.media.DrmEngine.prototype.createOrLoad = function() {
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var initDatas = this.currentDrmInfo_ ? this.currentDrmInfo_.initData : [];
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initDatas.forEach(function(initDataOverride) {
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this.createTemporarySession_(
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initDataOverride.initDataType, initDataOverride.initData);
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}.bind(this));
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this.offlineSessionIds_.forEach(function(sessionId) {
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this.loadOfflineSession_(sessionId);
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}.bind(this));
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if (!initDatas.length && !this.offlineSessionIds_.length)
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this.allSessionsLoaded_.resolve();
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return this.allSessionsLoaded_;
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};
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/** @return {boolean} */
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shaka.media.DrmEngine.prototype.initialized = function() {
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return this.initialized_;
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};
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/** @return {string} */
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shaka.media.DrmEngine.prototype.keySystem = function() {
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return this.currentDrmInfo_ ? this.currentDrmInfo_.keySystem : '';
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};
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/**
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* Returns an array of the media types supported by the current key system.
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* These will be full mime types (e.g. 'video/webm; codecs="vp8"').
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*
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* @return {Array.<string>}
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*/
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shaka.media.DrmEngine.prototype.getSupportedTypes = function() {
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return this.supportedTypes_;
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};
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/**
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* Returns the ID of the sessions currently active.
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*
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* @return {!Array.<string>}
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*/
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shaka.media.DrmEngine.prototype.getSessionIds = function() {
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return this.activeSessions_.map(function(session) {
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return session.session.sessionId;
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});
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};
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/**
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* Returns the DrmInfo that was used to initialize the current key system.
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*
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* @return {?shakaExtern.DrmInfo}
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*/
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shaka.media.DrmEngine.prototype.getDrmInfo = function() {
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return this.currentDrmInfo_;
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};
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/**
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* @param {!shakaExtern.Manifest} manifest
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* @param {boolean} offline True if we are storing or loading offline content.
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* @param {!Object.<string, MediaKeySystemConfiguration>} configsByKeySystem
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* (Output parameter.) A dictionary of configs, indexed by key system.
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* @param {!Array.<string>} keySystemsInOrder
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* (Output parameter.) A list of key systems in the order in which we
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* encounter them.
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* @see https://goo.gl/nwdYnY for MediaKeySystemConfiguration spec
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* @private
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*/
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shaka.media.DrmEngine.prototype.prepareMediaKeyConfigs_ =
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function(manifest, offline, configsByKeySystem, keySystemsInOrder) {
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var clearKeyDrmInfo = this.configureClearKey_();
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// TODO: Remove once Edge has released a fix for https://goo.gl/vr2Vle
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var isEdge = navigator.userAgent.indexOf('Edge/') >= 0;
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manifest.periods.forEach(function(period) {
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period.streamSets.forEach(function(streamSet) {
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if (streamSet.type == 'text')
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return; // skip
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// clearKey config overrides manifest DrmInfo if present.
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// The manifest is modified so that filtering in Player still works.
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if (clearKeyDrmInfo) {
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streamSet.drmInfos = [clearKeyDrmInfo];
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}
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streamSet.drmInfos.forEach(function(drmInfo) {
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this.fillInDrmInfoDefaults_(drmInfo);
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var config = configsByKeySystem[drmInfo.keySystem];
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if (!config) {
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config = {
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// ignore initDataTypes
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audioCapabilities: [],
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videoCapabilities: [],
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distinctiveIdentifier: 'optional',
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persistentState: offline ? 'required' : 'optional',
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sessionTypes: [offline ? 'persistent-license' : 'temporary'],
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label: drmInfo.keySystem,
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drmInfos: [] // tracked by us, ignored by EME
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};
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configsByKeySystem[drmInfo.keySystem] = config;
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keySystemsInOrder.push(drmInfo.keySystem);
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}
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config.drmInfos.push(drmInfo);
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if (drmInfo.distinctiveIdentifierRequired)
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config.distinctiveIdentifier = 'required';
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if (drmInfo.persistentStateRequired)
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config.persistentState = 'required';
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/** @type {!Array.<!MediaKeySystemMediaCapability>} */
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var capabilities = (streamSet.type == 'video') ?
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config.videoCapabilities : config.audioCapabilities;
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/** @type {string} */
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var robustness = ((streamSet.type == 'video') ?
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drmInfo.videoRobustness : drmInfo.audioRobustness) || '';
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streamSet.streams.forEach(function(stream) {
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var fullMimeType = stream.mimeType;
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if (stream.codecs) {
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fullMimeType += '; codecs="' + stream.codecs + '"';
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}
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// Edge 13 fails this negotiation with NotSupportedError if more than
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// one entry is given, even if each entry individually would be
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// supported. Bug filed: https://goo.gl/vr2Vle
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// TODO: Remove once Edge has released a fix.
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if (isEdge && drmInfo.keySystem == 'com.microsoft.playready' &&
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capabilities.length) {
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return;
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}
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capabilities.push({
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robustness: robustness,
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contentType: fullMimeType
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});
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}.bind(this)); // streamSet.streams.forEach
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}.bind(this)); // streamSet.drmInfos.forEach
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}.bind(this)); // period.streamSets.forEach
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}.bind(this)); // manifest.perios.forEach
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};
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/**
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* @param {!Object.<string, MediaKeySystemConfiguration>} configsByKeySystem
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* A dictionary of configs, indexed by key system.
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* @param {!Array.<string>} keySystemsInOrder
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* A list of key systems in the order in which we should query them.
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* On a browser which supports multiple key systems, the order may indicate
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* a real preference for the application.
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* @return {!Promise} Resolved if/when a key system has been chosen.
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* @private
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*/
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shaka.media.DrmEngine.prototype.queryMediaKeys_ =
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function(configsByKeySystem, keySystemsInOrder) {
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if (keySystemsInOrder.length == 1 && keySystemsInOrder[0] == '') {
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return Promise.reject(new shaka.util.Error(
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shaka.util.Error.Category.DRM,
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shaka.util.Error.Code.NO_RECOGNIZED_KEY_SYSTEMS));
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}
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// Wait to reject this initial Promise until we have built the entire chain.
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var instigator = new shaka.util.PublicPromise();
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var p = instigator;
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// Try key systems with configured license servers first. We only have to try
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// key systems without configured license servers for diagnostic reasons, so
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// that we can differentiate between "none of these key systems are available"
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// and "some are available, but you did not configure them properly." The
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// former takes precedence.
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[true, false].forEach(function(shouldHaveLicenseServer) {
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keySystemsInOrder.forEach(function(keySystem) {
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var config = configsByKeySystem[keySystem];
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var hasLicenseServer = config.drmInfos.some(function(info) {
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return !!info.licenseServerUri;
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});
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if (hasLicenseServer != shouldHaveLicenseServer) return;
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// If there are no tracks of a type, these should be not present.
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// Otherwise the query will fail.
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if (config.audioCapabilities.length == 0) {
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delete config.audioCapabilities;
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}
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if (config.videoCapabilities.length == 0) {
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delete config.videoCapabilities;
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}
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p = p.catch(function() {
|
|
if (this.destroyed_) return Promise.reject();
|
|
return navigator.requestMediaKeySystemAccess(keySystem, [config]);
|
|
}.bind(this));
|
|
}.bind(this));
|
|
}.bind(this));
|
|
|
|
p = p.catch(function() {
|
|
return Promise.reject(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.REQUESTED_KEY_SYSTEM_CONFIG_UNAVAILABLE));
|
|
});
|
|
|
|
p = p.then(function(mediaKeySystemAccess) {
|
|
if (this.destroyed_) return Promise.reject();
|
|
|
|
// Store the capabilities of the key system.
|
|
var realConfig = mediaKeySystemAccess.getConfiguration();
|
|
var audioCaps = realConfig.audioCapabilities || [];
|
|
var videoCaps = realConfig.videoCapabilities || [];
|
|
var caps = audioCaps.concat(videoCaps);
|
|
this.supportedTypes_ = caps.map(function(c) { return c.contentType; });
|
|
if (this.supportedTypes_.length == 0) {
|
|
// Edge 13 does not report capabilities. To work around this, set the
|
|
// supported types to null, which Player will use as a signal that the
|
|
// information is not available.
|
|
// See: https://goo.gl/0cSuT2
|
|
this.supportedTypes_ = null;
|
|
}
|
|
|
|
var originalConfig = configsByKeySystem[mediaKeySystemAccess.keySystem];
|
|
this.createCurrentDrmInfo_(
|
|
mediaKeySystemAccess.keySystem, originalConfig,
|
|
originalConfig.drmInfos);
|
|
|
|
if (!this.currentDrmInfo_.licenseServerUri) {
|
|
return Promise.reject(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.NO_LICENSE_SERVER_GIVEN));
|
|
}
|
|
|
|
return mediaKeySystemAccess.createMediaKeys();
|
|
}.bind(this)).then(function(mediaKeys) {
|
|
if (this.destroyed_) return Promise.reject();
|
|
|
|
this.mediaKeys_ = mediaKeys;
|
|
this.initialized_ = true;
|
|
}.bind(this)).catch(function(exception) {
|
|
if (this.destroyed_) return Promise.resolve(); // Ignore destruction errors
|
|
|
|
// Don't rewrap a shaka.util.Error from earlier in the chain:
|
|
this.currentDrmInfo_ = null;
|
|
this.supportedTypes_ = null;
|
|
if (exception instanceof shaka.util.Error) {
|
|
return Promise.reject(exception);
|
|
}
|
|
|
|
// We failed to create MediaKeys. This generally shouldn't happen.
|
|
return Promise.reject(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.FAILED_TO_CREATE_CDM,
|
|
exception.message));
|
|
}.bind(this));
|
|
|
|
instigator.reject();
|
|
return p;
|
|
};
|
|
|
|
|
|
/**
|
|
* Use this.config_ to fill in missing values in drmInfo.
|
|
* @param {shakaExtern.DrmInfo} drmInfo
|
|
* @private
|
|
*/
|
|
shaka.media.DrmEngine.prototype.fillInDrmInfoDefaults_ = function(drmInfo) {
|
|
var keySystem = drmInfo.keySystem;
|
|
|
|
if (!keySystem) {
|
|
// This is a placeholder from the manifest parser for an unrecognized key
|
|
// system. Skip this entry, to avoid logging nonsensical errors.
|
|
return;
|
|
}
|
|
|
|
if (!drmInfo.licenseServerUri) {
|
|
var server = this.config_.servers[keySystem];
|
|
if (server) {
|
|
drmInfo.licenseServerUri = server;
|
|
} else {
|
|
shaka.log.error('No license server configured for ' + keySystem);
|
|
}
|
|
}
|
|
|
|
var advanced = this.config_.advanced[keySystem];
|
|
if (advanced) {
|
|
if (!drmInfo.distinctiveIdentifierRequired) {
|
|
drmInfo.distinctiveIdentifierRequired =
|
|
advanced.distinctiveIdentifierRequired;
|
|
}
|
|
|
|
if (!drmInfo.persistentStateRequired) {
|
|
drmInfo.persistentStateRequired = advanced.persistentStateRequired;
|
|
}
|
|
|
|
if (!drmInfo.videoRobustness) {
|
|
drmInfo.videoRobustness = advanced.videoRobustness;
|
|
}
|
|
|
|
if (!drmInfo.audioRobustness) {
|
|
drmInfo.audioRobustness = advanced.audioRobustness;
|
|
}
|
|
|
|
if (!drmInfo.serverCertificate) {
|
|
drmInfo.serverCertificate = advanced.serverCertificate;
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* Create a DrmInfo using configured clear keys.
|
|
* The server URI will be a data URI which decodes to a clearkey license.
|
|
* @return {?shakaExtern.DrmInfo} or null if clear keys are not configured.
|
|
* @private
|
|
* @see https://goo.gl/6nPdhF for the spec on the clearkey license format.
|
|
*/
|
|
shaka.media.DrmEngine.prototype.configureClearKey_ = function() {
|
|
var hasClearKeys = !shaka.util.MapUtils.empty(this.config_.clearKeys);
|
|
if (!hasClearKeys) return null;
|
|
|
|
var StringUtils = shaka.util.StringUtils;
|
|
var Uint8ArrayUtils = shaka.util.Uint8ArrayUtils;
|
|
var keys = [];
|
|
var keyIds = [];
|
|
|
|
for (var keyIdHex in this.config_.clearKeys) {
|
|
var keyHex = this.config_.clearKeys[keyIdHex];
|
|
|
|
var keyId = Uint8ArrayUtils.fromHex(keyIdHex);
|
|
var key = Uint8ArrayUtils.fromHex(keyHex);
|
|
var keyObj = {
|
|
kty: 'oct',
|
|
kid: Uint8ArrayUtils.toBase64(keyId, false),
|
|
k: Uint8ArrayUtils.toBase64(key, false)
|
|
};
|
|
|
|
keys.push(keyObj);
|
|
keyIds.push(keyObj.kid);
|
|
}
|
|
|
|
var jwkSet = {keys: keys};
|
|
var license = JSON.stringify(jwkSet);
|
|
|
|
// Use the keyids init data since is suggested by EME.
|
|
// Suggestion: https://goo.gl/R72xp4
|
|
// Format: https://goo.gl/75RCP6
|
|
var initDataStr = JSON.stringify({'kids': keyIds});
|
|
var initData = new Uint8Array(StringUtils.toUTF8(initDataStr));
|
|
var initDatas = [{initData: initData, initDataType: 'keyids'}];
|
|
|
|
return {
|
|
keySystem: 'org.w3.clearkey',
|
|
licenseServerUri: 'data:application/json;base64,' + window.btoa(license),
|
|
distinctiveIdentifierRequired: false,
|
|
persistentStateRequired: false,
|
|
audioRobustness: '',
|
|
videoRobustness: '',
|
|
serverCertificate: null,
|
|
initData: initDatas
|
|
};
|
|
};
|
|
|
|
|
|
/**
|
|
* Creates a DrmInfo object describing the settings used to initialize the
|
|
* engine.
|
|
*
|
|
* @param {string} keySystem
|
|
* @param {MediaKeySystemConfiguration} config
|
|
* @param {!Array.<shakaExtern.DrmInfo>} drmInfos
|
|
* @private
|
|
*/
|
|
shaka.media.DrmEngine.prototype.createCurrentDrmInfo_ = function(
|
|
keySystem, config, drmInfos) {
|
|
/** @type {!Array.<string>} */
|
|
var licenseServers = [];
|
|
|
|
/** @type {!Array.<!Uint8Array>} */
|
|
var serverCerts = [];
|
|
|
|
/** @type {!Array.<!shakaExtern.InitDataOverride>} */
|
|
var initDatas = [];
|
|
|
|
this.processDrmInfos_(drmInfos, licenseServers, serverCerts, initDatas);
|
|
|
|
if (serverCerts.length > 1) {
|
|
shaka.log.warning('Multiple unique server certificates found! ' +
|
|
'Only the first will be used.');
|
|
}
|
|
|
|
if (licenseServers.length > 1) {
|
|
shaka.log.warning('Multiple unique license server URIs found! ' +
|
|
'Only the first will be used.');
|
|
}
|
|
|
|
// TODO: This only works when all DrmInfo have the same robustness.
|
|
var audioRobustness =
|
|
config.audioCapabilities ? config.audioCapabilities[0].robustness : '';
|
|
var videoRobustness =
|
|
config.videoCapabilities ? config.videoCapabilities[0].robustness : '';
|
|
this.currentDrmInfo_ = {
|
|
keySystem: keySystem,
|
|
licenseServerUri: licenseServers[0],
|
|
distinctiveIdentifierRequired: (config.distinctiveIdentifier == 'required'),
|
|
persistentStateRequired: (config.persistentState == 'required'),
|
|
audioRobustness: audioRobustness,
|
|
videoRobustness: videoRobustness,
|
|
serverCertificate: serverCerts[0],
|
|
initData: initDatas
|
|
};
|
|
};
|
|
|
|
|
|
/**
|
|
* Extract license server, server cert, and init data from DrmInfos, taking
|
|
* care to eliminate duplicates.
|
|
*
|
|
* @param {!Array.<shakaExtern.DrmInfo>} drmInfos
|
|
* @param {!Array.<string>} licenseServers
|
|
* @param {!Array.<!Uint8Array>} serverCerts
|
|
* @param {!Array.<!shakaExtern.InitDataOverride>} initDatas
|
|
* @private
|
|
*/
|
|
shaka.media.DrmEngine.prototype.processDrmInfos_ =
|
|
function(drmInfos, licenseServers, serverCerts, initDatas) {
|
|
/**
|
|
* @param {shakaExtern.InitDataOverride} a
|
|
* @param {shakaExtern.InitDataOverride} b
|
|
* @return {boolean}
|
|
*/
|
|
function initDataOverrideEqual(a, b) {
|
|
return a.initDataType == b.initDataType &&
|
|
shaka.util.Uint8ArrayUtils.equal(a.initData, b.initData);
|
|
}
|
|
|
|
drmInfos.forEach(function(drmInfo) {
|
|
// Aliases:
|
|
var ArrayUtils = shaka.util.ArrayUtils;
|
|
var Uint8ArrayUtils = shaka.util.Uint8ArrayUtils;
|
|
|
|
// Build an array of unique license servers.
|
|
if (licenseServers.indexOf(drmInfo.licenseServerUri) == -1) {
|
|
licenseServers.push(drmInfo.licenseServerUri);
|
|
}
|
|
|
|
// Build an array of unique server certs.
|
|
if (drmInfo.serverCertificate) {
|
|
if (ArrayUtils.indexOf(serverCerts, drmInfo.serverCertificate,
|
|
Uint8ArrayUtils.equal) == -1) {
|
|
serverCerts.push(drmInfo.serverCertificate);
|
|
}
|
|
}
|
|
|
|
// Build an array of unique init datas.
|
|
if (drmInfo.initData) {
|
|
drmInfo.initData.forEach(function(initDataOverride) {
|
|
if (ArrayUtils.indexOf(initDatas, initDataOverride,
|
|
initDataOverrideEqual) == -1) {
|
|
initDatas.push(initDataOverride);
|
|
}
|
|
});
|
|
}
|
|
});
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {!MediaEncryptedEvent} event
|
|
* @private
|
|
*/
|
|
shaka.media.DrmEngine.prototype.onEncrypted_ = function(event) {
|
|
// Aliases:
|
|
var Uint8ArrayUtils = shaka.util.Uint8ArrayUtils;
|
|
|
|
var initData = new Uint8Array(event.initData);
|
|
|
|
// Suppress duplicate init data.
|
|
// Note that some init data are extremely large and can't portably be used as
|
|
// keys in a dictionary.
|
|
for (var i = 0; i < this.activeSessions_.length; ++i) {
|
|
if (Uint8ArrayUtils.equal(initData, this.activeSessions_[i].initData)) {
|
|
shaka.log.debug('Ignoring duplicate init data.');
|
|
return;
|
|
}
|
|
}
|
|
|
|
this.createTemporarySession_(event.initDataType, initData);
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {string} sessionId
|
|
* @return {!Promise.<MediaKeySession>}
|
|
* @private
|
|
*/
|
|
shaka.media.DrmEngine.prototype.loadOfflineSession_ = function(sessionId) {
|
|
var session;
|
|
try {
|
|
session = this.mediaKeys_.createSession('persistent-license');
|
|
} catch (exception) {
|
|
var error = new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.FAILED_TO_CREATE_SESSION,
|
|
exception.message);
|
|
this.onError_(error);
|
|
return Promise.reject(error);
|
|
}
|
|
|
|
this.eventManager_.listen(session, 'message',
|
|
/** @type {shaka.util.EventManager.ListenerType} */(
|
|
this.onSessionMessage_.bind(this)));
|
|
this.eventManager_.listen(session, 'keystatuseschange',
|
|
this.onKeyStatusesChange_.bind(this));
|
|
|
|
var activeSession = {initData: null, session: session, loaded: false};
|
|
this.activeSessions_.push(activeSession);
|
|
|
|
return session.load(sessionId).then(function(present) {
|
|
if (this.destroyed_) return;
|
|
|
|
if (!present) {
|
|
var i = this.activeSessions_.indexOf(activeSession);
|
|
goog.asserts.assert(i >= 0, 'Session must be in the array');
|
|
this.activeSessions_.splice(i, 1);
|
|
|
|
this.onError_(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.OFFLINE_SESSION_REMOVED));
|
|
return;
|
|
}
|
|
|
|
// TODO: We should get a key status change event. Remove once Chrome CDM
|
|
// is fixed.
|
|
activeSession.loaded = true;
|
|
if (this.activeSessions_.every(function(s) { return s.loaded; }))
|
|
this.allSessionsLoaded_.resolve();
|
|
|
|
return session;
|
|
}.bind(this), function(error) {
|
|
if (this.destroyed_) return;
|
|
|
|
var i = this.activeSessions_.indexOf(activeSession);
|
|
goog.asserts.assert(i >= 0, 'Session must be in the array');
|
|
this.activeSessions_.splice(i, 1);
|
|
|
|
this.onError_(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.FAILED_TO_CREATE_SESSION,
|
|
error.message));
|
|
}.bind(this));
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {string} initDataType
|
|
* @param {!Uint8Array} initData
|
|
* @private
|
|
*/
|
|
shaka.media.DrmEngine.prototype.createTemporarySession_ =
|
|
function(initDataType, initData) {
|
|
var session;
|
|
try {
|
|
if (this.isOffline_) {
|
|
session = this.mediaKeys_.createSession('persistent-license');
|
|
} else {
|
|
session = this.mediaKeys_.createSession();
|
|
}
|
|
} catch (exception) {
|
|
this.onError_(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.FAILED_TO_CREATE_SESSION,
|
|
exception.message));
|
|
return;
|
|
}
|
|
|
|
this.eventManager_.listen(session, 'message',
|
|
/** @type {shaka.util.EventManager.ListenerType} */(
|
|
this.onSessionMessage_.bind(this)));
|
|
this.eventManager_.listen(session, 'keystatuseschange',
|
|
this.onKeyStatusesChange_.bind(this));
|
|
this.activeSessions_.push(
|
|
{initData: initData, session: session, loaded: false});
|
|
|
|
session.generateRequest(initDataType, initData.buffer).catch(function(error) {
|
|
if (this.destroyed_) return;
|
|
|
|
for (var i = 0; i < this.activeSessions_.length; ++i) {
|
|
if (this.activeSessions_[i].session == session) {
|
|
this.activeSessions_.splice(i, 1);
|
|
break;
|
|
}
|
|
}
|
|
this.onError_(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.FAILED_TO_GENERATE_LICENSE_REQUEST,
|
|
error.message));
|
|
}.bind(this));
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {!MediaKeyMessageEvent} event
|
|
* @private
|
|
*/
|
|
shaka.media.DrmEngine.prototype.onSessionMessage_ = function(event) {
|
|
/** @type {!MediaKeySession} */
|
|
var session = event.target;
|
|
|
|
var requestType = shaka.net.NetworkingEngine.RequestType.LICENSE;
|
|
var request = shaka.net.NetworkingEngine.makeRequest(
|
|
[this.currentDrmInfo_.licenseServerUri], this.config_.retryParameters);
|
|
request.body = event.message;
|
|
request.method = 'POST';
|
|
// NOTE: allowCrossSiteCredentials can be set in a request filter.
|
|
|
|
if (this.currentDrmInfo_.keySystem == 'com.microsoft.playready') {
|
|
this.unpackPlayReadyRequest_(request);
|
|
}
|
|
|
|
this.networkingEngine_.request(requestType, request)
|
|
.then(function(response) {
|
|
if (this.destroyed_) return Promise.reject();
|
|
|
|
// Request succeeded, now pass the response to the CDM.
|
|
return session.update(response.data);
|
|
}.bind(this), function(error) {
|
|
// Ignore destruction errors
|
|
if (this.destroyed_) return Promise.resolve();
|
|
|
|
// Request failed!
|
|
goog.asserts.assert(error instanceof shaka.util.Error,
|
|
'Wrong NetworkingEngine error type!');
|
|
this.onError_(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.LICENSE_REQUEST_FAILED,
|
|
error));
|
|
}.bind(this)).catch(function(error) {
|
|
// Ignore destruction errors
|
|
if (this.destroyed_) return Promise.resolve();
|
|
|
|
// Session update failed!
|
|
this.onError_(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.LICENSE_RESPONSE_REJECTED,
|
|
error.message));
|
|
}.bind(this));
|
|
};
|
|
|
|
|
|
/**
|
|
* Unpack PlayReady license requests. Modifies the request object.
|
|
* @param {shakaExtern.Request} request
|
|
* @private
|
|
*/
|
|
shaka.media.DrmEngine.prototype.unpackPlayReadyRequest_ = function(request) {
|
|
// The PlayReady license message as it comes from the CDM can't be directly
|
|
// delivered to a license server. Other CDMs do not seem to need this kind
|
|
// of special handling.
|
|
|
|
// The raw license message is UTF-16-encoded XML. We need to unpack the
|
|
// Challenge element (base64-encoded string containing the actual license
|
|
// request) and any HttpHeader elements (sent as request headers).
|
|
|
|
// Example XML:
|
|
|
|
// <PlayReadyKeyMessage type="LicenseAcquisition">
|
|
// <LicenseAcquisition Version="1">
|
|
// <Challenge encoding="base64encoded">{Base64Data}</Challenge>
|
|
// <HttpHeaders>
|
|
// <HttpHeader>
|
|
// <name>Content-Type</name>
|
|
// <value>text/xml; charset=utf-8</value>
|
|
// </HttpHeader>
|
|
// <HttpHeader>
|
|
// <name>SOAPAction</name>
|
|
// <value>http://schemas.microsoft.com/DRM/etc/etc</value>
|
|
// </HttpHeader>
|
|
// </HttpHeaders>
|
|
// </LicenseAcquisition>
|
|
// </PlayReadyKeyMessage>
|
|
|
|
var xml = shaka.util.StringUtils.fromUTF16(
|
|
request.body, true /* littleEndian */);
|
|
var dom = new DOMParser().parseFromString(xml, 'application/xml');
|
|
|
|
// Set request headers.
|
|
var headers = dom.getElementsByTagName('HttpHeader');
|
|
for (var i = 0; i < headers.length; ++i) {
|
|
var name = headers[i].querySelector('name');
|
|
var value = headers[i].querySelector('value');
|
|
goog.asserts.assert(name && value, 'Malformed PlayReady headers!');
|
|
request.headers[name.textContent] = value.textContent;
|
|
}
|
|
|
|
// Unpack the base64-encoded challenge.
|
|
var challenge = dom.querySelector('Challenge');
|
|
goog.asserts.assert(challenge, 'Malformed PlayReady challenge!');
|
|
goog.asserts.assert(challenge.getAttribute('encoding') == 'base64encoded',
|
|
'Unexpected PlayReady challenge encoding!');
|
|
request.body =
|
|
shaka.util.Uint8ArrayUtils.fromBase64(challenge.textContent).buffer;
|
|
};
|
|
|
|
|
|
/**
|
|
* @param {!Event} event
|
|
* @private
|
|
* @suppress {invalidCasts,unnecessaryCasts} to swap keyId and status
|
|
*/
|
|
shaka.media.DrmEngine.prototype.onKeyStatusesChange_ = function(event) {
|
|
var session = /** @type {!MediaKeySession} */(event.target);
|
|
|
|
// Locate the session in the active sessions list.
|
|
var i;
|
|
for (i = 0; i < this.activeSessions_.length; ++i) {
|
|
if (this.activeSessions_[i].session == session) {
|
|
break;
|
|
}
|
|
}
|
|
goog.asserts.assert(i < this.activeSessions_.length,
|
|
'Key status change for inactive session!');
|
|
if (i == this.activeSessions_.length) return;
|
|
|
|
var keyStatusMap = session.keyStatuses;
|
|
var hasExpiredKeys = false;
|
|
|
|
if (keyStatusMap.forEach === undefined) {
|
|
// Older versions of Firefox (<= 46) use the old MediaKeyStatusMap API, so
|
|
// just forego checking key statuses on these versions: newer versions of
|
|
// Firefox use the new MediaKeyStatusMap API.
|
|
shaka.log.debug('keyStatuses.forEach missing!');
|
|
keyStatusMap = [];
|
|
}
|
|
|
|
keyStatusMap.forEach(function(status, keyId) {
|
|
// The spec has changed a few times on the exact order of arguments here.
|
|
// As of 2016-06-30, Edge has the order reversed compared to the current
|
|
// EME spec. Given the back and forth in the spec, it may not be the only
|
|
// one. Try to detect this and compensate:
|
|
if (typeof keyId == 'string') {
|
|
var tmp = keyId;
|
|
keyId = /** @type {ArrayBuffer} */(status);
|
|
status = /** @type {string} */(tmp);
|
|
}
|
|
|
|
// Microsoft's implementation in Edge seems to present key IDs as
|
|
// little-endian UUIDs, rather than big-endian or just plain array of bytes.
|
|
// standard: 6e 5a 1d 26 - 27 57 - 47 d7 - 80 46 ea a5 d1 d3 4b 5a
|
|
// on Edge: 26 1d 5a 6e - 57 27 - d7 47 - 80 46 ea a5 d1 d3 4b 5a
|
|
// Bug filed: https://goo.gl/gnRSkJ
|
|
|
|
// NOTE that we skip this if byteLength != 16. This is used for the IE11
|
|
// and Edge 12 EME polyfill, which uses single-byte dummy key IDs.
|
|
if (this.currentDrmInfo_.keySystem == 'com.microsoft.playready' &&
|
|
keyId.byteLength == 16) {
|
|
// Read out some fields in little-endian:
|
|
var dataView = new DataView(keyId);
|
|
var part0 = dataView.getUint32(0, true /* LE */);
|
|
var part1 = dataView.getUint16(4, true /* LE */);
|
|
var part2 = dataView.getUint16(6, true /* LE */);
|
|
// Write it back in big-endian:
|
|
dataView.setUint32(0, part0, false /* BE */);
|
|
dataView.setUint16(4, part1, false /* BE */);
|
|
dataView.setUint16(6, part2, false /* BE */);
|
|
}
|
|
|
|
// Microsoft's implementation in IE11 and Edge seems to never set key
|
|
// status to 'usable'. It is stuck forever at 'status-pending'. In spite
|
|
// of this, the keys do seem to be usable and content plays correctly.
|
|
// Bug filed: https://goo.gl/fcXEy1
|
|
if (this.currentDrmInfo_.keySystem == 'com.microsoft.playready' &&
|
|
status == 'status-pending') {
|
|
status = 'usable';
|
|
}
|
|
|
|
if (status != 'status-pending' && status != 'internal-error') {
|
|
this.activeSessions_[i].loaded = true;
|
|
if (this.activeSessions_.every(function(s) { return s.loaded; }))
|
|
this.allSessionsLoaded_.resolve();
|
|
}
|
|
|
|
if (status == 'expired') {
|
|
hasExpiredKeys = true;
|
|
}
|
|
|
|
var keyIdHex = shaka.util.Uint8ArrayUtils.toHex(new Uint8Array(keyId));
|
|
this.keyStatusByKeyId_[keyIdHex] = status;
|
|
}.bind(this));
|
|
|
|
// If the session has expired, close it.
|
|
// Some CDMs do not have sub-second time resolution, so the key status may
|
|
// fire with hundreds of milliseconds left until the stated expiration time.
|
|
var msUntilExpiration = session.expiration - Date.now();
|
|
if (msUntilExpiration < 0 || (hasExpiredKeys && msUntilExpiration < 1000)) {
|
|
shaka.log.debug('Session has expired', session);
|
|
this.activeSessions_.splice(i, 1);
|
|
session.close();
|
|
}
|
|
|
|
// Batch up key status changes before checking them or notifying Player.
|
|
// This handles cases where the statuses of multiple sessions are set
|
|
// simultaneously by the browser before dispatching key status changes for
|
|
// each of them. By batching these up, we only send one status change event
|
|
// and at most one EXPIRED error on expiration.
|
|
this.keyStatusTimer_.schedule(0.1);
|
|
};
|
|
|
|
|
|
/**
|
|
* @private
|
|
*/
|
|
shaka.media.DrmEngine.prototype.processKeyStatusChanges_ = function() {
|
|
// If all keys are expired, fire an error.
|
|
var allExpired = shaka.util.MapUtils.every(
|
|
this.keyStatusByKeyId_, function(keyId, status) {
|
|
return status == 'expired';
|
|
});
|
|
if (allExpired) {
|
|
this.onError_(new shaka.util.Error(
|
|
shaka.util.Error.Category.DRM,
|
|
shaka.util.Error.Code.EXPIRED));
|
|
}
|
|
|
|
this.onKeyStatus_(this.keyStatusByKeyId_);
|
|
};
|
|
|
|
|
|
/**
|
|
* Returns true if the browser has recent EME APIs.
|
|
*
|
|
* @return {boolean}
|
|
*/
|
|
shaka.media.DrmEngine.isBrowserSupported = function() {
|
|
var basic =
|
|
!!window.MediaKeys &&
|
|
!!window.navigator &&
|
|
!!window.navigator.requestMediaKeySystemAccess &&
|
|
!!window.MediaKeySystemAccess &&
|
|
!!window.MediaKeySystemAccess.prototype.getConfiguration;
|
|
|
|
return basic;
|
|
};
|
|
|
|
|
|
/**
|
|
* Returns a Promise to a map of EME support for well-known key systems.
|
|
*
|
|
* @return {!Promise.<!Object.<string, ?shakaExtern.DrmSupportType>>}
|
|
*/
|
|
shaka.media.DrmEngine.probeSupport = function() {
|
|
goog.asserts.assert(shaka.media.DrmEngine.isBrowserSupported(),
|
|
'Must have basic EME support');
|
|
|
|
var tests = [];
|
|
var testKeySystems = [
|
|
'org.w3.clearkey',
|
|
'com.widevine.alpha',
|
|
'com.microsoft.playready',
|
|
'com.apple.fps.2_0',
|
|
'com.apple.fps.1_0',
|
|
'com.apple.fps',
|
|
'com.adobe.primetime'
|
|
];
|
|
|
|
var config = {
|
|
persistentState: 'required',
|
|
sessionTypes: ['persistent-license']
|
|
};
|
|
var support = {};
|
|
testKeySystems.forEach(function(keySystem) {
|
|
var p = navigator.requestMediaKeySystemAccess(keySystem, [config, {}])
|
|
.then(function(access) {
|
|
// Create a media keys object and try to create an offline session.
|
|
// This is used to detect offline license support for browsers that
|
|
// do not correctly report it in the configuration.
|
|
// https://goo.gl/gtYT3z, https://goo.gl/rvnB1g, https://goo.gl/z0URJ0
|
|
return access.createMediaKeys();
|
|
})
|
|
.then(function(mediaKeys) {
|
|
var persistentState = false;
|
|
try {
|
|
// This will throw if persistent licenses are not supported.
|
|
mediaKeys.createSession('persistent-license');
|
|
persistentState = true;
|
|
} catch (e) {}
|
|
|
|
support[keySystem] = {persistentState: persistentState};
|
|
}, function() {
|
|
support[keySystem] = null;
|
|
});
|
|
tests.push(p);
|
|
});
|
|
|
|
return Promise.all(tests).then(function() {
|
|
return support;
|
|
});
|
|
};
|