@l5i/dashjs/build/es5/src/streaming/protection/drm/KeySystemClearKey.js

A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.

/**
 * The copyright in this software is being made available under the BSD License,
 * included below. This software may be subject to other third party and contributor
 * rights, including patent rights, and no such rights are granted under this license.
 *
 * Copyright (c) 2013, Dash Industry Forum.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *  * Redistributions of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation and/or
 *  other materials provided with the distribution.
 *  * Neither the name of Dash Industry Forum nor the names of its
 *  contributors may be used to endorse or promote products derived from this software
 *  without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
 *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */'use strict';Object.defineProperty(exports,'__esModule',{value:true});function _interopRequireDefault(obj){return obj && obj.__esModule?obj:{'default':obj};}var _voKeyPair=require('../vo/KeyPair');var _voKeyPair2=_interopRequireDefault(_voKeyPair);var _voClearKeyKeySet=require('../vo/ClearKeyKeySet');var _voClearKeyKeySet2=_interopRequireDefault(_voClearKeyKeySet);var _CommonEncryption=require('../CommonEncryption');var _CommonEncryption2=_interopRequireDefault(_CommonEncryption);var _constantsProtectionConstants=require('../../constants/ProtectionConstants');var _constantsProtectionConstants2=_interopRequireDefault(_constantsProtectionConstants);var uuid='e2719d58-a985-b3c9-781a-b030af78d30e';var systemString=_constantsProtectionConstants2['default'].CLEARKEY_KEYSTEM_STRING;var schemeIdURI='urn:uuid:' + uuid;function KeySystemClearKey(config){config = config || {};var instance=undefined;var BASE64=config.BASE64; /**
     * Returns desired clearkeys (as specified in the CDM message) from protection data
     *
     * @param {ProtectionData} protectionData the protection data
     * @param {ArrayBuffer} message the ClearKey CDM message
     * @returns {ClearKeyKeySet} the key set or null if none found
     * @throws {Error} if a keyID specified in the CDM message was not found in the
     * protection data
     * @memberof KeySystemClearKey
     */function getClearKeysFromProtectionData(protectionData,message){var clearkeySet=null;if(protectionData){ // ClearKey is the only system that does not require a license server URL, so we
// handle it here when keys are specified in protection data
var jsonMsg=JSON.parse(String.fromCharCode.apply(null,new Uint8Array(message)));var keyPairs=[];for(var i=0;i < jsonMsg.kids.length;i++) {var clearkeyID=jsonMsg.kids[i];var clearkey=protectionData.clearkeys && protectionData.clearkeys.hasOwnProperty(clearkeyID)?protectionData.clearkeys[clearkeyID]:null;if(!clearkey){throw new Error('DRM: ClearKey keyID (' + clearkeyID + ') is not known!');} // KeyIDs from CDM are not base64 padded.  Keys may or may not be padded
keyPairs.push(new _voKeyPair2['default'](clearkeyID,clearkey));}clearkeySet = new _voClearKeyKeySet2['default'](keyPairs);}return clearkeySet;}function getInitData(cp){return _CommonEncryption2['default'].parseInitDataFromContentProtection(cp,BASE64);}function getRequestHeadersFromMessage() /*message*/{return null;}function getLicenseRequestFromMessage(message){return new Uint8Array(message);}function getLicenseServerURLFromInitData() /*initData*/{return null;}function getCDMData(){return null;}function getSessionId() /*cp*/{return null;}instance = {uuid:uuid,schemeIdURI:schemeIdURI,systemString:systemString,getInitData:getInitData,getRequestHeadersFromMessage:getRequestHeadersFromMessage,getLicenseRequestFromMessage:getLicenseRequestFromMessage,getLicenseServerURLFromInitData:getLicenseServerURLFromInitData,getCDMData:getCDMData,getSessionId:getSessionId,getClearKeysFromProtectionData:getClearKeysFromProtectionData};return instance;}KeySystemClearKey.__dashjs_factory_name = 'KeySystemClearKey';exports['default'] = dashjs.FactoryMaker.getSingletonFactory(KeySystemClearKey); /* jshint ignore:line */module.exports = exports['default'];
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