@l5i/dashjs
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A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.
75 lines (74 loc) • 10 kB
JavaScript
/**
* 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.
*/ /**
* Microsoft PlayReady DRM
*
* @class
* @implements KeySystem
*/'use strict';Object.defineProperty(exports,'__esModule',{value:true});function _interopRequireDefault(obj){return obj && obj.__esModule?obj:{'default':obj};}var _CommonEncryption=require('../CommonEncryption');var _CommonEncryption2=_interopRequireDefault(_CommonEncryption);var _constantsProtectionConstants=require('../../constants/ProtectionConstants');var _constantsProtectionConstants2=_interopRequireDefault(_constantsProtectionConstants);var uuid='9a04f079-9840-4286-ab92-e65be0885f95';var systemString=_constantsProtectionConstants2['default'].PLAYREADY_KEYSTEM_STRING;var schemeIdURI='urn:uuid:' + uuid;var PRCDMData='<PlayReadyCDMData type="LicenseAcquisition"><LicenseAcquisition version="1.0" Proactive="false"><CustomData encoding="base64encoded">%CUSTOMDATA%</CustomData></LicenseAcquisition></PlayReadyCDMData>';var protData=undefined;function KeySystemPlayReady(config){config = config || {};var instance=undefined;var messageFormat='utf16';var BASE64=config.BASE64;function checkConfig(){if(!BASE64 || !BASE64.hasOwnProperty('decodeArray') || !BASE64.hasOwnProperty('decodeArray')){throw new Error('Missing config parameter(s)');}}function getRequestHeadersFromMessage(message){var msg=undefined,xmlDoc=undefined;var headers={};var parser=new DOMParser();var dataview=messageFormat === 'utf16'?new Uint16Array(message):new Uint8Array(message);msg = String.fromCharCode.apply(null,dataview);xmlDoc = parser.parseFromString(msg,'application/xml');var headerNameList=xmlDoc.getElementsByTagName('name');var headerValueList=xmlDoc.getElementsByTagName('value');for(var i=0;i < headerNameList.length;i++) {headers[headerNameList[i].childNodes[0].nodeValue] = headerValueList[i].childNodes[0].nodeValue;} // some versions of the PlayReady CDM return 'Content' instead of 'Content-Type'.
// this is NOT w3c conform and license servers may reject the request!
// -> rename it to proper w3c definition!
if(headers.hasOwnProperty('Content')){headers['Content-Type'] = headers.Content;delete headers.Content;} // some devices (Ex: LG SmartTVs) require content-type to be defined
if(!headers.hasOwnProperty('Content-Type')){headers['Content-Type'] = 'text/xml; charset=' + messageFormat;}return headers;}function getLicenseRequestFromMessage(message){var licenseRequest=null;var parser=new DOMParser();var dataview=messageFormat === 'utf16'?new Uint16Array(message):new Uint8Array(message);checkConfig();var msg=String.fromCharCode.apply(null,dataview);var xmlDoc=parser.parseFromString(msg,'application/xml');if(xmlDoc.getElementsByTagName('Challenge')[0]){var Challenge=xmlDoc.getElementsByTagName('Challenge')[0].childNodes[0].nodeValue;if(Challenge){licenseRequest = BASE64.decode(Challenge);}}else if(xmlDoc.getElementsByTagName('parsererror').length){ // In case it is not an XML doc, return the message itself
// There are CDM implementations of some devices (example: some smartTVs) that
// return directly the challenge without wrapping it in an xml doc
return message;}return licenseRequest;}function getLicenseServerURLFromInitData(initData){if(initData){var data=new DataView(initData);var numRecords=data.getUint16(4,true);var offset=6;var parser=new DOMParser();for(var i=0;i < numRecords;i++) { // Parse the PlayReady Record header
var recordType=data.getUint16(offset,true);offset += 2;var recordLength=data.getUint16(offset,true);offset += 2;if(recordType !== 0x0001){offset += recordLength;continue;}var recordData=initData.slice(offset,offset + recordLength);var record=String.fromCharCode.apply(null,new Uint16Array(recordData));var xmlDoc=parser.parseFromString(record,'application/xml'); // First try <LA_URL>
if(xmlDoc.getElementsByTagName('LA_URL')[0]){var laurl=xmlDoc.getElementsByTagName('LA_URL')[0].childNodes[0].nodeValue;if(laurl){return laurl;}} // Optionally, try <LUI_URL>
if(xmlDoc.getElementsByTagName('LUI_URL')[0]){var luiurl=xmlDoc.getElementsByTagName('LUI_URL')[0].childNodes[0].nodeValue;if(luiurl){return luiurl;}}}}return null;}function getInitData(cpData){ // * desc@ getInitData
// * generate PSSH data from PROHeader defined in MPD file
// * PSSH format:
// * size (4)
// * box type(PSSH) (8)
// * Protection SystemID (16)
// * protection system data size (4) - length of decoded PROHeader
// * decoded PROHeader data from MPD file
var PSSHBoxType=new Uint8Array([0x70,0x73,0x73,0x68,0x00,0x00,0x00,0x00]); //'PSSH' 8 bytes
var playreadySystemID=new Uint8Array([0x9a,0x04,0xf0,0x79,0x98,0x40,0x42,0x86,0xab,0x92,0xe6,0x5b,0xe0,0x88,0x5f,0x95]);var byteCursor=0;var uint8arraydecodedPROHeader=null;var PROSize=undefined,PSSHSize=undefined,PSSHBoxBuffer=undefined,PSSHBox=undefined,PSSHData=undefined;checkConfig(); // Handle common encryption PSSH
if('pssh' in cpData){return _CommonEncryption2['default'].parseInitDataFromContentProtection(cpData,BASE64);} // Handle native MS PlayReady ContentProtection elements
if('pro' in cpData){uint8arraydecodedPROHeader = BASE64.decodeArray(cpData.pro.__text);}else if('prheader' in cpData){uint8arraydecodedPROHeader = BASE64.decodeArray(cpData.prheader.__text);}else {return null;}PROSize = uint8arraydecodedPROHeader.length;PSSHSize = 0x4 + PSSHBoxType.length + playreadySystemID.length + 0x4 + PROSize;PSSHBoxBuffer = new ArrayBuffer(PSSHSize);PSSHBox = new Uint8Array(PSSHBoxBuffer);PSSHData = new DataView(PSSHBoxBuffer);PSSHData.setUint32(byteCursor,PSSHSize);byteCursor += 0x4;PSSHBox.set(PSSHBoxType,byteCursor);byteCursor += PSSHBoxType.length;PSSHBox.set(playreadySystemID,byteCursor);byteCursor += playreadySystemID.length;PSSHData.setUint32(byteCursor,PROSize);byteCursor += 0x4;PSSHBox.set(uint8arraydecodedPROHeader,byteCursor);byteCursor += PROSize;return PSSHBox.buffer;} /**
* It seems that some PlayReady implementations return their XML-based CDM
* messages using UTF16, while others return them as UTF8. Use this function
* to modify the message format to expect when parsing CDM messages.
*
* @param {string} format the expected message format. Either "utf8" or "utf16".
* @throws {Error} Specified message format is not one of "utf8" or "utf16"
*/function setPlayReadyMessageFormat(format){if(format !== 'utf8' && format !== 'utf16'){throw new Error('Illegal PlayReady message format! -- ' + format);}messageFormat = format;} /**
* Initialize the Key system with protection data
* @param {Object} protectionData the protection data
*/function init(protectionData){if(protectionData){protData = protectionData;}} /**
* Get Playready Custom data
*/function getCDMData(){var customData=undefined,cdmData=undefined,cdmDataBytes=undefined,i=undefined;checkConfig();if(protData && protData.cdmData){ // Convert custom data into multibyte string
customData = [];for(i = 0;i < protData.cdmData.length;++i) {customData.push(protData.cdmData.charCodeAt(i));customData.push(0);}customData = String.fromCharCode.apply(null,customData); // Encode in Base 64 the custom data string
customData = BASE64.encode(customData); // Initialize CDM data with Base 64 encoded custom data
// (see https://msdn.microsoft.com/en-us/library/dn457361.aspx)
cdmData = PRCDMData.replace('%CUSTOMDATA%',customData); // Convert CDM data into multibyte characters
cdmDataBytes = [];for(i = 0;i < cdmData.length;++i) {cdmDataBytes.push(cdmData.charCodeAt(i));cdmDataBytes.push(0);}return new Uint8Array(cdmDataBytes).buffer;}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,setPlayReadyMessageFormat:setPlayReadyMessageFormat,init:init};return instance;}KeySystemPlayReady.__dashjs_factory_name = 'KeySystemPlayReady';exports['default'] = dashjs.FactoryMaker.getSingletonFactory(KeySystemPlayReady); /* jshint ignore:line */module.exports = exports['default'];
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