All files / dash.js/src/streaming/protection/servers ClearKey.js

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/**
 * 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.
 */
 
/**
 * CableLabs ClearKey license server implementation
 *
 * For testing purposes and evaluating potential uses for ClearKey, we have developed
 * a dirt-simple API for requesting ClearKey licenses from a remote server.
 *
 * @implements LicenseServer
 * @class
 */
import KeyPair from '../vo/KeyPair.js';
import ClearKeyKeySet from '../vo/ClearKeyKeySet.js';
import FactoryMaker from '../../../core/FactoryMaker.js';
 
function ClearKey() {
 
    let instance;
 
    function getServerURLFromMessage(url /* message, messageType*/) {
        return url;
    }
 
    function getHTTPMethod(/*messageType*/) {
        return 'POST';
    }
 
    function getResponseType(/*keySystemStr*/) {
        return 'json';
    }
 
    function getLicenseMessage(serverResponse/*, keySystemStr, messageType*/) {
        if (!serverResponse.hasOwnProperty('keys')) {
            return null;
        }
        let keyPairs = [];
        for (let i = 0; i < serverResponse.keys.length; i++) {
            let keypair = serverResponse.keys[i];
            let keyid = keypair.kid.replace(/=/g, '');
            let key = keypair.k.replace(/=/g, '');
 
            keyPairs.push(new KeyPair(keyid, key));
        }
        return new ClearKeyKeySet(keyPairs);
    }
 
    function getErrorResponse(serverResponse/*, keySystemStr, messageType*/) {
        return String.fromCharCode.apply(null, new Uint8Array(serverResponse));
    }
 
    instance = {
        getServerURLFromMessage,
        getHTTPMethod,
        getResponseType,
        getLicenseMessage,
        getErrorResponse
    };
 
    return instance;
}
 
ClearKey.__dashjs_factory_name = 'ClearKey';
export default FactoryMaker.getSingletonFactory(ClearKey);