content_script.js

window.addEventListener("PassToBackground", function(evt) {
  chrome.runtime.sendMessage(evt.detail.item,response => {
    var val=response.value;
    if (!val) val=null;
    var event = new CustomEvent("BackgroundReply_"+evt.detail.id, {detail: val});
    window.dispatchEvent(event);}
    );
}, false);

injectScripts();
async function injectScripts() 
{
    await injectScript('lib/pbf.3.0.5.min.js');
    await injectScript('lib/cryptojs-aes_0.2.0.min.js');
    await injectScript('protobuf-generated/license_protocol.proto.js');
   // await injectScript('wasm/wasm_gsr.js');
    await injectScript('content_key_decryption.js');
    await injectScript('eme_interception.js');
}


function injectScript(scriptName) 
{
    return new Promise(function(resolve, reject) 
    {
        var s = document.createElement('script');
        s.src = chrome.extension.getURL(scriptName);
        s.onload = function() {
            this.parentNode.removeChild(this);
            resolve(true);
        };
        (document.head||document.documentElement).appendChild(s);
    });
}