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WofWca
da5309124e
It affects the "loading" stage Related: https://github.com/deltachat/deltachat-desktop/pull/3411
145 lines
4.7 KiB
HTML
145 lines
4.7 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta name="color-scheme" content="dark light">
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<style>
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html,
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body {
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margin: 0;
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padding: 0;
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}
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.iframe-container {
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overflow: hidden;
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height: 100vh;
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width: 100vw;
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position: relative;
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}
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.iframe-container iframe {
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border: 0;
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height: 100%;
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left: 0;
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position: absolute;
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top: 0;
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width: 100%;
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}
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#progress {
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width: 100%;
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}
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</style>
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</head>
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<body>
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<div id="loading">
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<progress id="progress" max="500" value="0"></progress>
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</div>
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<div class="iframe-container">
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<iframe id="frame"></iframe>
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</div>
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<iframe
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id="test-isolated-sandbox-context"
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sandbox="allow-scripts"
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src="./sandboxed_iframe_rtcpeerconnection_check_5965668501706.html"
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style="display: none"
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></iframe>
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<script>
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const thisUnchangable = (async () => {
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const connections = [];
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const loadingProgress = document.getElementById("progress");
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const loadingDiv = document.getElementById("loading");
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const iframe = document.getElementById("frame");
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const isolatedContextTest = document.getElementById(
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"test-isolated-sandbox-context"
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);
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const cert = {
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certificates: [
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await RTCPeerConnection.generateCertificate({
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name: "ECDSA",
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namedCurve: "P-256",
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}),
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],
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};
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console.log("WEBRTC-WG: allocating");
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loadingProgress.value = 0;
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while (connections.length < 500) {
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try {
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connections.push(new RTCPeerConnection(cert));
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if (connections.length%50 == 0) {
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loadingProgress.value = connections.length;
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await new Promise((res) => setTimeout(res));
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}
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} catch (error) {
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loadingProgress.value++;
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new Array(1024*1024).fill(0);
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await new Promise((res) => setTimeout(res, 500));
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console.log("WEBRTC-WG: waiting for gc");
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}
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}
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console.log("WEBRTC-WG: done");
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try {
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connections.push(new RTCPeerConnection());
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console.log("Error: was able to create more than 500 connections");
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loadingDiv.innerText =
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"Error: was not able to block webrtc ERROR_A";
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} catch (error) {
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/** @type {Promise<boolean>} */
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const sandboxedIframeCheckIsGoodPromise = new Promise(resolve => {
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/** @type {HTMLIFrameElement} */
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const sandboxedIframe = document.getElementById("test-isolated-sandbox-context");
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const askIframeToPerformCheck = () => {
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// Why `"*"`? See the comment below.
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sandboxedIframe.contentWindow.postMessage("performCheck", "*");
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};
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/** @type {(e: MessageEvent) => void} */
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const messageListener = (e) => {
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// Checking `event.origin !== location.origin` just in case would be safer,
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// but `sandbox`ed iframes seem to send messages with `origin` set to `null`,
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// so we skip the check, relying on the fact that we don't actually load any
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// untrusted scripts that could `postMessage` before this check is completed.
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// And we can't just add `sandbox="allow-same-origin` because it could turn off
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// process-isolation:
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// https://chromium-review.googlesource.com/c/chromium/src/+/3416475
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if (event.source !== sandboxedIframe.contentWindow) {
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return;
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}
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switch (event.data.msgType) {
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case "ready": {
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askIframeToPerformCheck();
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break;
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}
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case "result": {
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resolve(event.data.rtcpcCreationFailed);
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sandboxedIframe.remove();
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window.removeEventListener("message", messageListener);
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break;
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}
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}
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}
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window.addEventListener("message", messageListener);
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askIframeToPerformCheck();
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});
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if (await sandboxedIframeCheckIsGoodPromise !== true) {
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console.log(
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"Error: was able to create more than 500 connections, iframe is probably isolated"
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);
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loadingDiv.innerText =
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"Error: was not able to block webrtc ERROR_C";
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} else {
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loadingDiv.innerHTML = "";
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iframe.src = "index.html";
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}
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}
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return Object.freeze({
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len: () => {
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return connections.length;
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},
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});
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})();
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</script>
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</body>
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</html>
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