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web/bookmarklet

This commit is contained in:
Oystein Kristoffer Tveit 2024-09-05 18:49:14 +02:00
parent cf8737a75e
commit 8228f24185
Signed by: oysteikt
GPG Key ID: 9F2F7D8250F35146
2 changed files with 87 additions and 0 deletions
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75
web/bookmarklet/index.html Normal file
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>picoCTF - picoGym | Bookmarklet Challenge</title>
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
<style>
body {
font-family: "Lucida Console", Monaco, monospace;
}
h1,
p {
color: #000000;
}
</style>
<!-- Sources: https://picoctf.org | https://undraw.co -->
</head>
<body class="picoctf{}" style="margin: 0">
<div class="picoctf{}" style="margin: 0; padding: 0; background-color: #757575; display:auto; height:40%">
<a class="picoctf{}" href="/"><img src="picoctf-logo-horizontal-white.svg" alt="picoCTF logo"
style="display: inline-block; width:160px; height:90px; padding-left: 30px"></a>
</div>
<center>
<br class="picoctf{}">
<br class="picoctf{}">
<div class="picoctf{}"
style="padding-top:30px; border-radius:3%; box-shadow: 0px 5px 10px #0000004d; width: 50%; align-self: center;">
<img class="picoctf{}" src="hero.svg" alt="flag art" style="width: 150px; height: 150px;">
<div class="picoctf{}" style="width:85%">
<h2 class="picoctf{}">Welcome to my flag distribution website!</h2>
<div class="picoctf{}" style="width:70%">
<p class="picoctf{}">If you're reading this, your browser has succesfully received the flag.</p>
<p class="picoctf{}">Here's a bookmarklet for you to try:</p>
<textarea id="bookmarkletCode" rows="3" cols="45" style="color:#000000" readonly>
javascript:(function() {
var encryptedFlag = "àÒÆަȬë٣֖ÓÚåÛÑ¢ÕӜÒËɧœ©™í";
var key = "picoctf";
var decryptedFlag = "";
for (var i = 0; i < encryptedFlag.length; i++) {
decryptedFlag += String.fromCharCode((encryptedFlag.charCodeAt(i) - key.charCodeAt(i % key.length) + 256) % 256);
}
alert(decryptedFlag);
})();
</textarea>
<div id="notice" style="display: none; color: green;">Code copied to clipboard!</div>
<script>
var codeTextArea = document.getElementById("bookmarkletCode");
var notice = document.getElementById("notice");
codeTextArea.addEventListener("click", function () {
codeTextArea.select();
document.execCommand("copy");
notice.style.display = "block";
setTimeout(function () {
notice.style.display = "none";
}, 2000);
});
</script>
</div>
</div>
<br class="picoctf{}">
</center>
</body>
</html>

12
web/bookmarklet/solve.js Executable file
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#!/usr/bin/env nix-shell
/*
#!nix-shell -i node -p nodejs
*/
var encryptedFlag = "àÒÆަȬë٣֖ÓÚåÛÑ¢ÕӜÒËɧœ©™í";
var key = "picoctf";
var decryptedFlag = "";
for (var i = 0; i < encryptedFlag.length; i++) {
decryptedFlag += String.fromCharCode((encryptedFlag.charCodeAt(i) - key.charCodeAt(i % key.length) + 256) % 256);
}
console.log(decryptedFlag)