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Encodes a secret message inside another.
// ==UserScript==
// @name Secret Message Encoder
// @name:de Geheime Nachrichten Kodierer
// @namespace https://sme-siz.pages.dev
// @version 0.1.5
// @description Encodes a secret message inside another.
// @description:de Kodiert eine geheime Nachricht in einer anderen.
// @author LuisAFK
// @match *://*/*
// @icon https://sme-siz.pages.dev/assets/favicon96.png
// @website https://sme-siz.pages.dev
// @grant none
// @supportURL https://github.com/lafkpages/sme/issues
// @run-at document-idle
// @license GPLv3
// ==/UserScript==
(() => {
const one = "\u200b";
const zero = "\u200c";
const oneone = "\u200e";
const zerozero = "\u200f";
const onezero = "\u2061";
const zeroone = "\u2062";
const zerozerozero = "\u2063";
const oneoneone = "\u2064";
const secretsRegEx = new RegExp(`[${zerozerozero}${oneoneone}${zerozero}${oneone}${zeroone}${onezero}${zero}${one}]+`);
function stringToBin(s) {
let b = "";
for (const c of s) {
b += c.charCodeAt(0).toString(2).padStart(8, 0);
}
return b;
}
function binToString(b) {
let s = "";
for (const c of b.match(/[01]{8}/g)) {
s += String.fromCharCode(parseInt(c, 2));
}
return s;
}
function stringToSecretBin(s, compress = true) {
let b = stringToBin(s);
if (compress) {
b = b.replace(/000/g, zerozerozero);
b = b.replace(/111/g, oneoneone);
b = b.replace(/01/g, zeroone);
b = b.replace(/10/g, onezero);
b = b.replace(/00/g, zerozero);
b = b.replace(/11/g, oneone);
}
b = b.replace(/0/g, zero);
b = b.replace(/1/g, one);
return b;
}
function secretBinToString(b) {
b = b.replace(new RegExp(zerozerozero, "g"), "000");
b = b.replace(new RegExp(oneoneone, "g"), "111");
b = b.replace(new RegExp(zeroone, "g"), "01");
b = b.replace(new RegExp(onezero, "g"), "10");
b = b.replace(new RegExp(zerozero, "g"), "00");
b = b.replace(new RegExp(oneone, "g"), "11");
b = b.replace(new RegExp(zero, "g"), "0");
b = b.replace(new RegExp(one, "g"), "1");
b = binToString(b);
return b;
}
function encodeSecret(visible, secret, compress = false) {
const s = stringToSecretBin(secret, compress);
return `${visible[0] || ""}${s}${visible.substr(1)}`;
}
function decodeSecret(s) {
s = s.match(secretsRegEx)[0];
return secretBinToString(s);
}
const hideTransform = "translateY(calc(-100% - 50px))";
const div = document.createElement("div");
div.id = "sme-inject-notif";
div.style.position = "fixed";
div.style.top = "20px";
div.style.right = "20px";
div.style.padding = "10px";
div.style.zIndex = "99999";
div.style.background = "wheat";
div.style.border = "1px solid black";
div.style.borderRadius = "5px";
div.style.transition = "transform 0.5s ease-in-out 0s";
div.style.transform = hideTransform;
div.style.whiteSpace = "pre-line";
document.body.appendChild(div);
setInterval(() => {
const selectedText = window.getSelection().toString();
let decodedSecret = null;
if (selectedText) {
try {
decodedSecret = decodeSecret(selectedText);
} catch {}
}
if (decodedSecret) {
div.style.transform = "translateY(0px)";
div.textContent = decodedSecret;
} else {
div.style.transform = hideTransform;
}
}, 1e3);
})();