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mitsocket.js

/* mitsocket.js
 * Created on: Tue, 12 Oct 2021
 *  ____   __  ____  __
 * (  _ \ /. |(  _ \/  )
 *  )___/(_  _))___/ )(
 * (__)    (_)(__)  (__)
 *
 * Description:
 *  A reimplementation of WebSocket for MITM
 *  Licensed under GPLv3 and should not be used
 *  for illegal activity. Inside this file you
 *  will see multiple [ICH] tags for Insert Code
 *  Here. Those tags can be used to handle the different
 *  implementations :) This script can be used as a
 *  chrome extention to infect pages just place this file
 *  in a directory create a 2nd file named manifest.json,
 *  copy from bellow, and remove the <REMOVEME> tags.
 *  Then do your edit to the file copy the class minify
 *  it and edit the end of the file to have the minify
 *  version inside of the ss.innerHTML variable.
 *
 *  Read more here: https://leosmith.xyz/blog/websocket-mitm.html
 *
 * Manifest file:
 *  {
 *    "manifest_version": 2,
 *    "name": "web_socket_mitm",
 *    "description":"A websocket man in the middle extention",
 *    "version": "0.1",
 *    "author": "p4p1",
 *    "content_scripts": [{
 *      "matches": ["http://*<REMOVEME>/*", "https://*<REMOVEME>/*"],
 *      "run_at":"document_start",
 *      "js": ["./mitsocket.js"]
 *    }]
 *  }
 */

"use strict";

class WebSocket {
  constructor(url, protocols) {
    /* This will create the websocket to send data to */
    this.ws = new window.WebSocket(url, protocols);
    /* All of the functions set by the user are saved here */
    this.user_onmessage = undefined;
    this.user_onerror = undefined;
    this.user_onopen = undefined;
  }

  set onopen(eventfunc) {
    this.user_onopen = eventfunc;
    this.ws.onopen = function(event) {
      // [ICH]
      eventfunc(event);
    };
  }

  set onerror(eventfunc) {
    this.user_onerror = eventfunc;
    this.ws.onerror = function(event) {
      // [ICH]
      eventfunc(event);
    };
  }

  close(code, reason) {
    this.ws.close(code, reason);
  }

  send(msg) {
    // [ICH]
    this.ws.send(msg);
  }

  set onmessage(eventfunc) {
    this.user_onmessage = eventfunc;
    this.ws.onmessage = function(event) {
    // [ICH]
      eventfunc(event);
    };
  }

  /*
   * The rest is here for compatibility but can be edited as much as the others
   */
  get onopen() {
    return this.user_onopen;
  }
  get onerror() {
    return this.user_onerror;
  }
  get onmessage() {
    return this.user_onmessage
  }
  get url() {
    return this.ws.url;
  }
  get readyState() {
    return this.ws.readyState;
  }
  get protocol() {
    return this.ws.protocol;
  }
  set binaryType(type) {
    this.ws.binaryType = type;
  }
  get binaryType() {
    return this.ws.binaryType;
  }
  get bufferedAmount() {
    return this.ws.bufferedAmount;
  }
  get extensions() {
    return this.ws.extensions;
  }
}

/* WARNING
 * Take above code parse it to a one liner to then be used inside of a chrome
 * extention! To parse it to a one liner use the following website:
 * https://jsminify.org
 */
//var ss = document.createElement("script");
//ss.innerHTML= "class WebSocket{constructor(url,protocols){this.ws=new window.WebSocket(url,protocols);this.user_onmessage=undefined;this.user_onerror=undefined;this.user_onopen=undefined}set onopen(eventfunc){this.user_onopen=eventfunc;this.ws.onopen=function(event){eventfunc(event)}}set onerror(eventfunc){this.user_onerror=eventfunc;this.ws.onerror=function(event){eventfunc(event)}}close(code,reason){this.ws.close(code,reason)}send(msg){this.ws.send(msg)}set onmessage(eventfunc){this.user_onmessage=eventfunc;this.ws.onmessage=function(event){eventfunc(event)}}get onopen(){return this.user_onopen}get onerror(){return this.user_onerror}get onmessage(){return this.user_onmessage}get url(){return this.ws.url}get readyState(){return this.ws.readyState}get protocol(){return this.ws.protocol}set binaryType(type){this.ws.binaryType=type}get binaryType(){return this.ws.binaryType}get bufferedAmount(){return this.ws.bufferedAmount}get extensions(){return this.ws.extensions}}";
//document.documentElement.appendChild(ss);