아카라이브 Base64 자동 복호화
目前為
// ==UserScript==
// @name Arca base64 Autodecoder V2
// @version 1.1
// @author Laria
// @match https://arca.live/b/*/*
// @description 아카라이브 Base64 자동 복호화
// @icon https://www.google.com/s2/favicons?sz=64&domain=arca.live
// @run-at document-end
// @namespace https://greasyfork.org/users/1235854
// ==/UserScript==
/*
* 1.0 - Release
* 1.1 - Invalid character update (replace -> replaceAll)
*/
const regArr = [
/(aHR0cDovL|aHR0cHM6Ly)(\w|=|\+|\/)*(?=[^\+=\w\/])/g,
/(YUhSMGNEb3ZM|YUhSMGNITTZMe)(\w|=|\+|\/)*(?=[^\+=\w\/])/g,
/(WVVoU01HTkViM1pN|WVVoU01HTklUVFpNZ)(\w|=|\+|\/)*(?=[^\+=\w\/])/g,
]
const regInvalid = /[^\w\+\/=]/;
var Base64 = {
_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
decode : function (input) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i < input.length) {
enc1 = this._keyStr.indexOf(input.charAt(i++));
enc2 = this._keyStr.indexOf(input.charAt(i++));
enc3 = this._keyStr.indexOf(input.charAt(i++));
enc4 = this._keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
}
output = Base64._utf8_decode(output);
return output;
},
// private method for UTF-8 decoding
_utf8_decode : function (utftext) {
var string = "";
var i = 0;
var c = 0;
var c1 = 0;
var c2 = 0;
var c3 = 0;
while ( i < utftext.length ) {
c = utftext.charCodeAt(i);
if (c < 128) {
string += String.fromCharCode(c);
i++;
}
else if((c > 191) && (c < 224)) {
c2 = utftext.charCodeAt(i+1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
}
else {
c2 = utftext.charCodeAt(i+1);
c3 = utftext.charCodeAt(i+2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return string;
}
}
var hindex = 0; //total index
const max_iter = 3; //max try decode iteration attamp, def:3
var lastSelected = document;
var lastSelectedTime = Date.now();
function createLink(orig, index, url, depth) {
return '<a href="' + url
+ '" target="_blank" rel="noreferrer">' + index.toString()
+ '번째 링크 (base64 깊이: ' + depth.toString()
+ ')</a>'
+ '<br>[ <a>' + orig.toString() + '</a> ]';
}
function replacerGen(numIter) {
return function(match) {
try {
return_f = ""; //return msg
console.log(match)
var converted = Base64.decode(match);
for(var i=0; i<numIter; i++) {
converted = Base64.decode(converted);
}
hindex++;
converted = decodeURI(encodeURI(converted).replaceAll('%00', '')); //remove invalid string - �
converted = converted.split(/\r?\n/);
if (converted.length > 1) {
return_f+='[ ' + match.toString() + ' ]';
nindex = 1;
converted.forEach(function(k) {
if (k != "") {
console.log(k)
return_f+='<br>' + createLink('링크 자동 분할 : ' + nindex.toString() + '번째', hindex, k, numIter+1);
hindex++;
nindex++;
}
});
hindex--; //last components
} else return_f+=createLink(match, hindex, converted, numIter+1);
return return_f
} catch(e) {
console.log(e);
console.log('base64 변환 실패 : ' + match);
}
return '[base64 변환 실패 : ' + match + ']';
}
}
//function disabled
function selClicked(event) {
var sel = document.getSelection().toString();
if (!sel.match(regInvalid)
&& sel.length >= 10
&& lastSelectedTime + 200 < Date.now()) {
try {
var converted = Base64.decode(sel);
} catch (e) {
return;
} finally {
this.innerHTML = this.innerHTML.replace(sel, converted);
this.removeEventListener('click', selClicked);
}
}
}
(function() {
'use strict';
var article = document.getElementsByClassName("article-content")[0];
for(var i=0; i<max_iter; i++) {
article.innerHTML = article.innerHTML.replaceAll(regArr[i], replacerGen(i));
}
var comments = document.getElementsByClassName("list-area");
if(comments.length != 0) {
for(var i=0; i<max_iter; i++) {
comments[0].innerHTML = comments[0].innerHTML.replaceAll(regArr[i], replacerGen(i));
}
}
/*
document.addEventListener('selectionchange', function() {
var sel = document.getSelection().anchorNode;
if(sel) {
sel = sel.parentElement;
if(sel != lastSelected) {
lastSelected.removeEventListener('click', selClicked);
sel.addEventListener('click', selClicked);
lastSelected = sel;
lastSelectedTime = Date.now();
}
}
})*/
})();