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jsfuck.js
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jsfuck.js
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/*! JSFuck 0.5.0 - http://jsfuck.com */
(function(self){
const MIN = 32, MAX = 126;
const SIMPLE = {
'false': '![]',
'true': '!![]',
'undefined': '[][[]]',
'NaN': '+[![]]',
'Infinity': '+(+!+[]+(!+[]+[])[!+[]+!+[]+!+[]]+[+!+[]]+[+[]]+[+[]]+[+[]])' // +"1e1000"
};
const CONSTRUCTORS = {
'Array': '[]',
'Number': '(+[])',
'String': '([]+[])',
'Boolean': '(![])',
'Function': '[]["flat"]',
'RegExp': 'Function("return/"+false+"/")()',
'Object': '[]["entries"]()'
};
const MAPPING = {
'a': '(false+"")[1]',
'b': '([]["entries"]()+"")[2]',
'c': '([]["flat"]+"")[3]',
'd': '(undefined+"")[2]',
'e': '(true+"")[3]',
'f': '(false+"")[0]',
'g': '(false+[0]+String)[20]',
'h': '(+(101))["to"+String["name"]](21)[1]',
'i': '([false]+undefined)[10]',
'j': '([]["entries"]()+"")[3]',
'k': '(+(20))["to"+String["name"]](21)',
'l': '(false+"")[2]',
'm': '(Number+"")[11]',
'n': '(undefined+"")[1]',
'o': '(true+[]["flat"])[10]',
'p': '(+(211))["to"+String["name"]](31)[1]',
'q': '("")["fontcolor"]([0]+false+")[20]',
'r': '(true+"")[1]',
's': '(false+"")[3]',
't': '(true+"")[0]',
'u': '(undefined+"")[0]',
'v': '(+(31))["to"+String["name"]](32)',
'w': '(+(32))["to"+String["name"]](33)',
'x': '(+(101))["to"+String["name"]](34)[1]',
'y': '(NaN+[Infinity])[10]',
'z': '(+(35))["to"+String["name"]](36)',
'A': '(NaN+[]["entries"]())[11]',
'B': '(+[]+Boolean)[10]',
'C': 'Function("return escape")()(("")["italics"]())[2]',
'D': 'Function("return escape")()([]["flat"])["slice"]("-1")',
'E': '(RegExp+"")[12]',
'F': '(+[]+Function)[10]',
'G': '(false+Function("return Date")()())[30]',
'H': null,
'I': '(Infinity+"")[0]',
'J': null,
'K': null,
'L': null,
'M': '(true+Function("return Date")()())[30]',
'N': '(NaN+"")[0]',
'O': '(+[]+Object)[10]',
'P': null,
'Q': null,
'R': '(+[]+RegExp)[10]',
'S': '(+[]+String)[10]',
'T': '(NaN+Function("return Date")()())[30]',
'U': '(NaN+Object()["to"+String["name"]]["call"]())[11]',
'V': null,
'W': null,
'X': null,
'Y': null,
'Z': null,
' ': '(NaN+[]["flat"])[11]',
'!': null,
'"': '("")["fontcolor"]()[12]',
'#': null,
'$': null,
'%': 'Function("return escape")()([]["flat"])[21]',
'&': '("")["fontcolor"](")[13]',
'\'': null,
'(': '([]["flat"]+"")[13]',
')': '([0]+false+[]["flat"])[20]',
'*': null,
'+': '(+(+!+[]+(!+[]+[])[!+[]+!+[]+!+[]]+[+!+[]]+[+[]]+[+[]])+[])[2]',
',': '[[]]["concat"]([[]])+""',
'-': '(+(.+[0000001])+"")[2]',
'.': '(+(+!+[]+[+!+[]]+(!![]+[])[!+[]+!+[]+!+[]]+[!+[]+!+[]]+[+[]])+[])[+!+[]]',
'/': '(false+[0])["italics"]()[10]',
':': '(RegExp()+"")[3]',
';': '("")["fontcolor"](NaN+")[21]',
'<': '("")["italics"]()[0]',
'=': '("")["fontcolor"]()[11]',
'>': '("")["italics"]()[2]',
'?': '(RegExp()+"")[2]',
'@': null,
'[': '([]["entries"]()+"")[0]',
'\\': '(RegExp("/")+"")[1]',
']': '([]["entries"]()+"")[22]',
'^': null,
'_': null,
'`': null,
'{': '(true+[]["flat"])[20]',
'|': null,
'}': '([]["flat"]+"")["slice"]("-1")',
'~': null
};
const GLOBAL = 'Function("return this")()';
function fillMissingDigits(){
var output, number, i;
for (number = 0; number < 10; number++){
output = "+[]";
if (number > 0){ output = "+!" + output; }
for (i = 1; i < number; i++){ output = "+!+[]" + output; }
if (number > 1){ output = output.substr(1); }
MAPPING[number] = "[" + output + "]";
}
}
function replaceMap(){
var character = "", value, i, key;
function replace(pattern, replacement){
value = value.replace(
new RegExp(pattern, "gi"),
replacement
);
}
function digitReplacer(_,x) { return MAPPING[x]; }
function numberReplacer(_,y) {
var values = y.split("");
var head = +(values.shift());
var output = "+[]";
if (head > 0){ output = "+!" + output; }
for (i = 1; i < head; i++){ output = "+!+[]" + output; }
if (head > 1){ output = output.substr(1); }
return [output].concat(values).join("+").replace(/(\d)/g, digitReplacer);
}
for (i = MIN; i <= MAX; i++){
character = String.fromCharCode(i);
value = MAPPING[character];
if(!value) {continue;}
for (key in CONSTRUCTORS){
replace("\\b" + key, CONSTRUCTORS[key] + '["constructor"]');
}
for (key in SIMPLE){
replace(key, SIMPLE[key]);
}
replace('(\\d\\d+)', numberReplacer);
replace('\\((\\d)\\)', digitReplacer);
replace('\\[(\\d)\\]', digitReplacer);
replace("GLOBAL", GLOBAL);
replace('\\+""', "+[]");
replace('""', "[]+[]");
MAPPING[character] = value;
}
}
function replaceStrings(){
var regEx = /[^\[\]\(\)\!\+]{1}/g,
all, value, missing,
count = MAX - MIN;
function findMissing(){
var all, value, done = false;
missing = {};
for (all in MAPPING){
value = MAPPING[all];
if (value && value.match(regEx)){
missing[all] = value;
done = true;
}
}
return done;
}
function mappingReplacer(a, b) {
return b.split("").join("+");
}
function valueReplacer(c) {
return missing[c] ? c : MAPPING[c];
}
for (all in MAPPING){
if (MAPPING[all]){
MAPPING[all] = MAPPING[all].replace(/\"([^\"]+)\"/gi, mappingReplacer);
}
}
while (findMissing()){
for (all in missing){
value = MAPPING[all];
value = value.replace(regEx, valueReplacer);
MAPPING[all] = value;
missing[all] = value;
}
if (count-- === 0){
console.error("Could not compile the following chars:", missing);
}
}
}
function escapeSequence(c) {
var cc = c.charCodeAt(0);
if (cc < 256) {
return '\\' + cc.toString(8);
} else {
var cc16 = cc.toString(16);
return '\\u' + ('0000' + cc16).substring(cc16.length);
}
}
function escapeSequenceForReplace(c) {
return escapeSequence(c).replace('\\', 't');
}
function encode(input, wrapWithEval, runInParentScope){
var output = [];
if (!input){
return "";
}
var unmappped = ''
for(var k in MAPPING) {
if (MAPPING[k]){
unmappped += k;
}
}
unmappped = unmappped.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
unmappped = new RegExp('[^' + unmappped + ']','g');
var unmappedCharactersCount = (input.match(unmappped) || []).length;
if (unmappedCharactersCount > 1) {
// Without this optimization one unmapped character has encoded length
// of about 3600 characters. Every additional unmapped character adds
// 2000 to the total length. For example, the length of `~` is 3605,
// `~~` is 5600, and `~~~` is 7595.
//
// The loader with replace has encoded length of about 5300 characters
// and every additional character adds 100 to the total length.
// In the same example the length of `~~` becomes 5371 and `~~~` -- 5463.
//
// So, when we have more than one unmapped character we want to encode whole input
// except select characters (that have encoded length less than about 70)
// into an escape sequence.
//
// NOTE: `t` should be escaped!
input = input.replace(/[^0123456789.adefilnrsuN]/g, escapeSequenceForReplace);
} else if (unmappedCharactersCount > 0) {
//Because we will wrap the input into a string we need to escape Backslash
// and Double quote characters (we do not need to worry about other characters
// because they are not mapped explicitly).
// The JSFuck-encoded representation of `\` is 2121 symbols,
// so escaped `\` is 4243 symbols and escaped `"` is 2261 symbols
// however the escape sequence of that characters are
// 2168 and 2155 symbols respectively, so it's more practical to
// rewrite them as escape sequences.
input = input.replace(/["\\]/g, escapeSequence);
//Convert all unmapped characters to escape sequence
input = input.replace(unmappped, escapeSequence);
}
var r = "";
for (var i in SIMPLE) {
r += i + "|";
}
r+= ".";
input.replace(new RegExp(r, 'g'), function(c) {
var replacement = SIMPLE[c];
if (replacement) {
output.push("(" + replacement + "+[])");
} else {
replacement = MAPPING[c];
if (replacement){
output.push(replacement);
} else {
throw new Error('Found unmapped character: ' + c);
}
}
});
output = output.join("+");
if (/^\d$/.test(input)){
output += "+[]";
}
if (unmappedCharactersCount > 1) {
// replace `t` with `\\`
output = "(" + output + ")[" + encode("split") + "](" + encode ("t") + ")[" + encode("join") +"](" + encode("\\") + ")";
}
if (unmappedCharactersCount > 0) {
output = "[][" + encode("flat") + "]"+
"[" + encode("constructor") + "]" +
"(" + encode("return\"") + "+" + output + "+" + encode("\"") + ")()";
}
if (wrapWithEval){
if (runInParentScope){
output = "[][" + encode("flat") + "]" +
"[" + encode("constructor") + "]" +
"(" + encode("return eval") + ")()" +
"(" + output + ")";
} else {
output = "[][" + encode("flat") + "]" +
"[" + encode("constructor") + "]" +
"(" + output + ")()";
}
}
return output;
}
fillMissingDigits();
replaceMap();
replaceStrings();
self.JSFuck = {
encode: encode
};
})(typeof(exports) === "undefined" ? window : exports);