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fix (n-token): yet again YouTube added new functions that do exactly the same thing as before but in a different way

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LuanRT
2021-11-13 01:04:03 -03:00
parent 5670228a4f
commit 771c6050c4
2 changed files with 25 additions and 7 deletions
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7
lib/Constants.js
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@@ -95,7 +95,7 @@ module.exports = {
NORMAL: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_'.split(''),
REVERSE: '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_'.split('')
},
FUNCS_REGEX: /d\.push\(e\)|d\.reverse\(\)|d\[0\]\)\[0\]\)|f=d\[0];d\[0\]|d\.length;d\.splice\(e,1\)|function\(d\){for\(var|reverse\(\)\.forEach|unshift\(d\.pop\(\)\)|switch/,
FUNCS_REGEX: /d\.push\(e\)|d\.reverse\(\)|d\[0\]\)\[0\]\)|f=d\[0];d\[0\]|d\.length;d\.splice\(e,1\)|function\(\){for\(var|function\(d,e,f\){var h=f|function\(d\){for\(var|reverse\(\)\.forEach|unshift\(d\.pop\(\)\)|function\(d,e\){for\(var f/,
FUNCS: {
PUSH: 'd.push(e)',
REVERSE_1: 'd.reverse()',
@@ -105,12 +105,15 @@ module.exports = {
SWAP0_2: 'f=d[0];d[0]',
ROTATE_1: 'reverse().forEach',
ROTATE_2: 'unshift(d.pop())',
TRANSLATE: 'switch'
BASE64_DIA: 'function(){for(var',
TRANSLATE_1: 'function(d,e){for(var f',
TRANSLATE_2: 'function(d,e,f){var h=f'
},
// Helper functions, felt like Utils.js wasn't the right place for them:
formatNTransformData: (data) => {
return data
.replace(/function\(d,e\)/g, '"function(d,e)').replace(/function\(d\)/g, '"function(d)')
.replace(/function\(\)/, '"function()').replace(/function\(d,e,f\)/g, '"function(d,e,f)')
.replace(/,b,/g, ',"b",').replace(/,b/g, ',"b"').replace(/b,/g, '"b",').replace(/b]/g, '"b"]')
.replace(/\[b/g, '["b"').replace(/}]/g, '"]').replace(/},/g, '}",').replace(/""/g, '')
.replace(/length]\)}"/g, 'length])}');

25
lib/NToken.js
View File

@@ -19,7 +19,7 @@ class NToken {
if (el != null && typeof el != 'number') {
const is_reverse_base64 = el.includes('case 65:');
(({ // Identifies the transformation functions and emulates them accordingly.
[Constants.FUNCS.PUSH]: () => el = (arr, item) => this.push(arr, item),
[Constants.FUNCS.PUSH]: () => el = (arr, i) => this.push(arr, i),
[Constants.FUNCS.SPLICE]: () => el = (arr, i) => this.splice(arr, i),
[Constants.FUNCS.SWAP0_1]: () => el = (arr, i) => this.swap0(arr, i),
[Constants.FUNCS.SWAP0_2]: () => el = (arr, i) => this.swap0(arr, i),
@@ -27,7 +27,9 @@ class NToken {
[Constants.FUNCS.ROTATE_2]: () => el = (arr, i) => this.rotate(arr, i),
[Constants.FUNCS.REVERSE_1]: () => el = (arr) => this.reverse(arr),
[Constants.FUNCS.REVERSE_2]: () => el = (arr) => this.reverse(arr),
[Constants.FUNCS.TRANSLATE]: () => el = (arr, token) => this.translate(arr, token, is_reverse_base64)
[Constants.FUNCS.BASE64_DIA]: () => el = () => this.getBase64Dia(is_reverse_base64),
[Constants.FUNCS.TRANSLATE_1]: () => el = (arr, token) => this.translate1(arr, token, is_reverse_base64),
[Constants.FUNCS.TRANSLATE_2]: () => el = (arr, token, base64_dic) => this.translate2(arr, token, base64_dic)
})[this.getFunc(el)] || (() => el === 'b' && (el = n_token)))();
}
return el;
@@ -41,10 +43,11 @@ class NToken {
let transformation_calls = [...Utils.getStringBetweenStrings(this.raw_code.replace(/\n/g, ''), 'try{', '}catch').matchAll(this.transformation_calls_regex)].map((params) => ({ index: params[1], params: params[2] }));
transformation_calls.forEach((data) => {
const param_index = data.params.split(',').map((param) => param.match(/c\[(.*?)\]/)[1]);
transformations[data.index](transformations[param_index[0]], transformations[param_index[1]]);
const base64_dia = (param_index[2] && transformations[param_index[2]]());
transformations[data.index](transformations[param_index[0]], transformations[param_index[1]], base64_dia);
});
} catch (err) {
console.error(err);
console.error('Could not transform n-token, download may be throttled:', err);
return n;
}
@@ -60,13 +63,25 @@ class NToken {
return JSON.parse(Constants.formatNTransformData(data));
}
translate(arr, token, is_reverse_base64) {
translate1(arr, token, is_reverse_base64) {
const characters = is_reverse_base64 && Constants.BASE64_DIALECT.REVERSE || Constants.BASE64_DIALECT.NORMAL;
arr.forEach(function(char, index, loc) {
this.push(loc[index] = characters[(characters.indexOf(char) - characters.indexOf(this[index]) + 64) % characters.length]);
}, token.split(''));
}
translate2(arr, token, characters) {
let chars_length = characters.length;
arr.forEach(function(char, index, loc) {
this.push(loc[index] = characters[(characters.indexOf(char) - characters.indexOf(this[index]) + index + chars_length--) % characters.length]);
}, token.split(''));
}
getBase64Dia(is_reverse_base64) {
const characters = is_reverse_base64 && Constants.BASE64_DIALECT.REVERSE || Constants.BASE64_DIALECT.NORMAL;
return characters;
}
swap0(arr, index) {
const old_value = arr[0];
index = (index % arr.length + arr.length) % arr.length;