Created
March 21, 2019 15:14
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const crypto = require('crypto') //модуль для криптографии Nodejs | |
const { stringify } = require('querystring') //методы для парсинга строки | |
const url = require('url') | |
const URL = | |
'https://example.com/?vk_user_id=494075&vk_app_id=6736218&vk_is_app_user=1&vk_are_notifications_enabled=1&vk_language=ru&vk_access_token_settings=&vk_platform=android&sign=exTIBPYTrAKDTHLLm2AwJkmcVcvFCzQUNyoa6wAjvW6k', | |
CLIENT_SECRET = 'wvl68m4dR1UpLrVRli' | |
const checkVKQueryParamsSign = params => { | |
const query = url.parse(params, true).query | |
const list_of_params = Object.entries(query) //перевод в обьекта параметро в список | |
.filter(e => e[0].startsWith('vk_')) //фильтрация параметров VK | |
.sort((a, b) => { | |
if (a[0] < b[0]) { | |
return -1 | |
} | |
if (a[0] > b[0]) { | |
return 1 | |
} | |
return 0 | |
}) //сортировка по алфавиту | |
const params_str = stringify( | |
list_of_params.reduce((obj, [k, v]) => ({ ...obj, [k]: v }), {}) | |
) //перевод параметров в строковый вид | |
const hmac = crypto.createHmac('sha256', CLIENT_SECRET) //инициализация генератора подписи | |
hmac.update(params_str) //добавление строки с параметрами | |
const sign = hmac | |
.digest('base64') | |
.replace(/\+/g, '-') | |
.replace(/\//g, '_') | |
.replace(/=/g, '') //генерация подписи | |
return sign === query.sign //сравнение подписей | |
} | |
console.log(checkVKQueryParamsSign(URL)) |
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