maganuk

import { padStart } from 'lodash';
import leb128 from 'leb128';
import crypto from 'crypto';

// magic header used to identify an identity cookie
const MAGIC_HEADER = 0x09F0C9F0;
// key id size in bytes
const SIZE_KEY_ID = 16;
// size of key modifier according to the CbcAuthenticatedEncryptor:
// https://github.com/aspnet/DataProtection/blob/dev/src/Microsoft.AspNetCore.DataProtection/Cng/CbcAuthenticatedEncryptor.cs