<?php
/*
Copyright 2016 Daniil Gentili
(https://daniil.it)
This file is part of MadelineProto.
MadelineProto is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
MadelineProto is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
You should have received a copy of the GNU General Public License along with MadelineProto.
If not, see <http://www.gnu.org/licenses/>.
*/

require 'vendor/autoload.php';

$id = "AgADBAADcKoxG4_aCgYKET2oLMua7pxRaRkABKoeLWY9bpazGdcCAAEC";

function foreach_offset_length($string, $callback) {
    $strlen = strlen($string);
    for ($offset = 0; $offset < strlen($string); $offset++) {
        for ($length = $strlen - $offset; $length > 0; $length--) {
            $s = substr($string, $offset, $length);
            echo 'Offset: '.$offset.', length: '.$length.', res: ';
            $callback($s);
        }
    }
}

$base256 = base64url_decode($id);
foreach_offset_length($base256, function ($s) {
    $int = (string)(new \phpseclib\Math\BigInteger(strrev($s), 256));
    echo $int.PHP_EOL;
});

function base64url_decode($data) {
  return base64_decode(str_pad(strtr($data, '-_', '+/'), strlen($data) % 4, '=', STR_PAD_RIGHT));
}