Proyectos de Subversion Moodle

<?php

declare(strict_types=1);

namespace OpenSpout\Writer\XLSX\Helper;

/**

 * @internal

 */

final class PasswordHashHelper

{

    public static function make(string $password): string

    {

        $verifier = 0;

        $pwlen = \strlen($password);

        $passwordArray = pack('c', $pwlen).$password;

        for ($i = $pwlen; $i >= 0; --$i) {

            $intermediate1 = (($verifier & 0x4000) === 0) ? 0 : 1;

            $intermediate2 = 2 * $verifier;

            $intermediate2 &= 0x7FFF;

            $intermediate3 = $intermediate1 | $intermediate2;

            $verifier = $intermediate3 ^ \ord($passwordArray[$i]);

        }

        $verifier ^= 0xCE4B;

        return strtoupper(dechex($verifier));

    }

}