AbstractSalt.php

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<?php
namespace TYPO3\CMS\Saltedpasswords\Salt;

/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */

abstract class AbstractSalt
{
    abstract protected function applySettingsToSalt($salt);

    abstract protected function getGeneratedSalt();

    abstract protected function getItoa64();

    abstract protected function getSetting();

    public function base64Encode($input, $count)
    {
        $output = '';
        $i = 0;
        $itoa64 = $this->getItoa64();
        do {
            $value = ord($input[$i++]);
            $output .= $itoa64[$value & 63];
            if ($i < $count) {
                $value |= ord($input[$i]) << 8;
            }
            $output .= $itoa64[$value >> 6 & 63];
            if ($i++ >= $count) {
                break;
            }
            if ($i < $count) {
                $value |= ord($input[$i]) << 16;
            }
            $output .= $itoa64[$value >> 12 & 63];
            if ($i++ >= $count) {
                break;
            }
            $output .= $itoa64[$value >> 18 & 63];
        } while ($i < $count);
        return $output;
    }

    protected function getLengthBase64FromBytes($byteLength)
    {
        // Calculates bytes in bits in base64
        return (int)ceil($byteLength * 8 / 6);
    }
}