RsaEncryptionDecoder.php

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<?php
namespace ‪TYPO3\CMS\Rsaauth;
 
/*
 * 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!
 */
 
class ‪RsaEncryptionDecoder implements ‪\TYPO3\CMS\Core\SingletonInterface
{
    protected ‪$backend;
 
    protected ‪$storage;
 
    protected ‪$key;
 
    public function ‪decrypt($data)
    {
        if ($this->‪getKey() === '' || !$this->‪isAvailable()) {
            return $data;
        }
 
        $decryptedData = is_array($data) ? $data : [$data];
        $decryptedData = $this->‪decryptDataArray($decryptedData);
        $this->‪getStorage()->put(null);
 
        return is_array($data) ? $decryptedData : $decryptedData[0];
    }
 
    public function ‪isAvailable()
    {
        return $this->‪getBackend() instanceof ‪Backend\AbstractBackend;
    }
 
    protected function ‪decryptDataArray(array $data)
    {
        foreach ($data as ‪$key => $value) {
            if (empty($value)) {
                continue;
            }
            if (is_array($value)) {
                $data[‪$key] = $this->‪decryptDataArray($value);
                continue;
            }
 
            if (strpos($value, 'rsa:') !== 0) {
                continue;
            }
 
            $decryptedValue = $this->‪getBackend()->decrypt($this->‪getKey(), substr($value, 4));
            if ($decryptedValue !== null) {
                $data[‪$key] = $decryptedValue;
            }
        }
 
        return $data;
    }
 
    protected function ‪getKey()
    {
        if ($this->key === null) {
            $this->key = $this->‪getStorage()->get();
 
            if ($this->key === null) {
                $this->key = '';
            }
        }
 
        return ‪$this->key;
    }
 
    protected function ‪getBackend()
    {
        if ($this->backend === null) {
            $this->backend = ‪Backend\BackendFactory::getBackend();
        }
 
        return ‪$this->backend;
    }
 
    protected function ‪getStorage()
    {
        if ($this->storage === null) {
            $this->storage = ‪Storage\StorageFactory::getStorage();
        }
 
        return ‪$this->storage;
    }
}