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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
declare(strict_types=1);
namespace Magento\Framework\Encryption;
/**
* Class encapsulates cryptographic algorithm
*
* @api
* @deprecated 102.0.0
* @since 100.0.2
*/
class Crypt
{
/**
* @var string
*/
protected $_cipher;
/**
* @var string
*/
protected $_mode;
/**
* @var string
*/
protected $_initVector;
/**
* Mcrypt adapter
*
* @var \Magento\Framework\Encryption\Adapter\Mcrypt
*/
private $mcrypt;
/**
* Constructor
*
* @param string $key Secret encryption key.
* It's unsafe to store encryption key in memory, so no getter for key exists.
* @param string $cipher Cipher algorithm (one of the MCRYPT_ciphername constants)
* @param string $mode Mode of cipher algorithm (MCRYPT_MODE_modeabbr constants)
* @param string|bool $initVector Initial vector to fill algorithm blocks.
* TRUE generates a random initial vector.
* FALSE fills initial vector with zero bytes to not use it.
* @throws \Exception
*/
public function __construct(
$key,
$cipher = MCRYPT_BLOWFISH,
$mode = MCRYPT_MODE_ECB,
$initVector = false
) {
if (true === $initVector) {
// @codingStandardsIgnoreStart
$handle = @mcrypt_module_open($cipher, '', $mode, '');
$initVectorSize = @mcrypt_enc_get_iv_size($handle);
// @codingStandardsIgnoreEnd
/* Generate a random vector from human-readable characters */
$allowedCharacters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$initVector = '';
for ($i = 0; $i < $initVectorSize; $i++) {
$initVector .= $allowedCharacters[rand(0, strlen($allowedCharacters) - 1)];
}
// @codingStandardsIgnoreStart
@mcrypt_generic_deinit($handle);
@mcrypt_module_close($handle);
// @codingStandardsIgnoreEnd
}
$this->mcrypt = new \Magento\Framework\Encryption\Adapter\Mcrypt(
$key,
$cipher,
$mode,
$initVector === false ? null : $initVector
);
}
/**
* Retrieve a name of currently used cryptographic algorithm
*
* @return string
*/
public function getCipher()
{
return $this->mcrypt->getCipher();
}
/**
* Mode in which cryptographic algorithm is running
*
* @return string
*/
public function getMode()
{
return $this->mcrypt->getMode();
}
/**
* Retrieve an actual value of initial vector that has been used to initialize a cipher
*
* @return string
*/
public function getInitVector()
{
return $this->mcrypt->getInitVector();
}
/**
* Encrypt a data
*
* @param string $data String to encrypt
* @return string
*/
public function encrypt($data)
{
if (strlen($data) == 0) {
return $data;
}
// @codingStandardsIgnoreLine
return @mcrypt_generic($this->mcrypt->getHandle(), $data);
}
/**
* Decrypt a data
*
* @param string $data String to decrypt
* @return string
*/
public function decrypt($data)
{
return $this->mcrypt->decrypt($data);
}
}