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<?php
/**
* @package Duplicator
* @copyright (c) 2021, Snapcreek LLC
*/
namespace Duplicator\Utils\Crypt;
//DUP_PRO_Crypt
class CryptCustom implements CryptInterface
{
/**
* Return encrypt string
*
* @param string $string string to encrypt
* @param string $key hash key
*
* @return string
*/
public static function encrypt($string, $key)
{
$result = '';
for ($i = 0; $i < strlen($string); $i++) {
$char = substr($string, $i, 1);
$keychar = substr($key, ($i % strlen($key)) - 1, 1);
$char = chr(ord($char) + ord($keychar));
$result .= $char;
}
return urlencode(base64_encode($result));
}
/**
* Return decrypt string
*
* @param string $string string to decrypt
* @param string $key hash key
*
* @return string
*/
public static function decrypt($string, $key)
{
$result = '';
$string = urldecode($string);
$string = base64_decode($string);
for ($i = 0; $i < strlen($string); $i++) {
$char = substr($string, $i, 1);
$keychar = substr($key, ($i % strlen($key)) - 1, 1);
$char = chr(ord($char) - ord($keychar));
$result .= $char;
}
return $result;
}
/**
* Encrypt function by def key
*
* @param string $string stringto encrypt
*
* @return string
*/
public static function scramble($string)
{
return self::encrypt($string, self::sk1() . self::sk2());
}
/**
* Decrypt function by def key
*
* @param string $string encrypted string
*
* @return string
*/
public static function unscramble($string)
{
return self::decrypt($string, self::sk1() . self::sk2());
}
/**
* Get sk key 1
*
* @return string
*/
public static function sk1()
{
return 'fdas' . self::encrypt('v1', 'abx');
}
/**
* Get sk key 2
*
* @return string
*/
public static function sk2()
{
return 'fres' . self::encrypt('v2', 'ad3x');
}
}
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