/**
* @param null|string $input
* @return string
*/
public function generateKey($input = NULL)
{
$text = $input === NULL ? $this->username . ';' . date('d/m/Y H:i:s') . ';' . $this->ip : $input;
$cipher = new \Crypt_Rijndael();
$cipher->setKeyLength(256);
$cipher->setBlockLength(128);
$cipher->setKey(base64_decode($this->key));
$cipher->setIV(base64_decode($this->iv));
return base64_encode($cipher->encrypt($text));
}
/**
* Decrypt the ciphertext
* @param string $cipherText
* @return object \stdClass Unserialized token
*/
public function decrypt($cipherText)
{
// Decryption: prefer mcrypt, if available (since it can decrypt data encrypted by either mcrypt or phpseclib)
$cipherText = base64_decode($cipherText);
$iv = substr($cipherText, 0, self::IV_SIZE);
$cipherText = substr($cipherText, self::IV_SIZE);
if (function_exists('mcrypt_decrypt')) {
$token = @mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $this->key, $cipherText, MCRYPT_MODE_CBC, $iv);
} else {
global $updraftplus;
$updraftplus->ensure_phpseclib('Crypt_Rijndael', 'Crypt/Rijndael');
$rijndael = new Crypt_Rijndael();
$rijndael->setKey($this->key);
$rijndael->setIV($iv);
$token = $rijndael->decrypt($cipherText);
}
return $token;
}
/**
* Sets the initialization vector. (optional)
*
* SetIV is not required when CRYPT_RIJNDAEL_MODE_ECB is being used. If not explictly set, it'll be assumed
* to be all zero's.
*
* @access public
* @param String $iv
*/
function setIV($iv)
{
parent::setIV($iv);
if (CRYPT_AES_MODE == CRYPT_AES_MODE_MCRYPT) {
$this->changed = true;
}
}
function osc_decrypt_alert($string) {
$key = hash("sha256", osc_get_alert_private_key(), true);
if(function_exists('mcrypt_module_open')) {
$cipher = mcrypt_module_open(MCRYPT_RIJNDAEL_256, '', MCRYPT_MODE_CBC, '');
$cipherText = '';
if (mcrypt_generic_init($cipher, $key, $key) != -1) {
$cipherText = mdecrypt_generic($cipher, $string);
mcrypt_generic_deinit($cipher);
}
return trim(substr($cipherText, 32));
};
require_once LIB_PATH . 'phpseclib/Crypt/Rijndael.php';
$cipher = new Crypt_Rijndael(CRYPT_RIJNDAEL_MODE_CBC);
$cipher->disablePadding();
$cipher->setBlockLength(256);
$cipher->setKey($key);
$cipher->setIV($key);
return trim(substr($cipher->decrypt($string), 32));
}