/**
* @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));
}
/**
* Initilizes cryptographic scheme
*/
private static function init()
{
if (is_null(self::$cryptographicScheme)) {
$key = KeyHandler::readKey();
$mysqlKey = "";
for ($a = 0; $a < strlen($key); $a++) {
$mysqlKey[$a % 16] = chr(ord($mysqlKey[$a % 16]) ^ ord($key[$a]));
}
$aes = new Crypt_Rijndael(CRYPT_RIJNDAEL_MODE_ECB);
$aes->setKeyLength(128);
$aes->setBlockLength(128);
$aes->setKey($mysqlKey);
self::$cryptographicScheme = $aes;
}
}
function osc_decrypt_alert($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));
}
/**
*
* Encrypts given value, with given key, and hex encodes it before
* returning.
*
* Compatible with mysql: "hex(aes_encrypt($val, $key))
*
* @param string $val - value to encrypt
* @param string $ky - key
* @return string encrypted value
*/
public function encrypt($val, $key)
{
if (empty($val)) {
return $val;
}
$mysqlKey = "";
for ($a = 0; $a < strlen($key); $a++) {
$mysqlKey[$a % 16] = chr(ord($mysqlKey[$a % 16]) ^ ord($key[$a]));
}
$aes = new Crypt_Rijndael(CRYPT_RIJNDAEL_MODE_ECB);
$aes->setKeyLength(128);
$aes->setBlockLength(128);
$aes->setKey($mysqlKey);
$encrypt = $aes->encrypt($val);
$encrypt = strtoupper(bin2hex($encrypt));
return $encrypt;
}
