作者:_郭士铭 | 来源:互联网 | 2018-03-20 22:07
php代码
class aes {
static public $mode = MCRYPT_MODE_NOFB;
static public function generateKey($length=32) {
if (!in_array($length,array(16,24,32)))
return False;
$str = '';
for ($i=0;$i<$length;$i++) {
$str .= chr(rand(33,126));
}
return $str;
}
static public function encrypt($data, $key) {
if (strlen($key) > 32 || !$key)
return trigger_error(&#39;key too large or key is empty.&#39;, E_USER_WARNING) && False;
$ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, self::$mode);
$iv = mcrypt_create_iv($ivSize, (substr(PHP_OS,0,1) == &#39;W&#39; ? MCRYPT_RAND : MCRYPT_DEV_URANDOM ));
$encryptedData = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $data, self::$mode, $iv);
$encryptedData = $iv . $encryptedData;
return base64_encode($encryptedData);
}
static public function decrypt($data, $key) {
if (strlen($key) > 32 || !$key)
return trigger_error(&#39;key too large or key is empty.&#39;, E_USER_WARNING) && False;
$data = base64_decode($data);
if (!$data)
return False;
$ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, self::$mode);
$iv = substr($data, 0, $ivSize);
$data = substr($data, $ivSize);
$decryptData = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $data, self::$mode, $iv);
return $decryptData;
}
}