php实现aes加密类分享

class AESMcrypt {public $iv = null;
public $key = null;
public $bit = 128;
private $cipher;public function __construct($bit,$key,$iv,$mode) {
if(empty($bit) || empty($key) || empty($iv) || empty($mode))
return NULL;$this->bit = $bit;
$this->key = $key;
$this->iv = $iv;
$this->mode = $mode;switch($this->bit) {
case 192:$this->cipher = MCRYPT_RIJNDAEL_192; break;
case 256:$this->cipher = MCRYPT_RIJNDAEL_256; break;
default: $this->cipher = MCRYPT_RIJNDAEL_128;
}switch($this->mode) {
case 'ecb':$this->mode = MCRYPT_MODE_ECB; break;
case 'cfb':$this->mode = MCRYPT_MODE_CFB; break;
case 'ofb':$this->mode = MCRYPT_MODE_OFB; break;
case 'nofb':$this->mode = MCRYPT_MODE_NOFB; break;
default: $this->mode = MCRYPT_MODE_CBC;
}
}public function encrypt($data) {
$data = base64_encode(mcrypt_encrypt( $this->cipher,$this->key,$data,$this->mode,$this->iv));
return $data;
}public function decrypt($data) {
$data = mcrypt_decrypt( $this->cipher,base64_decode($data),$this->iv);
$data = rtrim(rtrim($data),"x00..x1F");
return $data;
}}

//使用方法
$aes = new AESMcrypt($bit = 128,$key = 'abcdef1234567890',$iv = '0987654321fedcba',$mode = 'cbc');
$c = $aes->encrypt('haowei.me');
var_dump($aes->decrypt($c));