aes 加密类

<?php

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, $this->key, base64_decode($data), $this->mode, $this->iv);
		$data = rtrim(rtrim($data), "\x00..\x1F");
		return $data;
	}
	
}

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