php实现aes加密类

php实现的aes加密类，代码中有使用方法。

<?php

//php aes加密类

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;

} // www.jbxue.com



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;

}



}

//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));