# AES加解密类源码
> 根据网络整理
~~~
/**
* Created by PhpStorm.
* Power by Mikkle
* QQ:776329498
* Date: /7/3
* Time: 20:48
*/
namespace app\base\controller;
class AES
{
/**
* AES加密、解密类
* 用法：
*
* // 实例化类
* // 参数$_bit：格式，支持256、192、128，默认为128字节的
* // 参数$_type：加密/解密方式，支持cfb、cbc、nofb、ofb、stream、ecb，默认为ecb
* // 参数$_key：密钥，默认为 _Mikkle_AES_Key_
* $tcaes = new TCAES();
* $string = 'laohu';
* // 加密
* $encodeString = $tcaes->encode($string);
* // 解密
* $decodeString = $tcaes->decode($encodeString);
*
*/
private $_bit = MCRYPT_RIJNDAEL_256;
private $_type = MCRYPT_MODE_CBC;
private $_key = '_Mikkle_AES_Key_'; // 密钥 必须16位 24位
private $_use_base64 = true;
private $_iv_size = null;
private $_iv = null;
/**
* @param string $_key 密钥
* @param int $_bit 默认使用128字节
* @param string $_type 加密解密方式
* @param boolean $_use_base64 默认使用base64二次加密
*/
public function __construct($_key = '', $_bit = 128, $_type = 'ecb', $_use_base64 = true){
// 加密字节
if(192 === $_bit){
$this->_bit = MCRYPT_RIJNDAEL_192;
}elseif(128 === $_bit){
$this->_bit = MCRYPT_RIJNDAEL_128;
}else{
$this->_bit = MCRYPT_RIJNDAEL_256;
}
// 加密方法
if('cfb' === $_type){
$this->_type = MCRYPT_MODE_CFB;
}elseif('cbc' === $_type){
$this->_type = MCRYPT_MODE_CBC;
}elseif('nofb' === $_type){
$this->_type = MCRYPT_MODE_NOFB;
}elseif('ofb' === $_type){
$this->_type = MCRYPT_MODE_OFB;
}elseif('stream' === $_type){
$this->_type = MCRYPT_MODE_STREAM;
}else{
$this->_type = MCRYPT_MODE_ECB;
}
// 密钥
if(!empty($_key)){
$this->_key = $_key;
}
// 是否使用base64
$this->_use_base64 = $_use_base64;
$this->_iv_size = mcrypt_get_iv_size($this->_bit, $this->_type);
$this->_iv = mcrypt_create_iv($this->_iv_size, MCRYPT_RAND);
}
/**
* 加密
* @param string $string 待加密字符串
* @return string
*/
public function encode($string){
//
if(MCRYPT_MODE_ECB === $this->_type){
$encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type);
}else{
$encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv);
}
if($this->_use_base64){
$encodeString = base64_encode($encodeString);
}
return $encodeString;
}
/**
* 解密
* @param string $string 待解密字符串
* @return string
*/
public function decode($string){
if($this->_use_base64){
$string = base64_decode($string);
}
if(MCRYPT_MODE_ECB === $this->_type){
$decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type);
}else{
$decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv);
}
return $decodeString;
}
}
~~~
