<?php
/*** AES128加解密类* @author dy**/
defined('InEjbuy') or exit('Access Invalid!');
class Aes{//密钥private $_secrect_key;public function __construct(){$this->_secrect_key = 'MYgGnQE2jDFADSFFDSEWsdD';}/*** 加密方法* @param string $str* @return string*/public function encrypt($str){//AES, 128 ECB模式加密数据$screct_key = $this->_secrect_key;$screct_key = base64_decode($screct_key);$str = trim($str);$str = $this->addPKCS7Padding($str);$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_RAND);$encrypt_str =  mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $screct_key, $str, MCRYPT_MODE_ECB, $iv);return base64_encode($encrypt_str);}/*** 解密方法* @param string $str* @return string*/public function decrypt($str){//AES, 128 ECB模式加密数据$screct_key = $this->_secrect_key;$str = base64_decode($str);$screct_key = base64_decode($screct_key);$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_RAND);$encrypt_str =  mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $screct_key, $str, MCRYPT_MODE_ECB, $iv);$encrypt_str = trim($encrypt_str);$encrypt_str = $this->stripPKSC7Padding($encrypt_str);return $encrypt_str;}/*** 填充算法* @param string $source* @return string*/function addPKCS7Padding($source){$source = trim($source);$block = mcrypt_get_block_size('rijndael-128', 'ecb');$pad = $block - (strlen($source) % $block);if ($pad <= $block) {$char = chr($pad);$source .= str_repeat($char, $pad);}return $source;}/*** 移去填充算法* @param string $source* @return string*/function stripPKSC7Padding($source){$source = trim($source);$char = substr($source, -1);$num = ord($char);if($num==62)return $source;$source = substr($source,0,-$num);return $source;}
}