分享一個標準PHP的AES加密算法類，其中mcrypt_get_block_size('rijndael-128', 'ecb');，如果在不明白原理的情況下比較容易搞錯，可以通過mcrypt_list_algorithms函數查看你需要的加密算法標識。
復制代碼代碼如下:
<?php
/**
* AES128加解密類
* @author dy
*
*/
defined('InEjbuy') or exit('Access Invalid!');
class Aes{
//密鑰
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模式加密數據
$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模式加密數據
$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;
}
}
以上就是本文所述的全部內容了，希望對大家學習php的AES加密算法類有所幫助。
