Home > php教程 > php手册 > body text

标准PHP的AES加密算法类

WBOY
Release: 2016-06-06 20:06:58
Original
1493 people have browsed it

AES是分组密钥,算法输入128位数据,密钥长度也是128位。用Nr表示对一个数据分组加密的轮数(加密轮数与密钥长度的关系如表1所列)。每一轮都需要一个与输入分组

分享一个标准PHP的AES加密算法类,其中mcrypt_get_block_size('rijndael-128', 'ecb');,如果在不明白原理的情况下比较容易搞错,,可以通过mcrypt_list_algorithms函数查看你需要的加密算法标识。

复制代码 代码如下:


/**
 * 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             $char = chr($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内容了,希望对大家学习php的AES加密算法类有所帮助。

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Recommendations
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!