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  • php加密解密处理类

    [PHP]代码

    <?php
    /*===========================================================
    = 版权协议:
    = GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991)
    =------------------------------------------------------------
    = 文件名称:cls.sys_crypt.php
    = 摘    要:php加密解密处理类
    = 版    本:1.0
    = 参    考:Discuz论坛的passport相关函数
    =------------------------------------------------------------
    = Script Written By PHPWMS项目组
    = 最后更新:xinge
    = 最后日期:2007-12-09
    ============================================================*/
    
    class SysCrypt {
    
    private $crypt_key;
    
    // 构造函数
    public function __construct($crypt_key) {
       $this -> crypt_key = $crypt_key;
    }
    
    public function php_encrypt($txt) {
       srand((double)microtime() * 1000000);
       $encrypt_key = md5(rand(0,32000));
       $ctr = 0;
       $tmp = '';
       for($i = 0;$i<strlen($txt);$i++) {
        $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
        $tmp .= $encrypt_key[$ctr].($txt[$i]^$encrypt_key[$ctr++]);
       }
       return base64_encode(self::__key($tmp,$this -> crypt_key));
    }
    
    public function php_decrypt($txt) {
       $txt = self::__key(base64_decode($txt),$this -> crypt_key);
       $tmp = '';
       for($i = 0;$i < strlen($txt); $i++) {
        $md5 = $txt[$i];
        $tmp .= $txt[++$i] ^ $md5;
       }
       return $tmp;
    }
    
    private function __key($txt,$encrypt_key) {
       $encrypt_key = md5($encrypt_key);
       $ctr = 0;
       $tmp = '';
       for($i = 0; $i < strlen($txt); $i++) {
        $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
        $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];
       }
       return $tmp;
    }
    
    public function __destruct() {
       $this -> crypt_key = null;
    }
    }
    
    $sc = new SysCrypt('phpwms');
    $text = '110';
    print($sc -> php_encrypt($text));
    print('<br>');
    print($sc -> php_decrypt($sc -> php_encrypt($text)));
    ?>
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  • 原文地址:https://www.cnblogs.com/ghjbk/p/7519822.html
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