You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.3 KiB
PHP
83 lines
2.3 KiB
PHP
<?php
|
|
// +----------------------------------------------------------------------
|
|
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
|
|
// +----------------------------------------------------------------------
|
|
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
|
|
// +----------------------------------------------------------------------
|
|
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
|
|
// +----------------------------------------------------------------------
|
|
// | Author: liu21st <liu21st@gmail.com>
|
|
// +----------------------------------------------------------------------
|
|
namespace Think\Crypt\Driver;
|
|
/**
|
|
* Crypt 加密实现类
|
|
* @category ORG
|
|
* @package ORG
|
|
* @subpackage Crypt
|
|
* @author liu21st <liu21st@gmail.com>
|
|
*/
|
|
class Crypt {
|
|
|
|
/**
|
|
* 加密字符串
|
|
* @param string $str 字符串
|
|
* @param string $key 加密key
|
|
* @param integer $expire 有效期（秒）
|
|
* @return string
|
|
*/
|
|
public static function encrypt($str,$key,$expire=0){
|
|
$expire = sprintf('%010d', $expire ? $expire + time():0);
|
|
$r = md5($key);
|
|
$c = 0;
|
|
$v = "";
|
|
$str = $expire.$str;
|
|
$len = strlen($str);
|
|
$l = strlen($r);
|
|
for ($i=0;$i<$len;$i++){
|
|
if ($c== $l) $c=0;
|
|
$v .= substr($r,$c,1) .
|
|
(substr($str,$i,1) ^ substr($r,$c,1));
|
|
$c++;
|
|
}
|
|
return self::ed($v,$key);
|
|
}
|
|
|
|
/**
|
|
* 解密字符串
|
|
* @param string $str 字符串
|
|
* @param string $key 加密key
|
|
* @return string
|
|
*/
|
|
public static function decrypt($str,$key) {
|
|
$str = self::ed($str,$key);
|
|
$v = "";
|
|
$len = strlen($str);
|
|
for ($i=0;$i<$len;$i++){
|
|
$md5 = substr($str,$i,1);
|
|
$i++;
|
|
$v .= (substr($str,$i,1) ^ $md5);
|
|
}
|
|
$data = $v;
|
|
$expire = substr($data,0,10);
|
|
if($expire > 0 && $expire < time()) {
|
|
return '';
|
|
}
|
|
$data = substr($data,10);
|
|
return $data;
|
|
}
|
|
|
|
|
|
static private function ed($str,$key) {
|
|
$r = md5($key);
|
|
$c = 0;
|
|
$v = '';
|
|
$len = strlen($str);
|
|
$l = strlen($r);
|
|
for ($i=0;$i<$len;$i++) {
|
|
if ($c==$l) $c=0;
|
|
$v .= substr($str,$i,1) ^ substr($r,$c,1);
|
|
$c++;
|
|
}
|
|
return $v;
|
|
}
|
|
} |