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.
86 lines
2.7 KiB
PHTML
86 lines
2.7 KiB
PHTML
5 years ago
|
<?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;
|
||
|
|
/**
|
||
|
|
* Base64 加密实现类
|
||
|
|
*/
|
||
|
|
class Think {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 加密字符串
|
||
|
|
* @param string $str 字符串
|
||
|
|
* @param string $key 加密key
|
||
|
|
* @param integer $expire 有效期（秒）
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public static function encrypt($data,$key,$expire=0) {
|
||
|
|
$expire = sprintf('%010d', $expire ? $expire + time():0);
|
||
|
|
$key = md5($key);
|
||
|
|
$data = base64_encode($expire.$data);
|
||
|
|
$x = 0;
|
||
|
|
$len = strlen($data);
|
||
|
|
$l = strlen($key);
|
||
|
|
$char = $str = '';
|
||
|
|
|
||
|
|
for ($i = 0; $i < $len; $i++) {
|
||
|
|
if ($x == $l) $x = 0;
|
||
|
|
$char .= substr($key, $x, 1);
|
||
|
|
$x++;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ($i = 0; $i < $len; $i++) {
|
||
|
|
$str .= chr(ord(substr($data, $i, 1)) + (ord(substr($char, $i, 1)))%256);
|
||
|
|
}
|
||
|
|
return str_replace(array('+','/','='),array('-','_',''),base64_encode($str));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 解密字符串
|
||
|
|
* @param string $str 字符串
|
||
|
|
* @param string $key 加密key
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public static function decrypt($data,$key) {
|
||
|
|
$key = md5($key);
|
||
|
|
$data = str_replace(array('-','_'),array('+','/'),$data);
|
||
|
|
$mod4 = strlen($data) % 4;
|
||
|
|
if ($mod4) {
|
||
|
|
$data .= substr('====', $mod4);
|
||
|
|
}
|
||
|
|
$data = base64_decode($data);
|
||
|
|
|
||
|
|
$x = 0;
|
||
|
|
$len = strlen($data);
|
||
|
|
$l = strlen($key);
|
||
|
|
$char = $str = '';
|
||
|
|
|
||
|
|
for ($i = 0; $i < $len; $i++) {
|
||
|
|
if ($x == $l) $x = 0;
|
||
|
|
$char .= substr($key, $x, 1);
|
||
|
|
$x++;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ($i = 0; $i < $len; $i++) {
|
||
|
|
if (ord(substr($data, $i, 1))<ord(substr($char, $i, 1))) {
|
||
|
|
$str .= chr((ord(substr($data, $i, 1)) + 256) - ord(substr($char, $i, 1)));
|
||
|
|
}else{
|
||
|
|
$str .= chr(ord(substr($data, $i, 1)) - ord(substr($char, $i, 1)));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$data = base64_decode($str);
|
||
|
|
$expire = substr($data,0,10);
|
||
|
|
if($expire > 0 && $expire < time()) {
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
$data = substr($data,10);
|
||
|
|
return $data;
|
||
|
|
}
|
||
|
|
}
|