UCenter防止恶意访问（安全加固）

Web网络开发 20/3/29 1.7k 0

uc_server/admin.php是ucenter默认的后台地址，正常情况下可以直接访问，为了防止某些恶意访问的情况，可以修改以下内容进行安全性能提升。

适用版本：Discuz!x1-x3.4适用情况：ucenter在论坛根目录下

修改后效果：未登录Discuz论坛或不在指定的管理组，打开uc_server/admin.php提示404

具体实施方案：

打开uc_server/model/admin.php

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$this->cookie_status = isset($_COOKIE['sid']) ? 1 : 0;

下面接入代码：

if(!$this->cookie_status){
include UC_ROOT.'../config/config_global.php';
$cookiepre = $_config['cookie']['cookiepre'].substr(md5($_config['cookie']['cookiepath'].'|'.$_config['cookie']['cookiedomain']), 0, 4).'_';
$auth = addslashes($_COOKIE[$cookiepre.'auth']);
if(empty($_config['cookie']['saltkey'])) {
$_config['cookie']['saltkey'] = addslashes($_COOKIE[$cookiepre.'saltkey']);
}
$authkey = md5($_config['security']['authkey'].$_config['cookie']['saltkey']);
$auth = daddslashes(explode("\t", $this->dauthcode($auth, 'DECODE',$authkey)));
list($discuz_pw, $discuz_uid) = empty($auth) || count($auth) < 2 ? array('', '') : $auth;
$discuz_uid = intval($discuz_uid);
$groupid = $this->db->result_first("SELECT groupid FROM ".$_config['db'][1]['tablepre']."common_member WHERE uid='$discuz_uid'");
if(!in_array($groupid,array('1','2'))){
header("HTTP/1.1 404 Not Found");header("Status: 404 Not Found");exit;
}
}

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其中这里增加用户组：

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function __construct() {
$this->adminbase();
}

加入

function dauthcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {
$ckey_length = 4;
$key = md5($key );
$keya = md5(substr($key, 0, 16));
$keyb = md5(substr($key, 16, 16));
$keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';
$cryptkey = $keya.md5($keya.$keyc);
$key_length = strlen($cryptkey);
$string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;
$string_length = strlen($string);
$result = '';
$box = range(0, 255);
$rndkey = array();
for($i = 0; $i <= 255; $i++) {
$rndkey[$i] = ord($cryptkey[$i % $key_length]);
}
for($j = $i = 0; $i < 256; $i++) {
$j = ($j + $box[$i] + $rndkey[$i]) % 256;
$tmp = $box[$i];
$box[$i] = $box[$j];
$box[$j] = $tmp;
}
for($a = $j = $i = 0; $i < $string_length; $i++) {
$a = ($a + 1) % 256;
$j = ($j + $box[$a]) % 256;
$tmp = $box[$a];
$box[$a] = $box[$j];
$box[$j] = $tmp;
$result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
}
if($operation == 'DECODE') {
if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {
return substr($result, 26);
} else {
return '';
}
} else {
return $keyc.str_replace('=', '', base64_encode($result));
}
}

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