www.gusucode.com > 高端企业门户+论坛网站源码程序 > 整站安装/整站源码/source/include/misc/misc_security.php
<?php /** * [Discuz!] (C)2001-2099 Comsenz Inc. * This is NOT a freeware, use is subject to license terms * * $Id: misc_security.php 25889 2011-11-24 09:52:20Z monkey $ */ if(!defined('IN_DISCUZ')) { exit('Access Denied'); } global $_G; if(is_string($this->config['security']['attackevasive'])) { $attackevasive_tmp = explode('|', $this->config['security']['attackevasive']); $attackevasive = 0; foreach($attackevasive_tmp AS $key => $value) { $attackevasive += intval($value); } unset($attackevasive_tmp); } else { $attackevasive = $this->config['security']['attackevasive']; } $lastrequest = isset($_G['cookie']['lastrequest']) ? authcode($_G['cookie']['lastrequest'], 'DECODE') : ''; if($attackevasive & 1 || $attackevasive & 4) { dsetcookie('lastrequest', authcode(TIMESTAMP, 'ENCODE'), TIMESTAMP + 816400, 1, true); } if($attackevasive & 1) { if(TIMESTAMP - $lastrequest < 1) { securitymessage('attackevasive_1_subject', 'attackevasive_1_message'); } } if(($attackevasive & 2) && ($_SERVER['HTTP_X_FORWARDED_FOR'] || $_SERVER['HTTP_VIA'] || $_SERVER['HTTP_PROXY_CONNECTION'] || $_SERVER['HTTP_USER_AGENT_VIA'] || $_SERVER['HTTP_CACHE_INFO'] || $_SERVER['HTTP_PROXY_CONNECTION'])) { securitymessage('attackevasive_2_subject', 'attackevasive_2_message', FALSE); } if($attackevasive & 4) { if(empty($lastrequest) || TIMESTAMP - $lastrequest > 300) { securitymessage('attackevasive_4_subject', 'attackevasive_4_message'); } } if($attackevasive & 8) { list($visitcode, $visitcheck, $visittime) = explode('|', authcode($_G['cookie']['visitcode'], 'DECODE')); if(!$visitcode || !$visitcheck || !$visittime || TIMESTAMP - $visittime > 60 * 60 * 4 ) { if(empty($_POST['secqsubmit']) || ($visitcode != md5($_POST['answer']))) { $answer = 0; $question = ''; for ($i = 0; $i< rand(2, 5); $i ++) { $r = rand(1, 20); $question .= $question ? ' + '.$r : $r; $answer += $r; } $question .= ' = ?'; dsetcookie('visitcode', authcode(md5($answer).'|0|'.TIMESTAMP, 'ENCODE'), TIMESTAMP + 816400, 1, true); securitymessage($question, '<input type="text" name="answer" size="8" maxlength="150" /><input type="submit" name="secqsubmit" class="button" value=" Submit " />', FALSE, TRUE); } else { dsetcookie('visitcode', authcode($visitcode.'|1|'.TIMESTAMP, 'ENCODE'), TIMESTAMP + 816400, 1, true); } } } function securitymessage($subject, $message, $reload = TRUE, $form = FALSE) { global $_G; $scuritylang = array( 'attackevasive_1_subject' => '频繁刷新限制', 'attackevasive_1_message' => '您访问本站速度过快或者刷新间隔时间小于两秒!请等待页面自动跳转 ...', 'attackevasive_2_subject' => '代理服务器访问限制', 'attackevasive_2_message' => '本站现在限制使用代理服务器访问,请去除您的代理设置,直接访问本站。', 'attackevasive_4_subject' => '页面重载开启', 'attackevasive_4_message' => '欢迎光临本站,页面正在重新载入,请稍候 ...' ); $subject = $scuritylang[$subject] ? $scuritylang[$subject] : $subject; $message = $scuritylang[$message] ? $scuritylang[$message] : $message; if($_GET['inajax']) { security_ajaxshowheader(); echo '<div id="attackevasive_1" class="popupmenu_option"><b style="font-size: 16px">'.$subject.'</b><br /><br />'.$message.'</div>'; security_ajaxshowfooter(); } else { echo '<html>'; echo '<head>'; echo '<title>'.$subject.'</title>'; echo '</head>'; echo '<body bgcolor="#FFFFFF">'; if($reload) { echo '<script language="JavaScript">'; echo 'function reload() {'; echo ' document.location.reload();'; echo '}'; echo 'setTimeout("reload()", 1001);'; echo '</script>'; } if($form) { echo '<form action="'.$G['PHP_SELF'].'" method="post" autocomplete="off">'; } echo '<table cellpadding="0" cellspacing="0" border="0" width="700" align="center" height="85%">'; echo ' <tr align="center" valign="middle">'; echo ' <td>'; echo ' <table cellpadding="10" cellspacing="0" border="0" width="80%" align="center" style="font-family: Verdana, Tahoma; color: #666666; font-size: 11px">'; echo ' <tr>'; echo ' <td valign="middle" align="center" bgcolor="#EBEBEB">'; echo ' <br /><br /> <b style="font-size: 16px">'.$subject.'</b> <br /><br />'; echo $message; echo ' <br /><br />'; echo ' </td>'; echo ' </tr>'; echo ' </table>'; echo ' </td>'; echo ' </tr>'; echo '</table>'; if($form) { echo '</form>'; } echo '</body>'; echo '</html>'; } exit(); } function security_ajaxshowheader() { $charset = getglobal('config/output/charset'); ob_end_clean(); @header("Expires: -1"); @header("Cache-Control: no-store, private, post-check=0, pre-check=0, max-age=0", FALSE); @header("Pragma: no-cache"); header("Content-type: application/xml"); echo "<?xml version=\"1.0\" encoding=\"".$charset."\"?>\n<root><![CDATA["; } function security_ajaxshowfooter() { echo ']]></root>'; exit(); } ?>