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| <?php
/*
# -*- coding: utf-8 -*-
# @Author: h1xa
# @Date: 2021-07-26 10:25:59
# @Last Modified by: h1xa
# @Last Modified time: 2021-08-01 01:52:58
# @email: h1xa@ctfer.com
# @link: https://ctfer.com
*/
error_reporting(0);
session_start();
include 'init.php';
$a=$_GET['action'];
$data = file_get_contents(DB_PATH);
$ret = '';
switch ($a) {
case 'list':
$ret = getUsers($data,intval($_GET['page']),intval($_GET['limit']));
break;
case 'add':
$ret = addUser($data,$_GET['username'],$_GET['password']);
break;
case 'del':
$ret = delUser($data,$_GET['username']);
break;
case 'update':
$ret = updateUser($data,$_GET['username'],$_GET['password']);
break;
case 'backup':
backupUsers();
break;
case 'upload':
$ret = recoveryUsers();
break;
case 'phpInfo':
$ret = phpInfoTest();
break;
case 'netTest':
$ret = netTest($_GET['cmd']);
break;
case 'remoteUpdate':
$ret = remoteUpdate($_GET['auth'],$_GET['update_address']);
break;
case 'authKeyValidate':
$ret = authKeyValidate($_GET['auth']);
break;
case 'evilString':
evilString($_GET['m']);
break;
case 'evilNumber':
evilNumber($_GET['m'],$_GET['key']);
break;
case 'evilFunction':
evilFunction($_GET['m'],$_GET['key']);
break;
case 'evilArray':
evilArray($_GET['m'],$_GET['key']);
break;
case 'evilClass':
evilClass($_GET['m'],$_GET['key']);
break;
default:
$ret = json_encode(array(
'code'=>0,
'message'=>'数据获取失败',
));
break;
}
echo $ret;
function getUsers($data,$page=1,$limit=10){
$ret = array(
'code'=>0,
'message'=>'数据获取成功',
'data'=>array()
);
$isadmin = '否';
$pass = '';
$content='无';
$users = explode('|', $data);
array_pop($users);
$index = 1;
foreach ($users as $u) {
if(explode('@', $u)[0]=='admin'){
$isadmin = '是';
$pass = 'flag就是管理员的密码，不过我隐藏了';
$content = '删除此条记录后flag就会消失';
}else{
$pass = explode('@', $u)[1];
}
array_push($ret['data'], array(
'id'=>$index,
'username'=>explode('@', $u)[0],
'password'=>$pass,
'isAdmin'=>$isadmin,
'content'=>$content
));
$index +=1;
}
$ret['count']=$index;
$start = ($page-1)*$limit;
$ret['data']=array_slice($ret['data'], $start,$limit,true);
return json_encode($ret);
}
function addUser($data,$username,$password){
$ret = array(
'code'=>0,
'message'=>'添加成功'
);
if(existsUser($data,$username)==0){
$s = $data.$username.'@'.$password.'|';
file_put_contents(DB_PATH, $s);
}else{
$ret['code']=-1;
$ret['message']='用户已存在';
}
return json_encode($ret);
}
function updateUser($data,$username,$password){
$ret = array(
'code'=>0,
'message'=>'更新成功'
);
if(existsUser($data,$username)>0 && $username!='admin'){
$s = preg_replace('/'.$username.'@[0-9a-zA-Z]+\|/', $username.'@'.$password.'|', $data);
file_put_contents(DB_PATH, $s);
}else{
$ret['code']=-1;
$ret['message']='用户不存在或无权更新';
}
return json_encode($ret);
}
function delUser($data,$username){
$ret = array(
'code'=>0,
'message'=>'删除成功'
);
if(existsUser($data,$username)>0 && $username!='admin'){
$s = preg_replace('/'.$username.'@[0-9a-zA-Z]+\|/', '', $data);
file_put_contents(DB_PATH, $s);
}else{
$ret['code']=-1;
$ret['message']='用户不存在或无权删除';
}
return json_encode($ret);
}
function existsUser($data,$username){
return preg_match('/'.$username.'@[0-9a-zA-Z]+\|/', $data);
}
function backupUsers(){
$file_name = DB_PATH;
if (! file_exists ($file_name )) {
header('HTTP/1.1 404 NOT FOUND');
} else {
$file = fopen ($file_name, "rb" );
Header ( "Content-type: application/octet-stream" );
Header ( "Accept-Ranges: bytes" );
Header ( "Accept-Length: " . filesize ($file_name));
Header ( "Content-Disposition: attachment; filename=backup.dat");
echo str_replace(FLAG645, 'flag就在这里，可惜不能给你', fread ( $file, filesize ($file_name)));
fclose ( $file );
exit ();
}
}
function getArray($total, $times, $min, $max)
{
$data = array();
if ($min * $times > $total) {
return array();
}
if ($max * $times < $total) {
return array();
}
while ($times >= 1) {
$times--;
$kmix = max($min, $total - $times * $max);
$kmax = min($max, $total - $times * $min);
$kAvg = $total / ($times + 1);
$kDis = min($kAvg - $kmix, $kmax - $kAvg);
$r = ((float)(rand(1, 10000) / 10000) - 0.5) * $kDis * 2;
$k = round($kAvg + $r);
$total -= $k;
$data[] = $k;
}
return $data;
}
function recoveryUsers(){
$ret = array(
'code'=>0,
'message'=>'恢复成功'
);
if(isset($_FILES['file']) && $_FILES['file']['size']<1024*1024){
$file_name= $_FILES['file']['tmp_name'];
$result = move_uploaded_file($file_name, DB_PATH);
if($result===false){
$ret['message']='数据恢复失败 file_name'.$file_name.' DB_PATH='.DB_PATH;
}
}else{
$ret['message']='数据恢复失败';
}
return json_encode($ret);
}
function phpInfoTest(){
return phpinfo();
}
function authKeyValidate($auth){
$ret = array(
'code'=>0,
'message'=>$auth==substr(FLAG645, 8)?'验证成功':'验证失败',
'status'=>$auth==substr(FLAG645, 8)?'0':'-1'
);
return json_encode($ret);
}
function remoteUpdate($auth,$address){
$ret = array(
'code'=>0,
'message'=>'更新失败'
);
if($auth!==substr(FLAG645, 8)){
$ret['message']='权限key验证失败';
return json_encode($ret);
}else{
$content = file_get_contents($address);
$ret['message']=($content!==false?$content:'地址不可达');
}
return json_encode($ret);
}
function evilString($m){
$key = '372619038';
$content = call_user_func($m);
if(stripos($content, $key)!==FALSE){
echo shell_exec('cat /FLAG/FLAG647');
}else{
echo 'you are not 372619038?';
}
}
function evilClass($m,$k){
class ctfshow{
public $m;
public function construct($m){
$this->$m=$m;
}
}
$ctfshow=new ctfshow($m);
$ctfshow->$m=$m;
if($ctfshow->$m==$m && $k==shell_exec('cat /FLAG/FLAG647')){
echo shell_exec('cat /FLAG/FLAG648');
}else{
echo 'mmmmm?';
}
}
function evilNumber($m,$k){
$number = getArray(1000,20,10,999);
if($number[$m]==$m && $k==shell_exec('cat /FLAG/FLAG648')){
echo shell_exec('cat /FLAG/FLAG649');
}else{
echo 'number is right?';
}
}
function evilFunction($m,$k){
$key = 'ffffffff';
$content = call_user_func($m);
if(stripos($content, $key)!==FALSE && $k==shell_exec('cat /FLAG/FLAG649')){
echo shell_exec('cat /FLAG/FLAG650');
}else{
echo 'you are not ffffffff?';
}
}
function evilArray($m,$k){
$arrays=unserialize($m);
if($arrays!==false){
if(array_key_exists('username', $arrays) && in_array('ctfshow', get_object_vars($arrays)) && $k==shell_exec('cat /FLAG/FLAG650')){
echo shell_exec('cat /FLAG/FLAG651');
}else{
echo 'array?';
}
}
}
function netTest($cmd){
$ret = array(
'code'=>0,
'message'=>'命令执行失败'
);
if(preg_match('/^[A-Za-z]+$/', $cmd)){
$res = shell_exec($cmd);
stripos(PHP_OS,'WIN')!==FALSE?$ret['message']=iconv("GBK", "UTF-8", $res):$ret['message']=$res;
}
return json_encode($ret);
}
|
