Detailed explanation of php curl with csrf-token verification simulation submission method php example-PHP Tutorial-php.cn

Detailed explanation of php curl with csrf-token verification simulation submission method php example

jacklove

Release： 2023-04-01 20:18:02

Original

1655 people have browsed it

This article mainly introduces the detailed explanation of the simulated submission method of php curl with csrf-token verification. The editor thinks it is quite good. Now I will share it with you and give it as a reference. Let’s follow the editor and take a look.

Usually for security reasons, a random token value is added to the form to prevent CSRF attacks.

It is actually not difficult to simulate submitting a website with token verification.

1. Obtain the token through regular expressions
2. Bring the obtained token to simulate submission

The following is a successful example

Table of Contents Structure

│ form.php –需要模拟的表单 
│ getForm.php – 模拟提交程序 
│ post.php –表单验证程序 
│ 
└─cookie – cookie存放目录

Copy after login

getForm.php

<?php
$cookie_file = &#39;./cookie/&#39;.time().&#39;.cookie&#39;;
$str = getResponse(&#39;http://a.curl.com:81/form.php&#39;,[],$cookie_file);
setcookie("PHPSESSID", "vc0heoa6lfsi3gger54pkns152");
preg_match(&#39;/<input name="token" type="hidden" value="(.*)"/U&#39;, $str, $match);

$post[&#39;token&#39;] = $match[1];
$post[&#39;name&#39;] = &#39;3333333&#39;;
$post[&#39;password&#39;] = &#39;12121213&#39;;
print_r(getResponse(&#39;http://a.curl.com:81/post.php&#39;, $post, $cookie_file));

function getResponse($url, $data=[], $cookie_file=&#39;&#39;, $timeout = 3)
  {
    if(empty($cookie_file))
    {
      $cookie_file = &#39;.cookie&#39;;
    }

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_REFERER, "https://www.baidu.com");  //构造来路
    curl_setopt($ch, CURLOPT_USERAGENT,"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.59 Safari/537.36");

    if(!empty($data))
    {
      curl_setopt($ch, CURLOPT_POST, true);
      curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    }
    curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);// 取cookie的参数是
    curl_setopt ($ch, CURLOPT_COOKIEFILE, $cookie_file); //发送cookie
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
    try
    {
       $handles = curl_exec($ch);
       curl_close($ch);
       return $handles;
    }
    catch (Exception $e)
    {
      echo &#39;Caught exception: &#39;, $e->getMessage(), "\n";
    }
    unlink($cookie_file);
  }

Copy after login

form.php

<?php
session_start();
$_SESSION[&#39;token&#39;] = md5($_SERVER[&#39;REQUEST_TIME&#39;]);
$_SESSION[&#39;time&#39;] = date("Y-m-d H:i:s");
session_write_close();
//echo $_SESSION[&#39;auth&#39;];
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
 <title> new document </title>
 <meta name="generator" content="editplus" />
 <meta name="author" content="" />
 <meta name="keywords" content="" />
 <meta name="description" content="" />
 </head>
 <body>
<form action="post.php" method="post">
  <p><input name="name" type="text"></p>
  <p><input name="password" type="password"></p>
  <p><input name="token" type="hidden" value="<?php echo $_SESSION[&#39;token&#39;]?>"></p>
  <p><input type="submit"></p>
</form>
 </body>
</html>

Copy after login

post.php

<?php
session_start();
if(empty($_POST[&#39;token&#39;]))
{
  exit ("token is empty!");
}

if(empty($_SESSION[&#39;token&#39;]))
{
 exit ("session is empty");
}

if($_POST[&#39;token&#39;] != $_SESSION[&#39;token&#39;])
{
  exit ("token ");
} else
{
  unset($_SESSION[&#39;token&#39;]);
}

echo PHP_EOL;
echo "pass";
print_r($_REQUEST);

echo PHP_EOL;
print_r($_SERVER);

Copy after login

The above is the entire content of this article, I hope it will be helpful to everyone Learning is helpful, and I hope everyone will support php Chinese website.

Articles you may be interested in:

PHP iterator and implementation and use of iteration analysis PHP skills

PHP operates MongoDB to implement the add, delete, modify and query function php skills

PHP operates Redis common skills summary php skills

The above is the detailed content of Detailed explanation of php curl with csrf-token verification simulation submission method php example. For more information, please follow other related articles on the PHP Chinese website!