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详解php curl带有csrf-token验证模拟提交方法

程序员文章站 2022-06-12 21:34:53
通常为了安全会在表单里加入一个随机的token值来防止csrf攻击。 要想模拟提交有token验证的网站其实也不难。 1.通过正则获取token 2.带上获取...

通常为了安全会在表单里加入一个随机的token值来防止csrf攻击。

要想模拟提交有token验证的网站其实也不难。

1.通过正则获取token
2.带上获取到的token模拟提交

下面是一个成功的例子

目录结构

│ 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

getform.php

<?php
$cookie_file = './cookie/'.time().'.cookie';
$str = getresponse('http://a.curl.com:81/form.php',[],$cookie_file);
setcookie("phpsessid", "vc0heoa6lfsi3gger54pkns152");
preg_match('/<input name="token" type="hidden" value="(.*)"/u', $str, $match);

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

function getresponse($url, $data=[], $cookie_file='', $timeout = 3)
  {
    if(empty($cookie_file))
    {
      $cookie_file = '.cookie';
    }

    $ch = curl_init();
    curl_setopt($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 'caught exception: ', $e->getmessage(), "\n";
    }
    unlink($cookie_file);
  }

form.php

<?php
session_start();
$_session['token'] = md5($_server['request_time']);
$_session['time'] = date("y-m-d h:i:s");
session_write_close();
//echo $_session['auth'];
?>
<!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['token']?>"></p>
  <p><input type="submit"></p>
</form>
 </body>
</html>

post.php

<?php
session_start();
if(empty($_post['token']))
{
  exit ("token is empty!");
}

if(empty($_session['token']))
{
 exit ("session is empty");
}

if($_post['token'] != $_session['token'])
{
  exit ("token ");
} else
{
  unset($_session['token']);
}

echo php_eol;
echo "pass";
print_r($_request);

echo php_eol;
print_r($_server);

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。