详解php curl带有csrf-token验证模拟提交方法

2024-05-05 00:03:16

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通常为了安全会在表单里加入一个随机的php/213287.html">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.phpcms/6381.html">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

<?phpsession_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

<?phpsession_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);

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