Google Recaptcha被表单操作忽略

Question

只集成了Google Recaptcha。我将此表单用作POST安全交易站点（API）的安全结帐。

我的挑战是，我有如下形式的行动=

"action="https://securepayments.cardconnect.com/hpp/payment/" 

和事件，如果我使用：

if (isset($_POST['submit'])) { 

验证验证码:: ::它仍然只是径直到窗体操作网址，而不验证验证码。

这里是更多的代码：

$secret = '-- XX --'; 
    $response = $_POST['g-recaptcha-response']; 
    $remoteip = $_SERVER['REMOTE_ADDR']; 

    $url = file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=$secret&response=$response&remoteip=$remoteip"); 

    $res = json_decode($unpass, TRUE); 

    $result = json_decode($url, TRUE); 
    if ($result['success'] == 1) { 
     echo $_POST['name']; 
     echo $_POST['companyname']; 

    } 
    else { echo 'you are a robot'; } 
} 

表单操作URL通过POST /隐变量通过MID /密码连接到它与API认证。我无法弄清楚如何整合使用recaptcha的解决方案，然后执行表单操作。任何帮助都是极好的！

Answer 1

function isValid() 
      { 
       try { 

        $url = 'https://www.google.com/recaptcha/api/siteverify'; 
        $data = ['secret' => 'secret', 
          'response' => $_POST['g-recaptcha-response'], 
          'remoteip' => $_SERVER['REMOTE_ADDR']]; 

        $options = [ 
         'http' => [ 
          'header' => "Content-type: application/x-www-form-urlencoded\r\n", 
          'method' => 'POST', 
          'content' => http_build_query($data) 
         ] 
        ]; 

        $context = stream_context_create($options); 
        $result = file_get_contents($url, false, $context); 
        return json_decode($result)->success; 
       } 
       catch (Exception $e) { 
        return null; 
       } 
      } 

if($_POST && isValid()) 
{ 
//do stuff 
} 

Answer 2

为什么不使用Recaptcha库？

<?php if (!defined('BASEPATH')) exit('No direct script access allowed'); 

class Recaptcha 
{ 
    /* 
    * This is a PHP library that handles calling reCAPTCHA. 
    * - Documentation and latest version 
    *   http://recaptcha.net/plugins/php/ 
    * - Get a reCAPTCHA API Key 
    *   https://www.google.com/recaptcha/admin/create 
    * - Discussion group 
    *   http://groups.google.com/group/recaptcha 
    * 
    * Copyright (c) 2007 reCAPTCHA -- http://recaptcha.net 
    * AUTHORS: 
    * Mike Crawford 
    * Ben Maurer 
    * 
    * CONTRIBUTION: 
    * Codeigniter version - 23.08.2012 by Christer Nordbø, Norway. 
    * 
    * Permission is hereby granted, free of charge, to any person obtaining a copy 
    * of this software and associated documentation files (the "Software"), to deal 
    * in the Software without restriction, including without limitation the rights 
    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
    * copies of the Software, and to permit persons to whom the Software is 
    * furnished to do so, subject to the following conditions: 
    * 
    * The above copyright notice and this permission notice shall be included in 
    * all copies or substantial portions of the Software. 
    * 
    * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
    * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
    * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
    * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
    * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
    * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
    * THE SOFTWARE. 
    * 
    * 
    * UPDATE HISTORY: 
    * 28.08.2013 - Made recaptcha_check_answer() function bit simpler on default 
    *    fields as html is generated by recaptcha_get_html() function. 
    * Updated by - Puneet Kalra (https://github.com/puneetkay) 
    */ 

    /** 
    * The reCAPTCHA server URL's 
    */ 

    const RECAPTCHA_API_SERVER = "http://www.google.com/recaptcha/api"; 
    const RECAPTCHA_API_SECURE_SERVER = "https://www.google.com/recaptcha/api"; 
    const RECAPTCHA_VERIFY_SERVER = "www.google.com"; 

    protected $is_valid; 
    protected $error; 

    //Remember to obtain the Public and Private key @ https://www.google.com/recaptcha/admin/create 
    protected $public_key = "YOUR PUBLIC KEY"; 
    protected $privkey = "YOUR PRIVATE KEY"; 
    protected $options = array(); 

    function __construct() 
    { 
     log_message('debug', "RECAPTCHA Class Initialized."); 

     $this->_ci =& get_instance(); 

     //Load the CI Config file for recaptcha 
     $this->_ci->load->config('recaptcha'); 
     //load in the values from the config file. 
     $this->public_key = $this->_ci->config->item('public_key'); 
     $this->privkey = $this->_ci->config->item('private_key'); 
     $this->options = $this->_ci->config->item('recaptcha_options'); 

     //Lets do some basic error handling to see if the configuration is A-OK. 
     $temp_error_msg = ''; 
     if ($this->public_key === 'YOUR PUBLIC KEY') { 
      $temp_error_msg .= 'You need to set your public key in the config file <br />'; 
     } 

     if ($this->privkey === 'YOUR PRIVATE KEY') { 
      $temp_error_msg .= 'You need to set your private key in the config file <br />'; 
     } 

     if ($temp_error_msg != '') { 
      show_error($temp_error_msg); 
     } 

    } 

    /** 
    * Encodes the given data into a query string format 
    * @param $data - array of string elements to be encoded 
    * @return string - encoded request 
    */ 
    function recaptcha_qsencode($data) 
    { 
     $req = ""; 
     foreach ($data as $key => $value) 
      $req .= $key . '=' . urlencode(stripslashes($value)) . '&'; 

     // Cut the last '&' 
     $req = substr($req, 0, strlen($req) - 1); 
     return $req; 
    } 


    /** 
    * Submits an HTTP POST to a reCAPTCHA server 
    * @param string $host 
    * @param string $path 
    * @param array $data 
    * @param int port 
    * @return array response 
    */ 
    function recaptcha_http_post($host, $path, $data, $port = 80) 
    { 

     $req = $this->recaptcha_qsencode($data); 

     $http_request = "POST $path HTTP/1.0\r\n"; 
     $http_request .= "Host: $host\r\n"; 
     $http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n"; 
     $http_request .= "Content-Length: " . strlen($req) . "\r\n"; 
     $http_request .= "User-Agent: reCAPTCHA/PHP\r\n"; 
     $http_request .= "\r\n"; 
     $http_request .= $req; 

     $response = ''; 
     if (false == ($fs = @fsockopen($host, $port, $errno, $errstr, 10))) { 
      die ('Could not open socket'); 
     } 

     fwrite($fs, $http_request); 

     while (!feof($fs)) 
      $response .= fgets($fs, 1160); // One TCP-IP packet 
     fclose($fs); 
     $response = explode("\r\n\r\n", $response, 2); 

     return $response; 
    } 


    function recaptcha_get_html($error = null, $use_ssl = false) 
    { 
     if ($this->public_key == null || $this->public_key == '') { 
      die ("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>"); 
     } 

     if ($use_ssl) { 
      $server = self::RECAPTCHA_API_SECURE_SERVER; 
     } else { 
      $server = self::RECAPTCHA_API_SERVER; 
     } 

     $errorpart = ""; 
     if ($error) { 
      $errorpart = "&amp;error=" . $error; 
     } 
     $options = ""; 
     foreach ($this->options as $key => $value) { 
      $options .= $key . ':"' . $value . '", '; 
     } 
     return '<script type="text/javascript"> var RecaptchaOptions = { ' . $options . ' }; </script> 
       <script type="text/javascript" src="' . $server . '/challenge?k=' . $this->public_key . $errorpart . '"></script> 

      <noscript> 
        <iframe src="' . $server . '/noscript?k=' . $this->public_key . $errorpart . '" height="300" width="500" frameborder="0"></iframe><br/> 
        <textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea> 
        <input type="hidden" name="recaptcha_response_field" value="manual_challenge"/> 
      </noscript>'; 
    } 


    /** 
    * Calls an HTTP POST function to verify if the user's guess was correct 
    * @param string $remoteip 
    * @param string $challenge 
    * @param string $response 
    * @param array $extra_params an array of extra variables to post to the server 
    * @return ReCaptchaResponse 
    */ 
    function recaptcha_check_answer($remoteip = null, $challenge = null, $response = null, $extra_params = array()) 
    { 
     if ($this->privkey == null || $this->privkey == '') { 
      die ("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>"); 
     } 

     $remoteip = ($remoteip == null) ? $_SERVER['REMOTE_ADDR'] : $remoteip; 
     $challenge = ($challenge == null) ? $this->_ci->input->post('recaptcha_challenge_field') : $challenge; 
     $response = ($response == null) ? $this->_ci->input->post('recaptcha_response_field') : $response; 

     if ($remoteip == null || $remoteip == '') { 
      die ("For security reasons, you must pass the remote ip to reCAPTCHA"); 
     } 


     //discard spam submissions 
     if ($challenge == null || strlen($challenge) == 0 || $response == null || strlen($response) == 0) { 

      $this->is_valid = false; 
      $this->error = 'incorrect-captcha-sol'; 

     } 

     $response = $this->recaptcha_http_post(self::RECAPTCHA_VERIFY_SERVER, "/recaptcha/api/verify", 
      array(
       'privatekey' => $this->privkey, 
       'remoteip' => $remoteip, 
       'challenge' => $challenge, 
       'response' => $response 
      ) + $extra_params 
     ); 

     $answers = explode("\n", $response [1]); 


     if (trim($answers [0]) == 'true') { 
      $this->is_valid = true; 
     } else { 
      $this->is_valid = false; 
      $this->error = $answers [1]; 
     } 


    } 

    /** 
    * gets a URL where the user can sign up for reCAPTCHA. If your application 
    * has a configuration page where you enter a key, you should provide a link 
    * using this function. 
    * @param string $domain The domain where the page is hosted 
    * @param string $appname The name of your application 
    */ 
    function recaptcha_get_signup_url($domain = null, $appname = 'Codeigniter') 
    { 
     return "https://www.google.com/recaptcha/admin/create?" . $this->recaptcha_qsencode(array('domains' => $domain, 'app' => $appname)); 
    } 

    function recaptcha_aes_pad($val) 
    { 
     $block_size = 16; 
     $numpad = $block_size - (strlen($val) % $block_size); 
     return str_pad($val, strlen($val) + $numpad, chr($numpad)); 
    } 

    /* Mailhide related code */ 

    function recaptcha_aes_encrypt($val, $ky) 
    { 
     if (!function_exists("mcrypt_encrypt")) { 
      die ("To use reCAPTCHA Mailhide, you need to have the mcrypt php module installed."); 
     } 
     $mode = MCRYPT_MODE_CBC; 
     $enc = MCRYPT_RIJNDAEL_128; 
     $val = $this->recaptcha_aes_pad($val); 
     return mcrypt_encrypt($enc, $ky, $val, $mode, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); 
    } 


    function recaptcha_mailhide_urlbase64($x) 
    { 
     return strtr(base64_encode($x), '+/', '-_'); 
    } 

    /* gets the reCAPTCHA Mailhide url for a given email, public key and private key */ 
    function recaptcha_mailhide_url($email) 
    { 
     if ($this->public_key == '' || $this->public_key == null || $this->privkey == "" || $this->privkey == null) { 
      die ("To use reCAPTCHA Mailhide, you have to sign up for a public and private key, " . 
       "you can do so at <a href='http://www.google.com/recaptcha/mailhide/apikey'>http://www.google.com/recaptcha/mailhide/apikey</a>"); 
     } 


     $ky = pack('H*', $this->privkey); 
     $cryptmail = $this->recaptcha_aes_encrypt($email, $ky); 

     return "http://www.google.com/recaptcha/mailhide/d?k=" . $this->public_key . "&c=" . $this->recaptcha_mailhide_urlbase64($cryptmail); 
    } 

    /** 
    * gets the parts of the email to expose to the user. 
    * eg, given johndoe@example,com return ["john", "example.com"]. 
    * the email is then displayed as john...@example.com 
    */ 
    function recaptcha_mailhide_email_parts($email) 
    { 
     $arr = preg_split("/@/", $email); 

     if (strlen($arr[0]) <= 4) { 
      $arr[0] = substr($arr[0], 0, 1); 
     } else if (strlen($arr[0]) <= 6) { 
      $arr[0] = substr($arr[0], 0, 3); 
     } else { 
      $arr[0] = substr($arr[0], 0, 4); 
     } 
     return $arr; 
    } 

    /** 
    * Gets html to display an email address given a public an private key. 
    * to get a key, go to: 
    * 
    * http://www.google.com/recaptcha/mailhide/apikey 
    */ 
    function recaptcha_mailhide_html($email) 
    { 
     $emailparts = $this->recaptcha_mailhide_email_parts($email); 
     $url = $this->recaptcha_mailhide_url($this->public_key, $this->privkey, $email); 

     return htmlentities($emailparts[0]) . "<a href='" . htmlentities($url) . 
     "' onclick=\"window.open('" . htmlentities($url) . "', '', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=300'); return false;\" title=\"Reveal this e-mail address\">...</a>@" . htmlentities($emailparts [1]); 

    } 

    function checkIfIsValid() 
    { 
     if ($this->getIsValid()) { 
      return $this->getIsValid(); 
     } else { 
      return array($this->getIsValid(), $this->getError()); 
     } 
    } 

    function getIsValid() 
    { 
     return $this->is_valid; 
    } 

    function getError() 
    { 
     return $this->error; 
    } 

} 

使用它：

$this->load->library('recaptcha'); 
$this->recaptcha->recaptcha_check_answer(); 
if (!$this->recaptcha->getIsValid()) { 
$this->session->set_flashdata('error', 'Código Captcha incorrecto'); 
redirect(base_url() . 'add'); 
} 
unset($post['recaptcha_challenge_field']); 
unset($post['recaptcha_response_field']);