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home/lmsyaran/public_html/j3/plugins/captcha/recaptcha/recaptcha.php000064400000023143151164463770021642
0ustar00<?php
/**
* @package Joomla.Plugin
* @subpackage Captcha
*
* @copyright Copyright (C) 2005 - 2020 Open Source Matters, Inc. All
rights reserved.
* @license GNU General Public License version 2 or later; see
LICENSE.txt
*/
defined('_JEXEC') or die;
use Joomla\CMS\Captcha\Google\HttpBridgePostRequestMethod;
use Joomla\Utilities\IpHelper;
/**
* Recaptcha Plugin
* Based on the official recaptcha library(
https://packagist.org/packages/google/recaptcha )
*
* @since 2.5
*/
class PlgCaptchaRecaptcha extends JPlugin
{
/**
* Load the language file on instantiation.
*
* @var boolean
* @since 3.1
*/
protected $autoloadLanguage = true;
/**
* Reports the privacy related capabilities for this plugin to site
administrators.
*
* @return array
*
* @since 3.9.0
*/
public function onPrivacyCollectAdminCapabilities()
{
$this->loadLanguage();
return array(
JText::_('PLG_CAPTCHA_RECAPTCHA') => array(
JText::_('PLG_RECAPTCHA_PRIVACY_CAPABILITY_IP_ADDRESS'),
)
);
}
/**
* Initialise the captcha
*
* @param string $id The id of the field.
*
* @return Boolean True on success, false otherwise
*
* @since 2.5
* @throws \RuntimeException
*/
public function onInit($id = 'dynamic_recaptcha_1')
{
$pubkey = $this->params->get('public_key', '');
if ($pubkey === '')
{
throw new
\RuntimeException(JText::_('PLG_RECAPTCHA_ERROR_NO_PUBLIC_KEY'));
}
if ($this->params->get('version', '1.0') ===
'1.0')
{
JHtml::_('jquery.framework');
$theme = $this->params->get('theme',
'clean');
$file =
'https://www.google.com/recaptcha/api/js/recaptcha_ajax.js';
JHtml::_('script', $file);
JFactory::getDocument()->addScriptDeclaration('jQuery( document
).ready(function()
{Recaptcha.create("' . $pubkey . '", "' .
$id . '", {theme: "' . $theme . '",' .
$this->_getLanguage() . 'tabindex: 0});});');
}
else
{
// Load callback first for browser compatibility
JHtml::_('script',
'plg_captcha_recaptcha/recaptcha.min.js',
array('version' => 'auto', 'relative'
=> true));
$file =
'https://www.google.com/recaptcha/api.js?onload=JoomlaInitReCaptcha2&render=explicit&hl='
. JFactory::getLanguage()->getTag();
JHtml::_('script', $file);
}
return true;
}
/**
* Gets the challenge HTML
*
* @param string $name The name of the field. Not Used.
* @param string $id The id of the field.
* @param string $class The class of the field.
*
* @return string The HTML to be embedded in the form.
*
* @since 2.5
*/
public function onDisplay($name = null, $id =
'dynamic_recaptcha_1', $class = '')
{
$dom = new \DOMDocument('1.0', 'UTF-8');
$ele = $dom->createElement('div');
$ele->setAttribute('id', $id);
if ($this->params->get('version', '1.0') ===
'1.0')
{
$ele->setAttribute('class', $class);
}
else
{
$ele->setAttribute('class', ((trim($class) == '')
? 'g-recaptcha' : ($class . ' g-recaptcha')));
$ele->setAttribute('data-sitekey',
$this->params->get('public_key', ''));
$ele->setAttribute('data-theme',
$this->params->get('theme2', 'light'));
$ele->setAttribute('data-size',
$this->params->get('size', 'normal'));
$ele->setAttribute('data-tabindex',
$this->params->get('tabindex', '0'));
$ele->setAttribute('data-callback',
$this->params->get('callback', ''));
$ele->setAttribute('data-expired-callback',
$this->params->get('expired_callback', ''));
$ele->setAttribute('data-error-callback',
$this->params->get('error_callback', ''));
}
$dom->appendChild($ele);
return $dom->saveHTML($ele);
}
/**
* Calls an HTTP POST function to verify if the user's guess was
correct
*
* @param string $code Answer provided by user. Not needed for the
Recaptcha implementation
*
* @return True if the answer is correct, false otherwise
*
* @since 2.5
* @throws \RuntimeException
*/
public function onCheckAnswer($code = null)
{
$input = \JFactory::getApplication()->input;
$privatekey = $this->params->get('private_key');
$version = $this->params->get('version',
'1.0');
$remoteip = IpHelper::getIp();
switch ($version)
{
case '1.0':
$challenge = $input->get('recaptcha_challenge_field',
'', 'string');
$response = $code ? $code :
$input->get('recaptcha_response_field', '',
'string');
$spam = ($challenge === '' || $response ===
'');
break;
case '2.0':
// Challenge Not needed in 2.0 but needed for getResponse call
$challenge = null;
$response = $code ? $code :
$input->get('g-recaptcha-response', '',
'string');
$spam = ($response === '');
break;
}
// Check for Private Key
if (empty($privatekey))
{
throw new
\RuntimeException(JText::_('PLG_RECAPTCHA_ERROR_NO_PRIVATE_KEY'));
}
// Check for IP
if (empty($remoteip))
{
throw new
\RuntimeException(JText::_('PLG_RECAPTCHA_ERROR_NO_IP'));
}
// Discard spam submissions
if ($spam)
{
throw new
\RuntimeException(JText::_('PLG_RECAPTCHA_ERROR_EMPTY_SOLUTION'));
}
return $this->getResponse($privatekey, $remoteip, $response,
$challenge);
}
/**
* Get the reCaptcha response.
*
* @param string $privatekey The private key for authentication.
* @param string $remoteip The remote IP of the visitor.
* @param string $response The response received from Google.
* @param string $challenge The challenge field from the reCaptcha.
Only for 1.0
*
* @return bool True if response is good | False if response is bad.
*
* @since 3.4
* @throws \RuntimeException
*/
private function getResponse($privatekey, $remoteip, $response, $challenge
= null)
{
$version = $this->params->get('version',
'1.0');
switch ($version)
{
case '1.0':
$response = $this->_recaptcha_http_post(
'www.google.com', '/recaptcha/api/verify',
array(
'privatekey' => $privatekey,
'remoteip' => $remoteip,
'challenge' => $challenge,
'response' => $response
)
);
$answers = explode("\n", $response[1]);
if (trim($answers[0]) !== 'true')
{
// @todo use exceptions here
$this->_subject->setError(JText::_('PLG_RECAPTCHA_ERROR_'
. strtoupper(str_replace('-', '_', $answers[1]))));
return false;
}
break;
case '2.0':
$reCaptcha = new \ReCaptcha\ReCaptcha($privatekey, new
HttpBridgePostRequestMethod);
$response = $reCaptcha->verify($response, $remoteip);
if (!$response->isSuccess())
{
foreach ($response->getErrorCodes() as $error)
{
throw new \RuntimeException($error);
}
return false;
}
break;
}
return true;
}
/**
* Encodes the given data into a query string format.
*
* @param array $data Array of string elements to be encoded
*
* @return string Encoded request
*
* @since 2.5
*/
private function _recaptcha_qsencode($data)
{
$req = '';
foreach ($data as $key => $value)
{
$req .= $key . '=' . urlencode(stripslashes($value)) .
'&';
}
// Cut the last '&'
$req = rtrim($req, '&');
return $req;
}
/**
* Submits an HTTP POST to a reCAPTCHA server.
*
* @param string $host Host name to POST to.
* @param string $path Path on host to POST to.
* @param array $data Data to be POSTed.
* @param int $port Optional port number on host.
*
* @return array Response
*
* @since 2.5
*/
private function _recaptcha_http_post($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;
$response = '';
if (($fs = @fsockopen($host, $port, $errno, $errstr, 10)) === false)
{
die('Could not open socket');
}
fwrite($fs, $http_request);
while (!feof($fs))
{
// One TCP-IP packet
$response .= fgets($fs, 1160);
}
fclose($fs);
$response = explode("\r\n\r\n", $response, 2);
return $response;
}
/**
* Get the language tag or a custom translation
*
* @return string
*
* @since 2.5
*/
private function _getLanguage()
{
$language = JFactory::getLanguage();
$tag = explode('-', $language->getTag());
$tag = $tag[0];
$available = array('en', 'pt', 'fr',
'de', 'nl', 'ru', 'es',
'tr');
if (in_array($tag, $available))
{
return "lang : '" . $tag . "',";
}
// If the default language is not available, let's search for a
custom translation
if ($language->hasKey('PLG_RECAPTCHA_CUSTOM_LANG'))
{
$custom[] = 'custom_translations : {';
$custom[] = "\t" . 'instructions_visual : "' .
JText::_('PLG_RECAPTCHA_INSTRUCTIONS_VISUAL') .
'",';
$custom[] = "\t" . 'instructions_audio : "' .
JText::_('PLG_RECAPTCHA_INSTRUCTIONS_AUDIO') .
'",';
$custom[] = "\t" . 'play_again : "' .
JText::_('PLG_RECAPTCHA_PLAY_AGAIN') . '",';
$custom[] = "\t" . 'cant_hear_this : "' .
JText::_('PLG_RECAPTCHA_CANT_HEAR_THIS') . '",';
$custom[] = "\t" . 'visual_challenge : "' .
JText::_('PLG_RECAPTCHA_VISUAL_CHALLENGE') . '",';
$custom[] = "\t" . 'audio_challenge : "' .
JText::_('PLG_RECAPTCHA_AUDIO_CHALLENGE') . '",';
$custom[] = "\t" . 'refresh_btn : "' .
JText::_('PLG_RECAPTCHA_REFRESH_BTN') . '",';
$custom[] = "\t" . 'help_btn : "' .
JText::_('PLG_RECAPTCHA_HELP_BTN') . '",';
$custom[] = "\t" . 'incorrect_try_again : "' .
JText::_('PLG_RECAPTCHA_INCORRECT_TRY_AGAIN') .
'",';
$custom[] = '},';
$custom[] = "lang : '" . $tag . "',";
return implode("\n", $custom);
}
// If nothing helps fall back to english
return '';
}
}