<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\captcha\plugins;
class recaptcha extends captcha_abstract
{
var $recaptcha_server = 'http://www.google.com/recaptcha/api';
var $recaptcha_server_secure = 'https://www.google.com/recaptcha/api'; // class constants :(
var $response;
/**
* Constructor
*/
public function __construct()
{
global $request;
$this->recaptcha_server = $request->is_secure() ? $this->recaptcha_server_secure : $this->recaptcha_server;
}
function init($type)
{
global $user, $request;
$user->add_lang('captcha_recaptcha');
parent::init($type);
$this->response = $request->variable('g-recaptcha-response', '');
}
public function is_available()
{
global $config, $user;
$user->add_lang('captcha_recaptcha');
return (isset($config['recaptcha_pubkey']) && !empty($config['recaptcha_pubkey']));
}
/**
* API function
*/
function has_config()
{
return true;
}
static public function get_name()
{
return 'CAPTCHA_RECAPTCHA';
}
/**
* This function is implemented because required by the upper class, but is never used for reCaptcha.
*/
function get_generator_class()
{
throw new \Exception('No generator class given.');
}
function acp_page($id, $module)
{
global $config, $template, $user, $phpbb_log, $request;
$captcha_vars = array(
'recaptcha_pubkey' => 'RECAPTCHA_PUBKEY',
'recaptcha_privkey' => 'RECAPTCHA_PRIVKEY',
);
$module->tpl_name = 'captcha_recaptcha_acp';
$module->page_title = 'ACP_VC_SETTINGS';
$form_key = 'acp_captcha';
add_form_key($form_key);
$submit = $request->variable('submit', '');
if ($submit && check_form_key($form_key))
{
$captcha_vars = array_keys($captcha_vars);
foreach ($captcha_vars as $captcha_var)
{
$value = $request->variable($captcha_var, '');
if ($value)
{
$config->set($captcha_var, $value);
}
}
$phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_CONFIG_VISUAL');
trigger_error($user->lang['CONFIG_UPDATED'] . adm_back_link($module->u_action));
}
else if ($submit)
{
trigger_error($user->lang['FORM_INVALID'] . adm_back_link($module->u_action));
}
else
{
foreach ($captcha_vars as $captcha_var => $template_var)
{
$var = (isset($_REQUEST[$captcha_var])) ? $request->variable($captcha_var, '') : ((isset($config[$captcha_var])) ? $config[$captcha_var] : '');
$template->assign_var($template_var, $var);
}
$template->assign_vars(array(
'CAPTCHA_PREVIEW' => $this->get_demo_template($id),
'CAPTCHA_NAME' => $this->get_service_name(),
'U_ACTION' => $module->u_action,
));
}
}
// not needed
function execute_demo()
{
}
// not needed
function execute()
{
}
function get_template()
{
global $config, $user, $template, $phpbb_root_path, $phpEx;
if ($this->is_solved())
{
return false;
}
else
{
$contact_link = phpbb_get_board_contact_link($config, $phpbb_root_path, $phpEx);
$explain = $user->lang(($this->type != CONFIRM_POST) ? 'CONFIRM_EXPLAIN' : 'POST_CONFIRM_EXPLAIN', '<a href="' . $contact_link . '">', '</a>');
$template->assign_vars(array(
'RECAPTCHA_SERVER' => $this->recaptcha_server,
'RECAPTCHA_PUBKEY' => isset($config['recaptcha_pubkey']) ? $config['recaptcha_pubkey'] : '',
'S_RECAPTCHA_AVAILABLE' => self::is_available(),
'S_CONFIRM_CODE' => true,
'S_TYPE' => $this->type,
'L_CONFIRM_EXPLAIN' => $explain,
));
return 'captcha_recaptcha.html';
}
}
function get_demo_template($id)
{
return $this->get_template();
}
function get_hidden_fields()
{
$hidden_fields = array();
// this is required for posting.php - otherwise we would forget about the captcha being already solved
if ($this->solved)
{
$hidden_fields['confirm_code'] = $this->code;
}
$hidden_fields['confirm_id'] = $this->confirm_id;
return $hidden_fields;
}
function uninstall()
{
$this->garbage_collect(0);
}
function install()
{
return;
}
function validate()
{
if (!parent::validate())
{
return false;
}
else
{
return $this->recaptcha_check_answer();
}
}
/**
* Calls an HTTP POST function to verify if the user's guess was correct
*
* @return bool|string Returns false on success or error string on failure.
*/
function recaptcha_check_answer()
{
global $config, $user;
//discard spam submissions
if ($this->response == null || strlen($this->response) == 0)
{
return $user->lang['RECAPTCHA_INCORRECT'];
}
$recaptcha = new \ReCaptcha\ReCaptcha($config['recaptcha_privkey']);
$result = $recaptcha->verify($this->response, $user->ip);
if ($result->isSuccess())
{
$this->solved = true;
return false;
}
else
{
return $user->lang['RECAPTCHA_INCORRECT'];
}
}
}