[Summary view] [Print] [Text view]

   1  <?php
   2  /**
   3  *
   4  * This file is part of the phpBB Forum Software package.
   5  *
   6  * @copyright (c) phpBB Limited <https://www.phpbb.com>
   7  * @license GNU General Public License, version 2 (GPL-2.0)
   8  *
   9  * For full copyright and license information, please see
  10  * the docs/CREDITS.txt file.
  11  *
  12  */
  13  
  14  namespace phpbb\captcha\plugins;
  15  
  16  class recaptcha extends captcha_abstract
  17  {
  18      var $recaptcha_server = 'http://www.google.com/recaptcha/api';
  19      var $recaptcha_server_secure = 'https://www.google.com/recaptcha/api'; // class constants :(
  20  
  21      var $response;
  22  
  23      /**
  24      * Constructor
  25      */
  26  	public function __construct()
  27      {
  28          global $request;
  29          $this->recaptcha_server = $request->is_secure() ? $this->recaptcha_server_secure : $this->recaptcha_server;
  30      }
  31  
  32  	function init($type)
  33      {
  34          global $user, $request;
  35  
  36          $user->add_lang('captcha_recaptcha');
  37          parent::init($type);
  38          $this->response = $request->variable('g-recaptcha-response', '');
  39      }
  40  
  41  	public function is_available()
  42      {
  43          global $config, $user;
  44          $user->add_lang('captcha_recaptcha');
  45          return (isset($config['recaptcha_pubkey']) && !empty($config['recaptcha_pubkey']));
  46      }
  47  
  48      /**
  49      *  API function
  50      */
  51  	function has_config()
  52      {
  53          return true;
  54      }
  55  
  56  	static public function get_name()
  57      {
  58          return 'CAPTCHA_RECAPTCHA';
  59      }
  60  
  61      /**
  62      * This function is implemented because required by the upper class, but is never used for reCaptcha.
  63      */
  64  	function get_generator_class()
  65      {
  66          throw new \Exception('No generator class given.');
  67      }
  68  
  69  	function acp_page($id, $module)
  70      {
  71          global $config, $template, $user, $phpbb_log, $request;
  72  
  73          $captcha_vars = array(
  74              'recaptcha_pubkey'                => 'RECAPTCHA_PUBKEY',
  75              'recaptcha_privkey'                => 'RECAPTCHA_PRIVKEY',
  76          );
  77  
  78          $module->tpl_name = 'captcha_recaptcha_acp';
  79          $module->page_title = 'ACP_VC_SETTINGS';
  80          $form_key = 'acp_captcha';
  81          add_form_key($form_key);
  82  
  83          $submit = $request->variable('submit', '');
  84  
  85          if ($submit && check_form_key($form_key))
  86          {
  87              $captcha_vars = array_keys($captcha_vars);
  88              foreach ($captcha_vars as $captcha_var)
  89              {
  90                  $value = $request->variable($captcha_var, '');
  91                  if ($value)
  92                  {
  93                      $config->set($captcha_var, $value);
  94                  }
  95              }
  96  
  97              $phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_CONFIG_VISUAL');
  98              trigger_error($user->lang['CONFIG_UPDATED'] . adm_back_link($module->u_action));
  99          }
 100          else if ($submit)
 101          {
 102              trigger_error($user->lang['FORM_INVALID'] . adm_back_link($module->u_action));
 103          }
 104          else
 105          {
 106              foreach ($captcha_vars as $captcha_var => $template_var)
 107              {
 108                  $var = (isset($_REQUEST[$captcha_var])) ? $request->variable($captcha_var, '') : ((isset($config[$captcha_var])) ? $config[$captcha_var] : '');
 109                  $template->assign_var($template_var, $var);
 110              }
 111  
 112              $template->assign_vars(array(
 113                  'CAPTCHA_PREVIEW'    => $this->get_demo_template($id),
 114                  'CAPTCHA_NAME'        => $this->get_service_name(),
 115                  'U_ACTION'            => $module->u_action,
 116              ));
 117  
 118          }
 119      }
 120  
 121      // not needed
 122  	function execute_demo()
 123      {
 124      }
 125  
 126      // not needed
 127  	function execute()
 128      {
 129      }
 130  
 131  	function get_template()
 132      {
 133          global $config, $user, $template, $phpbb_root_path, $phpEx;
 134  
 135          if ($this->is_solved())
 136          {
 137              return false;
 138          }
 139          else
 140          {
 141              $contact_link = phpbb_get_board_contact_link($config, $phpbb_root_path, $phpEx);
 142              $explain = $user->lang(($this->type != CONFIRM_POST) ? 'CONFIRM_EXPLAIN' : 'POST_CONFIRM_EXPLAIN', '<a href="' . $contact_link . '">', '</a>');
 143  
 144              $template->assign_vars(array(
 145                  'RECAPTCHA_SERVER'            => $this->recaptcha_server,
 146                  'RECAPTCHA_PUBKEY'            => isset($config['recaptcha_pubkey']) ? $config['recaptcha_pubkey'] : '',
 147                  'S_RECAPTCHA_AVAILABLE'        => self::is_available(),
 148                  'S_CONFIRM_CODE'            => true,
 149                  'S_TYPE'                    => $this->type,
 150                  'L_CONFIRM_EXPLAIN'            => $explain,
 151              ));
 152  
 153              return 'captcha_recaptcha.html';
 154          }
 155      }
 156  
 157  	function get_demo_template($id)
 158      {
 159          return $this->get_template();
 160      }
 161  
 162  	function get_hidden_fields()
 163      {
 164          $hidden_fields = array();
 165  
 166          // this is required for posting.php - otherwise we would forget about the captcha being already solved
 167          if ($this->solved)
 168          {
 169              $hidden_fields['confirm_code'] = $this->code;
 170          }
 171          $hidden_fields['confirm_id'] = $this->confirm_id;
 172          return $hidden_fields;
 173      }
 174  
 175  	function uninstall()
 176      {
 177          $this->garbage_collect(0);
 178      }
 179  
 180  	function install()
 181      {
 182          return;
 183      }
 184  
 185  	function validate()
 186      {
 187          if (!parent::validate())
 188          {
 189              return false;
 190          }
 191          else
 192          {
 193              return $this->recaptcha_check_answer();
 194          }
 195      }
 196  
 197      /**
 198      * Calls an HTTP POST function to verify if the user's guess was correct
 199      *
 200      * @return bool|string Returns false on success or error string on failure.
 201      */
 202  	function recaptcha_check_answer()
 203      {
 204          global $config, $user;
 205  
 206          //discard spam submissions
 207          if ($this->response == null || strlen($this->response) == 0)
 208          {
 209              return $user->lang['RECAPTCHA_INCORRECT'];
 210          }
 211  
 212          $recaptcha = new \ReCaptcha\ReCaptcha($config['recaptcha_privkey']);
 213          $result = $recaptcha->verify($this->response, $user->ip);
 214  
 215          if ($result->isSuccess())
 216          {
 217              $this->solved = true;
 218              return false;
 219          }
 220          else
 221          {
 222              return $user->lang['RECAPTCHA_INCORRECT'];
 223          }
 224      }
 225  }