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   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  /**
  15  * @ignore
  16  */
  17  if (!defined('IN_PHPBB'))
  18  {
  19      exit;
  20  }
  21  
  22  /**
  23  * ucp_login_link
  24  * Allows users of external accounts link those accounts to their phpBB accounts
  25  * during an attempted login.
  26  */
  27  class ucp_login_link
  28  {
  29      /**
  30      * @var    string
  31      */
  32      public $u_action;
  33  
  34      /**
  35      * Generates the ucp_login_link page and handles login link process
  36      *
  37      * @param    int        $id
  38      * @param    string    $mode
  39      */
  40  	function main($id, $mode)
  41      {
  42          global $phpbb_container, $request, $template, $user, $phpbb_dispatcher;
  43          global $phpbb_root_path, $phpEx;
  44  
  45          // Initialize necessary variables
  46          $login_error = null;
  47          $login_link_error = null;
  48          $login_username = null;
  49  
  50          // Build the data array
  51          $data = $this->get_login_link_data_array();
  52  
  53          // Ensure the person was sent here with login_link data
  54          if (empty($data))
  55          {
  56              $login_link_error = $user->lang['LOGIN_LINK_NO_DATA_PROVIDED'];
  57          }
  58  
  59          // Use the auth_provider requested even if different from configured
  60          /* @var $provider_collection \phpbb\auth\provider_collection */
  61          $provider_collection = $phpbb_container->get('auth.provider_collection');
  62          $auth_provider = $provider_collection->get_provider($request->variable('auth_provider', ''));
  63  
  64          // Set the link_method to login_link
  65          $data['link_method'] = 'login_link';
  66  
  67          // Have the authentication provider check that all necessary data is available
  68          $result = $auth_provider->login_link_has_necessary_data($data);
  69          if ($result !== null)
  70          {
  71              $login_link_error = $user->lang[$result];
  72          }
  73  
  74          // Perform link action if there is no error
  75          if (!$login_link_error)
  76          {
  77              if ($request->is_set_post('login'))
  78              {
  79                  $login_username = $request->variable('login_username', '', true, \phpbb\request\request_interface::POST);
  80                  $login_password = $request->untrimmed_variable('login_password', '', true, \phpbb\request\request_interface::POST);
  81  
  82                  $login_result = $auth_provider->login($login_username, $login_password);
  83  
  84                  // We only care if there is or is not an error
  85                  $login_error = $this->process_login_result($login_result);
  86  
  87                  if (!$login_error)
  88                  {
  89                      // Give the user_id to the data
  90                      $data['user_id'] = $login_result['user_row']['user_id'];
  91  
  92                      // The user is now logged in, attempt to link the user to the external account
  93                      $result = $auth_provider->link_account($data);
  94  
  95                      if ($result)
  96                      {
  97                          $login_link_error = $user->lang[$result];
  98                      }
  99                      else
 100                      {
 101                          // Finish login
 102                          $user->session_create($login_result['user_row']['user_id'], false, false, true);
 103  
 104                          // Perform a redirect as the account has been linked
 105                          $this->perform_redirect();
 106                      }
 107                  }
 108              }
 109          }
 110  
 111          $tpl_ary = array(
 112              // Common template elements
 113              'LOGIN_LINK_ERROR'        => $login_link_error,
 114              'PASSWORD_CREDENTIAL'    => 'login_password',
 115              'USERNAME_CREDENTIAL'    => 'login_username',
 116              'S_HIDDEN_FIELDS'        => $this->get_hidden_fields($data),
 117  
 118              // Registration elements
 119              'REGISTER_ACTION'    => append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=register'),
 120  
 121              // Login elements
 122              'LOGIN_ERROR'        => $login_error,
 123              'LOGIN_USERNAME'    => $login_username,
 124          );
 125  
 126          /**
 127          * Event to perform additional actions before ucp_login_link is displayed
 128          *
 129          * @event core.ucp_login_link_template_after
 130          * @var    array                            data                Login link data
 131          * @var    \phpbb\auth\provider_interface    auth_provider        Auth provider
 132          * @var    string                            login_link_error    Login link error
 133          * @var    string                            login_error            Login error
 134          * @var    string                            login_username        Login username
 135          * @var    array                            tpl_ary                Template variables
 136          * @since 3.2.4-RC1
 137          */
 138          $vars = array('data', 'auth_provider', 'login_link_error', 'login_error', 'login_username', 'tpl_ary');
 139          extract($phpbb_dispatcher->trigger_event('core.ucp_login_link_template_after', compact($vars)));
 140  
 141          $template->assign_vars($tpl_ary);
 142  
 143          $this->tpl_name = 'ucp_login_link';
 144          $this->page_title = 'UCP_LOGIN_LINK';
 145      }
 146  
 147      /**
 148      * Builds the hidden fields string from the data array.
 149      *
 150      * @param    array    $data    This function only includes data in the array
 151      *                            that has a key that begins with 'login_link_'
 152      * @return    string    A string of hidden fields that can be included in the
 153      *                    template
 154      */
 155  	protected function get_hidden_fields($data)
 156      {
 157          $fields = array();
 158  
 159          foreach ($data as $key => $value)
 160          {
 161              $fields['login_link_' . $key] = $value;
 162          }
 163  
 164          return build_hidden_fields($fields);
 165      }
 166  
 167      /**
 168      * Builds the login_link data array
 169      *
 170      * @return    array    All login_link data. This is all GET data whose names
 171      *                    begin with 'login_link_'
 172      */
 173  	protected function get_login_link_data_array()
 174      {
 175          global $request;
 176  
 177          $var_names = $request->variable_names(\phpbb\request\request_interface::GET);
 178          $login_link_data = array();
 179          $string_start_length = strlen('login_link_');
 180  
 181          foreach ($var_names as $var_name)
 182          {
 183              if (strpos($var_name, 'login_link_') === 0)
 184              {
 185                  $key_name = substr($var_name, $string_start_length);
 186                  $login_link_data[$key_name] = $request->variable($var_name, '', false, \phpbb\request\request_interface::GET);
 187              }
 188          }
 189  
 190          return $login_link_data;
 191      }
 192  
 193      /**
 194      * Processes the result array from the login process
 195      * @param    array    $result    The login result array
 196      * @return    string|null    If there was an error in the process, a string is
 197      *                        returned. If the login was successful, then null is
 198      *                        returned.
 199      */
 200  	protected function process_login_result($result)
 201      {
 202          global $config, $template, $user, $phpbb_container;
 203  
 204          $login_error = null;
 205  
 206          if ($result['status'] != LOGIN_SUCCESS)
 207          {
 208              // Handle all errors first
 209              if ($result['status'] == LOGIN_BREAK)
 210              {
 211                  trigger_error($result['error_msg']);
 212              }
 213  
 214              switch ($result['status'])
 215              {
 216                  case LOGIN_ERROR_ATTEMPTS:
 217  
 218                      $captcha = $phpbb_container->get('captcha.factory')->get_instance($config['captcha_plugin']);
 219                      $captcha->init(CONFIRM_LOGIN);
 220  
 221                      $template->assign_vars(array(
 222                          'CAPTCHA_TEMPLATE'            => $captcha->get_template(),
 223                      ));
 224  
 225                      $login_error = $user->lang[$result['error_msg']];
 226                  break;
 227  
 228                  case LOGIN_ERROR_PASSWORD_CONVERT:
 229                      $login_error = sprintf(
 230                          $user->lang[$result['error_msg']],
 231                          ($config['email_enable']) ? '<a href="' . append_sid("{$phpbb_root_path}ucp.$phpEx", 'mode=sendpassword') . '">' : '',
 232                          ($config['email_enable']) ? '</a>' : '',
 233                          ($config['board_contact']) ? '<a href="mailto:' . htmlspecialchars($config['board_contact']) . '">' : '',
 234                          ($config['board_contact']) ? '</a>' : ''
 235                      );
 236                  break;
 237  
 238                  // Username, password, etc...
 239                  default:
 240                      $login_error = $user->lang[$result['error_msg']];
 241  
 242                      // Assign admin contact to some error messages
 243                      if ($result['error_msg'] == 'LOGIN_ERROR_USERNAME' || $result['error_msg'] == 'LOGIN_ERROR_PASSWORD')
 244                      {
 245                          $login_error = (!$config['board_contact']) ? sprintf($user->lang[$result['error_msg']], '', '') : sprintf($user->lang[$result['error_msg']], '<a href="mailto:' . htmlspecialchars($config['board_contact']) . '">', '</a>');
 246                      }
 247  
 248                  break;
 249              }
 250          }
 251  
 252          return $login_error;
 253      }
 254  
 255      /**
 256      * Performs a post login redirect
 257      */
 258  	protected function perform_redirect()
 259      {
 260          global $phpbb_root_path, $phpEx;
 261          $url = append_sid($phpbb_root_path . 'index.' . $phpEx);
 262          redirect($url);
 263      }
 264  }