CheckAuthentication: Drupal Role access

Good news: there will be a separate CKFinder module for Drupal available (coming soon).

In the meantime quick hack for you:
Download the latest version of FCKeditor module (5.x-2.1-beta) and take a look at the attached filemanager.config.php.
There is a ready to use CheckAuthentication() function. You could port this function to CKFinder.

Once the Drupal environment is set up, the following line is crucial:

 $authenticated = user_access("allow fckeditor file uploads"); 

What you could do, is to add in fckeditor.module:

function fckeditor_perm() {
  return array('administer fckeditor', 'access fckeditor', 'allow fckeditor file uploads', 'ckfinder full', 'ckfinder browse');
}

so that you could assign the right permissions to the CKFinder (in admin/user/access, fckeditor section).

Here's the sample config.php I have used for CKFinder.

<?php
$fck_user_files_path = "";
$fck_user_files_absolute_path = "";
$ckfinder_browse = false;
$ckfinder_full = false;

function CheckAuthentication()
{
  static $authenticated;

  if (!isset($authenticated)) {
    $result = false;

    $drupal_path = "../../../";
    if(!file_exists($drupal_path . "/includes/bootstrap.inc")) {
      $drupal_path = "../..";
      do {
        $drupal_path .= "/..";
        $depth = substr_count($drupal_path, "..");
      }
      while(!($bootstrapFileFound = file_exists($drupal_path . "/includes/bootstrap.inc")) && $depth<10);
    }
    if (!isset($bootstrapFileFound) || $bootstrapFileFound) {
      $fck_cwd = getcwd();
      chdir($drupal_path);
      require_once "./includes/bootstrap.inc";
      drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
      $authenticated = user_access("allow fckeditor file uploads");
      if (user_access("ckfinder browse")) {
        $_SESSION['CKFinder_UserRole'] = "CKFinder_Browse";
      }
      if (user_access("ckfinder full")) {
        $_SESSION['CKFinder_UserRole'] = "CKFinder_Full";
      }
      if (isset($_SESSION['FCKeditor']['UserFilesPath'], $_SESSION['FCKeditor']['UserFilesAbsolutePath'])) {
        $GLOBALS['fck_user_files_path'] = $_SESSION['FCKeditor']['UserFilesPath'];
        $GLOBALS['fck_user_files_absolute_path'] = $_SESSION['FCKeditor']['UserFilesAbsolutePath'];
      }
      //print_r($_SESSION);
      chdir($fck_cwd);
    }
  }

  return $authenticated;
}

$Config['Enabled'] = CheckAuthentication();

if (!empty($fck_user_files_path)) {
  $baseUrl = $fck_user_files_path;
  $baseDir = $fck_user_files_absolute_path;
}
else {
  // Nothing in session? Shouldn't happen... anyway let's try to upload it in the (almost) right place
  // Path to user files relative to the document root.
  $baseUrl = strtr(base_path(), array(
  "/modules/fckeditor/fckeditor/editor/filemanager/connectors/php" => "",
  "/modules/fckeditor/fckeditor/editor/filemanager/browser/default/connectors/php" => "",
  "/modules/fckeditor/fckeditor/editor/filemanager/upload/php" => "",
  )) . file_directory_path() . "/";
  $baseDir = resolveUrl($baseUrl);
}

$config['LicenseName'] = '';
$config['LicenseKey'] = '';

$config['Thumbnails'] = Array(
        'url' => $baseUrl . '_thumbs',
        'directory' => $baseDir . '_thumbs',
        'enabled' => true,
        'maxWidth' => 100,
        'maxHeight' => 100,
        'quality' => 80);

$config['Images'] = Array(
        'maxWidth' => 1600,
        'maxHeight' => 1200,
        'quality' => 80);        
        
$config['RoleSessionVar'] = 'CKFinder_UserRole';

$config['AccessControl'][] = Array(
        'role' => '*',
        'resourceType' => '*',
        'folder' => '/',

        'folderView' => false,
        'folderCreate' => false,
        'folderRename' => false,
        'folderDelete' => false,

        'fileView' => false,
        'fileUpload' => false,
        'fileRename' => false,
        'fileDelete' => false);

$config['AccessControl'][] = Array(
        'role' => 'CKFinder_Browse',
        'resourceType' => '*',
        'folder' => '/',

        'folderView' => true,
        'folderCreate' => false,
        'folderRename' => false,
        'folderDelete' => false,

        'fileView' => true,
        'fileUpload' => false,
        'fileRename' => false,
        'fileDelete' => false);
        
$config['AccessControl'][] = Array(
        'role' => 'CKFinder_Full',
        'resourceType' => '*',
        'folder' => '/',

        'folderView' => true,
        'folderCreate' => true,
        'folderRename' => true,
        'folderDelete' => true,

        'fileView' => true,
        'fileUpload' => true,
        'fileRename' => true,
        'fileDelete' => true);
        
$config['DefaultResourceTypes'] = '';

$config['ResourceType'][] = Array(
        'name' => 'File',                // Single quotes not allowed
        'url' => $baseUrl . 'file',
        'directory' => $baseDir . 'file',
        'maxSize' => 0,
        'allowedExtensions' => '7z,aiff,asf,avi,bmp,csv,doc,fla,flv,gif,gz,gzip,jpeg,jpg,mid,mov,mp3,mp4,mpc,mpeg,mpg,ods,odt,pdf,png,ppt,pxd,qt,ram,rar,rm,rmi,rmvb,rtf,sdc,sitd,swf,sxc,sxw,tar,tgz,tif,tiff,txt,vsd,wav,wma,wmv,xls,zip',
        'deniedExtensions' => '');

$config['ResourceType'][] = Array(
        'name' => 'Image',
        'url' => $baseUrl . 'image',
        'directory' => $baseDir . 'image',
        'maxSize' => 0,
        'allowedExtensions' => 'bmp,gif,jpeg,jpg,png',
        'deniedExtensions' => '');

$config['ResourceType'][] = Array(
        'name' => 'Flash',
        'url' => $baseUrl . 'flash',
        'directory' => $baseDir . 'flash',
        'maxSize' => 0,
        'allowedExtensions' => 'swf,flv',
        'deniedExtensions' => '');

$config['CheckDoubleExtension'] = true;

$config['FilesystemEncoding'] = 'UTF-8';

$config['SecureImageUploads'] = true;

$config['HtmlExtensions'] = array('html', 'htm', 'xml', 'js'); 

Do you have an ETA for the CKFinder module?

thanks for the module. i'll try. find it for a long time! thanks again.