diff --git a/core/authorize.php b/core/authorize.php
index ecb7e22..638558e 100644
--- a/core/authorize.php
+++ b/core/authorize.php
@@ -100,8 +100,6 @@ function authorize_access_allowed() {
   // Load both the Form API and Batch API.
   require_once __DIR__ . '/includes/form.inc';
   require_once __DIR__ . '/includes/batch.inc';
-  // Load the code that drives the authorize process.
-  require_once __DIR__ . '/includes/authorize.inc';
 
   if (isset($_SESSION['authorize_operation']['page_title'])) {
     drupal_set_title($_SESSION['authorize_operation']['page_title']);
@@ -150,7 +148,7 @@ function authorize_access_allowed() {
     }
     elseif (!$batch = batch_get()) {
       // We have a batch to process, show the filetransfer form.
-      $elements = drupal_get_form('authorize_filetransfer_form');
+      $elements = \Drupal::formBuilder()->getForm('Drupal\Core\FileTransfer\Form\FileTransferAuthorizeForm');
       $output = drupal_render($elements);
     }
   }
diff --git a/core/includes/authorize.inc b/core/includes/authorize.inc
deleted file mode 100644
index 70fb4ca..0000000
--- a/core/includes/authorize.inc
+++ /dev/null
@@ -1,322 +0,0 @@
-<?php
-
-/**
- * @file
- * Helper functions and form handlers used for the authorize.php script.
- */
-
-/**
- * Form constructor for the file transfer authorization form.
- *
- * Allows the user to choose a FileTransfer type and supply credentials.
- *
- * @see authorize_filetransfer_form_validate()
- * @see authorize_filetransfer_form_submit()
- * @ingroup forms
- */
-function authorize_filetransfer_form($form, &$form_state) {
-  $form = array();
-
-  // If possible, we want to post this form securely via HTTPS.
-  $form['#https'] = TRUE;
-
-  // Get all the available ways to transfer files.
-  if (empty($_SESSION['authorize_filetransfer_info'])) {
-    drupal_set_message(t('Unable to continue, no available methods of file transfer'), 'error');
-    return array();
-  }
-  $available_backends = $_SESSION['authorize_filetransfer_info'];
-
-  if (!\Drupal::request()->isSecure()) {
-    $form['information']['https_warning'] = array(
-      '#prefix' => '<div class="messages messages--error">',
-      '#markup' => t('WARNING: You are not using an encrypted connection, so your password will be sent in plain text. <a href="@https-link">Learn more</a>.', array('@https-link' => 'http://drupal.org/https-information')),
-      '#suffix' => '</div>',
-    );
-  }
-
-  // Decide on a default backend.
-  if (isset($form_state['values']['connection_settings']['authorize_filetransfer_default'])) {
-    $authorize_filetransfer_default = $form_state['values']['connection_settings']['authorize_filetransfer_default'];
-  }
-  elseif ($authorize_filetransfer_default = \Drupal::config('system.authorize')->get('filetransfer_default'));
-  else {
-    $authorize_filetransfer_default = key($available_backends);
-  }
-
-  $form['information']['main_header'] = array(
-    '#prefix' => '<h3>',
-    '#markup' => t('To continue, provide your server connection details'),
-    '#suffix' => '</h3>',
-  );
-
-  $form['connection_settings']['#tree'] = TRUE;
-  $form['connection_settings']['authorize_filetransfer_default'] = array(
-    '#type' => 'select',
-    '#title' => t('Connection method'),
-    '#default_value' => $authorize_filetransfer_default,
-    '#weight' => -10,
-  );
-
-  /*
-   * Here we create two submit buttons. For a JS enabled client, they will
-   * only ever see submit_process. However, if a client doesn't have JS
-   * enabled, they will see submit_connection on the first form (when picking
-   * what filetransfer type to use, and submit_process on the second one (which
-   * leads to the actual operation).
-   */
-  $form['submit_connection'] = array(
-    '#prefix' => "<br style='clear:both'/>",
-    '#name' => 'enter_connection_settings',
-    '#type' => 'submit',
-    '#value' => t('Enter connection settings'),
-    '#weight' => 100,
-  );
-
-  $form['submit_process'] = array(
-    '#name' => 'process_updates',
-    '#type' => 'submit',
-    '#value' => t('Continue'),
-    '#weight' => 100,
-  );
-
-  // Build a container for each connection type.
-  foreach ($available_backends as $name => $backend) {
-    $form['connection_settings']['authorize_filetransfer_default']['#options'][$name] = $backend['title'];
-    $form['connection_settings'][$name] = array(
-      '#type' => 'container',
-      '#attributes' => array('class' => array("filetransfer-$name", 'filetransfer')),
-      '#states' => array(
-        'visible' => array(
-          'select[name="connection_settings[authorize_filetransfer_default]"]' => array('value' => $name),
-        ),
-      ),
-    );
-    // We can't use #prefix on the container itself since then the header won't
-    // be hidden and shown when the containers are being manipulated via JS.
-    $form['connection_settings'][$name]['header'] = array(
-      '#markup' => '<h4>' . t('@backend connection settings', array('@backend' => $backend['title'])) . '</h4>',
-    );
-
-    $form['connection_settings'][$name] += _authorize_filetransfer_connection_settings($name);
-
-    // Start non-JS code.
-    if (isset($form_state['values']['connection_settings']['authorize_filetransfer_default']) && $form_state['values']['connection_settings']['authorize_filetransfer_default'] == $name) {
-
-      // Change the submit button to the submit_process one.
-      $form['submit_process']['#attributes'] = array();
-      unset($form['submit_connection']);
-
-      // Activate the proper filetransfer settings form.
-      $form['connection_settings'][$name]['#attributes']['style'] = 'display:block';
-      // Disable the select box.
-      $form['connection_settings']['authorize_filetransfer_default']['#disabled'] = TRUE;
-
-      // Create a button for changing the type of connection.
-      $form['connection_settings']['change_connection_type'] = array(
-        '#name' => 'change_connection_type',
-        '#type' => 'submit',
-        '#value' => t('Change connection type'),
-        '#weight' => -5,
-        '#attributes' => array('class' => array('filetransfer-change-connection-type')),
-      );
-    }
-    // End non-JS code.
-  }
-  return $form;
-}
-
-/**
- * Generates the Form API array for a given connection backend's settings.
- *
- * @param $backend
- *   The name of the backend (e.g. 'ftp', 'ssh', etc).
- *
- * @return
- *   Form API array of connection settings for the given backend.
- *
- * @see hook_filetransfer_backends()
- */
-function _authorize_filetransfer_connection_settings($backend) {
-  $auth_connection_config = \Drupal::config('system.authorize')->get('filetransfer_connection_settings_' . $backend);
-  $defaults = $auth_connection_config ? $auth_connection_config : array();
-  $form = array();
-
-  // Create an instance of the file transfer class to get its settings form.
-  $filetransfer = authorize_get_filetransfer($backend);
-  if ($filetransfer) {
-    $form = $filetransfer->getSettingsForm();
-  }
-  // Fill in the defaults based on the saved settings, if any.
-  _authorize_filetransfer_connection_settings_set_defaults($form, NULL, $defaults);
-  return $form;
-}
-
-/**
- * Sets the default settings on a file transfer connection form recursively.
- *
- * The default settings for the file transfer connection forms are saved in
- * the database. The settings are stored as a nested array in the case of a
- * settings form that has details or otherwise uses a nested structure.
- * Therefore, to properly add defaults, we need to walk through all the
- * children form elements and process those defaults recursively.
- *
- * @param $element
- *   Reference to the Form API form element we're operating on.
- * @param $key
- *   The key for our current form element, if any.
- * @param array $defaults
- *   The default settings for the file transfer backend we're operating on.
- */
-function _authorize_filetransfer_connection_settings_set_defaults(&$element, $key, array $defaults) {
-  // If we're operating on a form element which isn't a details, and we have
-  // a default setting saved, stash it in #default_value.
-  if (!empty($key) && isset($defaults[$key]) && isset($element['#type']) && $element['#type'] != 'details') {
-    $element['#default_value'] = $defaults[$key];
-  }
-  // Now, we walk through all the child elements, and recursively invoke
-  // ourself on each one. Since the $defaults settings array can be nested
-  // (because of #tree, any values inside details will be nested), if
-  // there's a subarray of settings for the form key we're currently
-  // processing, pass in that subarray to the recursive call. Otherwise, just
-  // pass on the whole $defaults array.
-  foreach (element_children($element) as $child_key) {
-    _authorize_filetransfer_connection_settings_set_defaults($element[$child_key], $child_key, ((isset($defaults[$key]) && is_array($defaults[$key])) ? $defaults[$key] : $defaults));
-  }
-}
-
-/**
- * Form validation handler for authorize_filetransfer_form().
- *
- * @see authorize_filetransfer_form()
- * @see authorize_filetransfer_submit()
- */
-function authorize_filetransfer_form_validate($form, &$form_state) {
-  // Only validate the form if we have collected all of the user input and are
-  // ready to proceed with updating or installing.
-  if ($form_state['triggering_element']['#name'] != 'process_updates') {
-    return;
-  }
-
-  if (isset($form_state['values']['connection_settings'])) {
-    $backend = $form_state['values']['connection_settings']['authorize_filetransfer_default'];
-    $filetransfer = authorize_get_filetransfer($backend, $form_state['values']['connection_settings'][$backend]);
-    try {
-      if (!$filetransfer) {
-        throw new Exception(t('The connection protocol %backend does not exist.', array('%backend' => $backend)));
-      }
-      $filetransfer->connect();
-    }
-    catch (Exception $e) {
-      // The format of this error message is similar to that used on the
-      // database connection form in the installer.
-      form_set_error('connection_settings', $form_state, t('Failed to connect to the server. The server reports the following message: !message For more help installing or updating code on your server, see the <a href="@handbook_url">handbook</a>.', array(
-        '!message' => '<p class="error">' . $e->getMessage()  . '</p>',
-        '@handbook_url' => 'http://drupal.org/documentation/install/modules-themes',
-      )));
-    }
-  }
-}
-
-/**
- * Form submission handler for authorize_filetransfer_form().
- *
- * @see authorize_filetransfer_form()
- * @see authorize_filetransfer_validate()
- */
-function authorize_filetransfer_form_submit($form, &$form_state) {
-  switch ($form_state['triggering_element']['#name']) {
-    case 'process_updates':
-
-      // Save the connection settings to the DB.
-      $filetransfer_backend = $form_state['values']['connection_settings']['authorize_filetransfer_default'];
-
-      // If the database is available then try to save our settings. We have
-      // to make sure it is available since this code could potentially (will
-      // likely) be called during the installation process, before the
-      // database is set up.
-      try {
-        $connection_settings = array();
-        foreach ($form_state['values']['connection_settings'][$filetransfer_backend] as $key => $value) {
-          // We do *not* want to store passwords in the database, unless the
-          // backend explicitly says so via the magic #filetransfer_save form
-          // property. Otherwise, we store everything that's not explicitly
-          // marked with #filetransfer_save set to FALSE.
-          if (!isset($form['connection_settings'][$filetransfer_backend][$key]['#filetransfer_save'])) {
-            if ($form['connection_settings'][$filetransfer_backend][$key]['#type'] != 'password') {
-              $connection_settings[$key] = $value;
-            }
-          }
-          // The attribute is defined, so only save if set to TRUE.
-          elseif ($form['connection_settings'][$filetransfer_backend][$key]['#filetransfer_save']) {
-            $connection_settings[$key] = $value;
-          }
-        }
-        // Set this one as the default authorize method.
-        \Drupal::config('system.authorize')->set('filetransfer_default', $filetransfer_backend);
-        // Save the connection settings minus the password.
-        \Drupal::config('system.authorize')->set('filetransfer_connection_settings_' . $filetransfer_backend, $connection_settings);
-
-        $filetransfer = authorize_get_filetransfer($filetransfer_backend, $form_state['values']['connection_settings'][$filetransfer_backend]);
-
-        // Now run the operation.
-        authorize_run_operation($filetransfer);
-      }
-      catch (Exception $e) {
-        // If there is no database available, we don't care and just skip
-        // this part entirely.
-      }
-
-      break;
-
-    case 'enter_connection_settings':
-      $form_state['rebuild'] = TRUE;
-      break;
-
-    case 'change_connection_type':
-      $form_state['rebuild'] = TRUE;
-      unset($form_state['values']['connection_settings']['authorize_filetransfer_default']);
-      break;
-  }
-}
-
-/**
- * Runs the operation specified in $_SESSION['authorize_operation'].
- *
- * @param $filetransfer
- *   The FileTransfer object to use for running the operation.
- */
-function authorize_run_operation($filetransfer) {
-  $operation = $_SESSION['authorize_operation'];
-  unset($_SESSION['authorize_operation']);
-
-  if (!empty($operation['page_title'])) {
-    drupal_set_title($operation['page_title']);
-  }
-
-  require_once DRUPAL_ROOT . '/' . $operation['file'];
-  call_user_func_array($operation['callback'], array_merge(array($filetransfer), $operation['arguments']));
-}
-
-/**
- * Gets a FileTransfer class for a specific transfer method and settings.
- *
- * @param $backend
- *   The FileTransfer backend to get the class for.
- * @param $settings
- *   Array of settings for the FileTransfer.
- *
- * @return
- *   An instantiated FileTransfer object for the requested method and settings,
- *   or FALSE if there was an error finding or instantiating it.
- */
-function authorize_get_filetransfer($backend, $settings = array()) {
-  $filetransfer = FALSE;
-  if (!empty($_SESSION['authorize_filetransfer_info'][$backend])) {
-    $backend_info = $_SESSION['authorize_filetransfer_info'][$backend];
-    if (class_exists($backend_info['class'])) {
-      $filetransfer = $backend_info['class']::factory(DRUPAL_ROOT, $settings);
-    }
-  }
-  return $filetransfer;
-}
diff --git a/core/lib/Drupal/Core/FileTransfer/Form/FileTransferAuthorizeForm.php b/core/lib/Drupal/Core/FileTransfer/Form/FileTransferAuthorizeForm.php
new file mode 100644
index 0000000..061f169
--- /dev/null
+++ b/core/lib/Drupal/Core/FileTransfer/Form/FileTransferAuthorizeForm.php
@@ -0,0 +1,326 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\FileTransfer\Form\FileTransferAuthorizeForm.
+ */
+
+namespace Drupal\Core\FileTransfer\Form;
+
+use Drupal\Core\Form\FormBase;
+
+/**
+ * Provides the file transfer authorization form.
+ */
+class FileTransferAuthorizeForm extends FormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormID() {
+    return 'authorize_filetransfer_form';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, array &$form_state) {
+    // If possible, we want to post this form securely via HTTPS.
+    $form['#https'] = TRUE;
+
+    // Get all the available ways to transfer files.
+    if (empty($_SESSION['authorize_filetransfer_info'])) {
+      drupal_set_message($this->t('Unable to continue, no available methods of file transfer'), 'error');
+      return array();
+    }
+    $available_backends = $_SESSION['authorize_filetransfer_info'];
+
+    if (!$this->getRequest()->isSecure()) {
+      $form['information']['https_warning'] = array(
+        '#prefix' => '<div class="messages messages--error">',
+        '#markup' => $this->t('WARNING: You are not using an encrypted connection, so your password will be sent in plain text. <a href="@https-link">Learn more</a>.', array('@https-link' => 'http://drupal.org/https-information')),
+        '#suffix' => '</div>',
+      );
+    }
+
+    // Decide on a default backend.
+    if (isset($form_state['values']['connection_settings']['authorize_filetransfer_default'])) {
+      $authorize_filetransfer_default = $form_state['values']['connection_settings']['authorize_filetransfer_default'];
+    }
+    elseif ($authorize_filetransfer_default = $this->config('system.authorize')->get('filetransfer_default'));
+    else {
+      $authorize_filetransfer_default = key($available_backends);
+    }
+
+    $form['information']['main_header'] = array(
+      '#prefix' => '<h3>',
+      '#markup' => $this->t('To continue, provide your server connection details'),
+      '#suffix' => '</h3>',
+    );
+
+    $form['connection_settings']['#tree'] = TRUE;
+    $form['connection_settings']['authorize_filetransfer_default'] = array(
+      '#type' => 'select',
+      '#title' => $this->t('Connection method'),
+      '#default_value' => $authorize_filetransfer_default,
+      '#weight' => -10,
+    );
+
+    /*
+     * Here we create two submit buttons. For a JS enabled client, they will
+     * only ever see submit_process. However, if a client doesn't have JS
+     * enabled, they will see submit_connection on the first form (when picking
+     * what filetransfer type to use, and submit_process on the second one (which
+     * leads to the actual operation).
+     */
+    $form['submit_connection'] = array(
+      '#prefix' => "<br style='clear:both'/>",
+      '#name' => 'enter_connection_settings',
+      '#type' => 'submit',
+      '#value' => $this->t('Enter connection settings'),
+      '#weight' => 100,
+    );
+
+    $form['submit_process'] = array(
+      '#name' => 'process_updates',
+      '#type' => 'submit',
+      '#value' => $this->t('Continue'),
+      '#weight' => 100,
+    );
+
+    // Build a container for each connection type.
+    foreach ($available_backends as $name => $backend) {
+      $form['connection_settings']['authorize_filetransfer_default']['#options'][$name] = $backend['title'];
+      $form['connection_settings'][$name] = array(
+        '#type' => 'container',
+        '#attributes' => array('class' => array("filetransfer-$name", 'filetransfer')),
+        '#states' => array(
+          'visible' => array(
+            'select[name="connection_settings[authorize_filetransfer_default]"]' => array('value' => $name),
+          ),
+        ),
+      );
+      // We can't use #prefix on the container itself since then the header won't
+      // be hidden and shown when the containers are being manipulated via JS.
+      $form['connection_settings'][$name]['header'] = array(
+        '#markup' => '<h4>' . $this->t('@backend connection settings', array('@backend' => $backend['title'])) . '</h4>',
+      );
+
+      $form['connection_settings'][$name] += $this->addConnectionSettings($name);
+
+      // Start non-JS code.
+      if (isset($form_state['values']['connection_settings']['authorize_filetransfer_default']) && $form_state['values']['connection_settings']['authorize_filetransfer_default'] == $name) {
+
+        // Change the submit button to the submit_process one.
+        $form['submit_process']['#attributes'] = array();
+        unset($form['submit_connection']);
+
+        // Activate the proper filetransfer settings form.
+        $form['connection_settings'][$name]['#attributes']['style'] = 'display:block';
+        // Disable the select box.
+        $form['connection_settings']['authorize_filetransfer_default']['#disabled'] = TRUE;
+
+        // Create a button for changing the type of connection.
+        $form['connection_settings']['change_connection_type'] = array(
+          '#name' => 'change_connection_type',
+          '#type' => 'submit',
+          '#value' => $this->t('Change connection type'),
+          '#weight' => -5,
+          '#attributes' => array('class' => array('filetransfer-change-connection-type')),
+        );
+      }
+      // End non-JS code.
+    }
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateForm(array &$form, array &$form_state) {
+    // Only validate the form if we have collected all of the user input and are
+    // ready to proceed with updating or installing.
+    if ($form_state['triggering_element']['#name'] != 'process_updates') {
+      return;
+    }
+
+    if (isset($form_state['values']['connection_settings'])) {
+      $backend = $form_state['values']['connection_settings']['authorize_filetransfer_default'];
+      $filetransfer = $this->getFiletransfer($backend, $form_state['values']['connection_settings'][$backend]);
+      try {
+        if (!$filetransfer) {
+          throw new \Exception($this->t('The connection protocol %backend does not exist.', array('%backend' => $backend)));
+        }
+        $filetransfer->connect();
+      }
+      catch (\Exception $e) {
+        // The format of this error message is similar to that used on the
+        // database connection form in the installer.
+        $this->setFormError('connection_settings', $form_state, $this->t('Failed to connect to the server. The server reports the following message: !message For more help installing or updating code on your server, see the <a href="@handbook_url">handbook</a>.', array(
+          '!message' => '<p class="error">' . $e->getMessage()  . '</p>',
+          '@handbook_url' => 'http://drupal.org/documentation/install/modules-themes',
+        )));
+      }
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, array &$form_state) {
+    switch ($form_state['triggering_element']['#name']) {
+      case 'process_updates':
+
+        // Save the connection settings to the DB.
+        $filetransfer_backend = $form_state['values']['connection_settings']['authorize_filetransfer_default'];
+
+        // If the database is available then try to save our settings. We have
+        // to make sure it is available since this code could potentially (will
+        // likely) be called during the installation process, before the
+        // database is set up.
+        try {
+          $connection_settings = array();
+          foreach ($form_state['values']['connection_settings'][$filetransfer_backend] as $key => $value) {
+            // We do *not* want to store passwords in the database, unless the
+            // backend explicitly says so via the magic #filetransfer_save form
+            // property. Otherwise, we store everything that's not explicitly
+            // marked with #filetransfer_save set to FALSE.
+            if (!isset($form['connection_settings'][$filetransfer_backend][$key]['#filetransfer_save'])) {
+              if ($form['connection_settings'][$filetransfer_backend][$key]['#type'] != 'password') {
+                $connection_settings[$key] = $value;
+              }
+            }
+            // The attribute is defined, so only save if set to TRUE.
+            elseif ($form['connection_settings'][$filetransfer_backend][$key]['#filetransfer_save']) {
+              $connection_settings[$key] = $value;
+            }
+          }
+          // Set this one as the default authorize method.
+          $this->config('system.authorize')->set('filetransfer_default', $filetransfer_backend);
+          // Save the connection settings minus the password.
+          $this->config('system.authorize')->set('filetransfer_connection_settings_' . $filetransfer_backend, $connection_settings);
+
+          $filetransfer = $this->getFiletransfer($filetransfer_backend, $form_state['values']['connection_settings'][$filetransfer_backend]);
+
+          // Now run the operation.
+          $this->runOperation($filetransfer);
+        }
+        catch (\Exception $e) {
+          // If there is no database available, we don't care and just skip
+          // this part entirely.
+        }
+
+        break;
+
+      case 'enter_connection_settings':
+        $form_state['rebuild'] = TRUE;
+        break;
+
+      case 'change_connection_type':
+        $form_state['rebuild'] = TRUE;
+        unset($form_state['values']['connection_settings']['authorize_filetransfer_default']);
+        break;
+    }
+  }
+
+  /**
+   * Gets a FileTransfer class for a specific transfer method and settings.
+   *
+   * @param $backend
+   *   The FileTransfer backend to get the class for.
+   * @param $settings
+   *   Array of settings for the FileTransfer.
+   *
+   * @return \Drupal\Core\FileTransfer\FileTransfer|bool
+   *   An instantiated FileTransfer object for the requested method and settings,
+   *   or FALSE if there was an error finding or instantiating it.
+   */
+  protected function getFiletransfer($backend, $settings = array()) {
+    $filetransfer = FALSE;
+    if (!empty($_SESSION['authorize_filetransfer_info'][$backend])) {
+      $backend_info = $_SESSION['authorize_filetransfer_info'][$backend];
+      if (class_exists($backend_info['class'])) {
+        $filetransfer = $backend_info['class']::factory(DRUPAL_ROOT, $settings);
+      }
+    }
+    return $filetransfer;
+  }
+
+  /**
+   * Generates the Form API array for a given connection backend's settings.
+   *
+   * @param string $backend
+   *   The name of the backend (e.g. 'ftp', 'ssh', etc).
+   *
+   * @return array
+   *   Form API array of connection settings for the given backend.
+   *
+   * @see hook_filetransfer_backends()
+   */
+  protected function addConnectionSettings($backend) {
+    $auth_connection_config = $this->config('system.authorize')->get('filetransfer_connection_settings_' . $backend);
+    $defaults = $auth_connection_config ? $auth_connection_config : array();
+    $form = array();
+
+    // Create an instance of the file transfer class to get its settings form.
+    $filetransfer = $this->getFiletransfer($backend);
+    if ($filetransfer) {
+      $form = $filetransfer->getSettingsForm();
+    }
+    // Fill in the defaults based on the saved settings, if any.
+    $this->setConnectionSettingsDefaults($form, NULL, $defaults);
+    return $form;
+  }
+
+  /**
+   * Sets the default settings on a file transfer connection form recursively.
+   *
+   * The default settings for the file transfer connection forms are saved in
+   * the database. The settings are stored as a nested array in the case of a
+   * settings form that has details or otherwise uses a nested structure.
+   * Therefore, to properly add defaults, we need to walk through all the
+   * children form elements and process those defaults recursively.
+   *
+   * @param $element
+   *   Reference to the Form API form element we're operating on.
+   * @param $key
+   *   The key for our current form element, if any.
+   * @param array $defaults
+   *   The default settings for the file transfer backend we're operating on.
+   */
+  protected function setConnectionSettingsDefaults(&$element, $key, array $defaults) {
+    // If we're operating on a form element which isn't a details, and we have
+    // a default setting saved, stash it in #default_value.
+    if (!empty($key) && isset($defaults[$key]) && isset($element['#type']) && $element['#type'] != 'details') {
+      $element['#default_value'] = $defaults[$key];
+    }
+    // Now, we walk through all the child elements, and recursively invoke
+    // ourselves on each one. Since the $defaults settings array can be nested
+    // (because of #tree, any values inside details will be nested), if
+    // there's a subarray of settings for the form key we're currently
+    // processing, pass in that subarray to the recursive call. Otherwise, just
+    // pass on the whole $defaults array.
+    foreach (element_children($element) as $child_key) {
+      $this->setConnectionSettingsDefaults($element[$child_key], $child_key, ((isset($defaults[$key]) && is_array($defaults[$key])) ? $defaults[$key] : $defaults));
+    }
+  }
+
+  /**
+   * Runs the operation specified in $_SESSION['authorize_operation'].
+   *
+   * @param $filetransfer
+   *   The FileTransfer object to use for running the operation.
+   */
+  protected function runOperation($filetransfer) {
+    $operation = $_SESSION['authorize_operation'];
+    unset($_SESSION['authorize_operation']);
+
+    if (!empty($operation['page_title'])) {
+      drupal_set_title($operation['page_title']);
+    }
+
+    require_once DRUPAL_ROOT . '/' . $operation['file'];
+    call_user_func_array($operation['callback'], array_merge(array($filetransfer), $operation['arguments']));
+  }
+
+}