migration to nextcloud app v3.0.0

Signed-off-by: Biermair Martin <martin.biermair@wimbergerhaus.at>

lib/FTP.php

@@ -0,0 +1,67 @@
+<?php
+/**
+ * Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OCA\UserExternal;
+
+/**
+ * User authentication against a FTP/FTPS server
+ *
+ * @category Apps
+ * @package  UserExternal
+ * @author   Robin Appelman <icewind@owncloud.com>
+ * @license  http://www.gnu.org/licenses/agpl AGPL
+ * @link     http://github.com/owncloud/apps
+ */
+class FTP extends Base{
+	private $host;
+	private $secure;
+	private $protocol;
+
+	/**
+	 * Create new FTP authentication provider
+	 *
+	 * @param string  $host   Hostname or IP of FTP server
+	 * @param boolean $secure TRUE to enable SSL
+	 */
+	public function __construct($host,$secure=false) {
+		$this->host=$host;
+		$this->secure=$secure;
+		$this->protocol='ftp';
+		if($this->secure) {
+			$this->protocol.='s';
+		}
+		parent::__construct($this->protocol . '://' . $this->host);
+	}
+
+	/**
+	 * Check if the password is correct without logging in the user
+	 *
+	 * @param string $uid      The username
+	 * @param string $password The password
+	 *
+	 * @return true/false
+	 */
+	public function checkPassword($uid, $password) {
+		if (false === array_search($this->protocol, stream_get_wrappers())) {
+			\OC::$server->getLogger()->error(
+				'ERROR: Stream wrapper not available: ' . $this->protocol,
+				['app' => 'user_external']
+			);
+			return false;
+		}
+		// opendir handles the as %-encoded string, but this is not true for usernames and passwords, encode them before passing them
+		$url = sprintf('%s://%s:%s@%s/', $this->protocol, urlencode($uid), urlencode($password), $this->host);
+		$result=@opendir($url);
+		if(is_resource($result)) {
+			$this->storeUser($uid);
+			return $uid;
+		}else{
+			return false;
+		}
+	}
+}