migration to nextcloud app v3.0.0

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

lib/SSH.php

@@ -0,0 +1,61 @@
+<?php
+/**
+ * Copyright (c) 2018 David Fullard <dave@theinternetmonkey.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 SSH server
+ *
+ * @category Apps
+ * @package  UserExternal
+ * @author   David Fullard <dave@theinternetmonkey.com>
+ * @license  http://www.gnu.org/licenses/agpl AGPL
+ * @link     http://github.com/owncloud/apps
+ */
+
+
+class SSH extends Base {
+	private $host;
+	private $port;
+
+	/**
+ 	* Create a new SSH authentication provider
+ 	*
+ 	* @param string $host Hostname or IP address of SSH servr
+ 	*/
+	public function __construct($host, $port = 22) {
+		parent::__construct($host);
+		$this->host = $host;
+		$this->port = $port;
+	}
+
+	/**
+	* Check if the password is correct without logging in
+	* Requires the php-ssh2 pecl extension
+	*
+	* @param string $uid      The username
+	* @param string $password The password
+	*
+	* @return true/false
+	*/
+	public function checkPassword($uid, $password) {
+		if (!extension_loaded('ssh2')) {
+			\OC::$server->getLogger()->error(
+				'ERROR: php-ssh2 PECL module missing',
+				['app' => 'user_external']
+			);
+			return false;
+		}
+		$connection = ssh2_connect($this->host, $this->port);
+		if (ssh2_auth_password($connection, $uid, $password)) {
+			$this->storeUser($uid);
+			return $uid;
+		} else {
+			return false;
+		}
+	}
+}