diff --git a/appinfo/app.php b/appinfo/app.php
index b7ae102..f503578 100644
--- a/appinfo/app.php
+++ b/appinfo/app.php
@@ -2,3 +2,4 @@
 OC::$CLASSPATH['OC_User_IMAP']='user_external/lib/imap.php';
 OC::$CLASSPATH['OC_User_SMB']='user_external/lib/smb.php';
 OC::$CLASSPATH['OC_User_FTP']='user_external/lib/ftp.php';
+OC::$CLASSPATH['OC_User_BasicAuth']='user_external/lib/basicauth.php';
diff --git a/lib/basicauth.php b/lib/basicauth.php
new file mode 100644
index 0000000..d8f7acc
--- /dev/null
+++ b/lib/basicauth.php
@@ -0,0 +1,51 @@
+<?php
+/**
+ * Copyright (c) 2019 Lutz Freitag <lutz.freitag@gottliebtfreitag.de>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+class OC_User_BasicAuth extends \OCA\user_external\Base {
+
+	private $authUrl;
+
+	public function __construct($authUrl) {
+		parent::__construct($authUrl);
+		$this->authUrl =$authUrl;
+	}
+
+	/**
+	 * 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, $password) {
+		stream_context_set_default(array(
+		  'http'=>array(
+		    'method'=>"GET",
+		    'header' => "authorization: Basic " . base64_encode("$uid:$password")
+		  ))
+		);
+		$headers = get_headers($this->authUrl);
+
+		if($headers === false) {
+			OC::$server->getLogger()->error(
+				'ERROR: Not possible to connect to BasicAuth Url: "'.$this->authUrl.'"', 
+				['app' => 'user_external']
+			);
+			return false;
+		}
+
+		$returnCode= substr($headers[0], 9, 3);
+		if(substr($returnCode, 0, 1) === '2') {
+			$this->storeUser($uid);
+			return $uid;
+		} else {
+			return false;
+		}
+	}
+}