diff --git a/dav/friendica/dav_friendica_auth.inc.php b/dav/friendica/dav_friendica_auth.inc.php
index 31a88b688..9b42ab8a8 100644
--- a/dav/friendica/dav_friendica_auth.inc.php
+++ b/dav/friendica/dav_friendica_auth.inc.php
@@ -67,7 +67,7 @@ class Sabre_DAV_Auth_Backend_Std extends Sabre_DAV_Auth_Backend_AbstractBasic
 		}
 
 		// Authenticates the user
-		if (!$this->validateUserPass($userpass[0],$userpass[1])) {
+		if (!$this->validateUserPass($userpass[0], $userpass[1])) {
 			$auth->requireLogin();
 			throw new Sabre_DAV_Exception_NotAuthenticated('Username or password does not match');
 		}
@@ -80,13 +80,8 @@ class Sabre_DAV_Auth_Backend_Std extends Sabre_DAV_Auth_Backend_AbstractBasic
 	 * @param string $password
 	 * @return bool
 	 */
-	protected function validateUserPass($username, $password) {
-		$encrypted = hash('whirlpool',trim($password));
-		$r = q("SELECT COUNT(*) anz FROM `user` WHERE `nickname` = '%s' AND `password` = '%s' AND `blocked` = 0 AND `account_expired` = 0 AND `verified` = 1 LIMIT 1",
-			dbesc(trim($username)),
-			dbesc($encrypted)
-		);
-		return ($r[0]["anz"] == 1);
-    }
-    
+	protected function validateUserPass($username, $password)
+	{
+		return User::authenticate($username, $password);
+	}
 }
diff --git a/jappixmini/jappixmini.php b/jappixmini/jappixmini.php
index ba82a0762..faac6a815 100644
--- a/jappixmini/jappixmini.php
+++ b/jappixmini/jappixmini.php
@@ -429,11 +429,7 @@ function jappixmini_settings_post(App $a, &$b)
 		if ($encrypt) {
 			// check that Jabber password was encrypted with correct Friendica password
 			$friendica_password = trim($b['jappixmini-friendica-password']);
-			$encrypted = hash('whirlpool',$friendica_password);
-			$r = q("SELECT * FROM `user` WHERE `uid`=$uid AND `password`='%s'",
-				dbesc($encrypted)
-			);
-			if (!count($r)) {
+			if (!User::authenticate((int) $uid, $friendica_password)) {
 				info("Wrong friendica password!");
 				return;
 			}
diff --git a/windowsphonepush/windowsphonepush.php b/windowsphonepush/windowsphonepush.php
index ffebd410c..baa4c656e 100644
--- a/windowsphonepush/windowsphonepush.php
+++ b/windowsphonepush/windowsphonepush.php
@@ -455,19 +455,10 @@ function windowsphonepush_login(App $a)
 		die('This api requires login');
 	}
 
-	$user = $_SERVER['PHP_AUTH_USER'];
-	$encrypted = hash('whirlpool',trim($_SERVER['PHP_AUTH_PW']));
+	$user_id = User::authenticate($_SERVER['PHP_AUTH_USER'], trim($_SERVER['PHP_AUTH_PW']));
 
-	// check if user specified by app is available in the user table
-	$r = q("SELECT * FROM `user` WHERE ( `email` = '%s' OR `nickname` = '%s' )
-	    AND `password` = '%s' AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
-	    dbesc(trim($user)),
-	    dbesc(trim($user)),
-	    dbesc($encrypted)
-	);
-
-	if(count($r)){
-	    $record = $r[0];
+	if ($user_id) {
+		$record = dba::select('user', [], ['uid' => $user_id], ['limit' => 1]);
 	} else {
 		logger('API_login failure: ' . print_r($_SERVER, true), LOGGER_DEBUG);
 		header('WWW-Authenticate: Basic realm="Friendica"');