Log also failed logins to userlogins log

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Log also failed logins to userlogins log
 - Add temp_dir_ttl configuration option (#1489304)
 - Allow setting INBOX as Sent folder (#1489219)
 - Fix replacement variables in user-specific base_dn in some LDAP requests (#1489279)

config/defaults.inc.php

@@ -63,7 +63,7 @@ $config['syslog_facility'] = LOG_USER;
 // Log sent messages to <log_dir>/sendmail or to syslog
 $config['smtp_log'] = true;
 
-// Log successful logins to <log_dir>/userlogins or to syslog
+// Log successful/failed logins to <log_dir>/userlogins or to syslog
 $config['log_logins'] = false;
 
 // Log session authentication errors to <log_dir>/session or to syslog

index.php

@@ -138,7 +138,7 @@ if ($RCMAIL->task == 'login' && $RCMAIL->action == 'login') {
   }
   else {
     if (!$auth['valid']) {
-      $error_code  = RCMAIL::ERROR_INVALID_REQUEST;
+      $error_code = RCMAIL::ERROR_INVALID_REQUEST;
     }
     else {
       $error_code = $auth['error'] ? $auth['error'] : $RCMAIL->login_error();
@@ -153,6 +153,9 @@ if ($RCMAIL->task == 'login' && $RCMAIL->action == 'login') {
 
     $error_message = $error_labels[$error_code] ? $error_labels[$error_code] : 'loginfailed';
 
+    // log failed login
+    $RCMAIL->log_login($auth['user'], true, $error_code);
+
     $OUTPUT->show_message($error_message, 'warning');
     $RCMAIL->plugins->exec_hook('login_failed', array(
       'code' => $error_code, 'host' => $auth['host'], 'user' => $auth['user']));

program/include/rcmail.php

@@ -954,22 +954,32 @@ class rcmail extends rcube
     /**
      * Write login data (name, ID, IP address) to the 'userlogins' log file.
      */
-    public function log_login()
+    public function log_login($user, $failed_login = false, $error_code = 0)
     {
         if (!$this->config->get('log_logins')) {
             return;
         }
 
-        $user_name = $this->get_user_name();
-        $user_id   = $this->get_user_id();
+        // failed login
+        if ($failed_login) {
+            $message = sprintf('Failed login for %s from %s in session %s (error: %d)',
+                $user, rcube_utils::remote_ip(), session_id(), $error_code);
+        }
+        // successful login
+        else {
+            $user_name = $this->get_user_name();
+            $user_id   = $this->get_user_id();
 
-        if (!$user_id) {
-            return;
+            if (!$user_id) {
+                return;
+            }
+
+            $message = sprintf('Successful login for %s (ID: %d) from %s in session %s',
+                    $user_name, $user_id, rcube_utils::remote_ip(), session_id());
         }
 
-        self::write_log('userlogins',
-            sprintf('Successful login for %s (ID: %d) from %s in session %s',
-                $user_name, $user_id, rcube_utils::remote_ip(), session_id()));
+        // log login
+        self::write_log('userlogins', $message);
     }