Added GSSAPI support for issue #5779 - requires updated Net_Sieve class. See https://github.com/neilmunday/Net_Sieve/Sieve.php

plugins/managesieve/Changelog

@@ -1,3 +1,4 @@
+- Added GSSAPI support(#5779) - requires updated Net_Sieve class
 - Added option managesieve_default_headers
 - Added option managesieve_forward to enable settings dialog for simple forwarding (#6021)
 - Support filter action with custom IMAP flags (#6011)

plugins/managesieve/lib/Roundcube/rcube_sieve.php

@@ -59,10 +59,11 @@ class rcube_sieve
      * @param string  Proxy authentication identifier
      * @param string  Proxy authentication password
      * @param array   List of options to pass to stream_context_create().
+     * @param string  Kerberos service principal to use with GSSAPI authentication method
      */
     public function __construct($username, $password='', $host='localhost', $port=2000,
         $auth_type=null, $usetls=true, $disabled=array(), $debug=false,
-        $auth_cid=null, $auth_pw=null, $options=array())
+        $auth_cid=null, $auth_pw=null, $options=array(), $servicePrincipal=null)
     {
         $this->sieve = new Net_Sieve();
 
@@ -70,6 +71,10 @@ class rcube_sieve
             $this->sieve->setDebug(true, array($this, 'debug_handler'));
         }
 
+        if (isset($servicePrincipal)) {
+	    $this->sieve->setServicePrincipal($servicePrincipal);
+	}
+
         $result = $this->sieve->connect($host, $port, $options, $usetls);
 
         if (is_a($result, 'PEAR_Error')) {

plugins/managesieve/lib/Roundcube/rcube_sieve_engine.php

@@ -196,6 +196,7 @@ class rcube_sieve_engine
             'auth_cid'  => $this->rc->config->get('managesieve_auth_cid'),
             'auth_pw'   => $this->rc->config->get('managesieve_auth_pw'),
             'socket_options' => $this->rc->config->get('managesieve_conn_options'),
+            'service_principal' => $this->rc->config->get('krb_authentication_context')
         ));
 
         // Handle per-host socket options
@@ -213,7 +214,8 @@ class rcube_sieve_engine
             $plugin['debug'],
             $plugin['auth_cid'],
             $plugin['auth_pw'],
-            $plugin['socket_options']
+            $plugin['socket_options'],
+            $plugin['service_principal']
         );
 
         $error = $this->sieve->error();