--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/password/drivers/pam.php	Thu Jan 04 15:50:29 2018 -0500
@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * PAM Password Driver
+ *
+ * @version 2.0
+ * @author Aleksander Machniak
+ *
+ * Copyright (C) 2005-2013, The Roundcube Dev Team
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ */
+
+class rcube_pam_password
+{
+    function save($currpass, $newpass)
+    {
+        $user  = $_SESSION['username'];
+        $error = '';
+
+        if (extension_loaded('pam') || extension_loaded('pam_auth')) {
+            if (pam_auth($user, $currpass, $error, false)) {
+                if (pam_chpass($user, $currpass, $newpass)) {
+                    return PASSWORD_SUCCESS;
+                }
+            }
+            else {
+                rcube::raise_error(array(
+                    'code' => 600,
+                    'type' => 'php',
+                    'file' => __FILE__, 'line' => __LINE__,
+                    'message' => "Password plugin: PAM authentication failed for user $user: $error"
+                    ), true, false);
+            }
+        }
+        else {
+            rcube::raise_error(array(
+                'code' => 600,
+                'type' => 'php',
+                'file' => __FILE__, 'line' => __LINE__,
+                'message' => "Password plugin: PECL-PAM module not loaded"
+                ), true, false);
+        }
+
+        return PASSWORD_ERROR;
+    }
+}