From bd0551b22076b82a6d49e9f7a2b2e0c90a1b2326 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Fri, 05 Feb 2016 07:25:27 -0500
Subject: [PATCH] Secure also downloads of addressbook exports, managesieve script exports and Enigma keys exports

---
 program/steps/mail/func.inc |  443 ++++++++++++++++++++++++++++++++++++------------------
 1 files changed, 295 insertions(+), 148 deletions(-)

diff --git a/program/steps/mail/func.inc b/program/steps/mail/func.inc
index c6c0b95..963e696 100644
--- a/program/steps/mail/func.inc
+++ b/program/steps/mail/func.inc
@@ -1,6 +1,6 @@
 <?php
 
-/*
+/**
  +-----------------------------------------------------------------------+
  | program/steps/mail/func.inc                                           |
  |                                                                       |
@@ -37,7 +37,7 @@
 }
 
 // remove mbox part from _uid
-if (($_uid  = rcube_utils::get_input_value('_uid', RCUBE_INPUT_GPC)) && !is_array($_uid) && preg_match('/^\d+-.+/', $_uid)) {
+if (($_uid  = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_GPC)) && !is_array($_uid) && preg_match('/^\d+-.+/', $_uid)) {
   list($_uid, $mbox) = explode('-', $_uid, 2);
   if (isset($_GET['_uid']))  $_GET['_uid']  = $_uid;
   if (isset($_POST['_uid'])) $_POST['_uid'] = $_uid;
@@ -64,21 +64,12 @@
     $mbox_name = $RCMAIL->storage->get_folder();
 
     if (empty($RCMAIL->action)) {
-        // initialize searching result if search_filter is used
-        if ($_SESSION['search_filter'] && $_SESSION['search_filter'] != 'ALL') {
-            $RCMAIL->storage->search($mbox_name, $_SESSION['search_filter'], RCUBE_CHARSET, rcmail_sort_column());
-
-            $search_request             = md5($mbox_name.$_SESSION['search_filter']);
-            $_SESSION['search']         = $RCMAIL->storage->get_search_set();
-            $_SESSION['search_request'] = $search_request;
-
-            $OUTPUT->set_env('search_request', $search_request);
-        }
-
         $OUTPUT->set_env('search_mods', rcmail_search_mods());
 
         if (!empty($_SESSION['search_scope']))
             $OUTPUT->set_env('search_scope', $_SESSION['search_scope']);
+
+        rcmail_list_pagetitle();
     }
 
     $threading = (bool) $RCMAIL->storage->get_threading();
@@ -87,11 +78,12 @@
     // set current mailbox and some other vars in client environment
     $OUTPUT->set_env('mailbox', $mbox_name);
     $OUTPUT->set_env('pagesize', $RCMAIL->storage->get_pagesize());
+    $OUTPUT->set_env('current_page', max(1, $_SESSION['page']));
     $OUTPUT->set_env('delimiter', $delimiter);
     $OUTPUT->set_env('threading', $threading);
     $OUTPUT->set_env('threads', $threading || $RCMAIL->storage->get_capability('THREAD'));
     $OUTPUT->set_env('reply_all_mode', (int) $RCMAIL->config->get('reply_all_mode'));
-    $OUTPUT->set_env('preview_pane_mark_read', $RCMAIL->config->get('preview_pane_mark_read', 0));
+    $OUTPUT->set_env('preview_pane_mark_read', (int) $RCMAIL->config->get('preview_pane_mark_read'));
 
     if ($RCMAIL->storage->get_capability('QUOTA')) {
         $OUTPUT->set_env('quota', true);
@@ -119,11 +111,6 @@
             'flagged', 'unflagged', 'unread', 'deleted', 'replied', 'forwarded',
             'priority', 'withattachment', 'fileuploaderror');
     }
-
-    $pagetitle = $RCMAIL->localize_foldername($mbox_name, true);
-    $pagetitle = str_replace($delimiter, " \xC2\xBB ", $pagetitle);
-
-    $OUTPUT->set_pagetitle($pagetitle);
 }
 
 // register UI objects
@@ -139,6 +126,7 @@
     'messagecontentframe' => 'rcmail_messagecontent_frame',
     'messageimportform'   => 'rcmail_message_import_form',
     'searchfilter'        => 'rcmail_search_filter',
+    'searchinterval'      => 'rcmail_search_interval',
     'searchform'          => array($OUTPUT, 'search_form'),
 ));
 
@@ -175,16 +163,23 @@
     if (!strlen($mbox = rcube_utils::get_input_value('_mbox', rcube_utils::INPUT_GPC, true))) {
         $mbox = strlen($_SESSION['mbox']) ? $_SESSION['mbox'] : 'INBOX';
     }
-    if (!($page = intval($_GET['_page']))) {
-        $page = $_SESSION['page'] ? $_SESSION['page'] : 1;
+
+    // we handle 'page' argument on 'list' and 'getunread' to prevent from
+    // race condition and unintentional page overwrite in session
+    if ($RCMAIL->action == 'list' || $RCMAIL->action == 'getunread') {
+        if (!($page = intval($_GET['_page']))) {
+            $page = $_SESSION['page'] ?: 1;
+        }
+
+        $_SESSION['page'] = $page;
     }
 
     $RCMAIL->storage->set_folder($_SESSION['mbox'] = $mbox);
-    $RCMAIL->storage->set_page($_SESSION['page'] = $page);
+    $RCMAIL->storage->set_page($_SESSION['page']);
 
     // set default sort col/order to session
     if (!isset($_SESSION['sort_col'])) {
-        $_SESSION['sort_col'] = $message_sort_col ? $message_sort_col : '';
+        $_SESSION['sort_col'] = $message_sort_col ?: '';
     }
     if (!isset($_SESSION['sort_order'])) {
         $_SESSION['sort_order'] = strtoupper($message_sort_order) == 'ASC' ? 'ASC' : 'DESC';
@@ -215,6 +210,26 @@
     $threading = isset($a_threading[$_SESSION['mbox']]) ? $a_threading[$_SESSION['mbox']] : $default_threading;
 
     $RCMAIL->storage->set_threading($threading);
+}
+
+/**
+ * Sets page title
+ */
+function rcmail_list_pagetitle()
+{
+    global $RCMAIL;
+
+    if ($RCMAIL->output->get_env('search_request')) {
+        $pagetitle = $RCMAIL->gettext('searchresult');
+    }
+    else {
+        $mbox_name = $RCMAIL->output->get_env('mailbox') ?: $RCMAIL->storage->get_folder();
+        $delimiter = $RCMAIL->storage->get_hierarchy_delimiter();
+        $pagetitle = $RCMAIL->localize_foldername($mbox_name, true);
+        $pagetitle = str_replace($delimiter, " \xC2\xBB ", $pagetitle);
+    }
+
+    $RCMAIL->output->set_pagetitle($pagetitle);
 }
 
 /**
@@ -250,7 +265,7 @@
     global $RCMAIL;
 
     $delim       = $RCMAIL->storage->get_hierarchy_delimiter();
-    $mbox        = $RCMAIL->storage->get_folder();
+    $mbox        = $RCMAIL->output->get_env('mailbox') ?: $RCMAIL->storage->get_folder();
     $sent_mbox   = $RCMAIL->config->get('sent_mbox');
     $drafts_mbox = $RCMAIL->config->get('drafts_mbox');
 
@@ -340,8 +355,6 @@
     if (!in_array('threads', $a_show_cols))
         array_unshift($a_show_cols, 'threads');
 
-    $_SESSION['skin_path'] = $RCMAIL->config->get('skin_path');
-
     // set client env
     $OUTPUT->add_gui_object('messagelist', $attrib['id']);
     $OUTPUT->set_env('autoexpand_threads', intval($RCMAIL->config->get('autoexpand_threads')));
@@ -384,15 +397,21 @@
         $head_replace = true;
     }
 
-    // add 'folder' column to list on multi-folder searches
-    $search_set = $RCMAIL->storage->get_search_set();
+    $delimiter   = $RCMAIL->storage->get_hierarchy_delimiter();
+    $search_set  = $RCMAIL->storage->get_search_set();
     $multifolder = $search_set && $search_set[1]->multi;
+
+    // add/remove 'folder' column to the list on multi-folder searches
     if ($multifolder && !in_array('folder', $a_show_cols)) {
         $a_show_cols[] = 'folder';
         $head_replace = true;
     }
+    else if (!$multifolder && ($found = array_search('folder', $a_show_cols)) !== false) {
+        unset($a_show_cols[$found]);
+        $head_replace = true;
+    }
 
-    $mbox = $RCMAIL->storage->get_folder();
+    $mbox = $RCMAIL->output->get_env('mailbox') ?: $RCMAIL->storage->get_folder();
 
     // make sure 'threads' and 'subject' columns are present
     if (!in_array('subject', $a_show_cols))
@@ -402,6 +421,7 @@
 
     // Make sure there are no duplicated columns (#1486999)
     $a_show_cols = array_unique($a_show_cols);
+    $_SESSION['list_attrib']['columns'] = $a_show_cols;
 
     // Plugins may set header's list_cols/list_flags and other rcube_message_header variables
     // and list columns
@@ -437,6 +457,8 @@
         }
     }
 
+    $sort_col = $_SESSION['sort_col'];
+
     // loop through message headers
     foreach ($a_headers as $header) {
         if (empty($header))
@@ -465,11 +487,19 @@
                 $cont = rcube::Q($cont);
             }
             else if ($col == 'size')
-                $cont = show_bytes($header->$col);
+                $cont = $RCMAIL->show_bytes($header->$col);
             else if ($col == 'date')
-                $cont = $RCMAIL->format_date($header->date);
-            else if ($col == 'folder')
-                $cont = rcube::Q(rcube_charset::convert($header->folder, 'UTF7-IMAP'));
+                $cont = $RCMAIL->format_date($sort_col == 'arrival' ? $header->internaldate : $header->date);
+            else if ($col == 'folder') {
+                if ($last_folder !== $header->folder) {
+                    $last_folder      = $header->folder;
+                    $last_folder_name = rcube_charset::convert($last_folder, 'UTF7-IMAP');
+                    $last_folder_name = $RCMAIL->localize_foldername($last_folder_name, true);
+                    $last_folder_name = str_replace($delimiter, " \xC2\xBB ", $last_folder_name);
+                }
+
+                $cont = rcube::Q($last_folder_name);
+            }
             else
                 $cont = rcube::Q($header->$col);
 
@@ -520,8 +550,6 @@
 {
     global $RCMAIL;
 
-    $skin_path = $_SESSION['skin_path'];
-
     // check to see if we have some settings for sorting
     $sort_col   = $_SESSION['sort_col'];
     $sort_order = $_SESSION['sort_order'];
@@ -543,7 +571,7 @@
         $onclick = 'return ' . rcmail_output::JS_OBJECT_NAME . ".command('menu-open', 'messagelistmenu', this, event)";
         $inner   = $RCMAIL->gettext('listoptions');
         if (is_string($attrib['optionsmenuicon']) && $attrib['optionsmenuicon'] != 'true') {
-            $inner = html::img(array('src' => $skin_path . $attrib['optionsmenuicon'], 'alt' => $RCMAIL->gettext('listoptions')));
+            $inner = html::img(array('src' => $RCMAIL->output->abs_url($attrib['optionsmenuicon'], true), 'alt' => $RCMAIL->gettext('listoptions')));
         }
         $list_menu = html::a(array(
             'href' => '#list-options',
@@ -566,8 +594,9 @@
     }
 
     foreach ($a_show_cols as $col) {
-        $label = '';
+        $label    = '';
         $sortable = false;
+        $rel_col  = $col == 'date' && $sort_col == 'arrival' ? 'arrival' : $col;
 
         // get column name
         switch ($col) {
@@ -585,11 +614,11 @@
             $col_name = $list_menu;
             break;
         case 'fromto':
-            $label = $RCMAIL->gettext($smart_col);
+            $label    = $RCMAIL->gettext($smart_col);
             $col_name = rcube::Q($label);
             break;
         default:
-            $label = $RCMAIL->gettext($col);
+            $label    = $RCMAIL->gettext($col);
             $col_name = rcube::Q($label);
         }
 
@@ -599,7 +628,7 @@
             $col_name = html::a(array(
                     'href'  => "./#sort",
                     'class' => 'sortcol',
-                    'rel'   => $col,
+                    'rel'   => $rel_col,
                     'title' => $RCMAIL->gettext('sortby')
                 ), $col_name);
         }
@@ -607,7 +636,7 @@
             $col_name = '<span class="' . $col .'">' . $col_name . '</span>';
         }
 
-        $sort_class = $col == $sort_col && !$disabled_order ? " sorted$sort_order" : '';
+        $sort_class = $rel_col == $sort_col && !$disabled_order ? " sorted$sort_order" : '';
         $class_name = $col.$sort_class;
 
         // put it all together
@@ -624,18 +653,10 @@
  */
 function rcmail_messagecontent_frame($attrib)
 {
-    global $OUTPUT, $RCMAIL;
+    global $OUTPUT;
 
     if (empty($attrib['id']))
         $attrib['id'] = 'rcmailcontentwindow';
-
-    $attrib['name'] = $attrib['id'];
-
-    if ($RCMAIL->config->get('preview_pane')) {
-        $OUTPUT->set_env('contentframe', $attrib['id']);
-    }
-
-    $OUTPUT->set_env('blankpage', $attrib['src'] ? $OUTPUT->abs_url($attrib['src']) : 'program/resources/blank.gif');
 
     return $OUTPUT->frame($attrib, true);
 }
@@ -696,7 +717,7 @@
 function rcmail_get_mailbox_name_text()
 {
     global $RCMAIL;
-    return $RCMAIL->localize_foldername($RCMAIL->storage->get_folder());
+    return $RCMAIL->localize_foldername($RCMAIL->output->get_env('mailbox') ?: $RCMAIL->storage->get_folder());
 }
 
 function rcmail_send_unread_count($mbox_name, $force=false, $count=null, $mark='')
@@ -756,7 +777,7 @@
             // get default addressbook, like in addcontact.inc
             $CONTACTS = $RCMAIL->get_address_book(-1, true);
 
-            if ($CONTACTS) {
+            if ($CONTACTS && $message->sender['mailto']) {
                 $result = $CONTACTS->search('email', $message->sender['mailto'], 1, false);
                 if ($result->count) {
                     $message->set_safe(true);
@@ -804,7 +825,7 @@
     $wash_opts = array(
         'show_washed'   => false,
         'allow_remote'  => $p['safe'],
-        'blocked_src'   => "./program/resources/blocked.gif",
+        'blocked_src'   => 'program/resources/blocked.gif',
         'charset'       => RCUBE_CHARSET,
         'cid_map'       => $cid_replaces,
         'html_elements' => array('body'),
@@ -849,17 +870,19 @@
  * Convert the given message part to proper HTML
  * which can be displayed the message view
  *
- * @param object rcube_message_part Message part
- * @param array  Display parameters array 
+ * @param string             Message part body
+ * @param rcube_message_part Message part
+ * @param array              Display parameters array
+ *
  * @return string Formatted HTML string
  */
-function rcmail_print_body($part, $p = array())
+function rcmail_print_body($body, $part, $p = array())
 {
     global $RCMAIL;
 
     // trigger plugin hook
     $data = $RCMAIL->plugins->exec_hook('message_part_before',
-        array('type' => $part->ctype_secondary, 'body' => $part->body, 'id' => $part->mime_id)
+        array('type' => $part->ctype_secondary, 'body' => $body, 'id' => $part->mime_id)
             + $p + array('safe' => false, 'plain' => false, 'inline_html' => true));
 
     // convert html to text/plain
@@ -868,8 +891,7 @@
             $data['body'] = rcube_enriched::to_html($data['body']);
         }
 
-        $txt  = new rcube_html2text($data['body'], false, true);
-        $body = $txt->get_text();
+        $body = $RCMAIL->html2text($data['body']);
         $part->ctype_secondary = 'plain';
     }
     // text/html
@@ -885,7 +907,7 @@
     }
     else {
         // assert plaintext
-        $body = $part->body;
+        $body = $data['body'];
         $part->ctype_secondary = $data['type'] = 'plain';
     }
 
@@ -914,7 +936,7 @@
  */
 function rcmail_plain_body($body, $flowed = false)
 {
-    $options   = array('flowed' => $flowed, 'wrap' => !$flowed);
+    $options   = array('flowed' => $flowed, 'wrap' => !$flowed, 'replacer' => 'rcmail_string_replacer');
     $text2html = new rcube_text2html($body, false, $options);
     $body      = $text2html->get_html();
 
@@ -932,6 +954,13 @@
         break;
 
     case 'style':
+        // Crazy big styles may freeze the browser (#1490539)
+        // remove content with more than 5k lines
+        if (substr_count($content, "\n") > 5000) {
+            $out = '';
+            break;
+        }
+
         // decode all escaped entities and reduce to ascii strings
         $stripped = preg_replace('/[^a-zA-Z\(:;]/', '', rcube_utils::xss_entity_decode($content));
 
@@ -960,10 +989,12 @@
     static $sa_attrib;
 
     // keep header table attrib
-    if (is_array($attrib) && !$sa_attrib && !$attrib['valueof'])
+    if (is_array($attrib) && !$sa_attrib && !$attrib['valueof']) {
         $sa_attrib = $attrib;
-    else if (!is_array($attrib) && is_array($sa_attrib))
+    }
+    else if (!is_array($attrib) && is_array($sa_attrib)) {
         $attrib = $sa_attrib;
+    }
 
     if (!isset($MESSAGE)) {
         return false;
@@ -1011,10 +1042,12 @@
         }
         else if ($hkey == 'priority') {
             if ($value) {
-                $header_value = html::span('prio' . $value, rcmail_localized_priority($value));
+                $header_value = html::span('prio' . $value, rcube::Q(rcmail_localized_priority($value)));
+                $ishtml       = true;
             }
-            else
+            else {
                 continue;
+            }
         }
         else if ($hkey == 'replyto') {
             if ($headers['replyto'] != $headers['from']) {
@@ -1022,8 +1055,9 @@
                     $attrib['addicon'], $headers['charset'], $header_title);
                 $ishtml = true;
             }
-            else
+            else {
                 continue;
+            }
         }
         else if ($hkey == 'mail-reply-to') {
             if ($headers['mail-replyto'] != $headers['reply-to']
@@ -1033,8 +1067,9 @@
                     $attrib['addicon'], $headers['charset'], $header_title);
                 $ishtml = true;
             }
-            else
+            else {
                 continue;
+            }
         }
         else if ($hkey == 'sender') {
             if ($headers['sender'] != $headers['from']) {
@@ -1042,8 +1077,9 @@
                     $attrib['addicon'], $headers['charset'], $header_title);
                 $ishtml = true;
             }
-            else
+            else {
                 continue;
+            }
         }
         else if ($hkey == 'mail-followup-to') {
             $header_value = rcmail_address_string($value, $attrib['max'], true,
@@ -1057,8 +1093,10 @@
         }
         else if ($hkey == 'subject' && empty($value))
             $header_value = $RCMAIL->gettext('nosubject');
-        else
+        else {
+            $value        = is_array($value) ? implode(' ', $value) : $value;
             $header_value = trim(rcube_mime::decode_header($value, $headers['charset']));
+        }
 
         $output_headers[$hkey] = array(
             'title' => $header_title,
@@ -1078,14 +1116,15 @@
 
     // single header value is requested
     if (!empty($attrib['valueof'])) {
-        return rcube::Q($plugin['output'][$attrib['valueof']]['value'], ($attrib['valueof'] == 'subject' ? 'strict' : 'show'));
+        $row = $plugin['output'][$attrib['valueof']];
+        return $row['html'] ? $row['value'] : rcube::Q($row['value']);
     }
 
     // compose html table
     $table = new html_table(array('cols' => 2));
 
     foreach ($plugin['output'] as $hkey => $row) {
-        $val = $row['html'] ? $row['value'] : rcube::Q($row['value'], ($hkey == 'subject' ? 'strict' : 'show'));
+        $val = $row['html'] ? $row['value'] : rcube::Q($row['value']);
 
         $table->add(array('class' => 'header-title'), rcube::Q($row['title']));
         $table->add(array('class' => 'header '.$hkey), $val);
@@ -1119,7 +1158,7 @@
 /**
  * return block to show full message headers
  */
-function rcmail_message_full_headers($attrib, $headers=NULL)
+function rcmail_message_full_headers($attrib)
 {
     global $OUTPUT, $RCMAIL;
 
@@ -1154,7 +1193,8 @@
         $attrib['id'] = 'rcmailMsgBody';
 
     $safe_mode = $MESSAGE->is_safe || intval($_GET['_safe']);
-    $out = '';
+    $out       = '';
+    $part_no   = 0;
 
     $header_attrib = array();
     foreach ($attrib as $attr => $value) {
@@ -1172,7 +1212,16 @@
                 // unsupported (e.g. encrypted)
                 if ($part->realtype) {
                     if ($part->realtype == 'multipart/encrypted' || $part->realtype == 'application/pkcs7-mime') {
-                        $out .= html::span('part-notice', $RCMAIL->gettext('encryptedmessage'));
+                        if (!empty($_SESSION['browser_caps']['pgpmime']) && ($pgp_mime_part = $MESSAGE->get_multipart_encrypted_part())) {
+                            $out .= html::span('part-notice', $RCMAIL->gettext('externalmessagedecryption'));
+                            $OUTPUT->set_env('pgp_mime_part', $pgp_mime_part->mime_id);
+                            $OUTPUT->set_env('pgp_mime_container', '#' . $attrib['id']);
+                            $OUTPUT->add_label('loadingdata');
+                        }
+
+                        if (!$MESSAGE->encrypted_part) {
+                            $out .= html::span('part-notice', $RCMAIL->gettext('encryptedmessage'));
+                        }
                     }
                     continue;
                 }
@@ -1185,42 +1234,33 @@
                 else if (!rcube_utils::mem_check($part->size * 10)) {
                     $out .= html::span('part-notice', $RCMAIL->gettext('messagetoobig'). ' '
                         . html::a('?_task=mail&_action=get&_download=1&_uid='.$MESSAGE->uid.'&_part='.$part->mime_id
-                            .'&_mbox='. urlencode($RCMAIL->storage->get_folder()), $RCMAIL->gettext('download')));
+                            .'&_mbox='. urlencode($MESSAGE->folder), $RCMAIL->gettext('download')));
                     continue;
                 }
 
-                if (empty($part->ctype_parameters) || empty($part->ctype_parameters['charset'])) {
-                    $part->ctype_parameters['charset'] = $MESSAGE->headers->charset;
-                }
-
-                // fetch part if not available
-                if (!isset($part->body)) {
-                    $part->body = $MESSAGE->get_part_content($part->mime_id);
-                }
-
-                // extract headers from message/rfc822 parts
-                if ($part->mimetype == 'message/rfc822') {
-                    $msgpart = rcube_mime::parse_message($part->body);
-                    if (!empty($msgpart->headers)) {
-                        $part = $msgpart;
-                        $out .= html::div('message-partheaders', rcmail_message_headers(sizeof($header_attrib) ? $header_attrib : null, $part->headers));
-                    }
-                }
+                // fetch part body
+                $body = $MESSAGE->get_part_body($part->mime_id, true);
 
                 // message is cached but not exists (#1485443), or other error
-                if ($part->body === false) {
+                if ($body === false) {
                     rcmail_message_error($MESSAGE->uid);
+                }
+
+                // check if the message body is PGP encrypted
+                if (strpos($body, '-----BEGIN PGP MESSAGE-----') !== false) {
+                    $OUTPUT->set_env('is_pgp_content', '#message-part' . ($part_no + 1));
                 }
 
                 $plugin = $RCMAIL->plugins->exec_hook('message_body_prefix',
                     array('part' => $part, 'prefix' => ''));
 
-                $body = rcmail_print_body($part, array('safe' => $safe_mode, 'plain' => !$RCMAIL->config->get('prefer_html')));
+                $body = rcmail_print_body($body, $part, array('safe' => $safe_mode, 'plain' => !$RCMAIL->config->get('prefer_html')));
 
                 if ($part->ctype_secondary == 'html') {
-                    $body     = rcmail_html4inline($body, $attrib['id'], 'rcmBody', $attrs, $safe_mode);
-                    $div_attr = array('class' => 'message-htmlpart');
-                    $style    = array();
+                    $container_id = 'message-htmlpart' . (++$part_no);
+                    $body         = rcmail_html4inline($body, $container_id, 'rcmBody', $attrs, $safe_mode);
+                    $div_attr     = array('class' => 'message-htmlpart', 'id' => $container_id);
+                    $style        = array();
 
                     if (!empty($attrs)) {
                         foreach ($attrs as $a_idx => $a_val)
@@ -1231,8 +1271,11 @@
 
                     $out .= html::div($div_attr, $plugin['prefix'] . $body);
                 }
-                else
-                    $out .= html::div('message-part', $plugin['prefix'] . $body);
+                else {
+                    $container_id = 'message-part' . (++$part_no);
+                    $div_attr     = array('class' => 'message-part', 'id' => $container_id);
+                    $out .= html::div($div_attr, $plugin['prefix'] . $body);
+                }
             }
         }
     }
@@ -1242,7 +1285,7 @@
         if (!rcube_utils::mem_check(strlen($MESSAGE->body) * 10)) {
             $out .= html::span('part-notice', $RCMAIL->gettext('messagetoobig'). ' '
                 . html::a('?_task=mail&_action=get&_download=1&_uid='.$MESSAGE->uid.'&_part=0'
-                    .'&_mbox='. urlencode($RCMAIL->storage->get_folder()), $RCMAIL->gettext('download')));
+                    .'&_mbox='. urlencode($MESSAGE->folder), $RCMAIL->gettext('download')));
         }
         else {
             $plugin = $RCMAIL->plugins->exec_hook('message_body_prefix',
@@ -1361,10 +1404,10 @@
 /**
  * modify a HTML message that it can be displayed inside a HTML page
  */
-function rcmail_html4inline($body, $container_id, $body_id='', &$attributes=null, $allow_remote=false)
+function rcmail_html4inline($body, $container_id, $body_class='', &$attributes=null, $allow_remote=false)
 {
     $last_style_pos = 0;
-    $cont_id        = $container_id.($body_id ? ' div.'.$body_id : '');
+    $cont_id        = $container_id . ($body_class ? ' div.'.$body_class : '');
 
     // find STYLE tags
     while (($pos = stripos($body, '<style', $last_style_pos)) && ($pos2 = stripos($body, '</style>', $pos))) {
@@ -1408,7 +1451,7 @@
             '<!--\\1-->',
             '&lt;?',
             '?&gt;',
-            '<div class="'.$body_id.'"\\1>',
+            '<div class="' . $body_class . '"\\1>',
             '</div>',
         ),
         $body);
@@ -1416,7 +1459,7 @@
     $attributes = array();
 
     // Handle body attributes that doesn't play nicely with div elements
-    $regexp = '/<div class="' . preg_quote($body_id, '/') . '"([^>]*)/';
+    $regexp = '/<div class="' . preg_quote($body_class, '/') . '"([^>]*)/';
     if (preg_match($regexp, $body, $m)) {
         $attrs = $m[0];
 
@@ -1453,7 +1496,7 @@
     // make sure there's 'rcmBody' div, we need it for proper css modification
     // its name is hardcoded in rcmail_message_body() also
     else {
-        $body = '<div class="' . $body_id . '">' . $body . '</div>';
+        $body = '<div class="' . $body_class . '">' . $body . '</div>';
     }
 
     return $body;
@@ -1590,7 +1633,7 @@
                     $content = rcube::Q($name ? sprintf('%s <%s>', $name, $mailto) : $mailto);
                 }
                 else {
-                    $content = rcube::Q($name ? $name : $mailto);
+                    $content = rcube::Q($name ?: $mailto);
                     $attrs['title'] = $mailto;
                 }
 
@@ -1598,7 +1641,7 @@
             }
             else {
                 $address = html::span(array('title' => $mailto, 'class' => "rcmContactAddress"),
-                    rcube::Q($name ? $name : $mailto));
+                    rcube::Q($name ?: $mailto));
             }
 
             if ($addicon && $_SESSION['writeable_abook']) {
@@ -1610,7 +1653,7 @@
                             rcmail_output::JS_OBJECT_NAME, rcube::JQ($string)),
                     ),
                     html::img(array(
-                        'src' => $RCMAIL->config->get('skin_path') . $addicon,
+                        'src' => $RCMAIL->output->abs_url($addicon, true),
                         'alt' => "Add contact",
                 )));
             }
@@ -1742,20 +1785,6 @@
 }
 
 /**
- * clear message composing settings
- */
-function rcmail_compose_cleanup($id)
-{
-    if (!isset($_SESSION['compose_data_'.$id])) {
-        return;
-    }
-
-    $rcmail = rcmail::get_instance();
-    $rcmail->plugins->exec_hook('attachments_cleanup', array('group' => $id));
-    $rcmail->session->remove('compose_data_'.$id);
-}
-
-/**
  * Send the MDN response
  *
  * @param mixed $message    Original message object (rcube_message) or UID
@@ -1798,6 +1827,7 @@
             'Message-ID' => $RCMAIL->gen_message_id(),
             'X-Sender'   => $identity['email'],
             'References' => trim($message->headers->references . ' ' . $message->headers->messageID),
+            'In-Reply-To' => $message->headers->messageID,
         );
 
         $report = "Final-Recipient: rfc822; {$identity['email']}\r\n"
@@ -1813,20 +1843,21 @@
             $report .= "Reporting-UA: $agent\r\n";
         }
 
+        $to   = rcube_mime::decode_mime_string($message->headers->to, $message->headers->charset);
+        $date = $RCMAIL->format_date($message->headers->date, $RCMAIL->config->get('date_long'));
         $body = $RCMAIL->gettext("yourmessage") . "\r\n\r\n" .
-            "\t" . $RCMAIL->gettext("to") . ': ' . rcube_mime::decode_mime_string($message->headers->to, $message->headers->charset) . "\r\n" .
-            "\t" . $RCMAIL->gettext("subject") . ': ' . $message->subject . "\r\n" .
-            "\t" . $RCMAIL->gettext("date") . ': ' . $RCMAIL->format_date($message->headers->date, $RCMAIL->config->get('date_long')) . "\r\n" .
+            "\t" . $RCMAIL->gettext("to") . ": {$to}\r\n" .
+            "\t" . $RCMAIL->gettext("subject") . ": {$message->subject}\r\n" .
+            "\t" . $RCMAIL->gettext("date") . ": {$date}\r\n" .
             "\r\n" . $RCMAIL->gettext("receiptnote");
 
-        $compose->headers($headers);
+        $compose->headers(array_filter($headers));
         $compose->setContentType('multipart/report', array('report-type'=> 'disposition-notification'));
         $compose->setTXTBody(rcube_mime::wordwrap($body, 75, "\r\n"));
         $compose->addAttachment($report, 'message/disposition-notification', 'MDNPart2.txt', false, '7bit', 'inline');
 
-        if ($RCMAIL->config->get('mdn_use_from')) {
-            $options['mdn_use_from'] = true;
-        }
+        // SMTP options
+        $options = array('mdn_use_from' => (bool) $RCMAIL->config->get('mdn_use_from'));
 
         $sent = $RCMAIL->deliver_message($compose, $identity['email'], $mailto, $smtp_error, $body_file, $options);
 
@@ -1950,9 +1981,16 @@
 // Fixes some content-type names
 function rcmail_fix_mimetype($name)
 {
+    $map = array(
+        'image/x-ms-bmp' => 'image/bmp', // #1490282
+    );
+
+    if ($alias = $map[strtolower($name)]) {
+        $name = $alias;
+    }
     // Some versions of Outlook create garbage Content-Type:
     // application/pdf.A520491B_3BF7_494D_8855_7FAC2C6C0608
-    if (preg_match('/^application\/pdf.+/', $name)) {
+    else if (preg_match('/^application\/pdf.+/', $name)) {
         $name = 'application/pdf';
     }
     // treat image/pjpeg (image/pjpg, image/jpg) as image/jpeg (#1489097)
@@ -2000,8 +2038,9 @@
 {
     global $RCMAIL;
 
-    if (!strlen($attrib['id']))
+    if (!strlen($attrib['id'])) {
         $attrib['id'] = 'rcmlistfilter';
+    }
 
     $attrib['onchange'] = rcmail_output::JS_OBJECT_NAME.'.filter_mailbox(this.value)';
 
@@ -2015,30 +2054,48 @@
         $attachment .= ' HEADER Content-Type ' . rcube_imap_generic::escape($type);
     }
 
-    $select_filter = new html_select($attrib);
-    $select_filter->add($RCMAIL->gettext('all'), 'ALL');
-    $select_filter->add($RCMAIL->gettext('unread'), 'UNSEEN');
-    $select_filter->add($RCMAIL->gettext('flagged'), 'FLAGGED');
-    $select_filter->add($RCMAIL->gettext('unanswered'), 'UNANSWERED');
+    $select = new html_select($attrib);
+    $select->add($RCMAIL->gettext('all'), 'ALL');
+    $select->add($RCMAIL->gettext('unread'), 'UNSEEN');
+    $select->add($RCMAIL->gettext('flagged'), 'FLAGGED');
+    $select->add($RCMAIL->gettext('unanswered'), 'UNANSWERED');
     if (!$RCMAIL->config->get('skip_deleted')) {
-        $select_filter->add($RCMAIL->gettext('deleted'), 'DELETED');
-        $select_filter->add($RCMAIL->gettext('undeleted'), 'UNDELETED');
+        $select->add($RCMAIL->gettext('deleted'), 'DELETED');
+        $select->add($RCMAIL->gettext('undeleted'), 'UNDELETED');
     }
-    $select_filter->add($RCMAIL->gettext('withattachment'), $attachment);
-    $select_filter->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('highest'), 'HEADER X-PRIORITY 1');
-    $select_filter->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('high'), 'HEADER X-PRIORITY 2');
-    $select_filter->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('normal'), 'NOT HEADER X-PRIORITY 1 NOT HEADER X-PRIORITY 2 NOT HEADER X-PRIORITY 4 NOT HEADER X-PRIORITY 5');
-    $select_filter->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('low'), 'HEADER X-PRIORITY 4');
-    $select_filter->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('lowest'), 'HEADER X-PRIORITY 5');
-
-    $out = $select_filter->show($_SESSION['search_filter']);
+    $select->add($RCMAIL->gettext('withattachment'), $attachment);
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('highest'), 'HEADER X-PRIORITY 1');
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('high'), 'HEADER X-PRIORITY 2');
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('normal'), 'NOT HEADER X-PRIORITY 1 NOT HEADER X-PRIORITY 2 NOT HEADER X-PRIORITY 4 NOT HEADER X-PRIORITY 5');
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('low'), 'HEADER X-PRIORITY 4');
+    $select->add($RCMAIL->gettext('priority').': '.$RCMAIL->gettext('lowest'), 'HEADER X-PRIORITY 5');
 
     $RCMAIL->output->add_gui_object('search_filter', $attrib['id']);
 
-    return $out;
+    return $select->show($_REQUEST['_search'] ? $_SESSION['search_filter'] : 'ALL');
 }
 
-function rcmail_message_error($uid=null)
+function rcmail_search_interval($attrib)
+{
+    global $RCMAIL;
+
+    if (!strlen($attrib['id'])) {
+        $attrib['id'] = 'rcmsearchinterval';
+    }
+
+    $select = new html_select($attrib);
+    $select->add('', '');
+
+    foreach (array('1W', '1M', '1Y', '-1W', '-1M', '-1Y') as $value) {
+        $select->add($RCMAIL->gettext('searchinterval' . $value), $value);
+    }
+
+    $RCMAIL->output->add_gui_object('search_interval', $attrib['id']);
+
+    return $select->show($_REQUEST['_search'] ? $_SESSION['search_interval'] : '');
+}
+
+function rcmail_message_error()
 {
     global $RCMAIL;
 
@@ -2151,3 +2208,93 @@
 
     return $jsresult;
 }
+
+function rcmail_save_attachment($message, $pid, $compose_id, $params = array())
+{
+    global $COMPOSE;
+
+    $rcmail  = rcmail::get_instance();
+    $storage = $rcmail->get_storage();
+
+    if ($pid) {
+        // attachment requested
+        $part     = $message->mime_parts[$pid];
+        $size     = $part->size;
+        $mimetype = $part->ctype_primary . '/' . $part->ctype_secondary;
+        $filename = $params['filename'] ?: rcmail_attachment_name($part);
+    }
+    else {
+        // the whole message requested
+        $size = $message->size;
+        $mimetype = 'message/rfc822';
+        $filename = $params['filename'] ?: 'message_rfc822.eml';
+    }
+
+    // don't load too big attachments into memory
+    if (!rcube_utils::mem_check($size)) {
+        $temp_dir = unslashify($rcmail->config->get('temp_dir'));
+        $path     = tempnam($temp_dir, 'rcmAttmnt');
+
+        if ($fp = fopen($path, 'w')) {
+            if ($pid) {
+                // part body
+                $message->get_part_body($pid, false, 0, $fp);
+            }
+            else {
+                // complete message
+                $storage->get_raw_body($message->uid, $fp);
+            }
+
+            fclose($fp);
+        }
+        else {
+            return false;
+        }
+    }
+    else if ($pid) {
+        // part body
+        $data = $message->get_part_body($pid);
+    }
+    else {
+        // complete message
+        $data = $storage->get_raw_body($message->uid);
+    }
+
+    $attachment = array(
+        'group'      => $compose_id,
+        'name'       => $filename,
+        'mimetype'   => $mimetype,
+        'content_id' => $part ? $part->content_id : null,
+        'data'       => $data,
+        'path'       => $path,
+        'size'       => $path ? filesize($path) : strlen($data),
+        'charset'    => $part ? $part->charset : null,
+    );
+
+    $attachment = $rcmail->plugins->exec_hook('attachment_save', $attachment);
+
+    if ($attachment['status']) {
+        unset($attachment['data'], $attachment['status'], $attachment['content_id'], $attachment['abort']);
+
+        // rcube_session::append() replaces current session data with the old values
+        // (in rcube_session::reload()). This is a problem in 'compose' action, because before
+        // the first append() use we set some important data in the session.
+        // It also overwrites attachments list. Fixing reload() is not so simple if possible
+        // as we don't really know what has been added and what removed in meantime.
+        // So, for now we'll do not use append() on 'compose' action (#1490608).
+
+        if ($rcmail->action == 'compose') {
+            $COMPOSE['attachments'][$attachment['id']] = $attachment;
+        }
+        else {
+            $rcmail->session->append('compose_data_' . $compose_id . '.attachments', $attachment['id'], $attachment);
+        }
+
+        return $attachment;
+    }
+    else if ($path) {
+        @unlink($path);
+    }
+
+    return false;
+}

--
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