From 2965a981b7ec22866fbdf2d567d87e2d068d3617 Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <thomas@roundcube.net>
Date: Fri, 31 Jul 2015 16:04:08 -0400
Subject: [PATCH] Allow to search and import missing PGP pubkeys from keyservers using Publickey.js

---
 program/steps/mail/get.inc |  700 ++++++++++++++++++++++++++++++++--------------------------
 1 files changed, 384 insertions(+), 316 deletions(-)

diff --git a/program/steps/mail/get.inc b/program/steps/mail/get.inc
index 3727577..bef46cf 100644
--- a/program/steps/mail/get.inc
+++ b/program/steps/mail/get.inc
@@ -5,7 +5,7 @@
  | program/steps/mail/get.inc                                            |
  |                                                                       |
  | This file is part of the Roundcube Webmail client                     |
- | Copyright (C) 2005-2011, The Roundcube Dev Team                       |
+ | Copyright (C) 2005-2013, The Roundcube Dev Team                       |
  |                                                                       |
  | Licensed under the GNU General Public License version 3 or            |
  | any later version with exceptions for skins & plugins.                |
@@ -22,15 +22,17 @@
 
 // show loading page
 if (!empty($_GET['_preload'])) {
-  $url = preg_replace('/([&?]+)_preload=/', '\\1_mimewarning=1&_embed=', $_SERVER['REQUEST_URI']);
-  $message = rcube_label('loadingdata');
+    $_get = $_GET + array('_mimewarning' => 1, '_embed' => 1);
+    unset($_get['_preload']);
+    $url = $RCMAIL->url($_get);
+    $message = $RCMAIL->gettext('loadingdata');
 
-  header('Content-Type: text/html; charset=' . RCMAIL_CHARSET);
-  print "<html>\n<head>\n"
-        . '<meta http-equiv="refresh" content="0; url='.Q($url).'">' . "\n"
-        . '<meta http-equiv="content-type" content="text/html; charset='.RCMAIL_CHARSET.'">' . "\n"
+    header('Content-Type: text/html; charset=' . RCUBE_CHARSET);
+    print "<html>\n<head>\n"
+        . '<meta http-equiv="refresh" content="0; url='.rcube::Q($url).'">' . "\n"
+        . '<meta http-equiv="content-type" content="text/html; charset='.RCUBE_CHARSET.'">' . "\n"
         . "</head>\n<body>\n$message\n</body>\n</html>";
-  exit;
+    exit;
 }
 
 ob_end_clean();
@@ -38,339 +40,357 @@
 
 // similar code as in program/steps/mail/show.inc
 if (!empty($_GET['_uid'])) {
-  $RCMAIL->config->set('prefer_html', true);
-  $MESSAGE = new rcube_message(get_input_value('_uid', RCUBE_INPUT_GET));
+    $uid = rcube_utils::get_input_value('_uid', rcube_utils::INPUT_GET);
+    $RCMAIL->config->set('prefer_html', true);
+    $MESSAGE = new rcube_message($uid);
 }
 
 // check connection status
 check_storage_status();
 
+$part_id = rcube_utils::get_input_value('_part', rcube_utils::INPUT_GPC);
+
 // show part page
 if (!empty($_GET['_frame'])) {
-  if (($part_id = get_input_value('_part', RCUBE_INPUT_GPC)) && ($part = $MESSAGE->mime_parts[$part_id])) {
-    $OUTPUT->set_pagetitle(rcmail_attachment_name($part));
-  }
+    if ($part_id && ($part = $MESSAGE->mime_parts[$part_id])) {
+        $filename = rcmail_attachment_name($part);
+        $OUTPUT->set_pagetitle($filename);
+    }
 
-  $OUTPUT->send('messagepart');
-  exit;
+    // register UI objects
+    $OUTPUT->add_handlers(array(
+        'messagepartframe'    => 'rcmail_message_part_frame',
+        'messagepartcontrols' => 'rcmail_message_part_controls',
+    ));
+
+    $OUTPUT->set_env('mailbox', $RCMAIL->storage->get_folder());
+    $OUTPUT->set_env('uid', $uid);
+    $OUTPUT->set_env('part', $part_id);
+    $OUTPUT->set_env('filename', $filename);
+
+    $OUTPUT->send('messagepart');
+    exit;
 }
 
 // render thumbnail of an image attachment
 else if ($_GET['_thumb']) {
-  $pid = get_input_value('_part', RCUBE_INPUT_GET);
-  if ($part = $MESSAGE->mime_parts[$pid]) {
-    $thumbnail_size = $RCMAIL->config->get('image_thumbnail_size', 240);
-    $temp_dir       = $RCMAIL->config->get('temp_dir');
-    list(,$ext)     = explode('/', $part->mimetype);
-    $mimetype       = $part->mimetype;
-    $file_ident     = $MESSAGE->headers->messageID . ':' . $part->mime_id . ':' . $part->size . ':' . $part->mimetype;
-    $cache_basename = $temp_dir . '/' . md5($file_ident . ':' . $RCMAIL->user->ID . ':' . $thumbnail_size);
-    $cache_file     = $cache_basename . '.' . $ext;
+    $pid = rcube_utils::get_input_value('_part', rcube_utils::INPUT_GET);
+    if ($part = $MESSAGE->mime_parts[$pid]) {
+        $thumbnail_size = $RCMAIL->config->get('image_thumbnail_size', 240);
+        $temp_dir       = $RCMAIL->config->get('temp_dir');
+        $mimetype       = $part->mimetype;
+        $file_ident     = $MESSAGE->headers->messageID . ':' . $part->mime_id . ':' . $part->size . ':' . $part->mimetype;
+        $cache_basename = $temp_dir . '/' . md5($file_ident . ':' . $RCMAIL->user->ID . ':' . $thumbnail_size);
+        $cache_file     = $cache_basename . '.thumb';
 
-    // render thumbnail image if not done yet
-    if (!is_file($cache_file)) {
-      $fp = fopen(($orig_name = $cache_basename . '.orig.' . $ext), 'w');
-      $MESSAGE->get_part_content($part->mime_id, $fp);
-      fclose($fp);
+        // render thumbnail image if not done yet
+        if (!is_file($cache_file)) {
+            if ($fp = fopen(($orig_name = $cache_basename . '.tmp'), 'w')) {
+                $MESSAGE->get_part_body($part->mime_id, false, 0, $fp);
+                fclose($fp);
 
-      $image = new rcube_image($orig_name);
-      if ($imgtype = $image->resize($thumbnail_size, $cache_file, true)) {
-        $mimetype = 'image/' . $imgtype;
-        unlink($orig_name);
-      }
-      else {
-        rename($orig_name, $cache_file);
-      }
-    }
-
-    if (is_file($cache_file)) {
-      header('Content-Type: ' . $mimetype);
-      readfile($cache_file);
-    }
-  }
-
-  exit;
-}
-
-else if (strlen($pid = get_input_value('_part', RCUBE_INPUT_GET))) {
-
-  if ($part = $MESSAGE->mime_parts[$pid]) {
-    $mimetype = rcmail_fix_mimetype($part->mimetype);
-
-    // allow post-processing of the message body
-    $plugin = $RCMAIL->plugins->exec_hook('message_part_get',
-      array('uid' => $MESSAGE->uid, 'id' => $part->mime_id, 'mimetype' => $mimetype, 'part' => $part, 'download' => !empty($_GET['_download'])));
-
-    if ($plugin['abort'])
-      exit;
-
-    // overwrite modified vars from plugin
-    $mimetype   = $plugin['mimetype'];
-    $extensions = rcube_mime::get_mime_extensions($mimetype);
-
-    if ($plugin['body'])
-      $part->body = $plugin['body'];
-
-
-    // compare file mimetype with the stated content-type headers and file extension to avoid malicious operations
-    if (!empty($_REQUEST['_embed']) && empty($_REQUEST['_nocheck'])) {
-      $file_extension = strtolower(pathinfo($part->filename, PATHINFO_EXTENSION));
-
-      // 1. compare filename suffix with expected suffix derived from mimetype
-      $valid = $file_extension && in_array($file_extension, (array)$extensions) || !empty($_REQUEST['_mimeclass']);
-
-      // 2. detect the real mimetype of the attachment part and compare it with the stated mimetype and filename extension
-      if ($valid || !$file_extension || $mimetype == 'application/octet-stream' || $mimetype == 'text/plain') {
-        if ($part->body)  // part body is already loaded
-          $body = $part->body;
-        else if ($part->size && $part->size < 1024*1024)   // load the entire part if it's small enough
-          $body = $part->body = $MESSAGE->get_part_content($part->mime_id);
-        else  // fetch the first 2K of the message part
-          $body = $MESSAGE->get_part_content($part->mime_id, null, true, 2048);
-
-        // detect message part mimetype
-        $real_mimetype = rcube_mime::file_content_type($body, $part->filename, $mimetype, true, true);
-        list($real_ctype_primary, $real_ctype_secondary) = explode('/', $real_mimetype);
-
-        // accept text/plain with any extension
-        if ($real_mimetype == 'text/plain' && $real_mimetype == $mimetype)
-          $file_extension = 'txt';
-
-        // ignore differences in text/* mimetypes. Filetype detection isn't very reliable here
-        if ($real_ctype_primary == 'text' && strpos($mimetype, $real_ctype_primary) === 0)
-          $real_mimetype = $mimetype;
-
-        // get valid file extensions
-        $extensions = rcube_mime::get_mime_extensions($real_mimetype);
-        $valid_extension = (!$file_extension || in_array($file_extension, (array)$extensions));
-
-        // ignore filename extension if mimeclass matches (#1489029)
-        if (!empty($_REQUEST['_mimeclass']) && $real_ctype_primary == $_REQUEST['_mimeclass'])
-          $valid_extension = true;
-
-        // fix mimetype for images wrongly declared as octet-stream
-        if ($mimetype == 'application/octet-stream' && strpos($real_mimetype, 'image/') === 0 && $valid_extension)
-          $mimetype = $real_mimetype;
-
-        $valid = ($real_mimetype == $mimetype && $valid_extension);
-      }
-      else {
-        $real_mimetype = $mimetype;
-      }
-
-      // show warning if validity checks failed
-      if (!$valid) {
-        // send blocked.gif for expected images
-        if (empty($_REQUEST['_mimewarning']) && strpos($mimetype, 'image/') === 0) {
-          // Do not cache. Failure might be the result of a misconfiguration, thus real content should be returned once fixed. 
-          $OUTPUT->nocacheing_headers();
-          header("Content-Type: image/gif");
-          header("Content-Transfer-Encoding: binary");
-          readfile(INSTALL_PATH . 'program/resources/blocked.gif');
-        }
-        else {  // html warning with a button to load the file anyway
-          $OUTPUT = new rcmail_html_page();
-          $OUTPUT->write(html::tag('html', null, html::tag('body', 'embed',
-            html::div(array('class' => 'rcmail-inline-message rcmail-inline-warning'),
-              rcube_label(array(
-                'name' => 'attachmentvalidationerror',
-                'vars' => array(
-                  'expected' => $mimetype . ($file_extension ? "(.$file_extension)" : ''),
-                  'detected' => $real_mimetype . ($extensions[0] ? "(.$extensions[0])" : ''),
-                )
-              )) .
-              html::p(array('class' => 'rcmail-inline-buttons'),
-                html::tag('button',
-                  array('onclick' => "location.href='" . $RCMAIL->url(array_merge($_GET, array('_nocheck' => 1))) . "'"),
-                  rcube_label('showanyway')))
-              )
-          )));
-        }
-        exit;
-      }
-    }
-
-
-    // TIFF to JPEG conversion, if needed
-    $tiff_support = !empty($_SESSION['browser_caps']) && !empty($_SESSION['browser_caps']['tif']);
-    if (!empty($_REQUEST['_embed']) && !$tiff_support
-      && $RCMAIL->config->get('im_convert_path')
-      && rcmail_part_image_type($part) == 'image/tiff'
-    ) {
-      $tiff2jpeg = true;
-      $mimetype = 'image/jpeg';
-    }
-
-
-    $browser = $RCMAIL->output->browser;
-    list($ctype_primary, $ctype_secondary) = explode('/', $mimetype);
-
-    // send download headers
-    if ($plugin['download']) {
-      header("Content-Type: application/octet-stream");
-      if ($browser->ie)
-        header("Content-Type: application/force-download");
-    }
-    else if ($ctype_primary == 'text') {
-      header("Content-Type: text/$ctype_secondary; charset=" . ($part->charset ? $part->charset : RCMAIL_CHARSET));
-    }
-    else {
-      header("Content-Type: $mimetype");
-      header("Content-Transfer-Encoding: binary");
-    }
-
-
-    // deliver part content
-    if ($ctype_primary == 'text' && $ctype_secondary == 'html' && empty($plugin['download'])) {
-      // Check if we have enough memory to handle the message in it
-      // #1487424: we need up to 10x more memory than the body
-      if (!rcmail_mem_check($part->size * 10)) {
-        $out = '<body>' . rcube_label('messagetoobig'). ' '
-          . html::a('?_task=mail&_action=get&_download=1&_uid='.$MESSAGE->uid.'&_part='.$part->mime_id
-            .'&_mbox='. urlencode($RCMAIL->storage->get_folder()), rcube_label('download')) . '</body></html>';
-      }
-      else {
-        // get part body if not available
-        if (!$part->body)
-          $part->body = $MESSAGE->get_part_content($part->mime_id);
-
-        // show images?
-        rcmail_check_safe($MESSAGE);
-
-        // render HTML body
-        $out = rcmail_print_body($part, array('safe' => $MESSAGE->is_safe, 'inline_html' => false));
-
-        // insert remote objects warning into HTML body
-        if ($REMOTE_OBJECTS) {
-          $body_start = 0;
-          if ($body_pos = strpos($out, '<body')) {
-            $body_start = strpos($out, '>', $body_pos) + 1;
-          }
-          $out = substr($out, 0, $body_start) .
-            html::div(array('class' => 'rcmail-inline-message rcmail-inline-warning'),
-              Q(rcube_label('blockedimages')) . '&nbsp;' .
-              html::tag('button',
-                array('onclick' => "location.href='" . $RCMAIL->url(array_merge($_GET, array('_safe' => 1))) . "'"),
-                Q(rcube_label('showimages')))
-            ) .
-            substr($out, $body_start);
-        }
-      }
-
-      // check connection status
-      if ($part->size && empty($part->body)) {
-        check_storage_status();
-      }
-
-      $OUTPUT = new rcube_html_page();
-      $OUTPUT->write($out);
-    }
-    else {
-      // don't kill the connection if download takes more than 30 sec.
-      @set_time_limit(0);
-
-      $filename = rcmail_attachment_name($part);
-
-      if ($browser->ie && $browser->ver < 7)
-        $filename = rawurlencode(abbreviate_string($filename, 55));
-      else if ($browser->ie)
-        $filename = rawurlencode($filename);
-      else
-        $filename = addcslashes($filename, '"');
-
-      $disposition = !empty($plugin['download']) ? 'attachment' : 'inline';
-
-      // Workaround for nasty IE bug (#1488844)
-      // If Content-Disposition header contains string "attachment" e.g. in filename
-      // IE handles data as attachment not inline
-      if ($disposition == 'inline' && $browser->ie && $browser->ver < 9) {
-        $filename = str_ireplace('attachment', 'attach', $filename);
-      }
-
-      // add filename extension if missing
-      if (!pathinfo($filename, PATHINFO_EXTENSION) && ($extensions = rcube_mime::get_mime_extensions($mimetype))) {
-        $filename .= '.' . $extensions[0];
-      }
-
-      header("Content-Disposition: $disposition; filename=\"$filename\"");
-
-      // handle tiff to jpeg conversion
-      if (!empty($tiff2jpeg)) {
-        $temp_dir  = unslashify($RCMAIL->config->get('temp_dir'));
-        $file_path = tempnam($temp_dir, 'rcmAttmnt');
-
-        // write content to temp file
-        if ($part->body) {
-          $saved = file_put_contents($file_path, $part->body);
-        }
-        else if ($part->size) {
-          $fd = fopen($file_path, 'w');
-          $saved = $RCMAIL->storage->get_message_part($MESSAGE->uid, $part->mime_id, $part, false, $fd);
-          fclose($fd);
+                $image = new rcube_image($orig_name);
+                if ($imgtype = $image->resize($thumbnail_size, $cache_file, true)) {
+                    $mimetype = 'image/' . $imgtype;
+                    unlink($orig_name);
+                }
+                else {
+                    rename($orig_name, $cache_file);
+                }
+            }
         }
 
-        // convert image to jpeg and send it to the browser
-        if ($saved) {
-          $image = new rcube_image($file_path);
-          if ($image->convert(rcube_image::TYPE_JPG, $file_path)) {
-            header("Content-Length: " . filesize($file_path));
-            readfile($file_path);
-          }
-          unlink($file_path);
+        if (is_file($cache_file)) {
+            header('Content-Type: ' . $mimetype);
+            readfile($cache_file);
         }
-      }
-      // do content filtering to avoid XSS through fake images
-      else if (!empty($_REQUEST['_embed']) && $browser->ie && $browser->ver <= 8) {
-        if ($part->body) {
-          echo preg_match('/<(script|iframe|object)/i', $part->body) ? '' : $part->body;
-          $sent = true;
-        }
-        else if ($part->size) {
-          $stdout = fopen('php://output', 'w');
-          stream_filter_register('rcube_content', 'rcube_content_filter') or die('Failed to register content filter');
-          stream_filter_append($stdout, 'rcube_content');
-          $sent = $RCMAIL->storage->get_message_part($MESSAGE->uid, $part->mime_id, $part, false, $stdout);
-        }
-      }
-      // send part as-it-is
-      else {
-        if ($part->body) {
-          header("Content-Length: " . strlen($part->body));
-          echo $part->body;
-          $sent = true;
-        }
-        else if ($part->size) {
-          if ($size = (int)$part->d_parameters['size']) {
-            header("Content-Length: $size");
-          }
-
-          $sent = $RCMAIL->storage->get_message_part($MESSAGE->uid, $part->mime_id, $part, true);
-        }
-      }
-
-      // check connection status
-      if ($part->size && !$sent) {
-        check_storage_status();
-      }
     }
 
     exit;
-  }
 }
 
+else if (strlen($part_id)) {
+    if ($part = $MESSAGE->mime_parts[$part_id]) {
+        $mimetype = rcmail_fix_mimetype($part->mimetype);
+
+        // allow post-processing of the message body
+        $plugin = $RCMAIL->plugins->exec_hook('message_part_get', array(
+            'uid'      => $MESSAGE->uid,
+            'id'       => $part->mime_id,
+            'mimetype' => $mimetype,
+            'part'     => $part,
+            'download' => !empty($_GET['_download'])
+        ));
+
+        if ($plugin['abort']) {
+            exit;
+        }
+
+        // overwrite modified vars from plugin
+        $mimetype   = $plugin['mimetype'];
+        $extensions = rcube_mime::get_mime_extensions($mimetype);
+
+        if ($plugin['body']) {
+            $body = $plugin['body'];
+        }
+
+        // compare file mimetype with the stated content-type headers and file extension to avoid malicious operations
+        if (!empty($_REQUEST['_embed']) && empty($_REQUEST['_nocheck'])) {
+            $file_extension = strtolower(pathinfo($part->filename, PATHINFO_EXTENSION));
+
+            // 1. compare filename suffix with expected suffix derived from mimetype
+            $valid = $file_extension && in_array($file_extension, (array)$extensions) || empty($extensions) || !empty($_REQUEST['_mimeclass']);
+
+            // 2. detect the real mimetype of the attachment part and compare it with the stated mimetype and filename extension
+            if ($valid || !$file_extension || $mimetype == 'application/octet-stream' || stripos($mimetype, 'text/') === 0) {
+                $tmp_body = $body ?: $MESSAGE->get_part_body($part->mime_id, false, 2048);
+
+                // detect message part mimetype
+                $real_mimetype = rcube_mime::file_content_type($tmp_body, $part->filename, $mimetype, true, true);
+                list($real_ctype_primary, $real_ctype_secondary) = explode('/', $real_mimetype);
+
+                // accept text/plain with any extension
+                if ($real_mimetype == 'text/plain' && $real_mimetype == $mimetype) {
+                    $valid_extension = true;
+                }
+                // ignore differences in text/* mimetypes. Filetype detection isn't very reliable here
+                else if ($real_ctype_primary == 'text' && strpos($mimetype, $real_ctype_primary) === 0) {
+                    $real_mimetype   = $mimetype;
+                    $valid_extension = true;
+                }
+                // ignore filename extension if mimeclass matches (#1489029)
+                else if (!empty($_REQUEST['_mimeclass']) && $real_ctype_primary == $_REQUEST['_mimeclass']) {
+                    $valid_extension = true;
+                }
+                else {
+                    // get valid file extensions
+                    $extensions      = rcube_mime::get_mime_extensions($real_mimetype);
+                    $valid_extension = !$file_extension || empty($extensions) || in_array($file_extension, (array)$extensions);
+                }
+
+                // fix mimetype for images wrongly declared as octet-stream
+                if ($mimetype == 'application/octet-stream' && strpos($real_mimetype, 'image/') === 0 && $valid_extension) {
+                    $mimetype = $real_mimetype;
+                }
+
+                // "fix" real mimetype the same way the original is before comparison
+                $real_mimetype = rcmail_fix_mimetype($real_mimetype);
+
+                $valid = $real_mimetype == $mimetype && $valid_extension;
+            }
+            else {
+                $real_mimetype = $mimetype;
+            }
+
+            // show warning if validity checks failed
+            if (!$valid) {
+                // send blocked.gif for expected images
+                if (empty($_REQUEST['_mimewarning']) && strpos($mimetype, 'image/') === 0) {
+                    // Do not cache. Failure might be the result of a misconfiguration, thus real content should be returned once fixed. 
+                    $content = $RCMAIL->get_resource_content('blocked.gif');
+                    $OUTPUT->nocacheing_headers();
+                    header("Content-Type: image/gif");
+                    header("Content-Transfer-Encoding: binary");
+                    header("Content-Length: " . strlen($content));
+                    echo $content;
+                }
+                else {  // html warning with a button to load the file anyway
+                    $OUTPUT = new rcmail_html_page();
+                    $OUTPUT->write(html::tag('html', null, html::tag('body', 'embed',
+                        html::div(array('class' => 'rcmail-inline-message rcmail-inline-warning'),
+                            $RCMAIL->gettext(array(
+                                'name' => 'attachmentvalidationerror',
+                                'vars' => array(
+                                    'expected' => $mimetype . ($file_extension ? " (.$file_extension)" : ''),
+                                    'detected' => $real_mimetype . ($extensions[0] ? " (.$extensions[0])" : ''),
+                                )
+                            ))
+                            . html::p(array('class' => 'rcmail-inline-buttons'),
+                                html::tag('button', array(
+                                    'onclick' => "location.href='" . $RCMAIL->url(array_merge($_GET, array('_nocheck' => 1))) . "'"
+                                ),
+                                $RCMAIL->gettext('showanyway'))
+                            )
+                        ))));
+                }
+
+                exit;
+            }
+        }
+
+
+        // TIFF to JPEG conversion, if needed
+        $tiff_support = !empty($_SESSION['browser_caps']) && !empty($_SESSION['browser_caps']['tif']);
+        if (!empty($_REQUEST['_embed']) && !$tiff_support
+            && rcube_image::is_convertable('image/tiff')
+            && rcmail_part_image_type($part) == 'image/tiff'
+        ) {
+            $tiff2jpeg = true;
+            $mimetype  = 'image/jpeg';
+        }
+
+
+        $browser = $RCMAIL->output->browser;
+        list($ctype_primary, $ctype_secondary) = explode('/', $mimetype);
+
+        if (!$plugin['download'] && $ctype_primary == 'text') {
+            header("Content-Type: text/$ctype_secondary; charset=" . ($part->charset ? $part->charset : RCUBE_CHARSET));
+        }
+        else {
+            header("Content-Type: $mimetype");
+            header("Content-Transfer-Encoding: binary");
+        }
+
+        // deliver part content
+        if ($ctype_primary == 'text' && $ctype_secondary == 'html' && empty($plugin['download'])) {
+            // Check if we have enough memory to handle the message in it
+            // #1487424: we need up to 10x more memory than the body
+            if (!rcube_utils::mem_check($part->size * 10)) {
+                $out = '<body>' . $RCMAIL->gettext('messagetoobig'). ' '
+                    . html::a('?_task=mail&_action=get&_download=1&_uid='.$MESSAGE->uid.'&_part='.$part->mime_id
+                        .'&_mbox='. urlencode($MESSAGE->folder), $RCMAIL->gettext('download')) . '</body></html>';
+            }
+            else {
+                // get part body if not available
+                if (!isset($body)) {
+                    $body = $MESSAGE->get_part_body($part->mime_id, true);
+                }
+
+                // show images?
+                rcmail_check_safe($MESSAGE);
+
+                // render HTML body
+                $out = rcmail_print_body($body, $part, array('safe' => $MESSAGE->is_safe, 'inline_html' => false));
+
+                // insert remote objects warning into HTML body
+                if ($REMOTE_OBJECTS) {
+                    $body_start = 0;
+                    if ($body_pos = strpos($out, '<body')) {
+                        $body_start = strpos($out, '>', $body_pos) + 1;
+                    }
+
+                    $out = substr($out, 0, $body_start)
+                        . html::div(array('class' => 'rcmail-inline-message rcmail-inline-warning'),
+                            rcube::Q($RCMAIL->gettext('blockedimages')) . '&nbsp;' .
+                            html::tag('button',
+                                array('onclick' => "location.href='" . $RCMAIL->url(array_merge($_GET, array('_safe' => 1))) . "'"),
+                                rcube::Q($RCMAIL->gettext('showimages')))
+                        )
+                        . substr($out, $body_start);
+                }
+            }
+
+            // check connection status
+            if ($part->size && empty($body)) {
+                check_storage_status();
+            }
+
+            $OUTPUT = new rcmail_html_page();
+            $OUTPUT->write($out);
+        }
+        else {
+            // don't kill the connection if download takes more than 30 sec.
+            @set_time_limit(0);
+
+            $filename = rcmail_attachment_name($part);
+
+            if ($browser->ie)
+                $filename = rawurlencode($filename);
+            else
+                $filename = addcslashes($filename, '"');
+
+            $disposition = !empty($plugin['download']) ? 'attachment' : 'inline';
+
+            // Workaround for nasty IE bug (#1488844)
+            // If Content-Disposition header contains string "attachment" e.g. in filename
+            // IE handles data as attachment not inline
+            if ($disposition == 'inline' && $browser->ie && $browser->ver < 9) {
+                $filename = str_ireplace('attachment', 'attach', $filename);
+            }
+
+            // add filename extension if missing
+            if (!pathinfo($filename, PATHINFO_EXTENSION) && ($extensions = rcube_mime::get_mime_extensions($mimetype))) {
+                $filename .= '.' . $extensions[0];
+            }
+
+            header("Content-Disposition: $disposition; filename=\"$filename\"");
+
+            // handle tiff to jpeg conversion
+            if (!empty($tiff2jpeg)) {
+                $temp_dir  = unslashify($RCMAIL->config->get('temp_dir'));
+                $file_path = tempnam($temp_dir, 'rcmAttmnt');
+
+                // write content to temp file
+                if ($body) {
+                    $saved = file_put_contents($file_path, $body);
+                }
+                else if ($part->size) {
+                    $fd    = fopen($file_path, 'w');
+                    $saved = $MESSAGE->get_part_body($part->mime_id, false, 0, $fd);
+                    fclose($fd);
+                }
+
+                // convert image to jpeg and send it to the browser
+                if ($saved) {
+                    $image = new rcube_image($file_path);
+                    if ($image->convert(rcube_image::TYPE_JPG, $file_path)) {
+                        header("Content-Length: " . filesize($file_path));
+                        readfile($file_path);
+                    }
+                    unlink($file_path);
+                }
+            }
+            // do content filtering to avoid XSS through fake images
+            else if (!empty($_REQUEST['_embed']) && $browser->ie && $browser->ver <= 8) {
+                if ($body) {
+                    echo preg_match('/<(script|iframe|object)/i', $body) ? '' : $body;
+                    $sent = true;
+                }
+                else if ($part->size) {
+                    $stdout = fopen('php://output', 'w');
+                    stream_filter_register('rcube_content', 'rcube_content_filter') or die('Failed to register content filter');
+                    stream_filter_append($stdout, 'rcube_content');
+                    $sent = $MESSAGE->get_part_body($part->mime_id, true, 0, $stdout);
+                }
+            }
+            // send part as-it-is
+            else {
+                if ($body && empty($plugin['download'])) {
+                    header("Content-Length: " . strlen($body));
+                    echo $body;
+                    $sent = true;
+                }
+                else if ($part->size) {
+                    if ($size = (int)$part->d_parameters['size']) {
+                        header("Content-Length: $size");
+                    }
+
+                    $sent = $MESSAGE->get_part_body($part->mime_id, false, 0, -1);
+                }
+            }
+
+            // check connection status
+            if ($part->size && !$sent) {
+                check_storage_status();
+            }
+        }
+
+        exit;
+    }
+}
 // print message
 else {
-  // send correct headers for content type
-  header("Content-Type: text/html");
+    // send correct headers for content type
+    header("Content-Type: text/html");
 
-  $cont = "<html>\n<head><title></title>\n</head>\n<body>";
-  $cont .= rcmail_message_body(array());
-  $cont .= "\n</body>\n</html>";
+    $cont = "<html>\n<head><title></title>\n</head>\n<body>";
+    $cont .= rcmail_message_body(array());
+    $cont .= "\n</body>\n</html>";
 
-  $OUTPUT = new rcube_html_page();
-  $OUTPUT->write($cont);
+    $OUTPUT = new rcmail_html_page();
+    $OUTPUT->write($cont);
 
-  exit;
+    exit;
 }
 
 
@@ -378,7 +398,9 @@
 header('HTTP/1.1 404 Not Found');
 exit;
 
-
+/**
+ * Handles nicely storage connection errors
+ */
 function check_storage_status()
 {
     $error = rcmail::get_instance()->storage->get_error_code();
@@ -399,7 +421,7 @@
             header('Location: ' . $_SERVER['REQUEST_URI'] . '&_redirected=1');
         }
         else {
-            raise_error(array(
+            rcube::raise_error(array(
                 'code' => 500, 'type' => 'php',
                 'file' => __FILE__, 'line' => __LINE__,
                 'message' => 'Unable to get/display message part. IMAP connection error'),
@@ -410,3 +432,49 @@
         exit;
     }
 }
+
+/**
+ * Attachment properties table
+ */
+function rcmail_message_part_controls($attrib)
+{
+    global $MESSAGE, $RCMAIL;
+
+    $part = asciiwords(rcube_utils::get_input_value('_part', rcube_utils::INPUT_GPC));
+    if (!is_object($MESSAGE) || !is_array($MESSAGE->parts)
+        || !($_GET['_uid'] && $_GET['_part']) || !$MESSAGE->mime_parts[$part]
+    ) {
+        return '';
+    }
+
+    $part  = $MESSAGE->mime_parts[$part];
+    $table = new html_table(array('cols' => 2));
+
+    $table->add('title', rcube::Q($RCMAIL->gettext('namex')).':');
+    $table->add('header', rcube::Q(rcmail_attachment_name($part)));
+
+    $table->add('title', rcube::Q($RCMAIL->gettext('type')).':');
+    $table->add('header', rcube::Q($part->mimetype));
+
+    $table->add('title', rcube::Q($RCMAIL->gettext('size')).':');
+    $table->add('header', rcube::Q($RCMAIL->message_part_size($part)));
+
+    return $table->show($attrib);
+}
+
+/**
+ * Attachment preview frame
+ */
+function rcmail_message_part_frame($attrib)
+{
+    global $MESSAGE, $RCMAIL;
+
+    $part = $MESSAGE->mime_parts[asciiwords(rcube_utils::get_input_value('_part', rcube_utils::INPUT_GPC))];
+    $ctype_primary = strtolower($part->ctype_primary);
+
+    $attrib['src'] = './?' . str_replace('_frame=', ($ctype_primary=='text' ? '_embed=' : '_preload='), $_SERVER['QUERY_STRING']);
+
+    $RCMAIL->output->add_gui_object('messagepartframe', $attrib['id']);
+
+    return html::iframe($attrib);
+}

--
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