From 2b017e7f79be26563ab767bb9e97fee5d88a01f4 Mon Sep 17 00:00:00 2001
From: thomascube <thomas@roundcube.net>
Date: Fri, 09 Dec 2011 16:13:54 -0500
Subject: [PATCH] Allow clean background:url(...) styles in safe mode. This will make Roundcube pass the Email Standards Acid Test
---
program/include/main.inc | 126 +++++++++++++++++++++++++++++-------------
1 files changed, 87 insertions(+), 39 deletions(-)
diff --git a/program/include/main.inc b/program/include/main.inc
index 83b3087..2d18567 100644
--- a/program/include/main.inc
+++ b/program/include/main.inc
@@ -640,20 +640,23 @@
function get_input_value($fname, $source, $allow_html=FALSE, $charset=NULL)
{
$value = NULL;
-
- if ($source==RCUBE_INPUT_GET && isset($_GET[$fname]))
- $value = $_GET[$fname];
- else if ($source==RCUBE_INPUT_POST && isset($_POST[$fname]))
- $value = $_POST[$fname];
- else if ($source==RCUBE_INPUT_GPC)
- {
+
+ if ($source == RCUBE_INPUT_GET) {
+ if (isset($_GET[$fname]))
+ $value = $_GET[$fname];
+ }
+ else if ($source == RCUBE_INPUT_POST) {
+ if (isset($_POST[$fname]))
+ $value = $_POST[$fname];
+ }
+ else if ($source == RCUBE_INPUT_GPC) {
if (isset($_POST[$fname]))
$value = $_POST[$fname];
else if (isset($_GET[$fname]))
$value = $_GET[$fname];
else if (isset($_COOKIE[$fname]))
$value = $_COOKIE[$fname];
- }
+ }
return parse_input_value($value, $allow_html, $charset);
}
@@ -661,7 +664,7 @@
/**
* Parse/validate input value. See get_input_value()
* Performs stripslashes() and charset conversion if necessary
- *
+ *
* @param string Input value
* @param boolean Allow HTML tags in field value
* @param string Charset to convert into
@@ -687,15 +690,21 @@
else if (get_magic_quotes_gpc() || get_magic_quotes_runtime())
$value = stripslashes($value);
- // remove HTML tags if not allowed
+ // remove HTML tags if not allowed
if (!$allow_html)
$value = strip_tags($value);
-
+
+ $output_charset = is_object($OUTPUT) ? $OUTPUT->get_charset() : null;
+
+ // remove invalid characters (#1488124)
+ if ($output_charset == 'UTF-8')
+ $value = rc_utf8_clean($value);
+
// convert to internal charset
- if (is_object($OUTPUT) && $charset)
- return rcube_charset_convert($value, $OUTPUT->get_charset(), $charset);
- else
- return $value;
+ if ($charset && $output_charset)
+ $value = rcube_charset_convert($value, $output_charset, $charset);
+
+ return $value;
}
/**
@@ -711,10 +720,10 @@
$src = $mode == RCUBE_INPUT_GET ? $_GET : ($mode == RCUBE_INPUT_POST ? $_POST : $_REQUEST);
foreach ($src as $key => $value) {
$fname = $key[0] == '_' ? substr($key, 1) : $key;
- if ($ignore && !preg_match("/($ignore)/", $fname))
+ if ($ignore && !preg_match('/^(' . $ignore . ')$/', $fname))
$out[$fname] = get_input_value($key, $mode);
}
-
+
return $out;
}
@@ -730,12 +739,14 @@
/**
* Convert the given string into a valid HTML identifier
- * Same functionality as done in app.js with this.identifier_expr
- *
+ * Same functionality as done in app.js with rcube_webmail.html_identifier()
*/
-function html_identifier($str)
+function html_identifier($str, $encode=false)
{
- return asciiwords($str, true, '_');
+ if ($encode)
+ return rtrim(strtr(base64_encode($str), '+/', '-_'), '=');
+ else
+ return asciiwords($str, true, '_');
}
/**
@@ -872,18 +883,18 @@
* @param string Container ID to use as prefix
* @return string Modified CSS source
*/
-function rcmail_mod_css_styles($source, $container_id)
+function rcmail_mod_css_styles($source, $container_id, $allow_remote=false)
{
$last_pos = 0;
$replacements = new rcube_string_replacer;
// ignore the whole block if evil styles are detected
- $stripped = preg_replace('/[^a-z\(:;]/', '', rcmail_xss_entity_decode($source));
- if (preg_match('/expression|behavior|url\(|import[^a]/', $stripped))
+ $source = rcmail_xss_entity_decode($source);
+ $stripped = preg_replace('/[^a-z\(:;]/i', '', $source);
+ $evilexpr = 'expression|behavior' . (!$allow_remote ? '|url\(|import[^a]' : '');
+ if (preg_match("/$evilexpr/i", $stripped) // don't accept No-Gos
+ || (strpos($stripped, 'url(') && !preg_match('!url\s*\([ "\'](https?:)//[a-z0-9/._+-]+["\' ]\)!Ui', $source))) // only allow clean urls
return '/* evil! */';
-
- // remove css comments (sometimes used for some ugly hacks)
- $source = preg_replace('!/\*(.+)\*/!Ums', '', $source);
// cut out all contents between { and }
while (($pos = strpos($source, '{', $last_pos)) && ($pos2 = strpos($source, '}', $pos)))
@@ -926,7 +937,7 @@
{
$out = html_entity_decode(html_entity_decode($content));
$out = preg_replace_callback('/\\\([0-9a-f]{4})/i', 'rcmail_xss_entity_decode_callback', $out);
- $out = preg_replace('#/\*.*\*/#Um', '', $out);
+ $out = preg_replace('#/\*.*\*/#Ums', '', $out);
return $out;
}
@@ -1281,11 +1292,6 @@
$path .= $prefix.$currentFolder;
if (!isset($arrFolders[$currentFolder])) {
- // Check \Noselect attribute (if attributes are in cache)
- if (!$virtual && ($attrs = $RCMAIL->imap->mailbox_attributes($path))) {
- $virtual = in_array('\\Noselect', $attrs);
- }
-
$arrFolders[$currentFolder] = array(
'id' => $path,
'name' => rcube_charset_convert($currentFolder, 'UTF7-IMAP'),
@@ -1336,7 +1342,7 @@
}
// make folder name safe for ids and class names
- $folder_id = html_identifier($folder['id']);
+ $folder_id = html_identifier($folder['id'], true);
$classes = array('mailbox');
// set special class for Sent, Drafts, Trash and Junk
@@ -1594,7 +1600,7 @@
*/
function rcube_html_editor($mode='')
{
- global $RCMAIL, $CONFIG;
+ global $RCMAIL;
$hook = $RCMAIL->plugins->exec_hook('html_editor', array('mode' => $mode));
@@ -1603,8 +1609,11 @@
$lang = strtolower($_SESSION['language']);
- // TinyMCE uses 'tw' for zh_TW (which is wrong, because tw is a code of Twi language)
- $lang = ($lang == 'zh_tw') ? 'tw' : substr($lang, 0, 2);
+ // TinyMCE uses two-letter lang codes, with exception of Chinese
+ if (strpos($lang, 'zh_') === 0)
+ $lang = str_replace('_', '-', $lang);
+ else
+ $lang = substr($lang, 0, 2);
if (!file_exists(INSTALL_PATH . 'program/js/tiny_mce/langs/'.$lang.'.js'))
$lang = 'en';
@@ -1616,8 +1625,8 @@
'mode' => $mode,
'skin_path' => '$__skin_path',
'lang' => $lang,
- 'spellcheck' => intval($CONFIG['enable_spellcheck']),
- 'spelldict' => intval($CONFIG['spellcheck_dictionary']),
+ 'spellcheck' => intval($RCMAIL->config->get('enable_spellcheck')),
+ 'spelldict' => intval($RCMAIL->config->get('spellcheck_dictionary')),
))), 'foot');
}
@@ -1842,6 +1851,21 @@
$date = preg_replace('/[+-][0-9]{4}$/', $tz, $date);
return $date;
+}
+
+
+/**
+ * Check if we can process not exceeding memory_limit
+ *
+ * @param integer Required amount of memory
+ * @return boolean
+ */
+function rcmail_mem_check($need)
+{
+ $mem_limit = parse_bytes(ini_get('memory_limit'));
+ $memory = function_exists('memory_get_usage') ? memory_get_usage() : 16*1024*1024; // safe value: 16MB
+
+ return $mem_limit && $memory + $need > $mem_limit ? false : true;
}
@@ -2384,3 +2408,27 @@
$RCMAIL->output->set_env('autocomplete_min_length', $RCMAIL->config->get('autocomplete_min_length'));
$RCMAIL->output->add_label('autocompletechars', 'autocompletemore');
}
+
+function rcube_fontdefs($font = null)
+{
+ $fonts = array(
+ 'Andale Mono' => '"Andale Mono",Times,monospace',
+ 'Arial' => 'Arial,Helvetica,sans-serif',
+ 'Arial Black' => '"Arial Black","Avant Garde",sans-serif',
+ 'Book Antiqua' => '"Book Antiqua",Palatino,serif',
+ 'Courier New' => '"Courier New",Courier,monospace',
+ 'Georgia' => 'Georgia,Palatino,serif',
+ 'Helvetica' => 'Helvetica,Arial,sans-serif',
+ 'Impact' => 'Impact,Chicago,sans-serif',
+ 'Tahoma' => 'Tahoma,Arial,Helvetica,sans-serif',
+ 'Terminal' => 'Terminal,Monaco,monospace',
+ 'Times New Roman' => '"Times New Roman",Times,serif',
+ 'Trebuchet MS' => '"Trebuchet MS",Geneva,sans-serif',
+ 'Verdana' => 'Verdana,Geneva,sans-serif',
+ );
+
+ if ($font)
+ return $fonts[$font];
+
+ return $fonts;
+}
--
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