From 3412e50b54e3daac8745234e21ab6e72be0ed165 Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <thomas@roundcube.net>
Date: Wed, 04 Jun 2014 11:20:33 -0400
Subject: [PATCH] Fix attachment menu structure and aria-attributes
---
program/lib/Roundcube/rcube_washtml.php | 199 ++++++++++++++++++++++++++++++++++++++++---------
1 files changed, 160 insertions(+), 39 deletions(-)
diff --git a/program/lib/Roundcube/rcube_washtml.php b/program/lib/Roundcube/rcube_washtml.php
index a42b61a..e23e5b2 100644
--- a/program/lib/Roundcube/rcube_washtml.php
+++ b/program/lib/Roundcube/rcube_washtml.php
@@ -171,7 +171,7 @@
*/
private function wash_style($style)
{
- $s = '';
+ $result = array();
foreach (explode(';', $style) as $declaration) {
if (preg_match('/^\s*([a-z\-]+)\s*:\s*(.*)\s*$/i', $declaration, $match)) {
@@ -179,54 +179,48 @@
$str = $match[2];
$value = '';
- while (sizeof($str) > 0 &&
- preg_match('/^(url\(\s*[\'"]?([^\'"\)]*)[\'"]?\s*\)'./*1,2*/
- '|rgb\(\s*[0-9]+\s*,\s*[0-9]+\s*,\s*[0-9]+\s*\)'.
- '|-?[0-9.]+\s*(em|ex|px|cm|mm|in|pt|pc|deg|rad|grad|ms|s|hz|khz|%)?'.
- '|#[0-9a-f]{3,6}'.
- '|[a-z0-9", -]+'.
- ')\s*/i', $str, $match)
- ) {
- if ($match[2]) {
- if (($src = $this->config['cid_map'][$match[2]])
- || ($src = $this->config['cid_map'][$this->config['base_url'].$match[2]])
- ) {
- $value .= ' url('.htmlspecialchars($src, ENT_QUOTES) . ')';
- }
- else if (preg_match('!^(https?:)?//[a-z0-9/._+-]+$!i', $match[2], $url)) {
- if ($this->config['allow_remote']) {
- $value .= ' url('.htmlspecialchars($url[0], ENT_QUOTES).')';
+ foreach ($this->explode_style($str) as $val) {
+ if (preg_match('/^url\(/i', $val)) {
+ if (preg_match('/^url\(\s*[\'"]?([^\'"\)]*)[\'"]?\s*\)/iu', $val, $match)) {
+ $url = $match[1];
+ if (($src = $this->config['cid_map'][$url])
+ || ($src = $this->config['cid_map'][$this->config['base_url'].$url])
+ ) {
+ $value .= ' url('.htmlspecialchars($src, ENT_QUOTES) . ')';
}
- else {
- $this->extlinks = true;
+ else if (preg_match('!^(https?:)?//[a-z0-9/._+-]+$!i', $url, $m)) {
+ if ($this->config['allow_remote']) {
+ $value .= ' url('.htmlspecialchars($m[0], ENT_QUOTES).')';
+ }
+ else {
+ $this->extlinks = true;
+ }
}
- }
- else if (preg_match('/^data:.+/i', $match[2])) { // RFC2397
- $value .= ' url('.htmlspecialchars($match[2], ENT_QUOTES).')';
+ else if (preg_match('/^data:.+/i', $url)) { // RFC2397
+ $value .= ' url('.htmlspecialchars($url, ENT_QUOTES).')';
+ }
}
}
- else {
+ else if (!preg_match('/^(behavior|expression)/i', $val)) {
// whitelist ?
- $value .= ' ' . $match[0];
+ $value .= ' ' . $val;
// #1488535: Fix size units, so width:800 would be changed to width:800px
if (preg_match('/(left|right|top|bottom|width|height)/i', $cssid)
- && preg_match('/^[0-9]+$/', $match[0])
+ && preg_match('/^[0-9]+$/', $val)
) {
$value .= 'px';
}
}
-
- $str = substr($str, strlen($match[0]));
}
if (isset($value[0])) {
- $s .= ($s?' ':'') . $cssid . ':' . $value . ';';
+ $result[] = $cssid . ':' . $value;
}
}
}
- return $s;
+ return implode('; ', $result);
}
/**
@@ -283,10 +277,12 @@
/**
* The main loop that recurse on a node tree.
- * It output only allowed tags with allowed attributes
- * and allowed inline styles
+ * It output only allowed tags with allowed attributes and allowed inline styles
+ *
+ * @param DOMNode $node HTML element
+ * @param int $level Recurrence level (safe initial value found empirically)
*/
- private function dumpHtml($node, $level = 0)
+ private function dumpHtml($node, $level = 20)
{
if (!$node->hasChildNodes()) {
return '';
@@ -418,7 +414,7 @@
$html = preg_replace($html_search, $html_replace, trim($html));
//-> Replace all of those weird MS Word quotes and other high characters
- $badwordchars=array(
+ $badwordchars = array(
"\xe2\x80\x98", // left single quote
"\xe2\x80\x99", // right single quote
"\xe2\x80\x9c", // left double quote
@@ -426,7 +422,7 @@
"\xe2\x80\x94", // em dash
"\xe2\x80\xa6" // elipses
);
- $fixedwordchars=array(
+ $fixedwordchars = array(
"'",
"'",
'"',
@@ -434,7 +430,7 @@
'—',
'...'
);
- $html = str_replace($badwordchars,$fixedwordchars, $html);
+ $html = str_replace($badwordchars, $fixedwordchars, $html);
// PCRE errors handling (#1486856), should we use something like for every preg_* use?
if ($html === null && ($preg_error = preg_last_error()) != PREG_NO_ERROR) {
@@ -455,12 +451,15 @@
}
// fix (unknown/malformed) HTML tags before "wash"
- $html = preg_replace_callback('/(<[\/]*)([^\s>]+)/', array($this, 'html_tag_callback'), $html);
+ $html = preg_replace_callback('/(<(?!\!)[\/]*)([^\s>]+)([^>]*)/', array($this, 'html_tag_callback'), $html);
// Remove invalid HTML comments (#1487759)
// Don't remove valid conditional comments
// Don't remove MSOutlook (<!-->) conditional comments (#1489004)
$html = preg_replace('/<!--[^->\[\n]+>/', '', $html);
+
+ // fix broken nested lists
+ self::fix_broken_lists($html);
// turn relative into absolute urls
$html = self::resolve_base($html);
@@ -479,7 +478,12 @@
'/[^a-z0-9_\[\]\!-]/i', // forbidden characters
), '', $tagname);
- return $matches[1] . $tagname;
+ // fix invalid closing tags - remove any attributes (#1489446)
+ if ($matches[1] == '</') {
+ $matches[3] = '';
+ }
+
+ return $matches[1] . $tagname . $matches[3];
}
/**
@@ -495,5 +499,122 @@
return $body;
}
-}
+ /**
+ * Fix broken nested lists, they are not handled properly by DOMDocument (#1488768)
+ */
+ public static function fix_broken_lists(&$html)
+ {
+ // do two rounds, one for <ol>, one for <ul>
+ foreach (array('ol', 'ul') as $tag) {
+ $pos = 0;
+ while (($pos = stripos($html, '<' . $tag, $pos)) !== false) {
+ $pos++;
+
+ // make sure this is an ol/ul tag
+ if (!in_array($html[$pos+2], array(' ', '>'))) {
+ continue;
+ }
+
+ $p = $pos;
+ $in_li = false;
+ $li_pos = 0;
+
+ while (($p = strpos($html, '<', $p)) !== false) {
+ $tt = strtolower(substr($html, $p, 4));
+
+ // li open tag
+ if ($tt == '<li>' || $tt == '<li ') {
+ $in_li = true;
+ $p += 4;
+ }
+ // li close tag
+ else if ($tt == '</li' && in_array($html[$p+4], array(' ', '>'))) {
+ $li_pos = $p;
+ $p += 4;
+ $in_li = false;
+ }
+ // ul/ol closing tag
+ else if ($tt == '</' . $tag && in_array($html[$p+4], array(' ', '>'))) {
+ break;
+ }
+ // nested ol/ul element out of li
+ else if (!$in_li && $li_pos && ($tt == '<ol>' || $tt == '<ol ' || $tt == '<ul>' || $tt == '<ul ')) {
+ // find closing tag of this ul/ol element
+ $element = substr($tt, 1, 2);
+ $cpos = $p;
+ do {
+ $tpos = stripos($html, '<' . $element, $cpos+1);
+ $cpos = stripos($html, '</' . $element, $cpos+1);
+ }
+ while ($tpos !== false && $cpos !== false && $cpos > $tpos);
+
+ // not found, this is invalid HTML, skip it
+ if ($cpos === false) {
+ break;
+ }
+
+ // get element content
+ $end = strpos($html, '>', $cpos);
+ $len = $end - $p + 1;
+ $element = substr($html, $p, $len);
+
+ // move element to the end of the last li
+ $html = substr_replace($html, '', $p, $len);
+ $html = substr_replace($html, $element, $li_pos, 0);
+
+ $p = $end;
+ }
+ else {
+ $p++;
+ }
+ }
+ }
+ }
+ }
+
+ /**
+ * Explode css style value
+ */
+ protected function explode_style($style)
+ {
+ $style = trim($style);
+
+ // first remove comments
+ $pos = 0;
+ while (($pos = strpos($style, '/*', $pos)) !== false) {
+ $end = strpos($style, '*/', $pos+2);
+
+ if ($end === false) {
+ $style = substr($style, 0, $pos);
+ }
+ else {
+ $style = substr_replace($style, '', $pos, $end - $pos + 2);
+ }
+ }
+
+ $strlen = strlen($style);
+ $result = array();
+
+ // explode value
+ for ($p=$i=0; $i < $strlen; $i++) {
+ if (($style[$i] == "\"" || $style[$i] == "'") && $style[$i-1] != "\\") {
+ if ($q == $style[$i]) {
+ $q = false;
+ }
+ else if (!$q) {
+ $q = $style[$i];
+ }
+ }
+
+ if (!$q && $style[$i] == ' ' && !preg_match('/[,\(]/', $style[$i-1])) {
+ $result[] = substr($style, $p, $i - $p);
+ $p = $i + 1;
+ }
+ }
+
+ $result[] = (string) substr($style, $p);
+
+ return $result;
+ }
+}
--
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