Revert r2322; this is done in rcmail_html4inline() and now secured + fix tests

program/include/rcmail.php

@@ -47,7 +47,7 @@ class rcmail
   /**
    * This implements the 'singleton' design pattern
    *
-   * @return object qvert The one and only instance
+   * @return object rcmail The one and only instance
    */
   static function get_instance()
   {

program/steps/mail/func.inc

@@ -21,7 +21,7 @@
 
 require_once('include/rcube_smtp.inc');
 
-$EMAIL_ADDRESS_PATTERN = '/([a-z0-9][a-z0-9\-\.\+\_]*@[a-z0-9]([a-z0-9\-][.]?)*[a-z0-9]\\.[a-z]{2,5})/i';
+$EMAIL_ADDRESS_PATTERN = '([a-z0-9][a-z0-9\-\.\+\_]*@[a-z0-9]([a-z0-9\-][.]?)*[a-z0-9]\\.[a-z]{2,5})';
 
 // actions that do not require imap connection
 $NOIMAP_ACTIONS = array('spell', 'addcontact', 'autocomplete', 'upload', 'display-attachment', 'remove-attachment');
@@ -707,7 +707,6 @@ function rcmail_wash_html($html, $p = array(), $cid_replaces)
   }
     
   $washer = new washtml($wash_opts);
-  $washer->add_callback('a', 'rcmail_washtml_callback');
   $washer->add_callback('form', 'rcmail_washtml_callback');
 
   if ($p['safe']) {  // allow CSS styles, will be sanitized by rcmail_washtml_callback()
@@ -820,11 +819,6 @@ function rcmail_washtml_callback($tagname, $attrib, $content)
       $out = html::div('form', $content);
       break;
       
-    case 'a':
-      if ($attrib) $attrib .= ' target="_blank"';
-      $out = '<a'.$attrib.'>' . $content . '</a>';
-      break;
-      
     case 'style':
       // decode all escaped entities and reduce to ascii strings
       $stripped = preg_replace('/[^a-zA-Z\(:]/', '', rcmail_xss_entitiy_decode($content));
@@ -1040,7 +1034,9 @@ function rcmail_html4inline($body, $container_id)
     }
 
   // modify HTML links to open a new window if clicked
-  $body = preg_replace('/<(a|link)\s+([^>]+)>/Uie', "rcmail_alter_html_link('\\1','\\2', '$container_id');", $body);
+  $GLOBALS['rcmail_html_container_id'] = $container_id;
+  $body = preg_replace_callback('/<(a|link)\s+([^>]+)>/Ui', 'rcmail_alter_html_link', $body);
+  unset($GLOBALS['rcmail_html_container_id']);
 
   // add comments arround html and other tags
   $out = preg_replace(array(
@@ -1068,20 +1064,24 @@ function rcmail_html4inline($body, $container_id)
 /**
  * parse link attributes and set correct target
  */
-function rcmail_alter_html_link($tag, $attrs, $container_id)
+function rcmail_alter_html_link($matches)
 {
-  $attrib = parse_attrib_string($attrs);
+  global $EMAIL_ADDRESS_PATTERN;
+  
+  $tag = $matches[1];
+  $attrib = parse_attrib_string($matches[2]);
   $end = '>';
 
   if ($tag == 'link' && preg_match('/^https?:\/\//i', $attrib['href'])) {
-    $attrib['href'] = "./bin/modcss.php?u=" . urlencode($attrib['href']) . "&amp;c=" . urlencode($container_id);
+    $attrib['href'] = "./bin/modcss.php?u=" . urlencode($attrib['href']) . "&amp;c=" . urlencode($GLOBALS['rcmail_html_container_id']);
     $end = ' />';
   }
-  else if (stristr((string)$attrib['href'], 'mailto:')) {
+  else if (preg_match("/^mailto:$EMAIL_ADDRESS_PATTERN/i", $attrib['href'], $mailto)) {
+    $attrib['href'] = $mailto[0];
     $attrib['onclick'] = sprintf(
       "return %s.command('compose','%s',this)",
       JS_OBJECT_NAME,
-      JQ(substr($attrib['href'], 7)));
+      JQ($mailto[1]));
   }
   else if (!empty($attrib['href']) && $attrib['href'][0] != '#') {
     $attrib['target'] = '_blank';
@@ -1112,7 +1112,7 @@ function rcmail_address_string($input, $max=null, $linked=false, $addicon=null)
     if ($PRINT_MODE) {
       $out .= sprintf('%s &lt;%s&gt;', Q($part['name']), $part['mailto']);
     }
-    else if (preg_match($EMAIL_ADDRESS_PATTERN, $part['mailto'])) {
+    else if (preg_match("/$EMAIL_ADDRESS_PATTERN/i", $part['mailto'])) {
       if ($linked) {
         $out .= html::a(array(
             'href' => 'mailto:'.$part['mailto'],

tests/mailfunc.php

@@ -19,6 +19,8 @@ class rcube_test_mailfunc extends UnitTestCase
     $IMAP = $RCMAIL->imap;
     
     require_once 'steps/mail/func.inc';
+    
+    $GLOBALS['EMAIL_ADDRESS_PATTERN'] = $EMAIL_ADDRESS_PATTERN;
   }
 
   /**
@@ -43,7 +45,7 @@ class rcube_test_mailfunc extends UnitTestCase
     $part->replaces = array('ex1.jpg' => 'part_1.2.jpg', 'ex2.jpg' => 'part_1.2.jpg');
     
     // render HTML in normal mode
-    $html = rcmail_print_body($part, array('safe' => false));
+    $html = rcmail_html4inline(rcmail_print_body($part, array('safe' => false)), 'foo');
 
     $this->assertPattern('/src="'.$part->replaces['ex1.jpg'].'"/', $html, "Replace reference to inline image");
     $this->assertPattern('#background="./program/blocked.gif"#', $html, "Replace external background image");
@@ -71,10 +73,13 @@ class rcube_test_mailfunc extends UnitTestCase
   {
     $part = $this->get_html_part('src/htmlxss.txt');
     $washed = rcmail_print_body($part, array('safe' => true));
-
+    
     $this->assertNoPattern('/src="skins/', $washed, "Remove local references");
-    $this->assertNoPattern('/\son[a-z]+/', $wahsed, "Remove on* attributes");
+    $this->assertNoPattern('/\son[a-z]+/', $washed, "Remove on* attributes");
-    $this->assertNoPattern('/alert/', $wahsed, "Remove alerts");
+    
+    $html = rcmail_html4inline($washed, 'foo');
+    $this->assertNoPattern('/onclick="return rcmail.command(\'compose\',\'xss@somehost.net\',this)"/', $html, "Clean mailto links");
+    $this->assertNoPattern('/alert/', $html, "Remove alerts");
   }
 
   /**

tests/src/htmlxss.txt

@@ -3,7 +3,7 @@
 
 <p><img onLoad.="alert(document.cookie)" src="skins/default/images/roundcube_logo.png" /></p>
 
-<p><a href="javascript:alert(document.cookie)">mail me!</a>
+<p><a href="mailto:xss@somehost.net') && alert(document.cookie) || ignore('">mail me!</a>
 <a href="http://roundcube.net" target="_self">roundcube.net</a>
 <a href="http://roundcube.net" \onmouseover="alert('XSS')">roundcube.net (2)</a>