diff options
| author | thomascube <thomas@roundcube.net> | 2008-07-22 08:01:42 +0000 |
|---|---|---|
| committer | thomascube <thomas@roundcube.net> | 2008-07-22 08:01:42 +0000 |
| commit | 21e724153e80249d0b0f0aaa2f730ad2c045532c (patch) | |
| tree | 08d5f1b5d29b089e09bdcfdb7f17e696759b402e /program/steps/mail/func.inc | |
| parent | 808fb26b619bb858cd77010a7d42648e21f07f81 (diff) | |
Improve HTML sanitization with washtml
Diffstat (limited to 'program/steps/mail/func.inc')
| -rw-r--r-- | program/steps/mail/func.inc | 66 |
1 files changed, 49 insertions, 17 deletions
diff --git a/program/steps/mail/func.inc b/program/steps/mail/func.inc index 58c9c8bd7..36605894a 100644 --- a/program/steps/mail/func.inc +++ b/program/steps/mail/func.inc @@ -539,12 +539,14 @@ function rcmail_get_messagecount_text($count=NULL, $page=NULL) * @param bool True if part should be converted to plaintext * @return string Formatted HTML string */ -function rcmail_print_body($part, $safe=false, $plain=false) +function rcmail_print_body($part, $p = array()) { global $REMOTE_OBJECTS; + $p += array('safe' => false, 'plain' => false, 'inline_html' => true); + // convert html to text/plain - if ($part->ctype_secondary == 'html' && $plain) { + if ($part->ctype_secondary == 'html' && $p['plain']) { $txt = new html2text($part->body, false, true); $body = $txt->get_text(); $part->ctype_secondary = 'plain'; @@ -553,25 +555,40 @@ function rcmail_print_body($part, $safe=false, $plain=false) else if ($part->ctype_secondary == 'html') { // charset was converted to UTF-8 in rcube_imap::get_message_part() -> change charset specification in HTML accordingly $html = $part->body; - if(preg_match('/(\s+content=[\'"]\w+\/\w+;\s+charset)=([a-z0-9-]+)/i', $html)) - $html = preg_replace('/(\s+content=[\'"]\w+\/\w+;\s+charset)=([a-z0-9-]+)/i', '\\1='.RCMAIL_CHARSET, $html); + if (preg_match('/(\s+content=[\'"]\w+\/\w+;\s*charset)=([a-z0-9-]+)/i', $html)) + $html = preg_replace('/(\s+content=[\'"]\w+\/\w+;\s*charset)=([a-z0-9-]+)/i', '\\1='.RCMAIL_CHARSET, $html); else { // add <head> for malformed messages, washtml cannot work without that - if (!preg_match('/<head>(.*)<\/head>/m', $html)) + if (!preg_match('/<head>(.*)<\\/head>/Uims', $html)) $html = '<head></head>' . $html; $html = substr_replace($html, '<meta http-equiv="Content-Type" content="text/html; charset='.RCMAIL_CHARSET.'" />', intval(stripos($html, '</head>')), 0); } - + // clean HTML with washhtml by Frederic Motte - $body = washtml::wash($html, array( + $wash_opts = array( 'show_washed' => false, - 'allow_remote' => $safe, + 'allow_remote' => $p['safe'], 'blocked_src' => "./program/blocked.gif", 'charset' => RCMAIL_CHARSET, 'cid_map' => $part->replaces, - ), $full_inline); - - $REMOTE_OBJECTS = !$full_inline; + 'html_elements' => array('body'), + ); + + if (!$p['inline_html']) { + $wash_opts['html_elements'] = array('html','head','title','body'); + } + + /* CSS styles need to be sanitized! + if ($p['safe']) { + $wash_opts['html_elements'][] = 'style'; + $wash_opts['html_attribs'] = array('type'); + } + */ + + $washer = new washtml($wash_opts); + $washer->add_callback('form', 'rcmail_washtml_callback'); + $body = $washer->wash($html); + $REMOTE_OBJECTS = $washer->extlinks; return $body; } @@ -637,21 +654,36 @@ function rcmail_print_body($part, $safe=false, $plain=false) $body = preg_replace("/##string_replacement\{([0-9]+)\}##/e", "\$replace_strings[\\1]", join("\n", $a_lines)); return "<div class=\"pre\">".$body."\n</div>"; - } - - +} /** * add a string to the replacement array and return a replacement string */ function rcmail_str_replacement($str, &$rep) - { +{ static $count = 0; $rep[$count] = stripslashes($str); return "##string_replacement{".($count++)."}##"; - } +} +/** + * Callback function for washtml cleaning class + */ +function rcmail_washtml_callback($tagname, $attrib, $content) +{ + switch ($tagname) { + case 'form': + $out = html::div('form', $content); + break; + + default: + $out = ''; + } + + return $out; +} + /** * return table with message headers @@ -756,7 +788,7 @@ function rcmail_message_body($attrib) if (!isset($part->body)) $part->body = $MESSAGE->get_part_content($part->mime_id); - $body = rcmail_print_body($part, $safe_mode, !$CONFIG['prefer_html']); + $body = rcmail_print_body($part, array('safe' => $safe_mode, 'plain' => !$CONFIG['prefer_html'])); if ($part->ctype_secondary == 'html') $out .= html::div('message-htmlpart', rcmail_html4inline($body, $attrib['id'])); |