diff options
Diffstat (limited to 'include/bbcode.php')
| -rw-r--r-- | include/bbcode.php | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/include/bbcode.php b/include/bbcode.php index 2e2faddd6..bd2c7d11a 100644 --- a/include/bbcode.php +++ b/include/bbcode.php @@ -262,6 +262,56 @@ function rpost_callback($match) { } } +function bb_sanitize_style($input) { + //whitelist property limits (0 = no limitation) + $w = array( // color properties + "color" => 0, + "background-color" => 0, + // box properties + "padding" => array("px"=>100, "%"=>0, "em"=>2, "ex"=>2, "mm"=>0, "cm"=>0, "in"=>0, "pt"=>0, "pc"=>0), + "margin" => array("px"=>100, "%"=>0, "em"=>2, "ex"=>2, "mm"=>0, "cm"=>0, "in"=>0, "pt"=>0, "pc"=>0), + "border" => array("px"=>100, "%"=>0, "em"=>2, "ex"=>2, "mm"=>0, "cm"=>0, "in"=>0, "pt"=>0, "pc"=>0), + "float" => 0, + "clear" => 0, + // text properties + "text-decoration" => 0, + + ); + + $css_string = $input[1]; + $a = explode(';',$css_string); + foreach($a as $parts){ + list($k, $v) = explode(':', $parts); + $css[ trim($k) ] = trim($v); + } + + // sanitize properties + $b = array_merge(array_diff_key($css, $w), array_diff_key($w, $css)); + $css = array_diff_key($css, $b); + + foreach($css as $key => $value) { + if($w[$key] != null) { + foreach($w[$key] as $limit_key => $limit_value) { + //sanitize values + if(strpos($value, $limit_key)) { + $value = preg_replace_callback( + "/(\S.*?)$limit_key/ism", + function($match) use($limit_value, $limit_key) { + if($match[1] > $limit_value) { + return $limit_value . $limit_key; + } else { + return $match[1] . $limit_key; + } + }, + $value + ); + } + } + } + $css_string_san .= $key . ":" . $value ."; "; + } + return "<span style=\"" . $css_string_san . "\">" . $input[2] . "</span>"; +} // BBcode 2 HTML was written by WAY2WEB.net // extended to work with Mistpark/Friendica/Red - Mike Macgirvin @@ -576,6 +626,11 @@ function bbcode($Text,$preserve_nl = false, $tryoembed = true) { $Text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*) float=right\](.*?)\[\/zmg\]/ism", '<img class="zrl" src="$3" style="width: $1px; float: right;" alt="' . t('Image/photo') . '" >', $Text); } + // style (sanitized) + if (strpos($Text,'[/style]') !== false) { + $Text = preg_replace_callback("(\[style=(.*?)\](.*?)\[\/style\])ism", "bb_sanitize_style", $Text); + } + // crypt if (strpos($Text,'[/crypt]') !== false) { $x = random_string(); |