X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/58f607a1de715c9bca69340a4d6fb9e1b9c2bed2..53f4633144ed68c8b8fb5861f992b5489894a940:/wp-includes/kses.php
diff --git a/wp-includes/kses.php b/wp-includes/kses.php
index 4a0a6790..578c5ba4 100644
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -1,36 +1,53 @@
+ * @author Ulf Harnhammar
*
* @package External
* @subpackage KSES
*
- * @internal
- * *** CONTACT INFORMATION ***
- * E-mail: metaur at users dot sourceforge dot net
- * Web page: http://sourceforge.net/projects/kses
- * Paper mail: Ulf Harnhammar
- * Ymergatan 17 C
- * 753 25 Uppsala
- * SWEDEN
- *
- * [kses strips evil scripts!]
*/
/**
* You can override this in a plugin.
*
+ * The wp_kses_allowed_html filter is more powerful and supplies context.
+ * CUSTOM_TAGS is not recommended and should be considered deprecated.
+ *
+ * @see wp_kses_allowed_html()
+ *
* @since 1.2.0
*/
if ( ! defined( 'CUSTOM_TAGS' ) )
define( 'CUSTOM_TAGS', false );
+// Ensure that these variables are added to the global namespace
+// (e.g. if using namespaces / autoload in the current PHP environment).
+global $allowedposttags, $allowedtags, $allowedentitynames;
+
if ( ! CUSTOM_TAGS ) {
/**
* Kses global for default allowable HTML tags.
@@ -43,348 +60,355 @@ if ( ! CUSTOM_TAGS ) {
$allowedposttags = array(
'address' => array(),
'a' => array(
- 'class' => array (),
- 'href' => array (),
- 'id' => array (),
- 'title' => array (),
- 'rel' => array (),
- 'rev' => array (),
- 'name' => array (),
- 'target' => array()),
- 'abbr' => array(
- 'class' => array (),
- 'title' => array ()),
- 'acronym' => array(
- 'title' => array ()),
+ 'href' => true,
+ 'rel' => true,
+ 'rev' => true,
+ 'name' => true,
+ 'target' => true,
+ ),
+ 'abbr' => array(),
+ 'acronym' => array(),
+ 'area' => array(
+ 'alt' => true,
+ 'coords' => true,
+ 'href' => true,
+ 'nohref' => true,
+ 'shape' => true,
+ 'target' => true,
+ ),
'article' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'aside' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'audio' => array(
+ 'autoplay' => true,
+ 'controls' => true,
+ 'loop' => true,
+ 'muted' => true,
+ 'preload' => true,
+ 'src' => true,
),
'b' => array(),
'big' => array(),
'blockquote' => array(
- 'id' => array (),
- 'cite' => array (),
- 'class' => array(),
- 'lang' => array(),
- 'xml:lang' => array()),
- 'br' => array (
- 'class' => array ()),
+ 'cite' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'br' => array(),
'button' => array(
- 'disabled' => array (),
- 'name' => array (),
- 'type' => array (),
- 'value' => array ()),
+ 'disabled' => true,
+ 'name' => true,
+ 'type' => true,
+ 'value' => true,
+ ),
'caption' => array(
- 'align' => array (),
- 'class' => array ()),
- 'cite' => array (
- 'class' => array(),
- 'dir' => array(),
- 'lang' => array(),
- 'title' => array ()),
- 'code' => array (
- 'style' => array()),
+ 'align' => true,
+ ),
+ 'cite' => array(
+ 'dir' => true,
+ 'lang' => true,
+ ),
+ 'code' => array(),
'col' => array(
- 'align' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'span' => array (),
- 'dir' => array(),
- 'style' => array (),
- 'valign' => array (),
- 'width' => array ()),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'span' => true,
+ 'dir' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
+ 'colgroup' => array(
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'span' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
'del' => array(
- 'datetime' => array ()),
+ 'datetime' => true,
+ ),
'dd' => array(),
+ 'dfn' => array(),
'details' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'open' => array (),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'open' => true,
+ 'xml:lang' => true,
),
'div' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array()),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'dl' => array(),
'dt' => array(),
'em' => array(),
'fieldset' => array(),
'figure' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'figcaption' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'font' => array(
- 'color' => array (),
- 'face' => array (),
- 'size' => array ()),
+ 'color' => true,
+ 'face' => true,
+ 'size' => true,
+ ),
'footer' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'form' => array(
- 'action' => array (),
- 'accept' => array (),
- 'accept-charset' => array (),
- 'enctype' => array (),
- 'method' => array (),
- 'name' => array (),
- 'target' => array ()),
+ 'action' => true,
+ 'accept' => true,
+ 'accept-charset' => true,
+ 'enctype' => true,
+ 'method' => true,
+ 'name' => true,
+ 'target' => true,
+ ),
'h1' => array(
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h2' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h3' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h4' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h5' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
- 'h6' => array (
- 'align' => array (),
- 'class' => array (),
- 'id' => array (),
- 'style' => array ()),
+ 'align' => true,
+ ),
+ 'h2' => array(
+ 'align' => true,
+ ),
+ 'h3' => array(
+ 'align' => true,
+ ),
+ 'h4' => array(
+ 'align' => true,
+ ),
+ 'h5' => array(
+ 'align' => true,
+ ),
+ 'h6' => array(
+ 'align' => true,
+ ),
'header' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'hgroup' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
+ 'hr' => array(
+ 'align' => true,
+ 'noshade' => true,
+ 'size' => true,
+ 'width' => true,
),
- 'hr' => array (
- 'align' => array (),
- 'class' => array (),
- 'noshade' => array (),
- 'size' => array (),
- 'width' => array ()),
'i' => array(),
'img' => array(
- 'alt' => array (),
- 'align' => array (),
- 'border' => array (),
- 'class' => array (),
- 'height' => array (),
- 'hspace' => array (),
- 'longdesc' => array (),
- 'vspace' => array (),
- 'src' => array (),
- 'style' => array (),
- 'width' => array ()),
+ 'alt' => true,
+ 'align' => true,
+ 'border' => true,
+ 'height' => true,
+ 'hspace' => true,
+ 'longdesc' => true,
+ 'vspace' => true,
+ 'src' => true,
+ 'usemap' => true,
+ 'width' => true,
+ ),
'ins' => array(
- 'datetime' => array (),
- 'cite' => array ()),
+ 'datetime' => true,
+ 'cite' => true,
+ ),
'kbd' => array(),
'label' => array(
- 'for' => array ()),
+ 'for' => true,
+ ),
'legend' => array(
- 'align' => array ()),
- 'li' => array (
- 'align' => array (),
- 'class' => array ()),
- 'menu' => array (
- 'class' => array (),
- 'style' => array (),
- 'type' => array ()),
+ 'align' => true,
+ ),
+ 'li' => array(
+ 'align' => true,
+ 'value' => true,
+ ),
+ 'map' => array(
+ 'name' => true,
+ ),
+ 'mark' => array(),
+ 'menu' => array(
+ 'type' => true,
+ ),
'nav' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'p' => array(
- 'class' => array (),
- 'align' => array (),
- 'dir' => array(),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array()),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'pre' => array(
- 'style' => array(),
- 'width' => array ()),
+ 'width' => true,
+ ),
'q' => array(
- 'cite' => array ()),
+ 'cite' => true,
+ ),
's' => array(),
- 'span' => array (
- 'class' => array (),
- 'dir' => array (),
- 'align' => array (),
- 'lang' => array (),
- 'style' => array (),
- 'title' => array (),
- 'xml:lang' => array()),
+ 'samp' => array(),
+ 'span' => array(
+ 'dir' => true,
+ 'align' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
+ ),
'section' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
+ 'small' => array(),
'strike' => array(),
'strong' => array(),
'sub' => array(),
'summary' => array(
- 'align' => array (),
- 'class' => array (),
- 'dir' => array (),
- 'lang' => array(),
- 'style' => array (),
- 'xml:lang' => array(),
+ 'align' => true,
+ 'dir' => true,
+ 'lang' => true,
+ 'xml:lang' => true,
),
'sup' => array(),
'table' => array(
- 'align' => array (),
- 'bgcolor' => array (),
- 'border' => array (),
- 'cellpadding' => array (),
- 'cellspacing' => array (),
- 'class' => array (),
- 'dir' => array(),
- 'id' => array(),
- 'rules' => array (),
- 'style' => array (),
- 'summary' => array (),
- 'width' => array ()),
+ 'align' => true,
+ 'bgcolor' => true,
+ 'border' => true,
+ 'cellpadding' => true,
+ 'cellspacing' => true,
+ 'dir' => true,
+ 'rules' => true,
+ 'summary' => true,
+ 'width' => true,
+ ),
'tbody' => array(
- 'align' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'valign' => array ()),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
'td' => array(
- 'abbr' => array (),
- 'align' => array (),
- 'axis' => array (),
- 'bgcolor' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => array (),
- 'colspan' => array (),
- 'dir' => array(),
- 'headers' => array (),
- 'height' => array (),
- 'nowrap' => array (),
- 'rowspan' => array (),
- 'scope' => array (),
- 'style' => array (),
- 'valign' => array (),
- 'width' => array ()),
+ 'abbr' => true,
+ 'align' => true,
+ 'axis' => true,
+ 'bgcolor' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'colspan' => true,
+ 'dir' => true,
+ 'headers' => true,
+ 'height' => true,
+ 'nowrap' => true,
+ 'rowspan' => true,
+ 'scope' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
'textarea' => array(
- 'cols' => array (),
- 'rows' => array (),
- 'disabled' => array (),
- 'name' => array (),
- 'readonly' => array ()),
+ 'cols' => true,
+ 'rows' => true,
+ 'disabled' => true,
+ 'name' => true,
+ 'readonly' => true,
+ ),
'tfoot' => array(
- 'align' => array (),
- 'char' => array (),
- 'class' => array (),
- 'charoff' => array (),
- 'valign' => array ()),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
'th' => array(
- 'abbr' => array (),
- 'align' => array (),
- 'axis' => array (),
- 'bgcolor' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => array (),
- 'colspan' => array (),
- 'headers' => array (),
- 'height' => array (),
- 'nowrap' => array (),
- 'rowspan' => array (),
- 'scope' => array (),
- 'valign' => array (),
- 'width' => array ()),
+ 'abbr' => true,
+ 'align' => true,
+ 'axis' => true,
+ 'bgcolor' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'colspan' => true,
+ 'headers' => true,
+ 'height' => true,
+ 'nowrap' => true,
+ 'rowspan' => true,
+ 'scope' => true,
+ 'valign' => true,
+ 'width' => true,
+ ),
'thead' => array(
- 'align' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => array (),
- 'valign' => array ()),
+ 'align' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
'title' => array(),
'tr' => array(
- 'align' => array (),
- 'bgcolor' => array (),
- 'char' => array (),
- 'charoff' => array (),
- 'class' => array (),
- 'style' => array (),
- 'valign' => array ()),
+ 'align' => true,
+ 'bgcolor' => true,
+ 'char' => true,
+ 'charoff' => true,
+ 'valign' => true,
+ ),
+ 'track' => array(
+ 'default' => true,
+ 'kind' => true,
+ 'label' => true,
+ 'src' => true,
+ 'srclang' => true,
+ ),
'tt' => array(),
'u' => array(),
- 'ul' => array (
- 'class' => array (),
- 'style' => array (),
- 'type' => array ()),
- 'ol' => array (
- 'class' => array (),
- 'start' => array (),
- 'style' => array (),
- 'type' => array ()),
- 'var' => array ());
+ 'ul' => array(
+ 'type' => true,
+ ),
+ 'ol' => array(
+ 'start' => true,
+ 'type' => true,
+ ),
+ 'var' => array(),
+ 'video' => array(
+ 'autoplay' => true,
+ 'controls' => true,
+ 'height' => true,
+ 'loop' => true,
+ 'muted' => true,
+ 'poster' => true,
+ 'preload' => true,
+ 'src' => true,
+ 'width' => true,
+ ),
+ );
/**
* Kses allowed HTML elements.
@@ -394,36 +418,32 @@ if ( ! CUSTOM_TAGS ) {
*/
$allowedtags = array(
'a' => array(
- 'href' => array (),
- 'title' => array ()),
+ 'href' => true,
+ 'title' => true,
+ ),
'abbr' => array(
- 'title' => array ()),
+ 'title' => true,
+ ),
'acronym' => array(
- 'title' => array ()),
+ 'title' => true,
+ ),
'b' => array(),
'blockquote' => array(
- 'cite' => array ()),
- // 'br' => array(),
- 'cite' => array (),
+ 'cite' => true,
+ ),
+ 'cite' => array(),
'code' => array(),
'del' => array(
- 'datetime' => array ()),
- // 'dd' => array(),
- // 'dl' => array(),
- // 'dt' => array(),
- 'em' => array (), 'i' => array (),
- // 'ins' => array('datetime' => array(), 'cite' => array()),
- // 'li' => array(),
- // 'ol' => array(),
- // 'p' => array(),
+ 'datetime' => true,
+ ),
+ 'em' => array(),
+ 'i' => array(),
'q' => array(
- 'cite' => array ()),
+ 'cite' => true,
+ ),
+ 's' => array(),
'strike' => array(),
'strong' => array(),
- // 'sub' => array(),
- // 'sup' => array(),
- // 'u' => array(),
- // 'ul' => array(),
);
$allowedentitynames = array(
@@ -468,7 +488,14 @@ if ( ! CUSTOM_TAGS ) {
'nsub', 'sube', 'supe', 'oplus', 'otimes', 'perp',
'sdot', 'lceil', 'rceil', 'lfloor', 'rfloor', 'lang',
'rang', 'loz', 'spades', 'clubs', 'hearts', 'diams',
+ 'sup1', 'sup2', 'sup3', 'frac14', 'frac12', 'frac34',
+ 'there4',
);
+
+ $allowedposttags = array_map( '_wp_add_global_attributes', $allowedposttags );
+} else {
+ $allowedtags = wp_kses_array_lc( $allowedtags );
+ $allowedposttags = wp_kses_array_lc( $allowedposttags );
}
/**
@@ -486,37 +513,177 @@ if ( ! CUSTOM_TAGS ) {
*
* @since 1.0.0
*
- * @param string $string Content to filter through kses
- * @param array $allowed_html List of allowed HTML elements
- * @param array $allowed_protocols Optional. Allowed protocol in links.
+ * @param string $string Content to filter through kses
+ * @param array $allowed_html List of allowed HTML elements
+ * @param array $allowed_protocols Optional. Allowed protocol in links.
* @return string Filtered content with only allowed HTML elements
*/
-function wp_kses($string, $allowed_html, $allowed_protocols = array ()) {
- $allowed_protocols = wp_parse_args( $allowed_protocols, apply_filters('kses_allowed_protocols', array ('http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn') ));
- $string = wp_kses_no_null($string);
+function wp_kses( $string, $allowed_html, $allowed_protocols = array() ) {
+ if ( empty( $allowed_protocols ) )
+ $allowed_protocols = wp_allowed_protocols();
+ $string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
$string = wp_kses_js_entities($string);
$string = wp_kses_normalize_entities($string);
- $allowed_html_fixed = wp_kses_array_lc($allowed_html);
- $string = wp_kses_hook($string, $allowed_html_fixed, $allowed_protocols); // WP changed the order of these funcs and added args to wp_kses_hook
- return wp_kses_split($string, $allowed_html_fixed, $allowed_protocols);
+ $string = wp_kses_hook($string, $allowed_html, $allowed_protocols); // WP changed the order of these funcs and added args to wp_kses_hook
+ return wp_kses_split($string, $allowed_html, $allowed_protocols);
+}
+
+/**
+ * Filters one attribute only and ensures its value is allowed.
+ *
+ * This function has the advantage of being more secure than esc_attr() and can
+ * escape data in some situations where wp_kses() must strip the whole attribute.
+ *
+ * @since 4.2.3
+ *
+ * @param string $string The 'whole' attribute, including name and value.
+ * @param string $element The element name to which the attribute belongs.
+ * @return string Filtered attribute.
+ */
+function wp_kses_one_attr( $string, $element ) {
+ $uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
+ $allowed_html = wp_kses_allowed_html( 'post' );
+ $allowed_protocols = wp_allowed_protocols();
+ $string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
+ $string = wp_kses_js_entities( $string );
+
+ // Preserve leading and trailing whitespace.
+ $matches = array();
+ preg_match('/^\s*/', $string, $matches);
+ $lead = $matches[0];
+ preg_match('/\s*$/', $string, $matches);
+ $trail = $matches[0];
+ if ( empty( $trail ) ) {
+ $string = substr( $string, strlen( $lead ) );
+ } else {
+ $string = substr( $string, strlen( $lead ), -strlen( $trail ) );
+ }
+
+ // Parse attribute name and value from input.
+ $split = preg_split( '/\s*=\s*/', $string, 2 );
+ $name = $split[0];
+ if ( count( $split ) == 2 ) {
+ $value = $split[1];
+
+ // Remove quotes surrounding $value.
+ // Also guarantee correct quoting in $string for this one attribute.
+ if ( '' == $value ) {
+ $quote = '';
+ } else {
+ $quote = $value[0];
+ }
+ if ( '"' == $quote || "'" == $quote ) {
+ if ( substr( $value, -1 ) != $quote ) {
+ return '';
+ }
+ $value = substr( $value, 1, -1 );
+ } else {
+ $quote = '"';
+ }
+
+ // Sanitize quotes, angle braces, and entities.
+ $value = esc_attr( $value );
+
+ // Sanitize URI values.
+ if ( in_array( strtolower( $name ), $uris ) ) {
+ $value = wp_kses_bad_protocol( $value, $allowed_protocols );
+ }
+
+ $string = "$name=$quote$value$quote";
+ $vless = 'n';
+ } else {
+ $value = '';
+ $vless = 'y';
+ }
+
+ // Sanitize attribute by name.
+ wp_kses_attr_check( $name, $value, $string, $vless, $element, $allowed_html );
+
+ // Restore whitespace.
+ return $lead . $string . $trail;
+}
+
+/**
+ * Return a list of allowed tags and attributes for a given context.
+ *
+ * @since 3.5.0
+ *
+ * @global array $allowedposttags
+ * @global array $allowedtags
+ * @global array $allowedentitynames
+ *
+ * @param string $context The context for which to retrieve tags.
+ * Allowed values are post, strip, data,entities, or
+ * the name of a field filter such as pre_user_description.
+ * @return array List of allowed tags and their allowed attributes.
+ */
+function wp_kses_allowed_html( $context = '' ) {
+ global $allowedposttags, $allowedtags, $allowedentitynames;
+
+ if ( is_array( $context ) ) {
+ /**
+ * Filter HTML elements allowed for a given context.
+ *
+ * @since 3.5.0
+ *
+ * @param string $tags Allowed tags, attributes, and/or entities.
+ * @param string $context Context to judge allowed tags by. Allowed values are 'post',
+ * 'data', 'strip', 'entities', 'explicit', or the name of a filter.
+ */
+ return apply_filters( 'wp_kses_allowed_html', $context, 'explicit' );
+ }
+
+ switch ( $context ) {
+ case 'post':
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $allowedposttags, $context );
+
+ case 'user_description':
+ case 'pre_user_description':
+ $tags = $allowedtags;
+ $tags['a']['rel'] = true;
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $tags, $context );
+
+ case 'strip':
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', array(), $context );
+
+ case 'entities':
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $allowedentitynames, $context);
+
+ case 'data':
+ default:
+ /** This filter is documented in wp-includes/kses.php */
+ return apply_filters( 'wp_kses_allowed_html', $allowedtags, $context );
+ }
}
/**
* You add any kses hooks here.
*
* There is currently only one kses WordPress hook and it is called here. All
- * parameters are passed to the hooks and expected to recieve a string.
+ * parameters are passed to the hooks and expected to receive a string.
*
* @since 1.0.0
*
- * @param string $string Content to filter through kses
- * @param array $allowed_html List of allowed HTML elements
- * @param array $allowed_protocols Allowed protocol in links
+ * @param string $string Content to filter through kses
+ * @param array $allowed_html List of allowed HTML elements
+ * @param array $allowed_protocols Allowed protocol in links
* @return string Filtered content through 'pre_kses' hook
*/
-function wp_kses_hook($string, $allowed_html, $allowed_protocols) {
- $string = apply_filters('pre_kses', $string, $allowed_html, $allowed_protocols);
- return $string;
+function wp_kses_hook( $string, $allowed_html, $allowed_protocols ) {
+ /**
+ * Filter content to be run through kses.
+ *
+ * @since 2.3.0
+ *
+ * @param string $string Content to run through kses.
+ * @param array $allowed_html Allowed HTML elements.
+ * @param array $allowed_protocols Allowed protocol in links.
+ */
+ return apply_filters( 'pre_kses', $string, $allowed_html, $allowed_protocols );
}
/**
@@ -537,17 +704,35 @@ function wp_kses_version() {
*
* @since 1.0.0
*
- * @param string $string Content to filter
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
+ * @global array $pass_allowed_html
+ * @global array $pass_allowed_protocols
+ *
+ * @param string $string Content to filter
+ * @param array $allowed_html Allowed HTML elements
+ * @param array $allowed_protocols Allowed protocols to keep
* @return string Content with fixed HTML tags
*/
-function wp_kses_split($string, $allowed_html, $allowed_protocols) {
+function wp_kses_split( $string, $allowed_html, $allowed_protocols ) {
global $pass_allowed_html, $pass_allowed_protocols;
$pass_allowed_html = $allowed_html;
$pass_allowed_protocols = $allowed_protocols;
- return preg_replace_callback('%((|$))|(<[^>]*(>|$)|>))%',
- create_function('$match', 'global $pass_allowed_html, $pass_allowed_protocols; return wp_kses_split2($match[1], $pass_allowed_html, $pass_allowed_protocols);'), $string);
+ return preg_replace_callback( '%(|$))|(<[^>]*(>|$)|>)%', '_wp_kses_split_callback', $string );
+}
+
+/**
+ * Callback for wp_kses_split.
+ *
+ * @since 3.1.0
+ * @access private
+ *
+ * @global array $pass_allowed_html
+ * @global array $pass_allowed_protocols
+ *
+ * @return string
+ */
+function _wp_kses_split_callback( $match ) {
+ global $pass_allowed_html, $pass_allowed_protocols;
+ return wp_kses_split2( $match[0], $pass_allowed_html, $pass_allowed_protocols );
}
/**
@@ -564,11 +749,10 @@ function wp_kses_split($string, $allowed_html, $allowed_protocols) {
*
* @access private
* @since 1.0.0
- * @uses wp_kses_attr()
*
- * @param string $string Content to filter
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $string Content to filter
+ * @param array $allowed_html Allowed HTML elements
+ * @param array $allowed_protocols Allowed protocols to keep
* @return string Fixed HTML element
*/
function wp_kses_split2($string, $allowed_html, $allowed_protocols) {
@@ -576,11 +760,11 @@ function wp_kses_split2($string, $allowed_html, $allowed_protocols) {
if (substr($string, 0, 1) != '<')
return '>';
- # It matched a ">" character
+ // It matched a ">" character
- if (preg_match('%^)?$%', $string, $matches)) {
- $string = str_replace(array(''), '', $matches[1]);
- while ( $string != $newstring = wp_kses($string, $allowed_html, $allowed_protocols) )
+ if ( ''), '', $string );
+ while ( $string != ($newstring = wp_kses($string, $allowed_html, $allowed_protocols)) )
$string = $newstring;
if ( $string == '' )
return '';
@@ -590,25 +774,28 @@ function wp_kses_split2($string, $allowed_html, $allowed_protocols) {
$string = preg_replace('/-$/', '', $string);
return "";
}
- # Allow HTML comments
+ // Allow HTML comments
if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
return '';
- # It's seriously malformed
+ // It's seriously malformed
$slash = trim($matches[1]);
$elem = $matches[2];
$attrlist = $matches[3];
- if (!@isset($allowed_html[strtolower($elem)]))
+ if ( ! is_array( $allowed_html ) )
+ $allowed_html = wp_kses_allowed_html( $allowed_html );
+
+ if ( ! isset($allowed_html[strtolower($elem)]) )
return '';
- # They are using a not allowed HTML element
+ // They are using a not allowed HTML element
if ($slash != '')
- return "<$slash$elem>";
- # No attributes are allowed for closing elements
+ return "";
+ // No attributes are allowed for closing elements
- return wp_kses_attr("$slash$elem", $attrlist, $allowed_html, $allowed_protocols);
+ return wp_kses_attr( $elem, $attrlist, $allowed_html, $allowed_protocols );
}
/**
@@ -622,77 +809,88 @@ function wp_kses_split2($string, $allowed_html, $allowed_protocols) {
*
* @since 1.0.0
*
- * @param string $element HTML element/tag
- * @param string $attr HTML attributes from HTML element to closing HTML element tag
- * @param array $allowed_html Allowed HTML elements
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $element HTML element/tag
+ * @param string $attr HTML attributes from HTML element to closing HTML element tag
+ * @param array $allowed_html Allowed HTML elements
+ * @param array $allowed_protocols Allowed protocols to keep
* @return string Sanitized HTML element
*/
function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
- # Is there a closing XHTML slash at the end of the attributes?
+ if ( ! is_array( $allowed_html ) )
+ $allowed_html = wp_kses_allowed_html( $allowed_html );
+ // Is there a closing XHTML slash at the end of the attributes?
$xhtml_slash = '';
if (preg_match('%\s*/\s*$%', $attr))
$xhtml_slash = ' /';
- # Are any attributes allowed at all for this element?
-
- if (@ count($allowed_html[strtolower($element)]) == 0)
+ // Are any attributes allowed at all for this element?
+ if ( ! isset($allowed_html[strtolower($element)]) || count($allowed_html[strtolower($element)]) == 0 )
return "<$element$xhtml_slash>";
- # Split it
-
+ // Split it
$attrarr = wp_kses_hair($attr, $allowed_protocols);
- # Go through $attrarr, and save the allowed attributes for this element
- # in $attr2
-
+ // Go through $attrarr, and save the allowed attributes for this element
+ // in $attr2
$attr2 = '';
-
- foreach ($attrarr as $arreach) {
- if (!@ isset ($allowed_html[strtolower($element)][strtolower($arreach['name'])]))
- continue; # the attribute is not allowed
-
- $current = $allowed_html[strtolower($element)][strtolower($arreach['name'])];
- if ($current == '')
- continue; # the attribute is not allowed
-
- if (!is_array($current))
+ foreach ( $attrarr as $arreach ) {
+ if ( wp_kses_attr_check( $arreach['name'], $arreach['value'], $arreach['whole'], $arreach['vless'], $element, $allowed_html ) ) {
$attr2 .= ' '.$arreach['whole'];
- # there are no checks
-
- else {
- # there are some checks
- $ok = true;
- foreach ($current as $currkey => $currval)
- if (!wp_kses_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval)) {
- $ok = false;
- break;
- }
+ }
+ }
- if ( $arreach['name'] == 'style' ) {
- $orig_value = $arreach['value'];
+ // Remove any "<" or ">" characters
+ $attr2 = preg_replace('/[<>]/', '', $attr2);
- $value = safecss_filter_attr($orig_value);
+ return "<$element$attr2$xhtml_slash>";
+}
- if ( empty($value) )
- continue;
+/**
+ * Determine whether an attribute is allowed.
+ *
+ * @since 4.2.3
+ *
+ * @param string $name The attribute name. Returns empty string when not allowed.
+ * @param string $value The attribute value. Returns a filtered value.
+ * @param string $whole The name=value input. Returns filtered input.
+ * @param string $vless 'y' when attribute like "enabled", otherwise 'n'.
+ * @param string $element The name of the element to which this attribute belongs.
+ * @param array $allowed_html The full list of allowed elements and attributes.
+ * @return bool Is the attribute allowed?
+ */
+function wp_kses_attr_check( &$name, &$value, &$whole, $vless, $element, $allowed_html ) {
+ $allowed_attr = $allowed_html[strtolower( $element )];
- $arreach['value'] = $value;
+ $name_low = strtolower( $name );
+ if ( ! isset( $allowed_attr[$name_low] ) || '' == $allowed_attr[$name_low] ) {
+ $name = $value = $whole = '';
+ return false;
+ }
- $arreach['whole'] = str_replace($orig_value, $value, $arreach['whole']);
- }
+ if ( 'style' == $name_low ) {
+ $new_value = safecss_filter_attr( $value );
- if ($ok)
- $attr2 .= ' '.$arreach['whole']; # it passed them
- } # if !is_array($current)
- } # foreach
+ if ( empty( $new_value ) ) {
+ $name = $value = $whole = '';
+ return false;
+ }
- # Remove any "<" or ">" characters
+ $whole = str_replace( $value, $new_value, $whole );
+ $value = $new_value;
+ }
- $attr2 = preg_replace('/[<>]/', '', $attr2);
+ if ( is_array( $allowed_attr[$name_low] ) ) {
+ // there are some checks
+ foreach ( $allowed_attr[$name_low] as $currkey => $currval ) {
+ if ( ! wp_kses_check_attr_val( $value, $vless, $currkey, $currval ) ) {
+ $name = $value = $whole = '';
+ return false;
+ }
+ }
+ }
- return "<$element$attr2$xhtml_slash>";
+ return true;
}
/**
@@ -703,40 +901,40 @@ function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
* input. It will add quotes around attribute values that don't have any quotes
* or apostrophes around them, to make it easier to produce HTML code that will
* conform to W3C's HTML specification. It will also remove bad URL protocols
- * from attribute values. It also reduces duplicate attributes by using the
+ * from attribute values. It also reduces duplicate attributes by using the
* attribute defined first (foo='bar' foo='baz' will result in foo='bar').
*
* @since 1.0.0
*
- * @param string $attr Attribute list from HTML element to closing HTML element tag
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $attr Attribute list from HTML element to closing HTML element tag
+ * @param array $allowed_protocols Allowed protocols to keep
* @return array List of attributes after parsing
*/
function wp_kses_hair($attr, $allowed_protocols) {
- $attrarr = array ();
+ $attrarr = array();
$mode = 0;
$attrname = '';
$uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
- # Loop through the whole attribute list
+ // Loop through the whole attribute list
while (strlen($attr) != 0) {
- $working = 0; # Was the last operation successful?
+ $working = 0; // Was the last operation successful?
switch ($mode) {
- case 0 : # attribute name, href for instance
+ case 0 : // attribute name, href for instance
- if (preg_match('/^([-a-zA-Z]+)/', $attr, $match)) {
+ if ( preg_match('/^([-a-zA-Z:]+)/', $attr, $match ) ) {
$attrname = $match[1];
$working = $mode = 1;
- $attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
+ $attr = preg_replace( '/^[-a-zA-Z:]+/', '', $attr );
}
break;
- case 1 : # equals sign or valueless ("selected")
+ case 1 : // equals sign or valueless ("selected")
- if (preg_match('/^\s*=\s*/', $attr)) # equals sign
+ if (preg_match('/^\s*=\s*/', $attr)) // equals sign
{
$working = 1;
$mode = 2;
@@ -744,11 +942,11 @@ function wp_kses_hair($attr, $allowed_protocols) {
break;
}
- if (preg_match('/^\s+/', $attr)) # valueless
+ if (preg_match('/^\s+/', $attr)) // valueless
{
$working = 1;
$mode = 0;
- if(FALSE === array_key_exists($attrname, $attrarr)) {
+ if(false === array_key_exists($attrname, $attrarr)) {
$attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
}
$attr = preg_replace('/^\s+/', '', $attr);
@@ -756,16 +954,16 @@ function wp_kses_hair($attr, $allowed_protocols) {
break;
- case 2 : # attribute value, a URL after href= for instance
+ case 2 : // attribute value, a URL after href= for instance
if (preg_match('%^"([^"]*)"(\s+|/?$)%', $attr, $match))
- # "value"
+ // "value"
{
$thisval = $match[1];
- if ( in_array($attrname, $uris) )
+ if ( in_array(strtolower($attrname), $uris) )
$thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- if(FALSE === array_key_exists($attrname, $attrarr)) {
+ if(false === array_key_exists($attrname, $attrarr)) {
$attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
}
$working = 1;
@@ -775,13 +973,13 @@ function wp_kses_hair($attr, $allowed_protocols) {
}
if (preg_match("%^'([^']*)'(\s+|/?$)%", $attr, $match))
- # 'value'
+ // 'value'
{
$thisval = $match[1];
- if ( in_array($attrname, $uris) )
+ if ( in_array(strtolower($attrname), $uris) )
$thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- if(FALSE === array_key_exists($attrname, $attrarr)) {
+ if(false === array_key_exists($attrname, $attrarr)) {
$attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname='$thisval'", 'vless' => 'n');
}
$working = 1;
@@ -791,51 +989,154 @@ function wp_kses_hair($attr, $allowed_protocols) {
}
if (preg_match("%^([^\s\"']+)(\s+|/?$)%", $attr, $match))
- # value
+ // value
{
$thisval = $match[1];
- if ( in_array($attrname, $uris) )
+ if ( in_array(strtolower($attrname), $uris) )
$thisval = wp_kses_bad_protocol($thisval, $allowed_protocols);
- if(FALSE === array_key_exists($attrname, $attrarr)) {
+ if(false === array_key_exists($attrname, $attrarr)) {
$attrarr[$attrname] = array ('name' => $attrname, 'value' => $thisval, 'whole' => "$attrname=\"$thisval\"", 'vless' => 'n');
}
- # We add quotes to conform to W3C's HTML spec.
+ // We add quotes to conform to W3C's HTML spec.
$working = 1;
$mode = 0;
$attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
}
break;
- } # switch
+ } // switch
- if ($working == 0) # not well formed, remove and try again
+ if ($working == 0) // not well formed, remove and try again
{
$attr = wp_kses_html_error($attr);
$mode = 0;
}
- } # while
+ } // while
- if ($mode == 1 && FALSE === array_key_exists($attrname, $attrarr))
- # special case, for when the attribute list ends with a valueless
- # attribute like "selected"
+ if ($mode == 1 && false === array_key_exists($attrname, $attrarr))
+ // special case, for when the attribute list ends with a valueless
+ // attribute like "selected"
$attrarr[$attrname] = array ('name' => $attrname, 'value' => '', 'whole' => $attrname, 'vless' => 'y');
return $attrarr;
}
+/**
+ * Finds all attributes of an HTML element.
+ *
+ * Does not modify input. May return "evil" output.
+ *
+ * Based on wp_kses_split2() and wp_kses_attr()
+ *
+ * @since 4.2.3
+ *
+ * @param string $element HTML element/tag
+ * @return array|bool List of attributes found in $element. Returns false on failure.
+ */
+function wp_kses_attr_parse( $element ) {
+ $valid = preg_match('%^(<\s*)(/\s*)?([a-zA-Z0-9]+\s*)([^>]*)(>?)$%', $element, $matches);
+ if ( 1 !== $valid ) {
+ return false;
+ }
+
+ $begin = $matches[1];
+ $slash = $matches[2];
+ $elname = $matches[3];
+ $attr = $matches[4];
+ $end = $matches[5];
+
+ if ( '' !== $slash ) {
+ // Closing elements do not get parsed.
+ return false;
+ }
+
+ // Is there a closing XHTML slash at the end of the attributes?
+ if ( 1 === preg_match( '%\s*/\s*$%', $attr, $matches ) ) {
+ $xhtml_slash = $matches[0];
+ $attr = substr( $attr, 0, -strlen( $xhtml_slash ) );
+ } else {
+ $xhtml_slash = '';
+ }
+
+ // Split it
+ $attrarr = wp_kses_hair_parse( $attr );
+ if ( false === $attrarr ) {
+ return false;
+ }
+
+ // Make sure all input is returned by adding front and back matter.
+ array_unshift( $attrarr, $begin . $slash . $elname );
+ array_push( $attrarr, $xhtml_slash . $end );
+
+ return $attrarr;
+}
+
+/**
+ * Builds an attribute list from string containing attributes.
+ *
+ * Does not modify input. May return "evil" output.
+ * In case of unexpected input, returns false instead of stripping things.
+ *
+ * Based on wp_kses_hair() but does not return a multi-dimensional array.
+ *
+ * @since 4.2.3
+ *
+ * @param string $attr Attribute list from HTML element to closing HTML element tag
+ * @return array|bool List of attributes found in $attr. Returns false on failure.
+ */
+function wp_kses_hair_parse( $attr ) {
+ if ( '' === $attr ) {
+ return array();
+ }
+
+ $regex =
+ '(?:'
+ . '[-a-zA-Z:]+' // Attribute name.
+ . '|'
+ . '\[\[?[^\[\]]+\]\]?' // Shortcode in the name position implies unfiltered_html.
+ . ')'
+ . '(?:' // Attribute value.
+ . '\s*=\s*' // All values begin with '='
+ . '(?:'
+ . '"[^"]*"' // Double-quoted
+ . '|'
+ . "'[^']*'" // Single-quoted
+ . '|'
+ . '[^\s"\']+' // Non-quoted
+ . '(?:\s|$)' // Must have a space
+ . ')'
+ . '|'
+ . '(?:\s|$)' // If attribute has no value, space is required.
+ . ')'
+ . '\s*'; // Trailing space is optional except as mentioned above.
+
+ // Although it is possible to reduce this procedure to a single regexp,
+ // we must run that regexp twice to get exactly the expected result.
+
+ $validation = "%^($regex)+$%";
+ $extraction = "%$regex%";
+
+ if ( 1 === preg_match( $validation, $attr ) ) {
+ preg_match_all( $extraction, $attr, $attrarr );
+ return $attrarr[0];
+ } else {
+ return false;
+ }
+}
+
/**
* Performs different checks for attribute values.
*
* The currently implemented checks are "maxlen", "minlen", "maxval", "minval"
- * and "valueless" with even more checks to come soon.
+ * and "valueless".
*
* @since 1.0.0
*
- * @param string $value Attribute value
- * @param string $vless Whether the value is valueless. Use 'y' or 'n'
- * @param string $checkname What $checkvalue is checking for.
- * @param mixed $checkvalue What constraint the value should pass
+ * @param string $value Attribute value
+ * @param string $vless Whether the value is valueless. Use 'y' or 'n'
+ * @param string $checkname What $checkvalue is checking for.
+ * @param mixed $checkvalue What constraint the value should pass
* @return bool Whether check passes
*/
function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
@@ -843,28 +1144,28 @@ function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
switch (strtolower($checkname)) {
case 'maxlen' :
- # The maxlen check makes sure that the attribute value has a length not
- # greater than the given value. This can be used to avoid Buffer Overflows
- # in WWW clients and various Internet servers.
+ // The maxlen check makes sure that the attribute value has a length not
+ // greater than the given value. This can be used to avoid Buffer Overflows
+ // in WWW clients and various Internet servers.
if (strlen($value) > $checkvalue)
$ok = false;
break;
case 'minlen' :
- # The minlen check makes sure that the attribute value has a length not
- # smaller than the given value.
+ // The minlen check makes sure that the attribute value has a length not
+ // smaller than the given value.
if (strlen($value) < $checkvalue)
$ok = false;
break;
case 'maxval' :
- # The maxval check does two things: it checks that the attribute value is
- # an integer from 0 and up, without an excessive amount of zeroes or
- # whitespace (to avoid Buffer Overflows). It also checks that the attribute
- # value is not greater than the given value.
- # This check can be used to avoid Denial of Service attacks.
+ // The maxval check does two things: it checks that the attribute value is
+ // an integer from 0 and up, without an excessive amount of zeroes or
+ // whitespace (to avoid Buffer Overflows). It also checks that the attribute
+ // value is not greater than the given value.
+ // This check can be used to avoid Denial of Service attacks.
if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
$ok = false;
@@ -873,8 +1174,8 @@ function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
break;
case 'minval' :
- # The minval check checks that the attribute value is a positive integer,
- # and that it is not smaller than the given value.
+ // The minval check makes sure that the attribute value is a positive integer,
+ // and that it is not smaller than the given value.
if (!preg_match('/^\s{0,6}[0-9]{1,6}\s{0,6}$/', $value))
$ok = false;
@@ -883,15 +1184,15 @@ function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
break;
case 'valueless' :
- # The valueless check checks if the attribute has a value
- # (like ) or not (