X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/7f1521bf193b382565eb753043c161f4cb3fcda7..16e7b37c7914d753890c1a05a9335f3b43751eb8:/wp-includes/kses.php

diff --git a/wp-includes/kses.php b/wp-includes/kses.php
index ba96b089..4745d8d7 100644
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -34,8 +34,9 @@
 /**
  * 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.
+ * The {@see '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()
  *
@@ -97,6 +98,9 @@ if ( ! CUSTOM_TAGS ) {
 			'src' => true,
 		),
 		'b' => array(),
+		'bdo' => array(
+			'dir' => true,
+		),
 		'big' => array(),
 		'blockquote' => array(
 			'cite' => true,
@@ -395,6 +399,7 @@ if ( ! CUSTOM_TAGS ) {
 		'ol' => array(
 			'start' => true,
 			'type' => true,
+			'reversed' => true,
 		),
 		'var' => array(),
 		'video' => array(
@@ -513,28 +518,106 @@ 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() ) {
 	if ( empty( $allowed_protocols ) )
 		$allowed_protocols = wp_allowed_protocols();
-	$string = wp_kses_no_null($string);
-	$string = wp_kses_js_entities($string);
+	$string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
 	$string = wp_kses_normalize_entities($string);
 	$string = wp_kses_hook($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' ) );
+	
+	// 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
  *
- * @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.
+ * @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 = '' ) {
@@ -542,7 +625,7 @@ function wp_kses_allowed_html( $context = '' ) {
 
 	if ( is_array( $context ) ) {
 		/**
-		 * Filter HTML elements allowed for a given context.
+		 * Filters HTML elements allowed for a given context.
 		 *
 		 * @since 3.5.0
 		 *
@@ -583,19 +666,19 @@ function wp_kses_allowed_html( $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 receive a string.
+ * There is currently only one kses WordPress hook, {@see 'pre_kses'}, and it is called here.
+ * All 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
- * @return string Filtered content through 'pre_kses' hook
+ * @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 {@see 'pre_kses'} hook.
  */
 function wp_kses_hook( $string, $allowed_html, $allowed_protocols ) {
 	/**
-	 * Filter content to be run through kses.
+	 * Filters content to be run through kses.
 	 *
 	 * @since 2.3.0
 	 *
@@ -603,8 +686,7 @@ function wp_kses_hook( $string, $allowed_html, $allowed_protocols ) {
 	 * @param array  $allowed_html      Allowed HTML elements.
 	 * @param array  $allowed_protocols Allowed protocol in links.
 	 */
-	$string = apply_filters( 'pre_kses', $string, $allowed_html, $allowed_protocols );
-	return $string;
+	return apply_filters( 'pre_kses', $string, $allowed_html, $allowed_protocols );
 }
 
 /**
@@ -625,9 +707,12 @@ 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 ) {
@@ -642,6 +727,11 @@ function wp_kses_split( $string, $allowed_html, $allowed_protocols ) {
  *
  * @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;
@@ -663,9 +753,9 @@ function _wp_kses_split_callback( $match ) {
  * @access private
  * @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
+ * @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, $allowed_protocols) {
@@ -689,7 +779,7 @@ function wp_kses_split2($string, $allowed_html, $allowed_protocols) {
 	}
 	// Allow HTML comments
 
-	if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches))
+	if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9-]+)([^>]*)>?$%', $string, $matches))
 		return '';
 	// It's seriously malformed
 
@@ -722,18 +812,17 @@ 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))
 		$xhtml_slash = ' /';
@@ -748,50 +837,63 @@ function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
 	// Go through $attrarr, and save the allowed attributes for this element
 	// in $attr2
 	$attr2 = '';
+	foreach ( $attrarr as $arreach ) {
+		if ( wp_kses_attr_check( $arreach['name'], $arreach['value'], $arreach['whole'], $arreach['vless'], $element, $allowed_html ) ) {
+			$attr2 .= ' '.$arreach['whole'];
+		}
+	}
 
-	$allowed_attr = $allowed_html[strtolower($element)];
-	foreach ($attrarr as $arreach) {
-		if ( ! isset( $allowed_attr[strtolower($arreach['name'])] ) )
-			continue; // the attribute is not allowed
+	// Remove any "<" or ">" characters
+	$attr2 = preg_replace('/[<>]/', '', $attr2);
 
-		$current = $allowed_attr[strtolower($arreach['name'])];
-		if ( $current == '' )
-			continue; // the attribute is not allowed
+	return "<$element$attr2$xhtml_slash>";
+}
+
+/**
+ * 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 )];
 
-		if ( strtolower( $arreach['name'] ) == 'style' ) {
-			$orig_value = $arreach['value'];
-			$value = safecss_filter_attr( $orig_value );
+	$name_low = strtolower( $name );
+	if ( ! isset( $allowed_attr[$name_low] ) || '' == $allowed_attr[$name_low] ) {
+		$name = $value = $whole = '';
+		return false;
+	}
 
-			if ( empty( $value ) )
-				continue;
+	if ( 'style' == $name_low ) {
+		$new_value = safecss_filter_attr( $value );
 
-			$arreach['value'] = $value;
-			$arreach['whole'] = str_replace( $orig_value, $value, $arreach['whole'] );
+		if ( empty( $new_value ) ) {
+			$name = $value = $whole = '';
+			return false;
 		}
 
-		if ( ! is_array($current) ) {
-			$attr2 .= ' '.$arreach['whole'];
-		// there are no checks
+		$whole = str_replace( $value, $new_value, $whole );
+		$value = $new_value;
+	}
 
-		} 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 ( 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;
 			}
+		}
+	}
 
-			if ( $ok )
-				$attr2 .= ' '.$arreach['whole']; // it passed them
-		} // if !is_array($current)
-	} // foreach
-
-	// Remove any "<" or ">" characters
-	$attr2 = preg_replace('/[<>]/', '', $attr2);
-
-	return "<$element$attr2$xhtml_slash>";
+	return true;
 }
 
 /**
@@ -807,8 +909,8 @@ function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
  *
  * @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, $allowed_protocols) {
@@ -923,6 +1025,109 @@ function wp_kses_hair($attr, $allowed_protocols) {
 	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 $attrarr[0];
+	} else {
+		return false;
+	}
+}
+
 /**
  * Performs different checks for attribute values.
  *
@@ -931,10 +1136,10 @@ function wp_kses_hair($attr, $allowed_protocols) {
  *
  * @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, $checkvalue) {
@@ -1005,8 +1210,8 @@ function wp_kses_check_attr_val($value, $vless, $checkname, $checkvalue) {
  *
  * @since 1.0.0
  *
- * @param string $string Content to filter bad protocols from
- * @param array $allowed_protocols Allowed protocols to keep
+ * @param string $string            Content to filter bad protocols from
+ * @param array  $allowed_protocols Allowed protocols to keep
  * @return string Filtered content
  */
 function wp_kses_bad_protocol($string, $allowed_protocols) {
@@ -1032,11 +1237,18 @@ function wp_kses_bad_protocol($string, $allowed_protocols) {
  * @since 1.0.0
  *
  * @param string $string
+ * @param array $options Set 'slash_zero' => 'keep' when '\0' is allowed. Default is 'remove'.
  * @return string
  */
-function wp_kses_no_null($string) {
-	$string = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F]/', '', $string);
-	$string = preg_replace('/(\\\\0)+/', '', $string);
+function wp_kses_no_null( $string, $options = null ) {
+	if ( ! isset( $options['slash_zero'] ) ) {
+		$options = array( 'slash_zero' => 'remove' );
+	}
+
+	$string = preg_replace( '/[\x00-\x08\x0B\x0C\x0E-\x1F]/', '', $string );
+	if ( 'remove' == $options['slash_zero'] ) {
+		$string = preg_replace( '/\\\\+0+/', '', $string );
+	}
 
 	return $string;
 }
@@ -1081,18 +1293,6 @@ function wp_kses_array_lc($inarray) {
 	return $outarray;
 }
 
-/**
- * Removes the HTML JavaScript entities found in early versions of Netscape 4.
- *
- * @since 1.0.0
- *
- * @param string $string
- * @return string
- */
-function wp_kses_js_entities($string) {
-	return preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
-}
-
 /**
  * Handles parsing errors in wp_kses_hair().
  *
@@ -1116,7 +1316,7 @@ function wp_kses_html_error($string) {
  *
  * @since 1.0.0
  *
- * @param string $string Content to check for bad protocols
+ * @param string $string            Content to check for bad protocols
  * @param string $allowed_protocols Allowed protocols
  * @return string Sanitized content
  */
@@ -1147,7 +1347,7 @@ function wp_kses_bad_protocol_once($string, $allowed_protocols, $count = 1 ) {
  * @access private
  * @since 1.0.0
  *
- * @param string $string URI scheme to check against the whitelist
+ * @param string $string            URI scheme to check against the whitelist
  * @param string $allowed_protocols Allowed protocols
  * @return string Sanitized content
  */
@@ -1183,11 +1383,9 @@ function wp_kses_bad_protocol_once2( $string, $allowed_protocols ) {
  */
 function wp_kses_normalize_entities($string) {
 	// Disarm all entities by converting & to &amp;
-
 	$string = str_replace('&', '&amp;', $string);
 
 	// Change back the allowed entities in our entity whitelist
-
 	$string = preg_replace_callback('/&amp;([A-Za-z]{2,8}[0-9]{0,2});/', 'wp_kses_named_entities', $string);
 	$string = preg_replace_callback('/&amp;#(0*[0-9]{1,7});/', 'wp_kses_normalize_entities2', $string);
 	$string = preg_replace_callback('/&amp;#[Xx](0*[0-9A-Fa-f]{1,6});/', 'wp_kses_normalize_entities3', $string);
@@ -1203,6 +1401,8 @@ function wp_kses_normalize_entities($string) {
  *
  * @since 3.0.0
  *
+ * @global array $allowedentitynames
+ *
  * @param array $matches preg_replace_callback() matches array
  * @return string Correctly encoded entity
  */
@@ -1213,13 +1413,13 @@ function wp_kses_named_entities($matches) {
 		return '';
 
 	$i = $matches[1];
-	return ( ( ! in_array($i, $allowedentitynames) ) ? "&amp;$i;" : "&$i;" );
+	return ( ! in_array( $i, $allowedentitynames ) ) ? "&amp;$i;" : "&$i;";
 }
 
 /**
  * Callback for wp_kses_normalize_entities() regular expression.
  *
- * This function helps {@see wp_kses_normalize_entities()} to only accept 16-bit
+ * This function helps wp_kses_normalize_entities() to only accept 16-bit
  * values and nothing more for `&#number;` entities.
  *
  * @access private
@@ -1259,7 +1459,7 @@ function wp_kses_normalize_entities3($matches) {
 		return '';
 
 	$hexchars = $matches[1];
-	return ( ( ! valid_unicode(hexdec($hexchars)) ) ? "&amp;#x$hexchars;" : '&#x'.ltrim($hexchars,'0').';' );
+	return ( ! valid_unicode( hexdec( $hexchars ) ) ) ? "&amp;#x$hexchars;" : '&#x'.ltrim($hexchars,'0').';';
 }
 
 /**
@@ -1335,7 +1535,7 @@ function wp_filter_kses( $data ) {
  * @return string Filtered content
  */
 function wp_kses_data( $data ) {
-	return wp_kses( $data , current_filter() );
+	return wp_kses( $data, current_filter() );
 }
 
 /**
@@ -1349,8 +1549,8 @@ function wp_kses_data( $data ) {
  * @param string $data Post content to filter, expected to be escaped with slashes
  * @return string Filtered post content with allowed HTML tags and attributes intact.
  */
-function wp_filter_post_kses($data) {
-	return addslashes ( wp_kses( stripslashes( $data ), 'post' ) );
+function wp_filter_post_kses( $data ) {
+	return addslashes( wp_kses( stripslashes( $data ), 'post' ) );
 }
 
 /**
@@ -1364,8 +1564,23 @@ function wp_filter_post_kses($data) {
  * @param string $data Post content to filter
  * @return string Filtered post content with allowed HTML tags and attributes intact.
  */
-function wp_kses_post($data) {
-	return wp_kses( $data , 'post' );
+function wp_kses_post( $data ) {
+	return wp_kses( $data, 'post' );
+}
+
+/**
+ * Navigates through an array, object, or scalar, and sanitizes content for
+ * allowed HTML tags for post content.
+ *
+ * @since 4.4.2
+ *
+ * @see map_deep()
+ *
+ * @param mixed $data The array, object, or scalar value to inspect.
+ * @return mixed The filtered content.
+ */
+function wp_kses_post_deep( $data ) {
+	return map_deep( $data, 'wp_kses_post' );
 }
 
 /**
@@ -1377,7 +1592,7 @@ function wp_kses_post($data) {
  * @return string Filtered content without any HTML
  */
 function wp_filter_nohtml_kses( $data ) {
-	return addslashes ( wp_kses( stripslashes( $data ), 'strip' ) );
+	return addslashes( wp_kses( stripslashes( $data ), 'strip' ) );
 }
 
 /**
@@ -1413,8 +1628,8 @@ function kses_init_filters() {
  * A quick procedural method to removing all of the filters that kses uses for
  * content in WordPress Loop.
  *
- * Does not remove the kses_init() function from 'init' hook (priority is
- * default). Also does not remove kses_init() function from 'set_current_user'
+ * Does not remove the kses_init() function from {@see 'init'} hook (priority is
+ * default). Also does not remove kses_init() function from {@see 'set_current_user'}
  * hook (priority is also default).
  *
  * @since 2.0.6
@@ -1436,8 +1651,8 @@ function kses_remove_filters() {
 /**
  * Sets up most of the Kses filters for input form content.
  *
- * If you remove the kses_init() function from 'init' hook and
- * 'set_current_user' (priority is default), then none of the Kses filter hooks
+ * If you remove the kses_init() function from {@see 'init'} hook and
+ * {@see 'set_current_user'} (priority is default), then none of the Kses filter hooks
  * will be added.
  *
  * First removes all of the Kses filters in case the current user does not need
@@ -1449,14 +1664,19 @@ function kses_remove_filters() {
 function kses_init() {
 	kses_remove_filters();
 
-	if (current_user_can('unfiltered_html') == false)
+	if ( ! current_user_can( 'unfiltered_html' ) ) {
 		kses_init_filters();
+	}
 }
 
 /**
  * Inline CSS filter
  *
  * @since 2.8.1
+ *
+ * @param string $css        A string of CSS rules.
+ * @param string $deprecated Not used.
+ * @return string            Filtered string of CSS rules.
  */
 function safecss_filter_attr( $css, $deprecated = '' ) {
 	if ( !empty( $deprecated ) )
@@ -1471,23 +1691,84 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 	$css_array = explode( ';', trim( $css ) );
 
 	/**
-	 * Filter list of allowed CSS attributes.
+	 * Filters list of allowed CSS attributes.
 	 *
 	 * @since 2.8.1
+	 * @since 4.4.0 Added support for `min-height`, `max-height`, `min-width`, and `max-width`.
+	 * @since 4.6.0 Added support for `list-style-type`.
 	 *
 	 * @param array $attr List of allowed CSS attributes.
 	 */
-	$allowed_attr = apply_filters( 'safe_style_css', array( 'text-align', 'margin', 'color', 'float',
-	'border', 'background', 'background-color', 'border-bottom', 'border-bottom-color',
-	'border-bottom-style', 'border-bottom-width', 'border-collapse', 'border-color', 'border-left',
-	'border-left-color', 'border-left-style', 'border-left-width', 'border-right', 'border-right-color',
-	'border-right-style', 'border-right-width', 'border-spacing', 'border-style', 'border-top',
-	'border-top-color', 'border-top-style', 'border-top-width', 'border-width', 'caption-side',
-	'clear', 'cursor', 'direction', 'font', 'font-family', 'font-size', 'font-style',
-	'font-variant', 'font-weight', 'height', 'letter-spacing', 'line-height', 'margin-bottom',
-	'margin-left', 'margin-right', 'margin-top', 'overflow', 'padding', 'padding-bottom',
-	'padding-left', 'padding-right', 'padding-top', 'text-decoration', 'text-indent', 'vertical-align',
-	'width' ) );
+	$allowed_attr = apply_filters( 'safe_style_css', array(
+		'background',
+		'background-color',
+
+		'border',
+		'border-width',
+		'border-color',
+		'border-style',
+		'border-right',
+		'border-right-color',
+		'border-right-style',
+		'border-right-width',
+		'border-bottom',
+		'border-bottom-color',
+		'border-bottom-style',
+		'border-bottom-width',
+		'border-left',
+		'border-left-color',
+		'border-left-style',
+		'border-left-width',
+		'border-top',
+		'border-top-color',
+		'border-top-style',
+		'border-top-width',
+
+		'border-spacing',
+		'border-collapse',
+		'caption-side',
+
+		'color',
+		'font',
+		'font-family',
+		'font-size',
+		'font-style',
+		'font-variant',
+		'font-weight',
+		'letter-spacing',
+		'line-height',
+		'text-decoration',
+		'text-indent',
+		'text-align',
+
+		'height',
+		'min-height',
+		'max-height',
+
+		'width',
+		'min-width',
+		'max-width',
+
+		'margin',
+		'margin-right',
+		'margin-bottom',
+		'margin-left',
+		'margin-top',
+
+		'padding',
+		'padding-right',
+		'padding-bottom',
+		'padding-left',
+		'padding-top',
+
+		'clear',
+		'cursor',
+		'direction',
+		'float',
+		'overflow',
+		'vertical-align',
+		'list-style-type',
+	) );
 
 	if ( empty($allowed_attr) )
 		return $css;