HTML sanitizer for MediaWiki. More...

Static Public Member Functions
static	attributeWhitelist ($element)
	Fetch the whitelist of acceptable attributes for a given element name. More...

static	checkCss ($value)
	Pick apart some CSS and check it for forbidden or unsafe structures. More...

static	cleanUrl ($url)

static	cleanUrlCallback ($matches)

static	cssDecodeCallback ($matches)

static	decCharReference ($codepoint)

static	decodeChar ($codepoint)
	Return UTF-8 string for a codepoint if that is a valid character reference, otherwise U+FFFD REPLACEMENT CHARACTER. More...

static	decodeCharReferences ($text)
	Decode any character references, numeric or named entities, in the text and return a UTF-8 string. More...

static	decodeCharReferencesAndNormalize ($text)
	Decode any character references, numeric or named entities, in the next and normalize the resulting string. More...

static	decodeCharReferencesCallback ($matches)

static	decodeEntity ($name)
	If the named entity is defined in the HTML 4.0/XHTML 1.0 DTD, return the UTF-8 encoding of that character. More...

static	decodeTagAttributes ($text)
	Return an associative array of attribute names and values from a partial tag string. More...

static	encodeAttribute ($text)
	Encode an attribute value for HTML output. More...

static	escapeClass ($class)
	Given a value, escape it so that it can be used as a CSS class and return it. More...

static	escapeHtmlAllowEntities ($html)
	Given HTML input, escape with htmlspecialchars but un-escape entities. More...

static	escapeId ($id, $options=[])
	Given a value, escape it so that it can be used in an id attribute and return it. More...

static	escapeIdReferenceList ($referenceString, $options=[])
	Given a string containing a space delimited list of ids, escape each id to match ids escaped by the escapeId() function. More...

static	fixTagAttributes ($text, $element)
	Take a tag soup fragment listing an HTML element's attributes and normalize it to well-formed XML, discarding unwanted attributes. More...

static	getAttribsRegex ()
	Regular expression to match HTML/XML attribute pairs within a tag. More...

static	getRecognizedTagData ($extratags=[], $removetags=[])
	Return the various lists of recognized tags. More...

static	hackDocType ()
	Hack up a private DOCTYPE with HTML's standard entity declarations. More...

static	hexCharReference ($codepoint)

static	mergeAttributes ($a, $b)
	Merge two sets of HTML attributes. More...

static	normalizeCharReferences ($text)
	Ensure that any entities and character references are legal for XML and XHTML specifically. More...

static	normalizeCharReferencesCallback ($matches)

static	normalizeCss ($value)
	Normalize CSS into a format we can easily search for hostile input. More...

static	normalizeEntity ($name)
	If the named entity is defined in the HTML 4.0/XHTML 1.0 DTD, return the equivalent numeric entity reference (except for the core < > & "). More...

static	normalizeSectionNameWhitespace ($section)
	Normalizes whitespace in a section name, such as might be returned by Parser::stripSectionName(), for use in the id's that are used for section links. More...

static	removeHTMLcomments ($text)
	Remove '', and everything between. More...

static	removeHTMLtags ($text, $processCallback=null, $args=[], $extratags=[], $removetags=[])
	Cleans up HTML, removes dangerous tags and attributes, and removes HTML comments. More...

static	safeEncodeAttribute ($text)
	Encode an attribute value for HTML tags, with extra armoring against further wiki processing. More...

static	safeEncodeTagAttributes ($assoc_array)
	Build a partial tag string from an associative array of attribute names and values as returned by decodeTagAttributes. More...

static	setupAttributeWhitelist ()
	Foreach array key (an allowed HTML element), return an array of allowed attributes. More...

static	stripAllTags ($text)
	Take a fragment of (potentially invalid) HTML and return a version with any tags removed, encoded as plain text. More...

static	validateAttributes ($attribs, $whitelist)
	Take an array of attribute names and values and normalize or discard illegal values for the given whitelist. More...

static	validateEmail ($addr)
	Does a string look like an e-mail address? More...

static	validateTag ($params, $element)
	Takes attribute names and values for a tag and the tag name and validates that the tag is allowed to be present. More...

static	validateTagAttributes ($attribs, $element)
	Take an array of attribute names and values and normalize or discard illegal values for the given element type. More...

Public Attributes
const	CHAR_REFS_REGEX
	Regular expression to match various types of character references in Sanitizer::normalizeCharReferences and Sanitizer::decodeCharReferences. More...

const	ELEMENT_BITS_REGEX = '!^(/?)([A-Za-z][^\t\n\v />\0]+)([^>]?)(/?>)([^<]*)$!'
	Acceptable tag name charset from HTML5 parsing spec http://www.w3.org/TR/html5/syntax.html#tag-open-state. More...

const	EVIL_URI_PATTERN = '!(^\|\s\|\/\s)(javascript\|vbscript)([^\w]\|$)!i'
	Blacklist for evil uris like javascript: WARNING: DO NOT use this in any place that actually requires blacklisting for security reasons. More...

const	XMLNS_ATTRIBUTE_PATTERN = "/^xmlns:[:A-Z_a-z-.0-9]+$/"

Static Private Member Functions
static	armorLinksCallback ($matches)
	Regex replace callback for armoring links against further processing. More...

static	getTagAttributeCallback ($set)
	Pick the appropriate attribute value from a match set from the attribs regex matches. More...

static	normalizeWhitespace ($text)

static	validateCodepoint ($codepoint)
	Returns true if a given Unicode codepoint is a valid character in both HTML5 and XML. More...

Static Private Attributes
static static static	$attribsRegex
	Lazy-initialised attributes regex, see getAttribsRegex() More...

static	$htmlEntities
	List of all named character entities defined in HTML 4.01 http://www.w3.org/TR/html4/sgml/entities.html As well as ' which is only defined starting in XHTML1. More...

static static	$htmlEntityAliases
	Character entity aliases accepted by MediaWiki. More...

Detailed Description

HTML sanitizer for MediaWiki.

Definition at line 31 of file Sanitizer.php.

Member Function Documentation

static Sanitizer::armorLinksCallback ( $matches )

staticprivate

Regex replace callback for armoring links against further processing.

Parameters

array $matches

Returns: string

Definition at line 1237 of file Sanitizer.php.

References $matches.

static Sanitizer::attributeWhitelist ( $element )

static

Fetch the whitelist of acceptable attributes for a given element name.

Parameters

string $element

Returns: array

Definition at line 1549 of file Sanitizer.php.

References setupAttributeWhitelist().

Referenced by validateTagAttributes().

static Sanitizer::checkCss ( $value )

static

Pick apart some CSS and check it for forbidden or unsafe structures.

Returns a sanitized string. This sanitized string will have character references and escape sequences decoded and comments stripped (unless it is itself one valid comment, in which case the value will be passed through). If the input is just too evil, only a comment complaining about evilness will be returned.

Currently URL references, 'expression', 'tps' are forbidden.

NOTE: Despite the fact that character references are decoded, the returned string may contain character references given certain clever input strings. These character references must be escaped before the return value is embedded in HTML.

Parameters

string $value

Returns: string

Definition at line 969 of file Sanitizer.php.

References $value, and UTF8_REPLACEMENT.

Referenced by CoreParserFunctions\displaytitle(), SanitizerTest\testCssCommentsChecking(), and validateAttributes().

static Sanitizer::cleanUrl ( $url )

static

Parameters

string $url

Returns: mixed|string

Definition at line 1818 of file Sanitizer.php.

References $matches, decodeCharReferences(), and list.

Referenced by Parser\makeFreeExternalLink(), and Parser\replaceExternalLinks().

static Sanitizer::cleanUrlCallback ( $matches )

static

Parameters

array $matches

Returns: string

Definition at line 1872 of file Sanitizer.php.

References $matches.

static Sanitizer::cssDecodeCallback ( $matches )

static

Parameters

array $matches

Returns: string

Definition at line 997 of file Sanitizer.php.

References $matches, and codepointToUtf8().

static Sanitizer::decCharReference ( $codepoint )

static

Parameters

int $codepoint

Returns: null|string

Definition at line 1415 of file Sanitizer.php.

References validateCodepoint().

Referenced by normalizeCharReferencesCallback().

static Sanitizer::decodeChar ( $codepoint )

static

Return UTF-8 string for a codepoint if that is a valid character reference, otherwise U+FFFD REPLACEMENT CHARACTER.

Parameters

int $codepoint

Returns: string

Access:: private

Definition at line 1516 of file Sanitizer.php.

References codepointToUtf8(), UTF8_REPLACEMENT, and validateCodepoint().

Referenced by decodeCharReferencesCallback().

static Sanitizer::decodeCharReferences ( $text )

static

Decode any character references, numeric or named entities, in the text and return a UTF-8 string.

Parameters

string $text

Returns: string

Definition at line 1462 of file Sanitizer.php.

Referenced by IRCColourfulRCFeedFormatter\cleanupForIRC(), cleanUrl(), decodeTagAttributes(), UploadBase\detectScript(), Skin\doEditSectionLink(), escapeHtmlAllowEntities(), escapeId(), WebRequestUpload\getName(), normalizeCss(), ImageCleanup\processRow(), Parser\replaceInternalLinks2(), SanitizerTest\testDecodeMixedComplexEntities(), SanitizerTest\testDecodeMixedEntities(), SanitizerTest\testDecodeNamedEntities(), SanitizerTest\testDecodeNumericEntities(), SanitizerTest\testInvalidAmpersand(), SanitizerTest\testInvalidEntities(), and SanitizerTest\testInvalidNumberedEntities().

static Sanitizer::decodeCharReferencesAndNormalize ( $text )

static

Decode any character references, numeric or named entities, in the next and normalize the resulting string.

(bug 14952)

This is useful for page titles, not for text to be displayed, MediaWiki allows HTML entities to escape normalization as a feature.

Parameters

string $text Already normalized, containing entities

Returns: string Still normalized, without entities

Definition at line 1479 of file Sanitizer.php.

References $count, $wgContLang, and global.

Referenced by Title\newFromTextThrow().

static Sanitizer::decodeCharReferencesCallback ( $matches )

static

Parameters

string $matches

Returns: string

Definition at line 1497 of file Sanitizer.php.

References $matches, decodeChar(), and decodeEntity().

static Sanitizer::decodeEntity ( $name )

static

If the named entity is defined in the HTML 4.0/XHTML 1.0 DTD, return the UTF-8 encoding of that character.

Otherwise, returns pseudo-entity source (eg "&foo;")

Parameters

string $name

Returns: string

Definition at line 1532 of file Sanitizer.php.

References $name, and codepointToUtf8().

Referenced by decodeCharReferencesCallback().

static Sanitizer::decodeTagAttributes ( $text )

static

Return an associative array of attribute names and values from a partial tag string.

Attribute names are forced to lowercase, character references are decoded to UTF-8 text.

Parameters

string $text

Returns: array

Definition at line 1249 of file Sanitizer.php.

References $attribs, $value, as, decodeCharReferences(), and getTagAttributeCallback().

Referenced by LanguageConverter\autoConvert(), CoreParserFunctions\displaytitle(), Parser\extensionSubstitution(), Parser\extractTagsAndParams(), fixTagAttributes(), SanitizerTest\testDecodeTagAttributes(), and validateTag().

static Sanitizer::encodeAttribute ( $text )

static

Encode an attribute value for HTML output.

Parameters

string $text

Returns: string HTML-encoded text fragment

Definition at line 1053 of file Sanitizer.php.

Referenced by Xml\expandAttributes(), and safeEncodeAttribute().

static Sanitizer::escapeClass ( $class )

static

Given a value, escape it so that it can be used as a CSS class and return it.

Todo:: For extra validity, input should be validated UTF-8.

See also: http://www.w3.org/TR/CSS21/syndata.html Valid characters/format

Parameters

string $class

Returns: string

Definition at line 1209 of file Sanitizer.php.

Referenced by ChangeTags\formatSummaryRow(), Title\getEditNotices(), SpecialStatistics\getGroupStats(), ChangesList\getHTMLClasses(), Skin\getPageClasses(), OutputPage\headElement(), ChangesListSpecialPage\makeLegend(), EnhancedChangesList\recentChangesBlockGroup(), EnhancedChangesList\recentChangesBlockLine(), and OldChangesList\recentChangesLine().

static Sanitizer::escapeHtmlAllowEntities ( $html )

static

Given HTML input, escape with htmlspecialchars but un-escape entities.

This allows (generally harmless) entities like   to survive.

Parameters

string $html HTML to escape

Returns: string Escaped input

Definition at line 1224 of file Sanitizer.php.

References $html, and decodeCharReferences().

Referenced by Linker\formatComment(), AllMessagesTablePager\formatValue(), SearchHighlighter\removeWiki(), and SanitizerTest\testEscapeHtmlAllowEntities().

static Sanitizer::escapeId	(	$id,
		$options = `[]`
	)

static

Given a value, escape it so that it can be used in an id attribute and return it.

This will use HTML5 validation if $wgExperimentalHtmlIds is true, allowing anything but ASCII whitespace. Otherwise it will use HTML 4 rules, which means a narrow subset of ASCII, with bad characters escaped with lots of dots.

To ensure we don't have to bother escaping anything, we also strip ', ", & even if $wgExperimentalIds is true. TODO: Is this the best tactic? We also strip # because it upsets IE, and % because it could be ambiguous if it's part of something that looks like a percent escape (which don't work reliably in fragments cross-browser).

See also: http://www.w3.org/TR/html401/types.html#type-name Valid characters in the id and name attributes; http://www.w3.org/TR/html401/struct/links.html#h-12.2.3 Anchors with the id attribute; http://www.whatwg.org/html/elements.html#the-id-attribute HTML5 definition of id attribute

Parameters

string	$id	Id to escape
string \| array	$options	String or array of strings (default is array()): 'noninitial': This is a non-initial fragment of an id, not a full id, so don't pay attention if the first character isn't valid at the beginning of an id. Only matters if $wgExperimentalHtmlIds is false. 'legacy': Behave the way the old HTML 4-based ID escaping worked even if $wgExperimentalHtmlIds is used, so we can generate extra anchors and links won't break.

Returns: string

Definition at line 1132 of file Sanitizer.php.

References $options, $wgExperimentalHtmlIds, array(), decodeCharReferences(), and global.

Referenced by HTMLFormField\__construct(), Skin\addToSidebarPlain(), HTMLFormFieldCloner\createFieldsForKey(), HTMLForm\displaySection(), Title\escapeFragmentForURL(), escapeIdReferenceList(), SpecialListGrants\execute(), SpecialListGroupRights\execute(), Parser\formatHeadings(), HTMLRadioField\formatOptions(), OOUIHTMLForm\formatSection(), HTMLForm\formatSection(), SpecialVersion\getCreditsForExtension(), BaseTemplate\getIndicators(), HTMLFormFieldCloner\getInputHTML(), HTMLFormFieldCloner\getInputHTMLForKey(), AllMessagesTablePager\getRowAttrs(), Parser\guessLegacySectionNameFromWikiText(), Parser\guessSectionNameFromWikiText(), InfoAction\makeHeader(), ImagePage\makeMetadataTable(), ApiMain\modifyHelp(), SanitizerTest\testEscapeIdReferenceList(), and validateAttributes().

static Sanitizer::escapeIdReferenceList	(	$referenceString,
		$options = `[]`
	)

static

Given a string containing a space delimited list of ids, escape each id to match ids escaped by the escapeId() function.

Since: 1.27

Parameters

string	$referenceString	Space delimited list of ids
string \| array	$options	String or array of strings (default is array()): 'noninitial': This is a non-initial fragment of an id, not a full id, so don't pay attention if the first character isn't valid at the beginning of an id. Only matters if $wgExperimentalHtmlIds is false. 'legacy': Behave the way the old HTML 4-based ID escaping worked even if $wgExperimentalHtmlIds is used, so we can generate extra anchors and links won't break.

Returns: string

Definition at line 1182 of file Sanitizer.php.

References $options, as, and escapeId().

Referenced by SanitizerTest\testEscapeIdReferenceList(), and validateAttributes().

static Sanitizer::fixTagAttributes	(	$text,
		$element
	)

static

Take a tag soup fragment listing an HTML element's attributes and normalize it to well-formed XML, discarding unwanted attributes.

Output is safe for further wikitext processing, with escaping of values that could trigger problems.

Normalizes attribute names to lowercase
Discards attributes not on a whitelist for the given element
Turns broken or invalid entities into plaintext
Double-quotes all attribute values
Attributes without values are given the name as attribute
Double attributes are discarded
Unsafe style attributes are discarded
Prepends space if there are attributes.

Parameters

string	$text
string	$element

Returns: string

Definition at line 1037 of file Sanitizer.php.

References decodeTagAttributes(), safeEncodeTagAttributes(), and validateTagAttributes().

Referenced by Parser\doTableStuff(), removeHTMLtags(), and SanitizerTest\testDeprecatedAttributesUnaltered().

static Sanitizer::getAttribsRegex ( )

static

Regular expression to match HTML/XML attribute pairs within a tag.

Allows some... latitude. Based on, http://www.w3.org/TR/html5/syntax.html#before-attribute-value-state Used in Sanitizer::fixTagAttributes and Sanitizer::decodeTagAttributes

Returns: string

Definition at line 340 of file Sanitizer.php.

static Sanitizer::getRecognizedTagData	(	$extratags = `[]`,
		$removetags = `[]`
	)

static

Return the various lists of recognized tags.

Parameters

array	$extratags	For any extra tags to include
array	$removetags	For any tags (default or extra) to exclude

Returns: array

Definition at line 365 of file Sanitizer.php.

References $vars, as, by, global, in, list, table, that, used, and will.

Referenced by ResourceLoaderJqueryMsgModule\getScript().

static Sanitizer::getTagAttributeCallback ( $set )

staticprivate

Pick the appropriate attribute value from a match set from the attribs regex matches.

Parameters

array $set

Exceptions

MWException When tag conditions are not met.

Returns: string

Definition at line 1304 of file Sanitizer.php.

Referenced by decodeTagAttributes().

static Sanitizer::hackDocType ( )

static

Hack up a private DOCTYPE with HTML's standard entity declarations.

PHP 4 seemed to know these if you gave it an HTML doctype, but PHP 5.1 doesn't.

Use for passing XHTML fragments to PHP's XML parsing functions

Returns: string

Definition at line 1805 of file Sanitizer.php.

References $out, and as.

Referenced by Xml\isWellFormedXmlFragment(), and ParserTest\wellFormed().

static Sanitizer::hexCharReference ( $codepoint )

static

Parameters

int $codepoint

Returns: null|string

Definition at line 1428 of file Sanitizer.php.

References validateCodepoint().

Referenced by normalizeCharReferencesCallback().

static Sanitizer::mergeAttributes	(	$a,
		$b
	)

static

Merge two sets of HTML attributes.

Conflicting items in the second set will override those in the first, except for 'class' attributes which will be combined (if they're both strings).

Todo:

implement merging for other attributes such as style

Parameters

array	$a
array	$b

Returns: array

Definition at line 839 of file Sanitizer.php.

References $out.

Referenced by Linker\linkAttribs(), and TraditionalImageGallery\toHTML().

static Sanitizer::normalizeCharReferences ( $text )

static

Ensure that any entities and character references are legal for XML and XHTML specifically.

Any stray bits will be &-escaped to result in a valid text fragment.

a. named char refs can only be < > & ", others are numericized (this way we're well-formed even without a DTD) b. any numeric char refs must be legal chars, not invalid or forbidden c. use lower cased "&#x", not "&#X" d. fix or reject non-valid attributes

Parameters

string $text

Returns: string

Access:: private

Definition at line 1362 of file Sanitizer.php.

Referenced by CoreParserFunctions\displaytitle(), Parser\internalParseHalfParsed(), and OutputPage\setPageTitle().

static Sanitizer::normalizeCharReferencesCallback ( $matches )

static

Parameters

string $matches

Returns: string

Definition at line 1373 of file Sanitizer.php.

References $matches, $ret, decCharReference(), hexCharReference(), and normalizeEntity().

static Sanitizer::normalizeCss ( $value )

static

Normalize CSS into a format we can easily search for hostile input.

decode character references
decode escape sequences
convert characters that IE6 interprets into ascii
remove comments, unless the entire value is one single comment
Parameters

string $value the css string

Returns
string normalized css

Definition at line 861 of file Sanitizer.php.

References $matches, $value, decodeCharReferences(), StringUtils\delimiterReplace(), and utf8ToCodepoint().

Referenced by UploadBase\checkSvgScriptCallback().

static Sanitizer::normalizeEntity ( $name )

static

If the named entity is defined in the HTML 4.0/XHTML 1.0 DTD, return the equivalent numeric entity reference (except for the core < > & ").

If the entity is a MediaWiki-specific alias, returns the HTML equivalent. Otherwise, returns HTML-escaped text of pseudo-entity source (eg &foo;)

Parameters

string $name

Returns: string

Definition at line 1399 of file Sanitizer.php.

References $name.

Referenced by normalizeCharReferencesCallback().

static Sanitizer::normalizeSectionNameWhitespace ( $section )

static

Normalizes whitespace in a section name, such as might be returned by Parser::stripSectionName(), for use in the id's that are used for section links.

Parameters

string $section

Returns: string

Definition at line 1343 of file Sanitizer.php.

References $section.

Referenced by ApiFeedWatchlist\createFeedItem(), Linker\formatAutocomments(), Parser\formatHeadings(), Parser\guessLegacySectionNameFromWikiText(), and Parser\guessSectionNameFromWikiText().

static Sanitizer::normalizeWhitespace ( $text )

staticprivate

Parameters

string $text

Returns: string

Definition at line 1328 of file Sanitizer.php.

static Sanitizer::removeHTMLcomments ( $text )

static

Remove '', and everything between.

To avoid leaving blank lines, when a comment is both preceded and followed by a newline (ignoring spaces), trim leading and trailing spaces and one of the newlines.

Parameters

string $text

Returns: string

Definition at line 634 of file Sanitizer.php.

Referenced by removeHTMLtags().

static Sanitizer::removeHTMLtags	(	$text,
		$processCallback = `null`,
		$args = `[]`,
		$extratags = `[]`,
		$removetags = `[]`
	)

static

Cleans up HTML, removes dangerous tags and attributes, and removes HTML comments.

Parameters

string	$text
callable	$processCallback	Callback to do any variable or parameter replacements in HTML attribute values
array \| bool	$args	Arguments for the processing callback
array	$extratags	For any extra tags to include
array	$removetags	For any tags (default or extra) to exclude

Returns: string

Definition at line 455 of file Sanitizer.php.

References $args, $params, $t, as, fixTagAttributes(), MWTidy\isEnabled(), list, removeHTMLcomments(), and validateTag().

Referenced by CoreParserFunctions\displaytitle(), Parser\internalParse(), OutputPage\setPageTitle(), SanitizerTest\testRemoveHTMLtags(), SanitizerTest\testRemovehtmltagsOnHtml5Tags(), and Parser\testSrvus().

static Sanitizer::safeEncodeAttribute ( $text )

static

Encode an attribute value for HTML tags, with extra armoring against further wiki processing.

Parameters

string $text

Returns: string HTML-encoded text fragment

Definition at line 1074 of file Sanitizer.php.

References encodeAttribute(), and wfUrlProtocols().

Referenced by safeEncodeTagAttributes().

static Sanitizer::safeEncodeTagAttributes ( $assoc_array )

static

Build a partial tag string from an associative array of attribute names and values as returned by decodeTagAttributes.

Parameters

array $assoc_array

Returns: string

Definition at line 1285 of file Sanitizer.php.

References $attribs, $value, as, and safeEncodeAttribute().

Referenced by CoreParserFunctions\displaytitle(), and fixTagAttributes().

static Sanitizer::setupAttributeWhitelist ( )

static

Foreach array key (an allowed HTML element), return an array of allowed attributes.

Returns: array

Definition at line 1561 of file Sanitizer.php.

References array().

Referenced by attributeWhitelist().

static Sanitizer::stripAllTags ( $text )

static

Take a fragment of (potentially invalid) HTML and return a version with any tags removed, encoded as plain text.

Warning: this return value must be further escaped for literal inclusion in HTML output as of 1.10!

Parameters

string $text HTML fragment

Returns: string

Definition at line 1785 of file Sanitizer.php.

References StringUtils\delimiterReplace().

Referenced by MWDebug\appendDebugInfoToApiResult(), CoreParserFunctions\displaytitle(), OutputPage\setPageTitle(), and Parser\stripAltText().

static Sanitizer::validateAttributes	(	$attribs,
		$whitelist
	)

static

Take an array of attribute names and values and normalize or discard illegal values for the given whitelist.

Discards attributes not on the given whitelist
Unsafe style attributes are discarded
Invalid id attributes are re-encoded

Parameters

array	$attribs
array	$whitelist	List of allowed attribute names

Returns: array

Todo:

Check for legal values where the DTD limits things.

Check for unique id attribute :P

Definition at line 736 of file Sanitizer.php.

References $attribs, $out, $value, as, checkCss(), escapeId(), escapeIdReferenceList(), and wfUrlProtocols().

Referenced by validateTagAttributes().

static Sanitizer::validateCodepoint ( $codepoint )

staticprivate

Returns true if a given Unicode codepoint is a valid character in both HTML5 and XML.

Parameters

int $codepoint

Returns: bool

Definition at line 1443 of file Sanitizer.php.

Referenced by decCharReference(), decodeChar(), and hexCharReference().

static Sanitizer::validateEmail ( $addr )

static

Does a string look like an e-mail address?

This validates an email address using an HTML5 specification found at: http://www.whatwg.org/html/states-of-the-type-attribute.html#valid-e-mail-address Which as of 2011-01-24 says:

A valid e-mail address is a string that matches the ABNF production 1*( atext / "." ) "@" ldh-str *( "." ldh-str ) where atext is defined in RFC 5322 section 3.2.3, and ldh-str is defined in RFC 1034 section 3.5.

This function is an implementation of the specification as requested in bug 22449.

Client-side forms will use the same standard validation rules via JS or HTML 5 validation; additional restrictions can be enforced server-side by extensions via the 'isValidEmailAddr' hook.

Note that this validation doesn't 100% match RFC 2822, but is believed to be liberal enough for wide use. Some invalid addresses will still pass validation here.

Since: 1.18

Parameters

string $addr E-mail address

Returns: bool

Definition at line 1904 of file Sanitizer.php.

References Hooks\run().

Referenced by SpecialChangeEmail\attemptChange(), Autopromote\checkCondition(), SanitizerValidateEmailTest\checkEmail(), RemoveInvalidEmails\execute(), ResetUserEmail\execute(), EmailConfirmation\execute(), PasswordReset\execute(), LoginSignupSpecialPage\getFieldDefinitions(), User\isEmailConfirmed(), MediaWiki\Auth\UserDataAuthenticationRequest\populateUser(), and WebInstallerName\submit().

static Sanitizer::validateTag	(	$params,
		$element
	)

static

Takes attribute names and values for a tag and the tag name and validates that the tag is allowed to be present.

This DOES NOT validate the attributes, nor does it validate the tags themselves. This method only handles the special circumstances where we may want to allow a tag within content but ONLY when it has specific attributes set.

Parameters

string	$params
string	$element

Returns: bool

Definition at line 680 of file Sanitizer.php.

References $params, and decodeTagAttributes().

Referenced by removeHTMLtags().

static Sanitizer::validateTagAttributes	(	$attribs,
		$element
	)

static

Take an array of attribute names and values and normalize or discard illegal values for the given element type.

Discards attributes not on a whitelist for the given element
Unsafe style attributes are discarded
Invalid id attributes are re-encoded

Parameters

array	$attribs
string	$element

Returns: array

Todo:

Check for legal values where the DTD limits things.

Check for unique id attribute :P

Definition at line 716 of file Sanitizer.php.

References $attribs, attributeWhitelist(), and validateAttributes().

Referenced by fixTagAttributes(), CoreTagHooks\pre(), and Parser\renderImageGallery().

Member Data Documentation

static static Sanitizer::$attribsRegex

staticprivate

Initial value:

=> 'rlm',

]

Lazy-initialised attributes regex, see getAttribsRegex()

Definition at line 325 of file Sanitizer.php.

Sanitizer::$htmlEntities

staticprivate

Initial value:

= [

'Aacute' => 193

List of all named character entities defined in HTML 4.01 http://www.w3.org/TR/html4/sgml/entities.html As well as ' which is only defined starting in XHTML1.

Definition at line 64 of file Sanitizer.php.

static Sanitizer::$htmlEntityAliases

staticprivate

Initial value:

= [

'רלמ' => 'rlm'

Character entity aliases accepted by MediaWiki.

Definition at line 323 of file Sanitizer.php.

const Sanitizer::CHAR_REFS_REGEX

Initial value:

=
        '/&([A-Za-z0-9\x80-\xff]+);
         |&\#([0-9]+);
         |&\#[xX]([0-9A-Fa-f]+);
         |(&)/x'

Regular expression to match various types of character references in Sanitizer::normalizeCharReferences and Sanitizer::decodeCharReferences.

Definition at line 36 of file Sanitizer.php.

const Sanitizer::ELEMENT_BITS_REGEX = '!^(/?)([A-Za-z][^\t\n\v />\0]*+)([^>]*?)(/?>)([^<]*)$!'

Acceptable tag name charset from HTML5 parsing spec http://www.w3.org/TR/html5/syntax.html#tag-open-state.

Definition at line 46 of file Sanitizer.php.

const Sanitizer::EVIL_URI_PATTERN = '!(^|\s|\*/\s*)(javascript|vbscript)([^\w]|$)!i'

Blacklist for evil uris like javascript: WARNING: DO NOT use this in any place that actually requires blacklisting for security reasons.

There are NUMEROUS1 ways to bypass blacklisting, the only way to be secure from javascript: uri based xss vectors is to whitelist things that you know are safe and deny everything else.

Definition at line 56 of file Sanitizer.php.

const Sanitizer::XMLNS_ATTRIBUTE_PATTERN = "/^xmlns:[:A-Z_a-z-.0-9]+$/"

Definition at line 57 of file Sanitizer.php.

The documentation for this class was generated from the following file:

includes/Sanitizer.php

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