'classname',
'id' => 'id',
'style' => 'color: red;',
'style' => 'color: red',
'style' => 'color: red; text-align:center',
'style' => 'color: red; text-align:center;',
'title' => 'title',
);
foreach ( $attributes as $name => $value ) {
$string = "1 WordPress Avenue, The Internet.";
$expect_string = "1 WordPress Avenue, The Internet.";
$this->assertEquals( $expect_string, wp_kses( $string, $allowedposttags ) );
}
}
/**
* @ticket 20210
*/
function test_wp_filter_post_kses_a() {
global $allowedposttags;
$attributes = array(
'class' => 'classname',
'id' => 'id',
'style' => 'color: red;',
'title' => 'title',
'href' => 'http://example.com',
'rel' => 'related',
'rev' => 'revision',
'name' => 'name',
'target' => '_blank',
);
foreach ( $attributes as $name => $value ) {
$string = "I link this";
$expect_string = "I link this";
$this->assertEquals( $expect_string, wp_kses( $string, $allowedposttags ) );
}
}
/**
* @ticket 20210
*/
function test_wp_filter_post_kses_abbr() {
global $allowedposttags;
$attributes = array(
'class' => 'classname',
'id' => 'id',
'style' => 'color: red;',
'title' => 'title',
);
foreach ( $attributes as $name => $value ) {
$string = "WP";
$expect_string = "WP";
$this->assertEquals( $expect_string, wp_kses( $string, $allowedposttags ) );
}
}
function test_feed_links() {
global $allowedposttags;
$content = <<CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
EOF;
$expected = <<CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
CLICK ME
EOF;
$this->assertEquals( $expected, wp_kses( $content, $allowedposttags ) );
}
function test_wp_kses_bad_protocol() {
$bad = array(
'dummy:alert(1)',
'javascript:alert(1)',
'JaVaScRiPt:alert(1)',
'javascript:alert(1);',
'javascript:alert(1);',
'javascript:alert(1);',
'javascript:alert(1);',
'javascript:alert(1);',
'javascript:alert(1);',
'javascript:alert(1);',
'javascript:alert(1);',
'javascript:alert(1);',
'javascript:alert('XSS')',
'jav ascript:alert(1);',
'jav ascript:alert(1);',
'jav
ascript:alert(1);',
'jav
ascript:alert(1);',
' javascript:alert(1);',
'javascript:javascript:alert(1);',
'javascript:javascript:alert(1);',
'javascript:javascript:alert(1);',
'javascript:javascript:alert(1);',
'javascript:javascript:alert(1);',
'javascript:alert(1)//?:',
'feed:javascript:alert(1)',
'feed:javascript:feed:javascript:feed:javascript:alert(1)',
);
foreach ( $bad as $k => $x ) {
$result = wp_kses_bad_protocol( wp_kses_normalize_entities( $x ), wp_allowed_protocols() );
if ( ! empty( $result ) && $result != 'alert(1);' && $result != 'alert(1)' ) {
switch ( $k ) {
case 6: $this->assertEquals( 'javascript:alert(1);', $result ); break;
case 12:
$this->assertEquals( str_replace( '&', '&', $x ), $result );
break;
case 22: $this->assertEquals( 'javascript:alert(1);', $result ); break;
case 23: $this->assertEquals( 'javascript:alert(1)//?:', $result ); break;
case 24: $this->assertEquals( 'feed:alert(1)', $result ); break;
default: $this->fail( "wp_kses_bad_protocol failed on $x. Result: $result" );
}
}
}
$safe = array(
'dummy:alert(1)',
'HTTP://example.org/',
'http://example.org/',
'http://example.org/',
'http://example.org/',
'https://example.org',
'http://example.org/wp-admin/post.php?post=2&action=edit',
'http://example.org/index.php?test='blah'',
);
foreach ( $safe as $x ) {
$result = wp_kses_bad_protocol( wp_kses_normalize_entities( $x ), array( 'http', 'https', 'dummy' ) );
if ( $result != $x && $result != 'http://example.org/' )
$this->fail( "wp_kses_bad_protocol incorrectly blocked $x" );
}
}
public function test_hackers_attacks() {
$xss = simplexml_load_file( DIR_TESTDATA . '/formatting/xssAttacks.xml' );
foreach ( $xss->attack as $attack ) {
if ( in_array( $attack->name, array( 'IMG Embedded commands 2', 'US-ASCII encoding', 'OBJECT w/Flash 2', 'Character Encoding Example' ) ) )
continue;
$code = (string) $attack->code;
if ( $code == 'See Below' )
continue;
if ( substr( $code, 0, 4 ) == 'perl' ) {
$pos = strpos( $code, '"' ) + 1;
$code = substr( $code, $pos, strrpos($code, '"') - $pos );
$code = str_replace( '\0', "\0", $code );
}
$result = trim( wp_kses_data( $code ) );
if ( $result == '' || $result == 'XSS' || $result == 'alert("XSS");' || $result == "alert('XSS');" )
continue;
switch ( $attack->name ) {
case 'XSS Locator':
$this->assertEquals('\';alert(String.fromCharCode(88,83,83))//\\\';alert(String.fromCharCode(88,83,83))//";alert(String.fromCharCode(88,83,83))//\\";alert(String.fromCharCode(88,83,83))//-->">\'>alert(String.fromCharCode(88,83,83))=', $result);
break;
case 'XSS Quick Test':
$this->assertEquals('\'\';!--"=', $result);
break;
case 'SCRIPT w/Alert()':
$this->assertEquals( "alert('XSS')", $result );
break;
case 'SCRIPT w/Char Code':
$this->assertEquals('alert(String.fromCharCode(88,83,83))', $result);
break;
case 'IMG STYLE w/expression':
$this->assertEquals('exp/*', $result);
break;
case 'List-style-image':
$this->assertEquals('li {list-style-image: url("javascript:alert(\'XSS\')");}XSS', $result);
break;
case 'STYLE':
$this->assertEquals( "alert('XSS');", $result);
break;
case 'STYLE w/background-image':
$this->assertEquals('.XSS{background-image:url("javascript:alert(\'XSS\')");}', $result);
break;
case 'STYLE w/background':
$this->assertEquals('BODY{background:url("javascript:alert(\'XSS\')")}', $result);
break;
case 'Remote Stylesheet 2':
$this->assertEquals( "@import'http://ha.ckers.org/xss.css';", $result );
break;
case 'Remote Stylesheet 3':
$this->assertEquals( '<META HTTP-EQUIV="Link" Content="; REL=stylesheet">', $result );
break;
case 'Remote Stylesheet 4':
$this->assertEquals('BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}', $result);
break;
case 'XML data island w/CDATA':
$this->assertEquals( "<![CDATA[]]>", $result );
break;
case 'XML data island w/comment':
$this->assertEquals( "<IMG SRC="javascript:alert('XSS')\">", $result );
break;
case 'XML HTML+TIME':
$this->assertEquals( '<t:set attributeName="innerHTML" to="XSSalert(\'XSS\')">', $result );
break;
case 'Commented-out Block':
$this->assertEquals( "\nalert('XSS');", $result );
break;
case 'Cookie Manipulation':
$this->assertEquals( '<META HTTP-EQUIV="Set-Cookie" Content="USERID=alert(\'XSS\')">', $result );
break;
case 'SSI':
$this->assertEquals( '<!--#exec cmd="/bin/echo '', $result );
break;
case 'PHP':
$this->assertEquals( '<? echo('alert("XSS")\'); ?>', $result );
break;
case 'UTF-7 Encoding':
$this->assertEquals( '+ADw-SCRIPT+AD4-alert(\'XSS\');+ADw-/SCRIPT+AD4-', $result );
break;
case 'Escaping JavaScript escapes':
$this->assertEquals('\";alert(\'XSS\');//', $result);
break;
case 'STYLE w/broken up JavaScript':
$this->assertEquals( '@im\port\'\ja\vasc\ript:alert("XSS")\';', $result );
break;
case 'Null Chars 2':
$this->assertEquals( '&alert("XSS")', $result );
break;
case 'No Closing Script Tag':
$this->assertEquals( '<SCRIPT SRC=http://ha.ckers.org/xss.js', $result );
break;
case 'Half-Open HTML/JavaScript':
$this->assertEquals( '<IMG SRC="javascript:alert('XSS')"', $result );
break;
case 'Double open angle brackets':
$this->assertEquals( '<IFRAME SRC=http://ha.ckers.org/scriptlet.html <', $result );
break;
case 'Extraneous Open Brackets':
$this->assertEquals( '<alert("XSS");//<', $result );
break;
case 'Malformed IMG Tags':
$this->assertEquals('alert("XSS")">', $result);
break;
case 'No Quotes/Semicolons':
$this->assertEquals( "a=/XSS/\nalert(a.source)", $result );
break;
case 'Evade Regex Filter 1':
$this->assertEquals( '" SRC="http://ha.ckers.org/xss.js">', $result );
break;
case 'Evade Regex Filter 4':
$this->assertEquals( '\'" SRC="http://ha.ckers.org/xss.js">', $result );
break;
case 'Evade Regex Filter 5':
$this->assertEquals( '` SRC="http://ha.ckers.org/xss.js">', $result );
break;
case 'Filter Evasion 1':
$this->assertEquals( 'document.write("<SCRI");PT SRC="http://ha.ckers.org/xss.js">', $result );
break;
case 'Filter Evasion 2':
$this->assertEquals( '\'>" SRC="http://ha.ckers.org/xss.js">', $result );
break;
default:
$this->fail( 'KSES failed on ' . $attack->name . ': ' . $result );
}
}
}
function _wp_kses_allowed_html_filter( $html, $context ) {
if ( 'post' == $context )
return array( 'a' => array( 'href' => true ) );
else
return array( 'a' => array( 'href' => false ) );
}
/**
* @ticket 20210
*/
public function test_wp_kses_allowed_html() {
global $allowedposttags, $allowedtags, $allowedentitynames;
$this->assertEquals( $allowedposttags, wp_kses_allowed_html( 'post' ) );
$tags = wp_kses_allowed_html( 'post' ) ;
foreach ( $tags as $tag ) {
$this->assertTrue( $tag['class'] );
$this->assertTrue( $tag['id'] );
$this->assertTrue( $tag['style'] );
$this->assertTrue( $tag['title'] );
}
$this->assertEquals( $allowedtags, wp_kses_allowed_html( 'data' ) );
$this->assertEquals( $allowedtags, wp_kses_allowed_html( '' ) );
$this->assertEquals( $allowedtags, wp_kses_allowed_html() );
$tags = wp_kses_allowed_html( 'user_description' );
$this->assertTrue( $tags['a']['rel'] );
$tags = wp_kses_allowed_html();
$this->assertFalse( isset( $tags['a']['rel'] ) );
$this->assertEquals( array(), wp_kses_allowed_html( 'strip' ) );
$custom_tags = array(
'a' => array(
'href' => true,
'rel' => true,
'rev' => true,
'name' => true,
'target' => true,
),
);
$this->assertEquals( $custom_tags, wp_kses_allowed_html( $custom_tags ) );
add_filter( 'wp_kses_allowed_html', array( $this, '_wp_kses_allowed_html_filter' ), 10, 2 );
$this->assertEquals( array( 'a' => array( 'href' => true ) ), wp_kses_allowed_html( 'post' ) );
$this->assertEquals( array( 'a' => array( 'href' => false ) ), wp_kses_allowed_html( 'data' ) );
remove_filter( 'wp_kses_allowed_html', array( $this, '_wp_kses_allowed_html_filter' ) );
$this->assertEquals( $allowedposttags, wp_kses_allowed_html( 'post' ) );
$this->assertEquals( $allowedtags, wp_kses_allowed_html( 'data' ) );
}
}