646 lines
19 KiB
PHP
646 lines
19 KiB
PHP
<?php
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/**
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* Some simple test cases for KSES post content filtering
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*
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* @group formatting
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* @group kses
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*/
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class Tests_Kses extends WP_UnitTestCase {
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/**
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* @ticket 20210
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*/
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function test_wp_filter_post_kses_address() {
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global $allowedposttags;
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$attributes = array(
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'class' => 'classname',
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'id' => 'id',
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'style' => 'color: red;',
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'style' => 'color: red',
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'style' => 'color: red; text-align:center',
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'style' => 'color: red; text-align:center;',
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'title' => 'title',
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);
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foreach ( $attributes as $name => $value ) {
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$string = "<address $name='$value'>1 WordPress Avenue, The Internet.</address>";
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$expect_string = "<address $name='" . str_replace( '; ', ';', trim( $value, ';' ) ) . "'>1 WordPress Avenue, The Internet.</address>";
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$this->assertEquals( $expect_string, wp_kses( $string, $allowedposttags ) );
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}
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}
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/**
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* @ticket 20210
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*/
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function test_wp_filter_post_kses_a() {
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global $allowedposttags;
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$attributes = array(
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'class' => 'classname',
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'id' => 'id',
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'style' => 'color: red;',
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'title' => 'title',
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'href' => 'http://example.com',
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'rel' => 'related',
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'rev' => 'revision',
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'name' => 'name',
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'target' => '_blank',
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);
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foreach ( $attributes as $name => $value ) {
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$string = "<a $name='$value'>I link this</a>";
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$expect_string = "<a $name='" . trim( $value, ';' ) . "'>I link this</a>";
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$this->assertEquals( $expect_string, wp_kses( $string, $allowedposttags ) );
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}
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}
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/**
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* @ticket 20210
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*/
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function test_wp_filter_post_kses_abbr() {
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global $allowedposttags;
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$attributes = array(
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'class' => 'classname',
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'id' => 'id',
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'style' => 'color: red;',
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'title' => 'title',
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);
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foreach ( $attributes as $name => $value ) {
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$string = "<abbr $name='$value'>WP</abbr>";
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$expect_string = "<abbr $name='" . trim( $value, ';' ) . "'>WP</abbr>";
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$this->assertEquals( $expect_string, wp_kses( $string, $allowedposttags ) );
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}
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}
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function test_feed_links() {
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global $allowedposttags;
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$content = <<<EOF
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<a href="feed:javascript:alert(1)">CLICK ME</a>
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<a href="feed:javascript:feed:alert(1)">CLICK ME</a>
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<a href="feed:feed:javascript:alert(1)">CLICK ME</a>
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<a href="javascript:feed:alert(1)">CLICK ME</a>
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<a href="javascript:feed:javascript:alert(1)">CLICK ME</a>
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<a href="feed:feed:feed:javascript:alert(1)">CLICK ME</a>
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<a href="feed:feed:feed:feed:javascript:alert(1)">CLICK ME</a>
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<a href="feed:feed:feed:feed:feed:javascript:alert(1)">CLICK ME</a>
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<a href="feed:javascript:feed:javascript:feed:javascript:alert(1)">CLICK ME</a>
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<a href="feed:javascript:feed:javascript:feed:javascript:feed:javascript:feed:javascript:alert(1)">CLICK ME</a>
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<a href="feed:feed:feed:http:alert(1)">CLICK ME</a>
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EOF;
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$expected = <<<EOF
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<a href="feed:alert(1)">CLICK ME</a>
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<a href="feed:feed:alert(1)">CLICK ME</a>
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<a href="feed:feed:alert(1)">CLICK ME</a>
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<a href="feed:alert(1)">CLICK ME</a>
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<a href="feed:alert(1)">CLICK ME</a>
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<a href="">CLICK ME</a>
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<a href="">CLICK ME</a>
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<a href="">CLICK ME</a>
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<a href="">CLICK ME</a>
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<a href="">CLICK ME</a>
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<a href="">CLICK ME</a>
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EOF;
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$this->assertEquals( $expected, wp_kses( $content, $allowedposttags ) );
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}
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function test_wp_kses_bad_protocol() {
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$bad = array(
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'dummy:alert(1)',
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'javascript:alert(1)',
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'JaVaScRiPt:alert(1)',
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'javascript:alert(1);',
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'javascript:alert(1);',
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'javascript:alert(1);',
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'javascript:alert(1);',
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'javascript:alert(1);',
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'javascript:alert(1);',
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'javascript:alert(1);',
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'javascript:alert(1);',
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'javascript:alert(1);',
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'javascript:alert('XSS')',
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'jav ascript:alert(1);',
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'jav	ascript:alert(1);',
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'jav
ascript:alert(1);',
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'jav
ascript:alert(1);',
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'  javascript:alert(1);',
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'javascript:javascript:alert(1);',
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'javascript:javascript:alert(1);',
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'javascript:javascript:alert(1);',
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'javascript:javascript:alert(1);',
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'javascript:javascript:alert(1);',
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'javascript:alert(1)//?:',
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'feed:javascript:alert(1)',
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'feed:javascript:feed:javascript:feed:javascript:alert(1)',
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);
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foreach ( $bad as $k => $x ) {
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$result = wp_kses_bad_protocol( wp_kses_normalize_entities( $x ), wp_allowed_protocols() );
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if ( ! empty( $result ) && $result != 'alert(1);' && $result != 'alert(1)' ) {
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switch ( $k ) {
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case 6: $this->assertEquals( 'javascript&#0000058alert(1);', $result ); break;
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case 12:
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$this->assertEquals( str_replace( '&', '&', $x ), $result );
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break;
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case 22: $this->assertEquals( 'javascript&#0000058alert(1);', $result ); break;
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case 23: $this->assertEquals( 'javascript&#0000058alert(1)//?:', $result ); break;
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case 24: $this->assertEquals( 'feed:alert(1)', $result ); break;
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default: $this->fail( "wp_kses_bad_protocol failed on $x. Result: $result" );
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}
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}
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}
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$safe = array(
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'dummy:alert(1)',
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'HTTP://example.org/',
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'http://example.org/',
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'http://example.org/',
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'http://example.org/',
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'https://example.org',
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'http://example.org/wp-admin/post.php?post=2&action=edit',
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'http://example.org/index.php?test='blah'',
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);
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foreach ( $safe as $x ) {
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$result = wp_kses_bad_protocol( wp_kses_normalize_entities( $x ), array( 'http', 'https', 'dummy' ) );
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if ( $result != $x && $result != 'http://example.org/' )
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$this->fail( "wp_kses_bad_protocol incorrectly blocked $x" );
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}
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}
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public function test_hackers_attacks() {
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$xss = simplexml_load_file( DIR_TESTDATA . '/formatting/xssAttacks.xml' );
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foreach ( $xss->attack as $attack ) {
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if ( in_array( $attack->name, array( 'IMG Embedded commands 2', 'US-ASCII encoding', 'OBJECT w/Flash 2', 'Character Encoding Example' ) ) )
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continue;
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$code = (string) $attack->code;
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if ( $code == 'See Below' )
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continue;
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if ( substr( $code, 0, 4 ) == 'perl' ) {
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$pos = strpos( $code, '"' ) + 1;
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$code = substr( $code, $pos, strrpos($code, '"') - $pos );
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$code = str_replace( '\0', "\0", $code );
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}
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$result = trim( wp_kses_data( $code ) );
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if ( $result == '' || $result == 'XSS' || $result == 'alert("XSS");' || $result == "alert('XSS');" )
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continue;
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switch ( $attack->name ) {
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case 'XSS Locator':
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$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))=', $result);
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break;
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case 'XSS Quick Test':
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$this->assertEquals('\'\';!--"=', $result);
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break;
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case 'SCRIPT w/Alert()':
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$this->assertEquals( "alert('XSS')", $result );
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break;
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case 'SCRIPT w/Char Code':
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$this->assertEquals('alert(String.fromCharCode(88,83,83))', $result);
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break;
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case 'IMG STYLE w/expression':
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$this->assertEquals('exp/*', $result);
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break;
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case 'List-style-image':
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$this->assertEquals('li {list-style-image: url("javascript:alert(\'XSS\')");}XSS', $result);
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break;
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case 'STYLE':
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$this->assertEquals( "alert('XSS');", $result);
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break;
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case 'STYLE w/background-image':
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$this->assertEquals('.XSS{background-image:url("javascript:alert(\'XSS\')");}<A></A>', $result);
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break;
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case 'STYLE w/background':
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$this->assertEquals('BODY{background:url("javascript:alert(\'XSS\')")}', $result);
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break;
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case 'Remote Stylesheet 2':
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$this->assertEquals( "@import'http://ha.ckers.org/xss.css';", $result );
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break;
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case 'Remote Stylesheet 3':
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$this->assertEquals( '<META HTTP-EQUIV="Link" Content="; REL=stylesheet">', $result );
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break;
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case 'Remote Stylesheet 4':
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$this->assertEquals('BODY{-moz-binding:url("http://ha.ckers.org/xssmoz.xml#xss")}', $result);
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break;
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case 'XML data island w/CDATA':
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$this->assertEquals( "<![CDATA[]]>", $result );
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break;
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case 'XML data island w/comment':
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$this->assertEquals( "<I><B><IMG SRC="javas<!-- -->cript:alert('XSS')\"></B></I>", $result );
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break;
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case 'XML HTML+TIME':
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$this->assertEquals( '<t:set attributeName="innerHTML" to="XSSalert(\'XSS\')">', $result );
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break;
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case 'Commented-out Block':
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$this->assertEquals( "<!--[if gte IE 4]>-->\nalert('XSS');", $result );
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break;
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case 'Cookie Manipulation':
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$this->assertEquals( '<META HTTP-EQUIV="Set-Cookie" Content="USERID=alert(\'XSS\')">', $result );
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break;
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case 'SSI':
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$this->assertEquals( '<!--#exec cmd="/bin/echo '<!--#exec cmd="/bin/echo \'=http://ha.ckers.org/xss.js>\'"-->', $result );
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break;
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case 'PHP':
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$this->assertEquals( '<? echo('alert("XSS")\'); ?>', $result );
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break;
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case 'UTF-7 Encoding':
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$this->assertEquals( '+ADw-SCRIPT+AD4-alert(\'XSS\');+ADw-/SCRIPT+AD4-', $result );
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break;
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case 'Escaping JavaScript escapes':
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$this->assertEquals('\";alert(\'XSS\');//', $result);
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break;
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case 'STYLE w/broken up JavaScript':
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$this->assertEquals( '@im\port\'\ja\vasc\ript:alert("XSS")\';', $result );
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break;
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case 'Null Chars 2':
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$this->assertEquals( '&alert("XSS")', $result );
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break;
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case 'No Closing Script Tag':
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$this->assertEquals( '<SCRIPT SRC=http://ha.ckers.org/xss.js', $result );
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break;
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case 'Half-Open HTML/JavaScript':
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$this->assertEquals( '<IMG SRC="javascript:alert('XSS')"', $result );
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break;
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case 'Double open angle brackets':
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$this->assertEquals( '<IFRAME SRC=http://ha.ckers.org/scriptlet.html <', $result );
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break;
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case 'Extraneous Open Brackets':
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$this->assertEquals( '<alert("XSS");//<', $result );
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break;
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case 'Malformed IMG Tags':
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$this->assertEquals('alert("XSS")">', $result);
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break;
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case 'No Quotes/Semicolons':
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$this->assertEquals( "a=/XSS/\nalert(a.source)", $result );
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break;
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case 'Evade Regex Filter 1':
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$this->assertEquals( '" SRC="http://ha.ckers.org/xss.js">', $result );
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break;
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case 'Evade Regex Filter 4':
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$this->assertEquals( '\'" SRC="http://ha.ckers.org/xss.js">', $result );
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break;
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case 'Evade Regex Filter 5':
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$this->assertEquals( '` SRC="http://ha.ckers.org/xss.js">', $result );
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break;
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case 'Filter Evasion 1':
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$this->assertEquals( 'document.write("<SCRI");PT SRC="http://ha.ckers.org/xss.js">', $result );
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break;
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case 'Filter Evasion 2':
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$this->assertEquals( '\'>" SRC="http://ha.ckers.org/xss.js">', $result );
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break;
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default:
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$this->fail( 'KSES failed on ' . $attack->name . ': ' . $result );
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}
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}
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}
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function _wp_kses_allowed_html_filter( $html, $context ) {
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if ( 'post' == $context )
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return array( 'a' => array( 'href' => true ) );
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else
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return array( 'a' => array( 'href' => false ) );
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}
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/**
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* @ticket 20210
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*/
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public function test_wp_kses_allowed_html() {
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global $allowedposttags, $allowedtags, $allowedentitynames;
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$this->assertEquals( $allowedposttags, wp_kses_allowed_html( 'post' ) );
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$tags = wp_kses_allowed_html( 'post' ) ;
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foreach ( $tags as $tag ) {
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$this->assertTrue( $tag['class'] );
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$this->assertTrue( $tag['id'] );
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$this->assertTrue( $tag['style'] );
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$this->assertTrue( $tag['title'] );
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}
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$this->assertEquals( $allowedtags, wp_kses_allowed_html( 'data' ) );
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$this->assertEquals( $allowedtags, wp_kses_allowed_html( '' ) );
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$this->assertEquals( $allowedtags, wp_kses_allowed_html() );
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$tags = wp_kses_allowed_html( 'user_description' );
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$this->assertTrue( $tags['a']['rel'] );
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$tags = wp_kses_allowed_html();
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$this->assertFalse( isset( $tags['a']['rel'] ) );
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$this->assertEquals( array(), wp_kses_allowed_html( 'strip' ) );
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$custom_tags = array(
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'a' => array(
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'href' => true,
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'rel' => true,
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'rev' => true,
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'name' => true,
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'target' => true,
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),
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);
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$this->assertEquals( $custom_tags, wp_kses_allowed_html( $custom_tags ) );
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add_filter( 'wp_kses_allowed_html', array( $this, '_wp_kses_allowed_html_filter' ), 10, 2 );
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$this->assertEquals( array( 'a' => array( 'href' => true ) ), wp_kses_allowed_html( 'post' ) );
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$this->assertEquals( array( 'a' => array( 'href' => false ) ), wp_kses_allowed_html( 'data' ) );
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remove_filter( 'wp_kses_allowed_html', array( $this, '_wp_kses_allowed_html_filter' ) );
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$this->assertEquals( $allowedposttags, wp_kses_allowed_html( 'post' ) );
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$this->assertEquals( $allowedtags, wp_kses_allowed_html( 'data' ) );
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}
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/**
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* @ticket 26290
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*/
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public function test_wp_kses_normalize_entities() {
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$this->assertEquals( '♠', wp_kses_normalize_entities( '♠' ) );
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$this->assertEquals( '¹', wp_kses_normalize_entities( '¹' ) );
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$this->assertEquals( '²', wp_kses_normalize_entities( '²' ) );
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$this->assertEquals( '³', wp_kses_normalize_entities( '³' ) );
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$this->assertEquals( '¼', wp_kses_normalize_entities( '¼' ) );
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$this->assertEquals( '½', wp_kses_normalize_entities( '½' ) );
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$this->assertEquals( '¾', wp_kses_normalize_entities( '¾' ) );
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$this->assertEquals( '∴', wp_kses_normalize_entities( '∴' ) );
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}
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/**
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* Test removal of invalid binary data for HTML.
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*
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* @ticket 28506
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* @dataProvider data_ctrl_removal
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*/
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function test_ctrl_removal( $input, $output ) {
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global $allowedposttags;
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return $this->assertEquals( $output, wp_kses( $input, $allowedposttags ) );
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}
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function data_ctrl_removal() {
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return array(
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array(
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"\x00\x01\x02\x03\x04\x05\x06\x07\x08\x0B\x0C\x0E\x0F\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\X1C\x1D\x1E\x1F",
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'',
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),
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array(
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"\x00h\x01e\x02l\x03l\x04o\x05 \x06w\x07o\x08r\x0Bl\x0Cd\x0E.\x0F \x10W\x11O\x12R\x13D\x14P\x15R\x16E\x17S\x18S\x19 \x1AK\x1BS\X1CE\x1DS\x1E.\x1F/",
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'hello world. WORDPRESS KSES./',
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),
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array(
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"\x1F\x1E\x1D\x1C\x1B\x1A\x19\x18\x17\x16\x15\x14\x13\x12\x11\x10\x0F\x0E\x0C\x0B\x08\x07\x06\x05\x04\X03\x02\x01\x00",
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'',
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),
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array(
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"\x1Fh\x1Ee\x1Dl\x1Cl\x1Bo\x1A \x19w\x18o\x17r\x16l\x15d\x14.\x13 \x12W\x11O\x10R\x0FD\x0EP\x0CR\x0BE\x08S\x07S\x06 \x05K\x04S\X03E\x02S\x01.\x00/",
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'hello world. WORDPRESS KSES./',
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),
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array(
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"\t\r\n word \n\r\t",
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"\t\r\n word \n\r\t",
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),
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);
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}
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/**
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* Test removal of '\0' strings.
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*
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* @ticket 28699
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* @dataProvider data_slash_zero_removal
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*/
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function test_slash_zero_removal( $input, $output ) {
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global $allowedposttags;
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return $this->assertEquals( $output, wp_kses( $input, $allowedposttags ) );
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}
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function data_slash_zero_removal() {
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return array(
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array(
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'This \\0 should be no big deal.',
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'This \\0 should be no big deal.',
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),
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array(
|
|
'<div>This \\0 should be no big deal.</div>',
|
|
'<div>This \\0 should be no big deal.</div>',
|
|
),
|
|
array(
|
|
'<div align="\\0left">This should be no big deal.</div>',
|
|
'<div align="\\0left">This should be no big deal.</div>',
|
|
),
|
|
array(
|
|
'This <div style="float:\\0left"> is more of a concern.',
|
|
'This <div style="float:left"> is more of a concern.',
|
|
),
|
|
array(
|
|
'This <div style="float:\\0\\0left"> is more of a concern.',
|
|
'This <div style="float:left"> is more of a concern.',
|
|
),
|
|
array(
|
|
'This <div style="float:\\\\00left"> is more of a concern.',
|
|
'This <div style="float:left"> is more of a concern.',
|
|
),
|
|
array(
|
|
'This <div style="float:\\\\\\\\0000left"> is more of a concern.',
|
|
'This <div style="float:left"> is more of a concern.',
|
|
),
|
|
array(
|
|
'This <div style="float:\\0000left"> is more of a concern.',
|
|
'This <div style="float:left"> is more of a concern.',
|
|
),
|
|
array(
|
|
'<style type="text/css">div {background-image:\\0}</style>',
|
|
'div {background-image:\\0}',
|
|
),
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Test new function wp_kses_hair_parse().
|
|
*
|
|
* @dataProvider data_hair_parse
|
|
*/
|
|
function test_hair_parse( $input, $output ) {
|
|
return $this->assertEquals( $output, wp_kses_hair_parse( $input ) );
|
|
}
|
|
|
|
function data_hair_parse() {
|
|
return array(
|
|
array(
|
|
'title="hello" href="#" id="my_id" ',
|
|
array( 'title="hello" ', 'href="#" ', 'id="my_id" ' ),
|
|
),
|
|
array(
|
|
'[shortcode attr="value"] href="http://www.google.com/"title="moo"disabled',
|
|
array( '[shortcode attr="value"] ', 'href="http://www.google.com/"', 'title="moo"', 'disabled' ),
|
|
),
|
|
array(
|
|
'',
|
|
array(),
|
|
),
|
|
array(
|
|
'a',
|
|
array( 'a' ),
|
|
),
|
|
array(
|
|
'title="hello"disabled href=# id=\'my_id\'',
|
|
array( 'title="hello"', 'disabled ', 'href=# ', "id='my_id'" ),
|
|
),
|
|
array(
|
|
' ', // Calling function is expected to strip leading whitespace.
|
|
false,
|
|
),
|
|
array(
|
|
'abcd=abcd"abcd"',
|
|
false,
|
|
),
|
|
array(
|
|
"array[1]='z'z'z'z",
|
|
false,
|
|
),
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Test new function wp_kses_attr_parse().
|
|
*
|
|
* @dataProvider data_attr_parse
|
|
*/
|
|
function test_attr_parse( $input, $output ) {
|
|
return $this->assertEquals( $output, wp_kses_attr_parse( $input ) );
|
|
}
|
|
|
|
function data_attr_parse() {
|
|
return array(
|
|
array(
|
|
'<a title="hello" href="#" id="my_id" >',
|
|
array( '<a ', 'title="hello" ', 'href="#" ', 'id="my_id" ', '>' ),
|
|
),
|
|
array(
|
|
'<a [shortcode attr="value"] href="http://www.google.com/"title="moo"disabled>',
|
|
array( '<a ', '[shortcode attr="value"] ', 'href="http://www.google.com/"', 'title="moo"', 'disabled', '>' ),
|
|
),
|
|
array(
|
|
'',
|
|
false,
|
|
),
|
|
array(
|
|
'a',
|
|
false,
|
|
),
|
|
array(
|
|
'<a>',
|
|
array( '<a', '>' ),
|
|
),
|
|
array(
|
|
'<a%%&&**>',
|
|
false,
|
|
),
|
|
array(
|
|
'<a title="hello"disabled href=# id=\'my_id\'>',
|
|
array( '<a ', 'title="hello"', 'disabled ', 'href=# ', "id='my_id'", ">" ),
|
|
),
|
|
array(
|
|
'<a >',
|
|
array( '<a ', '>' ),
|
|
),
|
|
array(
|
|
'<a abcd=abcd"abcd">',
|
|
false,
|
|
),
|
|
array(
|
|
"<a array[1]='z'z'z'z>",
|
|
false,
|
|
),
|
|
array(
|
|
'<img title="hello" src="#" id="my_id" />',
|
|
array( '<img ', 'title="hello" ', 'src="#" ', 'id="my_id"', ' />' ),
|
|
),
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Test new function wp_kses_one_attr().
|
|
*
|
|
* @dataProvider data_one_attr
|
|
*/
|
|
function test_one_attr( $element, $input, $output ) {
|
|
return $this->assertEquals( $output, wp_kses_one_attr( $input, $element ) );
|
|
}
|
|
|
|
function data_one_attr() {
|
|
return array(
|
|
array(
|
|
'a',
|
|
' title="hello" ',
|
|
' title="hello" ',
|
|
),
|
|
array(
|
|
'a',
|
|
'title = "hello"',
|
|
'title="hello"',
|
|
),
|
|
array(
|
|
'a',
|
|
"title='hello'",
|
|
"title='hello'",
|
|
),
|
|
array(
|
|
'a',
|
|
'title=hello',
|
|
'title="hello"',
|
|
),
|
|
array(
|
|
'a',
|
|
'href="javascript:alert(1)"',
|
|
'href="alert(1)"',
|
|
),
|
|
array(
|
|
'a',
|
|
'style ="style "',
|
|
'style="style"',
|
|
),
|
|
array(
|
|
'a',
|
|
'style="style "',
|
|
'style="style"',
|
|
),
|
|
array(
|
|
'a',
|
|
'style ="style ="',
|
|
'',
|
|
),
|
|
array(
|
|
'img',
|
|
'src="mypic.jpg"',
|
|
'src="mypic.jpg"',
|
|
),
|
|
array(
|
|
'img',
|
|
'onerror=alert(1)',
|
|
'',
|
|
),
|
|
array(
|
|
'img',
|
|
'title=>',
|
|
'title=">"',
|
|
),
|
|
array(
|
|
'img',
|
|
'title="&garbage";"',
|
|
'title="&garbage";"',
|
|
),
|
|
);
|
|
}
|
|
}
|