tests/phpunit/includes/SanitizerTest.php

   1 <?php
   2
   3 class SanitizerTest extends MediaWikiTestCase {
   4
   5         protected function setUp() {
   6                 parent::setUp();
   7
   8                 $this->setMwGlobals( 'wgCleanupPresentationalAttributes', true );
   9
  10                 AutoLoader::loadClass( 'Sanitizer' );
  11         }
  12
  13         function testDecodeNamedEntities() {
  14                 $this->assertEquals(
  15                         "\xc3\xa9cole",
  16                         Sanitizer::decodeCharReferences( '&eacute;cole' ),
  17                         'decode named entities'
  18                 );
  19         }
  20
  21         function testDecodeNumericEntities() {
  22                 $this->assertEquals(
  23                         "\xc4\x88io bonas dans l'\xc3\xa9cole!",
  24                         Sanitizer::decodeCharReferences( "&#x108;io bonas dans l'&#233;cole!" ),
  25                         'decode numeric entities'
  26                 );
  27         }
  28
  29         function testDecodeMixedEntities() {
  30                 $this->assertEquals(
  31                         "\xc4\x88io bonas dans l'\xc3\xa9cole!",
  32                         Sanitizer::decodeCharReferences( "&#x108;io bonas dans l'&eacute;cole!" ),
  33                         'decode mixed numeric/named entities'
  34                 );
  35         }
  36
  37         function testDecodeMixedComplexEntities() {
  38                 $this->assertEquals(
  39                         "\xc4\x88io bonas dans l'\xc3\xa9cole! (mais pas &#x108;io dans l'&eacute;cole)",
  40                         Sanitizer::decodeCharReferences(
  41                                 "&#x108;io bonas dans l'&eacute;cole! (mais pas &amp;#x108;io dans l'&#38;eacute;cole)"
  42                         ),
  43                         'decode mixed complex entities'
  44                 );
  45         }
  46
  47         function testInvalidAmpersand() {
  48                 $this->assertEquals(
  49                         'a & b',
  50                         Sanitizer::decodeCharReferences( 'a & b' ),
  51                         'Invalid ampersand'
  52                 );
  53         }
  54
  55         function testInvalidEntities() {
  56                 $this->assertEquals(
  57                         '&foo;',
  58                         Sanitizer::decodeCharReferences( '&foo;' ),
  59                         'Invalid named entity'
  60                 );
  61         }
  62
  63         function testInvalidNumberedEntities() {
  64                 $this->assertEquals( UTF8_REPLACEMENT, Sanitizer::decodeCharReferences( "&#88888888888888;" ), 'Invalid numbered entity' );
  65         }
  66
  67         function testSelfClosingTag() {
  68                 $GLOBALS['wgUseTidy'] = false;
  69                 $this->assertEquals(
  70                         '<div>Hello world</div>',
  71                         Sanitizer::removeHTMLtags( '<div>Hello world</div />' ),
  72                         'Self-closing closing div'
  73                 );
  74         }
  75
  76         function testDecodeTagAttributes() {
  77                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo=bar' ), array( 'foo' => 'bar' ), 'Unquoted attribute' );
  78                 $this->assertEquals( Sanitizer::decodeTagAttributes( '    foo   =   bar    ' ), array( 'foo' => 'bar' ), 'Spaced attribute' );
  79                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo="bar"' ), array( 'foo' => 'bar' ), 'Double-quoted attribute' );
  80                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo=\'bar\'' ), array( 'foo' => 'bar' ), 'Single-quoted attribute' );
  81                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo=\'bar\'   baz="foo"' ), array( 'foo' => 'bar', 'baz' => 'foo' ), 'Several attributes' );
  82
  83                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo=\'bar\'   baz="foo"' ), array( 'foo' => 'bar', 'baz' => 'foo' ), 'Several attributes' );
  84                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo=\'bar\'   baz="foo"' ), array( 'foo' => 'bar', 'baz' => 'foo' ), 'Several attributes' );
  85
  86                 $this->assertEquals( Sanitizer::decodeTagAttributes( ':foo=\'bar\'' ), array( ':foo' => 'bar' ), 'Leading :' );
  87                 $this->assertEquals( Sanitizer::decodeTagAttributes( '_foo=\'bar\'' ), array( '_foo' => 'bar' ), 'Leading _' );
  88                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'Foo=\'bar\'' ), array( 'foo' => 'bar' ), 'Leading capital' );
  89                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'FOO=BAR' ), array( 'foo' => 'BAR' ), 'Attribute keys are normalized to lowercase' );
  90
  91                 # Invalid beginning
  92                 $this->assertEquals( Sanitizer::decodeTagAttributes( '-foo=bar' ), array(), 'Leading - is forbidden' );
  93                 $this->assertEquals( Sanitizer::decodeTagAttributes( '.foo=bar' ), array(), 'Leading . is forbidden' );
  94                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo-bar=bar' ), array( 'foo-bar' => 'bar' ), 'A - is allowed inside the attribute' );
  95                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo-=bar' ), array( 'foo-' => 'bar' ), 'A - is allowed inside the attribute' );
  96
  97                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo.bar=baz' ), array( 'foo.bar' => 'baz' ), 'A . is allowed inside the attribute' );
  98                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo.=baz' ), array( 'foo.' => 'baz' ), 'A . is allowed as last character' );
  99
 100                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo6=baz' ), array( 'foo6' => 'baz' ), 'Numbers are allowed' );
 101
 102                 # This bit is more relaxed than XML rules, but some extensions use it, like ProofreadPage (see bug 27539)
 103                 $this->assertEquals( Sanitizer::decodeTagAttributes( '1foo=baz' ), array( '1foo' => 'baz' ), 'Leading numbers are allowed' );
 104
 105                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo$=baz' ), array(), 'Symbols are not allowed' );
 106                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo@=baz' ), array(), 'Symbols are not allowed' );
 107                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo~=baz' ), array(), 'Symbols are not allowed' );
 108
 109
 110                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo=1[#^`*%w/(' ), array( 'foo' => '1[#^`*%w/(' ), 'All kind of characters are allowed as values' );
 111                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo="1[#^`*%\'w/("' ), array( 'foo' => '1[#^`*%\'w/(' ), 'Double quotes are allowed if quoted by single quotes' );
 112                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo=\'1[#^`*%"w/(\'' ), array( 'foo' => '1[#^`*%"w/(' ), 'Single quotes are allowed if quoted by double quotes' );
 113                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo=&amp;&quot;' ), array( 'foo' => '&"' ), 'Special chars can be provided as entities' );
 114                 $this->assertEquals( Sanitizer::decodeTagAttributes( 'foo=&foobar;' ), array( 'foo' => '&foobar;' ), 'Entity-like items are accepted' );
 115         }
 116
 117         /**
 118          * @dataProvider provideDeprecatedAttributes
 119          */
 120         function testDeprecatedAttributes( $input, $tag, $expected, $message = null ) {
 121                 $this->assertEquals( $expected, Sanitizer::fixTagAttributes( $input, $tag ), $message );
 122         }
 123
 124         function testDeprecatedAttributesDisabled() {
 125                 global $wgCleanupPresentationalAttributes;
 126
 127                 $wgCleanupPresentationalAttributes = false;
 128
 129                 $this->assertEquals( ' clear="left"', Sanitizer::fixTagAttributes( 'clear="left"', 'br' ), 'Deprecated attributes are not converted to styles when enabled.' );
 130         }
 131
 132         public static function provideDeprecatedAttributes() {
 133                 return array(
 134                         array( 'clear="left"', 'br', ' style="clear: left;"', 'Deprecated attributes are converted to styles when enabled.' ),
 135                         array( 'clear="all"', 'br', ' style="clear: both;"', 'clear=all is converted to clear: both; not clear: all;' ),
 136                         array( 'CLEAR="ALL"', 'br', ' style="clear: both;"', 'clear=ALL is not treated differently from clear=all' ),
 137                         array( 'width="100"', 'td', ' style="width: 100px;"', 'Numeric sizes use pixels instead of numbers.' ),
 138                         array( 'width="100%"', 'td', ' style="width: 100%;"', 'Units are allowed in sizes.' ),
 139                         array( 'WIDTH="100%"', 'td', ' style="width: 100%;"', 'Uppercase WIDTH is treated as lowercase width.' ),
 140                         array( 'WiDTh="100%"', 'td', ' style="width: 100%;"', 'Mixed case does not break WiDTh.' ),
 141                         array( 'nowrap="true"', 'td', ' style="white-space: nowrap;"', 'nowrap attribute is output as white-space: nowrap; not something else.' ),
 142                         array( 'nowrap=""', 'td', ' style="white-space: nowrap;"', 'nowrap="" is considered true, not false' ),
 143                         array( 'NOWRAP="true"', 'td', ' style="white-space: nowrap;"', 'nowrap attribute works when uppercase.' ),
 144                         array( 'NoWrAp="true"', 'td', ' style="white-space: nowrap;"', 'nowrap attribute works when mixed-case.' ),
 145                         array( 'align="right"', 'td', ' style="text-align: right;"'   , 'align on table cells gets converted to text-align' ),
 146                         array( 'align="center"', 'td', ' style="text-align: center;"' , 'align on table cells gets converted to text-align' ),
 147                         array( 'align="left"'  , 'div', ' style="text-align: left;"'  , 'align=(left|right) on div elements gets converted to text-align' ),
 148                         array( 'align="center"', 'div', ' style="text-align: center;"', 'align="center" on div elements gets converted to text-align' ),
 149                         array( 'align="left"'  , 'p',   ' style="text-align: left;"'  , 'align on p elements gets converted to text-align' ),
 150                         array( 'align="left"'  , 'h1',  ' style="text-align: left;"'  , 'align on h1 elements gets converted to text-align' ),
 151                         array( 'align="left"'  , 'h1',  ' style="text-align: left;"'  , 'align on h1 elements gets converted to text-align' ),
 152                         array( 'align="left"'  , 'caption',' style="text-align: left;"','align on caption elements gets converted to text-align' ),
 153                         array( 'align="left"'  , 'tfoot',' style="text-align: left;"' , 'align on tfoot elements gets converted to text-align' ),
 154                         array( 'align="left"'  , 'tbody',' style="text-align: left;"' , 'align on tbody elements gets converted to text-align' ),
 155
 156                         # <tr>
 157                         array( 'align="right"' , 'tr', ' style="text-align: right;"' , 'align on table row get converted to text-align' ),
 158                         array( 'align="center"', 'tr', ' style="text-align: center;"', 'align on table row get converted to text-align' ),
 159                         array( 'align="left"'  , 'tr', ' style="text-align: left;"'  , 'align on table row get converted to text-align' ),
 160
 161                         #table
 162                         array( 'align="left"'  , 'table', ' style="float: left;"'    , 'align on table converted to float' ),
 163                         array( 'align="center"', 'table', ' style="margin-left: auto; margin-right: auto;"', 'align center on table converted to margins' ),
 164                         array( 'align="right"' , 'table', ' style="float: right;"'   , 'align on table converted to float' ),
 165                 );
 166         }
 167
 168         /**
 169          * @dataProvider provideCssCommentsFixtures
 170          */
 171         function testCssCommentsChecking( $expected, $css, $message = '' ) {
 172                 $this->assertEquals(
 173                         $expected,
 174                         Sanitizer::checkCss( $css ),
 175                         $message
 176                 );
 177         }
 178
 179         public static function provideCssCommentsFixtures() {
 180                 /** array( <expected>, <css>, [message] ) */
 181                 return array(
 182                         array( ' ', '/**/' ),
 183                         array( ' ', '/****/' ),
 184                         array( ' ', '/* comment */' ),
 185                         array( ' ', "\\2f\\2a foo \\2a\\2f",
 186                                 'Backslash-escaped comments must be stripped (bug 28450)' ),
 187                         array( '', '/* unfinished comment structure',
 188                                 'Remove anything after a comment-start token' ),
 189                         array( '', "\\2f\\2a unifinished comment'",
 190                                 'Remove anything after a backslash-escaped comment-start token' ),
 191                         array( '/* insecure input */', 'filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'asdf.png\',sizingMethod=\'scale\');'),
 192                         array( '/* insecure input */', '-ms-filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'asdf.png\',sizingMethod=\'scale\')";'),
 193                         array( '/* insecure input */', 'width: expression(1+1);'),
 194                         array( '/* insecure input */', 'background-image: image(asdf.png);'),
 195                         array( '/* insecure input */', 'background-image: -webkit-image(asdf.png);'),
 196                         array( '/* insecure input */', 'background-image: -moz-image(asdf.png);'),
 197                         array( '/* insecure input */', 'background-image: image-set("asdf.png" 1x, "asdf.png" 2x);'),
 198                         array( '/* insecure input */', 'background-image: -webkit-image-set("asdf.png" 1x, "asdf.png" 2x);'),
 199                         array( '/* insecure input */', 'background-image: -moz-image-set("asdf.png" 1x, "asdf.png" 2x);'),
 200                 );
 201         }
 202 }
 203