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Washtml.php
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Washtml.php
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<?php
/**
* Test class to test rcube_washtml class
*
* @package Tests
*/
class Framework_Washtml extends PHPUnit_Framework_TestCase
{
/**
* Test the elimination of some XSS vulnerabilities
*/
function test_html_xss3()
{
// #1488850
$html = '<p><a href="data:text/html,&lt;script&gt;alert(document.cookie)&lt;/script&gt;">Firefox</a>'
.'<a href="vbscript:alert(document.cookie)">Internet Explorer</a></p>'
.'<p><A href="data:text/html,&lt;script&gt;alert(document.cookie)&lt;/script&gt;">Firefox</a>'
.'<A HREF="vbscript:alert(document.cookie)">Internet Explorer</a></p>';
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertNotRegExp('/data:text/', $washed, "Remove data:text/html links");
$this->assertNotRegExp('/vbscript:/', $washed, "Remove vbscript: links");
}
/**
* Test fixing of invalid href (#1488940)
*/
function test_href()
{
$html = "<p><a href=\"\nhttp://test.com\n\">Firefox</a>";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertRegExp('|href="http://test.com">|', $washed, "Link href with newlines (#1488940)");
}
/**
* Test XSS in area's href (#5240)
*/
function test_href_area()
{
$html = '<p><area href="data:text/html,&lt;script&gt;alert(document.cookie)&lt;/script&gt;">'
. '<area href="vbscript:alert(document.cookie)">Internet Explorer</p>'
. '<area href="javascript:alert(document.domain)" shape=default>'
. '<p><AREA HREF="data:text/html,&lt;script&gt;alert(document.cookie)&lt;/script&gt;">'
. '<Area href="vbscript:alert(document.cookie)">Internet Explorer</p>'
. '<area HREF="javascript:alert(document.domain)" shape=default>';
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertNotRegExp('/data:text/', $washed, "data:text/html in area href");
$this->assertNotRegExp('/vbscript:/', $washed, "vbscript: in area href");
$this->assertNotRegExp('/javascript:/', $washed, "javascript: in area href");
}
/**
* Test handling HTML comments
*/
function test_comments()
{
$washer = new rcube_washtml;
$html = "<!--[if gte mso 10]><p>p1</p><!--><p>p2</p>";
$washed = $washer->wash($html);
$this->assertEquals('<!-- html ignored --><!-- body ignored --><p>p2</p>', $washed, "HTML conditional comments (#1489004)");
$html = "<!--TestCommentInvalid><p>test</p>";
$washed = $washer->wash($html);
$this->assertEquals('<!-- html ignored --><!-- body ignored --><p>test</p>', $washed, "HTML invalid comments (#1487759)");
$html = "<p>para1</p><!-- comment --><p>para2</p>";
$washed = $washer->wash($html);
$this->assertEquals('<!-- html ignored --><!-- body ignored --><p>para1</p><p>para2</p>', $washed, "HTML comments - simple comment");
$html = "<p>para1</p><!-- <hr> comment --><p>para2</p>";
$washed = $washer->wash($html);
$this->assertEquals('<!-- html ignored --><!-- body ignored --><p>para1</p><p>para2</p>', $washed, "HTML comments - tags inside (#1489904)");
}
/**
* Test fixing of invalid self-closing elements (#1489137)
*/
function test_self_closing()
{
$html = "<textarea>test";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertRegExp('|<textarea>test</textarea>|', $washed, "Self-closing textarea (#1489137)");
}
/**
* Test fixing of invalid closing tags (#1489446)
*/
function test_closing_tag_attrs()
{
$html = "<a href=\"http://test.com\">test</a href>";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertRegExp('|</a>|', $washed, "Invalid closing tag (#1489446)");
}
/**
* Test fixing of invalid lists nesting (#1488768)
*/
function test_lists()
{
$data = array(
array(
"<ol><li>First</li><li>Second</li><ul><li>First sub</li></ul><li>Third</li></ol>",
"<ol><li>First</li><li>Second<ul><li>First sub</li></ul></li><li>Third</li></ol>"
),
array(
"<ol><li>First<ul><li>First sub</li></ul></li></ol>",
"<ol><li>First<ul><li>First sub</li></ul></li></ol>",
),
array(
"<ol><li>First<ol><li>First sub</li></ol></li></ol>",
"<ol><li>First<ol><li>First sub</li></ol></li></ol>",
),
array(
"<ul><li>First</li><ul><li>First sub</li><ul><li>sub sub</li></ul></ul><li></li></ul>",
"<ul><li>First<ul><li>First sub<ul><li>sub sub</li></ul></li></ul></li><li></li></ul>",
),
array(
"<ul><li>First</li><li>second</li><ul><ul><li>sub sub</li></ul></ul></ul>",
"<ul><li>First</li><li>second<ul><ul><li>sub sub</li></ul></ul></li></ul>",
),
array(
"<ol><ol><ol></ol></ol></ol>",
"<ol><ol><ol></ol></ol></ol>",
),
array(
"<div><ol><ol><ol></ol></ol></ol></div>",
"<div><ol><ol><ol></ol></ol></ol></div>",
),
);
foreach ($data as $element) {
rcube_washtml::fix_broken_lists($element[0]);
$this->assertSame($element[1], $element[0], "Broken nested lists (#1488768)");
}
}
/**
* Test color style handling (#1489697)
*/
function test_color_style()
{
$html = "<p style=\"font-size: 10px; color: rgb(241, 245, 218)\">a</p>";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertRegExp('|color: rgb\(241, 245, 218\)|', $washed, "Color style (#1489697)");
$this->assertRegExp('|font-size: 10px|', $washed, "Font-size style");
}
/**
* Test handling of unicode chars in style (#1489777)
*/
function test_style_unicode()
{
$html = "<html><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />
<body><span style='font-family:\"新細明體\",\"serif\";color:red'>test</span></body></html>";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertRegExp('|style="font-family: \&quot;新細明體\&quot;,\&quot;serif\&quot;; color: red"|', $washed, "Unicode chars in style attribute - quoted (#1489697)");
$html = "<html><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />
<body><span style='font-family:新細明體;color:red'>test</span></body></html>";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertRegExp('|style="font-family: 新細明體; color: red"|', $washed, "Unicode chars in style attribute (#1489697)");
}
/**
* Test style item fixes
*/
function test_style_wash()
{
$html = "<p style=\"line-height: 1; height: 10\">a</p>";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertRegExp('|line-height: 1;|', $washed, "Untouched line-height (#1489917)");
$this->assertRegExp('|; height: 10px|', $washed, "Fixed height units");
$html = "<div style=\"padding: 0px\n 20px;border:1px solid #000;\"></div>";
$expected = "<div style=\"padding: 0px 20px; border: 1px solid #000\"></div>";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertTrue(strpos($washed, $expected) !== false, "White-space and new-line characters handling");
}
/**
* Test invalid style cleanup - XSS prevention (#1490227)
*/
function test_style_wash_xss()
{
$html = "<img style=aaa:'\"/onerror=alert(1)//'>";
$exp = "<img style=\"aaa: '&quot;/onerror=alert(1)//'\" />";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertTrue(strpos($washed, $exp) !== false, "Style quotes XSS issue (#1490227)");
$html = "<img style=aaa:'&quot;/onerror=alert(1)//'>";
$exp = "<img style=\"aaa: '&quot;/onerror=alert(1)//'\" />";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertTrue(strpos($washed, $exp) !== false, "Style quotes XSS issue (#1490227)");
}
/**
* Test SVG cleanup
*/
function test_wash_svg()
{
$svg = '<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:cc="http://creativecommons.org/ns#" viewBox="0 0 100 100">
<polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400" onmouseover="alert(1)" />
<text x="50" y="68" font-size="48" fill="#FFF" text-anchor="middle"><![CDATA[410]]></text>
<script type="text/javascript">
alert(document.cookie);
</script>
<text x="10" y="25" >An example text</text>
<a xlink:href="http://www.w.pl"><rect width="100%" height="100%" /></a>
<foreignObject xlink:href="data:text/xml,%3Cscript xmlns=\'http://www.w3.org/1999/xhtml\'%3Ealert(1)%3C/script%3E"/>
<set attributeName="onmouseover" to="alert(1)"/>
<animate attributeName="onunload" to="alert(1)"/>
<animate attributeName="xlink:href" begin="0" from="javascript:alert(1)" />
</svg>';
$exp = '<svg xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" version="1.1" baseProfile="full" viewBox="0 0 100 100">
<polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400" x-washed="onmouseover" />
<text x="50" y="68" font-size="48" fill="#FFF" text-anchor="middle">410</text>
<!-- script not allowed -->
<text x="10" y="25">An example text</text>
<a xlink:href="http://www.w.pl"><rect width="100%" height="100%" /></a>
<!-- foreignObject ignored -->
<set attributeName="onmouseover" x-washed="to" />
<animate attributeName="onunload" x-washed="to" />
<animate attributeName="xlink:href" begin="0" x-washed="from" />
</svg>';
$washer = new rcube_washtml;
$washed = $washer->wash($svg);
$this->assertSame($washed, $exp, "SVG content");
}
/**
* Test position:fixed cleanup - (#5264)
*/
function test_style_wash_position_fixed()
{
$html = "<img style='position:fixed' /><img style=\"position:/**/ fixed; top:10px\" />";
$exp = "<img style=\"position: absolute\" /><img style=\"position: absolute; top: 10px\" />";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertTrue(strpos($washed, $exp) !== false, "Position:fixed (#5264)");
}
/**
* Test MathML cleanup
*/
function test_wash_mathml()
{
$mathml = '<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body>
<math xmlns="http://www.w3.org/1998/Math/MathML"><semantics>
<mrow>
<msub><mi>I</mi><mi>D</mi></msub>
<mo>=</mo>
<mfrac><mn>1</mn><mn>2</mn></mfrac>
<msub><mi>k</mi><mi>n</mi></msub>
<mfrac><mi>W</mi><mi>L</mi></mfrac>
<mo stretchy="false">(</mo>
<msub><mi>V</mi><mrow><mi>G</mi><mi>S</mi></mrow></msub>
<mo>-</mo><msub><mi>V</mi><mi>t</mi></msub><msup>
<mo stretchy="false">)</mo><mn>2</mn></msup>
</mrow>
<annotation encoding="TeX">I_D = \frac{1}{2} k_n \frac{W}{L} (V_{GS}-V_t)^2</annotation>
</semantics></math>
</body></html>';
$exp = '<!-- html ignored --><!-- head ignored --><!-- meta ignored --><!-- body ignored -->
<math xmlns="http://www.w3.org/1998/Math/MathML"><semantics>
<mrow>
<msub><mi>I</mi><mi>D</mi></msub>
<mo>=</mo>
<mfrac><mn>1</mn><mn>2</mn></mfrac>
<msub><mi>k</mi><mi>n</mi></msub>
<mfrac><mi>W</mi><mi>L</mi></mfrac>
<mo stretchy="false">(</mo>
<msub><mi>V</mi><mrow><mi>G</mi><mi>S</mi></mrow></msub>
<mo>-</mo><msub><mi>V</mi><mi>t</mi></msub><msup>
<mo stretchy="false">)</mo><mn>2</mn></msup>
</mrow>
<annotation encoding="TeX">I_D = \frac{1}{2} k_n \frac{W}{L} (V_{GS}-V_t)^2</annotation>
</semantics></math>';
$washer = new rcube_washtml;
$washed = $washer->wash($mathml);
// remove whitespace between tags
$washed = preg_replace('/>[\s\r\n\t]+</', '><', $washed);
$exp = preg_replace('/>[\s\r\n\t]+</', '><', $exp);
$this->assertSame(trim($washed), trim($exp), "MathML content");
}
/**
* Test external links in src of input/video elements (#5583)
*/
function test_src_wash()
{
$html = "<input type=\"image\" src=\"http://TRACKING_URL/\">";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertTrue($washer->extlinks);
$this->assertNotContains('TRACKING', $washed, "Src attribute of <input> tag (#5583)");
$html = "<video src=\"http://TRACKING_URL/\">";
$washer = new rcube_washtml;
$washed = $washer->wash($html);
$this->assertTrue($washer->extlinks);
$this->assertNotContains('TRACKING', $washed, "Src attribute of <video> tag (#5583)");
}
}

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