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Add rel config option for links
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@norkunas
norkunas committed Sep 14, 2021
1 parent d2dd64c commit 05822d6
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Showing 2 changed files with 25 additions and 20 deletions.
4 changes: 4 additions & 0 deletions src/Extension/Basic/NodeVisitor/ANodeVisitor.php
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Original file line number Diff line number Diff line change
Expand Up @@ -62,13 +62,17 @@ public function getDefaultConfiguration(): array
'allowed_hosts' => null,
'allow_mailto' => true,
'force_https' => false,
'rel' => null,
];
}

protected function createNode(\DOMNode $domNode, Cursor $cursor): NodeInterface
{
$node = new ANode($cursor->node);
$node->setAttribute('href', $this->sanitizer->sanitize($this->getAttribute($domNode, 'href')));
if ($this->config['rel'] !== null) {
$node->setAttribute('rel', $this->config['rel']);
}

return $node;
}
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41 changes: 21 additions & 20 deletions tests/FullSanitizerTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@ public function createSanitizer(): SanitizerInterface
'allowed_hosts' => ['trusted.com', 'external.com'],
'allow_mailto' => true,
'force_https' => false,
'rel' => 'noopener',
],
'blockquote' => [
'allowed_attributes' => ['data-attr'],
Expand Down Expand Up @@ -196,19 +197,19 @@ public function provideFixtures(): array
],
[
'<a href="https://trusted.com" title="Link title" class="foo" data-attr="foo">Lorem ipsum</a>',
'<a href="https://trusted.com" title="Link title" data-attr="foo">Lorem ipsum</a>',
'<a href="https://trusted.com" rel="noopener" title="Link title" data-attr="foo">Lorem ipsum</a>',
],
[
'<a href="https://untrusted.com" title="Link title" class="foo" data-attr="foo">Lorem ipsum</a>',
'<a title="Link title" data-attr="foo">Lorem ipsum</a>',
'<a rel="noopener" title="Link title" data-attr="foo">Lorem ipsum</a>',
],
[
'<a href="https://external.com" title="Link title" class="foo" data-attr="foo">Lorem ipsum</a>',
'<a href="https://external.com" title="Link title" data-attr="foo">Lorem ipsum</a>',
'<a href="https://external.com" rel="noopener" title="Link title" data-attr="foo">Lorem ipsum</a>',
],
[
'<a href="mailto:test&#64;gmail.com" title="Link title" class="foo" data-attr="foo">Lorem ipsum</a>',
'<a href="mailto:test&#64;gmail.com" title="Link title" data-attr="foo">Lorem ipsum</a>',
'<a href="mailto:test&#64;gmail.com" rel="noopener" title="Link title" data-attr="foo">Lorem ipsum</a>',
],
[
'<blockquote class="foo" data-attr="foo">Lorem ipsum</blockquote>',
Expand Down Expand Up @@ -445,47 +446,47 @@ public function provideFixtures(): array

[
'<a href="mailto:test&#64;gmail.com">Test</a>',
'<a href="mailto:test&#64;gmail.com">Test</a>',
'<a href="mailto:test&#64;gmail.com" rel="noopener">Test</a>',
],
[
'<a href="mailto:alert(\'ok\')">Test</a>',
'<a>Test</a>',
'<a rel="noopener">Test</a>',
],
[
'<a href="javascript:alert(\'ok\')">Test</a>',
'<a>Test</a>',
'<a rel="noopener">Test</a>',
],
[
'<a href="javascript://%0Aalert(document.cookie)">Test</a>',
'<a>Test</a>',
'<a rel="noopener">Test</a>',
],
[
'<a href="http://untrusted.com" onclick="alert(\'ok\')">Test</a>',
'<a>Test</a>',
'<a rel="noopener">Test</a>',
],
[
'<a href="https://trusted.com">Test</a>',
'<a href="https://trusted.com">Test</a>',
'<a href="https://trusted.com" rel="noopener">Test</a>',
],
[
'<a>Lorem ipsum</a>',
'<a>Lorem ipsum</a>',
'<a rel="noopener">Lorem ipsum</a>',
],
[
'<a href="&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#39;&#88;&#83;&#83;&#39;&#41;">Lorem ipsum</a>',
'<a>Lorem ipsum</a>',
'<a rel="noopener">Lorem ipsum</a>',
],
[
'<a href="http://trusted.com/index.html#this:stuff">Lorem ipsum</a>',
'<a href="http://trusted.com/index.html#this:stuff">Lorem ipsum</a>',
'<a href="http://trusted.com/index.html#this:stuff" rel="noopener">Lorem ipsum</a>',
],
[
'<a href="java\0&#14;\t\r\n script:alert(\\\'foo\\\')">Lorem ipsum</a>',
'<a>Lorem ipsum</a>',
'<a rel="noopener">Lorem ipsum</a>',
],
[
'<a href= onmouseover="alert(\\\'XSS\\\');">Lorem ipsum</a>',
'<a>Lorem ipsum</a>',
'<a rel="noopener">Lorem ipsum</a>',
],

// Inspired by https://twitter.com/brutelogic/status/1066333383276593152?s=19
Expand All @@ -497,7 +498,7 @@ public function provideFixtures(): array
// Inspired by https://html5sec.org
[
'<a href="javascript:&apos;<svg onload&equals;alert&lpar;1&rpar;&nvgt;&apos;">Lorem ipsum</a>',
'<a>Lorem ipsum</a>',
'<a rel="noopener">Lorem ipsum</a>',
],

/*
Expand All @@ -514,7 +515,7 @@ public function provideFixtures(): array
],
[
'<a href="javascript:alert(\'ok\')">Lorem ipsum dolor sit amet, consectetur adipisicing elit.</a>',
'<a>Lorem ipsum dolor sit amet, consectetur adipisicing elit.</a>',
'<a rel="noopener">Lorem ipsum dolor sit amet, consectetur adipisicing elit.</a>',
],
[
'<img src= onmouseover="alert(\'XSS\');" />',
Expand All @@ -526,7 +527,7 @@ public function provideFixtures(): array
],
[
'<<a href="javascript:evil"/>a href="javascript:evil"/>',
'<a>a href&#61;&#34;javascript:evil&#34;/&gt;</a>',
'<a rel="noopener">a href&#61;&#34;javascript:evil&#34;/&gt;</a>',
],
[
'!<textarea>&lt;/textarea&gt;&lt;svg/onload=prompt`xs`&gt;</textarea>!',
Expand All @@ -546,7 +547,7 @@ public function provideFixtures(): array
],
[
'<scr<a>ipt>alert(1)</script>',
'<a>ipt&gt;alert(1)</a>',
'<a rel="noopener">ipt&gt;alert(1)</a>',
],

/*
Expand All @@ -563,7 +564,7 @@ public function provideFixtures(): array
],
[
'<a style="font-size: 40px; color: red;">Lorem ipsum dolor sit amet, consectetur.</a>',
'<a>Lorem ipsum dolor sit amet, consectetur.</a>',
'<a rel="noopener">Lorem ipsum dolor sit amet, consectetur.</a>',
],
]);
}
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