|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* @package s9e\TextFormatter |
|
5
|
|
|
* @copyright Copyright (c) 2010-2019 The s9e Authors |
|
6
|
|
|
* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
|
7
|
|
|
*/ |
|
8
|
|
|
namespace s9e\TextFormatter\Configurator\TemplateChecks; |
|
9
|
|
|
|
|
10
|
|
|
use DOMAttr; |
|
11
|
|
|
use DOMElement; |
|
12
|
|
|
use DOMText; |
|
13
|
|
|
use s9e\TextFormatter\Configurator\Helpers\TemplateHelper; |
|
14
|
|
|
use s9e\TextFormatter\Configurator\Items\Attribute; |
|
15
|
|
|
use s9e\TextFormatter\Configurator\Items\Tag; |
|
16
|
|
|
|
|
17
|
|
|
/** |
|
18
|
|
|
* This primary use of this check is to ensure that dynamic content cannot be used to create |
|
19
|
|
|
* javascript: links |
|
20
|
|
|
*/ |
|
21
|
|
|
class DisallowUnsafeDynamicURL extends AbstractDynamicContentCheck |
|
22
|
|
|
{ |
|
23
|
|
|
/** |
|
24
|
|
|
* @var string Regexp used to exclude nodes that start with a hardcoded scheme part, a hardcoded |
|
25
|
|
|
* local part, or a fragment |
|
26
|
|
|
*/ |
|
27
|
|
|
protected $safeUrlRegexp = '(^(?:(?!data|\\w*script)\\w+:|[^:]*/|#))i'; |
|
28
|
|
|
|
|
29
|
|
|
/** |
|
30
|
|
|
* {@inheritdoc} |
|
31
|
|
|
*/ |
|
32
|
16 |
|
protected function getNodes(DOMElement $template) |
|
33
|
|
|
{ |
|
34
|
16 |
|
return TemplateHelper::getURLNodes($template->ownerDocument); |
|
35
|
|
|
} |
|
36
|
|
|
|
|
37
|
|
|
/** |
|
38
|
|
|
* {@inheritdoc} |
|
39
|
|
|
*/ |
|
40
|
8 |
|
protected function isSafe(Attribute $attribute) |
|
41
|
|
|
{ |
|
42
|
8 |
|
return $attribute->isSafeAsURL(); |
|
43
|
|
|
} |
|
44
|
|
|
|
|
45
|
|
|
/** |
|
46
|
|
|
* {@inheritdoc} |
|
47
|
|
|
*/ |
|
48
|
8 |
|
protected function checkAttributeNode(DOMAttr $attribute, Tag $tag) |
|
49
|
|
|
{ |
|
50
|
8 |
|
if (!$this->isSafeUrl($attribute->value)) |
|
51
|
|
|
{ |
|
52
|
8 |
|
parent::checkAttributeNode($attribute, $tag); |
|
53
|
|
|
} |
|
54
|
|
|
} |
|
55
|
|
|
|
|
56
|
|
|
/** |
|
57
|
|
|
* {@inheritdoc} |
|
58
|
|
|
*/ |
|
59
|
6 |
|
protected function checkElementNode(DOMElement $element, Tag $tag) |
|
60
|
|
|
{ |
|
61
|
6 |
|
if (!$this->elementHasSafeUrl($element)) |
|
62
|
|
|
{ |
|
63
|
6 |
|
parent::checkElementNode($element, $tag); |
|
64
|
|
|
} |
|
65
|
|
|
} |
|
66
|
|
|
|
|
67
|
|
|
/** |
|
68
|
|
|
* Test whether given element contains a known-safe URL |
|
69
|
|
|
* |
|
70
|
|
|
* @param DOMElement $element |
|
71
|
|
|
* @return bool |
|
72
|
|
|
*/ |
|
73
|
6 |
|
protected function elementHasSafeUrl(DOMElement $element) |
|
74
|
|
|
{ |
|
75
|
6 |
|
return $element->firstChild instanceof DOMText && $this->isSafeUrl($element->firstChild->textContent); |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
/** |
|
79
|
|
|
* Test whether given URL is known to be safe |
|
80
|
|
|
* |
|
81
|
|
|
* @param string $url |
|
82
|
|
|
* @return bool |
|
83
|
|
|
*/ |
|
84
|
9 |
|
protected function isSafeUrl($url) |
|
85
|
|
|
{ |
|
86
|
9 |
|
return (bool) preg_match($this->safeUrlRegexp, $url); |
|
87
|
|
|
} |
|
88
|
|
|
} |
s9e /
TextFormatter
