tests/codeigniter/core/Security_test.php


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149

<?php

class Security_test extends CI_TestCase {

	public function set_up()
	{
		// Set cookie for security test
		$_COOKIE['ci_csrf_cookie'] = md5(uniqid(mt_rand(), TRUE));

		// Set config for Security class
		$this->ci_set_config('csrf_protection', TRUE);
		$this->ci_set_config('csrf_token_name', 'ci_csrf_token');
		$this->ci_set_config('csrf_cookie_name', 'ci_csrf_cookie');

		$this->security = new Mock_Core_Security();
	}

	// --------------------------------------------------------------------

	public function test_csrf_verify()
	{
		$_SERVER['REQUEST_METHOD'] = 'GET';

		$this->assertInstanceOf('CI_Security', $this->security->csrf_verify());
	}

	// --------------------------------------------------------------------

	public function test_csrf_verify_invalid()
	{
		// Without issuing $_POST[csrf_token_name], this request will triggering CSRF error
		$_SERVER['REQUEST_METHOD'] = 'POST';

		$this->setExpectedException('RuntimeException', 'CI Error: The action you have requested is not allowed');

		$this->security->csrf_verify();
	}

	// --------------------------------------------------------------------

	public function test_csrf_verify_valid()
	{
		$_SERVER['REQUEST_METHOD'] = 'POST';
		$_POST[$this->security->csrf_token_name] = $this->security->csrf_hash;

		$this->assertInstanceOf('CI_Security', $this->security->csrf_verify());
	}

	// --------------------------------------------------------------------

	public function test_get_csrf_hash()
	{
		$this->assertEquals($this->security->csrf_hash, $this->security->get_csrf_hash());
	}

	// --------------------------------------------------------------------

	public function test_get_csrf_token_name()
	{
		$this->assertEquals('ci_csrf_token', $this->security->get_csrf_token_name());
	}

	// --------------------------------------------------------------------

	public function test_xss_clean()
	{
		$harm_string = "Hello, i try to <script>alert('Hack');</script> your site";

		$harmless_string = $this->security->xss_clean($harm_string);

		$this->assertEquals("Hello, i try to [removed]alert&#40;'Hack'&#41;;[removed] your site", $harmless_string);
	}

	public function test_xss_clean_entity_double_encoded()
	{
		$input = '<a href="&#38&#35&#49&#48&#54&#38&#35&#57&#55&#38&#35&#49&#49&#56&#38&#35&#57&#55&#38&#35&#49&#49&#53&#38&#35&#57&#57&#38&#35&#49&#49&#52&#38&#35&#49&#48&#53&#38&#35&#49&#49&#50&#38&#35&#49&#49&#54&#38&#35&#53&#56&#38&#35&#57&#57&#38&#35&#49&#49&#49&#38&#35&#49&#49&#48&#38&#35&#49&#48&#50&#38&#35&#49&#48&#53&#38&#35&#49&#49&#52&#38&#35&#49&#48&#57&#38&#35&#52&#48&#38&#35&#52&#57&#38&#35&#52&#49">Clickhere</a>';
		$this->assertEquals('<a >Clickhere</a>', $this->security->xss_clean($input));
	}

	// --------------------------------------------------------------------

	public function test_remove_evil_attributes()
	{
		$this->assertEquals('<foo [removed]>', $this->security->remove_evil_attributes('<foo onAttribute="bar">', false));
		$this->assertEquals('<foo [removed]>', $this->security->remove_evil_attributes('<foo onAttributeNoQuotes=bar>', false));
		$this->assertEquals('<foo [removed]>', $this->security->remove_evil_attributes('<foo onAttributeWithSpaces = bar>', false));
		$this->assertEquals('<foo prefixOnAttribute="bar">', $this->security->remove_evil_attributes('<foo prefixOnAttribute="bar">', false));
		$this->assertEquals('<foo>onOutsideOfTag=test</foo>', $this->security->remove_evil_attributes('<foo>onOutsideOfTag=test</foo>', false));
		$this->assertEquals('onNoTagAtAll = true', $this->security->remove_evil_attributes('onNoTagAtAll = true', false));
	}

	// --------------------------------------------------------------------

	public function test_xss_hash()
	{
		$this->assertEmpty($this->security->xss_hash);

		// Perform hash
		$this->security->xss_hash();

		$this->assertTrue(preg_match('#^[0-9a-f]{32}$#iS', $this->security->xss_hash) === 1);
	}

	// --------------------------------------------------------------------

	public function test_entity_decode()
	{
		$encoded = '&lt;div&gt;Hello &lt;b&gt;Booya&lt;/b&gt;&lt;/div&gt;';
		$decoded = $this->security->entity_decode($encoded);

		$this->assertEquals('<div>Hello <b>Booya</b></div>', $decoded);

		// Issue #3057 (https://github.com/bcit-ci/CodeIgniter/issues/3057)
		$this->assertEquals(
			'&foo should not include a semicolon',
			$this->security->entity_decode('&foo should not include a semicolon')
		);
	}

	// --------------------------------------------------------------------

	public function test_sanitize_filename()
	{
		$filename = './<!--foo-->';
		$safe_filename = $this->security->sanitize_filename($filename);

		$this->assertEquals('foo', $safe_filename);
	}
        
        // --------------------------------------------------------------------

	public function test_strip_image_tags()
	{
                $imgtags = Array(
                    '<img src="smiley.gif" alt="Smiley face" height="42" width="42">',
                    '<img src="http://www.w3schools.com/images/w3schools_green.jpg">'
                );
                
                $urls = Array(
                    'smiley.gif',
                    'http://www.w3schools.com/images/w3schools_green.jpg'
                );
                
                for($i = 0; $i < count($imgtags); $i++) 
                {
                    $this->assertEquals($urls[$i], $this->security->strip_image_tags($imgtags[$i]));
                }
	}
}