summaryrefslogtreecommitdiffstats
path: root/tests/codeigniter/core/Security_test.php
blob: bab76dffb1a90515f213d324cc1f07903b8e1505 (plain)
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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
<?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_string_array()
	{
		$harm_strings = array(
			"Hello, i try to <script>alert('Hack');</script> your site",
			"Simple clean string",
			"Hello, i try to <script>alert('Hack');</script> your site"
		);

		$harmless_strings = $this->security->xss_clean($harm_strings);

		$this->assertEquals("Hello, i try to [removed]alert&#40;'Hack'&#41;;[removed] your site", $harmless_strings[0]);
		$this->assertEquals("Simple clean string", $harmless_strings[1]);
		$this->assertEquals("Hello, i try to [removed]alert&#40;'Hack'&#41;;[removed] your site", $harmless_strings[2]);
	}

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

	public function test_xss_clean_image_valid()
	{
		$harm_string = '<img src="test.png">';

		$xss_clean_return = $this->security->xss_clean($harm_string, TRUE);

		$this->assertTrue($xss_clean_return);
	}

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

	public function test_xss_clean_image_invalid()
	{
		$harm_string = '<img src=javascript:alert(String.fromCharCode(88,83,83))>';

		$xss_clean_return = $this->security->xss_clean($harm_string, TRUE);

		$this->assertFalse($xss_clean_return);
	}

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

	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_xss_clean_js_img_removal()
	{
		$input = '<img src="&#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';
		$this->assertEquals('<img >', $this->security->xss_clean($input));
	}

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

	public function test_xss_clean_sanitize_naughty_html()
	{
		$input = '<blink>';
		$this->assertEquals('&lt;blink&gt;', $this->security->xss_clean($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));
		$this->assertEquals('<foo [removed]>', $this->security->remove_evil_attributes('<foo fscommand=case-insensitive>', FALSE));
		$this->assertEquals('<foo [removed]>', $this->security->remove_evil_attributes('<foo seekSegmentTime=whatever>', 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_get_random_bytes()
	{
		$length = "invalid";
		$this->assertFalse($this->security->get_random_bytes($length));

		$length = 10;
		$this->assertNotEmpty($this->security->get_random_bytes($length));
	}

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

	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 alt="Smiley face" height="42" width="42" src="smiley.gif">',
			'<img src="http://www.w3schools.com/images/w3schools_green.jpg">',
			'<img src="/img/sunset.gif" height="100%" width="100%">',
			'<img src="mdn-logo-sm.png" alt="MD Logo" srcset="mdn-logo-HD.png 2x, mdn-logo-small.png 15w, mdn-banner-HD.png 100w 2x" />',
			'<img sqrc="/img/sunset.gif" height="100%" width="100%">',
			'<img srqc="/img/sunset.gif" height="100%" width="100%">',
			'<img srcq="/img/sunset.gif" height="100%" width="100%">'
		);

		$urls = array(
			'smiley.gif',
			'smiley.gif',
			'http://www.w3schools.com/images/w3schools_green.jpg',
			'/img/sunset.gif',
			'mdn-logo-sm.png',
			'<img sqrc="/img/sunset.gif" height="100%" width="100%">',
			'<img srqc="/img/sunset.gif" height="100%" width="100%">',
			'<img srcq="/img/sunset.gif" height="100%" width="100%">'
		);

		for ($i = 0; $i < count($imgtags); $i++)
		{
			$this->assertEquals($urls[$i], $this->security->strip_image_tags($imgtags[$i]));
		}
	}

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

	public function test_csrf_set_hash()
	{
		// 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');

		// leave csrf_cookie_name as blank to test _csrf_set_hash function
		$this->ci_set_config('csrf_cookie_name', '');

		$this->security = new Mock_Core_Security();

		$this->assertNotEmpty($this->security->get_csrf_hash());
	}
}