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1 | <?php |
2 | /** |
3 | * Pop PHP Framework (http://www.popphp.org/) |
4 | * |
5 | * @link https://github.com/popphp/popphp-framework |
6 | * @author Nick Sagona, III <dev@nolainteractive.com> |
7 | * @copyright Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com) |
8 | * @license http://www.popphp.org/license New BSD License |
9 | */ |
10 | |
11 | /** |
12 | * @namespace |
13 | */ |
14 | namespace Pop\Form\Element\Input; |
15 | |
16 | /** |
17 | * Form CSRF element class |
18 | * |
19 | * @category Pop |
20 | * @package Pop\Form |
21 | * @author Nick Sagona, III <dev@nolainteractive.com> |
22 | * @copyright Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com) |
23 | * @license http://www.popphp.org/license New BSD License |
24 | * @version 4.0.0 |
25 | */ |
26 | |
27 | class Csrf extends Hidden |
28 | { |
29 | |
30 | /** |
31 | * Current token data |
32 | * @var array |
33 | */ |
34 | protected array $token = []; |
35 | |
36 | /** |
37 | * Constructor |
38 | * |
39 | * Instantiate the CSRF input form element |
40 | * |
41 | * @param string $name |
42 | * @param ?string $value |
43 | * @param int $expire |
44 | * @param ?string $indent |
45 | */ |
46 | public function __construct(string $name, ?string $value = null, int $expire = 300, ?string $indent = null) |
47 | { |
48 | // Start a session. |
49 | if (session_id() == '') { |
50 | session_start(); |
51 | } |
52 | |
53 | // If token does not exist, create one |
54 | if (!isset($_SESSION['pop_csrf'])) { |
55 | $this->createNewToken($value, $expire); |
56 | // Else, retrieve existing token |
57 | } else { |
58 | $this->token = unserialize($_SESSION['pop_csrf']); |
59 | |
60 | // Check to see if the token has expired |
61 | if ($this->token['expire'] > 0) { |
62 | if (($this->token['expire'] + $this->token['start']) < time()) { |
63 | $this->createNewToken($value, $expire); |
64 | } |
65 | } |
66 | } |
67 | |
68 | parent::__construct($name, $this->token['value'], $indent); |
69 | $this->setRequired(true); |
70 | $this->setValidator(); |
71 | } |
72 | |
73 | /** |
74 | * Set the token of the csrf form element |
75 | * |
76 | * @param ?string $value |
77 | * @param int $expire |
78 | * @return Csrf |
79 | */ |
80 | public function createNewToken(?string $value = null, int $expire = 300): Csrf |
81 | { |
82 | $this->token = [ |
83 | 'value' => sha1(rand(10000, getrandmax()) . $value), |
84 | 'expire' => (int)$expire, |
85 | 'start' => time() |
86 | ]; |
87 | $_SESSION['pop_csrf'] = serialize($this->token); |
88 | return $this; |
89 | } |
90 | |
91 | /** |
92 | * Set the validator |
93 | * |
94 | * @throws Exception |
95 | * @return void |
96 | */ |
97 | protected function setValidator(): void |
98 | { |
99 | // Get query data |
100 | if (!isset($_SERVER['REQUEST_METHOD'])) { |
101 | throw new Exception('Error: The server request method is not set.'); |
102 | } |
103 | |
104 | $queryData = []; |
105 | switch ($_SERVER['REQUEST_METHOD']) { |
106 | case 'GET': |
107 | $queryData = $_GET; |
108 | break; |
109 | |
110 | case 'POST': |
111 | $queryData = $_POST; |
112 | break; |
113 | |
114 | default: |
115 | $input = fopen('php://input', 'r'); |
116 | $qData = null; |
117 | while ($data = fread($input, 1024)) { |
118 | $qData .= $data; |
119 | } |
120 | |
121 | parse_str($qData, $queryData); |
122 | } |
123 | |
124 | // If there is query data, set validator to check against the token value |
125 | if (count($queryData) > 0) { |
126 | $val = (isset($queryData[$this->name])) ? $queryData[$this->name] : ''; |
127 | $this->addValidator(new \Pop\Validator\Equal($val, 'The security token does not match.')); |
128 | } |
129 | } |
130 | |
131 | } |