1 | <?php |
||
2 | |||
3 | namespace ByTIC\Omnipay\Twispay; |
||
4 | |||
5 | /** |
||
6 | * Class Helper |
||
7 | * @package ByTIC\Omnipay\Twispay |
||
8 | */ |
||
9 | class Helper |
||
10 | { |
||
11 | /** |
||
12 | * @param array $data |
||
13 | * @param string $key |
||
14 | * @return string |
||
15 | */ |
||
16 | 3 | public static function generateChecksum(array $data, string $key) |
|
17 | { |
||
18 | 3 | unset($data['checksum']); |
|
19 | 3 | self::recursiveKeySort($data); |
|
20 | 3 | $query = http_build_query($data); |
|
21 | 3 | $encoded = hash_hmac('sha512', $query, $key, true); |
|
22 | 3 | return base64_encode($encoded); |
|
23 | } |
||
24 | |||
25 | /** |
||
26 | * @param array $data |
||
27 | */ |
||
28 | 3 | private static function recursiveKeySort(array &$data) |
|
29 | { |
||
30 | 3 | ksort($data, SORT_STRING); |
|
31 | 3 | foreach ($data as $key => $value) { |
|
32 | 3 | if (is_array($value)) { |
|
33 | 3 | self::recursiveKeySort($data[$key]); |
|
34 | } |
||
35 | } |
||
36 | 3 | } |
|
37 | |||
38 | /** |
||
39 | * @param string $encrypted |
||
40 | * @param $key |
||
41 | * @return null|string |
||
42 | * @throws \Exception |
||
43 | */ |
||
44 | public static function decrypt(string $encrypted, $key) |
||
45 | { |
||
46 | if (strpos($encrypted, ',') !== false) { |
||
47 | $encryptedParts = explode(',', $encrypted, 2); |
||
48 | $iv = base64_decode($encryptedParts[0]); |
||
49 | if ($iv === false) { |
||
50 | throw new \Exception('Invalid encryption iv'); |
||
51 | } |
||
52 | $encrypted = base64_decode($encryptedParts[1]); |
||
53 | if ($encrypted === false) { |
||
54 | throw new \Exception('Invalid encrypted data'); |
||
55 | } |
||
56 | $decrypted = openssl_decrypt($encrypted, 'aes-256-cbc', $key, OPENSSL_RAW_DATA, $iv); |
||
0 ignored issues
–
show
Bug
introduced
by
Loading history...
|
|||
57 | if ($decrypted === false) { |
||
58 | throw new \Exception('Cannot decrypt data'); |
||
59 | } |
||
60 | return $decrypted; |
||
61 | } |
||
62 | return null; |
||
63 | } |
||
64 | } |
||
65 |