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e9631169 S |
1 | <?php |
2 | /** | |
3 | * @author Jan Altensen (Stricted) | |
4 | * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php> | |
5 | * @copyright 2015 Jan Altensen (Stricted) | |
6 | */ | |
7 | trait CryptLib { | |
e9631169 S |
8 | /** |
9 | * decrypt data from router | |
10 | * | |
11 | * @param string $data | |
12 | * @return array | |
13 | */ | |
14 | private function decrypt ($data) { | |
15 | $iv = hex2bin(substr($this->challenge, 16, 16)); | |
16 | $adata = hex2bin(substr($this->challenge, 32, 16)); | |
17 | $key = hex2bin($this->derivedk); | |
18 | $enc = hex2bin($data); | |
19 | ||
20 | $factory = new CryptLib\Cipher\Factory(); | |
21 | $aes = $factory->getBlockCipher('rijndael-128'); | |
22 | $aes->setKey($key); | |
23 | $mode = $factory->getMode('ccm', $aes, $iv, [ 'adata' => $adata, 'lSize' => 7]); | |
24 | ||
25 | $mode->decrypt($enc); | |
26 | ||
27 | return $mode->finish(); | |
28 | } | |
29 | ||
30 | /** | |
31 | * decrypt data for the router | |
32 | * | |
33 | * @param string $data | |
34 | * @return string | |
35 | */ | |
36 | private function encrypt ($data) { | |
37 | $iv = hex2bin(substr($this->challenge, 16, 16)); | |
38 | $adata = hex2bin(substr($this->challenge, 32, 16)); | |
39 | $key = hex2bin($this->derivedk); | |
40 | ||
41 | $factory = new CryptLib\Cipher\Factory(); | |
42 | $aes = $factory->getBlockCipher('rijndael-128'); | |
43 | $aes->setKey($key); | |
44 | $mode = $factory->getMode('ccm', $aes, $iv, [ 'adata' => $adata, 'lSize' => 7]); | |
45 | $mode->encrypt($data); | |
46 | ||
47 | return bin2hex($mode->finish()); | |
48 | } | |
49 | } |