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<?php |
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/* |
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* This file is part of the overtrue/wechat. |
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* |
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* (c) overtrue <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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/** |
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* Encryptor.php. |
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* |
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* Part of Overtrue\WeChat. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @author mingyoung <[email protected]> |
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* @copyright 2016 |
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* |
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* @see https://github.com/overtrue |
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* @see http://overtrue.me |
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*/ |
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namespace EasyWeChat\MiniProgram\Encryption; |
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use EasyWeChat\Encryption\EncryptionException; |
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use EasyWeChat\Encryption\Encryptor as BaseEncryptor; |
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use EasyWeChat\Support\Collection; |
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use Exception as BaseException; |
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class Encryptor extends BaseEncryptor |
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{ |
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/** |
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* {@inheritdoc}. |
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*/ |
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protected $aesKeyLength = 24; |
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/** |
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* A non-NULL Initialization Vector. |
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* |
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* @var string |
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*/ |
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protected $iv; |
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/** |
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* Encryptor constructor. |
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* |
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* @param string $sessionKey |
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* @param string $iv |
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*/ |
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public function __construct($sessionKey, $iv) |
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{ |
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$this->iv = base64_decode($iv, true); |
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parent::__construct(null, null, $sessionKey); |
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} |
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/** |
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* Decrypt data. |
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* |
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* @param $encrypted |
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* |
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* @return string |
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*/ |
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public function decryptData($encrypted) |
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{ |
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return $this->decrypt($encrypted); |
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} |
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/** |
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* Decrypt data. |
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* |
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* @param string $encrypted |
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* |
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* @return Collection |
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* |
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* @throws EncryptionException |
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*/ |
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private function decrypt($encrypted) |
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{ |
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try { |
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$key = $this->getAESKey(); |
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$ciphertext = base64_decode($encrypted, true); |
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$decrypted = openssl_decrypt($ciphertext, 'aes-128-cbc', $key, OPENSSL_RAW_DATA | OPENSSL_NO_PADDING, $this->iv); |
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$result = $this->decode($decrypted); |
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} catch (BaseException $e) { |
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throw new EncryptionException($e->getMessage(), EncryptionException::ERROR_DECRYPT_AES); |
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} |
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$result = json_decode($result, true); |
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return new Collection($result); |
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} |
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} |
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overtrue /
wechat
Overwriting private methods is generally fine as long as you also use private visibility. It might still be preferable for understandability to use a different method name.