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<?php |
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namespace PayumTW\Mypay; |
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use phpseclib\Crypt\AES; |
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class Encrypter |
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{ |
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/** |
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* $cipher. |
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* |
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* @var \phpseclib\Crypt\AES |
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*/ |
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protected $cipher; |
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/** |
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* $key. |
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* |
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* @var string |
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*/ |
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protected $key; |
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/** |
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* __construct. |
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* |
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* @param string $key |
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* @param \phpseclib\Crypt\AES $cipher |
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*/ |
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public function __construct($key, AES $cipher = null) |
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{ |
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$this->key = $key; |
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$this->cipher = $cipher ?: new AES(AES::MODE_CBC); |
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} |
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/** |
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* setKey. |
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* |
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* @param string $key |
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* @return static |
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*/ |
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public function setKey($key) |
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{ |
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$this->key = $key; |
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return $this; |
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} |
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/** |
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* encrypt. |
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* |
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* @param array $params |
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* @return string |
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*/ |
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public function encrypt($params) |
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{ |
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$plaintext = json_encode($params); |
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$this->cipher->setKey($this->key); |
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$result = $this->cipher->encrypt($plaintext); |
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$iv = $this->cipher->encryptIV; |
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return base64_encode($iv.$result); |
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} |
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/** |
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* encryptByPHP. |
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* |
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* @param array $params |
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* @return string |
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*/ |
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public function encryptByPHP($params) |
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{ |
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$plaintext = json_encode($params); |
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$size = mcrypt_get_iv_size(MCRYPT_CAST_256, MCRYPT_MODE_CBC); |
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$iv = mcrypt_create_iv($size, MCRYPT_DEV_URANDOM); |
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$padding = 16 - (strlen($plaintext) % 16); |
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$plaintext .= str_repeat(chr($padding), $padding); |
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$ciphertext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $this->key, $plaintext, MCRYPT_MODE_CBC, $iv); |
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return base64_encode($iv.$ciphertext); |
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} |
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/** |
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* decrypt. |
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* |
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* @param string $ciphertext |
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* @return array |
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*/ |
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public function decrypt($ciphertext) |
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{ |
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$encryptWithIV = base64_decode($ciphertext); |
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$iv = substr($encryptWithIV, 0, 16); |
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$ciphertext = substr($encryptWithIV, 16); |
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$this->cipher->setKey($this->key); |
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$this->cipher->setIV($iv); |
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return json_decode($this->cipher->decrypt($ciphertext), true); |
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} |
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/** |
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* decryptByPHP. |
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* |
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* @param string $ciphertext |
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* @return array |
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*/ |
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public function decryptByPHP($ciphertext) |
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{ |
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$encryptWithIV = base64_decode($ciphertext); |
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$iv = substr($encryptWithIV, 0, 16); |
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$ciphertext = substr($encryptWithIV, 16); |
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return json_decode( |
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$this->pkcs5Unpad( |
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mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $this->key, $ciphertext, MCRYPT_MODE_CBC, $iv) |
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), |
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true |
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); |
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} |
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/** |
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* encryptRequest. |
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* |
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* @param string $storeUid |
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* @param array $params |
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* @param string $cmd |
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* @param string $serviceName |
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* @return array |
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*/ |
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public function encryptRequest($storeUid, $params, $cmd = 'api/orders', $serviceName = 'api') |
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{ |
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return [ |
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'store_uid' => $storeUid, |
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'service' => $this->encrypt([ |
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'service_name' => $serviceName, |
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'cmd' => $cmd, |
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]), |
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'encry_data' => $this->encrypt($params), |
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]; |
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} |
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/** |
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* pkcs5Unpad. |
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* |
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* @param string $plaintext |
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* @return string |
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*/ |
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protected function pkcs5Unpad($plaintext) |
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{ |
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$pad = ord($plaintext[strlen($plaintext) - 1]); |
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if ($pad > strlen($plaintext)) { |
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return false; |
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} |
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if (strspn($plaintext, chr($pad), strlen($plaintext) - $pad) != $pad) { |
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return false; |
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} |
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return substr($plaintext, 0, -1 * $pad); |
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} |
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} |
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recca0120 /
payum-mypay
