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<?php |
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/* |
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+------------------------------------------------------------------------+ |
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| Plinker-RPC PHP | |
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+------------------------------------------------------------------------+ |
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| Copyright (c)2017-2018 (https://github.com/plinker-rpc/core) | |
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+------------------------------------------------------------------------+ |
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| This source file is subject to MIT License | |
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| that is bundled with this package in the file LICENSE. | |
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| | |
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| If you did not receive a copy of the license and are unable to | |
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| obtain it through the world-wide-web, please send an email | |
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| to [email protected] so we can send you a copy immediately. | |
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+------------------------------------------------------------------------+ |
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| Authors: Lawrence Cherone <[email protected]> | |
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+------------------------------------------------------------------------+ |
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*/ |
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namespace Plinker\Core\Lib; |
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use Opis\Closure\SerializableClosure; |
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/** |
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* Plinker\Core\Lib\Signer |
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*/ |
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final class Signer |
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{ |
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/** |
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* @var |
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*/ |
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private $config; |
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/** |
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* Class construct |
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* |
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* @param array $config - config array which holds object configuration |
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* @return void |
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*/ |
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public function __construct($config = []) |
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{ |
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// |
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$this->config = array_merge([ |
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"secret" => null |
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], $config); |
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// hash secret |
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if (isset($this->config["secret"])) { |
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$this->config["secret"] = hash("sha256", gmdate("h").$this->config["secret"]); |
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} |
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} |
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/** |
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* @codeCoverageIgnore |
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*/ |
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private function encrypt($plaintext, $password) |
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{ |
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$method = "AES-256-CBC"; |
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$key = (string) hash("sha256", $password, true); |
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$iv = (string) openssl_random_pseudo_bytes(16); |
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$ciphertext = (string) openssl_encrypt($plaintext, $method, $key, OPENSSL_RAW_DATA, $iv); |
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$hash = (string) hash_hmac("sha256", $ciphertext, $key, true); |
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return base64_encode($iv . $hash . $ciphertext); |
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} |
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/** |
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* @codeCoverageIgnore |
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*/ |
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private function decrypt($ciphertext, $password) |
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{ |
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$ciphertext = base64_decode($ciphertext); |
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$method = "AES-256-CBC"; |
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$iv = substr($ciphertext, 0, 16); |
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$hash = substr($ciphertext, 16, 32); |
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$ciphertext = substr($ciphertext, 48); |
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$key = (string) hash("sha256", $password, true); |
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if (hash_hmac("sha256", $ciphertext, $key, true) !== $hash) { |
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return null; |
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} |
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return openssl_decrypt($ciphertext, $method, $key, OPENSSL_RAW_DATA, $iv); |
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} |
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/** |
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* Sign and encrypt into payload array. |
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* |
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* @codeCoverageIgnore |
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* |
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* @return array |
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*/ |
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public function encode($data) |
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{ |
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// loop over params, look for closure |
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if (isset($data['params']) && is_array($data['params'])) { |
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foreach ($data['params'] as $key => $param) { |
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if (is_object($param) && ($param instanceof \Closure)) { |
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$data['params'][$key] = new SerializableClosure($param); |
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} |
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} |
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} |
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$data = serialize($data); |
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return [ |
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"data" => $this->encrypt($data, $this->config["secret"]), |
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"token" => hash_hmac( |
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"sha256", |
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$data, |
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$this->config["secret"] |
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) |
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]; |
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} |
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/** |
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* Decrypt, verify and unserialize payload. |
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* |
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* @codeCoverageIgnore |
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* |
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* @return mixed |
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*/ |
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public function decode($data) |
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{ |
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$data["data"] = $this->decrypt($data["data"], $this->config["secret"]); |
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if (hash_hmac( |
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"sha256", |
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$data["data"], |
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$this->config["secret"] |
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) == $data["token"]) { |
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return unserialize($data["data"]); |
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} else { |
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throw new \Exception('Failed to verify payload'); |
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} |
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} |
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} |
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plinker-rpc /
core
