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<?php |
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namespace Ds\Authenticate; |
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/** |
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* Hmac hashing functions. |
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* |
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* PHP version 5 |
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* |
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* @package Ds\Authenticate |
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* @author Dan Smith <[email protected]> |
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* @license MIT |
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* @license https://opensource.org/licenses/MIT |
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* @version v0.0.1 |
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* @link https://github.com/djsmithme/Authenticate |
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*/ |
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class HashHmac |
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{ |
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/** |
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* Hashing Algorithm. |
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* |
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* @var string |
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*/ |
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private $algorithm; |
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/** |
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* Private Key. |
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* |
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* @var string |
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*/ |
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private $privateKey; |
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private $payload; |
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/** |
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* Date Time Zone. |
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* |
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* @var \DateTimeZone |
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*/ |
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private $timezone; |
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/** |
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* BasicAuth constructor. |
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* |
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* @param string $privateKey |
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* @param string $algo |
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* @param string $timezone |
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*/ |
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public function __construct($privateKey, $algo = 'sha512', $timezone = 'UTC') |
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{ |
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$this->privateKey = $privateKey; |
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$this->algorithm = $algo; |
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$this->timezone = new \DateTimeZone($timezone); |
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} |
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/** |
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* Creates hash from payload. |
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* |
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* @param array $payload |
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* @return mixed |
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*/ |
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public function createHash($algorithm, array $payload = [], $privateKey) |
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{ |
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$this->payload = json_encode($payload); |
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return hash_hmac( |
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$algorithm, |
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$this->payload, |
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$privateKey |
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3 |
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); |
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3 |
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} |
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3 |
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public function getEncodedHash(array $payload = []){ |
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$hash = $this->createHash($this->algorithm, $payload); |
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return base64_encode($this->algorithm.'='.$hash); |
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3 |
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} |
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3 |
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3 |
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/** |
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* Compare received hash against payload. |
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3 |
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* |
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* @param $encodedHash |
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* @param array $payload |
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* @return bool |
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* @throws \Exception |
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*/ |
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public function compareHash($encodedHash, array $payload = []) |
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{ |
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$decodedHash = base64_decode($encodedHash); |
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list($algo, $hash) = array_pad( explode('=', $decodedHash), 4, $this->algorithm); |
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$payloadHash = $this->createHash($this->algorithm, $payload, $this->privateKey); |
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4 |
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try { |
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$this->verifyAlgorithm($algo); |
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$this->verifyHash($hash, $payloadHash); |
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} catch (\Exception $e) { |
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throw new \Exception($e->getMessage()); |
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} |
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4 |
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return true; |
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} |
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2 |
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2 |
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/** |
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* @param $key |
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* @return $this |
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*/ |
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public function setPrivateKey($key) |
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1 |
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{ |
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$new = clone $this; |
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$new->privateKey = $key; |
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1 |
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return $new; |
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} |
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/** |
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* Return current Algorithm |
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* |
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* @return string |
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*/ |
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public function getAlgorithm() |
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1 |
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{ |
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return $this->algorithm; |
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1 |
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} |
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1 |
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public function getPayload(){ |
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return $this->payload; |
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} |
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/** |
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* Returns Current Private Key |
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* |
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* @return string |
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*/ |
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public function getPrivateKey() |
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{ |
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return $this->privateKey; |
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} |
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/** |
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1 |
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* @param string $hash |
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* @param string $payloadHash |
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1 |
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* @return bool |
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* @throws \Exception |
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*/ |
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public function verifyHash($hash = '', $payloadHash = '') |
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{ |
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if (!is_string($hash) || !is_string($payloadHash)) { |
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throw new \Exception('hashes are not of the same type'); |
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} |
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if (\md5($hash) === \md5($payloadHash) |
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&& strlen($hash) === strlen($payloadHash) |
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) { |
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return true; |
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} |
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throw new \Exception('hashes do not match'); |
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} |
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protected function verifyAlgorithm($algo) |
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{ |
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foreach (hash_algos() as $validAlgo) { |
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if ($algo === $validAlgo) { |
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$this->algorithm = $validAlgo; |
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return $this->algorithm; |
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} |
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} |
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6 |
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throw new \Exception('Algorithm is not valid'); |
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1 |
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} |
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} |
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djsmithme /
Authenticate
This check looks for function calls that miss required arguments.