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<?php namespace SimpleHash\Calculator; |
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/** |
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* Bcrypt hash calculator class |
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* |
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* @package SimpleHash |
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* @author Kai Hempel <[email protected]> |
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* @copyright 2016 Kai Hempel <[email protected]> |
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* @license http://www.opensource.org/licenses/BSD-3-Clause The BSD 3-Clause License |
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* @link https://www.kuweh.de/ |
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* @since Class available since Release 1.0.0 |
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*/ |
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class BcryptCalculator implements HashCalculatorInterface |
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{ |
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const DEFAULT_COST = '10'; |
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const DEFAULT_SALT = 'Af13GgKoL503sCvf42dJ18'; |
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/** |
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* Costs |
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* |
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* @var string |
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*/ |
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private $cost = ''; |
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/** |
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* Salt |
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* |
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* @var string |
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*/ |
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private $salt = ''; |
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/** |
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* Constructor |
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* |
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* @param array $params |
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*/ |
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public function __construct(array $params = array()) |
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{ |
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$this->setCostFromParams($params); |
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$this->setSaltFromParams($params); |
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} |
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/** |
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* Returns the Bcrypt hash |
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* |
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* @param string $data |
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* @return string |
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*/ |
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public function getHash($data) |
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{ |
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return crypt($data, $this->buildSaltString()); |
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} |
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/** |
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* Builds the final salt string for PHP crypt. |
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* The blowfish type "$2y$" is used. |
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* |
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* @return string |
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*/ |
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private function buildSaltString() |
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{ |
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return '$2y$' . $this->cost . '$' . $this->salt . '$'; |
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} |
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/** |
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* Sets the salt string from parameter array. |
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* If no salt is given, the default value will be used! |
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* |
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* @return void |
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*/ |
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private function setSaltFromParams(array $params) |
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{ |
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$salt = $this->getMatchingData($params, '/^[\.\\A-Za-z0-9]{22}$/'); |
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$this->salt = (! empty($salt)) ? $salt : self::DEFAULT_SALT; |
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} |
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/** |
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* Sets the cost string from parameter array. |
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* If no cost is given, the default value will be used! |
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* |
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* @return void |
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*/ |
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private function setCostFromParams(array $params) |
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{ |
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$cost = (int)$this->getMatchingData($params, '/^[0-9]{1,2}$/'); |
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$this->cost = (! empty($cost)) ? (string)$cost : self::DEFAULT_COST; |
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} |
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/** |
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* Returns the first match from parameter array |
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* |
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* @param array $params |
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* @param string $regex |
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* @return string |
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*/ |
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private function getMatchingData(array $params, $regex) |
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{ |
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foreach ($params as $data) { |
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if (preg_match($regex, $data)) { |
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return $data; |
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} |
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} |
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return ''; |
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} |
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} |
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kaihempel /
simplehash
