* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Security\Core\Encoder; use Symfony\Component\Security\Core\Exception\BadCredentialsException; /** * MessageDigestPasswordEncoder uses a message digest algorithm. * * @author Fabien Potencier */ class MessageDigestPasswordEncoder extends BasePasswordEncoder { private $algorithm; private $encodeHashAsBase64; private $iterations; /** * Constructor. * * @param string $algorithm The digest algorithm to use * @param Boolean $encodeHashAsBase64 Whether to base64 encode the password hash * @param integer $iterations The number of iterations to use to stretch the password hash */ public function __construct($algorithm = 'sha512', $encodeHashAsBase64 = true, $iterations = 5000) { $this->algorithm = $algorithm; $this->encodeHashAsBase64 = $encodeHashAsBase64; $this->iterations = $iterations; } /** * {@inheritdoc} */ public function encodePassword($raw, $salt) { if ($this->isPasswordTooLong($raw)) { throw new BadCredentialsException('Invalid password.'); } if (!in_array($this->algorithm, hash_algos(), true)) { throw new \LogicException(sprintf('The algorithm "%s" is not supported.', $this->algorithm)); } $salted = $this->mergePasswordAndSalt($raw, $salt); $digest = hash($this->algorithm, $salted, true); // "stretch" hash for ($i = 1; $i < $this->iterations; $i++) { $digest = hash($this->algorithm, $digest.$salted, true); } return $this->encodeHashAsBase64 ? base64_encode($digest) : bin2hex($digest); } /** * {@inheritdoc} */ public function isPasswordValid($encoded, $raw, $salt) { return !$this->isPasswordTooLong($raw) && $this->comparePasswords($encoded, $this->encodePassword($raw, $salt)); } }