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<?php
namespace Symfony\Component\Security\Encoder;
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien.potencier@symfony-project.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* MessageDigestPasswordEncoder uses a message digest algorithm.
*
* @author Fabien Potencier <fabien.potencier@symfony-project.com>
*/
class MessageDigestPasswordEncoder extends BasePasswordEncoder
{
protected $algorithm;
protected $encodeHashAsBase64;
/**
* Constructor.
*
* @param string $algorithm The digest algorithm to use
* @param Boolean $encodeHashAsBase64 Whether to base64 encode the password
* @param integer $iterations The number of iterations to use to stretch the password
*/
public function __construct($algorithm = 'sha1', $encodeHashAsBase64 = false, $iterations = 1)
{
$this->algorithm = $algorithm;
$this->encodeHashAsBase64 = $encodeHashAsBase64;
$this->iterations = $iterations;
}
/**
* {@inheritdoc}
*/
public function encodePassword($raw, $salt)
{
$salted = $this->mergePasswordAndSalt($raw, $salt);
$digest = call_user_func($this->algorithm, $salted);
// "stretch" the encoded value
for ($i = 1; $i < $this->iterations; $i++) {
$digest = call_user_func($this->algorithm, $digest);
}
return $this->encodeHashAsBase64 ? base64_encode($digest) : $digest;
}
/**
* {@inheritdoc}
*/
public function isPasswordValid($encoded, $raw, $salt)
{
return $this->comparePasswords($encoded, $this->encodePassword($raw, $salt));
}
}
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